Automatic Heating Systems With Controls Patents (Class 237/2A)
  • Patent number: 6152217
    Abstract: When target blowout temperature to the inside of a vehicle is over a predetermined temperature in, an air temperature control system according to the present invention controls a cooling-ability controller to control air temperature of air cooled by a heat exchanger for cooling so that airflow becomes a predetermined temperature, and reduces the amount of blowout air into the vehicle per unit time compared with the amount of the blowout air when the target blowout temperature is under the predetermined temperature. Accordingly, the cooling air temperature due to the heat exchanger for cooling is fixed at the predetermined temperature even when the target blowout temperature is over the predetermined temperature. Therefore, generation of malodors due to dust and mold in the heat exchanger for cooling is prevented.
    Type: Grant
    Filed: December 23, 1996
    Date of Patent: November 28, 2000
    Assignee: Denso Corporation
    Inventors: Yuji Ito, Takayoshi Kawai
  • Patent number: 6148910
    Abstract: A system provides a controlled supply of heat from an automotive engine to attery on board the vehicle. The system has a fluid circuit, a portion of which passes through an insulated box containing the battery and thereby heats the battery. Another portion of the fluid circuit bypasses the box. The fluid circuit has one or more valves for selectively interrupting flow of heated fluid to the box, the valves operating in response to driver input or signals sent by a temperature sensor in the box. The box itself is comprised of rigid side walls of insulative material, a floor of the same material and a lid that closely fits to the side walls in only one orientation relative to the box. On the box's inner peripheral surface is a heat reflective layer to which is mounted the battery heating coil of the fluid circuit. A low heat conductive spacer borders air gaps between the battery and the heating coil.
    Type: Grant
    Filed: April 20, 1999
    Date of Patent: November 21, 2000
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventor: Joseph G. Warner
  • Patent number: 6149066
    Abstract: A method and apparatus for controlling supplemental heat added to the air stream passing from an indoor coil to an air supply duct of a heat pump system, the heat pump system being of the type that includes an indoor thermostat having a first set point for initiating heat supplied by the indoor coil and a second set point for initiating additional heat supplied by supplemental heating means. The supplemental heating elements include an adjustable output heating element for heating air passing from the indoor coil to the air supply duct. The coil discharge temperature of the air stream heated by the indoor coil is determined at a position between the indoor coil and the supplemental heating means. The adjustable output heating element is selectively energized in response to the coil discharge temperature, independent of the second set point of the indoor thermostat.
    Type: Grant
    Filed: August 17, 1999
    Date of Patent: November 21, 2000
    Assignee: Carrier Corporation
    Inventors: Timothy J. Perry, Hongmei Liang, Larry J. Burkhart, Nathan D. Wright, Raymond A. Rust, Jr., Louis J. Sullivan
  • Patent number: 6145754
    Abstract: According to the present invention, even when the two-layer mode in which the inside air is introduced into a first air passage and the outside air is introduced into a second air passage is set, it is further determined whether air mix doors are controlled at the maximum hot positions. When it has been determined that the air mix doors are controlled at the maximum hot positions, the inside/outside air introduction mode is still set to the two-layer mode, because the temperature difference due to the outside air temperature is small, however, otherwise, the inside/outside air introduction mode is not set to the two-layer mode but is set to a mode in which the outside air is introduced into the both air passages. In this way, it is possible to prevent the difference between the temperatures of the air blown out from a defroster opening portion and a foot opening portion from being increased due to the temperature of the outside air.
    Type: Grant
    Filed: December 11, 1996
    Date of Patent: November 14, 2000
    Assignee: Denso Corporation
    Inventors: Yukio Uemura, Kazushi Shikata, Hiroshi Nonoyama, Hikaru Sugi, Kenji Suwa, Tadashi Suzuki
  • Patent number: 6135201
    Abstract: In an air conditioning apparatus for a vehicle, a double layer flow mode is set when the maximum heating state is set during an air outlet mode where both a foot opening portion and a defroster opening portion are opened. During the double layer flow mode, an air passage of an air conditioning case is partitioned into a first air passage through which inside air flows and a second air passage through which outside air flows, in such a manner that the first air passage communicates with the foot opening portion and the second air passage communicates with the defroster opening portion. When the double layer flow mode is set, the maximum rotation speed of a blower for blowing air is reduced by a predetermined level as compared with an entire outside air mode or an entire inside air mode. Thus, heating capacity for a passenger compartment of the vehicle can be improved.
    Type: Grant
    Filed: October 6, 1998
    Date of Patent: October 24, 2000
    Assignee: DENSO Corporation
    Inventors: Hiroshi Nonoyama, Takayoshi Kawai, Toshihiko Muraki, Tetsuya Takechi, Junji Yokoi, Makoto Mimoto
  • Patent number: 6116513
    Abstract: A system for continuing heating of a vehicle interior after the engine which normally controls the heating of the vehicle has been turned off. The system comprises a first control circuit located in the engine compartment of the vehicle which continues to pump heated engine coolant through the heater core of the vehicle after the engine has been turned off. A second control circuit located in the passenger compartment of the vehicle continues to operate the heater fan which blows air through the heater core and into the passenger compartment after the engine has been turned off. Thermostats in each circuit are operative to disconnect the battery when the coolant temperature is no longer effective to heat the passenger compartment. The first and second control circuits have no mechanical, electrical or electromagnetic interconnection therebetween.
