CN1097831C - Sensistor and sensistor device - Google Patents
Sensistor and sensistor device Download PDFInfo
- Publication number
- CN1097831C CN1097831C CN97119239A CN97119239A CN1097831C CN 1097831 C CN1097831 C CN 1097831C CN 97119239 A CN97119239 A CN 97119239A CN 97119239 A CN97119239 A CN 97119239A CN 1097831 C CN1097831 C CN 1097831C
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- semistor
- electrode
- broach shape
- thermosensitive resistor
- shape electrode
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- 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
-
- 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
- H05B2203/002—Heaters using a particular layout for the resistive material or resistive elements
- H05B2203/006—Heaters using a particular layout for the resistive material or resistive elements using interdigitated electrodes
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- Thermistors And Varistors (AREA)
- Resistance Heating (AREA)
Abstract
To realize easy positioning of a comb-like electrode and good heat dissipation efficiency by making a first comb-like electrode and a second comb-like electrode face each other in a thickness direction of a positive characteristic thermistor element assembly. A first comb-like electrode 15 formed in an upper surface of a thermistor element assembly 2 and a second comb-like electrode 18 formed in a lower surface thereof are made to face each other sandwitching the thermistor element assembly 2. Similarly, a second comb-like electrode 17 in an upper surface and a first comb-like electrode 16 in a lower surface face each other sandwitching the thermistor element assembly 2. When a voltage is applied between the first and second comb-like electrodes 15 to 18 of a positive characteristic thermistor 11 of such a constitution, heat is generated between the first and second comb-like electrodes 15, 17 in an upper surface and between the first and second comb-like electrodes 16, 18 in a lower surface. Heat is also generated between electrodes which face each other in a thickness (t) direction of the thermistor element assembly 2. In this case, even if a position of the first comb-like electrode 15 is shifted relevant to an electrode width (w), a minimum distance between the first and second comb-like electrodes 15, 18 is a thickness (t) and the heat generation state is stable.
Description
The semistor with broach shape electrode and the positive temperature that the present invention relates to use as heater thermals source such as hot air heater, humidifier and inhalators are thermistor apparatus.
As prior art, if any the semistor of describing in real public clear 58-50632 number.Below, with reference to Fig. 7～Fig. 9 this class semistor is described.
Semistor 1, be formed with the first side electrode 3 in the relative a pair of side of tabular thermistor element body 2 and reach second side electrode 4, be formed with the first broach shape electrode 5a, 5b and the second broach shape electrode 6a, the 6b of the broach shape of predetermined space on two surfaces of thermistor element body 2 separately by above-mentioned first and second side electrode 3,4 with resistance temperature characteristic.
As shown in Figure 9, the comb teeth part separately of the above-mentioned first broach shape electrode 5a, 5b and the second broach shape electrode 6a, 6b, dispose to such an extent that make first broach shape electrode 5a that is formed at thermistor element body 2 upper surfaces and the relative mutually thermistor element body 2 that clips of the first broach shape electrode 5b that is formed at lower surface, equally, the second broach shape electrode 6a and 6b also clip thermistor element body 2 mutually relatively mutually.
Between the first broach shape electrode 5a, the 5b and the second broach shape electrode 6a, 6b of the semistor 1 of said structure, in case apply voltage, then reaching semistor 1 heating between first and second broach shape electrode of lower surface 5b, 6b between first and second broach shape electrode 5a, the 5b of upper surface.And then, generating heat between relative first and second broach shape electrode 5a, 6b and between 5b, 6a on the oblique thick direction of thermistor element body 2.
As another prior art example, the semistor if any describing in real public clear 55-53108 number is illustrated it below with reference to Figure 10.
Semistor 1a forms a pair of relative first broach shape electrode 5a, 5b and the second broach shape electrode 6a, 6b on two planes of its tabular thermistor element body 2.
The electrode of comparative electrode on thermistor element body 2 thickness directions will be constituted, the i.e. first broach shape electrode 5a and the second broach shape electrode 6b, and the first broach shape electrode 5b and the second broach shape electrode 6a, staggering mutually on thermistor element body 2 oblique thick directions is provided with the first broach shape electrode 5a, 5b and the second broach shape electrode 6a, 6b respectively.
