Evaporation section structure, heat pipe device and photovoltaic inverter

Abstract

The utility model relates to an evaporation section structure, a heat pipe device and a photovoltaic inverter, the evaporation section structure comprises a core body and a sealing plate, the core body is internally provided with first channels, second channels and third channels which are communicated, the multiple first channels extend in the x-axis direction, the multiple second channels extend in the y-axis direction, and the third channels extend in the y-axis direction; the multiple third channels extend in the z-axis direction, and every two of the x-axis direction, the y-axis direction and the z-axis direction are perpendicular to each other. And the sealing plate covers the peripheral side and the bottom side of the core body in a sealing manner, the sealing plate is provided with a plurality of mounting gaps arranged at intervals, and at least part of the third channel penetrates through the surface of the core body and is communicated with the mounting gaps, so that the power element can be assembled at the mounting gaps in a sealing manner and passes through an opening covering the third channel. According to the evaporation section structure, the heat pipe device and the photovoltaic inverter provided by the invention, the problem that a heat pipe heat exchanger of an existing photovoltaic inverter is difficult to bear relatively high static pressure bursting pressure is solved.

Description

Technical Field

[0001] The present application relates to the field of photovoltaic heat dissipation technology, and in particular to an evaporation section structure, a heat pipe device and a photovoltaic inverter. Background Art

[0002] At present, most heat exchangers of photovoltaic inverters use heat pipe heat exchangers. With the increasingly stringent environmental protection requirements, the working fluid of heat pipe heat exchangers has higher and higher environmental protection requirements. At the same time, the heating power of photovoltaic inverters is getting larger and larger, which makes the working temperature of refrigerant continue to increase.

[0003] Under such circumstances, the requirements for the mechanical strength of heat pipe heat exchangers are becoming higher and higher. At present, the static pressure bursting pressure of heat pipe heat exchangers has reached 10MPa to 13MPa, and there is a trend of continued increase. Conventional heat pipe heat exchangers can no longer withstand such high static pressure bursting pressure. Utility Model Content

[0004] Based on this, it is necessary to provide an evaporation section structure, a heat pipe device and a photovoltaic inverter to solve the problem that the heat pipe heat exchanger of the existing photovoltaic inverter is difficult to withstand the high static pressure bursting pressure.

[0005] The evaporation section structure provided by the present application includes a core body and a sealing plate, wherein a first channel, a second channel and a third channel are connected in the core body, a plurality of first channels extend along the x-axis direction, a plurality of second channels extend along the y-axis direction, a plurality of third channels extend along the z-axis direction, and the x-axis direction, the y-axis direction and the z-axis direction are mutually perpendicular. The sealing cover of the sealing plate is arranged on the peripheral side and the bottom side of the core body, and the sealing plate is provided with a plurality of installation notches arranged at intervals, and at least part of the third channels penetrates the surface of the core body and connects to the installation notches, so that the power element can be sealed and assembled at the installation notches and through the opening of the third channel provided by the cover.

[0006] In one embodiment, the core is an integrally formed part.

[0007] In one embodiment, the cross-sectional shapes of the first channel, the second channel and the third channel are circular or elliptical.

[0008] In one embodiment, when the cross-sectional shapes of the first channel, the second channel and the third channel are circular, the inner diameters of the first channel, the second channel and the third channel are equal.

[0009] In one embodiment, when the cross-sectional shapes of the first channel, the second channel and the third channel are circular, the inner diameter of the first channel is equal to the inner diameter of the second channel, and the inner diameter of the third channel is greater than the inner diameter of the first channel.

[0010] In one embodiment, the sealing plate includes a first side plate, a second side plate, a third side plate, a fourth side plate and a bottom plate. The first side plate, the second side plate, the third side plate and the fourth side plate are respectively sealed and attached to the peripheral sides of the core body, and the bottom plate is sealed and attached to the bottom side of the core body.

