F - Mech Eng,Light,Heat,Weapons – 25 – B
Patent
F - Mech Eng,Light,Heat,Weapons
25
B
F25B 1/10 (2006.01) F24D 3/18 (2006.01) F24D 15/04 (2006.01) F25B 13/00 (2006.01) F25B 47/02 (2006.01) F25B 49/02 (2006.01)
Patent
CA 2642179
A heat pump system is disclosed that utilizes a primary compressor, a booster compressor, and a controlled heat exchanger heat exchanger fluidly connected between the boost compressor output and the primary compressor input. The controlled heat exchanger functions to reduce the temperature of the refrigerant entering the primary compressor, thereby allowing the booster compressor to operate for longer periods without overheating the primary compressor. Increasing compressor run times improves both the heat pump efficiency and extends the compressor lifespan. The heat energy may be diverted away from the primary compressor to a hydronics system for heating an indoor space. Additionally, heat energy may be withdrawn from the hydronics system to defrost the outdoor coil of the heat pump system The periods of compressor inactivity may also be extended by withdrawing heat energy stored in a hydronics tank. The heat pump system utilizes an accumulator fluidly connected between a boost compressor output and a primary compressor input. The accumulator is multifunctional in that it allows the refrigerant from the boost compressor to be cooled with refrigerant from other parts of the system if necessary. The accumulator also serves to receive and cool the oil separated from the refrigerant near the output of the primary compressor. A method for distributing oil among the compressors is also disclosed. The heat pump system utilizes a variable speed hydronics pump to selectively divert heat energy from a forced air heating system to a hydronics radiant heating system. By actively controlling the speed of the withdrawal of heat, the temperature of the forced air output may be maintained while maximizing the amount of heat delivered by the efficient hydronics system. The heat pump system also actively controls the blower of the forced air system. To reduce the frequency of the compressors cycling on and off, a tank may be used to store and dispense heat if the hydronics system is not of sufficient size. -49-
Electro Industries Inc.
Macpherson Leslie & Tyerman Llp
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