Abstract: The present invention balances power consumption reduction and a cooling in a vehicle air-conditioning system having a compressor selectively driven by a vehicle engine or a motor while the compressor is driven by the motor. At least one of a capacity of a blower and a capacity of a compressor arranged in a refrigeration cycle R while the compressor being driven by a motor is reduced in comparison to the capacity of the blower and the capacity of the compressor while the compressor being driven by a vehicle engine. Furthermore, while a cooling heat load of an evaporator is greater than a predetermined value, the capacity of the compressor is first reduced prior to reducing the capacity of the blower.

Abstract: A compact transport temperature control unit includes an electrically-powered condenser assembly, an electrically-powered evaporator assembly and an electrically-powered compressor. The electrical power is supplied from a source external to the transport temperature control unit.

Abstract: An air conditioning system for use in a motor vehicle powered by an internal combustion engine is described. The system comprises an electric motor powered by a battery; a compressor arranged to be powered by at least one of the internal combustion engine and the electric motor; and a control unit that controls the driving of the compressor. The control unit is configured to execute driving the compressor by only the electric motor when the combustion engine is under an idling stop; restarting the combustion engine upon expiration of a first given time from the time when the idling stop has occurred, so that thereafter the compressor is driven by both the combustion engine and the electric motor; and stopping the driving of the compressor by the electric motor upon expiration of a second given time from the restarting of the combustion engine, so that thereafter the compressor is driven by only the combustion engine.

Abstract: An engine control apparatus of a vehicle having an air conditioner that has a variable displacement compressor is disclosed. The pressure difference between two points in a refrigeration circuit is monitored. The pressure difference represents the compressor displacement. The compressor is controlled by a control valve. The control valve operates based on the pressure difference. A controller compares the temperature of the passenger compartment with a temperature setting. If they differ, the controller determines a target pressure difference for the control valve. The controller computes the compressor torque based on the target pressure difference signal. The controller determines a target engine torque based on the compressor torque and controls the engine based on the target engine torque.

Abstract: An air conditioner for a vehicle having an engine that serves as a drive source for a compressor arranged in a rear part of the vehicle. The air conditioner includes the compressor, and further includes an air intake unit having an inside air intake, an outside air intake, an inside air/outside air changeover damper, and a blower disposed on a downstream side of the inside air/outside air changeover damper. The air conditioner includes an air conditioning unit into which air is introduced from the air intake unit, provided along an introduced air distribution path with a cooling apparatus heat exchanger fluidly connected to the compressor and configured to exchange heat between the introduced air and air outside the cabin interior, where the cooling apparatus heat exchanger is located in the rear part of the vehicle. The air conditioning unit also include an engine heat exchanger configured to exchange heat between the introduced air and an engine of the vehicle.

Abstract: A process and method for monitoring and selectively controlling the capacity and operating conditions of a refrigeration unit is disclosed. Specifically, the present invention includes the adjustment of the electronic expansion valve, and the compressor cylinder banks through the adjustment of desired superheat levels in order to bring a transport refrigeration unit within desired operating conditions.

Abstract: The present invention provides for a transport refrigeration unit of the type configured to be mounted on the front wall of a transport trailer. The transport trailer is adapted to be connected to and towed by a motorized tractor. The connected trailer and tractor define between them a predetermined envelope bounded by the tractor swing radius and the trailer front wall. The refrigeration unit includes a structural support framework configured to be attached to the front wall of the trailer. An outer cover is configured to be supported by the framework and to be within the predetermined envelope.

Abstract: A drive for the compressor of a vehicle air conditioner has a magnetic clutch for mechanically driving the compressor shaft within a predetermined range of torque and a rotatable input element on the magnetic clutch to be rotated by the vehicle motor at varying speeds with changes in the vehicle motor's speed. The drive includes a first electromagnetic element on the rotatable input element and a compressor shaft on the output side of the magnetic clutch for supplying torque to drive the compressor. Also, there is a second electromagnetic element on the compressor shaft with a magnetic field between the first and second electromagnetic elements to rotate the compressor. An electric control is provided for varying the electrical power to the electromagnetic clutch as the vehicle motor changes speed to vary the magnetic field and torque being applied to rotate the compressor shaft.

