CN113251629A - Control method of air conditioner - Google Patents
Control method of air conditioner Download PDFInfo
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- CN113251629A CN113251629A CN202110425635.6A CN202110425635A CN113251629A CN 113251629 A CN113251629 A CN 113251629A CN 202110425635 A CN202110425635 A CN 202110425635A CN 113251629 A CN113251629 A CN 113251629A
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- outdoor fan
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- heat exchanger
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- 238000000034 method Methods 0.000 title claims abstract description 46
- 238000001514 detection method Methods 0.000 claims abstract description 36
- 238000004140 cleaning Methods 0.000 claims description 8
- 230000007257 malfunction Effects 0.000 description 8
- 238000009423 ventilation Methods 0.000 description 4
- 239000003507 refrigerant Substances 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 238000007664 blowing Methods 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003703 image analysis method Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- -1 leaves Substances 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 239000000126 substance Substances 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
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
- F24F11/79—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling the direction of the supplied air
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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
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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
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/87—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling absorption or discharge of heat in outdoor units
- F24F11/871—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling absorption or discharge of heat in outdoor units by controlling outdoor fans
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Signal Processing (AREA)
- Human Computer Interaction (AREA)
- Thermal Sciences (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention relates to the technical field of air conditioners, and particularly provides a control method of an air conditioner. The invention aims to solve the problem that the heat exchange efficiency is reduced because foreign matters are attached to an outdoor heat exchanger. To this end, the control method of the present invention includes: when the outdoor fan runs, whether foreign matters exist on the surface of the outdoor heat exchanger or not is detected through a foreign matter detector; if foreign matters exist, controlling the outdoor fan to rotate reversely for a first preset time; after controlling the outdoor fan to rotate reversely for a first preset time, detecting whether foreign matters exist on the surface of the outdoor heat exchanger through the foreign matter detector again; and controlling the running direction of the outdoor fan and the working state of the foreign matter detector based on the detection result of the second detection. The invention controls the running direction of the outdoor fan and the working state of the foreign matter detector through the detection result of the foreign matter detector, thereby removing the foreign matters on the surface of the outdoor heat exchanger and ensuring the heat exchange efficiency of the outdoor heat exchanger.
Description
Technical Field
The invention relates to the technical field of air conditioners, and particularly provides a control method of an air conditioner.
Background
The outdoor unit of the air conditioner is usually placed in an outdoor environment and comprises a box body, an outdoor fan and an outdoor heat exchanger, wherein the outdoor fan and the outdoor heat exchanger are arranged in the box body, a ventilation structure is arranged on the box body, when the air conditioner operates, the outdoor fan rotates, air in the outdoor environment enters the box body through the ventilation structure under the action of the outdoor fan, and then the air is discharged out of the box body through the ventilation structure after exchanging heat with the outdoor heat exchanger, so that the purpose of heat exchange is achieved.
However, there are a large number of foreign substances, such as leaves, plastic bags, etc., in the outdoor environment. When there are foreign matters such as leaf, plastic bag around the off-premises station, these foreign matters are very easily along with the air enters into in the box via ventilation structure together to paste tightly and lean on outdoor heat exchanger, even air conditioner stop operation, these foreign matters also are difficult for coming off from the heat exchanger, thereby make the effective heat transfer area of heat exchanger reduce greatly, this refrigeration or the heating performance that just leads to the air conditioner reduce, thereby reduce user's use and experience.
Accordingly, there is a need in the art for a new solution to the above problems.
Disclosure of Invention
In order to solve the above problems in the prior art, that is, in order to solve the problem of the reduction of the heat exchange efficiency of the outdoor heat exchanger caused by the attachment of foreign matters to the outdoor heat exchanger, the present invention provides a control method of an air conditioner, the air conditioner includes an outdoor unit, the outdoor unit includes an outdoor fan and an outdoor heat exchanger, the outdoor unit is provided with a foreign matter detector at a position close to the outdoor heat exchanger, and the foreign matter detector is used for detecting whether foreign matters exist on the surface of the outdoor heat exchanger; the control method comprises the following steps: when the outdoor fan runs, detecting whether foreign matters exist on the surface of the outdoor heat exchanger through the foreign matter detector; controlling an operation direction of the outdoor fan based on the detection result; the step of controlling the operation direction of the outdoor fan based on the detection result further includes: if foreign matters exist, controlling the outdoor fan to rotate reversely for a first preset time; after the outdoor fan is controlled to rotate reversely for a first preset time, detecting whether foreign matters exist on the surface of the outdoor heat exchanger through the foreign matter detector again; and controlling the operation direction of the outdoor fan and the working state of the foreign matter detector based on the re-detected detection result.
