CN107238236B - Air-supplying enthalpy-increasing air conditioning system and control method thereof - Google Patents
Air-supplying enthalpy-increasing air conditioning system and control method thereof Download PDFInfo
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- CN107238236B CN107238236B CN201710347130.6A CN201710347130A CN107238236B CN 107238236 B CN107238236 B CN 107238236B CN 201710347130 A CN201710347130 A CN 201710347130A CN 107238236 B CN107238236 B CN 107238236B
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- flow path
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- heat exchanger
- compressor
- refrigerant
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- 238000004378 air conditioning Methods 0.000 title claims abstract description 29
- 238000000034 method Methods 0.000 title claims abstract description 14
- 239000003507 refrigerant Substances 0.000 claims abstract description 39
- 238000005057 refrigeration Methods 0.000 claims description 21
- 239000000243 solution Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000008092 positive effect Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
- 238000010257 thawing Methods 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
- 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
- F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
- F25B47/006—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass for preventing frost
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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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- 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
- F25B2600/00—Control issues
- F25B2600/25—Control of valves
- F25B2600/2501—Bypass valves
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses an air-supplying enthalpy-increasing air conditioning system and a control method thereof. The air-supplying enthalpy-increasing air conditioning system comprises a compressor, an outdoor heat exchanger, a throttling device and an indoor heat exchanger which are connected together to form a refrigerant loop, wherein the compressor is provided with a refrigerant suction inlet and a refrigerant discharge outlet, the refrigerant suction inlet of the compressor is connected with a bypass pipe, the outdoor heat exchanger is provided with a first flow path and a second flow path which are used for allowing a refrigerant to flow through, the first flow path is connected between the refrigerant discharge outlet of the compressor and the throttling device, the inlet of the second flow path is connected with the refrigerant discharge outlet of the compressor, the outlet of the second flow path is respectively connected with the throttling device and the bypass pipe through a valve component, and the valve component is used for selectively enabling the second flow path to. The air-supplying enthalpy-increasing air conditioning system can continuously refrigerate in a low-temperature environment, so that the user experience is improved.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to an air-supplying and enthalpy-increasing air conditioning system and a control method thereof.
Background
At present, an air conditioner is a household appliance commonly used in daily life of people, and generally, the air conditioner performs refrigeration and temperature reduction under a hot condition of an external environment and performs heating and temperature rise under a cold condition of the external environment. And under special circumstances, the air conditioner is required to perform refrigeration operation in a low-temperature environment, at the moment, because the heat exchange effect is good, after the air conditioner operates for a period of time, a frosting phenomenon appears on the indoor side heat exchanger, and at the moment, the air conditioner stops the operation of the compressor in the outdoor unit to perform defrosting treatment. In the actual use process, the outdoor unit of the air conditioner is frequently started and stopped, so that the continuous operation of the air conditioner is influenced, and the user experience is low. The invention aims to solve the technical problem of how to design an air conditioning system capable of continuously performing low-temperature refrigeration to improve user experience.
Disclosure of Invention
The invention provides an air-supplying and enthalpy-increasing air conditioning system and a control method thereof, which are used for realizing the continuous refrigeration of the air-supplying and enthalpy-increasing air conditioning system in a low-temperature environment so as to improve the user experience.
In order to achieve the technical purpose, the invention adopts the following technical scheme:
the air-supplying enthalpy-increasing air conditioning system comprises a compressor, an outdoor heat exchanger, a throttling device and an indoor heat exchanger which are connected together to form a refrigerant loop, wherein the compressor is provided with a refrigerant suction inlet and a refrigerant discharge outlet, and is characterized in that the refrigerant suction inlet of the compressor is connected with a bypass pipe, the outdoor heat exchanger is provided with a first flow path and a second flow path which are used for allowing a refrigerant to flow through, the first flow path is connected between the refrigerant discharge outlet of the compressor and the throttling device, the inlet of the second flow path is connected with the refrigerant discharge outlet of the compressor, the outlet of the second flow path is respectively connected with the throttling device and the bypass pipe through a valve assembly, and the valve assembly is used for selectively enabling the second flow path to be cut off or enabling the second flow path to be communicated with the throttling device.
