JP2001033099A - Bath system provided with hot water supply apparatus - Google Patents
Bath system provided with hot water supply apparatusInfo
- Publication number
- JP2001033099A JP2001033099A JP11203147A JP20314799A JP2001033099A JP 2001033099 A JP2001033099 A JP 2001033099A JP 11203147 A JP11203147 A JP 11203147A JP 20314799 A JP20314799 A JP 20314799A JP 2001033099 A JP2001033099 A JP 2001033099A
- Authority
- JP
- Japan
- Prior art keywords
- bath
- hot water
- burner
- combustion
- water supply
- 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.)
- Granted
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 187
- 238000009833 condensation Methods 0.000 claims abstract description 65
- 238000002485 combustion reaction Methods 0.000 claims abstract description 62
- 230000005494 condensation Effects 0.000 claims abstract description 59
- 239000000446 fuel Substances 0.000 claims description 20
- 238000010438 heat treatment Methods 0.000 claims description 18
- 230000005611 electricity Effects 0.000 claims description 2
- 230000003111 delayed effect Effects 0.000 abstract 1
- 238000003303 reheating Methods 0.000 description 18
- 238000010079 rubber tapping Methods 0.000 description 7
- 230000007423 decrease Effects 0.000 description 5
- 238000011144 upstream manufacturing Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 3
- KNZUAMRYQXIWSR-RUAUHYFQSA-N curan Chemical compound C1=CC=C2[C@@]3([C@@H]4C5)CCN4C[C@@H](CC)[C@H]5[C@@H](C)[C@@H]3NC2=C1 KNZUAMRYQXIWSR-RUAUHYFQSA-N 0.000 description 3
- 230000002265 prevention Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000010926 purge Methods 0.000 description 2
- 238000003287 bathing Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 239000003350 kerosene Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
Landscapes
- Control For Baths (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は給湯器付風呂装置に関
し、詳しくは、給湯バーナと風呂バーナとへの燃料供給
の調整に共通の比例弁を用いる給湯器付風呂装置に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bath apparatus with a water heater, and more particularly, to a bath apparatus with a water heater using a common proportional valve for adjusting fuel supply to a hot water burner and a bath burner.
【０００２】[0002]
【従来の技術】一般に、給湯器と風呂釜（追焚器）とを
備えた給湯器付風呂装置においては、部品点数を減らし
て製品コストを下げると共に装置を小型化するために、
給湯バーナと風呂バーナとへのガス供給量の調整に共通
の比例弁を用いるものが知られており、各バーナの同時
燃焼時には、給湯器の温度制御を優先して比例弁の開度
を決めて各バーナへガスを供給し、給湯温度を所定温度
に制御するものがある。2. Description of the Related Art Generally, in a bath apparatus with a water heater provided with a water heater and a bath kettle (reheating unit), in order to reduce the number of parts to reduce product cost and downsize the apparatus,
It is known that a common proportional valve is used for adjusting the gas supply amount to the hot water supply burner and the bath burner.When simultaneous combustion of each burner is performed, the opening of the proportional valve is determined by giving priority to the temperature control of the water heater. To supply gas to each burner to control the hot water supply temperature to a predetermined temperature.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、こうし
た給湯器付風呂装置では、給湯運転と追焚運転とが同時
に行われると、給湯運転に合わせて比例弁の開度が制御
されるため、この開度が小さい場合には風呂バーナへの
ガス量もそれに伴って減少し、風呂釜が単独で運転する
場合に比べて少なくなる。従ってこうしたケースでは、
風呂釜の加熱量が少なくなるため、特に浴槽水が冷たい
場合には、風呂釜の熱交換器で加熱された循環水の出湯
温があまり高くならないため、燃焼排気中の水蒸気が風
呂熱交換器に冷却されて結露し、ドレンを発生してい
た。そこで、特許公報第２５０１０５０号で知られてい
る追焚機能付き給湯器は、図４のフローチャートに示す
ように、給湯バーナと風呂バーナとの同時燃焼中に、風
呂熱交換器に結露する可能性があると判定した（Ｓ１
１）場合、風呂バーナを消火して追焚運転を停止し（Ｓ
１２）、給湯運転が停止するまで風呂バーナを燃焼させ
ないようにして（Ｓ１３）、結露防止を図っている。と
ころが、この給湯器は、給湯運転中となる追焚待機中に
浴槽内の湯が冷め続け、追焚に時間がかかってしまうと
いう不具合があった。そこで、本発明の給湯器付風呂装
置は上記課題を解決し、結露を防止すると共に、追焚時
間を短縮することを目的とする。However, in such a bath apparatus with a water heater, when the hot water supply operation and the additional heating operation are performed simultaneously, the opening of the proportional valve is controlled in accordance with the hot water supply operation. When the degree is small, the amount of gas to the bath burner also decreases accordingly, which is smaller than when the bath kettle is operated alone. So in these cases,
Since the amount of heat in the bath is reduced, especially when the bath water is cold, the temperature of the circulating water heated by the heat exchanger in the bath does not become too high, so the steam in the combustion exhaust gas is removed by the bath heat exchanger. And was condensed and drained. Therefore, the hot water supply device with the additional heating function known from Japanese Patent Publication No. 2501050 has a possibility of dew condensation on the bath heat exchanger during simultaneous combustion of the hot water supply burner and the bath burner, as shown in the flowchart of FIG. (S1)
1) In the case, the bath burner is extinguished and the reheating operation is stopped (S
12), the bath burner is not burned until the hot water supply operation is stopped (S13) to prevent dew condensation. However, this water heater has a problem in that the hot water in the bathtub keeps cooling during standby for additional heating during the hot water supply operation, and it takes time for additional heating. Then, the bath apparatus with a water heater of this invention solves the said subject, and it aims at preventing dew condensation and shortening reheating time.
