A cold generator incorporates a heat exchanger unit integrating a heat-emitting heat exchanger and a heat-absorbing heat exchanger. The heat exchanger unit has a flow path layer stack built up in a stacked construction. In order to form the heat-emitting heat exchanger in the flow path layer stack, at least one heat-emitting refrigerant flow path and at least one heat-absorbing second heat transport flow path are provided. A second heat transport medium guided in a second heat transport circuit is arranged to flow through the second heat transport flow path. At least one heat-absorbing refrigerant flow path and at least one heat-emitting first heat transport flow path are provided in order to form the heat-absorbing heat exchanger in the flow path layer stack with a first heat transport medium guided in a first heat transport circuit that is arranged to flow through the first heat transport flow path.

A refrigerant cycle system includes: a primary-side cycle of a vapor compression type that circulates a first refrigerant; a secondary-side cycle of a vapor compression type that circulates a second refrigerant; and a cascade heat exchanger that exchanges heat between the first refrigerant and the second refrigerant. The secondary-side cycle includes a secondary-side heat exchanger that uses cold or heat obtained by the second refrigerant from the cascade heat exchanger. The secondary-side heat exchanger includes a flat multi-hole pipe.

A condenser for a vehicle includes an integrally formed receiver-drier and a plurality of stacked plates. The condenser may be used in an air conditioning having an expansion valve expanding liquid refrigerant, an evaporator evaporating the refrigerant expanded at the expansion valve through heat-exchange with air, and a compressor receiving from the evaporator and compressing gaseous refrigerant, may be provided between the compressor and the expansion valve, and may circulate coolant supplied from a radiator so as to condense the refrigerant supplied from the compressor through heat-exchange with the coolant and the refrigerant.

In one embodiment, a plate for an evaporative cooler is disclosed. The plate may comprise a wicking material with an exposed surface and a sealed surface opposite the exposed surface. An impermeable barrier may be coupled to the sealed surface. One or more masks may line a portion of the exposed surface, wherein the masks may comprise an impermeable material. In some embodiments, the mask may be a strip of impermeable material and may be coupled to a flat area of the top surface. In further embodiments, the one or more masks may align with a liquid wick path of the wicking material. In further embodiments, the one or more masks may line the edge of perforations that pass at least partially through the plate.

A refrigeration circuit includes: a gas-liquid separator into which a gas-liquid two-phase refrigerant flowed out from a condenser flows, the gas-liquid separator being configured to separate the gas-liquid two-phase refrigerant into a vapor phase refrigerant and a liquid phase refrigerant; and a plate heat exchanger including a first heat exchanging part and a second heat exchanging part, the first heat exchanging part being a part where the vapor phase refrigerant flowed out from the gas-liquid separator and the liquid phase refrigerant flowed out from the gas-liquid separator exchange heat, the second heat exchanging part being a part where the vapor phase refrigerant flowed out from the first heat exchanging part and a returning refrigerant flowed out from an evaporator exchange heat.

Provided is an air conditioner system for a vehicle. The air conditioner system for a vehicle includes a compressor, an integral condenser in which a water cooling region and an air cooling region are formed integrally with each other, an expansion valve, and an evaporator, wherein the water cooling region and the air cooling region of the integral condenser are formed on one plate, such that existing air cooling and water cooling condensers may be formed integrally with each other through one-time brazing coupling, thereby reducing a package and simplifying assembling and manufacturing processes.

A plate heat exchanger can reduce thermal contact between a second fluid (water and a third fluid (low-temperature, low-pressure two-phase refrigerant) to enhance thermal efficiency. A plate heat exchanger (1b) includes a heat transfer plate group (102a) that performs heat exchange between a first fluid of high-temperature, high-pressure gas refrigerant and a second fluid of a heating target fluid; and a heat transfer plate group (102b) that performs heat exchange between a first fluid of low-temperature, high-pressure liquid refrigerant and a third fluid of low-temperature, low-pressure two-phase liquid refrigerant. The heat transfer plate group (102a) forms refrigerant channels including a stack of plates, has a configuration that a flow of the first fluid of high-temperature, high-pressure gas refrigerant and a flow of the second fluid are alternately aligned in the refrigerant channels, and causes the second fluid to flow in the outermost refrigerant channel.

Abstract: Heat exchanger, in particular condenser, comprises two parallel end closing plates (1, 2) having made a coolant inlet and outlet and at least one inlet and an outlet of the refrigerant. A heat exchange unit is provided between the closing plates (1, 2) and at least one coolant compartment and at least one refrigerant compartment, separated by an inner plate (5). The coolant compartments and, refrigerant compartments are arranged alternately and connected such that they form together with said inlets and outlets separated hydraulic circuits for the coolant and refrigerant and a turbulator panel (3, 4) is arranged in each of the compartments (3, 4). The turbulator panels (3) of the refrigerant circuit comprise on their surface first disturbing elements (9) the shape of which is matched to the physical properties of the gaseous refrigerant, and which determine the height of the turbulator panel of the refrigerant circuit, while the turbulator panels (4) of the coolant circuit comprise on their surface second disturbing elements (10) the shape of which is matched to the physical properties of the liquid coolant which determine the height of the turbulator panel of the coolant circuit, wherein the shape of the first disturbing elements (9) is different from the shape of the second disturbing elements (10). The shape of the turbulator panels (3, 4) is matched to the independent optimal managing, slowing down and disturbing of the refrigerant and the coolant, while ensuring a low pressure drop of their flow to achieve a high heat exchange coefficient.

A condenser includes a gaseous refrigerant section, a liquid refrigerant section, a heat exchange channel, a refrigerant inlet port, and a refrigerant outlet port. The heat exchange channel allows flowing of a cooling fluid. An overheat gaseous refrigerant having high pressure and high temperature is introduced from a compressor into the refrigerant inlet port. A liquid refrigerant is introduced through the refrigerant outlet port into an expansion valve. The refrigerant inlet port is located at the liquid refrigerant section to enhance a working efficiency of the condenser.

An absorption refrigeration and air conditioning device capable of controlling temperature and/or the humidity of enclosed spaces particularly useful in maritime applications and improving fuel economy of internal combustion engines is provided.