Further, the valve assembly is a three-position reversing valve.
Further, the valve assembly comprises a first electronic control valve and a second electronic control valve which are respectively connected with the outlet of the second flow path, the first electronic control valve is connected with the throttling device, and the second electronic control valve is connected with the bypass pipe.
Further, the first flow path is provided with a plurality of first sub-flow paths arranged in parallel, and the second flow path is provided with a plurality of second sub-flow paths arranged in parallel.
Further, the first sub flow paths and the second sub flow paths are alternately arranged at intervals.
The invention also provides a control method of the air-supplying enthalpy-increasing air conditioning system, which comprises the following steps: when the temperature of the external environment is detected to be lower than a first set temperature value or the temperature of the coil of the indoor heat exchanger is detected to be lower than a second set temperature value, the second flow path is cut off through the valve assembly or the second flow path is communicated with the bypass pipe through the valve assembly.
Further, the method also comprises the following steps: and controlling an outdoor fan on the outdoor side of the air-supplying enthalpy-increasing air-conditioning system to reduce the rotating speed.
Further, the method also comprises the following steps: and controlling an indoor fan at the indoor side of the air-supplementing enthalpy-increasing air-conditioning system to increase the rotating speed.
Compared with the prior art, the invention has the advantages and positive effects that: the valve component is connected to the second flow path of the outdoor heat exchanger and can control the on-off of the second flow path and select the second flow path to be connected with the throttling device or the bypass pipe, so that in the actual operation process, when refrigeration is carried out in a low-temperature environment, the valve component can be communicated with the second flow path and the bypass pipe, the refrigerant output from the second flow path flows back to the compressor through the bypass pipe, the unthrottled refrigerant output from the second flow path directly returns to the compressor, the return air temperature is improved, the effect of air supply and enthalpy increase is achieved, the refrigeration load of the system is balanced, the indoor heat exchanger does not frost, and continuous operation is achieved. Similarly, the second flow path can be cut off through the valve assembly according to the needs, so that the heat exchange area and the heat exchange quantity of the outdoor heat exchanger are reduced, the matching of the outdoor heat exchanger and the indoor heat exchanger can be realized in a low-temperature environment, the heat exchange quantity of the whole system is adjusted, the refrigeration load of the system is balanced, the frosting phenomenon does not occur in the indoor heat exchanger, and the user experience is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic diagram of a first embodiment of an air-supplying enthalpy-increasing air conditioning system according to the present invention;
FIG. 2 is a schematic diagram of an embodiment of an air-supplying enthalpy-increasing air conditioning system according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1-2, the air-conditioning system with vapor injection and enthalpy compensation in this embodiment includes a compressor 1, an outdoor heat exchanger 2, a throttling device 3, and an indoor heat exchanger 4 connected together to form a refrigerant loop, where the compressor 1 has a refrigerant suction port and a refrigerant discharge port, and a refrigerant suction port of the compressor 1 is connected with a bypass pipe (not labeled), the outdoor heat exchanger 2 is provided with a first flow path 21 and a second flow path 22 for flowing refrigerant, the first flow path 21 is connected between a refrigerant discharge port of the compressor 1 and the throttle device 3, an inlet of the second flow path 22 is connected with a refrigerant outlet of the compressor 1, an outlet of the second flow path 22 is respectively connected with the throttling device 3 and the bypass pipe through a valve component, the valve assembly is used to selectively block the second flow path 22 or communicate the second flow path 22 with the throttle device 3 or the bypass pipe.
