一种汽车空调调速电阻的热保护装置

Abstract

本实用新型涉及调速电阻保护技术领域，公开了一种汽车空调调速电阻的热保护装置，包括铝合金底座和上盖，所述铝合金底座的内壁底侧固定连接有防热机构，所述铝合金底座的前后两端均滑动连接有安装机构，所述铝合金底座的内壁底侧左右两端均固定连接有束线机构，所述上盖的内部开设有多个通风孔，所述防热机构包括两个定位柱，两个所述定位柱的底侧固定连接在所述铝合金底座的内壁底侧，所述定位柱的顶部设置有固定组件。本实用新型中，通过导热硅脂的使用保证了基板与底座的紧密贴合，大幅降低热阻，当电阻丝温度升高时，热量可迅速传导至双金属片保护器，从而达到多重散热的效果，继而提高散热效率。

Claims

1. A thermal protection device for a speed regulating resistor of an automobile air conditioner, comprising an aluminum alloy base (1) and an upper cover (2), characterized in that: A heat-resistant mechanism (3) is fixedly connected to the bottom inner wall of the aluminum alloy base (1). An installation mechanism (4) is slidably connected to both the front and rear ends of the aluminum alloy base (1). A wire harness mechanism (5) is fixedly connected to both the left and right ends of the bottom inner wall of the aluminum alloy base (1). Multiple ventilation holes (6) are opened inside the top cover (2). The heat protection mechanism (3) includes two positioning posts (31). The bottom sides of the two positioning posts (31) are fixedly connected to the bottom side of the inner wall of the aluminum alloy base (1). The top of the positioning posts (31) is provided with a fixing component (32). A bimetallic strip protector (33) is fixedly connected to the adjacent side of the two fixing components (32). A silver electrode (36) is fixedly connected to the bottom side of the inner wall of the aluminum alloy base (1) by means of thermally conductive silicone grease. A nickel-chromium resistance wire (35) is fixedly connected to the top side of the silver electrode (36). An alumina substrate (34) is fixedly connected to the top side of the nickel-chromium resistance wire (35).

2. A thermal protection device for a speed regulating resistor of an automotive air conditioner according to claim 1, characterized in that: Both of the installation mechanisms (4) include a pressing plate (41). The exterior of the two pressing plates (41) is slidably connected to the interior of the front and rear ends of the aluminum alloy base (1). The interior of the pressing plate (41) is slidably connected to a limiting plate (42). The far ends of the two limiting plates (42) are fixedly connected to a spring (43). The exterior of the pressing plate (41) is slidably connected to a limiting frame (44). The near sides of the two pressing plates (41) are fixedly connected to a connecting block (45). The far sides of the two connecting blocks (45) are fixedly connected to two limiting blocks (46). The top sides of the two limiting frames (44) are fixedly connected to the bottom side of the upper cover (2).

3. A thermal protection device for a speed regulating resistor of an automotive air conditioner according to claim 1, characterized in that: Both of the wire harness mechanisms (5) include a base plate (51). The bottom sides of the two base plates (51) are fixedly connected to the bottom side of the inner wall of the aluminum alloy base (1). A cover plate (52) is rotatably connected to the front end of the base plate (51). An opening plate (54) is fixedly connected to the rear side of the cover plate (52). A rotating plate (55) is rotatably connected inside the opening plate (54). A concave plate (56) is rotatably connected to the rear end of the rotating plate (55). A support rod (57) is fixedly connected to the rear side of the base plate (51). A sliding ring (58) is slidably connected to the outside of the support rod (57). A fixed plate (59) is fixedly connected to the rear side of the support rod (57). A spring (510) is sleeved on the outside of the support rod (57).

4. A thermal protection device for a speed regulating resistor of an automotive air conditioner according to claim 3, characterized in that: The bottom side of the concave plate (56) is fixedly connected to the top side of the sliding ring (58), and multiple arc-shaped openings (53) are provided on the adjacent side of the bottom plate (51) and the cover plate (52).

5. The thermal protection device for a speed regulating resistor of an automobile air conditioner according to claim 1, characterized in that: Both of the fixing components (32) include a connecting plate (3201) which is internally slidably connected to the outside of the positioning post (31), and the connecting plate (3201) is internally bolted with rivets (3202).

6. A thermal protection device for a speed regulating resistor of an automotive air conditioner according to claim 5, characterized in that: The two connecting plates (3201) are fixedly connected to the left and right sides of the bimetallic strip protector (33) respectively on their adjacent sides, and the external thread of the rivet (3202) is connected to the inside of the positioning post (31).

7. A thermal protection device for a speed regulating resistor of an automotive air conditioner according to claim 2, characterized in that: The exterior of the two limiting plates (42) is fixedly connected to the interior of the front and rear ends of the aluminum alloy base (1), the far ends of the two springs (43) are fixedly connected to the far sides of the inner walls of the two limiting plates (42), the far sides of the two limiting frames (44) are fixedly connected to the front and rear sides of the inner walls of the aluminum alloy base (1), and the exterior of the two limiting blocks (46) is slidably connected to the interior of the limiting frames (44).

8. A thermal protection device for a speed regulating resistor of an automotive air conditioner according to claim 3, characterized in that: The front end of the second spring (510) is fixedly connected to the rear side of the base plate (51), and the rear end of the second spring (510) is fixedly connected to the front side of the sliding ring (58).

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