CN111822943A - Method for producing electric heater and electric heater - Google Patents
Method for producing electric heater and electric heater Download PDFInfo
- Publication number
- CN111822943A CN111822943A CN201910325990.9A CN201910325990A CN111822943A CN 111822943 A CN111822943 A CN 111822943A CN 201910325990 A CN201910325990 A CN 201910325990A CN 111822943 A CN111822943 A CN 111822943A
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- China
- Prior art keywords
- contact
- injection molding
- conductive element
- contact portion
- electric heater
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
-
- 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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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
A method for manufacturing an electric heater comprises the steps of forming a rudiment of a conductive element, performing first injection molding by taking the rudiment of the conductive element as an injection molding insert to form a first injection molding body, processing the first injection molding body to form a rudiment of a connecting piece, and performing second injection molding on the rudiment of the connecting piece to form the connecting piece.
Description
[ technical field ] A method for producing a semiconductor device
The invention relates to the technical field of vehicles, in particular to a manufacturing method of an electric heater and the electric heater.
[ background of the invention ]
The electric heater comprises a heating element, a conductive element, an insulating element and an electric control board, wherein the heating element is electrically connected with the electric control board through the conductive element, the insulating element is arranged between the conductive element and the electric control board so as to avoid the risk of electric leakage between the electric control board and other components, and the conductive element and the insulating element are independent elements, so that the electric heater can cause a product to be relatively overstaffed and is relatively complex to assemble.
[ summary of the invention ]
The invention aims to provide a manufacturing method of an electric heater and the electric heater, which are beneficial to simplifying an assembly process and a product structure.
In order to achieve the purpose, the invention adopts the following technical scheme:
a method of manufacturing an electric heater comprising a connector comprising an electrically conductive element and an insulating portion, the method comprising the steps of:
s1: forming a conductive element prototype;
s2: performing first injection molding by taking the rudiment of the conductive element as an injection molding insert to form a first injection molding body, wherein the first injection molding body comprises a connecting part which is completely exposed;
s3: processing the connecting part of the first injection molding body to form a connecting part prototype, wherein the connecting part prototype comprises the conductive element with a part exposed after the connecting part is cut off;
s4: and carrying out secondary injection molding on the connecting piece prototype to form the connecting piece.
An electric heater comprises an upper shell, an electric control plate, a connecting piece, a cover plate, a heater main body, a heating element and a lower shell, wherein a cavity is formed in the heater main body, a heat conducting part is arranged in the cavity, the cover plate and the heater main body are sealed to form a relatively sealed fluid cavity, the fluid cavity is communicated with an inlet and an outlet of the electric heater, the heating element is arranged in the heater main body, the electric control plate is arranged above the cover plate, one surface of the cover plate, far away from the cavity, is defined as an upper surface, and at least part of the connecting piece is positioned between the cover plate and the electric control plate;
the connecting piece comprises a conductive element and an insulating part, and at least part of the conductive element and the insulating part are fixed in an injection molding mode; the connecting piece comprises a flat part and a bent part, the flat part comprises a first side part and a second side part, the first side part faces the electric control board, and the second side part faces the cover plate; the conductive element comprises a first contact part and a second contact part, the first contact part protrudes out of the flat part, the second contact part protrudes out of the bent part, the heating element comprises a connecting end, the connecting end is electrically connected with the second contact part, and the first contact part is electrically connected with the electric control board; the connector is formed by the above method of manufacturing the electric heater.
The invention provides a manufacturing method of an electric heater and the electric heater, which comprises the steps of forming a rudiment of a conductive element, performing first injection molding by taking the rudiment of the conductive element as an injection molding insert to form a first injection molding body, processing the first injection molding body to form a rudiment of a connecting piece, and performing second injection molding on the rudiment of the connecting piece to form the connecting piece.
