Abstract: A system that allows fresh air to be brought into a furnace as part of the return air circuit. This not only helps to replace stale air within a home, it also provides adequate air supplies to establish enough positive pressure within the dwelling to prevent air infiltration around windows, doors, forced air registers and around room perimeters of rooms along the baseboards. The system consists of a furnace that has a return air supply duct, an intake louver and filter for bringing fresh air into the system, an intake fan mounted to the intake, an intake duct that brings the fresh air from the intake louver to the furnace and a motorized damper, installed in the intake duct, to control the flow or air. These components are controlled by a control panel that works with the thermostat and furnace controls to operate the intake fan and damper as for optimum operation.

Abstract: A personal dryer capable of expelling temperatured air uniformly throughout the dryer and/or different temperatured air at different regions of the dryer, so as to provide a user with the option of drying their entire body with a more desirable uniformly temperatured air and/or drying different bodily regions with different or varied, user-selectable temperatured air, and wherein such a personal dryer is capable of being pre-programmed to enable a user to dry his/her body in a user-specified regimen or manner.

Abstract: A method and system for controlling atmospheric conditions within a building. A conditioned fluid is supplied inside of the building and one or more atmospheric parameters in various locations inside of the building are sensed. An empirical atmospheric map is then generated and compared to a template atmospheric map. Pattern differentials are identified therebetween and corrective action to reduce the pattern differentials is determined. One or more of the quantity, quality, and distribution of the conditioned fluid is varied in accord with the corrective action determination.

Abstract: An air blending apparatus having a housing with at least two air inlet chambers having air flow proportioning means controlling the intake flow of separate return and fresh air streams, an air blending chamber receiving the air streams and being constructed and arranged for intimately intermixing and blending these air streams, and air moving means for distributing the blended air through an air handler system to an enclosed building space.

Abstract: An air conditioning apparatus for an automotive vehicle includes a heater core and a mix door assembly installed in a case. The mix door assembly is detachably installed in the case through an opening formed at a side wall of the case. The mix door assembly constitutes a housing, a mix door and a slide mechanism. The slide mechanism is arranged to slide the mix door according to a received rotational force so as to vary the ratio of warm air to quantity and cool air quantity.

Abstract: A method of controlling the mixing of outside air and return air, entering an air handling unit, through inlets having dampers, the air handling unit having a coil for conditioning the incoming air and a fan for blowing the conditioned air into a conditioned space, the method including measuring the outside air temperature, and return air temperature, and a minimum coil temperature corresponding to a damper position calculating a correlation values from the outside air, return air, and a minimum temperatures determining a correlation function from the correlation value and damper positions, and using the correlation function to calculate the maximum damper position for an acceptable coil temperature.

Abstract: A heating, ventilation, and air conditioning system for a vehicle including a front HVAC control system that communicates with a rear HVAC control system. The rear HVAC control system includes a control panel having mode, temperature, and blower speed controls. The front HVAC control system includes a control panel having a rear manual control switch for enabling/disabling manual control of the rear HVAC system via the rear HVAC control panel. A microprocessor communicates control information from the front HVAC control system to the rear HVAC control system regardless of the position of the rear manual control switch. Whether the supplied control information is used by the rear HVAC control system is determined by the rear manual switch.

Abstract: The flow air from a hot air duct and a cold air duct into a zone of a building is controlled in based upon performing a thermal energy balance calculation for the zone. That calculation produces a heat transfer setpoint from which a hot air flow setpoint and a cold air flow setpoint are derived. The hot and cold air flow setpoints respectively control the flow of air through the hot and cold air ducts.

Abstract: A temperature control device for a constant temperature chiller unit or a vending machine is provided. Thermal medium fluid such as water in the chiller unit is accurately controlled under starting mode, heating mode and cooling mode. Thermal medium fluid such as air in the vending machine is conveniently controlled in winter mode and summer mode. In the device, a heat exchanger is interposed within a compression circuit, and a bypass circuit is disposed at the downstream side of a pump so that through the bypass circuit thermal medium fluid receives heat from the heat exchanger.

