CN110513826B - Air conditioner and control method thereof - Google Patents
Air conditioner and control method thereof Download PDFInfo
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- CN110513826B CN110513826B CN201910854316.XA CN201910854316A CN110513826B CN 110513826 B CN110513826 B CN 110513826B CN 201910854316 A CN201910854316 A CN 201910854316A CN 110513826 B CN110513826 B CN 110513826B
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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
- F24F11/32—Responding to malfunctions or emergencies
- F24F11/38—Failure diagnosis
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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
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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
- F24F11/88—Electrical aspects, e.g. circuits
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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
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
- F25B49/022—Compressor control arrangements
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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
- F25B2500/00—Problems to be solved
- F25B2500/28—Means for preventing liquid refrigerant entering into the compressor
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Abstract
本发明涉及空调技术领域，公开了一种空调器及其控制方法。空调器的控制方法包括：判断内风机是否出现第一异常；当内风机出现第一异常时，暂时关闭压缩机；在暂时关闭压缩机之后，判断内风机是否发生故障；若判定内风机发生故障，则控制压缩机保持关闭；若判定内风机未发生故障，则控制压缩机重新启动。使其在内风机可能存在隐患的第一时间就停止运行，这样可以防止压缩机液击及压缩机排气压力不断升高，避免对压缩机造成损坏。压缩机暂时关闭之后确认了内风机发生故障则保持压缩机关闭，如果排除内风机存在故障，那么重启压缩机，空调器正常运作。本发明的空调器能够实现上述的控制方法，因此也能够在内风机存在故障时，较好地保护压缩机。
The invention relates to the technical field of air conditioners, and discloses an air conditioner and a control method thereof. The control method of the air conditioner includes: judging whether the internal fan has a first abnormality; when the internal fan has the first abnormality, temporarily turning off the compressor; after temporarily turning off the compressor, judging whether the internal fan is faulty; if it is determined that the internal fan is faulty , the compressor is controlled to keep off; if it is determined that the internal fan is not faulty, the compressor is controlled to restart. It can stop the operation of the internal fan at the first time when there may be hidden dangers, which can prevent the compressor from liquid hammer and the continuous increase of the compressor discharge pressure, and avoid damage to the compressor. After the compressor is temporarily turned off, it is confirmed that the internal fan is faulty and the compressor is kept off. If the fault of the internal fan is excluded, the compressor is restarted and the air conditioner operates normally. The air conditioner of the present invention can implement the above-mentioned control method, and therefore can also better protect the compressor when the internal fan is faulty.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to an air conditioner and a control method thereof.
Background
The main components of a general air conditioner include a compressor, a condenser, an outer fan, an evaporator, and an inner fan. When the inner fan breaks down, the exhaust pressure of the compressor is easily overhigh, and liquid impact phenomenon can be generated during refrigeration. These phenomena tend to damage the air conditioner compressor, resulting in a shortened service life thereof. However, in the prior art, when the inner fan has a fault hidden trouble, the compressor cannot be protected in time.
Disclosure of Invention
The invention solves the problem of how to protect the compressor in time when the inner fan has a fault hidden trouble.
In order to solve the above problem, in a first aspect, the present invention provides a method for controlling an air conditioner, the air conditioner including an internal fan and a compressor, the method comprising:
judging whether the inner fan has a first abnormality or not;
when the first abnormality occurs to the inner fan, the compressor is temporarily closed;
after the compressor is temporarily closed, judging whether the inner fan has a fault;
if the inner fan is judged to be in fault, controlling the compressor to be kept closed; and if the inner fan is judged not to have a fault, controlling the compressor to restart.
The scheme has the advantages that when the first abnormity is judged, but the inner fan is not determined to be in fault, the compressor is temporarily closed firstly, so that the compressor stops running at the first time when the fan possibly has fault hidden danger, the liquid impact of the compressor and the continuous rising of the exhaust pressure of the compressor can be prevented, and the compressor is prevented from being damaged. After the compressor is temporarily closed, if the inner fan is determined to have a fault, the compressor is kept closed, so that the compressor or other air-conditioning components are prevented from being damaged; if the fault of the inner fan is eliminated, the compressor is restarted, and the air conditioner operates normally.
