CN204155683U - A kind of high-power heating resistor - Google Patents
A kind of high-power heating resistor Download PDFInfo
- Publication number
- CN204155683U CN204155683U CN201420509336.6U CN201420509336U CN204155683U CN 204155683 U CN204155683 U CN 204155683U CN 201420509336 U CN201420509336 U CN 201420509336U CN 204155683 U CN204155683 U CN 204155683U
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- ceramic substrate
- housing
- interior electrode
- heating panel
- heating resistor
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Abstract
The utility model discloses a kind of high-power heating resistor, comprise a bar printing and have interior electrode, the ceramic substrate of resistive element and back electrode, described ceramic substrate is encapsulated in housing, the back electrode face welding heating panel of described ceramic substrate, the radiating surface of described heating panel exposes housing bottom surface, interior electrode on ceramic substrate is electrically connected with the binding post of drawing housing, material filling hole is inwardly offered from case top, material filling venthole and installing hole, housing cavity encapsulated epoxy resin outside described interior electrode end surface, housing cavity embedding silica gel between described interior electrode end surface and heating panel, it is wide that the utility model has Standard resistance range, and resistance accuracy can reach ± and 0.5%, volume is little, and programming rate is fast, and power is large, and reliability is high, and resistance to pressure is good, the good characteristic that the life-span is long and easy for installation.
Description
Technical field
The utility model relates to electronic devices and components field, particularly relates to a kind of high-power heating resistor, is particularly useful for heating exhaust emissions of diesel engine treatment system urea measuring and injecting device.
Background technology
Heating resistor in use produces heat, by going out to heated object Fast Heating by thermal energy conduction rapidly, improves the heat efficiency to reduce the volume of heating resistor.Common heating resistor conventional at present adopts stainless steel to make base plate, by thick film screen typography, stainless steel base plate directly prints insulating barrier, resistance and electrode slurry, is made by high temperature sintering, Standard resistance range is little, resistance precision is low, reliability and withstand voltage properties poor.Because stainless steel conductive coefficient is low, and can be out of shape in sintering process, cause bottom surface uneven, want to realize high-power, must increase the area of resistive element, existing common heating resistor lacks shell and packaging protection in addition, and moisture-sensitive short circuit inconvenience are installed.
Summary of the invention
For existing heating resistor above shortcomings, it is wide that the purpose of this utility model is to provide a kind of Standard resistance range, and programming rate is fast, and resistance to pressure is good, and precision is high, and volume is little and be convenient to the heating resistor installed.
The purpose of this utility model is achieved through the following technical solutions, a kind of high-power heating resistor, it is characterized in that, comprise the ceramic substrate that a bar printing has interior electrode, resistive element and back electrode, described ceramic substrate is encapsulated in housing, high heat conduction and heat radiation plate is welded in the back electrode face of described ceramic substrate, and the radiating surface of described heating panel exposes housing bottom surface, and the interior electrode on ceramic substrate is electrically connected with the binding post of drawing housing.
Preferably, the housing cavity encapsulated epoxy resin outside described interior electrode end surface, the housing cavity embedding silica gel between described interior electrode end surface and heating panel.
Preferably, described case top center inwardly offers material filling hole, and case top is also provided with material filling venthole.
Preferably, the installing hole running through heating panel is inwardly offered from case top.
Preferably, copper sheet selected by described heating panel.
High-power heating resistor provided by the utility model adopts silk-screen printing technique according to thick-film technique, printed resistor body and electroplax on ceramic substrate, forms through high temperature tunnel furnace sintering, laser resistor trimming, copper soleplate welding, encapsulation.Main body adopts ceramic substrate soldering copper base plate, and heat transfer is fast, and thermal diffusivity is good, volume is little can realize high-power; Adopt silica gel add epoxy resin encapsulated resistance can eliminate solidification to the damage of resistor disc, eliminate stress, protective resistance.
