CN113905594A - Heat dissipation control method and device of frequency converter power module, medium and radiator - Google Patents
Heat dissipation control method and device of frequency converter power module, medium and radiator Download PDFInfo
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- CN113905594A CN113905594A CN202111265846.4A CN202111265846A CN113905594A CN 113905594 A CN113905594 A CN 113905594A CN 202111265846 A CN202111265846 A CN 202111265846A CN 113905594 A CN113905594 A CN 113905594A
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- 230000017525 heat dissipation Effects 0.000 title claims abstract description 110
- 238000000034 method Methods 0.000 title claims abstract description 55
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 213
- 239000003507 refrigerant Substances 0.000 claims description 151
- 239000002826 coolant Substances 0.000 claims description 11
- 238000004590 computer program Methods 0.000 claims description 8
- 238000010586 diagram Methods 0.000 description 14
- 238000007710 freezing Methods 0.000 description 9
- 230000008014 freezing Effects 0.000 description 9
- 238000004321 preservation Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 230000005494 condensation Effects 0.000 description 4
- 238000009833 condensation Methods 0.000 description 4
- 230000002159 abnormal effect Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 230000006870 function Effects 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000005855 radiation Effects 0.000 description 3
- 238000005070 sampling Methods 0.000 description 3
- 230000032683 aging Effects 0.000 description 2
- 238000009529 body temperature measurement Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
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- 230000003287 optical effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/20218—Modifications to facilitate cooling, ventilating, or heating using a liquid coolant without phase change in electronic enclosures
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/89—Arrangement or mounting of control or safety devices
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/20218—Modifications to facilitate cooling, ventilating, or heating using a liquid coolant without phase change in electronic enclosures
- H05K7/20272—Accessories for moving fluid, for expanding fluid, for connecting fluid conduits, for distributing fluid, for removing gas or for preventing leakage, e.g. pumps, tanks or manifolds
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/20218—Modifications to facilitate cooling, ventilating, or heating using a liquid coolant without phase change in electronic enclosures
- H05K7/20281—Thermal management, e.g. liquid flow control
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Abstract
The invention provides a heat dissipation control method, a heat dissipation control device, a medium and a heat radiator of a frequency converter power module, wherein the method comprises the following steps: a chilled water loop is arranged on a radiator of the frequency converter power module; chilled water inlet department and the chilled water exit department in chilled water return circuit respectively connect a chilled water valve the chilled water exit with be equipped with the water pump between the chilled water valve, through control the chilled water valve with the chilled water circulation can be realized to the water pump. The scheme provided by the invention can be used for maximizing the energy efficiency and prolonging the service life of equipment components.
Description
Technical Field
The invention relates to the field of control, in particular to a heat dissipation control method, a heat dissipation control device, a heat dissipation medium and a heat dissipation device for a frequency converter power module.
Background
Along with the improvement of living standard of people, the use of a central air conditioner in engineering is more and more popular, the concept of energy saving, comfort and environmental protection of a variable frequency air conditioner becomes a consensus of people, along with the development of technology, the frequency converter product is developed in the direction of modularization, small volume and high integration degree on the basis of ensuring the reliability of the frequency converter product, the module heat dissipation liquid cooling heat dissipation is more suitable for the development trend than the air cooling heat dissipation, so the frequency converter for air conditioning at the present stage mostly uses a refrigerant to dissipate heat for the frequency converter, the current market, hotel, rail transit and other types of engineering load change greatly, the working condition change of a unit is large, the heat dissipation of the frequency converter is also tested because the change of the working condition and the heat dissipation liquid taking of the frequency converter are in a nonlinear relationship, and because a power module (IGBT, IPM) is a core device of the frequency converter, if the frequency converter works in an overheated environment for a long time, short circuit and aging failure of elements are easily caused, this brings about a safety hazard to the safe operation of the frequency converter, and if the heat dissipation temperature is too low, dew is easily formed, and also brings about a safety hazard to the device, so the temperature regulation of the power module is very important.
Disclosure of Invention
The invention mainly aims to overcome the defects of the related technologies and provides a heat dissipation control method, a heat dissipation control device, a medium and a heat sink of a frequency converter power module so as to solve the problem of insufficient heat dissipation caused by insufficient liquid taking of a refrigerant under the conditions of low pressure difference and high load in the related technologies.
One aspect of the present invention provides a heat sink for a power module of a frequency converter, including: a chilled water loop is arranged on a radiator of the frequency converter power module; chilled water inlet department and/or chilled water outlet department in chilled water return circuit are connected with the chilled water valve the chilled water outlet with be equipped with the water pump between the chilled water valve that chilled water outlet department connects, through control the chilled water valve with the water pump can realize the chilled water circulation.
The invention also provides a heat dissipation control method of a frequency converter power module, wherein the frequency converter power module comprises the frequency converter power module radiator, and the heat dissipation control method is characterized by comprising the following steps: when the equipment where the frequency converter is located runs, judging whether the radiator can normally carry out refrigerant heat dissipation according to the temperature value of the power module; and if the radiator cannot normally carry out refrigerant heat dissipation, controlling the water pump and the chilled water valve to be opened so as to carry out auxiliary heat dissipation through chilled water circulation.