In an embodiment of the present invention, the step of determining whether the first abnormality occurs in the inner fan specifically includes: in a first preset time after starting up, if a pulse signal fed back by the inner fan is not received or the rotating speed of the inner fan is continuously less than a first preset rotating speed, judging that the inner fan has a first abnormity, otherwise, judging that the inner fan has no first abnormity.
In this solution, the reason that can cause the system pressure to be too high may be the internal fan is stopped or the rotation speed is too low. And the starting stage is most easy to occur and detect the abnormal operation of the fan. Therefore, the first abnormality may be that, within a first preset time after the start-up, if a pulse signal fed back by the inner fan is not received or the rotating speed of the inner fan is continuously less than a first preset rotating speed. By the method, whether the inner fan is abnormal or not, which easily causes high pressure, can be accurately and quickly judged.
In one embodiment of the present invention, the first predetermined time is 45-60 s.
Further, the first preset rotating speed is 80-150 rpm.
In the scheme, proper parameters are selected, so that whether the inner fan is abnormal or not can be judged accurately. If the first preset time is too long, the judgment time is too long, the compressor is easy to continuously work for too long time under the condition that the inner fan runs abnormally, and the compressor is undoubtedly not favorable. However, if the first preset time is too short, it is difficult to ensure the accuracy of the judgment. The first preset rotating speed is set to be 80-150rpm, because if the first preset rotating speed is set to be higher, the higher rotating speed is not easy to reach after the inner fan is started, and the condition of misjudgment is easy to occur; if the setting is low, the abnormal operation of the inner fan can be missed.
In an embodiment of the present invention, after the compressor is temporarily turned off, the step of determining whether the inner fan fails specifically includes:
stopping power supply to the inner fan after temporarily turning off the compressor;
after the second preset time passes since the power supply to the inner fan is stopped, supplying power to the inner fan again;
after the inner fan is powered on again, judging whether a second abnormity occurs in the inner fan;
if the second abnormity occurs in the inner fan, the inner fan is judged to be in fault, otherwise, the inner fan is judged not to be in fault.
In this embodiment, after the compressor is temporarily turned off due to the first abnormality, it is possible to confirm whether or not the inner fan has a failure. The method for confirming the abnormal condition of the inner fan comprises the steps of shutting down the inner fan for a second preset time, then supplying power again, and judging whether the inner fan is abnormal for a second time after the inner fan is powered on. The second preset time for suspending the inner fan is favorable for ensuring the accuracy of subsequent judgment.
In one embodiment of the invention, the second predetermined time is 10-60 s. During the pause of tens of seconds, the inner fan may eliminate the interference of the previous detection on the subsequent detection or eliminate other adverse factors on the operation of the fan.
In an embodiment of the present invention, after the internal air blower is powered on again, the step of determining whether the second abnormality occurs in the internal air blower specifically includes:
and under the condition that the inner fan is powered on again, in a third preset time, if the pulse signal fed back by the inner fan is not received or the rotating speed of the inner fan is continuously less than a second preset rotating speed, judging that the inner fan has second abnormity, otherwise, judging that the inner fan has no second abnormity.
In one embodiment of the present invention, the third predetermined time is 20-100 s.
In one embodiment of the invention, the second predetermined speed is 80-150 rpm.
In the scheme, whether the second abnormity occurs in the inner fan is judged, and whether the first abnormity occurs is similar to the judgment. And when the inner fan is powered on again, whether the inner fan has second abnormity is determined by detecting the pulse signal or the rotating speed. Specifically, the time for determining whether the second abnormality occurs, that is, the third preset time, may be shorter or longer than the first preset time, and at this time, the compressor is not operated, so that there is no risk of the system pressure being too high.
