CN111385916B - Electric heater - Google Patents
Electric heater Download PDFInfo
- Publication number
- CN111385916B CN111385916B CN201811637121.1A CN201811637121A CN111385916B CN 111385916 B CN111385916 B CN 111385916B CN 201811637121 A CN201811637121 A CN 201811637121A CN 111385916 B CN111385916 B CN 111385916B
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- Prior art keywords
- electric heater
- switch element
- cover
- wall
- cover body
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B1/00—Details of electric heating devices
- H05B1/02—Automatic switching arrangements specially adapted to apparatus ; Control of heating devices
- H05B1/0202—Switches
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
- G01K1/14—Supports; Fastening devices; Arrangements for mounting thermometers in particular locations
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
- G01K1/16—Special arrangements for conducting heat from the object to the sensitive element
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/02—Details
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Thermally Actuated Switches (AREA)
- Control Of Resistance Heating (AREA)
Abstract
The invention provides an electric heater, which can be used in the field of vehicles and comprises a cover body, a temperature detection element and a fixing piece, wherein at least part of the temperature detection element is arranged in contact with a switch element; the abutting part abuts against the pressure bearing part of the temperature detection element, the pressure bearing part is arranged in contact with the outer wall of the switch element, or before the abutting part contacts the pressure bearing part, the sum of the thickness of the switch element and the thickness of the pressure bearing part is larger than the initial distance between the abutting part and the top wall part, the abutting part contacts with the pressure bearing part, and the sum of the thickness of the switch element and the thickness of the pressure bearing part is equal to the distance between the abutting part and the top wall part of the cover body, so that the electric heater can stably arrange the temperature detection element.
Description
[ technical field ] A
The invention relates to the field of vehicles, in particular to an electric heater.
[ background of the invention ]
The electric heater comprises a switch element, and the temperature detection element and the switch element can be fixed through threaded connection, so that the monitoring of the temperature detection element on the working temperature of the switch element is realized.
[ summary of the invention ]
The invention aims to provide an electric heater which can be stably provided with a temperature detection element.
The invention provides a technical scheme that: an electric heater comprises a base, a cover body and a switch element, wherein the base and the cover body are fixedly arranged, and the cover body and the switch element are limited or fixedly arranged; the electric heater also comprises a temperature detection element and a fixing piece, wherein at least part of the temperature detection element is arranged in contact with the switch element, the fixing piece comprises a body part and an abutting part arranged towards one side of the temperature detection element, the body part and the cover body are arranged in a limiting way or the body part and the cover body are fixedly arranged, the abutting part is abutted against a pressure bearing part of the temperature detection element, and the pressure bearing part is arranged in contact with the outer wall of the switch element.
According to the technical scheme, the body part of the fixing piece is limited or fixed with the cover body, and the abutting part of the fixing piece is abutted against the pressure bearing part of the temperature detection element, so that the pressure bearing part is pressed tightly, and the temperature detection element can be stably arranged.
The invention also provides another technical scheme: an electric heater comprises a base, a cover body and a switch element, wherein the base and the cover body are fixedly arranged, and the cover body and the switch element are limited or fixedly arranged; the electric heater also comprises a temperature detection element and a fixing piece, wherein at least part of the temperature detection element is arranged in contact with the switch element, the fixing piece comprises a body part and an abutting part, the body part and the cover body are arranged in a limiting way or fixedly arranged, the abutting part is arranged corresponding to a pressure-bearing part of the temperature detection element, before the abutting part contacts the pressure-bearing part, the sum of the thickness of the switch element and the thickness of the pressure-bearing part is larger than the initial distance between the abutting part and the top wall part of the cover body, the abutting part contacts the pressure-bearing part, and the sum of the thickness of the switch element and the thickness of the pressure-bearing part is equal to the distance between the abutting part and the top wall part of the cover body.
The body part of the fixing part is limited or fixed with the cover body, the abutting part is correspondingly provided with the pressure bearing part of the temperature detection element, the sum of the thickness of the switch element and the thickness of the pressure bearing part is larger than the initial distance between the abutting part and the top wall part of the cover body, the abutting part is in contact with the pressure bearing part, the abutting part and the temperature detection element mutually exert an acting force, so that the pressure bearing part is pressed and arranged, the temperature detection element is better limited or fixed relative to the cover body, and the temperature detection element can be stably arranged.