    Type: Grant
    Filed: June 18, 1999
    Date of Patent: September 12, 2000
    Inventor: Frank J. Perhats, Sr.
  • Patent number: 6109532
    Abstract: A locomotive cab heating system having a plurality of separately actuated heating units housed in a supply air duct and connected to a microcontroller. Preferably, the system includes a high temperature shutdown thermostat. The microcontroller is equipped with memory storing a program that is configured to control the microcontroller to turn on and off a predetermined number of the heating units responsive to temperature readings received from the temperature sensor, thereby maintaining air temperature in the duct within a selected range, regardless of fan speed and air flow rate. By controlling the number of heating units in operation at any given time, the heating system of the present invention controls the heat delivered to a locomotive cab more effectively, thereby ensuring the comfort of the occupants of the cab. The locomotive cab heating system of the present invention is designed to be easily and inexpensively retrofitted to preexisting heating systems.
    Type: Grant
    Filed: April 15, 1998
    Date of Patent: August 29, 2000
    Assignee: Dayton-Phoenix Group, Inc.
    Inventors: Curt E. Schindler, Marc A. Richard, Donald E. Graham
  • Patent number: 6105667
    Abstract: An air conditioning apparatus for a vehicle seat includes a seat blower unit disposed in a lower side of the seat, and a seat duct for leading air from an air conditioning unit to the seat through the seat blower unit. In the air conditioning apparatus, it can be determined that heat load of a passenger compartment is decreased to a predetermined value based on an operation state of a unit blower of the air conditioning unit, and the seat blower is stopped when the heat load is decreased to the predetermined value. Further, the seat blower is turned on or off according to the heat load of the passenger compartment, so that temperature of the seat can be controlled within a predetermined range.
    Type: Grant
    Filed: March 2, 1999
    Date of Patent: August 22, 2000
    Assignee: Denso Corporation
    Inventors: Takeshi Yoshinori, Shinji Aoki, Hajime Ito
  • Patent number: 6102114
    Abstract: A multi-room air conditioning system includes an outdoor unit and a plurality of indoor units connected in parallel to the outdoor unit. A compressor frequency and combustion control calculator reads a load level for each indoor unit from a load coefficient table using a differential temperature calculated by a differential temperature calculator and a rated capacity stored in a rated capacity memory. The compressor frequency and combustion control calculator then multiplies a sum of the load levels by a predetermined constant and adds a compensation value thereto to obtain a frequency value. This value is used to control the compressor. The compressor frequency and combustion control calculator also sets a target combustion level using the frequency value for control of a refrigerant heater mounted in the outdoor unit.
    Type: Grant
    Filed: September 29, 1998
    Date of Patent: August 15, 2000
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Yoshikazu Nishihara, Kuniyasu Uchiyama, Masanori Ogawa, Youji Takanashi, Takahiko Ao, Norimasa Ishikawa
  • Patent number: 6089221
    Abstract: A space heater for heating air from within a room with a heat exchanger connected to a burner and discharging heated air into the room has a room temperature sensor for detecting a room temperature and a controller for controlling the burner with a freeze prevention temperature set to prevent indoor facilities from being frozen. When the detected room temperature drops to or below the freeze prevention temperature, the controller operates the burner and controls the burner with a lower limit for an amount of heat in the burner with which no moisture condensation occurs in the heat exchanger.
    Type: Grant
    Filed: July 2, 1999
    Date of Patent: July 18, 2000
    Assignee: Rinnai Kabushiki Kaisha
    Inventors: Hiroshi Mano, Shigeaki Yasui
  • Patent number: 6082625
    Abstract: A supplementary vehicle heater is provided which includes a bumer, a heat exchanger, a coolant conduit connected to the heat exchanger and a coolant pump connected to the conduit. There are controls which are operatively connected to the burner and the coolant pump which operate the heater in a first mode when the engine is stopped to preheat the engine or keep the engine warm. The controls operate the heater in a second mode when the engine is running to improve heating of vehicle interior. Preferably the controls include automatic controls which engine coolant temperature. The controls cause the burner and pump to function when the engine is running and the coolant temperature is below preset temperature.
    Type: Grant
    Filed: December 14, 1998
    Date of Patent: July 4, 2000
    Assignee: Teleflex (Canada) Ltd.
    Inventors: Angelo Faccone, Garry J. Anderson
  • Patent number: 6082626
    Abstract: In a cooling water circuit system, cooling water pumped by a mechanically-driven first water pump circulates in a cooling water circuit, and flows through a radiator and a heater core in parallel in the cooling water circuit. An electrically-driven second water pump is disposed in the cooling water circuit at a position where cooling water to be supplied to the radiator from the first water pump and cooling water to be supplied to the heater core from the first water pump flow together. A check valve is provided in the cooling water circuit in parallel with the second water pump so that cooling water flows in one way from a water suction side of the second water pump toward a discharge side thereof. Thus, when the second water pump is operated, a total amount of cooling water pumped by the first water pump and the second water pump can flow through the radiator and the heater core.
