JPH03170747A - Hot-water supplier with scale constituent removing device - Google Patents
Hot-water supplier with scale constituent removing deviceInfo
- Publication number
- JPH03170747A JPH03170747A JP1307732A JP30773289A JPH03170747A JP H03170747 A JPH03170747 A JP H03170747A JP 1307732 A JP1307732 A JP 1307732A JP 30773289 A JP30773289 A JP 30773289A JP H03170747 A JPH03170747 A JP H03170747A
- Authority
- JP
- Japan
- Prior art keywords
- scale
- water
- heat exchanger
- electrode
- constituent
- 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.)
- Pending
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 61
- 239000000470 constituent Substances 0.000 title abstract 8
- 238000001556 precipitation Methods 0.000 claims description 13
- 239000000567 combustion gas Substances 0.000 claims description 8
- 238000000034 method Methods 0.000 claims 1
- 239000008400 supply water Substances 0.000 abstract 5
- 230000008021 deposition Effects 0.000 abstract 2
- 238000010276 construction Methods 0.000 abstract 1
- 238000002485 combustion reaction Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000011777 magnesium Substances 0.000 description 2
- 239000002244 precipitate Substances 0.000 description 2
- NWUYHJFMYQTDRP-UHFFFAOYSA-N 1,2-bis(ethenyl)benzene;1-ethenyl-2-ethylbenzene;styrene Chemical compound C=CC1=CC=CC=C1.CCC1=CC=CC=C1C=C.C=CC1=CC=CC=C1C=C NWUYHJFMYQTDRP-UHFFFAOYSA-N 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 239000003456 ion exchange resin Substances 0.000 description 1
- 229920003303 ion-exchange polymer Polymers 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 239000012716 precipitator Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 235000020681 well water Nutrition 0.000 description 1
- 239000002349 well water Substances 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D19/00—Details
- F24D19/0092—Devices for preventing or removing corrosion, slime or scale
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は，家庭用給湯器，高温さし湯付家庭用給湯器，
及び蒸気さし湯付家庭用給湯器など、燃焼ガスの流路中
に燃焼ガスと水との熱交換器を設けた給湯器において、
上記熱交換器の水管内にスケールが付着しないように改
良した給湯器に関するものである。[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a domestic water heater, a domestic water heater with high-temperature hot water,
In water heaters that have a heat exchanger between combustion gas and water in the flow path of combustion gas, such as domestic water heaters with steam hot water,
The present invention relates to a water heater improved to prevent scale from adhering to the water pipes of the heat exchanger.
この種の家庭用給湯器は一般に、ガスバーナで発生した
高温の燃焼ガスの流路内に熱交換器を設け、上記熱交換
器に給水された水を加熱する構成である．
第４図は家庭用給湯器の従来例を示し、模式的に描いた
断面図である．
燃焼胴１の下方にファン２が設けられていて、燃焼用空
気を供給する．燃料ガスは電磁弁３およびマニホールド
４を経て供給され、ガスバーナ５で燃焼せしめられる。This type of domestic water heater generally has a structure in which a heat exchanger is installed in the flow path of high-temperature combustion gas generated by a gas burner, and the water supplied to the heat exchanger is heated. Figure 4 shows a conventional example of a domestic water heater, and is a schematic cross-sectional view. A fan 2 is provided below the combustion shell 1 to supply combustion air. Fuel gas is supplied via a solenoid valve 3 and a manifold 4, and is combusted by a gas burner 5.
上記の燃焼で発生した高温の燃焼ガスは矢印ａの如く流
動し、排出される。The high temperature combustion gas generated in the above combustion flows as shown by arrow a and is discharged.
上記の燃焼ガスの流路内に、燃焼ガスと水との熱交換器
６が設けられている．
給水は、給水口７，給水配管８を経て上記の熱交換器６
に供給され、該熱交換器の木管６ａ内を流動する間に燃
焼ガスによって加熱されて昇温し、給湯される，
〔発明が解決しようとする課題〕
家庭用給湯器の水源として利用される水道水や井戸水等
には．ｍ度の大小はあるが、カルシウム，マグネシウム
などの酸化物や炭酸化物等、いわゆる硬度戒分が含まれ
ている。さらに，蒸発残査として検出されるシリカ等も
溶解している。A heat exchanger 6 between the combustion gas and water is provided in the combustion gas flow path. Water is supplied to the heat exchanger 6 through the water supply port 7 and water supply pipe 8.
