JPS61164525A

JPS61164525A - Electric pot

Info

Publication number: JPS61164525A
Application number: JP626185A
Authority: JP
Inventors: 米良　貴文
Original assignee: Matsushita Electric Industrial Co Ltd
Current assignee: Panasonic Holdings Corp
Priority date: 1985-01-16
Filing date: 1985-01-16
Publication date: 1986-07-25
Also published as: JPH0544289B2

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

【発明の詳細な説明】産業上の利用分野本発明は収容液体を加熱、保温する電気湯沸し器に関す
るものである。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an electric water heater for heating and keeping a contained liquid warm.

従来の技術従来、この種の電気湯沸し器の発熱体構成としては１例
えば特開昭５９−８２８１６号公報に示されているもの
が知られている。これは第４図に示すように、有底筒状
の容器（１）底部の伝熱面（２）の下面に平板上の発熱
盤（３）が上・下を絶縁板（４）　（５）で積層状態に
されて設けられており、この発熱盤（３）の中央には透
孔部を有している。この発熱盤（３）は中央に透孔部を
有した金属熱拡散板（６）を下側に配設し、背面板（７
）により伝熱面（２）の下面に圧着状態で内蔵されて発
熱体部（８）を形成しているものであった。2. Description of the Related Art Hitherto, one known construction of a heating element for this type of electric water heater is shown in, for example, Japanese Unexamined Patent Publication No. 59-82816. As shown in Figure 4, this is a cylindrical container with a bottom (1), a heating plate (3) on the bottom of a heat transfer surface (2) on the bottom, and an insulating plate (4) (5) on the top and bottom. ) are provided in a laminated state, and the heat generating plate (3) has a through hole in the center. This heating plate (3) has a metal heat diffusion plate (6) with a through hole in the center disposed on the lower side, and a back plate (7).
) to form a heating element part (8) which was built into the lower surface of the heat transfer surface (2) in a compressed state.

発明が解決しようとする問題点このような従来の構成では、発熱盤（３）を圧着する手
段として、背面板（７）の下面をばね部材等で機械的に
圧着するか、伝熱面（２）と背面板（７）の内・外側面
を点溶接等で固着する方法が考えられるが、前者の場８
合、伝熱面（２）の下面に発熱盤（３）を水密的に圧着
するとなると相当大きなばね圧を必要とし、又はね部材
を支持する別部材を容器（１）の下面に固着しなければ
ならない等コスト高になるばかりか１発熱盤（３）を均
一に圧着するためにばね部材を取付けるスペースを必要
とし、又はね部材自身の形状が複雑になり、リード線等
の配線作業のわずられしさが生じ、組立性も好ましくな
かった。後者の場合は、伝熱面（２）と背面板（７）の
点溶接時、フラッシュ現象が生じ、そのフラッシュが発
熱体部（８）を構成する微細な隙間から侵入し、発熱盤
（３）に巻装された発熱線と発熱体部（８）を構成する
非充電金属部間とで電気絶縁劣化を生じる等の問題があ
った。Problems to be Solved by the Invention In such a conventional configuration, as a means for crimping the heat-generating plate (3), the lower surface of the back plate (7) is mechanically crimped with a spring member or the like, or the heat-transfer surface ( 2) and the inner and outer surfaces of the back plate (7) can be fixed by spot welding, etc., but in the former case 8
In this case, if the heating plate (3) is to be watertightly crimped to the lower surface of the heat transfer surface (2), a considerably large spring pressure is required, or another member supporting the spring member must be fixed to the lower surface of the container (1). Not only does this increase costs, but it also requires a space to install the spring member in order to evenly press the heat generating plate (3), or the shape of the spring member itself becomes complicated, making it difficult to wire lead wires, etc. This caused a tendency to shift, and the ease of assembly was also unfavorable. In the latter case, a flash phenomenon occurs during spot welding of the heat transfer surface (2) and the back plate (7), and the flash enters through the minute gap that constitutes the heating element part (8), causing the heating plate (3 ) There have been problems such as electrical insulation deterioration between the heating wire wound around the heating element (8) and the non-charged metal part constituting the heating element section (8).

本発明はこのような問題点を解決するもので。The present invention is intended to solve these problems.

安価で組立性が向上し、電気絶縁性に優れた電気湯沸し
器を提供することを目的とするものである。The object of the present invention is to provide an electric water heater that is inexpensive, easy to assemble, and has excellent electrical insulation.

