A control method of a heat dissipation device and a related device

Abstract

The application relates to a control method of a heat dissipation device and a related device, the heat dissipation device comprising a first heat dissipation flow channel covering a first temperature control area in a power module group and a second heat dissipation flow channel covering a second temperature control area in the power module group, the first heat dissipation flow channel being communicated with a refrigeration circuit through a first control member, the second heat dissipation flow channel being communicated with the refrigeration circuit through a second control member, the first temperature control area and the second temperature control area having different heat loads; the method comprising: acquiring module temperatures of each power module in the power module group; determining, for each module temperature, a comparison result between the module temperature and a target dew point temperature; and controlling the first control member and the second control member based on all the obtained comparison results. The application guarantees the heat dissipation demand of a high heat load area and prevents condensation in a low heat load area due to excessive heat dissipation, thereby improving the operation stability and service life of a frequency converter.

Description

Technical Field

[0001] This application relates to the field of frequency converter technology, and in particular to a control method for a heat dissipation device and related equipment. Background Technology

[0002] During the operation of a frequency converter, the temperature of the power module group in the frequency converter directly determines its working stability and service life. Insufficient heat dissipation of the power module group can lead to overheating or even damage.

[0003] Currently, most heat dissipation methods for power module groups are liquid cooling, which involves covering the power module group with heat dissipation channels. These channels are then connected to the refrigeration circuit in the frequency converter via electronic expansion valves. By controlling the opening of the electronic expansion valves, the flow rate of refrigerant through the power module group is adjusted, thereby achieving heat dissipation for the entire power module group.

[0004] However, due to the uneven distribution of heat load in the power module group, the above heat dissipation method can easily cause some power modules in the power module group to overheat and condensate, which can lead to faults such as short circuits and insulation failures, seriously affecting the operating stability and service life of the frequency converter. Summary of the Invention

[0005] This application provides a control method for a heat dissipation device and related equipment to solve the problem that existing heat dissipation methods easily lead to excessive heat dissipation in some power modules of the power module group, resulting in condensation, which in turn causes faults such as short circuits and insulation failures, seriously affecting the operating stability and service life of the frequency converter.

[0006] In a first aspect, this application provides a control method for a heat dissipation device, the heat dissipation device including a first heat dissipation channel covering a first temperature control area in a power module group and a second heat dissipation channel covering a second temperature control area in the power module group, the first heat dissipation channel being connected to a refrigeration circuit via a first control component, and the second heat dissipation channel being connected to the refrigeration circuit via a second control component, wherein the heat loads of the first temperature control area and the second temperature control area are different; the method includes: Obtain the module temperature of each power module in the power module group; For each module temperature, determine the comparison result between the module temperature and the target dew point temperature; Based on all the obtained comparison results, the first control element and the second control element are controlled.

[0007] In an optional implementation, controlling the first control element and the second control element based on all the obtained comparison results includes: From all the obtained comparison results, determine each comparison result that satisfies a first preset condition, the first preset condition including that the comparison result is that the module temperature is less than or equal to the target dew point temperature; Count the target number of all comparison results that satisfy the first preset condition; Based on the target number, determine the condensation risk type corresponding to the power module group; Based on the condensation risk type, the opening degree of the first control element and the second control element is controlled so that the power module group meets the second preset condition. The second preset condition includes that the module temperature corresponding to each power module in the power module group is greater than the target dew point temperature.

[0008] In one optional implementation, the heat load of the first temperature control zone is higher than the heat load of the second temperature control zone; The control of the opening degree of the first and second control components based on the condensation risk type, so that the power module group meets the second preset condition, includes: When the condensation risk type is the first preset type, the opening degree of the first control element and the second control element is reduced so that the power module group meets the second preset condition. The first preset type is used to indicate that the power module group as a whole has a condensation risk. When the condensation risk type is the second preset type, the opening degree of the first control component is kept unchanged, and the opening degree of the second control component is reduced, so that the power module group meets the second preset condition. The second preset type is used to indicate that there is a condensation risk in a local area of ​​the power module group.

[0009] In an optional implementation, determining the condensation risk type corresponding to the power module group based on the target number includes: When the number of targets is greater than or equal to a preset threshold, the condensation risk type corresponding to the power module group is determined to be the first preset type; When the number of targets is less than the preset number threshold, the condensation risk type corresponding to the power module group is determined to be the second preset type.

[0010] In one optional embodiment, each power module in the power module group is provided with a heating module on its surface; The control of the opening degree of the first and second control components based on the condensation risk type, so that the power module group meets the second preset condition, includes: From the power module group, determine the target power modules corresponding to each comparison result that satisfies the first preset condition; Based on the condensation risk type, the opening degree of the first control element and the second control element is controlled, and the heating module on the surface of each target power module is controlled to work, so that the power module group meets the second preset condition.

[0011] In an optional implementation, the power module group is disposed within the frequency converter; The target dew point temperature is determined in the following manner: The first ambient temperature and first ambient humidity corresponding to the internal environment of the frequency converter are obtained, and the second ambient temperature and second ambient humidity corresponding to the external environment of the frequency converter are obtained. Based on the first ambient temperature and the first ambient humidity, a first dew point temperature corresponding to the internal environment is determined, and based on the second ambient temperature and the second ambient humidity, a second dew point temperature corresponding to the external environment is determined. The maximum dew point temperature is determined from the first dew point temperature and the second dew point temperature; The maximum dew point temperature is determined as the target dew point temperature.

[0012] In one optional implementation, the heat load of the first temperature control zone is higher than the heat load of the second temperature control zone; The control of the first control element and the second control element based on all the obtained comparison results includes: When all the obtained comparison results show that the module temperature is greater than the target dew point temperature, the highest module temperature is determined from all the obtained module temperatures. When the highest module temperature is greater than the first temperature threshold and less than the second temperature threshold, the opening degree of the first control element and the second control element is increased so that the power module group meets the third preset condition. Wherein, the first temperature threshold is the highest temperature at which the power module can operate safely, the second temperature threshold is the limit temperature at which the power module is allowed to operate, the opening adjustment range of the first control component is greater than the opening adjustment range of the second control component, and the third preset condition includes that the module temperature corresponding to each power module in the power module group is less than or equal to the first temperature threshold.

[0013] In an optional implementation, after determining the highest module temperature, the method further includes: When the highest module temperature is less than or equal to the first temperature threshold, the lowest module temperature is determined from all the obtained module temperatures; Based on a first preset PID algorithm, the opening degree of the first control component is controlled so that the highest module temperature reaches a third temperature threshold; and based on a second preset PID algorithm, the opening degree of the second control component is controlled so that the lowest module temperature reaches a fourth temperature threshold. The third temperature threshold is the target temperature to ensure the safe operation of the power module group, and the third temperature threshold is less than the first temperature threshold. The fourth temperature threshold is the target temperature to ensure that the power module group has no risk of condensation, and the fourth temperature threshold is greater than the target dew point temperature.

[0014] Secondly, this application provides a control device for a heat dissipation device, the heat dissipation device including a first heat dissipation channel covering a first temperature control area in a power module group and a second heat dissipation channel covering a second temperature control area in the power module group, the first heat dissipation channel being connected to a cooling circuit via a first control element, and the second heat dissipation channel being connected to the cooling circuit via a second control element, wherein the heat loads of the first temperature control area and the second temperature control area are different; the device includes: An acquisition module is used to acquire the module temperature of each power module in the power module group; A determining module is used to determine a comparison result between the module temperature and the target dew point temperature for each module temperature; A control module is used to control the first control element and the second control element based on all the obtained comparison results.