Between the first broach shape electrode 5a, the 5b and the second broach shape electrode 6a, 6b of the semistor 1a of said structure, in case be added with voltage, then semistor 1a is generating heat between first and second broach shape electrode 5a, the 6a of upper surface and between first and second broach shape electrode 5b, the 6b of lower surface.And then, generating heat between relative first and second broach shape electrode 5a, 6b and between 5b, 6a on the oblique thick direction of thermistor element body 2.
But, in the semistor 1 of above-mentioned formation, 1a, between thermistor element body 2 thickness t directions relative first and second broach shape electrode 5a, 6b and 5b, 6a, since relative in thermistor element body 2 oblique thick directions, so first and second broach shape interelectrode distance d1, d2 are greater than the thickness t of thermistor element body 2.Have, if the formation position of broach shape electrode is out of position again, and then interelectrode distance d1, d2 can change thereupon.Therefore, the heating efficiency of semistor 1,1a descends.In addition, the decline of the voltage endurance of thermistor 1,1a thereupon loses the balance of voltage in the element body 2, the problem that also exists heating efficiency to descend.
Also have a problem, promptly in order to make first and second broach shape electrode, it is surperficial with two kinds of electrode patterns also must to prepare thermistor element body 2 one side surfaces usefulness and opposite side respectively.
The present invention is in order to overcome the problems referred to above, even its purpose is to provide two some position deviations of surface electrode figure of thermistor element body also can not make heating efficiency descend, also can form on two surfaces with a kind of electrode pattern the semistor and the positive temperature coefficient thermosensitive resistor devices of broach shape electrodes.
For achieving the above object, semistor of the present invention has: tabular thermosensitive resistor with positive temp coefficient body; Be formed on the first side electrode and the first broach shape electrode that is formed on two surfaces of described thermosensitive resistor with positive temp coefficient body and links to each other of described thermosensitive resistor with positive temp coefficient body one side with described the first side electrode; Be formed on second side electrode and the second broach shape electrode that is formed on two surfaces of described thermosensitive resistor with positive temp coefficient body and links to each other of the another side relative of described thermosensitive resistor with positive temp coefficient body with a described side with described second side electrode; At the above first and second broach shape electrode of thickness direction of described thermosensitive resistor with positive temp coefficient opposite one another.
Have again, be formed at the distance that adjoins each other of the first broach shape electrode and the second broach shape electrode of described thermosensitive resistor with positive temp coefficient surface, preferably be substantially equal to the thickness of described thermosensitive resistor with positive temp coefficient body.
Positive temperature coefficient thermosensitive resistor device of the present invention, on its two surfaces of tabular semistor insulating element and thermal component are set respectively, the a pair of side relative at described semistor is provided with power supply part, described semistor has tabular thermosensitive resistor with positive temp coefficient body, be formed on the first side electrode and the first broach shape electrode that is formed on two surfaces of described thermosensitive resistor with positive temp coefficient body and links to each other of described thermosensitive resistor with positive temp coefficient body one side with described the first side electrode, and second side electrode and the second broach shape electrode that is formed on two surfaces of described thermosensitive resistor with positive temp coefficient body and links to each other that are formed on the another side relative of described thermosensitive resistor with positive temp coefficient body with described second side electrode with a described side, at the above first and second broach shape electrode of thickness direction of described thermosensitive resistor with positive temp coefficient opposite one another
Described insulating element is because between described semistor and thermal component, so described semistor of electrical isolation and thermal component, and heat conducted to hot thermal component from described semistor, described thermal component is covered in the surface of described insulating element, the heat that described semistor is sent dispels the heat, described power supply part is electrically connected with a pair of side electrode of described semistor respectively, and this semistor is given in power supply.
Have again, be formed at the distance that adjoins each other of the first broach shape electrode and the second broach shape electrode of described thermosensitive resistor with positive temp coefficient surface, preferably be substantially equal to the thickness of described thermosensitive resistor with positive temp coefficient body.
Also have the retainer that keeps described semistor and the face corresponding to be opening from the side with two surfaces of the quick resistance of described positive temperature coefficient.
Preferably, described retainer and described power supply part constitute one, one end of this power supply part reaches the second broach shape electrode through a pair of side electrode of described semistor and described first and is electrically connected, and the other end of described power supply part is as outside terminal for connecting.
By being arranged at the mutual stressed joint of described thermal component of two face side of described semistor, described semistor, insulating element and thermal component are fixed.
Be preferably in and be added with the heat conduction agent between described semistor, insulating element and thermal component.
