CN113203218A - Heat pump system and control method thereof - Google Patents
Heat pump system and control method thereof Download PDFInfo
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- CN113203218A CN113203218A CN202110657002.8A CN202110657002A CN113203218A CN 113203218 A CN113203218 A CN 113203218A CN 202110657002 A CN202110657002 A CN 202110657002A CN 113203218 A CN113203218 A CN 113203218A
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- 238000000034 method Methods 0.000 title claims abstract description 16
- 230000007246 mechanism Effects 0.000 claims abstract description 123
- 238000004781 supercooling Methods 0.000 claims abstract description 42
- 239000003507 refrigerant Substances 0.000 claims abstract description 33
- 238000002347 injection Methods 0.000 claims abstract description 28
- 239000007924 injection Substances 0.000 claims abstract description 28
- 230000001502 supplementing effect Effects 0.000 claims description 20
- 230000006698 induction Effects 0.000 claims description 2
- 239000013589 supplement Substances 0.000 abstract description 23
- 230000000694 effects Effects 0.000 abstract description 5
- 230000003044 adaptive effect Effects 0.000 abstract description 2
- 238000010438 heat treatment Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005057 refrigeration Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000009469 supplementation Effects 0.000 description 1
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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
-
- 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
- F25B49/022—Compressor control arrangements
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
Abstract
The invention provides a heat pump system and a control method thereof. The heat pump system comprises a compressor and a supercooling mechanism, wherein the supercooling mechanism is provided with an air supply outlet, the air suction port is communicated with the air supply outlet through a first control mechanism, and all the air supply ports are communicated with the air supply outlet through a second control mechanism respectively. According to the heat pump system and the control method thereof, the supercooling mechanism is used for performing enthalpy injection and air supplement on at least one air cylinder of the compressor, so that the working efficiency of the compressor is effectively improved, the heat exchange effect of the heat pump system is further improved, the second control mechanism can be used for controlling the air supplement position and the air supplement degree of the compressor to be adjusted, the adaptive range of the heat pump system to the environment temperature is enlarged, the flash evaporator in the prior art is replaced by the supercooling mechanism, the heat exchange quantity of a refrigerant entering the heat exchanger can be increased, and the working efficiency of the heat pump system is further increased.
Description
Technical Field
The invention relates to the technical field of air treatment equipment, in particular to a heat pump system and a control method thereof.
Background
Along with the improvement of living standard of people, the heating demand can be further increased, and the air source heat pump is widely used in the middle area of China with the advantages of high efficiency, energy conservation, environmental protection, wide applicability and convenient installation, however, when the ambient temperature is lower, the heat exchange effect of the air source heat pump system is poorer.
Disclosure of Invention
In order to solve the technical problem that a heat pump system in the prior art is poor in heat exchange effect under the condition of low ambient temperature, a heat pump system for performing enthalpy injection and air supplement on a compressor and a control method thereof are provided.
A heat pump system, comprising:
the compressor is internally provided with at least two cylinders, all the cylinders are sequentially communicated in series, at least one cylinder is provided with an air supplementing port, and the compressor is provided with an air suction port;
the supercooling mechanism is provided with an air supply outlet, the air suction port is communicated with the air supply outlet through a first control mechanism, and all the air supply ports are communicated with the air supply outlet through a second control mechanism respectively.
The compressor is also provided with an exhaust port, and all the cylinders comprise a first cylinder and at least one second cylinder which are sequentially arranged along the direction from the suction port to the exhaust port, and at least one of the second cylinders is provided with the air supplementing port.
The heat pump system further comprises an outdoor heat exchanger and an indoor heat exchanger, the supercooling mechanism is provided with a refrigerant pipeline and a supercooling pipeline, the first end of the refrigerant pipeline and the first end of the supercooling pipeline are communicated with the outdoor heat exchanger, the second end of the refrigerant pipeline is communicated with the indoor heat exchanger, and the second end of the supercooling pipeline forms the air supply outlet.
The heat pump system further comprises a first throttling mechanism, a first end of the first throttling mechanism is communicated with the outdoor heat exchanger, and a first end of the refrigerant pipeline and a first end of the supercooling pipeline are both communicated with a second end of the first throttling mechanism.
And a second throttling mechanism is arranged between the second end of the first throttling mechanism and the first end of the supercooling pipeline.
