JPH0453524B2 - - Google Patents
Info
- Publication number
- JPH0453524B2 JPH0453524B2 JP58039706A JP3970683A JPH0453524B2 JP H0453524 B2 JPH0453524 B2 JP H0453524B2 JP 58039706 A JP58039706 A JP 58039706A JP 3970683 A JP3970683 A JP 3970683A JP H0453524 B2 JPH0453524 B2 JP H0453524B2
- Authority
- JP
- Japan
- Prior art keywords
- heat
- lid
- heater
- surface member
- jar
- 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 - Lifetime
Links
- 241000209094 Oryza Species 0.000 claims description 21
- 235000007164 Oryza sativa Nutrition 0.000 claims description 21
- 235000009566 rice Nutrition 0.000 claims description 21
- 239000002184 metal Substances 0.000 claims description 19
- 238000010411 cooking Methods 0.000 claims description 14
- 238000010438 heat treatment Methods 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 7
- 230000002093 peripheral effect Effects 0.000 claims description 5
- 229920003002 synthetic resin Polymers 0.000 claims description 4
- 239000000057 synthetic resin Substances 0.000 claims description 4
- 238000013022 venting Methods 0.000 claims description 3
- 230000005494 condensation Effects 0.000 description 10
- 238000009833 condensation Methods 0.000 description 10
- 230000000694 effects Effects 0.000 description 5
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 5
- 230000020169 heat generation Effects 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 239000011810 insulating material Substances 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920002379 silicone rubber Polymers 0.000 description 2
- 239000004945 silicone rubber Substances 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- -1 polypropylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 238000004078 waterproofing Methods 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Landscapes
- Cookers (AREA)
- Devices For Warming Or Keeping Food Or Tableware Hot (AREA)
Description
【発明の詳細な説明】
＜技術分野＞
この発明は、炊飯ジヤー、電子ジヤー等保温容
器に関し、さらに詳細にいえば、構成を簡単に
し、しかも保温性能を良好に保つ、炊飯ジヤー、
電子ジヤー等保温容器に関する。[Detailed Description of the Invention] <Technical Field> The present invention relates to a heat-retaining container such as a rice-cooking jar or an electronic jar, and more specifically, a rice-cooking jar, which has a simple configuration and maintains good heat retention performance.
Regarding thermal containers such as electronic jars.
＜背景＞
炊飯ジヤー、電子ジヤー等保温容器は、内鍋の
周側面から外部に向かつて熱が奪われることを防
止するために、内鍋収容容器と保温容器本体との
間に断熱材を介在させ、さらに内鍋の上部を蔽う
鍋蓋を、保温容器本体の蓋体により押圧するよう
にしている。そして、鍋蓋から外部に向かつて熱
が奪われることを防止するために、蓋体の内部に
断熱材を設けている。<Background> Insulating containers such as rice cooking jars and electronic jars have a heat insulating material interposed between the inner pot storage container and the main body of the heat insulating container to prevent heat from being taken away from the peripheral side of the inner pot toward the outside. Furthermore, the pot lid covering the upper part of the inner pot is pressed by the lid body of the heat-insulating container main body. In order to prevent heat from being taken away from the pot lid toward the outside, a heat insulating material is provided inside the lid.
しかし、このままでは鍋蓋の下面に結露を生
じ、鍋蓋を開くたびに結露が内鍋の内部に流下す
る。 However, if this continues, condensation will form on the underside of the pot lid, and every time the pot lid is opened, the condensation will flow down into the inner pot.
＜従来技術＞
従来の保温装置においては、鍋蓋の下面に結露
を生じることを防止するために、保温容器本体の
蓋体に蓋ヒータを設け、蓋ヒータの作用により鍋
蓋の温度を保温温度より少し高い温度（たとえば
0.5〜２℃程度高い温度）に保持して、鍋蓋下面
の結露の発生を防止するようにしている。<Prior art> In conventional heat retention devices, in order to prevent condensation from forming on the underside of the pot lid, a lid heater is provided on the lid body of the heat insulating container body, and the temperature of the pot lid is controlled by the action of the lid heater to the insulating temperature. Temperatures slightly higher than (e.g.
