Overload protection control method and device, air conditioner and medium

Abstract

The invention discloses an overload protection control method and device, an air conditioner and a medium. The method comprises the steps that the first continuous operation duration, the overload protection current and the currently accumulated first overload protection frequency of a compressor before overload protection of the compressor last time are determined; when the first overload protection frequency is larger than a first frequency threshold value, the current first current, the second continuous operation duration and the first temperature difference of the compressor are determined; when the condition that the first current is larger than the first reference value and the condition that the second continuous operation duration is larger than or equal to the second reference value are not met, or the condition that the first temperature difference is smaller than a preset first difference threshold value is not met, the overload protection current is updated. According to the method, the occurrence trend of overload protection is judged based on the overload protection times, the current first current of the compressor, the first continuous operation duration and other information, the overload protection current is updated based on the occurrence trend, triggering of part of unnecessary overload protection is avoided, and the overload protection times of the compressor are reduced.

Description

Technical Field

[0001] This application relates to, but is not limited to, the technical field of air conditioners, and particularly relates to an overload protection control method, device, air conditioner, and medium. Background Art

[0002] The compressor of an air conditioner is usually provided with an overload protection mechanism. When the air conditioner operates at a high load for a long time, causing the compressor to overheat, the overload protection will be triggered, and the compressor will stop running. After the temperature of the compressor cools down to the normal range, the compressor can resume operation. However, the compressor requires a long time to cool down. Therefore, the recovery time of the compressor overload protection is relatively long. If the overload protection is frequently triggered, causing the compressor to start and stop frequently or restart after a long shutdown, it will increase the energy consumption of the air conditioner and affect the performance of the air conditioner. Summary of the Invention

[0003] Embodiments of this application provide an overload protection control method, device, air conditioner, and medium, which can effectively reduce the number of overload protections of the compressor, thereby improving the performance of the air conditioner.

[0004] In a first aspect, embodiments of this application provide an overload protection control method applied to an air conditioner, where the air conditioner includes a compressor, and the method includes:

[0005] Determine the first continuous operation duration, overload protection current, and current cumulative first overload protection times of the compressor before the previous overload protection of the compressor, where the overload protection current is the maximum stable current within the first continuous operation duration;

[0006] When the first overload protection times are greater than a first number threshold, determine the current first current, second continuous operation duration, and first temperature difference of the compressor, where the first temperature difference is the difference between the indoor temperature corresponding to the current air conditioner and the user-set temperature;

[0007] Generate a target condition based on the first current, the overload protection current, the second continuous operation duration, the first continuous operation duration, and the first temperature difference. When the target condition is not met, update the overload protection current, where the target condition is used to indicate that the first current is greater than a first reference value, and the second continuous operation duration is greater than or equal to a second reference value, or the first temperature difference is less than a preset first difference threshold. The first reference value is the difference between the current overload protection current and a first product, where the first product is the product obtained by multiplying the current overload protection current by a first preset value. The second reference value is the difference between the first continuous operation duration and a second preset value.

[0008] In some embodiments, the first overload protection count is determined according to the following steps:

[0009] When it is detected that the compressor has an overload protection, determine the second temperature difference within the continuous operation duration before the compressor triggers the overload protection, where the second temperature difference is the difference between the indoor temperature corresponding to the air conditioner and the user-set temperature;

[0010] When the second temperature difference is less than a preset second difference threshold, increment the current first overload protection count by 1;

[0011] When the second temperature difference is greater than or equal to the second difference threshold, clear the currently accumulated first overload protection count.

[0012] In some embodiments, the overload protection control method of the embodiments of the present application further includes:

[0013] When the first overload protection count is less than or equal to the first count threshold and the compressor overload protection ends and resumes operation, re-detect whether the compressor has an overload protection;

[0014] When it is detected that the compressor has an overload protection, re-determine the new second temperature difference within the continuous operation duration before the compressor triggers the overload protection. When the new second temperature difference is less than the second difference threshold, clear the currently accumulated first overload protection count. When the new second temperature difference is greater than or equal to the second difference threshold, increment the current first overload protection count by 1.

[0015] In some embodiments, the overload protection control method of the embodiments of the present application further includes:

[0016] When the first overload protection count is less than or equal to the first count threshold and the compressor overload protection ends and resumes operation, re-detect whether the compressor has an overload protection;

[0017] When it is detected that the compressor has an overload protection, re-determine the new second temperature difference within the continuous operation duration before the compressor triggers the overload protection. When the new second temperature difference is less than the second difference threshold, increment the current first overload protection count by 1. When the new second temperature difference is greater than or equal to the second difference threshold, clear the currently accumulated first overload protection count.