Optionally, before judging that the heat sink cannot normally perform coolant heat dissipation and controlling the water pump and the chilled water valve to be opened, the method further includes: controlling the opening degree of a refrigerant valve of the radiator to be gradually increased, and judging whether the temperature value of the power module is still increased; and if the temperature value of the power module is still increased when the opening degree of the refrigerant valve is controlled to be increased to the maximum, controlling the water pump and the chilled water valve to be opened.
Optionally, the method further comprises: under the condition that the radiator cannot normally radiate the coolant, judging whether the temperature of the power module is smaller than the lower limit value of a preset temperature range; and if the temperature value of the power module is smaller than the lower limit value of the preset temperature range, controlling the opening degree of a refrigerant inlet valve of the radiator to be gradually reduced until the temperature value of the power module is within the preset temperature range.
Optionally, the method further comprises: and if the temperature value of the power module is still not within the preset temperature range when the opening of the refrigerant inlet valve is controlled to be reduced to the minimum, closing the refrigerant inlet valve, and controlling the water pump and the chilled water valve to be opened.
Optionally, the method further comprises: and after the water pump and the chilled water valve are controlled to be opened, controlling the frequency of the water pump according to the temperature value of the power module until the temperature of the power module is within a preset temperature range.
Optionally, if it is determined that the radiator can perform coolant heat dissipation normally, the water pump is controlled to evacuate chilled water in the chilled water loop of the radiator.
The invention also provides a heat dissipation control device of a frequency converter power module, wherein the frequency converter power module comprises the frequency converter power module radiator, and the heat dissipation control device is characterized by comprising: the judging unit is used for judging whether the radiator can normally radiate the refrigerant according to the temperature value of the power module when the equipment where the frequency converter is located runs; and the control unit is used for controlling the water pump and the chilled water valve to be opened if the judgment unit judges that the radiator can not normally carry out refrigerant heat dissipation so as to carry out auxiliary heat dissipation through chilled water circulation.
Optionally, the control unit is further configured to: before the judging unit judges that the radiator can not normally carry out refrigerant heat dissipation and controls the water pump and the chilled water valve to be opened, the opening degree of a refrigerant valve of the radiator is controlled to be gradually increased; the judging unit is further configured to: judging whether the temperature value of the power module is still increased;
the control unit is further configured to: and if the temperature value of the power module is still increased when the opening degree of the refrigerant valve is controlled to be increased to the maximum, controlling the water pump and the chilled water valve to be opened.
Optionally, the determining unit is further configured to: under the condition that the radiator cannot normally radiate the coolant, judging whether the temperature of the power module is smaller than the lower limit value of a preset temperature range; the control unit is further configured to: and if the temperature value of the power module is smaller than the lower limit value of the preset temperature range, controlling the opening degree of a refrigerant inlet valve of the radiator to be gradually reduced until the temperature value of the power module is within the preset temperature range.
Optionally, the control unit is further configured to: and if the temperature value of the power module is still not within the preset temperature range when the opening of the refrigerant inlet valve is controlled to be reduced to the minimum, closing the refrigerant inlet valve, and controlling the water pump and the chilled water valve to be opened.
Optionally, the control unit is further configured to: and after the water pump and the chilled water valve are controlled to be opened, controlling the frequency of the water pump according to the temperature value of the power module until the temperature of the power module is within a preset temperature range.
Optionally, the control unit is further configured to: and if the judging unit judges that the radiator can normally radiate the refrigerant, controlling the water pump to evacuate the chilled water in the chilled water loop of the radiator.
A further aspect of the invention provides a storage medium having stored thereon a computer program which, when executed by a processor, carries out the steps of any of the methods described above.
In another aspect, the present invention provides an air conditioner, including any one of the inverter power module radiators described above, further including a processor, a memory, and a computer program stored in the memory and operable on the processor, where the processor implements the steps of any one of the methods described above when executing the program.
The invention further provides an air conditioner, which comprises the frequency converter power module radiator and a heat dissipation control device comprising the frequency converter power module radiator.
According to the technical scheme of the invention, the chilled water loop is added to the radiator, so that the auxiliary heat dissipation of chilled water is realized, and the heat dissipation effect is improved; different working conditions are judged through temperature sampling, so that corresponding adjustment is made, the problem of heat dissipation of the power module is solved, the module is guaranteed to run at a set temperature, the energy efficiency is utilized to the maximum, the service life of devices is prolonged, and the reliability of the unit is improved.
