CN110608539A - Cascade high-temperature heat pump system - Google Patents
Cascade high-temperature heat pump system Download PDFInfo
- Publication number
- CN110608539A CN110608539A CN201911071024.5A CN201911071024A CN110608539A CN 110608539 A CN110608539 A CN 110608539A CN 201911071024 A CN201911071024 A CN 201911071024A CN 110608539 A CN110608539 A CN 110608539A
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- China
- Prior art keywords
- heat exchanger
- condenser
- valve
- passage
- pump system
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- 239000007788 liquid Substances 0.000 claims abstract description 26
- 238000000926 separation method Methods 0.000 claims abstract description 22
- 230000005494 condensation Effects 0.000 claims abstract description 8
- 238000009833 condensation Methods 0.000 claims abstract description 8
- 238000001816 cooling Methods 0.000 claims abstract description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 238000005057 refrigeration Methods 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B13/00—Compression machines, plants or systems, with reversible cycle
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
- F25B43/006—Accumulators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
- F25B43/02—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat for separating lubricants from the refrigerant
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B7/00—Compression machines, plants or systems, with cascade operation, i.e. with two or more circuits, the heat from the condenser of one circuit being absorbed by the evaporator of the next circuit
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Power Engineering (AREA)
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
Abstract
The invention relates to a cascade high-temperature heat pump system, which comprises a condenser, a condensing evaporator and an air-cooled heat exchanger, wherein the condenser and the condensing evaporator are connected to form a condenser side loop; the heat exchanger side loop comprises a heat exchanger side first passage and a heat exchanger side second passage; the first passage of the heat exchange side comprises a four-way reversing valve, an oil separator A, a low-temperature stage compressor and an air separation device which are sequentially connected from a condensation evaporator to an air cooling heat exchanger through pipelines, the other two interfaces of the four-way reversing valve are respectively communicated with an inlet and an outlet of the air separation device through pipelines, and a backflow pipeline with an electromagnetic valve is arranged between the oil separator A and the low-temperature stage compressor; and a liquid storage tank is arranged on the pipeline of the second passage at the heat exchanger side. The heat pump system designed by the application can meet the water outlet requirement of more than 60 ℃ at the ambient temperature lower than-25 ℃, and can realize higher operation energy efficiency of the refrigerating system.
Description
Technical Field
The invention relates to a cascade high-temperature heat pump system, and belongs to the technical field of heat pump systems.
Background
At present, the common low-temperature air source heat pump units in the market all adopt a single-stage compression refrigeration system to operate, and the operation effect is good when refrigeration is carried out in summer. When the air conditioner runs in winter, the refrigeration efficiency is extremely low, and even the air conditioner cannot be normally started when the air conditioner runs in extremely cold regions such as northeast and the like. At present, a common method for solving the problems is to adopt a scheme of adding electric auxiliary heating to solve the problems of unstable operation and the like caused by low water temperature during initial starting, and the heating efficiency of the mode is lower than that of compression heating.
Disclosure of Invention
The invention provides a cascade high-temperature heat pump system aiming at the problem that the existing heat pump system has poor applicability in extremely cold regions.
The technical scheme for solving the technical problems is as follows: a cascade high-temperature heat pump system is characterized by comprising a condenser, a condensing evaporator and an air-cooled heat exchanger, wherein the condenser and the condensing evaporator are connected to form a condenser side loop;
the heat exchanger side loop comprises a heat exchanger side first passage and a heat exchanger side second passage; the first passage of the heat exchange side comprises a four-way reversing valve, an oil separator A, a low-temperature stage compressor and an air separation device which are sequentially connected from a condensation evaporator to an air cooling heat exchanger through pipelines, the other two interfaces of the four-way reversing valve are respectively communicated with an inlet and an outlet of the air separation device through pipelines, and a backflow pipeline with an electromagnetic valve is arranged between the oil separator A and the low-temperature stage compressor; and a liquid storage tank is arranged on the pipeline of the second passage at the heat exchanger side.
Four ports of the four-way reversing valve in the technical scheme are respectively connected to the high-pressure end and the low-pressure end of the low-temperature section compressor and the inlet pipeline and the outlet pipeline of the condensation evaporator gas separation device. The air side heat exchanger is an air-cooled heat exchanger, and the condenser is a shell-tube type, sleeve-tube type or plate type heat exchanger.