問題点を解決するための手段この問題点を解決するために本発明は、有底筒状の容器
底面を略り型状に突出させた伝熱面下部に、上・下部面
を絶縁板で覆われ、且つ中央部に透孔を有する発熱盤と
、この発熱盤の上側に位置し前記発熱盤の内・外側部を
抱持する内周縁部と外周縁部を有し且つ外周縁部は前記
容器の突出部内側壁と密着するように形成されて中央部
に透孔を有する良熱伝導性の熱拡散板とを配設し、これ
ら発熱盤及び熱拡散板を中央部に透孔を有し、且つ前記
容器の略り型状の突出部に対応した成形がなされた背面
板で複数の点溶接により圧着固定して発熱体部を構成し
たものである。Means for Solving the Problem In order to solve this problem, the present invention has a bottomed cylindrical container with an insulating plate attached to the lower part of the heat transfer surface which protrudes in the shape of a bottom. It has a heat generating plate that is covered and has a through hole in the center, and an inner peripheral edge and an outer peripheral edge that are located above the heat generating plate and hold the inner and outer parts of the heat generating plate, and the outer peripheral edge is A heat diffusion plate of good thermal conductivity is formed so as to be in close contact with the inner wall of the protruding portion of the container and has a through hole in the center, and the heating plate and the heat diffusion plate have a through hole in the center. The heat generating body is constructed by attaching a back plate formed to correspond to the substantially shaped protrusion of the container and fixed by pressure by a plurality of spot welds.

作用この構成により、ばね部材等を使用することなく組立性
の向上が図れ、発熱盤の内・外側部を抱持する如く形成
した熱拡散板の内周縁部と外周縁部とで点溶接時のフラ
ッシュを遮断することとなる。Function: With this configuration, ease of assembly can be improved without using spring members, etc., and the inner and outer peripheral edges of the heat diffusion plate, which are formed to hold the inner and outer parts of the heat generating plate, can be spot welded. The flash will be blocked.

実施例以下、本発明の一実施例について、第１図〜第３図に基
づいて説明する。EXAMPLE Hereinafter, an example of the present invention will be described based on FIGS. 1 to 3.

図において、（９）は中央部を上方へ略り型状に突出さ
せて外周側部縁（９ａ）を形成した伝熱面で、Ｄカット
された側部縁（９ｂ）の下部に温度検知面（９ｃ）を有
し、筒体の下端にその外縁部を液密に溶接等の手段で固
着することにより、金属製の容器（１０）を形成してい
る。（１１）は容器（ｉｏ）を空間を介して包む外装体
である。前記伝熱面（９）の下部には上・下部面を絶縁
板（１２）　（１３）で覆われた発熱盤（１４）と、こ
の発熱盤（１４）の上側に位置し発熱盤（１４）の内・
外側部（１４ａ）　（１４ｂ）を抱持する内周縁部（１
５ａ）と外周縁部（１５ｂ）を有し且つ外周縁部（ｉｓ
ｂ）は前記容器（ｌＯ）の突出部内側壁（１６）と密着
するように形成した良熱伝導性の熱拡散板（１５）が配
設されている。（１７）は主発熱体、（１８）は補助発
熱体。In the figure, (9) is a heat transfer surface whose central part is protruded upwards to form an outer peripheral side edge (9a), and the temperature is detected at the lower part of the D-cut side edge (9b). A metal container (10) is formed by having an outer edge liquid-tightly fixed to the lower end of the cylindrical body by means such as welding. (11) is an exterior body that encloses the container (io) with a space in between. At the bottom of the heat transfer surface (9), there is a heat generating plate (14) whose upper and lower surfaces are covered with insulating plates (12) (13), and a heat generating plate (14) located above the heat generating plate (14). )
Inner peripheral edge portion (1) holding outer portions (14a) (14b)
5a) and an outer peripheral edge (15b), and has an outer peripheral edge (is
In b), a heat diffusion plate (15) with good thermal conductivity is disposed so as to be in close contact with the inner wall (16) of the protruding portion of the container (lO). (17) is the main heating element, and (18) is the auxiliary heating element.