[ description of the drawings ]
FIG. 1 is a partial perspective view of an electric heater according to the present embodiment, showing a base, a cover, and a temperature detecting element;
FIG. 2 is an exploded perspective view of a portion of the components of the electric heater of FIG. 1;
FIG. 3 is a perspective view of a temperature sensing element of the electric heater of FIG. 1;
FIG. 4 is a perspective view of a fixture of the electric heater of FIG. 1;
FIG. 5 is a schematic perspective view of the electrically conductive components of the electric heater of FIG. 1;
FIG. 6 is a schematic view, partially in section, of the electric heater of FIG. 1;
FIG. 7 is a schematic view of the sum of the thickness of the switching element and the pressure receiving portion and the initial distance from the abutment portion;
FIG. 8 is a perspective view of the electric heater of FIG. 2 with some of the components assembled;
FIG. 9 is a schematic view of a temperature sensing element of another embodiment electric heater;
FIG. 10 is a schematic view of a fixture of the electric heater of FIG. 9;
FIG. 11 is a schematic view of the temperature sensing element and the fixing member shown in FIG. 9;
FIG. 12 is a schematic view of a further embodiment of a temperature sensing element;
fig. 13 is a schematic view of the temperature sensing element and corresponding fixture shown in fig. 12.
[ detailed description ] embodiments
The embodiment of the electric heater shown in fig. 1-8 can be applied to the field of vehicles, such as a thermal management system of a vehicle or a system part needing heating, and the technical solution provides an electric heater, which includes a base 1, a cover 2, and a switch element 3, wherein the base 1 and the cover 2 are fixedly arranged, and the cover 2 and the switch element 3 are limited or fixedly arranged; the electric heater also comprises a temperature detection element 4 and a fixing piece 5, wherein at least part of the temperature detection element 4 is arranged in contact with the switch element 3, the fixing piece 5 comprises a body part 51 and an abutting part 52 arranged towards one side of the temperature detection element 4, the body part 51 is arranged in a limiting way with the cover body 2 or the body part 51 is fixedly arranged with the cover body 2, the abutting part 52 abuts against a pressure bearing part 40 of the temperature detection element 4, and the pressure bearing part 40 is arranged in contact with the outer wall 30 of the switch element 3; it should be noted that the contact arrangement includes direct contact to transfer heat or transfer heat through a heat transfer medium; the body 51 of the fixing member 5 is fixed or restricted to the lid 2, and the abutting portion 52 of the fixing member 5 abuts against the pressure receiving portion 40 of the temperature detecting element 4, so that the pressure receiving portion 40 is pressed, the temperature detecting element 4 is fixed or restricted to the lid 2, and the temperature of the switching element 3 is easily detected, and when the temperature of the switching element 3 is higher than a set value or a desired temperature, the switching element is controlled to be turned off.
Still provide another technical scheme, the electric heater 100 includes the base 1, the body of the cover 2, the switching element 3, the base 1 is fixed with the body of the cover 2, the body of the cover 2 is limited or fixed with the switching element 3; the electric heater further comprises a temperature detection element 4 and a fixing piece 5, wherein at least part of the temperature detection element 4 is arranged in contact with the switch element 3, the fixing piece 5 comprises a body part 51 and an abutting part 52, the body part 51 is arranged in a limiting way with the cover body 2 or the body part 51 is fixedly arranged with the cover body 2, and the abutting part 52 is arranged corresponding to the pressure bearing part 40 of the temperature detection element 4. The sum H of the thickness of the switch element 3 and the thickness of the pressure-receiving portion is greater than the initial distance H between the abutting portion 52 and the top wall portion 21 of the cover body 2, and here, as shown in fig. 7, before the abutting portion 52 contacts the pressure-receiving portion, the initial distance between the abutting portion 52 and the top wall portion 21 is H, and the sum H of the thicknesses may be 5mm, 4mm, or 6mm, but may also be adjusted according to the thickness specification of the switch element, and the difference between the sum H of the thicknesses and the initial distance H is greater than 0 and smaller than the vertical distance between the abutting portion 52 and the main body portion 51, and specifically may be one of 0.05mm, 0.06mm, 1mm, 2mm, 3mm, 4mm, 5mm, and 6 mm. When the abutting portion 52 is in contact with the pressure receiving portion 40, the sum of the thickness of the switching element 3 and the thickness of the pressure receiving portion 40 is equal to the distance between the abutting portion 52 and the top wall portion 21; thus, the abutting part 52 is in contact with the pressure bearing part 40, the abutting part 52 and the temperature detection element 4 mutually exert acting force, so that the pressure bearing part 40 is pressed, the temperature detection element 4 is well limited or fixed relative to the cover body 2, and the temperature detection element can be stably arranged; further so arranged, it is also convenient to detect the temperature of the switching element, and when the temperature of the switching element 3 is higher than a set value or a desired temperature, the control part of the electric heater may control the switching element 3 to be turned off, and the specific control part may perform switching control through the switching circuit. The initial distance is a case where the abutting portion 52 is not deformed by pressure before contacting the pressure receiving portion 40, i.e., h as shown in fig. 7. The design requires that the abutting portion 52 of the fixing member 5 is located at a portion that is elastically deformable under pressure so that the fixing member 5 can press at least a part of the temperature detecting element 4.
