Compressor control method and refrigeration equipment

Abstract

The invention discloses a compressor control method and refrigeration equipment, and the compressor control method comprises the steps that the outdoor environment temperature of a compressor is detected, and the lowest rotating speed Smin of the environment temperature section where the outdoor environment temperature is located is obtained; detecting the instantaneous power P of the compressor; when the instantaneous power P is lower than the set overpower interval, the current rotating speed of the compressor is maintained; and when the instantaneous power P is in the set overpower interval, the current rotating speed of the compressor is reduced, whether the actual rotating speed of the compressor reaches the minimum rotating speed Smin or not is judged, if not, the instantaneous power P of the compressor is detected again, and if yes, the overpower protection strategy is executed. When it is detected that the power of the compressor is abnormal, the load of the compressor is reduced in a rotating speed reduction mode, the instantaneous power of the compressor is reduced, so that the compressor can stably operate for a long time under the severe working condition, and the reliability of the refrigerating system is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of refrigeration equipment, in particular to a compressor control method and refrigeration equipment. Background Art

[0002] In modern refrigeration technology, refrigerators are indispensable electrical appliances for households and commercial places. Their performance stability and energy efficiency have always been key considerations in research and development and production. The core component of the refrigerator, the compressor, is responsible for compressing the refrigerant, increasing the refrigerant pressure and temperature, and thus completing the refrigeration cycle. However, in actual use, especially under harsh working conditions, such as extremely high temperature environments, large voltage fluctuations, or limited heat dissipation conditions, the operation of the compressor faces severe challenges.

[0003] Under harsh working conditions, the compressor needs to consume more energy to maintain the cooling effect, which directly leads to a sharp increase in its operating power. When the compressor operating power exceeds the preset safety threshold, in order to protect the circuit from overload damage, the built-in overpower protection device of the refrigerator will respond quickly and force the compressor to shut down. Although this protection measure effectively avoids immediate hardware failures, frequent triggering brings new problems: on the one hand, the frequent start and stop of the compressor not only seriously affects the overall energy efficiency of the refrigerator, reduces the refrigeration efficiency, but also increases energy consumption, which runs counter to the current social demand for energy conservation and environmental protection; on the other hand, the frequent start and stop of the compressor aggravates mechanical wear and electrical stress, greatly shortens the service life of the compressor, and also increases the risk of failure of related components such as the inverter, resulting in increased maintenance costs.

[0004] In particular, as a representative of the new generation of high-efficiency energy-saving technology, wide-band compressors are designed with a wider operating frequency range and a higher energy efficiency ratio. However, when faced with harsh working conditions, due to their wider adjustment range and more sensitive response, they are more likely to trigger over-power protection conditions, resulting in more frequent shutdowns, which poses a severe challenge to the long-term stable operation of the compressor.

[0005] In summary, the existing refrigerator compressor control strategy has obvious limitations when dealing with harsh working conditions, which not only affects the overall performance and energy efficiency of the refrigerator, but also aggravates the loss of the compressor and its related components. A more intelligent and efficient control method is urgently needed to enhance the self-protection ability of the compressor under harsh working conditions, ensure the stable operation of the refrigerator and extend its service life. Summary of the invention

[0006] In order to solve the above-mentioned defects in the prior art, the present invention proposes a compressor control method and a refrigeration device. The compressor control method reduces the instantaneous power of the compressor by reducing the rotational speed, avoids frequent triggering of over-power protection under severe working conditions, improves the reliability of the compressor, and extends its service life.

[0007] The technical solution adopted by the present invention is to design a compressor control method, including:

[0008] Detect the outdoor ambient temperature of the compressor and obtain the minimum speed S of the ambient temperature section where the outdoor ambient temperature is located. min ;

[0009] Detecting the instantaneous power P of the compressor;

[0010] When the instantaneous power P is lower than the set overpower interval, maintaining the current speed of the compressor;

[0011] When the instantaneous power P is in the set overpower interval, the current speed of the compressor is reduced to determine whether the actual speed of the compressor reaches the minimum speed S min If not, then return to detect the instantaneous power P of the compressor, and if so, execute the over-power protection strategy.