Specifically, in the present embodiment, the first flow path 21 in the outdoor heat exchanger 2 of the air-supplementing enthalpy-increasing air-conditioning system is always in a passage state during the operation of the air-supplementing enthalpy-increasing air-conditioning system, and the second flow path 22 is controlled by the valve assembly to be in a communication state according to the requirement. Specifically, when refrigeration is performed under a normal working condition, the valve assembly controls the second flow path 22 to be communicated with the throttling device, and the refrigerant flows into the first flow path 21 and the second flow path 22 simultaneously, is finally throttled by the throttling device 3 and then flows into the indoor heat exchanger 4; when the air conditioner refrigerates in a low-temperature environment, the valve assembly can be controlled to cut off the second flow path 22 or enable the second flow path 22 to be communicated with the bypass pipe according to the operation state, specifically, after the valve assembly is communicated with the second flow path 22 and the bypass pipe, the refrigerant output by the second flow path 22 directly flows back to the compressor 1, the refrigerant flowing out of the second flow path 22 directly enters the compressor 1 without being processed by the throttling device 3, the heat of the refrigerant flowing out of the second flow path 22 is used for supplementing air and increasing enthalpy to the air conditioning system, the refrigeration efficiency can be effectively improved, meanwhile, the amount of the refrigerant flowing into the indoor heat exchanger 4 is reduced, the heat exchange amount of the system can be effectively adjusted, the refrigeration load of the system is balanced, the indoor heat exchanger does not frost, and continuous operation is realized; similarly, the second flow path 22 can be closed by the valve assembly, and the refrigerant cannot flow through the second flow path 22, so that the heat exchange area of the outdoor heat exchanger 2 can be reduced, the overall heat exchange amount of the system is reduced, and the frosting of the indoor heat exchanger 4 can be avoided. And the first electrically controlled valve 51 may be a block valve to block the second flow path 22.
The expression entity for the valve assembly can adopt various structural forms, such as: the valve component can adopt a three-position reversing valve which can realize the cut-off and the communication of the second flow path 22 with the throttling device 3 or with the bypass pipe; likewise, the valve assembly may be implemented using two electrically controlled valves, i.e. the valve assembly comprises a first electrically controlled valve 51 and a second electrically controlled valve 52, the first electrically controlled valve 51 being connected between the second flow path 22 and said throttle means 3, and the second electrically controlled valve 52 being connected between the second flow path 22 and the bypass line.
In addition, in order to fully utilize the heat exchange area of the outdoor heat exchanger 2, the first flow path 21 is provided with a plurality of first sub-flow paths arranged in parallel, the second flow path 22 is provided with a plurality of second sub-flow paths arranged in parallel, and preferably, the first sub-flow paths and the second sub-flow paths are alternately arranged at intervals. Specifically, the plurality of sub-flow paths can ensure that the refrigerant is uniformly distributed on the heat exchange surface of the outdoor heat exchanger 2, and the first sub-flow paths and the second sub-flow paths are alternately arranged at intervals, so that the first flow path 21 can fully utilize the heat exchange area of the outdoor heat exchanger 2 to exchange heat under the low-temperature refrigeration working condition, and the refrigeration requirement under the low-temperature refrigeration working condition is ensured.