In a preferred embodiment of the above control method, the step of "controlling the operation direction of the outdoor fan and the operation state of the foreign matter detector based on the re-detected detection result" further includes: and if no foreign matters exist, controlling the outdoor fan to rotate forwards, and controlling the foreign matter detector to stop working within a second preset time.
In a preferred embodiment of the above control method, the step of "controlling the operation direction of the outdoor fan and the operation state of the foreign matter detector based on the re-detected detection result" further includes: and if the foreign matters exist, controlling the outdoor fan to reversely rotate for a third preset time.
In a preferred technical solution of the above control method, before the step of "controlling the outdoor fan to reversely rotate for a third preset time", the control method further includes: acquiring the accumulated number of times of reverse rotation of the outdoor fan; judging whether the accumulated times exceed a first preset value or not; and selectively controlling the outdoor fan to reversely rotate for a third preset time or controlling the outdoor fan to normally rotate and simultaneously sending prompt information based on the judgment result.
In a preferred technical solution of the control method, the step of selectively controlling the outdoor fan to rotate reversely for a third preset time or controlling the outdoor fan to rotate normally while sending a prompt message based on the determination result and the detection result further includes: if the accumulated times exceed the first preset value, controlling the outdoor fan to rotate forwards continuously and sending prompt information; and if the accumulated times do not exceed the first preset value, controlling the outdoor fan to reversely rotate for the third preset time.
In a preferred technical solution of the above control method, after the step of "controlling the outdoor fan to reverse for the third preset time", the control method further includes: the step of "detecting again whether there is foreign matter on the surface of the outdoor heat exchanger by the foreign matter detector" is performed again.
In a preferred technical solution of the above control method, the air conditioner includes a display system, and the step of "sending out a prompt message" further includes: and controlling the display system to display prompt information.
In a preferred embodiment of the above control method, the step of "controlling the display system to display the prompt message" further includes: and controlling the display system to display prompt information of 'manual foreign matter cleaning'.
In a preferred embodiment of the control method, the step of "controlling the operation direction of the outdoor fan based on the detection result" further includes: and if no foreign matters exist, controlling the outdoor fan to rotate forwards, and waiting for the next time point to detect whether foreign matters exist on the surface of the outdoor heat exchanger again through the foreign matter detector.
In a preferred technical solution of the above control method, the foreign object detector is an infrared detector.
In the preferred technical scheme of the invention, the air conditioner comprises an outdoor unit, the outdoor unit comprises an outdoor fan and an outdoor heat exchanger, and heat exchange between a refrigerant and air in an outdoor environment can be realized through the outdoor fan and the outdoor heat exchanger, so that stable operation of the air conditioner is ensured. The outdoor unit is provided with a foreign matter detector at a position close to the outdoor heat exchanger, and the foreign matter detector is used for detecting whether foreign matters exist on the surface of the outdoor heat exchanger. Preferably, the foreign matter detector is an infrared detector, and whether foreign matters exist on the surface of the outdoor heat exchanger can be accurately detected through the infrared detector. The control method of the invention comprises the following steps: when the outdoor fan operates, whether foreign matters exist on the surface of the outdoor heat exchanger is detected through the foreign matter detector, and then the operation direction of the outdoor fan is controlled based on the detection result. Therefore, the running direction of the outdoor fan can be adjusted in real time according to whether foreign matters exist on the surface of the outdoor heat exchanger, if the foreign matters exist, the outdoor fan is controlled to rotate reversely, the foreign matters on the surface of the outdoor heat exchanger are blown away by airflow generated by the reverse rotation of the outdoor fan, and therefore the reduction of heat exchange efficiency caused by the attachment of the foreign matters on the surface of the outdoor heat exchanger can be avoided. The step of controlling the operation direction of the outdoor fan based on the detection result further includes: and if the foreign matters exist, controlling the outdoor fan to rotate reversely for a first preset time, detecting whether the foreign matters exist on the surface of the outdoor heat exchanger through the foreign matter detector again after controlling the outdoor fan to rotate reversely for the first preset time, and controlling the rotating speed of the outdoor fan and the working state of the foreign matter detector based on the detection result of the secondary detection.
By the control mode, when the outdoor fan runs, if the surface of the outdoor heat exchanger is detected to have foreign matters, the outdoor fan is controlled to rotate reversely, and the foreign matters attached to the surface of the outdoor heat exchanger are blown off by airflow generated by the reverse rotation of the outdoor fan. However, the time for reversing the outdoor fan cannot be too long, and at this time, the outdoor fan is controlled to reverse for only the first preset time, and if the time is too long, the outdoor fan may malfunction. The outdoor fan is controlled to rotate reversely for the first preset time, so that the fault caused by the fact that the outdoor fan rotates reversely for too long time can be avoided, and the stability of the air conditioner is improved. After the outdoor fan rotates reversely for the first preset time, the foreign matters attached to the surface of the outdoor heat exchanger may not be blown off or may be blown off, and at this time, the operation direction of the outdoor fan and the working state of the foreign matter detector need to be controlled according to the detection result of the re-detection, so that the foreign matters on the surface of the outdoor heat exchanger can be better removed, and the heat exchange efficiency of the outdoor heat exchanger is ensured.
