Humidity Control Per Se Patents (Class 236/44A)
  • Patent number: 6161765
    Abstract: A protective enclosure for housing heat-generating electronics, having a sorption device for controlling humidity and a heater for heating the sorption device. The invention protects electronics placed within the enclosure from the effects of water vapor and condensation during normal operation and in the event of power loss. The sorption device adsorbs water vapor during normal operation or power loss when the temperature in the enclosure falls below the dew point. The sorption device releases collected water as water vapor when power is restored and the temperature in the enclosure rises above the dew point. The invention thereby prevents failure of the electronics due to condensation build-up and provides for effective long-term use of the sorption device.
    Type: Grant
    Filed: September 30, 1999
    Date of Patent: December 19, 2000
    Assignee: Lucent Technologies, Inc.
    Inventors: Jason Abraham Kay, David Stevens Kerr, John Robert Morris, Jr., Ivan Pawlenko, Richard Franklin Schwartz
  • Patent number: 6145750
    Abstract: An apparatus for ventilating the crawl space of a structure, comprising an exhaust fan adapted to at least partially occlude an aperture in a structure and oriented to, upon receiving an appropriate stumulus, exhaust crawl space air through said aperture to outside the structure, a temperature sensor and a relative humidity sensor for sensing the respective temperatures and relative humidities of crawl space air and of outside air, and for transmitting respective stimulus dependent thereon to a programmed computer, said computer determining the absolute moisture differential therebetween and comparing said differential to a pre-set minimum absolute moisture differential parameter for ventilation activation, said computer also functionally connected to said fan for controlling the activation thereof, said computer also programmed to discriminatorily activate either a humidity decreasing or a humidity increasing mode depending upon a maximum or minimum inside RH parameter, and to deactivate said mode at a break
    Type: Grant
    Filed: September 18, 1998
    Date of Patent: November 14, 2000
    Inventor: Peter W. Carpenter
  • Patent number: 6105875
    Abstract: Outdoor, electronic component containing cabinets are cooled by forced circulation of outside air through the cabinet for direct, cooling contact with the components. The incoming air is filtered, heated as necessary to evaporate water droplets in the air prior to entry of the air into the component containing portions of the cabinet, and the air flow is regulated for slowing the flow rate of the air within the cabinet as is necessary for maintaining the relative humidity within the cabinet below a maximum percentage; typically 40%.
    Type: Grant
    Filed: September 8, 1998
    Date of Patent: August 22, 2000
    Assignee: Lucent Technologies, Inc.
    Inventors: James T. LaGrotta, Richard T. LaGrotta
  • Patent number: 6099404
    Abstract: A process and apparatus for humidification of air in a cabin (4) of an aircraft, wherein a secondary flow of warm air is taken from a primary warm air flow that originates in a turbomachine of the aircraft. This secondary warm air flow is introduced into a boiler (6) enclosing an air/water heat exchanger (17) and at least partially filled with water, so as to form in said boiler a flow of water vapor as a function of the secondary warm air flow. At the outlet of the boiler (6) the flow of water vapor and the flow of secondary warm air are in mixed together and injected into the heating/air conditioning circuit for the air in the cabin (4).
    Type: Grant
    Filed: July 28, 1998
    Date of Patent: August 8, 2000
    Assignee: Liebherr-Aerospace Toulouse S.A.
    Inventors: Laurent Hartenstein, Michel Eglem
  • Patent number: 6059196
    Abstract: A storage system with ambience conditioning facilities includes a desiccator for removing moisture from air and promoting convection, thereby maintaining articles stored therein in an optimum state for a long period of time. The environment maintained has stable humidity, is free of contaminants and suppresses aging of articles by humidity and microbes.
    Type: Grant
    Filed: August 13, 1997
    Date of Patent: May 9, 2000
    Assignee: Kongo Co., Ltd.
    Inventors: Kunio Miyazaki, Tomoyuki Kawano, Ichiro Ikenaga
  • Patent number: 6035649
    Abstract: A method for controlling the evaporator temperature of an air conditioner as a function of the outside dew point, in which the dew point temperature of the intake air drawn in by the air conditioner to air-condition an interior and the blown air temperature setpoint that is associated with one or more variably presettable interior temperature setpoints is determined for the intake air to be blown out into the interior. At the beginning of each cooling cycle, a determination is made as to whether the evaporator is wet or dry. The evaporator temperature is then adjusted to a setpoint that is at most approximately as high as the dew point temperature and otherwise is approximately as high as the blown air temperature setpoint. This is for cases within presettable limits, with a wet evaporator and a blown air temperature setpoint that is above the intake air dew point temperature.
