CN110779161A - Control method and device for compressor overload protection and air conditioner - Google Patents

Abstract

The present invention provides a control method, device, air conditioner and computer-readable storage medium for compressor overload protection, wherein the control method for compressor overload protection includes: obtaining the working current and working temperature of the compressor; When the current and the working temperature meet the first preset condition, the compressor is controlled to stop; when the compressor meets the second preset condition, the compressor is controlled to restart. The invention makes the compressor restart after being shut down under certain conditions, so as to avoid the abnormality of the parameters of the air conditioner caused by the long downtime without the built-in protection, thereby affecting the user's comfort, effectively reducing the occurrence of The probability of occurrence of built-in protection of the compressor is reduced, the operation stability of the air conditioner is improved, and the user's comfort level is improved.

Description

Compressor overload protection control method, device and air conditioner

technical field

The present invention relates to the technical field of refrigeration equipment, and in particular, to a control method and device for compressor overload protection, an air conditioner and a computer-readable storage medium.

Background technique

As the core component of the air conditioner, the compressor generally sets various protection functions in the air conditioner to ensure the safety of the compressor operation. A built-in protector will be added inside the compressor. The principle is to detect the working temperature and working current of the compressor. When the working current or/and the working temperature are too high, the built-in protector will be disconnected to disconnect the compressor circuit. Stop the compressor to ensure the safety of the compressor. After the working temperature returns to the recovery temperature of the built-in protector, the built-in protector is closed again, thereby allowing the compressor to be put into work again.

However, the compressor is often in a relatively sealed space, and its heat dissipation is slow. When the compressor has built-in protection, its working temperature needs to be reduced to the recovery temperature of the built-in protector, which usually takes a long time. When the compressor stops After a long period of time, the operating parameters of the air conditioner will be abnormal, thereby affecting its stability and reducing the user's comfort.

SUMMARY OF THE INVENTION

In view of this, the present invention aims to provide a compressor overload that can reduce the occurrence of built-in protection of the compressor under the premise of satisfying the reliable operation of the air conditioner, so as to improve the stability of the air conditioner, thereby improving the user's comfort. Protected control method, device, air conditioner, and computer-readable storage medium.

To this end, an aspect of the present invention provides a control method for compressor overload protection, which includes: acquiring the working current and working temperature of the compressor; when the working current and the working temperature satisfy a first preset condition , controlling the compressor to stop; when the compressor satisfies the second preset condition, controlling the compressor to restart.

In one aspect of the present invention, the compressor is turned on after being shut down under certain conditions, so as to avoid the abnormality of the parameters of the air conditioner caused by the long downtime without the built-in protection, thereby affecting the user's comfort. The occurrence of the situation effectively reduces the probability of the built-in protection of the compressor, improves the operation stability of the air conditioner, and improves the user's comfort.

In addition, in the control method for compressor overload protection involved in the present invention, optionally, it further includes: determining, according to the working current, the corresponding maximum protection temperature and Minimum protection temperature. Preferably, the first preset condition or the third preset condition is determined according to the maximum protection temperature and the minimum protection temperature. Usually, the built-in protector of the compressor has a current-temperature characteristic curve, such as the maximum f _max (I) and the minimum function f _min (I). Therefore, according to the detected operating current, the corresponding curve on the curve can be easily calculated The maximum protection temperature and minimum protection temperature of , so as to facilitate the determination of the first preset condition or the third preset condition.

In addition, in the control method for compressor overload protection according to the present invention, optionally, the first preset condition includes: the working current is greater than zero, and the working temperature satisfies T ₀ ≥T _a +T _s and T ₀ >(T _{max +} T _min )/2, where T ₀ represents the operating temperature, Ta represents the first set temperature, T _s represents the second set temperature, and T _max represents the maximum protection temperature , T _min represents the minimum protection temperature. . In this case, when the first preset condition is satisfied, it can be considered that the compressor is overloaded. Therefore, by controlling the compressor to stop and cool down, it can be prevented from continuing to work under the overload condition to prevent damage, and, After the second preset condition is met, the compressor is controlled to be turned on, which can further avoid the occurrence of abnormal parameters of the air conditioner caused by the long downtime without the built-in protection of the compressor, thereby affecting the user's comfort. It reduces the occurrence probability of compressor built-in protection, improves the operation stability of the air conditioner, and improves the user's comfort.

