CN112584678A - Phase change heat dissipation device for inverter and inverter - Google Patents
Phase change heat dissipation device for inverter and inverter Download PDFInfo
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- CN112584678A CN112584678A CN202011435491.4A CN202011435491A CN112584678A CN 112584678 A CN112584678 A CN 112584678A CN 202011435491 A CN202011435491 A CN 202011435491A CN 112584678 A CN112584678 A CN 112584678A
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- evaporator
- condenser
- phase change
- inverter
- heat source
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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
- H05K7/2089—Modifications to facilitate cooling, ventilating, or heating for power electronics, e.g. for inverters for controlling motor
- H05K7/20936—Liquid coolant with phase change
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/003—Constructional details, e.g. physical layout, assembly, wiring or busbar connections
Abstract
The invention is suitable for the technical field of inverter heat dissipation, and provides a phase change heat dissipation device for an inverter, which comprises an evaporator, a phase change heat dissipation device and a phase change heat dissipation device, wherein the evaporator is used for taking away the heat of a power device of the inverter; the condenser is communicated with the evaporator, the phase change medium in the evaporator flows to the condenser after being evaporated, and the phase change medium in the condenser flows back to the evaporator after being condensed; the inner cavity of the evaporator comprises evaporation cavities with different thicknesses, and the thickness of the evaporation cavity corresponding to the strong heat source area of the inverter is larger than that of the evaporation cavity corresponding to the weak heat source area, so that the inner cavity of the evaporator corresponding to the strong heat source area is filled with more phase change media, and the cooling of the strong heat source area is facilitated. The heat dissipation device forms a larger phase change medium storage area in the strong heat source area, so that the boiling area is widened, the vaporization can be carried out quickly and rapidly, the temperature of the strong heat source area is effectively reduced, and the utilization rate of an evaporator and a power device is improved; the problem of the radiating effect that local temperature rise of two-phase flow cooling system leads to is too high poor is solved to the cost is reduced.
Description
Technical Field
The invention belongs to the technical field of heat dissipation of photovoltaic inverters, and particularly relates to a phase change heat dissipation device for an inverter and the inverter.
Background
The photovoltaic inverter has very severe operating environment, and severe factors such as high temperature, high humidity, salt fog, sand dust and the like frequently and simultaneously appear, so the high protection level design of the inverter is particularly important. In an inverter with a high protection level, it is a continuous research on how to satisfy the requirement of independent air ducts and the requirement of providing the heat dissipation capability of the IGBT as much as possible.
With the continuous increase of the power density of the photovoltaic inverter, the traditional scheme can not meet the temperature rise requirement of the current IGBT by adopting a mode of combining an aluminum plate and a fan; the problem that the local temperature rise of the IGBT of the current inverter is too high is difficult to solve by a emerging two-phase flow heat dissipation technology. Therefore this patent provides a novel two-phase flow heat dissipation technique, has not only solved the too high problem of IGBT local temperature rise, has improved IGBT's heat-sinking capability and IGBT's utilization ratio moreover, has reduced IGBT use cost.
The condenser and the evaporator in the traditional two-phase flow adopt a horizontal layout, the thickness of an evaporation cavity in the evaporator is uniform, but the IGBT is used as a heating device in the inverter, and the heating point is not uniform. Therefore, the conventional phase-change heat dissipation device with two-phase flow cannot solve the heat dissipation problem when the heat source is concentrated, and has poor heat dissipation effect and low utilization rate of the evaporator.
Disclosure of Invention
The embodiment of the invention provides a phase change heat dissipation device for an inverter, and aims to solve the problems of high local temperature rise and poor heat dissipation effect of the inverter and low utilization rate of an evaporator.
The embodiment of the present invention is achieved as described above, and the present invention provides a phase change heat dissipating apparatus for an inverter, including: the evaporator is used for carrying away heat generated by the inverter power device; the condenser is communicated with the evaporator, the phase change medium in the evaporator flows to the condenser after being evaporated, and the phase change medium in the condenser flows back to the evaporator after being condensed; the inner cavity of the evaporator comprises evaporation cavities with different thicknesses, and the thickness of the evaporation cavity corresponding to the strong heat source area of the inverter is larger than that of the evaporation cavity corresponding to the weak heat source area.
Still further, the evaporator includes: a plurality of with the evaporating pipe that the evaporation chamber is connected, the evaporating pipe with the condenser is connected, the condenser through the condenser pipe with the evaporation chamber is connected.
Furthermore, the condenser and the evaporator are arranged up and down, and the condenser is positioned above the evaporator.
Furthermore, an air cooling device is arranged on one side, located on the condenser, of the top of the phase change heat dissipation device, and the angle between the condenser and the evaporator is adjusted by the condenser according to the wind direction of the air cooling device.
Further, the phase change medium is a liquid having a high boiling point and a low condensation point.
