Control method and device for compressor overload protection and air conditioner

Abstract

The application provides a control method and device for compressor overload protection and an air conditioner. The method comprises the following steps: in the case that the compressor of an equipment is overloaded, at least controlling the compressor to restart, and acquiring the number of times that the compressor is overloaded, wherein the equipment comprises at least one of an air conditioner and a dehumidifier; in the case that the number of times that the compressor is overloaded reaches a preset number of times, determining that the compressor is faulty; and in the case that the compressor is faulty, at least controlling the compressor to stop.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of air conditioners, in particular to a control method and device for compressor overload protection and an air conditioner. BACKGROUND

[0002] Currently, when the compressor is in overload protection shutdown, the system does not know that the compressor has been shut down, continues to run and starts the compressor, which causes the compressor to frequently start and stop in a short time, and the system pipeline is frequently impacted by pulse pressure, thereby increasing the risk of pipeline explosion. SUMMARY

[0003] The main purpose of the present application is to provide a control method and device for compressor overload protection and an air conditioner to at least solve the problem of high risk of pipeline explosion in the prior art.

[0004] In order to achieve the above purpose, according to one aspect of the present application, a control method for compressor overload protection is provided, comprising: in the case that the compressor of a device is overloaded, at least controlling the compressor to restart, and acquiring the number of times that the compressor is overloaded, the device comprising at least one of an air conditioner and a dehumidifier; in the case that the number of times that the compressor is overloaded reaches a preset number of times, determining that the compressor is malfunctioning; in the case that the compressor is malfunctioning, at least controlling the compressor to shut down.

[0005] Optionally, at least controlling the compressor to shut down comprises: determining that the duration of the device in a first predetermined state after being powered on is a first duration, the duration of the device in a second predetermined state after being powered on is a second duration, the duration of the compressor in the second predetermined state after restarting is a third duration, and the duration of the compressor in the first predetermined state after restarting is a fourth duration, the first predetermined state is a state in which the difference between the internal temperature of the device and the temperature of the indoor evaporator coil of the device is less than a first preset temperature, the second predetermined state is a state in which the difference is greater than a second preset temperature, and the second preset temperature is greater than the first preset temperature; determining whether the smaller one of the second duration and the third duration is greater than or equal to a preset threshold time; in the case that the smaller one is greater than or equal to the threshold time, controlling the compressor to run for a first predetermined time and then shut down for a second predetermined time, the first predetermined time being the product of a running coefficient and the smaller one, the running coefficient being a preset coefficient, and the second predetermined time being the larger one of the first duration and the fourth duration; in the case that the smaller one is less than the threshold time, controlling the device to shut down.

[0006] Optionally, before at least controlling the compressor to restart, the method further comprises: determining whether the first duration is greater than a preset time in a case that the device is powered on; determining that the compressor is overloaded in a case that the first duration is greater than the preset time, and determining that the compressor is not overloaded in a case that the first duration is less than or equal to the preset time.

[0007] Optionally, the operation coefficient is less than 1.

[0008] Optionally, in a case that the compressor is overloaded, at least controlling the compressor to restart comprises: controlling the compressor to stop in a case that the compressor is overloaded; and controlling the stopped compressor to restart in a case that a difference between an internal temperature of the device and an indoor evaporator coil temperature of the device is greater than or equal to a third preset temperature.

[0009] Optionally, in a case that the compressor is not overloaded, the method further comprises: obtaining an environmental parameter, the environmental parameter comprising an environmental temperature and an environmental humidity; comparing the environmental parameter with a user-set parameter, the user-set parameter comprising a user-set temperature and a user-set humidity; determining a working mode of the device according to a user-set working mode, the working mode comprising a cooling mode, a heating mode, and a dehumidifying mode; starting the compressor and controlling a fan of the device to operate in a case that the device operates in the cooling mode and the environmental temperature is higher than the user-set temperature; controlling the compressor to stop in a case that the device operates in the cooling mode and the environmental temperature is less than or equal to the user-set temperature; starting the compressor and controlling the fan to operate in a case that the device operates in the heating mode and the environmental temperature is less than the user-set temperature; and controlling the compressor to stop in a case that the device operates in the heating mode and the environmental temperature is greater than or equal to the user-set temperature.

[0010] Optionally, controlling the fan of the device to operate comprises: obtaining an evaporator temperature of the device; comparing the evaporator temperature with a preset evaporator temperature; reducing a rotating speed of the fan in a case that the evaporator temperature is less than or equal to the preset evaporator temperature; and increasing the rotating speed of the fan in a case that the evaporator temperature is greater than the preset evaporator temperature.

[0011] Optionally, the method further comprises: in the case that the compressor is overloaded, sending a prompt message to a terminal, the prompt message representing that the compressor is overloaded.

[0012] According to another aspect of the present application, a compressor overload protection device is provided, comprising: a first control unit configured to control at least a restart of a compressor of a device in the case that the compressor is overloaded, and obtain a number of times that the compressor is overloaded, the device comprising at least one of an air conditioner and a dehumidifier; a determination unit configured to determine that the compressor is malfunctioning in the case that the number of times that the compressor is overloaded reaches a preset number of times; and a second control unit configured to control at least a shutdown of the compressor in the case that the compressor is malfunctioning.

[0013] According to still another aspect of the present application, an air conditioner is provided, comprising: one or more processors, a memory, and one or more programs, wherein the one or more programs are stored in the memory and configured to be executed by the one or more processors, and the one or more programs comprise a program for performing any one of the methods.

[0014] By applying the technical solution of the present application, the compressor is first controlled to restart and the number of times that the compressor is overloaded is obtained; then the compressor is determined to be malfunctioning in the case that the number of times that the compressor is overloaded reaches a preset number of times; and finally the compressor is controlled to at least shutdown in the case that the compressor is malfunctioning. By obtaining the number of times that the compressor is overloaded, the present application intervenes in the start and stop of the compressor when the number of times that the compressor is overloaded reaches a preset number of times, thereby avoiding frequent start and stop of the compressor in a short time and reducing the risk of pipe explosion. BRIEF DESCRIPTION OF DRAWINGS

[0015] The accompanying drawings, which form a part of the present description, are included to provide a further understanding of the application and are incorporated in and constitute a part of this application. The embodiments of the present application illustrated in the drawings are presented by way of example or for clarity, and are not intended to limit the present application to the specific embodiments illustrated in the drawings. In the drawings:

[0016] Figure 1 Fig. 1 shows a hardware structure block diagram of a mobile terminal according to an embodiment of the present application, which performs a control method for compressor overload protection;

[0017] Figure 2 Fig. 2 shows a flowchart of a control method for compressor overload protection according to an embodiment of the present application;

[0018] Figure 3 Fig. 3 shows a flowchart of a control method for compressor overload protection according to an embodiment of the present application;

[0019] Figure 4A schematic view of an overload protection device of a compressor is shown.

