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CN-121812293-B - Temperature-control thick film resistor and production process thereof

CN121812293BCN 121812293 BCN121812293 BCN 121812293BCN-121812293-B

Abstract

The invention discloses a temperature-control thick film resistor and a production process thereof in the technical field of thick film resistor electric auxiliary heating, and aims to solve the problem that heating power of a thick film resistor product in the prior art is not suitable for use environments in the use process. The solar cell comprises a substrate, wherein a working resistor film layer and an auxiliary resistor film layer are arranged on the substrate, a plurality of first switching terminals are arranged on the substrate and used for being connected with the working resistor film layer, a plurality of second switching terminals are arranged on the substrate and used for being communicated with the auxiliary resistor film layer, a positive circuit and a negative circuit which are mutually separated are also arranged on the substrate, a plurality of parallel branches are connected between the positive circuit and the negative circuit, and a resistor and a temperature control switch are connected in series on each parallel branch; the invention is used for automatically controlling different heating powers in complex environments, so that the temperature stability of the thick film resistor is kept as much as possible in different environments, the influence of the temperature on the performance of the thick film resistor is reduced, and the service life and the use effect are ensured.

Inventors

  • LI JUNJIE

Assignees

  • 昆山福烨电子有限公司

Dates

Publication Date
20260512
Application Date
20260311

Claims (10)

  1. 1. The utility model provides a thick film resistor of accuse temperature, its characterized in that, including base plate (1), be equipped with work resistance rete (2) and supplementary thermal resistance rete (4) on base plate (1), be equipped with a plurality of first switching terminals (3) on base plate (1) and be used for connecting work resistance rete (2) to be equipped with a plurality of second switching terminals (9) and be used for the intercommunication to assist thermal resistance rete (4), still be equipped with positive circuit (5) and negative pole circuit (6) of mutual partition on base plate (1), be connected between positive circuit (5) and negative pole circuit (6) and be provided with a plurality of parallel branch (25), every all concatenate on parallel branch (25) and be provided with resistor (7) and temperature control switch (8), positive circuit (5) or negative pole circuit (6) are through supplementary thermal resistance rete (4) and second switching terminal (9) electric connection.
  2. 2. The thick film resistor according to claim 1, wherein the auxiliary thermal resistor film layers (4) are disposed on the front side and the back side of the substrate (1), grouting holes (10) are formed in the substrate (1) and penetrate through the auxiliary thermal resistor film layers (4) on the front side and the back side of the substrate (1), and the auxiliary thermal resistor film layers (4) on the front side and the back side are electrically connected through conductive materials filled in the grouting holes (10).
  3. 3. The temperature-control thick film resistor according to claim 2, wherein the temperature-control switch (8) comprises a mounting block (801) and a contact block (802), a contact piece (803) is mounted on the mounting block (801) and used for being contacted with the contact block (802), the contact piece (803) is formed by overlapping plates with two different thermal expansion coefficients, and the mounting block (801) and the contact block (802) are located at opposite back positions of the working resistor film layer (2) on the substrate (1).
  4. 4. A temperature-controlled thick film resistor according to claim 3, wherein the substrate (1) is further provided with a main control temperature switch (11), the main control temperature switch (11) and the working resistor film layer (2) are arranged in series, and the main control temperature switch (11) is arranged at the back position of the substrate (1) opposite to the working resistor film layer (2).
  5. 5. A temperature-control thick film resistor according to claim 3, characterized in that the substrate (1) is further provided with a packaging shade (12), the packaging shade (12) is provided with a plurality of adjusting holes, the position of each adjusting hole corresponds to the position of a contact piece (803), the back surface of the packaging shade (12) is provided with a sliding groove (13), a sliding piece (14) is arranged in the sliding groove (13) in a sliding manner, teeth are arranged on one side of the sliding piece (14), an adjusting gear (15) which can be meshed with the corresponding teeth is arranged on one side of each sliding piece (14) on the substrate (1), a contact (16) which can move in the adjusting holes is arranged on one side of each sliding piece (14), and the contact (16) can be abutted to the surface position of the corresponding contact piece (803).
  6. 6. The thick film resistor according to claim 5, wherein an insulating block for supporting a contact piece (803) is arranged between every two adjacent mounting blocks (801) and a contact block (802), the contact (16) can press the contact piece (803) against the insulating block, a scale groove (17) is arranged along the sliding direction of the sliding sheet (14), and a temperature trigger mark is marked on the scale groove (17).
  7. 7. A process for producing a temperature-controlled thick film resistor according to any one of claims 1 to 6, characterized in that the process comprises the steps of: preparing a substrate (1), and sequentially printing a conductor, a resistor paste and a protective layer paste on the front side and the back side of the substrate (1), wherein the printed conductor comprises a first switching terminal (3), a second switching terminal (9) and a plurality of groups of adjacent welding terminals, and the surface of the substrate (1) is dried at a low temperature after each printing step is finished; sintering the substrate (1) and forming a compact resistor film on the front and back surfaces of the substrate (1); Removing unnecessary areas of the resistor film by laser, forming a working resistor film layer (2) on the surface of the substrate (1), and forming a subsidiary resistor film layer (4) on at least one side of the substrate (1) away from the working resistor film layer (2); Respectively welding a mounting block (801) with a contact piece (803) and a contact block (802) on each group of adjacent welding terminals, and enabling the welding position to meet the requirement that the contact piece (803) can normally abut against the contact block (802); and after the parallel branch (25) where the temperature control switches (8) are positioned is connected with the corresponding resistor (7), packaging the product.
  8. 8. The process for producing the temperature-controlled thick film resistor according to claim 7, wherein the printing of the positive electrode circuit (5), the negative electrode circuit (6) and the parallel branch (25) is completed simultaneously when the conductor is printed, the setting position of the resistor (7) is left when the parallel branch (25) is printed, the resistor paste is printed at the required position of the resistor (7) and is connected with the temperature-controlled switch (8) of the parallel branch (25) in series when the resistor paste is printed, and the actual resistance value of the resistor (7) is generated by trimming the resistor film in the area by laser.
  9. 9. The process for producing the temperature-controlled thick film resistor according to claim 7, wherein the printing of the positive electrode circuit (5), the negative electrode circuit (6) and the parallel branch (25) is completed simultaneously when the conductor is printed, the resistor (7) is arranged at a position reserved when the parallel branch (25) is printed, and the resistor (7) is welded at the position reserved for the resistor (7).
  10. 10. The process according to claim 9, wherein the resistor (7) is a slide resistor, and the regulator is mounted at the same time when the resistor is packaged by the packaging shade (12).

