CN201491296U - Silicon-nitride electric heating element - Google Patents
Silicon-nitride electric heating element Download PDFInfo
- Publication number
- CN201491296U CN201491296U CN2009201951795U CN200920195179U CN201491296U CN 201491296 U CN201491296 U CN 201491296U CN 2009201951795 U CN2009201951795 U CN 2009201951795U CN 200920195179 U CN200920195179 U CN 200920195179U CN 201491296 U CN201491296 U CN 201491296U
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- tungsten filament
- silicon nitride
- silicon
- heating
- heating element
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Abstract
The utility model relates to a silicon-nitride electric heating element, which comprises a heating tungsten filament, a power lead foot and a flat silicon-nitride substrate, wherein the heating tungsten filament is arranged in the silicon-nitride substrate and is wrapped tightly by the silicon-nitride substrate; and the power lead foot is connected with the heating tungsten filament and is led out of the silicon-nitride substrate. The silicon-nitride electric heating element is characterized in that the heating tungsten filament takes the spiral encircling curve shape; the diameter of the spiral ring of the spiral encircling curve is 0.5-0.8mm; and the heating tungsten filament is spirally encircled on the power lead foot and is connected with one end of the power lead foot. The silicon-nitride electric heating element has the characteristics of good heating effect and high safety and reliability.
Description
Technical field
The utility model relates to field of electric heating, particularly a kind of silicon nitride electric heating element.
Background technology
The silicon nitride electric heating element is owing to heat efficiency height, and electrical safety performance is good, and therefore quick heating is widely used in Instant heating type appliance field.The silicon nitride electric heating element is made up of heating tungsten filament, molybdenum filament and silicon nitride matrix, and the heating tungsten filament is placed in the silicon nitride matrix as pyrotoxin, and molybdenum filament is connected with the tungsten filament that generates heat as extraction pole and draws the silicon nitride matrix.Because the heating tungsten filament has great influence to the heating effect of silicon nitride electric heating element, the shape and the arrangement mode of the tungsten filament that therefore generates heat, and the specification selection of heating tungsten filament itself is the difficult point of art technology.
The Chinese patent publication number is CN2376695Y, and the patent specification that name is called " electric leakage safety-type silicon nitride heat generating body " discloses a kind of heating tungsten filament technology of silicon nitride electric heating element.Heating tungsten filament and molybdenum filament are shown as level bending curve in this technology in Figure of description; the diameter of tungsten filament and molybdenum filament is 0.01-0.5mm; the technical purpose of this technology is reliability and the electric leakage fail safe that improves heater; because when heater ruptures; the tungsten filament cross section of above-mentioned diameter is exposed to energy moment oxidation in the air, and this oxide isolated protective layer can play the earth leakage protective effect.The limitation of prior art is: tungsten filament and molybdenum filament are arranged horizontally, and make the frangibility of heater element own, and tungsten filament is not tight with contacting of silicon nitride electric heating element, and it is inhomogeneous to cause easily generating heat, and produce local overheating.Tungsten filament is that point contacts with molybdenum filament in addition, and the resistance of contact jaw is inhomogeneous, also is easy to generate local overheating.
The utility model content
The purpose of this utility model is to overcome the deficiencies in the prior art, and the silicon nitride electric heating element of the good and safety durable of a kind of heating effect is provided.
A kind of silicon nitride electric heating element comprises the silicon nitride matrix of generate heat tungsten filament, power pins and flat, and described heating tungsten filament is located in the silicon nitride matrix, and is closely wrapped up by the silicon nitride matrix; Described power pins is connected with the heating tungsten filament and draws nitride silicon based external; Described heating tungsten filament be shaped as the spiral surrounding curve, the spiral coil diameter of this spiral surrounding curve is 0.5～0.8mm, described heating tungsten filament helix is looped around on the power pins and with an end of power pins and is connected.
Heating tungsten filament of the present utility model is the curve of spiral surrounding, and the circle of curve directly is 0.5～0.8mm, experiment shows, when the silicon nitride matrix by high temperature, when high-pressure process compresses heating wire, the circle footpath is that the curve of spiral surrounding of 0.5～0.8mm is the tightst with contacting of silicon nitride matrix.The heating wire of spiral surrounding increases heating length, and temperature conduction is more even.Because heating wire contacts effectively with the silicon nitride matrix, also increased the intensity of heater again.The uniformity that is connected with power pins for the tungsten filament that guarantees to generate heat in addition, prevent because the inhomogeneous temperature overheating that causes of junction resistance, described heating tungsten filament helix is looped around on the power pins and is connected with power pins, like this be connected to that multiple spot connects rather than single-point connects, overcome the potential safety hazard of prior art.
In order to realize the earth leakage protective effect; make that the tungsten filament cross section is exposed to energy moment oxidation in the air when heater ruptures; thereby produce diaphragm and prevent electric leakage; the diameter range of heating tungsten filament of the present utility model is 0.12～0.18mm; the technique effect of this scope is to guarantee that heating wire fractures with heater, and heating wire can form protective oxide layer more rapidly simultaneously.
In order to increase heating effect, prolong heating wire efficient heat generation length, the spiral surrounding center line of described heating tungsten filament is curved even distribution in the silicon nitride matrix, and this curve comprises 1～3 continuous U-shaped bending.