Further, the step of controlling the operation direction of the outdoor fan and the operation state of the foreign matter detector based on the re-detected detection result further includes: and if no foreign matters exist, controlling the outdoor fan to rotate forwards, and controlling the foreign matter detector to stop working within a second preset time. After the outdoor fan rotates reversely for the first preset time, if the foreign matter detector detects that no foreign matter exists on the surface of the outdoor heat exchanger, the foreign matter originally attached to the surface of the outdoor heat exchanger is blown off, and at the moment, the outdoor fan is controlled to rotate normally, namely, the outdoor fan is controlled to operate normally. And meanwhile, the foreign matter detector is controlled to stop working within the second preset time, because if the foreign matter detector works continuously, the foreign matter detector detects that foreign matters exist on the surface of the outdoor heat exchanger within a short time, and if the outdoor fan is controlled to rotate reversely, the outdoor fan may possibly fail due to frequent reverse rotation. Through the control mode, the fault caused by frequent reversal of the outdoor fan can be avoided, and the stability of the air conditioner is improved.
Further, the step of controlling the operation direction of the outdoor fan and the operation state of the foreign matter detector based on the re-detected detection result further includes: and if the foreign matters exist, controlling the outdoor fan to reversely rotate for a third preset time. After the outdoor fan rotates reversely for the first preset time, if the foreign matter detector detects that the surface of the outdoor heat exchanger still has foreign matters, the foreign matters attached to the surface of the outdoor heat exchanger originally are still not blown off, at the moment, the outdoor fan is controlled to rotate reversely, and the foreign matters attached to the surface of the outdoor heat exchanger are blown off by wind generated by the outdoor fan rotating reversely. Similarly, the time for reversing the outdoor fan cannot be too long, at this time, the outdoor fan is controlled to reverse for only the third preset time, and if the time is too long, the outdoor fan may be failed, so that the failure of the outdoor fan due to the too long reverse time can be avoided by controlling the outdoor fan to reverse for the first preset time, and the stability of the air conditioner is improved.
Further, before the step of controlling the outdoor fan to reversely rotate for the third preset time, the control method of the invention further comprises the following steps: and acquiring the accumulated times of reverse rotation of the outdoor fan, judging whether the accumulated times exceeds a first preset value, and selectively controlling the outdoor fan to rotate reversely for a third preset time or controlling the outdoor fan to rotate forwardly and simultaneously sending prompt information based on the judgment result. If the number of times of reverse rotation of the outdoor fan in a short time is excessive, a malfunction of the outdoor fan may be caused. Therefore, before the outdoor fan is controlled to rotate reversely between the third preset values, the accumulated times of the outdoor fan reverse rotation before the third preset values are judged, the accumulated times are compared with the first preset values, and the running direction of the outdoor fan is controlled according to the comparison result, so that the foreign matters on the surface of the outdoor heat exchanger can be removed, and meanwhile, the stable running of the outdoor fan is ensured.
Further, if the accumulated number of times exceeds the first preset value, it indicates that the number of times of reverse rotation of the outdoor fan is too large, and if the outdoor fan continues to be controlled to reverse, the outdoor fan may malfunction. At the moment, the outdoor fan is controlled to rotate forwards continuously, and prompt information is sent out to remind a user of cleaning foreign matters. If the accumulated times do not exceed the first preset value, the times of the outdoor fan reversing are not too many, at the moment, the outdoor fan can be continuously controlled to reverse for a third preset time, and foreign matters on the surface of the outdoor heat exchanger are removed through the reversing of the outdoor fan. Through the control mode, the foreign matters on the surface of the outdoor heat exchanger can be removed, and meanwhile, the stable operation of the outdoor fan is ensured.
Further, after the step of controlling the outdoor fan to reversely rotate for a third preset time, the control method of the present invention further includes: the step of re-operating "detecting whether there is foreign matter on the surface of the outdoor heat exchanger again by the foreign matter detector". Through the control mode, whether foreign matters exist on the surface of the outdoor heat exchanger can be continuously detected through the foreign matter detector, the running direction of the outdoor fan and the working state of the foreign matter detector are controlled in real time according to the detection result, the foreign matters on the surface of the outdoor heat exchanger can be better removed, and the heat exchange efficiency of the outdoor heat exchanger is ensured.
