CN-224215593-U - Heat pump system

CN224215593UCN 224215593 UCN224215593 UCN 224215593UCN-224215593-U

Abstract

The utility model discloses a heat pump system, which comprises a first refrigerant system and a second refrigerant system, wherein the first refrigerant system comprises a first compressor, a first condenser, a first throttling device, a first evaporation pipeline and a first auxiliary evaporation pipeline which are sequentially connected to form a loop, and the second refrigerant system comprises a second compressor, a second auxiliary condensation pipeline, a second throttling device and a second heat exchange pipeline which are sequentially connected to form a loop, wherein the first auxiliary evaporation pipeline and the second auxiliary evaporation pipeline form an auxiliary heat exchanger. Thus, the first compressor may be operated separately to achieve the operation of the first condenser, and the first compressor and the second compressor may be operated simultaneously to improve the heating capacity of the first condenser. The heat pump system effectively reduces energy consumption on one hand and can improve comprehensive energy efficiency of the system on the other hand.

Inventors

HAN PENGFEI
LI DONGZHE
ZHAO YUBIN
HUANG XINBO

Assignees

青岛海信日立空调系统有限公司

Dates

Publication Date: 20260508
Application Date: 20250506

Claims (10)

1. A heat pump system, comprising: A first refrigerant system; a second refrigerant system, which is characterized in that, The first refrigerant system comprises a first compressor, a first condenser, a first throttling device and a first evaporation pipeline which are sequentially connected to form a loop; The second refrigerant system comprises a second compressor, a second auxiliary condensing pipeline, a second throttling device and a second heat exchange pipeline which are sequentially connected to form a loop; the first refrigerant system further includes: A first auxiliary evaporation pipe connected between the suction port of the first compressor and the first evaporation pipe; the first auxiliary evaporation pipeline and the second auxiliary condensation pipeline form an auxiliary heat exchanger.
2. The heat pump system of claim 1, wherein the auxiliary heat exchanger is a plate heat exchanger or a double-pipe heat exchanger; and/or, the first condenser is a plate heat exchanger or a double-pipe heat exchanger.
3. The heat pump system of claim 2, wherein the first condenser is connected to a water line, and wherein a water pump is disposed on the water line.
4. The heat pump system of claim 1, wherein the first evaporation line shares heat exchange fins with the second heat exchange line.
5. The heat pump system of claim 1, wherein the heat pump system comprises an outdoor fan, the first evaporation line and the second heat exchange line sharing the outdoor fan.
6. The heat pump system according to any one of claims 1 to 5, wherein the second refrigerant circulation system includes: The first interface of the four-way valve is connected with the exhaust port of the second compressor, the third interface of the four-way valve is connected with the air suction port of the second compressor, and the fourth interface of the four-way valve is connected with the second heat exchange pipeline; The indoor heat exchanger is connected with the second throttling device and is connected with a second interface of the four-way valve through a switching device; The second auxiliary condensing pipeline is connected with the exhaust port of the second compressor through a second switch device, and the second auxiliary condensing pipeline is connected with the second throttling device through an electronic expansion valve.
7. The heat pump system of claim 6, wherein the second switching device is a second four-way valve, a first port of the second four-way valve is connected to an exhaust port of the second compressor, a second port of the second four-way valve is connected to a second auxiliary condensing line, a third port of the second four-way valve is connected to an air suction port of the second compressor and a third port of the four-way valve, and a fourth port of the second four-way valve is connected to the air suction port of the second compressor through a fourth switching device.
8. The heat pump system of claim 6, wherein the heat pump system comprises: The indoor unit comprises the indoor heat exchanger; A first outdoor unit including the first compressor, a first condenser, and an auxiliary heat exchanger; The second outdoor unit comprises the second compressor, a first evaporation pipeline, a second heat exchange pipeline, a four-way valve and a second four-way valve.
9. The heat pump system of claim 8, wherein the indoor unit comprises a switching device, the first outdoor unit comprises a first throttling device, and the second outdoor unit comprises a second throttling device and an electronic expansion valve.
10. The heat pump system of claim 8, wherein, The indoor unit is connected with the second outdoor unit through a stop valve, and the second outdoor unit is connected with the first outdoor unit through a stop valve.

