JP4470450B2 - Water heater - Google Patents

Water heater Download PDF

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JP4470450B2
JP4470450B2 JP2003372490A JP2003372490A JP4470450B2 JP 4470450 B2 JP4470450 B2 JP 4470450B2 JP 2003372490 A JP2003372490 A JP 2003372490A JP 2003372490 A JP2003372490 A JP 2003372490A JP 4470450 B2 JP4470450 B2 JP 4470450B2
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case
flat plate
heating means
plate heating
hot water
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JP2005133479A (en
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英史 松井
英穂 篠田
英彦 新田
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Panasonic Corp
Panasonic Holdings Corp
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Panasonic Corp
Matsushita Electric Industrial Co Ltd
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  • Instantaneous Water Boilers, Portable Hot-Water Supply Apparatuses, And Control Of Portable Hot-Water Supply Apparatuses (AREA)

Description

本発明は、給水源から供給される水を所定温度の適温水に短時間で加熱して人体局部の洗浄用などに使用する、瞬間加熱式の温水装置に関するものである。   The present invention relates to an instantaneous heating type hot water apparatus that heats water supplied from a water supply source to an appropriate temperature water of a predetermined temperature in a short time and uses it for cleaning a human body part.

従来、この種の温水装置としては、すでに知られている（例えば、特許文献１参照）。   Conventionally, this kind of hot water apparatus is already known (for example, refer patent document 1).

これは、図７に示すように、薄形矩形断面形状の平板状加熱手段２０と、平板状加熱手段２０に一体に設けられたフランジ２１と、平板状加熱手段２０を収納するタンク２２と、タンク２２に設けられた入水口２３および出湯口２４と、平板状加熱手段２０とタンク２２の内面との間に設けられた蛇行水路２５とを備え、入水口２３と出湯口２４とを蛇行水路２５を介して連通するとともに、タンク２２の開口端部とフランジ２１とを締結し、温水装置２６を構成している。すなわち、平板状加熱手段２０をタンク２２に収納後、平板状加熱手段２０の全周に設けられたフランジ２１にビス２７により締めつけてシールし、漏水を防止していた。
特開平１０−２２０８７６号公報 As shown in FIG. 7, the flat plate heating means 20 having a thin rectangular cross section, a flange 21 provided integrally with the flat plate heating means 20, a tank 22 for storing the flat plate heating means 20, A water inlet 23 and a hot water outlet 24 provided in the tank 22, a meandering water channel 25 provided between the flat plate heating means 20 and the inner surface of the tank 22, and the water inlet 23 and the hot water outlet 24 are connected to the meandering water channel. 25, and the open end of the tank 22 and the flange 21 are fastened to constitute a hot water device 26. That is, after storing the flat plate heating means 20 in the tank 22, the flange 21 provided on the entire circumference of the flat plate heating means 20 is sealed by screws 27 to prevent water leakage.
Japanese Patent Laid-Open No. 10-220876

しかしながら、前記従来の構成では、フランジ２１が存在するためコンパクト化や薄型化に限界があった。また、平板状加熱手段２０を挿入しフランジ２１でビス止めしてシールするという組み立てに、手間がかかるといった課題があった。   However, in the conventional configuration, since the flange 21 exists, there is a limit to the reduction in size and thickness. In addition, there is a problem that it takes time and labor to assemble the flat heating means 20 and fix it by screws with a flange 21 for sealing.

本発明は、前記従来の課題を解決するもので、フランジ部をなくして、より一層のコンパクト化・薄型化を実現し、かつ組み立ても簡単な温水装置の提供を目的とする。   SUMMARY OF THE INVENTION The present invention solves the above-described conventional problems, and an object thereof is to provide a hot water device that eliminates the flange portion, achieves further compactness and thickness reduction, and is easy to assemble.

