Heat source unit

摘要

A time for loading a refrigerant is shortened when a utilization unit of an air conditioner is installed. A heat source unit 1 includes a compressor 100; a heat-source-side heat exchanger 200; a refrigerant regulator 61 storing a refrigerant; an introducing pipe 62 which is a pipe that is branched off from a discharge-side pipe 110 of the compressor 100 and connected to the refrigerant regulator 61, and introduces the refrigerant discharged from the compressor 100 into the refrigerant regulator 61; and a lead-out pipe 63 which is a pipe that is connected from the refrigerant regulator 61 to an intake-side pipe 120 of the compressor 100, and leads out the refrigerant stored in the refrigerant regulator 61 into the intake-side pipe 120.

主权项

1. A heat source unit of an air conditioner having a refrigerant circuit, comprising:
a compressor; a heat-source-side heat exchanger; a refrigerant regulator storing a refrigerant; an introducing pipe which is a pipe that is branched off from a discharge-side pipe of the compressor and connected to the refrigerant regulator, and introduces the refrigerant discharged from the compressor into the refrigerant regulator; a lead-out pipe which is a pipe that is connected from the refrigerant regulator to an intake-side pipe of the compressor, and leads out the refrigerant stored in the refrigerant regulator into the intake-side pipe; an introducing pipe electromagnetic valve provided in the introducing pipe; a lead-out pipe motor-operated valve with an adjustable opening degree that is provided in the lead-out pipe, and regulating a lead-out amount of the refrigerant stored in the refrigerant regulator and led out to the intake-side pipe; a liquid refrigerant branched pipe that is branched off from a liquid refrigerant pipe and connected to the refrigerant regulator; an intake-side connection pipe connected to the refrigerant regulator and the intake-side pipe; a liquid refrigerant branched pipe electromagnetic valve provided in the liquid refrigerant branched pipe; an intake-side connection pipe electromagnetic valve provided in the intake-side connection pipe; and a control unit configured to open both the introducing pipe electromagnetic valve and the lead-out pipe motor-operated valve to load refrigerant stored in the refrigerant regulator into the refrigerant circuit and to close both the introducing pipe electromagnetic valve and the lead-out pipe motor-operated valve when the refrigerant circuit is loaded, wherein one end of the introducing pipe is connected to an upper part of the refrigerant regulator and located above a liquid level of liquid refrigerant stored in the refrigerant regulator, one end of the lead-out pipe is connected to a bottom of the refrigerant regulator and located below the liquid level of liquid refrigerant stored in the refrigerant regulator, one end of the liquid refrigerant branched pipe is connected to an upper part of the refrigerant regulator and located above the liquid level of liquid refrigerant stored in the refrigerant regulator, one end of the intake-side connection pipe is connected to an upper part of the refrigerant regulator and located above the liquid level of the liquid refrigerant stored in the refrigerant regulator, the control unit starts a first control of stopping the compressor, setting the liquid refrigerant branched pipe electromagnetic valve to the closed state and setting the intake-side connection pipe electromagnetic valve to an open state, whereby the refrigerant regulator communicates with the intake-side pipe in the first control, when the first control is completed, the control unit starts a second control of setting the liquid refrigerant branched pipe electromagnetic valve to the open state and setting the intake-side connection pipe electromagnetic valve to a closed state, whereby the refrigerant regulator communicates with the liquid refrigerant pipe, and when the second control is completed, the control unit sets both the liquid refrigerant branched pipe electromagnetic valve and the intake-side connection pipe electromagnetic valve to the closed state.