CN112594870A - Air conditioner and defrosting control method thereof - Google Patents
Air conditioner and defrosting control method thereof Download PDFInfo
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- CN112594870A CN112594870A CN202011612279.0A CN202011612279A CN112594870A CN 112594870 A CN112594870 A CN 112594870A CN 202011612279 A CN202011612279 A CN 202011612279A CN 112594870 A CN112594870 A CN 112594870A
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- air conditioner
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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
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/0007—Indoor units, e.g. fan coil units
- F24F1/0018—Indoor units, e.g. fan coil units characterised by fans
- F24F1/0022—Centrifugal or radial fans
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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
- F24F11/54—Control or safety arrangements characterised by user interfaces or communication using one central controller connected to several sub-controllers
-
- 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
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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
- F24F11/62—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
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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
- F24F11/62—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
Abstract
The invention provides an air conditioner and a defrosting control method thereof, wherein the air conditioner comprises: the invention relates to an air supply motor, a centrifugal fan blade, a power detection module, a current detection module, a temperature detection module, a storage module and a central processing unit, wherein the air supply motor has the beneficial effects that: the frosting degree of the outdoor heat exchanger when the air conditioner receives a shutdown signal is accurately judged, and then whether the air conditioner needs to be defrosted firstly and then shut down is judged, so that the frosted operation of the outdoor heat exchanger when the air conditioner is started for heating next time is completely avoided, the heating effect is improved, and the safe operation of the air conditioner is protected.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to an air conditioner and a defrosting method of the air conditioner.
Technical Field
At present, when the air conditioner is in heating operation in winter and the outdoor environment temperature is low, the outdoor heat exchanger frosts to different degrees, so the air conditioner can be automatically switched to a defrosting mode to melt the frost layer on the outdoor heat exchanger after a certain time interval. However, when the outdoor heat exchanger frosts seriously, but the air conditioner does not enter the defrosting mode, the air conditioner receives a shutdown signal, if the outdoor environment temperature is low, the frost layer on the outdoor heat exchanger cannot be melted automatically after shutdown, when the air conditioner is started for heating next time, because the frost layer is accumulated on the outdoor heat exchanger, the heating effect is poor, even because the frost layer is accumulated with higher speed, the later defrosting is not clean, the human body comfort is affected, and the electric energy is wasted, and the compressor can be started or a liquid refrigerant is sucked into the compressor in the running process to burn the compressor in serious cases.
In summary, how to defrost to improve the defrosting effect and reduce the influence on the heating effect of the air conditioner is a problem to be solved by those skilled in the art.
Disclosure of Invention
The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview nor is intended to identify key/critical elements or to delineate the scope of such embodiments but rather as a prelude to the more detailed description that is presented later.
In view of the above problems in the prior art, an object of the present invention is to provide a defrosting method for an air conditioner, which can accurately determine the frosting degree of an outdoor heat exchanger when the air conditioner receives a shutdown signal, and further determine whether the air conditioner needs to be powered off after defrosting is performed.
In order to achieve the above object, the present invention provides a defrosting control method for an air conditioner, which is characterized by comprising the following steps:
s1: when the air conditioner receives a shutdown signal, judging whether the air conditioner operates in a heating mode;
s2: if the air conditioner runs in a heating mode, the power detection module detects the consumed power P1 of the air supply motor at the moment before the air conditioner is shut down, the power detection module detects the minimum value P0 of the consumed power of the air supply motor at the first set time after the air conditioner is heated and runs, meanwhile, the current detection module detects the current L1 of the air supply motor at the moment before the air conditioner is shut down, and the current detection module detects the minimum value L0 of the current of the air supply motor at the first set time after the air conditioner is heated and runs;
s3: judging the relation between P1-P0 and a preset power attenuation judgment value delta P according to the detected parameters, and judging the relation between L1-L0 and a preset current attenuation judgment value delta L;
if the magnitude relation of P1-P0 and delta P meets the first condition, or the magnitude relation of L1-L0 and delta L meets the second condition, then the next step is carried out;
and if the magnitude relation between P1-P0 and delta P meets a third condition, or the magnitude relation between L1-L0 and delta L meets a fourth condition, controlling the air conditioner to shut down.
