PTC reset temperature controller

Abstract

The utility model provides a kind of PTC reset temperature controller, including the fixed contact part, movable contact part, bimetallic strip and insulating rod in the shell inside, fixed contact part and movable contact part are connected first wiring end and second wiring end respectively, fixed contact part and movable contact part contact, the bimetallic strip is contacted with temperature sensing end on shell, the both ends of insulating rod are corresponding movable contact part and bimetallic strip respectively, the bimetallic strip can be heated deformation to push insulating rod to make fixed contact part and movable contact part separate, first PTC pin is equipped on movable contact part, second PTC pin is equipped on fixed contact part, PTC heating part that can heat bimetallic strip is equipped in shell, first conducting interface and second conducting interface are equipped on PTC heating part, first PTC pin has the first conducting part with first conducting interface butt joint, second PTC pin has the second conducting part with second conducting interface butt joint. PTC reset temperature controller with above-mentioned structure is favorable to improve production assembly efficiency.

Description

Technical Field

[0001] This utility model relates to the field of temperature controllers, and more particularly to a PTC reset temperature controller. Background Technology

[0002] Currently, there are many types of thermostats on the market, mainly used in electrical appliances with heating functions to control temperature and prevent dry burning. PTC reset thermostats on the market maintain a closed circuit and the internal PTC is in an on state when the temperature of the measured object does not exceed the preset value. Because the PTC has high resistance, only a small amount of current flows even when energized, so no significant heat is generated. However, when the temperature of the measured object exceeds the preset value, the PTC reset thermostat cuts off the power. At this time, all current can only flow through the PTC, so the PTC starts to heat up and continuously heats the bimetallic strip, ensuring that the bimetallic strip is at a high temperature. Only by cutting off the power and allowing the bimetallic strip to cool down and recover its deformation will the PTC reset thermostat reclose the circuit. However, the internal PTC conductive structure design of current PTC reset thermostats on the market is relatively complex, resulting in slow production and assembly efficiency.

[0003] Therefore, it is necessary to make further improvements. Utility Model Content

[0004] To address the aforementioned problems, this utility model proposes a PTC reset temperature controller, which has advantages such as a reasonable internal structure design and ease of assembly.

[0005] This utility model proposes a PTC reset temperature controller, which includes a fixed contact, a moving contact, a bimetallic strip, and an insulating rod disposed inside a housing. The fixed contact and the moving contact are respectively connected to a first terminal and a second terminal. The fixed contact is in contact with the moving contact. The bimetallic strip is in contact with a temperature sensing end on the housing. The two ends of the insulating rod correspond to the moving contact and the bimetallic strip, respectively. The bimetallic strip can be deformed by heat to push the insulating rod to separate the fixed contact and the moving contact. The moving contact is provided with a first PTC pin, and the fixed contact is provided with a second PTC pin. A PTC heating element that can heat the bimetallic strip is disposed inside the housing. The PTC heating element is provided with a first conductive interface and a second conductive interface. The first PTC pin has a first conductive part that connects to the first conductive interface, and the second PTC pin has a second conductive part that connects to the second conductive interface.

[0006] In one or more embodiments, the first conductive part is a conductive pillar, the insertion end of the conductive pillar is provided with a guiding slope, and the structure of the second conductive part is the same as the structure of the first conductive part.

[0007] In one or more embodiments, a ceramic component is provided inside the housing, and a mounting cavity is formed between the ceramic component and the temperature sensing end. The bimetallic strip is placed in the mounting cavity. The ceramic component has a clearance opening for the insulating rod to pass through. The PTC heating element contacts the ceramic component for heat conduction.

[0008] In one or more embodiments, the ceramic component has a cavity, and the PTC heating element is sized to match the cavity and is fitted into the cavity.

[0009] In one or more embodiments, the moving contact includes a first conductive post, a spring contact, and a first protrusion. The two ends of the spring contact are respectively connected to the first conductive post and the first protrusion. The first PTC pin and the second terminal are connected to the first conductive post. The insulating rod corresponds to the spring contact. The fixed contact includes a second conductive post, a conductive support, and a second protrusion. The two ends of the conductive support are respectively connected to the second conductive post and the second protrusion. The second protrusion is connected to the first protrusion. The second PTC pin and the first terminal are connected to the second conductive post.

[0010] The beneficial effects of this utility model are as follows: the heating element uses a first PTC pin and a second PTC pin to complete the conductive connection in a plug-in manner, which helps to improve production and assembly efficiency; moreover, the heating element is connected to the ceramic component in an embedded manner, which ensures that the heat transfer of PTC heating is rapid. Attached Figure Description

[0011] Figure 1 This is a cross-sectional view of the PTC reset temperature controller of this utility model;

[0012] Figure 2 This is an exploded view of the PTC reset temperature controller of this utility model;

[0013] Figure 3 for Figure 2 A schematic diagram of the structure from another angle. Detailed Implementation

[0014] To enhance understanding of this utility model, the present utility model will be further described in detail below with reference to the embodiments and accompanying drawings. These embodiments are only used to explain the present utility model and do not constitute a limitation on the scope of protection of the present utility model.

