CN110836435B - Control method for inhibiting frosting of air conditioner - Google Patents
Control method for inhibiting frosting of air conditioner Download PDFInfo
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- CN110836435B CN110836435B CN201810939432.7A CN201810939432A CN110836435B CN 110836435 B CN110836435 B CN 110836435B CN 201810939432 A CN201810939432 A CN 201810939432A CN 110836435 B CN110836435 B CN 110836435B
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- 238000000034 method Methods 0.000 title claims abstract description 30
- 230000002401 inhibitory effect Effects 0.000 title abstract description 5
- 230000001629 suppression Effects 0.000 claims description 17
- 230000005764 inhibitory process Effects 0.000 abstract description 3
- 238000010438 heat treatment Methods 0.000 description 7
- 238000010257 thawing Methods 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 3
- 230000003111 delayed effect Effects 0.000 description 3
- 238000006467 substitution reaction Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
-
- 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
-
- 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)
- Signal Processing (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Thermal Sciences (AREA)
- Human Computer Interaction (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention belongs to the technical field of air conditioners, and particularly relates to a control method for inhibiting frosting of an air conditioner. In order to effectively inhibit the frosting speed of the air conditioner, the invention provides a frosting inhibition control method of the air conditioner, which comprises the following steps: detecting the current value of an outdoor fan of the air conditioner in real time; if the detected real-time current value is equal to the standard current value, detecting the current value I of the outdoor fan of the air conditioner once every first preset timen(ii) a If In－In‑1If the current value is more than or equal to the set current value, controlling the rotating speed of the outdoor fan to be a second rotating speed; the standard current value is the current value of the outdoor fan measured in the state that the outdoor unit is not frosted; the second rotating speed is equal to the first rotating speed, and is 50 revolutions; i isn‑1Is InThe last detected current value, n, is a positive integer greater than 1, wherein the first rotating speed is the rotating speed of the outdoor fan at the highest gear. The invention adaptively adjusts the rotating speed of the outdoor fan according to the current of the outdoor fan, thereby effectively slowing down the frosting speed of the air conditioner.
Description
Technical Field
The invention belongs to the technical field of air conditioners, and particularly relates to a control method for inhibiting frosting 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, the defrosting operation is usually performed after the air conditioner is frosted, so as to ensure the heating efficiency of the air conditioner. For example, in the process of heating by the air conditioner, whether the air conditioner frosts is judged by using the running time and the temperature of the outdoor coil, and the air conditioner enters a defrosting mode after the air conditioner is in a frosting state. As long as defrosting inevitably affects the indoor temperature, how to effectively suppress frosting becomes an urgent problem to be solved in the field.
The present invention has been made in view of the above circumstances.
Disclosure of Invention
Based on the above problems in the background art, in order to effectively suppress the frosting speed of the air conditioner, the present invention provides a frosting suppression control method for the air conditioner, which comprises the following steps: detecting the current value of an outdoor fan of the air conditioner in real time; if the detected real-time current value is equal to the standard current value, detecting the current value In of the outdoor fan of the air conditioner once every first preset time; if the In-1 is larger than or equal to the set current value, controlling the rotating speed of the outdoor fan to be a second rotating speed; the standard current value is the current value of the outdoor fan measured in the state that the outdoor unit is not frosted; the second rotating speed is equal to the first rotating speed, and is 50 revolutions; in-1 is a current value detected last time by In, n is a positive integer greater than 1, wherein the first rotating speed is the rotating speed of the outdoor fan at the highest gear.
In a preferred embodiment of the above-described air conditioner frosting suppression control method, the first preset time is 1 minute, and/or the set current value is 0.05A.
In a preferred embodiment of the above-mentioned frost formation suppression control method for an air conditioner, In the step of "detecting the current value In of the outdoor fan of the air conditioner every first preset time if the detected real-time current value is equal to the standard current value", the rotation speed of the outdoor fan is controlled to the first rotation speed if the detected current value is equal to the standard current value.