Description

Temperature-control thick film resistor and production process thereof Technical Field The invention relates to a temperature-control thick film resistor and a production process thereof, and belongs to the technical field of thick film resistor electric auxiliary heating. Background The thick film resistor is a resistor element formed by printing conductive paste (such as ruthenium oxide) on a ceramic substrate through screen printing and sintering at high temperature, and is widely applied to the fields of automobile electronics, industrial heating, household appliance control and the like due to the advantages of high temperature resistance, high power density, low cost, flexible design and the like. In actual operation of the thick film resistor, temperature is a key for influencing the working stability of the resistor, and a heating circuit is communicated by the temperature control switch when the temperature is too low in a traditional mode of adopting a single temperature control switch, so that rated heating power cannot meet the requirement of the working temperature in an extreme temperature environment, even if the temperature is still possibly too low due to continuous heating control temperature, the thick film resistor capable of adjusting the heating power in real time according to temperature change is needed to meet the stable use requirement in the environment. Disclosure of Invention The invention aims to overcome the defects in the prior art, and provides a temperature-control thick film resistor and a production process thereof, which are used for automatically controlling different heating powers in complex environments, so that the temperature stability of the thick film resistor is kept as much as possible in different environments, the influence of temperature on the performance of the thick film resistor is reduced, and the service life and the use effect are ensured. In order to achieve the above purpose, the invention is realized by adopting the following technical scheme: On the one hand, the temperature-control thick film resistor comprises a substrate, wherein a working resistor film layer and an auxiliary resistor film layer are arranged on the substrate, a plurality of first switching terminals are arranged on the substrate and used for being connected with the working resistor film layer, a plurality of second switching terminals are arranged on the substrate and used for being communicated with the auxiliary resistor film layer, a positive electrode circuit and a negative electrode circuit which are mutually separated are further arranged on the substrate, a plurality of parallel branches are connected between the positive electrode circuit and the negative electrode circuit, a resistor and a temperature control switch are connected in series on each parallel branch, and the positive electrode circuit or the negative electrode circuit is electrically connected with the second switching terminals through the auxiliary resistor film layer. Specifically, the auxiliary thermal resistance film layers are arranged on the front side and the back side of the substrate, grouting holes are formed in the substrate and penetrate through the auxiliary thermal resistance film layers on the front side and the back side of the substrate, and the auxiliary thermal resistance film layers on the front side and the back side are electrically connected through conductive materials filled in the grouting holes. Specifically, temperature detect switch includes installation piece and contact block, install the contact piece on the installation piece and be used for laminating the contact block contact, the contact piece is formed by the panel coincide of two kinds of different coefficient of thermal expansion, installation piece and contact block are located the relative back position of work resistance rete on the base plate. Specifically, the substrate is further provided with a main control temperature switch, the main control temperature switch and the working resistance film layer are arranged in series, and the main control temperature switch is arranged at the back position of the substrate opposite to the working resistance film layer. Specifically, still be equipped with the encapsulation shade on the base plate, be provided with a plurality of regulation hole and every regulation hole on the encapsulation shade the position all corresponds with the position of contact, the back position of encapsulation shade is provided with the spout, the slip is provided with the gleitbretter in the spout, one side of gleitbretter is provided with tooth, just be located one side of every gleitbretter on the base plate all be provided with can with the adjusting gear that corresponds tooth part meshing, every one side of gleitbretter all is provided with the contact that can move in the regulation hole, the contact can contradict in the surface position that corresponds the contact. Specifically, al