Therefore, the position of broach shape electrode relative between two surfaces of thermistor element is aimed at easily, can be obtained high semistor of heating efficiency and positive temperature coefficient thermosensitive resistor device.
Summary of drawings
Fig. 1 is the stereogram of the present invention's one example semistor;
Fig. 2 is the stereogram from semistor beneath shown in Figure 1;
Fig. 3 is for cutting the longitudinal section of semistor shown in Figure 1 open from length direction;
Fig. 4 is the partial enlarged drawing of the state that staggers on two surfaces for broach shape electrode in the profile shown in Figure 3;
Fig. 5 is the stereogram of the present invention's one example positive temperature coefficient thermosensitive resistor device;
Fig. 6 is the exploded perspective view of device shown in Figure 5;
Fig. 7 is the stereogram of the semistor of prior art example;
Fig. 8 is the stereogram from resistance beneath shown in Figure 7;
Fig. 9 is for cutting the sectional arrangement drawing of resistance shown in Figure 7 along its length open;
Figure 10 is the sectional arrangement drawing of the semistor of another prior art example.
Below, describe semistor one example of the present invention in detail with reference to Fig. 1～Fig. 4.Wherein, compose with same label with the same section of prior art example, and omit its detailed description.
Semistor (below abbreviate " PTC thermistor " as) 11, on the opposite flank of tabular thermistor element body 2, be formed with the first side electrode 3 and second side electrode 4, be formed with the first broach shape electrode 15,16 and the second broach shape electrode 17,18 of the broach shape that is provided at predetermined intervals again respectively by this first and second side electrode 3,4 on 2 two surfaces of thermistor element body with resistance temperature characteristic.These first and second side electrodes 3,4 and the first and second broach shape electrodes, 15～18 usefulness metal ohmic contacts or alloy are made.As for sintering process available silver, aluminium; Can use aluminium for metallikon; Can use nickel for galvanoplastic.Under with the nickel electrode situation, also be welded with silver electrode on its that has, so that can add high current capacity.If it is it is thicker that the thickness of first and second side electrode 3,4 is obtained, then just stable with being electrically connected of first and second broach shape electrode 15～18.
Each comb teeth part of the above-mentioned first broach shape electrode 15,16 and the second broach shape electrode 17,18 disposes as shown in Figure 3, make the second broach shape electrode, the 18 relative mutually thermistor element bodies 2 of clamping that the first broach shape electrode 15 that thermistor element body 2 upper surfaces form and lower surface form, equally, the first broach shape electrode, the 16 relative mutually thermistor element bodies 2 of clamping of second broach shape electrode 17 of upper surface formation and lower surface formation.
In a single day the first broach shape electrode 15,16 and 17,18 at the second broach shape electrode at the PTC of above-mentioned formation thermistor 11 apply voltage, then PTC thermistor 11 is in 16,18 heatings of first and second broach shape electrode of 15,17 at first and second broach shape electrode and the lower surface of upper surface.And then 15,18 and 16,17 relative at first and second broach shape electrode also generates heat on thermistor element body 2 thickness t directions.
In PTC thermistor 11, relative first and second broach shape electrode is t as 15,18 interelectrode distance on the thermistor element body 2 thickness t directions.At this moment, the position of the first broach shape electrode 15 as shown in Figure 4, be equivalent to comb teeth part electrode widths W even depart to the right, also owing to beeline between first and second broach shape electrode 15,18 electrodes, be that distance is t between first and second broach shape electrode 15,18 opposed end 15a, 18a, so febrile state is stable.
Be formed at the distance h that distance h that same lip-deep first and second broach shape electrode 15,17 adjoins each other and first, second broach shape electrode 16,18 adjoin each other if when equaling the thickness t of thermistor element body 2 substantially, then heating and the heating in the thickness direction inside in 11 two surfaces of PTC thermistor is basic identical, so can obtain maximum output.
Below, describe an example of PTC thermistor apparatus of the present invention in detail with reference to Fig. 5, Fig. 6.But omit detailed description to PTC thermistor 11 in the above-mentioned example.
Insulating element 22,23 is a plate body, be covered in the first and second broach shape electrodes, 15～18 surfaces of PTC thermistor 11 correspondences, its matter material can be made of the insulator with thermal conductive resin and high-fire resistance as potteries such as rubber-like silicones etc. or aluminium oxide.Also promptly, electric insulation is carried out on the one the second broach shape electrode 15～18 surfaces of 22,23 pairs of PTC thermistors 11 of insulating element, and the heat that PTC thermistor 11 sends is conducted to thermal component 24,25.
