REFRIGERATING AND AIR-CONDITIONING APPARATUS

摘要

A refrigerating and air-conditioning apparatus suppresses liquid backflow to a compressor with a simple configuration, and reduces annual power consumption.;An outdoor unit and an indoor unit are connected to each other by a gas-side connecting pipe and a liquid-side connecting pipe to form a refrigerant circuit in which a compressor, a four-way valve, an indoor heat exchanger, a refrigerant heat exchanger, an expansion valve, an outdoor heat exchanger, and an accumulator are sequentially connected. The refrigerant heat exchanger transfers heat between a high-pressure-side refrigerant flowing between the expansion valve and an outdoor-unit liquid pipe connecting portion and a low-pressure-side refrigerant on an outlet side of the accumulator.

主权项

1. A refrigerating and air-conditioning apparatus comprising:
an outdoor unit including a compressor, a flow switching device, a refrigerant vessel, a heat-source-side heat exchanger, a pressure reducing device, and a refrigerant heat exchanger; and an indoor unit including a load-side heat exchanger, wherein the outdoor unit and the indoor unit are connected to each other by a gas-side connecting pipe and a liquid-side connecting pipe to form a refrigerant circuit in which the compressor, the flow switching device, the load-side heat exchanger, the refrigerant heat exchanger, the pressure reducing device, the heat-source-side heat exchanger, and the refrigerant vessel are sequentially connected; and the refrigerant heat exchanger transfers heat between a refrigerant flowing between the pressure reducing device and an outdoor-unit liquid pipe connecting portion which is a connecting portion of the liquid-side connecting pipe on a side of the outdoor unit and a refrigerant on an outlet side of the refrigerant vessel.