The temperature is maintained at a temperature approximately 0.5 to 2 degrees Celsius higher (approximately 0.5 to 2 degrees Celsius) to prevent condensation from forming on the underside of the pot lid.
第８図は従来の炊飯ジヤーの蓋体を示す中央縦
断面図であり、炊飯ジヤー本体２８の蓋体を、上
面部材２１と、下面部材２２と、蓋ヒータとで構
成している。さらに詳細に説明すれば、上面部材
２１は金属薄板製等で、プレス成形等により下部
を大きく開口させた形状に構成され、下面部材２
２は金属より熱伝導率が低い合成樹脂板製等のリ
ング状部材であつて、上記上面部材２１の下部開
口外周縁部を蔽う大きさに構成されている。蓋ヒ
ータは下面部材２２の中央開口部を蔽う金属製の
放熱板３３と、放熱板３３の上面に設けたヒータ
２３と、放熱板３３との間にヒータ２３を保持す
る保持板３４とで構成され、放熱板３３と下面部
材２２との間にパツキング３５を介在させること
により水分の侵入を防止している。尚、２５は内
蓋２６の上部開口を蔽う鍋蓋であり、ワンタツチ
ピン２７によつて蓋ヒータの中央部に吊り下げら
れている。２９は鍋蓋２５の周縁寄り部に設けた
蒸気抜き用の蒸気口であり、下面部材２２および
上面部材２１に設けた孔３１，３０を通して外部
に臨むようにしている。 FIG. 8 is a central vertical sectional view showing the lid of a conventional rice cooking jar, and the lid of the rice cooking jar main body 28 is composed of an upper surface member 21, a lower surface member 22, and a lid heater. More specifically, the upper surface member 21 is made of a thin metal plate or the like, and is formed into a shape with a large opening at the bottom by press molding or the like.
Reference numeral 2 denotes a ring-shaped member made of a synthetic resin plate or the like having a lower thermal conductivity than metal, and is configured in a size that covers the outer peripheral edge of the lower opening of the upper surface member 21. The lid heater is composed of a metal heat sink 33 that covers the central opening of the lower member 22, a heater 23 provided on the top surface of the heat sink 33, and a holding plate 34 that holds the heater 23 between the heat sink 33. A packing 35 is interposed between the heat sink 33 and the lower surface member 22 to prevent moisture from entering. Note that 25 is a pot lid that covers the upper opening of the inner lid 26, and is suspended from the center of the lid heater by a one-touch pin 27. Reference numeral 29 denotes a steam vent for venting steam provided near the periphery of the pot lid 25, and faces the outside through holes 31 and 30 provided in the lower surface member 22 and the upper surface member 21.
＜発明が解決しようとする課題＞
以上の構成とした場合には、放熱板３３が金属
で構成されているため、必然的に熱伝導率が高く
なる結果、蓋ヒータによつて鍋蓋２５の中央部を
高温とすることができるが、電圧変動による発熱
ムラの影響により鍋蓋２５の温度が変動する他、
鍋蓋２５の周縁部は余り高温とすることができ
ず、温度勾配が大きくなるので、たとえば内鍋２
６の中央部ではご飯を褐変させ、内鍋２６の周側
板部ではご飯に白ボケを生じさせることとなり、
あまり良好な保温状態とはいえなかつた。放熱板
３３を大きくすれば、保温性能は改善されるが、
蒸気口２９との関係もあるので構造が複雑化し、
絶縁性能が劣化するおそれもあり、コストが高く
なる等の不具合を生ずるのである。<Problems to be Solved by the Invention> In the case of the above configuration, since the heat dissipation plate 33 is made of metal, the heat conductivity inevitably increases, and as a result, the lid heater prevents the pot lid 25 from being heated. Although it is possible to make the center part high temperature, the temperature of the pot lid 25 fluctuates due to uneven heat generation due to voltage fluctuations.
The peripheral edge of the pot lid 25 cannot be heated to a very high temperature and the temperature gradient becomes large.
In the center part of the inner pot 26, the rice will turn brown, and in the peripheral side plate part of the inner pot 26, the rice will become white.