[0015] Thirdly, this application provides a heat dissipation device, including: a first heat dissipation channel covering a first temperature control area in a power module group and a second heat dissipation channel covering a second temperature control area in the power module group, a processor, and a memory; The first heat dissipation channel is connected to the refrigeration circuit through the first control component, and the second heat dissipation channel is connected to the refrigeration circuit through the second control component. The heat loads of the first temperature control area and the second temperature control area are different. The processor is used to execute the control program of the heat dissipation device stored in the memory to implement the control method of the heat dissipation device as described above.

[0016] Fourthly, this application provides a frequency converter, including the heat dissipation device as described above.

[0017] Fifthly, this application provides a storage medium storing one or more programs that can be executed by one or more processors to implement the control method for the heat dissipation device as described above.

[0018] Compared with the prior art, the technical solution provided in this application has the following advantages. The control method for the heat dissipation device provided in this application includes a first heat dissipation channel covering a first temperature control area in a power module group and a second heat dissipation channel covering a second temperature control area in the power module group. The first heat dissipation channel is connected to the refrigeration circuit through a first control element, and the second heat dissipation channel is connected to the refrigeration circuit through a second control element. The heat loads of the first temperature control area and the second temperature control area are different. The method includes: acquiring the module temperature of each power module in the power module group; determining the comparison result between the module temperature and the target dew point temperature for each module temperature; and controlling the first control element and the second control element based on all the obtained comparison results. By dividing the power module group in the frequency converter into two independent temperature control zones according to the heat load distribution, and setting independent first and second heat dissipation channels respectively, the refrigerant flow rate of the corresponding heat dissipation channels is controlled by two independent first and second controllers. This architecture breaks through the limitations of the single heat dissipation channel and uniform adjustment of heat dissipation intensity in the prior art. Furthermore, based on the above architecture, by acquiring the module temperature of each power module in the power module group, and comparing the module temperature of each power module with the target dew point temperature, the first and second controllers are differentially controlled. This allows for dynamic adjustment of the heat dissipation intensity of different temperature control zones according to the module temperature distribution of the power module group. This ensures the heat dissipation requirements of the high heat load zone while preventing condensation due to excessive heat dissipation in the low heat load zone, thereby improving the operating stability and service life of the frequency converter. Attached Figure Description

[0019] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0022] Figure 1 This is a schematic diagram of a heat dissipation device provided in an embodiment of this application; Figure 2 This is a schematic diagram showing the connection of various components in a heat dissipation device provided in an embodiment of this application; Figure 3 A flowchart illustrating a control method for a heat dissipation device provided in an embodiment of this application; Figure 4 A flowchart illustrating a control method for another heat dissipation device provided in an embodiment of this application; Figure 5 A flowchart illustrating a control method for yet another heat dissipation device provided in an embodiment of this application; Figure 6 A flowchart illustrating another control method for a heat dissipation device provided in an embodiment of this application; Figure 7 This is a schematic diagram of the structure of a control device for a heat dissipation device provided in an embodiment of this application; Figure 8 This is a schematic diagram of the structure of a frequency converter provided in an embodiment of this application; Figure 9 This is a schematic diagram of another heat dissipation device provided in an embodiment of this application; In the attached diagrams above: 101. First heat dissipation channel; 102. Second heat dissipation channel; 103. Second control component; 104. First control component; 105. Power module; 106. Heating module; 10. Acquisition Module; 20. Determination Module; 30. Control Module; 800. Frequency converter; 801. Heat dissipation equipment; 900. Heat dissipation device; 901. Processor; 902. Memory; 9021. Operating system; 9022. Application program; 903. User interface; 904. Network interface; 905. Bus system. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0024] The following disclosure provides numerous different embodiments or examples for implementing various structures of the invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of the invention. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed.

[0025] refer to Figure 1 As shown in the illustration, an embodiment of this application provides a heat dissipation device, including a first heat dissipation channel 101 and a second heat dissipation channel 102. This heat dissipation device is disposed in a frequency converter to dissipate heat from the power module group within the frequency converter. Due to the uneven temperature (i.e., heat load) distribution of the power module group, the power module group is divided into a first temperature control zone and a second temperature control zone, with different heat loads in the first and second temperature control zones. The power module group consists of multiple independent power modules 105 arranged in a row. The different heat loads can be understood as follows: one temperature control zone is a region with a higher heat load, meaning the power modules 105 in this temperature control zone generate more heat during operation; the other temperature control zone is a region with a lower heat load, meaning the power modules 105 in this temperature control zone generate less heat during operation. The heat load of the first temperature control zone is higher than that of the second temperature control zone. Furthermore, the two temperature control zones of the power module group can be divided according to the actual heat load of the power module group; this embodiment does not limit the method of dividing the two temperature control zones.

[0026] The first heat dissipation channel 101 covers the first temperature control area in the power module group. The first heat dissipation channel 101 is connected to the refrigeration circuit in the frequency converter through the first control component 104. That is, the inlet of the first heat dissipation channel 101 is connected to the refrigeration circuit in the frequency converter through the first control component 104, and the outlet of the first heat dissipation channel 101 is connected to the refrigeration circuit. The refrigeration circuit is a closed-loop system that provides low-temperature refrigerant to the heat dissipation equipment. It typically includes components such as a compressor, condenser, and throttling device to cool and reduce the temperature of the refrigerant that absorbs heat in the heat dissipation equipment, thereby realizing the recycling of the refrigerant.

[0027] The first heat dissipation channel 101 is used to transport the low-temperature refrigerant flowing out of the refrigeration circuit, and removes the heat generated by the power module 105 in the first temperature control area through heat exchange. The first control element 104 is usually an electronic expansion valve. By controlling the opening degree of the first control element 104, the refrigerant flow rate in the first heat dissipation channel 101 can be controlled, thereby adjusting the heat dissipation intensity of the first temperature control area.

[0028] The second heat dissipation channel 102 covers the second temperature control area in the power module group. The second heat dissipation channel 102 is connected to the cooling circuit through the second control component 103. That is, the inlet of the second heat dissipation channel 102 is connected to the cooling circuit through the second control component 103, and the outlet of the second heat dissipation channel 102 is connected to the cooling circuit. The second heat dissipation channel 102 and the first heat dissipation channel 101 are independent of each other and do not cross-flow.

[0029] The second heat dissipation channel 102 is used to transport the low-temperature refrigerant flowing out of the refrigeration circuit, and removes the heat generated by the power module 105 in the second temperature control area through heat exchange. The second control component 103 is usually an electronic expansion valve. By controlling the opening degree of the second control component 103, the refrigerant flow rate in the second heat dissipation channel 102 can be controlled, thereby adjusting the heat dissipation intensity of the second temperature control area.

[0030] Each power module 105 in the power module group has a heating module 106 on its surface, which is used to heat its corresponding power module 105. Specifically, when there is a risk of condensation on the power module, the heating module 106 on its surface is controlled to work to heat the power module 105.

