Search

CN-224218536-U - Integrated PTC heater joint device

CN224218536UCN 224218536 UCN224218536 UCN 224218536UCN-224218536-U

Abstract

The utility model is suitable for the technical field of PTC heaters, and provides an integrated PTC heater joint device which comprises a shell, an insulating fixing seat, a duplex elastic contact mechanism, a conductive terminal, a radiating fin and other components, wherein the PTC heater can be accurately installed and stably operated through the accurate matching of the insulating fixing seat and the lubrication and heat conduction functions of a graphene modified silicone grease layer, the reliability of electrical and mechanical connection is enhanced through the pre-pressure of a beryllium copper alloy spring piece component and the multidirectional clamping force of a V-shaped clamping opening, the problems of poor contact and short circuit caused by assembly errors or vibration are reduced, the contact resistance is reduced through the silver layer plating of a conductive terminal and the design of a porous plug opening, the electric energy transmission efficiency is improved, and the heat generated when the PTC heater works can be quickly dissipated through a Z-shaped heat conduction path combined with a phase change heat conducting adhesive layer and the radiating fin, so that the stable operation of the PTC heater at a proper temperature is ensured, the service life of the device is prolonged, and the energy efficiency is improved.

Inventors

  • FU HUAN
  • Liao Zaosheng

Assignees

  • 扬州爱斯派电器有限公司

Dates

Publication Date
20260508
Application Date
20250610

Claims (8)

  1. 1. An integrated PTC heater joint apparatus, comprising: the shell body is provided with a plurality of grooves, the side wall of the inner cavity of the shell is provided with an annular heat-conducting silica gel layer, a positioning boss is arranged in the middle of the inner cavity, two ends of the shell penetrate through to form a plug-in cavity; The outer periphery of the insulating fixing seat is coated with an aluminum nitride ceramic ring, and the inner side end surface of the insulating fixing seat is provided with a positioning groove matched with the positioning boss; The duplex elastic contact mechanism comprises two groups of beryllium copper elastic sheet assemblies which are symmetrically arranged, each group of elastic sheet assemblies is formed by stacking a main elastic sheet and an auxiliary elastic sheet, a nano nickel-phosphorus alloy coating is coated on the surface layer by laser cladding, a pre-pressing chamber is formed between the two elastic sheets, and a corrugated diversion trench is arranged in the pre-pressing chamber along the axial direction; The conductive terminals are arranged in the pre-pressing cavity, and the two ends of the conductive terminals extend to the outside of the shell and are plated with silver layers; And the heat dissipation fins are welded at the tail ends of the electric conduction terminals, the phase-change heat conduction adhesive layers are filled in gaps of the heat dissipation fins, and the phase-change heat conduction adhesive layers and the heat conduction silica gel layers form Z-type heat conduction paths.
  2. 2. An integrated PTC heater joint assembly according to claim 1 wherein the free ends of the spring tabs are bent inwardly to form V-shaped notches, and wherein the inner walls of the notches are provided with anti-slip patterns along the circumferential direction.
  3. 3. An integrated PTC heater joint assembly according to claim 1 wherein the bottom of the pre-compression chamber is curved to form a surface contact with the PTC electrode boss.
  4. 4. An integrated PTC heater joint assembly according to claim 1 wherein the conductive terminals have a plurality of porous sockets at the end extending outside the housing, the plurality of porous sockets being arranged in a diamond array.
  5. 5. An integrated PTC heater joint device according to claim 1, further comprising an NTC temperature sensor embedded in the insulating holder by means of a laser.
  6. 6. An integrated PTC heater joint assembly according to claim 1 wherein the positioning boss has a diameter tolerance of + -0.03 mm at the large diameter end and an interference fit with the positioning slot of 0.05-0.1mm, and the mating surface is coated with a graphene-modified silicone grease layer.
  7. 7. An integrated PTC heater joint assembly according to claim 4 wherein the porous plug is hinged with a protective cover provided with an insulating sealing plug which mates with the porous plug.
  8. 8. An integrated PTC heater joint assembly according to claim 1 wherein the corrugated channels have a trapezoidal cross-sectional shape.

