Thermally conductive fin modules and thick film heating elements
By designing a thermal fin module with different boss structures of different heights, the dry burning problem caused by bubble attachment in the flow heater is solved, and the effect of reducing the risk of damage to the heating disk is achieved.
Patent Information
- Application Number
- CN202421404436.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-19
- Publication Date
- 2025-04-01
- Estimated Expiration
- 2034-06-19
AI Technical Summary
In the flow heater, bubbles are prone to adhere to the heating plate and fins, resulting in dry burning and damage to the heating plate.
A thermal fin module is designed, whose fins include a boss structure with different heights arranged at intervals, allowing liquid to flow through, and disturb the direction of liquid flow through the height difference, puncture the bubbles in the liquid.
It effectively reduces the risk of bubbles adhering to the heating disk and fins, reduces the possibility of damage to the heating disk, and improves the reliability of the flow heater.
Smart Images
Figure CN222703520U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of heating devices, and in particular to a heat-conducting fin module and a thick film heating element. Background Art
[0002] A flow heater is a heating device for heating liquids such as water or aqueous solutions, and is generally used in vehicles such as automobiles or various engineering machinery. The flow heater is provided with a heating plate and heat-conducting fins (also known as "heat-conducting fins"). The heating plate generally adopts thick film heating technology, that is, it includes a substrate and a heating coil arranged on one side of the substrate, and the fins are arranged on the other side of the substrate. The heating coil is electrically heated, and the fins conduct heat to the liquid to achieve liquid heating.
[0003] When applied to scenes such as automobiles, flow heaters are developed with the consistent goal of compact design, low manufacturing cost and high efficiency, so that a large amount of flowing liquid can be heated to the required temperature in a short time. Based on this, the heating power of the heating plate is high and the heating rate is large, and bubbles are easily generated in the liquid, such as bubbles originally carried by the liquid before being input into the flow heater, bubbles generated by the flow during the process of being input into the cavity of the flow heater, and bubbles formed by the generation of gas by the liquid during the heating process. These bubbles are easy to adhere to the heating plate and fins, resulting in dry burning in the attachment area, especially when the amount of bubbles is large, the dry burning area is large, which is easy to cause damage to the heating plate. Utility Model Content
[0004] In view of this, the present application provides a heat-conducting fin module and a thick-film heater, which can improve the problem that bubbles adhere to the heating plate and the fins and easily cause damage to the heating plate.
[0005] The present application provides a heat-conducting fin module, comprising a plurality of fins, wherein the fins include first bosses and second bosses arranged at staggered intervals, wherein the first bosses and the second bosses are both hollow inside, and the height of the first boss is greater than the height of the second boss, wherein the first bosses and the second bosses of a portion of the fins are connected to form a first channel, the first bosses and the second bosses of another portion of the fins are connected to form a second channel, and the first bosses and the second bosses of another portion of the fins are connected to form a third channel, and the third channel is used to connect the first channel and the second channel.
[0006] Optionally, the multiple fins include a first fin, a second fin and a third fin, the first fin and the second fin are arranged opposite to each other along a first direction, and the third fin is arranged between the first fin and the second fin; the first boss and the second boss of the first fin are connected in the second direction to form the first channel, the first boss and the second boss of the second fin are connected in the opposite direction of the second direction to form the second channel, and the first boss and the second boss of the third fin are connected in the first direction to form the third channel.
[0007] Optionally, the third fin includes multiple rows of first bosses and second bosses, the first fin and the second fin include multiple columns of first bosses and second bosses respectively, and the orthographic projection of the third fin along the third direction is trapezoidal; one end of each row of the third fin is adjacent to and connected to a column corresponding to the first fin, and the other end is adjacent to and connected to a column corresponding to the second fin.
[0008] Optionally, in the first fin and the second fin, the first bosses located in the same row are aligned along the first direction, and the second bosses located in the same row are aligned along the first direction;
[0009] And / or, in the third fins, the first bosses located in the same column are aligned along the second direction, and the second bosses located in the same column are aligned along the second direction.
