Air conditioner and control method and device thereof, storage medium and computer program product

Abstract

The invention provides an air conditioner and a control method and device thereof, a storage medium and a computer program product, an outer fan of the air conditioner is arranged in an environment easily making contact with water, and the control method comprises the steps that when the air conditioner operates, the working current of the outer fan of the air conditioner is detected; whether the detected working current of the outer fan is larger than or equal to a first preset current limiting value or not is judged; and if it is judged that the working current is larger than or equal to the first preset current limiting value, the rotating speed of the outer draught fan is adjusted and / or the outer draught fan is controlled to stop according to the working current. According to the scheme provided by the invention, the safety and reliability of wading over-current protection of the air conditioner outer fan can be improved.

Description

Technical Field

[0001] The present invention relates to the field of control, and in particular to an air conditioner and a control method, device, storage medium and computer program product thereof. Background Art

[0002] Today's society is developing rapidly, and the logistics industry is booming, so vehicle air conditioning is being used more and more widely. The external fan of the vehicle air conditioner is installed on the outside of the vehicle. For example, the external fan of some vehicle air conditioners is installed on the chassis, such as the external fan of the logistics vehicle air conditioner is installed on the chassis. When passing through a flooded road, the external fan installed on the outside of the vehicle will wade through water. When the water on the road is too deep, the blades of the external fan are immersed in the water. The resistance of the accumulated water to the blades increases the load on the fan, the current increases, and the temperature rise of the motor winding increases. In severe cases, the motor winding overheats and burns, and the air conditioner reports a fault and shuts down. This also causes great inconvenience and losses to the car owner. Therefore, how to improve the safety and reliability of the water-wading overcurrent protection of the air conditioner's external fan has become a technical problem that needs to be solved urgently. Summary of the invention

[0003] The main purpose of the present invention is to overcome the defects of the above-mentioned related technologies and to provide an air conditioner and its control method, device, storage medium and computer program product to solve the problem in the related technologies that the resistance of accumulated water to the fan blades of the external fan of the vehicle air conditioner increases the fan load, the current, the temperature rise of the motor winding, and in severe cases, causes the motor winding to overheat and burn out, causing the air conditioner to report a fault and shut down.

[0004] On one hand, the present invention provides a control method for an air conditioner, wherein an external fan of the air conditioner is arranged in an environment that is easily exposed to water, and the control method includes: when the air conditioner is running, detecting the working current of the external fan of the air conditioner; judging whether the detected working current of the external fan is greater than or equal to a first preset current limiting value; if it is judged that the working current is greater than or equal to the first preset current limiting value, adjusting the speed of the external fan according to the working current and / or controlling the external fan to stop.

[0005] Optionally, a current detection circuit is provided in a driving circuit of the external fan of the air conditioner; detecting the operating current of the external fan of the air conditioner includes: detecting the operating current of the external fan through the current detection circuit.

[0006] Optionally, if it is determined that the working current is greater than or equal to a first preset current limiting value, the external fan speed is adjusted according to the working current and / or the external fan is controlled to stop, including: when the working current value is greater than or equal to the first preset current limiting value and less than the second preset current limiting value, the external fan speed is controlled to be reduced to a preset proportion of the preset maximum speed or to a preset minimum speed; when the working current value is greater than or equal to the second preset current limiting value and less than the third preset current limiting value, and lasts for a second preset time, the external fan is controlled to stop; when the working current value is greater than or equal to the third preset current limiting value, the external fan is controlled to stop.

[0007] Optionally, it also includes: after controlling the speed of the external fan to be reduced to a preset proportion of a preset maximum speed or to a preset minimum speed, detecting the working current of the external fan; when the working current is reduced to a preset recovery value and lasts for a first preset time, controlling the external fan to operate at the set speed.

[0008] Optionally, it also includes: after controlling the external fan to stop, waiting for a preset interval time and then restarting; when the external fan is stopped for a preset number of consecutive times, issuing a corresponding prompt message.

