JPH0623871Y2 - Water heater with hot water filling circuit - Google Patents
Water heater with hot water filling circuitInfo
- Publication number
- JPH0623871Y2 JPH0623871Y2 JP1987008061U JP806187U JPH0623871Y2 JP H0623871 Y2 JPH0623871 Y2 JP H0623871Y2 JP 1987008061 U JP1987008061 U JP 1987008061U JP 806187 U JP806187 U JP 806187U JP H0623871 Y2 JPH0623871 Y2 JP H0623871Y2
- Authority
- JP
- Japan
- Prior art keywords
- flow rate
- hot water
- rate limiting
- temperature
- limiting means
- 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 - Lifetime
Links
Landscapes
- Control For Baths (AREA)
Description
【考案の詳細な説明】 ［利用分野］ 本考案は、浴槽に直接給湯する、所謂、湯張り回路を具
備させた給湯器に関するものであり、出湯温度固定式の
給湯器を用いて湯張りする場合の湯張り時間の短縮を企
画するものである。[Field of Use] [Field of the Invention] The present invention relates to a water heater having a so-called water filling circuit for directly supplying hot water to a bathtub, which is filled with a hot water heater with a fixed outlet temperature. In this case, we plan to shorten the filling time.
［従来技術及びその問題点］ 給湯器、特に、瞬間湯沸器では、最近、比例制御方式が
普及し、この型式の給湯器では、出湯量の如何にかかわ
らず、出湯温度が設定温度に維持できる。[Prior art and its problems] In hot water heaters, especially instantaneous water heaters, a proportional control system has recently become widespread, and in this type of water heater, the hot water temperature is maintained at a set temperature regardless of the amount of hot water discharged. it can.
この方式の瞬間湯沸器では、設定温度を、例えば、冬期
60℃，夏期75℃に固定した場合には、給湯能力の範囲内
ならば、出湯量の多少にかかわらず、給湯管からは、前
記温度の湯が取り出せることとなる。従って、混合水栓
を組み合わせて使用すると、この混合水栓の水回路側の
開度調節によって出湯温度と出湯量の組み合わせが種々
に変えられる。又、第４図の如く、湯張り回路(11)を付
加して、設定温度の湯を直接浴槽(1)に給湯できるよう
にし、水位検知手段(12)と湯張り弁(13)とを組み合わせ
れば、湯張り完了時点で給湯が停止できる。ところが、
この場合には、湯張り時間が必要以上に長くなるという
問題がある。With this type of instant water heater, the set temperature is
When the temperature is fixed at 60 ° C and 75 ° C in summer, the hot water having the above temperature can be taken out from the hot water supply pipe regardless of the amount of hot water discharged within the range of the hot water supply capacity. Therefore, when a mixed faucet is used in combination, the combination of the hot water discharge temperature and the hot water discharge amount can be variously changed by adjusting the opening degree of the mixed water tap on the water circuit side. Further, as shown in FIG. 4, a water filling circuit (11) is added so that hot water having a set temperature can be directly supplied to the bathtub (1), and the water level detecting means (12) and the water filling valve (13) are connected. If combined, hot water supply can be stopped when the filling of water is completed. However,
In this case, there is a problem that the filling time becomes longer than necessary.
上記型式のものでは、給湯回路(14)側の蛇口(15)を全開
した条件下でもバーナ(2)の燃焼能力に応じた最高出湯
温度を維持できるようにするため、熱交換器(10)への最
大供給水量を絞り弁(16)またはオリフィスによって予め
一定に制限してあることから、湯張り時においても、こ
の最大給水量以上の出湯量を増やすことができないから
である。In the above type, in order to maintain the maximum hot water temperature according to the combustion capacity of the burner (2) even under the condition that the faucet (15) on the hot water supply circuit (14) side is fully opened, the heat exchanger (10) This is because the maximum amount of water supplied to the pump is limited to a constant value in advance by the throttle valve (16) or the orifice, so that the amount of hot water discharged cannot exceed the maximum amount of water supplied even when the water is filled.