[0031] This embodiment divides the power module group in the frequency converter into two independent temperature control zones according to the heat load distribution, and sets up independent first heat dissipation channels 101 and second heat dissipation channels 102 respectively. The refrigerant flow of the corresponding heat dissipation channels is controlled by two independent first control components 104 and second control components 103 respectively. This breaks through the limitations of the existing technology of single heat dissipation channel and uniform adjustment of heat dissipation intensity from the architecture.

[0032] When controlling the heat dissipation equipment, the module temperature of each power module 105 in the power module group can be obtained. Based on the comparison result between the module temperature of each power module 105 in the power module group and the target dew point temperature, the first control element 104 and the second control element 103 can be differentially controlled. The heat dissipation intensity of different temperature control areas can be dynamically adjusted according to the module temperature distribution of the power module group. This ensures the heat dissipation requirements of high heat load areas and prevents condensation from occurring in low heat load areas due to excessive heat dissipation, thereby improving the operating stability and service life of the frequency converter.

[0033] refer to Figure 3 , Figure 3This is a flowchart illustrating a control method for a heat dissipation device provided in an embodiment of this application. The control method for a heat dissipation device provided in this application includes the following steps: S301: Obtain the module temperature of each power module in the power module group.

[0034] S302: For each module temperature, determine the comparison result between the module temperature and the target dew point temperature.

[0035] S303: Based on all the comparison results obtained, control the first control element and the second control element.

[0036] Regarding steps S301 to S303 above, this method is applied to the processor in the aforementioned heat dissipation device. For details, please refer to... Figure 2 As shown, each power module in the power module group is equipped with a temperature sensor. The temperature signal of the corresponding power module is collected by the temperature sensor, and after signal conversion and filtering, the module temperature of each power module is obtained.

[0037] After obtaining the module temperature of each power module in the power module group, the target dew point temperature is determined by collecting the ambient temperature and humidity data of the internal environment and the external environment respectively through temperature and humidity sensors installed inside and outside the inverter.

[0038] After obtaining the target dew point temperature, the module temperature of each power module in the power module group is compared with the target dew point temperature to obtain the comparison result for each power module.

[0039] After obtaining the comparison results for each power module in the power module group, based on the obtained comparison results and the heat load distribution of the first and second temperature control areas, the opening degree of the first and second control components is differentially controlled, thereby reducing the risk of condensation in the power module group while achieving heat dissipation.

[0040] This embodiment provides a control method for a heat dissipation device. By acquiring the module temperature of each power module in the power module group, and based on the comparison results between the module temperature of each power module in the power module group and the target dew point temperature, the first control component and the second control component are differentially controlled. This method can dynamically adjust the heat dissipation intensity of different temperature control areas according to the module temperature distribution of the power module group, which not only ensures the heat dissipation requirements of high heat load areas, but also prevents condensation from occurring in low heat load areas due to excessive heat dissipation, thereby improving the operating stability and service life of the frequency converter.

[0041] refer to Figure 4 , Figure 4 A flowchart illustrating a control method for another heat dissipation device provided in an embodiment of this application. The control method for a heat dissipation device provided in an embodiment of this application includes the following steps: S401: Obtain the module temperature of each power module in the power module group.

[0042] S402: For each module temperature, determine the comparison result between the module temperature and the target dew point temperature.

[0043] Regarding steps S401 and S402, step S401 is the same as step S301, and step S402 is the same as step S302. For details, please refer to the descriptions of steps S301 and S302 above. This embodiment will not repeat them here.

[0044] S403: Determine each comparison result that satisfies the first preset condition from all the obtained comparison results.

[0045] S404: Count the number of all comparison results that satisfy the first preset condition.

[0046] S405: Determine the condensation risk type corresponding to the power module group based on the target number.

[0047] S406: Based on the condensation risk type, control the opening degree of the first control element and the second control element so that the power module group meets the second preset condition.

[0048] For steps S403 to S406 above, the first preset condition includes a comparison result where the module temperature is less than or equal to the target dew point temperature. This first preset condition is the determination rule for whether a single power module has a risk of condensation.

[0049] The condensation risk types include a first preset type and a second preset type. The first preset type indicates that there is a condensation risk in the entire power module group, while the second preset type indicates that there is a condensation risk in a localized part of the power module group. A general condensation risk can be understood as all power modules in the power module group being at risk of condensation, while a localized condensation risk can be understood as only a few power modules in the power module group being at risk of condensation.

[0050] The second preset condition includes that the module temperature of each power module in the power module group is greater than the target dew point temperature. This second preset condition is a pre-set judgment rule for eliminating condensation risk.

[0051] Specifically, after obtaining the comparison results between the module temperature and the target dew point temperature of each power module, all comparison results are iterated through, and all comparison results where the module temperature is less than or equal to the target dew point temperature (i.e., the first preset condition) are selected. The selected comparison results that meet the first preset condition are counted to obtain the total number of power modules with condensation risk (i.e., the target number). The counted target number is compared with a pre-set threshold, and the condensation risk type is classified according to the comparison results. After obtaining the condensation risk type, the corresponding control strategy is executed according to the different condensation risk types, thereby adjusting the opening degree of the first and second control components until the module temperature of each power module in the power module group is greater than the target dew point temperature, thus eliminating the condensation risk of the power module group.

[0052] In this embodiment, by counting the target number of power modules in the power module group that have condensation risk, the condensation risk type of the power module group is divided based on the target number. The opening degree of the first and second control components is adjusted differently based on the condensation risk type to achieve hierarchical control of the condensation risk of the power module group. This avoids the unreasonable control problem caused by the traditional uniform adjustment method and improves the reliability of heat dissipation control and the stability of inverter operation.

[0053] In one embodiment, the heat load distribution in the first temperature control zone is higher than that in the second temperature control zone. Step S406 specifically includes: When the condensation risk type is the first preset type, the opening degree of the first control component and the second control component is reduced so that the power module group meets the second preset condition. When the condensation risk type is the second preset type, the opening degree of the first control component is kept unchanged, and the opening degree of the second control component is reduced, so that the power module group meets the second preset condition.

[0054] The first preset type is used to indicate that there is a risk of condensation in the power module group as a whole, and the second preset type is used to indicate that there is a risk of condensation in a local part of the power module group.

[0055] Specifically, based on the actual temperature distribution of each power module in the power module group, it is pre-divided into a first temperature control zone with a higher heat load and a second temperature control zone with a lower heat load. Because the second temperature control zone has a lower heat load, it is more likely to experience condensation under continuous cooling. After determining the condensation risk type for each power module, if the condensation risk type is determined to be the first preset type, it indicates that the overall heat dissipation intensity of the entire power module group is excessive. At this time, the opening degree of the first and second control components is simultaneously reduced, and the refrigerant flow rate in both the first and second temperature control zones is decreased, rapidly increasing the overall temperature of the entire power module group until the module temperature of each power module in the power module group is higher than the target dew point temperature.

[0056] If the condensation risk type is determined to be the second preset type, it means that only the second temperature control area with a lower heat load has excessive heat dissipation intensity, while the temperature of the first temperature control area with a higher heat load is normal. Therefore, at this time, only the opening degree of the second control component is reduced to decrease the refrigerant flow in the second temperature control area and increase the temperature of the second temperature control area to eliminate the condensation risk. At the same time, the opening degree of the first control component is kept unchanged to ensure that the heat dissipation demand of the power module belonging to the first temperature control area is not affected.