[0009] Optionally, it also includes: after controlling the external fan to stop, accumulating the number of fault shutdowns, waiting for a preset interval time and restarting, if the external fan runs continuously for more than a third preset time, the number of fault shutdowns is cleared.

[0010] On the other hand, the present invention provides a control device for an air conditioner, wherein an external fan of the air conditioner is arranged in an environment that is easily exposed to water, and the control device includes: a detection unit, used to detect the working current of the external fan of the air conditioner when the air conditioner is running; a judgment unit, used to judge whether the working current of the external fan detected by the detection unit is greater than or equal to a first preset current limiting value; and a control unit, used to adjust the speed of the external fan and / or control the external fan to stop according to the working current if the judgment unit judges that the working current is greater than or equal to the first preset current limiting value.

[0011] Optionally, a current detection circuit is provided in the driving circuit of the external fan of the air conditioner; the detection unit detects the working current of the external fan of the air conditioner, including: detecting the working current of the external fan through the current detection circuit.

[0012] Optionally, the control unit adjusts the speed of the external fan and / or controls the external fan to stop according to the working current if the judgment unit determines that the working current is greater than or equal to a first preset current limiting value, including: when the working current value is greater than or equal to the first preset current limiting value and less than the second preset current limiting value, controlling the speed of the external fan to be reduced to a preset proportion of the preset maximum speed or to a preset minimum speed; when the working current value is greater than or equal to the second preset current limiting value and less than the third preset current limiting value, and lasts for a second preset time, controlling the external fan to stop; when the working current value is greater than or equal to the third preset current limiting value, controlling the external fan to stop.

[0013] Optionally, the detection unit is further used to detect the working current of the external fan after the control unit controls the speed of the external fan to be reduced to a preset proportion of a preset maximum speed or to a preset minimum speed; the control unit is also used to control the external fan to operate at a set speed when the working current is reduced to a preset recovery value and lasts for a first preset time.

[0014] Optionally, it also includes: a prompt unit; the control unit is also used to: after controlling the external fan to stop, wait for a preset interval time and then restart; the prompt unit is used to issue a corresponding prompt message when the external fan is stopped for a preset number of consecutive times.

[0015] Optionally, it also includes: a counting unit, which is used to accumulate the number of fault shutdowns after the control unit controls the external fan to shut down, and after waiting for a preset interval and restarting, if the external fan runs continuously for more than a third preset time, the number of fault shutdowns is cleared.

[0016] Another aspect of the present invention provides a storage medium having a computer program stored thereon, wherein the program implements the steps of any of the aforementioned methods when executed by a processor.

[0017] In another aspect, the present invention provides an air conditioner, comprising a processor, a memory, and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of any of the aforementioned methods when executing the program.

[0018] In another aspect, the present invention provides an air conditioner, comprising any of the aforementioned control devices.

[0019] In yet another aspect, the present invention provides a computer program product, comprising a computer program, wherein when the computer program is executed by a processor, the steps of any of the aforementioned methods are implemented.

[0020] According to the technical solution of the present invention, the operating current of the air conditioner outdoor fan is monitored in real time and compared with the preset current limiting value, and corresponding measures are taken for protection.

[0021] According to the technical solution of the present invention, the working current of the external fan monitored in real time is compared with the preset current limiting value to determine whether there is any abnormality in the water-wading operation of the external fan, so as to take protective measures to reduce the speed of the external fan or even shut it down, reduce the working current of the external fan, and reduce the temperature rise of the motor winding to ensure that the motor winding will not overheat and burn out, and the air conditioner will not report a fault and shut down, thereby improving the safety and reliability of the water-wading overcurrent protection of the air conditioner external fan.

[0022] According to the technical solution of the present invention, the working current, which is the direct factor causing the overheating of the motor winding, is monitored. When an abnormality is found in the working current and the motor winding is about to overheat and burn out, measures are taken in advance to avoid overheating and burning of the motor winding and air conditioner shutdown. This can effectively improve the safety and reliability of water overcurrent protection for the air conditioner outdoor fan.