（１９）は良熱伝導性の熱板である。（２０）は中央部
に透孔（２０ａ）を設け、前記容＃　（１０）の突出部
に対応した成形がなされた良熱伝導性の背面板で、透孔
（２０ａ）の内縁部（２１）と外方に延設した外縁部（
２２）とにより、中央部に夫々透孔（１５ｃ）　（１４
ｃ）　（１２ａ）（１３ａ）　（１９ａ）を有する熱拡
散板（１５）、発熱盤（１４）、絶縁板（１２）　（１
３）、熱板（１９）を前記容器（１０）の伝熱面（９）
の下面に装着し、複数の点溶接で圧着して固着された発
熱体部（３５）を構成している。　（２３）は温度制御
器で、伝熱面（９）の温度検知面（９ｃ）には良熱伝導
部材で一体化した感温リードスイッチ（２４）と温度ヒ
ユーズ（２５）の受熱部が密着状態となるように押えば
ね（２６）により固着されている。(19) is a hot plate with good thermal conductivity. (20) is a back plate with good thermal conductivity that has a through hole (20a) in the center and is shaped to correspond to the protruding part of the volume # (10), and the inner edge (21) of the through hole (20a) ) and an outwardly extending outer edge (
22), a through hole (15c) (14
c) (12a) (13a) (19a) Thermal diffusion plate (15), heating plate (14), insulating plate (12) (1
3), the heat plate (19) is placed on the heat transfer surface (9) of the container (10).
It constitutes a heating element part (35) which is attached to the lower surface of the housing and is crimped and fixed by a plurality of spot welds. (23) is a temperature controller, and the heat-receiving part of the temperature-sensitive reed switch (24) and temperature fuse (25), which are integrated with a good heat-conducting material, is in close contact with the temperature detection surface (9c) of the heat-transfer surface (9). It is fixed by a spring (26) so as to be in the state.

（２７）は本体（２８）の上面に開閉自在に装着された
エアーポンプ（２９）を内蔵した蓋体、　（３Ｇ）は容
Ｈｈ（１０）の上端開口部に着脱自在に載置された中栓
で５通気口（３１）と通水路（３２）を有している。　
（３３）は容器（１０）内の客演の液量を示す液量管で
ある。　（３４）は発熱体部（３５）の下面を覆う遮熱
板である。又、前記主発熱体（１７）は温度制御器（２
３）に、補助発熱体（１８）は感温リードスイッチ（２
４）に夫々電気回路で結合されて並列回路を形成し、更
に温度ヒユーズ（２５）が直列接続されて電気湯沸し器
を構成している。(27) is a lid with a built-in air pump (29) attached to the top of the main body (28) so that it can be opened and closed, and (3G) is a lid that is detachably placed on the top opening of the container Hh (10). It is a plug and has 5 ventilation ports (31) and a water passage (32).
(33) is a liquid volume tube that indicates the amount of guest liquid in the container (10). (34) is a heat shield plate that covers the lower surface of the heating element section (35). Further, the main heating element (17) is connected to a temperature controller (2).
3), the auxiliary heating element (18) is connected to the temperature-sensitive reed switch (2).
4) are connected to each other by an electric circuit to form a parallel circuit, and a temperature fuse (25) is further connected in series to form an electric water heater.

上記構成において１発熱ＩＩ　（１４）の内・外側部（
１４ａ）　（１４ｂ）を抱持する内周縁部（１５ａ）と
外周縁部（１５ｂ）を有し且つ外周縁部（１５ｂ）は容
器（１０）の突出部内側Ｍ（１６）と密着するように形
成した良熱伝導性の熱拡散板（１５）を配設しているの
で、背面板（２０）の内縁部（２１）と外縁部（２２）
を容器（１０）の底面に点溶接したときに発生するフラ
ッシュを熱拡散板（１５）の内周縁部（１５ａ）と外周
縁部（１５ｂ）とにより遮断するので、電気絶縁性が確
保できる。従って、加工時の不良率低減も図れるもので
ある。In the above configuration, the inner and outer parts of 1 heat generation II (14) (
14a) It has an inner circumferential edge (15a) and an outer circumferential edge (15b) that hold (14b), and the outer circumferential edge (15b) is in close contact with the inside of the protrusion M (16) of the container (10). Since the formed heat diffusion plate (15) with good thermal conductivity is disposed, the inner edge (21) and outer edge (22) of the back plate (20)
Since the flash generated when spot welding is performed on the bottom surface of the container (10) is blocked by the inner peripheral edge (15a) and outer peripheral edge (15b) of the heat diffusion plate (15), electrical insulation can be ensured. Therefore, it is possible to reduce the defect rate during processing.

