An accumulator includes a tank, a desiccant, a suction pipe. The tank is configured to separate a refrigerant flowing therein into a gas-phase refrigerant and a liquid-phase refrigerant, store the liquid-phase refrigerant in the tank, and discharge the gas-phase refrigerant toward a suction side of a compressor. The desiccant is accommodated in a container and removing moisture in the refrigerant. The suction pipe is provided inside the tank and having a suction port through which the gas-phase refrigerant is sucked into the suction pipe. The desiccant is provided inside the suction pipe. According to this accumulator, a bumping due to the desiccant and an increase in size of the tank can be suppressed.

Disclosed are cascaded refrigeration systems, comprising: a plurality of refrigeration units, each refrigeration unit containing a first refrigeration circuit, each first refrigeration circuit comprising an evaporator and a heat exchanger; and a second refrigeration circuit; wherein each first circuit heat exchanger is arranged to transfer heat energy between its respective first refrigeration circuit and the second refrigeration circuit.

A combination of a refrigerant accumulator and an internal heat exchanger includes a central portion with fluid portions to which the accumulator and heat exchanger are attachable. A connection component includes at least four fluid ports, and components of a refrigerant circuit, in particular an accumulator and/or a heat exchanger, can be mounted thereto on at least two opposite sides.

A cooling system partially floods the low temperature low side heat exchangers (e.g., freezers) in the system. An accumulator is positioned between the low temperature low side heat exchangers and the low temperature compressor. The accumulator collects the refrigerant (both liquid and vapor) from the flooded low temperature low side heat exchangers. Refrigerant discharged by the low temperature compressor is fed through the accumulator so that heat can be transferred to the refrigerant collected in the accumulator. As a result, the temperature of the refrigerant discharged by the low temperature compressor drops before that refrigerant reaches the medium temperature compressor.

The present solution provides a cyclone for separation of gas-liquid mixtures, particularly suitable for a refrigerant accumulator or an accumulator with an internal heat exchanger in a vehicle air conditioning system using carbon dioxide as refrigerant, including an inlet of the gas-liquid mixture and a body of the cyclone with an inlet chamber, an outlet chamber, and at least one stationary vane in the form of a helix to ensure rotation of the mixture in the cyclone outlet chamber, where the gas-liquid mixture inlet is arranged substantially coaxially with the axis of the cyclone and opens directly into the inlet chamber of the cyclone body. The solution further provides a refrigerant accumulator and an accumulator with an integrated internal heat exchanger which includes the cyclone according to the invention.

An HVAC system includes a refrigerant liquid-gas separator. The liquid-gas separator is thermally coupled to electronics to transfer heat away from the electronics, and assist in vaporizing liquid refrigerant. The liquid-gas separator device includes a refrigeration section configured to couple to a refrigeration loop, and electronics thermally coupled to the refrigeration section. The refrigeration section includes: (a) a refrigerant inlet configured to receive refrigerant from the refrigeration loop; (b) a refrigerant outlet configured to release vapor refrigerant to the refrigeration loop; and (c) a cavity coupled to the refrigerant inlet and the refrigerant outlet, the cavity configured to separate liquid refrigerant from vapor refrigerant. During use of the HVAC system, heat from the electronics board is transferred to the refrigerant. The liquid-gas separator includes a check valve configured to inhibit flow of refrigerant into the liquid-gas separator device via the refrigerant outlet.

A system is described herein for repurposing waste heat from a refrigeration cycle to improve the efficiency of the cycle and power electronic devices. The system may include a compressor, a turbine, an accumulator, a condenser, a throttle, and an evaporator. The accumulator may include a high-pressure chamber connected between the turbine and condenser, and a low-pressure chamber connected between the evaporator and the compressor. The high-pressure chamber may be segregated from the low-pressure chamber such that high-pressure refrigerant in the high-pressure chamber is prevented from mixing with low-pressure refrigerant in the low-pressure chamber. The high-pressure chamber and low-pressure chamber may be thermally coupled such that liquid refrigerant in the low-pressure chamber is vaporized by heat exchange with the high-pressure chamber. The turbine may power an electronic component of the refrigerator or may feed electricity back into a community grid power system.

An integrated system floods an air conditioning low side heat exchanger such that the air conditioning low side heat exchanger does not evaporate all the liquid refrigerant entering the air conditioning low side heat exchanger. As a result, both liquid and vapor refrigerant leave the air conditioning low side heat exchanger. The system includes an additional receiver that stores the refrigerant leaving the air conditioning low side heat exchanger. To prevent the liquid refrigerant in the receiver from overflowing, the liquid refrigerant in the receiver is used in a refrigeration system when the level of liquid refrigerant in the receiver exceeds a threshold (e.g., as detected by a sensor in the receiver).

A gas-liquid separator includes a first cylinder, a second cylinder, a heat exchange pipe, a flow guide pipe, a distribution portion, and a lower sealing cover. The gas-liquid separator has a first cavity and a second cavity. The second cavity includes at least the space located in the first cylinder. The distribution portion includes a first passage. One end of the first passage is communicated with that of the flow guide pipe. The other end of the flow guide pipe is communicated with the second cavity. The other end of the first passage is communicated with the first cavity. The lower sealing cover is located at the other side far away from the distribution portion. The gas-liquid separator further includes a flow passage located, at least in part, in the lower sealing cover, communicated with the first cavity and communicated with the second cavity.

An HVAC system includes a refrigerant liquid-gas separator. The liquid-gas separator is thermally coupled to electronics to transfer heat away from the electronics, and assist in vaporizing liquid refrigerant. The liquid-gas separator device includes a refrigeration section configured to couple to a refrigeration loop, and electronics thermally coupled to the refrigeration section. The refrigeration section includes: (a) a refrigerant inlet configured to receive refrigerant from the refrigeration loop; (b) a refrigerant outlet configured to release vapor refrigerant to the refrigeration loop; and (c) a cavity coupled to the refrigerant inlet and the refrigerant outlet, the cavity configured to separate liquid refrigerant from vapor refrigerant. During use of the HVAC system, heat from the electronics board is transferred to the refrigerant. The liquid-gas separator includes a check valve configured to inhibit flow of refrigerant into the liquid-gas separator device via the refrigerant outlet.