Under different operating modes, through carrying out temperature measurement to the radiator, make radiator temperature control in the settlement within range, if the radiator temperature is too high or low excessively, then preferentially give the radiator heat dissipation through the refrigerant, if when the refrigerant can't continue to adjust, then adjust through supplementary heat dissipation, make the unit can adapt to the heat dissipation under the various operating modes.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic method diagram of an embodiment of a method for controlling heat dissipation of a power module of a frequency converter according to the present invention;
FIG. 2 illustrates a related art radiator control logic;
FIG. 3 is a schematic structural diagram of a radiator of an air conditioner inverter power module;
FIG. 4 is a schematic diagram of a control relationship according to an embodiment of the invention;
FIG. 5 is a method diagram of another embodiment of a method for controlling a heat sink of a frequency converter power module according to the present invention;
FIG. 6 is a method diagram of another embodiment of a method for controlling a heat sink of a frequency converter power module according to the present invention;
fig. 7 is a schematic method diagram of an embodiment of a method for controlling heat dissipation of a power module of a frequency converter according to the present invention;
fig. 8 is a schematic structural diagram of an embodiment of a heat dissipation control device of a frequency converter power module provided in the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the specific embodiments of the present invention and the accompanying drawings. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
When the unit is not started, the condensing pressure and the evaporating pressure are equal, when the unit is started, the evaporator belongs to a low-temperature end, the pressure is gradually reduced, the condensing end belongs to a high-pressure end, the heat dissipation of the device at the position flows from a high-pressure refrigerant to a low-pressure refrigerant, so that the heat dissipation effect is achieved, the refrigerant can flow through the device only by overcoming the gravity due to the fact that the condenser passes through the device and then flows to the evaporator, if the pressure difference is not large enough, the gravity can not be overcome to do work, and therefore the heat of the device cannot be taken away.
Fig. 2 shows a related art radiator control logic. As shown in fig. 2, in the related art, the heat dissipation method of the heat sink is single refrigerant heat dissipation, the refrigerant flow is related to the refrigerant pressure and the valve opening, after the heat sink is turned on, the refrigerant flow is controlled by adjusting the valve opening during the operation process, so as to adjust the temperature of the heat sink, and by sampling the temperature of the heat sink, when the temperature of the power module is too low and the valve opening for controlling the refrigerant flow cannot be adjusted (reaches the minimum value of the opening), condensed water is easily formed on the heat sink, so that a short circuit of a device occurs, and this situation mostly occurs when the module has a low heat productivity and the refrigerant pressure is high (high pressure difference, low load).
Aiming at the problem of condensed water, the means adopted in the related technology is to wrap the heat-insulating sponge, so that the contact between the radiator and the air is reduced, and the condensed water is reduced. When the temperature is too high, when refrigerant valve aperture has been unable to adjust (aperture maximum), power module temperature will rise, if shut down or reduce unit power for the protection module, then influence user experience and feel, if continue to operate, then cause the short circuit easily, the condition of component ageing inefficacy, this condition appears the module calorific capacity more, the lower condition of refrigerant pressure (low-pressure difference, high load), because of having the reason of heat preservation sponge parcel equally, the radiator surface can't release the heat to the air, thereby can lead the machine spare overtemperature to lead to the circumstances that the group shut down or influence the device life-span.
The invention provides a radiator of a power module of an air conditioner frequency converter. A refrigerant loop is arranged on a radiator of the frequency converter power module; the refrigerant flows into a refrigerant inlet of a refrigerant loop of the radiator from a condenser of the air conditioner and flows out of a refrigerant outlet to return to the evaporator; refrigerant valves, such as electromagnetic valves, are connected to the refrigerant inlet and/or the refrigerant outlet of the refrigerant circuit, such as a refrigerant inlet valve and a refrigerant outlet valve, which are respectively a refrigerant inlet valve and a refrigerant outlet valve, and the refrigerant flow can be controlled by controlling the opening of the refrigerant valves; a chilled water loop is also arranged on the radiator of the frequency converter power module; the chilled water flows into a chilled water inlet of a chilled water loop of the radiator from an evaporator of the air conditioner and flows back to the condenser from a chilled water outlet; the chilled water inlet and/or the chilled water outlet of the chilled water loop are/is connected with chilled water valves (such as electromagnetic valves), for example, the chilled water inlet and the chilled water outlet are respectively connected with one chilled water valve, and chilled water circulation can be realized by controlling the opening of the chilled water valves. The water pump is arranged between the chilled water outlet and the chilled water valve, and the effect of emptying chilled water can be realized by controlling the frequency of the water pump. The chilled water valve and/or the refrigerant valve may be specifically solenoid valves.
Fig. 3 is a schematic structural diagram of a radiator of an air conditioner inverter power module. Fig. 4 is a schematic diagram of a control relationship according to an embodiment of the present invention. As shown in fig. 3, the inner two are a refrigerant inlet and a refrigerant outlet, and the outer two are a chilled water inlet and a chilled water outlet. A refrigerant valve (e.g., a solenoid valve) is connected to the refrigerant inlet and/or the refrigerant outlet. As shown in fig. 4, the opening of the refrigerant valve is controlled by the motherboard to control the refrigerant flow, a chilled water valve (for example, an electromagnetic valve) may be connected to the chilled water inlet and/or the chilled water outlet, and the opening of the chilled water valve is controlled by the motherboard to realize chilled water circulation, thereby performing water-cooling heat dissipation. A water pump is connected between the chilled water outlet and the chilled water valve, and the frequency of the water pump is controlled by the main board, so that the effect of emptying chilled water is realized.