［技術的課題］ 本考案は、『浴槽(1)に直接給湯する湯張り回路(11)
と、給湯時には熱交換器(10)の出口側温度を第１設定温
度に維持し且湯張り時には熱交換器(10)の出口側温度を
入浴に適する湯張り温度に維持する比例弁(20)と、蛇口
(15)を全開したときの給湯温度を前記第１設定温度に維
持するために熱交換器(10)の上流側に設けた第１流量制
限手段とを具備する給湯器』において、湯張り時間を短
縮できるようにするため、湯張り温度ではバーナ(2)の
最大燃焼量に応じて十分な湯量が確保できるようにする
ことを課題とする。[Technical problem] The present invention relates to "a water filling circuit (11) for directly supplying hot water to a bathtub (1).
And a proportional valve (20) for maintaining the outlet side temperature of the heat exchanger (10) at the first set temperature during hot water supply and for maintaining the outlet side temperature of the heat exchanger (10) at the filling temperature suitable for bathing during hot water filling. ) And the faucet
In the water heater provided with the first flow rate limiting means provided on the upstream side of the heat exchanger (10) in order to maintain the hot water supply temperature when the (15) is fully opened at the first set temperature, In order to reduce the amount of hot water, it is an object to ensure a sufficient amount of hot water according to the maximum combustion amount of the burner (2) at the filling temperature.
［手段］ 上記課題を解決するために講じた本考案の技術的手段
は、『第１流量制限手段を具備する給水回路(17)に第２
流量制限手段を設け、この第２流量制限手段によって制
限されたときの給水回路(17)の最大流量を給湯器の最大
燃焼時に湯張り温度を維持し得る最大流量となるように
設定し、前記二つの流量制限手段のいずれか一方を作用
状態にするための切替手段を設け、給湯時にはこの切替
え手段によって第１流量制限手段のみが作用し、湯張り
時にはこの切替え手段によって第２流量制限手段のみが
作用するようにした』ことである。なお、第１実施例に
おいては、絞り弁(16)が第１流量制限手段として機能
し、この絞り弁(16)とバイパス回路(3)に挿入したオリ
フィス(32)との組み合わせが第２流量制限手段として機
能する。また、第２実施例では、弁体(36)に設けた小孔
(37)が第１流量制限手段として機能し、オリフィス(38)
が第２流量制限手段として機能する。さらに、いずれの
実施例においても、開閉弁(31)が切替手段として機能す
る。[Means] The technical means of the present invention taken to solve the above-mentioned problem is "the second in the water supply circuit (17) including the first flow rate limiting means".
Flow rate limiting means is provided, and the maximum flow rate of the water supply circuit (17) when limited by the second flow rate limiting means is set so as to be the maximum flow rate capable of maintaining the filling temperature at the maximum combustion of the water heater. A switching means is provided for putting either one of the two flow rate limiting means into an operating state, and when hot water is supplied, only the first flow rate limiting means acts, and when hot water is filled, only the second flow rate limiting means is operated by this switching means. Was made to work. ” In the first embodiment, the throttle valve (16) functions as the first flow rate limiting means, and the combination of the throttle valve (16) and the orifice (32) inserted in the bypass circuit (3) is the second flow rate. It functions as a limiting means. Further, in the second embodiment, the small hole provided in the valve body (36)
The orifice (38) functions as the first flow rate limiting means (37).
Functions as the second flow rate limiting means. Further, in any of the embodiments, the on-off valve (31) functions as a switching means.
［作用］ 上記技術的手段は次のように作用する。[Operation] The above technical means operates as follows.
給湯時には、切替え手段によって第１流量制限手段が作
用すると共に比例弁(20)によって出湯温度が第１設定温
度に設定された状態にあるから、熱交換器(10)へは第１
流量制限手段によって制限された量の水が給水される。
このときの水量は、バーナ(2)の燃焼量に見合った値に
設定されるから、熱交換器(10)の出口側の温度は給湯蛇
口が全開になっても、出湯温度は第１設定温度に維持さ
れる。また、給湯回路の湯量が絞られても、比例弁(20)
の作用により第１設定温度に維持される。At the time of hot water supply, the switching means operates the first flow rate limiting means and the proportional valve (20) sets the hot water outlet temperature to the first set temperature, so that the heat exchanger (10) is connected to the first
A limited amount of water is supplied by the flow rate limiting means.