The second cylinder is provided with an air inlet, a piston is arranged in the second cylinder, and the piston sequentially sweeps the air supplementing port and the air inlet in the same second cylinder.
The heat pump system further comprises at least two indoor heat exchangers, and all the indoor heat exchangers are arranged in series.
The number of the cylinders is three, all the cylinders comprise one first cylinder and two second cylinders, and the second control mechanisms correspond to the two second cylinders one to one.
The first control mechanism is an electromagnetic valve; or the second control mechanism is an electromagnetic valve; or the first control mechanism and the second control mechanism are both electromagnetic valves.
A control method of the heat pump system includes:
the heat pump system has a normal working mode and an enthalpy injection working mode:
in a normal working mode, the first control mechanism is switched to a connected state, and all the second control mechanisms are switched to a disconnected state;
and in the enthalpy injection working mode, the first control mechanism is switched to a disconnection state, and at least one second control mechanism is switched to a connection state.
The number of the cylinders is three, all the cylinders comprise one first cylinder and two second cylinders, the second control mechanisms correspond to the two second cylinders one by one, the second control mechanisms comprise second control mechanisms a and second control mechanisms b, and the enthalpy injection working mode further comprises:
in the primary enthalpy injection mode, the second control mechanism a is switched to a connected state, and the second control mechanism b is switched to a disconnected state;
and in the second-stage enthalpy injection mode, the second control mechanism a and the second control mechanism b are switched to a communicated state.
According to the heat pump system and the control method thereof, the supercooling mechanism is used for performing enthalpy injection and air supplement on at least one air cylinder of the compressor, so that the working efficiency of the compressor is effectively improved, the heat exchange effect of the heat pump system is further improved, the second control mechanism can be used for controlling the air supplement position and the air supplement degree of the compressor to be adjusted, the adaptive range of the heat pump system to the environment temperature is enlarged, the flash evaporator in the prior art is replaced by the supercooling mechanism, the heat exchange quantity of a refrigerant entering the heat exchanger can be increased, and the working efficiency of the heat pump system is further increased.
Drawings
Fig. 1 is a schematic structural diagram of a heat pump system according to an embodiment of the heat pump system and a control method thereof provided by the present invention;
fig. 2 is a schematic structural diagram of a compressor of an embodiment of a heat pump system and a control method thereof provided by the invention;
in the figure:
1. a compressor; 11. an air supplement port; 12. an air suction port; 2. a supercooling mechanism; 3. a first control mechanism; 4. a second control mechanism; 13. an exhaust port; 14. a first cylinder; 15. a second cylinder; 5. an outdoor heat exchanger; 6. an indoor heat exchanger; 7. a first throttle mechanism; 8. and a second throttling mechanism.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The heat pump system as shown in fig. 1 and 2 includes: the compressor comprises a compressor 1, wherein at least two cylinders are arranged in the compressor 1, all the cylinders are sequentially communicated in series, at least one cylinder is provided with an air supplementing port 11, the compressor 1 is provided with an air suction port 12, and enthalpy injection and air supplement of the compressor 1 can be realized by utilizing the air supplementing port 11; the supercooling mechanism 2 is provided with an air supplement outlet, the air suction port 12 is communicated with the air supplement outlet through a first control mechanism 3, all the air supplement ports 11 are respectively communicated with the air supplement outlet through a second control mechanism 4, the supercooling mechanism 2 is used for replacing a flash generator adopted in the prior art, the supercooling of a refrigerant is realized while the enthalpy injection air supplement is carried out on the compressor 1, the heat exchange efficiency of the heat pump system is further increased, when the supercooling mechanism is used, the working states of the first control mechanism 3 and the second control mechanism 4 are controlled according to the environment temperature of the heat pump system, so that the purposes of not carrying out the enthalpy injection air supplement on the compressor 1 and carrying out the enthalpy injection air supplement on the compressor 1 are realized, particularly when the environment temperature is too low, the multiple air supplement ports 11 are used for supplementing air to multiple cylinders of the compressor 1, and the multistage enthalpy injection air supplement of the compressor 1 is realized, thereby the heat exchange efficiency of the heat pump system reaches the requirement.
