JPS638376Y2 - - Google Patents
Info
- Publication number
- JPS638376Y2 JPS638376Y2 JP1982083984U JP8398482U JPS638376Y2 JP S638376 Y2 JPS638376 Y2 JP S638376Y2 JP 1982083984 U JP1982083984 U JP 1982083984U JP 8398482 U JP8398482 U JP 8398482U JP S638376 Y2 JPS638376 Y2 JP S638376Y2
- Authority
- JP
- Japan
- Prior art keywords
- heater
- ceramic heater
- cover
- ceramic
- temperature
- 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.)
- Expired
Links
- 239000000919 ceramic Substances 0.000 claims description 34
- 238000010438 heat treatment Methods 0.000 claims description 13
- 239000007788 liquid Substances 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 18
- 239000012530 fluid Substances 0.000 description 4
- 230000035939 shock Effects 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
Landscapes
- Cookers (AREA)
- Resistance Heating (AREA)
- Thermally Insulated Containers For Foods (AREA)
Description
【考案の詳細な説明】
この考案は電気湯沸器などの加熱器の改良に関
する。[Detailed description of the invention] This invention relates to improvement of heaters such as electric water heaters.
セラミツクヒータを加熱素子として用いた電気
湯沸器は、従来は、セラミツクヒータの加熱面が
容器内で何の仕切板もなく設置されていた。この
ため容器内の全水量がセラミツクヒータの熱負荷
となり、いいかえるとセラミツクヒータの発生熱
量に対する負荷が大きくなるために、セラミツク
ヒータ自身の温度は加熱されるべき水の温度に比
して高くなり、したがつて、セラミツクヒータに
大きな熱的衝撃が加わることになり、セラミツク
ヒータにクラツク等が生じやすいという欠点があ
つた。 Conventionally, in an electric water heater using a ceramic heater as a heating element, the heating surface of the ceramic heater was installed within a container without any partition plate. Therefore, the total amount of water in the container becomes a heat load on the ceramic heater, and in other words, the load on the amount of heat generated by the ceramic heater increases, so the temperature of the ceramic heater itself becomes higher than the temperature of the water to be heated. Therefore, a large thermal shock is applied to the ceramic heater, resulting in a drawback that cracks are likely to occur in the ceramic heater.
この考案は上述の欠点を除くためになされたも
のであつて、セラミツクヒータの上部にカバーを
かぶせることにより、セラミツクヒータが負担す
べき負荷の熱的容量を限定して、該セラミツクヒ
ータの温度とその周囲の流体の温度との差を低減
し、セラミツクヒータの熱的衝撃による破損を軽
減できるようにした加熱器を提供することを目的
とするものである。 This invention was made in order to eliminate the above-mentioned drawbacks, and by covering the top of the ceramic heater with a cover, the thermal capacity of the load to be borne by the ceramic heater is limited, and the temperature of the ceramic heater is reduced. It is an object of the present invention to provide a heater that can reduce the difference in temperature between the ceramic heater and the surrounding fluid and reduce damage to the ceramic heater due to thermal shock.
以下にこの考案の一実施例を図面とともに説明
する。 An embodiment of this invention will be described below with reference to the drawings.
第１図において、１は電気湯沸器、２は加熱容
器、３は加熱容器２の底面に適宜な間隔をおいて
固定された、たとえば円板状のセラミツクヒータ
である。該セラミツクヒータ３の上面が主加熱面
となつている。 In FIG. 1, 1 is an electric water heater, 2 is a heating container, and 3 is, for example, a disk-shaped ceramic heater fixed to the bottom of the heating container 2 at an appropriate interval. The upper surface of the ceramic heater 3 serves as the main heating surface.
４はセラミツクヒータ３に覆着されたステンレ
ス板等にてなるヒータカバーであり、このヒータ
カバー４によつて、セラミツクヒータ３の上側に
小さな室５が形成されるようになつている。 Reference numeral 4 denotes a heater cover made of a stainless steel plate or the like that covers the ceramic heater 3, and a small chamber 5 is formed above the ceramic heater 3 by the heater cover 4.
ヒータカバー４は第２図ないし第６図に示すよ
うに概略逆皿形状を有し、その天井面６には放射
方向に複数本の間隙７を形成し、その間隙７を通
して室５の内外に水が流通し得るようにしてい
る。 The heater cover 4 has a generally inverted dish shape as shown in FIGS. 2 to 6, and has a plurality of gaps 7 formed in the radial direction on its ceiling surface 6, through which the inside and outside of the room 5 are connected. Allows water to circulate.
