Abstract: Disclosed is a vehicle air conditioning system including not less than two evaporators 3, 4, in which internal heat exchangers 5, 6 are provided to the respective evaporator 3, 4, a first evaporator 3 is placed in a front part of a compartment 8A whereas a second evaporator 4 is placed in a rear part of the compartment 8B; and the second evaporator 4 is connected to the internal heat exchanger 6 extended from the engine room 7 to the compartment 8. The internal heat exchanger 6 has a triple tube structure in which a heat insulator 15 is provided between a high-pressure medium passage 13 and a low-pressure medium passage 14.

Abstract: Disclosed is a vehicle air conditioning system including not less than two evaporators 3, 4, in which internal heat exchangers 5, 6 are provided to the respective evaporator 3, 4; a first evaporator 3 is placed in a front part of a compartment 8A whereas a second evaporator 4 is placed in a rear part of the compartment 8B; and the second evaporator 4 is connected to the internal heat exchanger 6 extended from the engine room 7 to the compartment 8. The internal heat exchanger 6 has a triple tube structure in which a heat insulator 15 is provided between a high-pressure medium passage 13 and a low-pressure medium passage 14.

Abstract: Provided are a heat-pump cooler (A) having a first circulation channel (1) and a heater circulator (B) having a second circulation channel (8). A water-cooling condenser (3) in the first circulation channel (1) is placed in the second circulation channel (8), and causes the first coolant to release its heat to the second coolant. The second circulation channel (8) includes a passage switching valve (14) for switching the passage between a passage passing a radiator (10) and a radiator bypass passage (13). During a heating operation, the passage switching valve (14) causes the second coolant to flow into the radiator bypass passage (13), and the air heated by a heater core (12) is introduced as air-conditioned air into the vehicle cabin. During a cooling operation, the passage switching valve (14) causes the second coolant to flow into the radiator (10), and the air cooled by an evaporator (6) is introduced as air-conditioned air into the vehicle cabin.

Abstract: An air conditioning system includes an air-cooling unit and an air-heating unit. On a first path in the cooling-unit, provided are a compressor for first refrigerant, a condenser for the first refrigerant, an expansion unit for the first refrigerant, and an evaporator to cool air. On a second path in the air-heating unit, provided are an air-conditioning radiator for second refrigerant, and a first valve for the second refrigerant (whether or not into the air-conditioning radiator) On a third path in the air-heating unit, provided are a driving-system heating element to heat third refrigerant, an internal heat exchanger to heat the third refrigerant, a heater core to heat air, a driving-system radiator for the third refrigerant, and a second valve for the third refrigerant (whether or not into the driving-system radiator). The air passing through the evaporator or the heater core is selectably sent into a vehicle compartment.

Abstract: An air conditioning system includes a heat-pump type cooling unit and an air-heating unit. On a first circulation path in the cooling unit, provided are a gas-liquid separator provided between an expansion valve and an evaporator for separating refrigerant supplied from the expansion valve into refrigerant gas and refrigerant liquid and sending the refrigerant liquid to the evaporator, a bypass path for flowing the refrigerant gas through the first circulation path with bypassing the evaporator, and a changeover valve for preventing the refrigerant liquid from flowing into the evaporator. In warming-up mode, only the refrigerant gas is circulated in a refrigeration cycle. According to the system, air-heating can be achieved by driving the cooling unit even under a condition where outside temperature is very low.

Abstract: A heat exchanger 10 cools an air-conditioning refrigerant by means of cooling air. The heat exchanger 10 includes a first heat exchanger core 20 and a second heat exchanger core 30 placed forward and backward with respect to a flowing direction of the cooling air 60. The heat exchanger 10 further includes a first header tank 40 that is provided in a lower portion of the heat exchanger, and has two independent tank portions 43 and 44, one of the two tank portions located on a leeward side of the cooling air 60 being in communication with a refrigerant-inlet side of the second heat exchanger core 30, and the other one of the tank portions located on a windward side being in communication of a refrigerant-outlet side of the first heat exchanger core 20, the first header tank 40 introducing the refrigerant from the tank portion 43 located on the leeward side, and discharging the refrigerant from the tank portion 44 located on the windward side.

Abstract: In a vehicular air conditioner which controls an output refrigerant pressure of a radiator by adjusting a decompression amount in an expansion valve, an air conditioning ECU calculates a target refrigerant pressure using a refrigerant temperature detected by a temperature sensor, a vehicle speed detected by a vehicle speed detector, and a control equation defined for calculating the target refrigerant pressure, and adjusts an opening of an expansion valve by a decompression amount corresponding to the target refrigerant pressure.