Still be provided with gas vent 13 on the compressor 1, follow induction port 12 extremely gas vent 13 direction, all the cylinder is including the first cylinder 14 and at least one second cylinder 15 that set gradually, and at least one be provided with on the second cylinder 15 tonifying qi mouth 11, according to actual need and the requirement selectivity of compressor 1 structural strength set up tonifying qi mouth 11 on second cylinder 15 and spout the enthalpy tonifying qi, guarantee the reliability of compressor 1 and heat pump system work.
Along the rotation direction of the rotor in the second cylinder 15, an air supplementing port 11, an air inlet and an air outlet are sequentially arranged on the second cylinder.
The air supplementing port 11 is provided with an opening and closing mechanism, in the same second cylinder, when the rotor sweeps across the air supplementing port 11, the opening and closing mechanism is switched to an opening state, and when the rotor sweeps across the air inlet, the opening and closing mechanism is switched to a closing state.
The air supplementing pressure of the air supplementing ports 11 on all the second air cylinders 15 is the same.
The compressor further comprises a shell, wherein an air supplementing channel is arranged in the shell, and all air supplementing ports of the second air cylinder are communicated with the air supplementing channel.
The compressor further includes a slide valve disposed between the inlet and the outlet.
The heat pump system further comprises an outdoor heat exchanger 5 and an indoor heat exchanger 6, the supercooling mechanism 2 is provided with a refrigerant pipeline and a supercooling pipeline, the first end of the refrigerant pipeline and the first end of the supercooling pipeline are communicated with the outdoor heat exchanger 5, the second end of the refrigerant pipeline is communicated with the indoor heat exchanger 6, the second end of the supercooling pipeline forms the air supply outlet, supercooling is carried out on the refrigerant in the refrigerant pipeline through the supercooling pipeline, and the heat exchange effect of the heat pump system is improved.
The heat pump system further comprises a first throttling mechanism 7, the first end of the first throttling mechanism 7 is communicated with the outdoor heat exchanger 5, the first end of the refrigerant pipeline and the first end of the supercooling pipeline are communicated with the second end of the first throttling mechanism 7, when enthalpy injection and air supplement are not needed to be performed on the compressor 1, the refrigerant of the air supplement mechanism directly flows back to an air suction port 12 of the compressor 1 by using the first throttling mechanism 7, and when enthalpy injection and air supplement are needed to be performed on the compressor 1, the first throttling mechanism 7 is closed, and the corresponding second throttling mechanism is opened to perform enthalpy injection and air supplement.
And a second throttling mechanism 8 is arranged between the second end of the first throttling mechanism 7 and the first end of the supercooling pipeline, and the second throttling mechanism 8 is utilized to perform secondary throttling on the refrigerant to be fed into the supercooling pipeline, so that the heat exchange efficiency of the refrigerant in the supercooling pipeline on the refrigerant in the refrigerant pipeline is ensured.
The second cylinder 15 is provided with an air inlet, a piston is arranged in the second cylinder 15, the piston sequentially sweeps the air supplementing port 11 and the air inlet, the piston is arranged in the second cylinder 15 to form an air suction cavity and an air exhaust cavity with constantly changing volumes, the air suction cavity firstly sucks air from the air supplementing port 11 in the working process of the piston, and after the pressure in the air suction cavity reaches a set pressure, the air suction cavity is communicated with the air inlet to further suck air, so that the enthalpy injection and air supplement of the second cylinder 15 are realized, when the air suction cavity is communicated with the air inlet, the air supplementing port 11 is in a closed state, a sealing mechanism can be arranged at the air supplementing port 11, and the sealing can also be realized by using the corresponding second control mechanism 4.
The heat pump system also comprises at least two indoor heat exchangers 6, and all the indoor heat exchangers 6 are arranged in series, so that the purpose of one-driving-more heat pump system is realized.
The number of the cylinders is three, all the cylinders include one first cylinder 14 and two second cylinders 15, and the second control mechanisms 4 are in one-to-one correspondence with the two second cylinders 15, so that each second cylinder 15 can be controlled by the corresponding second control mechanism 4.
The first control mechanism 3 is an electromagnetic valve; or the second control mechanism 4 is an electromagnetic valve; or the first control mechanism 3 and the second control mechanism 4 are both electromagnetic valves.
The first throttle mechanism 7 and the second throttle mechanism 8 are both electronic expansion valves.
