Air-heating PTC (Positive Temperature Coefficient) heater

Abstract

The utility model discloses an air-heating PTC (Positive Temperature Coefficient) heater. The device comprises a cover plate, a shell and a heating assembly which is arranged in the shell and is provided with a plurality of heating cores, a plurality of protruding blocks are arranged in the shell side by side at intervals, and the interior of the shell is divided into an upper wiring cavity and a lower heating cavity. A sealing ring is arranged on each heating core and wraps the upper part of the heating core in a sealing manner; the heating assembly is fixed in the shell in the mode that the sealing ring is embedded into the gap of the protruding block, the sealing ring and the protruding block form a sealing relation, and the electrode part of the heating core is located in the wiring cavity. The sealing structure has the advantages that a single sealing gasket in the prior art is changed into a plurality of sealing rings, and the sealing rings are matched with sealant for sealing, so that the material size is reduced, the sealing process is optimized, the material cost and the reworking cost generated after sealant leakage are greatly reduced, and the production efficiency is improved; glue grooves are formed in the upper portion and the lower portion of the sealing ring, so that the contact area between the sealant and the heating assembly is larger when the sealant flows in, and the sealing performance is further enhanced.

Description

Technical Field

[0001] This utility model relates to a PTC heater, specifically a wind-heated PTC heater. Background Technology

[0002] Existing PTC heaters for air-cooled vehicles typically include components such as a PTC heating element, aluminum heat sink, controller, and plastic housing. Their structure requires sealing, with the electrical components completely sealed using thermally conductive silicone to prevent condensate from the evaporator from flowing onto the PTC heater and causing insulation problems, which could lead to vehicle malfunctions. Previous products used a single sealing ring, but this sealing process is complex, prone to uneven sealing, and poses a risk of leakage. Rework costs are also high after leakage occurs. Summary of the Invention

[0003] The technical problem to be solved by this utility model is to provide a PTC heater with good sealing performance and low cost.

[0004] To solve the above-mentioned technical problems, the present invention provides a wind-heated PTC heater, comprising a cover plate, a housing, and a heating assembly with multiple heating cores installed in the housing; multiple protrusions are arranged side by side at intervals in the housing, dividing the interior of the housing into an upper wiring cavity and a lower heating cavity; each heating core is provided with a sealing ring, which seals and covers the upper part of the heating core; the heating assembly is fixed in the housing by means of the sealing ring being embedded in the gap between the protrusions, and the sealing ring and the protrusions form a sealing relationship, placing the electrode part of the heating core in the wiring cavity.

[0005] The wiring cavity is filled with sealant.

[0006] The sealing ring has grooves at the top and bottom to increase the contact area between the sealant and the heating component, and housing mounting grooves at the left and right, so that the gap shape between two adjacent housing mounting grooves matches the protrusion; the sealing ring and the protrusion have communicating cover plate limiting grooves, and the cover plate is provided with cover plate limiting ribs that match the shape of the cover plate limiting grooves.

[0007] The heating assembly includes multiple heating cores and heat dissipation fins arranged alternately side by side. The heating cores have electrode strips inside and end caps at the top. The end caps have two through holes for the positive and negative electrodes of the electrode strips to extend out, respectively.

[0008] The positive and negative terminals of the multiple electrode strips are connected through a busbar.

[0009] The heat dissipation fins are made of aluminum.

[0010] The cover plate and the housing are made of plastic, and the sealing ring is made of silicone.

[0011] The advantages of this invention are: it replaces the traditional use of a single sealing gasket with the use of multiple sealing rings, which are then combined with sealant to achieve a seal. This reduces the material size and optimizes the sealing process, thereby significantly reducing material costs and rework costs caused by sealant leakage, and improving production efficiency. The sealing rings have grooves on the top and bottom, which increases the contact area between the sealant and the heating component when it flows in, further enhancing the sealing performance. Attached Figure Description

[0012] Figure 1 This is an exploded view of the present invention;

[0013] Figure 2 This is a perspective view of the present invention after the cover plate has been removed;

[0014] Figure 3 for Figure 2 A magnified view of a portion of the image;

[0015] Figure 4 This is a perspective view of the sealing ring of this utility model;

[0016] Figure 5 This is a perspective view of the present invention after the cover plate has been removed and sealant has been poured in;

[0017] Figure 6 This is a perspective view of the cover plate of this utility model;

