Dilution refrigeration device and method comprising a loop working circuit containing a working fluid comprising a mixture of helium-3 (3He) and helium-4 (4He), the working circuit comprising, arranged in series and fluidically connected via a first set of pipes, a mixing chamber, an evaporator and transfer member, the first set of pipes being configured to transfer the working fluid from an outlet of the mixing chamber to an inlet of the evaporator and from an outlet of the evaporator to an inlet of the transfer member, the working circuit comprising a second set of pipes connecting an outlet of the transfer member to an inlet of the mixing chamber, the working circuit comprising at least a first heat-exchange portion for exchange of heat between at least part of the first set of pipes and the second set of pipes, the first heat-exchange portion being situated between the evaporator and the mixing chamber, the device further comprising at least one cooling member in a heat-exchange relationship with the working circuit, the device comprising at least one cryogenic pumping member situated in the working circuit between the evaporator and the transfer member.

Dilution refrigeration device and method comprising a loop working circuit containing a working fluid comprising a mixture of helium-3 (3He) and helium-4 (4He), the working circuit comprising, arranged in series and fluidically connected via a first set of pipes, a mixing chamber, an evaporator and transfer member, the first set of pipes being configured to transfer the working fluid from an outlet of the mixing chamber to an inlet of the evaporator and from an outlet of the evaporator to an inlet of the transfer member, the working circuit comprising a second set of pipes connecting an outlet of the transfer member to an inlet of the mixing chamber, the working circuit comprising at least a first heat-exchange portion for exchange of heat between at least part of the first set of pipes and the second set of pipes, the first heat-exchange portion being situated between the evaporator and the mixing chamber, the device further comprising at least one cooling member in a heat-exchange relationship with the working circuit, the device comprising at least one cryogenic pumping member situated in the working circuit between the evaporator and the transfer member.

Systems and methods for implementing ejector refrigeration cycles with cascaded evaporation stages that utilize a pump to optimize operation of the ejector and eliminate the need for a compressor between the evaporation stages.

A carbon dioxide refrigerating system and a refrigerating method thereof. A carbon dioxide refrigerating system, comprising a compressor (10), a condenser (11), a liquid storage device (12), and an evaporator (13) connected in sequence; a suction assembly (15) is arranged between the compressor (10) and the condenser (11), the suction assembly (1%) being in communication with the liquid storage device (12) and in communication with a gas-liquid separator (14), the gas-liquid separator (14) being arranged between the condenser (11) and the liquid storage device (12), and the carbon dioxide gas in the liquid storage device (12) or the gas-liquid separator (14) being capable of being sucked back into the pipeline between the compressor (10) and the condenser (11) by means of the suction assembly (15). The refrigerating system can effectively separate gas and liquid, and can also flash evaporate part of the liquid and supercool the carbon dioxide; the flash evaporation-type condenser (11) can achieve a refrigerating effect by means of radiation, and aerosol is formed in the cavity, quickly evaporating and cooling, and thereby increasing the refrigerating efficiency; the refrigerating system has a simple structure, convenient operation, and low installation and maintenance costs.

The present disclosure provides a heat exchange system, air conditioning apparatus and control method for air conditioning apparatus. The heat exchange system including a compressor; a four-way valve; a first heat exchanger; a throttle device; a second heat exchanger; a fluid reservoir, including a first communication port and a second communication port, and the first communication port is communicated with the suction port, and the second communication port is communicated with one end of the second heat exchanger; a first valve body, being arranged on a flow path between the fluid reservoir and the compressor; a second valve body, being arranged on a flow path between the second communication port of the fluid reservoir and the throttle device; and a detection device, being used to detect the refrigerant amount for heat exchange cycle in the heat exchange system.

A cooling system implements various processes to improve efficiency in high ambient temperatures. First, the system can flood one or more low side heat exchangers in the system. Second, the system can direct a portion of vapor refrigerant from a low side heat exchanger to a flash tank rather than to a compressor. Third, the system can transfer heat from refrigerant at a compressor suction to refrigerant at the discharge of a high side heat exchanger.

A relay unit includes: a heat medium heat exchanger; a casing; a first refrigerant pipe connection port connected to one of two refrigerant pipes through which refrigerant circulates between the heat medium heat exchanger and the heat source side unit; a second refrigerant pipe connection port connected to an other of the refrigerant pipes; a first heat medium pipe connection port connected to one of two heat medium pipes through which a heat medium circulates between the heat medium heat exchanger and the load side unit; and a second heat medium pipe connection port connected to an other of the heat medium pipes. The first refrigerant pipe connection port, the second refrigerant pipe connection port, the first heat medium pipe connection port, and the second heat medium pipe connection port are provided on a top surface of the casing and face in a direction opposite to a direction of gravity.

A thermal management system includes a receiver configured to store a refrigerant fluid; a refrigeration system having a refrigerant fluid path that includes the receiver, and at least one evaporator disposed in the refrigerant fluid path. The refrigeration system is configured to receive the refrigerant fluid from the receiver through the refrigerant fluid path. The at least one evaporator is configured to receive the refrigerant fluid and to extract heat from at least one heat load having a specified thermal inertia that is in at least one of thermal conductive or convective contact with the at least one evaporator.

An integrated air conditioning system having a first air conditioning unit having a first evaporator with a first input and a first output; a second air conditioning unit having a second evaporator with a second input and a second output; a first conduit fluidly connecting the first input with the second output; a second conduit fluidly connecting the second input with the first output. The first and second conduits and the first and second evaporators form a working fluid circuit.

An integrated air conditioning system having a first air conditioning unit having a first evaporator with a first input and a first output; a second air conditioning unit having a second evaporator with a second input and a second output; a first conduit fluidly connecting the first input with the second output; a second conduit fluidly connecting the second input with the first output. The first and second conduits and the first and second evaporators form a working fluid circuit.