[0023] According to the technical solution of the present invention, a detection current loop is added to the driving circuit of the external fan, the working current of the external fan of the logistics vehicle is monitored in real time, and compared with the preset current limiting value. According to the detection and comparison results, the speed of the external fan is adjusted in time, so that the abnormal operation of the external fan when the logistics vehicle is wading can be discovered as early as possible, and the motor speed can be reduced in advance to achieve the effect of cooling and heat dissipation, avoid the motor winding from burning due to overheating, extend the working life of the external fan, and ensure normal use. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0025] Figure 1 is a method schematic diagram of an embodiment of the air conditioner control method provided by the present invention;

[0026] Figure 2 is a method schematic diagram of a specific embodiment of the air conditioner control method provided by the present invention;

[0027] Figure 3 It is a structural block diagram of an embodiment of the air conditioner control device provided by the present invention. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the specific embodiments of the present invention and the corresponding drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0029] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0030] The present invention provides a control method for an air conditioner. The external fan of the air conditioner is arranged in an environment that is easily exposed to water. For example, the external fan is installed on the chassis of a vehicle. When driving on a road with accumulated water, the external fan is easily exposed to water. When the water on the road is too deep, the fan blades of the external fan may be soaked in water. In a specific embodiment, the air conditioner is a logistics vehicle air conditioner, and the external fan is installed on the chassis of the logistics vehicle.

[0031] Figure 1 It is a method schematic diagram of an embodiment of the air conditioner control method provided by the present invention.

[0032] like Figure 1 As shown, according to one embodiment of the present invention, the control method at least includes step S110, step S120 and step S130.

[0033] Step S110, when the air conditioner is running, detecting the operating current of the external fan of the air conditioner.

[0034] Specifically, a current detection circuit is provided in the driving circuit of the external fan of the air conditioner; the working current of the external fan is detected by the current detection circuit. That is, a current detection circuit is added to the driving circuit of the external fan of the air conditioner to detect the working current of the external fan in real time, that is, to detect the working current of the motor of the external fan.

[0035] Step S120, determining whether the detected operating current of the external fan is greater than or equal to a first preset current limiting value.

[0036] The first preset current limiting value can specifically be the working current value of the motor when the motor of the external fan operates under maximum load conditions and the motor winding temperature meets the maximum temperature rise for long-term stable operation, that is, the limit value of the working current allowed for the motor operation of the external fan. If this value is exceeded, the temperature rise of the motor winding is too high, which causes damage to the winding and affects the service life of the winding.

[0037] Step S130: If it is determined that the operating current is greater than or equal to the first preset current limiting value, the rotation speed of the external fan is adjusted according to the operating current and / or the external fan is controlled to stop.

[0038] In a specific implementation, if the operating current of the external fan is greater than or equal to a first preset current limit value, the external fan speed is adjusted and / or the external fan is controlled to stop in the following manner according to the operating current:

[0039] (1) When the working current value is greater than or equal to a first preset current limiting value and less than a second preset current limiting value, the speed of the external fan is controlled to be reduced to a preset ratio of a preset maximum speed or to a preset minimum speed.

[0040] Preferably, the rotational speed of the external fan is controlled to be reduced to a lower rotational speed between a preset ratio of a preset maximum rotational speed and a preset minimum rotational speed.

[0041] For example, the first preset current limiting value is current limiting value 1, the second preset current limiting value is current limiting value 2, and the preset ratio is 50%. When current limiting value 1 ≤ working current < current limiting value 2, the speed of the external fan is reduced to 50% of the maximum speed or the minimum speed.

[0042] Furthermore, after controlling the speed of the external fan to be reduced to a preset proportion of the preset maximum speed or to a preset minimum speed, the working current of the external fan is detected; when the working current is reduced to a preset recovery value and lasts for a first preset time, the external fan is controlled to operate at the set speed.

[0043] For example, after the speed of the external fan is reduced to 50% of the maximum speed or the minimum speed, when the operating current value of the external fan is less than the recovery value and lasts for more than the first preset time (preset time 1), the protection is released and the external fan operates at the original set speed.

