Patent ID: 7380411
Filing Date: 2008-06-03
Classification: F25B

Abstract:
1. A heat source unit comprising: a compressing means for compressing refrigerant gas; a main heat exchanger that functions as an evaporator or a condenser of the refrigerant; an auxiliary heat exchanger connected in parallel with said main heat exchanger relative to a refrigerant flow direction and that functions as an evaporator or a condenser of the refrigerant; a refrigerant liquid piping configured to connect to a connecting refrigerant circuit; a first refrigerant gas piping configured to deliver refrigerant flow between the connecting refrigerant circuit and said compressing means; a second refrigerant gas piping configured to deliver the refrigerant gas from the connecting refrigerant circuit to an intake side of said compressing means; a main refrigerant switching means connected between said refrigerant liquid piping and said main heat exchanger; an auxiliary refrigerant switching means connected between said refrigerant liquid piping and said auxiliary heat exchanger; a first switching means operable between said main heat exchanger, said compressing means, said first refrigerant gas piping and said second refrigerant gas piping configured for switching between a first state and a second state, such that in said first state: in said second state: and a second switching means operable between said auxiliary heat exchanger and said compressing means configured for switching between a state in which said first refrigerant gas piping being configured to deliver the refrigerant gas from the connecting refrigerant circuit to said first switching means, and configured to deliver the refrigerant gas from said first switching means to the connecting refrigerant circuit.