Outdoor heat exchanger unit, outdoor unit, and gas heat pump type air conditioner

A gas heat pump type air conditioner, in which a compressor for compressing a refrigerant is driven by a gas engine, and which comprises a heat pump for utilizing waste heat of said gas engine to perform heating and cooling operations:

• wherein said gas heat pump type air conditioner comprises an outdoor unit and an indoor unit;
• said outdoor unit comprises a gas engine portion comprising said gas engine, a cooling water system comprising a radiator, an exhaust gas system for introducing exhaust gas discharged from said gas engine outside of said outdoor unit, and a fuel intake system for supplying fuel and air in said gas engine;
• a refrigerant circuit comprising said compressor, an outdoor heat exchanger apparatus for exchanging heat between said refrigerant and air introduced therein, and an expansion valve for decompressing and expanding said refrigerant in a liquid state during the cooling operation, wherein said radiator is connected in said cooling water system without a valve;
• an outdoor heat exchanger unit is provided in said outdoor unit, in which said radiator and said outdoor heat exchanger apparatus are arranged in series in the flow direction of an outdoor air introduced in said outdoor heat exchanger unit;
• said radiator is positioned downstream with respect to said outdoor heat exchanger apparatus in the flow direction of an outdoor air introduced in said outdoor heat exchanger unit;
• and an interval is between said radiator and said outdoor heat exchanger apparatus;
• wherein said outdoor heat exchanger apparatus comprises at least three heat exchangers arranged in series in the flow direction of outdoor air introduced into said outdoor heat exchanger unit, at least one heat exchanger which is not arranged at both sides of said outdoor heat exchanger apparatus is a warm water heat exchanger belonging to said cooling water system, and said cooling water system further comprises a further valve for selectively introducing cooling water of said gas engine into said warm water heat exchanger, wherein said radiator is connected in said cooling water system so as to receive cooling water simultaneously with said warm water heat exchanger;
• and
• an indoor unit comprises a fan for drawing indoor air and blowing out it front an opening, and an indoor heat exchanger apparatus for exchanging heat between said refrigerant supplied from said outdoor unit and said indoor air drawn by said fan.

An outdoor unit for a gas heat pump air conditioner, comprising:

• a combustion engine having a cooling liquid system including a radiator, wherein said radiator is connected in said cooling liquid system without a valve;
• a compressor for compressing a refrigerant, said compressor being driven by said combustion engine;
• a refrigerant circuit for circulating refrigerant compressed by said compressor, including a refrigerant expansion valve and a plurality of refrigerant heat exchangers;
• and
• an outdoor heat exchanger unit comprising:
• an outdoor heat exchanger apparatus comprising a heat exchanger of said cooling liquid system positioned between heat exchangers of said plurality of refrigerant heat exchangers,
• said radiator positioned at an interval from said outdoor heat exchanger apparatus,
• a valve for selectively introducing cooling liquid of said combustion engine into said heat exchanger of said cooling liquid system, wherein said radiator is connected in said cooling liquid system so as to receive cooling liquid simultaneously with said heat exchanger of said cooling liquid system, and
• a fan positioned to cause outdoor air to flow in a direction such that said radiator is serially positioned downstream with respect to said outdoor heat exchanger apparatus in the flow direction of the outdoor air.