    Type: Grant
    Filed: July 6, 1998
    Date of Patent: March 14, 2000
    Assignee: DaimlerChrysler AG
    Inventors: Wolfgang Straub, Herbert Wieszt
  • Patent number: 6021953
    Abstract: An apparatus which may be used year-round for dehumidifying air in the enclosed space of a building to comfortably allow a higher temperature during summer conditions and for exchanging air in the enclosed space year-round with fresh air to provide a more healthful environment within the building. The apparatus includes a fan mounted on or otherwise adjacent the basement floor or other bottom floor and a conduit connecting the fan outlet to an opening in an outside wall for removing stale relatively damp air from the bottom floor level and discharging it out of the building. Vents as needed are provided in upper floors for circulating relatively dry air downwardly toward the bottom floor. The air extracted is replaced by fresh air through cracks or the like in the building or by an opening provided in an outside wall at an upper level of the building.
    Type: Grant
    Filed: August 22, 1995
    Date of Patent: February 8, 2000
    Inventor: Ross M. Swan
  • Patent number: 5971287
    Abstract: A method and a system for regulating the mixed air in a heating/air-conditioning unit (1) of a motor vehicle in which fresh air and/or recirculated air are fed to a heating/air-conditioning unit (1) which controls the feeding of fresh air and/or recirculated air in the passenger compartment of the vehicle. In a method for optimizing the consumption of energy for such heating/air-conditioning systems, the feed of fresh air and/or recirculated air is so adjusted that the temperature of the dew point of the air within the vehicle is less than the temperature on the inside of a window of the vehicle.
    Type: Grant
    Filed: August 8, 1997
    Date of Patent: October 26, 1999
    Assignee: Max Kammerer GmbH
    Inventors: Detlef Kettner, Gregor Gattnar
  • Patent number: 5938984
    Abstract: A temperature regulating method of a humidifier regulates a temperature of water vapor ejected therefrom according to a surrounding temperature. A cool humidification mode is added to a humidification mode of the humidifier, and a temperature of a humidifying tub is detected upon being shifted into the cool humidification mode by a user. Thus, the detected temperature is compared with a temperature preset for performing the cool humidification mode to turn off the heater when the temperature of the humidifying tub is higher than the preset temperature and, turn on the heater otherwise, thereby regulating the temperature of the water vapor ejected from an ejecting slit of the humidifier according to the surrounding temperature thereof.
    Type: Grant
    Filed: March 31, 1997
    Date of Patent: August 17, 1999
    Assignee: Daewoo Electronics Co., Ltd.
    Inventor: Woong Jung
  • Patent number: 5934987
    Abstract: A device and method for controlling air conduction in a vehicle includes an air conduction element. The air conduction element is controlled as a function of the moisture in the vehicle interior, intermediate positions of the air conduction element being possible between a maximum proportion of circulating air and a maximum proportion of fresh air. In this way, the proportion of fresh air is increased only gradually when there is a high pollution impact if the interior moisture does not exceed a maximum moisture value .PHI..sub.max. Control of the moisture in the vehicle interior increases the comfort of the vehicle occupants. A circulating-air dryer makes it possible, in principle, to continue in circulating-air operation for an unlimited period.
    Type: Grant
    Filed: September 12, 1997
    Date of Patent: August 10, 1999
    Assignee: Behr GmbH & Co.
    Inventors: Wilhelm Baruschke, Alexander Boehlendorf, Markus Flik, Oliver Kaefer, Hans Kampf, Karl Lochmahr, Tilo Rinckleb, Dieter Schmadl
  • Patent number: 5934368
    Abstract: A highly reliable electronic apparatus free from condensation in the cabinet of the apparatus. The electronic apparatus has printed circuit boards on which heat emitting semiconductor devices are mounted and a fan. The electronic apparatus further comprises a hygrometer for measuring the relative humidity and dew-point temperature of the cooling air that is introduced into the cabinet through an opening, a surface temperature sensor for sensing the temperature of the surface of the semiconductor devices, an internal temperature sensor for sensing the internal temperature of the semiconductor device, dehumidifier and heater means made up of a heat pump and an outdoor unit, and a controller for controlling the dehumidifier means and the heater means so that the relative humidity is less than 100% and the dew-point temperature is less than the surface temperature of the semiconductor devices.
    Type: Grant
    Filed: September 19, 1995
    Date of Patent: August 10, 1999
    Assignee: Hitachi, Ltd.
    Inventors: Tetsuya Tanaka, Toshio Hatada, Takayuki Atarashi, Junichi Kobayashi, Akihiro Takanashi, Takahiro Daikoku, Yutaka Watanabe, Shizuo Zushi
  • Patent number: 5918804
    Abstract: In a combination type humidifier having a heater and an ultrasonic vibrator, an art for preventing the ultrasonic vibrator from being thermally damaged due to a heat produced by the heater is disclosed. First, a current humidity of a space, a water temperature of a humidifying chamber and a target humidity set by a user are detected. When the current humidity is higher than the target humidity, a fan motor begins to operate for a rapid heat loss. Otherwise, when the target humidity is higher than the current humidity, an error message concerning the setting of the target humidity is displayed and the fan motor is driven for a predetermined time. The heater is controlled so that the water temperature of the humidifying chamber is kept below the limit temperature by using a result of comparing the water temperature of the humidifying chamber with a limit temperature that is set for protecting the ultrasonic vibrator while the ultrasonic vibrator and the heater are simultaneously operated by a user's selection.