In addition, in the control method for compressor overload protection according to the present invention, optionally, it further includes: when the working current and the working temperature satisfy a third preset condition, controlling the load of the compressor to reduce . Therefore, when the compressor is overloaded, the heat absorption of the compressor can be reduced by reducing the load, thereby reducing its operating temperature, so as to effectively reduce the occurrence probability of built-in protection, improve the operation stability of the air conditioner, and improve the User comfort.

In addition, in the control method for compressor overload protection according to the present invention, optionally, the third preset condition includes: the working current is greater than zero, and the working temperature satisfies T ₀ ≥T _a +T _s and T _min ≦T ₀ ≦(T _{max +} T _min )/2, wherein T ₀ represents the operating temperature, Ta represents the first set temperature, T _s represents the second set temperature, and T _max represents the The maximum protection temperature, T _min represents the minimum protection temperature. According to the current-temperature characteristic curve of the built-in protector of the compressor, under the third preset condition, the occurrence probability of the built-in protection is low. Therefore, when the third preset condition is met, the compressor can be controlled to reduce the load and reduce its heat absorption, thereby reducing its working temperature, further reducing the probability of built-in protection, improving the stability of the air conditioner operation, and improving the user's comfort.

In addition, in the control method for compressor overload protection involved in the present invention, optionally, the specific implementation of controlling the load reduction of the compressor includes: opening an unloading valve of an air conditioner. In this way, the load of the compressor can be effectively reduced by opening the unloading valve, thereby effectively preventing the occurrence of built-in protection and improving the operation stability of the air conditioner.

In addition, in the control method for compressor overload protection according to the present invention, optionally, the specific implementation of controlling the load reduction of the compressor further includes: when the air conditioner is in a heating mode, controlling the air conditioner The rotation speed of the fan of the outdoor unit of the air conditioner is reduced; when the air conditioner is in the cooling mode, the rotation speed of the fan of the indoor unit of the air conditioner is controlled to be reduced. Therefore, by adjusting the rotation speed of the corresponding fan of the air conditioner, the heat absorption of the compressor can be effectively reduced, that is, the compressor load can be reduced, thereby effectively preventing the occurrence of built-in protection and improving the operation stability of the air conditioner.

In addition, in the control method for compressor overload protection according to the present invention, optionally, the first preset condition further includes: the working current is equal to zero, and the working temperature is greater than or equal to the first setting temperature. In this case, when the first preset condition is satisfied, it can be considered that the compressor is overloaded. Therefore, by controlling the compressor to stop and cool down, it can be prevented from continuing to work under the overload condition to prevent damage, and, After the second preset condition is met, the compressor is controlled to be turned on, which can further avoid the occurrence of abnormal parameters of the air conditioner caused by the long downtime without the built-in protection of the compressor, thereby affecting the user's comfort. It reduces the occurrence probability of compressor built-in protection, improves the operation stability of the air conditioner, and improves the user's comfort.

In addition, in the control method for compressor overload protection according to the present invention, optionally, the second preset condition includes: the shutdown time of the compressor reaches a preset time. As a result, the compressor can be restarted after the preset time of shutdown, so that the compressor can operate in a gap, so as to avoid the abnormality of the parameters of the air conditioner caused by the long shutdown time without the built-in protection of the compressor, thus affecting the use of users. The occurrence of comfort conditions effectively reduces the probability of the built-in protection of the compressor, improves the operating stability of the air conditioner, and improves the user's comfort.

In addition, in the control method for compressor overload protection involved in the present invention, optionally, it further includes: acquiring the cumulative number of times of continuous shutdown of the compressor; when the cumulative number of times is greater than or equal to a set number of times, generating the information about compressor overload protection faults. Preferably, the set number of times is 6 times. Under normal circumstances, when the compressor has built-in protection, it often takes a long time to stop, which will lead to abnormal operating parameters of the air conditioner. Abnormal commutation of the through valve, etc., which increases the difficulty of troubleshooting and maintenance of the air conditioner. Therefore, by monitoring the cumulative number of compressor shutdowns, when the cumulative shutdown reaches a certain number of times, the air conditioner can be controlled to issue a compressor overload. Protection fault information, that is, the compressor has built-in protection, so as to prevent the air conditioner from falsely reporting the built-in protection as other protection, so as to facilitate troubleshooting and reduce maintenance difficulty.