[0057] Through the above methods, this embodiment adopts differentiated control strategies for two condensation conditions: overall condensation risk and localized condensation risk, based on the differences in condensation risk types of different power module groups. When overall condensation occurs, the first and second control components work together to rapidly raise the temperature. When localized condensation occurs, only the second control component in the low heat load area is adjusted. While quickly eliminating the condensation risk, it does not affect the normal heat dissipation of the power modules in the high heat load area. This solves the contradiction of not being able to balance heat dissipation and condensation prevention caused by the single control method in the prior art, and improves the accuracy of heat dissipation control and the reliability of inverter operation.

[0058] In another embodiment, when a heating module is provided on the surface of each power module in the power module group, step S406 specifically includes: From the power module group, identify the target power modules corresponding to each comparison result that satisfy the first preset condition; Based on the condensation risk type, the opening degree of the first and second control components is controlled, and the operation of the heating modules on the surface of each target power module is controlled so that the power module group meets the second preset condition.

[0059] In this process, when heating modules are installed on the surface of each power module in the power module group, the comparison results of the module temperature and target dew point temperature of all power modules are iterated, and all power modules that meet the first preset condition are selected and recorded as target power modules. Based on the determined condensation risk type, the refrigerant flow rate adjustment of the first and second heat dissipation channels and the control of the heating modules are executed simultaneously. Specifically: when the condensation risk type is the second preset type (i.e., localized condensation risk), only the opening degree of the second control component is reduced to decrease the heat dissipation intensity of the second temperature control area, while the heating modules on the surface of all target power modules are activated for localized heating to quickly increase the module temperature of the low-temperature power modules; when the condensation risk type is the first preset type (i.e., overall condensation risk), the opening degree of the first and second control components is reduced simultaneously to increase the global temperature of the power module group, while the heating modules on the surface of all target power modules are activated to accelerate the overall temperature increase.

[0060] It should be noted that after the power module group meets the second preset condition, all the heating modules that have been turned on are turned off, and the opening degree of the second control component is restored to the opening degree before adjustment.

[0061] In this embodiment, by configuring independent heating modules on the surface of each power module, an anti-condensation control system that combines dual-channel flow regulation and targeted heating is constructed. Local thermal compensation is applied only to target power modules with condensation risk, which can quickly shorten the response time for eliminating condensation risk and avoid ineffective heating of power modules without condensation risk, thereby reducing energy consumption.

[0062] The above, based on the target number, determines the condensation risk type corresponding to the power module group, including: When the number of targets is greater than or equal to a preset threshold, the condensation risk type corresponding to the power module group is determined to be the first preset type; When the number of targets is less than the preset threshold, the condensation risk type corresponding to the power module group is determined to be the second preset type.

[0063] The preset number threshold is a pre-defined critical quantity value used to distinguish between localized condensation risk and overall condensation risk. The preset number threshold can be set according to actual needs; this embodiment does not limit the specific value of the preset number threshold.

[0064] Specifically, after determining the target number of all comparison results that meet the first preset condition, the statistically obtained target number of power modules with condensation risk is compared with a pre-calibrated preset threshold. If the target number is greater than or equal to the preset threshold, it indicates that most power modules in the power module group have condensation risk, and the condensation risk type is determined to be the first preset type (i.e., overall condensation risk exists); if the target number is less than the preset threshold, it indicates that only a few power modules in the power module group have condensation risk, and the condensation risk is determined to be the second preset type (i.e., local condensation risk exists).

[0065] Through the above methods, this embodiment realizes the classification of condensation risk types corresponding to the power module group based on a preset number threshold, providing a reliable basis for the accurate execution of the differentiated control strategies of the first and second controllers, and further improving the accuracy of anti-condensation control and the stability of inverter operation.

[0066] The target dew point temperature described above can be determined as follows: The first ambient temperature and first ambient humidity corresponding to the internal environment of the frequency converter are obtained, and the second ambient temperature and second ambient humidity corresponding to the external environment of the frequency converter are obtained. Based on the first ambient temperature and the first ambient humidity, the first dew point temperature corresponding to the internal environment is determined, and based on the second ambient temperature and the second ambient humidity, the second dew point temperature corresponding to the external environment is determined. The maximum dew point temperature is determined from the first dew point temperature and the second dew point temperature; The maximum dew point temperature is determined as the target dew point temperature.

[0067] The first ambient temperature refers to the air temperature inside the inverter's internal cavity, which is collected by a temperature and humidity sensor installed inside the inverter's internal cavity. The first ambient humidity refers to the air temperature inside the inverter's internal cavity, which is also collected by a temperature and humidity sensor installed inside the inverter's internal cavity.

[0068] The second ambient temperature refers to the air temperature at the external air inlet of the inverter, which is collected by a temperature and humidity sensor installed at the external air inlet of the inverter. The second ambient humidity refers to the air humidity at the external air inlet of the inverter, which is also collected by a temperature and humidity sensor installed at the external air inlet of the inverter.

[0069] Specifically, when determining the target dew point temperature, the output signals from the temperature and humidity sensors inside the inverter's internal cavity and at the inverter's external air inlet are acquired. After filtering, the first ambient temperature and first ambient humidity corresponding to the inverter's internal environment, and the second ambient temperature and second ambient humidity corresponding to the inverter's external environment are obtained. The first ambient temperature and first ambient humidity are then substituted into the known dew point calculation formula to obtain the first dew point temperature corresponding to the internal environment. Similarly, the second ambient temperature and second ambient humidity are substituted into the known dew point calculation formula to obtain the second dew point temperature corresponding to the external environment.

[0070] The reason why condensation occurs on the surface of the power module is that when the temperature of the power module is lower than the ambient dew point temperature, the greater the temperature difference, the easier it is to form condensation. Therefore, the higher dew point temperature between the first dew point temperature and the second dew point temperature is selected as the target dew point temperature to ensure the reliability and accuracy of subsequent control.

[0071] By simultaneously collecting temperature and humidity data from both inside and outside the inverter, this embodiment calculates the dew point temperature of the internal and external environments, and takes the highest dew point temperature as the final target dew point temperature. This avoids the problem of missed condensation risk detection caused by single environment detection, improves the accuracy of condensation risk judgment, provides a reliable basis for subsequent anti-condensation control, and further ensures the reliability of inverter operation in complex and variable environments.

[0072] This embodiment provides a control method for a heat dissipation device. By acquiring the module temperature of each power module in the power module group, and based on the comparison results between the module temperature of each power module in the power module group and the target dew point temperature, the first control component and the second control component are differentially controlled. This method can dynamically adjust the heat dissipation intensity of different temperature control areas according to the module temperature distribution of the power module group, which not only ensures the heat dissipation requirements of high heat load areas, but also prevents condensation from occurring in low heat load areas due to excessive heat dissipation, thereby improving the operating stability and service life of the frequency converter.

[0073] refer to Figure 5 , Figure 5 This is a flowchart illustrating another control method for a heat dissipation device provided in an embodiment of this application. The control method for a heat dissipation device provided in this application includes the following steps: S501: Obtain the module temperature of each power module in the power module group.

[0074] S502: For each module temperature, determine the comparison result between the module temperature and the target dew point temperature.

[0075] S503: Determine each comparison result that satisfies the first preset condition from all the obtained comparison results.

[0076] S504: Count the number of all comparison results that meet the first preset condition.