S4: acquiring an outdoor environment temperature parameter detected before the air conditioner receives a shutdown signal, and judging the magnitude relation between the outdoor environment temperature T before the air conditioner receives the shutdown signal and a preset outdoor environment temperature comparison value T0;
if the outdoor environment temperature T before the air conditioner receives the shutdown signal and the preset outdoor environment temperature comparison value T0 meet a fifth condition, switching to the defrosting mode for operation;
and if the outdoor environment temperature T before the air conditioner receives the shutdown signal and the preset outdoor environment temperature comparison value T0 meet the sixth condition, the defrosting mode is not executed, and the air conditioner is controlled to be shut down.
Further, the first condition is that the air supply motor power P1 at the moment before the shutdown-the minimum value P0 of the air supply motor power P1 at the moment before the shutdown is greater than or equal to the preset power attenuation judgment value delta P.
Further, the second condition is that the blowing motor current L1-the minimum value L0 of the blowing motor current at the moment before the shutdown is larger than or equal to the preset current attenuation judgment value delta L.
Further, the third condition is that the power of the wind power supply P1-the minimum value P0 of the power of the wind power supply motor is shut down < the preset power attenuation determination value delta P at the moment before the shutdown.
Further, the fourth condition is that the blowing motor current L1-the minimum value L0 of the blowing motor current is less than the preset current attenuation determination value Delta L at the moment before the shutdown.
Further, the fifth condition is that the outdoor environment temperature T is less than or equal to a preset outdoor environment temperature comparison value T0.
Further, the sixth condition is that the outdoor ambient temperature T > a preset outdoor ambient temperature comparison value T0.
Further, the first set time is 1-15 minutes.
Further, the first set time is 3-5 minutes.
Based on the defrosting method of the air conditioner, the invention also provides the air conditioner, which comprises the following steps: the device comprises an air supply motor, a centrifugal fan blade, a power detection module, a current detection module, a temperature detection module, a storage module and a central processing unit.
The air supply motor is used for driving the centrifugal fan blade;
the centrifugal fan blade is used for conveying air volume to the outdoor heat exchanger through centrifugal force generated by rotation of the impeller;
the power detection module is used for detecting the power of the air supply motor;
the current detection module is used for detecting the current of the air supply motor;
the temperature detection module is used for detecting the outdoor environment temperature T;
the storage module is used for storing the consumed power of the air supply motor, the preset power attenuation judgment value delta P and the preset outdoor environment temperature comparison value T0 which are detected by the power detection module in real time, and storing the current of the air supply motor, the preset current attenuation judgment value delta L and the preset outdoor environment temperature comparison value T0 which are detected by the current detection module in real time;
and the central processing unit is used for comparing the detected data and controlling the operation mode of the air conditioner.
The invention has the beneficial effects that: the frosting degree of the outdoor heat exchanger when the air conditioner receives a shutdown signal is accurately judged, and then whether the air conditioner needs to be defrosted firstly and then shut down is judged, so that the frosted operation of the outdoor heat exchanger when the air conditioner is started for heating next time is completely avoided, the heating effect is improved, and the safe operation of the air conditioner is protected.
Drawings
Fig. 1 is a schematic flow chart illustrating a defrosting method for an air conditioner according to an embodiment of the present invention;
fig. 2 is a schematic diagram of an air conditioner according to an embodiment of the present invention.
Detailed Description
So that the manner in which the features and elements of the disclosed embodiments can be understood in detail, a more particular description of the disclosed embodiments, briefly summarized above, may be had by reference to the embodiments, some of which are illustrated in the appended drawings. In the following description of the technology, for purposes of explanation, numerous details are set forth in order to provide a thorough understanding of the disclosed embodiments. However, one or more embodiments may be practiced without these details. In other instances, well-known structures and devices may be shown in simplified form in order to simplify the drawing.
