Phase change heat dissipation device for power inductor

Abstract

The utility model relates to the technical field of photovoltaic inverters, in particular to a phase change heat dissipation device for a power inductor. The phase-change radiator comprises a vertically-arranged phase-change radiator body, the phase-change radiator body is in a 7 shape, an enclosure frame is arranged on the inner wall face of the vertical portion of the 7-shaped phase-change radiator body, the enclosure frame is hollow and forms an annular hollow cavity, the front end face and the rear end face of the enclosure frame are open, and the rear end face of the enclosure frame abuts against the inner wall face of the phase-change radiator body. The enclosure frame is fixedly matched with the phase change radiator; radiating fins are arranged on the outer wall surface of the phase change radiator, the radiating fins are positioned on the outer wall surface of the 7-shaped transverse part of the phase change radiator when no liquid absorbing core is arranged in the phase change radiator, and the radiating fins are arranged at any position of the phase change radiator when the liquid absorbing core is arranged in the phase change radiator; and an inductor body is arranged in the annular hollow cavity. According to the technical scheme, the problems that the product design layout scheme is limited, and the heat dissipation capacity is limited are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to photovoltaic inverter technical field, specifically is a phase change heat abstractor for power inductance. BACKGROUND

[0002] Power inductance is an important component of photovoltaic inverter, and a large amount of heat will be generated in the working process, if not through effective heat dissipation measures, power inductance may appear insulation failure, magnetic core over-temperature failure and other bad, eventually to photovoltaic inverter cannot work normally. At present, the general technology is to pour the power inductance in the aluminum alloy shell with fin by heat conduction pouring sealant, then realizes the heat dissipation of inductance through natural air cooling or forced air cooling.

[0003] The structure of prior art is single, and the heat dissipation fin can only be arranged on the shell, which limits the layout scheme during product design, and the heat dissipation capacity is limited by the thermal conductivity coefficient of the shell material. UTILITY MODEL CONTENT

[0004] The utility model discloses a phase change heat abstractor for power inductance, which solves the problems of limited product design layout scheme and limited heat dissipation capacity.

[0005] To solve the above problems, the following technical scheme is provided:

[0006] The phase change heat abstractor for power inductance comprises a phase change radiator arranged in a vertical manner, the phase change radiator is in a 7 shape, a surrounding frame is arranged on the inner wall surface of the vertical part of the phase change radiator in a 7 shape, the surrounding frame is in a hollow shape, forming an annular hollow cavity, and the front end surface and the rear end surface of the surrounding frame are both in an open state, the rear end surface of the surrounding frame is in abutment with the inner wall surface of the phase change radiator, and the surrounding frame and the phase change radiator are in fixed cooperation; the outer wall surface of the phase change radiator is provided with heat dissipation fins, when there is no liquid absorption core in the phase change radiator, the heat dissipation fins are located on the outer wall surface of the horizontal part of the phase change radiator in a 7 shape, when the phase change radiator is provided with a liquid absorption core, the heat dissipation fins are arranged at any position of the phase change radiator; and the annular hollow cavity is provided with an inductance body.

[0007] The inductor body in the utility model is cooled by phase change heat sink technology, which is a heat transfer technology that uses the phase change of working medium in the phase change heat sink between gas and liquid to transfer heat.

[0008] The inductor body is fixed in the annular hollow cavity.

[0009] The inductor body is fixed in the annular hollow cavity.

[0010] The cavity between the inductor body and the frame is filled with heat-conducting glue.

[0011] The heat-conducting glue connects the inductor body and the frame, conducts heat from the inductor body to the frame, effectively reduces the heat accumulation in the equipment, and prolongs the service life of the inductor body.

[0012] The frame and the phase change heat sink are fixedly connected by welding.

[0013] The frame and the phase change heat sink are fixedly connected by welding.

[0014] The frame and the phase change heat sink are fixedly connected by welding.

[0015] The frame is made of aluminum alloy.

[0016] The aluminum alloy frame has good electric conductivity, heat conductivity, corrosion resistance and high temperature resistance.