Abstract: A very efficient direct current mobile air conditioning unit suitable for use with vehicles and capable of extended periods of operation while powered by a 12 volt battery is described. The direct current mobile air conditioning unit comprises at least one oil-less compressor and condenser coils and evaporator coils wrapped in metal gauze, where air is moved across the evaporator coil and condenser unit by highly efficient axial fans.

Abstract: An air-conditioning device includes a control system for saving fuel consumed to drive the device and for enhancing comfortability of passengers at the same time. The air-conditioning device is operated under a cooling mode emphasizing comfortability or under an economy mode emphasizing fuel economy. Under the cooling mode, the device is controlled in a lower temperature range. Under the economy mode, the device is controlled in an intermediate temperature range to secure comfortability when cooling-down is required, and in a higher temperature range to save fuel after the cooling-down has been completed. Information on vehicle speed may be used in the control under the economy mode. The device may be turned off or controlled in a higher temperature range to save fuel, especially when the vehicle comes to a halt.

Abstract: In order to effectively perform on/off control for an air-conditioning system carried on an automobile during idling operation of the automobile, if a state, in which a difference between a target idling number of revolution and a net idling number of revolution is larger than a preset difference value, is continued for a preset period of time, then an electromagnetic clutch is disconnected, and a compressor is allowed to be in an operation stop state. After that, if the difference is smaller than the preset difference value, and a state, in which the difference is smaller than the preset difference value, is continued for a preset period of time, then the electromagnetic clutch is connected, and the compressor is restored to be in an operating state. By doing so, it is possible to previously avoid the occurrence of vibration of the vehicle body due to vibration of the engine, and the occurrence of booming noise in the vehicle's cabin caused by the vibration.

Abstract: An electric power generating system including a motor vehicle defining a passenger compartment and an engine compartment; an internal combustion engine retained in the engine; an exhaust system defining a passage for discharging exhaust gases produced by the internal combustion engine; and a primary heat exchange system coupled to the exhaust system means and defining a primary chamber adapted to transfer thermal energy from the exhaust gases to a working fluid; a cooling system for circulating cooling liquid in a path that results in removal of thermal energy from the internal combustion engine; and an auxiliary heat exchange system coupled to the cooling system and defining an auxiliary chamber adapted to transfer thermal energy from the cooling fluid to the working fluid.

Abstract: The present invention provides a vehicle air conditioning system including a condenser, condenser fan, a variable expansion device, an evaporator, evaporator fan, and a compressor. A processor is provided in cooperation with the compressor for temporarily interrupting compressor operation under certain predetermined operating conditions in order to prevent sticking of the variable expansion device. Various algorithms and initial algorithm engagement parameters are provided for temporarily interrupting compressor operation under certain predetermined operating conditions.

Abstract: A blower means is provided by a cross flow fan 4 in which a plurality of axially extending blades 13 are arranged in rows in a circumferential direction and connected axially with connecting plates 14 interposed therebetween. The cross flow fan 4 is positioned generally horizontal in a widthwise direction of the vehicle. A heat exchanger 2 is disposed on the suction side of the cross flow fan 4 and in the front-and-rear direction of the vehicle, while an air inlet port 6 and an air blowoff port 7 of a casing 1 are opened to the rear parcel panel P. The casing 1 is vertically divided into an upper casing 1a and a lower casing 1b by a plane containing a rotating shaft 5 of the cross flow fan 4. An air passage from the air inlet port 6 to the air blowoff port 7 of the casing 1 is formed into a generally U-shape.