    Type: Grant
    Filed: December 12, 1997
    Date of Patent: July 6, 1999
    Assignee: Daewoo Electronics Co., Ltd.
    Inventor: Woong Jung
  • Patent number: 5887784
    Abstract: An apparatus is disclosed for an improved air conditioning system for admitting air from an exterior space, adjusting the temperature and humidity of the exterior air and delivering the adjusted air to an interior space of a structure. To compare the energy levels of these two air streams an improved device brings both air streams to the same temperature, so just the relative humidity has to be measured to know which of these two air streams has the higher or the lower energy level. Using the device in a control system for a desiccant wheel, at least two temperature sensors are eliminateable.
    Type: Grant
    Filed: July 1, 1997
    Date of Patent: March 30, 1999
    Assignee: Electrowatt Technology Innovation AG
    Inventor: Matthias Haas
  • Patent number: 5881951
    Abstract: An apparatus for ventilating the crawl space of a structure, comprising an exhaust fan in a housing adapted to at least partially occlude an aperture in a foundation wall of a structure and oriented to, upon receiving an appropriate stumulus, exhaust crawl space air through said aperture to outside the structure, a temperature sensor and a relative humidity sensor for sensing the respective temperatures and relative humidities of crawl space air and of outside air, and for transmitting respective stimulus dependent thereon to a programmed computer, said computer also adjusting said relative humidity stimulii for temperature-dependent deviation, then determines the absolute moisture differential from said adjusted stimulii and compares said differential to a pre-set minimum absolute moisture differential parameter for ventilation activation, said computer also functionally connected to said fan for controlling the activation thereof
    Type: Grant
    Filed: September 18, 1997
    Date of Patent: March 16, 1999
    Inventor: Peter W. Carpenter
  • Patent number: 5857616
    Abstract: A system for regulating the amount of fog produced by foggers in a humidification system in which a control signal calling for a certain amount of humidification from foggers is used and wherein the foggers require pressurized air and water to produce fog for an air stream. The pressure differential between the air and water to the foggers is varied according to the amount of required humidification. The pressure differential may be regulated with a pneumatic device or with an electronic control.
    Type: Grant
    Filed: November 7, 1997
    Date of Patent: January 12, 1999
    Assignee: Cool Fog Systems, Inc.
    Inventors: Robert S. Karnoff, Brian J. Early, Albert R. Thierfelder
  • Patent number: 5806762
    Abstract: An atomizing nozzle assembly, comprises a body; a nozzle head secured to the body, the nozzle including a chamber and an orifice for permitting water to flow out; a stem disposed within the chamber, the stem including a tip adapted to slide into or out of the orifice, thereby closing or opening the orifice, respectively; a piston secured to a rear end of the stem, the piston being slidably disposed within a cavity in the body; a spring disposed behind the piston adapted to bias the piston forward such that the tip is disposed within the orifice to close off the orifice when liquid to the nozzle assembly is cut off; a passageway within the body communicating with the chamber and the orifice, the passageway for connecting to a liquid supply to be atomized; and the tip including a resilient tubing adapted to provide a seal against the orifice when the tip is the closed position.
    Type: Grant
    Filed: May 16, 1997
    Date of Patent: September 15, 1998
    Assignee: DGH Systems, L.L.C.
    Inventors: D. Scott Herr, William Kane
  • Patent number: 5722587
    Abstract: Disclosed is a method of controlling a humidifier. The method comprises the steps of recording a humidity of a room, setting a desirable humidity and the operating time by handling a key input section, recording a first present time, recording a second present time when the humidity in the room has reached a predetermined humidity, recording an elapsed time from the first present time to the second present time, comparing the elapsed time with the look-up tables, determining the volume of the room, and operating a vibrator with a predetermined frequency according to the volume of the room. The method make the humidifier supply a proper amount of atomized water into the room in accordance with the volume of the room, thereby providing an optimum humidity in the room.
    Type: Grant
    Filed: September 16, 1996
    Date of Patent: March 3, 1998
    Assignee: Daewoo Electronics Co., Ltd.
    Inventor: Woong Jung
  • Patent number: 5715998
    Abstract: A device for circulating moist air throughout the interior of a humidor. The device includes a housing which has a front surface and a rear surface. A humidity gauge is mounted within the housing. A moisture containing element is also mounted within the housing. Positioned between the rear surface of the housing and the moisture containing element is a fan. The fan is adapted to circulate a stream of air through the moisture containing element, through the front surface of said housing and throughout the interior of the humidor.