The heat retention conditions were not very good. If the heat dissipation plate 33 is made larger, the heat retention performance will be improved, but
The structure is complicated due to the relationship with the steam port 29,
There is also a risk that the insulation performance will deteriorate, leading to problems such as increased costs.
また、蓋体の製造にあたつては、下面部材２２
の取り付け作業の他に蓋ヒータの取り付け作業が
必要であり、さらには蓋ヒータを取り付ける場合
に、水分の侵入を防止する部材としても作用する
保持部材３４を装着する作業も必要であり、蓋体
の構成が複雑化し、コストも高くなつていた。さ
らには蒸気口２９付近を加熱する構成ではないか
ら、この部分に結露を生じることにもなつてい
た。 In addition, when manufacturing the lid, the lower surface member 22
In addition to the installation work, it is necessary to install the lid heater.Furthermore, when installing the lid heater, it is also necessary to attach the holding member 34, which also acts as a member to prevent moisture from entering, and the lid heater must be installed. The configuration was becoming more complex and the cost was increasing. Furthermore, since the structure is not designed to heat the vicinity of the steam port 29, dew condensation may occur in this area.
＜目的＞
この発明は、上記の問題点を解消し、取り付け
作業が簡単な構成で良好な保温性能を持たせるこ
とができる保温容器を提供することを目的として
いる。<Objective> An object of the present invention is to solve the above-mentioned problems and provide a heat-retaining container that can be easily installed and has good heat-retaining performance.
＜構成＞
以上の目的を達成するこの発明の保温容器の構
成は、蓋体に蓋ヒータを内蔵した炊飯ジヤー、電
子ジヤー等保温容器において、上記蓋体の下面を
形成する下面部材を金属よりも熱伝導率が低い材
質で形成し、この下面部材に、蓋体内部に臨ませ
た嵌入溝を一体成形し、この嵌入溝内に、上記下
面部材を面状発熱体として作用させるヒータを嵌
め入れたことを特徴としている。<Structure> The structure of the heat-insulating container of the present invention that achieves the above-mentioned object is that in a heat-insulating container such as a rice cooker or an electronic jar that has a built-in lid heater in the lid, the lower surface member forming the lower surface of the lid is made of metal. The lower surface member is made of a material with low thermal conductivity, and a fitting groove facing the inside of the lid body is integrally molded into the lower surface member, and a heater is fitted into this fitting groove to cause the lower surface member to act as a planar heating element. It is characterized by
＜作用＞
上記構成の炊飯ジヤー、電子ジヤー等保温容器
の蓋ヒータによれば、ヒータの発熱は下面部材に
伝導され、下面部材自体は金属よりも熱伝導率が
低いので、ヒータの発熱や電圧変動等による発熱
変化が緩和され、略均一に放熱する面状発熱体と
して作用することができる。<Function> According to the lid heater for a heat-retaining container such as a rice cooker or electronic jar with the above configuration, the heat generated by the heater is conducted to the lower surface member, and the lower surface member itself has a lower thermal conductivity than metal, so the heat generated by the heater and the voltage are reduced. Changes in heat generation due to fluctuations, etc. are alleviated, and it can function as a planar heating element that radiates heat substantially uniformly.
さらに上記下面部材の上面にヒータの嵌入溝を
一体形成し、この嵌入溝内に、上記ヒータを嵌め
入れるようにしているので、ヒータを嵌入溝内に
無理嵌めするだけで、ヒータの取り付け作業を、
当該ヒータが鍋蓋に対し露出しない状態で、完了
することができる。 Furthermore, a heater fitting groove is integrally formed on the upper surface of the lower surface member, and the heater is fitted into the fitting groove, so that the heater installation work can be done simply by forcefully fitting the heater into the fitting groove. ,
This can be completed without the heater being exposed to the pot lid.
＜実施例＞
以下、この発明について、実施例を示す添付図
面によつて詳細に説明する。<Examples> Hereinafter, the present invention will be described in detail with reference to the accompanying drawings showing examples.
第１図は炊飯ジヤーの蓋体を示す中央縦断面図
であり、第２図は下面部材２の平面図である。 FIG. 1 is a central longitudinal sectional view showing the lid of the rice cooker, and FIG. 2 is a plan view of the lower member 2. As shown in FIG.
