Abstract: A gas-injection type refrigeration-cycle device has heat exchanger where refrigerant extracts waste heat from heating devices. In the refrigeration-cycle device, the mode is changed between where lower-pressure refrigerant extracts heat and where intermediate-pressure refrigerant extracts the heat of the hot water. The lower-pressure refrigerant is drawn into compressor, after heat exchanger is set at the lower-pressure side of the refrigeration cycle. The intermediate-pressure refrigerant is introduced into compressor-gas-injection port, after heat exchanger is set at the intermediate-pressure side of the refrigeration cycle. In another aspect, a defrosting mode of outdoor heat exchanger includes a heating mode, and gas refrigerant discharged from compressor flows through condenser without heat exchange. Thereafter, the flow of the gas refrigerant is divided to two portions, and the gas refrigerant of one portion flows into outdoor heat exchanger, thereby defrosting outdoor heat exchanger.

Abstract: An air-conditioning system is designed at least for an air-conditioning mode for cooling a thermal control medium (13) and a heat-pump mode for heating the thermal control medium. The system comprises a refrigerant circuit with a compressor (1) and an evaporator (8), a coolant circuit with a heat-generating unit (10) to be cooled and a heater (12) for heating the thermal control medium, and also a first refrigerant/coolant heat exchanger (3) functioning on the refrigerant side as a condenser/gas cooler. The evaporator is formed by a second refrigerant/coolant heat exchanger (8). A cooling body (14) for cooling the thermal control medium is connected downstream of heat exchanger (8) on the coolant side.

Abstract: A capacity control device controls a discharge capacity of a variable displacement compressor for use in an automotive air conditioning system. The air conditioning system has the compressor and an evaporator fan. The device includes a control, a first detector, and a second detector. The control changes the discharge capacity of the compressor between a minimum discharge capacity for that compressor and a maximum discharge capacity. The first detector detects an elapsed time of a minimum discharge capacity operation of the compressor. The second detector detects an impressed voltage of the evaporator fan of the air conditioning system. The discharge capacity increases from the minimum discharge capacity to a predetermined discharge capacity when the elapsed time of the minimum discharge capacity operation is greater than a predetermined time and when the impressed voltage of the evaporator fan is greater than a predetermined voltage.

Abstract: A vehicle cooling apparatus having a simple construction that enables the size of a cooling fan electric motor to be reduced without the need to increase the number of batteries provided for driving the motor. The cooling fan provides necessary cooling for an engine radiator and an air-conditioning system condenser by driving the motor at an input power lower than its rated power by a predetermined amount until the temperature of the engine cooling water reaches a predetermined temperature. If the water temperature rises above the predetermined temperature, the electric motor input power is increased to a level greater than its rated input power for a predetermined time period. As a result, cooling capacity can be increased and the water temperature can be lowered with a smaller motor when the water temperature has become abnormally high. Because the electric motor is normally driven at an input power lower than its rated input power, the life of the electric motor is increased.

Abstract: A freezer/refrigerator vehicle equipped with a refrigerating apparatus driven by a drive source which is an engine, mounted on a vehicle, for running the vehicle, comprising an idle-up means for operating a fuel feeding device of the engine under a first idle-up condition or under a second idle-up condition between the first idle-up condition and the no-load condition, and a control means. After the defrosting cycle is conducted for a predetermined period of time while the idle-up means is in operation under the second idle-up condition, the control means operates the idle-up means under the first idle-up condition and thereafter, brings the refrigerating apparatus back to the refrigerating cycle after the passage of a predetermined period of time.

Abstract: It is an improvement of a package-type compressor that is used for the air compression, refrigerating and air conditioning. The compressor is a double scroll compressor that a laps are formed on both sides of an end plate of orbiting scroll. A scroll compressor element is disposed above a motor and a dryer is disposed further above the scroll compressor element. A cooling fan is installed in the motor. A cooler that cools operation gas through the compressor element is disposed above the cooling fan. A partition plate defines a first flow passage for cooling the motor and the compressor element and a second flow passage for cooling the cooler. A first suction port sucking external air to the first and second flow passages is provided on a casing side wall locating in a direction extending from the motor shaft. A suction partitioning plate is attached to a casing side wall opposite to the casing side wall having the first suction port. The second suction port is lower than the first suction port.

Abstract: Air conditioning which is designed to cool a vehicle engine and provide air conditioning inside the vehicle is comprised of a condenser (5) cooled by air (6). The condenser (5) is installed in the vehicle and separated from the vehicle radiator (18) so that hot air coming out from the condenser will not pass over the vehicle radiator. The condenser (5) will be placed in some place other than next to the radiator and a fan (4-A) will be installed to provide it with fresh air. A cold low-pressure suction pipe (20) coming from the evaporator (13) is placed inside the vehicle radiator in an area in which water cooling the radiator accumulates in the radiator. The high pressure liquid pipe (7) is split after the receiver in a way that connects to a pipe (16) leading back to the vehicle radiator and connects to another pipe leading to the evaporator.