Ceramic thermistor with high heat resistance

Abstract

The utility model belongs to the technical field of thermistors, and particularly discloses a high-heat-resistance ceramic thermistor which comprises a resistor chip, pins, a protective ceramic layer and a heat dissipation assembly, the heat dissipation assembly is arranged at the top end of the resistor chip and comprises a heat conduction plate and heat dissipation fins, the heat conduction plate covers the top end face of the resistor chip, and the heat dissipation fins are arranged on the heat conduction plate. A plurality of heat dissipation fins are evenly arranged above the heat conduction plate at intervals, a protective ceramic layer is arranged on the outer side of the resistor chip and comprises an upper ceramic cup joint seat and a lower ceramic seat, and the upper ceramic cup joint seat and the lower ceramic seat are of a detachable structure. A step-shaped sleeving seat is arranged around the periphery and the upper end of the lower ceramic seat, an inserting groove is correspondingly formed in the lower end in the upper ceramic sleeving seat, pins are oppositely fixed to the left side and the right side of the lower end of the resistor chip and penetrate through the interior of the lower ceramic seat, and a supporting protection tube structure is arranged on the upper portion of the outer wall of each pin.

Description

Technical Field

[0001] The utility model relates to the technical field of thermistors, in particular to a ceramic thermistor with high heat resistance. Background Art

[0002] Thermistors are commonly used in the home appliance industry to sense temperature and feed the sensed temperature back to the control unit to achieve the purpose of temperature measurement or to achieve temperature control through a program. The role of thermistors is particularly important for electric heating appliances that increase the temperature by generating heat from electric heating elements, such as rice cookers, electric steamers, grills, and electric kettles. Thermistors are electronic components made using the property that the resistivity of thermistor materials changes with temperature, including positive temperature coefficient (PTC) thermistor elements whose resistance value increases with increasing temperature or negative temperature coefficient (NTC) thermistor elements whose resistance value decreases with increasing temperature.

[0003] In the prior art, there is a public technical solution for thermistors. The Chinese patent application number is CN202223146124.X, the application date is November 26, 2022, and the name of the invention is: an NTC thermistor. The application discloses an NTC thermistor, including an NTC resistor chip, a protective layer, a pin, a detachable protective ceramic layer structure, and a reinforced support protection tube structure. The outer wall of the NTC resistor chip is fixed with a protective layer. The setting of the ceramic seat, the first plug-in seat, the second plug-in seat, the first sealing ring, the second sealing ring, and the ceramic socket seat of the utility model is conducive to the socket setting of the ceramic seat and the ceramic socket seat during use, which is convenient for disassembling the ceramic socket seat during use, and is conducive to the maintenance and repair of the NTC resistor chip; the setting of the support rod, the reinforcement tube, the support protection tube, the inverted T-tube, and the pin is conducive to the retention and support of the pins through the reinforcement tube and the support protection tube during use, which is convenient for secondary utilization during use, and is conducive to achieving the purpose of saving resources;

[0004] The thermistor will generate a relatively high temperature during use. The above-mentioned application scheme has poor heat dissipation effect and heat resistance, which will affect the performance and service life of the thermistor. Therefore, improvements are made based on the above-mentioned application scheme. Utility Model Content

[0005] The utility model aims to provide a ceramic thermistor with high heat resistance to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a high heat-resistant ceramic thermistor, comprising a resistor chip, a pin, a protective ceramic layer and a heat dissipation component, a heat dissipation component is arranged on the top of the resistor chip, the heat dissipation component comprises a heat conducting plate and heat dissipation fins, the heat conducting plate covers the top surface of the resistor chip, a plurality of heat dissipation fins are evenly spaced above the heat conducting plate, a protective ceramic layer is arranged on the outside of the resistor chip, the protective ceramic layer comprises an upper ceramic socket and a lower ceramic seat, the upper ceramic socket and the lower ceramic seat are both detachable structures, a stepped socket is arranged around and around the upper end of the lower ceramic seat, a plug-in slot is correspondingly arranged at the lower end of the upper ceramic socket, pins are relatively fixed on the left and right sides of the lower end of the resistor chip, the pins pass through the interior of the lower ceramic seat, and a supporting protective tube is arranged on the upper part of the outer wall of the pins.

[0007] Preferably, the outer wall of the resistor chip is provided with a protective layer, the top protective layer is provided on the upper end of the heat conducting plate, and the protective layer is insulating glass.

[0008] Preferably, the upper ends of the heat dissipation fins penetrate and extend out of the top end surface of the upper ceramic socket, and the extended heat dissipation fins are spaced apart to form a heat dissipation channel.

[0009] Preferably, the lower end of the heat dissipation fin is bonded to the upper end surface of the heat conducting plate by means of heat conducting adhesive, and the heat conducting plate and the heat dissipation fin are made of metallic copper.

[0010] Preferably, a bending portion is provided at the lower end of the pin, and the bending portion is in an "S"-shaped structure.

[0011] Preferably, the outside of the pin is coated with a high temperature resistant coating by laser cladding.

[0012] Compared with the prior art, the utility model has the following beneficial effects: the utility model provides a ceramic thermistor with high heat resistance. By setting a heat dissipation component, the heat conductive plate absorbs the heat generated by the resistor chip, and then transfers the heat to the heat dissipation fins. The upper ends of the heat dissipation fins are exposed to the air for heat exchange. In addition, a bending portion is added to the pins at the lower ends to further improve the heat dissipation performance, slow down the aging of the resistor, improve the product stability, and optimize the performance and service life of the thermistor to meet the higher requirements and competitive needs of the market. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0014] Figure 2 It is a cross-sectional view of the utility model.