[0011] In one embodiment, the first channel, the second channel and the third channel are interconnected in pairs.

[0012] In one embodiment, two of the first channel, the second channel and the third channel are connected to each other, and the third channel is directly connected to only one of the two.

[0013] In one embodiment, the core is in a cubic shape, the x-axis is along the length direction of the core, the y-axis is along the width direction of the core, and the z-axis is along the thickness direction of the core.

[0014] In one embodiment, the core is in a cubic shape, the x-axis direction and the length direction of the core are set at an acute angle, the y-axis direction and the width direction of the core are set at an acute angle, and the z-axis direction is along the thickness direction of the core.

[0015] The present application also provides a heat pipe device, which includes a condensing section structure and an evaporating section structure as described in any one of the above embodiments, and the condensing section structure is connected to the top side of the evaporating section structure.

[0016] The present application also provides a photovoltaic inverter, which includes the heat pipe device described in any one of the above embodiments.

[0017] Compared with the prior art, the evaporation section structure, heat pipe device and photovoltaic inverter provided by the present application are used to accommodate the working fluid by setting a plurality of three-dimensionally distributed channel structures (including a first channel, a second channel and a third channel) compared with the existing heat pipe heat exchanger. With such a setting, on the one hand, the side wall of the channel structure is equivalent to setting a reinforcing rib structure in the core, which can greatly enhance the overall structural strength of the evaporation section structure so that the evaporation section structure can withstand a higher static pressure bursting pressure. On the other hand, since the first channel, the second channel and the third channel are connected, the working fluid can flow freely in the core, and the first channel, the second channel and the third channel can also guide the flow of the working fluid, thereby improving the circulation efficiency of the working fluid to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the conventional technology, the drawings required for use in the embodiments or the conventional technology descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 A schematic diagram of the assembly structure of a heat pipe device and a power element according to an embodiment of the present application;

[0020] Figure 2 A schematic diagram of the assembly structure of the evaporation section structure and the power element of an embodiment provided in the present application;

[0021] Figure 3 An exploded view of the evaporation section structure of an embodiment provided in the present application;

[0022] Figure 4 A schematic diagram of the structure of a core body according to an embodiment of the present application;

[0023] Figure 5 for Figure 4 Schematic diagram of the local structure of the core Figure 1 ;

[0024] Figure 6 for Figure 4 Schematic diagram of the local structure of the core Figure 2 ;

[0025] Figure 7 A schematic diagram of a partial structure of a core body of another embodiment provided by the present application;

[0026] Figure 8 A schematic diagram of a partial structure of a core body according to another embodiment of the present application;

[0027] Fig. 9 A schematic diagram of the partial structure of a core body of yet another embodiment provided in the present application.

[0028] Figure numerals: 100, core; 110, first channel; 120, second channel; 130, third channel; 200, sealing plate; 210, first side plate; 220, second side plate; 230, third side plate; 240, fourth side plate; 250, bottom plate; 260, installation notch; 300, power element; 400, condensation section structure. DETAILED DESCRIPTION

[0029] At present, most heat exchangers of photovoltaic inverters use heat pipe heat exchangers. With the increasingly stringent environmental protection requirements, the working fluid of heat pipe heat exchangers has higher and higher environmental protection requirements. At the same time, the heating power of photovoltaic inverters is getting larger and larger, which makes the working temperature of refrigerant continue to increase.

[0030] Under such circumstances, the requirements for the mechanical strength of heat pipe heat exchangers are becoming higher and higher. At present, the static pressure bursting pressure of heat pipe heat exchangers has reached 10MPa to 13MPa, and there is a trend of continued increase. Conventional heat pipe heat exchangers can no longer withstand such high static pressure bursting pressure.

[0031] In order to solve the problem that the heat pipe heat exchanger of the existing photovoltaic inverter is difficult to withstand the high static pressure explosion pressure, the present application provides an evaporation section structure, a heat pipe device and a photovoltaic inverter.