これらの図を参照して、１は上面部材であり、
金属薄板製のプレス成形又は樹脂成形等により下
部を大きく開口させた形状に構成されている。 Referring to these figures, 1 is a top member;
It is formed by press molding or resin molding of a thin metal plate into a shape with a large opening at the bottom.
２は下面部材であり、金属より熱伝導率が低い
材料を円板状に形成し、上面所定位置にヒータ取
り付け用の嵌入溝４を形成している。そして、下
面部材２の直径は、上面部材１の下部開口を完全
に蔽うことができるような寸法に設定してある。
３は下面部材２とともに蓋ヒータを構成するヒー
タであり、上記嵌入溝４に嵌め込まれ、好適には
接着剤によつて固定される。５は内蓋６の上部開
口を蔽う鍋蓋であり、ワンタツチピン７によつて
下面部材２の中央部に吊り下げられ、かつ炊飯ジ
ヤー本体８の上部開口を蓋体にて密閉した状態で
下面部材２の下面と接触するように構成されてい
る。尚、９は鍋蓋５の所定位置に設けた蒸気抜き
用の蒸気口であり、上面部材１および下面部材２
に設けた孔１０，１１を通して外部に臨むように
しているまた１２はパツキンであり、第２図に示
す１３はヒータ３の接続端子を固定する金属テー
プである。 Reference numeral 2 denotes a lower surface member, which is made of a material having a lower thermal conductivity than metal and is formed into a disk shape, and has a fitting groove 4 for attaching a heater formed at a predetermined position on the upper surface. The diameter of the lower surface member 2 is set to such a size that it can completely cover the lower opening of the upper surface member 1.
A heater 3 constitutes a lid heater together with the lower surface member 2, and is fitted into the fitting groove 4 and fixed preferably with an adhesive. Reference numeral 5 denotes a pot lid that covers the upper opening of the inner lid 6, and is suspended from the center of the lower surface member 2 by a one-touch pin 7, and is attached to the lower surface member with the upper opening of the rice cooker main body 8 sealed by the lid body. It is configured to come into contact with the lower surface of 2. In addition, 9 is a steam vent for releasing steam provided at a predetermined position of the pot lid 5, and the upper surface member 1 and the lower surface member 2
The reference numeral 12 is a gasket which faces the outside through holes 10 and 11 provided in the heater 3, and the reference numeral 13 shown in FIG. 2 is a metal tape for fixing the connection terminal of the heater 3.
またヒータ３とリード線１６との接続は、第７
図に示すように、接続子１７にて行ない、さらに
シリコンゴムチユーブ１８にてヒータ３とリード
線１６との接続部分を包囲している。ここでヒー
タ３としては耐熱塩ビコードヒータを用い、リー
ド線１６としては、シリコンゴム・ガラス編組リ
ード線を用いることができる。 The connection between the heater 3 and the lead wire 16 is the seventh
As shown in the figure, this is done by a connector 17, and a silicone rubber tube 18 surrounds the connection portion between the heater 3 and the lead wire 16. Here, as the heater 3, a heat-resistant PVC cord heater can be used, and as the lead wire 16, a silicone rubber/glass braided lead wire can be used.
以上の構成の蓋体で鍋蓋５を押し下げ、内鍋６
の上部開口を蔽い、ヒータ３を通電することによ
り、以下のようにして内鍋６の内容物を良好に保
温することができる。 With the lid body configured as above, press down the pot lid 5 and press down the inner pot 6.
By covering the upper opening of the inner pot 6 and energizing the heater 3, the contents of the inner pot 6 can be well kept warm in the following manner.