この間隙７は第５図と第６図に示すように、天
井面６を放射方向の線に沿つて切り、かつその一
部を下方に向て折曲して段差９，９′を形成して
構成したものである。 As shown in FIGS. 5 and 6, this gap 7 is formed by cutting the ceiling surface 6 along a line in the radial direction and bending a part of it downward to form steps 9, 9'. It is composed of
またヒータカバー４の側周面には複数個の開口
１０を形成しており、またその側周面の一部で舌
片１１を内方に、かつ自由端が上向きとなるよう
に折曲している。そしてこのヒータカバー４をセ
ラミツクヒータ３にかぶせると、該ヒータカバー
４の側周内面がセラミツクヒータ３の外面にほぼ
密着するとともに、舌片１１の自由端がセラミツ
クヒータ３の周縁部の下面に弾力的に係合して、
ヒータカバー４がセラミツクヒータ３に固定され
る。 In addition, a plurality of openings 10 are formed on the side circumferential surface of the heater cover 4, and a tongue piece 11 is bent inward at a part of the side circumferential surface so that the free end faces upward. ing. When this heater cover 4 is placed over the ceramic heater 3, the side peripheral inner surface of the heater cover 4 comes into close contact with the outer surface of the ceramic heater 3, and the free end of the tongue piece 11 is elastically pressed against the lower surface of the peripheral edge of the ceramic heater 3. engage with
A heater cover 4 is fixed to the ceramic heater 3.
上記のようにして加熱容器２内に所定量の水を
貯留してセラミツクヒータ３に通電して加熱する
と、その熱により、室５にある水が加熱される。
なお水はヒータカバー４の開口７から室５内に流
入する。この場合、室５の容積は小さいので、室
５内の水の熱容量も比較的小さく、したがつて、
室５内の水は急速にセラミツクヒータ３の温度近
くまで加熱される。なお加熱された水は別の開口
７を通つて加熱容器２内に流入し、その代りに低
温の水が室５内に流入して、加熱容器２内の水の
加熱が行なわれる。 When a predetermined amount of water is stored in the heating container 2 as described above and heated by energizing the ceramic heater 3, the water in the chamber 5 is heated by the heat.
Note that water flows into the chamber 5 through the opening 7 of the heater cover 4. In this case, since the volume of chamber 5 is small, the heat capacity of the water in chamber 5 is also relatively small, and therefore,
The water in the chamber 5 is rapidly heated to a temperature close to that of the ceramic heater 3. Note that the heated water flows into the heating container 2 through another opening 7, and instead, low-temperature water flows into the chamber 5 to heat the water in the heating container 2.
加熱の状態をグラフで表わすと、第７図と第８
図に示すようになる。即ちヒータカバー４の存在
によりヒータ３への通電直後ヒータ表面温度の上
昇に追随してヒータカバー４内の水温が急上昇
し、ヒータ３に対する熱衝撃が軽減されることが
理解できる。 If the heating state is represented graphically, Figures 7 and 8
The result will be as shown in the figure. That is, it can be understood that due to the presence of the heater cover 4, the water temperature within the heater cover 4 rises rapidly following the rise in the heater surface temperature immediately after the heater 3 is energized, and the thermal shock to the heater 3 is reduced.
なお第７図はヒータカバー有のときのグラフで
Ａはヒータ３の表面温度Ｂはヒータカバー４内の
水温である。第８図はヒータカバーなしのときの
グラフであり、A′はヒータ表面温度、B′はヒー
タ周辺の水温である。また開口１０が形成されて
いるので、セラミツクヒーターの裏面に発生した
気泡はすみやかに開口１０より放出されるように
なつている。 Note that FIG. 7 is a graph when the heater cover is present, and A is the surface temperature of the heater 3 and B is the water temperature inside the heater cover 4. FIG. 8 is a graph without a heater cover, where A' is the heater surface temperature and B' is the water temperature around the heater. Further, since the opening 10 is formed, air bubbles generated on the back surface of the ceramic heater are quickly released from the opening 10.
