CN110836469B - Defrosting control method for air conditioner - Google Patents
Defrosting control method for air conditioner Download PDFInfo
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- CN110836469B CN110836469B CN201810940318.6A CN201810940318A CN110836469B CN 110836469 B CN110836469 B CN 110836469B CN 201810940318 A CN201810940318 A CN 201810940318A CN 110836469 B CN110836469 B CN 110836469B
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- 238000010257 thawing Methods 0.000 title claims abstract description 69
- 238000000034 method Methods 0.000 title claims abstract description 53
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 3
- 239000003507 refrigerant Substances 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/41—Defrosting; Preventing freezing
- F24F11/42—Defrosting; Preventing freezing of outdoor units
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/65—Electronic processing for selecting an operating mode
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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
- F25B47/02—Defrosting cycles
- F25B47/022—Defrosting cycles hot gas defrosting
- F25B47/025—Defrosting cycles hot gas defrosting by reversing the cycle
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2140/00—Control inputs relating to system states
- F24F2140/20—Heat-exchange fluid temperature
-
- 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
- F25B2347/00—Details for preventing or removing deposits or corrosion
- F25B2347/02—Details of defrosting cycles
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Human Computer Interaction (AREA)
- Thermal Sciences (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention belongs to the technical field of air conditioners, and particularly relates to a defrosting control method of an air conditioner. In order to improve the defrosting efficiency of the air conditioner, the defrosting control method of the air conditioner provided by the invention aims at the air conditioner with double fans arranged on an outdoor unit, and the method comprises the following steps: after the air conditioner enters a defrosting mode, controlling the upper fan and the lower fan to stop rotating; after the first set time, respectively detecting the temperature t of the upper part of the outer coil pipeOn the upper partTemperature t of the middle part of the outer coilInAnd the temperature t of the lower part of the outer coilLower part(ii) a According to tOn the upper part、tInAnd tLower partSelectively controls the upper fan and the lower fan to reverse/stop rotation. The invention is based on tOn the upper part、tInAnd tLower partAt least one of the upper fan and the lower fan is selectively controlled to rotate reversely, so that the frost layer is accurately blown down, and the defrosting efficiency of the air conditioner is greatly improved.
Description
Technical Field
The invention belongs to the technical field of air conditioners, and particularly relates to a defrosting control method of an air conditioner.
Background
The air conditioner as a device capable of adjusting the indoor environment temperature has the working principle that: the indoor environment temperature is lowered or raised by the refrigerant switching between the circulation lines through the high pressure/low pressure/gas/liquid state, namely, the air conditioner is in the cooling or heating working condition from the perspective of the indoor unit. When the air conditioner heats the operation, if outdoor coil pipe temperature under certain humidity condition crosses lowly can lead to the condition of frosting, and outdoor coil pipe frosting can lead to outdoor heat exchanger's heat exchange efficiency to reduce, influences the heating effect of air conditioner, reduces indoor environment's travelling comfort, influences user experience. Therefore, in the situation that the air conditioner is in the heating working condition, the outdoor coil of the air conditioner needs to be defrosted timely and effectively.
In the prior art, an air conditioner basically adopts reverse cycle defrosting (i.e., the outdoor unit is defrosted by switching the direction of a four-way valve) or bypass defrosting (the outdoor unit is defrosted by opening a bypass branch), and whether to quit defrosting is judged by monitoring defrosting time or certain parameters such as the temperature of an external coil pipe. And lack the auxiliary means in the defrosting process and accelerate defrosting efficiency, lead to current defrosting process singleness, efficiency is lower.
Therefore, there is a need in the art for a new defrost control method to improve the defrost efficiency of an air conditioner.
Disclosure of Invention
Based on the above problems in the background art, in order to improve the defrosting efficiency of the air conditioner, the invention provides a defrosting control method of the air conditioner, wherein an outdoor unit of the air conditioner comprises an upper fan and a lower fan, and the method comprises the following steps: after the air conditioner enters a defrosting mode, controlling the upper fan and the lower fan to stop rotating; after the first set time, respectively detecting the temperature t of the upper part of the outer coil pipeOn the upper partTemperature of middle part of outer coilDegree tInAnd the temperature t of the lower part of the outer coilLower part(ii) a According to tOn the upper part、tInAnd tLower partSelectively controls the upper fan and the lower fan to reverse/stop rotation.