The electric heater 100 further comprises a circuit board assembly 6, the switch element 3 comprises an insulating part 31 and a conductive part 32, a main body end part 321 of the conductive part is integrally fixed with the insulating part 31, a pin part 322 of the conductive part is positioned outside the insulating part, and the pin part 322 is fixedly connected with the circuit board assembly 6 in a welding way; the bearing part 40 is in contact with at least part of the switch element 3 to conduct heat, the outer shell 421 of the temperature sensing part 42 of the temperature detection element 4 is integrally formed with the bearing part 40, the temperature sensing part 42 of the temperature detection element 4 is at least arranged close to the outer wall of the switch element 3, wherein the switch element 3 is electrically connected with the circuit board assembly 6 through the pin part 322 of the conductive part, which is beneficial to realizing the switch control of the switch element 3, the outer shell of the temperature sensing part 42 and the bearing part are integrally formed to form a direct heat conduction structure, the insulation part 31 of the switch element 3 can be in contact with the bearing part 40 of the temperature detection element 4 to conduct heat, the temperature sensing part 42 and the insulation part 31 can be in good contact to conduct heat well, the temperature of the switch element 3 can be directly detected, and the detection performance of the temperature detection element 4 can be relatively improved.
Further, the insulating portion 31 includes a first wall portion 311 and a second wall portion 312, the first wall portion 311 and the second wall portion 312 are disposed opposite to each other, wherein the first wall portion 311 is in contact with the pressure-bearing portion 40, the first wall portion 311 is in contact with or close to the temperature sensing portion 42, the second wall portion 312 of the insulating portion is in contact with the top wall portion 21 of the cover 2, the first wall portion 311 is further in contact with the pressure-bearing portion 40 and is in contact with or close to the temperature sensing portion 42, the contact is further sufficient, and the temperature of the switching element 3 can be detected quickly; the electric heater further comprises heat conducting glue 210, the top wall part 21 of the cover body 2 comprises the heat conducting glue, the heat conducting glue 210 is attached to the second wall part 312 of the switch element 3, the base 1 and the cover body 2 are welded and fixed, the electric heater comprises a cavity between the base 1 and the cover body 2, the cover body 2 comprises a heat conducting convex part which is convexly arranged, the top wall part of the cover body 2 and the heat conducting convex part are oppositely arranged, the heat conducting convex part can absorb the heat at the top wall part, the heat conducting glue can better absorb the heat of the switch element 3 and conduct the heat to the cavity at the other side of the cover body 2, and the heat conductivity is relatively better; specifically, the temperature sensing part 42 is arranged in contact with or close to the first wall part 311, the temperature sensing part 42 comprises a temperature sensing core 422, an insulator 423 for covering the temperature sensing core, and a shell part 421 located at least partially outside the insulator, the shell part and the pressure bearing part are integrally formed, the shell part of the temperature sensing part and the pressure bearing part are integrally formed, heat can be transferred to the insulating part, and the insulating part can transfer the heat to the temperature sensing core; more specifically, the cover 2 includes a protruding heat conduction protrusion, and the top wall 21 of the cover 2 is opposite to the heat conduction protrusion, the heat conduction protrusion can absorb heat at the top wall 21, the heat conduction protrusion is favorable for heat transfer between the fluid in the cavity and the switching element 3, the heat generation amount of the switching element 3 is large, when the temperature of the switching element 3 is higher than that of the cover 2, the medium can transfer heat through the cover wall to absorb heat of the switching element 3, and the temperature of the switching element 3 can be relatively reduced.