The invention also provides a heat dissipation control method of the frequency converter power module. The frequency converter power module comprises the frequency converter power module radiator.
Fig. 1 is a schematic method diagram of an embodiment of a method for controlling heat dissipation of a power module of a frequency converter according to the present invention.
As shown in fig. 1, according to an embodiment of the present invention, the control method includes at least step S110 and step S130.
Step S110, when the device (for example, an air conditioner) where the frequency converter is located operates, whether the heat sink can perform heat dissipation of the refrigerant normally is determined according to the temperature value of the power module.
In a specific embodiment, whether a difference value between the temperature value of the power module and a preset protection value exceeds a preset threshold value is judged, and if the difference value between the temperature value of the power module and the preset protection value does not exceed the preset threshold value, it is determined that the radiator can normally perform refrigerant heat radiation; and if the difference value between the temperature value of the power module and the preset protection value is judged not to exceed a preset threshold value, determining that the radiator can not normally carry out refrigerant heat dissipation. The radiator is in a low-pressure difference and high-load state when the refrigerant can not normally radiate heat. If the temperature of the power module is higher when the unit operates, the refrigerant valve is preferentially adjusted, and when the opening degree of the refrigerant valve is maximum, the temperature of the power module is still continuously increased, and the freezing valve and the water pump are started.
The preset threshold includes positive and negative temperature values with the same absolute value (i.e. opposite numbers), for example, ± 4 ℃; when the difference value between the temperature value of the power module and the preset protection value is a negative value, the preset threshold value is a negative value, and when the difference value between the temperature value of the power module and the preset protection value is a positive value, the preset threshold value is a positive value. For example, if the module temperature — preset protection value is equal to the difference, it is determined whether the difference is within the protection threshold range (for example, ± 4 ℃), and if not, it is determined that the difference is abnormal, and if the positive number exceeds +4 ℃, it is determined that the power module is overheated (insufficient heat dissipation), and if the negative number is less than-4 ℃, it is determined that the power module is overcooled (overcooled heat dissipation), for example: the module temperature X ℃ is set to be 36 ℃, the difference value is regarded as a normal range within +/-4 ℃, if the module temperature exceeds 40 ℃, the module temperature is too high, if the module temperature is lower than 32 ℃, the module temperature is too low, and if the module temperature is within 32-40 ℃, the module temperature is normal, and the preset protection value and the difference value range can be modified according to actual requirements.
Step S130, if the radiator cannot perform refrigerant heat dissipation normally, the water pump and the chilled water valve are controlled to be opened so as to perform auxiliary heat dissipation through chilled water circulation.
Specifically, if the radiator cannot normally perform refrigerant heat dissipation, the water pump and the chilled water valve are controlled to be opened to perform chilled water circulation, so that auxiliary heat dissipation is performed. And after the water pump and the chilled water valve are controlled to be opened, controlling the frequency of the water pump according to the temperature value until the temperature of the radiator is within a preset temperature range. For example, the temperature is adjusted from high to low when the temperature is higher than the set value to some extent, and from low to high when the temperature is higher than the set value a little.
The flow rate of the water pump (the frequency of the water pump) is adjusted from high to low or from low to high until the radiator stably operates within the set range, and the heat preservation sponge is not used because the temperature of the radiator operates within the set range.
Fig. 5 is a schematic method diagram of another embodiment of the method for controlling the radiator of the inverter power module provided by the invention.
As shown in fig. 5, according to another embodiment of the present invention, the control method further includes step S120.
And step S120, controlling the opening of a refrigerant valve of the radiator to be gradually increased, and judging whether the temperature value of the power module is still increased.
Specifically, under the condition that the radiator cannot normally radiate the refrigerant, whether the temperature of the power module is greater than the upper limit value of a preset temperature range is judged; if the temperature of the power module is judged to be larger than the upper limit value of the preset temperature range, before the water pump and the chilled water valve are controlled to be opened, the opening degree of a refrigerant valve of the radiator is controlled to be gradually increased (if a refrigerant inlet valve and a refrigerant outlet valve are arranged at the same time, the refrigerant inlet valve and the refrigerant outlet valve are simultaneously increased), and whether the temperature value of the power module is still increased is judged. And if the temperature value of the power module is still increased when the opening degree of the refrigerant valve is controlled to be increased to the maximum, controlling the water pump and the chilled water valve to be opened. The preset temperature range includes a temperature range formed by positive and negative temperature values of the preset threshold (the preset threshold includes two opposite temperature values, that is, the preset threshold includes positive and negative absolute values of the same value), for example, the protection value is set to 36 ℃, the difference value is regarded as being within a normal range of ± 4 ℃, the preset temperature range is 32-40 ℃, if the module temperature exceeds 40 ℃, the temperature is too high, and if the module temperature is lower than 32 ℃, the temperature is too low.
Fig. 6 is a method schematic diagram of a control method of a radiator of a frequency converter power module according to another embodiment of the invention.