The embodiment of the invention also provides an inverter which comprises the phase change heat dissipation device.
Furthermore, a power device and a magnetic device are arranged on the surface of the evaporation cavity, the power single tube is an IGBT power single tube or a power diode, and the magnetic device is an inductor.
Furthermore, heat-conducting silicone grease is coated between the evaporation cavity and the power device and between the magnetic device and the evaporation cavity.
Still further, the inverter includes a front compartment and a rear compartment, and the evaporator separates the front compartment and the rear compartment.
The evaporation cavities of the phase-change heat dissipation device are arranged according to the distribution condition of the heat sources of the inverter, and the thickness of the evaporation cavity corresponding to the strong heat source area is larger than that of the evaporation cavity corresponding to the weak heat source area. The strong heat source area is high in temperature, so that more phase change media are filled in the strong heat source area to maintain heat exchange, and a thicker evaporation cavity is needed; and the weak heat source area does not need more phase change media to maintain heat exchange because of low temperature rise of the weak heat source area, so that the evaporation cavity is thinner. The phase-change heat dissipation device forms a larger phase-change medium storage area in the area of the strong heat source, so that the boiling area is widened, the vaporization can be carried out quickly and rapidly, the temperature of the strong heat source area is effectively reduced, and the utilization rate of an evaporator and a power device is improved; the problem of the radiating effect that local temperature rise of two-phase flow cooling system leads to is too high poor is solved to the cost is reduced.
Drawings
Fig. 1 is a perspective view of a phase change heat dissipation device according to an embodiment of the present invention;
FIG. 2 is a rear view of a phase change heat sink provided by an embodiment of the present invention;
FIG. 3 is a side view of a phase change heat sink provided by an embodiment of the present invention;
FIG. 4 is a schematic diagram of a heat exchange structure of a phase change heat sink according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of an inverter according to an embodiment of the present invention.
The reference numbers illustrate:
10. a condenser; 11. a condenser tube; 20. an evaporator; 21. an evaporation tube; 22. an evaporation chamber; 220. a weak heat source region; 221. a strong heat source region; 30. a power device; 31. a magnetic device.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The invention provides a phase-change heat dissipation device for an inverter and the inverter. The strong heat source area is high in temperature, so that more phase change media are filled in the strong heat source area to maintain heat exchange, and a thicker evaporation cavity is needed; and the weak heat source area does not need more phase change media to maintain heat exchange because of low temperature rise of the weak heat source area, so that the evaporation cavity is thinner. The evaporator of the phase-change heat dissipation device can form a larger phase-change medium storage area in the area of the strong heat source, so that the boiling area is widened, the evaporator can be quickly and rapidly vaporized, the temperature of the strong heat source area is effectively reduced, and the utilization rate of the evaporator and a power device is improved; the problem of the radiating effect that local temperature rise of two-phase flow cooling system leads to is too high poor is solved to the cost is reduced.
Example one
Referring to fig. 1 and 2, the present embodiment provides a phase change heat dissipating device for an inverter, including: an evaporator 20 for taking away heat generated by the inverter power device 30; the condenser 10 is communicated with the evaporator 20, the phase change medium in the evaporator 20 flows to the condenser 10 after being evaporated, and the phase change medium in the condenser 10 flows back to the evaporator 20 after being condensed; the inner cavity of the evaporator 20 comprises evaporation cavities 22 with different thicknesses, and the thickness of the evaporation cavity 22 corresponding to the strong heat source area 221 is larger than that of the evaporation cavity 22 corresponding to the weak heat source area 220, so that the inner cavity of the evaporator 20 corresponding to the strong heat source area is filled with more phase change media, and the temperature reduction of the strong heat source area 221 is facilitated.
Further, the evaporator 20 includes a plurality of evaporation tubes 21 connected to the evaporation chamber. The evaporation pipe 21 is connected with the condenser 10, and the condenser 10 is connected with the evaporation cavity 22 through the condensation pipe 11; the thickness of the evaporation cavity 22 corresponding to the strong heat source area 221 is greater than that of the evaporation cavity 22 corresponding to the weak heat source area 220.
In this embodiment, the power device 30 is an IBGT power tube, the surface of the evaporation cavity 22 is provided with a plurality of IGBT power tubes, the topology principle of the inverter causes uneven distribution of the heat source formed by the heating of the IGBT power single tubes on the surface of the evaporator 20, the inner wall of the evaporation cavity 22 is designed according to the distribution condition of the inverter personnel, the evaporation cavity corresponding to the strong heat source area 221 is thicker, and the evaporation cavity corresponding to the weak heat source area 220 is thinner.
Specifically, referring to fig. 3, in the present embodiment, the evaporation chamber 22 corresponding to the strong heat source region 221, i.e., the heat source concentrated region, is thicker, and the evaporation chamber 22 corresponding to the weak heat source region 220, i.e., the heat source dispersed region, is thinner.