In a preferred embodiment of the above air conditioner frost suppression control method, the method further includes: detecting the temperature of the outer coil pipe under the condition that the outdoor fan is at a second rotating speed; and selectively controlling the rotating speed of the outdoor fan according to the temperature of the outer coil.
In a preferred embodiment of the above air conditioner frost suppression control method, the step of "selectively controlling the rotation speed of the outdoor fan according to the temperature of the external coil" includes: if the temperature of the external coil pipe minus the dew point temperature is less than or equal to a set value, controlling the rotating speed of the outdoor fan to be a third rotating speed; wherein, the third rotational speed is the first rotational speed-200 revolutions.
In a preferred embodiment of the above air conditioner frost suppression control method, the step of "selectively controlling the rotation speed of the outdoor fan according to the temperature of the external coil" further includes: and under the condition that the temperature of the external coil minus the dew point temperature is less than or equal to a set value, controlling the outdoor fan to reduce the preset revolution at intervals of a second preset time.
In a preferred embodiment of the above-described air conditioner frost suppression control method, the set value is an arbitrary value within a range [ -4, -2 ].
In a preferred embodiment of the above air conditioner frost suppression control method, the set value is-3.
In a preferred embodiment of the above air conditioner frosting inhibition control method, the second preset time is any time between 55 seconds and 65 seconds; and/or the preset number of revolutions is any number of revolutions between 8 and 12 revolutions.
In a preferred embodiment of the above air conditioner frost formation suppression control method, the second preset time is 60 seconds; and/or the preset number of revolutions is 10 revolutions.
In the technical scheme of the invention, the current value of the outdoor fan is mainly utilized to control the rotating speed of the outdoor fan, and the frosting speed of the air conditioner is delayed as much as possible on the premise of ensuring the heating operation efficiency of the air conditioner, so that the defrosting times are reduced, and the influence on the indoor temperature is reduced. Particularly, the frosting possibility and the frosting speed of the outdoor unit can be more accurately judged through the increasing speed of the current value of the outdoor fan, so that the rotating speed of the outdoor fan is adaptively adjusted, and the frosting speed of the air conditioner is effectively reduced. Furthermore, the invention also controls the rotating speed of the outdoor fan in an auxiliary way by combining the temperature of the external coil pipe, thereby realizing the purpose of accurately controlling the rotating speed of the outdoor fan to delay the frosting of the outdoor unit to the maximum extent.
Drawings
FIG. 1 is a main flow chart of a control method for suppressing frosting of an air conditioner according to the present invention;
fig. 2 is a flow chart of controlling the rotational speed of the outdoor fan according to the 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.
Referring to fig. 1, fig. 1 is a main flowchart of a frost formation suppression control method of an air conditioner according to the present invention. As shown in fig. 1, the air conditioner frosting inhibition control method of the present invention comprises the following steps: s110, detecting the current value of the outdoor fan of the air conditioner in real time; s120, if the detected real-time current value is equal to the standard current value, detecting the current value I of the outdoor fan of the air conditioner once every first preset timen(ii) a S130, if In－In-1And controlling the rotating speed of the outdoor fan to be the second rotating speed if the current value is more than or equal to the set current value. The standard current value is the current value of the outdoor fan measured in the state that the outdoor unit is not frosted; the second rotating speed is equal to the first rotating speed, and is 50 revolutions; the first rotating speed is the rotating speed of the outdoor fan at the highest gear; i isn-1Is InThe last detected current value, n, is a positive integer greater than 1.
As can be understood by those skilled in the art, the rotation speed of the outdoor fan affects the heat exchange, i.e., the heat exchange efficiency, during the operation of the air conditioner, and the heat exchange efficiency affects the frosting condition of the outdoor unit; and because the current of the outdoor fan can reflect the tendency of the frosting condition of the outdoor unit, the function of inhibiting frosting can be achieved by controlling the rotating speed of the outdoor fan through the current value of the outdoor fan. Specifically, in step S130, the first preset time may be 1 minute, and the set current value may be 0.05A. That is, when the current value of the outdoor fan is increased by more than 0.05A per minute, it indicates that the outdoor unit is frosted, and the frosting speed is slow, and at this time, the rotation speed of the outdoor fan is controlled to be the second rotation speed, so that the frosting speed is further delayed.