[Problem to be solved by the invention] Used as a water source for a domestic water heater. For tap water, well water, etc. Although there are varying degrees of hardness, it contains oxides and carbonates of calcium, magnesium, and other so-called hardness compounds. Furthermore, silica and other substances detected as evaporation residues are also dissolved.
これらの成分を含んだ水が熱交換器で加熱されて高温に
なると溶解度が減少するので、溶解していた成分が水管
の内壁面に析出してスケールを形或する。When water containing these components is heated in a heat exchanger to a high temperature, the solubility decreases, and the dissolved components precipitate on the inner wall surface of the water pipe, forming scale.
水管内にスケールが堆積すると熱電導を妨げて熱交換効
率を低下させたり、局部的な過熱個所ができて熱交換器
の耐久性を損ねたりする。When scale builds up inside water pipes, it impedes heat conduction, reducing heat exchange efficiency, and creates localized overheating spots, impairing the durability of the heat exchanger.
更に，高温さし湯付の場合や、蒸気さし湯付の場合は，
給水中に溶解していた成分の一部が熱交換器を出た後の
配湯管路中の狭い部分に析出して流通抵抗を増加させる
という問題もある。In addition, if you have a high-temperature hot water bath or a steam hot water bath,
There is also the problem that a part of the components dissolved in the water supply is deposited in a narrow portion of the hot water pipe after exiting the heat exchanger, increasing flow resistance.
このようなスケール堆積の対策として、大型の業務用ボ
イラや工業用ボイラでは、イオン交換樹脂を用いた給水
処理設備が設けられているが、家庭用給湯器においては
、小形，軽量，安価であることが求められ、また，メン
テイナンスの容易であることを必要とするので、従来の
家庭用給湯器（さし湯付のものを含む）にはスケール付
着防止手段が設けられていなかった。As a countermeasure against such scale accumulation, large commercial and industrial boilers are equipped with water treatment equipment that uses ion exchange resin, but domestic water heaters are equipped with water treatment equipment that is small, lightweight, and inexpensive. Conventional home water heaters (including those with hot water) have not been provided with scale adhesion prevention means because of the need for easy maintenance.
本発明は、上記の如き従来技術の問題点を改善し、簡単
な手段により給水中のスケール成分を確実に除去するこ
とができるスケール除去装置付給湯器を提供せんとする
ものである。The present invention aims to improve the problems of the prior art as described above, and to provide a water heater with a scale removal device that can reliably remove scale components in water supply by a simple means.
上記の目的を達或するため、本発明は、熱交換樹の給水
入口側の配管に、電位差を２Ｖ以上とした電極式スケー
ル成分沈殿析出装置を介挿接続すると共に，その下流側
にスケール成分捕捉器を設け、かつ、前記スケール成分
沈殿析出装置の電極の電位をある設定時間毎に反転させ
るようにしたことを特徴とする。In order to achieve the above object, the present invention connects an electrode-type scale component precipitation device with a potential difference of 2V or more to the piping on the water supply inlet side of the heat exchange tree, and at the same time, a scale component precipitation device is inserted and connected to the pipe on the water supply inlet side of the heat exchange tree. The present invention is characterized in that a trap is provided and the potential of the electrode of the scale component precipitation device is reversed at every set time.
給水中のＣｕ”．Ｍｇ”、Ｓｕｎ”十などのスケール生
成物例えばＣｕ”＋は給水中ではＣｕ（Ｈ Ｃ ０３）
２として存在しているが、電位差を２ｖ以上とした電極
式スケール成分沈殿析出装置において電気分解作用を受
けてスケール成分が陰極に引き寄せられ，かつ，その陰
極のまわりはｐＨが上昇しているので，
としでもはやイオンとして存在し得なくなって沈殿する
。Scale products such as Cu".Mg" and Sun"+ in the feed water, such as Cu"
However, in an electrode-type scale component precipitation device with a potential difference of 2V or more, scale components are attracted to the cathode by electrolysis, and the pH around the cathode increases. , it can no longer exist as an ion and precipitates.