前記課題を解決するために、本発明の温水装置は、発熱部と端子部が分かれた平板状加熱手段と、平板状加熱手段を収納する第一のケースおよび第二のケースと、平板状加熱手段の発熱部と端子部との中間外周を包囲し第一のケースもしくは第二のケースと平板状加熱手段間とを充填するシール材と、第一のケースもしくは第二のケースに設けられた入水口および出湯口と、第一のケースと第二のケースに設けられたシール材を挟み込む溝と、溝の一端から始まり平板状加熱手段の発熱部を包囲し溝の他端に達するシール部とを備え、第一のケースと第二のケースとを締結することにより、平板状加熱手段と第一のケースもしくは第二のケースとの間に水路を構成し、入水口と出湯口とを水路を介して連通したものである。 In order to solve the above-described problems, a hot water apparatus according to the present invention includes a flat plate heating means having a heat generating portion and a terminal portion, a first case and a second case housing the flat plate heating means, and a flat plate heating. Provided in the first case or the second case, and a sealing material that surrounds the intermediate outer periphery between the heat generating part and the terminal part of the means and fills the space between the first case or the second case and the flat plate heating means A water inlet and a hot water outlet, a groove sandwiching the sealing material provided in the first case and the second case, and a seal part which starts from one end of the groove and surrounds the heat generating part of the flat plate heating means and reaches the other end of the groove The first case and the second case are fastened to form a water channel between the flat plate heating means and the first case or the second case, and a water inlet and a water outlet are formed. It communicates through a waterway.

これにより、平板状加熱手段を第一のケースおよび第二のケースで挟み込みシールすることで、フランジ部が不必要となりコンパクト化かつ薄型化が図れる。しかも、第一のケースを土台にして、順に平板状加熱手段とシール材、最後に第二のケースを層状に積み重ね、第一のケースと第二のケースを締結するため、一方向組み立てが実現でき、組み立ての簡略化・機械によるオートメーション化が図れる。   Thereby, the flat plate-like heating means is sandwiched and sealed between the first case and the second case, so that the flange portion is unnecessary, and the size and thickness can be reduced. In addition, the first case is the foundation, the flat plate heating means and the sealing material, and finally the second case are stacked in layers, and the first case and the second case are fastened. It is possible to simplify assembly and automate by machine.

本発明の温水装置は、フランジ部をなくして、より一層のコンパクト化・薄型化を実現し、かつ組み立ても簡単なものとなる。   The hot water apparatus of the present invention eliminates the flange portion, realizes further compactness and thickness reduction, and is easy to assemble.

第１の発明は、発熱部と端子部が分かれた平板状加熱手段と、前記平板状加熱手段を収納する第一のケースと、前記平板状加熱手段を収納する第二のケースと、前記平板状加熱手段の前記発熱部と前記端子部との中間外周を包囲し、前記第一のケースもしくは前記第二のケースと前記平板状加熱手段間とを充填するシール材と、前記第一のケースもしくは前記第二のケースに設けられた入水口と、前記第一のケースもしくは前記第二のケースに設けられた出湯口と、前記第一のケースと前記第二のケースに設けられたシール材を挟み込む溝と、前記溝の一端から始まり、前記平板状加熱手段の発熱部を包囲し、前記溝の他端に達するシール部とを備え、前記第一のケースと前記第二のケースとを締結することにより、前記平板状加熱手段と前記第一のケースもしくは前記第二のケースとの間に水路を構成し、前記入水口と前記出湯口とを前記水路を介して連通する温水装置とすることにより、フランジ部をなくして、より一層のコンパクト化・薄型化を実現し、かつ組み立ても簡単なものとなる。 According to a first aspect of the present invention, there is provided a flat plate heating means having a heat generating portion and a terminal portion, a first case storing the flat plate heating means, a second case storing the flat plate heating means, and the flat plate. A sealing material that surrounds an intermediate outer periphery of the heat generating portion and the terminal portion of the heating means and fills the space between the first case or the second case and the flat plate heating means, and the first case Alternatively, a water inlet provided in the second case, a hot water outlet provided in the first case or the second case, and a sealing material provided in the first case and the second case And a seal portion that starts from one end of the groove, surrounds the heat generating portion of the flat plate heating means, and reaches the other end of the groove, and includes the first case and the second case. By fastening, the flat plate heating means and the front By forming a water channel between the first case or the second case and making the water inlet and the hot water outlet communicate with each other via the water channel, the flange portion is eliminated, and further This makes it possible to reduce the size and thickness of the product and make assembly easier.

第２の発明は、特に、第１の発明における水路は、前記第一のケースと前記第二のケースに設けられたリブと前記平板状加熱手段からなるもので、水路の断面積を小さくすることにより、流速を増大させ熱伝達率を大きくすることができるので、低吐水量においても熱効率の向上、高負荷化を行なうことができ、コンパクト化が図れる。   In the second invention, in particular, the water channel in the first invention comprises the first case, the rib provided in the second case, and the flat plate heating means, and the cross-sectional area of the water channel is reduced. Thus, since the flow rate can be increased and the heat transfer rate can be increased, the thermal efficiency can be improved and the load can be increased even at a low water discharge rate, and the size reduction can be achieved.

