US 2026/0177289 A1 · REFRIGERATION SYSTEM

Abstract

The present disclosure provides a refrigeration system capable of efficiently executing a defrosting operation while preventing a decrease in heating capacity. The refrigeration system according to the present disclosure includes: a refrigeration cycle circuit that connects an outdoor unit including a compressor and an outdoor heat exchanger, an indoor unit including an indoor heat exchanger, and a refrigeration-facility unit including a refrigeration-facility heat exchanger; and a control unit, the refrigeration cycle circuit includes a switching mechanism that switches a flow path of a refrigerant according to control of the control unit, and the control unit blocks an inflow of the refrigerant to the indoor heat exchanger during an outdoor defrosting operation for defrosting the outdoor heat exchanger, and operates the refrigeration cycle circuit using the refrigeration-facility heat exchanger as an evaporator and the outdoor heat exchanger as a gas cooler or a radiator.

Claims18

Dependent claims

A refrigeration system comprising:

a refrigeration cycle circuit that connects an outdoor unit including a compressor and an outdoor heat exchanger, an indoor unit including an indoor heat exchanger, and a refrigeration-facility unit including a refrigeration-facility heat exchanger;
and
a control unit, wherein
the refrigeration cycle circuit includes a switching mechanism that switches a flow path of a refrigerant according to control of the control unit, and
the control unit blocks an inflow of the refrigerant to the indoor heat exchanger during an outdoor defrosting operation for defrosting the outdoor heat exchanger, and operates the refrigeration cycle circuit using the refrigeration-facility heat exchanger as an evaporator and the outdoor heat exchanger as a gas cooler or a radiator.

2 more elements

A refrigeration system comprising

a refrigeration cycle circuit that connects an outdoor unit including a compressor, an outdoor heat exchanger, an outdoor expansion mechanism, and an outdoor fan, an indoor unit including an indoor heat exchanger, an indoor expansion mechanism, and an indoor fan, and a refrigeration-facility unit including a refrigeration-facility heat exchanger and a refrigeration-facility expansion mechanism, wherein
a defrosting pipe is provided to connect a pipe between the refrigeration-facility heat exchanger and the compressor and a pipe between the indoor expansion mechanism and the outdoor expansion mechanism, and a defrosting on-off valve is provided in a middle of the defrosting pipe to be opened during a defrosting operation.

A refrigeration system comprising

a refrigeration circuit including
a plurality of compressors,
a heat source-side heat exchanger,
a plurality of utilization-side heat exchangers, and
a gas-liquid separator,
the plurality of compressors include
a low-stage compressor, and
a high-stage compressor,
the plurality of utilization-side heat exchangers include
a first utilization-side heat exchanger, and
a second utilization-side heat exchanger having a refrigerant evaporation temperature lower than that of the first utilization-side heat exchanger,
the refrigeration circuit is provided with a switching mechanism that causes a refrigerant, which is discharged from the high-stage compressor and flows through at least one of the heat source-side heat exchanger and the first utilization-side heat exchanger, to flow to the gas-liquid separator, and
throttling mechanisms are provided between the heat source-side heat exchanger and the gas-liquid separator and between the first utilization-side heat exchanger and the gas-liquid separator to regulate a pressure of the refrigerant.

10 more elements

Dependencies are inferred from the claim text.

Refrigeration system

Life of this patent

Refrigeration system

Life of this patent

Abstract

Claims18