また、前記スケール成分の一部は電極の表面に析出する
が，本発明においては、電極の電位をある設定時間毎に
反転させるので，その反転により析出したスケール成分
を電極の表面から剥離させる。Further, some of the scale components are deposited on the surface of the electrode, but in the present invention, the potential of the electrode is reversed at certain set time intervals, so that the precipitated scale component is peeled off from the surface of the electrode by the reversal.
そしてこのようにして沈殿ないし析出したスケール成分
は、スケール捕捉器により捕捉され、例えばフィルター
を定期的に交換することにより取り除くことができる。The scale components precipitated or precipitated in this way are captured by a scale trap and can be removed, for example, by periodically replacing the filter.
第１図は本発明のスケール成分除去装置付給湯器の一実
施例を示す断面図である。FIG. 1 is a sectional view showing an embodiment of a water heater with a scale component removing device according to the present invention.
この実施例は、第４図に示す従来例に本発明を適用した
ものであって、第４図と同一の図、面参照番号を付した
ものは従来例におけると同様乃至は類似の部分である．
熱交換器６の上流側に接続されている給水配管８の途中
に，電位差を２ｖ以上とした電極式スケール成分沈殿析
出装置９と，スケール捕捉器１０とを介挿接続する．な
お、１１は電源回路である．第２図は、前記スケール成
分沈殿析出装置９およびスケール成分捕捉器１０並びに
電源回路１１の具体例を示すものである。In this embodiment, the present invention is applied to the conventional example shown in FIG. 4, and the same drawings and plane reference numbers as in FIG. 4 are the same or similar parts as in the conventional example. be. An electrode-type scale component precipitation device 9 with a potential difference of 2 V or more and a scale trap 10 are inserted and connected in the middle of the water supply pipe 8 connected to the upstream side of the heat exchanger 6. Note that 11 is a power supply circuit. FIG. 2 shows a specific example of the scale component precipitation device 9, scale component trap 10, and power supply circuit 11.
電極式スケール成分沈殿析出装置９は、ケース９ａの内
面に電気絶縁層９ｂを介して一方の電極９ｃを配設する
と共にケース９ａの中心に杆状の他方の電極９ｄを配設
する．電極９ｃ，９ｄは各種の金属，半導体，炭素など
により構或する。The electrode type scale component precipitation device 9 has one electrode 9c disposed on the inner surface of a case 9a with an electrically insulating layer 9b interposed therebetween, and the other rod-shaped electrode 9d disposed in the center of the case 9a. The electrodes 9c and 9d are made of various metals, semiconductors, carbon, etc.
そして、前記の電極９０と９ｄとに、電源回路１１を介
して２．ＯＶ−１２Ｖの電圧をある設定時間毎に極性を
反転させて印加する．図示の例は，商用電源１１ａを使
用した例を示すもので、トランスｌｌｂにより降圧し、
ブリッジダイオードｌｉｅにより整流した後定電圧回路
ｌｉｄにより設定電圧となし，かつ、極性反転回路ｌｉ
ｅにより第３図に示すようにｔ２＝０．５秒毎に極性を
反転させた電圧をｊ１＝１．５秒間づつ印加させる。な
お、本発明は前記の如き商用電源を使用するものに限定
されるものではなく，電池（充電式を含む）を電源とす
ることもできる．
また，スケール成分捕捉器１０は，例えば、ケースｌｌ
ａにフィルター１ｌｂを着脱自在に装着すると共に、蓋
１０ｃを取外してスケールを除去すると共に必要に応じ
フィルター１ｌｂを交換し得るように構成する。Then, 2. A voltage of OV-12V is applied with the polarity reversed every set time. The illustrated example uses a commercial power supply 11a, and the voltage is stepped down by a transformer llb.
After rectification by the bridge diode lie, the voltage is set to the set voltage by the constant voltage circuit lid, and the polarity inversion circuit li
As shown in FIG. 3, by e, a voltage whose polarity is reversed every t2=0.5 seconds is applied for j1=1.5 seconds. Note that the present invention is not limited to using a commercial power source as described above, but can also be powered by a battery (including a rechargeable type). In addition, the scale component capture device 10 may, for example,
The filter 1lb is removably attached to a, the lid 10c is removed to remove scale, and the filter 1lb can be replaced as necessary.