【０００４】[0004]
【課題を解決するための手段】上記課題を解決する本発
明の請求項１記載の給湯器付風呂装置は、給湯バーナの
燃焼熱により通水を目標温度になるよう加熱制御して出
湯する給湯器と、風呂バーナの燃焼熱により浴槽水を循
環加熱する風呂釜と、上記給湯バーナへの燃料供給路を
開閉する給湯開閉弁と、上記風呂バーナへの燃料供給路
を開閉する風呂開閉弁と、通電量に応じて上記各バーナ
への燃料量を調整する共通の比例弁とを備え、上記各バ
ーナを同時に燃焼する場合には上記給湯器の加熱制御を
優先して上記比例弁により燃料量を調整する給湯器付風
呂装置において、上記各バーナを同時に燃焼する時に上
記風呂釜に結露の可能性があるか否かを判定する結露判
定手段を設け、上記結露判定手段により上記風呂釜に結
露の可能性があることを判定した場合には、上記風呂バ
ーナの燃焼を一旦停止し、所定時間後に該風呂バーナの
燃焼を再開して、再び該結露判定手段により判定するこ
とを要旨とする。According to a first aspect of the present invention, there is provided a bath apparatus with a water heater, wherein the hot water supply is controlled by heating the hot water by a combustion heat of a hot water supply burner to reach a target temperature. A bath, a bath kettle for circulating and heating bathtub water by the heat of combustion of the bath burner, a hot water supply opening / closing valve for opening / closing a fuel supply passage to the hot water supply burner, and a bath opening / closing valve for opening / closing a fuel supply passage to the bath burner. A common proportional valve that adjusts the amount of fuel to each of the burners in accordance with the amount of electricity supplied, and when the burners are simultaneously burned, giving priority to the heating control of the water heater and controlling the amount of fuel by the proportional valve. In the bath apparatus with a water heater for adjusting the temperature, there is provided dew condensation determining means for determining whether there is a possibility of dew condensation on the bath kettle when simultaneously burning the burners, and the dew condensation determining means forms dew on the bath kettle. May be When determining the door stops once the burning of the bath burner and restart the combustion of the bath burner after a predetermined time, and subject matter to be determined again by the condensation determining means.
【０００５】また、本発明の請求項２記載の給湯器付風
呂装置は、請求項１記載の給湯器付風呂装置において、
上記風呂バーナの燃焼を停止させている上記所定時間内
に、給湯バーナへの燃料量が所定値以上もしくは該給湯
バーナの燃焼が停止した場合には、該所定時間の経過を
待たずに上記風呂バーナの燃焼を再開することを要旨と
する。[0005] A bath apparatus with a water heater according to a second aspect of the present invention is the bath apparatus with a water heater according to the first aspect,
If the fuel amount to the hot water supply burner is equal to or more than a predetermined value or the combustion of the hot water supply burner is stopped within the predetermined time during which the combustion of the bath burner is stopped, the bath is not waited for the predetermined time to elapse. The point is to restart the burner combustion.
【０００６】また、本発明の請求項３記載の給湯器付風
呂装置は、請求項１または２記載の給湯器付風呂装置に
おいて、上記結露判定手段は、上記風呂釜で加熱された
湯温に基づいて判定することを要旨とする。According to a third aspect of the present invention, there is provided a bath apparatus with a water heater according to the first or second aspect, wherein the dew-condensation determining means determines a temperature of the hot water heated by the bath kettle. The gist is to make a determination based on this.
【０００７】また、本発明の請求項４記載の給湯器付風
呂装置は、請求項１または２記載の給湯器付風呂装置に
おいて、上記結露判定手段は、上記風呂バーナの燃焼量
と上記浴槽からの湯温とに基づいて判定することを要旨
とする。According to a fourth aspect of the present invention, in the bath apparatus with a water heater according to the first or second aspect, the dew-condensation determining means determines the amount of combustion of the bath burner and the bathtub. The gist is that the determination is made based on the hot water temperature.
【０００８】上記構成を有する本発明の請求項１記載の
給湯器付風呂装置は、給湯バーナと風呂バーナとの同時
燃焼の場合には、給湯バーナへの燃料量に合わせて共通
の比例弁の開度を制御する。この開度が小さいと風呂バ
ーナへの燃料量もそれに伴って減少し、風呂熱交換器の
温度が低下し、燃焼排気中の水蒸気が結露し易くなる。
結露判定手段により風呂釜に結露の可能性があることを
判定した場合には、風呂開閉弁を一旦閉じ風呂バーナの
燃焼を停止して結露を防止する。所定時間が経過する
と、風呂熱交換器付近には水蒸気が殆ど存在しなくな
り、結露しにくい状態に戻るため、給湯バーナが動作中
であっても風呂バーナの燃焼を再開して追焚をし、再び
結露判定手段により判定することを繰り返す。In the bath apparatus with a water heater according to the first aspect of the present invention having the above structure, in the case of simultaneous combustion of the hot water supply burner and the bath burner, a common proportional valve is provided in accordance with the amount of fuel supplied to the hot water supply burner. Control the opening. If the opening degree is small, the amount of fuel to the bath burner also decreases accordingly, the temperature of the bath heat exchanger decreases, and water vapor in the combustion exhaust gas is easily condensed.
When the dew condensation determining means determines that there is a possibility of dew condensation in the bath, the bath on-off valve is closed once to stop the combustion of the bath burner, thereby preventing dew condensation. After a lapse of a predetermined time, almost no water vapor is present in the vicinity of the bath heat exchanger, so that the dew condensation hardly occurs. The determination by the condensation determining means is repeated again.
【０００９】また、上記構成を有する本発明の請求項２
記載の給湯器付風呂装置は、結露判定手段により風呂釜
に結露の可能性があることを判定した場合には、風呂バ
ーナの燃焼を停止して結露を防止するが、風呂バーナの
燃焼を停止させている所定時間中に給湯バーナへの燃料
量が所定値以上になると共通比例弁の開度が十分大きい
ことから、風呂バーナの燃焼を再開しても風呂バーナへ
の燃料量が増加するため、風呂釜で結露しにくくなる。
一方、風呂バーナの燃焼を停止させている所定時間中
に、給湯バーナの燃焼が停止すると、風呂バーナの燃焼
を再開しても、共通比例弁は風呂バーナへの燃料量に合
わせた開度が設定されるため、風呂バーナへの燃料量を
増加させることができ、風呂釜で結露しにくくなる。こ
のように、結露しにくい状態になれば、所定時間が経過
するのを待つ必要は無く、追焚運転をすぐに開始でき
る。Further, the present invention having the above-mentioned structure has a second aspect.