Abstract: A control system for the use of the main engine of a vehicle as a heat source in maintaining the temperature of an operator compartment. The system is manually enabled subject to multiple criteria, the temperature in the operator compartment is monitored, and signals for the desired operator compartment temperature within an about plus or minus 10 degrees control range are produced. The main engine of the vehicle is enabled to start and run by all standard safety features and with a fuel flow controlled idle power output. Cycling through the starting and stopping of the engine is accomplished in response only to the temperature monitor signals. Disconnect of the operator compartment temperature control is accomplished manually by the operator, usually by actuating the operator controls.

Abstract: An automotive air conditioner shutoff system that disengages the air conditioner compressor when the value of a parameter indicative of the vehicle's performance is below a certain variable threshold. The threshold varies as a continuous function of accelerator pedal position or throttle valve position. In addition, the air conditioner fan may also be controlled by the air conditioner shutoff system of the present invention. Further, the air conditioner shutoff system of the present invention may act to shut off the air conditioner when the engine is overheated or when the engine has not yet warmed up or stabilized. Additionally, the vehicle operator can modify the value of the variable threshold for the performance indicating parameter, and entirely override the air conditioning shutoff system.

Abstract: The electric motor vehicle of this invention is an electric motor vehicle which is provided with a drive motor (13) driven by electric power from a storage battery (11), an air conditioner (1), and a regenerative brake means which temporarily uses the motor (13) as a generator when decelerating the vehicle to generate regenerative electric power and to charge the storage battery (11). It is further provided with an excess regenerative electric power judging means (18) for judging excess regenerative electrical energy based on regenerative electrical energy by the regenerative brake and allowable regenerative electrical energy of the storage battery at that time, and an electric power distribution means (14) for distributing the excess regenerative electric power based on the excess regenerative electrical energy.

Abstract: A device for air-conditioning the passenger compartment and for cooling the drive system of electric vehicles includes an air-guide duct connected on the inlet and outlet sides to the passenger compartment and having heat exchangers disposed one behind the other therein in the air-flow direction. One of the heat exchangers, which, together with a circulating pump and a cold store, is incorporated within a circuit of a cold-transporting medium. The circuit is run via the evaporator of a refrigeration unit. The other heat exchanger, together with a circulating pump and a heat store, is incorporated within a circuit of a heat-transporting medium. The circuit is run via the drive system of the electric vehicle for vehicle-cooling purposes.

Abstract: When the driver parks a truck for the purpose of sleeping in the cab's bunk space and desires to have the air conditioner operate, fan clutch cycling, which may create objectionable noise that disturbs sleep, is avoided by the inclusion of a branch circuit off of the air conditioner switch that comprises a parking brake switch in series with a relay coil. When the air conditioner is on and the parking brakes are set, this relay coil is energized to open a circuit to the engine fan clutch solenoid, preventing the fan clutch from being disengaged, and thereby keeping the fan in driven relation to the engine crankshaft so that fan clutch cycling does not occur.

Abstract: An electric car air-conditioning apparatus, which is small in size and capable of preventing abnormal heating upon occurrence of a failure and preventing damage when a capacitor is connected with its polarity reversed, provided with a current-conduction detecting device for detecting the operation of current conduction of a current conducting device for charging the capacitor with a current from a battery, and a power breaking device for breaking a current from the battery, wherein a control section actuates the power breaking device to break the current from the battery in the case where the current-conduction detecting device detects the operation of current conduction for a period longer than a predetermined time when the control section is not outputting a control signal for closing a switching device through which power is supplied from the battery to drive a motor-driven compressor, and in the case where the current-conduction detecting device detects the operation of current conduction when the control

Abstract: An electric-vehicle air-conditioning apparatus small in size, simple in construction and high in reliability, which can be used for many types of vehicles, includes a battery, a conducting device connected in series with the battery, a switching device connected in parallel to the conducting device, a capacitor charged from the battery through the conducting device, a device supplied with power from the battery through the switching device for driving an electrically-operated air-conditioning compressor. The conducting device is adapted to charge the capacitor with a constant current.

