JPH0456216B2 - - Google Patents
Info
- Publication number
- JPH0456216B2 JPH0456216B2 JP58136404A JP13640483A JPH0456216B2 JP H0456216 B2 JPH0456216 B2 JP H0456216B2 JP 58136404 A JP58136404 A JP 58136404A JP 13640483 A JP13640483 A JP 13640483A JP H0456216 B2 JPH0456216 B2 JP H0456216B2
- Authority
- JP
- Japan
- Prior art keywords
- sheathed heater
- outer tube
- heater
- wall
- sheathed
- 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
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 25
- 230000002159 abnormal effect Effects 0.000 description 5
- 238000013021 overheating Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/20—Arrangement or mounting of control or safety devices
- F24H9/2007—Arrangement or mounting of control or safety devices for water heaters
- F24H9/2014—Arrangement or mounting of control or safety devices for water heaters using electrical energy supply
- F24H9/2028—Continuous-flow heaters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H15/00—Control of fluid heaters
- F24H15/10—Control of fluid heaters characterised by the purpose of the control
- F24H15/128—Preventing overheating
- F24H15/132—Preventing the operation of water heaters with low water levels, e.g. dry-firing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H15/00—Control of fluid heaters
- F24H15/20—Control of fluid heaters characterised by control inputs
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H15/00—Control of fluid heaters
- F24H15/30—Control of fluid heaters characterised by control outputs; characterised by the components to be controlled
- F24H15/355—Control of heat-generating means in heaters
- F24H15/37—Control of heat-generating means in heaters of electric heaters
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Instantaneous Water Boilers, Portable Hot-Water Supply Apparatuses, And Control Of Portable Hot-Water Supply Apparatuses (AREA)
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、シーズヒータを熱源とした電気瞬間
湯沸器に関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an electric instantaneous water heater using a sheathed heater as a heat source.
従来例の構成とその問題点
従来の例えば第１図に示す電気瞬間湯沸器は、
外管１内にシーズヒータ２を内設し、シーズヒー
タ２は、外管１の両端に水密にロー付された冠板
３に水密にロー付されている。外管１の外壁に
は、温度過昇防止用のサーモ４が取付られてお
り、外管１の両側には、入水管５と出湯管６を水
密にロー付している。また水流を感知してシーズ
ヒータ２への通電を入切する圧力スイツチ７が設
置されている。Configuration of conventional example and its problems For example, the conventional electric instantaneous water heater shown in Fig. 1 has the following features:
A sheathed heater 2 is provided inside the outer tube 1, and the sheathed heater 2 is watertightly brazed to a crown plate 3 which is watertightly brazed to both ends of the outer tube 1. A thermostat 4 for preventing excessive temperature rise is attached to the outer wall of the outer pipe 1, and a water inlet pipe 5 and a hot water outlet pipe 6 are brazed on both sides of the outer pipe 1 in a watertight manner. Further, a pressure switch 7 is installed that senses the water flow and turns on/off the power supply to the sheathed heater 2.
電気瞬間湯沸器は、コツクを開いて通水すれば
連動して電熱ヒータが通電されるものであり、第
１図においては、入水管５から流入した水は、外
管１内に流入し、外管１とシーズヒータ２のすき
間を加熱されながら流れ出湯管６を通つて叶出さ
れる。また圧力スイツチ７が故障し入水管５から
水が流入しない停水の状態でシーズヒータ２が通
常状態にあるような異常過熱時には、サーモ４が
動作しシーズヒータ２への通電をストツプする。 In an electric instantaneous water heater, when the pot is opened and water is turned on, the electric heater is energized. In FIG. The hot water flows out through the pipe 6 while being heated through the gap between the outer pipe 1 and the sheathed heater 2. In addition, when the pressure switch 7 is out of order and the sheathed heater 2 is in a normal state under abnormal overheating conditions in which water does not flow in from the water inlet pipe 5 and the sheathed heater 2 is in a normal state, the thermostat 4 is activated to stop energizing the sheathed heater 2.
しかしながら、外壁１とシーズヒータ２の間に
水が存在するためシーズヒータ２からサーモ４へ
の熱伝導が悪く、サーモ４が動作するまでの時間
が長くかかり、シーズヒータ２が断線したり、本
体自身が高温になりケース等が発火したりする問
題があつた。 However, since water exists between the outer wall 1 and the sheathed heater 2, heat conduction from the sheathed heater 2 to the thermostat 4 is poor, and it takes a long time for the thermostat 4 to operate, causing the sheathed heater 2 to break or There was a problem that the device itself could become hot and the case etc. could catch fire.
発明の目的
本発明は上記従来の問題点を解消するもので、
シーズヒータの異常過熱時に、いち早くシーズヒ
ータへの通電をストツプし、シーズヒータの断線
や本体の発火等を防ぐことを目的とする。Purpose of the invention The present invention solves the above-mentioned conventional problems.
The purpose of this system is to quickly stop the power supply to the sheathed heater in the event of abnormal overheating of the sheathed heater to prevent disconnection of the sheathed heater and ignition of the main body.