Furthermore, the temperature detecting element 4 can adopt a temperature sensor, the temperature sensor comprises a temperature sensing core 422, an insulator 423 for coating the temperature sensing core, and a metal part 401 positioned outside at least part of the insulator, the metal part comprises a shell 421 and a bearing part 40, the shell 421 is not contacted with the abutting part 52, the temperature detecting element 4 further comprises a lead 424 or a contact pin electrically connected with the temperature sensing core, and the lead 424 or the contact pin is electrically connected with a control part of the electric heater; the outer shell includes a bent side wall integrally connected to the pressure receiving portion, and the insulator 423 is fitted in a gap between the temperature sensing core 422 and the outer shell 421 with resin; the metal part 401 has good heat conduction performance, relatively accurately reflects the temperature of the switch element 3, coats the insulating part with the temperature sensing core, avoids the temperature sensing core of the temperature sensing part from being stressed to influence the temperature detection performance, can reduce the contact between the temperature sensing core and the external environment, is electrically connected with the control part through the lead 424 or the contact pin, can transmit the collected temperature information to the control part, and the control part is positioned on the circuit board assembly.
Further, the body 51 is fixed to the cover 2, the electric heater includes a screw, the body 51 includes a metal base portion 50 located at two sides of the switching element 3, the metal base portion has through holes 501 at two ends, and a part of the screw is located at the through hole; the cover 2 includes a mounting boss 211, and another part of the screw is fixed to an internal thread of the mounting boss 211 by screwing; or, the body 51 and the cover are arranged in a limited manner, one of the body 51 and the cover includes a buckle, and the other includes a slot, and the buckle and the slot are locked and limited.
The fixing member 5 further includes an elastic arm 520, the connecting portion 521 of the elastic arm 520 is integrally connected to the main body 51, the cantilever portion of the elastic arm includes the abutting portion 52, the abutting portion is freely arranged relative to the main body, the free arrangement includes a cantilever structure, one end of the cantilever structure is fixed, and the other end of the cantilever structure is free; or, the fixing member 5 includes an elastic beam, the connecting portions at two ends of the elastic beam are integrally connected with the body portion, the elastic beam includes the abutting portion, the abutting portion is protruded from the connecting portions at two ends, the elastic beam includes a simply supported beam structure, and at least a middle portion of the simply supported beam has a certain elasticity; by fixing the main body 51 and the cover 2 and the elastic arm 520 of the fixing member 5 and the switch element 3, the portion of the temperature detecting element 4 that can be stressed, such as the pressing portion 40, can be clamped tightly to form a relatively stable abutting relationship, so as to reduce the possible displacement of the temperature detecting element 4, and the temperature detecting element can be in sufficiently close contact with the switch element 3 to directly detect the temperature of the switch element 3.
The electric heater comprises a conductive component 7, the conductive component comprises a conductive piece 71 and an insulating isolation part 72, the insulating isolation part 72 coats the main body connecting part of the conductive piece 71, a first plug pin 711 of the conductive piece is electrically connected with a switch circuit of the circuit board component 6, the switch circuit is electrically connected with the switch element 3, a second plug pin 712 of the conductive piece 71 is electrically connected with a heating pipe of the electric heater, and the conductive piece 71 of the conductive component can be electrically connected with the switch element 3 and the heating pipe so as to transmit a switch control signal provided by the circuit board component 6 to the heating pipe; the insulating isolation part 72 includes a peripheral wall part 721 corresponding to the switch element 3, the switch element 3 is at least partially located in a groove part 722 formed on the peripheral wall part, one of the peripheral wall part 721 and the metal part 401 includes a protrusion 43, the other includes a groove part 44, the protrusion 43 at least partially cooperates with the groove part 44 to form a limit structure, the limit cooperation between the peripheral wall part 721 provided on the insulating isolation part 72 and the temperature detection element 4 increases the circumferential limit of the temperature detection element 4, and reduces the displacement in the circumferential direction, for example, when the lead 424 or the contact pin is pulled by an external force, the circumferential limit can prevent the temperature detection element 4 from being rotated as much as possible.