[0032] See also Figure 1-Figure 9 The evaporation section structure includes a core body 100 and a sealing plate 200. The core body 100 is provided with a first channel 110, a second channel 120 and a third channel 130 that are connected. The multiple first channels 110 extend along the x-axis direction, the multiple second channels 120 extend along the y-axis direction, and the multiple third channels 130 extend along the z-axis direction. The x-axis direction, the y-axis direction and the z-axis direction are perpendicular to each other.

[0033] The sealing cover of the sealing plate 200 is arranged on the peripheral side and the bottom side of the core body 100, and the sealing plate 200 is provided with a plurality of installation notches 260 arranged at intervals. At least part of the third channel 130 passes through the surface of the core body 100 and is connected to the installation notches 260, so that the power element 300 (including but not limited to IGBT modules, chips, motors and batteries) can be sealed and assembled in the installation notches 260 and pass through the opening of the third channel 130.

[0034] Compared with the existing heat pipe heat exchanger, the evaporation section structure of the present application is used to accommodate the working medium by setting up a plurality of channel structures (including the first channel 110, the second channel 120 and the third channel 130) distributed in three dimensions. With such a setting, on the one hand, the side wall of the channel structure is equivalent to setting up a reinforcing rib structure in the core 100, which can greatly enhance the overall structural strength of the evaporation section structure, so that the evaporation section structure can withstand a higher static pressure bursting pressure. On the other hand, since the first channel 110, the second channel 120 and the third channel 130 are connected, the working medium can flow freely in the core 100, and the first channel 110, the second channel 120 and the third channel 130 can also guide the flow of the working medium, thereby improving the circulation efficiency of the working medium to a certain extent.

[0035] In one embodiment, the core 100 is an integrally formed part.

[0036] In this way, the structural strength and sealing effect of the core 100 can be improved.

[0037] Specifically, in one embodiment, the core body 100 is a 3D printed part, which can significantly improve the processing efficiency of the core body 100.

[0038] But not limited thereto, in another embodiment, the core 100 may also be an integrally cast component.

[0039] In one embodiment, if Figure 4 , Figure 5 , Figure 6, Figure 8 and Fig. 9 As shown, the cross-sectional shapes of the first channel 110 , the second channel 120 , and the third channel 130 are circular.

[0040] In another embodiment, if Figure 7 As shown, the cross-sectional shapes of the first channel 110 , the second channel 120 , and the third channel 130 are elliptical.

[0041] With such a configuration, the circular or elliptical channel structure can ensure the strength of the evaporation section structure to withstand the vapor pressure of the refrigerant to the maximum extent, and the circular or elliptical channel structure can construct a relatively large inner cavity volume, which can provide an inner cavity with the largest volume for the heat dissipation of the power element 300, thereby improving the heat dissipation efficiency of the working fluid.

[0042] Further, in one embodiment, when the cross-sectional shapes of the first channel 110 , the second channel 120 , and the third channel 130 are circular, the inner diameters of the first channel 110 , the second channel 120 , and the third channel 130 are equal.

[0043] In another embodiment, the inner diameter of the first channel 110 is equal to the inner diameter of the second channel 120 , and the inner diameter of the third channel 130 is greater than the inner diameter of the first channel 110 .

[0044] However, it is not limited thereto. In other embodiments, the cross-sectional shapes of the first channel 110 , the second channel 120 and the third channel 130 may also be square, triangular or other shapes, which are not listed here one by one.

[0045] In one embodiment, if Figure 2-Figure 4 As shown, the sealing plate 200 includes a first side plate 210, a second side plate 220, a third side plate 230, a fourth side plate 240 and a bottom plate 250. The first side plate 210, the second side plate 220, the third side plate 230 and the fourth side plate 240 are respectively sealed and attached to the peripheral sides of the core body 100, and the bottom plate 250 is sealed and attached to the bottom side of the core body 100.