The terms "including" and "having," and any variations thereof, in the description and claims of embodiments of the present disclosure and the above-described drawings are intended to cover non-exclusive inclusions.
Referring to fig. 1, the present invention provides a defrosting control method for an air conditioner, which is characterized by comprising the following steps:
s1: when the air conditioner receives a shutdown signal, judging whether the air conditioner operates in a heating mode;
s2: if the air conditioner runs in a heating mode, the power detection module detects the consumed power P1 of the air supply motor at the moment before the air conditioner is shut down, the power detection module detects the minimum value P0 of the consumed power of the air supply motor at the first set time after the air conditioner is heated and runs, meanwhile, the current detection module detects the current L1 of the air supply motor at the moment before the air conditioner is shut down, and the current detection module detects the minimum value L0 of the current of the air supply motor at the first set time after the air conditioner is heated and runs;
s3: judging the relation between P1-P0 and a preset power attenuation judgment value delta P according to the detected parameters, and judging the relation between L1-L0 and a preset current attenuation judgment value delta L;
if the magnitude relation of P1-P0 and delta P meets the first condition, or the magnitude relation of L1-L0 and delta L meets the second condition, then the next step is carried out;
and if the magnitude relation between P1-P0 and delta P meets a third condition, or the magnitude relation between L1-L0 and delta L meets a fourth condition, controlling the air conditioner to shut down.
S4: acquiring an outdoor environment temperature parameter detected before the air conditioner receives a shutdown signal, and judging the magnitude relation between the outdoor environment temperature T before the air conditioner receives the shutdown signal and a preset outdoor environment temperature comparison value T0;
if the outdoor environment temperature T before the air conditioner receives the shutdown signal and the preset outdoor environment temperature comparison value T0 meet a fifth condition, switching to the defrosting mode for operation;
and if the outdoor environment temperature T before the air conditioner receives the shutdown signal and the preset outdoor environment temperature comparison value T0 meet the sixth condition, the defrosting mode is not executed, and the air conditioner is controlled to be shut down.
It is understood that when the air conditioner receives a shutdown operation signal, whether the air conditioner operates in a heating mode can be judged, when the central processing unit compares the detected power P1 of the air supply motor before shutdown with the lowest power P0 of the air supply motor during a period of heating startup operation, if the first condition or the second condition is met, the next step of judging the outdoor environment temperature T is carried out, when the outdoor environment temperature T is judged to meet the fifth condition, the air conditioner is defrosted before receiving the shutdown signal and then is shut down, if the three conditions cannot be met simultaneously, the air conditioner is directly shut down, the outdoor environment temperature parameter detected before receiving the shutdown signal is obtained, the magnitude relation between the outdoor environment temperature T before receiving the shutdown signal and the preset outdoor environment temperature comparison value T0 is judged, and therefore the frosting condition of the outdoor heat exchanger of the air conditioner is judged more accurately, the problem that the air conditioner is free of frost and cannot be detected due to frost is solved, the central processing unit controls the air conditioner to enter defrosting operation, defrosting operation is stopped after a frost layer on the outdoor heat exchanger is melted, and the air conditioner is controlled to be shut down.
Further, the first condition is that the air supply motor power P1 at the moment before the shutdown-the minimum value P0 of the air supply motor power P1 at the moment before the shutdown is greater than or equal to the preset power attenuation judgment value delta P.
Further, the second condition is that the blowing motor current L1-the minimum value L0 of the blowing motor current at the moment before the shutdown is larger than or equal to the preset current attenuation judgment value delta L.
Further, the third condition is that the power of the wind power supply P1-the minimum value P0 of the power of the wind power supply motor is shut down < the preset power attenuation determination value delta P at the moment before the shutdown.
Further, the fourth condition is that the blowing motor current L1-the minimum value L0 of the blowing motor current is less than the preset current attenuation determination value Delta L at the moment before the shutdown.
Further, the fifth condition is that the outdoor environment temperature T is less than or equal to a preset outdoor environment temperature comparison value T0.
Further, the sixth condition is that the outdoor ambient temperature T > a preset outdoor ambient temperature comparison value T0.