The described bath apparatus with a water heater, when it is determined by the condensation determining means that there is a possibility of condensation in the bath kettle, stops the combustion of the bath burner to prevent dew condensation, but stops the combustion of the bath burner. When the amount of fuel to the hot water supply burner exceeds a predetermined value during the predetermined time period, the opening of the common proportional valve is sufficiently large. Therefore, even if combustion of the bath burner is restarted, the amount of fuel to the bath burner increases. , Less condensation in the bath.
On the other hand, if the combustion of the hot water supply burner is stopped during the predetermined time during which the combustion of the bath burner is stopped, even if the combustion of the bath burner is restarted, the opening of the common proportional valve is adjusted to the amount of fuel to the bath burner. Since this is set, the amount of fuel to the bath burner can be increased, and dew condensation in the bath kettle becomes difficult. As described above, when the dew condensation is difficult, it is not necessary to wait for a predetermined time to elapse, and the reheating operation can be started immediately.
【００１０】また、上記構成を有する本発明の請求項３
記載の給湯器付風呂装置は、結露判定手段により風呂釜
で加熱された循環水の出湯温度から、風呂釜が結露し易
いような低温になっているかを判定する。[0010] Further, according to the present invention having the above structure,
The described bath apparatus with a water heater determines whether the temperature of the circulating water heated in the bath by the condensation determining means is low enough to cause condensation in the bath.
【００１１】また、上記構成を有する本発明の請求項４
記載の給湯器付風呂装置は、結露判定手段により風呂バ
ーナの燃焼量と浴槽からの湯温とから、風呂釜が結露し
易いような低温になっているかを判定する。[0011] Further, the present invention having the above-described structure has a fourth aspect.
The bath apparatus with a water heater described above determines whether the temperature of the bath is low enough to easily cause dew condensation on the basis of the amount of combustion of the bath burner and the temperature of hot water from the bathtub by the condensation determining means.
【００１２】[0012]
【発明の実施形態】以上説明した本発明の構成・作用を
一層明らかにするために、以下本発明の給湯器付風呂装
置の好適な実施形態について説明する。図１は、一実施
形態としての給湯器付風呂装置（以下、風呂装置と呼
ぶ）を表すもので、この風呂装置は、大別すると風呂回
路４０と給湯回路５０とから構成される。風呂回路４０
は、浴槽２０水を加熱する風呂熱交換器４２と、浴槽水
を風呂熱交換器４２へ送る戻し管４６と、風呂熱交換器
４２で加熱された浴槽水を浴槽２０へ送る往き管４７と
で循環加熱回路を形成すると共に、戻し管４６と往き管
４７とを繋ぎ風呂熱交換器４２を迂回するバイパス管３
４を備える。この戻し管４６には、上流側から順に、追
い焚き前の湯温を検知する風呂入水サーミスタ２４、浴
槽水を循環させる循環ポンプ２２、この循環水の流れを
確認する流水スイッチ２３が設けられる。一方、往き管
４７には、風呂熱交換器４２の近傍に追い焚き後の湯温
を検知する風呂出湯サーミスタ２５が設けられる。風呂
熱交換器４２は、燃焼室４９上部に設けられ、風呂バー
ナ４１により加熱される。DESCRIPTION OF THE PREFERRED EMBODIMENTS In order to further clarify the configuration and operation of the present invention described above, a preferred embodiment of a bath apparatus with a water heater of the present invention will be described below. FIG. 1 illustrates a bath apparatus with a water heater (hereinafter, referred to as a bath apparatus) according to one embodiment. The bath apparatus is roughly divided into a bath circuit 40 and a hot water supply circuit 50. Bath circuit 40
Includes a bath heat exchanger 42 for heating the bathtub 20 water, a return pipe 46 for sending the bathtub water to the bath heat exchanger 42, and an outgoing pipe 47 for sending the bathtub water heated by the bath heat exchanger 42 to the bathtub 20. To form a circulating heating circuit, and connect the return pipe 46 and the outgoing pipe 47 to bypass the bath heat exchanger 42.
4 is provided. The return pipe 46 is provided, in order from the upstream side, with a bath water thermistor 24 for detecting the temperature of hot water before reheating, a circulation pump 22 for circulating bath water, and a flowing water switch 23 for checking the flow of the circulating water. On the other hand, the outflow pipe 47 is provided with a bath tapping thermistor 25 near the bath heat exchanger 42 for detecting the temperature of hot water after reheating. The bath heat exchanger 42 is provided above the combustion chamber 49 and is heated by the bath burner 41.
【００１３】一方、給湯回路５０には、上流側から順
に、入水量を検知する流量センサ２６、入水温を検知す
る給湯入水サーミスタ２７、設定湯温が得られるように
通水量を調整する水量制御モータ２８、通水を加熱する
給湯熱交換器５２、熱交換後の湯温を検知する給湯熱交
換器出口サーミスタ１２が設けられる。給湯熱交換器５
２は、燃焼室５９上部に設けられ、給湯バーナ５１によ
り加熱される。給湯バーナ５１は、燃焼能力の異なる３
組のバーナからなり、燃焼量に応じて燃焼するバーナが
切り替えられる。On the other hand, in the hot water supply circuit 50, in order from the upstream side, a flow rate sensor 26 for detecting the amount of incoming water, a hot water supply thermistor 27 for detecting the incoming water temperature, and a water flow control for adjusting the amount of passing water so as to obtain the set hot water temperature. A motor 28, a hot water supply heat exchanger 52 for heating the water flow, and a hot water supply heat exchanger outlet thermistor 12 for detecting the temperature of the hot water after the heat exchange are provided. Hot water supply heat exchanger 5
2 is provided above the combustion chamber 59 and is heated by the hot water supply burner 51. The hot water supply burner 51 has three different combustion capacities.
Composed of a set of burners, the burners that burn according to the amount of combustion are switched.
