CN110836456A - Control method for inhibiting frosting of air conditioner - Google Patents
Control method for inhibiting frosting of air conditioner Download PDFInfo
- Publication number
- CN110836456A CN110836456A CN201810940025.8A CN201810940025A CN110836456A CN 110836456 A CN110836456 A CN 110836456A CN 201810940025 A CN201810940025 A CN 201810940025A CN 110836456 A CN110836456 A CN 110836456A
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- China
- Prior art keywords
- air conditioner
- temperature
- outdoor fan
- control method
- rotating speed
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Classifications
-
- 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
-
- 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 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 temperature of an external coil of the air conditioner; comparing the outer coil temperature to a dew point temperature; if the temperature of the outer coil pipe minus the dew point temperature is more than or equal to a first set value, controlling the rotating speed of the outdoor fan to be a first rotating speed; and under the condition that the temperature of the external coil minus the dew point temperature is greater than or equal to a first set value, controlling the outdoor fan to reduce a preset revolution number at intervals of preset time, wherein the first revolution number is the revolution number of the outdoor fan at the highest gear. The invention mainly utilizes the difference between the temperature of the outer coil pipe and the dew point temperature to control the rotating 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 defrosting times and reducing the influence on the indoor temperature.
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 temperature of an external coil of the air conditioner; comparing the outer coil temperature to a dew point temperature; if the temperature of the outer coil pipe minus the dew point temperature is more than or equal to a first set value, controlling the rotating speed of the outdoor fan to be a first rotating speed; and under the condition that the temperature of the external coil minus the dew point temperature is greater than or equal to a first set value, controlling the outdoor fan to reduce preset revolution at preset intervals, wherein the first revolution is the revolution when the outdoor fan is at the highest gear.
In a preferred embodiment of the above air conditioner frost suppression control method, the method further includes: if the temperature of the external coil minus the dew point temperature is less than a first set value and greater than a second set value, controlling the rotating speed of the outdoor fan to be a second rotating speed; wherein the second rotation speed is-50 rotations of the first rotation speed.
In a preferred embodiment of the above air conditioner frost suppression control method, the method further includes: if the temperature of the external coil pipe minus the dew point temperature is less than or equal to a second 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-described air conditioner frost suppression control method, the first set value is an arbitrary value within a range [ -1,1 ].
In a preferred embodiment of the above air conditioner frost formation suppression control method, the first set value is 0.
In a preferred embodiment of the above-described air conditioner frost suppression control method, the second 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 second set value is-3.
In a preferred embodiment of the above air conditioner frosting inhibition control method, the preset time is any time between 55 and 65 seconds; and/or the preset number of revolutions is any number of revolutions between 15 and 25 revolutions.
In a preferred embodiment of the above air conditioner frost formation suppression control method, the preset time is 60 seconds; and/or the preset number of revolutions is 20 revolutions.
In the technical scheme of the invention, the difference between the temperature of the outer coil pipe and the dew point temperature is mainly utilized to control the rotating speed of the outdoor fan, the frosting possibility and the frosting speed of the outdoor unit can be more accurately judged, and on the premise of ensuring the heating operation efficiency of the air conditioner, the rotating speed of the outdoor fan is adaptively adjusted, and the frosting speed of the air conditioner is delayed as much as possible, so that the defrosting times are reduced, and the influence on the indoor temperature is reduced. And the reduction of the temperature of the outer coil pipe is delayed by reducing the revolution of the outdoor fan at preset time intervals, so that the temperature of the outdoor coil pipe is maintained to be higher than the dew point temperature as much as possible, and the frosting speed of the air conditioner is further delayed.
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 temperature of an external coil of the air conditioner; s120, comparing the temperature of the outer coil with the dew point temperature; s130, if the temperature of the external coil minus the dew point temperature is greater than or equal to a first set value, controlling the rotating speed of the outdoor fan to be a first rotating speed; and S140, controlling the outdoor fan to reduce the preset revolution at preset time intervals under the condition that the temperature of the external coil minus the dew point temperature is more than or equal to a first set value. The first rotating speed is the rotating speed of the outdoor fan when the outdoor fan is at the highest gear. 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 temperature of the external coil can directly predict the frosting possibility of the outdoor unit, and 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 control of the rotating speed of the outdoor fan through the comparison of the temperature of the external coil and the dew point temperature can play a role in inhibiting frosting.
In step S130, since the temperature of the external coil is greater than the dew point temperature, the outdoor unit will not frost, and therefore the wind speed of the outdoor fan is controlled to be the high-grade wind speed, which can improve the heat exchange efficiency. In step S140, as the heating operation time of the air conditioner increases, the frosting risk of the outdoor coil increases, and at this time, the reduction of the temperature of the outdoor coil is delayed by reducing the number of revolutions of the outdoor fan every preset time, so as to maintain the temperature of the outdoor coil to be higher than the dew point temperature as much as possible, thereby further delaying the frosting speed of the air conditioner. As an example, in step S140, the preset time may be 60 seconds, or any time between 55-65 seconds; the preset number of revolutions may be 20 revolutions or any number of revolutions between 15 and 25 revolutions, and those skilled in the art can flexibly and reasonably set the preset number of revolutions according to the actual condition of the air conditioner.
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 temperature of the external coil of the air conditioner is detected, step S210 is first executed to compare the temperature Toil of the external coil with the dew-point temperature Te; and if the Toil-Te is larger than or equal to the first set value, executing the step S220 and controlling the rotating speed of the outdoor fan to be the first rotating speed. Wherein, the first set value can be 0, or can be any value in the interval [ -1,1 ]; the first rotating speed is the rotating speed when the outdoor fan is at the highest gear, and the outdoor fan is at a high-grade wind speed. As can be understood by those skilled in the art, when Toil-Te is more than or equal to 0, namely the temperature of the outer coil pipe is more than the dew point temperature, the outdoor unit does not frost, so that the air speed of the outdoor fan is controlled to be high-grade air speed, and the heat exchange efficiency can be improved.