    Type: Grant
    Filed: October 17, 1996
    Date of Patent: February 10, 1998
    Inventor: Suleiman S. Sula
  • Patent number: 5697223
    Abstract: A method of control of a car air-conditioner which prevents condensation and fogging on window glass occurring at the initial start of a slow starting heat pump system, without dehumidification by a large amount of ventilation as in the past, by driving an absorbent fan simultaneously with the start of a heating operation by the system so as to remove the moisture from the air in the passenger compartment by a small amount of an absorbent, starting a low level of ventilation when the heat pump system has finished warming up, ending the dehumidification by the absorbent within a relatively short time, and starting the regeneration of the absorbent by supplying power to a heater.
    Type: Grant
    Filed: December 18, 1995
    Date of Patent: December 16, 1997
    Assignees: Nippon Soken, Inc., Nippondenso Co., Ltd.
    Inventors: Hiroki Ishii, Mikio Matsuda, Masaru Tsunokawa, Akihisa Kokubo
  • Patent number: 5695117
    Abstract: An evaporative device for cooling a stream of air for cooling a space into which the air is discharged. The device includes psychrometric sensors installed in the air stream which provide signals to either an analog or a digital microprocessor control device. The stream of air is cooled by one or more mist nozzles in the incoming air stream, the flow of water to which is controlled through analog or digital control devices, enabling cooling of the stream of air to the maximum permitted by psychrometric relationships without unnecessarily high humidity.
    Type: Grant
    Filed: July 20, 1995
    Date of Patent: December 9, 1997
    Inventors: Timothy J. Sizemore, Bryan L. Redd
  • Patent number: 5651262
    Abstract: A humidified cigar showcase is provided having a closed cabinet defining an interior with a plurality of partitions such as shelves or drawers. Moist air is supplied to one side of the interior through a supply plenum and withdrawn from an opposite side through a return plenum, creating a horizontal humid airflow through channels defined between the partitions. The plenums are arranged in a rear wall of the showcase to have an inconspicuous profile and so that the showcase interior may be viewed through windowed side panels. The humidity is maintained with a humidistat which controls a fan. The fan drives the airflow, withdrawing moisture from a water reservoir and delivering the humid airflow through the plenums. Baffles may be provided in the plenums to vent airflow more uniformly along the plenums.
    Type: Grant
    Filed: November 15, 1995
    Date of Patent: July 29, 1997
    Assignee: J. C. Pendergast, Inc.
    Inventor: James C. Pendergast
  • Patent number: 5598971
    Abstract: The present invention provides a capacitive humidity transducer based humidity control system. The present invention comprises a humidity sensor, a temperature source for the heated cabinet air, a temperature source at the sensor, and a regulated water mist discharged into the cabinet air circulation system. An electronic system combines the input from the sensor, the temperature inputs, and the humidity percentage setting to regulate the timing and duration of the water mist discharge, thereby allowing to adjust percentage of humidity in heated holding cabinets. The sensor is a capacitor comprising two plates in close proximity but insulated from each other. The electrical output of the capacitor is sensitive to moisture on the surfaces between the plates. By cooling one plate until it reaches its dew point, the signal is detected and received by the electronic system. Cooling of the capacitor plate is accomplished by means of a thermoelectric cooler.
    Type: Grant
    Filed: August 17, 1995
    Date of Patent: February 4, 1997
    Assignee: Bevles Company, Inc.
    Inventors: Dale E. Winther, Robert H. Killen
  • Patent number: 5563811
    Abstract: A circuit for causing an element to produce a substantially linear response to an input signal comprising an element for providing a response, a transistor oscillator circuit for providing an electrical output signal of variable amplitude to excite the element in response to the input signal, the transistor oscillator circuit normally causing the electrical output signal to vary non-linearly with respect to the input signal, and microprocessor means for correcting the non-linear relationship between the input signal and the electrical output signal to thereby cause the electrical output signal to vary substantially linearly with respect to the input signal when the input signal is applied to the microprocessor means.
    Type: Grant
    Filed: April 29, 1993
    Date of Patent: October 8, 1996
    Assignee: Humonics International Inc.
    Inventor: Cecil W. Embree
  • Patent number: 5528905
    Abstract: A contactor, particularly a vapor exchanger, working by the sorption or desorption of water vapor from or into an air stream (U) by an aqueous hygroscopic solution inside the contactor, is formed by at least a container (1, 1') with membrane walls (101) in contact with the air stream (U) whose air vapor content is to be controlled. The walls (101) of the container (1, 1') in contact with the air stream (U) are provided by many capillary open micropores so as to be impermeable to the solution but sufficiently permeable to the water vapor transfer to/from the solution. A device for handling air, particularly for dehumidification and/or humidification and air conditioning has at least one container (1) in combination with elements (6, 6'; 33, 34, 134) for adjusting the temperatures of the hygroscopic solution and/or of the air streams for controlling the transfer sense and rates of the vapor.
    Type: Grant
    Filed: February 27, 1995
    Date of Patent: June 25, 1996
    Assignee: Essex Invention S.A.