【００１４】更に、給湯回路５０には、給湯熱交換器５
２の上流と下流とを繋ぐバイパス路３６が設けられ、そ
のバイパス路３６を開閉するバイパス弁１４が設けられ
る。このバイパス路３６の下流には、バイパス路３６を
通過する水と熱交換後の湯との混合湯の温度を検知する
給湯出湯サーミスタ１５が設けられる。この下流流路
は、台所の給湯カラン２１に連通する一般給湯管３７
と、浴槽２０へ給湯するための落とし込み管３０とに分
岐する。落とし込み管３０は、給湯回路５０と風呂回路
４０とを接続するもので、上流側から順に、落とし込み
管３０を開閉する落とし込み電磁弁３１、給湯回路５０
から風呂回路４０への流量を検知する落とし込み流量セ
ンサ３２、逆流を防止する２個の逆止弁３３が設けられ
る。The hot water supply circuit 50 further includes a hot water supply heat exchanger 5.
A bypass 36 connecting the upstream and downstream of the second 2 is provided, and a bypass valve 14 for opening and closing the bypass 36 is provided. Downstream of the bypass passage 36, a hot water supply and discharge thermistor 15 for detecting the temperature of the mixed hot water of the water passing through the bypass passage 36 and the hot water after the heat exchange is provided. This downstream flow path is provided with a general hot water supply pipe 37 communicating with the hot water supply curan 21 in the kitchen.
And a dropping pipe 30 for supplying hot water to the bathtub 20. The dropping pipe 30 connects the hot water supply circuit 50 and the bath circuit 40. The dropping solenoid valve 31 for opening and closing the dropping pipe 30 and the hot water supply circuit 50 are arranged in order from the upstream side.
There is provided a drop flow sensor 32 for detecting a flow rate from the to the bath circuit 40, and two check valves 33 for preventing backflow.
【００１５】給湯回路５０と風呂回路４０とには、それ
ぞれ燃焼用空気の供給路となる共通の給気ダクト３５が
設けられ、ファンモータ１９により駆動する１つのファ
ン１８により空気が風呂側の燃焼室４９と給湯側の燃焼
室５９に同時に供給される。また、ガス流路は、その上
流側から順に、ガス流路を開閉する元電磁弁１０、通電
量に応じたガス量を制御する比例弁１１が設けられ、そ
の下流側で給湯側ガス流路と風呂側ガス流路とに分岐す
る。給湯側には、３組のバーナへのガス流路を独立して
開閉する給湯電磁弁５５、５６、５７がそれぞれ設けら
れ、各々独立した燃焼制御が行われる。一方、風呂側に
は、風呂側ガス流路を開閉する風呂電磁弁４５が設けら
れる。風呂バーナ４１、給湯バーナ５１には、イグナイ
タ１３の動作によりガスへ着火する電極４３、５３、燃
焼炎を検知するフレームロッド４４、５４が設けられ、
前記のセンサ類・アクチュエータ類と共にコントローラ
９と電気的に接続され出湯・追い焚き・停止等所定の制
御が行われる。尚、このコントローラ９は、マイコンを
主要部として構成される。Each of the hot water supply circuit 50 and the bath circuit 40 is provided with a common air supply duct 35 serving as a supply path of combustion air, and air is supplied to the bath side by one fan 18 driven by a fan motor 19. The water is supplied to the chamber 49 and the combustion chamber 59 on the hot water supply side at the same time. The gas flow path is provided with a main solenoid valve 10 for opening and closing the gas flow path and a proportional valve 11 for controlling the amount of gas in accordance with the amount of electric current in order from the upstream side. And a bath-side gas flow path. On the hot water supply side, hot water supply solenoid valves 55, 56, 57 for independently opening and closing the gas flow paths to the three sets of burners are provided, and independent combustion control is performed. On the other hand, on the bath side, a bath solenoid valve 45 for opening and closing the bath-side gas flow path is provided. The bath burner 41 and the hot water supply burner 51 are provided with electrodes 43 and 53 for igniting gas by the operation of the igniter 13 and frame rods 44 and 54 for detecting combustion flame.
Along with the sensors and actuators, the controller 9 is electrically connected to the controller 9 to perform predetermined control such as tapping, reheating, and stopping. The controller 9 is configured with a microcomputer as a main part.
【００１６】風呂リモコン４８は、給湯を開始する給湯
スイッチ、目標湯温を増減する増減スイッチ、設定され
る湯温および設定時間・時刻等を表示する表示器、所定
量の湯張りを行って浴槽２０の湯温を一定に保つ風呂自
動スイッチ、設定温度よりも１から２℃高い温度になる
ように循環水を追い焚きするあつめスイッチ、設定温度
の湯を浴槽に２０リットル追加する足し湯スイッチ等の
操作ボタンが設けられ、浴室壁面に設置される。一方、
給湯リモコン５８にも風呂自動スイッチ等が設けられ、
台所壁面に設置される。The bath remote controller 48 includes a hot water supply switch for starting hot water supply, an increase / decrease switch for increasing / decreasing a target hot water temperature, an indicator for displaying a set hot water temperature and a set time / time, and a bathtub for filling a predetermined amount of hot water. Automatic bath switch that keeps the temperature of the hot water 20 constant, a switch that reheats the circulating water so that the temperature becomes 1 to 2 ° C higher than the set temperature, a hot water switch that adds 20 liters of hot water at the set temperature to the bathtub, etc. Operation buttons are provided and installed on the bathroom wall. on the other hand,
The bath water remote control 58 is also provided with a bath automatic switch, etc.
Installed on the kitchen wall.