[0046] It should be noted that for ease of processing, the first channel 110 and the second channel 120 also pass through the surface of the core 100 . At this time, the sealing plate 200 can seal the openings of the first channel 110 , the second channel 120 and the third channel 130 on the surface of the core 100 .

[0047] Specifically, in one embodiment, the first side plate 210 , the second side plate 220 , the third side plate 230 , the fourth side plate 240 and the bottom plate 250 are attached to the circumferential side and the bottom side of the core 100 by means of integral molding.

[0048] More specifically, the first side plate 210 , the second side plate 220 , the third side plate 230 , the fourth side plate 240 and the bottom plate 250 are attached to the circumferential side and the bottom side of the core 100 by 3D printing.

[0049] Alternatively, the first side plate 210 , the second side plate 220 , the third side plate 230 , the fourth side plate 240 and the bottom plate 250 are attached to the circumferential side and the bottom side of the core 100 by integral casting.

[0050] In another embodiment, the first side plate 210 , the second side plate 220 , the third side plate 230 , the fourth side plate 240 and the bottom plate 250 may also be attached to the circumferential side and the bottom side of the core 100 by welding.

[0051] To facilitate the processing of the first channel 110, the second channel 120 and the third channel 130, in another embodiment, the first side plate 210 and the second side plate 220 having a larger area and being arranged opposite to each other are welded to the peripheral side of the core 100, the third side plate 230 and the fourth side plate 240 having a smaller area and being arranged opposite to each other are integrally formed and connected to the core 100, and the bottom plate 250 is integrally formed and connected to the core 100.

[0052] Specifically, in one embodiment, the mounting notch 260 is disposed on the first side plate 210 and the second side plate 220 .

[0053] In one embodiment, the minimum distance between the third side plate 230, the fourth side plate 240 and the bottom plate 250 relative to the channel structure is greater than or equal to 3 mm, the spacing between adjacent first channels 110 is 2 mm, the spacing between adjacent second channels 120 is 2 mm, the sealing plate 200 is 3 mm thick, and the inner diameter of the first channel 110 and the inner diameter of the second channel 120 are both 10 mm.

[0054] In one embodiment, if Figure 4 , Figure 5 , Figure 6 and Fig. 9 As shown, the first channel 110 , the second channel 120 , and the third channel 130 are interconnected in pairs.

[0055] In this way, the flow efficiency of the working medium in the core 100 can be maximized.

[0056] In another embodiment, if Figure 7 and Figure 8 As shown, two of the first channel 110 , the second channel 120 and the third channel 130 are connected to each other, and the third channel 130 is directly connected to only one of the two.

[0057] For example, the first channel 110 and the second channel 120 are connected to each other, and the third channel 130 is directly connected to only one of the first channel 110 or the second channel 120. Alternatively, the first channel 110 and the third channel 130 are connected to each other, and the second channel 120 is directly connected to only one of the first channel 110 or the third channel 130. Alternatively, the third channel 130 and the second channel 120 are connected to each other, and the first channel 110 is directly connected to only one of the third channel 130 or the second channel 120.

[0058] In this configuration, compared with the first channel 110 , the second channel 120 and the third channel 130 being interconnected in pairs, the structural strength of the core 100 at the intersection of the channel structure in this embodiment is greater.

[0059] In one embodiment, if Figure 4-Figure 8 As shown, the core 100 is in a cubic shape, the x-axis direction is along the length direction of the core 100 , the y-axis direction is along the width direction of the core 100 , and the z-axis direction is along the thickness direction of the core 100 .

[0060] That is, the first channel 110 extends along the length direction of the core 100 , the second channel 120 extends along the width direction of the core 100 , and the third channel 130 extends along the thickness direction of the core 100 .

[0061] But not limited to this, in another embodiment, Fig. 9 As shown, the core 100 is in a cubic shape, the x-axis direction and the length direction of the core 100 are set at an acute angle, the y-axis direction and the width direction of the core 100 are set at an acute angle, and the z-axis direction is along the thickness direction of the core 100.