Further, the air conditioner includes a display system, and the step of "sending out a prompt message" further includes: and controlling a display system to display prompt information. Preferably, the step of "controlling the display system to display the prompt message" includes: and controlling a display system to display prompt information of 'manually cleaning foreign matters'. Through such control mode, when the accumulative total number of times exceeds a first preset value, the control display system displays 'manual cleaning foreign matter' while controlling the outdoor fan to rotate positively, reminds a user to manually clean the foreign matter, ensures that the foreign matter attached to the surface of the outdoor heat exchanger can be effectively removed, and further ensures the heat exchange efficiency of the outdoor heat exchanger.
Further, the step of controlling the operation direction of the outdoor fan based on the detection result further includes: and if no foreign matters exist, controlling the outdoor fan to rotate forwards, and waiting for the next time point to detect whether foreign matters exist on the surface of the outdoor heat exchanger again through the foreign matter detector. Through such control mode, when not detecting the foreign matter, then control outdoor fan corotation, normal operating promptly, then wait to next time point and just detect the surface of outdoor heat exchanger again through the foreign matter detector and whether have the foreign matter, just so can also learn the surface of outdoor heat exchanger in real time whether have the foreign matter to can ensure the heat exchange efficiency of outdoor heat exchanger better.
Drawings
A control method of an air conditioner of the present invention is described below with reference to the accompanying drawings. In the drawings:
fig. 1 is a schematic view illustrating an outdoor unit of an air conditioner provided with a foreign object detector according to an embodiment of the present invention;
fig. 2 is a flowchart (one) of a control method of an air conditioner according to an embodiment of the present invention;
fig. 3 is a flowchart (ii) of a control method of an air conditioner according to an embodiment of the present invention;
fig. 4 is a flowchart (iii) of a control method of an air conditioner according to an embodiment of the present invention.
Reference numerals:
1. an outdoor unit; 11. an outdoor fan; 12. an outdoor heat exchanger; 2. a foreign matter detector.
Detailed Description
Preferred embodiments of the present invention are described below with reference to the accompanying drawings. 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.
It should be noted that the terms "first" and "second" in the description of the present invention are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Since the outdoor unit of the air conditioner is generally installed in an outdoor environment, foreign matters in the outdoor environment enter the outdoor unit of the air conditioner and are attached to the outdoor heat exchanger. The effective heat exchange area of the outdoor heat exchanger can be greatly reduced by the fact that a large number of foreign matters lean against the outdoor heat exchanger, so that the refrigerating/heating performance of the air conditioner is reduced, and the use experience of a user is reduced. Therefore, the foreign matter detector is arranged on the outdoor unit of the air conditioner, so that whether foreign matters exist on the surface of the outdoor heat exchanger or not can be known in real time, the running direction of the outdoor fan is controlled according to the detection result of the foreign matter detector, when the foreign matters exist, the outdoor fan is controlled to rotate reversely, the foreign matters can be blown away, and the reduction of the heat exchange efficiency of the outdoor heat exchanger caused by the fact that the foreign matters are attached to the surface of the outdoor heat exchanger can be effectively avoided.
First, a possible installation manner of the foreign object detector of the present invention on the outdoor unit will be described with reference to fig. 1. Fig. 1 is a schematic view illustrating an outdoor unit of an air conditioner provided with a foreign object detector according to an embodiment of the present invention.
As shown in fig. 1 and according to the orientation shown in fig. 1, the air conditioner includes an outdoor unit 1, the outdoor unit 1 includes an outdoor fan 11 and an outdoor heat exchanger 12, the outdoor fan 11 can be operated in a forward or reverse direction, the direction of the air flow generated by the forward rotation of the outdoor fan 11 is from left to right, and the direction of the air flow generated by the reverse rotation of the outdoor fan 11 is from right to left. When the outdoor unit 1 normally operates, the operation direction of the outdoor fan 11 is forward rotation, and when the outdoor fan 11 operates and generates an air flow which flows through the outdoor heat exchanger 12, the air flow exchanges heat with the refrigerant in the outdoor heat exchanger 12, so that the heat exchange between the refrigerant and the air in the outdoor environment can be realized through the outdoor fan 11 and the outdoor heat exchanger 12, and the stable operation of the air conditioner is ensured.