As shown in fig. 6, according to still another embodiment of the present invention, the control method further includes step S140 and step S150.
Step S140, determining whether the temperature value of the power module is less than a lower limit value of a preset temperature range under the condition that the heat sink cannot perform refrigerant heat dissipation normally.
Step S150, if the temperature value of the power module is smaller than the lower limit value of the preset temperature range, controlling the opening degree of the refrigerant inlet valve of the heat sink to gradually decrease until the temperature value of the power module is within the preset temperature range.
Specifically, under the condition that the radiator cannot normally perform coolant heat dissipation, if the temperature value of the power module is smaller than the lower limit value of the preset temperature range, the opening degree of a coolant inlet valve of the radiator is controlled to be gradually reduced until the temperature value of the power module is within the preset temperature range. The preset temperature range includes a temperature range formed by positive and negative temperature values of the preset threshold (the preset threshold includes two opposite temperature values, that is, the preset threshold includes positive and negative absolute values of the same value), for example, the protection value is set to 36 ℃, the difference value is regarded as being within a normal range of ± 4 ℃, the preset temperature range is 32-40 ℃, if the module temperature exceeds 40 ℃, the temperature is too high, and if the module temperature is lower than 32 ℃, the temperature is too low.
Further, if the opening degree of the refrigerant inlet valve is controlled to be reduced (if the refrigerant inlet valve and the refrigerant outlet valve are provided, the refrigerant inlet valve and the refrigerant outlet valve are simultaneously reduced) to the minimum, the temperature value of the power module is still not within the preset temperature range, the refrigerant inlet valve and/or the refrigerant outlet valve is closed, and the water pump and the chilled water valve are controlled to be opened. And after the water pump and the chilled water valve are controlled to be opened, controlling the frequency of the water pump according to the temperature value until the temperature of the radiator is within a preset temperature range.
Specifically, when the unit is running, if the temperature of the radiator is relatively low, the water pump and the freezing water valve are gradually opened, and the refrigerant valve is gradually closed until the temperature of the radiator is within the preset temperature range, and if the opening degree of the refrigerant valve is minimum, the running temperature is still relatively low, the refrigerant valve is closed, and meanwhile, the freezing valve is opened and the frequency of the water pump is gradually increased, so that the flow rate of the freezing water is increased until the temperature of the radiator is in steady-state running within the preset temperature range.
Under the condition that the radiator can normally radiate the refrigerant, the radiator can control the radiation by controlling the opening of the refrigerant valve, and the flow of the refrigerant can be controlled by controlling the opening of the refrigerant valve, so that the radiator can control the power module to radiate by controlling the opening of the refrigerant valve. Preferably, if the radiator is judged to be capable of normally radiating the refrigerant, the water pump is controlled to evacuate the chilled water in the chilled water loop of the radiator. Because water can transmit temperature, under the condition of not pasting the heat preservation sponge, if not evacuation refrigerated water, then the supercooled condition can appear, forms a large amount of condensation water, and the power module is the forceful electric power device, and condensation water can lead to the module short circuit, explodes even.
In order to clearly illustrate the technical solution of the present invention, an execution flow of the heat dissipation control method of the frequency converter power module provided by the present invention is described below with a specific embodiment.
Fig. 7 is a schematic method diagram of a heat dissipation control method of a frequency converter power module according to an embodiment of the present invention.
As shown in fig. 7, when the unit is running, if the refrigerant can dissipate heat normally (for example, the temperature of the power module is detected by a temperature sensing device disposed on the power module, if the temperature of the power module is within a set range, it is determined that heat dissipation can be performed normally, and if the temperature of the power module is not within the set range, it is determined that heat dissipation is abnormal), the water pump evacuates the frozen water in the heat sink, and the flow of the refrigerant is controlled by the opening of the refrigerant valve to dissipate heat by the power module; when the unit is running, if the temperature value of the power module is not within the set range (for example, 32-40 ℃), the water pump and the chilled water valve are controlled to be opened, the refrigerant valve is gradually reduced until the temperature is within the set range (for example, 32-40 ℃), and if the opening of the refrigerant valve is reduced to the minimum, the temperature of the power module is still low, the refrigerant valve is closed, and meanwhile, the chilled valve is opened, the frequency of the water pump is gradually increased, and therefore the chilled water flow is increased until the radiator runs in a steady state within the set range. If the temperature of the power module is higher when the unit operates, the refrigerant valve is preferentially adjusted, when the opening degree of the refrigerant valve is maximum, the operating temperature is still continuously increased, the freezing valve and the water pump are opened, the flow rate of the water pump (namely the power of the water pump) is adjusted from high to low or from low to high through the mainboard, until the radiator stably operates in the set range, and the heat preservation sponge is not used because the temperature of the radiator operates in the set range.
The invention also provides a heat dissipation control device of the frequency converter power module. The frequency converter power module comprises the frequency converter power module radiator of any one of the previous embodiments.