[0012] Furthermore, the compressor control method includes:

[0013] Dividing the set overpower interval into at least two sub-intervals, each of the sub-intervals is configured with a corresponding set first duration T1;

[0014] When the instantaneous power P is in the set overpower interval, determine whether the duration of the instantaneous power P in any of the sub-intervals exceeds the corresponding set first duration T1. If so, reduce the current speed of the compressor; if not, maintain the current speed of the compressor.

[0015] Furthermore, the over-power protection strategy includes:

[0016] Each of the sub-intervals is configured with a corresponding set second duration T2;

[0017] Detect the instantaneous power P of the compressor, and determine whether the duration of the instantaneous power P in any of the sub-intervals exceeds the corresponding set second duration T2. ​​If so, the compressor is shut down for protection; if not, the compressor continues to run at the current speed.

[0018] Furthermore, the over-power protection strategy includes:

[0019] Divide the largest sub-interval into at least two abnormal power sub-intervals, and regard each of the remaining sub-intervals as an abnormal power sub-interval, each of the abnormal power sub-intervals being configured with a corresponding set second time length T2;

[0020] Detect the instantaneous power P of the compressor, and determine whether the duration of the instantaneous power P in any of the abnormal power sub-intervals exceeds the corresponding set second duration T2. ​​If so, the compressor is shut down for protection; if not, the compressor continues to run at the current speed.

[0021] Furthermore, the compressor control method further includes:

[0022] Obtaining the target speed of the ambient temperature section where the outdoor ambient temperature is located;

[0023] When the compressor continues to run at the current speed for a set third time period T3, it runs at the target speed.

[0024] Furthermore, the compressor control method further includes:

[0025] After the compressor is shut down for protection, the compressor waits for a fourth set time period T4, and then resumes operation and returns to detecting the outdoor ambient temperature where the compressor is located.

[0026] Furthermore, the smaller the sub-interval is, the longer the corresponding first time length T1 is set; the smaller the abnormal power sub-interval is, the longer the corresponding second time length T2 is set.

[0027] In some embodiments, the set overpower interval is divided into two sub-intervals, namely [220W, 250W) and [250W, +≦).

[0028] In some embodiments, the set overpower interval is divided into four abnormal power sub-intervals, namely [220W, 250W), [250W, 270W), [270W, 300W), and [300W, +≦).

[0029] The present invention further provides a refrigeration device, comprising: a compressor, wherein a controller of the refrigeration device executes the above-mentioned compressor control method.

[0030] In some embodiments, the refrigeration device is a refrigerator.

[0031] Compared with the prior art, the present invention has at least one of the following beneficial effects:

[0032] 1. When the power of the compressor is detected to be abnormal, the load of the compressor is reduced by reducing the speed, and the instantaneous power of the compressor is reduced, so that the compressor can operate stably for a long time under harsh working conditions, and the reliability of the refrigeration system is improved;

[0033] 2. When the speed drops to the lower limit of the corresponding ambient temperature range, the timing of compressor shutdown protection is controlled by detecting the duration of abnormal power in each range to avoid frequent triggering of over-power protection under severe working conditions, effectively protect the compressor and extend its service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The present invention is described in detail below with reference to the embodiments and accompanying drawings, wherein:

[0035] Figure 1 is a flow chart of a compressor control method of the present invention;

[0036] Figure 2 It is a schematic diagram of a flow chart of an embodiment of the present invention;

[0037] Figure 3 It is a flow chart of the over-power protection strategy of the present invention;

[0038] Figure 4 is a flow chart of another embodiment of the present invention;

[0039] Figure 5 It is a flow chart of another embodiment of the present invention;

[0040] Figure 6 It is a flow chart of an application example of the present invention. DETAILED DESCRIPTION

[0041] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0042] The compressor control method proposed in the present invention is suitable for refrigeration equipment, especially refrigeration equipment with a wide-band compressor. The wide-band compressor changes the operating frequency of the compressor so that it can operate more efficiently and adapt to a wider temperature range and working conditions. However, in the face of harsh working conditions, due to its wider adjustment range and more sensitive response, it is easier to trigger the over-power protection, resulting in more frequent shutdowns, which poses a severe challenge to the long-term stable operation of the compressor.