[0020] In the above drawings, the following reference signs apply:

[0021] 102, processor; 104, memory; 106, transmission device; 108, input / output device. DETAILED DESCRIPTION

[0022] It should be noted that the embodiments and features of the embodiments in the present application can be combined with each other without conflict. The present application will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

[0023] In order to enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor should belong to the scope of protection of the present application.

[0024] It should be noted that the terms "first", "second" and the like in the specification and claims of the present application and the drawings are used to distinguish similar objects, and do not necessarily indicate a specific order or a chronological sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented. In addition, the terms "comprise" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device comprising a series of steps or units does not have to be limited to those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to the process, method, product or device.

[0025] As introduced in the background, in the prior art, when the compressor is overloaded and protection shutdown, the system does not know that the compressor has been shutdown, and continues to run and start the compressor, which causes the compressor to start and stop frequently in a short time, and the system pipeline is frequently impacted by pulse pressure, so that the equipment containing the compressor has a high risk of pipeline explosion. To solve the above technical problems, the embodiments of the present application provide a control method, device and air conditioner for compressor overload protection. The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present application.

[0026] The method embodiments provided in the embodiments of the present application can be executed in a mobile terminal, a computer terminal or a similar computing device. Taking the case of running on a mobile terminal, Figure 1This is a hardware structure block diagram of a mobile terminal for a compressor overload protection control method according to an embodiment of the present invention. Figure 1 As shown, a mobile terminal may include one or more ( Figure 1 Only one is shown in the diagram. A processor 102 (which may include, but is not limited to, a microprocessor MCU or a programmable logic device FPGA, etc.) and a memory 104 for storing data are also shown. The mobile terminal may further include a transmission device 106 for communication functions and an input / output device 108. Those skilled in the art will understand that... Figure 1 The structure shown is for illustrative purposes only and does not limit the structure of the mobile terminal. For example, the mobile terminal may also include components that are larger than... Figure 1 The more or fewer components shown, or having the same Figure 1 The different configurations shown.

[0027] The memory 104 can be used to store computer programs, such as application software programs and modules, like the computer program corresponding to the compressor overload protection control method in this embodiment of the invention. The processor 102 executes various functional applications and data processing by running the computer program stored in the memory 104, thereby implementing the method described. The memory 104 may include high-speed random access memory and may also include non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some instances, the memory 104 may further include memory remotely located relative to the processor 102, and these remote memories can be connected to the mobile terminal via a network. Examples of such networks include, but are not limited to, the Internet, corporate intranets, local area networks, mobile communication networks, and combinations thereof. The transmission device 106 is used to receive or send data via a network. Specific examples of such networks may include wireless networks provided by the mobile terminal's communication provider. In one example, the transmission device 106 includes a network interface controller (NIC), which can be connected to other network devices via a base station to communicate with the Internet. In one example, the transmission device 106 may be a radio frequency (RF) module, which is used to communicate with the Internet wirelessly.

[0028] This embodiment provides a control method for compressor overload protection running on a mobile terminal, computer terminal or similar computing device. It should be noted that the steps shown in the flowchart in the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions. Also, although the logical order is shown in the flowchart, in some cases the steps shown or described can be executed in a different order than that shown here.

[0029] Figure 2 is a flow chart of a control method of compressor overload protection according to an embodiment of the present application. As shown in the figure, the method comprises the following steps: Figure 2

[0030] Step S201, in the case that the compressor of a device is overloaded, at least control the compressor to restart, and obtain the number of times that the compressor is overloaded, the device comprising at least one of an air conditioner and a dehumidifier;

[0031] Specifically, the air conditioner can be a fixed frequency air conditioner, and the compressor can be a fixed frequency compressor.

[0032] Step S202, in the case that the number of times that the compressor is overloaded reaches a preset number of times, determine that the compressor is malfunctioning;

[0033] Specifically, the preset number of times is a safety value of the number of times that the air conditioner allows the compressor to be overloaded, and is a parameter for determining whether the compressor is malfunctioning. If it is determined that the number of times that the compressor is overloaded reaches the preset number of times, it is determined that the compressor is malfunctioning.

[0034] Step S203, in the case that the compressor is malfunctioning, at least control the compressor to stop.

[0035] Specifically, the compressor can be forced to stop working by disconnecting the AC contactor of the device. Taking the device as an air conditioner as an example, if the device is in a cooling mode, the indoor fan of the air conditioner is controlled to start, and if the device is in a heating mode, the indoor fan of the device is controlled to stop.

[0036] According to the embodiment, the compressor is first controlled to restart and the number of times that the compressor is overloaded is obtained; then in the case that the number of times that the compressor is overloaded reaches a preset number of times, it is determined that the compressor is malfunctioning; finally, in the case that the compressor is malfunctioning, at least the compressor is controlled to stop. The present application obtains the number of times that the compressor is overloaded, and intervenes in the start and stop of the compressor when the number of times reaches a preset number of times, thereby avoiding the frequent start and stop of the compressor in a short time and reducing the risk of pipe explosion.

[0037] In an optional solution, step S201: at least control the compressor to stop, comprising:

[0038] ​In step S2011, it is determined that the first duration is the time length of the device in the first predetermined state after the device is powered on, the second duration is the time length of the device in the second predetermined state after the device is powered on, the third duration is the time length of the compressor in the second predetermined state after the compressor is restarted, and the fourth duration is the time length of the compressor in the first predetermined state after the compressor is restarted. The first predetermined state is a state in which the difference between the internal temperature of the device and the evaporator coil temperature of the indoor unit of the device is less than a first preset temperature, and the second predetermined state is a state in which the difference is greater than a second preset temperature, and the second preset temperature is greater than the first preset temperature.

[0039] Specifically, when the compressor is overloaded, the internal temperature of the device is substantially the same as the evaporator coil temperature of the indoor unit of the device. Considering the accuracy of temperature measurement and detection deviation, the first preset temperature is recommended to be 0.5-1.5℃.