[0044] The preset recovery value may specifically be a rated current value of the motor of the external fan. The first preset time is, for example, 30 seconds.

[0045] (2) When the working current value is greater than or equal to the second preset current limiting value and less than the third preset current limiting value, and lasts for a second preset time, the external fan is controlled to stop.

[0046] For example, the second preset current limit value is current limit value 2, and the third preset current limit value is current limit value 3. When current limit value 2 ≤ working current value < current limit value 3 and lasts for more than the second preset time (preset time 2), the external fan is stopped immediately. The second preset time is, for example, 10s.

[0047] (3) When the operating current value is greater than or equal to a third preset current limiting value, the external fan is controlled to stop.

[0048] For example, when the working current value is ≥ the current limit value 3, the external fan is stopped immediately.

[0049] The second preset current limit value is greater than the first preset current limit value. Preferably, the second preset current limit value is N times the first preset current limit value, and N is greater than 1. For example, the second preset current limit value is 1.5 times the first preset current limit value. The third current limit value is greater than the second current limit value. Preferably, the third current limit value is M times the first current limit value, and M>N; for example, the third preset current limit value is 2 times the first preset current limit value.

[0050] On the basis of the first preset current limit value, a second preset current limit value of N times the first preset current limit value and a third preset current limit value of M times the first preset current limit value are set. When wading, the deeper the water, the greater the working current of the external fan, and the faster the vehicle speed, the greater the working current of the external fan. As the current value increases, the protection measures also change, from speed reduction to shutdown.

[0051] Furthermore, after the external fan is controlled to stop, it is restarted after waiting for a preset interval time; when the external fan is stopped for a preset number of consecutive times, a corresponding prompt message is issued.

[0052] For example, after the outdoor fan stops, it will wait for 1 minute before restarting. The number of fault shutdowns is accumulated each time the outdoor fan stops. If it stops for 6 consecutive times and does not restart, the corresponding fault code will be reported and maintenance will be required.

[0053] Furthermore, after the external fan is controlled to shut down, the number of fault shutdowns is accumulated, and after waiting for a preset interval and restarting, if the external fan runs continuously for more than a third preset time, the number of fault shutdowns is reset.

[0054] That is, each time the external fan is controlled to stop, the number of fault shutdowns is accumulated, and after waiting for a preset interval and restarting, if the external fan continues to run for more than a third preset time (preset time 3), the number of fault shutdowns is cleared. The third preset time is, for example, 10 minutes.

[0055] For example, if the machine is shut down 3 times in total and then restarted for more than the third preset time (10 minutes), the cumulative count of the first 3 times will be cleared. However, if the machine is shut down 6 times (preset number of times) in a row due to the shutdown conditions, it will not restart and report the fault for maintenance.

[0056] In order to clearly illustrate the technical solution of the present invention, the execution process of the air conditioner control method provided by the present invention is described below with reference to a specific embodiment.

[0057] Figure 2 FIG. 1 is a schematic diagram of a specific embodiment of the air conditioning control method provided by the present invention. Figure 2As shown, the working current of the external fan of the logistics vehicle is monitored in real time. When the working current value of the external fan is greater than or equal to the first preset current limiting value and less than the second preset current limiting value (current limiting value 1 ≤ working current value < current limiting value 2), the speed of the external fan is reduced to 50% of the maximum speed or the lowest speed (whichever is lower), until the working current value of the external fan is less than the preset recovery value (working current value < recovery value) and lasts for more than the first preset time (preset time 1), the protection is released, and the external fan operates at the original set speed.

[0058] Monitor the working current of the external fan of the logistics vehicle in real time. When the working current value of the external fan is greater than or equal to the second preset current limiting value and less than the third preset current limiting value (current limiting value 2 ≤ working current value < current limiting value 3), and lasts for more than the preset time 2, stop the external fan immediately.