Abstract: An electric vehicle has an air conditioning system including an evaporator and a condenser arranged in a refrigerant fluid circuit. The evaporator and condenser are used respectively, in summer for cooling and in winter for heating, the air which is delivered into the cabin of the vehicle. For this purpose, the evaporator and condenser are disposed respectively in a first branch and a second branch of the air circuit, with a valve being provided for bringing each of these branches selectively into communication with a cabin air inlet and an evacuation duct for evacuating air to outside the vehicle.

Abstract: An air conditioning apparatus for an automotive vehicle comprises: a compressor (101) driven by an engine (101) for compressing a refrigerant; an evaporator (103) for evaporating the refrigerant compressed by the compressor; engine speed commanding section (104) for outputting a first command signal to drive the engine at a first engine idle speed when the compressor is not actuated and outputting a second command signal to drive the engine at a second engine idle speed higher than the first engine idle speed when the compressor is actuated; an after-evaporator temperature sensor (105) for detecting air temperature Immediately after the evaporator; an external air temperature sensor (106) for detecting external air temperature; and an inhibiting section (107) for inhibiting the engine speed commanding section from outputting the second command signal, when after-evaporator temperature is lower than a predetermined temperature and further external air temperature is lower than another predetermined temperature

Abstract: A heat pump type air conditioner for an automotive vehicle has a compressor to which an outer heat exchanger and a heat-radiating inner heat exchanger are connected through a three-way valve. The heat-radiating inner heat exchanger is connected to a heat-absorbing inner heat exchanger through an expansion valve. The heat-absorbing inner heat exchanger is connected to the compressor. During a cooling operation the three-way valve is set to lead the refrigerant from the compressor to the outer heat exchanger. During a heating operation the three-way valve is set to lead the refrigerant from the compressor to the heat-radiating inner heat exchanger while bypassing the outer heat exchanger.

Abstract: An air conditioning system for a motor crane includes a heating circuit and a refrigerating circuit The heating circuit comprises a hydraulic motor, a hydraulic pump, a radiator and a valve mechanism causing a pressure difference in the hydraulic oil flowing therethrough. The refrigerating circuit includes a compressor connected to the hydraulic motor and a condenser having a fan for forcing air thereover. The heating circuit is at least partially disposed in an air path in which the condenser is disposed. When the hydraulic oil bypasses the valve mechanism, a control device turns the fan on if the refrigerating circuit is not operating, and the temperature of the hydraulic oil sensed by the sensor reaches a predetermined temperature.

Abstract: An air conditioning system is disclosed employing a common plenum in which an evaporator airflow passage is formed through an inner side wall and out through a top wall and a condenser airflow passage is formed through a bottom wall and out through an outer side wall. Dual stage operation is provided by a pair of evaporator coils which are interleaved about a common evaporator core, and by a pair of condenser coils which are interleaved about a common condenser core.

Abstract: An automotive air conditioner which conditions air making use of radiation of heat of a condenser and absorption of heat of an evaporator effectively. The evaporator 207 and the condenser 203 are disposed in a duct 100. A bypass passageway 150 is provided sidewardly of the condenser 203 in the duct 100, and a flow rate of air bypassing the condenser 203 is controlled by pivotal motion of an air mixing damper 154. Another bypass passage is provided sidewardly of the evaporator 207 in the duct 100, and a flow rate of air bypassing the evaporator 207 is controlled by pivotal motion of a bypass damper 159. Air is conditioned to an optimum blown out air temperature by varying the cooling rate at the evaporator 207 and the heating rate at the condenser 203 and is blown out to a room of an automobile from spit holes 141, 142 and 143.

Abstract: A heat pump for a vehicle includes a compressor helically wound with two pairs of concentric tubes forming the condenser and evaporator. One of the tubes of each pair is in fluid communication with glycol solution used as a heat transfer medium, and the other communicates the refrigerant. The first pair of concentric tubes operates as the condenser and produces condensed refrigerant to an expansion device. The evaporator comprises the second pair of concentric tubes and receives the expanded refrigerant for evaporating same. The glycol solution is communicated to air coupled heat exchangers to heat or cool the passenger compartment, depending on the vehicle mode.