Another aspect of the present invention provides a control device for compressor overload protection, which includes: an acquisition unit for acquiring the working current and operating temperature of the compressor; and a control unit for when the working current and all the When the working temperature satisfies the first preset condition, the compressor is controlled to stop; the starting unit is configured to control the compressor to restart when the compressor satisfies the second preset condition.

Still another aspect of the present invention provides an air conditioner, comprising: a computer-readable storage medium storing a computer program and a processor, the computer program being read and executed by the processor, implementing any of the above The described control method for compressor overload protection.

Yet another aspect of the present invention provides a computer-readable storage medium, where a computer program is stored in the computer-readable storage medium, and when the computer program is read and executed by a processor, any one of the above-mentioned items is implemented. Compressor overload protection control method.

In the present invention, the control device for compressor overload protection, the air conditioner, and the computer-readable storage medium have the same advantages as the above-mentioned control method for compressor overload protection over the prior art, and are not described here. Repeat.

According to the present invention, under the premise of satisfying the reliable operation of the air conditioner, it can reduce the occurrence of the built-in protection of the compressor to improve the stability of the air conditioner, and can correctly detect the built-in protection of the compressor to avoid false alarms as Other protections are a control method, device, air conditioner and computer-readable storage medium for compressor overload protection that facilitate troubleshooting and reduce maintenance difficulty.

Description of drawings

The accompanying drawings constituting a part of the present invention are used to provide further understanding of the present invention, and the schematic 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 attached image:

1 is a schematic flowchart of a control method for compressor overload protection according to an embodiment of the present invention;

2 is a schematic diagram of the current detection wiring of the single-phase compressor according to the embodiment of the present invention;

3 is a schematic diagram of the current detection wiring of the three-phase compressor according to the embodiment of the present invention;

FIG. 4 is another schematic flowchart of the control method for compressor overload protection according to an embodiment of the present invention;

5 is a current-temperature characteristic curve diagram of the built-in protector of the compressor according to the embodiment of the present invention;

6 is a schematic structural diagram of a control device for compressor overload protection according to an embodiment of the present invention.

Description of reference numbers:

1- compressor, 2- current transformer, 3- built-in protector, 4- control device for compressor overload protection, 41- acquisition unit, 42- control unit, 43- start unit.

Detailed ways

It should be noted that the embodiments of the present invention and the features of the embodiments may be combined with each other without conflict.

The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

FIG. 1 is a schematic flowchart of a control method for compressor overload protection according to an embodiment of the present invention.

Referring to FIG. 1 , in this embodiment, the control method for compressor overload protection may include: step S100 : obtaining the working current and working temperature of the compressor 1 ; step S310 : when the working current and working temperature satisfy the first preset condition , control the compressor 1 to stop; step S400: when the compressor 1 meets the second preset condition, control the compressor 1 to restart.

In this embodiment, the compressor is turned on after being shut down under certain conditions, so as to avoid the situation where the air conditioner parameter is abnormal due to the long shutdown time without the built-in protection, thereby affecting the user's comfort. It can effectively reduce the occurrence probability of the built-in protection of the compressor, improve the operation stability of the air conditioner, and improve the user's comfort.

2 is a schematic diagram of the current detection wiring of the single-phase compressor according to the embodiment of the present invention, and FIG. 3 is a schematic diagram of the current detection wiring of the three-phase compressor according to the embodiment of the present invention.

In addition, in the present embodiment, in step S100: the operating current and operating temperature of the compressor 1 are detected, wherein the type of the compressor 1 is not particularly limited. In some examples, compressor 1 may be a single-phase compressor. In other examples, the compressor 1 may also be a three-phase compressor or the like. Therefore, different compressors can be set according to the needs of the air conditioner to meet different application requirements and the like.

In addition, in the present embodiment, in step S100, the method of detecting the operating current of the compressor 1 is not particularly limited, and for example, the operating current can be obtained by detecting with a current transformer or an ammeter. In some examples, for a single-phase compressor, referring to FIG. 2 , a current transformer 2 may be provided on the wiring line of the compressor 1 , and the current detected by the current transformer 2 is the working current of the compressor 1 . In other examples, for a three-phase compressor, referring to FIG. 3 , current transformers 2 , such as U and V phases or U, W phases, may be respectively provided on the lines of two phases of the three-phase power supply of the compressor 1 . The phases or V and W are equal, and the larger one of the currents detected by the two current transformers 2 is the working current of the compressor 1 . Thereby, the (maximum) operating current of the compressor can be obtained more accurately and conveniently.