Since the amount of water at this time is set to a value commensurate with the combustion amount of the burner (2), the outlet temperature of the heat exchanger (10) is set to the first setting when the hot water supply faucet is fully opened. Maintained at temperature. Even if the amount of hot water in the hot water supply circuit is reduced, the proportional valve (20)
Is maintained at the first set temperature.
次いで、湯張り状態になると、比例弁(20)の作用により
熱交換器(10)の出口側の温度は湯張り温度に維持される
こととなるが、この時は、湯張り時の所定の信号によっ
て、切替手段が作動し、第２流量制限手段のみが作用す
ると共に出湯温度が湯張り温度に設定された状態とな
り、熱交換器(10)を介する流量が前記湯張り温度を維持
し得る最大流量に増量せしめられる。つまり、湯張り時
には、入浴に適する湯張り温度に維持されて最大流量状
態で浴槽に湯張りされる。Next, when the water is filled, the temperature on the outlet side of the heat exchanger (10) is maintained at the water filling temperature by the action of the proportional valve (20). By the signal, the switching means is operated, only the second flow rate limiting means is operated, and the hot water outlet temperature is set to the hot water filling temperature, and the flow rate through the heat exchanger (10) can maintain the hot water filling temperature. The maximum flow rate can be increased. That is, at the time of filling with water, the filling temperature is maintained at a temperature suitable for bathing and the bath is filled with the maximum flow rate.
その後、湯張りが完了すると、切替手段が作動して、各
部が上記した給湯状態に復帰する。After that, when the filling of the hot water is completed, the switching means is actuated, and each part returns to the hot water supply state.
［効果］ 本考案は、上記構成であるから、次の特有の効果を有す
る。[Effects] Since the present invention has the above-mentioned configuration, it has the following unique effects.
湯張り状態では、出湯温度が自動的に湯張り温度に設定
されると共に熱交換器(10)への供給水量が給湯状態にお
けるよりも増量せしめられるから湯張りに要する時間が
短縮できる。In the water filling state, the hot water discharge temperature is automatically set to the water filling temperature and the amount of water supplied to the heat exchanger (10) is increased more than in the hot water supply state, so that the time required for the water filling can be shortened.
第１・第２流量制限手段は熱交換器の上流側にあるか
ら、比例弁の湯温検知手段となるサーミスタへの前記流
量制限手段の保有熱量による影響はなく、しかも、熱交
換器の出口側に配設される湯張り弁との関係がない。従
って、前記サーミスタの検知精度が良好なものとなると
共に、熱交換器の出口側の構成が簡素化できる。Since the first and second flow rate limiting means are on the upstream side of the heat exchanger, there is no effect of the amount of heat possessed by the flow rate limiting means on the thermistor serving as the hot water temperature detecting means of the proportional valve, and the outlet of the heat exchanger. There is no relationship with the water filling valve installed on the side. Therefore, the detection accuracy of the thermistor becomes good, and the structure on the outlet side of the heat exchanger can be simplified.
［実施例］ 第１図，第２図に示す第１実施例は、第１流量制限手段
として、絞り弁(16)を採用し、これを迂回するバイパス
回路(3)に開閉弁(31)とオリフィス(32)を直列に挿入し
たもので、他の構成は、既述の第４図のものと同様に構
成されている。ここで、開閉弁(31)が開弁状態にあると
きの給水回路(17)から熱交換器(10)への流量は、上記絞
り弁(16)及びオリフィス(32)の両方の開度によって設定
される流量である。この流量は、予め所定に設定されて
おり、湯張り状態における熱交換器(10)の出口側の温度
を入浴に適する湯張り温度（例えば43℃）に維持しうる
最大流量に一致させてある。[Embodiment] In the first embodiment shown in FIGS. 1 and 2, a throttle valve (16) is adopted as the first flow rate limiting means, and an opening / closing valve (31) is provided in a bypass circuit (3) that bypasses this. And the orifice (32) are inserted in series, and the other structure is the same as that shown in FIG. Here, the flow rate from the water supply circuit (17) to the heat exchanger (10) when the on-off valve (31) is in the open state depends on the opening of both the throttle valve (16) and the orifice (32). This is the set flow rate. This flow rate is set in advance and is set to match the maximum flow rate at which the temperature on the outlet side of the heat exchanger (10) in the water filling state can be maintained at the water filling temperature suitable for bathing (for example, 43 ° C). .