    Inventor: Francesco Scarlatti
  • Patent number: 5520328
    Abstract: A system for providing air quality control for an indoor area divided into a plurality of zones, whereby air quality is controlled both centrally and at each of the zones, including a central controller, a central damper, a supply air stream duct, a return air duct, a plurality of zone controllers, a plurality of zone dampers, a plurality of air quality sensors (i.e., CO.sub.2, volatile organic compounds, humidity, etc. . . ) and a plurality of temperature sensors. A method for providing air quality control for an indoor area divided into a plurality of zones, whereby air quality is controlled both centrally and at each of the zones, including the steps of: reading an output value of an air quality sensor from one of the zones, comparing the output value with a zone maximum threshold value and a zone minimum threshold value, modulating the zone damper to vary a supply air flow into the zone, repeating the first three steps for each zone, determining a predetermined function (i.e.
    Type: Grant
    Filed: November 3, 1994
    Date of Patent: May 28, 1996
    Assignee: Carrier Corporation
    Inventor: Walter E. Bujak, Jr.
  • Patent number: 5507433
    Abstract: A method for adjusting an opening cross section of an air inlet into a premises involves sensing the amount of water vapor contained in the air inside of the premises and the amount of water vapor in the air outside of the premises. The opening cross section is adjusted on the basis of at least one of a difference between the amount of water vapor sensed the inside and outside the premises so that the opening cross section increases when the difference increases and independently of the amount of water vapor in the air outside the premises. A device for adjusting an opening cross section of an air inlet into a premises includes two chambers in communication respectively with the air outside and with the air inside the premises, the chambers being separated from one another by a heat exchanger, which is impervious to water vapor.
    Type: Grant
    Filed: August 8, 1994
    Date of Patent: April 16, 1996
    Assignee: Conseils Etudes et Recherches en Gestion de l'Air (C.E.R.G.A)
    Inventor: Pierre C. J. Jardinier
  • Patent number: 5492273
    Abstract: A system which drives an indoor blower of a heating, ventilating, and/or air conditioning (HVAC) system in response to a system control signal. The system control signal has a BLOWER DEMAND state and a BLOWER END DEMAND state. The system comprises a motor having a stationary assembly and a rotatable assembly. The rotatable assembly is in magnetic coupling relation to the stationary assembly and in driving relation to the indoor blower. The system controls in response to the system control signal the rate of air flow of the HVAC system. The system operates at a first air flow rate in response to the BLOWER DEMAND state of the system control signal and operates at a second air flow rate greater than the first air flow rate when the BLOWER DEMAND state has been present for a first period of time. Alternately, the motor operates at a third air flow rate less than the first air flow rate for a second period of time in response to the BLOWER END DEMAND state of the system control signal.
    Type: Grant
    Filed: December 13, 1994
    Date of Patent: February 20, 1996
    Assignee: General Electric Company
    Inventor: Rajendra K. Shah
  • Patent number: 5463873
    Abstract: A method and apparatus are described to evaporatively cool air leading to a gas turbine engine by injecting water fog into the inlet air in a controlled manner. A signal is generated representative of the capacity of the inlet air stream to absorb water vapor and used to regulate the amount of fog introduced into the inlet air stream.
    Type: Grant
    Filed: December 6, 1993
    Date of Patent: November 7, 1995
    Assignee: Cool Fog Systems, Inc.
    Inventors: Brian J. Early, Daniel J. Reens, Robert S. Karnoff
  • Patent number: 5450893
    Abstract: The present invention provides for a humidistat which can be connected to a humidifier through a thermostat and its existing wiring. The thermostat has a plurality of output leads for a heating signal, a fan signal and/or a cooling signal. The humidistat includes a first input for receiving the heating signal from the thermostat, a sensor associated with the first input for sensing the relative humidity of the air in the enclosed volume, a second input for receiving the cooling signal from the thermostat, and a first switch with a heating position and a cooling position for switching between the first and second inputs, respectively, and an interface module for selectively energizing either a humidifier when the first switch is in the heating position or a cooling system when the first switch is in the cooling position.
    Type: Grant
    Filed: December 13, 1993
    Date of Patent: September 19, 1995
    Assignee: Galmar Enterprises, Inc.
    Inventors: Mark A. Galba, Gus N. Gallas
  • Patent number: 5353862
    Abstract: A humidity control device of an air conditioner having an air conditioner body and being capable of controlling a humidity as well as conditioning air during heating, drying and like operations, comprises a target humidity setting unit for setting a target humidity in accordance with operation modes, a humidity sensor for detecting a humidity in a room, a humidity setting element for setting a humidity in the room, a control unit for comparing the humidity detected by the humidity detecting element with the humidity set by the humidity setting unit and controlling the compared humidity, and a humidifier responsive to the control unit to receive an operation command signal from the control unit in accordance with the detected and set humidities to thereby control the humidity in the room. The humidifier is arranged independently from the air conditioner body and the control unit transmits a humidifier control signal to the humidifier through a wireless transmission.