[0010] Optionally, any first boss is connected to the bottom of an adjacent second boss, the bottoms of any two adjacent first bosses are connected, and the bottoms of any two adjacent second bosses are connected.
[0011] Optionally, in at least one of the first fin, the second fin and the third fin, bottoms of the first boss and the second boss are located on the same plane.
[0012] Optionally, the number of rows of the first fins is greater than the number of rows of the second fins.
[0013] Optionally, the cross-sections of the first boss and the second boss are both trapezoidal.
[0014] Optionally, the first boss includes a first portion and a second portion disposed below the first portion, and a portion of the second boss other than the top wall overlaps with an orthographic projection of the second portion of the first boss located in the same direction.
[0015] Optionally, the height of the first boss is H1, the height of the second boss is H2, and they satisfy: 1 / 2*H1≦H2≦3 / 4*H1.
[0016] A thick film heating element provided in the present application comprises a heating plate and a thermally conductive fin module as described in any of the above items, wherein the heating plate comprises a substrate and a heating coil, the heating coil and the thermally conductive fin module are arranged on a first side surface and a second side surface of the substrate which are arranged opposite to each other, and the thermally conductive fin module is thermally connected to the substrate.
[0017] Optionally, the first boss and the second boss of the thermal fin module are welded to the second side surface of the substrate.
[0018] As described above, each fin of the thermal fin module designed in the present application includes a first boss and a second boss arranged at staggered intervals, the first boss and the second boss are both hollow inside and connected to allow liquid to flow through, and the height of the first boss is greater than the height of the second boss, which is equivalent to designing the thermal fin to have a boss structure with different heights. When the thermal fin module is suitable for a flow heater, during the flow of liquid, the boss structures with different heights will disturb the original flow direction of the liquid, thereby generating additional force on the bubbles in the liquid, thereby puncturing the bubbles in the liquid, thereby improving the dry burning caused by the bubbles adhering to the heating plate and the fins, and reducing the risk of damage to the heating plate. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 This is a schematic diagram of the structure of the heat-conducting fin module and the heating plate in the assembled state according to the embodiment of the present application;
[0020] Figure 2 yes Figure 1 A schematic diagram of the structure shown along a third direction;
[0021] Figure 3 yes Figure 1 The schematic diagram of the structure of the heat-conducting fin module and the heating plate in an unassembled state is shown;
[0022] Figure 4 It is a structural schematic diagram of a heat-conducting fin module provided in an embodiment of the present application.
[0023] First direction x Second direction y Third direction z
[0024] First fin 1 Second fin 2 Third fin 3
[0025] First boss 41 Second boss 42 Notch 43
[0026] Heating plate 20 Base plate 21 Heating coil 22 Solder pad 23
[0027] First pipeline 31 Second pipeline 32 DETAILED DESCRIPTION
[0028] In order to solve the above problems existing in the prior art, the present application provides a heat-conducting fin module and a thick film heater. The two protection themes are based on the same concept, and the principles of solving the problems are basically the same or similar. The implementation methods of each protection theme can refer to each other, and the repeated parts will not be repeated.
[0029] The thermal fin module includes a plurality of fins, wherein a portion of the fins are provided with a first channel, another portion of the fins are provided with a second channel, and another portion of the fins are provided with a third channel. The channel of the first channel and the second channel that always allows liquid to flow in can be called an "inflow channel", and the other channel that allows liquid to flow out can be called an "outflow channel". The third channel is used to connect the first channel and the second channel, so that the liquid can flow from the inflow channel to the outflow channel and finally flow out. In each fin, the present application designs each fin to include a first boss and a second boss arranged at staggered intervals, the first boss and the second boss are both hollow inside and connected along the arrangement direction to allow liquid to flow through, and the height of the first boss is greater than the height of the second boss, which is equivalent to designing the thermal fin as a boss structure of different heights.