As a specific example, referring to fig. 2, fig. 2 is a control flowchart of the rotation speed of the outdoor fan according to the embodiment of the present invention. As shown in fig. 2, after the current value of the outdoor fan of the air conditioner is detected, step S210 is first performed to compare the current value I of the outdoor fan with the standard current value Ie. According to the experimental test results, the current of the outdoor fan tends to increase along with the increase of the frosting thickness of the outdoor unit. If I is equal to Ie, it indicates that the outdoor unit is in an unfrozen state, and then the process proceeds to step S220, where the wind speed of the outdoor fan is controlled to a first rotational speed, i.e., a high-grade wind speed, so as to improve the heat exchange efficiency.
Meanwhile, if I is equal to Ie, the process proceeds to step S230, where the current value I of the outdoor air conditioner fan is detected every 1 minuten(ii) a If In－In-1And if the rotating speed is more than or equal to 0.05A, the step S240 is carried out, and the rotating speed of the outdoor fan is controlled to be the second rotating speed.
After step S240, in a case that the rotation speed of the outdoor fan is at the second rotation speed, the process proceeds to step S250, and the temperature Toil of the external coil is detected. Then, step S260, comparing the temperature Toil of the external coil with the dew point Te (which is 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); and if the Toil-Te is less than or equal to the set value, executing the step S270 and controlling the rotating speed of the outdoor fan to be a third rotating speed. The set value may be-3, or may be any value within the range [ -4, -2], and the third rotation speed is the first rotation speed-200 revolutions. As will be understood by those skilled in the art, since the temperature of the external coil is much lower than the dew point temperature, which indicates that the frosting speed of the outdoor unit is fast, the fan speed needs to be reduced to delay the frosting speed of the outdoor unit.
Further, after step S270, in the case that Toil-Te is less than or equal to-3, step S280 is executed to control the outdoor fan to reduce the preset number of revolutions every second preset time. Wherein the second preset time can be 60 seconds, or any time between 55 and 65 seconds, and the preset revolution number can be 10 revolutions, or any revolution number between 8 and 12 revolutions. It will be understood by those skilled in the art that in the case that the outdoor unit frosting speed is fast, the frosting degree of the outdoor unit will gradually increase with time, so that the frosting speed of the outdoor unit can be delayed by gradually reducing the rotation speed of the outdoor fan, for example, controlling the outdoor fan to decrease by 10 revolutions per minute.
In summary, the present invention mainly uses the current value of the outdoor fan to control the rotation speed of the outdoor fan, and delays the frosting speed of the air conditioner as much as possible on the premise of ensuring the heating operation efficiency of the air conditioner, thereby reducing the number of times of defrosting and reducing the influence on the indoor temperature. Particularly, the frosting possibility and the frosting speed of the outdoor unit can be more accurately judged through the increasing speed of the current value of the outdoor fan, so that the rotating speed of the outdoor fan is adaptively adjusted, and the frosting speed of the air conditioner is effectively reduced. Furthermore, the invention also controls the rotating speed of the outdoor fan in an auxiliary way by combining the temperature of the external coil pipe, thereby realizing the purpose of accurately controlling the rotating speed of the outdoor fan to delay the frosting of the outdoor unit to the maximum extent.
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 (7)
1. An air conditioner frost suppression control method, comprising the steps of:
detecting the current value of an outdoor fan of the air conditioner in real time;
if the detected real-time current value is equal to the standard current value, detecting the current value I of the outdoor fan of the air conditioner once every first preset timen；
If In－In-1If the current value is more than or equal to the set current value, controlling the rotating speed of the outdoor fan to be a second rotating speed;
detecting the temperature of the outer coil pipe under the condition that the outdoor fan is at a second rotating speed;
selectively controlling the rotation speed of the outdoor fan according to the temperature of the outer coil pipe;
if the temperature of the external coil pipe minus the dew point temperature is less than or equal to a set value, controlling the rotating speed of the outdoor fan to be a third rotating speed;
under the condition that the temperature of the external coil minus the dew point temperature is less than or equal to a set value, controlling the outdoor fan to reduce the preset revolution number every second preset time;
wherein, the third rotating speed is the first rotating speed of-200 revolutions;
wherein the standard current value isMeasuring the current value of an outdoor fan under the condition that an outdoor unit is not frosted; the second rotating speed is equal to the first rotating speed, and is 50 revolutions; i isn-1Is InThe last detected current value, n is a positive integer greater than 1,
the first rotating speed is the rotating speed of the outdoor fan when the outdoor fan is at the highest gear.