On the basis of the technical scheme, in order to achieve the convenience of use and the stability of equipment, the invention can also make the following improvements on the technical scheme:
further, the condenser-side circuit includes a condenser-side first passage and a condenser-side second passage; the first passage at the condenser side comprises an oil separator B, a high-temperature section compressor and a gas-liquid separator which are sequentially connected from the condenser to the condensation evaporator through pipelines, and the oil separator B and the high-temperature section compressor are provided with return pipelines with electromagnetic valves; and an expansion valve and an electromagnetic valve are arranged on a pipeline of the second passage at the cooler side.
Further, the gas separation device is an R404A gas separation device; the condenser is an R134A condenser, and the liquid storage tank is an R404A liquid storage tank.
Further, a suction filter is arranged on a pipeline between the low-temperature stage compressor and the gas separation device; and the pipeline of the high-temperature section compressor and the gas-liquid separator is provided with a suction filter.
Furthermore, a check valve is arranged on a pipeline of the low-temperature stage compressor to the oil separator A.
Furthermore, an expansion valve and an electromagnetic valve are arranged on a pipeline between the air-cooled heat exchanger and the liquid storage device.
Furthermore, a stop valve is arranged on a pipeline between the condenser and the oil separator B; a stop valve is arranged on a pipeline between the gas-liquid separator and the condensing evaporator; a stop valve is arranged between the condensing evaporator and the four-way reversing valve; a stop valve is arranged between the oil separator and the one-way valve in a hidden way; a stop valve is arranged between the condensing evaporator and the liquid storage device; the inlet pipeline and the outlet pipeline of the gas separation device are respectively provided with a stop valve.
Furthermore, the low-temperature stage compressor adopts a semi-closed screw compressor, and the high-temperature stage compressor adopts a fully-closed scroll compressor.
The invention has the advantages that: through the reasonable design of pipeline connection, the structure of the air conditioner can be applied to a low-temperature environment, the water outlet requirement of more than 60 ℃ is met at the environment temperature lower than minus 25 ℃, and the high operation energy efficiency of a refrigerating system can be realized. The system can solve the problems of low energy efficiency and the like when the traditional low-temperature air-cooled heat pump system operates in the north China and the northeast China in extremely cold weather in winter.
Drawings
Fig. 1 is a schematic structural diagram of a cascade high-temperature heat pump system according to the present application.
The reference numbers are recorded as follows: the system comprises a condenser 1, a condensing evaporator 2, an air cooling heat exchanger 3, a four-way reversing valve 4, an oil separator A5, a low-temperature stage compressor 6, an air separation device 7, a liquid storage tank 8, an oil separator B9, a high-temperature stage compressor 10 and a gas-liquid separator 11.
Detailed Description
The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the invention.
A cascade high-temperature heat pump system (see figure 1) comprises a condenser 1, a condensing evaporator 2 and an air-cooled heat exchanger 3, wherein the condenser 1 and the condensing evaporator 2 are connected to form a condenser side loop, and the air-cooled heat exchanger 3 and the condensing evaporator 2 are connected to form a heat exchanger side loop;
the heat exchanger side loop comprises a heat exchanger side first passage and a heat exchanger side second passage; the first passage of the heat exchange side comprises a four-way reversing valve 4, an oil separator A5, a low-temperature stage compressor and an air separation device 7 which are sequentially connected from a condensation evaporator 2 to an air cooling heat exchanger 3 through pipelines, the other two interfaces of the four-way reversing valve 4 are respectively communicated with an inlet and an outlet of the air separation device 7 through pipelines, and a backflow pipeline with an electromagnetic valve is arranged between the oil separator A5 and the low-temperature stage compressor 6; a liquid storage tank 8 is arranged on a pipeline of the second passage at the heat exchanger side;
the condenser side loop comprises a condenser side first passage and a condenser side second passage; the first path on the condenser side comprises an oil separator B9, a high-temperature stage compressor 10 and a gas-liquid separator 11 which are sequentially connected from the condenser 1 to the condensation evaporator 2 through pipelines, wherein the oil separator B9 and the high-temperature stage compressor 10 are provided with a return pipeline with an electromagnetic valve; and an expansion valve and an electromagnetic valve are arranged on a pipeline of the second passage at the cooler side.