The outdoor unit 1 is provided with the foreign matter detector 2 on the outdoor heat exchanger 12, and if the foreign matter detector 2 is an infrared detector, the infrared detector includes an infrared transmitter and an infrared receiver, the infrared transmitter and the infrared receiver are relatively disposed on the upper side and the lower side of the outdoor heat exchanger 12, and when no foreign matter is attached to the outdoor heat exchanger 12, the infrared receiver can receive the infrared ray emitted by the infrared transmitter. If foreign matter is attached to the outdoor heat exchanger 12 and blocks infrared rays, the infrared receiver cannot receive infrared rays emitted from the infrared emitter. That is, if the infrared receiver can receive the infrared ray emitted from the infrared emitter, it indicates that there is no foreign object on the outdoor heat exchanger 12, and if the infrared receiver cannot receive the infrared ray emitted from the infrared emitter, it indicates that there is a foreign object on the outdoor heat exchanger 12. In this way, the foreign matter detector 2 can detect whether or not foreign matter is present on the surface of the outdoor heat exchanger 12.
Obviously, the foreign object detector 2 may also be a pressure sensor disposed on the surface of the outdoor heat exchanger 12, for example, the pressure sensor includes a metal strain gauge disposed in a bridge circuit, and when the metal strain gauge receives a pressure, its resistance value changes, and the voltage across it also changes, so that whether there is a foreign object on the surface of the outdoor heat exchanger 12 can be determined by the change of the voltage output by it. Of course, the foreign object detector 2 may be other types of detectors, and those skilled in the art may select the type of detector flexibly as long as the detector can detect whether there is a foreign object on the surface of the outdoor heat exchanger 12.
Obviously, the foreign object detector 2 may also be an image pickup device, such as a camera, etc., by which an image of the surface of the outdoor heat exchanger 12 is acquired, and then whether there is a foreign object on the surface of the outdoor heat exchanger 12 is determined by an image analysis method.
Of course, a person skilled in the art can flexibly select a specific arrangement form of the foreign object detector 2 according to a specific application scenario as long as the person can detect whether there is a foreign object on the surface of the outdoor heat exchanger 12.
It should be noted that the foreign object detector 2 may also be a temperature sensor, and the temperature sensor may detect the temperature of the external coil of the outdoor heat exchanger, and if the temperature of the external coil detected by the temperature sensor rises, it indicates that the external coil is blocked by the foreign object, so that the heat exchange efficiency of the outdoor heat exchanger is also deteriorated.
Obviously, the foreign object detector 2 may be disposed at other positions of the outdoor heat exchanger 12, or at other positions of the outdoor unit 1 close to the outdoor heat exchanger 12, and those skilled in the art can flexibly select the position of the foreign object detector 2 according to the specific application, as long as whether there is a foreign object on the surface of the outdoor heat exchanger 12 can be detected.
A possible implementation of the control method of the air conditioner of the present invention is explained with reference to fig. 2 to 4 as follows. Fig. 2 is a flowchart (i) of a control method of an air conditioner according to an embodiment of the present invention, fig. 3 is a flowchart (ii) of a control method of an air conditioner according to an embodiment of the present invention, and fig. 4 is a flowchart (iii) of a control method of an air conditioner according to an embodiment of the present invention.
As shown in fig. 2, in one possible embodiment, the control method of the present invention includes:
step S100: detecting whether foreign matters exist on the surface of the outdoor heat exchanger through a foreign matter detector;
step S200: if foreign matters exist, controlling the outdoor fan to rotate reversely for a first preset time;
in step S200, according to the detection result in step S100, if there is a foreign object on the surface of the outdoor heat exchanger, the outdoor fan is controlled to rotate reversely, and the foreign object on the surface of the outdoor heat exchanger is blown away by the airflow generated by the reverse rotation of the outdoor fan, so that the reduction of heat exchange efficiency caused by the attachment of the foreign object on the surface of the outdoor heat exchanger can be avoided. However, the time for reversing the outdoor fan cannot be too long, and at this time, the outdoor fan is controlled to reverse for only the first preset time, and if the time is too long, the outdoor fan may malfunction. If the first preset time is 30 seconds, namely, after the foreign matters on the surface of the outdoor heat exchanger are detected, the outdoor fan is controlled to rotate reversely for 30 seconds. The outdoor fan is controlled to rotate reversely for the first preset time, so that the fault caused by the fact that the outdoor fan rotates reversely for too long time can be avoided, and the stability of the air conditioner is improved.
Obviously, the 30 seconds is only an exemplary description of the first preset time, and the first preset time may also be 60 seconds or other time, and the field may flexibly select according to the specific type of the outdoor fan, the working scene of the outdoor fan, and other factors.
Step S300: after controlling the outdoor fan to rotate reversely for a first preset time, detecting whether foreign matters exist on the surface of the outdoor heat exchanger through the foreign matter detector again;
step S400: and controlling the running direction of the outdoor fan and the working state of the foreign matter detector based on the detection result of the second detection.