Abstract: The potential for leakage of CFCs, HCFCs, HFCs and HCs to the atmosphere as a result of leakage in vehicular refrigeration systems is reduced by employing conduits (42, 58 and 63) of relatively short length to interconnect closely grouped system components including a compressor (38), a condenser (44) and an evaporator (62). The condenser (44) includes a liquid flow path (46) in heat exchange relation with a refrigerant flow path (48) and the same is connected by conduit (52) to heat exchanger (36). The evaporator (62) also includes a liquid flow path (65) in heat exchange relation with a refrigerant flow path (60) and the same is connected by conduits (66, 67) to at least one heat exchanger (68, 69) remote from an engine compartment (22) in which the compressor (38), condenser (44) and evaporator (62) are housed. The close proximity of the components minimizes the charge of refrigerant required and thus reduces the amount of refrigerant that may potentially leak from the system.

Abstract: A user-adjustable control system monitors an electrical signal indicative of manifold pressure in an internal combustion engine that powers a wheeled vehicle. The engine simultaneously powers the drive train of the vehicle and, when a thermostat so dictates, an air conditioning compressor. This system improves vehicle driving performance by selectively restricting the diversion of engine power from the drive train to operate the air conditioning compressor, based on threshold changes in a monitored electrical signal. With electronic circuitry the system selectively disengages power to the compressor when the difference between manifold and atmospheric pressure drops below a preset value. The system includes a transducer connected to provide an electrical output signal that is indicative of pressure changes in the engine manifold. The manifold pressure changes are, in turn, indicative of changes in the engine's load conditions.

Abstract: In an engine idle speed control system associated with an air conditioner provided with an evaporator for evaporating a refrigerant compressed by a compressor actuated or deactuated by an engine near an evaporator freeze limit temperature, the engine idle speed is increased under consideration of thermal load applied to the compressor whenever the compressor is being actuated. The compressor 21 is deactuated when the temperature of air having passed through the evaporator 22 drops below a predetermined value, and actuated when the same temperature rises beyond another higher predetermined value. Whenever the compressor 21 has been deactuated, the time interval between the deactuation and the actuation of the compressor is measured. If the measured time interval is relatively short, since this indicates a relatively high thermal load applied to the compressor, the engine idle speed is increased.

Abstract: A rapid voltage drop due to generator output saturation is prevented by providing a generator output saturation detection means that extracts a generator output saturation detection signal from the collector terminal of the field transistor controlling the excitation current of the automotive generator and measures the duty ratio of the field transistor in the control device to detect saturation of the generator output, and a compressor control means for reducing the speed of the electrical compressor when saturation is detected.

Abstract: A transport refrigeration unit, and method of operating same, with the unit being associated with a vehicle having a drive engine and a cargo space to be conditioned to a predetermined set point temperature. The transport refrigeration unit includes a refrigerant compressor driven directly, or indirectly, by the vehicle engine. Sensors and control determine when the engine may be safely started and stopped under control of the transport refrigeration unit. A comparison between cargo temperature and set point temperature determines when a refrigeration cycle is required to maintain the set point temperature, and when the cargo space temperature is satisfied. The engine is started, when off, when the engine may be safely started and the cargo space requires a refrigeration cycle to maintain the set point temperature. The engine is stopped, when running, when the engine may be safely stopped and the cargo space is satisfied.

Abstract: An automobile air-conditioner capable of controlling the displacement of a compressor in view of the traveling condition and air-conditioning condition of an automobile so as to maintain a pleasant feeling of the air-conditioning and an accelerating ability of the automobile in harmony with each other. The air-conditioner includes an air-conditioning preference judgment device by means of which a normal control of the air-conditioning operation is maintained when the judgment of this judgment means indicates the existence of an air-conditioning preference condition. The air-conditioning is performed in preference to acceleration of the automobile depending on the degree of acceleration of the automobile even when the automobile is accelerated.