[0059] Monitor the working current of the external fan of the logistics vehicle in real time. When the working current value of the external fan is greater than or equal to the third preset current limit value (working current value ≥ current limit value 3), stop the external fan immediately. After the external fan stops, wait for 1 minute to restart. If it stops for 6 consecutive times and does not restart, report the corresponding fault code and wait for maintenance. If the external fan runs continuously for more than the preset time 3, clear the accumulated fault count.

[0060] The present invention also provides a control device for an air conditioner. The external fan of the air conditioner is arranged in an environment that is easily exposed to water. For example, the external fan is installed on the chassis of a vehicle. When driving on a road with accumulated water, the external fan is easily exposed to water. When the water on the road is too deep, the fan blades of the external fan may be soaked in water. In a specific embodiment, the air conditioner is a logistics vehicle air conditioner, and the external fan is installed on the chassis of the logistics vehicle.

[0061] Figure 3 FIG. 1 is a structural block diagram of an embodiment of the air conditioner control device provided by the present invention. Figure 3 As shown, the control device 100 includes: a detection unit 110 , a judgment unit 120 and a control unit 130 .

[0062] The detection unit 110 is used to detect the operating current of the external fan of the air conditioner when the air conditioner is running.

[0063] Specifically, a current detection loop is added to the driving circuit of the external fan of the air conditioner to detect the working current of the external fan in real time, that is, to detect the working current of the motor of the external fan.

[0064] The judgment unit 120 is used to judge whether the working current of the external fan detected by the detection unit is greater than or equal to a first preset current limit.

[0065] The first preset current limiting value can specifically be the working current value of the motor when the motor of the external fan operates under maximum load conditions and the motor winding temperature meets the maximum temperature rise for long-term stable operation, that is, the limit value of the working current allowed for the motor operation of the external fan. If this value is exceeded, the temperature rise of the motor winding is too high, which causes damage to the winding and affects the service life of the winding.

[0066] The control unit 130 is used to adjust the speed of the external fan and / or control the external fan to stop according to the working current if the judgment unit judges that the working current is greater than or equal to a first preset current limiting value.

[0067] In a specific implementation, if the operating current of the external fan is greater than or equal to the first preset current limit value, the control unit 130 adjusts the speed of the external fan and / or controls the external fan to stop according to the operating current in the following manner:

[0068] (1) When the working current value is greater than or equal to a first preset current limiting value and less than a second preset current limiting value, the speed of the external fan is controlled to be reduced to a preset ratio of a preset maximum speed or to a preset minimum speed.

[0069] Preferably, the rotational speed of the external fan is controlled to be reduced to a lower rotational speed between a preset ratio of a preset maximum rotational speed and a preset minimum rotational speed.

[0070] For example, the first preset current limiting value is current limiting value 1, the second preset current limiting value is current limiting value 2, and the preset ratio is 50%. When current limiting value 1 ≤ working current < current limiting value 2, the speed of the external fan is reduced to 50% of the maximum speed or the minimum speed.

[0071] Furthermore, the detection unit 110 is also used to detect the working current of the external fan after the control unit controls the speed of the external fan to be reduced to a preset proportion of a preset maximum speed or to a preset minimum speed; the control unit 130 is also used to control the external fan to operate at a set speed when the working current is reduced to a preset recovery value and lasts for a first preset time.

[0072] For example, after the speed of the external fan is reduced to 50% of the maximum speed or the minimum speed, when the operating current value of the external fan is less than the recovery value and lasts for more than the first preset time (preset time 1), the protection is released and the external fan operates at the original set speed.

[0073] The preset recovery value may specifically be a rated current value of the motor of the external fan. The first preset time is, for example, 30 seconds.

[0074] (2) When the working current value is greater than or equal to the second preset current limiting value and less than the third preset current limiting value, and lasts for a second preset time, the external fan is controlled to stop.

[0075] For example, the second preset current limit value is current limit value 2, and the third preset current limit value is current limit value 3. When current limit value 2 ≤ working current value < current limit value 3 and lasts for more than the second preset time (preset time 2), the external fan is stopped immediately. The second preset time is, for example, 10s.