First and second thermal components 24,25 are tabular or box-like, and its matter material can be made of the good metal of heat conduction such as aluminium.Be covered in PTC thermistor 11 surfaces, accompany insulating element 22,23 therebetween, and the heat that PTC thermistor 11 is sent distributes from its outer surface through insulation parts 22,23.
The end of first thermal component 24 has and is used for first through hole 27,28,29 that power supply part 31,32,33 passes; Its surrounding edge partly is formed with a plurality of (among the figure being 8) second through hole 37.
Second thermal component 25 partly is formed with a plurality of the 3rd through holes 38 corresponding to second through hole 37 at its surrounding edge, its surrounding edge partly also vertically is provided with a plurality of (among the figure being 4) tongue piece 39, behind first thermal component, 24 aligned positions, with tongue piece 39 bendings, thereby can be fixed into one with first thermal component 24.
The PTC thermistor apparatus 21 of said structure constitutes like this, PTC thermistor 11 is filled in the opening 30 of retainer 26, add heat conduction good as loading onto insulating element 22,23 after the heat conduction agent (not shown) such as silicone grease, and then add superimposed first and second thermal components 24,25 of heat conduction agent (not shown).At this moment, first and second thermal component 24,25 is determined the position by tongue piece 39, be located at projection 34,35,36 corresponding first through holes 27,28,29 that pass first thermal component 24 of retainer 26, each other end of power supply part 31,32,33 is exposed to the top of first thermal component 24 from projection 34,35,36 central portions.Keep this state, will be located at tongue piece 39 bendings of second thermal component 25, thereby be fixed as one with first thermal component 24.
Embodiment
Prepare the thermistor element body 2 of long 33 * wide by 22 * thick 1.0mm, make first and second side electrode 3,4 and make each first and second broach shape electrode 15～18 of 15 on 2 two surfaces of thermistor element body respectively, make PTC thermistor element body 11 shown in Figure 1.
Then, as shown in Figure 6, the aluminium oxide of superimposed respectively 50 * 50 * 0.65mm that is provided as insulating element and on the broach shape electrode surface on 11 two surfaces of PTC thermistor as the aluminium sheet of 70 * 70 * 1.5mm of thermal component, thus the PTC thermistor apparatus of embodiment 1 obtained.In the PTC of embodiment 1 thermistor apparatus.Further silicone grease is added in respectively between PTC thermistor 11 surfaces and the insulating element and insulating element and thermal component between, thereby obtain the PTC thermistor apparatus of embodiment 2.
Each PTC thermistor 11 in the PTC thermistor apparatus of embodiment 1.2 is applied voltage 100V, measures its power, with outcome record in table 1.
[table 1]
| Power (W) | Power ratio % to comparative example 1 | |
| Embodiment 1 | 277.6 | 125.9 |
| | 384.7 | 174.5 |
| Comparative example 1 | 220.5 | -- |
| Comparative example 2 | 235.6 | 106.8 |
As a comparative example, use the thermistor element body 2 identical to make following two kinds of PTC thermistors with embodiment.
Quote Fig. 1 comparative example 1 PTC thermistor is described.Thermistor element body 2 is formed first and second side electrode 3,4 and form each first and second broach shape electrode 15,17 of 15 on thermistor element body 2 one side surfaces, thereby obtain comparative example 1 PTC thermistor.
As shown in Figure 9, form each first and second broach shape electrode 5a, 5b, 6a, 6b of 15 to thermistor element body 2 first and second side electrodes 3,4 of formation with on 2 two surfaces of thermistor element body respectively, thereby obtain comparative example 2 PTC thermistor.
Above-mentioned each PTC thermistor is provided with embodiment 1 used insulating element and thermal component, makes comparative example 1.The same with embodiment 2, silicone grease is added respectively between the PTC thermistor surface and insulating element and thermal component of comparative example 1, thereby obtain comparative example 2.With measuring the power of comparative example 1,2 with the same condition of embodiment 1,2, its result also is recorded in table 1.Also record the power ratio of comparative example 2,1,2 pairs of comparative examples 2 of embodiment in the table 1.