    Type: Grant
    Filed: April 8, 1999
    Date of Patent: July 4, 2000
    Assignee: Denso Corporation
    Inventors: Toshio Morikawa, Yoshimitsu Inoue, Hajime Ito, Hikaru Sugi
  • Patent number: 6073690
    Abstract: A heating system control unit is provided for use with a heating system. The control unit includes a switching element connected to a first temperature switch associated with a first stage heater, a second temperature switch and a second stage heater of the heating system. The switching element is adapted for actuating the second stage heater upon the receipt of the second temperature signal and further continuing the actuation of the second stage heater until the lack of receipt of both the first temperature signal and the second temperature signal. A thermostat on the outdoor coil serves to pass the signal from the second temperature switch only upon a temperature of the outdoor coil being below a predetermined amount of about 25 degrees Fahrenheit.
    Type: Grant
    Filed: August 6, 1998
    Date of Patent: June 13, 2000
    Inventor: Donald R. Raley
  • Patent number: 6073858
    Abstract: A hot-water type heating apparatus includes a heat exchanger and a flow rate control valve for controlling hot water supplied to the heat exchanger. The heat exchanger includes an inlet side tank placed at a lower side, an outlet side tank placed at an upper side, and a core portion disposed between the inlet side tank and the outlet side tank. An inner space of the inlet side tank is partitioned into four spaces. Hot water from a hot water inlet pipe is divided into four flows, and flows into tubes of the core portion after passing through the four spaces. Because hot water from the hot water inlet pipe is compulsorily divided into four flows to pass through the four spaces, it can prevent hot water from mainly flowing through the core portion at a side proximate to the hot water inlet pipe and a hot water outlet pipe.
    Type: Grant
    Filed: May 21, 1998
    Date of Patent: June 13, 2000
    Assignee: Denso Corporation
    Inventors: So Obara, Koichi Ito, Hikaru Sugi
  • Patent number: 6062485
    Abstract: A control unit and a related method of operation for controlling the temperature of the water circulated in the radiant loop of a hydronic heating system. The control unit includes temperature setting dials that can be used to adjusts the reset curve used to determine the desired secondary, radiant loop water temperature. The control unit generates a linear reset curve between two setpoints such that the control unit can calculate a desired secondary loop water temperature based on the reset curve and the present outdoor air temperature. The control unit monitors the temperature of the water returning to the boiler from both the primary loop and the secondary, radiant loop. The control unit monitors the return water temperature over a first interval and, based on the rate of change in the return water temperature, calculates a predicted return water temperature at a second interval in the future.
    Type: Grant
    Filed: April 22, 1998
    Date of Patent: May 16, 2000
    Assignee: Erie Manufacturing Company
    Inventors: Daniel K. Stege, Roger P. Michaud
  • Patent number: 6040561
    Abstract: A control system for an electric or hybrid electric vehicle includes a vehicle system controller and a control circuit having an electric immersion heater. The heater is electrically connected to the vehicle's high voltage bus and is thermally coupled to a coolant loop containing a heater core for the vehicle's climate control system. The system controller responds to cabin heat requests from the climate control system by generating a pulse width modulated signal that is used by the control circuit to operate the heater at a duty cycle appropriate for the amount of cabin heating requested. The control system also uses the heater to dissipate excess energy produced by an auxiliary power unit and to provide electric braking when regenerative braking is not desirable and manual braking is not necessary.
    Type: Grant
    Filed: June 30, 1999
    Date of Patent: March 21, 2000
    Assignee: General Motors Corporation
    Inventor: Balarama Vempaty Murty
  • Patent number: 6032869
    Abstract: When the engine is stopped while the engine is warmed up, the cooling water in the engine stays therein without flowing out of the engine, and the cooling water in the radiator or the bypass passage is used for heating source for the heating operation. In this way, it is possible to heat the passenger compartment continuously even after the engine is stopped and to suppress the temperature of the cooling water from lowering to reduce the emission at restarting of the engine.
    Type: Grant
    Filed: April 2, 1997
    Date of Patent: March 7, 2000
    Assignee: Denso Corporation
    Inventors: Koichi Ito, Yoshihiko Okumura, Yoshimitsu Inoue, Kazutaka Suzuki, Yasutoshi Yamanaka, Yuichi Shirota, Hiroshi Nonoyama, Manabu Miyata, Hikaru Sugi
  • Patent number: 6006997
    Abstract: The invention concerns a heating appliance which is protected against overheating in that the temperature increase during operation of the appliance is monitored. If the temperature increases too rapidly, the heating operation is stopped. According to the invention, temperature increase values are determined in a close chronological succession and/or a mean value is calculated in order to compensate signal noise from the temperature sensor.
    Type: Grant
    Filed: October 29, 1997
    Date of Patent: December 28, 1999
    Assignee: J. Eberspacher GmbH & Co.