[0076] (3) When the operating current value is greater than or equal to a third preset current limiting value, the external fan is controlled to stop.

[0077] For example, when the working current value is ≥ the current limit value 3, the external fan is stopped immediately.

[0078] The second preset current limit value is greater than the first preset current limit value. Preferably, the second preset current limit value is N times the first preset current limit value, and N is greater than 1. For example, the second preset current limit value is 1.5 times the first preset current limit value. The third current limit value is greater than the second current limit value. Preferably, the third current limit value is M times the first current limit value, and M>N; for example, the third preset current limit value is 2 times the first preset current limit value.

[0079] On the basis of the first preset current limit value, a second preset current limit value of N times the first preset current limit value and a third preset current limit value of M times the first preset current limit value are set. When wading, the deeper the water, the greater the working current of the external fan, and the faster the vehicle speed, the greater the working current of the external fan. As the current value increases, the protection measures also change, from speed reduction to shutdown.

[0080] Furthermore, the device 100 further includes: a prompt unit (not shown). The control unit 130 is also used to: after controlling the external fan to stop, wait for a preset interval and then restart; the prompt unit is used to issue a corresponding prompt message when the external fan stops for a preset number of consecutive times.

[0081] For example, after the outdoor fan stops, it will wait for 1 minute before restarting. Each time the outdoor fan stops, the fault shutdown times are accumulated. If it stops for 6 consecutive times, it will not restart and report the corresponding fault code, waiting for maintenance.

[0082] The device 100 also includes: a counting unit (not shown), which is used to accumulate the number of fault shutdowns after the control unit 130 controls the external fan to shut down, and after waiting for a preset interval and restarting, if the external fan runs continuously for more than a third preset time, the number of fault shutdowns is cleared.

[0083] That is, each time the external fan is controlled to stop, the number of fault shutdowns is accumulated, and after waiting for a preset interval and restarting, if the external fan continues to run for more than a third preset time (preset time 3), the number of fault shutdowns is cleared. The third preset time is, for example, 10 minutes.

[0084] For example, if the machine is shut down 3 times in total and then restarted for more than the third preset time (10 minutes), the cumulative count of the first 3 times will be cleared. However, if the machine is shut down 6 times (preset number of times) in a row due to the shutdown conditions, it will not restart and report the fault for maintenance.

[0085] The present invention also provides a storage medium corresponding to the air conditioner control method, on which a computer program is stored, and when the computer program is executed by a processor, the steps of any of the aforementioned methods are implemented.

[0086] The present invention also provides an air conditioner corresponding to the air conditioner control method, comprising a processor, a memory, and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of any of the aforementioned methods when executing the computer program.

[0087] The present invention also provides an air conditioner corresponding to the control device of the air conditioner, comprising any of the control devices described above.

[0088] The present invention also provides a computer program product corresponding to the air conditioner control method, comprising a computer program, and when the computer program is executed by a processor, the steps of any of the aforementioned methods are implemented.

[0089] Based on this, the solution provided by the present invention monitors the working current, which is the direct factor causing the overheating of the motor winding. When an abnormality is found in the working current and before the motor winding is about to overheat and burn out, measures can be taken in advance to avoid the motor winding overheating and burning out, and the air conditioner shutdown failure. This can effectively improve the safety and reliability of the water overcurrent protection of the air conditioner outdoor fan.

[0090] The solution provided by the present invention adds a detection current loop in the driving circuit of the external fan, monitors the working current of the external fan of the logistics vehicle in real time, and compares it with a preset current limiting value. According to the detection and comparison results, the rotation speed of the external fan is adjusted in time, so as to detect the abnormal operation of the air-conditioning external fan when the vehicle is wading as early as possible, reduce the motor speed in advance, achieve the effect of cooling and heat dissipation, avoid the motor winding from burning due to overheating, extend the working life of the external fan, and ensure normal use.