発明の効果以上のように本発明によれば、発熱盤の内・外側部を抱
持するように形成した熱拡散板の内周縁部と外周縁部と
で、背面板を容器の底面に点溶接するときに発生するフ
ラッシュを遮断するので、信頼性の高い電気絶縁性の確
保が可能となる。従って加工時の不良率低減と、ばね部
材等を使用することなく安価で組立性の向上が図れると
いう効果が得られる。Effects of the Invention As described above, according to the present invention, the inner peripheral edge and the outer peripheral edge of the heat diffusion plate formed so as to hold the inner and outer parts of the heat generating plate can point the back plate to the bottom surface of the container. Since the flash generated during welding is blocked, highly reliable electrical insulation can be ensured. Therefore, it is possible to reduce the defect rate during processing and to improve assembly efficiency at low cost without using a spring member or the like.

[Brief explanation of the drawing]

第１図〜第３図は本発明の一実施例を示すもので、第１
図（ａ）及び（ｂ）は発熱体部の拡大断面図及び容器下
部の断面図、第２図は発熱体部の分解斜視図、第３ＷＩ
は全体断面図、第４図は従来の電気湯沸し器の要部断面
図である。（９）・・・伝熱面、（１０）・・・容器、（１２：’
　（１３）・・・絶縁板、（１２ａ）　（１３ｂ）−透
孔、（１４）−・・発熱盤、　（Ｌ４ａ）−内側部、（
１４ｂ）・・・外側部、（Ｌ４ｃ）・・・透孔、　（ｔ
Ｓ）・・・熱拡散板、（１５ａ）−内周縁部、（Ｌ５ｂ
）−・・外周縁部、（１５ｃ）・・・透孔、　（１６）
・・・内側壁、（１９）・・・熱板、（１９ａ）・・・
透孔、（２０）・・・背面板、（２０ａ）・・・透孔、
（３５）・・・発熱体部 ′　代理人　　　森　　本　　義　　弘第１スｎ−妃４１Ｉ板１４−　発熱盤ｔ４ａ−内イ則都ｆｉ９−−一夕）狽り都ｔＳ−−−一煕板嘴父板Ｉｊｚ、−、内周慧都゛１１−一・−−一蓼票１第２図１２ａ　−−−−’ｆＬ犯第４図Figures 1 to 3 show one embodiment of the present invention.
Figures (a) and (b) are an enlarged sectional view of the heating element and a sectional view of the lower part of the container, Figure 2 is an exploded perspective view of the heating element, and 3rd WI
1 is an overall sectional view, and FIG. 4 is a sectional view of a main part of a conventional electric water heater. (9)... Heat transfer surface, (10)... Container, (12:'
(13)... Insulating plate, (12a) (13b) - Through hole, (14) - Heat generating board, (L4a) - Inner part, (
14b)...Outside part, (L4c)...Through hole, (t
S)...Heat diffusion plate, (15a)-inner peripheral edge, (L5b
)--Outer edge, (15c)...Through hole, (16)
...Inner wall, (19)...Hot plate, (19a)...
Through hole, (20)... Back plate, (20a)... Through hole,
(35)... Heating element section' Agent Yoshihiro Morimoto 1st Sun-hi 41I board 14- Heating board t4a-inner I Norito fi9--Kazuya) Hikarito tS---Ikki board Beak Father Board Ijz, -, Naishu Keito゛11-1.

Claims

[Claims]

1. At the bottom of the heat transfer surface where the bottom surface of a cylindrical container with a bottom is protruded in a substantially D shape, a heat generating plate is covered with insulating plates on both upper and lower sides and has a through hole in the center, and this heat generating plate. It has an inner peripheral edge and an outer peripheral edge that are located on the upper side and hold the inner and outer parts of the heating plate, and the outer peripheral edge is formed so as to be in close contact with the inner wall of the protruding part of the container, and the outer peripheral edge is formed in the center part. A heat dissipating plate having good thermal conductivity and having a through hole is disposed, and the heat generating plate and the heat diffusing plate have a through hole in the center and are shaped to correspond to the approximately D-shaped protrusion of the container. This is an electric water heater whose heating element is formed by crimping and fixing the back plate with multiple spot welds.