초록 ▼

A boosted air source heat pump system is presented having a primary compressor, a booster compressor and an economizer. On activation of the heat pump system, the primary compressor is operated. When the primary compressor cannot meet the demand, the booster compressor is activated, but only upon re

A boosted air source heat pump system is presented having a primary compressor, a booster compressor and an economizer. On activation of the heat pump system, the primary compressor is operated. When the primary compressor cannot meet the demand, the booster compressor is activated, but only upon receipt of a signal enabling the operation of the booster compressor. The booster compressor is preferably a variable speed booster, and its speed is controlled to be at or between an absolute minimum speed and an absolute maximum speed. The booster may be on the low side or the high side of the primary compressor. The operation of the economizer may be modulated to meet the demand on the system.

대표청구항 ▼

[ What is claimed is:] [1.] A heat pump including:a primary compressor;a booster compressor;first and second heat exchange means;flow conduit means connecting said first and second heat exchange means and said primary compressor for circulating a refrigerant fluid in a closed loop;economizer means c

[ What is claimed is:] [1.] A heat pump including:a primary compressor;a booster compressor;first and second heat exchange means;flow conduit means connecting said first and second heat exchange means and said primary compressor for circulating a refrigerant fluid in a closed loop;economizer means connected in said flow conduit means between said first and second heat exchangers;bleed means connected from said flow conduit means to said economizer means to deliver a portion of the refrigerant fluid to said economizer means for vaporization in heat exchange with the remaining portion of refrigerant fluid passing through said economizer means;conduit means connected from said economizer means to said flow conduit means upstream of the intake of said primary compressor;first sensor means for sensing a parameter commensurate with the temperature of ambient outdoor air;second sensor means for sensing a parameter of booster compressor operation commensurate with power input to said booster compressor;thermostat means for sensing the temperature of a fluid to be heated or cooled; andcontrol means responsive to inputs from said first sensor means, said second sensor means and said thermostat means for controlling operation of said primary compressor and said booster compressor, said control means functioning initially to operate said primary compressor in response to a first input signal from said thermostat means while maintaining said booster compressor inoperative, and thereafter functioning to operate said booster compressor and said primary compressor upon receipt of a second signal from said thermostat means and receipt of a booster enabling signal commensurate with the temperature of ambient outdoor air;said flow conduit means being connected to bypass said booster compressor and deliver fluid from one of said heat exchangers to said primary compressor when said booster compressor is inoperative, and said flow conduit means being connected to deliver fluid from said one heat exchanger to said booster compressor and from said booster compressor to said primary compressor when operation of said booster compressor is initiated.