[0018] In some embodiments, when the target condition is not satisfied, updating the overload protection current includes:

[0019] When the target condition is not satisfied, detect whether the compressor enters overload protection;

[0020] When the compressor enters overload protection, update the current overload protection current to the third reference value, record the number of times of overload protection occurred by the compressor again as the second overload protection times, and increase the current second overload protection times by 1, where the third reference value is the difference between the second product and the current overload protection current, and the second product is the product of the current overload protection current and the first preset value;

[0021] When the compressor does not enter overload protection and the compressor enters temperature-reached shutdown protection, update the current overload protection current to the fourth reference value, where the fourth reference value is the sum value of the second product and the current overload protection current.

[0022] In some embodiments, the overload protection control method of the embodiments of the present application further includes: controlling the compressor to enter temperature-reached shutdown protection when the target condition is met.

[0023] In some embodiments, the overload protection control method of the embodiments of the present application further includes: when the second overload protection times is greater than or equal to the second number threshold, after the overload protection of the compressor ends and the compressor resumes operation, detect the comparison relationship between the first current and the first reference value in real time;

[0024] When the first current is greater than or equal to the first reference value, control the compressor to enter overcurrent protection.

[0025] In some embodiments, after controlling the compressor to enter overcurrent protection, the method further includes:

[0026] Clear the second overload protection times;

[0027] After the overcurrent protection of the compressor ends and the compressor resumes operation, re-determine the first overload protection times. When the first overload protection times is greater than the first number threshold, re-determine the current first current, the second continuous operation duration, the first continuous operation duration of the compressor before the last overload protection occurred by the compressor, the overload protection current, and the first temperature difference of the compressor, and re-generate a new target condition based on the first current, the overload protection current, the second continuous operation duration, the first continuous operation duration, and the first temperature difference. When the new target condition is not met, update the overload protection current.

[0028] In a second aspect, an embodiment of the present application provides a control device, including at least one control processor and a memory communicatively connected to the at least one control processor; the memory stores instructions executable by the at least one control processor, and when the instructions are executed by the at least one control processor, the at least one control processor is enabled to execute the overload protection control method as described in the first aspect.

[0029] In a third aspect, an embodiment of the present application further provides an air conditioner, including the control device of the second aspect.

[0030] In a fourth aspect, an embodiment of the present application further provides a computer-readable storage medium storing computer-executable instructions for executing the overload protection control method as described in the first aspect.

[0031] An embodiment of the present application provides an overload protection control method, device, air conditioner, and medium. The method includes: determining a first continuous operation duration, an overload protection current, and a currently accumulated first overload protection count of the compressor before the compressor last experienced overload protection, where the overload protection current is the maximum stable current within the first continuous operation duration; when the first overload protection count is greater than a first count threshold, determining a first current, a second continuous operation duration, and a first temperature difference of the compressor currently, where the first temperature difference is the difference between the indoor temperature corresponding to the air conditioner currently and the user-set temperature; generating a target condition based on the first current, the overload protection current, the second continuous operation duration, the first continuous operation duration, and the first temperature difference, and when the target condition is not satisfied, updating the overload protection current, where the target condition is used to indicate that the first current is greater than a first reference value, and the second continuous operation duration is greater than or equal to a second reference value, or the first temperature difference is less than a preset first difference threshold, the first reference value is the difference between the current overload protection current and a first product, and the first product is the product obtained by multiplying the current overload protection current by a first preset value, and the second reference value is the difference between the first continuous operation duration and a second preset value. Since the overload protection current is a determining factor for controlling whether the compressor enters overload protection, the present application determines the occurrence trend of overload protection based on information such as the overload protection count, the first current of the compressor currently, the first continuous operation duration of the compressor before the compressor last experienced overload protection, the overload protection current, the current continuous operation duration of the compressor, and the first temperature difference, and updates the overload protection current of the compressor based on the occurrence trend, which can avoid triggering some unnecessary overload protections in advance, thereby effectively reducing the overload protection count of the compressor, and thus improving the performance of the air conditioner. Description of the Drawings

[0032] Figure 1 It is a flowchart of the steps of an overload protection control method provided by an embodiment of the present application;

[0033] Figure 2 It is a structural diagram of a control device provided by another embodiment of the present application;

[0034] Figure 3 It is a schematic diagram of an overload protection control method provided by another embodiment of the present application. Detailed implementation manners

[0035] In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0036] It can be understood that although functional module division is performed in the device schematic diagram and the logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in a different order from the module division in the device or the order in the flowchart. Terms such as "first", "second", etc. in the specification, claims or the above-mentioned drawings are used to distinguish similar objects and do not necessarily need to describe a specific order or sequence.