【００１７】次に、一般給湯動作について説明する。給
湯カラン２１を開くと、水入口から流入した水は、給湯
熱交換器５２へ向かって流れる。流量センサ２６により
通水流量が所定量に達すると、ファン１８の回転により
プリパージし、その後、給湯バーナ５１に点火して比例
制御を開始する。各給湯電磁弁５５、５６、５７の開閉
および比例弁１１によって、ガス量を連続的に変化させ
て出湯温度を一定に保つ。また、水量制御モータ２８に
より適切な水量に調整を行うため、常に最大能力の出湯
量を確保する。給湯カラン２１を閉じると、流量センサ
２６により通水運転を検知しガス供給を停止して消火
し、ポストパージ動作後、ファン１８を停止させる。Next, the general hot water supply operation will be described. When the hot water supply curan 21 is opened, the water flowing from the water inlet flows toward the hot water supply heat exchanger 52. When the flow rate of the water reaches a predetermined amount by the flow rate sensor 26, pre-purge is performed by rotation of the fan 18, and then the hot water supply burner 51 is ignited to start proportional control. The opening and closing of each of the hot water supply electromagnetic valves 55, 56, 57 and the proportional valve 11 continuously change the gas amount to keep the tapping temperature constant. In addition, since the water amount is controlled by the water amount control motor 28 to an appropriate amount, the tap water amount of the maximum capacity is always secured. When the hot water supply curan 21 is closed, the water flow operation is detected by the flow rate sensor 26, the gas supply is stopped, and the fire is extinguished. After the post-purge operation, the fan 18 is stopped.
【００１８】次に、浴槽２０への自動給湯動作について
説明する。風呂リモコン４８または給湯リモコン５８の
風呂自動スイッチを押すと、落とし込み電磁弁３１がＯ
Ｎし、水流検知後、給湯バーナ５１が比例制御により給
湯燃焼動作をし、設定温度の湯は、落とし込み流量セン
サ３２、逆止弁３３を通って、浴槽２０に給湯される。
落とし込み流量センサ３２で検出した水量が設定水量に
なると、落とし込み電磁弁３１がＯＦＦし、給湯燃焼を
停止し、風呂回路４０の循環ポンプ２２を駆動して湯温
をチェックし、設定温度になるまで循環加熱し、図示し
ないお知らせブザーを鳴動して湯張りの完了を知らせ
る。Next, the operation of automatically supplying hot water to the bathtub 20 will be described. When the bath automatic switch of the bath remote control 48 or the hot water supply remote control 58 is pressed, the drop solenoid valve 31 is turned on.
After detecting the water flow, the hot water supply burner 51 performs a hot water supply combustion operation by proportional control, and the hot water at the set temperature is supplied to the bathtub 20 through the drop flow rate sensor 32 and the check valve 33.
When the amount of water detected by the dropping flow sensor 32 reaches the set water amount, the dropping solenoid valve 31 is turned off, the hot water combustion is stopped, the circulation pump 22 of the bath circuit 40 is driven to check the hot water temperature, and until the set temperature is reached. Circular heating is performed, and a notification buzzer (not shown) sounds to notify completion of filling.
【００１９】湯張り後、保温制御に移り、所定時間のイ
ンターバルで、循環ポンプ２２を作動して撹拌し、風呂
入水サーミスタ２４により浴槽水温をチェックして検出
温度が設定温度以下であればファン１８を回転させ、風
呂バーナ４１にガスを供給すると同時に、風呂バーナ４
１を点火し、風呂熱交換器４２を加熱して浴槽循環水の
加熱を開始する。風呂入水サーミスタ２４の検出温度が
設定温度に達したと判断すると、風呂バーナ４１を消火
し、循環ポンプ２２を停止する。After filling with hot water, the system shifts to heat retention control. At predetermined time intervals, the circulation pump 22 is operated to stir, and the bath water temperature is checked by the bath water thermistor 24. If the detected temperature is below the set temperature, the fan 18 To supply gas to the bath burner 41 and at the same time
1 is ignited and the bath heat exchanger 42 is heated to start heating the bathtub circulating water. When it is determined that the detected temperature of the bath water thermistor 24 has reached the set temperature, the bath burner 41 is extinguished and the circulation pump 22 is stopped.
【００２０】一方、低下していない場合には、循環ポン
プ２２の作動を停止させ、インターバル経過後に循環ポ
ンプ２２のみ作動させる。つまり、所定のインターバル
（例えば１０分おき）で浴槽水温をチェックし、湯温の
低下を検出した場合のみ追焚することで浴槽水温を設定
温度に維持するように制御する。風呂自動スイッチを押
すと、全ての作動が停止する。On the other hand, if not lowered, the operation of the circulation pump 22 is stopped, and only the circulation pump 22 is operated after the elapse of the interval. In other words, the bathtub water temperature is checked at predetermined intervals (for example, every 10 minutes), and only when a decrease in the hot water temperature is detected, the temperature of the bathtub is controlled so that the bathwater temperature is maintained at the set temperature. Pressing the bath automatic switch stops all operations.
【００２１】次に、給湯運転と追焚運転とが同時に行わ
れた場合のコントローラ９が実行する結露防止燃焼制御
ルーチンについて、図２に示すフローチャートを用いて
説明する。本ルーチンは、給湯運転と追焚運転とが同時
進行されると起動する。まず、結露判定手段により結露
する可能性があるか否かを判定する（Ｓ１）。具体的に
は、風呂出湯サーミスタ２５により風呂熱交換器４２で
加熱された循環水の出湯温度Ｔｏｕｔを検出し、出湯温
度Ｔｏｕｔが１５分間連続して４５℃以下であると結露
する可能性があると判定する。Next, a dew condensation prevention combustion control routine executed by the controller 9 when the hot water supply operation and the reheating operation are performed simultaneously will be described with reference to a flowchart shown in FIG. This routine starts when the hot water supply operation and the reheating operation are simultaneously performed. First, it is determined whether or not there is a possibility of dew condensation by the dew condensation determining means (S1). Specifically, the tapping water thermistor 25 detects the tapping temperature Tout of the circulating water heated by the bath heat exchanger 42, and if the tapping temperature Tout is continuously lower than 45 ° C. for 15 minutes, there is a possibility of dew condensation. Is determined.
【００２２】ステップ１において、結露する可能性があ
ると判定されるまで待機し、可能性があると判定される
と、風呂電磁弁４５を一旦閉じ風呂バーナ４１の燃焼を
停止して結露を防止する（Ｓ２）。次に風呂バーナ４１
を消火した後、所定時間（１５分）が経過したか否かを
判定する（Ｓ３）。In step 1, the process waits until it is determined that there is a possibility of dew condensation. If it is determined that there is a possibility of dew condensation, the bath solenoid valve 45 is temporarily closed to stop the combustion of the bath burner 41 to prevent dew condensation. (S2). Next, bath burner 41
After extinguishing, it is determined whether a predetermined time (15 minutes) has elapsed (S3).