[0077] S505: Determine the condensation risk type corresponding to the power module group based on the target number.

[0078] S506: Based on the condensation risk type, control the opening degree of the first control element and the second control element so that the power module group meets the second preset condition.

[0079] Regarding steps S501 to S506, steps S501 to S506 correspond one-to-one with steps S401 to S406 above. For details, please refer to the description of steps S401 to S406 above. This embodiment will not repeat the description here.

[0080] S507: When all the comparison results obtained are that the module temperature is greater than the target dew point temperature, determine the highest module temperature from all the obtained module temperatures.

[0081] S508: When the highest module temperature is greater than the first temperature threshold and less than the second temperature threshold, control to increase the opening degree of the first control element and the second control element so that the power module group meets the third preset condition.

[0082] Regarding steps S507 and S508 above, the first temperature threshold is the highest temperature at which the power module can operate safely. Its function is to set the target upper limit for heat dissipation control, ensuring that the operating temperature of each power module in the power module group is moderate and within a safe range, and avoiding performance degradation or shortened lifespan of the power module due to excessive temperature. The first temperature threshold can be set according to actual needs.

[0083] The second temperature threshold is the limit temperature at which the power module can operate. Exceeding this second temperature threshold will cause permanent damage to the power module. Its function is to set the emergency boundary for heat dissipation control. When the power module approaches this second temperature threshold, the strongest heat dissipation measures need to be taken immediately to prevent thermal runaway failure.

[0084] The opening adjustment range of the first control component is greater than that of the second control component. The opening adjustment range can be understood as the amount of change in the opening of the first or second control component per unit time, reflecting the adjustment speed of the heat dissipation intensity. Its function is to achieve differentiated adjustment of the heat dissipation intensity of the first and second heat dissipation channels.

[0085] The third preset condition includes ensuring that the module temperature of each power module in the power module group is less than or equal to the first temperature threshold. This third preset condition is the ultimate goal of heat dissipation control, avoiding excessive heat dissipation that leads to energy waste and potential condensation risks.

[0086] Specifically, after comparing the module temperature of each power module in the power module group with the target dew point temperature, all comparison results are iterated. When all comparison results show that the module temperature is greater than the target dew point temperature, it is determined that there is no risk of condensation in the current power module group. The highest module temperature is determined from all the module temperatures and used as the basis for determining the current heat dissipation requirements of the power module group. The highest module temperature is compared with a first temperature threshold and a second temperature threshold. When the highest module temperature is greater than the first temperature threshold but less than the second temperature threshold, enhanced heat dissipation control needs to be activated. The opening of both the first and second control components is increased simultaneously, with the adjustment range of the first control component being greater than that of the second control component. Since the first control component controls the first heat dissipation channel covering the power modules with higher loads, while the second control component only controls the second heat dissipation channel covering the power modules with lower loads, this differentiated adjustment can prioritize the enhancement of heat dissipation in areas with higher heat loads, quickly reducing the module temperature in that area. The module temperature of each power module in the power module group is continuously collected. When all module temperatures are less than or equal to the first temperature threshold, enhanced heat dissipation control is stopped, and normal heat dissipation regulation logic is restored.

[0087] In this embodiment, under the condition that there is no risk of condensation in the power module group, enhanced heat dissipation control is implemented based on the highest module temperature in the power module group. By differentially adjusting the opening degree of the first control component and the second control component, the adjustment range of the first control component is increased first, which can quickly reduce the temperature of the power module in the high heat load area, avoid damage to the power module due to overheating, and at the same time avoid excessive heat dissipation of the power module in the low heat load area, thereby reducing energy consumption while ensuring heat dissipation effect.

[0088] S509: When the highest module temperature is less than or equal to the first temperature threshold, determine the lowest module temperature from all the obtained module temperatures.

[0089] S510: Based on the first preset PID algorithm, control the opening degree of the first control component so that the highest module temperature reaches the third temperature threshold; and based on the second preset PID algorithm, control the opening degree of the second control component so that the lowest module temperature reaches the fourth temperature threshold.

[0090] Regarding steps S509 and S510 above, the first preset PID algorithm is a pre-set proportional-integral-derivative control algorithm for controlling the opening degree of the first control component. By dynamically adjusting the opening degree of the first control component, the highest module temperature in the power module group is stabilized at the set safe operating temperature.

[0091] The second preset PID algorithm is a proportional-integral-derivative control algorithm that is pre-set to control the opening degree of the second control component. By dynamically adjusting the opening degree of the second control component, the highest module temperature of the power module group is stabilized at the set non-condensing temperature.

[0092] The third temperature threshold is the target temperature to ensure the safe operation of the power module group. The third temperature threshold is lower than the first temperature threshold. Its function is to set the steady-state target of heat dissipation control during normal heat dissipation control, so as to ensure the safe operation of the power module group while taking into account the service life of the power module group.

[0093] The fourth temperature threshold is the target temperature to ensure that the power module has no risk of condensation. The fourth temperature threshold is greater than the target dew point temperature. When it is active, it sets the steady-state target of anti-condensation control during normal heat dissipation control, leaving sufficient safety margin for anti-condensation and avoiding the risk of condensation due to temperature fluctuations.

[0094] Specifically, after determining the highest module temperature, if all the comparison results show that the module temperature is greater than the target dew point temperature and the highest module temperature is less than or equal to the first temperature threshold, it indicates that the current power module group has neither condensation risk nor overheating risk, and at this time, it enters the normal steady-state heat dissipation control process. The lowest module temperature is extracted from the module temperatures of all power modules.

[0095] The highest module temperature is compared with the third temperature threshold using the first preset PID algorithm. Based on the deviation between the highest module temperature and the third temperature threshold, the opening adjustment of the first control component is calculated, thereby dynamically adjusting the opening of the first control component so that the highest module temperature gradually approaches and stabilizes at the third temperature threshold.

[0096] The lowest module temperature is compared with the fourth temperature threshold using the second preset PID algorithm. Based on the deviation between the lowest module temperature and the fourth temperature threshold, the opening adjustment of the second control component is calculated, thereby dynamically adjusting the opening of the second control component so that the lowest module temperature gradually approaches and stabilizes at the fourth temperature threshold.

[0097] Through the above methods, this embodiment employs two independent PID algorithms to perform closed-loop control on the highest and lowest module temperatures under normal steady-state operation of the frequency converter. This stabilizes the highest module temperature at a safe and efficient operating target temperature (i.e., the third temperature threshold) and the lowest module temperature at a non-condensing target temperature with a safety margin (i.e., the fourth temperature threshold). This achieves a dynamic balance between heat dissipation and anti-condensation requirements, improves the steady-state accuracy of temperature control, and avoids the risk of power module life degradation and condensation caused by large temperature fluctuations.

[0098] It should be noted that if the highest module temperature is greater than or equal to the second temperature threshold, it indicates that the power module group is at risk of overheating and damage, and an alarm will be issued at this time.

