Hybrid heat pump system

Patent metadata

Field	Value
Publication number	US-11085675-B2
Application number	US-201916440255-A
Country	US
Kind code	B2
Filing date	Jun 13, 2019
Priority date	Jun 13, 2019
Publication date	Aug 10, 2021
Grant date	Aug 10, 2021

Abstract

A system and a method for a hybrid heat pump system including 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 first and second portions of refrigerant vapor; second compression means including two, first and second inlet ports and an outlet port and operable to: receive at least a portion of the refrigerant vapor from the evaporator means, the pressurized vapor from the first compression means, and the vapor refrigerant from the condensing means through the first and second inlet ports respectively; increase the pressure thereof; and pass the pressurized vapor to the condensing means through the outlet port; and a conduit operable to pass a portion of the refrigerant vapor leaving the first compression means to the second compression means.

First claim

The invention claimed is:

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 condense 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 first and second portions of refrigerant vapor;
second compression means including a two-stage compressor, a first inlet port, a second inlet port, and an outlet port, the second compression means being operable to:
receive, through the first inlet port or the second inlet port, at least a portion of the refrigerant vapor from the evaporator means at the first stage of the two-stage compressor, and the combination of the pressurized vapor from the first compression means and the vapor refrigerant from the condensing means between the first stage and the second stage of the two-stage compressor subsequent to the first stage;
increase the pressure thereof; and
pass the pressurized vapor to the condensing means through the outlet port; and

a conduit operable to pass a portion of the refrigerant vapor leaving the first compression means to the second compression means.

2. The system of claim 1 , wherein the two-stage compressor further includes an injection-type compressor for injecting the combination of the pressurized vapor from the first compression means and the vapor refrigerant from the condensing means to the two-stage compressor.

3. The system of claim 1 , wherein the pressure at the outlet port is higher than that at the first and second inlet ports, and the pressure at the second inlet port is higher than that at the first inlet port.

4. The system of claim 1 , wherein a portion of the vapor leaving the evaporator means and the combination of the pressurized vapor leaving the first compression means and the vapor refrigerant from the condensing means are received by the second compression means individually and pressurized by the second compression means and subsequently condensed by the condensing means.

5. The system of claim 1 , wherein a portion of the vapor leaving the evaporator means and the vapor refrigerant from the condensing means are received and pressurized by the second compression means, and the pressurized vapor leaving the first and second compression means are subsequently condensed by the condensing means.

6. The system of claim 1 , wherein a portion of the vapor leaving the evaporator means and the pressurized vapor leaving the first compression means are received and pressurized by the second compression means, and the pressurized vapor leaving the second compression means is subsequently condensed by the condensing means.

7. The system of claim 1 , wherein a portion of the vapor leaving the evaporator means is received and pressurized by the second compression means, and the pressurized vapor leaving the first and second compression means are subsequently condensed by the condensing means.

8. The system of claim 1 , wherein the first compression means is activated and the second compression means is deactivated, whereby the refrigerant vapor leaving the evaporator means is received by the first compression means and subsequently received and condensed by the condensing means.

9. The system of claim 1 , wherein the first compression means is deactivated and the second compression means is activated, whereby the refrigerant vapor leaving the evaporator means and the vapor refrigerant from the condensing means are received and pressurized by the second compression means and subsequently received and condensed by the condensing means.

10. The system of claim 1 , wherein the first compression means is deactivated and the second compression means is activated, whereby the refrigerant vapor leaving the evaporator means is received and pressurized by the second compression means and subsequently received and condensed by the condensing means.

11. The system of claim 1 , wherein the fluid communication between the first compression means and the condensing means is manipulated by a first valve and the fluid communication between the first and second compression means is manipulated by a second valve.

12. The system of claim 1 , wherein each of the first stage and the second stage of the two-stage compressor includes at least one of reciprocating compressor, rolling compressor, scroll compressor, screw compressor, and centrifugal compressor.

13. The system of claim 1 , wherein the first compression means further includes:
an absorber that forms a mixture of a refrigerant and an absorbent; and
a generator that receives the mixture from the absorber and heats the mixture to separate refrigerant, in vapor form, from the absorbent.

14. The system of claim 13 , wherein the pressure of the refrigerant vapor from the generator is increased by the second compression means.

15. 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 condense 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 first and second portions of refrigerant vapor;
second compression means including first and second serially-connected compressors, a first inlet port, a second inlet port and an outlet port, the second compression means being operable to:
receive, through the first inlet port or the second inlet port, at least a portion of the refrigerant vapor from the evaporator means at the first compressor of the first and second serially-connected compressors, and the combination of the pressurized vapor from the first compression means and the vapor refrigerant from the condensing means between the first and second serially-connected compressors;
increase the pressure thereof; and
pass the pressurized vapor to the condensing means through the outlet port; and

a conduit operable to pass a portion of the refrigerant vapor leaving the first compression means to the second compression means.

16. The system of claim 15 , wherein the first and second serially-connected compressors further include an injection-type compressor for injecting the combination of the pressurized vapor from the first compression means and the vapor refrigerant from the condensing means to the first and second serially-connected compressors.

17. The system of claim 15 , wherein the pressure at the outlet port is higher than that at the first and second inlet ports, and the pressure at the second inlet port is higher than that at the first inlet port.

18. The system of claim 15 , wherein a portion of the vapor leaving the evaporator means and the combination of the pressurized vapor leaving the first compression means and the vapor refrigerant from the condensing means are received by the second compression means individually and pressuriz

Assignees

• Univ City Hong Kong

Inventors

• Wu Wei

Classifications

• F25B25/02 Primary

  Compression-sorption machines, plants, or systems · CPC title

• F25B1/10

  with multi-stage compression (with cascade operation F25B7/00) · CPC title

• F25B41/28

  specially adapted for sorption cycles · CPC title