In the above embodiment, the gas separation device 7 is an R404A gas separation device; the condenser 1 is an R134A condenser, and the liquid storage tank 8 is an R404A liquid storage tank; a suction filter is arranged on a pipeline between the low-temperature section compressor 4 and the gas separation device 7; a suction filter is arranged on the pipeline of the high-temperature section compressor 10 and the gas-liquid separator 11; a check valve is arranged on a pipeline from the low-temperature stage compressor 6 to the oil separator A5; an expansion valve and an electromagnetic valve are arranged on a pipeline between the air-cooled heat exchanger 3 and the liquid reservoir 8; a stop valve is arranged on a pipeline between the condenser 1 and the oil separator B9; a stop valve is arranged on a pipeline between the gas-liquid separator 11 and the condensing evaporator 2; a stop valve is arranged between the condensing evaporator 2 and the four-way reversing valve 4; a stop valve is arranged between the oil separator 5 and the one-way valve in a hidden way; a stop valve is arranged between the condensing evaporator 2 and the liquid storage device 8; the inlet pipeline and the outlet pipeline of the gas separation device 7 are respectively provided with a stop valve; the low-temperature stage compressor adopts a semi-closed screw compressor, and the high-temperature stage compressor adopts a fully-closed scroll compressor.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (8)
1. The cascade high-temperature heat pump system is characterized by comprising a condenser (1), a condensing evaporator (2) and an air-cooled heat exchanger (3), wherein the condenser (1) and the condensing evaporator (2) are connected to form a condenser side loop, and the air-cooled heat exchanger (3) and the condensing evaporator (2) are connected to form a heat exchanger side loop;
the heat exchanger side loop comprises a heat exchanger side first passage and a heat exchanger side second passage; the first passage of the heat exchange side comprises a four-way reversing valve (4), an oil separator A (5), a low-temperature section compressor and an air separation device (7) which are sequentially connected from a condensation evaporator (2) to an air cooling heat exchanger (3) through pipelines, the other two interfaces of the four-way reversing valve (4) are respectively communicated with an inlet and an outlet of the air separation device (7) through pipelines, and a backflow pipeline with an electromagnetic valve is arranged between the oil separator A (5) and the low-temperature section compressor (6); and a liquid storage tank (8) is arranged on the pipeline of the second passage at the heat exchanger side.
2. The cascade high temperature heat pump system according to claim 1, wherein said condenser side loop comprises a condenser side first passage and a condenser side second passage; the first path on the condenser side comprises an oil separator B (9), a high-temperature section compressor (10) and a gas-liquid separator (11) which are sequentially connected from the condenser (1) to the condensation evaporator (2) through pipelines, and the oil separator B (9) and the high-temperature section compressor (10) are provided with return pipelines with electromagnetic valves; and an expansion valve and an electromagnetic valve are arranged on a pipeline of the second passage at the cooler side.
3. The cascade high temperature heat pump system according to claim 1 or 2, wherein said air separation unit (7) is an R404A air separation unit; the condenser (1) is an R134A condenser, and the liquid storage tank (8) is an R404A liquid storage tank.
4. The cascade high temperature heat pump system according to claim 3, wherein a suction filter is installed in the pipe between the low temperature stage compressor (4) and the air separation unit (7); and a suction filter is arranged on the pipeline of the high-temperature section compressor (10) and the gas-liquid separator (11).
5. The cascade high temperature heat pump system according to claim 4, wherein said low temperature stage compressor (6) is provided with a check valve in the line to the oil separator A (5).
6. The cascade high temperature heat pump system according to claim 5, wherein an expansion valve and a solenoid valve are provided in the conduit between the air-cooled heat exchanger (3) and the accumulator (8).
