CN114877395A - Low-temperature heat pump heating system - Google Patents
Low-temperature heat pump heating system Download PDFInfo
- Publication number
- CN114877395A CN114877395A CN202210530639.5A CN202210530639A CN114877395A CN 114877395 A CN114877395 A CN 114877395A CN 202210530639 A CN202210530639 A CN 202210530639A CN 114877395 A CN114877395 A CN 114877395A
- Authority
- CN
- China
- Prior art keywords
- heat exchanger
- electronic expansion
- gas
- expansion valve
- enthalpy
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000010438 heat treatment Methods 0.000 title claims abstract description 16
- 239000007788 liquid Substances 0.000 claims abstract description 33
- 239000002131 composite material Substances 0.000 claims abstract description 23
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 17
- 238000010793 Steam injection (oil industry) Methods 0.000 claims abstract description 8
- 239000003507 refrigerant Substances 0.000 abstract description 7
- 230000002035 prolonged effect Effects 0.000 abstract description 2
- 230000004075 alteration Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000004781 supercooling Methods 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D3/00—Hot-water central heating systems
- F24D3/18—Hot-water central heating systems using heat pumps
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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
- F25B41/00—Fluid-circulation arrangements
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
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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
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
- F25B41/31—Expansion valves
- F25B41/34—Expansion valves with the valve member being actuated by electric means, e.g. by piezoelectric actuators
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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
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
- Heat-Pump Type And Storage Water Heaters (AREA)
Abstract
A low-temperature heat pump heating system comprises an enthalpy-increasing compressor, a four-way valve, a heat exchanger, a water side heat exchanger, a main path electronic expansion valve, an auxiliary path electronic expansion valve and a composite oil-liquid separator, wherein the enthalpy-increasing compressor, the D-E end of the four-way valve, the water side heat exchanger and a second inlet pipe and a second outlet pipe of the composite oil-liquid separator are communicated with a pipeline between the main path electronic expansion valve and the auxiliary path electronic expansion valve; the main electronic expansion valve, the heat exchanger, the C-S end of the four-way valve, the first inlet pipe and the first outlet pipe of the composite gas-liquid separator are communicated with an air return pipe of the enthalpy-increasing compressor; the auxiliary electronic expansion valve and the gas-liquid heat exchanger of the composite gas-liquid separator are communicated with the steam injection port of the enthalpy-increasing compressor. The high-temperature medium-pressure refrigerant flowing out of the water side heat exchanger exchanges heat with low-temperature low-pressure gas from the heat exchanger and medium-temperature low-pressure refrigerant from the auxiliary electronic expansion valve, and the gas entering the gas return pipe and the steam injection pipe keeps the superheat degree, so that the working efficiency of the enthalpy-increasing compressor is improved, and the service life of the enthalpy-increasing compressor is prolonged.
Description
Technical Field
The invention relates to the technical field of air source heat pumps, in particular to a low-temperature air source heat pump unit.
Background
At present, in the prior art, chinese patent 201921754862.8 discloses a low-temperature frequency conversion cascade high-temperature air source heat pump unit, which includes a low-temperature stage system and a high-temperature stage system, wherein the two stage systems are connected through an intermediate economizer. The low-temperature stage system comprises a low-temperature stage compressor, a pressure sensor, a temperature sensor, a four-way valve, a finned heat exchanger, a filter, a throttling device, a one-way valve, a regenerative gas-liquid separator and an electromagnetic valve. The high-temperature stage system comprises a high-temperature stage compressor, a gas-liquid separator, a drying filter and a water side heat exchanger. The unit can maintain the stable and efficient operation of a high-temperature-level system through the stepless speed change of the low-temperature-level compressor according to the change of the environment temperature and the operation states of the high-temperature-level compressor, the low-temperature-level compressor, the high-temperature-level compressor and the high-temperature-level compressor, so that the unit can prepare high-temperature hot water at 85 ℃ in an ultra-wide environment temperature range of-30 ℃ to 40 ℃. There are problems in that: the two compressors are arranged, so that the structure is complex; the gas temperature of the vapor injection port of the compressor is low.
Disclosure of Invention
The purpose of the invention is: a low-temperature heat pump heating system is provided, which can keep the superheat degree of a return pipe and a steam jet orifice and improve the working efficiency of a compressor.
