CN214046048U - Waterproof PTC heat-generating body and waterproof heater based on same - Google Patents
Waterproof PTC heat-generating body and waterproof heater based on same Download PDFInfo
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- CN214046048U CN214046048U CN202022459124.XU CN202022459124U CN214046048U CN 214046048 U CN214046048 U CN 214046048U CN 202022459124 U CN202022459124 U CN 202022459124U CN 214046048 U CN214046048 U CN 214046048U
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- waterproof
- alumina ceramic
- ceramic substrate
- ptc
- heating element
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- 239000000919 ceramic Substances 0.000 claims abstract description 22
- 238000009434 installation Methods 0.000 claims abstract description 9
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 58
- 239000000758 substrate Substances 0.000 claims description 58
- 239000003292 glue Substances 0.000 claims description 22
- 238000010438 heat treatment Methods 0.000 claims description 21
- 230000017525 heat dissipation Effects 0.000 claims description 15
- 238000007789 sealing Methods 0.000 claims description 13
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract description 14
- 239000000741 silica gel Substances 0.000 abstract description 12
- 229910002027 silica gel Inorganic materials 0.000 abstract description 12
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 5
- 229910052782 aluminium Inorganic materials 0.000 description 5
- 229920001721 polyimide Polymers 0.000 description 4
- 239000000428 dust Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 239000000565 sealant Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000004642 Polyimide Substances 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 230000001680 brushing effect Effects 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 239000000499 gel Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052574 oxide ceramic Inorganic materials 0.000 description 1
- 239000011224 oxide ceramic Substances 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The utility model discloses a waterproof PTC heat-generating body and waterproof heater based on this heat-generating body. The PTC ceramic chip, the upper electrode and the lower electrode are arranged in the insulating mounting shell, then the bottom surface and two side surfaces of the insulating mounting shell are sealed through waterproof silica gel, seal heads are packaged on the top surface of the insulating mounting shell, and leading-out ends of the upper electrode and the lower electrode are led out from the seal heads. The advantages are that: not only the power is greatly improved, but also the short circuit problem caused by the damage of the insulating film is avoided; the safety performance of the PTC heater is improved, reliable waterproof and dustproof performances are achieved, the whole structure is simple in design, the manufacturing process is simple, the installation is convenient, and the conductive efficiency is further improved.
Description
Technical Field
The utility model relates to a PTC heater structure, specifically speaking are waterproof PTC heat-generating body and waterproof heater based on this heat-generating body.
Background
In some northern or severe cold areas, the requirement on heating power of an automobile air conditioner is higher due to the fact that the outdoor temperature is too low in winter, and under the limit of a certain space structure, the difficulty is always that how to improve the power exerted by a single PTC ceramic chip and achieve the aims of water resistance and dust prevention.
In the prior art, the conventional PTC heater generally adopts a PTC ceramic chip as a heating element, the electrode and the PTC ceramic chip are cured at high temperature through silica gel, then the heating strip and the alumina insulation substrate are solidified at high temperature through silica gel, and then wrapped by a polyimide insulation film, then the heating core is formed after penetrating into the aluminum pipe and being compressed, and finally the heating core and the radiating fins are assembled into a PTC heater body through silica gel, because the alumina ceramic substrate, the polyimide film, the silica gel, the aluminum tube and other intermediate media are more and the heat resistance is large, the power exerted by the single PTC ceramic sheet is low, the power of the whole heater is low, and PTC wind heater core mainly relies on the core that generates heat to wear into in the aluminium pipe, and the head and the tail both ends embedment waterproof glue of heater core, and polyimide film is damaged easily in the manufacturing process, causes the short circuit problem and whole manufacturing process is complicated, and manufacturing cost is high.
Disclosure of Invention
The to-be-solved technical problem of the utility model is to provide a waterproof PTC heat-generating body and based on waterproof heater of this heat-generating body that power is high and waterproof dustproof performance is good.
In order to solve the technical problem, the utility model discloses a waterproof PTC heat-generating body, including directly by last alumina ceramic substrate and lower alumina ceramic substrate to closing the insulating installation shell that forms and settle PTC potsherd, last electrode and bottom electrode in insulating installation shell, potsherd, last electrode and bottom electrode settle back in insulating installation shell in bottom surface and the both sides surface of insulating installation shell seal through sealed waterproof glue and the top surface of insulating installation shell is packaged with the head, and the end of drawing forth of going up electrode and bottom electrode is drawn forth from the head.