After step S220, the process proceeds to step S221, and when Toil is more than or equal to Te, the outdoor fan is controlled to reduce 20 revolutions per 60 seconds, so as to maintain the temperature of the outdoor coil to be higher than the dew point temperature.
And if the second set value < Toil-Te < the first set value, executing step S230, and controlling the rotating speed of the outdoor fan to be a second rotating speed. Wherein, the second set value can be-3, or any value in the interval [ -4, -2 ]; the second speed is-50 revolutions of the first speed. It will be understood by those skilled in the art that when-3 < Toil-Te < 0, indicating that the outside coil temperature is below the dew point temperature, but not too much below the dew point temperature, then the outdoor unit begins to frost, but at a slow rate. Therefore, the frosting is delayed by reducing the rotating speed of the outdoor fan, and the frosting speed is slow, so that the outdoor fan can be reduced to the second rotating speed, and the heat exchange efficiency of the air conditioner is ensured as much as possible on the premise of delaying the frosting.
And if the Toil-Te is less than or equal to the second set value, executing the step S240, and 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. It will be understood by those skilled in the art that when Toil-Te ≦ -3, it means that the outdoor unit frosts faster when the outside coil temperature is less than the dew point temperature and more below the dew point temperature, and thus, the frosting is further delayed by reducing the speed of the outdoor fan to the third rotational speed.
In summary, the present invention mainly uses the difference between the temperature of the external coil and the dew point temperature to control the rotation speed of the outdoor fan, so as to more accurately determine the frosting possibility and the frosting speed of the outdoor unit, and adaptively adjust the rotation speed of the outdoor fan on the premise of ensuring the heating operation efficiency of the air conditioner, so as to delay the frosting speed of the air conditioner as much as possible, thereby reducing the number of times of defrosting and reducing the influence on the indoor temperature. And the reduction of the temperature of the outer coil pipe is delayed by reducing the revolution of the outdoor fan at preset time intervals, and the temperature of the outer coil pipe is maintained to be higher than the dew point temperature as much as possible, so that the frosting speed of the air conditioner is further delayed.
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 frost suppression control method, comprising the steps of:
detecting the temperature of an external coil of the air conditioner;
comparing the outer coil temperature to a dew point temperature;
if the temperature of the outer coil pipe minus the dew point temperature is more than or equal to a first set value, controlling the rotating speed of the outdoor fan to be a first rotating speed;
and, under the condition that the temperature of the external coil minus the dew point temperature is more than or equal to a first set value, controlling the outdoor fan to reduce the preset revolution number at preset time intervals,
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 frost suppression control method according to claim 1, further comprising:
if the temperature of the external coil minus the dew point temperature is less than a first set value and greater than a second set value, controlling the rotating speed of the outdoor fan to be a second rotating speed;
wherein the second rotation speed is-50 rotations of the first rotation speed.
3. The air conditioner frost suppression control method according to claim 1, further comprising:
if the temperature of the external coil pipe minus the dew point temperature is less than or equal to a second 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.
4. The air conditioner frost suppression control method according to any of claims 1 to 3, wherein the first set value is any value within an interval [ -1,1 ].
5. The air conditioner frost suppression control method according to claim 4, wherein the first set value is 0.
6. The air conditioner frost suppression control method according to claim 2 or 3, wherein the second set value is any value within an interval [ -4, -2 ].
7. The air conditioner frost suppression control method according to claim 6, wherein the second set value is-3.
8. The air conditioner frost suppression control method according to any of claims 1 to 3, wherein the preset time is any time between 55-65 seconds; and/or
The preset number of revolutions is any number of revolutions between 15 and 25 revolutions.
9. The air conditioner frost suppression control method according to claim 8, wherein the preset time is 60 seconds; and/or
The preset number of revolutions is 20 revolutions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810940025.8A CN110836456A (en) | 2018-08-17 | 2018-08-17 | Control method for inhibiting frosting of air conditioner |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810940025.8A CN110836456A (en) | 2018-08-17 | 2018-08-17 | Control method for inhibiting frosting of air conditioner |
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| CN110836456A true CN110836456A (en) | 2020-02-25 |
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| CN201810940025.8A Pending CN110836456A (en) | 2018-08-17 | 2018-08-17 | Control method for inhibiting frosting of air conditioner |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112283878A (en) * | 2020-09-18 | 2021-01-29 | 珠海格力电器股份有限公司 | Air conditioner control method and device, storage medium and air conditioner |
| WO2021223531A1 (en) * | 2020-05-14 | 2021-11-11 | 青岛海尔空调电子有限公司 | Air conditioner and control method therefor |
| CN114484739A (en) * | 2022-01-12 | 2022-05-13 | 青岛海尔空调器有限总公司 | Defrosting control method for air conditioner |
| CN114543185A (en) * | 2022-02-16 | 2022-05-27 | 青岛海信日立空调系统有限公司 | Air conditioning system |
| CN115355598A (en) * | 2022-08-18 | 2022-11-18 | 宁波奥克斯电气股份有限公司 | Defrosting control method of air conditioner and air conditioner |
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| CN115355598A (en) * | 2022-08-18 | 2022-11-18 | 宁波奥克斯电气股份有限公司 | Defrosting control method of air conditioner and air conditioner |
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Application publication date: 20200225 |