以上のように構威された給湯器においては、熱交換器６
の水管に流入する給水は，電極式スケール成分沈殿析出
装置９において前記作用の項において述べた如くしてス
ケール成分が沈殿および析出し、また電極９ｃ，９ｄに
析出したスケール成分は極性が反転する毎に電極から剥
離され，かくして電極の表面が常に新たな面となるよう
に更新され乍ら給水中のスケール成分を除去し，かくし
て給水中から除去されたスケール成分をフィルター１０
ｂにより濾過してスケール成分のない給水を熱交換器６
の水管に供給するので、熱交換器の水管やその後の給湯
配管にスケールが堆積するのを確実に防止することがで
きる。In the water heater configured as described above, the heat exchanger 6
In the feed water flowing into the water pipe, the scale components are precipitated and precipitated in the electrode-type scale component precipitator 9 as described in the operation section, and the polarity of the scale components deposited on the electrodes 9c and 9d is reversed. The scale components in the water supply are removed from the electrode each time, and the surface of the electrode is constantly updated to a new surface.
The feed water filtered by b and free of scale components is transferred to the heat exchanger 6.
Since the water is supplied to the water pipes of the heat exchanger, it is possible to reliably prevent scale from accumulating on the water pipes of the heat exchanger and subsequent hot water supply piping.
以上説明したように、本発明は、電極式スケール成分沈
殿析出装置およびスケール捕捉器を熱交換器の木管の給
水入口側配管中に介挿接続するという簡単な構成で、熱
交換器の水管内などにスケールが堆積することを防止す
ることができ、これによりスケール付着による熱交換器
の効率低下や、スケール付着による耐用命数の短縮を未
然に防止することができる効果がある。As explained above, the present invention has a simple configuration in which an electrode type scale component precipitation device and a scale trap are inserted and connected to the water supply inlet side pipe of the wood pipe of the heat exchanger. It is possible to prevent scale from accumulating on the heat exchanger, etc., thereby having the effect of preventing a reduction in efficiency of the heat exchanger due to scale adhesion and a shortening of the service life due to scale adhesion.
第１図は本発明のスケール成分除去装置付給湯器の一実
施例を示す模式的な断面図、第２図は上記実施例に用い
た電極式スケール成分沈殿析出装置およびスケール捕捉
器の説明図，第３図は電極式スケール成分沈殿析出装置
に与える電圧の一例を示す図、第４図は従来例の家庭用
給湯器を示す模式的な断面図であ′る。
１・・・燃焼胴，２・・・ファン、５・・・ガスバーナ
、６・・・熱交換器、６ａ・・・熱交換器の水管，８・
・・給水配管、９・・・電極式スケール成分沈殿析出装
置、１ｏ・・・スケール成分捕捉器． １１・・・電源
回路。Fig. 1 is a schematic sectional view showing an embodiment of a water heater with a scale component removing device of the present invention, and Fig. 2 is an explanatory diagram of an electrode type scale component precipitation device and a scale trap used in the above embodiment. , FIG. 3 is a diagram showing an example of the voltage applied to the electrode type scale component precipitation device, and FIG. 4 is a schematic cross-sectional view showing a conventional domestic water heater. DESCRIPTION OF SYMBOLS 1... Combustion shell, 2... Fan, 5... Gas burner, 6... Heat exchanger, 6a... Water pipe of heat exchanger, 8...
...Water supply piping, 9...Electrode type scale component precipitation device, 1o...Scale component trap. 11...Power supply circuit.