The upper electrode is bonded between the upper surface of the PTC ceramic sheet and the upper alumina ceramic substrate, and the lower electrode is bonded between the lower surface of the PTC ceramic sheet and the lower alumina ceramic substrate.
The bottom surfaces and the two side surfaces of the upper alumina ceramic substrate and the lower alumina ceramic substrate are provided with heat dissipation walls formed by turned edges, and the sealing waterproof glue is sealed at the joint surfaces of the heat dissipation walls of the upper alumina ceramic substrate and the lower alumina ceramic substrate.
The thickness of the sealing waterproof glue is 0.85-1.25 mm.
The edge of the radiating wall of the upper alumina ceramic substrate and the edge of the radiating wall of the lower alumina ceramic substrate are arranged to be chamfer angle structures, the chamfer angle structures are enabled to form waterproof glue grooves after the upper alumina ceramic substrate and the lower alumina ceramic substrate are closed, and the waterproof sealing glue is sealed at the waterproof glue grooves.
The thickness of the heat dissipation wall is 1-2 mm.
The edges of the radiating walls of the upper alumina ceramic substrate and the lower alumina ceramic substrate are set to be chamfer angles of chamfer angle structures of 0.85-1.25 mm.
The utility model provides a waterproof heater based on waterproof PTC heat-generating body which characterized in that: the heater comprises a plurality of waterproof PTC heating bodies arranged in parallel, a heater body and a base, wherein the heater body is composed of radiating fins adhered to the upper surface and the lower surface of each waterproof PTC heating body, the base is used for installing the heater body, and the heater body is arranged in an installation cavity of the base and is connected with a high-voltage wire harness and a low-voltage wire harness through serial connection holes in the base.
And a head waterproof glue is arranged between the top of the heater body and the inner side of the top of the mounting cavity.
The utility model has the advantages that:
on one hand, the insulating shell is used as a shell and an insulating layer, so that the traditional aluminum tube shell is omitted, an insulating film is not used, the heat resistance of intermediate media such as a polyimide film, silica gel and an aluminum tube is reduced, the power is greatly improved, and the short circuit problem caused by the damage of the insulating film is avoided; on the other hand, the heat conductivity coefficient of the aluminum oxide ceramic substrate is high, the temperature of the PTC ceramic substrate can be accelerated, the thermal shock resistance and the ageing resistance of the PTC ceramic substrate can be improved, and therefore the safety performance of the PTC heater is improved.
Drawings
Fig. 1 is a schematic view of an exploded structure of a waterproof heater based on a waterproof PTC heating element according to the present invention;
FIG. 2 is a schematic view of the overall structure of the heater body according to the present invention;
fig. 3 is a schematic view of the exploded structure of the waterproof heater of the present invention;
fig. 4 is a schematic view of the overall structure of the waterproof heater of the present invention.
Detailed Description
The waterproof PTC heating element and the waterproof heater using the same according to the present invention will be described in detail with reference to the accompanying drawings and embodiments.
The first embodiment is as follows:
as shown in the figures, the waterproof PTC heating element of the present invention comprises an upper alumina ceramic substrate 1, a lower alumina ceramic substrate 2, a ceramic sheet 3, an upper electrode 4 and a lower electrode 5, wherein the bottom surfaces and both side surfaces of the upper alumina ceramic substrate 1 and the lower alumina ceramic substrate 2 are provided with heat dissipation walls formed by flanges, the thickness of the upper alumina ceramic substrate 1 and the lower alumina ceramic substrate 2 is 1.5mm, the flatness is 0.02-0.05mm, preferably, the flatness is required to be 0.02mm, 96 ceramic materials are adopted, so that the heat dissipation walls are not easily fractured or crushed when assembled and cured with heat dissipation fins, and the thickness of the heat dissipation walls is 1-2 mm, preferably, the heat dissipation walls are 1.2-1.8 mm; more preferably 1.4-1.6mm, and improve the insulating property of the PTC heater, of course, the top of the upper alumina ceramic substrate 1 and the bottom alumina ceramic substrate 2 is open, the upper alumina ceramic substrate 1 and the bottom alumina ceramic substrate 2 are jointed to form the insulating mounting case 6, the PTC ceramic plate 3, the upper electrode 4 and the lower electrode 5 are arranged in the insulating mounting case, the upper alumina ceramic substrate 1 and the bottom alumina ceramic substrate 2 play the role of fixing and heat conducting, as can be seen from the figure, the upper electrode 4 is adhered between the upper surface of the PTC ceramic plate 3 and the upper alumina ceramic substrate 1, the lower electrode 5 is adhered between the lower surface of the PTC ceramic plate 3 and the lower alumina ceramic substrate 2, the heat dissipation walls of the upper alumina ceramic substrate 1 and the lower alumina ceramic substrate 2 after jointing inevitably have a joint surface, the ceramic substrate joint surfaces (the bottom surface and the two side surfaces) of the heat dissipation walls of the upper alumina ceramic substrate 1 and the lower alumina ceramic substrate 2 are sealed by waterproof silica gel 7, a seal head 8 is packaged on the top surface of the insulating mounting shell), and leading-out ends of the upper electrode 4 and the lower electrode 5 are led out from the seal head 8.