Further, the evaporation cavity 22 is filled with a repellent phase change medium, and the phase change medium is a liquid with a higher boiling point and a lower condensation point.
Referring to fig. 4, in the present embodiment, the high-frequency operation of the IGBT power tube generates heat to form a heat source, so that the phase-change medium liquid in the evaporation cavity 22 is boiled and vaporized, and is guided into the condenser 10 through the evaporation tube 21, and the condensed phase-change medium is liquefied and then flows back to the evaporation cavity 22 through the condensation tube 11, so as to circularly take away heat, thereby achieving heat dissipation of the whole inverter.
The inner cavity of the evaporator of the present embodiment includes evaporation cavities 22 with different thicknesses, and the evaporation cavities 22 are arranged according to the distribution of the inverter heat source, and the thickness of the evaporation cavity 22 corresponding to the strong heat source area 221 is greater than that of the evaporation cavity 22 corresponding to the weak heat source area 220. The intense heat source region 221 is high in temperature, so that more phase change media can fill the intense heat source region 221 to maintain heat exchange, and therefore a thicker inner cavity is needed; the weak heat source region 220 has a relatively small inner cavity thickness because it does not require a relatively large amount of phase change medium to maintain heat exchange due to its low temperature rise. The evaporator 20 of the phase-change heat dissipation device can form a larger phase-change medium storage area in the strong heat source area 221, so that the boiling area is widened, the evaporation can be carried out quickly and rapidly, the temperature of the strong heat source area is effectively reduced, and the utilization rates of the evaporator 20 and the power device 30 are improved; the problem of the radiating effect that local temperature rise of two-phase flow cooling system leads to is too high poor is solved to the cost is reduced.
Example two
Referring to fig. 3 and 4, on the basis of the first embodiment, the present embodiment provides a phase-change heat dissipation apparatus for an inverter, in which a condenser 10 and an evaporator 20 are arranged in an up-down manner, the condenser 10 is located above the evaporator 20, and a phase-change medium in an evaporation cavity 22 completes a heat cycle by means of an air pressure difference of evaporation and condensation and gravity.
In other embodiments, a driving pump is further disposed on the pipeline between the evaporator 20 and the condenser 10 to drive the phase change medium to complete the heat cycle.
EXAMPLE III
On the basis of the first embodiment, the present embodiment provides a phase-change heat dissipation device for an inverter, further, an air cooling device is disposed on a side of the condenser 10 on the top of the phase-change heat dissipation device, and the angle between the condenser 10 and the evaporator 20 is adjusted by the condenser 10 according to the wind direction of the air cooling device.
In the present embodiment, the air passage and the positional relationship of the evaporator 20 and the condenser 10 are set according to the cavity structure of the inverter. The condenser 10 and the evaporator 20 are horizontally disposed, and the condenser 10 is located above the evaporator 20. The air cooling device is a fan, and the fan is smaller than the condenser 10, so that the air channel is in a horn mouth shape, wind can be uniformly blown to the condenser 10, and the heat dissipation capacity is further improved.
In other embodiments, the condenser 10 is disposed perpendicular to the evaporator 20, the condenser 10 is disposed above the evaporator 20, and the air cooling device is disposed directly opposite to the condenser 10 and directly blows towards the condenser 10, so as to improve the heat dissipation capability. Or the air cooling device can be arranged at one side of the condenser 10 according to the space in the cavity of the inverter, and the cold air is blown to the condenser 10 after being turned by the horizontal air duct.
It is understood that in other embodiments, the optimum angles of the condenser 10 and the evaporator 20 are determined according to the wind speed and the wind direction of the fan and the fan with different principles, so that the fan blows towards the wind channel and blows towards the condenser 10 through the wind channel, and the utilization rate of the condenser 10 is improved.
Example four
Referring to fig. 5, the present embodiment further provides an inverter including the phase change heat dissipation device according to any of the above embodiments. The inverter of the present embodiment further includes a power device 30 and a magnetic device 31 provided on the surface of the evaporation chamber. Wherein, the power device 30 includes an IGBT power tube or a single tube diode, and the magnetic device 31 includes an inductor.
Further, heat-conducting silicone grease is coated between the evaporation cavity 22 and the power device 30 and between the evaporation cavity 22 and the magnetic device 31, so that heat can be rapidly transferred to the evaporation cavity.
In the present embodiment, the inverter is divided into a front compartment and a rear compartment by the evaporation chamber 22. The main fan enters air from the front cabin, continues to pass through the inductor 31 after heat exchange of the condenser 10, and finally exits air from the lower air outlet.
