CN1446440A - Improvenments relating to electric heating elements - Google Patents
Improvenments relating to electric heating elements Download PDFInfo
- Publication number
- CN1446440A CN1446440A CN01813840.3A CN01813840A CN1446440A CN 1446440 A CN1446440 A CN 1446440A CN 01813840 A CN01813840 A CN 01813840A CN 1446440 A CN1446440 A CN 1446440A
- Authority
- CN
- China
- Prior art keywords
- path
- heating
- electric insulation
- thick
- heating element
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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Classifications
-
- 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
- H05B3/20—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater
- H05B3/22—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater non-flexible
- H05B3/28—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater non-flexible heating conductor embedded in insulating material
-
- 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
- H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
- H05B2203/013—Heaters using resistive films or coatings
-
- 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
- H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
- H05B2203/017—Manufacturing methods or apparatus for heaters
Abstract
In order to accommodate different heating tracks with different power densities on a thick film heating element the thick film heating element is formed with a multi-layer structure in which different heating tracks are in different layers separated by electrical insulation.
Description
Technical field
The present invention relates to the relevant improvement of electrical heating elements, be particularly related to thick-film heating element, this element comprises that being arranged on one generally includes stainless on-chip resistance heating path or resistance heating layer, between this stainless steel and this resistance heating path or the resistance heating layer electric insulation layer is arranged, although also the handlebar ceramic material is used as substrate.This class thick-film heating element uses now in liquid heat utensil such as kettle and hot-water bottle and is used widely.
Background technology
A more than heating path is arranged, for example referring to GB-A-2343352, GB-A-2 335 588 and our UK Patent Application No.0013545.9 on the known thick-film heating element.In this class known application occasion of the thick film element with a plurality of paths, the power density of additional heating path is always enough low, so that it is positioned at the heating element surface and does not occupy too many space.But when requiring to obtain when high-power from additional path, the space on the element disc surfaces just is not enough to hold required path.The example that this thing happens is that a heating appliances is used for heating different liquids, wherein, needs a high power (2-3kW) boiled water rapidly; Need a lower-wattage (6-700W) and lower-wattage density heating milk, make milk not burnt on the bottom of a pan.The lower-wattage density of lower-wattage path means that it can't concentrate in the zonule, and may occupy and the same big space of high power path.Owing to bringing difficulty to the design of heating appliances and raise the cost, be worthless therefore for providing enough areas to strengthen element diameter.
Summary of the invention
Therefore main purpose of the present invention is to overcome or alleviate the problems referred to above at least.
According to the present invention, have the thick-film heating element of sandwich construction for realizing this purpose use one, the different heating path is arranged on the different layers, separate with electrical insulating material between each layer.
Say that definitely for overcoming the problems referred to above, the present invention proposes to print two or more paths, a path is on another path, and the centre separates with a thin dielectric layer.Use this proposal according to the multilayer thick film electronic technology, the high-voltage test of the 1250V that the basic insulation between common heating element and the base steel sheet need bear needn't be born in the intermediate layer.The high-voltage test of 250V only need be born in the intermediate layer, and perhaps high voltage test has only 500V.Therefore the thickness of intermediate insulating layer is thinner than main insulating layer, and for example the main insulating layer with 150 micron thickness relatively has only the 60-80 micron.The increase of the total insulation thickness between additional path and the substrate can improve the operating temperature of this path, but because power density is low, so this temperature rise is in permissible range.The reducing of intermediate layer thickness also helps to keep temperature rise to descend.
The manufacture process of this thick-film heating element for example can comprise the following steps:
1. main insulating layer is printed onto back roasting on the base steel sheet for preparing;
2. roasting behind the main heating of the printing path;
3. roasting behind the printing intermediate insulating layer;
4. roasting behind the additional heating of the printing path;
5. roasting behind the printed silver brace; And
6. roasting after the printing protection seal coat.
The same with common manufacturing thick film element, each baking operation can be finished by the bakes to burn the article multilayer, and step 5 and 6 can be put upside down or make up.
Additional path can comprise miscellaneous part, for example above-mentioned we the described adjustable resistance control trajectory of UK Patent Application NO. with we GB-A-2 329 759 or GB-A-2 325 396 similarly be provided with the path that is connected in controller or indicating device on tap.Hole realization in the available intermediate insulating layer is connected with following path, and same similar setting is connected with the path of bimetallic spiral or other transducers.