In addition, in the present embodiment, the method of detecting the operating temperature of the compressor 1 in step S100 is not particularly limited. In some examples, a temperature sensor may be provided on the casing of the compressor 1 to detect the casing temperature of the compressor 1 , that is, the operating temperature of the compressor 1 . Thus, the operating temperature of the compressor can be obtained more conveniently.

FIG. 4 is another schematic flowchart of a control method for compressor overload protection according to an embodiment of the present invention.

4 , in this embodiment, the control method for compressor overload protection may further include: step S200 : determining the corresponding maximum protection temperature and minimum protection temperature of the built-in protector 3 of the compressor 1 under the working current according to the working current. Thus, the first preset condition or the third preset condition (described later) may be determined according to the maximum protection temperature and the minimum protection temperature.

5 is a current-temperature characteristic graph of the built-in protector of the compressor according to the embodiment of the present invention.

Normally, the built-in protector 3 of the compressor 1 has a current (I)-temperature (T) characteristic curve, as shown in FIG. 5 , from which the maximum protection action curve f _max (I) of the built-in protector 3 can be obtained and the minimum protection action curve f _min (I). When the operating current and operating temperature of the compressor 1, namely (I ₀ , T ₀ ) are below the curve f _min (I), the compressor 1 generally does not have built-in protection; when (I ₀ , T ₀ ) is located in the curve f When _max (I) is above, compressor 1 generally has built-in protection; when (I ₀ , T ₀ ) is between the curve f _min (I) and the curve f _max (I), that is, when the shaded area in Figure 5, The compressor 1 may have built-in protection, and the closer to the curve f _min (I), the lower the probability of built-in protection, and the closer to the curve f _max (I), the higher the probability of built-in protection.

In this embodiment, in step S200, the value of the operating current I ₀ is substituted into the maximum protection action curve f _max (I) and the minimum protection action curve f _min (I), and the maximum protection temperature and the minimum protection temperature can be calculated. . Here, the so-called maximum protection temperature is the numerical result T _max corresponding to f _max (I ₀ ), and the so-called minimum protection temperature is the numerical result T _min corresponding to f _min (I ₀ ). Therefore, according to the detected working current, the corresponding maximum protection temperature and minimum protection temperature on the curve can be easily calculated, so as to facilitate the determination of the first preset condition or the third preset condition.

In this embodiment, in step S310: when the working current and the working temperature satisfy the first preset condition, the compressor 1 is controlled to stop. In some examples, the first preset condition may include: the operating current is greater than zero, the operating temperature satisfies T ₀ ≥T _a +T _s and T ₀ >(T _max +T _min )/2, where T ₀ represents the operating temperature , _Ta represents the first set temperature, T _s represents the second set temperature, T _max represents the maximum protection temperature, and T _min represents the minimum protection temperature. In other examples, the first preset condition may further include: the working current is equal to zero, and the working temperature is greater than or equal to the first set temperature. In this case, when any of the above-mentioned first preset conditions are satisfied, the compressor can be considered to be overloaded. Therefore, by controlling the compressor to stop and cool down, it can be prevented from continuing to work under the overload condition. In order to prevent damage, and after the second preset condition is met, the compressor is controlled to be turned on, which can further avoid the abnormality of the parameters of the air conditioner caused by excessive downtime on the premise that the compressor does not have built-in protection, thus affecting the user's comfort. This effectively reduces the probability of the built-in protection of the compressor, improves the operating stability of the air conditioner, and improves the user's comfort.

In addition, in this embodiment, as mentioned above, T _a is a 1st preset temperature. The first set temperature _Ta may be the recovery temperature of the built-in protector 3 of the compressor 1 . Usually, when the working current of the compressor is too large or the working temperature is too high, the bimetallic sheet of the built-in protector will be disconnected due to thermal deformation, and the power supply of the compressor will be cut off. When the temperature is lowered, the bimetallic sheet can be Automatic reset. Therefore, the so-called recovery temperature refers to the corresponding temperature when the built-in protector 3 is disconnected due to the high temperature of the compressor 1, and the connection is reconnected. In some examples, the value of _Ta may be 50°C to 90°C, such as 55°C, 75°C, and 80°C. In other examples, the value of _Ta may be 60°C to 70°C, for example, 62°C, 65°C, and 68°C. Therefore, different recovery temperatures can be set according to different types or properties of the compressors, thereby determining different values of the first set temperature to meet different application requirements.