Abstract: An air conditioning device has a controller, a fan motor, a by-path strangler, and a heat exchange pipe. The fan motor is disposed in front of the heat exchange pipe. The by-path strangler is disposed between the fan motor and the heat exchange pipe. The controller controls the by-path strangler. The controller has a central processing unit, an output control unit, a detect unit, and a sensor. The sensor senses an environmental detect value to the detect unit. The detect unit outputs the environmental detect value to the central processing unit. The central processing unit outputs a signal to the output control unit. The output control unit has a plurality of output junctions connected to a loading unit. The loading unit has a drive motor and two electric valves.

Abstract: Temperatures in a Dr side air-conditioning zone and a Pa side air-conditioning zone are controlled highly independently of each other without temperature interference between each zone. A room internal air temperature sensor and a room external air temperature sensor are provided. Dr side and Pa side temperature setters separately set room setpoint temperatures (Tset(Dr), Tset(Pa)) in each zone. First and second target blow-out temperature calculating portions, which include neural network, input the room setpoint temperatures and the temperature data. Then it calculates Dr side and Pa side target blow-out temperatures (TAO(Dr), TAO(Pa)) relative to each air-conditioning zones by using a neural network. Air-mixing doors separately adjusts the temperatures of conditioned air blown out from Dr side air passage and Pa side air passage to be the first and second target blow-out temperatures. Here, the neural network has the learning function, which adjusts its output to be desired data (teacher signal).

Abstract: A vehicle air-conditioning device with a rear air-conditioning unit does not having a temperature control device, yet prevents excessive hot air blow temperatures when the fan blow is low. A heat exchanger for heating the air blow from the blower is installed in the case of the air-conditioning unit at the rear of a dual air-conditioning type vehicle air-conditioning device along with a cooling air bypass path to allow cool air to bypass the heat exchanger. A cool air bypass door is installed in the cool air bypass path to open and close it as needed. When the blower is set in low speed mode and hot air heated by the heat exchanger is blown out from the blow path in foot mode, the cool air bypass door is set to a position to open the cool air bypass path in a process that mixes cool air and warm air in the blow path and lowers the temperature of the hot air.

Abstract: There is disclosed a system and method for preventing fogging of the windows of an automotive vehicle. The system and method operate the air conditioning system of the vehicle at temperatures where a high degree of probability of fogging exists. The method includes the steps of measuring the ambient temperature, the evaporator core temperature and operating the air conditioning compressor at specific duty cycles depending upon these temperatures. The duty cycle will be determined based upon these temperature variables as well as the relative humidity within the passenger cabin of the vehicle.

Abstract: In building environmental control, primary HVAC services are distributed to multiple terminal units. An active diffuser terminal unit has a variable speed fan to controllably draw room air into the unit for reheating the air; and, conversely, to force conditioned air down into the space for cooling by reversing the direction of the fan motor. Variation of the fan speed serves to modulate the airflow direction mix through a combination of a vertical port and a horizontal port. This closed system avoids filtering plenum air, and reduces cost by supporting both heating and cooling services with a single fan.

Abstract: A heating or air conditioning unit for the interior of vehicles with air outlets, which are disposed in the center plane of the interior of the vehicle, particularly in the dashboard and which include at least one centrally disposed center vent and two side vents, and with a control unit with adjusting elements for influencing the air emerging from the air outlets is provided. For the purpose of adjusting the division of air between the at least one center vent and the two side vents in the driver's side and the front seat passenger's side of the interior of the vehicle from the driver's seat, two air ducts, each leading to one of the side vents, branch off from the air duct leading to the at least one center vent and, at each branching site, an air splitter is disposed, which is controlled from an air distribution adjusting element, which is disposed in a control panel of the control unit, which is usually placed centrally in the dashboard in the interior of the vehicle.

