CN211147002U - Carbon dioxide heat pump heat storage defrosting system - Google Patents
Carbon dioxide heat pump heat storage defrosting system Download PDFInfo
- Publication number
- CN211147002U CN211147002U CN201922150804.0U CN201922150804U CN211147002U CN 211147002 U CN211147002 U CN 211147002U CN 201922150804 U CN201922150804 U CN 201922150804U CN 211147002 U CN211147002 U CN 211147002U
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- Prior art keywords
- heat
- defrosting
- refrigerant
- carbon dioxide
- heat exchange
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- 238000010257 thawing Methods 0.000 title claims abstract description 43
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 title claims abstract description 40
- 229910002092 carbon dioxide Inorganic materials 0.000 title claims abstract description 20
- 239000001569 carbon dioxide Substances 0.000 title claims abstract description 20
- 238000005338 heat storage Methods 0.000 title claims description 7
- 239000003507 refrigerant Substances 0.000 claims abstract description 33
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 20
- 238000009825 accumulation Methods 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 abstract description 3
- 230000008569 process Effects 0.000 abstract description 3
- 239000012530 fluid Substances 0.000 description 6
- 238000010438 heat treatment Methods 0.000 description 3
- 239000003570 air Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 239000012080 ambient air Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
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- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
Abstract
The utility model discloses a carbon dioxide heat pump heat accumulation defrost system, including compressor, gas cooler, heat accumulator, electronic expansion valve, defrosting solenoid valve and evaporimeter, the system has defrosting operating condition, and under this state, the carbon dioxide refrigerant is introduced the evaporimeter from heat accumulator export one side and is constituted the defrosting return circuit, and when external environment temperature is lower and need defrost the evaporimeter, the system gets into this defrosting operating condition: at the moment, water flow stops, the defrosting electromagnetic valve is opened, the refrigerant discharged by the compressor enters the gas cooler, the gas cooler cannot exchange heat due to the fact that the water flow stops, the circulation diameter of the electronic expansion valve is larger than that of the defrosting electromagnetic valve, most of the refrigerant enters the heat accumulator through the defrosting electromagnetic valve, the temperature of the refrigerant is lower than that of the heat accumulator, the heat accumulator exchanges heat stored in normal work into the refrigerant, the temperature of the refrigerant is increased, the refrigerant enters the fin heat exchanger subsequently, the defrosting process is completed, and defrosting efficiency is higher.
Description
Technical Field
The utility model relates to a heat pump set technical field, in particular to carbon dioxide heat pump heat accumulation defrost system.
Background
A heat pump is a device for transferring heat energy of a low-temperature heat source to a high-temperature heat source to perform cooling and heating. The carbon dioxide heat pump heats based on the supercritical circulation of carbon dioxide, and generally comprises a compressor, a gas cooler, an expansion valve and an evaporator, wherein the compressor sucks a low-temperature and low-pressure carbon dioxide refrigerant from the evaporator, the carbon dioxide refrigerant is compressed into a high-temperature and high-pressure supercritical fluid by acting, the high-temperature and high-pressure supercritical fluid enters the gas cooler to exchange heat with water, the high-temperature and high-pressure supercritical fluid is cooled into high-pressure fluid in the gas cooler to release a large amount of heat, and the water absorbs the released heat to continuously increase the temperature; after the high-pressure fluid is throttled and depressurized by an expansion valve, the high-pressure fluid absorbs the heat in the ambient air in the evaporator under the action of a fan to be evaporated into low-pressure gas, and the low-pressure gas is sucked into a compressor to be compressed, and the low-pressure gas is repeatedly circulated to prepare hot water. However, when the external environment temperature is low, especially in winter, the fins of the evaporator are easy to frost, along with the thickening of the frost layer, the heat exchange between air and the fins is blocked, the heat exchange is weakened, the heating effect is reduced, and the normal heating of the system is affected, so that the defrosting treatment needs to be carried out on the evaporator.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model aims at providing a carbon dioxide heat pump heat accumulation defrost system that defrosting efficiency is higher.