[ description of the drawings ]
FIG. 1 is an exploded view of an electric heater;
FIG. 2 is a schematic perspective view of an example of the first embodiment of the connector of FIG. 1;
FIG. 3 is a cross-sectional structural view of the connector of FIG. 2;
FIG. 4 is a schematic perspective view of one embodiment of the heating element of FIG. 1;
FIG. 5 is a schematic view of the heating element, the driving module and the conductive element electrically connected according to the first embodiment;
FIG. 6 is a schematic flow diagram of a portion of a method of manufacturing an electric heater;
FIG. 7 is a schematic perspective view of an example of an embryonic conductive element of the first embodiment;
FIG. 8 is a schematic perspective view of an embodiment of a first injection molded body of the first embodiment;
FIG. 9 is a schematic perspective view of an example of a connector rudiment of the first embodiment;
FIG. 10 is a schematic perspective view of an example of an embryonic conductive element of the second embodiment;
FIG. 11 is a schematic view of an electrical connection of the temperature fuse, the heating element and the conductive element in the second embodiment;
FIG. 12 is a schematic perspective view of an embodiment of a first injection molded body of a second embodiment;
FIG. 13 is a schematic perspective view of the first injection molded part of FIG. 12 from another angle;
FIG. 14 is a perspective view of one example of a connector rudiment of the second embodiment;
FIG. 15 is a perspective view of an example of a second embodiment of the connector of FIG. 1;
fig. 16 is a schematic perspective view of another angle of the connector of fig. 15.
[ detailed description ] embodiments
The invention will be further described with reference to the following figures and specific examples:
referring to fig. 1, the electric heater 100 includes an upper housing 1, an electric control board 2, a connecting member 3, a cover plate 4, a heater main body 5, a heating element 6, and a lower housing 7, wherein the heater main body 5 is formed with a cavity 51, a heat conducting portion is disposed in the cavity 51, the cover plate 4 and the heater main body 5 are sealed to form a relatively sealed fluid chamber, the fluid chamber is communicated with an inlet 52 and an outlet 53 of the electric heater 100, the heating element 6 is disposed in the heater main body 5, and the electric heater 100 heats the heating element 6 and heats a working medium in the fluid chamber by supplying electricity from the outside.
The cover plate 4 can be formed by metal materials, the electric control plate 2 is arranged above the cover plate 4, and the surface of the cover plate 4 far away from the cavity 51 is defined as the upper surface; in order to avoid electric leakage caused by direct contact between the electric control board 2 and the cover board 4, a connecting piece 3 is arranged between the cover board 4 and the electric control board 2, and at least part of the connecting piece 3 is positioned between the cover board 4 and the electric control board 2.
Referring to fig. 1 to 3, the connector 3 includes a conductive element 31 and an insulating portion 32, and at least a part of the conductive element 31 and the insulating portion 32 are fixed by injection molding; in the present embodiment, the connecting member 3 includes a flat portion 33 and a bent portion 34, the flat portion 33 includes a first side portion 331 and a second side portion 332, specifically, the first side portion 331 faces the electric control board 2, and the second side portion 332 faces the cover plate 4; the conductive element 31 comprises a first contact portion 311 and a second contact portion 312, the first contact portion 311 is disposed to protrude from the flat portion 33, the second contact portion 312 is disposed to protrude from the bent portion 34, specifically, the first contact portion 311 is disposed to protrude toward the electric control board 2, and the second contact portion 312 is disposed to protrude toward the heating element 6; the heating element 6 is electrically connected with the conductive element 31, the conductive element 31 is electrically connected with the electric control board 2, specifically, the heating element 6 is electrically connected with the second contact part 312, and the first contact part 311 is electrically connected with the electric control board 2; in the present embodiment, referring to fig. 1 and 2, the leveling part 33 further includes a receiving slot 333, at least a part of the driving module 21 is received in the receiving slot 333, wherein the driving module 21 can control the power-on or power-off state of the heating element 6, and the driving module 21 is electrically connected in the circuit loop of the heating element 6 for controlling the working state of the heating element 6; the bending portion 34 further includes an extending portion 341, the extending portion 341 is located at the periphery of the second contact portion 312, the second contact portion 312 is electrically connected to the heating element 6, and the provision of the extending portion 341 is beneficial to improving the insulation between the electric connection portion (exposed outside) of the heating element 6 and the second contact portion 312 and the periphery thereof.