In a preferred embodiment of the above-described air conditioner defrost control method, "according to tOn the upper part、tInAnd tLower partThe step of selectively controlling the upper fan and the lower fan to reverse/stop rotating "includes: after a first set time, if tOn the upper partIf the temperature is more than or equal to the dew point temperature, only controlling the upper fan to reversely rotate for a second set time; after a first set time, if tOn the upper partNot less than dew point temperature tInNot less than dew point temperature tLower partIf the temperature is less than the dew point temperature, controlling the upper fan to reversely rotate for a second set time, and controlling the lower fan to reversely rotate for a third set time; after a first set time, if tOn the upper partNot less than dew point temperature tInNot less than dew point temperature tLower partAnd if the temperature is more than or equal to the dew point temperature, only controlling the lower fan to reversely rotate for a second set time.
In a preferred embodiment of the above defrosting control method of an air conditioner, the first set time is any time between 2 and 4 minutes; and/or the second set time is any time between 14 and 16 seconds; and/or the third set time is any time between 9 and 11 seconds.
In a preferred embodiment of the above defrosting control method of an air conditioner, the first set time is 3 minutes; and/or the second set time is 15 seconds; and/or the third set time is 10 seconds.
In a preferred embodiment of the above-mentioned defrosting control method for an air conditioner, before the step of controlling the upper fan and the lower fan to stop rotating after the air conditioner enters the defrosting mode, the method further includes: detecting the temperature of an external coil of the air conditioner; when the temperature of the external coil is lower than the dew point temperature, detecting the continuous operation time of the air conditioner in the state; and if the continuous operation time is higher than a first preset time, enabling the air conditioner to enter a defrosting mode.
In a preferred embodiment of the above air conditioner defrosting control method, the first preset time is any time between 35 and 45 minutes.
In a preferred embodiment of the above-described defrosting control method of an air conditioner, the first preset time is 40 minutes.
In a preferred embodiment of the above-described air conditioner defrost control method, the method further includes: detecting the temperature of an external coil of the air conditioner; when the temperature of the external coil is higher than the set temperature, detecting the continuous operation time of the air conditioner in the state; and if the continuous operation time is higher than a second preset time, enabling the air conditioner to exit the defrosting mode.
In a preferred embodiment of the above air conditioner defrosting control method, the second preset time is any time between 15 and 25 seconds.
In a preferred embodiment of the above air conditioner defrosting control method, the second preset time is 20 seconds.
The defrosting control method of the air conditioner is mainly characterized in that after the air conditioner enters a defrosting mode, the defrosting control method is carried out according to tOn the upper part、tInAnd tLower partAt least one of the upper fan and the lower fan is selectively controlled to rotate reversely to blow off the melted frost layer, and the conditions of different temperature changes of the outer coil pipe in the defrosting process are considered, so that the frost layer is blown off accurately, and the defrosting efficiency of the air conditioner is greatly improved. Compared with the traditional defrosting mode, namely the condition that the frost layer is required to be gradually separated from the outdoor unit or completely melted into water, the defrosting method can more quickly finish defrosting operation and effectively reduce the influence of the defrosting process on the indoor temperature.
Drawings
FIG. 1 is a main flow chart of the defrosting control method of the air conditioner of the present invention;
fig. 2 is a flowchart of a defrosting control method of an air conditioner according to an embodiment of the present invention.
Detailed Description
In order to make the embodiments, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the embodiments are some, but not all embodiments of the present invention. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and are not intended to limit the scope of the present invention.
The defrosting control method of the invention mainly aims at the air conditioner with double fans arranged on an outdoor unit. Specifically, the present invention is directed to an air conditioner, in which an outdoor unit includes an upper fan and a lower fan, and the upper fan and the lower fan may independently rotate in forward or reverse directions.
Referring to fig. 1, fig. 1 is a main flowchart of a defrosting control method of an air conditioner according to the present invention. As shown in fig. 1, the defrosting control method of an air conditioner of the present invention includes: s110, controlling the upper fan and the lower fan to stop rotating after the air conditioner enters a defrosting mode; s120, respectively detecting the temperature t of the upper part of the outer coil pipe after the first set timeOn the upper partTemperature t of the middle part of the outer coilInAnd the temperature t of the lower part of the outer coilLower part(ii) a S130, according to tOn the upper part、tInAnd tLower partSelectively controls the upper fan and the lower fan to rotate reversely/stop. As an example, the first set time may be 3 minutes, or any time between 2 and 4 minutes may be selected, and those skilled in the art may select other reasonable first set times according to the actual application scenario. Temperature t about three parts of the outer coilOn the upper part、tInAnd tLower part: as can be understood by those skilled in the art, the temperature of the outer coil pipe is different from top to bottom due to the fact that the refrigerant does not uniformly enter the outer coil pipe, and therefore the temperature of the outer coil pipe at different positions can be detected by arranging the temperature sensors at the upper, middle and lower positions of the outer coil pipe, and the condition that the temperature of the outer coil pipe is different in the defrosting process is considered.
