Patent ID: 9377211
Filing Date: 2016-06-28
CPC Classification: F24F,F25B

Claim Text:
1. An outdoor unit comprising: a compressor that compresses a flammable refrigerant; a heat source side heat exchanger exchanging heat between the refrigerant and air in an unconditioned space; an outdoor unit air-sending device disposed at a position where the air is enabled to flow out of a housing to the outside, the outdoor unit air-sending device being driven to maintain a concentration of the refrigerant in the housing at or below a predetermined concentration; and an outdoor unit controller that controls an operation of the compressor and an operation of the outdoor unit air-sending device, wherein the outdoor unit controller allows the outdoor unit air-sending device to operate at a ventilation air flow rate corresponding to an amount of refrigerant in a refrigerant circuit in order to maintain the concentration of the refrigerant at or below the predetermined concentration even when the compressor is stopped, the refrigerant circuit being configured to connect the compressor, the heat source side heat exchanger, an expansion device reducing pressure of the refrigerant and a load side heat exchanger exchanging heat between the refrigerant and a load by piping.