A refrigeration apparatus performs refrigeration by freezing circuitry using refrigerant. The refrigeration apparatus includes: an inner door that is provided with a thermal insulation material inside; a case section that includes a peripheral edge section facing a perimeter section of the inner door while the inner door is closed, and that is refrigerated inside by the refrigerant; a packing that is pressed between the perimeter section of the inner door and the peripheral edge section while the inner door is closed; a pipe that is placed along the peripheral edge section, and that circulates the refrigerant warmed by a compression effect of a compressor; and an outer door that covers the inner door while the inner door is closed.

The present disclosure provides an ice machine including: a cabinet; a tray disposed inside the cabinet and having a plurality of cells for respectively forming ice cubes; and a nozzle disposed below the tray and spraying water toward the tray, wherein the plurality of cells includes a first cell having a smaller size and a second cell having a larger size than the first cell, and wherein the nozzle includes a first nozzle for spraying the water into the first cell and a second nozzle for spraying the water into the second cell.

A heat exchange system includes an outdoor unit heat exchange assembly, a first circulation pipeline, a control valve assembly, a heating pipeline and a heating assembly, wherein the outdoor heat exchange assembly includes a coolant heat radiation module and fins; the first circulation pipeline includes an output pipe, a connecting pipe and a return pipe; the output pipe communicates with an air conditioner indoor unit and the coolant heat radiation module; the connecting pipe communicates with the coolant heat radiation module and the fins; the return pipe communicates with the fins and the air conditioner indoor unit; the control valve assembly is connected with the output pipe; the heating pipeline communicates with the output pipe and the fins, communicates with the return pipe, and is also connected with the control valve assembly; and the heating assembly is connected with the heating pipeline.

A heat exchanger includes an inner tube extending along a central axis, an array of a plurality of heat transfer members mounted to the inner tube, and a plurality of outer tubes disposed radially outward of and in parallel relationship to the inner tube, the inner and outer tubes extending longitudinally to pass through the array of heat transfer members. The heat exchanger is particularly suited for use as an engine exhaust cooler in connection with a transport refrigeration unit, wherein the inner tube defines an internal flow passage through which engine exhaust gas passes, each outer tube defines an internal flow passage through which refrigerant passes, and the plurality of flow passages between adjacent heat transfer members defines an air flow passage. In an embodiment, the heat transfer members may be annular disks having an internal chamber filled with air or other heat transfer working fluid.

An air conditioner including a hot gas line for receiving a portion of refrigerant compressed in a compressor, an indoor heat exchanger, an outdoor expansion device for expanding the refrigerant having exchanged heat in the indoor heat exchanger, an outdoor heat exchanger functioning as a condenser in a cooling mode while functioning as an evaporator in a heating mode, and a 4-way valve for receiving a remaining portion of the compressed refrigerant, to guide the refrigerant emerging from the compressor to the outdoor heat exchanger in the cooling mode and to the indoor heat exchanger in the heating mode. The outdoor heat exchanger includes a main heat exchanger section functioning as a condenser in the cooling mode while functioning as an evaporator in the heating mode, and an auxiliary heat exchanger for receiving the refrigerant from the hot gas line in a frosting prevention mode.

An abnormality determination device for a transporting refrigeration apparatus includes a determination unit that determines an abnormality of the transporting refrigeration apparatus installed on a container. In pre-trip inspection that is conducted before the container is loaded on a transporting device, a test operation is performed for test operating modes. The pre-trip inspection is conducted multiple times. The abnormality determination device is configured to obtain at least part of time series test data related to a same one of the test operating modes in the pre-trip inspection. The determination unit is configured to determine whether the transporting refrigeration apparatus has an abnormality based on a change trend of the time series test data related to a same one of the test operating modes when the pre-trip inspection is conducted multiple times, and when there is no abnormality, estimate an abnormality occurrence time.

An ice maker control system includes a low side pressure transducer on a suction line and a high side pressure transducer on a discharge line. The ice maker's refrigeration system is hermetically sealed and devoid of pressure taps for servicing gauges. The ice maker can display an indication of real-time suction or discharge pressure. The ice maker can store records of suction and discharge pressure over time and display time series data for suction and discharge pressure on the display. The ice maker can cycle the condenser fan based on the discharge pressure. An additional high pressure switch can shut off the compressor independently of the controller or transducers. During a pulldown routine, the ice maker refrains from delivering water to the ice formation device until the suction pressure is below a threshold.

A refrigeration cycle apparatus includes: a first four-way valve having first to fourth ports; a second four-way valve and a third four-way valve each having fifth to eighth ports; a compressor; a discharge pipe connecting a discharge port of the compressor and the first port; a suction pipe connecting a suction port of the compressor and the second port; a first high pressure pipe connecting the discharge pipe and the fifth ports; a second high pressure pipe connecting the third port and the first high pressure pipe; a first valve provided at the first high pressure pipe; a second valve provided at the second high pressure pipe; a low pressure pipe connecting the suction pipe and the sixth ports; a first outdoor heat exchanger connected with the seventh port of the second four-way valve; a second outdoor heat exchanger connected with the seventh port of the third four-way valve; and an indoor heat exchanger connected with the fourth port.

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.

An abnormality determination device (60) includes a calculator (66) calculating a deviation degree of a compressor (11) from a normal state based on data related to operation of a refrigeration apparatus (1) and a determination unit (62) determining whether the compressor (11) has an abnormality or estimating an abnormality occurrence time based on a calculation result of the calculator (66). The calculator (66) calculates a first index value from data related to operation of the refrigeration apparatus (1) in a first period and a second index value from data related to operation of the refrigeration apparatus (1) in a second period that differs in length from the first period. The calculator (66) calculates the deviation degree of the compressor (11) from the normal state based on the first index value and the second index value. The determination unit (62) determines whether the compressor (11) has an abnormality or estimates an abnormality occurrence time based on the deviation degree of the compressor (11) from the normal state.