    Inventors: Wolfgang Pfister, Jurgen Epple, Stefan Ottenbacher, Andreas Alber
  • Patent number: 5993312
    Abstract: A combine including an improved HVAC control system. The frame of the combine supports an operator cab, a harvesting head and the other operational systems of the combine. The control system includes an operator control and a heat exchanger located in the cab. The control system also includes at least one sensor disposed to sense at least one of an ambient air temperature, a cab air temperature and solar loading, and to produce at least one sensed signal representative thereof. The operator control is configured to produce a set-point signal representative of a desired cab air temperature. An interface circuit is electromagnetically coupled to the valve assembly, the operator control, and the at least one sensor. A cooling coil may also be located in the cab, wherein the interface circuit is electromagnetically coupled to the associated coolant compressor.
    Type: Grant
    Filed: December 22, 1997
    Date of Patent: November 30, 1999
    Assignee: Case Corporation
    Inventors: Dale W. Panoushek, Calvin J. Kraning, Curtis A. Halgrimson, Quentin L. Guhr, Robert D. Doescher, Alan G. Leupold
  • Patent number: 5995889
    Abstract: An automatic vehicle interior temperature control system and control method wherein control system outlet air temperature can be controlled automatically using a processor with stored control algorithms that rely upon data including virtual ambient air temperature and virtual sun load heat flux.
    Type: Grant
    Filed: November 26, 1997
    Date of Patent: November 30, 1999
    Assignee: Nissan Research & Development, Inc.
    Inventor: Ronald S. Eisenhour
  • Patent number: 5975422
    Abstract: The present invention relates to a climatizing arrangement and to a method for controlling a climatizing arrangement, preferably air-conditioning equipment, for adjusting the temperature in the interior (7) of a vehicle, with individual regulation of the temperature of the air to different outlets (5, 6). The climatizing arrangement consists of an air-conducting system (2, 3, 4), a fan (1) for generating an air flow and a heat exchanger (8) for heating the air in cold weather. In warm weather the heat exchanger (8), in this case switched off, is instead utilized to provide flow resistance. The partial air flow to each outlet (5, 6) is then caused to pass through the heat exchanger or to bypass the heat exchanger (8), so that the flow rate is reduced in each air flow. Individual exhaust rates, and thus subjective sense of temperature, is thus obtained for each outlet (5, 6).
    Type: Grant
    Filed: January 11, 1999
    Date of Patent: November 2, 1999
    Assignee: Saab Automobile AB
    Inventor: Jimmy Ordberg
  • Patent number: 5966954
    Abstract: An air conditioning system comprises a heat source side unit adapted to condense and supply a fluid which can change a phase between a gas phase and a liquid phase and a plurality of user side units entirely or mostly disposed below the heat source side unit in terms of number and connected to said heat source side unit by piping so as to establish a circulation of the fluid supplied from said heat source side unit passing through said heat source side unit and said user side units by utilizing the difference in specific gravity between the liquid phase and the gas phase of said liquid so that it can provide a cooling/heating effect regardless of the floors where the user side units are installed and the power consumption rate of the system can be minimized.
    Type: Grant
    Filed: December 3, 1997
    Date of Patent: October 19, 1999
    Assignee: Sanyo Electronic Co., Ltd.
    Inventors: Hidetoshi Arima, Nobuhiro Idei, Masashi Izumi, Akira Hatakeyama, Hiroyuki Takada
  • Patent number: 5954120
    Abstract: According to the present invention, when an air-conditioning clutch of a compressor is set on, even if an improvement of a heating capacity by a viscous heater is required, a viscous clutch is turned off not to transmit a rotational driving force of an engine to a rotor of the viscous heater, and further the rotational driving force of the engine is transmitted to the compressor. In this way, a torque applied to the engine E and the V-belt can be reduced, so that a fuel consumption ratio of the engine lowers and a fuel economical performance improves. Further, because an operation of the compressor is intermitted, it is possible to remove a fog of a front windshield, so that a safety of the vehicle travelling can be prevented from being deteriorated.
    Type: Grant
    Filed: September 22, 1997
    Date of Patent: September 21, 1999
    Assignees: Denso Corporation, Toyota Jidosha Kabushiki Kaisha
    Inventors: Shinji Aoki, Toshio Morikawa, Hajime Ito, Yasushi Kato, Goro Uchida
  • Patent number: 5918805
    Abstract: A self-powered, forced hot air space heating system including a boiler for generating steam, a mechanical power producing steam expander, and a heat exchanger for heating air. Steam from the boiler is supplied to the expander and the heat exchanger, which is disposed in close proximity to the boiler. A fan powered by the expander is mounted adjacent to the heat exchanger in order to force air to be heated past the heat exchanger and through the space being heated. By operation of the fan, cool air is forced past the heat exchanger and heated. The resulting warm air is then provided to the space being heated. The system provides central forced hot air heating without the need for any external supply of electrical power. In another embodiment, a hot water heater is used in place of the boiler to heat high pressure water. The high pressure hot water is expanded to obtain mechanical energy for driving a generator and, thereby, producing a supply of electrical power.
    Type: Grant
    Filed: January 14, 1998
    Date of Patent: July 6, 1999
    Assignee: Yankee Scientific, Inc.