A control method of the heat pump system includes:
the heat pump system has a normal working mode and an enthalpy injection working mode:
in a normal working mode, the first control mechanism 3 is switched to a connected state, all the second control mechanisms 4 are switched to a disconnected state, at the moment, low-pressure refrigerant enters from an air suction port 12 of the compressor 1 and sequentially passes through an air cylinder of the compressor 1 to form multi-stage compression, then is discharged from an air exhaust port 13 of the compressor 1 and is reversed by the four-way valve, when the heat pump system performs heating, the exhaust of the compressor 1 passing through the four-way valve sequentially passes through the indoor heat exchanger 6, the supercooling mechanism 2, the first throttling mechanism 7 and the outdoor heat exchanger 5 and then flows back to the air suction port 12 of the compressor 1 through the four-way valve to complete a heating cycle, and when the heat pump system performs refrigeration, the exhaust of the compressor 1 passing through the four-way valve sequentially passes through the outdoor heat exchanger 5, the first throttling mechanism 7 and the indoor heat exchanger 6 and then flows back to the air suction port 12 of the compressor 1 through the four-way valve to complete a refrigeration cycle, the refrigerant is divided into two parts when passing through the supercooling mechanism 2, one part of the refrigerant is subjected to heat exchange circulation through a refrigerant pipeline, and the other part of the refrigerant enters the supercooling pipeline after passing through the second throttling mechanism 8 and flows back to the air suction port 12 of the compressor 1 through the first control mechanism 3;
and in the enthalpy injection working mode, the first control mechanism 3 is switched to a disconnected state, and at least one second control mechanism 4 is switched to a connected state, which is different from the normal working mode in that the refrigerant is divided into two parts by the supercooling mechanism 2, one part of the refrigerant passes through the refrigerant pipeline to perform heat exchange circulation, the other part of the refrigerant passes through the second throttling mechanism 8 and then enters the supercooling pipeline, and the refrigerant enters the second cylinder 15 of the corresponding compressor 1 through the second control mechanism 4 in the connected state to perform enthalpy injection and gas supplementation, wherein the opening degree of the second throttling mechanism 8 is dynamically adjusted according to actual needs.
The number of the cylinders is three, all the cylinders include one of the first cylinder 14 and two of the second cylinders 15, the second control mechanism 4 corresponds to the two of the second cylinders 15 one to one, and the two of the second control mechanism 4 includes a second control mechanism a and a second control mechanism b, and the enthalpy injection working mode further includes:
in the primary enthalpy injection mode, the second control mechanism a is switched to a connected state, and the second control mechanism b is switched to a disconnected state;
in the second-stage enthalpy injection mode, the second control mechanism a and the second control mechanism b are both switched to a communicated state, and the refrigerant in the supercooling pipeline enters the corresponding second cylinder 15 through the second control mechanism a and the second control mechanism b respectively.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (11)
1. A heat pump system, characterized by: the method comprises the following steps:
the air compressor comprises a compressor (1), wherein at least two air cylinders are arranged in the compressor (1), all the air cylinders are sequentially communicated in series, at least one air cylinder is provided with an air supplementing port (11), and the compressor (1) is provided with an air suction port (12);
the supercooling mechanism (2), the supercooling mechanism (2) has an air supply outlet, the air suction port (12) is communicated with the air supply outlet through a first control mechanism (3), and all the air supply ports (11) are communicated with the air supply outlet through a second control mechanism (4) respectively.
2. The heat pump system of claim 1, wherein: still be provided with gas vent (13) on compressor (1), follow induction port (12) extremely gas vent (13) direction, all the cylinder is including first cylinder (14) and at least one second cylinder (15) that set gradually, and at least one be provided with on second cylinder (15) tonifying qi mouth (11).
3. The heat pump system of claim 1, wherein: the heat pump system further comprises an outdoor heat exchanger (5) and an indoor heat exchanger (6), the supercooling mechanism (2) is provided with a refrigerant pipeline and a supercooling pipeline, the first end of the refrigerant pipeline and the first end of the supercooling pipeline are communicated with the outdoor heat exchanger (5), the second end of the refrigerant pipeline is communicated with the indoor heat exchanger (6), and the second end of the supercooling pipeline forms the air supply outlet.
4. The heat pump system of claim 3, wherein: the heat pump system further comprises a first throttling mechanism (7), a first end of the first throttling mechanism (7) is communicated with the outdoor heat exchanger (5), and a first end of the refrigerant pipeline and a first end of the supercooling pipeline are both communicated with a second end of the first throttling mechanism (7).