In order to increase the distance of drawing between port, the spacing of described power pins and heating tungsten filament link is less than the spacing of its exit.
The utility model compared with prior art has following beneficial effect: heating tungsten filament of the present utility model is the curve of spiral surrounding, and the circle of curve directly is 0.5～0.8mm, experiment shows, when the silicon nitride matrix by high temperature, when high-pressure process compresses heating wire, heating wire under this dimensional structure is the tightst with contacting of silicon nitride matrix, and the high simultaneous temperature conduction of the efficient of its heating is more even.Because heating wire contacts effectively with the silicon nitride matrix, the while has also increased the intensity of heater again.The uniformity that is connected with power pins for the tungsten filament that guarantees to generate heat, prevent because the inhomogeneous temperature overheating that causes of junction resistance, described heating tungsten filament helix is looped around on the power pins and is connected with power pins, like this be connected to that multiple spot connects rather than single-point connects, overcome the potential safety hazard of prior art.
Description of drawings
Fig. 1 is heating tungsten filament of the present utility model and power supply lead wire structural representation;
Fig. 2 is an internal structure schematic diagram of the present utility model.
Embodiment
Shown in Figure 2 as Fig. 1, a kind of silicon nitride electric heating element, the silicon nitride matrix 3 that comprises generate heat tungsten filament 1, power pins 2 and flat, described heating tungsten filament 1 is located in the silicon nitride matrix 3, and closely wrap up by silicon nitride matrix 3, described power pins 2 is connected with heating tungsten filament 1 and draws outside the silicon nitride matrix 3, and described heating tungsten filament 1 is the curve of spiral surrounding, the circle of this spiral surrounding is 0.5～0.8mm directly, is preferably 0.6mm.The diameter range of described heating tungsten filament 1 is 0.12～0.18mm, is preferably 0.13mm.The spiral surrounding center line of described heating tungsten filament 1 is to have 3 continuous U line bend, is the curve of snakelike distribution, and described heating tungsten filament 1 spiral surrounding is connected with power pins 2 on power pins 2.The spacing of described power pins 2 and heating tungsten filament 1 link is less than the spacing of its exit.
Claims (5)
1. silicon nitride electric heating element comprises the silicon nitride matrix of generate heat tungsten filament, power pins and flat, and described heating tungsten filament is located in the silicon nitride matrix, and is closely wrapped up by the silicon nitride matrix; Described power pins is connected with the heating tungsten filament and draws nitride silicon based external; It is characterized in that: described heating tungsten filament be shaped as the spiral surrounding curve, the spiral coil diameter of this spiral surrounding curve is 0.5～0.8mm, described heating tungsten filament helix is looped around on the power pins and with an end of power pins and is connected.
2. silicon nitride electric heating element according to claim 1 is characterized in that: the filament diameter scope of described heating tungsten filament is 0.12～0.18mm.
3. silicon nitride electric heating element according to claim 1 is characterized in that: the spiral surrounding axis of described heating tungsten filament is curved even distribution in the silicon nitride matrix, and described curve comprises the U-shaped bending that several are continuous.
4. silicon nitride electric heating element according to claim 3 is characterized in that: described U-shaped bending has 1～3.
5. according to each described silicon nitride electric heating element of claim 1～4, it is characterized in that: the spacing of described power pins and heating tungsten filament link is less than the spacing of its exit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201951795U CN201491296U (en) | 2009-09-22 | 2009-09-22 | Silicon-nitride electric heating element |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201951795U CN201491296U (en) | 2009-09-22 | 2009-09-22 | Silicon-nitride electric heating element |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201491296U true CN201491296U (en) | 2010-05-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201951795U Expired - Fee Related CN201491296U (en) | 2009-09-22 | 2009-09-22 | Silicon-nitride electric heating element |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201491296U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101945506A (en) * | 2010-08-17 | 2011-01-12 | 钟秉霖 | Ceramic energy heating element |
| CN102821494A (en) * | 2012-08-31 | 2012-12-12 | 黎石红 | Silicon nitride electric heating element and manufacturing method thereof |
-
2009
- 2009-09-22 CN CN2009201951795U patent/CN201491296U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101945506A (en) * | 2010-08-17 | 2011-01-12 | 钟秉霖 | Ceramic energy heating element |
| CN102821494A (en) * | 2012-08-31 | 2012-12-12 | 黎石红 | Silicon nitride electric heating element and manufacturing method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: LUHE CHENGCHANG CERAMIC PRODUCTS CO., LTD. Free format text: FORMER OWNER: GUANGZHOU CHENGCHANG CERAMIC PRODUCTS CO., LTD. Effective date: 20110727 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 511450 GUANGZHOU, GUANGDONG PROVINCE TO: 516700 SHANWEI, GUANGDONG PROVINCE |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20110727 Address after: 516700 Guangdong province inland river county Tian Zhen Bao Jin Cun Wei south to the old factory gold pit power plant Patentee after: Luhe Chengchang ceramic products Co. Ltd. Address before: 511450 Guangdong city of Guangzhou province Panyu District Shi Ji Zhen Guang Hua Road No. 75 Patentee before: Guangzhou Chengchang Ceramic Products Co., Ltd. |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100526 Termination date: 20110922 |