[0030] In the thermal fin module of the present application, the specific expressions of parameters such as shape, quantity, size, etc. of each structural element including each fin, the first boss and the second boss can be determined according to the actual application scenario and the required adaptability of the configuration, and the present application does not limit them.
[0031] In order to make the purpose, technical solutions and advantages of the present application clearer, the technical solutions of the present application will be clearly described below in conjunction with specific embodiments and corresponding drawings. Obviously, the embodiments described below are only part of the embodiments of the present application, not all of the embodiments. In the absence of conflict, the following embodiments and their technical features can be combined with each other and also belong to the technical solutions of the present application.
[0032] In the description of the embodiments of the present application, terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", and "counterclockwise" 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 technical solutions of the corresponding embodiments, rather than indicating or implying that a device or element must have a specific orientation, be constructed and operated in a specific orientation, and should not be understood as a limitation on the present application.
[0033] For the convenience of describing and understanding the scheme of the present application, the width direction of the heat-conducting fin module (including the thick film heating element having the heat-conducting fin module) is referred to as the first direction x, the length direction (i.e., the height direction when in a standing posture) is referred to as the second direction y, and the thickness direction is referred to as the third direction z. The first direction x, the second direction y, and the third direction z are perpendicular to each other and can be regarded as the three coordinate axes of the three-dimensional rectangular coordinate system. It should be understood that the so-called verticality in the whole application does not require that the angle between the two must be 90°, but allows for a deviation of, for example, ±10°, that is, the so-called verticality can be understood as the angle between any two directions being 80° to 100°. Similarly, the so-called parallelism in the whole application does not require that the angle between the two must be 0° or 180°, but allows for a deviation of, for example, ±10°, that is, the so-called parallelism can be understood as the angle between any two directions being 0° to 10° or 170° to 190°.
[0034] Please also read Figures 1 to 4 , shows a heat conducting fin module of an optional embodiment of the present application. The heat conducting fin module includes a first fin 1, a second fin 2 and a third fin 3; along a first direction x, the first fin 1 and the second fin 2 are arranged opposite to each other, and the third fin 3 is arranged between the first fin 1 and the second fin 2. These fins can be aluminum alloy fins, or other fins that meet the heat conduction requirements.
[0035] Any one of the first fin 1, the second fin 2 and the third fin 3 is arranged in multiple rows (or in multiple columns), and any one includes a first boss 41 and a second boss 42, also called "bosses", which are arranged alternately along the corresponding row direction (or the corresponding column direction).
[0036] For example, see Figures 1 to 4 As shown, with the first direction x as the horizontal direction and the second direction y as the vertical direction, the third fin 3 includes multiple rows of bosses, each row is provided with multiple first bosses 41 and multiple second bosses 42, and the first fin 1 and the second fin 2 respectively include multiple columns of bosses, each column is provided with multiple first bosses 41 and multiple second bosses 42. The so-called staggered arrangement can be understood as: in an arrangement direction of the same column or an arrangement direction of the same row, a second boss 42 is provided between any two adjacent first bosses 41, and a first boss 41 is provided between any two adjacent second bosses 42. Any first boss 41 and the adjacent second boss 42 have a distance not equal to zero, that is, the two are arranged oppositely along the arrangement direction. Here, a gap 43 can be formed between the adjacent first bosses 41 and the second bosses 42 in the same row or the same column.
[0037] It should be understood that the number of rows of bosses included in the third fin 3, the number of columns of bosses included in the first fin 1 and the second fin 2, and the number of first bosses 41 and second bosses 42 provided in each row and column are not limited in this application; the first fin 1 shown in the figure is provided with seven columns of bosses, the second fin 2 is provided with six columns of bosses, and the third fin 3 is provided with six rows of bosses, which are only illustrative displays.