Specifically, as shown in fig. 3, 4, and 5, two side walls of the peripheral wall portion are provided with protruding portions 43, two sides of the metal piece 401 are correspondingly provided with groove portions 44, and the protruding portions 43 and the groove portions 44 are in clearance fit, transition fit, or interference fit, so as to limit or fix the metal piece 401 and the peripheral wall portion; or, referring to fig. 9-11, in another embodiment, protruding portions 43 'protrude from two sides of the metal part 401, corresponding portions on two sides of the peripheral wall portion are provided with locking grooves 44', the protruding portions 43 'extend into the locking grooves 44', and the metal part 401 and the peripheral wall portion are limited or fixed by clearance fit, transition fit or interference fit; alternatively, referring to fig. 12 and 13, in another embodiment, a locking groove 44 "'is disposed on a side of the metal part 401 away from the temperature sensing portion, a protrusion 43"' is disposed at a corresponding portion of the peripheral wall portion, and the protrusion 43 "'is inserted into the locking groove 44"', so that the metal part 401 and the peripheral wall portion 721 are limited or fixed in a clearance fit, a transition fit or an interference fit.
In the present embodiment, the switching element 3 may be an Insulated Gate Bipolar Transistor (IGBT), which is hereinafter referred to as an IGBT, specifically, the metal member 401 is attached to the upper surface of the IGBT, and heat generated during operation can be stably transferred to the temperature sensing part 42 of the temperature sensor through the metal member 401, so that the contact area between the metal member 401 and the IGBT is larger, the heat generated during operation of the IGBT can be more reliably transferred, and the temperature detected by the temperature detection element 4 is more accurate. It is further possible to selectively detect the temperature of one or two or three or four of the electric heater switch elements 3, respectively. In the above embodiments, the metal member 401 of the temperature detecting element 4 is made of a metal material with a good heat conduction effect, such as copper or aluminum.
It should be noted that: although the present invention has been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that the present invention may be modified and equivalents may be substituted for those skilled in the art, and all technical solutions and modifications that do not depart from the spirit and scope of the present invention should be covered by the claims of the present invention.
Claims (10)
1. An electric heater, characterized by: the electric heater comprises a base, a cover body and a switch element, wherein the base and the cover body are fixedly arranged, and the cover body and the switch element are limited or fixedly arranged; the electric heater further comprises a temperature detection element and a fixing piece, at least part of the temperature detection element is arranged in contact with the switch element, the fixing piece comprises a body part and an abutting part arranged towards one side of the temperature detection element, the body part and the cover body are arranged in a limiting mode or the body part and the cover body are fixedly arranged, the abutting part abuts against a pressure bearing part of the temperature detection element, and the pressure bearing part is arranged in contact with the outer wall of the switch element.
2. An electric heater, characterized by: the electric heater comprises a base, a cover body and a switch element, wherein the base and the cover body are fixedly arranged, and the cover body and the switch element are limited or fixedly arranged; the electric heater also comprises a temperature detection element and a fixing piece, wherein at least part of the temperature detection element is arranged in contact with the switch element, the fixing piece comprises a body part and an abutting part, the body part and the cover body are arranged in a limiting way or are fixedly arranged, the abutting part is arranged corresponding to a pressure bearing part of the temperature detection element, before the abutting part contacts the pressure bearing part, the sum of the thickness of the switch element and the thickness of the pressure bearing part is larger than the initial distance between the abutting part and the top wall part of the cover body, the abutting part contacts the pressure bearing part, and the sum of the thickness of the switch element and the thickness of the pressure bearing part is equal to the distance between the abutting part and the top wall part of the cover body.
3. The electric heater according to claim 1 or 2, wherein the electric heater further comprises a circuit board assembly, the switching element comprises an insulating portion, a conductive portion, a main body end of the conductive portion is integrally fixed with the insulating portion, a pin portion of the conductive portion is located outside the insulating portion, and the pin portion is fixedly connected with the circuit board assembly by welding; the bearing part is contacted with at least part of the switch element to transfer heat, the temperature detection element comprises a temperature sensing part, the shell part of the temperature sensing part and the bearing part are integrally formed, and the temperature sensing part of the temperature detection element is at least close to the outer wall of the switch element.
4. The electric heater according to claim 3, wherein the insulating portion includes a first wall portion and a second wall portion, the first wall portion being disposed opposite to the second wall portion, wherein the first wall portion is in contact with the pressure receiving portion and is disposed in contact with or close to the temperature sensing portion, and the second wall portion of the insulating portion is in contact with the top wall portion of the lid body.
5. The electric heater of claim 4, further comprising a heat conductive adhesive, wherein the top wall of the cover comprises the heat conductive adhesive, the heat conductive adhesive is attached to the second wall of the switch element, the base is welded to the cover, the electric heater comprises a cavity between the base and the cover, the cover comprises a protruding heat conductive protrusion, and the top wall of the cover is opposite to the heat conductive protrusion, and the heat conductive protrusion can absorb heat at the top wall.