【００２３】所定時間（１５分）が経過したと判定した
場合には、風呂バーナ４１を点火して追焚を開始し（Ｓ
５）、ステップ１へ戻る。つまり、この所定時間１５分
の間に、風呂熱交換器４２付近の燃焼排気がファン１８
により器体外に排出され、しかも風呂熱交換器４２の表
面が乾燥し、結露しにくい状態になるため、風呂バーナ
４１の燃焼を開始するのである。If it is determined that the predetermined time (15 minutes) has elapsed, the bath burner 41 is ignited to start additional heating (S
5) Return to step 1. That is, the combustion exhaust gas in the vicinity of the bath heat exchanger 42 is
As a result, the bath heat exchanger 42 is dried, and the surface of the bath heat exchanger 42 dries and the dew condensation hardly occurs. Thus, the combustion of the bath burner 41 is started.
【００２４】逆に、所定時間（１５分）が経過していな
いと判定した場合には、給湯バーナ５１へのガス量が風
呂バーナ４１へのガス量に換算して所定値９４ｋｃａｌ
／分以上に相当する比例弁の電流値であるか或いは０
（つまり給湯運転が停止）であるか否かを判定する（Ｓ
４）。ステップ４において、給湯バーナ５１へ所定値未
満のガスが供給され燃焼していると判定された場合に
は、まだ結露し易い状態であるため、ステップ３へ戻
る。一方、ステップ４において、給湯バーナ５１へのガ
ス量が所定値以上或いは０と判定された場合には、結露
しにくい状態になったと判断して１５分の経過を待つこ
となく、風呂バーナ４１の燃焼を再開し、風呂バーナ４
１のガス量を最大の１０７ｋｃａｌ／分にし追焚を開始
して（Ｓ５）、ステップ１へ戻る。つまり、風呂、給湯
ともにガス量が共通の比例弁１１で制御され、しかも給
湯温度制御を優先するため、風呂バーナ４１の燃焼量は
給湯バーナ５１の燃焼量に応じて変化することから、ス
テップ４で給湯バーナ５１のガス供給量に基づいて風呂
側が結露しにくい状態に戻ったか否かを判断するのであ
る。また、給湯器が運転停止した場合には、風呂バーナ
４１の燃焼を再開しても、比例弁１１は風呂バーナ４１
への燃料量に合わせた開度が設定されるため、風呂バー
ナ４１への燃料量を増加させることができ、風呂釜で結
露しにくくなり、所定時間（１５分）が経過するのを待
つ必要は無く、追焚運転をすぐに開始できる。Conversely, when it is determined that the predetermined time (15 minutes) has not elapsed, the gas amount to the hot water supply burner 51 is converted to the gas amount to the bath burner 41 and a predetermined value of 94 kcal is calculated.
Current value of the proportional valve equal to or more than / min or 0
(That is, stop the hot water supply operation) (S
4). If it is determined in step 4 that the gas having a value less than the predetermined value is supplied to the hot water supply burner 51 and the gas is burning, the process returns to step 3 because it is in a state where dew is easily formed. On the other hand, when it is determined in step 4 that the gas amount to the hot water supply burner 51 is equal to or larger than the predetermined value or is 0, it is determined that the dew condensation has hardly occurred, and the bath burner 41 does not need to wait for 15 minutes. Resume combustion, bath burner 4
The gas amount of No. 1 is set to the maximum of 107 kcal / min, and reheating is started (S5), and the process returns to step 1. That is, the gas amount is controlled by the common proportional valve 11 for both the bath and the hot water supply, and since the hot water supply temperature control is prioritized, the combustion amount of the bath burner 41 changes according to the combustion amount of the hot water supply burner 51. Then, based on the gas supply amount of the hot water supply burner 51, it is determined whether or not the bath side has returned to a state in which dew condensation hardly occurs. Further, when the operation of the water heater is stopped, even if the combustion of the bath burner 41 is restarted, the proportional valve 11 remains in the bath burner 41.
Since the opening degree is set in accordance with the amount of fuel to the bath, the amount of fuel to the bath burner 41 can be increased, and dew condensation hardly occurs in the bath kettle. No, reheating operation can be started immediately.
【００２５】以上、説明したように、本実施形態の給湯
器付風呂装置は、結露し易い状態になれば追焚運転を停
止し燃焼排気を発生させないようにして結露を防止で
き、一方、結露しにくい状態に戻れば、給湯運転が行わ
れていても追焚運転を開始するため、追焚運転の待機時
間が短縮され、浴槽２０内の湯があまり冷めないで済
み、追焚運転にかかる時間を短くすることができる。更
に、この給湯器付風呂装置は、風呂側の燃焼室４９と給
湯側の燃焼室５９とへ同時に燃焼用空気を送り込むファ
ン１８を備えているため、ステップ４で追焚運転を所定
時間（１５分）待機している間も、給湯運転用にファン
１８は作動していて、同時に風呂熱交換器４２へも空気
を送っている。この結果、風呂熱交換器４２の表面が乾
燥して結露しにくい状態になり、早い段階で風呂バーナ
４１の燃焼を再開することができる。また、結露判定
は、風呂熱交換器４２への循環水量および入水温度を測
定してを行うのではなく、風呂出湯サーミスタ２５によ
り行うため簡単でかつ正確である。As described above, the bath apparatus with a water heater according to the present embodiment can stop the reheating operation and prevent the generation of combustion exhaust when the dew condensation occurs easily, thereby preventing the dew condensation. If it returns to a state that is difficult to perform, the reheating operation is started even if the hot water supply operation is being performed, so the standby time of the reheating operation is reduced, the hot water in the bathtub 20 does not need to be cooled too much, and the reheating operation starts. Time can be shortened. Further, since the bath apparatus with the water heater is provided with the fan 18 for simultaneously feeding the combustion air into the combustion chamber 49 on the bath side and the combustion chamber 59 on the hot water side, the reheating operation is performed for a predetermined time (15 Minutes) During the standby, the fan 18 is operating for the hot water supply operation, and at the same time, sends air to the bath heat exchanger 42. As a result, the surface of the bath heat exchanger 42 is dried and hardly condenses, and combustion of the bath burner 41 can be restarted at an early stage. Further, the dew condensation determination is simple and accurate because it is performed not by measuring the circulating water amount and the incoming water temperature to the bath heat exchanger 42 but by the bath hot water thermistor 25.