[0038] In one example, when observing along the line of sight in the third direction z, the orthographic projection of the third fin 3 is trapezoidal as a whole; along the first direction x, the lengths of each row of the first fin 1 (i.e., the lengths along the second direction y) decrease successively; along the opposite direction of the first direction x, the lengths of each row of the second fin 2 decrease successively. One end of each row of bosses of the third fin 3 is adjacent to a column corresponding to the first fin 1 and is connected to the hollow interior, and the other end is adjacent to a column corresponding to the second fin 2 and is connected to the hollow interior. Here, each third channel of the third fin 3 can be adjacent to and connected to the corresponding first channel and second channel. To adapt to this structural design, the specific shapes of each first boss 41 and each second boss 42 in any fin can be adaptively designed, for example, in Figures 1 to 4 In the example shown, in the adjacent area between the third fin 3 and the first fin 1 and the second fin 2 , the shape of the first boss 41 is different from that in other areas, and the shape of the second boss 42 in the adjacent area is also different from that in other areas.
[0039] like Figure 2 As shown, in either the first fin 1 or the second fin 2, the first bosses 41 in the same row are aligned along the first direction x, and the second bosses 42 in the same row are aligned along the first direction x. Optionally, in the third fin 3, the first bosses 41 in the same column are aligned along the second direction y, and the second bosses 42 in the same column are aligned along the second direction y. This alignment arrangement can align the gap 43 between the first boss 41 and the adjacent second boss 42, which is conducive to the liquid flowing out of the first boss 41 or the second boss 42 through the gap 43 to still flow smoothly toward the predetermined outlet, and re-flow into the first boss 41 or the second boss 42.
[0040] like Figure 1 and Figure 4As shown, the first boss 41 and the second boss 42 are both hollow inside. For example, the cross-section of any boss can be trapezoidal, and its upper wall and two side walls are both sheet-like parts, which are connected to each other to form a boss. In any of the first fin 1, the second fin 2 and the third fin 3, any first boss 41 is connected to the bottom of the adjacent second boss 42, the bottoms of any two adjacent first bosses 41 are connected, and the bottoms of any two adjacent second bosses 42 are connected. Here, for any fin, a groove is formed between two adjacent rows or two adjacent columns of bosses, and the groove is connected to the inside of the corresponding boss through the notch 43. The groove can also be regarded as the corresponding first channel, third channel and second channel. The cross-sectional shape of any fin (the xy cross-sectional shape of the first fin 1 and the second fin 2, and the xz cross-sectional shape of the third fin 3) is wavy as a whole. Such a shape is convenient for heat dissipation, and the heat can be quickly dissipated to quickly transfer to the liquid, while also increasing the heat conduction time between the liquid and the fin. In addition, any fin can be an integrally formed structural part, which can not only be produced, manufactured, transported and sold as an independent individual, but also facilitates rapid welding and assembly with a heating plate.
[0041] In one example, the bottoms of the first bosses 41 and the second bosses 42 of all fins and / or a portion of the fins are located on the same plane, and can be well welded to the flat heating plate 20 .
[0042] Continue reading Figures 1 to 4 For the convenience of description, this example is described by taking the first channel as the inflow channel and the second channel as the outflow channel as an example. It should be understood that other examples of the present application may also take the first channel as the outflow channel and the second channel as the inflow channel. In each column of the first fin 1, the plurality of first bosses 41 and the plurality of second bosses 42 are hollowly connected in the second direction y, thereby forming a first channel, and the liquid passes through, for example Figure 1 The first pipe 31 shown flows into the first channel. In each column of the second fin 2, a plurality of first bosses 41 and a plurality of second bosses 42 are connected in the opposite direction of the second direction y through hollow interiors, thereby forming a second channel. In each row of the third fin 3, a plurality of first bosses 41 and a plurality of second bosses 42 are connected in the first direction x to form a third channel, which is used to connect the first channel and the second channel, referring to the liquid flow direction shown by the blank arrow in the figure, so that the liquid can flow from the first channel of the first fin 1 to the second fin 2, and finally flow out from the second channel. Optionally, the liquid can flow from the first channel of the first fin 1 to the second fin 2, and finally flow out from the second channel. Optionally, the liquid can flow from the first channel of the first fin 1 to the second fin 2, and finally flow out from the second channel. Figure 1 The second pipe 32 shown flows out to the target area. During the flow process, the first fin 1, the second fin 2 and the third fin 3 transfer the heat from the heating plate 20 to the liquid flowing through their respective surfaces and the vicinity, thereby heating the liquid.