The invention is realized by the following steps: a low-temperature heat pump heating system is characterized in that: it comprises an enthalpy-increasing compressor, a four-way valve, a heat exchanger, a water side heat exchanger, a main path electronic expansion valve, an auxiliary path electronic expansion valve and a composite gas-liquid separator,
the enthalpy-increasing compressor, the D-E end of the four-way valve, the water side heat exchanger, a second inlet pipe and a second outlet pipe of the composite oil-liquid separator are communicated with a pipeline between the main-path electronic expansion valve and the auxiliary-path electronic expansion valve;
the main electronic expansion valve, the heat exchanger, the C-S end of the four-way valve, the first inlet pipe and the first outlet pipe of the composite gas-liquid separator are communicated with an air return pipe of the enthalpy-increasing compressor;
the auxiliary electronic expansion valve and the gas-liquid heat exchanger of the composite gas-liquid separator are communicated with a steam injection port of the enthalpy-increasing compressor;
the composite gas-liquid separator keeps the gas entering the gas return pipe and the steam jet orifice superheated.
The low-temperature heat pump heating system is characterized in that: the composite gas-liquid separator comprises a first tank body, a first inlet pipe and a first outlet pipe which are communicated with the first tank body, a second inlet pipe and a second outlet pipe which are communicated with the second tank body, and a gas-liquid heat exchanger arranged in the second tank body, wherein the first tank body and the second tank body exchange heat.
The low-temperature heat pump heating system is characterized in that: the first tank body is embedded into the second tank body.
The low-temperature heat pump heating system is characterized in that: the heat exchanger is a finned heat exchanger.
The low-temperature heat pump heating system is characterized in that: the water side heat exchanger is a double-channel heat exchanger.
According to the low-temperature heat pump heating system, the composite gas-liquid separator is arranged, the high-temperature medium-pressure refrigerant flowing out of the water side heat exchanger exchanges heat with the low-temperature low-pressure gas from the heat exchanger and the medium-temperature low-pressure refrigerant from the auxiliary electronic expansion valve, the gas entering the gas return pipe and the steam injection pipe keeps the superheat degree, the working efficiency of the enthalpy-increasing compressor is improved, and the service life is prolonged.
Drawings
FIG. 1 is a flow chart of the present invention.
FIG. 2 is a schematic view of the composite gas-liquid separator of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in fig. 1, a low temperature heat pump heating system comprises an enthalpy-increasing compressor 1, a four-way valve 2, a heat exchanger 3, a water side heat exchanger 4, a main circuit electronic expansion valve 51, an auxiliary circuit electronic expansion valve 52 and a composite oil-liquid separator 6,
the enthalpy-increasing compressor 1, the D-E end of the four-way valve 2, the water side heat exchanger 4, the second inlet pipe 621 and the second outlet pipe 622 of the composite oil-liquid separator 6 are communicated with the pipelines between the main electronic expansion valve 51 and the auxiliary electronic expansion valve 52;
the main electronic expansion valve 51, the heat exchanger 3, the C-S end of the four-way valve 2, the first inlet pipe 611 and the first outlet pipe 612 of the composite gas-liquid separator 6 are communicated with the air return pipe 1A of the enthalpy-increasing compressor 1;
the auxiliary electronic expansion valve 52 and the gas-liquid heat exchanger 63 of the composite gas-liquid separator 6 are communicated with the steam injection port 1B of the enthalpy-increasing compressor 1;
the combined gas-liquid separator 6 keeps the gas entering the gas return and the steam injection ports superheated.
As shown in fig. 2, the composite gas-liquid separator 6 includes a first tank 6A, a first inlet pipe 611 and a first outlet pipe 612 that are communicated with the first tank 6A, a second tank 6B, a second inlet pipe 621 and a second outlet pipe 622 that are communicated with the second tank 6B, and a gas-liquid heat exchanger 63 provided in the second tank 6B, and the first tank 6A and the second tank 6B exchange heat.
The first tank 6A is embedded in the second tank 6B.
The heat exchanger 3 is a finned heat exchanger.
The water side heat exchanger 4 is a double-channel heat exchanger.