第３の発明は、特に、第１の発明における平板状加熱手段の発熱部を包囲するシール部は、前記第一のケースと前記第二のケースのうち一方に設けられた溶着リブと、前記第一のケースと前記第二のケースのうち他方に設けられた前記溶着リブに嵌合する第二の溝とからなることにより、さらに組み立ての簡略化が図れる。   In the third invention, in particular, the seal portion surrounding the heat generating portion of the flat plate heating means in the first invention is a welding rib provided in one of the first case and the second case, By comprising the first case and the second groove fitted to the welding rib provided on the other of the second case, the assembly can be further simplified.

第４の発明は、特に、第３の発明における平板状加熱手段の端子部周囲に前記第一のケースと前記第二のケースとの締結部を設けたことにより、第一のケースもしくは第二のケースと平板状加熱手段間とを充填するシール材の反発力を押さえ込み、第一のケースと第二のケースとをより強固に締結することができ、耐圧性が向上する。   In the fourth invention, in particular, by providing a fastening portion between the first case and the second case around the terminal portion of the flat plate heating means in the third invention, the first case or the second case is provided. The repulsive force of the sealing material filling between the case and the flat plate heating means can be suppressed, and the first case and the second case can be tightened more firmly, and the pressure resistance is improved.

以下、本発明の実施の形態について、図面を参照しながら説明する。なお、この実施の形態によって本発明が限定されるものではない。   Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

（実施の形態１）
図１、図２は本発明の実施の形態１における温水装置を示すものである。 (Embodiment 1)
1 and 2 show a hot water apparatus according to Embodiment 1 of the present invention.

図に示すように、温水装置１は、発熱部と端子部が分かれた平板状加熱手段２と、前記平板状加熱手段２を収納する第一のケース３と、前記平板状加熱手段２を収納する第二のケース４と、前記第一のケース３もしくは前記第二のケース４と前記平板状加熱手段２間とを充填するシール材５と、前記第一のケース３もしくは前記第二のケース４に設けられた入水口６と、前記第一のケース３もしくは前記第二のケース４に設けられた出湯口７と、前記第一のケース３と前記第二のケース４の少なくとも一方に設けられたシール材５を挟み込む溝８と、前記溝８の一端から始まり、前記平板状加熱手段２の発熱部を包囲し、前記溝８の他端に達するシール部９とを備え、前記第一のケース３と前記第二のケース４とを締結することにより、前記平板状加熱手段２と前記第一のケース３もしくは前記第二のケース４との間に水路１０を構成し、前記入水口６と前記出湯口７とを前記水路１０を介して連通するものである。また、平板状加熱手段２には、給電端子１１とそれに接続したリード線１２を有している。   As shown in the figure, the hot water device 1 stores a flat plate heating means 2 having a heat generating portion and a terminal portion, a first case 3 for storing the flat plate heating means 2, and the flat plate heating means 2. A second case 4 that seals, a sealing material 5 that fills the space between the first case 3 or the second case 4 and the flat plate heating means 2, and the first case 3 or the second case. Provided in at least one of the water inlet 6 provided in 4, the outlet 7 provided in the first case 3 or the second case 4, and the first case 3 and the second case 4. A groove 8 that sandwiches the sealing material 5 formed, and a seal portion 9 that starts from one end of the groove 8, surrounds the heat generating portion of the flat plate heating means 2, and reaches the other end of the groove 8, By fastening the case 3 and the second case 4, A water channel 10 is formed between the plate heating means 2 and the first case 3 or the second case 4, and the water inlet 6 and the hot water outlet 7 are communicated with each other via the water channel 10. is there. The flat plate heating means 2 has a power supply terminal 11 and a lead wire 12 connected thereto.