Abstract: A compressor compresses a refrigerant. A radiator cools the refrigerant compressed by the compressor. An expansion valve receives the refrigerant from the radiator to depressurize and expand the refrigerant. An evaporator evaporates the refrigerant expanded by the expansion valve to cool air passing through the evaporator. An accumulator receives the refrigerant from the evaporator to separate the refrigerant into a gas-phase refrigerant and a liquid-phase refrigerant. The accumulator includes an insertion portion inserted in the accumulator and included in a pipe arranged from the radiator to the expansion valve for exchanging heat between a refrigerant flowing through the insertion portion and at least the liquid-phase refrigerant in the accumulator.

Abstract: A heat exchanger includes a plurality of tubes, a pair of header pipes, partition walls, an inlet connector block and an outlet connector block. The plurality of tubes have one ends connected to one header pipe and other ends connected to the other header pipe. The header pipe internally has a pipe-inside flow-through bore. The partition wall is internally formed in each header pipe to divide the pipe-inside flow-through bore into two regions. Each header pipe has a block connector bore opening at an outer side wall opposing to an area to which the tubes are connected and opening to the pipe-inside flow-though bore by cutting out a portion of the partition wall. The inlet connector block is connected to the block connector bore of one header pipe to admit coolant to flow in. The outlet connector block is connected to the block connector bore of the other header pipe to permit coolant to flow out.

Abstract: A heat exchanger includes a header pipe, an inlet manifold, an outlet manifold, and coupling members. The header pipe includes a fluid circulation hole inside. The inlet manifold supplies a fluid to the fluid circulation hole of the header pipe. The outlet manifold discharges the fluid from the fluid circulation hole of the header pipe. The header pipe is connected to the inlet manifold and the outlet manifold though the coupling members.

Abstract: A heat exchanger includes a header pipe, an inlet manifold, an outlet manifold, and coupling members. The header pipe includes a fluid circulation hole inside. The inlet manifold supplied a fluid to the fluid circulation hole of the header pipe. The outlet manifold discharges the fluid from the fluid circulation hole of the header pipe. The header pipe is connected to the inlet manifold and the outlet manifold though the coupling members.

Abstract: A heat exchanger includes a plurality of tubes, a pair of header pipes, partition walls, an inlet connector block and an outlet connector block. The plurality of tubes have one ends connected to one header pipe and other ends connected to the other header pipe. The header pipe internally has a pipe-inside flow-through bore. The partition wall is internally formed in each header pipe to divide the pipe-inside flow-through bore into two regions. Each header pipe has a block connector bore opening at an outer side wall opposing to an area to which the tubes are connected and opening to the pipe-inside flow-though bore by cutting out a portion of the partition wall. The inlet connector block is connected to the block connector bore of one header pipe to admit coolant to flow in. The outlet connector block is connected to the block connector bore of the other header pipe to permit coolant to flow out.

Abstract: A cooling cycle with a high-pressure side operating in a supercritical area of refrigerant includes a temperature sensor for sensing a temperature of cooled refrigerant between a gas cooler and an internal heat exchanger, a pressure sensor for sensing a pressure of cooled refrigerant between the two, and a controller for controlling at least one of a compressor and a throttling device in accordance with the sensed temperature and the sensed pressure.

Abstract: A cooling cycle with a high-pressure side operating in a supercritical area of refrigerant includes a temperature sensor for sensing a temperature of cooled refrigerant between a gas cooler and an internal heat exchanger, a pressure sensor for sensing a pressure of cooled refrigerant between the two, and a controller for controlling at least one of a compressor and a throttling device in accordance with the sensed temperature and the sensed pressure.

Abstract: A heat pump type air conditioning system comprises an air duct in which air flows in a given direction with an aid of an electric air blower. A condenser is disposed in the air duct. A compressor has an outlet connected to an inlet of the condenser. A receiver dryer has an inlet connected to an outlet of the condenser. An outside expansion valve has an inlet connected to an outlet of the receiver dryer through a first passage. An outside evaporator has both an inlet connected to an outlet of the outside expansion valve and an outlet connected to an inlet of the compressor through a second passage. An inside evaporator is disposed in the air duct at a position upstream of the condenser. An inside expansion valve has both an inlet connected to the first passage and an outlet connected to an inlet of the inside evaporator.