    Inventor: Eric C. Guyer
  • Patent number: 5894988
    Abstract: A burner for a vehicle heater of a particle filter regenerator including a combustion air blower, a combustion chamber with a fuel evaporator, a fuel supply with a fuel metering pump by which the fuel is proportionately fed to the evaporator, a glow-plug to ignite a mixture of combustion air and vaporized fuel and a control device, in which the control device switches the flow-plug on to ignite the mixture, starts the fuel metering pump after a first period following the switch-on of the glow-plug and substantially simultaneously with the starting of the fuel metering pump or a second period thereafter initiates a gradual increase in the speed of the combustion gas blower from a standstill or low speed rotation.
    Type: Grant
    Filed: April 16, 1997
    Date of Patent: April 20, 1999
    Assignee: J. Eberspacher GmbH & Co.
    Inventors: Dirk Brenner, Erwin Burner, Jurgen Epple, Stefan Ottenbacher, Jurgen Peschke, Wolfgang Pfister, Monika Sigle, Peter Steiner
  • Patent number: 5878950
    Abstract: A supplementary vehicle heater is provided which includes a burner, a heat exchanger, a coolant conduit connected to the heat exchanger and a coolant pump connected to the conduit. There are controls which are operatively connected to the burner and the coolant pump which operate the heater in a first mode when the engine is stopped to preheat the engine or keep the engine warm. The controls operate the heater in a second mode when the engine is running to improve heating of vehicle interior. Preferably the controls include automatic controls which engine coolant temperature. The controls cause the burner and pump to function when the engine is running and the coolant temperature is below preset temperature.
    Type: Grant
    Filed: July 29, 1996
    Date of Patent: March 9, 1999
    Assignee: Teleflex (Canada) Ltd.
    Inventors: Angelo Faccone, Garry J. Anderson
  • Patent number: 5806763
    Abstract: A thermostat and method for controlling relative humidity is disclosed. The thermostat and method embodied therein controls a heater to maintain the ambient temperature a few degrees above a minimum temperature that is required to prevent condensation, frost and/or freezing. The thermostat controls heater operation from calculated saturation (dew point) temperature values derived from sensed relative humidity and ambient temperature values. The thermostat compensates for sensor non-linearity without the use of additional hardware circuitry or the use of memory intensive lookup tables. In addition, the thermostat of this invention adjusts for the inherent variances in electrical characteristics of the particular sensors used in thermostat circuitry. In one embodiment, the thermostat controls the operation of the heater to maintain the ambient temperature a few degrees above the calculated dew point.
    Type: Grant
    Filed: March 28, 1997
    Date of Patent: September 15, 1998
    Inventor: Thaddeus M. Jones
  • Patent number: 5796332
    Abstract: A diagnostic system for sensing and displaying malfunctions of a heating apparatus installed in a vehicle, wherein the display is effected by a display device of an on-board timer for the heating apparatus.
    Type: Grant
    Filed: April 24, 1997
    Date of Patent: August 18, 1998
    Assignee: J. Eberspacher GmbH & Co.
    Inventor: Edwin Steiert
  • Patent number: 5794845
    Abstract: A plurality of flow control valves is correspondingly provided to a plurality of heater core portions. Each of the flow control valves is provided with a first restriction portion formed in an inlet for receiving hot water, a second restriction portion in an outlet for introducing hot water to the respective heating heat exchange portions, and a bypass opening opened at an intermediate pressure portion between the first restriction portion and the second restriction portion. Each opening area of the first restriction portion, the second restriction portion, and the bypass openings is regulated by a cylindrical valve. The first and second restriction portions, the bypass openings and the valve bodies are accommodated within a common housing, and a bypass passage communicating with the bypass openings is formed in the common housing.
    Type: Grant
    Filed: April 11, 1997
    Date of Patent: August 18, 1998
    Assignee: Denso Corporation
    Inventors: Koichi Ito, Yoshihiko Okumura, Yoshimitsu Inoue
  • Patent number: 5788148
    Abstract: In a vehicle heating appliance, an overhead state is detected by an overheating temperature sensor by means of a microprocessor. The overheating temperature sensor supplies a signal (UTF) to the microprocessor, and when the signal (UTF) exceeds a threshold value, the microprocessor blocks the transmission of driving signals to a driving transistor (Tr) for the fuel dosing pump. A circuit connected in parallel to the microprocessor with a threshold value switch acts as a redundant switching-off device. The output signal of the threshold value switch is applied to an AND-gate whose output is connected to the base of the driving transistor (Tr) and whose other input receives the driving signals from the microprocessor. When the signal UFT exceeds the threshold value of the threshold switch, the AND-gate blocks all signal transmission from the microprocessor to the driving transistor, so that the fuel dosing pump is stopped.
    Type: Grant
    Filed: June 28, 1996
    Date of Patent: August 4, 1998
    Assignee: J. Eberspacher GmbH & Co.
    Inventors: Erwin Burner, Jurgen Epple, Michael Humburg, Johannes Koch
  • Patent number: 5762266
    Abstract: The total flow rate of the hot water flowing to a first heater core and a second heater core is controlled by a total flow rate control valve, and then the flow rate of the hot water to each of the heater cores is distributed by a distribution valve. According to this configuration, the flow rate of the hot water flowing through each of the heater cores is linearly controlled. Therefore, the heating of the driver's seat space by the first heater core and the heating of the air conditioning of the passenger's seat space by the second heater core can be linearly controlled.