上記構成により、入水口６からケース内に流入した水は平板状加熱手段２の両面に分かれ、加熱された後、出湯口７より流出する。本実施の形態に示すように、温水装置１では、フランジ部が存在しないために、コンパクト化・薄型化が実現されている。また従来の
構成（図７）おいて、例えば、タンクの側面上にサーミスタや保安器などの部品や制御用基板を装着しようとする際の組み立てでは、まずタンクに平板状加熱手段を上から挿入し、フランジ部でビス止めした後、９０度回転させ、タンク４の側面を天面に持ってきて部品を装着していくこととなり、非常に手間がかかり、機械によるオートメーション化も複雑なものとなる。一方、本実施の形態では、第一のケース３もしくは第二のケース４を土台にして、順に平板状加熱手段２とシール材５、最後に他方のケースを層状に積み重ね第一のケース３と第二のケース４を締結するため、組み立ての方向が一方向からのみとなっており、簡便でオートメーション化も容易なものとなっている。 With the above configuration, the water flowing into the case from the water inlet 6 is divided into both sides of the flat plate heating means 2 and heated, and then flows out from the hot water outlet 7. As shown in the present embodiment, in the hot water device 1, since there is no flange portion, a reduction in size and thickness is realized. In the conventional configuration (FIG. 7), for example, when assembling components such as the thermistor and protector and the control board on the side of the tank, a flat plate heating means is first inserted into the tank from above. Then, after fixing with screws at the flange, it is rotated 90 degrees, the side of the tank 4 is brought to the top, and the parts are mounted, which is very laborious and complicated by machine automation. Become. On the other hand, in the present embodiment, the first case 3 or the second case 4 is used as a base, the plate-like heating means 2 and the sealing material 5 are sequentially stacked, and finally the other case is stacked in layers. Since the second case 4 is fastened, the assembly direction is only from one direction, which is simple and easy to automate.

なお、本実施の形態において、シール材５にはＯリングが考えられる。シール材５を挟み込む溝８の形状を工夫することで強固なシール性が実現できる。また、他のシール材として、第一のケース３もしくは第二のケース４にシリコンを注入する穴を空け、シール材を挟み込む溝８にシリコンを流し込む方法が考えられる。この方法では締結の際、平板状加熱手段２がシール材により圧力を受ける上記の方法と異なり、第一のケース３と第二のケース４を締結した後にシール材を流し込む方法であるので、平板状加熱手段２に余分な負荷を与えずに済む。   In the present embodiment, the sealing material 5 may be an O-ring. A strong sealing property can be realized by devising the shape of the groove 8 sandwiching the sealing material 5. As another sealing material, a method of forming a hole for injecting silicon into the first case 3 or the second case 4 and pouring silicon into the groove 8 sandwiching the sealing material is conceivable. This method is different from the above-described method in which the flat plate heating means 2 receives pressure by the sealing material at the time of fastening, and is a method in which the sealing material is poured after the first case 3 and the second case 4 are fastened. It is not necessary to apply an extra load to the heating means 2.

（実施の形態２）
図３、図４は、本発明の実施の形態２における温水装置を示すものである。実施の形態１と同一要素については、同一符号を付して説明を省略する。 (Embodiment 2)
3 and 4 show a hot water apparatus according to Embodiment 2 of the present invention. About the same element as Embodiment 1, the same code | symbol is attached | subjected and description is abbreviate | omitted.

本実施の形態においては、第一のケース３と第二のケース４内にリブ１３を設け、平板状加熱手段２との間にリブ１３を隔壁とした蛇行水路１４を構成しているものである。   In the present embodiment, a rib 13 is provided in the first case 3 and the second case 4, and a meandering water channel 14 having the rib 13 as a partition is formed between the flat heating means 2. is there.

上記構成により、入水口６からケース内に流入した水は、矢印のように、平板状加熱手段２の両面に分かれ、蛇行水路１４を通過し、加熱された後、出湯口７より流出する。   With the above configuration, the water flowing into the case from the water inlet 6 is divided into both sides of the flat plate heating means 2 as shown by the arrows, passes through the meandering water channel 14, is heated, and then flows out from the hot water outlet 7.

このように、平板状加熱手段２の両面に蛇行水路１４を形成する方式は、加熱流量が少ない場合などに極めて有効であるが、一般的に薄形矩形断面を持つ平板状加熱手段２をタンク内に収納し密閉した函体とするシール構造の形成が甚だ困難であった。本実施の形態に示す温水装置１では、平板状加熱手段２をシール材５ごと第一のケース３と第二のケース４とで包み込み、締結することでシールすることが可能となる。   As described above, the method of forming the meandering water channels 14 on both surfaces of the flat plate heating means 2 is extremely effective when the heating flow rate is small, but generally the flat plate heating means 2 having a thin rectangular cross section is used as a tank. It was extremely difficult to form a sealing structure that was housed in a sealed box. In the hot water device 1 shown in the present embodiment, the flat plate heating means 2 can be sealed by wrapping the sealing material 5 together with the first case 3 and the second case 4 and fastening them.