即ち、ヒータ３の発熱は下面部材２に伝導さ
れ、下面部材２自体は金属よりも熱伝導率が低い
ので、ヒータ３の発熱や電圧変動等による発熱変
化が緩和され、略均一に放熱する面状発熱体とし
て作用することができる。そして、鍋蓋５も下面
部材２により加熱されて、その全面にわたつて保
温温度より少し高い温度となる。したがつて、た
とえばご飯の保温を行なう場合にも、従来のよう
な褐変、結露、白ボケ等を生じさせることなく良
好に保温を行なうことができる他、電圧変動によ
つてヒータ３の発熱量が変化しても、下面部材
２、鍋蓋５の温度はほとんど変化せず常に良好な
保温を行なうことができる。また、下面部材２自
体は金属よりも熱伝導率が低いので、ヒータ３の
制御機構によつてヒータ３の電源がON・OFFさ
れた場合に、それによる温度差が緩和され、良好
な保温状態を維持することができる。 That is, the heat generated by the heater 3 is conducted to the lower surface member 2, and since the lower surface member 2 itself has a lower thermal conductivity than metal, the heat generated by the heater 3 and changes in heat generated due to voltage fluctuations, etc. are alleviated, and the surface radiates heat almost uniformly. can act as a heating element. Then, the pot lid 5 is also heated by the lower surface member 2, and reaches a temperature slightly higher than the heat retention temperature over its entire surface. Therefore, when keeping rice warm, for example, it is possible to keep the rice warm without causing browning, dew condensation, white blurring, etc. as in conventional methods. Even if the temperature changes, the temperatures of the lower surface member 2 and the pot lid 5 hardly change, and good heat retention can always be performed. In addition, since the lower surface member 2 itself has a lower thermal conductivity than metal, when the power of the heater 3 is turned on and off by the control mechanism of the heater 3, the resulting temperature difference is alleviated, and a good heat retention state is achieved. can be maintained.
ヒータ３の取り付け位置については、下面部材
２の中心部から外周部にわたつて略等間隔に取り
付けてもよいが、外気と接触しやすい外周寄り部
のみに取り付けることも可能であり、このように
することによつて、保温性能を劣化させることな
く、ヒータ３の取り付けを簡素化することができ
る。この場合には、金属より熱伝導率が低い材質
製の下面部材２が、蓋体の下面外周寄り部のみを
蔽うよう構成し、下面部材２の中央部を他の材質
製板体２ａで蔽うことができる（第４図参照）。 Regarding the mounting positions of the heaters 3, they may be mounted at approximately equal intervals from the center to the outer periphery of the lower surface member 2, but it is also possible to mount them only near the outer periphery where they are likely to come into contact with the outside air. By doing so, the attachment of the heater 3 can be simplified without deteriorating the heat retention performance. In this case, the lower surface member 2 made of a material whose thermal conductivity is lower than that of metal is configured to cover only a portion near the outer periphery of the lower surface of the lid, and the central portion of the lower surface member 2 is covered with a plate 2a made of another material. (See Figure 4).
また、蒸気抜き用の蒸気口９には、他の部分と
比べて結露を生じやすいので、蒸気口９を挿通す
る下面部材２の孔１１を包囲するようにヒータ３
を設ければ、蒸気口９に結露を生じ、結露が流下
するという不具合を解消することができる。 In addition, since dew condensation is more likely to occur in the steam vent 9 for steam venting compared to other parts, the heater 3 is installed so as to surround the hole 11 of the lower surface member 2 through which the steam vent 9 is inserted.
By providing this, it is possible to solve the problem that dew condensation occurs at the steam port 9 and the dew condensation flows down.
さらに下面部材２については、金属より熱伝導
率が低いものであればよいのであるから、耐熱性
が良好な合成樹脂たとえば耐熱ポリプロピレン樹
脂にて成形することができる。実際にヒータ３に
通電して保温を行なつた場合には、保温電力が約
10W程度であり、ヒータ３の温度は、90℃以下で
あるから、上記の合成樹脂でも充分に耐えられる
のである。その他、碍子、セラミツク、木等を用
いることもできる。 Further, the lower surface member 2 may be made of a synthetic resin having good heat resistance, such as a heat-resistant polypropylene resin, since it is sufficient that the material has a lower thermal conductivity than metal. When heating is actually performed by energizing heater 3, the heating power is approx.
Since the power is about 10 W and the temperature of the heater 3 is 90° C. or lower, even the above synthetic resin can withstand it. In addition, insulators, ceramics, wood, etc. can also be used.