Furthermore, the edges of the heat dissipation walls of the upper alumina ceramic substrate 1 and the lower alumina ceramic substrate 2 are arranged to be bevel structures, the bevel angles of the upper alumina ceramic substrate 1 and the lower alumina ceramic substrate 2 are symmetrical, the bevel angle of the bevel structure is 0.85-1.25mm, preferably 0.9-1.1mm, further preferably 0.95-1.05mm, the bevel structure forms a waterproof glue groove after the alumina ceramic substrate 1 and the lower alumina ceramic substrate 2 are folded, the waterproof silica gel 7 is encapsulated at the waterproof glue groove to achieve the waterproof and dustproof effects, the sealing waterproof glue 7 is various waterproof silica gels in the field, is silica gel with heat resistance temperature more than or equal to 280 ℃ and strong adhesion, has the thickness of 0.85-1.25mm, preferably 0.9-1.1mm, more preferably 0.95-1.05mm, and reduces the risk of leakage of the PTC ceramic sheet by sealing with the sealing waterproof glue.
Example two:
the utility model provides a waterproof heater based on waterproof PTC heat-generating body which characterized in that: including a plurality of parallel arrangement's waterproof PTC heat-generating body and paste the heater body that constitutes at the fin 9 of each waterproof PTC heat-generating body upper surface and lower surface through silica gel, still including the base 10 that is used for installing the heater body, base 10 is including the base member that has the arrangement chamber and can encapsulate the closing cap on the base member, the heater body is settled and is connected with high-low pressure pencil 11 through the serial ports on the base 10 and the encapsulation of closing cap in the installation intracavity of base member, in addition, can also have head waterproof glue 12 between the top of heater body and the top inboard of arrangement chamber, it is whole waterproof to reach the heater, dustproof effect.
The specific preparation method comprises the following steps:
firstly, a 300-mesh screen plate is adopted on a lower electrode 5 for brushing glue on two sides of the electrode, the electrode is placed in a lower alumina ceramic substrate 2, a plurality of PTC ceramic plates 3 are placed on the lower electrode 5, an upper electrode 4 brushed with glue is placed on the PTC ceramic plate 3, then the upper alumina ceramic substrate 1 is covered, the work fixture is utilized to carry out neat and flat arrangement, then high temperature curing is carried out, wherein the curing temperature can be 190-210 ℃, the time can be 300-600 s, the pressure is 2-4 MPa, and the upper and lower surfaces are buffered by high-temperature gaskets, in order to prevent the phenomena of crushing, fracturing and the like caused by uneven stress, the prepared heating body is coated on the side wall of the heating body by a glue spreader with high-temperature and strong-viscosity silica gel, the sealing waterproof glue is seamlessly connected with the upper alumina ceramic substrate and the lower alumina ceramic substrate, so that the PTC ceramic plate is prevented from contacting with external water and dust, and the risk of electric leakage is reduced; and then assembling the prepared heating body and the radiating fins by silica gel for electrification and solidification, wherein the voltage is the rated voltage of the heater, the time can be 300-600 s, and the pressure is 0.5-0.7 MPa, so as to form a heater body. The upper and lower electrodes extend out and are electrically connected with an external circuit, the upper and lower electrodes comprise positive electrodes and negative electrodes, the head portions of the upper and lower electrodes are preliminarily sealed by using the seal heads due to the strong flowability of the pouring sealant, then the upper and lower electrodes are welded or assembled with high and low voltage wire harnesses, the head portions are filled with the sealant, and then the base is assembled to form the heater.