In addition, in the present embodiment, as described above, T _s is the second set temperature. The value of the second set temperature T _s is not particularly limited. In some examples, the value of T _s may be 5°C to 20°C, such as 8°C, 16°C, and 18°C. In other examples, the value of T _s may be 10°C to 15°C, for example, 11°C, 12°C, 13°C, and 14°C. Therefore, different second set temperatures can be set according to the heat dissipation of the compressor, that is, when the heat dissipation of the compressor is slow, a lower second set temperature can be set to ensure the heat dissipation efficiency. When the heat dissipation is fast, a higher second set temperature can be set, so as to prevent the temperature from decreasing in a short period of time, causing the compressor to start and stop too frequently.

In this embodiment, in step S400: when the compressor 1 satisfies the second preset condition, the compressor 1 is controlled to restart. In some examples, the second preset condition may include: the shutdown time of the compressor 1 reaches a preset time, wherein the value of the preset time is not particularly limited. In other examples, the preset time may be 3 min to 8 min, such as 4 min, 5 min, 6 min, and the like. In this way, the compressor can be controlled to be stopped for cooling for a certain period of time, and then restarted. Through the gap operation, the compressor can be put into the next operation faster.

In addition, in this embodiment, after the compressor 1 is restarted as described above, the detection and magnitude judgment of the working current and the working temperature of the compressor 1 are carried out. When the working temperature is less than or equal to the first set temperature, Then the normal operation of the compressor 1 can be maintained. In this way, the occurrence probability of built-in protection can be effectively reduced, and the operation stability of the air conditioner can be improved.

4 , in this embodiment, the control method for compressor overload protection may further include: Step S500 : obtaining the cumulative number of times of continuous shutdown of the compressor 1 ; when the cumulative number of times is greater than or equal to the set number of times, generate an overload of the compressor 1 Protection fault information. Here, the information about the overload protection failure refers to the information about the occurrence of built-in protection in the compressor. Under normal circumstances, when the compressor has built-in protection, it often takes a long time to stop, which will lead to abnormal operating parameters of the air conditioner. Abnormal commutation of the through valve, etc., which increases the difficulty of troubleshooting and maintenance of the air conditioner. Therefore, by monitoring the cumulative number of compressor shutdowns, when the cumulative shutdown reaches a certain number of times, the air conditioner can be controlled to issue a compressor overload. Protection fault information, that is, the compressor has built-in protection, so as to prevent the air conditioner from falsely reporting the built-in protection as other protection, so as to facilitate troubleshooting and reduce maintenance difficulty.

In addition, in this embodiment, there is no particular limitation on the way of sending out the overload protection fault information as described above. In some examples, the overload protection fault information can be sent out by means of flashing lights, sound reminders, and the like. Therefore, different guarantee methods can be set according to the design requirements of the air conditioner to meet the needs of different users or use environments.

In addition, in this embodiment, the value of the set number of times is not particularly limited. In some examples, the set number of times may be 5 to 9 times, such as 6 times, 7 times, or 8 times, and so on. Therefore, different setting times can be set according to different types of air conditioners, etc., to meet different application requirements and the like.

In this embodiment, referring to FIG. 4 , the control method for compressor overload protection may further include: Step S320 : when the working current and the working temperature satisfy the third preset condition, control the load of the compressor 1 to decrease. The specific implementation of controlling the load reduction of the compressor 1 is not particularly limited. In some examples, the specific implementation of controlling the load reduction of the compressor 1 may include opening the unloading valve of the air conditioner. In other examples, the specific implementation of controlling the load reduction of the compressor 1 may include: when the air conditioner is in the heating mode, controlling the rotational speed of the fan of the outdoor unit of the air conditioner to decrease; when the air conditioner is in the cooling mode, controlling the air conditioner The rotational speed of the fan of the indoor unit of the appliance decreases. In this case, by opening the unloading valve or adjusting the speed of the corresponding fan of the air conditioner, the heat absorption of the compressor can be effectively reduced, that is, the compressor load can be reduced, thereby effectively preventing the occurrence of built-in protection and improving The operation stability of the air conditioner, etc.