次に、この実施例の電気回路について詳述する。Next, the electric circuit of this embodiment will be described in detail.
比例弁(20)の駆動回路は、演算増幅回路(21)と、積分回
路(22)との組み合わせとし、この積分回路(22)からの出
力信号によって比例弁(20)に接続したトランジスタ(23)
が作動するようになっている。演算増幅回路(21)の入力
側には、熱交換器(10)の出口側の温度を検知するセンサ
ーとしてのサーミスタ(S)の負極側の電圧と、温度設定
回路(4)側の電圧とが入力されるようになっており、こ
れら二つの入力値の比較出力が増幅されて積分回路(22)
に入力される。The drive circuit of the proportional valve (20) is a combination of an operational amplifier circuit (21) and an integrating circuit (22), and a transistor (23) connected to the proportional valve (20) by an output signal from this integrating circuit (22). )
Is working. On the input side of the operational amplifier circuit (21), the voltage on the negative side of the thermistor (S) as a sensor that detects the temperature on the outlet side of the heat exchanger (10) and the voltage on the temperature setting circuit (4) side Is input, and the comparison output of these two input values is amplified and the integration circuit (22)
Entered in.
前記温度設定回路(4)は、能力切替スイッチ(40)を介し
て接続される夏期における第１設定温度を設定するため
の第１抵抗(41)及び冬期における第１設定温を設定する
ための第２抵抗(42)と、湯張り時の給湯温度（湯張り温
度）設定用の第３抵抗(43)とからなり、リレー(30)の常
閉の第１出力接点(33)が能力切替スイッチ(40)への回路
に、常開の第２出力接点(34)が第３抵抗(43)への回路に
それぞれ挿入されている。尚、ここで、夏期における第
１設定温度は、例えば75℃に、冬期における第１設定温
度は例えば60℃に設定され能力切替スイッチ(40)によっ
て第１設定温度が切替られることとなる。The temperature setting circuit (4) is for connecting the first resistance (41) for setting the first set temperature in summer and the first set temperature in winter, which are connected via the capacity changeover switch (40). It consists of a second resistor (42) and a third resistor (43) for setting the hot water supply temperature (filling temperature) at the time of filling, and the normally closed first output contact (33) of the relay (30) switches the capacity. A normally open second output contact (34) is inserted in the circuit to the switch (40) in the circuit to the third resistor (43). Here, the first set temperature in summer is set to, for example, 75 ° C., the first set temperature in winter is set to, for example, 60 ° C., and the first set temperature is switched by the capacity changeover switch (40).
リレー(30)への回路には、湯張り用の操作スイッチ(35)
と、水位検知手段としての水位検知手段(12)が直列に挿
入されており、これらの直列回路と並列にリレー(30)の
自己保持回路が形成されている。また、バイパス回路
(3)に挿入される開閉弁(31)と湯張り弁(13)とは、前記
リレー(30)と並列に接続されており、操作スイッチ(35)
を押すと開閉弁(31)，湯張り弁(13)は共に導通状態に置
かれ、浴槽(1)内が所定の水位に達すると非導通状態と
なる。In the circuit to the relay (30), the operation switch (35) for filling water
And a water level detecting means (12) as a water level detecting means are inserted in series, and a self-holding circuit of the relay (30) is formed in parallel with these series circuits. Also a bypass circuit
The on-off valve (31) and the water filling valve (13) inserted in (3) are connected in parallel with the relay (30), and the operation switch (35)
When is pressed, both the on-off valve (31) and the water filling valve (13) are placed in a conductive state, and when the water level in the bathtub (1) reaches a predetermined water level, they are turned off.