[0017] The above scheme has the following advantages:

[0018] The inductor body in the utility model completes heat dissipation through phase change heat dissipation technology, the phase change heat dissipation technology is completed by the working medium inside the phase change radiator converting between gas-liquid two-phase states to complete heat transfer; the phase change radiator contains an evaporation section, an adiabatic section and a condensation section, the evaporation section and the adiabatic section are located in the vertical part of the phase change radiator 7, and the condensation section is located in the horizontal part of the phase change radiator 7; when the phase change radiator works, the liquid working medium of the evaporation section is heated by the heating device and absorbs latent heat to vaporize into a gaseous state; the steam flows to the condensation section through the adiabatic section; the gaseous working medium exchanges heat with the outside air in the condensation section, releases latent heat and condenses into a liquid; if the phase change radiator has a wick inside, the working medium returns to the evaporation section by the capillary force of the wick; if the phase change radiator only has microchannels inside, the working medium returns to the evaporation section by gravity; the working medium in the evaporation section absorbs heat and evaporates again; the working medium transfers the heat from the evaporation section to the condensation section through the above-mentioned cycle, which is beneficial to the heat dissipation capacity of the device; due to the characteristics of the phase change radiator, the heat dissipation fins can be flexibly arranged at various positions; when the heat dissipation fins are arranged at the top of the phase change radiator, the working medium can return completely by gravity at this time, and the wick can be omitted, thereby simplifying the structure; when the heat dissipation fins are arranged at other positions, only the wick needs to be added, which greatly improves the flexibility of the device. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to make the content of the utility model more easily understood clearly, the utility model is further explained in detail below according to the specific embodiments of the utility model and in combination with the drawings, wherein:

[0020] Figure 1 It is a structure schematic view of a phase change heat dissipation device for a power inductor;

[0021] Figure 2 It is an explosion view of a phase change heat dissipation device for a power inductor;

[0022] Figure 3 It is a side view of a phase change heat dissipation device for a power inductor;

[0023] Figure 4 It is a structure schematic view of a phase change heat dissipation device for a power inductor;

[0024] Figure 5 It is a structure schematic view of a phase change heat dissipation device for a power inductor;

[0025] 1, phase change radiator; 2, frame; 3, heat dissipation fin; 4, inductor body. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0027] In the specific embodiment 1, as shown in Figure 1 and Figure 3 The phase change radiator 1 is arranged vertically, and the phase change radiator 1 is in the shape of 7. The inner wall surface of the vertical part of the phase change radiator 1 in the shape of 7 is provided with a frame 2. The frame 2 is hollow, forming an annular hollow cavity. The front end surface and the rear end surface of the frame 2 are both in an open state. The rear end surface of the frame 2 is in abutment with the inner wall surface of the phase change radiator 1, and the frame 2 is fixedly matched with the phase change radiator 1. The heat transfer is completed through the conversion of the working medium in the phase change radiator 1 between the gas-liquid two-phase states. The phase change radiator 1 contains an evaporation section, an adiabatic section and a condensation section. The evaporation section and the adiabatic section are located in the vertical part of the phase change radiator 1 in the shape of 7, and the condensation section is located in the horizontal part of the phase change radiator 1 in the shape of 7. When the phase change radiator 1 works, the liquid working medium of the evaporation section is heated by the heating device, absorbs latent heat and vaporizes into a gaseous state. The steam flows to the condensation section through the adiabatic section. The gaseous working medium exchanges heat with the external air in the condensation section, releases latent heat and condenses into a liquid. The liquid working medium accumulated in the condensation section returns to the evaporation section by the capillary force of the wick if the phase change radiator 1 has the wick, or returns to the evaporation section by gravity if the phase change radiator 1 only has microchannels. The working medium in the evaporation section absorbs heat and vaporizes again. The working medium transfers the heat from the evaporation section to the condensation section through the above-mentioned cycle, and the heat dissipation is completed.

[0028] As shown in Figure 2 , the inductor body 4 is arranged in the annular hollow cavity. The cavity between the inductor body 4 and the frame 2 is provided with a heat-conducting pouring glue, so that the inductor body 4 is fixedly arranged in the frame 2. The heat-conducting pouring glue conducts heat from the inductor body 4 to the frame 2, effectively reduces the heat accumulation in the equipment, and prolongs the service life of the inductor body 4.

[0029] The frame 2 is an aluminum alloy frame, which has good electrical conductivity, heat conductivity, corrosion resistance and high temperature resistance.