（実施の形態３）
図５は、本発明の実施の形態３における温水装置を示すものである。実施の形態１、２と同一要素については、同一符号を付して説明を省略する。 (Embodiment 3)
FIG. 5 shows a hot water apparatus according to Embodiment 3 of the present invention. The same elements as those in the first and second embodiments are denoted by the same reference numerals and description thereof is omitted.

本実施の形態においては、平板状加熱手段２の発熱部を包囲するシール部９を第一のケース３と第二のケース４とのうち一方に設けられた溶着リブ１５と、溶着リブ１５に嵌合し他方のケースに設けられた第二の溝１５ａとから構成している。第一のケース３と第二のケース４の締結手段に、溶着リブ１５の超音波溶着により、さらに組み立ての簡略化、高速化が図れる。   In the present embodiment, the sealing portion 9 surrounding the heat generating portion of the flat plate heating means 2 is attached to the welding rib 15 provided in one of the first case 3 and the second case 4, and the welding rib 15. The second groove 15a is fitted and provided in the other case. As a result of ultrasonic welding of the welding rib 15 to the fastening means of the first case 3 and the second case 4, the assembly can be further simplified and speeded up.

なお、本実施の形態においては、第一のケース３と第二のケース４の締結部として超音波溶着を用いたが、高周波溶着を用いる例も考えられる。高周波溶着では被加熱物の溶着する箇所のみを内部加熱させるため、平板状加熱手段２等の部品に及ぼす影響が最小限で済み、また溶着が短時間で済むのでバリの少ない美しい外観となる。また、他の方法として平板状加熱手段２の発熱部を包囲するシール部９を第一のケース３と第二のケース４とのうち少なくとも一方に設けられた溝にシリコンを流し込んで、締結およびシールする例も考えられる。   In the present embodiment, ultrasonic welding is used as a fastening portion between the first case 3 and the second case 4, but an example using high-frequency welding is also conceivable. In high frequency welding, only the portion to be heated is internally heated, so that the influence on parts such as the flat plate heating means 2 can be minimized, and the welding can be completed in a short time, resulting in a beautiful appearance with few burrs. As another method, the sealing portion 9 surrounding the heat generating portion of the flat plate heating means 2 is fastened by pouring silicon into a groove provided in at least one of the first case 3 and the second case 4. An example of sealing is also conceivable.

（実施の形態４）
図６は、本発明の実施の形態４における温水装置を示すものである。実施の形態１、２と同一要素については、同一符号を付して説明を省略する。 (Embodiment 4)
FIG. 6 shows a hot water apparatus according to Embodiment 4 of the present invention. The same elements as those in the first and second embodiments are denoted by the same reference numerals and description thereof is omitted.

本実施の形態においては、平板状加熱手段２の端子部周囲にも第一のケース３と第二のケース４との締結部として実施の形態３のような超音波溶着部１６を設けることにより、第一のケース３もしくは第二のケース４と平板状加熱手段２との間とを充填するシール材５の反発力を押さえ込み、第一のケース３と第二のケース４とをより強固に締結することができる。この締結部を設けることにより、高水圧化におけるケースの変形がある程度抑制され、より確実な水シールが実現される。   In the present embodiment, the ultrasonic welding portion 16 as in the third embodiment is provided as a fastening portion between the first case 3 and the second case 4 around the terminal portion of the flat plate heating means 2. The repulsive force of the sealing material 5 that fills the space between the first case 3 or the second case 4 and the flat plate heating means 2 is pressed down to make the first case 3 and the second case 4 stronger. Can be concluded. By providing this fastening portion, the deformation of the case in increasing the water pressure is suppressed to some extent, and a more reliable water seal is realized.

以上のように、本発明にかかる温水装置は、フランジ部をなくして、より一層のコンパクト化・薄型化を実現し、かつ組み立ても簡単なものとなるので、人体局部の洗浄用に使用する衛生洗浄装置等として有用である。   As described above, the hot water device according to the present invention eliminates the flange portion, realizes further downsizing and thinning, and is easy to assemble. It is useful as a cleaning device.