Abstract: An air-mix door control device for an automobile air-conditioning system home-position-sets the air-mix door for the full-hot position or the full-cool position when it is necessary to control an air-mix door for a new target opening position other than a full-hot position or a full-cool position under a condition that an opening position detecting unit for detecting an opening position of the air-mix door causes a trouble. Also, the air-mix door control device calculates a reverse drive time required for reversely driving the air-mix door from the home-position-set position to the new target opening position so as to correct a time error derived from a torque variation of an air-mix door motor actuator due to a battery voltage. Thus, the air-mix door control device reversely drives the air-mix door according to the reverse drive time and controls the air-mix door for the new target opening position.

Abstract: A system and method for automatically controlling cabin air temperature T.sub.CBN in an aircraft having a cabin and a mixed air delivery system. The mixed air delivery system provides a flow of mixed air having an actual mixed air temperature into the cabin. The mixed air delivery system comprises a hot bleed air sub-system for providing a flow of hot bleed air, a cool air sub-system for providing a flow of cool air, and an ambient air sub-system for providing a flow of ambient air. The method comprises the steps of defining a selected cabin air temperature T.sub.CBN SEL, and then controlling the flow of hot bleed air, the flow of cool air, and the flow of ambient air such that the mixed air temperature is driven toward a target mixed air temperature defined as k(T.sub.CBN SEL -T.sub.CBN)+T.sub.CBN SEL, wherein k is a gain factor.

Abstract: In a system and method for conditioning air in a vehicle, it is determined whether an inside air temperature detected by an inside air temperature sensor is stable, an outside air temperature is estimated based on the inside air temperature only when the inside air temperature is stable, a target conditioned air temperature is calculated using an estimated outside air temperature as well as the estimation of outside air temperature is repeated, and the estimated outside air temperature used for the calculation of the target conditioned air temperature is renewed only when the estimated outside air temperature is different from a prior estimated outside air temperature by a value more than a predetermined value. The outside air temperature is adequately estimated without providing an outside air temperature sensor. Consequently, a desirable air conditioning for vehicles may be performed simply and inexpensively.

Abstract: In the air conditioning apparatus, the air conditioning amplifier unit e is connected to the plurality of door actuators through a single communication line and a single power source line, and also there is provided a fan motor maximum voltage limit control means which not only can create a communication signal to be transmitted through the single communication line in the form of two-way signals including a transmission signal containing door target stop position data to be transmitted to the door actuators, and a response signal to be sent back from the door actuators, but also, when the door target stop position data transmitted last time is different from the door target stop position data transmitted this time, can exert a maximum voltage limit on a fan motor, and, when the signal to be sent back from the door actuators, to the air conditioning amplifier unit is a control end signal which indicates that the door position reaches the target position and the door control is ended, can remove the exertion o

Abstract: Control parameter (target opening) Xm is stored in a memory and the Xm value stored in the memory is used instead of a PBR value to calculate a deviation S value by a conventional control system. Change amount .DELTA.Xm of a first-order lag is found in response to the S value and the Xm value is corrected. The corrected Xm value is stored in the memory to update the memory contents and is transmitted to an air mix door actuator as a command value.

Abstract: A method is provided for reducing vapor generation in a temperature controlled fuel tank in a motor vehicle. The method cooperates with an apparatus having hot and cold fluid sources (20, 22), a heat exchanger (18) having hot and cold valves (26, 24) and an air blower (28) to force temperature conditioned discharge air flow onto a fuel tank (12). The method involves comparing actual and desired fuel temperature signals and producing a first error signal from the comparison. The method then produces a gain signal in response to an operating mode signal and the error signal. A first control signal is then generated in response to the first error signal representing the difference between a desired fuel temperature and the actual fuel temperature. Finally, the heat exchanger is actuated by supplying the first control signal to the cold and hot valves.

Abstract: An apparatus for controlling the temperature of fuel in a motor vehicle fuel tank is described. The apparatus includes a cold valve (24) fluidly interposed between a cold fluid source (20) and a cooling portion (50) of a heat exchanger (18) and a hot valve (26) fluidly interposed between a hot fluid source (22) and a heating portion (48) of the heat exchanger (18). An air blower (28) forces air through an air duct (30) fluidly interposed between the heat exchanger (18) and an air outlet (32) to be discharged onto the vehicle fuel tank (12). A fuel temperature sensor (40) measures the temperature of the fuel in the fuel tank and generates a first input signal which is communicated to a controller (34) which then generates a control signal. The controller communicates the control signal to the cold and hot valves, whereby the cold and hot valves respond so as to maintain the difference between the first input signal and a predetermined fuel temperature profile within a predetermined range.