6. The electric heater according to claim 1 or 2, wherein the electric heater further comprises a circuit board assembly, the switching element comprises an insulating portion and a conductive portion, the main body end of the conductive portion is integrally fixed to the insulating portion, the leg portion of the conductive portion is located outside the insulating portion, the leg portion is fixedly connected to the circuit board assembly by welding, the insulating portion comprises a first wall portion and a second wall portion, the first wall portion is arranged opposite to the second wall portion, the first wall portion is arranged in contact with the pressure-receiving portion, and the second wall portion of the insulating portion is arranged in contact with the top wall portion of the cover; the temperature detecting element comprises a temperature sensing part, the temperature sensing part is arranged in contact with or close to the first wall part, the temperature sensing part comprises a temperature sensing core, an insulator covering the temperature sensing core and a shell part positioned at least partially outside the insulator, and the shell part of the insulator and the pressure bearing part are integrally formed.
7. The electric heater according to claim 1 or 2, wherein the temperature detecting element comprises a temperature sensing core, an insulator covering the temperature sensing core, and a metal member located at least partially outside the insulator, the metal member comprising the bearing portion, a shell portion of the metal member being not in contact with the abutment portion, the temperature detecting element further comprising a lead wire or a pin electrically connected to the temperature sensing core, the lead wire or the pin being electrically connected to a control component of the electric heater; the shell of the metal piece comprises a bent side wall, the side wall is integrally connected with the pressure bearing part, and the insulator is encapsulated in a gap between the temperature sensing core and the shell of the metal piece through resin.
8. The electric heater according to claim 1 or 2, wherein the body portion is fixedly provided with the cover body, the electric heater includes a screw, the body portion includes metal base portions located at both sides of the switching element, the metal base portions have through holes at both ends, and a portion of the screw is located at the through hole; the cover body comprises a mounting convex part, and the other part of the screw is fixed with the mounting convex part through threaded fit; or the body part and the cover body are arranged in a limiting way, one of the body part and the cover body comprises a buckle, the other of the body part and the cover body comprises a clamping groove, and the buckle and the clamping groove are locked and limited;
The fixing member includes an elastic arm, a connecting portion of which is integrally connected to the body portion, and a cantilever portion of which includes the abutting portion, the abutting portion being freely provided with respect to the body portion; or, the mounting includes the elastic beam, the both ends connecting portion of this elastic beam with this somatic part body coupling, this elastic beam include butt portion, this butt portion is protruding from this both ends connecting portion and is set up.
9. The electric heater of claim 8, wherein the base and the cover are welded together, the electric heater includes a cavity between the base and the cover, the cover includes a protruding heat-conducting protrusion, and the top wall of the cover is opposite to the heat-conducting protrusion, and the heat-conducting protrusion can absorb heat at the top wall.
10. The electric heater of claim 7, wherein the electric heater includes an electrically conductive component, the conductive component comprises a conductive piece, an insulating isolation part, a circuit board component and a conductive heater, wherein the insulating isolation part coats the main body connecting part of the conductive piece, the first plug pin of the conductive piece is electrically connected with the switch circuit of the circuit board component, the switch circuit is electrically connected with the switch element, the second plug pin of the conductive piece is electrically connected with the heating pipe of the electric heater, the insulating isolation part comprises a peripheral wall part which is arranged corresponding to the switch element, the switch element is at least partially positioned in a groove part formed by the peripheral wall part, one of the peripheral wall part and the metal piece comprises a protruding part, the other one of the peripheral wall part and the metal piece comprises a groove part, and the protruding part at least partially cooperates with the groove part to form a limiting structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811637121.1A CN111385916B (en) | 2018-12-29 | 2018-12-29 | Electric heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811637121.1A CN111385916B (en) | 2018-12-29 | 2018-12-29 | Electric heater |
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| Publication Number | Publication Date |
|---|---|
| CN111385916A CN111385916A (en) | 2020-07-07 |
| CN111385916B true CN111385916B (en) | 2022-06-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811637121.1A Active CN111385916B (en) | 2018-12-29 | 2018-12-29 | Electric heater |
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| Publication number | Publication date |
|---|---|
| CN111385916A (en) | 2020-07-07 |
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