ヒータ３の取り付け構造についても、上記実施
例のように下面部材２の嵌入溝４にはめこんで接
着剤によつて固定する構造に限定されるものでは
なく、たとえば第３図に示すように、嵌入溝４を
無理抜き成形してコードヒータ３を無理嵌めによ
り嵌め入れることもできる。第３図に示す構造を
採用した場合には、コストを安くし、組立作業を
容易にし、しかも熱伝導効果を良好にして優れた
保温効果を発揮することができるのであるから、
最も好ましい。 The mounting structure of the heater 3 is also not limited to the structure in which it is fitted into the fitting groove 4 of the lower surface member 2 and fixed with adhesive as in the above embodiment; for example, as shown in FIG. It is also possible to forcibly punch out the fitting groove 4 and fit the cord heater 3 therein. If the structure shown in Fig. 3 is adopted, the cost can be reduced, assembly work can be made easy, and the heat conduction effect can be improved to provide an excellent heat retention effect.
Most preferred.
第５図はこの発明の別の実施例における電子ジ
ヤーの蓋体を示す中央縦断面図であり、第１図に
示す蓋体と異なる点は、蒸気口９、孔１０，１１
を設けていない点のみである。 FIG. 5 is a central vertical cross-sectional view showing a lid of an electronic jar according to another embodiment of the present invention, which differs from the lid shown in FIG.
The only difference is that there is no provision for this.
その他の部分の構成および作用は同一であるか
ら、説明は省略する。 Since the configuration and operation of other parts are the same, explanations will be omitted.
第６図は、この発明のさらに別の実施例におけ
る電子ジヤーの蓋体を示す中央縦断面図であり、
第５図に示す蓋体と異なる点は、ヒータ３を上面
に有する下面部材２が、内鍋６を蔽う鍋蓋を兼ね
る構成となつている点である。 FIG. 6 is a central vertical cross-sectional view showing a lid of an electronic jar in still another embodiment of the present invention;
The difference from the lid shown in FIG. 5 is that the lower surface member 2 having the heater 3 on the upper surface also serves as a lid for covering the inner pot 6.
第６図中、１４は下面部材２の上面に設けたキ
ヤツプであり、１９は、下面部材２とキヤツプ１
４との間に介在して、鍋蓋２を通して外部に熱が
奪われることを防止する断熱材であり、１５は下
面部材２と内鍋６との間の気密を保持する環状パ
ツキンである。第７図の構成においても、上記実
施例の場合と同様に、優れた保温効果を発揮させ
ることができる。 In FIG. 6, 14 is a cap provided on the upper surface of the lower surface member 2, and 19 is a cap provided on the upper surface of the lower surface member 2 and the cap 1.
4 is a heat insulating material that prevents heat from being transferred to the outside through the pot lid 2, and 15 is an annular packing that maintains airtightness between the lower surface member 2 and the inner pot 6. In the configuration shown in FIG. 7 as well, it is possible to exhibit an excellent heat retention effect as in the case of the above embodiment.
＜効果＞
以上のようにこの発明は、蓋体に蓋ヒータを内
蔵した炊飯ジヤー、電子ジヤー等保温容器におい
て、上記蓋体の下面を形成する下面部材を金属よ
りも熱伝導率が低い材質で形成し、この下面部材
に、蓋体内部に臨ませた嵌入溝を一体成形し、こ
の嵌入溝内に、上記下面部材を面状発熱体として
作用させるヒータを嵌め入れているので、ヒータ
の発熱は下面部材に伝導され、下面部材自体は金
属よりも熱伝導率が低いので、ヒータの発熱や電
圧変動等による発熱変化が緩和され、略均一に放
熱する面状発熱体として作用することができる。
したがつてこの発明によれば、金属で構成した放
熱板よりも放熱される温度の勾配を一層小さくす
ることが可能になる。したがつて、鍋蓋の結露を
防止することができ、良好な保温性能を保たせる
ことができるという特有の効果を奏する。<Effects> As described above, the present invention provides a heat-retaining container such as a rice cooker or an electronic jar that has a built-in lid heater in its lid, in which the lower surface member forming the lower surface of the lid is made of a material with lower thermal conductivity than metal. A fitting groove facing the inside of the lid body is integrally formed on the lower surface member, and a heater that causes the lower surface member to act as a planar heating element is fitted into this fitting groove, so that the heat generated by the heater is reduced. is conducted to the lower surface member, and since the lower surface member itself has a lower thermal conductivity than metal, heat generation changes due to heater heat generation, voltage fluctuations, etc. are alleviated, and it can act as a planar heating element that radiates heat almost uniformly. .