[0040] In step S2012, it is determined whether the smaller one of the second duration and the third duration is greater than or equal to a preset threshold time.

[0041] Specifically, the threshold time can be adjusted according to actual conditions.

[0042] In step S2013, in the case where the smaller one is greater than or equal to the threshold time, the compressor is controlled to run for a first predetermined time and then stop for a second predetermined time. The first predetermined time is the product of a running coefficient and the smaller one, the running coefficient is a preset coefficient, and the second predetermined time is the larger one of the first duration and the fourth duration.

[0043] In step S2014, in the case where the smaller one is less than the threshold time, the device is controlled to shut down.

[0044] In the embodiment, by determining whether the smaller one of the second duration and the third duration is greater than or equal to a preset threshold time, in the case where the smaller one is greater than or equal to the preset threshold time, it is indicated that controlling the compressor to stop for a period of time can alleviate the problem of compressor failure, so the time of running and stopping of the compressor is further controlled, thereby further alleviating the problem of compressor failure. In the case where the smaller one is less than the preset threshold time, it is indicated that controlling the compressor to stop for a period of time cannot alleviate the problem of compressor failure, so the device is directly controlled to shut down. Thus, in the case of compressor failure, further measures are taken to reduce the possibility of device pipe explosion.

[0045] In another optional solution, before at least controlling the compressor to restart, the method further comprises: determining whether the first duration is greater than a preset time in the case that the device is powered on; determining that the compressor is overloaded in the case that the first duration is greater than the preset time, and determining that the compressor is not overloaded in the case that the first duration is less than or equal to the preset time. In the embodiment, the first duration is monitored and compared with the preset time, so as to accurately determine whether the compressor is overloaded, thereby providing accurate support for subsequent timely determination of compressor failure, and further reducing the possibility of pipe explosion.

[0046] Specifically, the internal temperature of the device is basically the same as the evaporator coil temperature of the indoor unit of the device when the compressor is overloaded for about 20s. Considering the detection accuracy and detection deviation of the temperature, the preset time can be 10s to 60s.

[0047] In some other exemplary embodiments, the operation coefficient is less than 1.

[0048] Specifically, the operation coefficient can be any number between 0.5 and 0.95.

[0049] In the embodiment, the operation coefficient is less than 1, which ensures that the running time of the compressor is less than the second duration and the third duration, further shortens the running time of the compressor, ensures that the compressor will not be shut down due to too long running time, further controls the number of times of starting and stopping of the compressor due to overload, and reduces the risk of pipe explosion.

[0050] In another optional solution, in the case that the compressor is overloaded, at least controlling the compressor to restart comprises: controlling the compressor to stop in the case that the compressor is overloaded; and controlling the stopped compressor to restart in the case that the difference between the internal temperature of the device and the evaporator coil temperature of the indoor unit of the device is greater than or equal to a third preset temperature.

[0051] In the embodiment, in the case that the compressor is overloaded, the compressor is timely controlled to stop, so that the compressor can be cooled for a certain duration, and then restarted when the difference between the internal temperature of the device and the evaporator coil temperature of the indoor unit of the device reaches the third preset temperature, thereby further avoiding pipe explosion.

[0052] Specifically, the third preset temperature is less than the second preset temperature and greater than the first preset temperature.

[0053] Specifically, the third preset temperature can be 1.1℃.

[0054] In another optional solution, in the case that the compressor is not overloaded, the method further comprises:

[0055] Step S204, obtaining an environment parameter, the environment parameter including an environment temperature and an environment humidity;

[0056] Specifically, the environment temperature and the environment humidity are collected in real time by a sensor installed on the device.

[0057] Step S205, comparing the environment parameter with a user setting parameter, the user setting parameter including a user setting temperature and a user setting humidity;

[0058] Specifically, whether the user demand is met is determined by comparing the environment parameter with the user setting parameter.

[0059] Step S206, determining a working mode of the device according to a user setting working mode, the working mode including a refrigeration mode, a heating mode and a dehumidification mode;

[0060] Step S207, starting the compressor and controlling a fan of the device to run in a case that the device runs in the refrigeration mode and the environment temperature is higher than the user setting temperature, and controlling the compressor to stop in a case that the device runs in the refrigeration mode and the environment temperature is lower than or equal to the user setting temperature;

[0061] Specifically, in the refrigeration mode, when the environment temperature is higher than the user setting temperature, the control system controls the compressor to start. The compressor compresses the gaseous refrigerant, and then sends it to the condenser to dissipate heat, and then enters the evaporator through the capillary tube to make the evaporator cold. The fan of the device blows the indoor air from the evaporator, thereby blowing out the cold air. When the indoor temperature reaches or is lower than the user setting temperature, the control system controls the compressor to stop.

[0062] Step S208, starting the compressor and controlling the fan to run in a case that the device runs in the heating mode and the environment temperature is lower than the user setting temperature, and controlling the compressor to stop in a case that the device runs in the heating mode and the environment temperature is higher than or equal to the user setting temperature;

[0063] Specifically, in the heating mode, when the environment temperature is lower than the user setting temperature, the control system controls the compressor to start, and the low-temperature and low-pressure refrigerant gas is sucked in, enters the condenser after compression, enters the evaporator through the throttling device, and realizes heating. At the same time, the fan of the device blows out the hot air to improve the indoor temperature. When the environment temperature reaches or exceeds the user setting temperature, the control system controls the compressor to stop.

[0064] Step S209, in the case that the device operates in the dehumidification mode and the ambient humidity is higher than the user-set humidity, starting the compressor, and in the case that the device operates in the dehumidification mode and the ambient humidity is lower than the user-set humidity, controlling the compressor to stop.

[0065] Specifically, in the dehumidification mode, in the case that the ambient humidity is higher than the user-set humidity, the control system controls the compressor to start, and the refrigerant compressed into high-temperature and high-pressure gas is sent into the condenser, passes through the throttling device, and then enters the evaporator, while the water vapor in the air condenses into water on the surface of the evaporator and is discharged to the outside, so as to realize the dehumidification effect. In the dehumidification mode, in order to enhance the dehumidification effect, the air flow rate of the device fan is usually reduced. When the indoor humidity is reduced to below the user-set humidity, the control system controls the compressor to stop.