    Type: Grant
    Filed: June 30, 1993
    Date of Patent: October 11, 1994
    Assignee: Kabushiki Kaisha Toshiba
    Inventor: Kazuhiko Akiyama
  • Patent number: 5346128
    Abstract: A humidity control system for a space receiving conditioned air from a duct has sensors which measure the current humidity in both the space and the duct. The system calculates a duct set point based on the difference between the current space humidity and the humidity set point for the space. The system then controls the humidity of the air passing through the duct so as to both minimize the difference between the space humidity and the humidity set point for the space and to prevent the air in the duct from reaching its dew point. A special algorithm is used to compensate for lag in the duct's humidity sensor.
    Type: Grant
    Filed: July 22, 1993
    Date of Patent: September 13, 1994
    Assignee: Honeywell Inc.
    Inventor: Paul C. Wacker
  • Patent number: 5257735
    Abstract: An automatic room environment controller which avoids the unnecessary improving operation for the room environment, the controller comprising: member for detecting condition of room environment; member for improving means for improving the condition of the room environment; first member for comparing a value of the condition previously detected by the detecting means with a first predetermined value to determine whether operation of the improving means is necessary or not, so that the operation of the improving means is continued until the condition is improved to the first predetermined value when the necessity of the operation of the improving means; second member for comparing a value of the condition detected at present by the detecting means with the previously detected value of the condition to determine whether the condition corresponding to the value detected at present is improved than the condition corresponding to the previously detected value or not, when the condition corresponding to the value d
    Type: Grant
    Filed: September 24, 1992
    Date of Patent: November 2, 1993
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Junichi Takahashi, Hironobu Nakamura
  • Patent number: 5249740
    Abstract: Method and apparatus for regulating the conditioning of a gaseous flow that includes hearing the gas to a desired level and saturating it with a liquid at a reduced pressure and mixing the saturated gas with a second non-saturated gas in proportion to attain a desired conditioning.
    Type: Grant
    Filed: November 25, 1991
    Date of Patent: October 5, 1993
    Assignees: Assoc. de Gestion de L'ecole Francaise de Papeterie et D'Imprimerie, Jean Marie Serra-Tosio, Yves Chave
    Inventors: Jean Marie Serra Tosio, Yves Chave
  • Patent number: 5232152
    Abstract: A kitchen range hood fan electrically connectable to an atmospheric humidity sensor, such as a dehumidistat. The fan motor is automatically activated when atmospheric humidity readings measured within a dwelling exceed a pre-set limit.
    Type: Grant
    Filed: December 8, 1992
    Date of Patent: August 3, 1993
    Inventor: Richard W. B. Tsang
  • Patent number: 5230466
    Abstract: The humidity control apparatus comprising solid absorbers (13a, 13b) and a heater therebetween selects the suitable operation mode among a dehumidification operation, a dehumidification with ventilation operation, a humidification operation and a dehumidification with ventilation operation, in accordance with the detected data of a temperature sensor (17), a moisture sensor (18) and an oxygen sensor (19). The apparatus selects and operates a suitable operation mode by combination of controllings of an intake damper (10) for selecting the inlet air-flow course, an exhaust damper (11) for selecting the outlet air-flow course, the heater (14) for heating the solid adsorbers (13a, 13b), a fan for flowing the air in the solid adsorbers (13a, 13b).
    Type: Grant
    Filed: March 3, 1992
    Date of Patent: July 27, 1993
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Yoshifumi Moriya, Toshiya Fujito
  • Patent number: 5199295
    Abstract: A small moisture addition apparatus which regularly, through use of a counterflow, adds a controlled amount of moisture to a sample gas analyzed by an hygrometer to reduce the response time of the hygrometer and to provide automatic verification that the hygrometer is functioning. A method of using that apparatus is also disclosed. The apparatus and method of the present invention can be applied to gas components other than moisture and to the detectors of such components.
    Type: Grant
    Filed: January 22, 1991
    Date of Patent: April 6, 1993
    Assignee: Meeco, Inc.
    Inventor: Jacob Mettes
  • Patent number: 5163423
    Abstract: A humidifier heats a gas to be supplied to a patient, for example, for anaesthesia in surgical operation or artificial respiration to cure difficulty of breathing, at an appropriate temperature and humidifies the same at an appropriate humidity.
    Type: Grant
    Filed: November 29, 1991
    Date of Patent: November 17, 1992
    Assignee: Origin Medical Instrument Co., Ltd.
    Inventor: Shiro Suzuki
  • Patent number: 5131589
    Abstract: A room humidifier in combination with a source of potable water and a source of heated fluidic material, such as a room hot water radiator, room steam radiator, room baseboard convector, remote steam boiler or remote hot water boiler. Potable water from its source is supplied to cover a heat exchanger in the humidifier to a desired level. Such potable water is heated by the heated fluidic material flowing through the heat exchanger, causing the formation of water vapor which collects within the humidifier. The desired relative humidity in the room is attained and maintained by control means which causes the flow of the heated fluidic material through the heat exchanger to form such water vapor and the control means causes a fan to operate to draw room air through the humidifier to render such room air moisture-laden and to blow such moisture-laden air into the room.