Therefore, according to the present invention, it is possible to further reduce the gradient of heat radiated temperature than with a heat sink made of metal. Therefore, the unique effect of being able to prevent dew condensation on the pot lid and maintain good heat retention performance is achieved.
さらに下面部材は金属よりも熱伝導率が低いの
で、ヒータの電源がON・OFFされた場合に、そ
れによる温度差が緩和され、良好な保温状態を維
持することができるという利点もある。 Furthermore, since the lower surface member has a lower thermal conductivity than metal, it has the advantage that when the power to the heater is turned on and off, the resulting temperature difference is alleviated and good heat retention can be maintained.
しかもヒータを下面部材に一体形成された嵌入
溝内に嵌め入れるだけでヒータが鍋蓋に対し露出
しない状態で取り付け作業を完了することができ
る結果、取り付け作業が容易になる。また、特別
な防水処理を施す必要もなくなり、さらに第９図
で説明した保持板３４等の保持部材も不要になる
ので、部品点数を減らしてコスト低減を図ること
ができるという利点もある。 Moreover, the installation work can be completed simply by fitting the heater into the fitting groove formed integrally with the lower surface member without exposing the heater to the pot lid, which facilitates the installation work. In addition, there is no need for special waterproofing treatment, and furthermore, there is no need for holding members such as the holding plate 34 described in FIG. 9, so there is an advantage that the number of parts can be reduced and costs can be reduced.
さらにヒータを嵌入溝に嵌め入れる構成を採用
しているので、ヒータと下面部材との接触面積が
増大し、ヒータの熱損失を低減できるという利点
もある。 Furthermore, since the heater is fitted into the fitting groove, the contact area between the heater and the lower surface member is increased, and there is also the advantage that heat loss of the heater can be reduced.
第１図はこの発明による炊飯ジヤーの蓋体の中
央縦断面図、第２図は下面部材２の平面図、第３
図は下面部材２とコードヒータ３との取り付け構
造を示す拡大縦断面図、第４図ないし第６図はこ
の発明のそれぞれ別の実施例における電子ジヤー
の蓋体の中央縦断面図、第７図はヒータ３とリー
ド線１６との接続構造を示す中央縦断側面図、第
８図は従来例による炊飯ジヤーの蓋体の中央縦断
図。
２……下面部材、３……ヒータ、４……嵌入
溝、９……蒸気口、１１……孔。
FIG. 1 is a central vertical cross-sectional view of the lid of the rice cooking jar according to the present invention, FIG. 2 is a plan view of the lower surface member 2, and FIG.
The figure is an enlarged vertical sectional view showing the attachment structure of the lower surface member 2 and the cord heater 3, FIGS. The figure is a central vertical sectional side view showing the connection structure between the heater 3 and the lead wire 16, and FIG. 8 is a central vertical sectional view of the lid of the conventional rice cooker. 2... Bottom member, 3... Heater, 4... Fitting groove, 9... Steam port, 11... Hole.