[0066] In the embodiments, in the case that the compressor does not overload, the ambient parameter is continuously acquired, compared with the user-set parameter in real time, and the operating parameter is adjusted in time, so that the ambient parameter meets the user-set parameter, and the user experience is improved.

[0067] In some example schemes of the present application, the control of the fan of the device comprises: acquiring the evaporator temperature of the device; comparing the size of the evaporator temperature with that of the preset evaporator temperature; in the case that the evaporator temperature is lower than or equal to the preset evaporator temperature, reducing the rotating speed of the fan; and in the case that the evaporator temperature is higher than the preset evaporator temperature, increasing the rotating speed of the fan. In the embodiments, in the case that the evaporator temperature is lower than or equal to the preset evaporator temperature, the rotating speed of the fan is reduced, so that the evaporator can be warmed up as soon as possible, and in the case that the evaporator temperature is higher than the preset evaporator temperature, the rotating speed of the fan is increased, so that the evaporator can be cooled faster. The rotating speed of the fan is adjusted according to the comparison result of the evaporator temperature and the preset evaporator temperature, which helps the evaporator to operate in a suitable temperature range, thereby ensuring the stability of the system.

[0068] According to some optional schemes of the present application, the method further comprises: in the case that the compressor overloads, sending a reminder message representing that the compressor has overloaded to a terminal. In the embodiments, the user is immediately notified by outputting the reminder message, so that the user can quickly understand that the current working state of the compressor is abnormal, and thus corresponding measures can be taken. The compressor overload information contained in the reminder message can provide important clues for subsequent fault diagnosis, help technicians quickly locate the problem, and improve the maintenance efficiency.

[0069] Specifically, the reminding message can be a shutdown prompt information, for example, a prompt information of "the system is currently working abnormally and will be shut down", used to prompt that the device is about to perform power-off or shutdown processing, and the reminding message can also be a conversion prompt information, for example, an information of "the system is currently working abnormally and will be converted into a safe mode", used to prompt that the compressor intervention control of the device is about to be compressed.

[0070] In order to enable a person skilled in the art to more clearly understand the technical solutions of the present application, the implementation process of the compressor overload protection control method of the present application will be described in detail below in combination with specific embodiments.

[0071] The present embodiment relates to a specific compressor overload protection control method, as shown in Figure 3 The method comprises the following steps:

[0072] Step S1: judging whether the device is in a second predetermined state, if not, performing normal operation, and if yes, executing step S2;

[0073] Step S2: recording the duration of the second predetermined state;

[0074] Step S3: judging whether the compressor is overloaded, if not, performing normal operation, and if yes, executing step S4;

[0075] Step S4: restarting the compressor and recording the number of times of compressor overload and the duration of the first predetermined state;

[0076] Step S5: judging whether the number of times of overload reaches a preset number of times, if not, cyclically executing steps S1, S2, S3 and S4 at least once, and if yes, executing step S6;

[0077] Step S6: judging whether the minimum value of the recorded duration of the second predetermined state is greater than or equal to a preset threshold time, if not, controlling the device to shut down, and if yes, executing step S7;

[0078] Step S7: controlling the compressor to operate for a first predetermined time and then shut down for a second predetermined time, and then executing step S1.

[0079] It is noted that the steps illustrated in the flowcharts of the figures can be executed by computer systems such as a group of computers executing computer-executable instructions in a computer program. Although the steps are presented in a logical order, in some cases, the steps can be performed in a different order than presented.

[0080] Exemplarily, the device is started and runs in the refrigeration mode, it is judged whether the difference between the internal temperature of the device and the evaporator coil temperature of the indoor unit of the device is greater than or equal to 3℃, specifically, the 3℃ here can be adjusted according to the situation, if it is not satisfied, the normal operation is performed, if it is satisfied, it indicates that the device has a regulating effect, at this time, the time is started, the duration that the difference between the internal temperature of the device and the evaporator coil temperature of the indoor unit of the device is greater than or equal to 3℃ is recorded, and the overload protection judgment is started, the judgment condition is that the difference between the internal temperature of the device and the evaporator coil temperature of the indoor unit of the device is less than 1℃ and satisfies greater than or equal to 30s, the difference between the internal temperature of the device and the evaporator coil temperature of the indoor unit of the device less than 1℃ indicates that the device has no regulating effect at this time, if the compressor does not appear overload, the normal operation is performed, if the compressor appears overload, the compressor is restarted, and it is judged whether the number of times of compressor overload reaches 2 times, if the number of times of compressor overload does not reach 2 times, it is continuously judged whether the difference between the internal temperature of the device and the evaporator coil temperature of the indoor unit of the device is greater than or equal to 3℃, and the duration that the difference between the internal temperature of the device and the evaporator coil temperature of the indoor unit of the device is greater than or equal to 3℃ is recorded, if the number of times of compressor overload reaches 2 times, it indicates that the compressor appears failure, at this time, it is judged whether the smaller value of the two recorded durations that the difference between the internal temperature of the device and the evaporator coil temperature of the indoor unit of the device is greater than or equal to 3℃ is greater than 30 minutes, specifically, the 30 minutes here can be adjusted according to the situation. If the smaller value is less than 30 minutes, it indicates that the time of regulating effect is too short, therefore, the device is stopped and a prompt is output to assist after-sales troubleshooting, if the smaller value is greater than 30 minutes, the compressor continues to run for a first predetermined time and is stopped for a second predetermined time. The first predetermined time is a running coefficient multiplied by the smaller value, exemplarily, the running coefficient takes a value of 0.8, therefore, the running time at this time is less than the running time of the previous two times of causing the compressor overload, preventing the compressor from appearing overload again.

[0081] The embodiment of the present application further provides an overload protection device of a compressor, it is necessary to explain that the overload protection device of the compressor of the embodiment of the present application can be used to execute the control method for the overload protection of the compressor provided by the embodiment of the present application. The device is used to realize the embodiment and preferred embodiment, and the description is not repeated. As used below, the term "module" can be a combination of software and / or hardware that implements a predetermined function. Although the device described in the following embodiment is preferably implemented in software, hardware, or a combination of software and hardware is also possible and conceived.

[0082] The following describes an overload protection device of a compressor provided by an embodiment of the present application.

