Positive temperature coefficient (PTC) heating block with strong compression resistance

Abstract

The utility model relates to a strong compression resistance PTC heating block, which comprises a plurality of heat dissipation strips and PTC heating blocks arranged among the heat dissipation strips, each heat dissipation strip is composed of a heat dissipation aluminum strip and a heat conduction aluminum strip, at least one side of the heat conduction aluminum strip is provided with the heat dissipation aluminum strip, a connecting edge is wrapped outside the heat dissipation aluminum strip, the PTC heating blocks are fixed on the connecting edge in an adhesive mode, and the PTC heating blocks are connected with the heat dissipation aluminum strip. The heat dissipation aluminum strip is composed of a plurality of aluminum strip bodies of an n-shaped structure, the bottoms of every two adjacent aluminum strip bodies of the n-shaped structure are connected to form a corrugated structure, a parallel attaching bottom face is formed at the bottom connecting position and used for being attached to the fixing edge to be fixed, and the upper surface of the n shape is attached to the heat conduction aluminum strip. The LED lamp has the advantages of being simple in structure, firm in fixation, good in heat dissipation performance, high in overall strength, long in service life and the like.

Description

Technical Field

[0001] This utility model belongs to the technical field of PTC heating blocks, specifically relating to a high-pressure resistant PTC heating block. Background Technology

[0002] PTC heaters, also known as PTC heating elements, are electric heaters. The PTC heating block is one of the components of a PTC heater, installed inside for overall heating. The PTC heating block consists of heat-dissipating aluminum strips and corrugated aluminum strips. Due to the corrugated design, the following problems arise: the area of ​​the bonding surface (a single line) at the bends of the corrugated aluminum strip is very small, resulting in poor stability after bonding. Furthermore, the PTC heating block is exposed to high temperatures for extended periods, causing thermal expansion and contraction, leading to deformation and further affecting the bonding effect, potentially resulting in delamination or loosening of the bonding surface. Since the PTC heating block needs to operate at high temperatures for extended periods, its heat dissipation performance is crucial. Therefore, a high-pressure-resistant PTC heating block was designed to overcome these problems. Summary of the Invention

[0003] The purpose of this utility model is to overcome the shortcomings of the existing technology and provide a high-pressure resistant PTC heating block with simple structure, firm fixation, good heat dissipation, high overall strength and long service life.

[0004] This utility model is achieved through the following technical solution: a high-pressure resistant PTC heating block, which includes multiple heat dissipation strips and PTC heating blocks disposed between the heat dissipation strips. The heat dissipation strips are composed of heat dissipation aluminum strips and heat-conducting aluminum strips. At least one side of the heat-conducting aluminum strip is equipped with a heat dissipation aluminum strip. A connecting edge is wrapped around the heat dissipation aluminum strip. A PTC heating block is glued and fixed on the connecting edge. The heat dissipation aluminum strips are composed of multiple Z-shaped aluminum strips. The bottoms of two adjacent Z-shaped aluminum strips are connected to form a corrugated structure, and the bottom connection forms a parallel fitting bottom surface for fixing to the fixed edge. The upper surface of the Z-shape is glued to the heat-conducting aluminum strip.

[0005] Preferably, the aluminum strip with the Z-shaped structure has multiple rectangular notches and connecting surfaces on both sides, and the notches and connecting surfaces are arranged in a cross pattern, connecting with the notches and connecting surfaces on the adjacent aluminum strip block on the other side to form a concave-convex and hollow heat dissipation channel.

[0006] Preferably, the rectangular notches and connecting surfaces on the two adjacent aluminum strips are arranged in the same direction, forming a regular convex-concave structure air duct.

[0007] Preferably, the rectangular notches and connecting surfaces on the two adjacent aluminum strips are arranged in a mirror image. When the two protruding rectangles are opposite each other, a certain gap is left in the middle to form a small air duct. When the two concave rectangles are opposite each other, they form an air storage chamber. The gaps and air storage chambers are arranged alternately to allow hot air to be discharged evenly from the air storage chamber.

[0008] Preferably, the two ends of the connecting edge are provided with a edging, which wraps the entire heat dissipation aluminum strip inside, with its end close to the heat-conducting aluminum strip and a certain gap between it and the heat-conducting aluminum strip for heat dissipation.

[0009] Preferably, one end of the thermally conductive aluminum strip has a protruding connector, a plug is fitted on the connector and fixed by screws, and a plug-in piece is provided at the end of the plug away from the connector, with a circular connecting through hole on the plug-in piece.