7. The cascade high temperature heat pump system according to claim 6, wherein a shut-off valve is installed in the pipe between the condenser (1) and the oil separator B (9); a stop valve is arranged on a pipeline between the gas-liquid separator (11) and the condensing evaporator (2); a stop valve is arranged between the condensing evaporator (2) and the four-way reversing valve (4); a stop valve is arranged between the oil separator (5) and the one-way valve in a concealed way; a stop valve is arranged between the condensing evaporator (2) and the liquid storage device (8); the inlet pipeline and the outlet pipeline of the gas separation device (7) are respectively provided with a stop valve.
8. The cascade high temperature heat pump system according to claim 1, wherein the low temperature stage compressor is a semi-hermetic screw compressor and the high temperature stage compressor is a hermetic scroll compressor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911071024.5A CN110608539A (en) | 2019-11-05 | 2019-11-05 | Cascade high-temperature heat pump system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911071024.5A CN110608539A (en) | 2019-11-05 | 2019-11-05 | Cascade high-temperature heat pump system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110608539A true CN110608539A (en) | 2019-12-24 |
Family
ID=68895703
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911071024.5A Pending CN110608539A (en) | 2019-11-05 | 2019-11-05 | Cascade high-temperature heat pump system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110608539A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024071213A1 (en) * | 2022-09-30 | 2024-04-04 | ダイキン工業株式会社 | Refrigeration cycle device |
| WO2024071214A1 (en) * | 2022-09-30 | 2024-04-04 | ダイキン工業株式会社 | Refrigeration cycle device |
| WO2024071215A1 (en) * | 2022-09-30 | 2024-04-04 | ダイキン工業株式会社 | Refrigeration cycle device |
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| CN201903165U (en) * | 2010-12-17 | 2011-07-20 | 宁波天海制冷设备有限公司 | Household ultralow-temperature heat pump hot water unit |
| CN104236164A (en) * | 2014-09-15 | 2014-12-24 | 美意(浙江)空调设备有限公司 | Ultra-high temperature cascade water source heat pump system |
| CN108759144A (en) * | 2018-07-21 | 2018-11-06 | 青岛奥利凯中央空调有限公司 | A kind of superposition type ultra-low temperature air source heat pump unit and its control method |
| CN208254010U (en) * | 2018-04-19 | 2018-12-18 | 董建 | A kind of full working scope air-source superposition type high-temperature-hot-water heat pump unit |
| CN209246449U (en) * | 2018-12-20 | 2019-08-13 | 北京永源热泵有限责任公司 | The high leaving water temperature superposition type Air-Cooled Heat Pump Unit of ultralow temperature |
| CN211290622U (en) * | 2019-11-05 | 2020-08-18 | 烟台欧森纳地源空调股份有限公司 | Cascade high-temperature heat pump system |
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2019
- 2019-11-05 CN CN201911071024.5A patent/CN110608539A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN201903165U (en) * | 2010-12-17 | 2011-07-20 | 宁波天海制冷设备有限公司 | Household ultralow-temperature heat pump hot water unit |
| CN104236164A (en) * | 2014-09-15 | 2014-12-24 | 美意(浙江)空调设备有限公司 | Ultra-high temperature cascade water source heat pump system |
| CN208254010U (en) * | 2018-04-19 | 2018-12-18 | 董建 | A kind of full working scope air-source superposition type high-temperature-hot-water heat pump unit |
| CN108759144A (en) * | 2018-07-21 | 2018-11-06 | 青岛奥利凯中央空调有限公司 | A kind of superposition type ultra-low temperature air source heat pump unit and its control method |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024071213A1 (en) * | 2022-09-30 | 2024-04-04 | ダイキン工業株式会社 | Refrigeration cycle device |
| WO2024071214A1 (en) * | 2022-09-30 | 2024-04-04 | ダイキン工業株式会社 | Refrigeration cycle device |
| WO2024071215A1 (en) * | 2022-09-30 | 2024-04-04 | ダイキン工業株式会社 | Refrigeration cycle device |
| JP7578885B2 (en) | 2022-09-30 | 2024-11-07 | ダイキン工業株式会社 | Refrigeration Cycle Equipment |
| JP7578883B2 (en) | 2022-09-30 | 2024-11-07 | ダイキン工業株式会社 | Refrigeration Cycle Equipment |
| JP7578884B2 (en) | 2022-09-30 | 2024-11-07 | ダイキン工業株式会社 | Refrigeration Cycle Equipment |
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