An object is to inhibit disproportionation reactions that may occur while a refrigerant having a low GWP is used. A freezing apparatus of the present disclosure includes: a compressor, a condenser, an expansion mechanism, and an evaporator. In the freezing apparatus, a working medium containing an ethylene-based fluoroolefin is used as a refrigerant. The compressor includes a suction part that sucks in the working medium, a compression mechanism that compresses the working medium sucked through the suction part, and a refrigerant supply part that supplies the working medium to the compression mechanism via a path different from the suction part. The compressor is an internal low pressure compressor in which the compression mechanism, together with an electric motor, is accommodated in a container, so that the compression mechanism sucks and compresses the working medium present in the container.

This disclosure provides a heat pump system, a control method and apparatus thereof, an air conditioning device and a storage medium, and relates to the field of heat pump technology, wherein the heat pump system includes: a valve assembly being respectively connected with an exhaust outlet and a suction inlet of a compressor, a first end of a second indoor heat exchanger, and a first end of an outdoor unit, and a second end of the second indoor heat exchanger being connected with a second end of the outdoor unit; the valve assembly being configured to control a flow direction and on-off of refrigerant to form a refrigerant loop; and a first control valve being provided in a pipeline between the first end of the first indoor heat exchanger and the exhaust outlet of the compressor.

A refrigerant charge controller for heating, ventilation, or air conditioning (HVAC) equipment includes a processing circuit configured to analyze usage data for the HVAC equipment using a machine learning model to estimate an amount of refrigerant used by the HVAC equipment, identify a refrigerant deficiency based on the amount of refrigerant, and initiate a corrective action in response to identifying the refrigerant deficiency.

A refrigeration cycle apparatus includes a heat source side unit, a relay unit, and a plurality of load side units, the heat source side unit and the relay unit are connected by using a low-pressure pipe and a high-pressure pipe, and the relay unit and each of the plurality of load side units are connected by using a corresponding liquid branch pipe and a corresponding gas branch pipe. The heat source side unit includes a compressor configured to compress refrigerant, at least one flow switching valve configured to change a passage of refrigerant based on an operation mode, and at least one heat source side heat exchanger, and the relay unit includes six-way valves or pairs of four-way valves.

A refrigeration cycle device for a vehicle includes a refrigerant circuit, in which a zeotropic refrigerant mixture is circulated, including a utilization heat exchanger including a first heat exchange portion and a second heat exchange portion disposed in series with the first heat exchange portion in a direction in which the zeotropic refrigerant mixture flows in the refrigerant circuit. The first heat exchange portion is disposed on an upstream side of the second heat exchange portion in a direction in which the zeotropic refrigerant mixture flows when the utilization heat exchanger functions as an evaporator of the zeotropic refrigerant mixture.

A heat-pump system includes a compressor, an outdoor heating exchanger, an indoor heat exchanger, an expansion device, and a supplemental heater. The outdoor heat exchanger is in fluid communication with the compressor. The indoor heat exchanger is in fluid communication with the compressor. The expansion device is in fluid communication with the indoor and outdoor heat exchangers. The supplemental heater includes a heat source and a working-fluid conduit. The heat source is in a heat-transfer relationship with the working-fluid conduit such that the heat source is configured to heat the working-fluid conduit. The working-fluid conduit is disposed fluidly between the expansion device and the indoor heat exchanger.

An HVAC system includes a first indoor heat exchanger coupled to an outdoor heat exchanger and disposed in a first zone. A second indoor heat exchanger is coupled to the outdoor heat exchanger and disposed in a second zone. A compressor is coupled to the outdoor heat exchanger, the first indoor heat exchanger, and the second indoor heat exchanger. A first circulation fan is positioned to circulate air around the first indoor heat exchanger and a second circulation fan is positioned to circulate air around the second indoor heat exchanger. A zone controller is coupled to the first indoor heat exchanger and configured to measure a temperature in the first zone, compare the measured temperature to a setpoint temperature of the first zone, and responsive to a difference between the measured temperature and the setpoint temperature, adjust a speed of the first circulation fan independent the second circulation fan.

An assembly includes a fluid conditioning system including a cascade module and an active charge compensator integrated into the fluid conditioning system. The fluid conditioning system is transformable between a first mode and a second mode. In the first mode, the fluid conditioning system includes a first vapor compression loop and a second vapor compression loop. The first vapor compression loop and the second vapor compression loop are thermally coupled at the cascade module and the second vapor compression loop is fluidly separate from the first vapor compression loop. In the second mode, the fluid conditioning system includes a single vapor compression loop. The active charge compensator is operable to control a working fluid charge within the fluid conditioning system based on the mode of operation selected from the plurality of modes.