In one embodiment of the present invention, the control method of an air conditioner further includes: and if the inner fan is judged to be in fault, outputting prompt information of the fault of the inner fan and controlling the air conditioner to stop running.
In the scheme, when the inner fan is judged to be in fault, the prompt information related to the fault is reported, the air conditioner is stopped to operate so as to protect other components, and meanwhile, energy consumption is saved.
In a second aspect, an embodiment of the present invention provides an air conditioner, including an internal fan, a compressor, and a controller, where the controller is configured to:
judging whether the inner fan has a first abnormality or not;
when the first abnormality occurs to the inner fan, the compressor is temporarily closed;
after the compressor is temporarily closed, judging whether the inner fan has a fault;
if the inner fan is judged to be in fault, controlling the compressor to be kept closed; and if the inner fan is judged not to have a fault, controlling the compressor to restart.
The air conditioner of the scheme can be used for realizing the control method provided by the first aspect, so that the compressor can be protected in time when the inner fan has a fault hidden trouble.
Drawings
Fig. 1 is a schematic structural diagram of an air conditioner according to an embodiment of the present invention;
fig. 2 is a block diagram of an air conditioner according to an embodiment of the present invention;
FIG. 3 is a flowchart illustrating a method for controlling an air conditioner according to an embodiment of the present invention;
FIG. 4 is a flow chart illustrating the determination of whether the inner fan has failed after the compressor is temporarily turned off in accordance with one embodiment of the present invention;
FIG. 5 is a schematic diagram of the control logic of an air conditioner according to an embodiment of the present invention.
Description of reference numerals:
100-an air conditioner; 110-inner coil pipe; 120-an inner fan; 130-an outer coil; 140-an outer fan; 150-a compressor; 160-rotation speed sensor; 170-controller.
Detailed Description
The main parts of a common air conditioner comprise a compressor, a condenser, an outer fan, an evaporator and an inner fan, and when the inner fan breaks down, for example, the fan is disconnected, the fan is not firmly inserted, a motor is damaged, foreign matters exist in the fan, and the like, the inner fan cannot normally operate. When the inner fan fails to operate normally, if a user starts the heating mode of the air conditioner, the compressor and the outer fan operate normally while the inner fan does not operate, so that the pressure and the exhaust of the air conditioning system are increased continuously. If the inner fan can not normally operate under severe working conditions in the experimental test process, after the compressor operates for about 2min, the high pressure of the air conditioning system can reach 4.1Mpa, the maximum pressure allowed by the compressor can be reached, the potential safety hazard of the operation of the air conditioner is large, and meanwhile, certain damage can be easily caused to components such as the system compressor, and the service life of the air conditioner is shortened. If a user starts a refrigeration mode, when an inner fan fails, liquid refrigerant in an inner machine of the evaporator cannot be normally evaporated and returns to the compressor, so that liquid impact of the compressor and continuous increase of the exhaust pressure of the compressor are caused, and the compressor is greatly damaged.
In order to solve the above problems, embodiments of the present invention provide an air conditioner and a control method thereof. In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
Fig. 1 is a schematic structural diagram of an air conditioner 100 according to an embodiment of the present invention; fig. 2 is a block diagram of an air conditioner 100 according to an embodiment of the present invention. As shown in fig. 1 and 2, an air conditioner 100 according to an embodiment of the present invention includes an inner coil 110, an outer coil 130, an inner fan 120, an outer fan 140, a compressor 150, and a controller 170, wherein the inner coil 110 and the outer coil 130 can be used as an evaporator and a condenser, respectively, under different operating conditions. Normally, the outer coil 130, the outer fan 140 and the compressor 150 are assembled in an outer casing and placed outdoors; the inner coil 110 and the inner fan 120 are assembled in the inner casing and placed indoors. The inner coil 110, the outer coil 130, and the compressor 150 are connected by pipes to form a circuit for circulating the refrigerant. The compressor 150, the inner fan 120, and the outer fan 140 are all electrically connected to a controller 170 to enable controlled turning on, turning off, and adjustment of operating parameters.