[0062] Preferably, the angle between the x-axis direction and the length direction of the core 100 is 45 degrees, and the angle between the y-axis direction and the width direction of the core 100 is 45 degrees.

[0063] See also Figure 1 The present application also provides a heat pipe device, which includes a condensing section structure 400 and an evaporating section structure as described in any one of the above embodiments, and the condensing section structure 400 is connected to the top side of the evaporating section structure.

[0064] The present application also provides a photovoltaic inverter, which includes the heat pipe device described in any one of the above embodiments.

[0065] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0066] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the scope of patent protection of the present application shall be subject to the attached claims.

[0067] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0068] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0069] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0070] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0071] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0072] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

Claims

1. An evaporation section structure, characterized in that: The invention comprises a core body (100) and a sealing plate (200), wherein a first channel (110), a second channel (120) and a third channel (130) are connected in the core body (100), a plurality of first channels (110) extend along the x-axis direction, a plurality of second channels (120) extend along the y-axis direction, a plurality of third channels (130) extend along the z-axis direction, and the x-axis direction, the y-axis direction and the z-axis direction are perpendicular to each other; The sealing cover of the sealing plate (200) is arranged on the peripheral side and the bottom side of the core body (100), and the sealing plate (200) is provided with a plurality of installation notches (260) arranged at intervals, and at least a portion of the third channel (130) passes through the surface of the core body (100) and is connected to the installation notches (260), so that the power element (300) can be sealed and assembled at the installation notches (260) and pass through the opening of the third channel (130) provided by the cover.

2. The evaporation section structure according to claim 1, characterized in that: The core body (100) is an integrally processed part.

3. The evaporation section structure according to claim 1, characterized in that: The cross-sectional shapes of the first channel (110), the second channel (120) and the third channel (130) are circular or elliptical.

4. The evaporation section structure according to claim 3, characterized in that: When the cross-sectional shapes of the first channel (110), the second channel (120) and the third channel (130) are circular, the inner diameters of the first channel (110), the second channel (120) and the third channel (130) are equal; Alternatively, when the cross-sectional shapes of the first channel (110), the second channel (120) and the third channel (130) are circular, the inner diameter of the first channel (110) is equal to the inner diameter of the second channel (120), and the inner diameter of the third channel (130) is greater than the inner diameter of the first channel (110).

5. The evaporation section structure according to claim 1, characterized in that: The sealing plate (200) includes a first side plate (210), a second side plate (220), a third side plate (230), a fourth side plate (240) and a bottom plate (250); the first side plate (210), the second side plate (220), the third side plate (230) and the fourth side plate (240) are respectively sealed and attached to the peripheral sides of the core body (100); and the bottom plate (250) is sealed and attached to the bottom side of the core body (100).

6. The evaporation section structure according to claim 1, characterized in that: The first channel (110), the second channel (120) and the third channel (130) are interconnected in pairs; Alternatively, two of the first channel (110), the second channel (120) and the third channel (130) are connected to each other, and the third channel is directly connected to only one of the two.

7. The evaporation section structure according to claim 1, characterized in that: The core (100) is in a cubic shape, the x-axis direction is along the length direction of the core (100), the y-axis direction is along the width direction of the core (100), and the z-axis direction is along the thickness direction of the core (100).

8. The evaporation section structure according to claim 1, characterized in that: The core (100) is in a cubic shape, the x-axis direction and the length direction of the core (100) are arranged at an acute angle, the y-axis direction and the width direction of the core (100) are arranged at an acute angle, and the z-axis direction is along the thickness direction of the core (100).

9. A heat pipe device, characterized in that: It comprises a condensation section structure (400) and an evaporation section structure according to any one of claims 1 to 8, wherein the condensation section structure (400) is connected to the top side of the evaporation section structure.

10. A photovoltaic inverter, characterized in that: Comprising the heat pipe device as claimed in claim 9.

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