[0083] Figure 4 is a schematic diagram of an overload protection device of a compressor according to an embodiment of the present application. As shown in the figure, the device includes: Figure 4

[0084] a first control unit 10, configured to control at least a restart of a compressor of a device and obtain a number of times of overload of the compressor in a case where the compressor of the device is overloaded, the device including at least one of an air conditioner and a dehumidifier;

[0085] Specifically, the air conditioner can be a fixed-frequency air conditioner, and the compressor can be a fixed-frequency compressor.

[0086] a first determination unit 20, configured to determine that the compressor is malfunctioning in a case where the number of times of overload of the compressor reaches a preset number of times.

[0087] Specifically, the preset number of times is a safety value of a number of times of overload protection of the compressor allowed by the air conditioner, and is a parameter for determining whether the compressor is malfunctioning. If it is determined that the number of times of overload protection of the compressor reaches the preset number of times, it is determined that the compressor is malfunctioning.

[0088] a second control unit 30, configured to control at least a shutdown of the compressor in a case where the compressor is malfunctioning.

[0089] Specifically, the compressor can be forced to stop working by disconnecting an alternating current contactor of the device. Taking the air conditioner as an example, if the device is in a cooling mode, an indoor fan of the air conditioner is controlled to be turned on, and if the device is in a heating mode, the indoor fan of the device is controlled to be turned off.

[0090] According to the embodiment, the first control unit controls the restart of the compressor and obtains the number of times of overload of the compressor, the first determination unit determines that the compressor is malfunctioning in a case where the number of times of overload of the compressor reaches a preset number of times, and the second control unit controls at least the shutdown of the compressor in a case where it is determined that the compressor is malfunctioning. The present application obtains the number of times of overload of the compressor, and intervenes in the start and stop of the compressor when the number of times of overload reaches the preset number of times, thereby avoiding frequent start and stop of the compressor in a short time and reducing the risk of pipe explosion.

[0091] In an optional implementation, the second control unit includes:

[0092] ​The first determining module determines that a time length of the device in a first predetermined state after the device is powered on is a first duration, a time length of the device in a second predetermined state after the device is powered on is a second duration, a time length of the compressor in the second predetermined state after the compressor is restarted is a third duration, and a time length of the compressor in the first predetermined state after the compressor is restarted is a fourth duration, the first predetermined state is a state in which a difference between an internal temperature of the device and an indoor evaporator coil temperature of the device is less than a first preset temperature, and the second predetermined state is a state in which the difference is greater than a second preset temperature, the second preset temperature being greater than the first preset temperature.

[0093] Specifically, when the compressor is overloaded, the internal temperature of the device is substantially the same as the indoor evaporator coil temperature of the device, and considering the accuracy of temperature measurement and detection deviation, the first preset temperature is recommended to be 0.5-1.5℃.

[0094] The second determining module determines whether a smaller one of the second duration and the third duration is greater than or equal to a preset threshold time.

[0095] Specifically, the threshold time can be adjusted according to actual conditions.

[0096] The first control module controls the compressor to run for a first predetermined time and then stop for a second predetermined time when the smaller one is greater than or equal to the threshold time, the first predetermined time being a product of a running coefficient and the smaller one, the running coefficient being a preset coefficient, and the second predetermined time being a larger one of the first duration and the fourth duration.

[0097] The second control module controls the device to shut down when the smaller one is less than the threshold time.

[0098] In the embodiments, whether the smaller one of the second duration and the third duration is greater than or equal to a preset threshold time is determined, and when the smaller one is greater than or equal to the preset threshold time, it is indicated that controlling the compressor to stop for a period of time can alleviate the problem of compressor overload, so the time of running and stopping of the compressor is further controlled, thereby further alleviating the problem of compressor overload, and when the smaller one is less than the preset threshold time, it is indicated that controlling the compressor to stop for a period of time cannot alleviate the problem of compressor overload, so the device is directly controlled to shut down, thereby further measures are taken in the case of compressor overload, and the possibility of device pipe explosion is reduced.

[0099] In another optional solution, the device further includes:

[0100] A second determining unit determines whether the first duration is greater than a preset time in a case where the device is powered on before at least controlling the compressor to restart;

[0101] A third determining unit determines that the compressor is overloaded in a case where the first duration is greater than the preset time, and determines that the compressor is not overloaded in a case where the first duration is less than or equal to the preset time.

[0102] In the embodiment, the compressor overload condition can be fed back to the control system in time, so that the control system can make a decision in time according to the compressor condition, and the possibility of pipe explosion is further reduced.

[0103] Specifically, the internal temperature of the device and the evaporator coil temperature of the indoor unit of the device are basically the same about 20 seconds after the compressor is overloaded, and the preset time can be 10-60 seconds considering the detection accuracy and detection deviation of the temperature.

[0104] In some other example embodiments, the operation coefficient is less than 1.

[0105] Specifically, the operation coefficient can be any number in 0.5-0.95.

[0106] In the embodiment, the operation coefficient is less than 1, which ensures that the running time of the compressor is less than the second duration and the third duration, further shortens the running time of the compressor, ensures that the compressor will not be shut down due to too long running time, further controls the number of times of starting and stopping of the compressor due to overload, and reduces the risk of pipe explosion.

[0107] In some other example embodiments, the first control unit comprises:

[0108] A first control module controls the compressor to shut down in a case where the compressor is overloaded.

[0109] A second control module controls the compressor to restart in a case where the difference between the internal temperature of the device and the evaporator coil temperature of the indoor unit of the device is greater than or equal to a third preset temperature.

[0110] In the embodiment, the compressor is shut down in time in a case where the compressor is overloaded, so that the compressor can be cooled for a period of time, and then restarted when the difference between the internal temperature of the device and the evaporator coil temperature of the indoor unit of the device reaches the third preset temperature, further avoiding pipe explosion.

[0111] Specifically, the third preset temperature is less than the second preset temperature and greater than the first preset temperature.

[0112] In particular, the third preset temperature can be 1.1℃.

[0113] In another alternative, the device further comprises:

[0114] An acquisition unit, which acquires environmental parameters including environmental temperature and environmental humidity when the compressor is not overloaded;

[0115] In particular, the environmental temperature and the environmental humidity are collected in real time by sensors installed on the equipment.

[0116] A comparison unit, which compares the environmental parameters with user-set parameters including user-set temperature and user-set humidity;

[0117] In particular, whether the user's demand is met is determined by comparing the environmental parameters with the user-set parameters.