Fig. 8 is a schematic structural diagram of an embodiment of a heat dissipation control device of a frequency converter power module provided in the present invention. As shown in fig. 8, the heat dissipation control device 100 of the frequency converter power module includes a determination unit 110 and a control unit 120.
The determining unit 110 is configured to determine whether the heat sink can perform heat dissipation of a refrigerant normally according to a temperature value of the power module when a device (e.g., an air conditioner) where the frequency converter is located operates.
In a specific embodiment, whether a difference value between the temperature value of the power module and a preset protection value exceeds a preset threshold value is judged, and if the difference value between the temperature value of the power module and the preset protection value does not exceed the preset threshold value, it is determined that the radiator can normally perform refrigerant heat radiation; and if the difference value between the temperature value of the power module and the preset protection value is judged not to exceed a preset threshold value, determining that the radiator can not normally carry out refrigerant heat dissipation. The radiator is in a low-pressure difference and high-load state when the refrigerant can not normally radiate heat. If the temperature of the radiator is higher when the unit operates, the refrigerant valve is preferentially adjusted, and when the opening degree of the refrigerant valve is maximum, the operating temperature is still continuously increased, and the freezing valve and the water pump are opened.
The preset threshold includes positive and negative temperature values with the same absolute value (i.e. opposite numbers), for example, ± 4 ℃; when the difference value between the temperature value of the power module and the preset protection value is a negative value, the preset threshold value is a negative value, and when the difference value between the temperature value of the power module and the preset protection value is a positive value, the preset threshold value is a positive value. For example, if the module temperature — preset protection value is equal to the difference, it is determined whether the difference is within the protection threshold range (for example, ± 4 ℃), and if not, it is determined that the difference is abnormal, and if the positive number exceeds +4 ℃, it is determined that the power module is overheated (insufficient heat dissipation), and if the negative number is less than-4 ℃, it is determined that the power module is overcooled (overcooled heat dissipation), for example: the module temperature X ℃ is set to be 36 ℃, the difference value is regarded as a normal range within +/-4 ℃, if the module temperature exceeds 40 ℃, the module temperature is too high, if the module temperature is lower than 32 ℃, the module temperature is too low, and if the module temperature is within 32-40 ℃, the module temperature is normal, and the preset protection value and the difference value range can be modified according to actual requirements.
The control unit 120 is configured to control the water pump and the chilled water valve to be opened to perform auxiliary heat dissipation through chilled water circulation if the determination unit 110 determines that the heat sink cannot perform refrigerant heat dissipation normally.
Specifically, if the radiator cannot normally perform refrigerant heat dissipation, the water pump and the chilled water valve are controlled to be opened to perform chilled water circulation, so that auxiliary heat dissipation is performed. And after the water pump and the chilled water valve are controlled to be opened, controlling the frequency of the water pump according to the temperature value until the temperature of the radiator is within a preset temperature range. For example, the temperature is adjusted from high to low when the temperature is higher than the set value to some extent, and from low to high when the temperature is higher than the set value a little.
The flow rate of the water pump (the frequency of the water pump) is adjusted from high to low or from low to high until the radiator stably operates within the set range, and the heat preservation sponge is not used because the temperature of the radiator operates within the set range.
According to a preferred embodiment of the present invention, the control unit 120 is further configured to: before the judging unit 110 judges that the radiator can not normally perform coolant heat dissipation and controls the water pump and the chilled water valve to be opened, the opening degree of a coolant valve of the radiator is controlled to be gradually increased; the judging unit is further configured to: judging whether the temperature value of the power module is still increased;
the control unit 120 is further configured to: and if the temperature value of the power module is still increased when the opening degree of the refrigerant valve is controlled to be increased to the maximum, controlling the water pump and the chilled water valve to be opened.
Specifically, the determining unit 110 determines whether the temperature of the power module is greater than an upper limit value of a preset temperature range when determining that the heat sink cannot perform refrigerant heat dissipation normally; if the temperature of the power module is greater than the upper limit value of the preset temperature range, the control unit 120 controls the opening of the refrigerant valve of the radiator to be gradually increased (if the water pump and the chilled water valve are provided with the refrigerant inlet valve and the refrigerant outlet valve at the same time, the refrigerant inlet valve and the refrigerant outlet valve are simultaneously increased) before controlling the water pump and the chilled water valve to be opened, and determines whether the temperature value of the power module is still increased. And if the temperature value of the power module is still increased when the opening degree of the refrigerant valve is controlled to be increased to the maximum, controlling the water pump and the chilled water valve to be opened. The preset temperature range includes a temperature range formed by positive and negative temperature values of the preset threshold (the preset threshold includes two opposite temperature values, that is, the preset threshold includes positive and negative absolute values of the same value), for example, the protection value is set to 36 ℃, the difference value is regarded as being within a normal range of ± 4 ℃, the preset temperature range is 32-40 ℃, if the module temperature exceeds 40 ℃, the temperature is too high, and if the module temperature is lower than 32 ℃, the temperature is too low.