The inverter of the present embodiment can design the thickness of the evaporation chamber 22 according to the distribution of the heat source, and the thickness of the evaporation chamber 22 corresponding to the strong heat source region 221 is larger, and the thickness of the evaporation chamber 22 corresponding to the weak heat source region 220 is smaller. The intense heat source region 221 is high in temperature, so that more phase change media can fill the intense heat source region 221 to maintain heat exchange, and therefore a thicker inner cavity is needed; the weak heat source region 220 has a relatively small inner cavity thickness because it does not require a relatively large amount of phase change medium to maintain heat exchange due to its low temperature rise. The inverter of the invention forms a larger phase change medium storage area in the area of the strong heat source, thereby widening the boiling area, being capable of quickly and rapidly vaporizing, effectively reducing the temperature of the strong heat source area, and improving the utilization rate of the evaporator 20 and the power device 30; the problem of the radiating effect that local temperature rise of two-phase flow cooling system leads to is too high poor is solved to the cost is reduced.
The phase-change heat dissipation device is provided with the corresponding evaporation cavities according to the distribution condition of the heat source of the inverter, and the thickness of the evaporation cavity corresponding to the strong heat source area is larger than that of the evaporation cavity corresponding to the weak heat source area. The strong heat source area enables more phase change media to be filled in the strong heat source area to maintain heat exchange due to high temperature, so that a thicker inner cavity is needed; and the weak heat source area does not need more phase change media to maintain heat exchange because of low temperature rise of the weak heat source area, so that the thickness of the inner cavity is thinner. The evaporator of the phase-change heat dissipation device can form a larger phase-change medium storage area in the area of the strong heat source, so that the boiling area is widened, the evaporator can be quickly and rapidly vaporized, the temperature of the strong heat source area is effectively reduced, and the utilization rate of the evaporator and a power device is improved; the problem of the radiating effect that local temperature rise of two-phase flow cooling system leads to is too high poor is solved to the cost is reduced. The angle between the condenser and the evaporator is determined according to the wind speed, the wind direction and fans of different principles, the fan is directly opposite to the wind channel to blow the condenser, and the utilization rate of the condenser is improved. The condenser and the evaporator are arranged in parallel up and down, and the fan is arranged on the side opposite to the condenser.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (9)
1. A phase change heat sink for an inverter, comprising:
the evaporator is used for carrying away heat generated by the inverter power device;
the condenser is communicated with the evaporator, the phase change medium in the evaporator flows to the condenser after being evaporated, and the phase change medium in the condenser flows back to the evaporator after being condensed;
the inner cavity of the evaporator comprises evaporation cavities with different thicknesses, and the thickness of the evaporation cavity corresponding to the strong heat source area of the inverter is larger than that of the evaporation cavity corresponding to the weak heat source area.
2. The phase change heat sink of claim 1,
the evaporator includes: a plurality of with the evaporating pipe that the evaporation chamber is connected, the evaporating pipe with the condenser is connected, the condenser through the condenser pipe with the evaporation chamber is connected.
3. The phase change heat sink of claim 2,
the condenser and the evaporator are arranged up and down, and the condenser is positioned above the evaporator.
4. The phase change heat sink of claim 2,
the top of the phase change heat dissipation device is located on one side of the condenser, an air cooling device is arranged on one side of the condenser, and the angle between the condenser and the evaporator is adjusted by the condenser according to the wind direction of the air cooling device.
5. The phase change heat sink of claim 1,
the phase-change medium is a liquid with a high boiling point and a low condensation point.
6. An inverter, characterized by comprising the phase change heat dissipating device as recited in any one of claims 1 to 5.
7. The inverter of claim 6,
the surface of the evaporation cavity is provided with a power device and a magnetic device, the power single tube is an IGBT power single tube or a power diode, and the magnetic device is an inductor.
8. The inverter of claim 7,
and heat-conducting silicone grease is coated between the evaporation cavity and the power device and between the magnetic device and the evaporation cavity.
9. The inverter of claim 6, wherein the inverter includes a front compartment and a rear compartment, the evaporator separating the front compartment and the rear compartment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011435491.4A CN112584678A (en) | 2020-12-10 | 2020-12-10 | Phase change heat dissipation device for inverter and inverter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011435491.4A CN112584678A (en) | 2020-12-10 | 2020-12-10 | Phase change heat dissipation device for inverter and inverter |
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| Publication Number | Publication Date |
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| CN112584678A true CN112584678A (en) | 2021-03-30 |
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| CN202011435491.4A Pending CN112584678A (en) | 2020-12-10 | 2020-12-10 | Phase change heat dissipation device for inverter and inverter |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024066705A1 (en) * | 2022-09-28 | 2024-04-04 | 华为数字能源技术有限公司 | Heat dissipation system and power apparatus |
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2020
- 2020-12-10 CN CN202011435491.4A patent/CN112584678A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024066705A1 (en) * | 2022-09-28 | 2024-04-04 | 华为数字能源技术有限公司 | Heat dissipation system and power apparatus |
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