In order to realize the purpose of the utility model, the utility model adopts the following technical scheme:
a carbon dioxide heat pump heat storage defrosting system comprises:
a compressor;
the gas cooler is internally provided with a first heat exchange pipeline and a heat exchange water path which exchange heat with each other, and the heat exchange water path is connected with a water pump;
the heat accumulator is internally provided with a second heat exchange pipeline and a third heat exchange pipeline which exchange heat with each other;
an electronic expansion valve;
a defrost solenoid valve having a flow diameter less than a flow diameter of the electronic expansion valve;
the evaporator is provided with a fan and a fin heat exchange pipeline;
the compressor, the first heat exchange pipeline of the gas cooler, the second heat exchange pipeline of the heat accumulator, the electronic expansion valve and the fin heat exchange pipeline of the evaporator are sequentially communicated to form a main loop for circulating the carbon dioxide refrigerant;
the carbon dioxide heat pump heat storage defrosting system has a defrosting working state, the water pump is in a non-working state under the defrosting working state, the defrosting electromagnetic valve is in an open state, and the first heat exchange pipeline of the compressor and the gas cooler, the second heat exchange pipeline of the heat accumulator, the defrosting electromagnetic valve, the third heat exchange pipeline of the heat accumulator and the fin heat exchange pipeline of the evaporator are sequentially communicated to form a defrosting loop for carbon dioxide refrigerant circulation.
The utility model discloses a set up heat accumulator and defrosting solenoid valve, when external environment temperature is lower and need defrost the evaporimeter, the system gets into defrosting operating condition: at the moment, water flow stops, the defrosting electromagnetic valve is opened, the refrigerant discharged by the compressor enters the gas cooler, the gas cooler cannot exchange heat due to the fact that the water flow stops, the circulation diameter of the electronic expansion valve is larger than that of the defrosting electromagnetic valve, most of the refrigerant enters the heat accumulator through the defrosting electromagnetic valve, the temperature of the refrigerant is lower than that of the heat accumulator, the heat accumulator exchanges heat stored in normal work into the refrigerant, the temperature of the refrigerant is increased, the refrigerant enters the fin heat exchanger subsequently, the defrosting process is completed, and defrosting efficiency is higher.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
wherein: 1. a compressor; 2. a gas cooler; 21. a first heat exchange line; 22. a heat exchange waterway; 23. a water pump; 3. a heat accumulator; 31. a second heat exchange line; 32. a third heat exchange line; 4. an electronic expansion valve; 5. a defrosting solenoid valve; 6. an evaporator; 61. a fan; 62. fin heat exchange pipeline.
Detailed Description
To explain the technical content, structural features, achieved objects and functions of the present invention in detail, the following detailed description is made with reference to the accompanying drawings.
As shown in fig. 1, the carbon dioxide heat pump heat storage defrosting system includes a compressor 1, a gas cooler 2, a heat storage 3, an electronic expansion valve 4, a defrosting solenoid valve 5, and an evaporator 6.
The gas cooler 2 is internally provided with a first heat exchange pipeline 21 and a heat exchange water channel 22 which exchange heat with each other, and the heat exchange water channel 22 is connected with a water pump 23. The regenerator 3 internally has a second heat-exchange line 31 and a third heat-exchange line 32, which exchange heat with each other. The defrost solenoid valve 5, which has a smaller flow diameter than the electronic expansion valve 4, causes most of the refrigerant to pass through the defrost solenoid valve 5 when the defrost solenoid valve 5 is open. The evaporator 6 has a fan 61 and a fin heat exchange line 62. The compressor 1, the first heat exchange pipeline 21 of the gas cooler 2, the second heat exchange pipeline 31 of the heat accumulator 3, the electronic expansion valve 4 and the fin heat exchange pipeline 62 of the evaporator 6 are sequentially communicated to form a main loop for circulating the carbon dioxide refrigerant.
The system is in a normal working state: the compressor 1 discharges high-temperature and high-pressure refrigerant to enter the gas cooler 2, heat is absorbed by water to form medium-temperature and high-pressure refrigerant, the medium-temperature and high-pressure refrigerant enters the heat accumulator 3, the heat is absorbed again, and the heat accumulator 3 stores the heat inside. At this time, the defrosting solenoid valve 5 is in a closed state, and the refrigerant enters the electronic expansion valve 4, is throttled into a low-temperature low-pressure liquid refrigerant, enters the fin heat exchange pipeline 62, exchanges heat with air, finally forms a gas refrigerant, and enters the compressor 1 to complete the main loop cycle.