Further, the determining unit 110 is further configured to: under the condition that the radiator cannot normally radiate the coolant, judging whether the temperature of the power module is smaller than the lower limit value of a preset temperature range; the control unit 120 is further configured to control the opening of the refrigerant inlet valve of the radiator to gradually decrease until the temperature value of the power module is within the preset temperature range, if the temperature value of the power module is smaller than the lower limit value of the preset temperature range.
Specifically, under the condition that it is determined that the heat sink cannot perform heat dissipation of the refrigerant normally, the determining unit 110 determines whether the temperature value of the power module is smaller than a lower limit value of the preset temperature range, and if the temperature value of the power module is smaller than the lower limit value of the preset temperature range, the control unit controls the opening degree of the refrigerant inlet valve of the heat sink to be gradually reduced until the temperature value of the power module is within the preset temperature range.
Further, the control unit 120 is further configured to: and if the opening degree of the refrigerant inlet valve is controlled to be reduced (if the refrigerant inlet valve and the refrigerant outlet valve are arranged at the same time, the refrigerant inlet valve and the refrigerant outlet valve are simultaneously reduced) to the minimum, the temperature value of the power module is still not within the preset temperature range, the refrigerant inlet valve and/or the refrigerant outlet valve are closed, and the water pump and the chilled water valve are controlled to be opened. And after the water pump and the chilled water valve are controlled to be opened, controlling the frequency of the water pump according to the temperature value until the temperature of the radiator is within a preset temperature range.
Specifically, when the unit is running, if the temperature of the radiator is relatively low, the water pump and the freezing water valve are gradually opened, and the refrigerant valve is gradually closed until the temperature of the radiator is within the preset temperature range, and if the opening degree of the refrigerant valve is minimum, the running temperature is still relatively low, the refrigerant valve is closed, and meanwhile, the freezing valve is opened and the frequency of the water pump is gradually increased, so that the flow rate of the freezing water is increased until the temperature of the radiator is in steady-state running within the preset temperature range.
Under the condition that the radiator can normally perform refrigerant heat dissipation, the control unit 120 controls heat dissipation by controlling the opening of the refrigerant valve, and the flow of the refrigerant can be controlled by controlling the opening of the refrigerant valve, so that heat dissipation can be performed by controlling the power module by controlling the opening of the refrigerant valve. Preferably, the control unit 120 is further configured to: if the determining unit 110 determines that the heat sink can perform heat dissipation of the refrigerant normally, the water pump is controlled to evacuate chilled water in the chilled water loop of the heat sink. Because water can transmit temperature, under the condition of not pasting the heat preservation sponge, if not evacuation refrigerated water, then the supercooled condition can appear, forms a large amount of condensation water, and the power module is the forceful electric power device, and condensation water can lead to the module short circuit, explodes even.
The invention also provides a storage medium corresponding to the heat dissipation control method of the frequency converter power module, and a computer program is stored on the storage medium, and when the computer program is executed by a processor, the computer program realizes the steps of any one of the methods.
The invention also provides an air conditioner corresponding to the heat dissipation control method of the frequency converter power module, which comprises the frequency converter power module radiator in any one of the embodiments, a processor, a memory and a computer program which is stored in the memory and can run on the processor, wherein the processor realizes the steps of any one of the methods when executing the program.
The invention also provides an air conditioner corresponding to the heat dissipation control device of the frequency converter power module, which comprises the frequency converter power module radiator in any embodiment and further comprises the heat dissipation control device of any frequency converter power module.
According to the scheme provided by the invention, the chilled water loop is added to the radiator, so that the auxiliary heat dissipation of chilled water is realized, and the heat dissipation effect is improved; different working conditions are judged through temperature sampling, so that corresponding adjustment is made, the problem of heat dissipation of the power module is solved, the module is guaranteed to run at a set temperature, the energy efficiency is utilized to the maximum, the service life of devices is prolonged, and the reliability of the unit is improved.
Under different operating modes, through carrying out temperature measurement to the radiator, make radiator temperature control in the settlement within range, if the radiator temperature is too high or low excessively, then preferentially give the radiator heat dissipation through the refrigerant, if when the refrigerant can't continue to adjust, then adjust through supplementary heat dissipation, make the unit can adapt to the heat dissipation under the various operating modes.
The functions described herein may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Other examples and implementations are within the scope and spirit of the invention and the following claims. For example, due to the nature of software, the functions described above may be implemented using software executed by a processor, hardware, firmware, hardwired, or a combination of any of these. In addition, each functional unit may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.
In the embodiments provided in the present application, it should be understood that the disclosed technology can be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units may be a logical division, and in actual implementation, there may be another division, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, units or modules, and may be in an electrical or other form.
The units described as separate parts may or may not be physically separate, and the parts serving as the control device may or may not be physical units, may be located in one place, or may be distributed on a plurality of units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic or optical disk, and other various media capable of storing program codes.
The above description is only an example of the present invention, and is not intended to limit the present invention, and it is obvious to those skilled in the art that various modifications and variations can be made in the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.