[0118] A fourth determination unit, which determines the working mode of the equipment according to the user-set working mode, the working mode including a cooling mode, a heating mode and a dehumidification mode;

[0119] A third control unit, which starts the compressor and controls the fan of the equipment to run when the equipment runs in the cooling mode and the environmental temperature is higher than the user-set temperature, and controls the compressor to stop when the equipment runs in the cooling mode and the environmental temperature is lower than or equal to the user-set temperature;

[0120] In particular, in the cooling mode, when the environmental temperature is higher than the user-set temperature, the control system controls the compressor to start. The compressor compresses the gaseous refrigerant, then sends it to the condenser to dissipate heat, and then enters the evaporator through the capillary tube to make the evaporator cold. The fan of the equipment blows indoor air from the evaporator, thereby blowing cold air. When the indoor temperature reaches or is lower than the user-set temperature, the control system controls the compressor to stop.

[0121] A fourth control unit, which starts the compressor and controls the fan of the equipment to run when the equipment runs in the heating mode and the environmental temperature is lower than the user-set temperature, and controls the compressor to stop when the equipment runs in the heating mode and the environmental temperature is higher than or equal to the user-set temperature;

[0122] Specifically, in the heating mode, when the ambient temperature is lower than the user set temperature, the control system controls the compressor to start, and the low-temperature and low-pressure refrigerant gas is sucked in, enters the condenser after compression, enters the evaporator through the throttling device, and realizes heating. At the same time, the fan of the device blows out hot air to improve the indoor temperature. When the ambient temperature reaches or exceeds the user set temperature, the control system controls the compressor to stop.

[0123] The fifth control unit starts the compressor when the device operates in the dehumidification mode and the ambient humidity is higher than the user set humidity, and controls the compressor to stop when the device operates in the dehumidification mode and the ambient humidity is lower than the user set humidity.

[0124] Specifically, in the dehumidification mode, when the ambient humidity is higher than the user set humidity, the control system controls the compressor to start, and the refrigerant is compressed into high-temperature and high-pressure gas, then sent to the condenser, and then enters the evaporator through the throttling device. At the same time, the water vapor in the air condenses into water on the surface of the evaporator and is discharged outdoors, thereby realizing the dehumidification effect. In the dehumidification mode, in order to enhance the dehumidification effect, the speed of the device fan is usually reduced. When the indoor humidity decreases to below the user set humidity, the control system controls the compressor to stop.

[0125] In the embodiment, in the case where the compressor does not overload, the environmental parameters are continuously obtained, compared with the user set parameters in real time, and the operating parameters are adjusted in time, so that the environmental parameters meet the user set parameters, and the user experience is improved.

[0126] In another optional solution, the third control unit, the fourth control unit and the fifth control unit each include:

[0127] The acquisition module acquires the evaporator temperature of the device;

[0128] The comparison module compares the size of the evaporator temperature and the preset evaporator temperature;

[0129] The reduction module reduces the speed of the fan when the evaporator temperature is lower than or equal to the preset evaporator temperature;

[0130] The improvement module increases the speed of the fan when the evaporator temperature is higher than the preset evaporator temperature.

[0131] In the embodiment, when the evaporator temperature is lower than or equal to the preset evaporator temperature, the rotating speed of the fan is reduced, so that the evaporator can be warmed up as soon as possible; when the evaporator temperature is higher than the preset evaporator temperature, the rotating speed of the fan is increased, so that the evaporator can be cooled faster. Adjusting the rotating speed of the fan according to the comparison result of the evaporator temperature and the preset evaporator temperature helps the evaporator to operate in a suitable temperature range, thereby ensuring the stability of the system.

[0132] In some examples of the present application, the device further comprises a sending unit configured to send a reminder message to the terminal when the compressor is overloaded, the reminder message indicating that the compressor is overloaded. In the embodiment, the user can be immediately notified by outputting the reminder message, so that the user can quickly understand the abnormal working state of the compressor and take corresponding measures. The overload information of the compressor contained in the reminder message can provide an important clue for subsequent fault diagnosis, help technicians quickly locate the problem, and improve the maintenance efficiency.

[0133] Specifically, the reminder message can be a shutdown prompt information, for example, a prompt information of "the system is currently working abnormally and will be shut down", which is used to prompt that the device will perform power-off or shutdown processing. The reminder message can also be a conversion prompt information, for example, an information of "the system is currently working abnormally and will be converted to a safe mode", which is used to prompt that the compressor of the device will be intervened.

[0134] The overload protection device of the compressor comprises a processor and a memory, the first control unit, the first determination unit and the second control unit are stored in the memory as program units, and the corresponding functions are realized by the processor executing the program units stored in the memory. The modules are located in the same processor; alternatively, the modules are located in different processors in any combination.

[0135] The processor comprises a core, and the core retrieves the corresponding program units from the memory. The core can be one or more, and the core parameters are adjusted to at least solve the problem that the existing device with a compressor has a high risk of pipe explosion.

[0136] The memory can include a non-permanent memory in a computer readable medium, a random access memory (RAM) and / or a non-volatile memory such as a read-only memory (ROM) or a flash memory (flash RAM), and the memory comprises at least one memory chip.

[0137] Embodiments of the present application provide an air conditioner, comprising one or more processors, a memory, and one or more programs, wherein the one or more programs are stored in the memory and configured to be executed by the one or more processors, and the one or more programs comprise any one of the methods. The processor implements at least the following steps when executing the program:

[0138] Step S201, in the case that the compressor of the device is overloaded, at least controlling the compressor to restart, and obtaining the number of times that the compressor is overloaded, wherein the device comprises at least one of an air conditioner and a dehumidifier;

[0139] Specifically, the air conditioner can be a fixed-frequency air conditioner.

[0140] Step S202, in the case that the number of times that the compressor is overloaded reaches a preset number of times, determining that the compressor is faulty;

[0141] Specifically, the preset number of times is a safety value of the number of times that the air conditioner allows the compressor to be overloaded, and is a parameter for determining whether the compressor is faulty. If it is determined that the number of times that the compressor is overloaded reaches the preset number of times, it is determined that the compressor is faulty.

[0142] Step S203, in the case that the compressor is faulty, at least controlling the compressor to stop.

[0143] Specifically, the compressor can be forced to stop working by disconnecting the AC contactor of the device. If the device is in a cooling mode, the indoor fan of the air conditioner is controlled to start; if the device is in a heating mode, the indoor fan of the device is controlled to stop.