In the present embodiment, the heating element 6 is a U-shaped heating tube, as shown in fig. 4, the heating element 6 includes a tube body 61 and two connecting ends 62, and the number of the connecting ends 62 is two; in the present embodiment, the number of the heating elements 6 is three, that is, the number of the connection ends 62 is six, the number of the heating elements 6 can be adjusted as required, and accordingly, the number of the connection ends 62 can be changed accordingly. The heating element 6 is electrically connected to the second contact portion 312, specifically, the connection end 62 of the heating element 6 is electrically connected to the second contact portion 312, that is, the number of the second contact portions 312 is six in the present embodiment, specifically, including 312a, 312b, 312c, 312d, 312e and 312 f; the first contact portions 311 of the conductive element 31 are electrically connected to the electronic control board 2, and an external power supply supplies power to the heating element 6 through the electronic control board 2 and the conductive element 31. The conductive element blank is formed by blanking conductive metal plates integrally, the first contact part and the second contact part are formed by bending to form a conductive element prototype, the conductive element prototype is blanked to form a conductive element after the first injection molding, and the specific process is further introduced according to the embodiment. For the independent control of the heating elements 6, four drive modules 21 are provided, which are electrically connected in a schematic manner in fig. 5.
Referring to fig. 6, a partial flow chart of a manufacturing method of an electric heater provided by the present invention is schematically illustrated, and the specific steps of the manufacturing method include:
s1: forming a conductive element prototype 31';
referring to fig. 7, the conductive element blank 31 'may be formed by a stamping die, a conductive metal plate such as copper, aluminum, etc. is first punched integrally by a first stamping die to obtain a conductive element blank located in the same plane, the conductive element blank includes a first contact portion 311, a second contact portion 312 and a first connection portion 313, the first connection portion 313 enables the conductive element blank to be punched into a whole, which is beneficial to simplification of the first stamping die, and then the first contact portion 311 and the second contact portion 312 are bent to form the conductive element blank 31', the first contact portion 311 and the second contact portion 312 are arranged to protrude with respect to the first connection portion 313, the first contact portion 311 protrudes toward one side of the first connection portion 313, and the second contact portion 312 protrudes toward the other side of the first connection portion 313; in the present embodiment, the number of the first contact portions 311 is four, specifically including 311a, 311b, 311c, and 311d, and the number of the second contact portions 312 is six, specifically including 312a, 312b, 312c, 312d, 312e, and 312 f.
S2: performing first injection molding by taking the conductive element prototype 31' as an injection molding insert to form a first injection molding body 200;
referring to fig. 8, the conductive element blank 31 ' formed by stamping is used as an injection molding insert, the formed conductive element blank 31 ' is placed in a first injection mold for first injection molding, so as to form a first injection molded body 200, the material for first injection molding may be a plastic material known in the art and having high temperature resistance, insulation and flame retardancy, such as PA material (polyamide, PA material), PPS material (PPS plastic), etc., the first injection molded body 200 includes a flat portion 33 and a bent portion 34, the first contact portion 311 protrudes from the flat portion 33, the second contact portion 312 protrudes from the bent portion 34, the first injection molded body 200 further includes a first notch groove 201, the first notch groove 201 penetrates through the first side portion 331 and the second side portion 332, and the first notch groove 201 makes the first connection portion 313 of the conductive element blank 31 ' completely exposed.
S3: processing the first injection molded body 200 to form a connecting piece prototype 300;
referring to fig. 9, first injection-molded body 200 is processed, and in this embodiment, first injection-molded body 200 is punched by a second stamping die, specifically, first connection portion 313 of conductive element blank 31' completely exposed in first injection-molded body 200 is punched, and at least first connection portion 313 is cut by the punching process to form conductive element 31, thereby forming connector blank 300.
S4: and performing secondary injection molding on the connecting piece prototype 300 to form the connecting piece 3.
Referring to fig. 2, the connector prototype 300 is placed in a second injection mold for a second injection molding to fill the first notch groove 201 to form the connector 3, and the material of the second injection molding may be the same as that of the first injection molding, but as another embodiment, the material of the second injection molding may be different from that of the first injection molding.