Above-mentioned and other features of the present invention are seen below attached claim and can be known from following explanation in conjunction with the accompanying drawings and find out.
Description of drawings
Figure 1A-1E illustrates each step of making the present invention's one exemplary thick-film heating element; And
Fig. 2 is the perspective section view with a thick-film heating element of each step manufacturing of Figure 1A-1E.
Embodiment
Because the manufacturing of thick-film heating element is known, only sketch each manufacturing step below therefore.
Referring to each accompanying drawing, Figure 1A is illustrated on the surface of a stainless steel substrate 2 insulating barrier 1 is set.This insulating material for example is made of glass, pottery or glass ceramic material, and these materials can be as is known be added to back roasting on the substrate surface with Powdered.Figure 1B is illustrated in a main heating path 3 is set on the end face of insulating barrier 1, and this can for example use the print steps of conductive ink to carry out calcination steps realization subsequently with one.The form of noting path 3 shown in Figure 1B is exemplary.
Fig. 1 C is illustrated in an intermediate insulating layer 4 is set on the path 3, but the terminal part 5 and 6 of path 3 exposes in the window 7 that is arranged on layer 4.The part of main heating path 3 is exposed in second window 8, so that be connected with a thermal response controller (not shown).Fig. 1 D is illustrated on the end face of intermediate insulating layer 4 another heating element path 9 is set; Fig. 1 E is illustrated in another protection insulating barrier 10 is set on this heating element path 9; layer 10 is provided with window 11,12 and 13, respectively with intermediate insulating layer 4 in window 7 align and the terminal part 14 that exposes heating element path 9 with 15 and expose add heating element path 9 a part to be connected with another thermal response controller (not shown).
In the suitable stage in above-mentioned manufacture process, terminal part 5,6,14 and 15 is provided with the low resistance silver coating, and this coating also can be arranged on heating element path 3,9 as is known and be folded back onto on position on one's body, to avoid the current crowding phenomenon.
Fig. 2 is the perspective section view of the thick-film heating element as above made.Be noted that the thickness of each layer amplifies greatly in order to see clearly Chu Qijian.
Abovely the present invention has been described, but should have pointed out that this embodiment is exemplary in all respects, can make all remodeling and modification to this embodiment in the spirit and scope of the invention that is limited by appended claim in conjunction with a special embodiment.
Claims (10)
1. the thick-film heating element with sandwich construction wherein, is provided with the different heating path on different layers, separates with electrical insulating material between each layer.
2. thick-film heating element as claimed in claim 1, it comprises that one is provided with the metal substrate of an electric insulation layer, at least one heating path is set on this electric insulation layer, and wherein, the thickness of described electric insulation layer is than the electric insulation bed thickness on described at least one heating path.
3. thick-film heating element as claimed in claim 1 or 2 is characterized in that, window is set so that expose the terminal part of path in the one or more electric insulation layers that cover the heating path.
4. as claim 1 or 2 or 3 described thick-film heating elements, it is characterized in that, in one or more electric insulation layers of this element at least one window is set so that a thermal response controller is connected with at least one heating element path.
5. as the described thick-film heating element of above-mentioned arbitrary claim, it is characterized in that, a main heating path is being set on one deck and an additional heating path is set and the device of this additional path power output of an adjusting on another layer.
6. thick-film heating element as claimed in claim 5 is characterized in that, described Power Conditioning Unit comprises a resistive trace that is connected with described additional heating path, and described resistive trace is configured to its resistance can be by the adjusted of an associated controller.
7. one kind in conjunction with the roughly aforesaid thick-film heating element of each accompanying drawing.
8. liquid heat utensil that is equipped with as the described thick-film heating element of above-mentioned arbitrary claim.
9. liquid heat utensil as claimed in claim 8, it is characterized in that, it has boiled rapidly high power (for example 2-3kW) the heating path of a water and low-power (for example 6-700W) heating element of a heating milk, and milk can be not burnt on this heating element when heating milk for this element.