    Type: Grant
    Filed: July 8, 1996
    Date of Patent: June 9, 1998
    Assignee: Denso Corporation
    Inventors: Yoshihiko Okumura, Koichi Ito, Yoshimitsu Inoue, Hikaru Sugi
  • Patent number: 5762267
    Abstract: The heating device which can be used for installation in a cabin vehicle of a cabin railway consists essentially of a control means for regulating the interior cabin temperature and a fan device which serves for warming up the interior cabin air and has an air inlet, an air outlet and, arranged between the inlet and the outlet, a heating means for warming up the interior cabin air passed through the fan device. In a preferred embodiment of the invention, in particular the fan device and the heating means are arranged in a box which is provided, on each of two opposite end walls, with an air passage member intended for circulation of the interior cabin air and connected to the air inlet or air outlet. For example, this box is dimensioned and can be inserted into a frame opening of the inner base of the cabin in such a way that the stated air passage members project above the inner base of the cabin in the attached state.
    Type: Grant
    Filed: August 19, 1996
    Date of Patent: June 9, 1998
    Assignee: CWA-Constructions S.A.
    Inventor: Georges Riser
  • Patent number: 5749516
    Abstract: An engine-independent vehicle heating appliance has a combustion air fan, a fuel dosing pump and a heat exchanger that surrounds the combustion chamber, as well as a controller that controls the operation of the vehicle heating appliance. In compact designs, special measures are required to protect the electronic components of the controller from overheating. In order to carry off heat in an effective manner, the controller has a heat conducting plate upon which the electronic power components (18) are mounted, their connections being electrically connected to the wiring on the board (16). Loss heat that results from the operation of the components (18) is carried away by the material of the heat conducting plate (8a, 8b) to the fan housing (6). Since the latter is always cool a sufficient cooling of the components (18) is ensured.
    Type: Grant
    Filed: June 3, 1996
    Date of Patent: May 12, 1998
    Assignee: J. Eberspacher GmbH & Co.
    Inventor: Michael Humburg
  • Patent number: 5743466
    Abstract: A heat exchanger (1) acting in the manner of a radiator can be thermally coupled with a first heat source (internal combustion engine 2) and/or with a second heat source (burner 3 which can be operated independently from the internal combustion engine) via a fluidic heat carrier circuit, especially a water circuit. In addition to other parameters, the temperature of the first heat source can also be taken into account in the control of the heat carrier circuit by thermal setting elements (13).
    Type: Grant
    Filed: November 30, 1995
    Date of Patent: April 28, 1998
    Assignee: J. Eberspacher GmbH & Co.
    Inventor: Michael Humburg
  • Patent number: 5730356
    Abstract: A system and method for recovering heat from waste fluids and gases and for improving the combustion of hydrocarbon fuels and the heat transfer within a boiler. The system comprises a controller, a distribution manifold, a plurality of heat recovery modules and a plurality of magnetic ionization modules. The system possesses the ability to monitor heated water demands within a building and to response by matching the demands with the most cost effective heated water supply source. The plurality of the heat recovery modules includes a flue heat recovery module, a waste water heat recovery module and a cooker heat recovery module for the recovery of heat from waste gases or liquids. The plurality of magnetic ionization modules includes a fuel magnetic ionization module and a water magnetic ionization module for charging fuel molecules to effect a more complete and efficient combustion and for charging the mineral molecules in water to prevent crystallization respectively.
    Type: Grant
    Filed: August 1, 1995
    Date of Patent: March 24, 1998
    Inventor: Stephen Francis Mongan
  • Patent number: 5718375
    Abstract: An auxiliary motor vehicle heating system that supplements the motor vehicle's main heating system. The auxiliary motor vehicle heating system is not dependent upon the same heat energy source as the motor vehicle's main heating system. Consequently, the auxiliary heating system can provide heat when the main heating system is not able to provide heat. This permits the auxiliary motor vehicle heating system to operate and provide heat when the main motor vehicle heating system is not capable of providing heat. Consequently, this invention provides the capability for the windshield and other glass areas of the vehicle to be cleared and heat provided to the occupants of the vehicle even when the motor vehicle engine is not operating and warm. In one embodiment, the heating system is also capable of providing cooling air for cooling as an alternative to heat.
    Type: Grant
    Filed: May 10, 1996
    Date of Patent: February 17, 1998
    Inventor: Frank J. Gerard
  • Patent number: 5699960
    Abstract: An air conditioner for a vehicle which prevents backflow of outside air into a vehicle interior. An inside/outside air switching damper of the air conditioner for a vehicle is connected to a servo motor by a link. Due to driving of the servo motor, the inside/outside air switching damper swings between an inside air position, at which the inside/outside air switching damper closes an inside air passage side opening, and an outside air position, at which the inside/outside air switching damper closes an inside air suction opening. The servo motor is connected to an amplifier for control. An inside/outside air mode switch, a blowout opening mode switch, a vehicle speed sensor, and a blower voltage detecting circuit are connected to the amplifier for control.
    Type: Grant
    Filed: March 19, 1996
    Date of Patent: December 23, 1997
    Assignees: Nippondenso Co., Ltd., Toyota Jidosha Kabushiki Kaisha
    Inventors: Yasushi Kato, Goro Uchida, Yukio Uemura
  • Patent number: 5678760
    Abstract: A cooling system for an electric automobile is characterized in that a heat source is forcibly cooled with a coolant of non-freeze solution, forcibly recirculated through a pipe.