[0091] The functions described herein may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions may be stored as one or more instructions or codes on a computer-readable medium or transmitted via a computer-readable medium. Other examples and implementations are within the scope and spirit of the present invention and the appended claims. For example, due to the nature of software, the functions described above may be implemented using software executed by a processor, hardware, firmware, hard wiring, or a combination of any of these. In addition, each functional unit may be integrated into a processing unit, each unit may exist physically separately, or two or more units may be integrated into one unit.

[0092] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the device embodiments described above are only schematic. For example, the division of the units can be a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of units or modules, which can be electrical or other forms.

[0093] The units described as separate components may or may not be physically separated, and the components of the control device may or may not be physical units, that is, they may be located in one place or distributed in multiple units. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0094] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the relevant technology or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions to enable a computer device (which can be a personal computer, a server or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), mobile hard disk, disk or optical disk and other media that can store program codes.

[0095] The above description is only an embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention shall be included in the scope of the claims of the present invention.

Claims

1. A method for controlling an air conditioner, characterized in that: The external fan of the air conditioner is arranged in an environment that is easily exposed to water, and the control method comprises: When the air conditioner is running, detecting the working current of the external fan of the air conditioner; Determine whether the detected working current of the external fan is greater than or equal to a first preset current limiting value; If it is determined that the operating current is greater than or equal to the first preset current limiting value, the rotation speed of the external fan is adjusted according to the operating current and / or the external fan is controlled to stop.

2. The method according to claim 1, characterized in that A current detection circuit is provided in the driving circuit of the external fan of the air conditioner; Detecting the operating current of the external fan of the air conditioner includes: detecting the operating current of the external fan through the current detection circuit.

3. The method according to claim 1, characterized in that If it is determined that the working current is greater than or equal to the first preset current limiting value, adjusting the speed of the external fan and / or controlling the external fan to stop according to the working current includes: When the working current value is greater than or equal to the first preset current limit value and less than the second preset current limit value, the speed of the external fan is controlled to be reduced to a preset ratio of the preset maximum speed or to a preset minimum speed; When the working current value is greater than or equal to the second preset current limiting value and less than the third preset current limiting value, and lasts for a second preset time, controlling the external fan to stop; When the working current value is greater than or equal to a third preset current limiting value, the external fan is controlled to stop.

4. The method according to claim 3, characterized in that Also includes: After controlling the speed of the external fan to decrease to a preset ratio of a preset maximum speed or to a preset minimum speed, detecting the operating current of the external fan; When the working current decreases to a preset recovery value and lasts for a first preset time, the external fan is controlled to run at a set speed.

5. The method according to any one of claims 1 to 4, characterized in that: Also includes: After controlling the external fan to stop, restart it after waiting for a preset interval; When the external fan is shut down for a preset number of consecutive times, a corresponding prompt message is issued.

6. The method according to claim 5, characterized in that Also includes: After the external fan is controlled to stop, the number of fault shutdowns is accumulated, and after waiting for a preset interval time and restarting, if the external fan runs continuously for more than a third preset time, the number of fault shutdowns is reset.

7. A control device for an air conditioner, characterized in that: The external fan of the air conditioner is arranged in an environment that is easily exposed to water, and the control device comprises: A detection unit, used for detecting a working current of an external fan of the air conditioner when the air conditioner is running; A judging unit, used for judging whether the working current of the external fan detected by the detecting unit is greater than or equal to a first preset current limiting value; A control unit is used to adjust the speed of the external fan and / or control the external fan to stop according to the working current if the judgment unit judges that the working current is greater than or equal to a first preset current limiting value.

8. A storage medium, characterized in that: A computer program is stored thereon, and when the program is executed by a processor, the steps of any method described in claims 1-6 are implemented.

9. An air conditioner, characterized in that: The method comprises a processor, a memory and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of any method described in claims 1 to 6 when executing the program, or comprises the control device described in claim 7.

10. A computer program product, characterized in that The invention comprises a computer program, which implements the steps of any one of the methods of claims 1 to 6 when executed by a processor.

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