[0099] In the above, in step S509, in order to achieve more accurate control, when the highest module temperature is greater than the first temperature threshold and less than the second temperature threshold, the target temperature control area to which the power module corresponding to the highest module temperature belongs is determined, the number of all power modules in the power module group whose module temperature is greater than the first temperature threshold and less than the second temperature threshold is determined, and the average temperature among the module temperatures of all modules in the power module group is determined. When the number of modules is less than a preset threshold, the target total adjustment required for heat dissipation of the power module group is determined based on the average temperature, the first temperature threshold, and the highest module temperature. Based on the target total adjustment amount and the target temperature control area, determine the first adjustment amount corresponding to the first control element and the second adjustment amount corresponding to the second control element; Control the opening degree of the first control element to a first adjustment amount and control the opening degree of the second control element to a second adjustment amount; When the number of modules is greater than or equal to a preset threshold, the opening degree of the first and second control components is controlled to the maximum opening degree.

[0100] In the above, the target temperature control area includes a first temperature control area and a second temperature control area. The target adjustment amount = first proportional coefficient × (average temperature - first temperature threshold) + second proportional coefficient × (highest module temperature - first temperature threshold). The first and second proportional coefficients can be set according to actual needs, and this embodiment does not limit them.

[0101] If the highest module temperature occurs in the power module in the first temperature control zone, the target adjustment amount is allocated according to the first adjustment ratio corresponding to the first control element and the second adjustment ratio corresponding to the second control element to obtain the first adjustment amount corresponding to the first control element and the second adjustment amount corresponding to the second control element. If the first adjustment amount is higher than the second adjustment amount, the opening degree of the first control element is increased first to quickly remove a large amount of heat from the power module, while the opening degree of the second control element is increased slightly to assist in enhancing heat dissipation.

[0102] If the highest module temperature occurs in the power module in the second temperature control zone, the target adjustment amount is allocated according to the third adjustment ratio corresponding to the first control element and the fourth adjustment ratio corresponding to the second control element to obtain the first adjustment amount corresponding to the first control element and the second adjustment amount corresponding to the second control element. The third preset adjustment ratio is lower than the first preset adjustment ratio, the fourth preset adjustment ratio is higher than the second preset adjustment ratio, and the first adjustment amount is lower than the second adjustment amount. At this time, the adjustment range of the first control element is appropriately reduced to avoid the low heat load power module in the first temperature control zone from experiencing a rapid temperature drop due to excessive cooling intensity, which could cause condensation. At the same time, the adjustment range of the second control element is increased to improve the heat dissipation capacity of the power module in this zone. Throughout the adjustment process, the lowest module temperature of the power module group is continuously monitored to ensure that it is always higher than the target dew point temperature.

[0103] If the number of modules is greater than or equal to the preset number threshold, it is determined that all modules are overheated. The first control and the second control are then fully opened to the maximum degree until the temperature of all modules is less than or equal to the first temperature threshold.

[0104] By using the above methods, this embodiment dynamically allocates the adjustment ratio of the dual control components according to the different temperature control zones where the highest module temperature is located, and directly turns on both control components when the entire module is severely overheated. This can meet the heat dissipation requirements of the corresponding temperature control zone while avoiding the risk of condensation in low heat load zones, quickly and reliably eliminating various overheating conditions, and improving the safety and reliability of the power module group's heat dissipation control.

[0105] This embodiment provides a control method for a heat dissipation device. By acquiring the module temperature of each power module in the power module group, and based on the comparison results between the module temperature of each power module in the power module group and the target dew point temperature, the first control component and the second control component are differentially controlled. This method can dynamically adjust the heat dissipation intensity of different temperature control areas according to the module temperature distribution of the power module group, which not only ensures the heat dissipation requirements of high heat load areas, but also prevents condensation from occurring in low heat load areas due to excessive heat dissipation, thereby improving the operating stability and service life of the frequency converter.

[0106] The following is an example for reference. Figure 6 This section details the control flow of the entire heat dissipation device. In this example, the heat dissipation device includes a first heat dissipation channel covering the first temperature-controlled area of ​​the power module group and a second heat dissipation channel covering the second temperature-controlled area of ​​the power module group. The heat load of the first temperature-controlled area is higher than that of the second temperature-controlled area. The first heat dissipation channel is connected to the cooling circuit in the frequency converter through a first control component, and the second heat dissipation channel is connected to the cooling circuit through a second control component. Heating modules are avoided in each power module of the power module group. The specific control flow is as follows: The first ambient temperature and first ambient humidity of the internal environment of the frequency converter and the second ambient temperature and second ambient humidity of the external environment of the frequency converter are obtained. Based on the first ambient temperature and the first ambient humidity, determine the first dew point temperature corresponding to the internal environment, and based on the second ambient temperature and the second ambient humidity, determine the second dew point temperature corresponding to the external environment. The maximum dew point temperature is determined from the first dew point temperature and the second dew point temperature, and is used as the target dew point temperature. Obtain the module temperature of each power module in the power module group; Determine whether the temperature of each module is greater than the target dew point temperature; If the temperature of each module is greater than the target dew point temperature, determine the highest module temperature from among the module temperatures; Determine whether the highest module temperature is greater than or equal to the second temperature threshold. If the highest module temperature is greater than or equal to the second temperature threshold, an alarm will be triggered. If the highest module temperature is greater than the first temperature threshold but less than the second temperature threshold, the opening degree of the first and second control components is increased so that the power module group meets the third preset condition.

[0107] If the highest module temperature is less than or equal to the first temperature threshold, the lowest module temperature is determined from all module temperatures. Based on the first preset PID algorithm, the opening degree of the first control component is controlled so that the highest module temperature reaches the third temperature threshold; and based on the second preset PID algorithm, the opening degree of the second control component is controlled so that the lowest module temperature reaches the fourth temperature threshold. If the temperature of each module is not uniformly greater than the target dew point temperature, count the number of modules whose temperature is less than or equal to the target dew point temperature. Based on the target number, determine the condensation risk type corresponding to the power module group; Based on the type of condensation risk, the opening degree of the first and second control components is controlled so that the power module group meets the second preset condition.

[0108] refer to Figure 7 , Figure 7This is a schematic diagram of a control device for a heat dissipation device provided in an embodiment of this application. The heat dissipation device includes a first heat dissipation channel covering a first temperature control area in a power module group and a second heat dissipation channel covering a second temperature control area in the same power module group. The first heat dissipation channel is connected to a cooling circuit via a first control element, and the second heat dissipation channel is connected to the cooling circuit via a second control element. The heat loads of the first and second temperature control areas are different. The device includes: an acquisition module 10, a determination module 20, and a control module 30. The acquisition module 10 is used to acquire the module temperature of each power module in the power module group; the determination module 20 is used to determine a comparison result between the module temperature and a target dew point temperature for each module temperature; and the control module 30 is used to control the first and second control elements based on all the obtained comparison results.

[0109] In this embodiment, the control module 30 is further configured to: From all the obtained comparison results, determine each comparison result that satisfies a first preset condition, the first preset condition including that the comparison result is that the module temperature is less than or equal to the target dew point temperature; Count the target number of all comparison results that satisfy the first preset condition; Based on the target number, determine the condensation risk type corresponding to the power module group; Based on the condensation risk type, the opening degree of the first control element and the second control element is controlled so that the power module group meets the second preset condition. The second preset condition includes that the module temperature corresponding to each power module in the power module group is greater than the target dew point temperature.

[0110] In this embodiment, the heat load of the first temperature control zone is higher than the heat load of the second temperature control zone; the control module 30 is further configured to: When the condensation risk type is the first preset type, the opening degree of the first control element and the second control element is reduced so that the power module group meets the second preset condition. The first preset type is used to indicate that the power module group as a whole has a condensation risk. When the condensation risk type is the second preset type, the opening degree of the first control component is kept unchanged, and the opening degree of the second control component is reduced, so that the power module group meets the second preset condition. The second preset type is used to indicate that there is a condensation risk in a local area of ​​the power module group.