[0010] The beneficial effects of this utility model are as follows:

[0011] 1. This utility model uses a corrugated structure heat dissipation aluminum strip formed by connecting the bottoms of multiple Z-shaped aluminum strips. Compared with existing corrugated aluminum strips, it can significantly increase the bonding area, resulting in better stability of the heat dissipation aluminum strip after bonding and fixing.

[0012] 2. This utility model, through the design of the connecting strip and the surrounding edge, can greatly improve the connection stability between the PTC heating block, the heat-conducting aluminum strip and the corrugated aluminum strip, as well as improve the overall strength, thereby increasing the overall service life.

[0013] 3. This utility model, through its designed concave-convex and hollow heat dissipation air duct, can effectively improve the heat dissipation performance of the heat dissipation aluminum strip, reduce deformation caused by thermal expansion and contraction during long-term high-temperature operation, and thus improve the overall service life. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model.

[0015] Figure 2 This is a schematic diagram of the exploded structure of this utility model.

[0016] Figure 3 This is a schematic diagram of the heat dissipation aluminum strip in this utility model.

[0017] Figure 4 for Figure 3 Enlarged view of point A. Detailed Implementation

[0018] To enable those skilled in the art to more clearly understand the purpose, technical solution, and advantages of the present invention, the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0019] In the description of this invention, it should be understood that the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "inner", "outer", "lateral", and "vertical" are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this invention, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, and therefore should not be construed as a limitation of this invention.

[0020] The invention will now be described in detail with reference to the accompanying drawings: Figure 1-2 As shown, a high-pressure resistant PTC heating element includes multiple heat dissipation strips 1 and PTC heating elements 2 disposed between the heat dissipation strips 1. Each heat dissipation strip 1 is composed of heat-dissipating aluminum strips 3 and heat-conducting aluminum strips 4. At least one side of each heat-conducting aluminum strip 4 is fitted with a heat dissipation aluminum strip 3. A connecting edge 5 is wrapped around the heat dissipation aluminum strip 3, and the PTC heating elements 2 are adhered and fixed to the connecting edge 5. Figure 3-4 As shown, the heat dissipation aluminum strip 3 is composed of multiple aluminum strips 6 with a Z-shaped structure. The bottoms of two adjacent Z-shaped aluminum strips 6 are connected to form a corrugated structure, and a parallel bottom surface 7 is formed at the bottom connection point for fixing to the fixed edge. The upper surface of the Z-shape is adhered to the heat-conducting aluminum strip 4.

[0021] This utility model uses a corrugated structure aluminum strip formed by connecting the bottoms of multiple Z-shaped aluminum strips. Compared with existing corrugated aluminum strips, it can significantly increase the bonding area, resulting in better stability of the heat dissipation aluminum strip after bonding and fixing.

[0022] The aluminum strip 6 with the Z-shaped structure has multiple rectangular notches 8 and connecting surfaces 9 on both sides. The notches 8 and connecting surfaces 9 are arranged in a cross pattern and are connected to the notches 8 and connecting surfaces 9 on the adjacent aluminum strip block on the other side to form a concave-convex and hollow heat dissipation channel 10.

[0023] This invention, through its designed concave-convex and hollow heat dissipation air ducts, can effectively improve the heat dissipation performance of the heat dissipation aluminum strips, reduce deformation caused by thermal expansion and contraction during prolonged high-temperature operation, and thus improve the overall service life.

[0024] The rectangular notches 8 and connecting surfaces 9 on the two adjacent aluminum strips 6 can be arranged in the same direction to form a regular convex and concave structure air duct.

[0025] The rectangular notches 8 and connecting surfaces 9 on the two adjacent aluminum strips 6 can also be arranged in a mirror image. When the two protruding rectangles are opposite each other, a certain gap is left in the middle to form a small air duct. When the two concave rectangles are opposite each other, they form an air storage chamber. The gaps and air storage chambers are arranged alternately to allow hot air to be discharged evenly from the air storage chamber.

[0026] The connecting edge 5 has a edging 11 at both ends, which wraps the entire heat dissipation aluminum strip 3 inside. Its end is close to the heat-conducting aluminum strip 4, and a certain gap is left between it and the heat-conducting aluminum strip 4 for heat dissipation.

[0027] This invention, through its designed connecting strips and edging, can greatly improve the connection stability between the PTC heating block, the heat-conducting aluminum strip, and the heat-dissipating aluminum strip, as well as enhance the overall strength and thus extend the overall service life.