The system is in a defrosting working state: at this moment, the water pump 23 stops working, the water flow of the heat exchange water path 22 stops, the defrosting solenoid valve 5 is opened, the refrigerant discharged by the compressor 1 enters the gas cooler 2, the gas cooler 2 cannot exchange heat due to the stop of the water flow, the circulation diameter of the electronic expansion valve 4 is much larger than that of the defrosting solenoid valve 5, most of the refrigerant enters the heat accumulator 3 through the defrosting solenoid valve 5, the temperature of the refrigerant is lower than that of the heat accumulator 3 at this moment, the heat accumulator 3 exchanges the heat stored in the normal work into the refrigerant, the temperature of the refrigerant is increased, and then the refrigerant enters the fin heat exchange pipeline 62 to complete the defrosting process.
The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose of the embodiments is to enable people skilled in the art to understand the contents of the present invention and to implement the present invention, which cannot limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.
Claims (1)
1. A carbon dioxide heat pump heat storage defrosting system is characterized by comprising:
a compressor (1);
the gas cooler (2) is internally provided with a first heat exchange pipeline (21) and a heat exchange water channel (22) which exchange heat with each other, and the heat exchange water channel (22) is connected with a water pump (23);
the heat accumulator (3) is internally provided with a second heat exchange pipeline (31) and a third heat exchange pipeline (32) which exchange heat with each other;
an electronic expansion valve (4);
the circulation diameter of the defrosting solenoid valve (5) is smaller than that of the electronic expansion valve (4);
an evaporator (6) having a fan (61) and a fin heat exchange line (62);
the compressor (1), the first heat exchange pipeline (21) of the gas cooler (2), the second heat exchange pipeline (31) of the heat accumulator (3), the electronic expansion valve (4) and the fin heat exchange pipeline (62) of the evaporator (6) are sequentially communicated to form a main loop for circulating a carbon dioxide refrigerant;
carbon dioxide heat pump heat accumulation defrost system have the defrosting operating condition, under the defrosting operating condition, water pump (23) be in off-working condition, defrosting solenoid valve (5) be in the open mode, fin heat transfer pipeline (62) of first heat transfer pipeline (21) of compressor (1), gas cooler (2), second heat transfer pipeline (31) of heat accumulator (3), defrosting solenoid valve (5), third heat transfer pipeline (32) of heat accumulator (3), evaporimeter (6) be linked together in proper order and constitute the defrosting return circuit that supplies carbon dioxide refrigerant circulation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922150804.0U CN211147002U (en) | 2019-12-04 | 2019-12-04 | Carbon dioxide heat pump heat storage defrosting system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922150804.0U CN211147002U (en) | 2019-12-04 | 2019-12-04 | Carbon dioxide heat pump heat storage defrosting system |
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| Publication Number | Publication Date |
|---|---|
| CN211147002U true CN211147002U (en) | 2020-07-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922150804.0U Active CN211147002U (en) | 2019-12-04 | 2019-12-04 | Carbon dioxide heat pump heat storage defrosting system |
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| Country | Link |
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| CN (1) | CN211147002U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112594983A (en) * | 2020-12-08 | 2021-04-02 | 格力电器（合肥）有限公司 | Refined forward circulating deicing system of air conditioner and control method |
| CN112902514A (en) * | 2019-12-04 | 2021-06-04 | 江苏金通灵光核能源科技有限公司 | Carbon dioxide heat pump heat storage defrosting system |
-
2019
- 2019-12-04 CN CN201922150804.0U patent/CN211147002U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112902514A (en) * | 2019-12-04 | 2021-06-04 | 江苏金通灵光核能源科技有限公司 | Carbon dioxide heat pump heat storage defrosting system |
| CN112594983A (en) * | 2020-12-08 | 2021-04-02 | 格力电器（合肥）有限公司 | Refined forward circulating deicing system of air conditioner and control method |
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| TR01 | Transfer of patent right |
Effective date of registration: 20210407 Address after: 214000 No.101, Antai 1st Road, economic and Technological Development Zone, Xishan District, Wuxi City, Jiangsu Province Patentee after: Jiangsu Jintong Lingguang Nuclear Energy Technology Co.,Ltd. Address before: 215500 room 503, building 3, mingshifang, Changshu old street, Greenland, Yushan Town, Changshu City, Suzhou City, Jiangsu Province Patentee before: Dai Qi |