[0037] The compressor of an air conditioner is usually provided with an overload protection mechanism. When the air conditioner runs at a high load for a long time and causes the compressor to overheat, the overload protection will be triggered, and the compressor will stop running. After the temperature of the compressor cools down to the normal range, the compressor can resume running. However, the compressor requires a long time to cool down. Therefore, the recovery time of the compressor overload protection is relatively long. If the overload protection is triggered frequently, causing the compressor to start and stop frequently or restart after a long time of shutdown, it will increase the energy consumption of the air conditioner and affect the performance of the air conditioner.

[0038] To solve the above problems, an embodiment of the present application provides an overload protection control method, device, air conditioner, and medium. The method includes: determining the first continuous operation duration, overload protection current, and the currently accumulated first overload protection times of the compressor before the compressor had an overload protection last time, where the overload protection current is the maximum stable current within the first continuous operation duration; when the first overload protection times is greater than the first number threshold, determining the current first current, second continuous operation duration, and first temperature difference of the compressor, where the first temperature difference is the difference between the indoor temperature corresponding to the current air conditioner and the user-set temperature; generating a target condition based on the first current, the overload protection current, the second continuous operation duration, the first continuous operation duration, and the first temperature difference, and updating the overload protection current when the target condition is not met, where the target condition is used to indicate that the first current is greater than the first reference value, and the second continuous operation duration is greater than or equal to the second reference value, or the first temperature difference is less than a preset first difference threshold, the first reference value is the difference between the current overload protection current and the first product, and the first product is the product obtained by multiplying the current overload protection current by a first preset value, and the second reference value is the difference between the first continuous operation duration and a second preset value. Since the overload protection current is the decisive factor for controlling whether the compressor enters overload protection, the present application judges the occurrence trend of overload protection based on information such as the overload protection times, the current first current of the compressor, the first continuous operation duration of the compressor before the compressor had an overload protection last time, the overload protection current, the current continuous operation duration of the compressor, and the first temperature difference, and updates the overload protection current of the compressor based on the occurrence trend, which can avoid the triggering of some unnecessary overload protections in advance, thereby effectively reducing the overload protection times of the compressor, protecting the compressor, and improving the performance of the air conditioner.

[0039] The following further elaborates on the embodiments of the present application with reference to the drawings.

[0040] Reference Figure 1 , Figure 1 is the step flow chart of the overload protection control method provided by an embodiment of the present application. An embodiment of the present application provides an overload protection control method, which is applied to an air conditioner. The air conditioner includes a compressor. The method includes but is not limited to the following steps:

[0041] Step S10, determining the first continuous operation duration, overload protection current, and the currently accumulated first overload protection times of the compressor before the compressor had an overload protection last time, where the overload protection current is the maximum stable current within the first continuous operation duration.

[0042] Specifically, the overload protection current is the determining factor for controlling whether the compressor enters the overload protection. When it is detected that the current first current of the compressor reaches the overload protection current, the overload protection is triggered and controlled by the air conditioner through the overload protector. The overload protection current in this embodiment is the maximum stable current within the first continuous operation duration before the last overload protection of the compressor occurred. The maximum stable current means that the compressor current remains stable around a certain current value for a period of time, and the floating value up and down can be 0.5A.

[0043] It can be understood that determining the first continuous operation duration of the compressor, the overload protection current, and the currently accumulated first overload protection times before the last overload protection of the compressor can know the operation state information of the compressor when the overload protection occurs. Thus, after the overload protection of the compressor ends and resumes operation, it is possible to combine the current operation state information of the compressor (such as the current first current and the second continuous operation duration) to judge the occurrence trend of the current overload protection, providing an effective data basis for adjusting the overload protection current of the compressor subsequently to avoid the triggering of some unnecessary overload protections in advance.

[0044] Specifically, in some embodiments, Figure 1 The determination method of the first overload protection times in step S10 includes but is not limited to the following steps:

[0045] Step S11, when it is detected that the compressor has an overload protection, determine the second temperature difference within the continuous operation duration before the compressor triggers the overload protection. Among them, the second temperature difference is the difference between the indoor temperature corresponding to the air conditioner and the user-set temperature;

[0046] Step S12, when the second temperature difference is less than the preset second difference threshold, increase the current first overload protection times by 1;

[0047] Step S13, when the second temperature difference is greater than or equal to the second difference threshold, clear the currently accumulated first overload protection times.

[0048] Specifically, those skilled in the art can determine the second difference threshold according to the actual situation. The second difference threshold in this embodiment is 2.

[0049] Specifically, the first overload protection times records the number of overload protections triggered by the compressor due to excessive current or temperature, and is an intuitive indicator for judging whether the operation state of the compressor is abnormal.

[0050] It can be understood that the second temperature difference in this embodiment is the difference between the indoor temperature corresponding to the air conditioner and the user-set temperature during the continuous operation duration before the compressor has an overload protection. By comparing the relationship between the second temperature difference value and the second difference threshold, it is possible to detect whether the indoor temperature is close to the user-set temperature. Based on the conclusion of whether the indoor temperature is close to the user-set temperature, the reason for the compressor to have an overload protection can be distinguished.