Abstract: A semi-automatic temperature control (SATC) device for controlling a heating, ventilation and air conditioning (HVAC) system includes a microprocessor operative to receive a plurality of inputs, and control air discharge temperature and blower speed based on the plurality of inputs. The SATC device further includes a switch for controlling the direction of air flow in the cabin of an automotive vehicle independent of the control provided by the microprocessor.

Abstract: An air-conditioner amplifying means and a plural number of door actuators are connected by a single communication line, which transmits target stop-position data of the individual doors in accordance with predetermined locations. Target door opening-degree determining means determines whether the door is to be opened or closed depending on a positive or negative value of the temperature deviation, and judges a value of the temperature deviation in two or larger decision regions in determining the present door opening degree, wherein as temperature to which the decision region is applied for deciding the temperature deviation is large, a value of a fixed opening degree to be added to and subtracted from the preceding target door opening degree is larger.

Abstract: A control system of automotive air conditioning device comprises a heater/cooler unit having therein a plurality of control doors by which various air flow modes are provided. A plurality of identical actuators are employed for actuating the control doors. Each actuator includes an electric motor for driving the corresponding control door, a position detector for issuing a current position signal representative of the current angular position assumed by the corresponding control door, and a control circuit for controlling the electric motor by processing both the current position signal as well as a target position signal applied thereto. A control unit is further employed for totally controlling the actuators by means of a multiplex communication carried out between the control unit and each of the actuators. The control unit issues the target position signal to each of the actuators.

Abstract: The present invention relates to a dual duct control system for use in an environmental control system. The dual duct control system is preferably utilized in a dual duct VAV box. The control system advantageously receives room temperature values, mixed air flow values, and positions the actuators in response to temperature values and flow values. The dual duct control system preferably executes a shower algorithm implemented in software to position the actuators. The shower algorithm provides a scheme for incrementally adjusting the hot and cold air flow setpoints for the VAV box so the internal environment reaches a comfortable temperature within a minimum amount of time.

Abstract: A VAV air conditioning system has a micro-computer control device, a main fan motor, a by-pass fan motor, a heat exchange pipe assembly. The micro-computer control device has a function setting unit, temperature detecting units, a central processing unit and an output control unit and a power supply unit. A control circuit is used to control the main fan motor to supply air led through the heat exchange pipe assembly in accordance with a loading requirement in a closed space so that the temperature thereof can be precisely controlled. As a conditioning loading is lowered, the control circuit can make the main fan motor slow down so as to reduce the supply of conditioned air volume, causing a decrease of main air supply. In the meanwhile, the control circuit outputs another power variable signal to a by-pass fan motor which can produce air supply led directly into the closed space without going through the heat exchange pipe assembly.

Abstract: An air circulation system is used to control the temperature in an area defined by a series of zones. The system has a hot deck and a cold deck, and a series of ducts each extending from the downstream side of the decks to a respective zone. A damper in each duct controls the amount of air entering the duct from each deck. The zone having the highest heat load and the zone having the lowest heat load are empirically determined, and a sensor is installed in each of those zones to monitor temperature. A temperature deviation in those zones from a temperature initially set into the system causes the duct dampers to those zones to adjust, and may also cause heat to be supplied or withdrawn from the decks. Each of the remaining zones normally has a temperature between those of the highest and lowest heat load zones.

Abstract: A method and apparatus for controlling a temperature in a refrigerating chamber of a refrigerator by sensing the temperature of cold-air by firsh and second temperature sensors disposed in the vicinity of cold-air suction and in feed ports, and finely adjusting the suction and feeding of the cold-air by fans disposed in the ports and dampers disposed in the suction port and a cold-air feed passage according to the sensed temperature conditions, whereby local over-refrigeration and cold-air drift phenomena developed in the refrigerating chamber are prevented and the temperature in the chamber is uniformly controlled.