[0015] In the figure: 1. resistor chip; 2. protective layer; 3. pin; 31. bending part; 4. protective ceramic layer; 41. upper ceramic socket; 42. lower ceramic seat; 5. supporting protective tube; 6. heat dissipation component; 61. heat conduction plate; 62. heat dissipation fins; 63. heat dissipation channel. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0017] In the description of the present invention, it should be noted that the terms "vertical", "up", "down", "horizontal", etc. 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 present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0018] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0019] See also Figure 1-2The utility model provides a technical solution: a ceramic thermistor with high heat resistance, comprising a resistor chip 1, a pin 3, a protective ceramic layer 4 and a heat dissipation component 6, wherein a heat dissipation component 6 is arranged on the top of the resistor chip 1, and the heat dissipation component 6 comprises a heat conducting plate 61 and heat dissipation fins 62, wherein the heat conducting plate 61 covers the top surface of the resistor chip 1, and a plurality of heat dissipation fins 62 are evenly spaced above the heat conducting plate 61, and a protective ceramic layer 4 is arranged on the outside of the resistor chip 1, wherein the protective ceramic layer 4 comprises an upper ceramic socket 41 and a lower ceramic seat 42, wherein the upper ceramic socket 41 and the lower ceramic seat 42 are both detachable structures, and a stepped socket is arranged around and around the upper end of the lower ceramic seat 42, and a plug-in slot is correspondingly arranged at the lower end of the upper ceramic socket 41, and pins 3 are relatively fixed on the left and right sides of the lower end of the resistor chip 1, and the pins 3 pass through the interior of the lower ceramic seat 42, and a supporting protective tube 5 is arranged on the upper part of the outer wall of the pins 3.

[0020] Furthermore, a protective layer 2 is provided on the outer wall of the resistor chip 1 , and the top protective layer 2 is provided on the upper end of the heat conducting plate 61 , and the protective layer 2 is insulating glass.

[0021] Furthermore, the upper ends of the heat dissipation fins 62 penetrate and extend out of the top surface of the upper ceramic socket 41 , and the extended heat dissipation fins 62 are spaced apart to form heat dissipation channels 63 .

[0022] Furthermore, the lower end of the heat dissipation fin 62 is bonded to the upper end surface of the heat conducting plate 61 by heat conducting adhesive, and the heat conducting plate 61 and the heat dissipation fin 62 are made of metal copper.

[0023] Furthermore, a bending portion 31 is provided at the lower end of the pin 3, and the bending portion 31 is in an "S"-shaped structure, which is convenient for increasing heat dissipation and having fixed stability.

[0024] Furthermore, the exterior of the pin 3 is coated with a high temperature resistant coating by laser cladding.

[0025] Working principle: The utility model provides a ceramic thermistor with high heat resistance. By setting a heat dissipation component 6, a heat conducting plate 61 absorbs the heat generated by a resistor chip 1, and then transfers the heat to a heat dissipation fin 62. The upper end of the heat dissipation fin 62 is exposed to the air for heat exchange. In addition, a bending portion 31 is added to the pin 3 at the lower end to further improve the heat dissipation performance, slow down the aging of the resistor, improve the product stability, optimize the performance and service life of the thermistor, so as to meet the higher requirements and competitive needs of the market.

[0026] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A ceramic thermistor with high heat resistance, characterized in that: The invention comprises a resistor chip (1), pins (3), a protective ceramic layer (4) and a heat dissipation component (6), wherein the top of the resistor chip (1) is provided with a heat dissipation component (6), and the heat dissipation component (6) comprises a heat conduction plate (61) and heat dissipation fins (62), wherein the heat conduction plate (61) covers the top surface of the resistor chip (1), and a plurality of heat dissipation fins (62) are evenly spaced above the heat conduction plate (61), and the outer side of the resistor chip (1) is provided with a protective ceramic layer (4), and the protective ceramic layer (4) includes a heat conduction plate (61) and a heat dissipation fin (62). The invention comprises an upper ceramic socket (41) and a lower ceramic socket (42), wherein the upper ceramic socket (41) and the lower ceramic socket (42) are both detachable structures, and a stepped socket is arranged around the periphery and the upper end of the lower ceramic socket (42), and a plug-in slot is arranged correspondingly at the lower end of the upper ceramic socket (41), and pins (3) are relatively fixed on the left and right sides of the lower end of the resistor chip (1), and the pins (3) pass through the interior of the lower ceramic socket (42), and a supporting protective tube (5) is arranged on the upper part of the outer wall of the pins (3).

2. A ceramic thermistor with high heat resistance according to claim 1, characterized in that: The outer wall of the resistor chip (1) is provided with a protective layer (2), the top protective layer (2) is provided on the upper end of the heat conducting plate (61), and the protective layer (2) is insulating glass.

3. The ceramic thermistor with high heat resistance according to claim 1, characterized in that: The upper end of the heat dissipation fin (62) penetrates and extends out of the top end surface of the upper ceramic sleeve seat (41), and the extended heat dissipation fins (62) are spaced apart to form a heat dissipation channel (63).

4. The ceramic thermistor with high heat resistance according to claim 1, characterized in that: The lower end of the heat dissipation fin (62) is bonded to the upper end surface of the heat conduction plate (61) by means of heat conduction adhesive, and the heat conduction plate (61) and the heat dissipation fin (62) are made of metallic copper.

5. The ceramic thermistor with high heat resistance according to claim 1, characterized in that: A bent portion (31) is provided at the lower end of the pin (3), and the bent portion (31) is in an "S"-shaped structure.

6. The ceramic thermistor with high heat resistance according to claim 1, characterized in that: The outside of the pin (3) is coated with a high temperature resistant coating by laser cladding.

Images