[0051] In this embodiment, first enter the first overload protection mode to detect whether the compressor has an overload protection. When the compressor has an overload protection, determine the second temperature difference during the continuous operation duration before the compressor triggers the overload protection, and determine the comparison relationship between the second temperature difference and the second difference threshold. When the second temperature difference is less than the preset second difference threshold, it indicates that before the overload protection, the indoor temperature has been close to the user-set temperature. In this case, the overload protection is caused by the compressor running at a high load for a long time, which is a problem of the compressor itself. Increase the current first overload protection count by 1 and record it as the first overload protection count; when the second temperature difference is greater than or equal to the second difference threshold, it means that before the overload protection, there is still a large gap between the indoor temperature and the user-set temperature. In this case, the overload protection may be caused by system control logic or external environmental factors (such as poor heat dissipation, voltage fluctuation, etc.), rather than the operation problem of the compressor itself. Clear the currently accumulated first overload protection count to avoid misjudgment and be able to re-evaluate the compressor operation status. Since this embodiment reduces the mis-triggering of the overload protection by updating the overload protection current, entering the overcurrent protection in advance or reaching the temperature shutdown protection, thereby reducing the overload protection count. However, if the trigger reason for the overload protection is caused by external factors other than the compressor itself, these operations cannot eliminate the influence of external factors. Thus, by combining data such as the continuous operation duration and temperature difference of the compressor to judge the cause of each overload protection, whether it is the compressor itself or external factors, so that the accumulated first overload protection count in this embodiment is the overload protection count caused by the compressor itself, providing effective support for determining the specific timing of updating the overload protection current, entering the overcurrent protection in advance or reaching the temperature shutdown protection.

[0052] Step S20, when the first overload protection count is greater than the first count threshold, determine the current first current, second continuous operation duration, and first temperature difference of the compressor, where the first temperature difference is the difference between the indoor temperature corresponding to the current air conditioner and the user-set temperature.

[0053] Specifically, the first count threshold can be determined by those skilled in the art according to the actual situation. In this embodiment, the value of the first count threshold is 3.

[0054] It can be understood that when the first overload protection count is greater than the first count threshold, it indicates the possibility that the current overload protection current setting is too low, resulting in the compressor frequently entering the protection state. Refer to Figure 3 , and currently enter the second overload protection mode. Specifically, it is also necessary to combine the current first current, second continuous operation duration, and first temperature difference of the compressor to determine whether to adjust and update the overload protection current.

[0055] In addition, the overload protection control method of the embodiments of the present application further includes but is not limited to the following steps:

[0056] Step S21, when the first overload protection count is less than or equal to the first count threshold, and after the compressor overload protection ends and resumes operation, re-detect whether the compressor has an overload protection;

[0057] Step S22, when it is detected that the compressor has an overload protection, re-determine the new second temperature difference within the continuous operation duration before the compressor triggers the overload protection. When the new second temperature difference is less than the second difference threshold, increase the current first overload protection count by 1. When the new second temperature difference is greater than or equal to the second difference threshold, clear the currently accumulated first overload protection count.

[0058] It can be understood that when the first overload protection count is less than or equal to the first count threshold, and after the compressor overload protection ends and resumes operation, it indicates that the current parameters of the compressor can handle most working conditions and no intervention operation is required. Refer to Figure 3 , at this time, re-detect whether the compressor has an overload protection, and when it is detected that the compressor has an overload protection, re-determine the new second temperature difference within the continuous operation duration before the compressor triggers the overload protection. When the new second temperature difference is less than the second difference threshold, increase the current first overload protection count by 1. When the new second temperature difference is greater than or equal to the second difference threshold, clear the currently accumulated first overload protection count, until the accumulated first overload protection count reaches the first count threshold and then perform the next intervention operation to avoid over-optimization.

[0059] Step S30, generate a target condition based on the first current, overload protection current, second continuous operation duration, first continuous operation duration, and first temperature difference. When the target condition is not met, update the overload protection current, where the target condition is used to indicate that the first current is greater than the first reference value, and the second continuous operation duration is greater than or equal to the second reference value, or the first temperature difference is less than the preset first difference threshold. The first reference value is the difference between the current overload protection current and the first product, and the first product is the product obtained by multiplying the current overload protection current by the first preset value. The second reference value is the difference between the first continuous operation duration and the second preset value.