Abstract: A dual-duct HVAC system for providing a desired comfort level in a room, includes a controller that carries out a simple operation that determines the total open damper positions for dual dampers in a dual duct system to effect a desired air flow. Using the total open damper position information as damper control information, the controller also determines a relative damper position difference required between the two dampers to effect a desired temperature level while also meeting the air flow requirement as determined from the total open damper position information. The combination of the total open damper position information and the relative damper position difference is used as control information to control both dampers. Preferably, the controller gives priority of air flow control over temperature control by determining a valid damper position difference range for use in conjunction with the total open damper position information.

Abstract: An air conditioning system is provided with indoor and outdoor air. Since the moisture content of the outdoor air is the major factor in determining the resulting humidity of the indoor space to which conditioned air is supplied, outdoor air is cooled to the greatest extent consistent with the total air cooling needed, before cooling is applied to the indoor air. Cooling is provided by a heat exchanger, through which a cooling medium, such as chilled water or a refrigerant, is circulated. Indoor air not cooled by passing through the heat exchanger is directed, by means of a face and bypass damper, through a bypass duct extending around the heat exchanger from an input mixing plenum at the input to the heat exchanger to an output mixing plenum at the output of the heat exchanger. In a first version, a second face and bypass damper is provided to direct air from the input mixing plenum to pass through the heat exchanger or through the bypass duct.

Abstract: A damper position control device for use in an automotive air conditioning system. The damper position control device includes a motor actuator which rotates an air mix damper in forward and reverse directions, an electric power source, and an electric power source switch device. The motor actuator includes a motor, a gear which is operatively connected to the drive shaft of the motor and an air mix damper and which rotates the air mix damper in forward and reverse directions in accordance with the rotations thereof, and a rotation control device including a regulator which governs the upper and lower rotational limits of the drive shaft of motor and gear. The regulator includes at least three fixed contacts each of which is parallel to the others, but has the different length, and a movable contact which is in contact with at least two of the fixed contacts and which cycles along fixed contacts in accordance with the rotations of the drive shaft of motor and gear.

Abstract: A reversible vapour compression refrigeration plant serves as an air conditioner for cooling or as a heat pump for heating. A main stream of inlet air is divided into separate main and bypass streams of air and proportion of flow between the two streams is varied in an inverse ratio so that as flow through the bypass duct increases, flow through the main duct decreases and vice versa. When the plant is used for heating, the main stream is heated by a supply heat exchanger acting as a condenser and when the plant is used as an air conditioner, the supply heat exchanger acts as an evaporator. Also, as an additional alternative, as a desired air space temperature is approached, preferably heat rejected by a condenser in the heating mode, or heat gathered by the evaporator in the cooling mode, is gradually reduced by reducing refrigerant flow therethrough by modulating compressor suction. Full fresh air or full re-circulating air modes, or a combination of mixed and re-circulating air can be used.

Abstract: An air handling system is provided which includes sections for the introduction of outside or ambient air relative to a structure to be mixed with a flow of inside or return air in a flow path in which the resulting mixture is impelled by a fan to be discharged through a plurality of radially disposed vents. The temperatures of the ambient and inside air as well as of the discharge air is converted into signals which are fed into a microprocessor which in turn generates signals to control dampers which in turn controls the rates of flow of inside and outside air into the principal flow path which is controlled by the aforementioned fan which generates a constant rate of flow through the discharge air vents. The temperature of the discharge air is used to control the ratio of the flows of ambient and inside air which collectively constitute the discharge air.

Abstract: A method and apparatus for emulating a perimeter induction unit, in which the perimeter induction unit is replaced by an emulation unit carried in a plenum above the space to be heated or cooled. A temperature sensor is mounted within the space, and a computer provides programmed control, either centrally or locally. The emulation unit is connected to the primary air ducts and secondary liquid source formerly used for the perimeter induction unit. It includes a primary air inlet for accepting and regulating a flow of ventilated, preconditioned primary air from the primary air ducts, and a secondary air inlet for accepting a flow of return air from the space as well as filtering the return air and passing it over a heat exchanger carrying secondary cooling liquid at a preselected temperature. Primary and secondary air is mixed within a mixing chamber and delivered to the space by a blower at a preselected combined air volumetric flow rate.