[0043] Based on this, the compressor control method proposed in the present invention can improve the self-protection ability of the compressor under harsh working conditions, ensure the stable operation of the refrigeration equipment and extend its service life. Specifically, the compressor control method aims to improve the operating efficiency of the compressor while ensuring its stable operation under complex working conditions. By real-time monitoring of the outdoor ambient temperature, the instantaneous power of the compressor and the actual speed, the method can dynamically adjust the operating state of the compressor, thereby avoiding equipment damage or reduced energy efficiency caused by overpower.

[0044] The compressor control method is described in detail below.

[0045] like Figure 1 As shown, the compressor control method includes:

[0046] Detect the outdoor ambient temperature of the compressor and obtain the minimum speed S of the ambient temperature range where the outdoor ambient temperature is located min ;

[0047] Detect the instantaneous power P of the compressor;

[0048] When the instantaneous power P is lower than the set overpower range, it means that the compressor is in normal working condition and the current speed of the compressor is maintained;

[0049] When the instantaneous power P is in the set overpower range, it means that the compressor is in a bad working condition. Reduce the current speed of the compressor. By reducing the speed, the power output of the compressor can be reduced, so that the instantaneous power P of the compressor decreases. After reducing the speed, continue to determine whether the actual speed of the compressor reaches the minimum speed S. min If not, it means that the instantaneous power P of the compressor can still be adjusted by reducing the speed, and return to re-detect the instantaneous power P of the compressor. If so, it means that the instantaneous power P of the compressor can no longer be adjusted by reducing the speed, and the over-power protection strategy is executed.

[0050] It should be understood that the compressor has a corresponding minimum speed S in each ambient temperature range. min , minimum speed S min This is to ensure that the compressor can maintain a certain refrigeration capacity in this ambient temperature range. If the speed is lower than this minimum value, the cooling capacity of the compressor will not be able to meet the demand, resulting in poor refrigeration effect. Moreover, when the speed of the compressor is too low, the friction and wear of its internal mechanical parts may increase, and the heat exchange efficiency will also decrease. These factors will cause the performance of the compressor to decline, further affecting the cooling capacity. In addition, the theoretical power of the compressor is proportional to the cube of the speed, but in actual operation, due to the influence of the speed on factors such as heat exchange and leakage, the actual power may be greater than the theoretical power. When the speed is too low, the power drop will no longer be obvious, and it may even happen that the power loss is greater than the reduction in cooling capacity, resulting in reduced efficiency of the compressor.

[0051] like Figure 2 As shown, in some feasible embodiments of the present invention, the compressor control method includes:

[0052] Detect the outdoor ambient temperature of the compressor and obtain the minimum speed S of the ambient temperature range where the outdoor ambient temperature is located min ;

[0053] Detect the instantaneous power P of the compressor, and divide the set overpower interval into at least two sub-intervals, each sub-interval being configured with a corresponding set first time length T1;

[0054] When the instantaneous power P is lower than the set overpower range, the current speed of the compressor is maintained;

[0055] When the instantaneous power P is in the set overpower interval, if the duration of the instantaneous power P in any sub-interval exceeds the corresponding set first duration T1, the current speed of the compressor is reduced to reduce the instantaneous power P to restore it to a normal state, and it is determined whether the actual speed of the compressor reaches the minimum speed S min If not, maintain the current speed of the compressor to avoid frequent fluctuations in the speed of the compressor, and return to detect the instantaneous power P of the compressor. If yes, execute the overpower protection strategy.