As seen from Table 1, the PTC thermistor of the embodiment of the invention 1, its output than comparative example 1,2, big, even onesize PTC thermistor also can obtain higher output.Have again, have the embodiment 2PTC thermistor apparatus of heat conduction agent, have good heat conduction through insulation parts to thermal component, higher output is arranged than embodiment 1 from the PTC thermistor.
PTC thermistor and the PTC thermistor apparatus that the present invention relates to are not limited to above-mentioned example, can do the variation of all examples in its essential scope.For example, though each other end of power supply part 31,32,33 is arranged on the top of first thermal component 24, also can be arranged on the side of 24,25 of first and second thermal components.Though be added with the heat conduction agent respectively at PTC thermistor 11 and insulating element 22,23 and 24,25 of first and second thermal components, heat conduction can be less situation under, also can omit it.In addition, the quantity that is used for the PTC thermistor of PTC thermistor apparatus also is not limited to 2.
As mentioned above, PTC thermistor of the present invention is owing to first and second broach shape electrode that will be formed at two surfaces of thermistor element body disposes to such an extent that make second comb electrode relative with the first broach shape electrode on thermistor element body thickness direction, so can obtain big output, and can obtain stable output.Owing to there is no need to be strict with figure (pattern) precision of first and second broach shape electrode, make easily.Have, the figure that is formed at first and second broach shape electrode on two surfaces of PTC thermistor can be identical again.
PTC thermistor apparatus of the present invention is owing to using above-mentioned PTC thermistor and from the power supply of thermistor element body side surface, exporting so can obtain height from two surfaces of PTC thermistor.Owing between thermistor element body, insulating element and thermal component, be added with the heat conduction agent, so can obtain bigger output.
Claims (11)
1. semistor has:
Tabular thermosensitive resistor with positive temp coefficient body;
Be formed on the first side electrode and the first broach shape electrode that is formed on two surfaces of described thermosensitive resistor with positive temp coefficient body and links to each other of described thermosensitive resistor with positive temp coefficient body one side with described the first side electrode;
Be formed on second side electrode and the second broach shape electrode that is formed on two surfaces of described thermosensitive resistor with positive temp coefficient body and links to each other of the another side relative of described thermosensitive resistor with positive temp coefficient body with a described side with described second side electrode;
It is characterized in that, opposite one another at the above first and second broach shape electrode of described thermosensitive resistor with positive temp coefficient body thickness direction.
2. thermistor as claimed in claim 1 is characterized in that, the distance that adjoins each other that is formed at first, second broach shape electrode of described thermosensitive resistor with positive temp coefficient surface is substantially equal to the thickness of described thermosensitive resistor with positive temp coefficient body.
3. a positive temperature coefficient thermosensitive resistor device is characterized in that, is provided with insulating element and thermal component separately on two surfaces of tabular semistor, and a pair of side relative at described semistor is provided with power supply part,
Described semistor has tabular thermosensitive resistor with positive temp coefficient body, be formed on the first side electrode and the first broach shape electrode that is formed on two surfaces of described thermosensitive resistor with positive temp coefficient body and links to each other of described thermosensitive resistor with positive temp coefficient body one side with described the first side electrode, and second side electrode and the second broach shape electrode that is formed on two surfaces of described thermosensitive resistor with positive temp coefficient body and links to each other that are formed on the another side relative of described thermosensitive resistor with positive temp coefficient body with described second side electrode with a described side, at the above first and second broach shape electrode of thickness direction of described thermosensitive resistor with positive temp coefficient opposite one another
Described insulating element between described semistor and thermal component, described semistor of electrical isolation and thermal component, and carry out heat conduction to thermal component from described semistor,
Described thermal component is covered in the surface of described insulating element, and distributes the heat from described semistor,
Described power supply part is electrically connected in a pair of side electrode of described semistor respectively, gives described semistor power supply.
4. device as claimed in claim 3 is characterized in that, the distance that adjoins each other that is formed at first, second broach shape electrode of described thermosensitive resistor with positive temp coefficient surface is substantially equal to the thickness of described thermosensitive resistor with positive temp coefficient body.
5. device as claimed in claim 3 is characterized in that, can further have retainer, and this retainer maintains it from the side surface direction of described semistor, and in the face upper shed corresponding to two surfaces of described positive temperature coefficient resistor.
6. device as claimed in claim 4 is characterized in that, can further have retainer, and this retainer maintains it from the side surface direction of described semistor, and in the face upper shed corresponding to two surfaces of described positive temperature coefficient resistor.