【００２６】以上、本発明の実施形態について説明した
が、本発明はこうした実施形態に何等限定されるもので
はなく、本発明の趣旨を逸脱しない範囲において、種々
なる態様で実施し得ることは勿論である。例えば、別の
結露判定方法として、風呂入水サーミスタ２４により浴
槽２０から循環される戻り湯の温度Ｔｉｎを検出し、図
３に示すように、風呂バーナ４１へ供給されるガス量と
戻り湯温Ｔｉｎとが斜線部に示される結露発生領域内に
あると、出湯温度Ｔｏｕｔが４５℃未満相当となり、こ
の状態が所定時間（例えば１５分間）継続すると結露の
可能性があると判定してもよく、風呂出湯サーミスタ２
５を設けなくてもよくなる。或いは、単に風呂バーナ４
１へ供給されるガス量が９４ｋｃａｌ／分未満で戻り湯
温Ｔｉｎが２２℃未満となる状態が連続して所定時間
（例えば１５分間）続いた場合に、結露する可能性があ
ると判定してもよい。また、風呂側の燃焼室４９と給湯
側の燃焼室５９とへ燃焼用空気を送り込むファンを別々
に備えてもよいが、ステップ４で所定時間（１５分）待
機している間も風呂側のファンを作動させるようにすれ
ば、風呂熱交換器４２の表面が乾燥して結露しにくい状
態になり、早い段階で風呂バーナ４１の燃焼を再開する
ことができる。また、燃料は、ガスに限らず、灯油等の
液体でもよい。Although the embodiments of the present invention have been described above, the present invention is not limited to these embodiments at all, and it is needless to say that the present invention can be implemented in various modes without departing from the gist of the present invention. It is. For example, as another dew-condensation determination method, the temperature Tin of the return hot water circulated from the bathtub 20 is detected by the bath water thermistor 24, and the amount of gas supplied to the bath burner 41 and the return hot water temperature Tin as shown in FIG. Is within the dew condensation region indicated by the hatched portion, the tapping temperature Tout is less than 45 ° C., and if this state continues for a predetermined time (for example, 15 minutes), it may be determined that there is a possibility of dew condensation. Bath bath thermistor 2
5 need not be provided. Or just bath burner 4
If the amount of gas supplied to 1 is less than 94 kcal / min and the return water temperature Tin is less than 22 ° C. for a predetermined time (for example, 15 minutes), it is determined that there is a possibility of dew condensation. Is also good. Further, a separate fan may be provided to feed combustion air into the combustion chamber 49 on the bath side and the combustion chamber 59 on the hot water supply side. By operating the fan, the surface of the bath heat exchanger 42 becomes dry and hardly condenses, and the combustion of the bath burner 41 can be restarted at an early stage. The fuel is not limited to gas, but may be liquid such as kerosene.
【００２７】[0027]
【発明の効果】以上詳述したように、本発明の請求項１
記載の給湯器付風呂装置によれば、結露判定手段の判定
に基づいて風呂バーナの燃焼を停止し、給湯運転が行わ
れていても、所定時間経過後、追焚運転を再開するた
め、追焚運転の待機時間が短縮され、それに伴って追焚
運転にかかる時間も短縮され、快適な入浴ができると共
に、風呂釜での結露を防止して風呂釜の耐久性を向上す
ることができる。As described in detail above, claim 1 of the present invention
According to the described bath apparatus with a water heater, the combustion of the bath burner is stopped based on the determination by the condensation determining means, and even if the hot water supply operation is being performed, the reheating operation is restarted after a predetermined time has elapsed. The standby time of the heating operation is shortened, and accordingly, the time required for the additional heating operation is also shortened, so that comfortable bathing can be performed, and dew condensation in the bath can be prevented, thereby improving the durability of the bath.
【００２８】また、請求項２記載の給湯器付風呂装置に
よれば、風呂釜で結露しにくい状態になれば、所定時間
が経過するのを待つことなく、追焚運転をすぐ開始して
快適な入浴ができる。According to the bath apparatus with the water heater according to the second aspect, if dew condensation is difficult in the bath kettle, the reheating operation can be started immediately without waiting for a predetermined time to elapse, and comfortable. You can take a bath.
【００２９】また、請求項３記載の給湯器付風呂装置に
よれば、風呂釜で加熱された湯温に基づいて結露の判定
をするため、簡単でかつ正確である。この結果、風呂釜
での結露を確実に防止して風呂釜の耐久性を一層向上す
ることができる。According to the third aspect of the present invention, the dew condensation is determined on the basis of the temperature of the hot water heated in the bath, so that it is simple and accurate. As a result, dew condensation in the bath can be reliably prevented, and the durability of the bath can be further improved.
【００３０】また、請求項４記載の給湯器付風呂装置に
よれば、浴槽湯温を検出する温度センサを結露判定手段
として兼用でき、風呂バーナの燃焼量と浴槽からの湯温
とに基づいて結露の判定をするため、新たに結露判定用
の温度検出手段を設ける必要が無くコストアップに繋が
らない。また、風呂釜での結露を確実に防止して風呂釜
の耐久性を一層向上することができる。According to the fourth aspect of the present invention, a temperature sensor for detecting the temperature of the bath water can also be used as the dew-condensation judging means, based on the combustion amount of the bath burner and the temperature of the hot water from the bath. In order to determine the dew condensation, it is not necessary to newly provide a temperature detecting means for determining the dew condensation, which does not lead to an increase in cost. In addition, dew condensation in the bath can be reliably prevented, and the durability of the bath can be further improved.
【図１】本実施形態の給湯器付風呂装置の概略構成図で
ある。FIG. 1 is a schematic configuration diagram of a bath apparatus with a water heater of the present embodiment.