Beneficial effect: the utility model adopt ceramic substrate and copper heating panel with the use of, because be 20W/mK under the conductive coefficient normal temperature of the main component aluminium oxide of ceramic substrate, and be 400W/mK under the conductive coefficient normal temperature of copper, conductive coefficient is about 20 times of aluminium oxide, therefore copper heating panel heat transfer is fast, can be passed to rapidly and uniformly on heated object by heat energy rapidly, can not produce hot localised points, resistive element area need not be increased, can realize high-power.In sum, it is wide that the utility model has Standard resistance range, and resistance accuracy can reach ± and 0.5%, volume is little, and programming rate is fast, and power is large, and reliability is high, and resistance to pressure is good, the good characteristic that the life-span is long and easy for installation.
Accompanying drawing explanation
Fig. 1 is the basic structure schematic diagram of the utility model embodiment;
Fig. 2 is the vertical view of Fig. 1.
Embodiment
Heating resistor provided by the utility model as shown in Figure 1, first on ceramic substrate 7, interior electrode 6, back electrode 8 and resistive element 5 is made with silk screen printing, the back electrode face of described ceramic substrate 7 is welded on copper heating panel 9, ceramic substrate 7 is encapsulated in housing 2 by silica gel 4, epoxy resin 3, the radiating surface of heating panel 9 exposes housing 2 bottom surface, and the interior electrode 6 on ceramic substrate 7 is electrically connected with the binding post 1 of drawing housing 2.Shown in composition graphs 2, housing 2 top center inwardly offers material filling hole 11, and housing 2 top is also provided with material filling venthole 12.The installing hole 10 running through heating panel is inwardly offered from case top.Housing cavity encapsulated epoxy resin 3 outside interior electrode 6 end face, the housing cavity embedding silica gel 4 between interior electrode 6 end face and heating panel 9.Feature of the present utility model is that large, the withstand voltage height of power, volume are little, easy for installation.The resistor of size 30mm*25mm, power can accomplish 150 ~ 200W.
Claims (5)
1. a high-power heating resistor, it is characterized in that, comprise the ceramic substrate that a bar printing has interior electrode, resistive element and back electrode, described ceramic substrate is encapsulated in housing, the back electrode face welding heating panel of described ceramic substrate, the radiating surface of described heating panel exposes housing bottom surface, and the interior electrode on ceramic substrate is electrically connected with the binding post of drawing housing.
2. the high-power heating resistor of one according to claim 1, is characterized in that, the housing cavity encapsulated epoxy resin outside described interior electrode end surface, the housing cavity embedding silica gel between described interior electrode end surface and heating panel.
3. the high-power heating resistor of one according to claim 2, is characterized in that, described case top center inwardly offers material filling hole, and case top is also provided with material filling venthole.
4. the high-power heating resistor of one according to claim 1 and 2, is characterized in that, inwardly offers the installing hole running through heating panel from case top.
5. the high-power heating resistor of one according to claim 1, is characterized in that, copper sheet selected by described heating panel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420509336.6U CN204155683U (en) | 2014-09-05 | 2014-09-05 | A kind of high-power heating resistor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420509336.6U CN204155683U (en) | 2014-09-05 | 2014-09-05 | A kind of high-power heating resistor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204155683U true CN204155683U (en) | 2015-02-11 |
Family
ID=52513781
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420509336.6U Active CN204155683U (en) | 2014-09-05 | 2014-09-05 | A kind of high-power heating resistor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204155683U (en) |
-
2014
- 2014-09-05 CN CN201420509336.6U patent/CN204155683U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20180605 Address after: No. 818 Xingzhong Road, Bengbu, Anhui Province, Anhui Patentee after: BDS ELECTRONICS INC. Address before: 233010 818 Xingzhong Road, hi tech Industrial Development Zone, Bengbu, Anhui Patentee before: DRT RESISTOR TECHNOLOGY CO., LTD. |