Provided is a binary refrigeration apparatus including: a low-temperature side refrigeration circuit including a spiral heat exchanger including a main tube and a spiral tube wound around the main tube in a spiral form, the main tube being a tube where a low-temperature side refrigerant that flows into a low-temperature side compressor enters, the spiral tube being a tube where the low-temperature side refrigerant flown out from the low-temperature side compressor enters; and a high-temperature side refrigeration circuit where a high-temperature side refrigerant that exchanges heat with the low-temperature side refrigerant through a plate heat exchanger circulates.

A refrigeration cycle device includes: a compressor; a heat radiating unit that causes refrigerant to heat air supplied to a space inside a vehicle cabin; a decompression unit that decompresses the refrigerant; an outside air heat absorbing unit that causes the refrigerant to absorb heat from outside air; a waste heat absorbing unit that causes the refrigerant to absorb waste heat of a waste heat device; a shutter that opens and closes a passage for the outside air introduced into the outside air heat absorbing unit; and a control unit that closes the shutter when it is determined that an amount of waste heat of the waste heat device is larger than an amount of heat absorbed by the refrigerant in the outside air heat absorbing unit and the waste heat absorbing unit.

A system and method of using a source of low-pressure refrigerant for a cryotherapy procedure. The system may generally include a fluid reservoir and a fluid flow path in thermal exchange with the fluid reservoir, the fluid flow path including a thermal exchange device in thermal exchange with the fluid reservoir, a compressor in fluid communication with the thermal exchange device, a condenser, a reversing valve located between the compressor and the condenser, and an expansion valve located between the condenser and the thermal exchange device. The method may include transferring a low-pressure refrigerant to a first fluid reservoir, reducing the temperature of the refrigerant within the first fluid reservoir, increasing the temperature of the refrigerant within the first fluid reservoir, and transferring the pressurized refrigerant from the first fluid reservoir to a second fluid reservoir.

A refrigerant replacement method for a refrigeration apparatus is intended to replace a first refrigerant charged into a refrigerant circuit of the refrigeration apparatus with a second refrigerant. The second refrigerant is used together with a refrigerating machine oil having a higher additive content by percentage than another refrigerating machine oil to be used together with the first refrigerant. The method includes: a refrigerant recovery step of recovering the first refrigerant from the refrigerant circuit; an oil charging step of additionally charging a refrigerating machine oil having a predetermined additive content by percentage into the refrigerant circuit; and a refrigerant charging step of charging the second refrigerant into the refrigerant circuit. The predetermined additive content by percentage is higher than the additive content by percentage of the refrigerating machine oil to be used together with the second refrigerant.

A heat-radiation apparatus includes a housing and a plurality of heat-radiation modules which are aligned in a vertically-slanted manner with a predetermined inclination angle to a vertical line in the housing. A plurality of heat-radiation modules includes a plurality of heat exchangers which is aligned together in parallel and equipped with a plurality of fans to parallelize axial lines thereof with each other. In a manufacturing method of the heat-radiation apparatus, the number of heat-radiation modules is adjusted according to a radiation amount which is determined in advance.

An air conditioner includes a housing including an indoor cavity and an outdoor cavity spaced apart from and communicating with each other, an indoor unit assembly provided in the indoor cavity, and an outdoor unit assembly connected to the indoor unit assembly and provided in the outdoor cavity. A part of a bottom wall of the housing is recessed towards an inner cavity of the housing to form a mounting groove and penetrating opposite side walls of the housing. The mounting groove is located between the indoor cavity and the outdoor cavity.

Embodiments of the present disclosure relate to an electronic identification system of a logic board for use in variable speed drives. Specifically, the present disclosure relates to a logic board for a variable speed drive having a configuration block that includes a plurality of resistors, a control system communicatively coupled to and configured to receive a signal from the configuration block, where the control system is configured to decode the signal to generate data indicative of an identity of the logic board, and a communication interface coupled to the control system, where the communication interface is configured to provide the data indicative of the identity of the logic board to an operator.

A refrigerant pump and a data center cooling system. The data center cooling system includes a refrigerant connected between a condenser and an evaporator. The refrigerant includes a housing, a partition plate, and a pump head. The housing is provided with a liquid inlet and a liquid outlet. The partition plate is disposed inside the housing, and they jointly form first space and second space. A pump body includes the pump head and a motor. An inlet of the pump head is located at the bottom of the first space in a gravity direction. The motor is located in the second space. The pump head is configured to transfer refrigerant in the first space to the second space. The liquid inlet is directly connected to the condenser by using a pipeline. The first space is configured to store refrigerant of the data center cooling system.

The present invention relates to a gas heat pump system. The gas heat pump system, according to one embodiment of the present invention, comprises: an air conditioning module comprising a compressor, an outdoor heat exchanger, an expansion apparatus, an indoor heat exchanger and a refrigerant line; and an engine module comprising an engine for combusting a mixture of fuel and air, thereby providing power for driving the compressor. The engine module comprises: a mixer for mixing and discharging the air and fuel; a supercharging means for receiving the mixture discharged from the mixer, compressing same, and then discharging same; an intercooler for receiving the mixture compressed in the supercharging means, cooling same by a heat exchange method, increasing the density thereof, and then discharging same; an adjustment means for receiving the mixture discharged from the intercooler, adjusting the quantity thereof, and then supplying same to the engine; and an exhaust gas heat exchanger for exchanging heat between a coolant and exhaust gas discharged from the engine.

The present invention relates to a gas heat pump system. The gas heat pump system, according to one embodiment of the present invention, comprises: an air conditioning module comprising a compressor, an outdoor heat exchanger, an expansion apparatus, an indoor heat exchanger and a refrigerant line; and an engine module comprising an engine for combusting a mixture of fuel and air, thereby providing power for driving the compressor. The engine module comprises: a mixer for mixing and discharging the air and fuel; a supercharging means for receiving the mixture discharged from the mixer, compressing same, and then discharging same; an intercooler for receiving the mixture compressed in the supercharging means, cooling same by a heat exchange method, increasing the density thereof, and then discharging same; an adjustment means for receiving the mixture discharged from the intercooler, adjusting the quantity thereof, and then supplying same to the engine; and an exhaust gas heat exchanger for exchanging heat between a coolant and exhaust gas discharged from the engine, wherein the exhaust gas heat exchanger is directly connected to an exhaust manifold of the engine.