    Type: Grant
    Filed: September 29, 1993
    Date of Patent: October 21, 1997
    Assignees: Hitachi, Ltd., Hitachi Automotive Engineering Co., Ltd.
    Inventors: Masanori Muso, Keiji Oda, Osamu Koizumi, Hiroshi Hamano
  • Patent number: 5538472
    Abstract: A combine including an improved HVAC control system is disclosed herein. The frame of the combine supports an operator cab, a harvesting head and the other operational systems of the combine. The control system includes an operator control located at the roof of the cab and a heat exchanger located at the floor of the cab. An interface circuit is electrically coupled to the control circuit and the heat exchanger valve to control the amount of heat output by the heat exchanger. A cooling coil may also be located at the floor of the cab, wherein the control and interface circuit cooperate to control the associated coolant compressor.
    Type: Grant
    Filed: October 26, 1994
    Date of Patent: July 23, 1996
    Assignee: Case Corporation
    Inventors: Dale W. Panoushek, Calvin J. Kraning
  • Patent number: 5497941
    Abstract: A vehicle is provided with both an electric motor and an internal combustion engine for operating the vehicle. The vehicle is further provided with a duct for discharging air into a cabin of the vehicle for controlling the temperature of the air as discharged. A heater core is arranged in the duct for heating the air passing through the duct. A sensor 9 is provided for detection of the temperature of the cooling water of the engine. When the vehicle is operated by the electric motor, the heat taken from the engine cooling water is supplied to the heat exchanger for heating the air passing through the duct when the temperature of the engine cooling water is higher than a predetermined value.
    Type: Grant
    Filed: February 2, 1994
    Date of Patent: March 12, 1996
    Assignee: Nippondenso Co., Ltd.
    Inventors: Shigeo Numazawa, Takahisa Suzuki
  • Patent number: 5494097
    Abstract: A method and device is provided for regulating or controlling the temperature of an interior, especially for a motor vehicle. An interior temperature regulation mode is provided if an interior temperature sensor and a blowing-out temperature sensor have been connected such that they can operate. A blowing-out temperature regulation mode is provided if only the blowing-out temperature sensor has been connected such that it can operate. Or, a reversionary control mode is provided if no temperature sensor which can operate is present, for which purpose a control and regulating device is correspondingly configured. The control and regulating device can be used for various types of vehicles. A blowing-out temperature regulation mode is also implemented if an open roof is identified in the case of a convertible vehicle.
    Type: Grant
    Filed: September 27, 1994
    Date of Patent: February 27, 1996
    Assignee: Mercedes-Benz AG
    Inventors: Wolfgang Straub, Dieter Heinle
  • Patent number: 5456408
    Abstract: A motor vehicle heating device which is operable independent of an engine of the motor vehicle and has a burner, a pump or other fuel delivery device for supplying fuel to the burner and an electric motor driven blower by which combustion air is delivered to the burner. In contrast to conventional heating devices in which the fuel-air ratio is set and corrected via a mechanically adjustable bypass screw on the combustion air blower, according to a preferred embodiment of the invention, a correction value is sent to a control device which contains a nonvolatile data storage and a microprocessor; the correction value is stored in the data storage and changes the output signals of the control device to the fuel feed means and/or to the combustion air blower. Thus, adjustment and correction are easily enabled via an electronic change of the speed or cycle frequency of these assemblies, so that mechanical adjustment devices can be omitted.
    Type: Grant
    Filed: March 31, 1994
    Date of Patent: October 10, 1995
    Assignee: Webasto Thermosysteme GmbH
    Inventor: Josef Appel
  • Patent number: 5407130
    Abstract: A vehicle heating system for use with an engine having a liquid cooling circuit in which a heat storage battery stores latent heat during the operation of the engine, and the latent heat is later used to supply heat to the engine and the passenger compartment heating system during a subsequent use of the vehicle. A bypass circuit is provided within the heating system for bypassing the heat storage battery, whereby recharging of the heat storage battery is prevented until after the engine of the vehicle has reached a desired operating temperature.
    Type: Grant
    Filed: July 20, 1993
    Date of Patent: April 18, 1995
    Assignee: Honda Giken Kogyo Kabushiki Kaisha
    Inventors: Robert M. Uyeki, Junichi Kanemaru
  • Patent number: 5366151
    Abstract: An apparatus is disclosed for heating the interior of a motor vehicle capable of being powered by electricity or a liquid fuel. A canister stores vapors released from a vehicle fuel tank, and a heater in communication with the canister burns the vapors stored therein to generate heated exhaust gases. Coolant is circulated between a heating coil where the coolant absorbs heat from the heated exhaust gases and a heater core where at least a portion of the heat absorbed by the coolant is transmitted to the interior of the vehicle. A system controller receives a first input indicating a demand for heat in the interior of the vehicle, a second input indicating the state of charge of an electrical storage battery, and a third input indicating a time interval since the canister was previously purged.