[0030] As shown in Figure 4As shown, the outer wall surface of the phase change radiator 1 is provided with the heat dissipation fins 3. When there is no wick in the phase change radiator 1, the heat dissipation fins 3 are located on the outer wall surface of the 7-shaped horizontal part of the phase change radiator 1. At this time, the working medium can be returned by gravity, and the wick can be omitted, thereby simplifying the internal structure of the phase change radiator 1.

[0031] In a specific embodiment 2, as shown in the figure, Figure 5 The difference between this embodiment and embodiment 1 is that, in this embodiment, when the phase change radiator 1 is provided with a wick, the heat dissipation fins 3 can be flexibly arranged at any position of the phase change radiator 1, which is beneficial to improve the flexibility of the device.

[0032] In a specific embodiment 3, as shown in the figure, Figure 1 The difference between this embodiment and embodiments 1 and 2 is that, in this embodiment, the frame 2 and the phase change radiator 1 are fixedly matched by welding or screw locking.

[0033] During operation, the inductor body 4 generates a large amount of heat, and the working medium in the phase change radiator 1 can be converted between gas-liquid two-phase states to realize heat transfer. The liquid working medium in the evaporation section is heated by the inductor body 4 to absorb latent heat and vaporize into a gaseous state. The steam flows to the condensation section through the adiabatic section. The gaseous working medium exchanges heat with the outside air in the condensation section to release latent heat and condense into a liquid. The liquid working medium accumulated in the condensation section returns to the evaporation section by the capillary force of the wick if the phase change radiator 1 has a wick. At this time, the heat dissipation fins 3 can be flexibly arranged at any position of the phase change radiator 1. If the phase change radiator 1 only has a microchannel, the fins need to be arranged on the outer wall surface of the 7-shaped horizontal part of the phase change radiator 1, and the working medium can return to the evaporation section by gravity. The working medium absorbs heat and evaporates again in the evaporation section. The working medium can transfer the heat on the inductor body 4 from the evaporation section to the condensation section through the above-mentioned cycle, thereby realizing heat dissipation of the inductor body 4.

[0034] In the description of the utility model, need understanding is, the orientation or position relation indicated by the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like are based on the orientation or position relation shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore can not be understood as limiting the utility model. In the description of the utility model, unless otherwise specified and limited, it needs to be explained that the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be mechanical connection or electrical connection, it can be the communication of the internal two elements, it can be directly connected, or indirectly connected through an intermediate medium, and for ordinary skilled persons in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0035] Obviously, the above embodiments are only examples for clearly illustrating, and are not limited to the embodiments, and for ordinary skilled persons in the art, other different forms of changes or variations can be made on the basis of the above description, and it is not necessary and impossible to enumerate all the embodiments here, and the obvious changes or variations derived therefrom are still within the protection scope of the utility model.

Claims

1. A phase-change heat dissipation device for power inductors, characterized in that, The device includes a vertically arranged phase change heat sink (1), which is 7-shaped. A frame (2) is provided on the inner wall of the vertical part of the 7-shaped phase change heat sink (1). The frame (2) is hollow, forming an annular hollow cavity. The front and rear faces of the frame (2) are open. The rear face of the frame (2) abuts against the inner wall of the phase change heat sink (1). The frame (2) and the phase change heat sink (1) are fixedly fitted. Heat dissipation fins (3) are provided on the outer wall of the phase change heat sink (1). When there is no liquid wick in the phase change heat sink (1), the heat dissipation fins (3) are located on the outer wall of the horizontal part of the 7-shaped phase change heat sink (1). When there is a liquid wick in the phase change heat sink (1), the heat dissipation fins (3) are located at any position of the phase change heat sink (1). An inductor body (4) is provided in the annular hollow cavity.

2. The phase-change heat dissipation device for power inductors as described in claim 1, characterized in that, The inductor body (4) is fixedly disposed in the annular hollow cavity.

3. The phase-change heat dissipation device for power inductors as described in claim 2, characterized in that, Thermally conductive potting compound is provided in the cavity between the inductor body (4) and the frame (2).

4. The phase-change heat dissipation device for power inductors as described in claim 1, characterized in that, The frame (2) and the phase change heat sink (1) are fixed together by welding.

5. The phase-change heat dissipation device for power inductors as described in claim 1, characterized in that, The frame (2) and the phase change heat sink (1) are fixed together by screws.

6. The phase-change heat dissipation device for power inductors as described in claim 1, characterized in that, The enclosure (2) is made of aluminum alloy.

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