Further, the first set time is 1-15 minutes.
Further, the first set time is 3-5 minutes.
Based on the defrosting method for the air conditioner provided by the above embodiment, another aspect of the present invention further provides an air conditioner, which is shown in fig. 2 and includes: the device comprises an air supply motor, a centrifugal fan blade, a power detection module, a current detection module, a temperature detection module, a storage module and a central processing unit.
The air supply motor is used for driving the centrifugal fan blade;
the centrifugal fan blade is used for conveying air volume to the outdoor heat exchanger through centrifugal force generated by rotation of the impeller;
the power detection module is used for detecting the power of the air supply motor;
the current detection module is used for detecting the current of the air supply motor;
the temperature detection module is used for detecting the outdoor environment temperature T;
the storage module is used for storing the consumed power of the air supply motor, the preset power attenuation judgment value delta P and the preset outdoor environment temperature comparison value T0 which are detected by the power detection module in real time, and storing the current of the air supply motor, the preset current attenuation judgment value delta L and the preset outdoor environment temperature comparison value T0 which are detected by the current detection module in real time;
and the central processing unit is used for comparing the detected data and controlling the operation mode of the air conditioner.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. The defrosting control method of the air conditioner is characterized by comprising the following steps:
s1: when the air conditioner receives a shutdown signal, judging whether the air conditioner operates in a heating mode;
s2: if the air conditioner runs in a heating mode, the power detection module detects the consumed power P1 of the air supply motor at the moment before the air conditioner is shut down, the power detection module detects the minimum value P0 of the consumed power of the air supply motor at the first set time after the air conditioner is heated and runs, meanwhile, the current detection module detects the current L1 of the air supply motor at the moment before the air conditioner is shut down, and the current detection module detects the minimum value L0 of the current of the air supply motor at the first set time after the air conditioner is heated and runs;
s3: judging the relation between P1-P0 and a preset power attenuation judgment value delta P according to the detected parameters, and judging the relation between L1-L0 and a preset current attenuation judgment value delta L;
if the magnitude relation of P1-P0 and delta P meets the first condition, or the magnitude relation of L1-L0 and delta L meets the second condition, then the next step is carried out;
and if the magnitude relation between P1-P0 and delta P meets a third condition, or the magnitude relation between L1-L0 and delta L meets a fourth condition, controlling the air conditioner to shut down.
S4: acquiring an outdoor environment temperature parameter detected before the air conditioner receives a shutdown signal, and judging the magnitude relation between the outdoor environment temperature T before the air conditioner receives the shutdown signal and a preset outdoor environment temperature comparison value T0;
if the outdoor environment temperature T before the air conditioner receives the shutdown signal and the preset outdoor environment temperature comparison value T0 meet a fifth condition, switching to the defrosting mode for operation;
and if the outdoor environment temperature T before the air conditioner receives the shutdown signal and the preset outdoor environment temperature comparison value T0 meet the sixth condition, the defrosting mode is not executed, and the air conditioner is controlled to be shut down.
2. The defrosting control method of an air conditioner according to claim 1, wherein the first condition is that the air supply motor power P1-the minimum value of the air supply motor power P0 before the air conditioner is turned off is greater than or equal to a preset power attenuation determination value Δ P.
3. The defrosting control method of an air conditioner according to claim 1, wherein the second condition is that the blower motor current L1-the minimum value of the blower motor current L0 is greater than or equal to a preset current attenuation determination value Δ L at a time before shutdown.
4. The defrosting control method of an air conditioner according to claim 1, wherein the third condition is that the air blowing motor power P1-the minimum value of the air blowing motor power P0 is off < the preset power attenuation determination value Δ P at the moment before the shutdown.
5. The defrosting control method of an air conditioner according to claim 1, wherein the fourth condition is that the blower motor current L1-the minimum value of the blower motor current L0 < a preset current attenuation determination value Δ L at a time before shutdown.
6. The defrosting control method of an air conditioner according to claim 1, wherein the fifth condition is that the outdoor ambient temperature T is less than or equal to a preset outdoor ambient temperature comparison value T0.