[0144] Optionally, the at least controlling the compressor to stop comprises: determining that a time length of the device being in a first predetermined state after being powered on is a first duration, a time length of the device being in a second predetermined state after being powered on is a second duration, a time length of the compressor being in the second predetermined state after being restarted is a third duration, and a time length of the compressor being in the first predetermined state after being restarted is a fourth duration, the first predetermined state is a state in which a difference between an internal temperature of the device and an indoor evaporator coil temperature of the device is less than a first preset temperature, the second predetermined state is a state in which the difference is greater than a second preset temperature, and the second preset temperature is greater than the first preset temperature; determining whether a smaller one of the second duration and the third duration is greater than or equal to a preset threshold time; in a case where the smaller one is greater than or equal to the threshold time, controlling the compressor to run for a first predetermined time and then stop for a second predetermined time, the first predetermined time being a product of a running coefficient and the smaller one, the running coefficient being a preset coefficient, and the second predetermined time being a larger one of the first duration and the fourth duration; and in a case where the smaller one is less than the threshold time, controlling the device to shut down.

[0145] Optionally, before the at least controlling the compressor to restart, the method further comprises: in a case where the device is powered on, determining whether the first duration is greater than a preset time; in a case where the first duration is greater than the preset time, determining that the compressor is overloaded, and in a case where the first duration is less than or equal to the preset time, determining that the compressor is not overloaded.

[0146] Optionally, in a case where the compressor is overloaded, the at least controlling the compressor to restart comprises: in a case where the compressor is overloaded, controlling the compressor to stop; and in a case where a difference between an internal temperature of the device and an indoor evaporator coil temperature of the device is greater than or equal to a third preset temperature, controlling the stopped compressor to restart.

[0147] Optionally, in the case that the compressor does not overload, the method further comprises: obtaining an environmental parameter, the environmental parameter comprising an environmental temperature and an environmental humidity; comparing the environmental parameter with a user setting parameter, the user setting parameter comprising a user setting temperature and a user setting humidity; determining a working mode of the device according to a user setting working mode, the working mode comprising a cooling mode, a heating mode and a dehumidifying mode; in the case that the device operates in the cooling mode and the environmental temperature is higher than the user setting temperature, starting the compressor and controlling a fan of the device to operate; in the case that the device operates in the cooling mode and the environmental temperature is lower than or equal to the user setting temperature, controlling the compressor to stop; in the case that the device operates in the heating mode and the environmental temperature is lower than the user setting temperature, starting the compressor and controlling the fan to operate; in the case that the device operates in the dehumidifying mode and the environmental humidity is higher than the user setting humidity, starting the compressor; in the case that the device operates in the dehumidifying mode and the environmental humidity is lower than the user setting humidity, controlling the compressor to stop.

[0148] Optionally, the method further comprises: obtaining an evaporator temperature of the device; comparing the evaporator temperature with a preset evaporator temperature; in the case that the evaporator temperature is lower than or equal to the preset evaporator temperature, reducing a rotating speed of the fan; in the case that the evaporator temperature is higher than the preset evaporator temperature, increasing the rotating speed of the fan.

[0149] Optionally, the method further comprises: in the case that the compressor overloads, sending a reminding message to a terminal, the reminding message representing that the compressor has overloaded.

[0150] The device herein can be a server, a PC, a PAD, a mobile phone, etc.

[0151] Obviously, those skilled in the art should understand that the modules or steps of the present application can be realized by general computing devices, which can be centralized on a single computing device or distributed on a network composed of multiple computing devices, and can be realized by program codes executable by the computing devices, so that they can be stored in storage devices and executed by the computing devices, and in some cases, the steps shown or described herein can be executed in different orders, or they can be manufactured into individual integrated circuit modules or a single integrated circuit module. Therefore, the present application is not limited to any specific combination of hardware and software.

[0152] Those skilled in the art will appreciate that embodiments of the present application can be readily used as software, hardware, or a combination of software and hardware. In a typical configuration, a computing device includes one or more processors (CPUs), input / output interfaces, network interfaces, and memory.

[0153] The present application is described in reference to the flowchart illustrations and / or block diagrams according to the embodiments of the application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processing system, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart illustrations and / or block diagrams. Figure 1 one or more functions specified in the flowchart illustrations and / or block diagrams. Figure 1 means for carrying out one or more functions specified in the flowchart illustrations and / or block diagrams.

[0154] These computer program instructions can also be stored in a computer- readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instructions which implement the flowchart illustrations and / or block diagrams. Figure 1 one or more functions specified in the flowchart illustrations and / or block diagrams. Figure 1 means for carrying out one or more functions specified in the flowchart illustrations and / or block diagrams.

[0155] These computer program instructions can also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the flowchart illustrations and / or block diagrams. Figure 1 one or more functions specified in the flowchart illustrations and / or block diagrams. Figure 1 means for carrying out one or more functions specified in the flowchart illustrations and / or block diagrams.

[0156] In a typical configuration, a computing device includes one or more processors (CPUs), input / output interfaces, network interfaces, and memory.

[0157] The memory can include non-persistent memory, random access memory (RAM), and / or non-volatile memory, such as read only memory (ROM) or flash memory, among others. The memory is an example of computer-readable media.

[0158] Computer-readable media includes permanent and non-permanent, removable and non-removable media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technology, compact disc read-only memory (CD-ROM), digital versatile disc (DVD), or other optical storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other non-transmission medium that can be used to store information accessible to computing devices. According to the definition herein, computer-readable media does not include transitory media such as modulated data signals and carrier waves.

[0159] It should also be noted that the terms "comprising", "including", or any other variant thereof are intended to cover non-exclusive inclusion, so that processes, methods, articles or devices including a series of elements not only include those elements, but also include other elements not explicitly listed or inherent to such processes, methods, articles or devices. Without more limitations, the element defined by the statement "comprising a" does not exclude the presence of additional identical elements in the process, method, article or device including the element.

[0160] From the above description, it can be seen that the embodiments described in the present application achieve the following technical effects:

[0161] 1) The compressor overload protection control method of the present application first controls the compressor to restart and obtains the number of times of compressor overload; then determines that the compressor has a fault when the number of times of compressor overload reaches a preset number; finally, at least controls the compressor to stop in the case of determining that the compressor has a fault. The present application obtains the number of times of compressor overload, and intervenes in the start and stop of the compressor when the number of times of overload reaches the preset number, thereby avoiding the frequent start and stop of the compressor in a short time and reducing the risk of pipe explosion.