本発明の実施の形態１における温水装置の一部切り欠き斜視図The partially cutaway perspective view of the hot water device according to Embodiment 1 of the present invention 同温水装置の断面図Cross section of the hot water system 本発明の実施の形態２における温水装置の断面図Sectional drawing of the hot water apparatus in Embodiment 2 of this invention 同温水装置における垂直方向の断面図Cross-sectional view in the vertical direction of the same water heater 本発明の実施の形態３における温水装置の垂直方向の断面図Sectional drawing of the perpendicular direction of the hot water apparatus in Embodiment 3 of this invention 本発明の実施の形態４における温水装置の断面図Sectional drawing of the hot water apparatus in Embodiment 4 of this invention 従来の温水装置の概略構成図Schematic configuration diagram of a conventional hot water device

１ 温水装置
２ 平板状加熱手段
３ 第一のケース
４ 第二のケース
５ シール材
６ 入水口
７ 出湯口
８ シール材を挟み込む溝
９ シール部
１０ 水路
１１ 給電端子
１３ リブ
１５ 溶着リブ
１６ 超音波溶着部 DESCRIPTION OF SYMBOLS 1 Hot water apparatus 2 Flat plate heating means 3 1st case 4 2nd case 5 Sealing material 6 Water inlet 7 Outlet 8 Groove which pinches | interposes sealing material 9 Seal part 10 Water channel 11 Feeding terminal 13 Rib 15 Welding rib 16 Ultrasonic welding Part

Claims (4)

発熱部と端子部が分かれた平板状加熱手段と、
前記平板状加熱手段を収納する第一のケースと、
前記平板状加熱手段を収納する第二のケースと、
前記平板状加熱手段の前記発熱部と前記端子部との中間外周を包囲し、前記第一のケースもしくは前記第二のケースと前記平板状加熱手段間とを充填するシール材と、
前記第一のケースもしくは前記第二のケースに設けられた入水口と、
前記第一のケースもしくは前記第二のケースに設けられた出湯口と、
前記第一のケースと前記第二のケースに設けられたシール材を挟み込む溝と、
前記溝の一端から始まり、前記平板状加熱手段の発熱部を包囲し、前記溝の他端に達するシール部と、を備え、
前記第一のケースと前記第二のケースとを締結することにより、前記平板状加熱手段と前記第一のケースもしくは前記第二のケースとの間に水路を構成し、前記入水口と前記出湯口とを前記水路を介して連通する温水装置。 A flat plate heating means having a heat generating portion and a terminal portion separated;
A first case housing the flat plate heating means;
A second case for storing the flat plate heating means;
A sealing material that surrounds an intermediate outer periphery of the heat generating portion and the terminal portion of the flat plate heating means and fills the space between the first case or the second case and the flat plate heating device;
A water inlet provided in the first case or the second case;
A tap provided in the first case or the second case;
A groove for sandwiching a sealing material provided in the first case and the second case ;
A seal portion that starts from one end of the groove, surrounds the heat generating portion of the flat plate heating means, and reaches the other end of the groove,
By fastening the first case and the second case, a water channel is formed between the flat plate heating means and the first case or the second case, and the water inlet and the outlet are formed. A hot water apparatus that communicates with a gate through the water channel. 水路は、前記第一のケースと前記第二のケースに設けられたリブと前記平板状加熱手段からなる請求項１に記載の温水装置。   2. The hot water apparatus according to claim 1, wherein the water channel includes a rib provided in the first case, the second case, and the flat plate heating means. 平板状加熱手段の発熱部を包囲するシール部は、前記第一のケースと前記第二のケースのうち一方に設けられた溶着リブと、前記第一のケースと前記第二のケースのうち他方に設けられた前記溶着リブに嵌合する第二の溝とからなる請求項１に記載の温水装置。   The seal part surrounding the heat generating part of the flat plate heating means includes a welding rib provided in one of the first case and the second case, and the other of the first case and the second case. The hot water device according to claim 1, further comprising a second groove that fits into the welding rib provided on the surface. 平板状加熱手段の端子部周囲に前記第一のケースと前記第二のケースとの締結部を設けた請求項３に記載の温水装置。   The hot water apparatus according to claim 3, wherein a fastening portion between the first case and the second case is provided around the terminal portion of the flat plate heating means.
JP2003372490A 2003-10-31 2003-10-31 Water heater Expired - Fee Related JP4470450B2 (en)

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