This gas-liquid separator is provided with: a tank part which stores and separates a refrigerant; and a pipe connection part forming outlet/inlet ports for the refrigerant from the tank part. The pipe connection part has: a first connection part having a first connection pipe which guides the refrigerant to an expansion valve; a second connection part having a second connection pipe through which the cooled refrigerant returns; a third connection part having a third connection pipe which guides the refrigerant to a compressor; a fourth connection part having a fourth connection pipe which guides the refrigerant into the tank part from an outdoor heat exchanger; and a first flow path switching valve which allows the inside of the tank part to communicate with the third connection pipe during heating operations, and allows the second connection pipe to communicate with the third connection pipe during cooling operations.

Provided are a flash tank and an air conditioner having the same. The flash tank includes a flash tank liquid inlet (11) and a flash tank liquid outlet (12). The flash tank further includes: a plurality of flash chambers, wherein the flash chambers are arranged in sequence, every two adjacent flash chambers communicating; and a plurality of air replenishment openings (14), the air replenishment openings (14) and the flash chambers corresponding one to one and communicating with each other. The flash tank liquid inlet (11) communicates with the first flash chamber of the flash chambers, and the flash tank liquid outlet (12) communicates with the last flash chamber of the flash chambers. The flash tank may meet an air replenishment demand of a multi-stage compressor.

An air conditioner is provided. The air conditioner may include a compressor, an outdoor heat-exchanger, an indoor heat-exchanger, a converter valve, an accumulator, an accumulator jacket, and a supercooling heat-exchange hub. The accumulator jacket may be disposed on a surface of the accumulator and contain a refrigerating fluid flowing therein. The refrigerating fluid may exchange heat with the accumulator to be cooled. The supercooling heat-exchange hub may be connected to the accumulator jacket to store the cooled refrigerating fluid and overcool the refrigerant flowing between the outdoor heat-exchanger and the indoor heat-exchanger.

A system includes a high side heat exchanger, a flash tank, a compressor, and eight metal beams. Each of the metal beams extend in a linearly vertical direction. The eight metal beams define ten planar boundaries. The first, second, third, and fourth planar boundaries define a first space. The first, fifth, sixth, and seventh planar boundaries define a second space. The fifth, eighth, ninth, and tenth planar boundaries define a third space. The high side heat exchanger is contained entirely within the third space. The flash tank is contained entirely within the first space. The compressor is contained entirely within the second space.

A refrigeration system includes: a compressor arrangement for compressing gaseous refrigerant from a first pressure to a second pressure, wherein the second pressure comprises a condensing pressure; a plurality of condenser evaporator systems, wherein each condenser evaporator system comprises: a condenser for receiving gaseous refrigerant at a condensing pressure and condensing the refrigerant to a liquid refrigerant; a controlled pressure receiver for holding the liquid refrigerant from the condenser; and an evaporator for evaporating liquid refrigerant from the controlled pressure receiver to form gaseous refrigerant; a first gaseous refrigerant feed line for feeding the gaseous refrigerant at the second pressure from the compressor arrangement to the plurality of condenser evaporator systems; and a second gaseous refrigerant feed line for feeding gaseous refrigerant from the plurality of condenser evaporator systems to the compressor arrangement.

A centrifugal chiller in which a closed-cycle refrigeration cycle is formed by connecting a compressor, a condenser, an economizer and decompression means forming a multi-stage compression cycle, and an evaporator, with the refrigeration cycle being charged with a low-pressure refrigerant. The condenser and the economizer are integrated with each other by having a portion of their vessel walls form a shared wall, with the base surface of the economizer being positioned below the base surface of the condenser and above the base surface of the evaporator.

A refrigeration cycle apparatus includes a refrigerant circuit in which a compressor, a first heat exchanger, a first expansion device, a second expansion device, and a second heat exchanger are connected by refrigerant pipes and through which refrigerant circulates, an accumulator provided to the refrigerant circuit, formed to store liquid refrigerant, and from which gas refrigerant is caused to be sucked into the compressor, a liquid-level sensing device provided to the accumulator and sensing a liquid level of the liquid refrigerant stored in the accumulator, and a controller performs, in a case in which the liquid level sensed by the liquid-level sensing device is higher than a threshold, a limiting operation of reducing an amount of suction of the gas refrigerant that is sucked from the accumulator into the compressor and, in a case in which the liquid level is lower than or equal to the threshold, a normal operation.

A dynamic receiver is included in parallel to an expander of a heating, ventilation, air conditioning, and refrigeration (HVACR) system. The dynamic receiver allows control of the refrigerant charge of the HVACR system to respond to different operating conditions. The dynamic receiver can be filled or emptied in response to the subcooling observed in the HVACR system compared to desired subcooling for various operating modes. The HVACR system can include a line directly conveying working fluid from compressor discharge to the dynamic receiver to allow emptying of the dynamic receiver to be assisted by injection of the compressor discharge.

A receiver, a receiver assembly and a heat pump system. The receiver includes a first pipe, a second pipe and a third pipe leading to the cavity of the receiver, wherein the first pipe, the second pipe and the third pipe connect to a first load unit, a second load unit and a cold and heat source unit, respectively.

A method of controlling a transport climate control system includes detecting for leaking of working fluid from a climate control circuit. The method also includes isolating a high-pressure side of the climate control circuit when leaking of the working fluid is detected. A method of controlling a transport climate control circuit includes detecting for overcharge and/or an undercharge of the climate control circuit. A transport climate control system includes a climate control circuit and a climate controller that is configured to detect for working fluid leaking from the climate control circuit. The climate controller configured to isolate a high-pressure side of the climate control circuit when leaking of the working fluid is detected.