[0018] Figure 7 This is an exploded view of the heating component of this utility model. Detailed Implementation

[0019] The present invention's air-heated PTC heater will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0020] As shown in the figure, the PTC heater of this utility model includes a plastic cover plate 1, a housing 2, and a heating assembly 3 installed in the housing 2. The heating assembly 3 includes multiple heating cores 11 arranged alternately in parallel and aluminum heat dissipation fins 12. The heating core 11 includes an aluminum tube and an electrode strip 13 covered with an insulating film passing through the inside of the aluminum tube. The upper end of the aluminum tube is provided with a cap 14, which has two through holes for the positive and negative electrodes of the electrode strip 13 to extend out. The positive and negative electrodes of the multiple electrode strips 13 are respectively welded to corresponding busbars 15 to form a current collector. A high-voltage wire harness is connected to the busbars 15. Multiple protrusions 8 are arranged alternately in parallel in the housing 2, dividing its interior into an upper wiring cavity and a lower heating cavity. The electrode strips 13, caps 14, and busbars 15 are located in the wiring cavity, and the heating cores 11 and heat dissipation fins 12 are located in the heating cavity.

[0021] Each aluminum tube in the heating assembly 3 has a silicone sealing ring 5 fitted onto its upper end. The sealing ring 5 has housing mounting grooves 7 on its left and right sides, creating gaps between adjacent mounting grooves 7 that match the shape of the protrusions 8. The heating assembly 3 is installed and fixed in the housing 2 by the sealing ring 5 fitting into the gaps between adjacent protrusions 8. After the heating assembly 3 is installed, sealant 4 is poured into the wiring cavity. The sealing ring 5 also has grooves 6 on its upper and lower sides for the sealant 4 to flow into, increasing the contact area between the sealant 4 and the heating assembly 3, thereby further improving the overall sealing performance of the PTC heater.

[0022] The sealing ring 5 and the protrusion 8 have a connecting cover plate limiting groove 9, and the cover plate 1 is provided with a cover plate limiting rib 10 that matches the shape of the cover plate limiting groove 9, so as to achieve limiting and sealing when the cover plate 1 is finally installed.

[0023] Of course, the above description is not intended to limit the present invention, and the present invention is not limited to the examples given above. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of the present invention should also fall within the protection scope of the present invention.

Claims

1. A PTC heater for air heating, characterized in that: The device includes a cover plate (1), a housing (2), and a heating assembly (3) with multiple heating cores (11) installed in the housing (2). Multiple protrusions (8) are arranged side by side in the housing (2), dividing the interior of the housing (2) into an upper wiring cavity and a lower heating cavity. Each heating core (11) is provided with a sealing ring (5), which seals and covers the upper part of the heating core (11). The heating assembly (3) is fixed in the housing (2) by the sealing ring (5) being embedded in the gap of the protrusions (8). The sealing ring (5) and the protrusions (8) form a sealing relationship, and the electrode part of the heating core (11) is located in the wiring cavity.

2. The PTC heater for air heating according to claim 1, characterized in that: The wiring cavity is filled with sealant (4).

3. The air-heated PTC heater according to claim 2, characterized in that: The sealing ring (5) has grooves (6) at the top and bottom to increase the contact area between the sealant (4) and the heating component (3), and housing mounting grooves (7) on the left and right sides, so that the gap shape of two adjacent housing mounting grooves (7) matches the protrusion (8); the sealing ring (5) and the protrusion (8) have communicating cover plate limiting grooves (9), and the cover plate (1) is provided with cover plate limiting ribs (10) that match the shape of the cover plate limiting grooves (9).

4. The air-cooled PTC heater according to claim 1, characterized in that: The heating assembly (3) includes multiple heating cores (11) arranged side by side and alternatingly and heat dissipation fins (12). The heating core (11) has an electrode strip (13) inside and a cap (14) at the upper end. The cap (14) has two through holes for the positive and negative electrodes of the electrode strip (13) to extend out respectively.

5. The air-cooled PTC heater according to claim 4, characterized in that: The positive and negative poles of the multiple electrode strips (13) are connected through a busbar (15).

6. The air-heated PTC heater according to claim 4, characterized in that: The heat dissipation fins (12) are made of aluminum.

7. The air-cooled PTC heater according to any one of claims 1-6, characterized in that: The cover plate (1) and the housing (2) are made of plastic, and the sealing ring (5) is made of silicone.

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