[0060] It can be understood that the target conditions of this embodiment are used to indicate that the first current I of the current compressor is greater than the first reference value, and the second continuous operation duration T3 satisfies T3≥the second reference value, or the first temperature difference R1 is less than the preset first difference threshold C. Among them, the first reference value is the current overload protection current I 过载 and the first product (i.e., the product obtained by multiplying the current overload protection current I 过载 by the first preset value k), the second reference value is the difference between the first continuous operation duration T2 and the second preset value B, that is, the target condition is to satisfy I>I 过载 -k*I 过载 , and R1<C or T3>T2-B. That is, the target condition considers whether the current first current is close to the overload protection current, whether the current air-conditioning refrigeration effect meets the standard (when R1<C, it means that the current air-conditioning refrigeration effect meets the standard, and when R1≥C, it means that the current air-conditioning refrigeration effect does not meet the standard), and whether the current second continuous operation duration T3 is close to the first continuous operation duration T2 of the previous overload protection. Combining the descriptions of the above embodiments, after the cumulative first overload protection times reach the first number threshold, this embodiment combines the three relevant factors of the compressor operation state involved in determining whether the compressor meets the target conditions, and can judge the occurrence trend of the overload protection, so as to judge the timing of updating the overload protection current (when the target conditions are not met, update the overload protection current). In this way, the overload protection current of the compressor can be updated based on the occurrence trend of the overload protection, and some unnecessary overload protection triggers can be avoided in advance, so as to effectively reduce the overload protection times of the compressor, protect the compressor, and thus improve the performance of the air conditioner.

[0061] Specifically, in some embodiments, Figure 1 In the case of not meeting the target conditions in step S30, updating the overload protection current includes but is not limited to the following steps:

[0062] Step S31, when the target conditions are not met, detect whether the compressor enters overload protection;

[0063] Step S32, when the compressor enters overload protection, update the current overload protection current to the third reference value, re-record the overload protection times of the compressor as the second overload protection times, and increase the current second overload protection times by 1. Among them, the third reference value is the difference between the second product and the current overload protection current, and the second product is the product of the current overload protection current and the first preset value;

[0064] Step S33, when the compressor does not enter overload protection and the compressor enters temperature-reached shutdown protection, update the current overload protection current to the fourth reference value. Among them, the fourth reference value is the sum value of the second product and the current overload protection current.

[0065] It can be understood that if the target conditions are not met, that is, the current first current is not close to the overload threshold, the current second continuous operation duration is not close to the first continuous operation duration before the historical overload protection, or the current air-conditioning cooling effect does not meet the standard. If the compressor still enters the overload protection at this time, it means that the current overload protection current setting is too high and the overload protection current needs to be lowered. The method of lowering and updating the overload protection current in this embodiment is to update the current overload protection current to a third reference value, that is, to implement according to the following formula: I 过载x = I 过载x-1 - k * I 过载x-1 , where I 过载x is the updated overload protection current, I 过载x-1 is the overload protection current before the update, k is the first preset value, and the first preset value takes 0.1 in this embodiment; in addition, under the condition that the target conditions are not met, if the compressor does not enter the overload protection and the compressor enters the temperature-reached shutdown protection, it means that the current overload protection current setting is too low, and the overload protection current needs to be increased according to the formula I 过载x = I 过载x-1 - k * I 过载x-1 . In this way, the overload protection current can be dynamically adjusted based on the compressor state corresponding to the historical overload protection and combined with the real-time operation state of the current compressor, so that the adjusted overload protection current is closer to the actual safe operation upper limit of the compressor, thereby effectively avoiding frequent entry into the overload protection and waste of air-conditioning performance caused by too low an overload protection current setting, or potential safety hazards caused by too high an overload protection current.

[0066] In addition, in some embodiments, the overload protection control method of this embodiment further includes but is not limited to the following steps:

[0067] Step S41, when the target conditions are met, control the compressor to enter the temperature-reached shutdown protection.

[0068] It can be understood that when the target conditions are met, it means that the current indoor temperature has basically reached the user-set temperature, the first current of the compressor is about to reach the overload protection current, and the current second continuous operation duration of the compressor is close to the first continuous operation duration before the last compressor overload protection. In order to prevent the compressor from continuously operating at a high load and entering the overload protection and protect the compressor, this embodiment controls the compressor to enter the temperature-reached shutdown protection. After the protection ends, the number of overload protections is effectively reduced.

[0069] In addition, in some embodiments, the overload protection control method of this embodiment further includes but is not limited to the following steps:

[0070] Step S42: When the second overload protection count is greater than or equal to the second count threshold, after the compressor overload protection ends and resumes operation, the comparison relationship between the first current and the first reference value is detected in real time;

[0071] Step S43: When the first current is greater than or equal to the first reference value, control the compressor to enter overcurrent protection.

[0072] Specifically, the second count threshold in this embodiment takes a value of 2, and those skilled in the art can determine it according to the actual situation.