In this embodiment, in step S320, the third preset condition may include: the operating current is greater than zero, and the operating temperature satisfies T ₀ ≥T _a +T _s and T _min ≦T ₀ ≦(T _max +T _min )/ 2, where T ₀ represents the working temperature, _Ta represents the first set temperature, T _s represents the second set temperature, T _max represents the maximum protection temperature, and T _min represents the minimum protection temperature. According to the current-temperature characteristic curve of the built-in protector of the compressor, under the third preset condition, the occurrence probability of the built-in protection is low. Therefore, when the third preset condition is met, the compressor can be controlled to reduce the load and reduce its heat absorption, thereby reducing its operating temperature, further reducing the probability of built-in protection, improving the stability of the air conditioner operation, and improving the user's comfort.

In addition, in this embodiment, when the operating temperature of the compressor 1 is less than the sum of the first set temperature and the second set temperature, that is, when T ₀ <T _a +T _s , no processing is required, and the air conditioner is freed run. In general, when T ₀ <T _a +T _s , it can be T ₀ <T _a or a value close to the first set temperature T _a . In this case, even if the compressor has built-in protection, its The temperature can also be quickly reduced to the recovery temperature, so that the built-in protector can be restored and closed quickly, and the compressor can also be restored to work quickly, which will not affect the operation stability of the air conditioner, and it is not easy to cause false alarms. Wait for the situation to happen.

6 is a schematic structural diagram of a control device for compressor overload protection according to an embodiment of the present invention.

Referring to FIG. 6 , in this embodiment, the control device 4 for compressor overload protection may include: an obtaining unit 41 for obtaining the working current and working temperature of the compressor 1 , for obtaining the working current and the working temperature when the first preset value is satisfied. When the conditions are set, the control unit 42 for controlling the compressor 1 to stop, and the starting unit 43 for controlling the compressor 1 to restart when the compressor 1 satisfies the second preset condition.

In this embodiment, through the synergy of multiple units of the compressor overload protection control device, the compressor can be controlled to be restarted after being shut down under certain conditions, so as to avoid the excessive shutdown time on the premise that the built-in protection does not occur. Long-term causes abnormal parameters of the air conditioner, thereby affecting the user's comfort, effectively reducing the probability of the built-in protection of the compressor, improving the operating stability of the air conditioner, and improving the user's comfort.

In addition, in this embodiment, the control device 4 for compressor overload protection may further include: a calculation unit, which is configured to determine, according to the working current, the corresponding maximum protection temperature and minimum protection temperature of the built-in protector 3 of the compressor 1 under the working current temperature. Thus, the first preset condition or the third preset condition can be determined according to the maximum protection temperature and the minimum protection temperature.

In addition, in this embodiment, the control device 4 for compressor overload protection may further include: a fault reminder unit, which is used to obtain the cumulative number of times the compressor 1 has been shut down continuously, and when the cumulative number of times is greater than or equal to the set number of times, generate a Machine 1 overload protection fault information. Here, the information about the overload protection failure refers to the information about the occurrence of built-in protection in the compressor. Under normal circumstances, when the compressor has built-in protection, it often takes a long time to stop, which will lead to abnormal operating parameters of the air conditioner. Abnormal commutation of the through valve, etc., which increases the difficulty of troubleshooting and maintenance of the air conditioner. Therefore, by monitoring the cumulative number of compressor shutdowns, when the cumulative shutdown reaches a certain number of times, the air conditioner can be controlled to issue a compressor overload. Protection fault information, that is, the compressor has built-in protection, so as to prevent the air conditioner from falsely reporting the built-in protection as other protection, so as to facilitate troubleshooting and reduce maintenance difficulty.

In addition, in this embodiment, the control unit 42 of the compressor overload protection control device 4 can also be used to control the load of the compressor 1 to decrease when the working current and the working temperature satisfy the third preset condition. The specific implementation of controlling the load reduction of the compressor 1 is not particularly limited. In some examples, the specific implementation of controlling the load reduction of the compressor 1 may include opening the unloading valve of the air conditioner. In other examples, the specific implementation of controlling the load reduction of the compressor 1 may include: when the air conditioner is in the heating mode, controlling the rotational speed of the fan of the outdoor unit of the air conditioner to decrease; when the air conditioner is in the cooling mode, controlling the air conditioner The rotational speed of the fan of the indoor unit of the appliance decreases. In this case, by opening the unloading valve or adjusting the speed of the corresponding fan of the air conditioner, the heat absorption of the compressor can be effectively reduced, that is, the compressor load can be reduced, thereby effectively preventing the occurrence of built-in protection and improving The operation stability of the air conditioner, etc.