    Type: Grant
    Filed: December 10, 1991
    Date of Patent: July 21, 1992
    Inventor: Gary W. Sherrill
  • Patent number: 5118261
    Abstract: An air conditioning method and apparatus for electrochemically regulating a humidity and an oxygen-concentration within a case by the use of an ion exchanger polymer electrolyte. Where the humidity and the oxygen-concentration within the case are reduced, a cell comprising an anode, a cathode and an anion exchanger polymer electrolyte sandwiched between both the electrodes is arranged so that a surface of the anode is in contact with an atmospheric air outside the case and a surface of the cathode is in contact with an ambient atmosphere inside the case and DC voltage is applied between both the electrodes. On the other hand, where the humidity and the oxygen-concentration within the case are increased, the cell having the similar construction is arranged so that the surface of the anode is in contact with the ambient atmosphere inside the case and the surface of the cathode is in contact with the atmospheric air outside the case and DC voltage is applied between both the electrodes.
    Type: Grant
    Filed: November 16, 1990
    Date of Patent: June 2, 1992
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Shiro Yamauchi, Takeaki Hanada
  • Patent number: 5096549
    Abstract: A dehumidifier for removing moisture from a gas containing moisture comprises a first electrode which is in contact with a gas containing moisture on a first surface thereof and, when a positive voltage is applied thereto, which produces protons from said moisture, a proton conductive solid having first and second portions which is connected to a second surface of the first electrode at the first portion and allows the protons to pass therethrough, and a second electrode which is connected to the second portion of the proton conductive solid on a first surface thereof and in contact with air on a second surface thereof. In a preferred embodiment, the first electrode, the proton conductive solid, and the second electrode are formed as a laminate. When a negative voltage is applied between the first and second electrodes, hydrogen or water is produced from the protons passed through the proton conductive solid.
    Type: Grant
    Filed: July 13, 1990
    Date of Patent: March 17, 1992
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Shiro Yamauchi, Kenichi Mori, Eiichi Nagao, Koichi Hirooka
  • Patent number: 5092520
    Abstract: The invention relates to an air extraction apparatus for conditioning air in an enclosed space wherein the air in said enclosed space is stratified due to a temperature gradient between a ceiling and floor of the enclosed space. The apparatus includes a conduit having an inlet end and an outlet end, the conduit adapted to be arranged and installed with its outlet end in communication with an opening in a wall of the enclosure and its inlet end in proximity to the floor when in use. A fan means is located in the conduit to effect movement of air from the floor level of the enclosure through the inlet end to and outwardly of the outlet end. A control means is attached to the conduit and is associated with the fan means to selectively connect the fan means to a source of power, the control means being responsive to a selected condition e.g. relative humidity of the air in the enclosure.
    Type: Grant
    Filed: November 30, 1990
    Date of Patent: March 3, 1992
    Assignee: Air-Tech Equipment Ltd.
    Inventor: Marc R. Lestage
  • Patent number: 5082173
    Abstract: A dynamic environmental control system for managing the environment in a super insulated tightly sealed home which has a heat recovery ventilator connected to a forced air heating system for ventilation. The system controls indoor temperature, humidity and fresh air levels as well as temperature gradients using a heat recovery ventilator, heater and an air ventilation fan. The system can initiate operation of the heat recovery ventilator to exchange moist and polluted inside air for drier fresher outside air to control both inside moisture and air pollutant levels. Air exchanges can be initiated by an internal system timer, manually by building occupants or by the system in response to humidity levels inside the home. The system will determine the moisture contents of inside and outside air and will only attempt to exchange air to lower inside humidity levels when the outside air contains less moisture than the inside air.
    Type: Grant
    Filed: February 21, 1990
    Date of Patent: January 21, 1992
    Assignee: McMaster University
    Inventors: William F. S. Poehlman, Darel E. Mesher
  • Patent number: 5043143
    Abstract: There is described an analyzer for determining analytes of a body liquid, in which stacks of test elements are stored prior to use. To control the level of humidity in which the stacks are stored, first and second compartments are provided with access openings connecting them to the stack-storage area. A mechanism is provided for selectively closing off and opening up the access openings, and for actively forcing air to flow from either of the compartments into the storage area. One of the compartments has a supply of water, and the other has a desiccant.
    Type: Grant
    Filed: March 28, 1990
    Date of Patent: August 27, 1991
    Assignee: Eastman Kodak Company
    Inventors: James D. Shaw, Martin F. Muszak
  • Patent number: 5033672
    Abstract: An automobile air conditioning device includes a ventilation system with a ventilation fan for discharging air contained in a passenger chamber from the vehicle. A dew condensation detector is adapted to detect a predetermined relative humidity for a dew point at which dew condensation on a rear window glass of the vehicle is presumed to occur. A controller actuates the ventilation system when the dew condensation detector detects the dew point while the vehicle is running.