発明の構成
上記目的を達成するため、本発明の電気瞬間湯
沸器は、シーズヒータと外管との間にシーズヒー
タ外壁と外管内壁に接するように、つる巻状の線
材を入れることによつてシーズヒータ異常加熱
時、シーズヒータから外壁に取付られたセンサへ
の熱伝導をよくする構成とした。Structure of the Invention In order to achieve the above object, the electric instantaneous water heater of the present invention includes a helical wire inserted between the sheathed heater and the outer tube so as to be in contact with the outer wall of the sheathed heater and the inner wall of the outer tube. Therefore, when the sheathed heater becomes abnormally heated, the structure is designed to improve heat conduction from the sheathed heater to the sensor attached to the outer wall.
実施例の説明
以下、本発明の一実施例について図面に基づい
て説明する。DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.
第２図において、１０はシーズヒータで外管９
に内設し、外管９の両端で水密にロー付された冠
板１１に水密にロー付する。入水管１３と出湯管
１４は、外管の両側に、それぞれ、水密にロー付
する。８はシーズヒータ１０の外壁と外管９の内
壁に接しつつ入水管１３付近から出湯管１４付近
までつる巻状に形成された線材である。４はシー
ズヒータ１０が異常加熱時、通電をストツプする
サーモで外管９の外壁に接して取付けてある。 In Fig. 2, 10 is a sheathed heater and an outer tube 9
It is installed inside the outer tube 9 and is watertightly brazed to the crown plate 11 which is watertightly brazed at both ends of the outer tube 9. The water inlet pipe 13 and the hot water outlet pipe 14 are watertightly brazed on both sides of the outer pipe. 8 is a wire rod formed in a helical shape from the vicinity of the water inlet pipe 13 to the vicinity of the hot water outlet pipe 14 while being in contact with the outer wall of the sheathed heater 10 and the inner wall of the outer pipe 9. Reference numeral 4 denotes a thermostat that stops electricity supply when the sheathed heater 10 becomes abnormally heated, and is attached in contact with the outer wall of the outer tube 9.
以下、上記構成における作用について、説明す
る。例えば圧力スイツチ１５が故障し、入水管１
３から水が流入しない停水の状態でシーズヒータ
１０が通電状態にあるような異常過熱時には、シ
ーズヒータ１０の熱は、線材８を介して外管９へ
伝えられ、サーモ１２へ伝えられる。一方正常時
は、先ず操作用のコツク（図示省略）を開くと入
水管１３から流入した水は、外管９内壁とシーズ
ヒータ１０外面と線材８とで形成されるつる巻状
の水路を加熱されながら出湯管１４へ向う。 The effects of the above configuration will be explained below. For example, if the pressure switch 15 malfunctions, the water inlet pipe 1
In the event of abnormal overheating, such as when the sheathed heater 10 is in an energized state with no water flowing in from the sheathed heater 3 , the heat of the sheathed heater 10 is transmitted to the outer tube 9 via the wire 8 and then to the thermostat 12 . On the other hand, under normal conditions, when the operating pot (not shown) is first opened, the water flowing in from the water inlet pipe 13 heats the helical water channel formed by the inner wall of the outer pipe 9, the outer surface of the sheathed heater 10, and the wire rod 8. Heading towards the hot water tap 14 while doing so.
このように本実施例によれば、シーズヒータ１
０異常加熱時には線材８を介して熱がサーモ１２
に伝えられるため熱伝達が早く、いち早くシーズ
ヒータ１０の異常温度上昇を感知し、シーズヒー
タ１０への通電をストツプするので、シーズヒー
タ１０の断線や本体ケースの発火を防止できる。
正常時は、外管９内の水路がつる巻状となり、熱
流路が増し放熱面積が増加するので熱効率が良く
なる。また電気瞬間湯沸器においては高ワツト化
と、コンパクト化が要求されこのような長管形状
の熱交換器は、ケースに納めるため曲げ加工され
るが、線材８の支持によつて曲げ加工後もシーズ
ヒータ１０と外管９外壁とが接することなく流路
形状も加工前と変わらないためシーズヒータ１０
の局部加熱がなくヒータ寿命が長くなる。 As described above, according to this embodiment, the sheathed heater 1
0 At the time of abnormal heating, heat is transferred to the thermostat 12 via the wire 8.
Since the heat transfer is fast, an abnormal temperature rise in the sheathed heater 10 is detected quickly, and the power supply to the sheathed heater 10 is stopped, so that disconnection of the sheathed heater 10 and ignition of the main body case can be prevented.
Under normal conditions, the water channel inside the outer tube 9 has a helical shape, increasing the number of heat flow paths and increasing the heat dissipation area, resulting in improved thermal efficiency. In addition, electric instantaneous water heaters are required to have high wattage and be compact, and such long tube-shaped heat exchangers are bent to fit into the case. However, since the sheathed heater 10 and the outer wall of the outer tube 9 do not come into contact with each other and the flow path shape remains the same as before processing, the sheathed heater 10
There is no local heating and the heater life is extended.
