摘要:
A refrigerating system, using CO.sub.2 as a refrigerant, for an air conditioner for an automobile. A pressure at the outlet of the heat emitter 2 is controlled to a target value in accordance with the temperature of the refrigerant at the outlet of the heat emitter for obtaining an operation of the refrigerating system along the optimum control line .eta..sub.max. A pressure reducer 4 and a cooler 5 are provided on a branched passageway 28 branched from a refrigerant recirculating passageway 27 for injection. The cooler 5 is for obtaining a heat exchange between a flow of the refrigerant on the branched passageway 28 after being cooled by the pressure reducer and a flow of the refrigerant on the main passageway 27, thereby cooling the refrigerant directed to the evaporator. In a second aspect of the invention, a means is provided for increasing a target value of the pressure at the pressure reducer when a thermal load of the refrigerating system is high. In a third aspect, a series of pressure reducers are arranged on the main recirculating passageway. The second stage pressure reducer is controlled so as to obtain a desired value of degree of super heating at the inlet of the compressor.
摘要:
A cooling system (1) that cools an HV apparatus (31) includes a compressor (12) that circulates a refrigerant, a heat exchanger (14) that performs heat exchange between the refrigerant and outside air, an expansion valve (16) that reduces the pressure of the refrigerant, a heat exchanger (18) that performs heat exchange between the refrigerant and air-conditioning air, a cooling portion (30) that cools the HV apparatus (31) using the refrigerant that flows between the heat exchanger (14) and the expansion valve (16), and a gas accumulator (70) that retains a gas-phase refrigerant gasified by heat exchange with the HV apparatus (31) in the cooling portion (30).
摘要:
A cooling system that cools HV equipment includes a compressor that circulates refrigerant, a condenser that condenses the refrigerant, a gas-liquid separator that stores the refrigerant in liquid form that is condensed by the condenser, an expansion valve that reduces a pressure of the refrigerant, an evaporator that vaporizes the refrigerant that is reduced in pressure by the expansion valve, a first passage and a second passage through which the refrigerant flows from the gas-liquid separator toward the expansion valve, and that are provided in parallel, and a cooling portion that is provided along the second passage and cools the heat source using the refrigerant. The refrigerant in liquid form flows from the gas-liquid separator through the second passage.
摘要:
A selector valve includes: a first valve element having a through-hole; a first housing having a radial hole through which fluid flowing though the through-hole passes, the first housing accommodating the first valve element; a second valve element having a through-hole; a second housing having radial holes through which fluid flowing through the through-hole passes, the second housing accommodating the second valve element; and a motor configured to integrally actuate the first valve element and the second valve element. A hollow space configured to suppress transfer of heat between the first valve element and the second valve element is formed between the first valve element and the second valve element. A hollow space configured to suppress transfer of heat between the first housing and the second housing is formed between the first housing and the second housing.
摘要:
A heat exchange apparatus that exchanges heat between a refrigerant and a temperature-regulated section has: a compressor; a first heat exchanger that exchanges heat between the refrigerant and outside air; a second heat exchanger that exchanges heat between the refrigerant and air for air conditioning; an opening-adjusting valve that adjusts a degree of opening of a path of the refrigerant between the first heat exchanger and the temperature-regulated section; an expansion valve that is disposed in a path of the refrigerant between the temperature-regulated section and the second heat exchanger, and that reduces a pressure of the refrigerant; and an ECU that controls a degree of opening of the opening-adjusting valve. The ECU increases the degree of opening of the opening-adjusting valve to thereby heat the temperature-regulated section, and reduces the degree of opening of the opening-adjusting valve to thereby cool the temperature-regulated section.
摘要:
A cooling system for cooling a heat generation source includes a cooling unit that is configured to cool the heat generation source by a coolant flowing through the cooling unit, a heat exchanger that is configured to perform heat exchange between the coolant and outside air, a liquid storage device that is configured to store the coolant in a liquid state, a first passage for the coolant that connects between the heat exchanger and the liquid storage device, a second passage for the coolant that connects between the liquid storage device and the cooling unit, and that includes a main passage that connects between the liquid storage device and the cooling unit and a sub passage, at least part of which is separate from the main passage, a pump that is provided on the sub passage.
摘要:
A heat exchange apparatus that performs heat exchange between a refrigerant and a temperature-adjusted unit includes: a compressor that circulates the refrigerant; a heat exchanger that performs heat exchange between the refrigerant and outside air; an expansion valve that reduces a pressure of the refrigerant; a heat exchanger that performs heat exchange between the refrigerant and air-conditioning air; a cooling passage that forms a path for the refrigerant to flow between the heat exchanger and the expansion valve; and a heating passage that forms a path for the refrigerant to flow between the expansion valve and the heat exchanger. The temperature-adjusted unit is disposed to be capable of exchanging heat with the refrigerant flowing through the cooling passage and to be capable of exchanging heat with the refrigerant flowing through the heating passage.
摘要:
A cooling system (1) includes: a compressor (12) that circulates refrigerant; a heat exchanger (14) and a heat exchanger (15) that carry out heat exchange between refrigerant and outside air; a decompressor (16) that decompresses refrigerant; a heat exchanger (18) that carries out heat exchange between refrigerant and air-conditioning air; a cooling portion (30) that is provided in a path of refrigerant flowing between the heat exchanger (14) and the heat exchanger (15) and that uses refrigerant to cool a heat generating source (31); a first line (24) through which refrigerant circulates between the cooling portion (30) and the heat exchanger (15); a second line (27) through which refrigerant circulates between the heat exchanger (18) and the compressor (12); and an internal heat exchanger (40) in which refrigerant that circulates through the first line (24) and refrigerant that circulates through the second line (27) exchange heat with each other.
摘要:
A cooling system includes a compressor that circulates refrigerant; a condenser that condenses the refrigerant; an expansion valve that reduces a pressure of the refrigerant that has been condensed by the condenser; an evaporator that vaporizes the refrigerant that has been reduced in pressure by the expansion valve; a refrigerant passage through which the refrigerant flows from an outlet of the condenser toward an inlet of the expansion valve, and that includes a passage forming portion that forms part of the refrigerant passage; a second passage that is connected in parallel with the passage forming portion; a cooling portion that is provided in the second passage and cools a heat source using the refrigerant; and an expansion valve that is arranged upstream of the cooling portion in the second passage.
摘要:
A complex fluid machine has an expansion-compressor device, a pump, and a motor generator. The expansion-compressor device, the pump, and the motor generator are operatively connected and arranged in series. A portion of an outlet side passage formed in the fluid machine, through which the working fluid flows from the expansion device, is arranged adjacent to a portion of a pump outlet-side passage formed in the fluid machine, through which the working fluid flows from the pump, so that heat of the working fluid in the outlet side passage is transferred to the working fluid in the pump outlet-side passage.