As described above, the present invention is based on t during defrostingOn the upper part、tInAnd tLower partAt least one of the upper fan and the lower fan is selectively controlled to reverse to blow off the melted frost layer, thereby improving the defrosting efficiency. It will be understood by those skilled in the art that the defrosting of the air conditioner is performed due to heat and coldMedium flows in from the upper part of the outdoor heat exchanger, and frost layer is also melted down from the upper part of the outdoor unit, so the medium is according to tOn the upper part、tInAnd tLower partThe upper fan and/or the lower fan are/is selectively controlled to rotate reversely, so that the frost layer can be blown down accurately, and the defrosting efficiency of the air conditioner is greatly improved. Compared with the traditional defrosting mode, namely the condition that the frost layer is required to be gradually separated from the outdoor unit or completely melted into water, the defrosting method can more quickly finish defrosting operation and effectively reduce the influence of the defrosting process on the indoor temperature.
For example, after 3 minutes, if tOn the upper partIf the temperature is more than or equal to the dew point temperature, only controlling the upper fan to reversely rotate for a second set time; after another 3 minutes, if tOn the upper partNot less than dew point temperature tInNot less than dew point temperature tLower partIf the temperature is less than the dew point temperature, controlling the upper fan to rotate reversely for a second set time, and controlling the lower fan to rotate reversely for a third set time; after another 3 minutes, if tOn the upper partNot less than dew point temperature tInNot less than dew point temperature tLower partAnd if the temperature is more than or equal to the dew point temperature, only controlling the lower fan to reversely rotate for a second set time. As an example, the second set time may be 15 seconds, or any time between 14 and 16 seconds; the third set time may be 10 seconds or any time between 9 and 11 seconds.
Referring to fig. 2, fig. 2 is a flowchart of a defrosting control method of an air conditioner according to an embodiment of the present invention. As shown in fig. 2, in this embodiment, the specific steps of the present invention are as follows: s210, detecting the temperature Toil of an external coil of the air conditioner; when Toil is less than the dew point temperature, the operation proceeds to step S220, and the continuous operation time of the air conditioner in the state is detected; if the duration time is higher than the first preset time, for example, the duration time is higher than 40 minutes (the first preset time may also be any time between 35 and 45 minutes), the method proceeds to step S230, and the air conditioner enters the defrost mode. After step S230, the above steps S110 to S130 are performed. Wherein the dew point temperature refers to the temperature of the air when the air is cooled to saturation under the condition that the water vapor content and the air pressure are not changed.
The defrosting control method of the air conditioner further comprises the step of exiting the defrosting mode. For example, after the air conditioner enters the defrosting mode, the temperature of the external coil of the air conditioner is detected, when the temperature of the external coil is higher than a set temperature (which can be reasonably set by a person skilled in the art according to the practical application scenario of the air conditioner), the continuous operation time of the air conditioner in this state is detected, when the continuous operation time is higher than a second preset time, for example, the continuous operation time is higher than 20 seconds (or any time between 15 and 25 seconds), it can be judged that the frost layer of the external coil has been removed, and at this time, the air conditioner is exited from the defrosting mode.
In summary, the defrosting control method for the air conditioner of the present invention is mainly implemented according to t after the air conditioner enters the defrosting modeOn the upper part、tInAnd tLower partAt least one of the upper fan and the lower fan is selectively controlled to rotate reversely to blow off the melted frost layer, and the conditions of different temperature changes of the outer coil pipe in the defrosting process are considered, so that the frost layer is blown off accurately, and the defrosting efficiency of the air conditioner is greatly improved. Compared with the traditional defrosting mode, namely the condition that the frost layer is required to be gradually separated from the outdoor unit or completely melted into water, the defrosting method can more quickly finish defrosting operation and effectively reduce the influence of the defrosting process on the indoor temperature.
So far, the technical solutions of the present invention have been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the invention, and the technical scheme after the changes or substitutions can fall into the protection scope of the invention.
Claims (9)
1. An air conditioner defrosting control method, an outdoor unit of the air conditioner comprises an upper fan and a lower fan, and the method is characterized by comprising the following steps:
after the air conditioner enters a defrosting mode, controlling the upper fan and the lower fan to stop rotating;
after the first set time, the upper parts of the outer coil pipes are respectively detectedTemperature tOn the upper partTemperature t of the middle part of the outer coilInAnd the temperature t of the lower part of the outer coilLower part；
According to tOn the upper part、tInAnd tLower partSelectively controls the upper fan and the lower fan to rotate reversely/stop;
"according to tOn the upper part、tInAnd tLower partThe step of selectively controlling the upper fan and the lower fan to reverse/stop rotating "includes:
after a first set time, if tOn the upper partIf the temperature is more than or equal to the dew point temperature, only controlling the upper fan to reversely rotate for a second set time;
after a first set time, if tOn the upper partNot less than dew point temperature tInNot less than dew point temperature tLower partIf the temperature is less than the dew point temperature, controlling the upper fan to reversely rotate for a second set time, and controlling the lower fan to reversely rotate for a third set time;
after a first set time, if tOn the upper partNot less than dew point temperature tInNot less than dew point temperature tLower partAnd if the temperature is more than or equal to the dew point temperature, only controlling the lower fan to reversely rotate for a second set time.