Further, the air conditioner 100 further includes a rotation speed sensor 160 for detecting a rotation speed of the inner fan 120. The rotation speed sensor 160 is electrically connected to the controller 170, and the collected rotation speed of the inner fan 120 can be transmitted to the controller 170 in real time, so that the controller 170 monitors the rotation speed of the inner fan 120. In addition, the inner fan 120 can feed back a pulse signal to the controller 170 during normal operation.
In this embodiment, the controller 170 is configured to: judging whether the inner fan 120 has a first abnormality; temporarily turning off the compressor 150 when the first abnormality occurs in the inner fan 120; after temporarily shutting down the compressor 150, determining whether the inner fan 120 is malfunctioning; if the inner fan 120 is determined to be in fault, controlling the compressor 150 to be kept closed; and if the inner fan 120 is determined not to be in fault, controlling the compressor 150 to restart.
When the first abnormality is determined, the compressor 150 is temporarily turned off, and then it is further determined whether the inner fan 120 is out of order. Therefore, the operation is stopped at the first time when the hidden trouble exists in the inner fan 120, and the liquid refrigerant in the inner machine of the evaporator can be prevented from returning to the compressor 150 after being normally evaporated, so that the liquid impact of the compressor 150 and the continuous increase of the exhaust pressure of the compressor 150 can be prevented, and the damage to the compressor 150 can be prevented. After the compressor 150 is temporarily shut down, if the inner fan 120 is determined to be out of order, the compressor 150 is kept shut down, so that the compressor 150 or other air conditioning components are prevented from being damaged; if the inner fan 120 is removed from the fault, the compressor 150 is restarted and the air conditioner 100 can be restored to normal operation.
Fig. 3 is a flowchart illustrating a method for controlling an air conditioner according to an embodiment of the present invention. Referring to fig. 3, the method is suitable for the air conditioner 100 according to the embodiment of the present invention. The control method of the air conditioner comprises the following steps:
and S100, judging whether the inner fan has a first abnormity.
Taking the air conditioner 100 according to the embodiment of the present invention as an example, the controller 170 comprehensively determines whether the first abnormality occurs in the inner fan 120 according to the pulse signal fed back by the inner fan 120 and the rotation speed information of the inner fan 120 fed back by the rotation speed sensor 160. Specifically, within a first preset time after the internal fan 120 is turned on, if the pulse signal fed back by the internal fan 120 is not received or the rotating speed of the internal fan 120 is continuously less than a first preset rotating speed, the controller 170 determines that the internal fan 120 is in a first abnormal state. If the controller 170 receives the pulse signal fed back by the inner fan 120 and the rotating speed of the inner fan 120 reaches the first preset rotating speed, it is determined that the first abnormality does not occur in the inner fan 120.
Specifically, in order to avoid the missed judgment or the erroneous judgment of the abnormal operation of the internal fan 120 by the controller 170, the first preset time is 45 to 60 seconds, and the first preset rotating speed is 80 to 150 rpm. Preferably, the first preset time is 50s, and the first preset rotating speed is 100 rpm. By selecting appropriate parameters, it is beneficial to accurately judge whether the inner fan 120 is abnormal. If the first preset time is set to be too long, which results in too long judgment time, the compressor 150 is likely to operate for too long under the condition that the inner fan 120 is abnormally operated, which is certainly disadvantageous to the compressor 150. However, if the first preset time is too short, it is difficult to ensure the accuracy of the judgment. If the first preset rotation speed is set to be higher (for example, 400rpm), after the inner fan 120 is started, the higher rotation speed is not easily reached, and at this time, even if the inner fan 120 is normal, it is easily determined that the first abnormality occurs. If the first preset rotational speed setting is low, the operation abnormality of the inner fan 120 may be missed. Of course, in other embodiments of the present invention, the first preset time and the first preset rotation speed may be adjusted according to actual conditions, and are not limited to the ranges provided in this embodiment.