The invention also provides a control method for the air-supplying enthalpy-increasing air conditioning system, which comprises the following steps: when the temperature of the external environment is detected to be lower than a first set temperature value or the temperature of the coil of the indoor heat exchanger is detected to be lower than a second set temperature value, the second flow path is cut off through the valve assembly or the second flow path is communicated with the bypass pipe through the valve assembly. Specifically, when refrigeration is performed in a low-temperature environment, if it is detected that the external environment temperature is lower than a first set temperature value or the temperature of a coil of the indoor heat exchanger is lower than a second set temperature value, it indicates that frosting is likely to occur on the indoor heat exchanger, and at this time, the valve assembly is controlled to close the second flow path or enable the second flow path to be communicated with the bypass pipe; when the outdoor environment temperature or the indoor coil temperature rises to a preset temperature point, the valve assembly enables the second flow path to be communicated with the throttling device, and the system recovers normal operation. Preferably, in the low-temperature refrigeration process, the outdoor fan at the outdoor side of the air-supplying and enthalpy-increasing air-conditioning system can be controlled to reduce the rotating speed, the indoor fan at the indoor side of the air-supplying and enthalpy-increasing air-conditioning system is controlled to increase the rotating speed, the indoor heat exchanger obtains larger wind power, the release of the cold energy of the indoor heat exchanger is further accelerated, the indoor heat exchanger is ensured not to be frosted, meanwhile, the outdoor heat exchanger obtains smaller wind power, the heat exchange quantity of the outdoor heat exchanger is weakened, the balance of the system refrigeration load is met to the maximum degree, the frosting phenomenon of the outdoor heat exchanger is ensured not to occur, and the continuous operation
Compared with the prior art, the invention has the advantages and positive effects that: the valve component is connected to the second flow path of the outdoor heat exchanger and can control the on-off of the second flow path and select the second flow path to be connected with the throttling device or the bypass pipe, so that in the actual operation process, when refrigeration is carried out in a low-temperature environment, the valve component can be communicated with the second flow path and the bypass pipe, the refrigerant output from the second flow path flows back to the compressor through the bypass pipe, the unthrottled refrigerant output from the second flow path directly returns to the compressor, the return air temperature is improved, the effect of air supply and enthalpy increase is achieved, the refrigeration load of the system is balanced, the indoor heat exchanger does not frost, and continuous operation is achieved. Similarly, the second flow path can be cut off through the valve assembly according to the needs, so that the heat exchange area and the heat exchange quantity of the outdoor heat exchanger are reduced, the matching of the outdoor heat exchanger and the indoor heat exchanger can be realized in a low-temperature environment, the heat exchange quantity of the whole system is adjusted, the refrigeration load of the system is balanced, the frosting phenomenon does not occur in the indoor heat exchanger, and the user experience is improved.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions.
Claims (4)
1. An air-supplying enthalpy-increasing air conditioning system comprises a compressor, an outdoor heat exchanger, a throttling device and an indoor heat exchanger which are connected together to form a refrigerant loop, wherein the compressor is provided with a refrigerant suction inlet and a refrigerant discharge outlet, the air conditioning system is characterized in that the refrigerant suction inlet of the compressor is connected with a bypass pipe, the outdoor heat exchanger is provided with a first flow path and a second flow path for refrigerant to flow through, the first flow path is connected between the refrigerant discharge outlet of the compressor and the throttling device, the inlet of the second flow path is connected with the refrigerant discharge outlet of the compressor, the outlet of the second flow path is respectively connected with the throttling device and the bypass pipe through a valve assembly, the valve assembly is used for selectively enabling the second flow path to be cut off or enabling the second flow path to be communicated with the throttling device or the bypass pipe, the first flow path is provided with a plurality of first sub, the second flow path is provided with a plurality of second sub-flow paths arranged in parallel, and the first sub-flow paths and the second sub-flow paths are alternately arranged at intervals; when the refrigeration is carried out in a low-temperature environment, when the temperature of the external environment is detected to be lower than a first set temperature value or the temperature of a coil of the indoor heat exchanger is detected to be lower than a second set value, the second flow path is cut off through the valve assembly, or the valve assembly enables the second flow path to be communicated with the bypass pipe.
2. An enthalpy-increasing air conditioning system according to claim 1, wherein the valve assembly is a three-position directional valve.
3. An enthalpy-increasing air conditioning system according to claim 1, wherein the valve assembly includes a first electrically controlled valve and a second electrically controlled valve respectively connected to the outlets of the second flow paths, the first electrically controlled valve being connected to the throttling device, and the second electrically controlled valve being connected to the bypass pipe.