After the outdoor fan rotates reversely for the first preset time, if the first preset time is 30 seconds, the foreign matters attached to the surface of the outdoor heat exchanger may not be blown off or may be blown off, and at this time, whether the foreign matters exist on the surface of the outdoor heat exchanger is detected again by the foreign matter detector, that is, step S300 is performed. Then, the operation direction of the outdoor fan and the working state of the foreign matter detector are controlled according to the detection result of the second detection, that is, step S400 is executed, so that the foreign matter on the surface of the outdoor heat exchanger can be better removed, and the heat exchange efficiency of the outdoor heat exchanger is ensured.
As shown in fig. 3, in one possible embodiment, the control method of the present invention includes:
step S100: detecting whether foreign matters exist on the surface of the outdoor heat exchanger through a foreign matter detector;
step S200: if foreign matters exist, controlling the outdoor fan to rotate reversely for a first preset time;
step S300: after controlling the outdoor fan to rotate reversely for a first preset time, detecting whether foreign matters exist on the surface of the outdoor heat exchanger through the foreign matter detector again;
step S401: if no foreign matter exists, the outdoor fan is controlled to rotate forwards, and meanwhile the foreign matter detector is controlled to stop working within a second preset time;
step S402: if foreign matters exist, acquiring the accumulated number of times of reverse rotation of the outdoor fan;
based on the detection result again detected by the foreign object detector in step S300, if there is no foreign object, it indicates that the foreign object originally attached to the surface of the outdoor heat exchanger has been blown away, at this time, the outdoor fan is controlled to rotate forward, that is, the outdoor fan is controlled to operate normally, and meanwhile, the foreign object detector is controlled to stop working within a second preset time, that is, step S401 is executed. This is because if the foreign matter detector continues to operate, and the presence of foreign matter on the surface of the outdoor heat exchanger is detected again in a short time, if the outdoor fan is controlled to reverse again, the outdoor fan may malfunction due to frequent reverse rotation. If the second preset time is 30 minutes, namely after the surface of the outdoor heat exchanger is detected to have the foreign matters, the outdoor fan is controlled to rotate reversely for the first preset time, whether the surface of the outdoor heat exchanger has the foreign matters or not is detected again, if the surface of the outdoor heat exchanger is detected to have no foreign matters, the outdoor fan is controlled to rotate forwards, the foreign matter detector is stopped within 30 minutes, and whether the surface of the outdoor heat exchanger has the foreign matters or not is not detected any more. Through the control mode, the fault caused by frequent reversal of the outdoor fan can be avoided, and the stability of the air conditioner is improved.
Obviously, the 30 minutes is only an exemplary description of the second preset time, and the second preset time may also be 15 minutes or other time, and the field may flexibly select according to a specific application scenario.
If there is a foreign object, it indicates that the foreign object originally attached to the surface of the outdoor heat exchanger is not blown away, and at this time, the cumulative number of times of the outdoor fan reversing is obtained, that is, step S402 is executed. This is because if the number of times of reverse rotation of the outdoor fan in a short time is excessive, a malfunction of the outdoor fan may be caused.
Obviously, in step S402, if a foreign object is detected on the surface of the outdoor heat exchanger, the accumulated number of times of reverse rotation of the outdoor fan may not be obtained, and on the premise that it is ensured that the outdoor fan does not malfunction, the outdoor fan may be directly controlled to reverse for a third preset time, that is, step S405 is executed.
Step S403: judging whether the accumulated times exceed a first preset value, if so, executing a step S404; if not, go to step S405;
step S404: controlling the outdoor fan to rotate forwards and sending prompt information at the same time;
step S405: and controlling the outdoor fan to reversely rotate for a third preset time, and returning to execute the step S300.
In step S403, based on the accumulated number of outdoor fan inversions obtained in step S402, the accumulated number is compared with a first preset value, if the accumulated number exceeds the first preset value, for example, the first preset value is 3 times, and the accumulated number is 4 times, it indicates that the number of outdoor fan inversions is too large, and if the outdoor fan is continuously controlled to invert, it may cause an outdoor fan failure. At this time, the outdoor fan is controlled to rotate forwards continuously, and prompt information is sent out, that is, step S404 is executed to remind the user to clean foreign matters.
Obviously, the above 3 times are only one exemplary description of the specific value of the first preset value, and a person skilled in the art may flexibly select the specific value of the first preset value according to a specific application scenario, as long as the foreign matter removal and the failure of the outdoor fan due to frequent reversal can be both considered.
Obviously, when the accumulated times exceed the first preset value, the outdoor fan can be controlled to rotate forwards only without sending prompt information, the outdoor fan can be controlled to rotate backwards after the outdoor fan rotates forwards for a period of time, such as 30 minutes, and foreign matters on the outdoor heat exchanger are blown away by airflow generated by the outdoor fan rotating backwards.