And step S200, when the first abnormality occurs to the inner fan, temporarily closing the compressor.
Taking the air conditioner 100 provided by the embodiment of the present invention as an example, when the controller 170 determines that the first abnormality occurs in the inner fan 120, the compressor 150 is controlled to temporarily stop operating.
And step S300, after the compressor is temporarily closed, judging whether the inner fan has a fault.
Taking the air conditioner 100 provided in the embodiment of the present invention as an example, after the compressor 150 is temporarily turned off, the controller 170 determines whether the inner fan 120 has a failure. When it is determined that the first abnormality occurs in the inner fan 120 in step S100, it may be considered that the inner fan 120 has a potential fault, and step S300 is used to determine whether the fan has a fault. Specifically, the operation condition of the inner fan 120 may be continuously monitored, such as the feedback condition of the pulse signal, the rotation speed condition, and the like, to determine whether the inner fan 120 fails. The specific manner may be similar to the manner of determining whether the first abnormality occurs in the inner fan 120 in step S100, and related parameters may also be adjusted.
Step S400, if the inner fan is judged to be in fault, controlling the compressor to be kept closed; and if the inner fan is judged not to have a fault, controlling the compressor to restart.
Taking the air conditioner 100 provided in the embodiment of the present invention as an example, after determining that the inner fan 120 has a fault, and at this time, it is basically determined that the fault exists and is not eliminated, the controller 170 keeps the compressor 150 off. If it is determined that the inner fan 120 is not in failure, the previous first abnormality may be caused by a temporary cause, and the abnormality is eliminated, the controller 170 controls the compressor 150 to restart to return to normal operation to meet the user's demand.
Further, if the controller 170 determines that the inner fan 120 has a failure, it outputs a message indicating that the inner fan 120 has a failure, and controls the air conditioner 100 to stop operating. Outputting the prompt message may prompt the user in time, such as sounding an alarm through a speaker (not shown). The air conditioner 100 can be effectively protected by controlling the air conditioner 100 to stop running, for example, when the inner fan 120 is stuck by foreign matters, the inner fan 120 is turned off to avoid the motor from being burnt. After the air conditioner 100 is turned off, the operation of the outer fan 140, the inner fan 120, and the like is stopped, which can save energy consumption.
Fig. 4 is a flowchart illustrating a method for determining whether an inner fan has failed after a compressor is temporarily turned off according to an embodiment of the present invention. As shown in fig. 4, on the basis of the embodiment in fig. 3, step S300 may specifically include:
in step S310, after the compressor is temporarily turned off, power supply to the inner fan is stopped.
Taking the air conditioner 100 provided in the embodiment of the present invention as an example, after the controller 170 temporarily turns off the compressor 150, the controller controls the corresponding switch to stop supplying power to the inner fan 120.
And step S320, after the second preset time elapses since the power supply to the inner fan is stopped, supplying power to the inner fan again.
Taking the air conditioner 100 provided in the embodiment of the present invention as an example, after a second preset time elapses since the power supply to the inner fan 120 is stopped, the controller 170 resumes the power supply to the inner fan 120 by controlling the corresponding switch. Specifically, the second preset time may be set to 10-60s, and preferably, the second preset time is set to 30 s. The reason for the first abnormality of the inner fan 120 may be a temporary reason, such as temporary jamming of the fan by foreign objects. These external influencing factors may be automatically removed when waiting for a second preset time after stopping the power supply to the inner fan 120. Therefore, after waiting for the second preset time, the power is supplied to the inner fan 120, so that the accuracy of subsequently judging whether the fault exists can be ensured.
And step S330, after the inner fan is powered on again, judging whether a second abnormity occurs in the inner fan.