Of course, the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and the changes, modifications, additions or substitutions made by those skilled in the art within the scope of the present invention should also belong to the protection scope of the present invention.
Claims (9)
1. A waterproof PTC heating element is characterized in that: the sealing device comprises an insulating mounting shell (6) formed by directly combining an upper alumina ceramic substrate (1) and a lower alumina ceramic substrate (2), and a PTC ceramic sheet (3), an upper electrode (4) and a lower electrode (5) arranged in the insulating mounting shell, wherein the ceramic sheet (3), the upper electrode (4) and the lower electrode (5) are arranged in the insulating mounting shell (6) and then sealed by sealing waterproof glue (7) on the bottom surface and two side surfaces of the insulating mounting shell, a sealing head (8) is packaged on the top surface of the insulating mounting shell, and the leading-out ends of the upper electrode (4) and the lower electrode (5) are led out from the sealing head (8).
2. A waterproof PTC heating element according to claim 1, characterized in that: the upper electrode (4) is bonded between the upper surface of the PTC ceramic plate (3) and the upper alumina ceramic substrate (1), and the lower electrode (5) is bonded between the lower surface of the PTC ceramic plate (3) and the lower alumina ceramic substrate (2).
3. A waterproof PTC heating element according to claim 1, characterized in that: the bottom surfaces and the two side surfaces of the upper alumina ceramic substrate (1) and the lower alumina ceramic substrate (2) are provided with heat dissipation walls formed by flanges, and the sealing waterproof glue (7) is sealed at the joint surfaces of the heat dissipation walls of the upper alumina ceramic substrate (1) and the lower alumina ceramic substrate (2).
4. A waterproof PTC heating element according to claim 3, characterized in that: the thickness of the sealing waterproof glue (7) is 0.85-1.25 mm.
5. A waterproof PTC heating element according to claim 4, characterized in that: go up the heat dissipation wall edge of alumina ceramic base plate (1) and lower alumina ceramic base plate (2) and set up to the chamfer angle structure, go up alumina ceramic base plate (1) and make the chamfer angle structure form the waterproof gluey groove after closing of lower alumina ceramic base plate (2), sealed waterproof glue (7) are sealed in waterproof gluey groove department.
6. A waterproof PTC heating element according to claim 5, characterized in that: the thickness of the heat dissipation wall is 1-2 mm.
7. A waterproof PTC heating element according to claim 6, wherein: the chamfer angle of the chamfer angle structure of the upper alumina ceramic substrate (1) and the lower alumina ceramic substrate (2) is 0.85-1.25 mm.
8. A waterproof heater based on the waterproof PTC heat-generating body as defined in any one of claims 1 to 7, characterized in that: including a plurality of parallel arrangement's waterproof PTC heat-generating body and paste each the heater body that fin (9) of waterproof PTC heat-generating body upper surface and lower surface constitute still includes base (10) that are used for installing the heater body, the heater body is settled in the installation cavity of base and is connected with high-low pressure pencil (11) through the series connection hole on base (10).
9. A waterproof heater of a waterproof PTC heating element according to claim 8, characterized in that: a head waterproof glue (12) is arranged between the top of the heater body and the inner side of the top of the mounting cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022459124.XU CN214046048U (en) | 2020-10-29 | 2020-10-29 | Waterproof PTC heat-generating body and waterproof heater based on same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022459124.XU CN214046048U (en) | 2020-10-29 | 2020-10-29 | Waterproof PTC heat-generating body and waterproof heater based on same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214046048U true CN214046048U (en) | 2021-08-24 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022459124.XU Active CN214046048U (en) | 2020-10-29 | 2020-10-29 | Waterproof PTC heat-generating body and waterproof heater based on same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214046048U (en) |
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2020
- 2020-10-29 CN CN202022459124.XU patent/CN214046048U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Zhenjiang Dongfangshanyuan Electric Heating Co.,Ltd. Assignor: ZHENJIANG DONGFANG ELECTRIC HEATING TECHNOLOGY CO.,LTD. Contract record no.: X2023320000253 Denomination of utility model: A waterproof PTC heating element and a waterproof heater based on the heating element Granted publication date: 20210824 License type: Common License Record date: 20231214 |
|
| EE01 | Entry into force of recordation of patent licensing contract |