Description

Heat pump system Technical Field The utility model relates to the technical field of heat pump systems, in particular to a heat pump system with overlapping. Background Cascade heat pump systems typically consist of two separate systems, a high temperature stage section and a low temperature stage section. The high temperature stage uses a high temperature refrigerant, and the low temperature stage uses another refrigerant having a lower evaporation temperature. The amount of refrigeration by which the high-temperature portion refrigerant evaporates is taken as the amount of condensation heat of the low-temperature portion refrigerant. This cycle is completed in a condensing evaporator, which is both an evaporator of high temperature refrigerant and a condenser ‌ of low temperature refrigerant. The existing cascade heat pump system has the following problems that 1. When hot water is required, a high-temperature-level unit starts to operate, and as the evaporator of the high-temperature-level unit is a condenser ‌ of low-temperature refrigerant, the low-temperature-level unit also needs to operate, compressors of the two systems operate simultaneously, and energy consumption is high. 2. The condenser of the low-temperature-stage unit is used as the evaporator of the high-temperature stage, but the evaporator of the low-temperature stage may not be effectively utilized, so that the overall comprehensive energy efficiency of the heat pump system is low. The above information disclosed in this background section is only for enhancement of understanding of the background section of the application and therefore it may not form the prior art that is already known to those of ordinary skill in the art. Disclosure of Invention The utility model provides a heat pump system, which solves the technical problem of high energy consumption caused by the operation of a high-temperature unit and a low-temperature unit of the existing cascade heat pump system. In order to achieve the aim of the utility model, the utility model is realized by adopting the following technical scheme: A heat pump system, comprising: A first refrigerant system; A second refrigerant system; the first refrigerant system comprises a first compressor, a first condenser, a first throttling device and a first evaporation pipeline which are sequentially connected to form a loop; The second refrigerant system comprises a second compressor, a second auxiliary condensing pipeline, a second throttling device and a second heat exchange pipeline which are sequentially connected to form a loop; the first refrigerant system further includes: A first auxiliary evaporation pipe connected between the suction port of the first compressor and the first evaporation pipe; the first auxiliary evaporation pipeline and the second auxiliary condensation pipeline form an auxiliary heat exchanger. The heat pump system comprises a first refrigerant system and a second refrigerant system, wherein the first refrigerant system comprises a first compressor, a first condenser, a first throttling device, a first evaporation pipeline and a first auxiliary evaporation pipeline which are sequentially connected to form a loop, and the second refrigerant system comprises a second compressor, a second auxiliary condensation pipeline, a second throttling device and a second heat exchange pipeline which are sequentially connected to form the loop, wherein the first auxiliary evaporation pipeline and the second auxiliary evaporation pipeline form an auxiliary heat exchanger. Thus, the first compressor may be operated separately to achieve the operation of the first condenser, and the first compressor and the second compressor may be operated simultaneously to improve the heating capacity of the first condenser. The heat pump system effectively reduces energy consumption on one hand and can improve comprehensive energy efficiency of the system on the other hand. In some embodiments, the auxiliary heat exchanger is a plate heat exchanger or a double pipe heat exchanger; and/or, the first condenser is a plate heat exchanger or a double-pipe heat exchanger. The auxiliary heat exchanger is arranged as the plate heat exchanger or the sleeve heat exchanger, and the second refrigerant system acts on the first refrigerant system through the plate heat exchanger or the sleeve heat exchanger. The first condenser is a plate heat exchanger or a sleeve heat exchanger, and the heat output of the first condenser is realized through the plate heat exchanger or the sleeve heat exchanger. In some embodiments, the first condenser is connected with a water line, and a water pump is arranged on the water line. The technical scheme has the advantages that the heat output of the first condenser is realized through the water pipeline and the water pump, and the function of producing domestic hot water can be realized. In some embodiments, the first evaporation tube shares heat exchange fins with the second heat