Taking the air conditioner 100 provided in the embodiment of the present invention as an example, the controller 170 determines whether the second abnormality occurs in the inner fan 120 after the inner fan 120 is powered again. Specifically, under the condition that the inner fan 120 is powered on again, in a third preset time, if a pulse signal fed back by the inner fan 120 is not received or the rotating speed of the inner fan 120 is continuously smaller than a second preset rotating speed, it is determined that the second abnormality occurs in the inner fan 120, otherwise, it is determined that the second abnormality does not occur in the inner fan 120. Specifically, the starting point of the third preset time calculation may be the time when the inner fan 120 is powered again, or may be the time after the inner fan 120 is powered. Optionally, the third preset time is 20-100s, preferably 80 s; the second predetermined speed is 80-150rpm, preferably 100 rpm. The duration of judging whether the second abnormality occurs in the inner fan 120, that is, the third preset time, may be shorter or longer than the first preset time, and since the compressor 150 is not operated during this time, there is no risk of the system pressure being too high even if this time is slightly longer.
Specifically, in some embodiments, a plurality of time periods may be used to determine whether the second abnormality occurs in the inner fan 120. For example, if the pulse signal fed back by the inner fan 120 is not received within a fourth preset time period since the inner fan 120 regains power or the rotation speed of the inner fan 120 is continuously less than the third preset rotation speed, the controller 170 determines that the second abnormality occurs in the inner fan 120. If the feedback pulse signal of the inner fan 120 is received within the fourth preset time and the rotating speed is not less than the third preset rotating speed, further judgment is needed: and acquiring the running state of the inner fan 120 again after the fifth preset time, and if the inner fan 120 feeds back the pulse signal and the rotating speed is not less than the third preset rotating speed, determining that the second abnormality does not occur in the inner fan 120. If the pulse signal is not fed back by the inner fan 120 within the fifth preset time or the rotating speed is less than the third preset rotating speed, it is still determined that the second abnormality occurs in the inner fan 120.
Specifically, the fourth preset time may be 40-60s, the fifth preset time may be 20-30s, and the third preset rotation speed may be 80-150 rpm. FIG. 5 is a schematic diagram of the control logic of an air conditioner according to an embodiment of the present invention. As shown in fig. 5, in a specific embodiment, the step of determining whether the second abnormality occurs in the inner fan 120 includes the following steps: if the pulse signal fed back by the inner fan 120 is not received within 50s after the inner fan 120 regains power or the rotating speed of the inner fan 120 is continuously less than 100rpm, the controller 170 determines that the second abnormality occurs in the inner fan 120. If the feedback pulse signal of the inner fan 120 is received within 50s and the rotating speed is not less than 100rpm, further judgment is needed: and acquiring the running state of the inner fan 120 after 30s, and if the inner fan 120 feeds back a pulse signal and the rotating speed is not less than 100rpm, determining that the second abnormality does not occur in the inner fan 120. If the inner fan 120 does not feed back the pulse signal or the rotation speed is less than 100rpm within the fifth preset time (i.e., the time period of 30s), it is still determined that the second abnormality occurs in the inner fan 120. It can be seen that the judgment is carried out by dividing the time periods into two time periods (50s and 30s), so that the situation that the first time period has no abnormity, but the second time period recovers the abnormal operation can be avoided.
Step S340, if the inner fan is abnormal for the second time, the inner fan is judged to be in fault, otherwise, the inner fan is judged not to be in fault.
Taking the air conditioner 100 provided in the embodiment of the present invention as an example, when it is determined that the second abnormality occurs in the inner fan 120, it is determined that the inner fan 120 has a failure. Otherwise, it is determined that the inner fan 120 has not failed, and at this time, it may be considered that the inner fan 120 has recovered to be normal after the first abnormality occurs. After determining that the fan fails or does not fail, the controller 170 may continue to control the air conditioner 100 according to the step S400, which is not described herein again.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (9)
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| CN111795469B (en) * | 2020-06-23 | 2021-08-24 | 珠海格力电器股份有限公司 | Sterilization control method of air conditioner with sterilization function and air conditioner |
| CN115264747B (en) * | 2022-07-21 | 2024-07-30 | 珠海格力电器股份有限公司 | Communication-free air conditioning unit control method and device and communication-free air conditioning unit |
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