[0056] This design uses a time-sharing speed reduction method to adjust the compressor. By dividing the set overpower interval of the compressor into at least two sub-intervals and configuring the corresponding set first duration T1, the change of the instantaneous power P is monitored more carefully, thereby improving the accuracy and stability of the control. The first duration T1 can be used as a threshold to determine whether the abnormal state of the instantaneous power P continues for a period of time, which is equivalent to confirming whether the abnormal state of the instantaneous power P exists stably. It can avoid misjudgment due to accidental factors, and maintain the compressor speed as stable as possible, thereby improving the reliability of the refrigeration system.

[0057] like Figure 3 As shown, in some feasible embodiments of the present invention, the over-power protection strategy includes:

[0058] Each sub-interval is configured with a corresponding set second time length T2, which is a threshold for judging whether the instantaneous power P is continuously abnormal in the corresponding sub-interval. The second time length T2 provides a buffer time for the compressor, allowing the instantaneous power P to return to normal after a short fluctuation. Only when the duration of the instantaneous power P in the sub-interval exceeds T2, the compressor is considered to be in an overpower state and protective measures need to be taken;

[0059] Detect the instantaneous power P of the compressor and determine whether the duration of the instantaneous power P in any sub-interval exceeds the corresponding set second time length T2. If so, the compressor is shut down for protection to prevent the compressor from continuing to run in an abnormal state, thereby protecting the compressor from damage. If not, the compressor continues to run at the current speed to meet the cooling or heating needs, avoiding energy efficiency loss and reduced user experience caused by unnecessary shutdown.

[0060] This design controls the timing of compressor shutdown protection by detecting the duration of abnormal power in each range, avoiding frequent triggering of overpower protection under severe working conditions, effectively protecting the compressor and extending its service life.

[0061] On this basis, the preferred solution of the present invention is to refine the sub-intervals to improve the accuracy of the over-power protection strategy. Specifically, the over-power protection strategy includes:

[0062] Divide the largest sub-interval into at least two abnormal power sub-intervals, and regard each of the remaining sub-intervals as an abnormal power sub-interval, each abnormal power sub-interval being configured with a corresponding set second time length T2;

[0063] Detect the instantaneous power P of the compressor and determine whether the duration of the instantaneous power P in any abnormal power sub-interval exceeds the corresponding set second duration T2. ​​If so, the compressor is shut down for protection; if not, the compressor continues to run at the current speed.

[0064] Since the instantaneous power P corresponding to the largest sub-interval is relatively high, the working state of the compressor has far exceeded its optimal efficiency point. High-power operation will significantly accelerate the mechanical wear and electrical aging process of the compressor, seriously affecting its service life. Therefore, this design further refines the largest sub-interval into smaller abnormal power sub-intervals, which can achieve more detailed monitoring of the compressor's instantaneous power P, help capture more subtle power fluctuations, and thus more accurately determine whether the compressor is in an abnormal state.

[0065] like Figure 4 As shown, in some feasible embodiments of the present invention, the compressor control method includes:

[0066] Detect the outdoor ambient temperature of the compressor and obtain the minimum speed S of the ambient temperature range where the outdoor ambient temperature is located min and target speed;

[0067] Detect the instantaneous power P of the compressor, and divide the set overpower interval into at least two sub-intervals, each sub-interval being configured with a corresponding set first time length T1 and a set second time length T2;

[0068] When the instantaneous power P is lower than the set overpower range, the current speed of the compressor is maintained;

[0069] When the instantaneous power P is in the set overpower interval, if the duration of the instantaneous power P in any sub-interval exceeds the corresponding set first duration T1, the current speed of the compressor is reduced to determine whether the actual speed of the compressor reaches the minimum speed S min If not, maintain the current speed of the compressor and return to detect the instantaneous power P of the compressor. If yes, execute the overpower protection strategy;

[0070] Among them, the over-power protection strategy includes:

[0071] Detect the instantaneous power P of the compressor, and determine whether the duration of the instantaneous power P in any sub-interval exceeds the corresponding set second time length T2. If so, the compressor is shut down for protection. If not, the compressor continues to run at the current speed. When the compressor continues to run at the current speed for the set third time length T3, it means that the compressor has not triggered the shutdown protection action within the set third time length T3, and the compressor is in a stable state for a long time. At this time, the compressor is controlled to run at the target speed.