    Type: Grant
    Filed: June 8, 1990
    Date of Patent: July 23, 1991
    Assignee: Mazda Motor Corporation
    Inventors: Hiroaki Sakamoto, Hiroyuki Sumihara, Shigetoshi Doi, Shinshi Kajimoto
  • Patent number: 4974777
    Abstract: The control system and method of the present invention controls a heat treater receiving wet gas from a pipeline. The heat treater reduces the water content of the gas to provide dry gas to the pipeline. A sensor monitors the wet gas and provides a signal corresponding to the water content of the wet gas. A second sensor monitors the dry gas and provides a signal corresponding to the water content of the dry gas. A difference signal corresponding to the difference between the two water content signals. Apparatus controls the flow of fuel to the heat treater, so as to control the drying process, in accordance with the water content signal of the wet gas and the difference signal.
    Type: Grant
    Filed: September 25, 1989
    Date of Patent: December 4, 1990
    Assignee: Texaco Inc.
    Inventors: Donald J. Dowling, Jackie C. Sims, Albert P. Richter
  • Patent number: 4968457
    Abstract: A non-circulating water system for use in evaporative coolers which incorporates a timing means in conjunction with a valve means, to control the flow of water to the pads. It applies measured amounts of water to the pad and allows measured amounts of time between applications so that most of the water is used in the evaporation process and minimal amounts of water are discharged though a drain. Domestic water line pressure is used to transfer water to the pads, eliminating the need for reservoir water, float valve, pump and overflow pipe. The cycle of the timing means may be varied dependent on moisture or temperature conditions sensed in the pad.
    Type: Grant
    Filed: September 15, 1989
    Date of Patent: November 6, 1990
    Inventor: Gary M. Welch
  • Patent number: 4967728
    Abstract: An apparatus is set forth for humidification of a dwelling wherein a transparent housing includes a valve operative through a solenoid with a flexible input water line directed into the valve and a flexible output line directed from the valve to a spray head. The valve is associated with a humidistat to effect operation of the valve to inject water vapor into a stream of air directed within a central duct work of a furnace arrangement. The spray head includes a horizontal and vertical pivot mount in association with the water input line to enable selective positioning of the nozzle at a desired rotation relative to the air stream within the duct work. Modifications of the instant invention include removable and selectively cleansable sponge coverings for the spray nozzle head.
    Type: Grant
    Filed: December 18, 1989
    Date of Patent: November 6, 1990
    Inventor: Art W. Dueck
  • Patent number: 4953784
    Abstract: A ventilator drive system includes a fan for exhausting an indoor air to the outdoors and introducing an outdoor air to an indoor side, an electric motor for driving the fan, a humidity sensor having a humidity sensing element which abuts against an indoor side surface of a room wall as close as possible or which is located so that heat is transferred from the room wall, and a control circuit for comparing a signal from the humidity sensor with a reference signal. The motor is energized when the relative humidity is increased to a reference level or above.
    Type: Grant
    Filed: April 10, 1989
    Date of Patent: September 4, 1990
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Hitoshi Yasufuku, Toshikazu Ogata
  • Patent number: 4909436
    Abstract: The invention described herein relates to an apparatus for providing a selectively humidified gas to a camera canister (12) containing cameras and film used in space. A source of pressurized gas (leak test gas 26 or motive gas 21) is selected by a valve (30), regulated to a desired pressure by a regulator (34), and routed through an ejector (46) (venturi device). A regulated source of water vapor in the form of steam from a heated reservoir (18) is coupled to a low pressure region (50) of the ejector (46) which mixes with high velocity gas flow through the ejector (46). This mixture is sampled by a dew point sensor (14) to obtain dew point thereof (ratio of water vapor to gas) and the apparatus adjusted by varying gas pressure or water vapor to provide a mixture at a connector (78) having selected humidity content.
    Type: Grant
    Filed: December 12, 1988
    Date of Patent: March 20, 1990
    Assignee: The United States of America as represented by the Administrator of the National Aeronautics and Space Administration
    Inventors: Richard M. Hamner, Janice K. Allen
  • Patent number: 4896589
    Abstract: An air conditioning control system for an automotive vehicle equipped with windowpanes has a humidity sensor for sensing humidity on the inner surface of a windowpane, and a temperature sensor for sensing temperature of the inner surface of the windowpane. When the sensed humidity on the inner surface is higher than a first predetermined value corresponding to the sensed temperature of the inner surface, the inner surface is determined to be in a state immediately before a mist occurs, and demisting control is executed. A second predetermined value lower than the first predetermined value by a predetermined amount is determined after the start of the demisting control. When the sensed latest value of the humidity on the inner surface becomes lower than the second predetermined value, it is determined that the mist has been cleared away, and the demisting conrol is stopped.
    Type: Grant
    Filed: May 18, 1989
    Date of Patent: January 30, 1990
    Assignee: Diesel Kiki Co., Ltd.
    Inventor: Tadahiro Takahashi