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.

Abstract: A control for an air treatment unit, such as a space heater having a heat source and an air handler that draws air from outside the space and from within the space in order to form a combined stream of air that is discharged to the space. The control includes a temperature setpoint control adapted to controlling the heating source in order regulate air temperature in the space to a particular air temperature setpoint and a temperature setpoint setback control that is adapted to decreasing the air temperature setpoint to a lower temperature setpoint during periods when it is anticipated that the space will be unoccupied. A differential pressure sensor senses a pressure differential between the space and outside of the space. A pressure control is responsive to the pressure sensor in order to control the proportion of air drawn from outside the space to air drawn from within the space.

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.

Abstract: In a process and apparatus for controlling an interior temperature of a motor vehicle a nominal temperature is set and is used with a sensed interior space temperature to produce a difference value which is fed to a controller (R). The controller produces a controlling value from the difference value which it feeds to an output stage (E) for cyclically and directionally driving a DC motor (M) which adjusts the position of an adjustable member (SG) to influence an amount of heat fed to an interior space (I) of the motor vehicle. A position signal of the adjustable member is measured and fed in a control loop in order to ensure an exact and dependable positioning of the adjustable member, with the positioning signal being formed by measuring and analyzing partial movements of the DC motor through predetermined angles for activations and further rotation of the DC motor.

Abstract: An automotive heater and air conditioning system has multiple zones each supplied by a separate air flow passage serviced by a common blower and common heat exchangers. One of the passages has an adjustable air flow mechanism which bypasses some air from the passage without disturbing the air flow in other passages. A bypass port in the one passage at a point near the blower outlet is controlled by an adjustable door which is pivotally mounted in the passage at the downstream edge of the port. An induction housing receives air from the bypass port and returned it to the intake if the blower.

Abstract: An automatic air conditioner for an automotive vehicle is arranged to be controlled by a control system and comprised of a heater unit disposed within an air conditioner duct to heat air inducted through an air inlet. A bypass air passage is provided to fluidly connect a first duct part upstream of the heater unit and a second duct part downstream of the heater unit, so that cool air can be introduced to the second duct part immediately upstream of an air outlet having a plurality of outlet openings. The bypass air passage is closable with a door movably disposed in the bypass air passage. The door is closed in response to a closing command generated by a manual switch. The control system is adapted to close the bypass air passage regardless of generation of the closing command when at least an air outlet for air-conditioning a passenger compartment is selected, thereby preventing temperatures of air streams blown out through a plurality of outlet openings of the air outlet from becoming nonuniform.

Abstract: An automobile air conditioning system has a bypass air passage for directing air, before it is heated, to a car interior via a vent outlet. A bypass door is disposed in the bypass air passage, which has an opening which is automatically controlled according to a desired air conditioning temperature in an automatic air conditioning mode. The bypass door control can be intentionally changed to a mild control mode, in which the opening of the bypass door is automatically controlled to become smaller as the temperature of air, which either is in the bypass passage or is to be introduced into the bypass passage, becomes lower in a predetermined range of temperatures.

Abstract: Audio noise created by trim valves (66a-72a) in a warm air trim system (24) of an air cycle air conditioning system (10) is reduced by controlling the pressure drop across the trim valves as a function of the position of the valves (66a-72a). A proportional valve (112) typically under the control of an electronic controller (116) is controlled to set the pressure drop across the trim valves. Reducing the pressure drop across the trim valves, reduces the noise created by air flowing through the trim valves thereby reducing noise in an aircraft cabin.

Abstract: The air handling apparatus provides a separate heating mixing air deck and a separate cooling mixing air deck each with their own return air and outdoor air supplies to maximize indoor air directed to the heating deck and monitor the cooling deck to utilize either return or outside air for greatest efficiency in the cooling deck. Near the rooms serviced by the system the air from the respective heating and cooling decks is mixed and directed through a control plate which can accommodate various filters including a germicide type. The control plate also has a bypass door allowing the filter to be bypassed if desired.