5. The heat pump system of claim 4, wherein: and a second throttling mechanism (8) is arranged between the second end of the first throttling mechanism (7) and the first end of the supercooling pipeline.
6. The heat pump system of claim 2, wherein: an air inlet is formed in the second air cylinder (15), a piston is arranged in the second air cylinder (15), and the piston sequentially sweeps the air supplementing port (11) and the air inlet in the same second air cylinder (15).
7. The heat pump system of claim 1, wherein: the heat pump system also comprises at least two indoor heat exchangers (6), and all the indoor heat exchangers (6) are arranged in series.
8. The heat pump system of claim 2, wherein: the number of the cylinders is three, all the cylinders comprise one first cylinder (14) and two second cylinders (15), and the second control mechanisms (4) correspond to the two second cylinders (15) one by one.
9. The heat pump system of claim 1, wherein: the first control mechanism (3) is an electromagnetic valve; or the second control mechanism (4) is an electromagnetic valve; or the first control mechanism (3) and the second control mechanism (4) are both electromagnetic valves.
10. A control method of the heat pump system according to any one of claims 1 to 9, characterized in that: the method comprises the following steps:
the heat pump system has a normal working mode and an enthalpy injection working mode:
in a normal working mode, the first control mechanism (3) is switched to a connected state, and all the second control mechanisms (4) are switched to a disconnected state;
and in an enthalpy injection working mode, the first control mechanism (3) is switched to a disconnected state, and at least one second control mechanism (4) is switched to a connected state.
11. The control method according to claim 10, characterized in that: the number of the cylinders is three, all the cylinders comprise one first cylinder (14) and two second cylinders (15), the second control mechanisms (4) correspond to the two second cylinders (15) one by one, the two second control mechanisms (4) comprise second control mechanisms a and second control mechanisms b, and the enthalpy injection working mode further comprises:
in the primary enthalpy injection mode, the second control mechanism a is switched to a connected state, and the second control mechanism b is switched to a disconnected state;
and in the second-stage enthalpy injection mode, the second control mechanism a and the second control mechanism b are switched to a communicated state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110657002.8A CN113203218B (en) | 2021-06-11 | 2021-06-11 | Heat pump system and control method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110657002.8A CN113203218B (en) | 2021-06-11 | 2021-06-11 | Heat pump system and control method thereof |
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| CN113203218A true CN113203218A (en) | 2021-08-03 |
| CN113203218B CN113203218B (en) | 2024-07-16 |
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| WO2017193854A1 (en) * | 2016-05-10 | 2017-11-16 | 比亚迪股份有限公司 | Heat pump air-conditioning system and electric vehicle |
| CN110486967A (en) * | 2019-08-27 | 2019-11-22 | 珠海凌达压缩机有限公司 | A kind of air-conditioning system and its control method |
| CN110762017A (en) * | 2019-10-22 | 2020-02-07 | 珠海格力节能环保制冷技术研究中心有限公司 | Air inlet structure, air exhaust structure, compressor, control method and air conditioner |
| CN215002362U (en) * | 2021-06-11 | 2021-12-03 | 珠海格力电器股份有限公司 | Heat pump system |
-
2021
- 2021-06-11 CN CN202110657002.8A patent/CN113203218B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104613665A (en) * | 2015-02-02 | 2015-05-13 | 珠海格力电器股份有限公司 | Heat pump air conditioning system |
| CN105485767A (en) * | 2015-12-22 | 2016-04-13 | 珠海格力电器股份有限公司 | Multi-split air conditioning system and control method |
| WO2017193854A1 (en) * | 2016-05-10 | 2017-11-16 | 比亚迪股份有限公司 | Heat pump air-conditioning system and electric vehicle |
| CN110486967A (en) * | 2019-08-27 | 2019-11-22 | 珠海凌达压缩机有限公司 | A kind of air-conditioning system and its control method |
| CN110762017A (en) * | 2019-10-22 | 2020-02-07 | 珠海格力节能环保制冷技术研究中心有限公司 | Air inlet structure, air exhaust structure, compressor, control method and air conditioner |
| CN215002362U (en) * | 2021-06-11 | 2021-12-03 | 珠海格力电器股份有限公司 | Heat pump system |
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