10. method of making a thick-film heating element comprises:
(i) preparation one metal (for example stainless steel) substrate;
(ii) on a surface of described substrate, an electric insulation layer is set;
The first heating path (iii) is set on described electric insulation layer;
(iv) on the described first heating path, second electric insulation layer is set;
(the second heating path is set on described second electric insulation layer v); And
(vi) on the described second heating path, the 3rd protection electric insulation layer is set;
Wherein, the window of the terminal part that exposes the described first and second heating paths is set so that to these path power supplies in the described second and the 3rd electric insulation layer.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB0013687A GB2363307A (en) | 2000-06-05 | 2000-06-05 | Thick film heating element stack |
| GB0013687.9 | 2000-06-05 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1446440A true CN1446440A (en) | 2003-10-01 |
| CN1214694C CN1214694C (en) | 2005-08-10 |
Family
ID=9893031
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN01813840.3A Expired - Fee Related CN1214694C (en) | 2000-06-05 | 2001-05-25 | Improvenments relating to electric heating elements |
Country Status (7)
| Country | Link |
|---|---|
| EP (1) | EP1290917B1 (en) |
| CN (1) | CN1214694C (en) |
| AT (1) | ATE279846T1 (en) |
| AU (1) | AU2001260456A1 (en) |
| DE (1) | DE60106440T2 (en) |
| GB (1) | GB2363307A (en) |
| WO (1) | WO2001095670A1 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE20218792U1 (en) * | 2001-12-05 | 2003-04-30 | Strix Ltd | Heaters with several power levels |
| US8680443B2 (en) | 2004-01-06 | 2014-03-25 | Watlow Electric Manufacturing Company | Combined material layering technologies for electric heaters |
| JP6054382B2 (en) | 2011-06-16 | 2016-12-27 | レスメド・リミテッドＲｅｓＭｅｄ Ｌｉｍｉｔｅｄ | Humidifier and layered heating element |
| US11225001B2 (en) * | 2018-04-25 | 2022-01-18 | Matriq Ag | Mold and device for marking work pieces |
| GB2618803A (en) * | 2022-05-17 | 2023-11-22 | Dyson Technology Ltd | Thick film heating elements |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2153190B (en) * | 1984-01-14 | 1987-09-09 | Emi Ltd | Improvements in or relating to heaters for water vessels |
| DE3810586A1 (en) * | 1988-03-29 | 1989-10-12 | Ego Elektro Blanc & Fischer | Heating system for electric cooking appliances |
| US5157240A (en) * | 1989-09-13 | 1992-10-20 | Chow Loren A | Deposition heaters |
| GB9211331D0 (en) * | 1992-05-28 | 1992-07-15 | Chinacraft Ltd | Hot plate for food |
| DE4338539A1 (en) * | 1993-11-11 | 1995-05-18 | Hoechst Ceram Tec Ag | Method of making ceramic heating elements |
| GB9423900D0 (en) * | 1994-11-26 | 1995-01-11 | Pifco Ltd | Improvements to thick film elements |
-
2000
- 2000-06-05 GB GB0013687A patent/GB2363307A/en not_active Withdrawn
-
2001
- 2001-05-25 EP EP01934150A patent/EP1290917B1/en not_active Expired - Lifetime
- 2001-05-25 WO PCT/GB2001/002358 patent/WO2001095670A1/en active IP Right Grant
- 2001-05-25 DE DE60106440T patent/DE60106440T2/en not_active Expired - Fee Related
- 2001-05-25 AT AT01934150T patent/ATE279846T1/en not_active IP Right Cessation
- 2001-05-25 CN CN01813840.3A patent/CN1214694C/en not_active Expired - Fee Related
- 2001-05-25 AU AU2001260456A patent/AU2001260456A1/en not_active Abandoned
Also Published As
| Publication number | Publication date |
|---|---|
| EP1290917B1 (en) | 2004-10-13 |
| DE60106440T2 (en) | 2006-03-02 |
| DE60106440D1 (en) | 2004-11-18 |
| CN1214694C (en) | 2005-08-10 |
| GB2363307A (en) | 2001-12-12 |
| WO2001095670A1 (en) | 2001-12-13 |
| AU2001260456A1 (en) | 2001-12-17 |
| ATE279846T1 (en) | 2004-10-15 |
| EP1290917A1 (en) | 2003-03-12 |
| GB0013687D0 (en) | 2000-07-26 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20050810 |