7. The defrosting control method of an air conditioner according to claim 1, wherein the sixth condition is that the outdoor ambient temperature T > a preset outdoor ambient temperature comparison value T0.
8. The defrosting control method of an air conditioner according to claim 1, wherein the first set time is between 1 and 15 minutes.
9. The defrosting control method of an air conditioner according to claim 1, wherein the first set time is between 3 and 5 minutes.
10. An air conditioner adopting the defrosting method of an air conditioner according to any one of claims 1 to 9, comprising: the device comprises an air supply motor, a centrifugal fan blade, a power detection module, a current detection module, a temperature detection module, a storage module and a central processing unit.
The air supply motor is used for driving the centrifugal fan blade;
the centrifugal fan blade is used for conveying air volume to the outdoor heat exchanger through centrifugal force generated by rotation of the impeller;
the power detection module is used for detecting the power of the air supply motor;
the current detection module is used for detecting the current of the air supply motor;
the temperature detection module is used for detecting the outdoor environment temperature T;
the storage module is used for storing the consumed power of the air supply motor, the preset power attenuation judgment value delta P and the preset outdoor environment temperature comparison value T0 which are detected by the power detection module in real time, and storing the current of the air supply motor, the preset current attenuation judgment value delta L and the preset outdoor environment temperature comparison value T0 which are detected by the current detection module in real time;
and the central processing unit is used for comparing the detected data and controlling the operation mode of the air conditioner.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011612279.0A CN112594870B (en) | 2020-12-30 | 2020-12-30 | Air conditioner and defrosting control method thereof |
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| CN202011612279.0A CN112594870B (en) | 2020-12-30 | 2020-12-30 | Air conditioner and defrosting control method thereof |
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| CN112594870A true CN112594870A (en) | 2021-04-02 |
| CN112594870B CN112594870B (en) | 2022-03-08 |
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| JP2014169802A (en) * | 2013-03-01 | 2014-09-18 | Mitsubishi Electric Corp | Air conditioning device |
| CN105157290A (en) * | 2014-05-26 | 2015-12-16 | 广东美的制冷设备有限公司 | Air conditioner and defrosting control method thereof |
| CN105588267A (en) * | 2015-05-29 | 2016-05-18 | 青岛海信日立空调系统有限公司 | Defrosting control method and device for automatically detecting frost quantity of heat pump system |
| CN106032929A (en) * | 2015-03-19 | 2016-10-19 | Tcl空调器(中山)有限公司 | Defrosting control method and device |
| CN108981082A (en) * | 2018-07-18 | 2018-12-11 | 珠海格力电器股份有限公司 | Air-conditioning defrosting control method, control device and air-conditioning |
| CN111336648A (en) * | 2020-03-16 | 2020-06-26 | 宁波奥克斯电气股份有限公司 | Air conditioner defrosting control method and device, storage medium and air conditioner |
-
2020
- 2020-12-30 CN CN202011612279.0A patent/CN112594870B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014169802A (en) * | 2013-03-01 | 2014-09-18 | Mitsubishi Electric Corp | Air conditioning device |
| CN105157290A (en) * | 2014-05-26 | 2015-12-16 | 广东美的制冷设备有限公司 | Air conditioner and defrosting control method thereof |
| CN106032929A (en) * | 2015-03-19 | 2016-10-19 | Tcl空调器(中山)有限公司 | Defrosting control method and device |
| CN105588267A (en) * | 2015-05-29 | 2016-05-18 | 青岛海信日立空调系统有限公司 | Defrosting control method and device for automatically detecting frost quantity of heat pump system |
| CN108981082A (en) * | 2018-07-18 | 2018-12-11 | 珠海格力电器股份有限公司 | Air-conditioning defrosting control method, control device and air-conditioning |
| CN111336648A (en) * | 2020-03-16 | 2020-06-26 | 宁波奥克斯电气股份有限公司 | Air conditioner defrosting control method and device, storage medium and air conditioner |
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