Referring to fig. 10 to 16, the technical solution of the second embodiment is mainly different from that of the first embodiment in that: the conductive element in the second embodiment further includes an electrical connection portion with the temperature fuse 8, specifically, the conductive metal plate forms a conductive element blank 31 "through a third stamping die, the conductive element blank 31" further includes a third contact portion 314, a fourth contact portion 315 and a second short-circuited connection portion 316, the third contact portion 314 and the fourth contact portion 315 are provided with a patch jack 317, the third contact portion 314 is electrically connected with one end of the temperature fuse 8, the fourth contact portion 315 is electrically connected with the other end of the temperature fuse 8, more specifically, the temperature fuse 8 includes conductive connection portions at two ends, the conductive connection portions extend into the patch jacks 317 of the third contact portion 314 and the fourth contact portion 315, and the temperature fuse 8 is electrically connected with the third contact portion 314 and the fourth contact portion 315 through the patch jack 317; in the present embodiment, the number of the heating elements 6 is three, each heating element 6 is connected with one thermal fuse 8 in series, that is, the number of the thermal fuses 8 is three, that is, the number of the third contacts 314 is three, specifically including 314a, 314b and 314c, the number of the fourth contacts 315 is three, specifically including 315a, 315b and 315c, the number of the patch holes 317 is 6, and the electrical connection manner thereof is schematically shown in fig. 11.
Performing primary injection molding by taking the conductive element prototype 31 ″ as an injection molding insert to form a first injection molded body 200 ', wherein the first injection molded body 200' comprises a first notch groove 201 and a second notch groove 203, the first notch groove 201 penetrates through a first side portion 331 and a second side portion 332, the second notch groove 203 penetrates through the first side portion 331 and the second side portion 332, the first notch groove 201 enables a first connecting portion 313 of the conductive element prototype 31 ″ to be completely exposed, and the second notch groove 203 enables a second connecting portion 316 of the conductive element prototype 31 ″ to be completely exposed; the first injection-molded body 200' further comprises contact slots 204 and through holes 205, the number of the contact slots 204 is the same as that of the through holes 205, at least part of the third contact portions 314 and at least part of the fourth contact portions 315 are exposed in the contact slots 204, the through holes 205 are arranged corresponding to the patch jack 317, and specifically, the conductive connecting portions of the thermal fuse 8 extend into the patch jack 317 through the through holes 205 and are electrically connected with the third contact portions 314 and the fourth contact portions 315 through the patch jack 317; in the present embodiment, the conductive connection portion of the thermal fuse 8 is fixed to the patch jack 317 by welding, and the contact slot 204 can provide a corresponding space for the welding of the conductive connection portion to the patch jack 317.
The first injection molded body 200 'is processed to form the connector prototype 300', and in this embodiment, the first connection portion 313 and the second connection portion 316 completely exposed in the first injection molded body 200 'are specifically blanked, and at least the first connection portion 313 and the second connection portion 316 are cut off to avoid causing a short circuit, so as to form the connector prototype 300'.
The second injection molding of the connector prototype 300 'forms the connector 3', and specifically, the first and second cutaway grooves 201 and 203 in the connector prototype 300 'are filled to form the connector 3'.
It should be noted that: although the present invention has been described in detail with reference to the above-mentioned 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 (9)
1. A method of manufacturing an electric heater comprising a connector comprising an electrically conductive element and an insulating portion, the method comprising the steps of:
s1: forming a conductive element prototype;
s2: performing first injection molding by taking the rudiment of the conductive element as an injection molding insert to form a first injection molding body, wherein the first injection molding body comprises a connecting part which is completely exposed;
s3: processing the connecting part of the first injection molding body to form a connecting part prototype, wherein the connecting part prototype comprises the conductive element with a part exposed after the connecting part is cut off;
s4: and carrying out secondary injection molding on the connecting piece prototype to form the connecting piece.
2. The method of manufacturing an electric heater according to claim 1, wherein: in step S1, the conductive element prototype includes a first contact portion, a second contact portion, and a first connection portion, where the first contact portion and the second contact portion are disposed to protrude from the first connection portion, the first contact portion protrudes toward one side of the first connection portion, and the second contact portion protrudes toward the other side of the first connection portion.