[0073] Specifically, referring to the description of the above embodiment, after determining that the target condition is not met, the second overload protection count that occurs to the compressor is re-recorded in this embodiment, and it can be judged whether the strategy of adjusting the overload protection current meets the air-conditioning performance requirements. When the second overload protection count is less than the second count threshold, after the overload protection ends, return to the first step of the second overload protection mode to continue running, that is, re-judge whether the current operating state of the compressor meets the target condition, and update the overload protection current or control the compressor to enter the temperature-reached protection and other intervention operations based on the judgment result again; when the second overload protection count is greater than or equal to the second count threshold, it means that the current strategy of adjusting the overload protection current no longer meets the performance requirements of the air conditioner. After the compressor overload protection ends and resumes operation, the comparison relationship between the first current and the first reference value is detected in real time. When the first current is greater than or equal to the first reference value, it means that the current current of the compressor is already close to the overload protection current, and control the compressor to enter overcurrent protection. It can be understood that the recovery duration of overcurrent protection is less than that of overload protection, and the impact on the air-conditioning performance is relatively small. In this case, this embodiment controls to enter overcurrent protection in advance to avoid entering overload protection, and can effectively reduce the number of overload protections.

[0074] In addition, in some embodiments, after performing step S43, the overload protection control method provided by the embodiments of the present application further includes but is not limited to the following steps:

[0075] Step S44: Clear the second overload protection count;

[0076] Step S45: After the compressor overcurrent protection ends and resumes operation, re-determine the first overload protection count. When the first overload protection count is greater than the first count threshold, re-determine the current first current, the second continuous operation duration, the first continuous operation duration of the compressor before the last overload protection occurred to the compressor, the overload protection current, and the first temperature difference of the compressor, and generate a new target condition based on the first current, the overload protection current, the second continuous operation duration, the first continuous operation duration, and the first temperature difference again. When the new target condition is not met, update the overload protection current.

[0077] It can be understood that after performing step S43, that is, when the first current is greater than or equal to the first reference value and the compressor is controlled to enter the overcurrent protection, the current cumulative number of second overload protection times in this embodiment is cleared. After the overcurrent protection of the compressor ends and it resumes operation, as Figure 3 shown, it re-enters the first overload protection mode, that is, re-determines the number of first overload protection times. When the number of first overload protection times is greater than the first number threshold, it re-determines the current first current of the compressor, the second continuous operation duration, the first continuous operation duration of the compressor before the previous overload protection occurred, the overload protection current, and the first temperature difference. It re-generates new target conditions based on the first current, the overload protection current, the second continuous operation duration, the first continuous operation duration, and the first temperature difference. When the new target conditions are not met, it updates the overload protection current. Referring to the description of the above embodiment, after the overcurrent protection ends and the compressor resumes operation, the operation parameter indicators such as the first current of the compressor will return to the normal range. In this case, it re-enters the first overload protection mode to form a cycle, so as to be able to consider various situations that may cause overload protection during the operation of the compressor. For different situations, the method of this embodiment (adjusting the overload protection current or entering the overcurrent protection, or entering the temperature-reached shutdown protection) is used to avoid the triggering of some unnecessary overload protections in advance, thereby effectively reducing the number of overload protections of the compressor, protecting the compressor, and thus improving the performance of the air conditioner.

[0078] In addition, in order to describe the overload protection control method provided in this application in more detail, the technical solution of this application will be described below with a specific example.

[0079] Refer to Figure 3 , Figure 3 which is a schematic diagram of an overload protection control method provided by another embodiment of this application. This overload protection control method includes the following steps:

[0080] Step S301, the air conditioner is turned on, and the current change curve of the compressor is recorded;

[0081] Step S302, enter the first overload protection mode, and obtain the maximum stable current I of the compressor within the operation duration of T1 稳 ;

[0082] Step S303, detect whether the compressor has an overload protection;

[0083] Step S304, when it is detected that the compressor has an overload protection, record the first continuous operation duration T2 of the compressor before the overload protection, and determine the I within T2 稳 as the overload protection current I 过载 , and record the second temperature difference R2 between the indoor temperature corresponding to the air conditioner within T2 and the user-set temperature;

[0084] Step S305, detect whether R2 is less than the second difference threshold A;

[0085] Step S306, when R2 < A, record it as the number of overload protection times once, and increase the accumulated first overload protection times J1 by 1. When R2 ≥ A, clear the accumulated first overload protection times;

[0086] Step S307, detect whether J1 is greater than or equal to the first number threshold N;

[0087] Step S308, when J1 ≥ N, enter the second overload protection mode, and detect whether the target condition is met. The target condition is used to indicate that I > I 过载 -k*I 过载 , and R1 < C or T3 > T2 - B is satisfied. I is the first current of the current compressor, R1 is the first temperature difference between the indoor temperature corresponding to the current air conditioner and the user-set temperature, T3 is the second continuous operation duration of the current compressor, k is the first preset value, k takes the value of 0.1, C is the first difference threshold, C takes the value of 3, and B is the second preset value, B takes the value of 0.3; when J1 < N, repeat the operation of step S303;