2. The air conditioner defrost control method of claim 1, wherein the first set time is any time between 2-4 minutes; and/or
The second set time is any time between 14 and 16 seconds; and/or
The third set time is any time between 9 and 11 seconds.
3. The air conditioner defrost control method of claim 2, wherein the first set time is 3 minutes; and/or
The second set time is 15 seconds; and/or
The third setting time is 10 seconds.
4. The air conditioner defrost control method of claim 3, wherein before the step of controlling the up fan and the down fan to stop rotating after the air conditioner enters the defrost mode, the method further comprises:
detecting the temperature of an external coil of the air conditioner;
when the temperature of the external coil is lower than the dew point temperature, detecting the continuous operation time of the air conditioner in the state;
and if the continuous operation time is higher than a first preset time, enabling the air conditioner to enter a defrosting mode.
5. The air conditioner defrost control method of claim 4, wherein the first preset time is any time between 35-45 minutes.
6. The air conditioner defrost control method of claim 5, wherein the first preset time is 40 minutes.
7. The air conditioner defrost control method of any one of claims 1-6, further comprising:
detecting the temperature of an external coil of the air conditioner;
when the temperature of the external coil is higher than the set temperature, detecting the continuous operation time of the air conditioner in the state;
and if the continuous operation time is higher than a second preset time, enabling the air conditioner to exit the defrosting mode.
8. The air conditioner defrost control method of claim 7, wherein the second preset time is any time between 15-25 seconds.
9. The air conditioner defrost control method of claim 8, wherein the second preset time is 20 seconds.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810940318.6A CN110836469B (en) | 2018-08-17 | 2018-08-17 | Defrosting control method for air conditioner |
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| CN201810940318.6A CN110836469B (en) | 2018-08-17 | 2018-08-17 | Defrosting control method for air conditioner |
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| CN117053296A (en) * | 2022-05-05 | 2023-11-14 | 青岛海尔空调电子有限公司 | Air conditioner outdoor unit, air conditioner and control method of air conditioner |
| CN114992799B (en) * | 2022-05-05 | 2024-06-07 | 青岛海尔空调电子有限公司 | Air conditioner outdoor unit and control method of air conditioner |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6441782A (en) * | 1987-08-07 | 1989-02-14 | Toshiba Corp | Heat pump type air conditioner |
| CN104833060A (en) * | 2015-05-22 | 2015-08-12 | 广东美的暖通设备有限公司 | Defrosting control method and device for air conditioner |
| CN106871338A (en) * | 2017-01-19 | 2017-06-20 | 青岛海尔空调器有限总公司 | A kind of air-conditioner defrosting control method |
| CN107328026A (en) * | 2017-07-31 | 2017-11-07 | 珠海格力电器股份有限公司 | Fan control method and device and air conditioner outdoor unit |
-
2018
- 2018-08-17 CN CN201810940318.6A patent/CN110836469B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6441782A (en) * | 1987-08-07 | 1989-02-14 | Toshiba Corp | Heat pump type air conditioner |
| CN104833060A (en) * | 2015-05-22 | 2015-08-12 | 广东美的暖通设备有限公司 | Defrosting control method and device for air conditioner |
| CN106871338A (en) * | 2017-01-19 | 2017-06-20 | 青岛海尔空调器有限总公司 | A kind of air-conditioner defrosting control method |
| CN107328026A (en) * | 2017-07-31 | 2017-11-07 | 珠海格力电器股份有限公司 | Fan control method and device and air conditioner outdoor unit |
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Inventor after: Xu Wenming Inventor after: Luo Rongbang Inventor after: Wang Fei Inventor after: Wu Jian Inventor before: Xu Wenming Inventor before: Luo Rongbang |
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Effective date of registration: 20210705 Address after: No.188, 22nd Street, Zhengzhou Economic and Technological Development Zone, Henan 450007 Applicant after: ZHENGZHOU HAIER AIR CONDITIONER Co.,Ltd. Applicant after: QINGDAO HAIER AIR CONDITIONER GENERAL Corp.,Ltd. Applicant after: Haier Smart Home Co., Ltd. Address before: 266101 Haier Industrial Park, 1 Haier Road, Laoshan District, Shandong, Qingdao Applicant before: QINGDAO HAIER AIR CONDITIONER GENERAL Corp.,Ltd. |
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