[0043] The height of the first boss 41 is designed to be greater than the height of the second boss 42 in the present application, and the so-called height is the maximum length along the third direction y. This is equivalent to designing each heat-conducting fin to have bosses of different heights. When the heat-conducting fin module is applied to a flow heater, during the flow of liquid, the height difference formed by the bosses of different heights will disturb the original flow direction of the liquid, thereby generating additional force on the bubbles in the liquid, thereby puncturing the bubbles in the liquid, thereby improving the dry burning caused by the bubbles adhering to the heating plate 20 and the fins, and reducing the risk of damage to the heating plate 20.
[0044] In one example, the height of the first boss 41 is H1, and the height of the second boss 42 is H2, and they satisfy: 1 / 2*H1≦H2≦3 / 4*H1. The height ratio of the two bosses is set within the threshold range, and the height difference between the two can better disturb the original flow direction of the liquid, and the additional force on the bubbles in the liquid is greater, so that the bubbles in the liquid can be punctured better.
[0045] In one example, the first boss 41 includes a first portion and a second portion arranged vertically along the second direction y, the second portion being arranged below the first portion, and the two portions may actually be an integrally formed structural member, that is, the two portions referred to herein are only for the convenience of description, and do not limit the two portions to be independently manufactured and then spliced to form the first boss 41. For the adjacent first boss 41 and second boss 42 located in the same direction, when observed along the same direction in which the two are located, the second boss 42 (the portion other than the top wall) overlaps with the orthographic projection of the second portion of the first boss 41.
[0046] In one example, the number of rows of the first fins 1 is greater than the number of rows of the second fins 2. In this case, the number of first channels is greater than the number of second channels. The liquid flows through and exchanges heat with the heat-conducting fin module for a longer time, so that the liquid can be heated to a desired temperature in a shorter time. The number of rows of the second fins 2 and the number of rows of the third fins 3 can be equal. For the bosses in the first fins 1 that are not connected to the corresponding third fins 3, for example Figure 2 The first channel formed by the outermost row of bosses can be diverted to a part or all of the third channels of the third fin 3 through the notch 43 .
[0047] The type of flow heater applicable to the thermal fin module of any of the above examples is not limited by the embodiments of the present application. For example, the thermal fin module can be applicable to at least one of a single-cavity flow heater, a double-cavity flow heater, and a flow heater with more than two cavities (i.e., a multi-cavity).
[0048] The present application also provides a thick film heating element, such as Figure 1 and Figure 3As shown, it includes a heating plate 20 and a thermally conductive fin module as in any of the above examples, so the thick film heater has the beneficial effects that can be produced by the thermally conductive fin module in the corresponding example, which will not be repeated here. The heating plate 20 includes a substrate (also called a "thermal conductive substrate") 21 and a heating coil 22, the heating coil 22 is arranged on the first side of the substrate 21, and is used to generate heat when powered on, the thermally conductive fin module is arranged on the second side of the substrate 21, the first side and the second side are two large surfaces of the substrate 21 that are arranged opposite to each other in the thickness direction, and the thermally conductive fin module (the first fin 1, the second fin 2 and the third fin 3) is thermally connected to the substrate 21.
[0049] exist Figure 1 and Figure 3 In the example shown, the first boss 41 and the second boss 42 of the thermal fin module are welded to the second side of the substrate 21. In other examples, the thermal fin module may have its own base substrate, the first boss 41 and the second boss 42 are welded to the base substrate, and fixed to the substrate 21 through the base substrate to achieve thermal connection with the heating plate 20.