The air conditioner comprises a display system, and the display system can send out prompt information through a display screen on an indoor unit of the air conditioner or a remote controller, a mobile phone and other mobile terminals. Specifically, the user can be reminded through modes such as voice, characters and the like, and the prompt message can be prompt message of 'manual cleaning of foreign matter', so that the user is reminded of timely manual cleaning of the foreign matter, the foreign matter attached to the surface of the outdoor heat exchanger can be effectively removed, and the heat exchange efficiency of the outdoor heat exchanger is further ensured.
Obviously, the content of the prompt message may also be "there is a foreign object" or "clean the surface of the outdoor heat exchanger", and the like, and those skilled in the art may flexibly select the content according to a specific application scenario.
If the accumulated times do not exceed the first preset value, if the first preset value is 3 times, the accumulated times are 2 times, the number of times of the outdoor fan reverse rotation is not large, and at the moment, the foreign matter detector detects that the surface of the outdoor heat exchanger still has foreign matters, and the foreign matters originally attached to the surface of the outdoor heat exchanger are not blown off. At this time, the outdoor fan is controlled to rotate reversely for a third preset time, that is, step S405 is executed, and the airflow generated by the reverse rotation of the outdoor fan is continued to blow away the foreign matters on the surface of the outdoor heat exchanger. Similarly, the time for reversing the outdoor fan cannot be too long, and at this time, the outdoor fan is controlled to reverse for only the third preset time, for example, the third preset time is 30 seconds, and if it is too long, the outdoor fan may be caused to malfunction. The outdoor fan is controlled to rotate reversely for the third preset time, so that the fault caused by the fact that the outdoor fan rotates reversely for too long time can be avoided, and the stability of the air conditioner is improved.
Obviously, the 30 seconds is only an exemplary description of the third preset time, and the third preset time may also be 60 seconds or other time duration, which can be flexibly selected by the field according to a specific application scenario.
Through the control mode, the foreign matters on the surface of the outdoor heat exchanger can be removed, and meanwhile, the stable operation of the outdoor fan is ensured.
After step S405 is performed, whether foreign objects exist on the surface of the outdoor heat exchanger is detected again by the foreign object detector, that is, the process returns to step S300, and if there is no foreign object, step S401 is performed, and if there is foreign object, step S402 is performed. By the control mode, whether foreign matters exist on the surface of the outdoor heat exchanger can be monitored in real time, and if foreign matters exist, the foreign matters on the surface of the outdoor heat exchanger can be removed in time, so that the heat exchange efficiency of the outdoor heat exchanger is ensured.
As shown in fig. 4, in one possible embodiment, the control method of the present invention includes:
step S100: detecting whether foreign matters exist on the surface of the outdoor heat exchanger through a foreign matter detector;
step S500: and if no foreign matters exist, controlling the outdoor fan to rotate forwards, and waiting for the next time point to detect whether foreign matters exist on the surface of the outdoor heat exchanger again through the foreign matter detector.
In step S500, based on the detection result in step S100, if no foreign matter is detected, the outdoor fan is controlled to rotate forward, i.e., to operate normally, and then the foreign matter detector is used to detect whether foreign matter is on the surface of the outdoor heat exchanger again when the next time point is reached, if the foreign matter detector is used to detect whether foreign matter is on the surface of the outdoor heat exchanger again after the outdoor fan is controlled to rotate forward for 10 minutes, whether foreign matter is on the surface of the outdoor heat exchanger can be known in time, so that the heat exchange efficiency of the outdoor heat exchanger can be better ensured.
Obviously, the above 10 minutes is only an exemplary description of the next time point, and when no foreign object is detected, a person skilled in the art can flexibly select the working interval time of the foreign object detector according to a specific application scenario as long as it can know whether the surface of the outdoor heat exchanger has the foreign object in time.
It should be noted that the duration of each time the foreign object detector works may be selected according to a specific type, a working principle, and a specific application scenario of the foreign object detector, for example, the duration of each time the foreign object detector works for 5 seconds, and the embodiment is not limited.
Although the foregoing embodiments describe the steps in the above sequential order, those skilled in the art will understand that, in order to achieve the effect of the present embodiments, the steps may not be executed in such an order, and may be executed simultaneously (in parallel) or in an inverse order, and these simple variations are within the scope of the present invention.