[0072] The purpose of this design is that the outdoor ambient temperature is an important factor affecting the operating efficiency and energy consumption of the compressor. Depending on the outdoor ambient temperature, the compressor needs to run at different speeds to achieve optimal energy efficiency. Therefore, each ambient temperature section is configured with its corresponding target speed. When the compressor can maintain a stable state for a long time, controlling the compressor to run at the target speed can significantly improve the operating efficiency and energy efficiency of the compressor.

[0073] It should be understood that during the operation of the compressor, the outdoor ambient temperature and instantaneous power P of the compressor will be detected in real time, and the minimum speed S will be re-obtained when the outdoor ambient temperature changes. min , before the compressor drops to the minimum speed S min Before that, first determine whether the instantaneous power P is in the set overpower range, adjust the speed of the compressor, and when the compressor drops to the minimum speed S min After that, the overpower protection strategy is executed. That is, after the compressor runs at the target speed, it returns to detect the outdoor ambient temperature of the compressor and restarts the process of the compressor control method.

[0074] like Figure 5 As shown, in some feasible embodiments of the present invention, the compressor control method includes:

[0075] Detect the outdoor ambient temperature of the compressor and obtain the minimum speed S of the ambient temperature range where the outdoor ambient temperature is located min ;

[0076] Detect the instantaneous power P of the compressor, and divide the set overpower interval into at least two sub-intervals, each sub-interval being configured with a corresponding set first time length T1 and a set second time length T2;

[0077] When the instantaneous power P is lower than the set overpower range, the current speed of the compressor is maintained;

[0078] When the instantaneous power P is in the set overpower interval, if the duration of the instantaneous power P in any sub-interval exceeds the corresponding set first duration T1, the current speed of the compressor is reduced to determine whether the actual speed of the compressor reaches the minimum speed S min If not, maintain the current speed of the compressor and return to detect the instantaneous power P of the compressor. If yes, execute the overpower protection strategy;

[0079] Among them, the over-power protection strategy includes:

[0080] Detect the instantaneous power P of the compressor, and determine whether the duration of the instantaneous power P in any sub-interval exceeds the corresponding set second time length T2. If so, the compressor will shut down for protection and wait for the set fourth time length T4. The compressor will resume operation and return to detect the outdoor ambient temperature of the compressor. If not, the compressor will continue to run at the current speed.

[0081] The entire control method is designed to ensure that the compressor can operate in a safe and efficient state. By real-time monitoring of instantaneous power and triggering the overpower protection strategy, the compressor can be prevented from being damaged by overpower. At the same time, a waiting time is set after the shutdown protection - the fourth time length T4 is set to allow the compressor to cool and recover, avoiding further damage caused by immediate startup. After resuming operation, by re-detecting the outdoor ambient temperature and determining the target speed, the compressor can be adaptively adjusted according to the current environmental conditions to improve operating efficiency and energy efficiency.

[0082] It should be pointed out that the smaller the instantaneous power of the compressor, the higher its stability and reliability, so the time condition for triggering the compressor to make an adjustment action or a shutdown action should be longer. That is, the smaller the sub-interval, the longer the corresponding first time length T1 is set; the smaller the abnormal power sub-interval, the longer the corresponding second time length T2 is set.