[0111] In this embodiment, the control module 30 is further configured to: When the number of targets is greater than or equal to a preset threshold, the condensation risk type corresponding to the power module group is determined to be the first preset type; When the number of targets is less than the preset number threshold, the condensation risk type corresponding to the power module group is determined to be the second preset type.

[0112] In this embodiment, each power module in the power module group is provided with a heating module on its surface; the control module 30 is further configured to: From the power module group, determine the target power modules corresponding to each comparison result that satisfies the first preset condition; Based on the condensation risk type, the opening degree of the first control element and the second control element is controlled, and the heating module on the surface of each target power module is controlled to work, so that the power module group meets the second preset condition.

[0113] In this embodiment, the power module group is disposed within the frequency converter, and the determining module 20 is further used for: The first ambient temperature and first ambient humidity corresponding to the internal environment of the frequency converter are obtained, and the second ambient temperature and second ambient humidity corresponding to the external environment of the frequency converter are obtained. Based on the first ambient temperature and the first ambient humidity, a first dew point temperature corresponding to the internal environment is determined, and based on the second ambient temperature and the second ambient humidity, a second dew point temperature corresponding to the external environment is determined. The maximum dew point temperature is determined from the first dew point temperature and the second dew point temperature; The maximum dew point temperature is determined as the target dew point temperature.

[0114] In this embodiment, the control module 30 is further configured to: When all the obtained comparison results show that the module temperature is greater than the target dew point temperature, the highest module temperature is determined from all the obtained module temperatures. When the highest module temperature is greater than the first temperature threshold and less than the second temperature threshold, the opening degree of the first control element and the second control element is increased so that the power module group meets the third preset condition. Wherein, the first temperature threshold is the highest temperature at which the power module can operate safely, the second temperature threshold is the limit temperature at which the power module is allowed to operate, the opening adjustment range of the first control component is greater than the opening adjustment range of the second control component, and the third preset condition includes that the module temperature corresponding to each power module in the power module group is less than or equal to the first temperature threshold.

[0115] In this embodiment, the control module 30 is further configured to: After determining the highest module temperature, when the highest module temperature is less than or equal to the first temperature threshold, the lowest module temperature is determined from all the obtained module temperatures. Based on a first preset PID algorithm, the opening degree of the first control component is controlled so that the highest module temperature reaches a third temperature threshold; and based on a second preset PID algorithm, the opening degree of the second control component is controlled so that the lowest module temperature reaches a fourth temperature threshold. The third temperature threshold is the target temperature to ensure the safe operation of the power module group, and the third temperature threshold is less than the first temperature threshold. The fourth temperature threshold is the target temperature to ensure that the power module group has no risk of condensation, and the fourth temperature threshold is greater than the target dew point temperature.

[0116] This embodiment provides a control device for a heat dissipation device. By acquiring the module temperature of each power module in the power module group, and based on the comparison results between the module temperature of each power module in the power module group and the target dew point temperature, the device performs differentiated control on the first control component and the second control component. This allows for dynamic adjustment of the heat dissipation intensity of different temperature control areas according to the module temperature distribution of the power module group. This ensures the heat dissipation requirements of high heat load areas while preventing condensation from occurring in low heat load areas due to excessive heat dissipation, thereby improving the operational stability and service life of the frequency converter.

[0117] refer to Figure 8 , Figure 8 This is a schematic diagram of the structure of a frequency converter provided in an embodiment of this application. The frequency converter 800 provided in this embodiment of the application is an energy-saving frequency converter, which includes the heat dissipation device 801 as described above.

[0118] Figure 9 This is a schematic diagram of a heat dissipation device provided in an embodiment of this application. Figure 9 The heat dissipation device 900 shown includes: at least one processor 901, a memory 902, at least one network interface 904, and other user interfaces 903. The various components in the heat dissipation device 900 are coupled together via a bus system 905. It is understood that the bus system 905 is used to implement communication between these components. In addition to a data bus, the bus system 905 also includes a power bus, a control bus, and a status signal bus. However, for clarity, ... Figure 9 The general labeled all buses as Bus System 905.

[0119] The user interface 903 may include a display, keyboard, or clicking device (e.g., mouse, trackball, touchpad, or touchscreen).

[0120] It is understood that the memory 902 in the embodiments of the present invention can be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory. The non-volatile memory can be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), or flash memory. The volatile memory can be random access memory (RAM), which is used as an external cache. By way of example, but not limitation, many forms of RAM are available, such as Static Random Access Memory (SRAM), Dynamic Random Access Memory (DRAM), Synchronous DRAM (SDRAM), Double Data Rate SDRAM (DDRSDRAM), Enhanced Synchronous DRAM (ESDRAM), Synchronous Link DRAM (SLDRAM), and Direct Rambus RAM (DRRAM). The memory 902 described herein is intended to include, but is not limited to, these and any other suitable types of memory.

[0121] In some implementations, memory 902 stores elements, executable units or data structures, or subsets thereof, or extended sets thereof: operating system 9021 and application program 9022.

[0122] The operating system 9021 includes various system programs, such as the framework layer, core library layer, and driver layer, used to implement various basic business functions and handle hardware-based tasks. The application program 9022 includes various applications, such as a media player and a browser, used to implement various application functions. The program implementing the method of this embodiment can be included in the application program 9022.

[0123] In this embodiment of the invention, the processor 901 executes the method steps provided in each method embodiment by calling the program or instructions stored in the memory 902, specifically the program or instructions stored in the application program 9022.

[0124] The methods disclosed in the above embodiments of the present invention can be applied to or implemented by processor 901. Processor 901 may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the above method can be completed by the integrated logic circuit of the hardware or by instructions in the form of software in processor 901. The processor 901 may be a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components. It can implement or execute the methods, steps, and logic block diagrams disclosed in the embodiments of the present invention. The general-purpose processor may be a microprocessor or any conventional processor. The steps of the methods disclosed in the embodiments of the present invention can be directly embodied in the execution of a hardware decoding processor, or executed by a combination of hardware and software units in the decoding processor. The software units may be located in random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, registers, or other mature storage media in the art. The storage medium is located in memory 902. Processor 901 reads the information in memory 902 and, in conjunction with its hardware, completes the steps of the above method.

[0125] It is understood that the embodiments described herein can be implemented in hardware, software, firmware, middleware, microcode, or a combination thereof. For hardware implementation, the processing unit can be implemented in one or more application-specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field-programmable gate arrays (FPGAs), general-purpose processors, controllers, microcontrollers, microprocessors, other electronic units for performing the functions described herein, or combinations thereof.

[0126] For software implementation, the techniques described herein can be implemented by units that perform the functions described herein. The software code can be stored in memory and executed by a processor. The memory can be implemented in the processor or external to the processor.

[0127] The heat dissipation device provided in this embodiment can be as follows: Figure 9 The heat dissipation device shown can perform the following functions: Figures 3-6 All steps of the control method for heat dissipation equipment, thereby achieving Figures 3-6 For details on the technical effects of the control method for the heat dissipation device shown, please refer to [link / reference]. Figures 3-6 The relevant descriptions are presented concisely and will not be elaborated upon here.