In summary, in a preferred embodiment of the present invention, the detection result of whether there is a foreign object on the surface of the outdoor heat exchanger is detected by the foreign object detector, and if there is a foreign object, the outdoor fan is controlled to rotate reversely for a first preset time, and the foreign object attached to the surface of the outdoor heat exchanger is blown away by the airflow generated by the reverse rotation of the outdoor fan. After controlling the outdoor fan to rotate reversely for a first preset time, detecting whether foreign matters exist on the surface of the outdoor heat exchanger through the foreign matter detector again, if no foreign matters exist, controlling the outdoor fan to rotate normally, and controlling the foreign matter detector to stop working at a second preset time; and if the foreign matters exist, acquiring the accumulated number of times of the reverse rotation of the outdoor fan. If the accumulated times exceed a first preset value, controlling the outdoor fan to rotate forwards continuously and sending prompt information to remind a user of manually cleaning foreign matters on the surface of the outdoor heat exchanger; and if the accumulated times do not exceed the first preset value, controlling the outdoor fan to reversely rotate for a third preset time, and further blowing off foreign matters attached to the surface of the outdoor heat exchanger through airflow generated by the reverse rotation of the outdoor fan. Through the control mode, foreign matters on the surface of the outdoor heat exchanger can be better removed, the heat exchange efficiency of the outdoor heat exchanger is ensured, the problem that the outdoor fan continuously rotates reversely to cause faults can be avoided, and the stable operation of the outdoor fan is ensured.
Of course, the above alternative embodiments, and the alternative embodiments and the preferred embodiments can also be used in a cross-matching manner, so that a new embodiment is combined to be suitable for a more specific application scenario.
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 (10)
1. The control method of the air conditioner is characterized in that the air conditioner comprises an outdoor unit, the outdoor unit comprises an outdoor fan and an outdoor heat exchanger, a foreign matter detector is arranged at a position close to the outdoor heat exchanger, and the foreign matter detector is used for detecting whether foreign matters exist on the surface of the outdoor heat exchanger;
the control method comprises the following steps:
when the outdoor fan runs, detecting whether foreign matters exist on the surface of the outdoor heat exchanger through the foreign matter detector;
controlling an operation direction of the outdoor fan based on the detection result;
the step of controlling the operation direction of the outdoor fan based on the detection result further includes:
if foreign matters exist, controlling the outdoor fan to rotate reversely for a first preset time;
after the outdoor fan is controlled to rotate reversely for a first preset time, detecting whether foreign matters exist on the surface of the outdoor heat exchanger through the foreign matter detector again;
and controlling the operation direction of the outdoor fan and the working state of the foreign matter detector based on the re-detected detection result.
2. The control method according to claim 1, wherein the step of controlling the operation direction of the outdoor fan and the operation state of the foreign matter detector based on the re-detected detection result further comprises:
and if no foreign matters exist, controlling the outdoor fan to rotate forwards, and controlling the foreign matter detector to stop working within a second preset time.
3. The control method according to claim 1, wherein the step of controlling the operation direction of the outdoor fan and the operation state of the foreign matter detector based on the re-detected detection result further comprises:
and if the foreign matters exist, controlling the outdoor fan to reversely rotate for a third preset time.
4. The control method according to claim 3, wherein before the step of controlling the outdoor fan to reversely rotate for a third preset time, the control method further comprises:
acquiring the accumulated number of times of reverse rotation of the outdoor fan;
judging whether the accumulated times exceed a first preset value or not;
and selectively controlling the outdoor fan to reversely rotate for a third preset time or controlling the outdoor fan to normally rotate and simultaneously sending prompt information based on the judgment result.
5. The control method according to claim 4, wherein the step of selectively controlling the outdoor fan to rotate reversely for a third preset time or controlling the outdoor fan to rotate forward while sending the prompt message based on the determination result and the detection result further comprises:
if the accumulated times exceed the first preset value, controlling the outdoor fan to rotate forwards continuously and sending prompt information;
and if the accumulated times do not exceed the first preset value, controlling the outdoor fan to reversely rotate for the third preset time.
6. The control method according to claim 5, wherein after the step of controlling the outdoor fan to reverse for the third preset time, the control method further comprises:
the step of "detecting again whether there is foreign matter on the surface of the outdoor heat exchanger by the foreign matter detector" is performed again.
7. The control method of claim 5, wherein the air conditioner includes a display system, and the step of "issuing a prompt message" further comprises:
and controlling the display system to display prompt information.
8. The control method according to claim 7, wherein the step of controlling the display system to display the prompt message further comprises:
and controlling the display system to display prompt information of 'manual foreign matter cleaning'.
9. The control method according to claim 1, wherein the step of controlling the operation direction of the outdoor fan based on the detection result further comprises:
and if no foreign matters exist, controlling the outdoor fan to rotate forwards, and waiting for the next time point to detect whether foreign matters exist on the surface of the outdoor heat exchanger again through the foreign matter detector.
10. The control method according to claim 1, wherein the foreign object detector is an infrared detector.
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