7. device as claimed in claim 5, it is characterized in that, described retainer and described power supply part constitute one, one end of described power supply part is electrically connected in described first and second broach shape electrode through a pair of side electrode of described semistor, and the other end of described power supply part is as outside link.
8. device as claimed in claim 6, it is characterized in that, described retainer and described power supply part constitute one, one end of described power supply part is electrically connected in described first and second broach shape electrode through a pair of side electrode of described semistor, and the other end of described power supply part is as outside link.
9. as the described device of the arbitrary claim of claim 3～8, it is characterized in that, be close to connection mutually by the described thermal component that will be arranged at described semistor two surfaces, described semistor, insulating element and thermal component are fixed.
10. as the described device of the arbitrary claim of claim 3～8, it is characterized in that, between described semistor, insulating element and thermal component, be added with the heat conduction agent.
11. device as claimed in claim 9 is characterized in that, is added with the heat conduction agent between described semistor, insulating element and thermal component.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8279520A JP3060968B2 (en) | 1996-10-22 | 1996-10-22 | Positive characteristic thermistor and positive characteristic thermistor device |
| JP279520/96 | 1996-10-22 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1180907A CN1180907A (en) | 1998-05-06 |
| CN1097831C true CN1097831C (en) | 2003-01-01 |
Family
ID=17612178
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN97119239A Expired - Fee Related CN1097831C (en) | 1996-10-22 | 1997-09-26 | Sensistor and sensistor device |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP3060968B2 (en) |
| KR (1) | KR100271574B1 (en) |
| CN (1) | CN1097831C (en) |
| TW (1) | TW386232B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100495133B1 (en) * | 2002-11-28 | 2005-06-14 | 엘에스전선 주식회사 | PTC Thermister |
| KR100694383B1 (en) | 2003-09-17 | 2007-03-12 | 엘에스전선 주식회사 | Surface Mounted Type Thermistor |
| TWI645425B (en) * | 2016-12-29 | 2018-12-21 | 弈禔股份有限公司 | Polymeric positive temperature coefficient element |
| CN113845179B (en) * | 2019-08-06 | 2023-05-30 | 无锡小天鹅电器有限公司 | Electrolysis assembly and clothes treatment equipment |
| CN110829733B (en) * | 2019-10-24 | 2022-02-01 | 珠海凯邦电机制造有限公司 | Control panel, motor and air conditioning system |
| US11570852B2 (en) * | 2020-10-15 | 2023-01-31 | Littelfuse, Inc. | PPTC heating element having varying power density |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4162395A (en) * | 1975-11-07 | 1979-07-24 | Murata Manufacturing Co., Ltd. | Heating unit for heating fluid |
| US5006696A (en) * | 1988-08-26 | 1991-04-09 | Murata Manufacturing Co., Ltd. | Face-like heating device |
| CN1123063A (en) * | 1994-01-31 | 1996-05-22 | 日本钨合金株式会社 | Flat PTC heater and resistance value regulating method for the same |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6357701A (en) * | 1986-08-28 | 1988-03-12 | Toshiba Corp | Furnace parts |
-
1996
- 1996-10-22 JP JP8279520A patent/JP3060968B2/en not_active Expired - Fee Related
-
1997
- 1997-08-20 TW TW086111901A patent/TW386232B/en not_active IP Right Cessation
- 1997-09-26 CN CN97119239A patent/CN1097831C/en not_active Expired - Fee Related
- 1997-10-22 KR KR1019970054135A patent/KR100271574B1/en not_active IP Right Cessation
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4162395A (en) * | 1975-11-07 | 1979-07-24 | Murata Manufacturing Co., Ltd. | Heating unit for heating fluid |
| US5006696A (en) * | 1988-08-26 | 1991-04-09 | Murata Manufacturing Co., Ltd. | Face-like heating device |
| CN1123063A (en) * | 1994-01-31 | 1996-05-22 | 日本钨合金株式会社 | Flat PTC heater and resistance value regulating method for the same |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1180907A (en) | 1998-05-06 |
| TW386232B (en) | 2000-04-01 |
| KR100271574B1 (en) | 2000-11-15 |
| KR19980033047A (en) | 1998-07-25 |
| JPH10125505A (en) | 1998-05-15 |
| JP3060968B2 (en) | 2000-07-10 |
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