[0162] 2) The overload protection device of the compressor of the application controls the restart of the compressor through the first control unit and obtains the number of times of overload of the compressor; determines that the compressor has a fault through the first determination unit in the case that the number of times of overload of the compressor reaches a preset number; controls the shutdown of the compressor through the second control unit in the case that it is determined that the compressor has a fault. The application obtains the number of times of overload of the compressor, and intervenes in the start-stop control of the compressor when the number of times of overload reaches the preset number, thereby avoiding the frequent start-stop of the compressor in a short time and reducing the risk of pipe explosion.

[0163] The above merely describes the preferred embodiments of the application and is not intended to limit the application. Various modifications and changes can be made by those skilled in the art based on the spirit and principles of the application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the application shall be included in the protection scope of the application.

Claims

1. A control method for compressor overload protection, characterized in that, include: In the event of an overload in the compressor of the device, at least the compressor shall be restarted, and the number of times the compressor has been overloaded shall be obtained, wherein the device includes at least one of an air conditioner and a dehumidifier; If the compressor experiences overload a preset number of times, the compressor is determined to be faulty. In the event of a compressor malfunction, the duration of the device being in a first predetermined state after power-on is determined as a first duration, the duration of the device being in a second predetermined state after power-on is determined as a second duration, the duration of the compressor being in the second predetermined state after restarting is determined as a third duration, and the duration of the compressor being in the first predetermined state after restarting is determined as a fourth duration. The first predetermined state is a state where the difference between the internal temperature of the device and the temperature of the evaporator coil of the device's indoor unit is less than a first preset temperature, and the second predetermined state is a state where the difference is greater than a second preset temperature, wherein the second preset temperature is greater than the first preset temperature. Determine whether the smaller of the second duration and the third duration is greater than or equal to a preset threshold time; When the smaller value is greater than or equal to the threshold time, the compressor is controlled to run for a first predetermined time and then stop for a second predetermined time. The first predetermined time is the product of the running coefficient and the smaller value. The running coefficient is a preset coefficient. The second predetermined time is the larger value between the first duration and the fourth duration. If the smaller value is less than the threshold time, the device is controlled to shut down.

2. The method according to claim 1, characterized in that, Before at least controlling the compressor to restart, the method further includes: When the device is powered on and running, it is determined whether the first duration is greater than a preset time; If the first duration is greater than the preset time, it is determined that the compressor is overloaded; if the first duration is less than or equal to the preset time, it is determined that the compressor is not overloaded.

3. The method according to claim 1, characterized in that, The operating coefficient is less than 1.

4. The method according to claim 1, characterized in that, In the event of an overload, at least the compressor should be restarted, including: In the event of an overload, the compressor is controlled to shut down. If the difference between the internal temperature of the device and the temperature of the evaporator coil of the device's indoor unit is greater than or equal to a third preset temperature, the compressor that was shut down will be restarted.

5. The method according to any one of claims 1 to 4, characterized in that, If the compressor is not overloaded, the method further includes: Acquire environmental parameters, including ambient temperature and ambient humidity; The environmental parameters are compared with the user-defined parameters, which include the user-defined temperature and the user-defined humidity. The operating mode of the device is determined according to the operating mode set by the user, and the operating mode includes cooling mode, heating mode and dehumidification mode; When the device is operating in the cooling mode and the ambient temperature is higher than the user-set temperature, the compressor is started and the fan of the device is controlled to run; when the device is operating in the cooling mode and the ambient temperature is lower than or equal to the user-set temperature, the compressor is controlled to stop. When the device is operating in the heating mode and the ambient temperature is lower than the user-set temperature, the compressor is started and the fan is controlled to run; when the device is operating in the heating mode and the ambient temperature is higher than or equal to the user-set temperature, the compressor is controlled to stop. When the device is operating in the dehumidification mode and the ambient humidity is higher than the user-set humidity, the compressor is started; when the device is operating in the dehumidification mode and the ambient humidity is lower than the user-set humidity, the compressor is controlled to stop.

6. The method according to claim 5, characterized in that, Controlling the operation of the fan in the device includes: Obtain the evaporator temperature of the device; Compare the evaporator temperature with the preset evaporator temperature; If the evaporator temperature is lower than or equal to the preset evaporator temperature, reduce the fan speed; If the evaporator temperature is higher than the preset evaporator temperature, the fan speed is increased.

7. The method according to any one of claims 1 to 4, characterized in that, The method further includes: In the event of an overload, a notification message indicating that the compressor is overloaded is sent to the terminal.

8. An overload protection device for a compressor, characterized in that, include: A first control unit is configured to, in the event of an overload of the compressor in the device, at least restart the compressor and acquire the number of times the compressor has been overloaded, wherein the device includes at least one of an air conditioner and a dehumidifier; The determining unit is used to determine that the compressor has malfunctioned when the number of times the compressor has been overloaded reaches a preset number; The second control unit is used to at least shut down the compressor in the event of a compressor malfunction. The second control unit includes: The first determining module is used to determine the duration of the device being in a first predetermined state after being powered on as a first duration, the duration of the device being in a second predetermined state after being powered on as a second duration, the duration of the compressor being in the second predetermined state after restarting as a third duration, and the duration of the compressor being in the first predetermined state after restarting as a fourth duration. The first predetermined state is a state in which the difference between the internal temperature of the device and the temperature of the evaporator coil of the device's indoor unit is less than a first preset temperature. The second predetermined state is a state in which the difference is greater than a second preset temperature, and the second preset temperature is greater than the first preset temperature. The second determining module is used to determine whether the smaller value of the second duration and the third duration is greater than or equal to a preset threshold time. A first control module is configured to control the compressor to run for a first predetermined time and then stop for a second predetermined time when the smaller value is greater than or equal to the threshold time. The first predetermined time is the product of an operating coefficient and the smaller value, the operating coefficient is a preset coefficient, and the second predetermined time is the larger value between the first duration and the fourth duration. The second control module is used to control the device to shut down when the smaller value is less than the threshold time.

9. An air conditioner, characterized in that, include: One or more processors, a memory, and one or more programs, wherein the one or more programs are stored in the memory and configured to be executed by the one or more processors, the one or more programs comprising methods for performing any one of claims 1 to 7.

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