Abstract: A transport refrigeration system including a refrigerant compressor which is alternatively driven by an internal combustion engine or an electric induction motor. The transport refrigeration system achieves and maintains a predetermined set point temperature in a served space by heating and cooling cycles. When additional heat is required during a heating cycle while the internal combustion engine is driving the compressor, capacitors are connected across the induction motor, to cause the motor to function as an induction generator and build up an output voltage. The output voltage is monitored, and when it is sufficient to sustain a load, resistors located to aid the heating cycle are connected to receive the output voltage.

Abstract: An air conditioning system for vehicles includes a hydraulic circuit having a hydraulic motor and a radiator and a refrigerating circuit having a compressor connected to the hydraulic motor and an evaporator disposed in an air conditioning air duct. The system includes a first pump supplying oil to the hydraulic motor and a second pump supplying the oil to the radiator disposed in the air conditioning air duct. A clutch controls the connection of the hydraulic motor and the compressor. A valve is provided between the second pump and the radiator for generating a pressure difference in the oil between the entrance and exit sides of the valve in order to raise the temperature of the oil. A switching mechanism switches the flow of the oil between a first pathway where the valve is located and a second pathway.

Abstract: An air conditioning control system for an automotive vehicle having an internal combustion engine. A variable capacity compressor has a pump having displacement thereof variable in response to a change in pressure within a controlled pressure chamber, a communication passage communicating between a low pressure chamber and the controlled pressure chamber, and a valve disposed to vary an opening area of the communication passage. An electromagnetic clutch connects and disconnects the compressor to and from the engine. An evaporator is connected to the compressor. A control unit controls the capacity of the compressor by supplying the valve with control current normally set within a predetermined range, to vary the opening area of the communication passage such that the temperature of outlet air from the evaporator becomes equal to a desired value.

Abstract: Method of cooling electrical components, especially electronic components, involving evacuation of the calories produced by said components (2) to an outside medium (5) via one or more thermal loops, whereby intermediate heat exchange steps are provided totransfer the calories produced by said electrical components directly or indirectly to the liquid coolant of a refrigerating machine,transfer the calories previously yielded to said liquid coolant to said outside medium (5) whose temperature may be higher than or equal to the operating temperature of said electrical components. An application to automotive vehicle-borne electrical components is described.

Abstract: An apparatus for controlling an air conditioning unit for an automotive vehicle includes an air conditioner switch for operating a compressor, engine speed detecting means, engine speed variation rate calculating means, engine speed reducing state determining means, and means for controlling the compressor to hold in an inoperative state even when the air conditioner switch is in a close state.

Abstract: The switching on and switching off of an air conditioner is primarily determined by signals which are supplied by a temperature controller. However, operating conditions are present wherein the temperature controller supplies the signal "on" but that the operation of the air conditioner is nonetheless unwanted so that the torque of the engine can be available for driving the vehicle. The fulfillment of special conditions for switching off and again switching on the air conditioner are therefore investigated when temperature switch-on conditions are fulfilled. According to the method of the invention, the air conditioner is switched off when the accelerator pedal position exceeds a switch-off threshold value and the difference between the actual permissible full-load quantity and the actual correct idle quantity is less than a predetermined minimum difference.

Abstract: An engine control system of an automotive engine cooperates with an engine driven air conditioning system which is restrictively driven when the engine operates in a predetermined operating condition. The engine control system includes a pressure sensor to detect an atmospheric pressure at which the engine operates. The predetermined condition is changed according to the atmospheric pressure.

Abstract: An automotive air conditioner controller for controlling the operation of an automotive air conditioner employing a variable displacement compressor capable of gradually or continuously varying its displacement. While the engine of the automobile is idling, the automotive air conditioner controller adjusts the displacement of the compressor to or near to the maximum, varies desired idling speed of the engine according to required cooling ability, and adjusts the actual idling speed of the engine to the desired idling speed. Thus, the engine operates at an improved fuel consumption rate without reducing the cooling ability of the automotive air conditioner.