In this embodiment, an air conditioner is also disclosed, which includes: a computer-readable storage medium storing a computer program and a processor, wherein, when the computer program is read and run by the processor, it can realize any of the above The control method of compressor overload protection.

In this embodiment, a computer-readable storage medium storing a computer program is also disclosed. When the computer program is read and executed by a processor, any one of the above-mentioned control methods for compressor overload protection can be implemented. The form of the computer-readable storage medium is not particularly limited. In some examples, the computer-readable storage medium may be Random Access Memory (RAM), Read-Only Memory (ROM), Erasable Programmable Read Only Memory (Erasable Programmable Read Only Memory) , EPROM) or portable read-only memory (Compact Disc Read-Only Memory, CD-ROM), the computer-readable storage medium can be used to store related instructions and data.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made by any person skilled in the art within the spirit and principles of the present invention are should be included within the protection scope of the present invention.

Claims (13)

1. A method for controlling overload protection of a compressor, comprising:

acquiring the working current and the working temperature of the compressor (1);

when the working current and the working temperature meet a first preset condition, controlling the compressor (1) to stop;

and when the compressor (1) meets a second preset condition, controlling the compressor (1) to restart.

2. The control method of compressor overload protection according to claim 1, further comprising:

and determining the corresponding maximum protection temperature and minimum protection temperature of the built-in protector (3) of the compressor (1) under the working current according to the working current.

3. The control method of compressor overload protection according to claim 2, wherein the first preset condition includes: the working current is greater than zero, and the working temperature satisfies T ₀≥T _a+T _sAnd T ₀＞(T _max+T _min) /2, wherein, T ₀Denotes the operating temperature, T _aIndicating a first set temperature, T _sIndicating a second set temperature, T _maxRepresents the maximum protection temperature, T _minRepresenting the minimum protection temperature.

4. The control method of compressor overload protection according to claim 2, further comprising:

and when the working current and the working temperature meet a third preset condition, controlling the load of the compressor (1) to be reduced.

5. The control method of compressor overload protection according to claim 4, wherein the third preset condition includes: the working current is greater than zero, and the working temperature satisfies T ₀≥T _a+T _sAnd T _min≦T ₀≦(T _max+T _min) /2, wherein, T ₀Denotes the operating temperature, T _aIndicating a first set temperature, T _sIndicating a second set temperature, T _maxRepresents the maximum protection temperature, T _minRepresenting the minimum protection temperature.

6. A control method of compressor overload protection according to claim 4, characterized in that said specific implementation of controlling the load reduction of the compressor (1) comprises:

the unloading valve of the air conditioner is opened.

7. A control method of compressor overload protection according to claim 4, characterized in that said specific realisation of controlling the load reduction of the compressor (1) further comprises:

when the air conditioner is in a heating mode, controlling the rotating speed of a fan of an outdoor unit of the air conditioner to be reduced;

and when the air conditioner is in a refrigeration mode, controlling the rotating speed of a fan of an indoor unit of the air conditioner to be reduced.

8. The control method of compressor overload protection according to claim 3, wherein the first preset condition further comprises: the working current is equal to zero, and the working temperature is greater than or equal to the first set temperature.

9. The control method of compressor overload protection according to claim 1, wherein the second preset condition includes: the shutdown time of the compressor (1) reaches a preset time.

10. The control method of compressor overload protection according to claim 1, further comprising:

acquiring the accumulated times of continuous shutdown of the compressor (1);

and when the accumulated times is greater than or equal to the set times, generating information of the overload protection fault of the compressor (1).

11. A control device (4) for overload protection of a compressor, characterized by comprising:

an acquisition unit (41) for acquiring an operating current and an operating temperature of the compressor (1);

a control unit (42) for controlling the compressor (1) to stop when the operating current and the operating temperature satisfy a first preset condition;

a starting unit (43) for controlling the compressor (1) to restart when the compressor (1) meets a second preset condition.

12. An air conditioner, comprising:

a computer-readable storage medium and a processor storing a computer program which, when read and executed by the processor, implements the control method of compressor overload protection according to any one of claims 1 to 10.

13. A computer-readable storage medium, characterized in that it stores a computer program which, when read and executed by a processor, implements the control method of compressor overload protection according to any one of claims 1 to 10.

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