【図２】本実施形態の結露防止燃焼制御ルーチンを表す
フローチャートである。FIG. 2 is a flowchart illustrating a dew condensation prevention combustion control routine according to the embodiment.
【図３】結露発生領域を示す図である。FIG. 3 is a diagram illustrating a condensation occurrence region.
【図４】従来例の結露防止燃焼制御ルーチンを表すフロ
ーチャートである。FIG. 4 is a flowchart showing a conventional dew condensation prevention combustion control routine.
９…コントローラ、 １１…比例弁、 ２０…浴槽、
２２…循環ポンプ、２５…風呂出湯サーミスタ、 ３０
…落とし込み管、 ４０…風呂回路、４２…風呂熱交換
器、 ５０…給湯回路。9: controller, 11: proportional valve, 20: bathtub,
22: circulation pump, 25: bath hot water thermistor, 30
... dropping pipe, 40 ... bath circuit, 42 ... bath heat exchanger, 50 ... hot water supply circuit.
───────────────────────────────────────────────────── フロントページの続き Ｆターム(参考） 3L024 CC01 CC11 CC25 DD06 DD14 DD17 DD22 DD27 GG06 GG32 GG41 GG50 HH55 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3L024 CC01 CC11 CC25 DD06 DD14 DD17 DD22 DD27 GG06 GG32 GG41 GG50 HH55
Claims (4)
度になるよう加熱制御して出湯する給湯器と、 風呂バーナの燃焼熱により浴槽水を循環加熱する風呂釜
と、 上記給湯バーナへの燃料供給路を開閉する給湯開閉弁
と、 上記風呂バーナへの燃料供給路を開閉する風呂開閉弁
と、 通電量に応じて上記各バーナへの燃料量を調整する共通
の比例弁とを備え、 上記各バーナを同時に燃焼する場合には上記給湯器の加
熱制御を優先して上記比例弁により燃料量を調整する給
湯器付風呂装置において、 上記各バーナを同時に燃焼する時に上記風呂釜に結露の
可能性があるか否かを判定する結露判定手段を設け、 上記結露判定手段により上記風呂釜に結露の可能性があ
ることを判定した場合には、上記風呂バーナの燃焼を一
旦停止し、所定時間後に該風呂バーナの燃焼を再開し
て、再び該結露判定手段により判定することを特徴とす
る給湯器付風呂装置。1. A water heater for heating and controlling the flow of water to a target temperature by the heat of combustion of a hot water supply burner to output hot water, a bath kettle for circulating and heating bath water by the heat of combustion of a bath burner, A hot water supply opening / closing valve for opening / closing a fuel supply path, a bath opening / closing valve for opening / closing a fuel supply path to the bath burner, and a common proportional valve for adjusting the amount of fuel to each of the burners according to the amount of electricity supplied, In the case of simultaneously burning the burners, in a bath apparatus with a water heater that prioritizes the heating control of the water heater and adjusts the fuel amount by the proportional valve, when the burners are simultaneously burned, dew condensation occurs on the bath kettle. Dew condensation determining means for determining whether or not there is a possibility is provided, and when the dew condensation determining means determines that there is a possibility of dew condensation in the bath kettle, the combustion of the bath burner is temporarily stopped, and After hours Resume combustion bath burner, water heater with a bath and wherein the determining by again said condensation determining means.
上記所定時間内に、給湯バーナへの燃料量が所定値以上
もしくは該給湯バーナの燃焼が停止した場合には、該所
定時間の経過を待たずに上記風呂バーナの燃焼を再開す
ることを特徴とする請求項１記載の給湯器付風呂装置。2. If the fuel amount to the hot water supply burner is equal to or more than a predetermined value or the combustion of the hot water supply burner is stopped within the predetermined time during which the combustion of the bath burner is stopped, the elapse of the predetermined time is considered. The bath apparatus with a water heater according to claim 1, wherein combustion of the bath burner is restarted without waiting.
された湯温に基づいて判定することを特徴とする請求項
１または２記載の給湯器付風呂装置。3. The bath apparatus with a water heater according to claim 1, wherein said dew-condensation judging means judges based on the temperature of hot water heated by said bath kettle.
燃焼量と上記浴槽からの湯温とに基づいて判定すること
を特徴とする請求項１または２記載の給湯器付風呂装
置。4. The bath apparatus with a water heater according to claim 1, wherein said dew-condensation determining means makes a determination based on a combustion amount of said bath burner and a temperature of hot water from said bathtub.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20314799A JP4002371B2 (en) | 1999-07-16 | 1999-07-16 | Bath device with water heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20314799A JP4002371B2 (en) | 1999-07-16 | 1999-07-16 | Bath device with water heater |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2001033099A true JP2001033099A (en) | 2001-02-09 |
| JP4002371B2 JP4002371B2 (en) | 2007-10-31 |
Family
ID=16469211
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20314799A Expired - Fee Related JP4002371B2 (en) | 1999-07-16 | 1999-07-16 | Bath device with water heater |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4002371B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007271249A (en) * | 2006-03-10 | 2007-10-18 | Gastar Corp | Hot water supply device for bath |
| JP2017122533A (en) * | 2016-01-06 | 2017-07-13 | 株式会社ガスター | Bath water heater |
| JP2017122534A (en) * | 2016-01-06 | 2017-07-13 | 株式会社ガスター | Bath water heater |
| JP2017122535A (en) * | 2016-01-06 | 2017-07-13 | 株式会社ガスター | Bath water heater |
-
1999
- 1999-07-16 JP JP20314799A patent/JP4002371B2/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007271249A (en) * | 2006-03-10 | 2007-10-18 | Gastar Corp | Hot water supply device for bath |
| JP2017122533A (en) * | 2016-01-06 | 2017-07-13 | 株式会社ガスター | Bath water heater |
| JP2017122534A (en) * | 2016-01-06 | 2017-07-13 | 株式会社ガスター | Bath water heater |
| JP2017122535A (en) * | 2016-01-06 | 2017-07-13 | 株式会社ガスター | Bath water heater |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4002371B2 (en) | 2007-10-31 |
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