[0088] Step S309, when the target condition is met, control the compressor to enter the temperature-reached shutdown protection, and continue to run after the protection ends;

[0089] Step S310, when the target condition is not met, detect whether the compressor has an overload protection;

[0090] Step S311, when the target condition is not met and it is detected that the compressor has an overload protection, according to I 过载x =I 过载x-1 -k*I 过载x-1 lower the current overload protection current, and record it as the number of overload protection times once, and increase the newly accumulated second overload protection times J2 by 1;

[0091] Step S312, when the target condition is not met and it is detected that the compressor does not have an overload protection, detect whether the compressor enters the temperature-reached shutdown protection;

[0092] Step S313, when entering the temperature-reached shutdown protection, according to I 过载x =I 过载x-1 +k*I 过载x-1 raise the current overload protection current;

[0093] Step S314, detect in real time whether J2 is less than the second number threshold M;

[0094] Step S315, when J2 ≥ M, continue to run after the overload protection ends, and detect in real time whether I ≥ I 过载 -k*I过载 ; When J2 < M, return to step S308 and re-enter the second overload protection mode;

[0095] Step S316, when I ≥ I 过载 -k*I 过载 , control the compressor to enter the overcurrent protection, clear J2, and return to step S302 to re-enter the first overload protection mode.

[0096] As Figure 2 shown, Figure 2 is the structural diagram of a control device provided by an embodiment of the present application. The present invention also provides a control device 200, including:

[0097] A processor 210, which can be implemented by a general-purpose central processing unit (CPU), a microprocessor, an application-specific integrated circuit (ASIC), or one or more integrated circuits, etc., and is used to execute relevant programs to implement the technical solutions provided by the embodiments of the present application;

[0098] A memory 220, which can be implemented in the form of a read-only memory (ROM), a static storage device, a dynamic storage device, or a random access memory (RAM), etc. The memory 220 can store an operating system and other application programs. When implementing the technical solutions provided by the embodiments of this specification through software or firmware, the relevant program codes are stored in the memory 220 and are called by the processor 210 to execute the overload protection control method of the embodiments of the present application;

[0099] An input / output interface 230, which is used to implement information input and output;

[0100] A communication interface 240, which is used to implement communication interaction between this device and other devices, and can achieve communication through wired means (such as USB, network cable, etc.) or wireless means (such as mobile network, WIFI, Bluetooth, etc.);

[0101] A bus 250, which transmits information between the various components of the device (such as the processor 210, the memory 220, the input / output interface 230, and the communication interface 240);

[0102] Among them, the processor 210, the memory 220, the input / output interface 230, and the communication interface 240 are communicatively connected to each other inside the device through the bus 250.

[0103] In addition, an embodiment of the present application further provides an air conditioner, which includes the control device 200 of the above embodiment.

[0104] In addition, an embodiment of the present application further provides a storage medium, which is a computer-readable storage medium. The storage medium stores a computer program, and when the computer program is executed by a processor, the above overload protection control method is implemented.

[0105] As a non-transitory computer-readable storage medium, the memory can be used to store non-transitory software programs and non-transitory computer-executable programs. In addition, the memory can include high-speed random access memory, and can also include non-transitory memory, such as at least one magnetic disk storage device, a flash memory device, or other non-transitory solid-state storage devices. In some embodiments, the memory may optionally include a memory remotely disposed relative to the processor, and these remote memories can be connected to the processor through a network. Examples of the above network include, but are not limited to, the Internet, an enterprise intranet, a local area network, a mobile communication network, and combinations thereof. The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separated. They can be located in one place or distributed to multiple network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0106] Those of ordinary skill in the art can understand that all or some of the steps and systems in the methods disclosed above can be implemented as software, firmware, hardware, and appropriate combinations thereof. Some physical components or all physical components can be implemented as software executed by a processor, such as a central processing unit, a digital signal processor, or a microprocessor, or can be implemented as hardware, or can be implemented as an integrated circuit, such as an application-specific integrated circuit. Such software can be distributed on a computer-readable medium, and the computer-readable medium can include a computer storage medium (or non-transitory medium) and a communication medium (or transitory medium). As is well known to those of ordinary skill in the art, the term computer storage medium includes volatile and non-volatile, removable and non-removable media implemented in any method or technology for storing information, such as computer-readable instructions, data structures, program modules, or other data. Computer storage media include, but are not limited to, RAM, ROM, EEPROM, flash memory, or other memory technologies, CD-ROM, digital versatile disk (DVD), or other optical disk storage, magnetic cassette, tape, magnetic disk storage, or other magnetic storage devices, or any other medium that can be used to store the desired information and can be accessed by a computer. In addition, as is well known to those of ordinary skill in the art, a communication medium generally includes computer-readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave or other transmission mechanism, and can include any information delivery medium.