[0083] According to the inventor's analysis of the actual operating data of the refrigeration equipment, 220W, 250W, 270W and 300W are common over-power values. In actual applications, the over-power interval is set to [220W, +≦). The set over-power interval is divided into two sub-intervals, namely [220W, 250W) and [250W, +≦). The largest sub-interval [250W, +≦) is divided into three abnormal power sub-intervals, namely the set over-power interval is divided into four abnormal power sub-intervals, namely [250W, 270W), [270W, 300W), and [300W, +≦). That is, there are four abnormal power sub-intervals, namely [220W, 250W), [250W, 270W), [270W, 300W), and [300W, +≦).

[0084] On this basis, the first time length T1 corresponding to [220W, 250W) is set to 5 minutes, the first time length T1 corresponding to [250W, +≦) is set to 1 minute, the second time length T2 corresponding to [300W, +≦) is set to 5 seconds, the second time length T2 corresponding to [270W, 300W) is set to 30 minutes, the second time length T2 corresponding to [250W, 270W) is set to 1 hour, and the second time length T2 corresponding to [220W, 250W) is set to 6 hours. In addition, the third time length T3 can be set to 180 minutes, and the fourth time length T4 can be set to 5 minutes.

[0085] It should be pointed out that since the main reason for triggering the overpower protection is that the temperature is too high, resulting in excessive load on the compressor, the above compressor control method is mainly aimed at outdoor high temperature environments, and only the high temperature ambient temperature section (for example, the ambient temperature section is set to 34°C to 44°C) and the minimum speed S corresponding to the ambient temperature section can be set. min and the target speed. If the outdoor ambient temperature of the compressor is within the ambient temperature range, the above compressor control method is executed.

[0086] The present invention also provides a refrigeration device having a compressor, wherein a controller of the refrigeration device executes the above-mentioned compressor control method, and the refrigeration device includes but is not limited to a refrigerator.

[0087] like Figure 6 As shown, for ease of understanding, taking the application example of the present invention as an example, the execution process of the compressor control method is described in detail below.

[0088] Step S1, detecting the outdoor ambient temperature of the compressor;

[0089] Step S2: Obtain the minimum speed S of the ambient temperature section where the outdoor ambient temperature is located. min and target speed;

[0090] Step S3, detecting the instantaneous power P of the compressor;

[0091] Step S4, determine whether P ≥ 250W, if yes, execute step S5, if no, execute step S8;

[0092] Step S5, determine whether the duration of P≥250W is greater than or equal to 1 minute, if so, execute step S6, if not, return to step S3;

[0093] Step S6: If the working condition is bad, the compressor speed is reduced by one level;

[0094] Step S7: Determine whether the actual speed of the compressor reaches the minimum speed S min If yes, go to step S11, if no, go back to step S3;

[0095] Step S8, determine whether 220W≤P<250W, if yes, execute step S9, if no, execute step S10;

[0096] Step S9, determine whether the duration of 220W≤P<250W is greater than or equal to 5 minutes, if so, execute step S6, if not, execute step S10;

[0097] Step S10: determine that the operating condition is normal, maintain the speed, and return to step S3;

[0098] Step S11, detecting the instantaneous power P of the compressor;

[0099] Step S12, determine whether the duration of P∈[300W, +≦) is greater than or equal to 5s, if not, execute step S13, if yes, execute step S17;

[0100] Step S13, determine whether the duration of P∈[270W, 300W) is greater than or equal to 30 minutes, if not, execute step S14, if yes, execute step S17;

[0101] Step S14, determine whether the duration of P∈[250W, 270W) is greater than or equal to 1h, if not, execute step S15, if yes, execute step S17;

[0102] Step 15, determine whether the duration of P∈[220W, 250W) is greater than or equal to 6h, if not, execute step S16, if yes, execute step S17;

[0103] Step S16, running at the current speed for 180 minutes, running at the target speed after 180 minutes, and returning to step S1;

[0104] Step S17, the compressor stops for 5 minutes, and an overpower protection fault signal is reported within 5 minutes;

[0105] Step S18: Restart the compressor and return to step S1.