以上のように、この考案はセラミツクヒータに
ヒータカバーを設けて、セラミツクヒータに加わ
る熱容量を小さくすることにより、該セラミツク
ヒータ周辺の流体を急速に加熱して、セラミツク
ヒータの加熱面と流体との温度差を低減するよう
にしたから、セラミツクヒータのクラツクの発
生、ヒータの断線等を防止し、セラミツクヒータ
の長寿命化を図ることができる。またセラミツク
ヒータの上側に所定内容積を有するヒータカバー
を覆せるとともにヒータカバーの天井面には半径
方向に延在する複数条の間隙にてなる液体流通用
の開口を設けたから上記効果に加えて、ヒータで
加熱されたヒータカバー内の液体をカバーの天井
から放出することによりセラミツクヒータ温度
に、すみやかに追従して容器内の液体を昇温し得
るといる利点を有する。なおこの考案は電気湯沸
し器には限らず、他の流体の加熱器にも適用でき
る。 As described above, this invention provides a heater cover on the ceramic heater to reduce the heat capacity applied to the ceramic heater, thereby rapidly heating the fluid around the ceramic heater, and thereby increasing the contact between the heating surface of the ceramic heater and the fluid. Since the temperature difference is reduced, cracks in the ceramic heater, breakage of the heater, etc. can be prevented, and the life of the ceramic heater can be extended. In addition, the heater cover having a predetermined internal volume can be covered above the ceramic heater, and the ceiling surface of the heater cover is provided with openings for liquid circulation consisting of multiple gaps extending in the radial direction, which provides the above effects. This has the advantage that by discharging the liquid in the heater cover heated by the heater from the ceiling of the cover, the temperature of the liquid in the container can be raised to quickly follow the temperature of the ceramic heater. Note that this idea is not limited to electric water heaters, but can also be applied to heaters for other fluids.
第１図はこの考案の電気加熱器の一実施例を示
す断面図、第２図は第１図の実施例に用いられる
ヒータカバーの平面図、第３図は第２図のヒータ
カバーの断面図、第４図は第２図のヒータカバー
の底面図、第５図は第２図のヒータカバーのＢ−
Ｂ視図、第６図は第２図のヒータカバーのＯ−Ａ
断面図、第７図はこの考案に係るヒータカバーを
設けた場合の温度上昇曲線、第８図はヒータカバ
ーのない場合の温度上昇曲線である。
２……加熱容器、３……セラミツクヒータ、４
……ヒータカバー、７……間隙。
Fig. 1 is a sectional view showing an embodiment of the electric heater of this invention, Fig. 2 is a plan view of a heater cover used in the embodiment of Fig. 1, and Fig. 3 is a sectional view of the heater cover of Fig. 2. Figure 4 is a bottom view of the heater cover in Figure 2, and Figure 5 is a bottom view of the heater cover in Figure 2.
B view, Figure 6 is O-A of the heater cover in Figure 2.
A cross-sectional view, FIG. 7 shows a temperature rise curve when the heater cover according to this invention is provided, and FIG. 8 shows a temperature rise curve when the heater cover is not provided. 2... Heating container, 3... Ceramic heater, 4
...Heater cover, 7...Gap.
Claims (1)
加熱器において、セラミツクヒータの上側に所定
内容積を有するヒータカバーを覆せるとともにヒ
ータカバーの天井面には半径方向に延在する複数
条の間隙にてなる液体流通用の開口を設けたこと
を特徴とする電気加熱器。 In an electric heater using a plate-shaped ceramic heater as a heating element, a heater cover having a predetermined internal volume can be covered above the ceramic heater, and a plurality of gaps extending in the radial direction are formed on the ceiling surface of the heater cover. An electric heater characterized by having an opening for liquid circulation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8398482U JPS58185135U (en) | 1982-06-04 | 1982-06-04 | electric heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8398482U JPS58185135U (en) | 1982-06-04 | 1982-06-04 | electric heater |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58185135U JPS58185135U (en) | 1983-12-09 |
| JPS638376Y2 true JPS638376Y2 (en) | 1988-03-14 |
Family
ID=30092953
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8398482U Granted JPS58185135U (en) | 1982-06-04 | 1982-06-04 | electric heater |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58185135U (en) |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56176618U (en) * | 1980-05-31 | 1981-12-26 |
-
1982
- 1982-06-04 JP JP8398482U patent/JPS58185135U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58185135U (en) | 1983-12-09 |
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