[0107] The foregoing has described the preferred embodiments of the present invention in detail. However, the present invention is not limited to the above-described embodiments. Those skilled in the art can still make various equivalent modifications or substitutions without departing from the spirit of the present invention, and these equivalent modifications or substitutions are all included within the scope defined by the claims of the present invention.

Claims

1. An overload protection control method, characterized in that, Applied to an air conditioner, the air conditioner includes a compressor, and the method includes: Determine the first continuous operation duration, the overload protection current, and the currently accumulated first overload protection times of the compressor before the compressor had an overload protection last time, where the overload protection current is the maximum stable current within the first continuous operation duration; When the first overload protection times are greater than the first number threshold, determine the current first current, the second continuous operation duration, and the first temperature difference of the compressor, where the first temperature difference is the difference between the indoor temperature corresponding to the current air conditioner and the user - set temperature; Generate a target condition based on the first current, the overload protection current, the second continuous operation duration, the first continuous operation duration, and the first temperature difference. When the target condition is not met, update the overload protection current, where the target condition is used to indicate that the first current is greater than the first reference value, and the second continuous operation duration is greater than or equal to the second reference value, or the first temperature difference is less than a preset first difference threshold. The first reference value is the difference between the current overload protection current and the first product, and the first product is the product obtained by multiplying the current overload protection current by a first preset value. The second reference value is the difference between the first continuous operation duration and a second preset value.

2. The overload protection control method according to claim 1, wherein The first overload protection times are determined according to the following steps: When it is detected that the compressor has an overload protection, determine the second temperature difference within the continuous operation duration before the compressor triggered the overload protection, where the second temperature difference is the difference between the indoor temperature corresponding to the air conditioner and the user - set temperature; When the second temperature difference is less than a preset second difference threshold, increment the current first overload protection times by 1; When the second temperature difference is greater than or equal to the second difference threshold, clear the currently accumulated first overload protection times.

3. The overload protection control method according to claim 2, wherein, The method further includes: When the first overload protection times are less than or equal to the first number threshold and the overload protection of the compressor ends and it resumes operation, re - detect whether the compressor has an overload protection; When it is detected that the compressor has an overload protection, re - determine the new second temperature difference within the continuous operation duration before the compressor triggered the overload protection. When the new second temperature difference is less than the second difference threshold, increment the current first overload protection times by 1. When the new second temperature difference is greater than or equal to the second difference threshold, clear the currently accumulated first overload protection times.

4. The overload protection control method according to claim 1, characterized in that, When the target condition is not met, updating the overload protection current includes: When the target condition is not met, detect whether the compressor enters an overload protection; When the compressor enters overload protection, update the current overload protection current to the third reference value, re-record the number of overload protections occurred by the compressor as the second overload protection times, and increase the current second overload protection times by 1, where the third reference value is the difference between the second product and the current overload protection current, and the second product is the product of the current overload protection current and the first preset value; When the compressor does not enter overload protection and the compressor enters temperature-reached shutdown protection, update the current overload protection current to the fourth reference value, where the fourth reference value is the sum value between the second product and the current overload protection current.

5. The overload protection control method according to claim 1, wherein The method further includes: Under the condition of meeting the target condition, control the compressor to enter temperature-reached shutdown protection.

6. The overload protection control method according to claim 4, characterized in that The method further includes: When the second overload protection times is greater than or equal to the second times threshold, after the overload protection of the compressor ends and the compressor resumes operation, detect the comparison relationship between the first current and the first reference value in real time; When the first current is greater than or equal to the first reference value, control the compressor to enter overcurrent protection.

7. The overload protection control method according to claim 6, characterized in that, After controlling the compressor to enter overcurrent protection, the method further includes: Clear the second overload protection times; After the overcurrent protection of the compressor ends and the compressor resumes operation, re-determine the first overload protection times. When the first overload protection times is greater than the first times threshold, re-determine the current first current, the second continuous operation duration, the first continuous operation duration of the compressor before the last overload protection occurred by the compressor, the overload protection current and the first temperature difference of the compressor, and re-generate a new target condition based on the first current, the overload protection current, the second continuous operation duration, the first continuous operation duration and the first temperature difference. If the new target condition is not met, update the overload protection current.

8. A control device, characterized in that, Comprising at least one control processor and a memory for communicatively connecting with the at least one control processor; the memory stores instructions executable by the at least one control processor, and the instructions are executed by the at least one control processor so that the at least one control processor can execute the overload protection control method according to any one of claims 1 to 7.

9. An air conditioner, characterized in that, Comprising the control device according to claim 8.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer-executable instructions, and the computer-executable instructions are used to cause a computer to execute the overload protection control method according to any one of claims 1 to 7.

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