Claims (1)
ジヤー等保温容器において、上記蓋体の下面を形
成する下面部材を金属よりも熱伝導率が低い材質
で形成し、この下面部材に、蓋体内部に臨ませた
嵌入溝を一体成形し、この嵌入溝内に、上記下面
部材を面状発熱体として作用させるヒータを嵌め
入れたことを特徴とする炊飯ジヤー、電子ジヤー
等保温容器。 ２ 下面部材で蓋体の下面全域を蔽う上記特許請
求の範囲第１項記載の炊飯ジヤー、電子ジヤー等
保温容器。 ３ 下面部材で蓋体の下面外周寄り部を蔽う上記
特許請求の範囲第１項記載の炊飯ジヤー、電子ジ
ヤー等保温容器。 ４ 下面部材の少なくとも外周寄り部にヒータを
設けた上記特許請求の範囲第２項記載の炊飯ジヤ
ー、電子ジヤー等保温容器。 ５ 下面部材に蒸気抜き用の蒸気口を挿通する孔
を設けた上記特許請求の範囲第１項記載の炊飯ジ
ヤー、電子ジヤー等保温容器。 ６ 下面部材の蒸気口を挿通する孔を包囲するよ
うヒータを設けた上記特許請求の範囲第５項記載
の炊飯ジヤー、電子ジヤー等保温容器。 ７ 下面部材を金属より熱伝導率が低く、かつ耐
熱性が良好な合成樹脂で構成した上記特許請求の
範囲第１項又は第４項又は第６項記載の炊飯ジヤ
ー、電子ジヤー等保温容器。 ８ コードヒータを下面部材又は鍋蓋の上面に設
けた上記特許請求の範囲第１項又は第４項又は第
６項記載の炊飯ジヤー、電子ジヤー等保温容器。[Scope of Claims] 1. In a heat-retaining container such as a rice cooker or an electronic jar having a built-in lid heater in the lid, the lower surface member forming the lower surface of the lid is formed of a material having a lower thermal conductivity than metal, and this A rice cooking jar and an electronic jar, characterized in that a fitting groove facing the inside of the lid body is integrally formed on the bottom member, and a heater is fitted into the fitting groove to make the bottom member act as a planar heating element. Isothermal container. 2. A heat-retaining container such as a rice cooking jar or an electronic jar according to claim 1, wherein the lower surface member covers the entire lower surface of the lid. 3. A heat-retaining container such as a rice cooking jar or an electronic jar as set forth in claim 1, wherein the lower surface member covers the outer peripheral portion of the lower surface of the lid. 4. A heat-retaining container such as a rice cooking jar or an electronic jar as set forth in claim 2, wherein a heater is provided at least near the outer periphery of the lower surface member. 5. A heat-retaining container such as a rice-cooking jar or an electronic jar as set forth in claim 1, wherein the lower surface member is provided with a hole through which a steam vent for venting steam is inserted. 6. A heat-retaining container such as a rice cooking jar or an electronic jar as set forth in claim 5, wherein a heater is provided to surround a hole through which a steam port is inserted in the lower surface member. 7. A heat-retaining container such as a rice-cooking jar, an electronic jar, etc. according to claim 1, 4, or 6, wherein the lower surface member is made of a synthetic resin that has lower thermal conductivity than metal and has better heat resistance. 8. A heat-retaining container such as a rice cooking jar or an electronic jar as set forth in claim 1, 4, or 6 above, wherein a cord heater is provided on the lower surface member or the upper surface of the pot lid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3970683A JPS59164023A (en) | 1983-03-09 | 1983-03-09 | Lid heater for rice cooking jar and electronic jar |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3970683A JPS59164023A (en) | 1983-03-09 | 1983-03-09 | Lid heater for rice cooking jar and electronic jar |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59164023A JPS59164023A (en) | 1984-09-17 |
| JPH0453524B2 true JPH0453524B2 (en) | 1992-08-26 |
Family
ID=12560443
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3970683A Granted JPS59164023A (en) | 1983-03-09 | 1983-03-09 | Lid heater for rice cooking jar and electronic jar |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59164023A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5584020B2 (en) * | 2010-06-23 | 2014-09-03 | 東芝ホームテクノ株式会社 | rice cooker |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5630829B2 (en) * | 1976-04-26 | 1981-07-17 | ||
| JPS5766715A (en) * | 1980-10-14 | 1982-04-23 | Matsushita Electric Ind Co Ltd | Jar rice cooker |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5856581Y2 (en) * | 1979-08-20 | 1983-12-27 | 松下電器産業株式会社 | jar rice cooker lid |
-
1983
- 1983-03-09 JP JP3970683A patent/JPS59164023A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5630829B2 (en) * | 1976-04-26 | 1981-07-17 | ||
| JPS5766715A (en) * | 1980-10-14 | 1982-04-23 | Matsushita Electric Ind Co Ltd | Jar rice cooker |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59164023A (en) | 1984-09-17 |
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