4. A method of controlling an enthalpy-increasing air conditioning system according to any of claims 1 to 3, comprising: when refrigeration is carried out in a low-temperature environment, when the temperature of the external environment is detected to be lower than a first set temperature value or the temperature of a coil of the indoor heat exchanger is detected to be lower than a second set value, an outdoor fan on the outdoor side of the air-supplying enthalpy-increasing air-conditioning system is controlled to reduce the rotating speed; and/or controlling an indoor fan on the indoor side of the air-supplying enthalpy-increasing air-conditioning system to increase the rotating speed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710347130.6A CN107238236B (en) | 2017-05-17 | 2017-05-17 | Air-supplying enthalpy-increasing air conditioning system and control method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710347130.6A CN107238236B (en) | 2017-05-17 | 2017-05-17 | Air-supplying enthalpy-increasing air conditioning system and control method thereof |
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| Publication Number | Publication Date |
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| CN107238236A CN107238236A (en) | 2017-10-10 |
| CN107238236B true CN107238236B (en) | 2020-08-04 |
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| CN201710347130.6A Active CN107238236B (en) | 2017-05-17 | 2017-05-17 | Air-supplying enthalpy-increasing air conditioning system and control method thereof |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110736207B (en) * | 2019-09-26 | 2022-04-15 | 青岛海尔空调器有限总公司 | Control method and control device for defrosting of air conditioner and air conditioner |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014149141A (en) * | 2013-02-04 | 2014-08-21 | Daikin Ind Ltd | Freezer |
| CN204329388U (en) * | 2014-12-02 | 2015-05-13 | 广东美的制冷设备有限公司 | Air-conditioner |
| CN205373132U (en) * | 2015-12-29 | 2016-07-06 | Tcl空调器(中山)有限公司 | Indoor temperature regulation and control system and air conditioner |
| CN106595105A (en) * | 2015-10-19 | 2017-04-26 | Lg电子株式会社 | Air conditioner |
| CN106940071A (en) * | 2017-03-24 | 2017-07-11 | 青岛海尔空调器有限总公司 | Air-conditioning device and its control method |
-
2017
- 2017-05-17 CN CN201710347130.6A patent/CN107238236B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014149141A (en) * | 2013-02-04 | 2014-08-21 | Daikin Ind Ltd | Freezer |
| CN204329388U (en) * | 2014-12-02 | 2015-05-13 | 广东美的制冷设备有限公司 | Air-conditioner |
| CN106595105A (en) * | 2015-10-19 | 2017-04-26 | Lg电子株式会社 | Air conditioner |
| CN205373132U (en) * | 2015-12-29 | 2016-07-06 | Tcl空调器(中山)有限公司 | Indoor temperature regulation and control system and air conditioner |
| CN106940071A (en) * | 2017-03-24 | 2017-07-11 | 青岛海尔空调器有限总公司 | Air-conditioning device and its control method |
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| CN107238236A (en) | 2017-10-10 |
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Effective date of registration: 20200914 Address after: 266101 Haier Industrial Park, Haier Road, Laoshan District, Shandong, Qingdao, China Co-patentee after: Qingdao Haier Parts Co.,Ltd. Patentee after: QINGDAO HAIER AIR CONDITIONER GENERAL Corp.,Ltd. Address before: 266101 Haier Industrial Park, Haier Road, Laoshan District, Shandong, Qingdao, China Patentee before: QINGDAO HAIER AIR CONDITIONER GENERAL Corp.,Ltd. |
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Effective date of registration: 20201102 Address after: 266101 Haier Industrial Park, Haier Road, Laoshan District, Shandong, Qingdao, China Patentee after: QINGDAO HAIER AIR CONDITIONER GENERAL Corp.,Ltd. Patentee after: Qingdao Haier Parts Co.,Ltd. Patentee after: Haier Smart Home Co., Ltd. Address before: 266101 Haier Industrial Park, Haier Road, Laoshan District, Shandong, Qingdao, China Patentee before: QINGDAO HAIER AIR CONDITIONER GENERAL Corp.,Ltd. Patentee before: Qingdao Haier Parts Co.,Ltd. |
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