    Type: Grant
    Filed: December 27, 1993
    Date of Patent: November 22, 1994
    Assignee: Ford Motor Company
    Inventors: Edward T. King, Larry R. Brandenburg
  • Patent number: 5366150
    Abstract: In an automotive heating system, an engine coolant circuit for circulating engine coolant through an engine of a vehicle is provided with a heat exchanger for transferring heat between the engine coolant and air, and a heat accumulator which stores heat of the engine coolant. The engine coolant circuit has a first coolant circulating path through which the engine coolant from the engine passes the heat accumulator and the heat exchanger in this order and a second coolant circulating path through which the engine coolant from the engine passes the heat exchanger and the heat accumulator in this order. The engine coolant is caused to circulate through the first coolant circulating path when the temperature of heat stored in the heat accumulator is higher than the temperature of the engine coolant while heating is required and through the second coolant circulating path when the former temperature is lower than the latter temperature while heating is required.
    Type: Grant
    Filed: November 17, 1993
    Date of Patent: November 22, 1994
    Assignee: Mazda Motor Corporation
    Inventors: Shinshi Kaimoto, Takahiro Sato, Hiroshi Hamamoto, Masanori Ishikawa
  • Patent number: 5361865
    Abstract: In a motor vehicle having equipment parts in the front-occupant area which can be adjusted on separate sides, two operating modes are possible. In a conventional operating mode, the adjusting of the equipment parts on the front passenger's side takes place individually corresponding to the front passenger's presettings. In the other operating mode, the adjusting of the equipment parts on the front passenger's side takes place synchronously with the adjustment of the equipment parts on the driver's side corresponding to the driver's presettings. The selection of the two operating modes takes place automatically or arbitrarily.
    Type: Grant
    Filed: July 27, 1993
    Date of Patent: November 8, 1994
    Assignee: Bayerische Motoren Werke AG
    Inventor: Thomas Lindner
  • Patent number: 5350114
    Abstract: A diesel heater includes a combustion chamber and a fuel pump for pumping diesel fuel to the combustion chamber. An air supply device supplies combustion air to the combustion chamber. An igniter ignites the diesel fuel to generate combustion heat. A heat exchange fluid supplying device supplies fluid in heat exchange relationship with the combustion heat. A thermal sensor in contact with the heat exchange fluid generates a temperature signal related to the temperature of the heat exchange fluid. A flame detector detects an ignited diesel fuel flame and generates a flame signal in response thereto. A microprocessor includes a memory and a plurality of input/output ports wherein the input/output ports are electrically connected to the thermal sensor, the fuel pump, the heat transfer fluid supplying device, the igniter, the combustion air supply device, and the flame detector. The memory stores a normal operating sequence, a start-up sequence, and a tail start period for the start-up sequence.
    Type: Grant
    Filed: July 21, 1993
    Date of Patent: September 27, 1994
    Assignee: The Budd Company
    Inventors: Kirk A. Nelson, William A. Byrnes
  • Patent number: 5293928
    Abstract: An automobile air-conditioner wherein a controlled variable used to determine the control mode of a component of the air-conditioner is corrected or restricted according to the amount of shifting of the head part setting temperature for driving the component of the air-conditioner based on the corrected or restricted controlled variable. With this arrangement, an occupant of the automobile senses an enhanced change of the air-conditioning operation when the head part setting temperature is changed.
    Type: Grant
    Filed: June 4, 1993
    Date of Patent: March 15, 1994
    Assignees: Zexel Corporation, Mazda Motor Corporation
    Inventors: Katsumi Iida, Yoshihiko Sakurai, Akihiko Takano, Hideo Yamaguchi, Teruaki Yano
  • Patent number: 5294050
    Abstract: A universally installable climate control system for aftermarket installation in a motor vehicle which includes a heater valve which is controlled by the system and is connected in the supply line to the heater core of the originally installed heater/air conditioner. Additionally, a closed loop climate control system is employed which renders the system transparent to the type of motor vehicle in which it is installed, since the closed loop system ensures that a desired passenger compartment temperature is achieved substantially independent of the operating characteristics of the motor vehicle.
    Type: Grant
    Filed: September 4, 1992
    Date of Patent: March 15, 1994
    Assignee: Interdynamics, Inc.
    Inventors: Jonathan H. Hoffman, Gilbert I. Starr
  • Patent number: 5285963
    Abstract: A control system for heating or cooling equipment prior to startup. A temperature sensor senses the temperature of equipment whose temperature is to be controlled. Using an input device, the user of the invention may provide input parameters such as the equipment's expected start time, the size of the equipment, and the rating of the heating or cooling device(s) to be used. A computer utilizes the input parameters and the temperature of the equipment to calculate an activation time at which the heating or cooling device(s) should begin heating or cooling the equipment to provide the equipment with a desired temperature at the expected start time. At the activation time, the computer provides an initiation signal, which causes the heating or cooling device(s) to begin heating or cooling the equipment. In a more specific embodiment, the invention may be utilized to efficiently preheat an engine in frigid conditions by selectively applying power to one or more heaters.
    Type: Grant
    Filed: April 29, 1993
    Date of Patent: February 15, 1994
    Assignee: LLR Technologies, Inc.
    Inventors: Thomas L. Wakefield, George R. Plunkett