Abstract: An improved engine driven air conditioning apparatus for heating and cooling an enclosed space is disclosed. The apparatus includes a compressor linked to a reversing valve. The reversing valve is further linked to a pair of interior heat exchangers disposed in heat exchanging contact with an enclosed space, and a pair of exterior heat exchangers disposed in air passageways linked to the external environment. The reversing valve controls the direction of flow of fluid in the circuit. In one position, fluid flows from the compressor through the reversing valve to the exterior heat exchanger, to the interior heat exchanger and then back to the compressor to cool the enclosed environment. In a second position, the flow is reversed to heat the enclosed environment. The apparatus also includes an engine to drive the compressor, and a cooling circuit associated with the engine. The cooling circuit includes a pair of radiators radiating the heat from the coolant.

Abstract: The heating and cooling of structures is accomplished by driving a compressor of an air conditioning system with an internal combustion engine. The engine also drives an electrical generator to provide electrical power to the various components of the heating and cooling subsystem such as fans, motors, pumps, and controls. A constantly variable transmission apparatus and a differential power transmission are cooperatively connected to the engine to provide substantially constant speed operation of the generator.

Abstract: An apparatus for controlling a displacement changing unit of a variable displacement type refrigerant compressor arranged in a car air-conditioner circuit, including a refrigerant evaporator for cooling air for air-conditioning a compartment of a car, is provided with a temperature detecting device for detecting an actual temperature of the air for air-conditioning the car compartment, a temperature setting switch for setting a desired temperature of the air for air-conditioning the car compartment, a unit for generating an electric signal indicating a change in an operating condition of the air blowing fan of the refrigerant evaporator, a control unit for carrying out a PID control to control the operation of the displacement changing unit of the compressor in response to a difference between the actual and desired temperatures and a signal of a unit for generating an electric signal indicating a change in the operating condition of the air blowing fan, to thereby eliminate the difference between the desired

Abstract: In a control apparatus for automobile air-conditioners including a variable displacement compressor and a fast idling device, the operation of the fast idling device is retarded until a predetermined discharge pressure of the variable displacement compressor is detected by a pressure sensor. With this retarded operation, it is possible to prevent the engine from rotating at an undue speed when the engine is operating under the fast idling mode.

Abstract: A transport apparatus, for hauling data storage media requiring environmental protection to and from a permanent storage site, includes a portable transport module and a transport cart. The transport module includes an insulated housing having guides for receiving shelves adapted to hold motion picture films, audio and video tapes, and photography film and provide ready access to and protection against movement during transit. A thermoelectric heat pump assembly heats or cools the interior of the insulated housing. A temperature sensor and a humidity sensor in the housing produce temperature and humidity measurement signals. Connectors are provided to connect power to the thermoelectric heat pump assembly and to output the temperature and humidity measuring signals. An ancillary power supply and control system are included to operate the transport module when separated from the transport cart.

Abstract: A vehicle air conditioning system is provided with various sensors such as inside and outside temperature sensors, engine coolant temperature sensor, solar radiation sensor and throttle opening sensor, and a control unit for producing one or more control signals to control the position of an air mix door, the speed of a blower and/or a clutch of a compressor, by performing fuzzy inference in response to input signals derived from the sensors.

Abstract: An automobile air conditioner includes a duct interconnecting a blower unit and a temperature control/air distributing unit having a pair of cooling and heating heat exchangers, the duct having a cross-sectional area gradually increasing toward the temperature control/air distributing unit. The air conditioner preferably has a hot/refrigeration compartment juxtaposed with the duct. In a preferred embodiment, the air conditioner includes a hot air control mode door for controlling a stream of hot air flowing from the heating heat exchanger toward an upper air outlet and a lower air outlet.

Abstract: The present invention aims at securing a steady air conditioning capacity regardless of any fluctuation in speed of an engine in a car air conitioning apparatus using the engine as a power source, which comprises a generator driven by a main engine, a compressor provided with a driving motor, a condenser, an expansion means, an evaporator, a condenser blower, an evaporator blower, and a power controlling means for controlling a power generated by the generator and feeding it to the compressor, condenser blower and evaporator blower.