3. The method of manufacturing an electric heater according to claim 2, wherein: in step S2, the first injection molded body includes a flat portion and a bent portion, the flat portion includes a first side portion and a second side portion, the first contact portion protrudes from the flat portion, and the second contact portion protrudes from the bent portion; the first injection molding body further comprises a first notch groove, the first notch groove penetrates through the first side portion and the second side portion, and the first notch groove is completely exposed out of the first connecting portion.
4. The method of manufacturing an electric heater according to claim 3, wherein: the processing in step S3 includes the blanking, the blanking process is at least decided first connecting portion, in step S4 the second time is moulded plastics and is used for moulding plastics and fill first breach groove.
5. The method of manufacturing an electric heater according to claim 2, wherein: in step S1, the rudiment of conductive element further includes a third contact portion, a fourth contact portion and a second connection portion, and the third contact portion and the fourth contact portion are provided with a patch jack; the third contact portion, the fourth contact portion and the second connecting portion are flush with the first connecting portion.
6. The method of manufacturing an electric heater according to claim 5, wherein: in step S2 the first injection molding body includes leveling portion and the portion of bending, the leveling portion includes first lateral part and second lateral part, first contact portion protrusion in the leveling portion sets up, second contact portion protrusion in the portion of bending sets up, first injection molding body still includes first breach groove, second breach groove, contact slot and through-hole, first breach groove runs through first lateral part with the second lateral part, second breach groove runs through first lateral part with the second lateral part, first breach groove exposes completely first connecting portion, second breach groove exposes completely the second connecting portion, at least part the third contact portion with at least part the fourth contact portion exposes in the contact slot, the through-hole with connect the corresponding setting of hole.
7. The method of manufacturing an electric heater according to claim 6, wherein: processing in step S3 includes the blanking, the blanking process is decided at least first connecting portion with the second connecting portion, in step S4 the second time is moulded plastics and is used for moulding plastics the filling first breach groove with the second breach groove.
8. The manufacturing method of an electric heater according to any one of claims 1 to 7, wherein: the material of the conductive element prototype in step S1 may be copper or aluminum, the material of the first injection molding in step S2 may be PA raw material or PPS raw material, and the material of the second injection molding in step S4 may be PA raw material or PPS raw material.
9. An electric heater comprises an upper shell, an electric control plate, a connecting piece, a cover plate, a heater main body, a heating element and a lower shell, wherein a cavity is formed in the heater main body, a heat conducting part is arranged in the cavity, the cover plate and the heater main body are sealed to form a relatively sealed fluid cavity, the fluid cavity is communicated with an inlet and an outlet of the electric heater, the heating element is arranged in the heater main body, the electric control plate is arranged above the cover plate, one surface of the cover plate, far away from the cavity, is defined as an upper surface, and at least part of the connecting piece is positioned between the cover plate and the electric control plate;
the connecting piece comprises a conductive element and an insulating part, and at least part of the conductive element and the insulating part are fixed in an injection molding mode; the connecting piece comprises a flat part and a bent part, the flat part comprises a first side part and a second side part, the first side part faces the electric control board, and the second side part faces the cover plate; the conductive element comprises a first contact part and a second contact part, the first contact part protrudes out of the flat part, the second contact part protrudes out of the bent part, the heating element comprises a connecting end, the connecting end is electrically connected with the second contact part, and the first contact part is electrically connected with the electric control board; the connector is formed by the manufacturing method of the electric heater of claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910325990.9A CN111822943A (en) | 2019-04-23 | 2019-04-23 | Method for producing electric heater and electric heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910325990.9A CN111822943A (en) | 2019-04-23 | 2019-04-23 | Method for producing electric heater and electric heater |
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| Publication Number | Publication Date |
|---|---|
| CN111822943A true CN111822943A (en) | 2020-10-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910325990.9A Pending CN111822943A (en) | 2019-04-23 | 2019-04-23 | Method for producing electric heater and electric heater |
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| CN (1) | CN111822943A (en) |
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Application publication date: 20201027 |
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