Abstract: An air-conditioning system for motor vehicles having an evaporator and a heat exchanger arranged successively in the air flow. A separate air duct having an air outlet opening for the central jet, is connected on the one hand via a cold-air opening to an air-chamber upstream of the heat exchanger and, on the other hand, via a hot-air opening to an air chamber downstream of the heat exchanger. The cross-section of the bypass openings can be controlled by bypass flaps which are coupled with actuators. A control unit with stored characteristics is provided which indicate the correlation between the air quantity and air temperature of the air issuing at the central jet and the position of the bypass flaps. The control unit applies actuation values to the actuators, which actuation values effect a setting of the bypass flaps redetermined by characteristics for a preselected air quantity and air temperature.

Abstract: An air tempering apparatus for use in an automotive vehicle including a duct having a first passage through which tempered air is discharged into a front compartment portion in front of the front seats and a second passage through which tempered air is discharged into a rear compartment portion in rear of the front seats. A switch is provided for manual operation in the rear compartment portion to generate a command signal to a control unit which thereby controls the amount of tempered air discharged through the second passage into the rear compartment portion.

Abstract: An air conditioning apparatus comprises an automatically controlled mixing box for an air conditioning system wherein a triple inlet mixing box has a cold air inlet, a hot air inlet, a return air inlet, and a fan for inducting and disbursing the air mixed therein. Thermostatic motors regulate the first and second dampers having a configuration which controls opening or closing of the hot air inlet, the return air inlet, and the cold air inlet in such a manner that the air mixture may be regulated from cold to neutral to hot without any direct mixture of the cold air and the hot air at any time. The fan draws in the air from the open or partially open inlet openings to mix the same and discharge the mixture to the room. Several fan-powered mixing boxes may be incorporated to create a multizone system with each zone regulated by a thermostat to mix the return air with hot or cold air to supply the desired zone temperature.

Abstract: In a control apparatus for automobile air-conditioner of the type wherein the air blow-off mode is determined based on the opening of an air-mix door and the substantial temperature of an evaporator for actuating a mode door, the improvement which includes a judgment circuit for making a determination as to whether or not the outside air temperature is lower than a predetermined value in a heat mode operation and whether or not a defrosting operation is needed, and a bleed determination circuit for determining the amount of air bleed needed to be provided to a defrost outlet based on the result of the determination of the judgment circuit and the temperature of an upper part of the vehicle compartment. With this arrangement, the amount of air bleed provided to the defrost outlet can be varied continuously in accordance with the upper-part temperature in a range of between the heat mode and a defrost/heat mode.

Abstract: According to a process of this invention for regulating an interior temperature of a motor vehicle, a nominal temperature is set, an interior space temperature and an exterior temperature are measured, a motor (M) is synchronously controlled for positioning an adjustable control member (L) which influences the amount of heat fed to an interior space (IR), a first cyclical signal is produced which is applied to a second terminal (B2) of the motor and which influences the creation of a second cyclical signal for driving the motor via a comparator (K), a difference signal is produced from the nominal temperature, the interior space temperature, the exterior temperature, and a position signal which with the comparator produce a third cyclical signal from the second cyclical signal and the difference signal that controls the motor via a first terminal (B1) so that an effective motor current corresponds to a difference between the first cyclical signal and the third cyclical signal.

Abstract: Improved air-conditioning of the rear-seat area of a motor vehicle is achieved substantially independently from the front-seat area in a heating or air-conditioning system having means for controlling the temperature of the supply air via a front-seat control unit by employing a front air flap with a cool air passage at the inlet of a heat exchanger. A front-seat air-mix chamber is connected with a rear-seat air-mix chamber having a rear-seat area duct, a rear-seat foot duct, and a rear-seat air-mix flap with a cool air passage therethrough to control the proportion of cool and warm air entering the ducts. Cool air is provided from the inlet side of a heat exchanger flowing through the cool air passage in the front air flap and the cool air passage in the rear-seat air-mix flap while warm air is provided from the outlet of the heat exchanger.