Description

Integrated PTC heater joint device Technical Field The utility model belongs to the technical field of PTC heaters, and particularly relates to an integrated PTC heater joint device. Background In the traditional PTC heater application scene, the joint device is used as a key component for connecting the PTC heater with an external circuit, and the installation precision and the operation stability are very important, however, the traditional joint device often lacks an effective positioning and fixing mechanism in the installation process, so that the installation position of the PTC heater in the joint device is inaccurate, and offset or shaking is easy to occur; In addition, in the working process of the PTC heater, due to the influence of factors such as self heating, external vibration and the like, the connecting parts in the joint device are easy to loose or wear, so that the problem of poor contact is further aggravated; The existing connector device has the problems of large contact resistance and high electric energy loss in the aspect of electric energy transmission, and because the contact area between the connecting parts is small and the number of contact points is small, larger resistance is generated when current passes, a large amount of electric energy is consumed, and the electric energy transmission efficiency is reduced; meanwhile, in the aspect of heat dissipation, the existing joint device often lacks an effective heat dissipation structure and materials, so that heat generated by the PTC heater during working cannot be timely dissipated, the temperature inside the joint device is too high, the working performance and the service life of the PTC heater can be influenced, and safety accidents can be caused by overheating. Disclosure of utility model The utility model provides an integrated PTC heater joint device, which aims to solve the problems of insufficient installation and operation stability, electric energy transmission efficiency and heat dissipation performance of the traditional PTC heater joint device. The utility model is realized in this way, an integrated PTC heater joint device comprises a shell, wherein the side wall of the inner cavity of the shell is provided with an annular heat-conducting silica gel layer, the middle part of the inner cavity is provided with a positioning boss, and two ends of the shell penetrate through to form a plug-in cavity; The outer periphery of the insulating fixing seat is coated with an aluminum nitride ceramic ring, and the inner side end surface of the insulating fixing seat is provided with a positioning groove matched with the positioning boss; The duplex elastic contact mechanism comprises two groups of beryllium copper elastic sheet assemblies which are symmetrically arranged, each group of elastic sheet assemblies is formed by stacking a main elastic sheet and an auxiliary elastic sheet, a nano nickel-phosphorus alloy coating is coated on the surface layer by laser cladding, a pre-pressing chamber is formed between the two elastic sheets, and a corrugated diversion trench is arranged in the pre-pressing chamber along the axial direction; The conductive terminals are arranged in the pre-pressing cavity, and the two ends of the conductive terminals extend to the outside of the shell and are plated with silver layers; And the heat dissipation fins are welded at the tail ends of the electric conduction terminals, the phase-change heat conduction adhesive layers are filled in gaps of the heat dissipation fins, and the phase-change heat conduction adhesive layers and the heat conduction silica gel layers form Z-type heat conduction paths. Preferably, the free end of the elastic sheet is bent inwards to form a V-shaped clamping opening, and the inner wall of the clamping opening is provided with anti-skid patterns along the circumferential direction. Preferably, the bottom of the pre-pressing cavity is an arc-shaped curved surface, and is in surface contact with the protruding part of the PTC electrode. Preferably, the end of the conductive terminal extending to the outer side of the shell is provided with a plurality of porous inserting ports, and the porous inserting ports are distributed in a diamond array. Preferably, the device further comprises an NTC temperature sensor, wherein the NTC temperature sensor is embedded into the insulating fixing seat through laser. Preferably, the diameter tolerance range of the large diameter end of the positioning boss is +/-0.03 mm, the interference fit amount with the positioning clamping groove is 0.05-0.1mm, and the matching surface is coated with the graphene modified silicone grease layer. Preferably, the porous interface is hinged with a protective cover, and an insulating sealing plug matched with the porous interface is arranged on the protective cover. Preferably, the corrugated diversion trench is arranged in a trapezoid shape in cross section. Compared with the prior art, the embodiment