The medium-temperature high-pressure refrigerant flowing out of the water side heat exchanger 4 exchanges heat with low-temperature low-pressure gas from the heat exchanger 3 and low-temperature medium-pressure refrigerant from the auxiliary electronic expansion valve 52, and the gas entering the gas return pipe 1A and the steam injection pipe 1B keeps the superheat degree; the supercooling degree of the water side heat exchanger 4 is ensured to be sufficient, meanwhile, the superheat degree of a low-pressure cavity and a medium-pressure cavity of the compressor is improved after the low-temperature refrigerant absorbs heat, the running power consumption of the unit can be reduced, and the stability and the reliability of the unit can be improved.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (5)
1. A low temperature heat pump heating system which characterized in that: it comprises an enthalpy-increasing compressor, a four-way valve, a heat exchanger, a water side heat exchanger, a main path electronic expansion valve, an auxiliary path electronic expansion valve and a composite oil-liquid separator,
the enthalpy-increasing compressor, the D-E end of the four-way valve, the water side heat exchanger, a second inlet pipe and a second outlet pipe of the composite oil-liquid separator are communicated with a pipeline between the main-path electronic expansion valve and the auxiliary-path electronic expansion valve;
the main electronic expansion valve, the heat exchanger, the C-S end of the four-way valve, the first inlet pipe and the first outlet pipe of the composite gas-liquid separator are communicated with an air return pipe of the enthalpy-increasing compressor;
the auxiliary electronic expansion valve and the gas-liquid heat exchanger of the composite gas-liquid separator are communicated with a steam injection port of the enthalpy-increasing compressor;
the composite gas-liquid separator keeps the gas entering the gas return pipe and the steam jet orifice superheated.
2. The low temperature heat pump heating system according to claim 1, wherein: the composite gas-liquid separator comprises a first tank body, a first inlet pipe and a first outlet pipe which are communicated with the first tank body, a second inlet pipe and a second outlet pipe which are communicated with the second tank body, and a gas-liquid heat exchanger arranged in the second tank body, wherein the first tank body and the second tank body exchange heat.
3. The low temperature heat pump heating system according to claim 2, wherein: the first tank body is embedded into the second tank body.
4. A low temperature heat pump heating system according to claim 1, 2 or 3, wherein: the heat exchanger is a finned heat exchanger.
5. A low temperature heat pump heating system according to claim 1, 2 or 3, wherein: the water side heat exchanger is a double-channel heat exchanger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210530639.5A CN114877395B (en) | 2022-05-16 | 2022-05-16 | Low-temperature heat pump heating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210530639.5A CN114877395B (en) | 2022-05-16 | 2022-05-16 | Low-temperature heat pump heating system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114877395A true CN114877395A (en) | 2022-08-09 |
| CN114877395B CN114877395B (en) | 2024-08-13 |
Family
ID=82675757
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210530639.5A Active CN114877395B (en) | 2022-05-16 | 2022-05-16 | Low-temperature heat pump heating system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114877395B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES2043925T3 (en) * | 1988-04-25 | 1994-01-01 | Mitsubishi Electric Corp | AIR CONDITIONING DEVICE. |
| JPH11159920A (en) * | 1997-11-27 | 1999-06-15 | Denso Corp | Refrigerating cycle device |
| CN201297813Y (en) * | 2008-10-31 | 2009-08-26 | 青岛海信日立空调系统有限公司 | Novel regenerative gas-liquid separator |
| JP2013204936A (en) * | 2012-03-28 | 2013-10-07 | Fujitsu General Ltd | Air conditioner |
| CN204535084U (en) * | 2015-01-26 | 2015-08-05 | 深圳麦克维尔空调有限公司 | Low-temperature heat pump water heater |
-
2022
- 2022-05-16 CN CN202210530639.5A patent/CN114877395B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES2043925T3 (en) * | 1988-04-25 | 1994-01-01 | Mitsubishi Electric Corp | AIR CONDITIONING DEVICE. |
| JPH11159920A (en) * | 1997-11-27 | 1999-06-15 | Denso Corp | Refrigerating cycle device |
| CN201297813Y (en) * | 2008-10-31 | 2009-08-26 | 青岛海信日立空调系统有限公司 | Novel regenerative gas-liquid separator |
| JP2013204936A (en) * | 2012-03-28 | 2013-10-07 | Fujitsu General Ltd | Air conditioner |
| CN204535084U (en) * | 2015-01-26 | 2015-08-05 | 深圳麦克维尔空调有限公司 | Low-temperature heat pump water heater |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114877395B (en) | 2024-08-13 |
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