US 11,054,177 B2
Hybrid heat pump system
Wei Wu, Kowloon (HK)
Assigned to City University of Hong Kong, Kowloon (HK)
Filed by City University of Hong Kong, Kowloon (HK)
Filed on Jun. 13, 2019, as Appl. No. 16/440,232.
Prior Publication US 2020/0393171 A1, Dec. 17, 2020
Int. Cl. F25B 25/02 (2006.01)
CPC F25B 25/02 (2013.01) 9 Claims
OG exemplary drawing
 
1. A hybrid heat pump system comprising:
first compression means operable to form a refrigerant in vapor form and increases the pressure of the refrigerant vapor;
condensing means arranged to receive the pressurized vapor and condenses the vapor under pressure to a liquid;
pressure reduction means through which the liquid refrigerant leaving the condensing means passes to reduce the pressure of the liquid to form a mixture of liquid and vapor refrigerant;
evaporator means arranged to receive the mixture of liquid and vapor refrigerant that passes through the pressure reduction means to evaporate the remaining liquid to form additional refrigerant vapor;
second compression means including first and second parallelly-connected compressors, an inlet port, a first outlet port, and a second outlet port, the second compression means being operable to:
receive, by each of the first and second parallelly-connected compressors, the refrigerant vapor from the evaporator means through the inlet port;
increase the pressure thereof; and
pass a portion of the refrigerant vapor from the first compressor to the condensing means through the first outlet port;
pass another portion of the refrigerant vapor from the second compressor to the first compression means through the second outlet port; and
a conduit operable to pass at least one of the refrigerant vapor leaving the evaporator means and the refrigerant vapor leaving the second compression means to the first compression means.