[0015] Please refer to the appendix. Figure 1-3This utility model provides a PTC reset temperature controller, which includes a fixed contact, a moving contact, a bimetallic strip 2, and an insulating rod 3 disposed inside a housing 1. The fixed contact and the moving contact are respectively connected to a first terminal 4 and a second terminal 5. The fixed contact is in contact with the moving contact. The bimetallic strip 2 is in contact with a temperature sensing end 6 on the housing. The two ends of the insulating rod 3 correspond to the moving contact and the bimetallic strip 2, respectively. The bimetallic strip 2 can be deformed by heat to push the insulating rod 3 to separate the fixed contact from the moving contact. The moving contact is provided with a first PTC pin 7, and the fixed contact is provided with a second PTC pin 7. The housing 1 contains a PTC heating element 9 that can heat the bimetallic strip 2. The PTC heating element 9 has a first conductive interface 91 and a second conductive interface 92. The first PTC pin 7 has a first conductive part 71 that mates with the first conductive interface 91, and the second PTC pin 8 has a second conductive part 81 that mates with the second conductive interface 92. This PTC reset temperature controller completes the conductive connection of the PTC heating element by plugging it in, which can complete the quick docking and installation of the temperature controller with a compact internal structure, thereby improving the production efficiency of the product.

[0016] The first conductive part 71 is a conductive column, and the insertion end of the conductive column is provided with a guide slope. The guide slope can improve the docking work between the conductive part and the conductive interface, and complete the quick alignment connection. The structure of the second conductive part 81 is the same as that of the first conductive part 71.

[0017] The housing 1 is provided with a ceramic component 10, and a mounting cavity 11 is formed between the ceramic component and the temperature sensing end 6. The bimetallic strip 2 is placed in the mounting cavity. The ceramic component 10 has a clearance opening 101 for the insulating rod 3 to pass through. The PTC heating part 9 is in contact with the ceramic component for heat conduction. The ceramic component has the advantages of good thermal conductivity and insulation, and can quickly conduct the heat of the PTC heating part to the bimetallic strip.

[0018] The ceramic component 10 has a cavity 102. The size of the PTC heating element 9 matches the cavity and is embedded in the cavity. Embedding the PTC heating element on the ceramic component can further improve the installation efficiency of the PTC heating element.

[0019] Specifically, the moving contact in this embodiment includes a first conductive post 11, a spring piece 12, and a first protrusion 13. The two ends of the spring piece 12 are respectively connected to the first conductive post 11 and the first protrusion 13. The first PTC pin 7 and the second terminal 5 are connected to the first conductive post 11. The insulating rod 3 corresponds to the spring piece 12. The fixed contact includes a second conductive post 14, a conductive support 15, and a second protrusion 16. The two ends of the conductive support 15 are respectively connected to the second conductive post 14 and the second protrusion 16. The second protrusion 16 is connected to the first protrusion 13. The second PTC pin 8 and the first terminal 4 are connected to the second conductive post 14.

[0020] The above description is only a preferred embodiment of the present utility model. The protection scope of the present utility model is not limited to the above embodiments. Any equivalent modifications or changes made by those skilled in the art based on the content disclosed in the present utility model should be included in the protection scope recorded in the claims.

Claims

1. A PTC reset temperature controller, characterized in that: The device includes a fixed contact, a movable contact, a bimetallic strip (2), and an insulating rod (3) disposed inside the housing (1). The fixed contact and the movable contact are respectively connected to a first terminal (4) and a second terminal (5). The fixed contact is in contact with the movable contact. The bimetallic strip (2) is in contact with a temperature-sensing end (6) on the housing. The two ends of the insulating rod (3) correspond to the movable contact and the bimetallic strip (2) respectively. The bimetallic strip (2) can be deformed by heat to push the insulating rod (3) to separate the fixed contact from the movable contact. The movable contact is provided with a first The PTC pin (7) has a second PTC pin (8) on the fixed contact portion. The housing (1) has a PTC heating part (9) that can heat the bimetallic strip (2). The PTC heating part (9) has a first conductive interface (91) and a second conductive interface (92). The first PTC pin (7) has a first conductive part (71) that is connected to the first conductive interface (91), and the second PTC pin (8) has a second conductive part (81) that is connected to the second conductive interface (92).

2. The PTC reset temperature controller according to claim 1, characterized in that: The first conductive part (71) is a conductive pillar, and the insertion end of the conductive pillar is provided with a guide slope. The structure of the second conductive part (81) is the same as that of the first conductive part (71).

3. A PTC reset temperature controller according to claim 1, characterized in that: The housing (1) is provided with a ceramic component (10), and an installation cavity (11) is formed between the ceramic component and the temperature sensing end (6). The bimetallic strip (2) is placed in the installation cavity. The ceramic component (10) has a clearance opening (101) for the insulating rod (3) to pass through. The PTC heating part (9) is in contact with the ceramic component for heat conduction.

4. A PTC reset temperature controller according to claim 3, characterized in that: The ceramic component (10) has a cavity (102), and the size of the PTC heating element (9) matches the cavity and is fitted into the cavity.

5. A PTC reset temperature controller according to claim 1, characterized in that: The moving contact includes a first conductive post (11), a spring (12), and a first protrusion (13). The two ends of the spring (12) are connected to the first conductive post (11) and the first protrusion (13), respectively. The first PTC pin (7) and the second terminal (5) are connected to the first conductive post (11), and the insulating rod (3) corresponds to the spring (12). The fixed contact includes a second conductive post (14), a conductive support (15), and a second protrusion (16). The two ends of the conductive support (15) are connected to the second conductive post (14) and the second protrusion (16), respectively. The second protrusion (16) is connected to the first protrusion (13), and the second PTC pin (8) and the first terminal (4) are connected to the second conductive post (14).

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