発明の効果
以上のように本発明によれば次の効果を得るこ
とができる。Effects of the Invention As described above, according to the present invention, the following effects can be obtained.
(1) 外管とシーズヒータの間の、つる巻状線材
が、シーズヒータの熱を外管へ伝えるため、シ
ーズヒータ異常加熱時、外管の外壁に取付けら
れているセンサが、いち早くシーズヒータの温
度上昇を感知しシーズヒータへの通電をストツ
プするので、シーズヒータの断線や本体ケース
の発火等を未然に防ぐことができる。(1) The helical wire between the outer tube and the sheathed heater transfers the heat of the sheathed heater to the outer tube, so when the sheathed heater becomes abnormally heated, the sensor attached to the outer wall of the outer tube will quickly turn off the sheathed heater. Since the sensor detects a temperature rise and stops energizing the sheathed heater, it is possible to prevent disconnection of the sheathed heater and ignition of the main body case.
(2) 外管内に形成される流路は、外管内壁とシー
ズヒータ外面と線材とによつて形成されたつる
巻状流路となり、熱流路が増し放熱面積が増加
するため、熱効率が良くなる。(2) The flow path formed inside the outer tube is a helical flow path formed by the inner wall of the outer tube, the outer surface of the sheathed heater, and the wire rod, increasing the heat flow path and increasing the heat dissipation area, resulting in high thermal efficiency. Become.
(3) 熱交換器の曲げ加工後も、線材の支持によつ
て流路が加工前とほとんど変わらずシーズヒー
タは外管のほぼ中央に位置しているため、シー
ズヒータの局部過熱がなくヒータ寿命が延び
る。(3) Even after bending the heat exchanger, the flow path is almost unchanged from before bending due to the support of the wire, and the sheathed heater is located almost in the center of the outer tube, so there is no local overheating of the sheathed heater and the heater Extends lifespan.
第１図は従来例を示す熱交換器の断面図、第２
図は本発明の一実施例である熱交換器の断面図で
ある。
８……線材、９……外管、１０……シーズヒー
タ、１１……冠板、１２……サーモ、１３……入
水管、１４……出湯管、１５……圧力スイツチ。
Figure 1 is a sectional view of a conventional heat exchanger;
The figure is a sectional view of a heat exchanger that is an embodiment of the present invention. 8... Wire rod, 9... Outer pipe, 10... Sheathed heater, 11... Crown plate, 12... Thermostat, 13... Water inlet pipe, 14... Hot water outlet pipe, 15... Pressure switch.
Claims (1)
ーズヒータと、このシーズヒータの外面に設けた
つる巻状の線材と、前記外管の外壁部で、前記線
材と対応する位置に設けた、温度過昇防止用のセ
ンサとを備え、前記線材はシーズヒータ外壁と、
外管内壁に接する構成とした電気瞬間湯沸器。1. An outer tube having a substantially circular cross section, a sheathed heater provided inside the outer tube, a helical wire rod provided on the outer surface of the sheathed heater, and a wire rod at a position corresponding to the wire rod on the outer wall of the outer tube. A sensor for preventing excessive temperature rise is provided, and the wire is connected to the outer wall of the sheathed heater,
An electric instantaneous water heater configured so that the outer tube is in contact with the inner wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58136404A JPS6026240A (en) | 1983-07-25 | 1983-07-25 | Electrical instantaneous hot-water heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58136404A JPS6026240A (en) | 1983-07-25 | 1983-07-25 | Electrical instantaneous hot-water heater |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6026240A JPS6026240A (en) | 1985-02-09 |
| JPH0456216B2 true JPH0456216B2 (en) | 1992-09-07 |
Family
ID=15174370
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58136404A Granted JPS6026240A (en) | 1983-07-25 | 1983-07-25 | Electrical instantaneous hot-water heater |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6026240A (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01106855U (en) * | 1988-01-06 | 1989-07-19 | ||
| JP2685505B2 (en) * | 1988-06-09 | 1997-12-03 | ディヴィッド アール エザリッジ | Method of connecting lead wire to heating element of fluid heating device |
| JPH0754759Y2 (en) * | 1988-10-13 | 1995-12-18 | 関西電力株式会社 | Heat exchanger for electric instant water heater |
| JP2008057855A (en) * | 2006-08-31 | 2008-03-13 | Matsushita Electric Ind Co Ltd | Fluid heating device and hot water supply device using the same |
| JP5724506B2 (en) * | 2010-03-31 | 2015-05-27 | Toto株式会社 | Heat exchanger and sanitary washing apparatus provided with the same |
| JP5934899B2 (en) * | 2011-05-20 | 2016-06-15 | パナソニックＩｐマネジメント株式会社 | Steam superheater and rice cooker |
-
1983
- 1983-07-25 JP JP58136404A patent/JPS6026240A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6026240A (en) | 1985-02-09 |
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