[0028] One end of the thermally conductive aluminum strip 4 has a protruding connector 12. A plug 13 is fitted onto the connector 12 and fixed by screws. A plug piece 14 is provided at the end of the plug 13 away from the connector 12. A circular connection through hole 15 is provided on the plug piece 14 to facilitate connection with external devices. The overall practicality is good.

[0029] More specifically, the heat dissipation aluminum strip in this utility model consists of three rectangles on the left and three on the right. The left and right rectangles are interconnected, and the top and bottom contacts the punch plate and the bent edge surface. The thickness of the corrugated material has been changed from the original 0.28mm to 0.14mm. Innovations include: increased pressure resistance when the heating block is clamped, improved overall strength, and better adhesion between the heating element and the punch aluminum sheet, resulting in higher thermal conductivity, enhanced mechanical strength of the heating block, increased power, and improved anti-aging ability of the PTC heating block. The contact between the corrugated strip and the punch plate has changed from a single wave crest line contact to multiple surface contacts, making the fixation more stable and the heat conduction effect better.

[0030] The heat dissipation aluminum strip of this invention consists of one or more open rectangular strips connected in a staggered pattern and installed inside the connecting edge. A brazed aluminum sheet (or a bent sheet with its own composite material) is placed on the mating surface of the rectangular heat dissipation corrugation and the connecting edge. A straight aluminum sheet is attached to the other plane of the rectangular corrugation, and a brazing sheet (or a bent sheet with its own composite material) is also placed there. The aluminum strip is welded using a high-temperature brazing process. A flat sheet extends out to form rectangular corrugations, and lead terminals are riveted using a press-fit process. The heating block consists of one or more heat dissipation aluminum strips with roughened surfaces, uniformly coated with thermally conductive silicone, and multiple PTC thermistors arranged sequentially between every two heat dissipation aluminum strips. After being secured with tooling, it is heated and cured in a kiln (or by connecting a power source to the lead terminals of the aluminum heat dissipation strip between each row of PTC thermistors, allowing the adhesive to cure through self-heating) so that the aluminum heat dissipation strips are bonded to the PTC thermistor sheets using thermally conductive silicone.

[0031] The specific embodiments described herein are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A strong pressure-resistant PTC heating block, comprising a plurality of heat dissipation bars and a PTC heating block arranged between the heat dissipation bars, characterized in that: The heat dissipation strip is composed of a heat dissipation aluminum strip and a heat conductive aluminum strip. The heat conductive aluminum strip is installed with a heat dissipation aluminum strip on at least one side. A connecting edge is wrapped around the heat dissipation aluminum strip. A PTC heating block is glued and fixed on the connecting edge. The heat dissipation aluminum strip is composed of a plurality of aluminum strips with a "J"-shaped structure. The bottoms of two adjacent aluminum strips with a "J"-shaped structure are connected to form a corrugated structure, and a parallel fitting bottom surface is formed at the bottom connection, which is used to fit and fix on the fixed edge. The upper surface of the "J"-shaped structure is glued to the heat conductive aluminum strip.

2. The high-pressure-resistant PTC heating block according to claim 1 is characterized in that: The two side walls of the aluminum strip of the "X" shape structure are respectively provided with a plurality of rectangular notches and connecting surfaces, which are cross-arranged and connected with the notches and connecting surfaces on the adjacent aluminum strip block on the other side to form a concave and convex heat dissipation duct with a hollow interior.

3. The high-pressure PTC heating block according to claim 2 is characterized in that: The rectangular notches and connecting surfaces on the two adjacent aluminum strips are arranged in the same direction, so as to form a regular convex-concave structure air duct.

4. The high-pressure PTC heating block according to claim 2 is characterized in that: The rectangular notches and connecting surfaces on the two adjacent aluminum bars are arranged in a mirror-like manner. When the two protruding rectangles are relative to each other, a certain gap is left in the middle to form a small air duct. The two concave rectangles are relative to each other to form an air storage chamber. The gaps and the air storage chambers are arranged alternately so that hot air can be discharged evenly from the air storage chamber.

5. The high-pressure PTC heating block according to claim 1 is characterized in that: The ends of both sides of the connecting edge are provided with edging, which wraps the entire heat dissipation aluminum strip. The ends of the edging are close to the heat conductive aluminum strip, and a certain gap is left between the ends and the heat conductive aluminum strip for heat dissipation.

6. The high-pressure-resistant PTC heating block according to claim 5 is characterized in that: A protruding connector is provided at one end of one side of the heat-conducting aluminum strip, a plug connector is sleeved on the connector and fixed by screws, a plug sheet is provided at the end of the plug connector away from the connector, and a circular connecting through hole is provided on the plug sheet.

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