Claims (1)
けた給湯器において、上記熱交換器の給水入口側の配管
に、電位差を２Ｖ以上に設定した電極式スケール成分沈
殿析出装置を介挿接続すると共に、その下流側にスケー
ル成分捕捉器を設け、かつ、前記スケール成分沈殿析出
装置の電極の電位をある設定時間毎に反転させることを
特徴とするスケール成分除去装置付給湯器。1. In a water heater equipped with a heat exchanger between the combustion gas and water in the flow path of the combustion gas, an electrode-type scale component precipitation method with a potential difference set to 2 V or more is applied to the piping on the water supply inlet side of the heat exchanger. A hot water supply with a scale component removal device, characterized in that the device is inserted and connected, a scale component trap is provided on the downstream side thereof, and the potential of the electrode of the scale component precipitation device is reversed at every set time. vessel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1307732A JPH03170747A (en) | 1989-11-29 | 1989-11-29 | Hot-water supplier with scale constituent removing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1307732A JPH03170747A (en) | 1989-11-29 | 1989-11-29 | Hot-water supplier with scale constituent removing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03170747A true JPH03170747A (en) | 1991-07-24 |
Family
ID=17972596
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1307732A Pending JPH03170747A (en) | 1989-11-29 | 1989-11-29 | Hot-water supplier with scale constituent removing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03170747A (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003021401A (en) * | 2001-07-09 | 2003-01-24 | Hitachi Chem Co Ltd | Wall-through combustion equipment |
| JP2008049245A (en) * | 2006-08-23 | 2008-03-06 | Fuji Electric Retail Systems Co Ltd | Water softener |
| WO2010092852A1 (en) * | 2009-02-16 | 2010-08-19 | 三菱電機株式会社 | Water heater |
| JP2010221102A (en) * | 2009-03-23 | 2010-10-07 | Sanyo Electric Co Ltd | Water treatment apparatus |
| JP2011226697A (en) * | 2010-04-19 | 2011-11-10 | Mitsubishi Electric Corp | Water heater |
| WO2013038692A1 (en) | 2011-09-15 | 2013-03-21 | ダイキン工業株式会社 | Heat pump hot-water supply device |
| EP2600070A1 (en) * | 2011-12-02 | 2013-06-05 | Mitsubishi Electric Corporation | Scale inhibiting device, water heater and water consumptive apparatus |
| WO2013084482A1 (en) * | 2011-12-07 | 2013-06-13 | ダイキン工業株式会社 | Electrolysis device and heat pump water heater provided with same |
| US10197293B2 (en) | 2014-03-03 | 2019-02-05 | Mitsubishi Electric Corporation | Scale trapping unit and water heater |
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|---|---|---|---|---|
| JPS5541724B2 (en) * | 1977-04-20 | 1980-10-25 | ||
| JPS61181591A (en) * | 1985-02-07 | 1986-08-14 | Fusamori Kogyo Kk | Water treating device for removing electrical scale and water treatment |
-
1989
- 1989-11-29 JP JP1307732A patent/JPH03170747A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5541724B2 (en) * | 1977-04-20 | 1980-10-25 | ||
| JPS61181591A (en) * | 1985-02-07 | 1986-08-14 | Fusamori Kogyo Kk | Water treating device for removing electrical scale and water treatment |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003021401A (en) * | 2001-07-09 | 2003-01-24 | Hitachi Chem Co Ltd | Wall-through combustion equipment |
| JP2008049245A (en) * | 2006-08-23 | 2008-03-06 | Fuji Electric Retail Systems Co Ltd | Water softener |
| JP5383716B2 (en) * | 2009-02-16 | 2014-01-08 | 三菱電機株式会社 | Scale depositing device and water heater |
| WO2010092852A1 (en) * | 2009-02-16 | 2010-08-19 | 三菱電機株式会社 | Water heater |
| CN102317704A (en) * | 2009-02-16 | 2012-01-11 | 三菱电机株式会社 | Water heater |
| US8840785B2 (en) | 2009-02-16 | 2014-09-23 | Mitsubishi Electric Corporation | Scale deposition device and water heater |
| JP2010221102A (en) * | 2009-03-23 | 2010-10-07 | Sanyo Electric Co Ltd | Water treatment apparatus |
| JP2011226697A (en) * | 2010-04-19 | 2011-11-10 | Mitsubishi Electric Corp | Water heater |
| WO2013038692A1 (en) | 2011-09-15 | 2013-03-21 | ダイキン工業株式会社 | Heat pump hot-water supply device |
| JP2013117069A (en) * | 2011-12-02 | 2013-06-13 | Mitsubishi Electric R & D Centre Europe Bv | Scale inhibiting device, water heater and water consumptive apparatus |
| EP2600070A1 (en) * | 2011-12-02 | 2013-06-05 | Mitsubishi Electric Corporation | Scale inhibiting device, water heater and water consumptive apparatus |
| JP2013119054A (en) * | 2011-12-07 | 2013-06-17 | Daikin Industries Ltd | Electrolyzer and heat pump water heater including the same |
| WO2013084482A1 (en) * | 2011-12-07 | 2013-06-13 | ダイキン工業株式会社 | Electrolysis device and heat pump water heater provided with same |
| US10197293B2 (en) | 2014-03-03 | 2019-02-05 | Mitsubishi Electric Corporation | Scale trapping unit and water heater |
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