2. The air conditioner frosting suppression control method of claim 1, wherein the first preset time is 1 minute and/or the set current value is 0.05A.
3. The air conditioner frost suppression control method of claim 1, wherein the current value I of the outdoor fan of the air conditioner is detected every first preset time if the detected real-time current value is equal to the standard current valuen"in the step (a) of (b),
and if the detected current value is equal to the standard current value, controlling the rotating speed of the outdoor fan to be the first rotating speed.
4. The air conditioner frost suppression control method according to claim 1, wherein the set value is any value within an interval [ -4, -2 ].
5. The air conditioner frost suppression control method according to claim 4, wherein the set value is-3.
6. The air conditioner frost suppression control method according to claim 1, wherein the second preset time is any time between 55 and 65 seconds; and/or
The preset number of revolutions is any number of revolutions between 8 and 12 revolutions.
7. The air conditioner frost suppression control method according to claim 6, wherein the second preset time is 60 seconds; and/or
The preset number of revolutions is 10 revolutions.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810939432.7A CN110836435B (en) | 2018-08-17 | 2018-08-17 | Control method for inhibiting frosting of air conditioner |
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| CN201810939432.7A CN110836435B (en) | 2018-08-17 | 2018-08-17 | Control method for inhibiting frosting of air conditioner |
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| CN110836435A CN110836435A (en) | 2020-02-25 |
| CN110836435B true CN110836435B (en) | 2021-07-02 |
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| CN111692706B (en) * | 2020-06-05 | 2022-07-19 | 宁波奥克斯电气股份有限公司 | Defrosting control method and device and air conditioner |
| CN114413413B (en) * | 2021-12-13 | 2023-10-31 | 珠海格力电器股份有限公司 | Defrosting method of air conditioner and air conditioner |
| CN115789866B (en) * | 2022-11-25 | 2024-06-11 | 宁波奥克斯电气股份有限公司 | Air conditioner heating defrosting control method and device, air conditioner and storage medium |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105980784A (en) * | 2014-03-28 | 2016-09-28 | 江森自控日立空调技术（香港）有限公司 | Air conditioner |
| CN107202408A (en) * | 2017-06-21 | 2017-09-26 | 广东美的暖通设备有限公司 | Control method, device and the air-conditioning of rotating speed of air conditioner fan |
| CN107270479A (en) * | 2017-06-19 | 2017-10-20 | 广东美的暖通设备有限公司 | The control method and control system of outdoor fan of air conditioner |
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| JP2003161496A (en) * | 2001-11-20 | 2003-06-06 | Fujitsu General Ltd | Control method for air conditioner |
| CN107687728B (en) * | 2017-09-07 | 2020-12-15 | 科希曼电器有限公司 | Air energy heat pump defrosting control method for judging condensation point |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105980784A (en) * | 2014-03-28 | 2016-09-28 | 江森自控日立空调技术（香港）有限公司 | Air conditioner |
| CN107270479A (en) * | 2017-06-19 | 2017-10-20 | 广东美的暖通设备有限公司 | The control method and control system of outdoor fan of air conditioner |
| CN107202408A (en) * | 2017-06-21 | 2017-09-26 | 广东美的暖通设备有限公司 | Control method, device and the air-conditioning of rotating speed of air conditioner fan |
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Effective date of registration: 20210611 Address after: 430056 Haier Industrial Park, No. 98, Checheng East Road, Wuhan Economic and Technological Development Zone, Hubei Province Applicant after: WUHAN HAIER ELECTRIC APPLIANCE 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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