[0106] It should be noted that the terms used above are only for describing specific embodiments and are not intended to limit exemplary embodiments according to the present invention. When the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof. The order of execution of actions, steps, etc. in the devices and methods shown in the specification and the accompanying drawings can be implemented in any order as long as there is no special explicit limitation on the order and the output of the previous processing is not used in the subsequent processing. Similar terms of order used for the convenience of description do not mean that they must be implemented in such an order.

[0107] Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, such techniques, methods, and apparatus should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limiting. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following figures, and therefore, once an item is defined in one figure, it does not need to be further discussed in subsequent figures.

[0108] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A compressor control method, characterized in that: include: Detect the outdoor ambient temperature of the compressor and obtain the minimum speed S of the ambient temperature section where the outdoor ambient temperature is located. min ; Detecting the instantaneous power P of the compressor; When the instantaneous power P is lower than the set overpower interval, maintaining the current speed of the compressor; When the instantaneous power P is in the set overpower interval, the current speed of the compressor is reduced to determine whether the actual speed of the compressor reaches the minimum speed S min If not, then return to detect the instantaneous power P of the compressor, and if so, execute the over-power protection strategy.

2. The compressor control method according to claim 1, characterized in that: The compressor control method comprises: Dividing the set overpower interval into at least two sub-intervals, each of the sub-intervals is configured with a corresponding set first duration T1; When the instantaneous power P is in the set overpower interval, determine whether the duration of the instantaneous power P in any of the sub-intervals exceeds the corresponding set first duration T1. If so, reduce the current speed of the compressor; if not, maintain the current speed of the compressor.

3. The compressor control method according to claim 2, characterized in that: The over-power protection strategy includes: Each of the sub-intervals is configured with a corresponding set second duration T2; Detect the instantaneous power P of the compressor, and determine whether the duration of the instantaneous power P in any of the sub-intervals exceeds the corresponding set second duration T2. ​​If so, the compressor is shut down for protection; if not, the compressor continues to run at the current speed.

4. The compressor control method according to claim 3, characterized in that: The over-power protection strategy includes: Divide the largest sub-interval into at least two abnormal power sub-intervals, and regard each of the remaining sub-intervals as an abnormal power sub-interval, each of the abnormal power sub-intervals being configured with a corresponding set second time length T2; Detect the instantaneous power P of the compressor, and determine whether the duration of the instantaneous power P in any of the abnormal power sub-intervals exceeds the corresponding set second duration T2. ​​If so, the compressor is shut down for protection; if not, the compressor continues to run at the current speed.

5. The compressor control method according to claim 3 or 4, characterized in that: The compressor control method further includes: Obtaining the target speed of the ambient temperature section where the outdoor ambient temperature is located; When the compressor continues to run at the current speed for a set third time period T3, it runs at the target speed.

6. The compressor control method according to claim 3 or 4, characterized in that: The compressor control method further includes: After the compressor is shut down for protection, the compressor waits for a fourth set time period T4, and then resumes operation and returns to detecting the outdoor ambient temperature where the compressor is located.

7. The compressor control method according to claim 4, characterized in that: The smaller the sub-interval is, the longer the corresponding first time length T1 is set; the smaller the abnormal power sub-interval is, the longer the corresponding second time length T2 is set.

8. The compressor control method according to claim 2, characterized in that: The set overpower interval is divided into two sub-intervals, namely [220W, 250W) and [250W, +≦).

9. The compressor control method according to claim 4, characterized in that: The set overpower interval is divided into four abnormal power sub-intervals, namely [220W, 250W), [250W, 270W), [270W, 300W), and [300W, +≦).

10. Refrigeration equipment, including: The compressor is characterized in that the controller of the refrigeration equipment executes the compressor control method according to any one of claims 1 to 9.

11. The refrigeration device according to claim 10, characterized in that: The refrigeration equipment is a refrigerator.

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