[0128] This invention also provides a storage medium (computer-readable storage medium). This storage medium stores one or more programs. The storage medium may include volatile memory, such as random access memory; it may also include non-volatile memory, such as read-only memory, flash memory, hard disk, or solid-state drive; and it may also include combinations of the above types of memory.

[0129] When one or more programs in the storage medium can be executed by one or more processors to implement the control method of the heat dissipation device executed on the control device side of the heat dissipation device.

[0130] Those skilled in the art will further recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of both. To clearly illustrate the interchangeability of hardware and software, the components and steps of the various examples have been generally described in terms of functionality in the foregoing description. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementations should not be considered beyond the scope of this invention.

[0131] The steps of the methods or algorithms described in conjunction with the embodiments disclosed herein can be implemented in hardware, a software module executed by a processor, or a combination of both. The software module can be located in random access memory (RAM), main memory, read-only memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, removable disk, CD-ROM, or any other form of storage medium known in the art.

[0132] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A control method for a heat dissipation device, characterized in that, The heat dissipation device includes a first heat dissipation channel covering a first temperature control area in the power module group and a second heat dissipation channel covering a second temperature control area in the power module group. The first heat dissipation channel is connected to a cooling circuit via a first control component, and the second heat dissipation channel is connected to the cooling circuit via a second control component. The heat loads of the first temperature control area and the second temperature control area are different. The method includes: Obtain the module temperature of each power module in the power module group; For each module temperature, determine the comparison result between the module temperature and the target dew point temperature; Based on all the obtained comparison results, the first control element and the second control element are controlled.

2. The method according to claim 1, characterized in that, The control of the first control element and the second control element based on all the obtained comparison results includes: From all the obtained comparison results, determine each comparison result that satisfies a first preset condition, the first preset condition including that the comparison result is that the module temperature is less than or equal to the target dew point temperature; Count the target number of all comparison results that satisfy the first preset condition; Based on the target number, determine the condensation risk type corresponding to the power module group; Based on the condensation risk type, the opening degree of the first control element and the second control element is controlled so that the power module group meets the second preset condition. The second preset condition includes that the module temperature corresponding to each power module in the power module group is greater than the target dew point temperature.

3. The method according to claim 2, characterized in that, The heat load of the first temperature control zone is higher than the heat load of the second temperature control zone; The control of the opening degree of the first and second control components based on the condensation risk type, so that the power module group meets the second preset condition, includes: When the condensation risk type is the first preset type, the opening degree of the first control element and the second control element is reduced so that the power module group meets the second preset condition. The first preset type is used to indicate that the power module group as a whole has a condensation risk. When the condensation risk type is the second preset type, the opening degree of the first control component is kept unchanged, and the opening degree of the second control component is reduced, so that the power module group meets the second preset condition. The second preset type is used to indicate that there is a condensation risk in a local area of ​​the power module group.

4. The method according to claim 3, characterized in that, The determination of the condensation risk type corresponding to the power module group based on the target number includes: When the number of targets is greater than or equal to a preset threshold, the condensation risk type corresponding to the power module group is determined to be the first preset type; When the number of targets is less than the preset number threshold, the condensation risk type corresponding to the power module group is determined to be the second preset type.

5. The method according to claim 2, characterized in that, Each power module in the power module group is provided with a heating module on its surface; The control of the opening degree of the first and second control components based on the condensation risk type, so that the power module group meets the second preset condition, includes: From the power module group, determine the target power modules corresponding to each comparison result that satisfies the first preset condition; Based on the condensation risk type, the opening degree of the first control element and the second control element is controlled, and the heating module on the surface of each target power module is controlled to work, so that the power module group meets the second preset condition.

6. The method according to claim 1, characterized in that, The power module group is installed inside the frequency converter; The target dew point temperature is determined in the following manner: The first ambient temperature and first ambient humidity corresponding to the internal environment of the frequency converter are obtained, and the second ambient temperature and second ambient humidity corresponding to the external environment of the frequency converter are obtained. Based on the first ambient temperature and the first ambient humidity, a first dew point temperature corresponding to the internal environment is determined, and based on the second ambient temperature and the second ambient humidity, a second dew point temperature corresponding to the external environment is determined. The maximum dew point temperature is determined from the first dew point temperature and the second dew point temperature; The maximum dew point temperature is determined as the target dew point temperature.

7. The method according to claim 1, characterized in that, The heat load of the first temperature control zone is higher than the heat load of the second temperature control zone; The control of the first control element and the second control element based on all the obtained comparison results includes: When all the obtained comparison results show that the module temperature is greater than the target dew point temperature, the highest module temperature is determined from all the obtained module temperatures. When the highest module temperature is greater than the first temperature threshold and less than the second temperature threshold, the opening degree of the first control element and the second control element is increased so that the power module group meets the third preset condition. Wherein, the first temperature threshold is the highest temperature at which the power module can operate safely, the second temperature threshold is the limit temperature at which the power module is allowed to operate, the opening adjustment range of the first control component is greater than the opening adjustment range of the second control component, and the third preset condition includes that the module temperature corresponding to each power module in the power module group is less than or equal to the first temperature threshold.

8. The method according to claim 7, characterized in that, After determining the highest module temperature, the method further includes: When the highest module temperature is less than or equal to the first temperature threshold, the lowest module temperature is determined from all the obtained module temperatures; Based on a first preset PID algorithm, the opening degree of the first control component is controlled so that the highest module temperature reaches a third temperature threshold; and based on a second preset PID algorithm, the opening degree of the second control component is controlled so that the lowest module temperature reaches a fourth temperature threshold. The third temperature threshold is the target temperature to ensure the safe operation of the power module group, and the third temperature threshold is less than the first temperature threshold. The fourth temperature threshold is the target temperature to ensure that the power module group has no risk of condensation, and the fourth temperature threshold is greater than the target dew point temperature.

9. A control device for a heat dissipation equipment, characterized in that, The heat dissipation device includes a first heat dissipation channel covering a first temperature control area in the power module group and a second heat dissipation channel covering a second temperature control area in the power module group. The first heat dissipation channel is connected to the cooling circuit via a first control component, and the second heat dissipation channel is connected to the cooling circuit via a second control component. The heat loads of the first temperature control area and the second temperature control area are different. The device includes: An acquisition module is used to acquire the module temperature of each power module in the power module group; A determining module is used to determine a comparison result between the module temperature and the target dew point temperature for each module temperature; A control module is used to control the first control element and the second control element based on all the obtained comparison results.

10. A heat dissipation device, characterized in that, include: The first heat dissipation channel covering the first temperature control area of ​​the power module group and the second heat dissipation channel covering the second temperature control area of ​​the power module group, the processor and the memory; The first heat dissipation channel is connected to the refrigeration circuit through the first control component, and the second heat dissipation channel is connected to the refrigeration circuit through the second control component. The heat loads of the first temperature control area and the second temperature control area are different. The processor is used to execute the control program of the heat dissipation device stored in the memory to implement the control method of the heat dissipation device according to any one of claims 1 to 8.

11. A frequency converter, characterized in that, Includes the heat dissipation device as described in claim 10.

12. A storage medium, characterized in that, The storage medium stores one or more programs, which can be executed by one or more processors to implement the control method of the heat dissipation device according to any one of claims 1 to 8.

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