Claims (15)
1. A frequency converter power module heat sink, comprising:
a chilled water loop is arranged on a radiator of the frequency converter power module; chilled water inlet department and/or chilled water outlet department in chilled water return circuit are connected with the chilled water valve the chilled water outlet with be equipped with the water pump between the chilled water valve that chilled water outlet department connects, through control the chilled water valve with the water pump can realize the chilled water circulation.
2. A heat dissipation control method of a converter power module including the converter power module heat sink of claim 1, the heat dissipation control method comprising:
when the equipment where the frequency converter is located runs, judging whether the radiator can normally carry out refrigerant heat dissipation according to the temperature value of the power module;
and if the radiator cannot normally carry out refrigerant heat dissipation, controlling the water pump and the chilled water valve to be opened so as to carry out auxiliary heat dissipation through chilled water circulation.
3. The heat dissipation control method of claim 2, before determining that the heat sink cannot perform heat dissipation normally in a refrigerant and controlling the water pump and the chilled water valve to open, further comprising:
controlling the opening degree of a refrigerant valve of the radiator to be gradually increased, and judging whether the temperature value of the power module is still increased;
and if the temperature value of the power module is still increased when the opening degree of the refrigerant valve is controlled to be increased to the maximum, controlling the water pump and the chilled water valve to be opened.
4. The heat dissipation control method according to claim 2 or 3, further comprising:
under the condition that the radiator cannot normally radiate the coolant, judging whether the temperature of the power module is smaller than the lower limit value of a preset temperature range;
and if the temperature value of the power module is smaller than the lower limit value of the preset temperature range, controlling the opening degree of a refrigerant inlet valve of the radiator to be gradually reduced until the temperature value of the power module is within the preset temperature range.
5. The heat dissipation control method according to claim 4, further comprising:
and if the temperature value of the power module is still not within the preset temperature range when the opening of the refrigerant inlet valve is controlled to be reduced to the minimum, closing the refrigerant inlet valve, and controlling the water pump and the chilled water valve to be opened.
6. The heat dissipation control method according to any one of claims 2 to 5, further comprising:
and after the water pump and the chilled water valve are controlled to be opened, controlling the frequency of the water pump according to the temperature value of the power module until the temperature of the power module is within a preset temperature range.
7. The heat dissipation control method according to any one of claims 2 to 6, further comprising:
and if the radiator can normally radiate the refrigerant, controlling the water pump to evacuate the chilled water in the chilled water loop of the radiator.
8. A heat dissipation control device of a converter power module, the converter power module comprising the converter power module heat sink of claim 1, the heat dissipation control device comprising:
the judging unit is used for judging whether the radiator can normally radiate the refrigerant according to the temperature value of the power module when the equipment where the frequency converter is located runs;
and the control unit is used for controlling the water pump and the chilled water valve to be opened if the judgment unit judges that the radiator can not normally carry out refrigerant heat dissipation so as to carry out auxiliary heat dissipation through chilled water circulation.
9. The heat dissipation control device of claim 8,
the control unit is further configured to: before the judging unit judges that the radiator can not normally carry out refrigerant heat dissipation and controls the water pump and the chilled water valve to be opened, the opening degree of a refrigerant valve of the radiator is controlled to be gradually increased;
the judging unit is further configured to: judging whether the temperature value of the power module is still increased;
the control unit is further configured to: and if the temperature value of the power module is still increased when the opening degree of the refrigerant valve is controlled to be increased to the maximum, controlling the water pump and the chilled water valve to be opened.
10. The heat dissipation control device according to claim 8 or 9,
the judging unit is further configured to: under the condition that the radiator cannot normally radiate the coolant, judging whether the temperature of the power module is smaller than the lower limit value of a preset temperature range;
the control unit is further configured to: and if the temperature value of the power module is smaller than the lower limit value of the preset temperature range, controlling the opening degree of a refrigerant inlet valve of the radiator to be gradually reduced until the temperature value of the power module is within the preset temperature range.
11. The heat dissipation control device of claim 10, wherein the control unit is further configured to:
and if the temperature value of the power module is still not within the preset temperature range when the opening of the refrigerant inlet valve is controlled to be reduced to the minimum, closing the refrigerant inlet valve, and controlling the water pump and the chilled water valve to be opened.
12. The heat dissipation control device of any of claims 8-11, wherein the control unit is further configured to:
and after the water pump and the chilled water valve are controlled to be opened, controlling the frequency of the water pump according to the temperature value of the power module until the temperature of the power module is within a preset temperature range.
13. The heat dissipation control device according to any one of claims 8 to 12,
the control unit is further configured to: and if the judging unit judges that the radiator can normally radiate the refrigerant, controlling the water pump to evacuate the chilled water in the chilled water loop of the radiator.
14. A storage medium, having stored thereon a computer program which, when being executed by a processor, carries out the steps of the method of any one of claims 2 to 7.
15. An air conditioner comprising the inverter power module heat sink of claim 1, further comprising a processor, a memory, and a computer program stored on the memory and executable on the processor, the processor implementing the steps of the method of any one of claims 2 to 7 when executing the program, or a heat dissipation control device comprising the inverter power module of any one of claims 8 to 13.
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