[0050] It should be understood that the thick film heating element provided in the embodiment of the present application is a complete device and also has the corresponding structure of the known thick film heating element. For example, it is also provided with a number of welding pads 23 connected to the heating coil 22 and used to connect the heating coil 22 to electricity and ground, which will not be described one by one here.
[0051] The above descriptions are only some embodiments of the present application, and are not intended to limit the patent scope of the present application. For ordinary technicians in this field, all equivalent structural changes made using the contents of this specification and drawings are also included in the patent protection scope of the present application.
[0052] Although the terms "first, second", etc. are used herein to describe various information, such information should not be limited to these terms. These terms are only used to distinguish information of the same type from each other. In addition, the singular forms "one", "an", and "the" are intended to include plural forms as well. The terms "or" and "and / or" are interpreted as inclusive, or mean any one or any combination. Only when the combination of elements, functions, steps, or operations is inherently mutually exclusive in some way, an exception to this definition will occur.
Claims
1. A thermal fin module, characterized in that: The invention comprises a plurality of fins, wherein the fins comprise a first boss and a second boss arranged at an alternating interval, wherein the first boss and the second boss are both hollow inside, and the height of the first boss is greater than the height of the second boss, wherein the first boss and the second boss of a part of the fins are connected to form a first channel, the first boss and the second boss of another part of the fins are connected to form a second channel, and the first boss and the second boss of another part of the fins are connected to form a third channel, and the third channel is used to connect the first channel and the second channel.
2. The heat conducting fin module according to claim 1, characterized in that: The plurality of fins include a first fin, a second fin and a third fin, the first fin and the second fin are arranged opposite to each other along a first direction, and the third fin is arranged between the first fin and the second fin; The first boss and the second boss of the first fin are connected in the second direction to form the first channel, the first boss and the second boss of the second fin are connected in the opposite direction of the second direction to form the second channel, and the first boss and the second boss of the third fin are connected in the first direction to form the third channel.
3. The heat conducting fin module according to claim 2, characterized in that: The third fin comprises a plurality of rows of first bosses and second bosses, the first fin and the second fin respectively comprise a plurality of columns of first bosses and second bosses, and the orthographic projection of the third fin along the third direction is trapezoidal; One end of each row of the third fins is disposed adjacent to and connected to a column corresponding to the first fins, and the other end of each row of the third fins is disposed adjacent to and connected to a column corresponding to the second fins.
4. The heat conducting fin module according to claim 3, characterized in that: In the first fin and the second fin, the first bosses in the same row are aligned along the first direction, and the second bosses in the same row are aligned along the first direction; And / or, in the third fins, the first bosses located in the same column are aligned along the second direction, and the second bosses located in the same column are aligned along the second direction.
5. The thermal conductive fin module according to any one of claims 2 to 4, characterized in that: Any first boss is connected to the bottom of an adjacent second boss, the bottoms of any two adjacent first bosses are connected, and the bottoms of any two adjacent second bosses are connected.
6. The heat conducting fin module according to claim 5, characterized in that: In at least one of the first fin, the second fin, and the third fin, bottoms of the first boss and the second boss are located on the same plane.
7. The heat conducting fin module according to claim 3, characterized in that: The number of rows of the first fins is greater than the number of rows of the second fins.
8. The heat conducting fin module according to claim 1, characterized in that: The cross sections of the first boss and the second boss are both trapezoidal.
9. A thick film heating element, characterized in that: It comprises a heating plate and a thermally conductive fin module as claimed in any one of claims 1 to 8, wherein the heating plate comprises a substrate and a heating coil, the heating coil and the thermally conductive fin module are arranged on a first side surface and a second side surface of the substrate which are arranged opposite to each other, and the thermally conductive fin module is thermally connected to the substrate.
10. The thick film heating element according to claim 9, characterized in that The first boss and the second boss of the heat-conducting fin module are welded on the second side surface of the substrate.