以上詳記したように、この実施例では、熱交換器(10)の
出口側の出湯温度は、通常の給湯状態では、演算増幅回
路(21)，積分回路(22)の作用により第１抵抗(41)又は第
２抵抗(42)によって設定される第１設定温度に維持さ
れ、操作スイッチ(35)が閉成されて湯張り状態になる
と、前記温度は第３抵抗(43)によって設定される湯張り
温度に維持されることとなる。また、この後者の場合に
は、開閉弁(31)が開弁して熱交換器(10)への供給水量
が、前者の場合に比べて増量される。As described in detail above, in this embodiment, the outlet hot water temperature on the outlet side of the heat exchanger (10) is the first resistance due to the operation of the operational amplifier circuit (21) and the integrating circuit (22) in the normal hot water supply state. When the first set temperature set by (41) or the second resistance (42) is maintained and the operation switch (35) is closed to fill the water, the temperature is set by the third resistance (43). It will be maintained at the hot water filling temperature. Further, in the latter case, the on-off valve (31) is opened and the amount of water supplied to the heat exchanger (10) is increased as compared with the former case.
尚、この実施例では、バイパス回路(3)内に挿入する開
閉弁(31)とオリフィス(32)とを別個に構成したが、第３
図に示すように、開閉弁(31)の弁体(36)に絞り弁(16)と
同じ流量制限機能を有する小孔(37)を設け、さらに、こ
の弁体(36)の上流側にオリフィス(38)を挿入するように
してもよい。この第２実施例の場合には、開閉弁(31)が
開弁したときには、熱交換器(10)への供給水量は、オリ
フィス(38)によって制限された値となるが、この値を上
記第１実施例の開閉弁(31)が開弁したときの熱交換器(1
0)への供給水量に一致させておく。これにより、第１実
施例と同様に機能することとなる。この実施例の場合、
小孔(37)が第１流量制限手段として機能し、オリフィス
(38)が第２流量制限手段として機能する。In this embodiment, the on-off valve (31) to be inserted into the bypass circuit (3) and the orifice (32) are separately constructed.
As shown in the figure, the valve body (36) of the on-off valve (31) is provided with a small hole (37) having the same flow restriction function as the throttle valve (16), and further on the upstream side of this valve body (36). The orifice (38) may be inserted. In the case of the second embodiment, when the opening / closing valve (31) is opened, the amount of water supplied to the heat exchanger (10) becomes a value limited by the orifice (38). When the on-off valve (31) of the first embodiment is opened, the heat exchanger (1
Match the amount of water supplied to 0). As a result, the same function as in the first embodiment is achieved. In this example,
The small hole (37) functions as the first flow rate limiting means, and the orifice
(38) functions as a second flow rate limiting means.
第１図は本考案第１実施例の説明図，第２図はその電気
回路図，第３図は第２実施例の要部の説明図，第４図は
従来の給湯器に従来の湯張り装置をそのまま付加した場
合の説明図であり、図中 (1)……浴槽 (10)……熱交換器 (11)……湯張り回路 (15)……蛇口 (17)……給水回路 (20)……比例弁 (3)……バイパス回路 (31)……開閉弁FIG. 1 is an explanatory view of a first embodiment of the present invention, FIG. 2 is an electric circuit diagram thereof, FIG. 3 is an explanatory view of essential parts of a second embodiment, and FIG. 4 is a conventional water heater for a conventional hot water. It is an explanatory view when a tensioning device is added as it is, in the figure (1) ...... bathtub (10) ...... heat exchanger (11) ...... hot water filling circuit (15) …… faucet (17) …… water supply circuit (20) …… Proportional valve (3) …… Bypass circuit (31) …… Open / close valve
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭55−97564（ＪＰ，Ａ) 特開 昭56−147968（ＪＰ，Ａ) 実開 昭62−189554（ＪＰ，Ｕ) 実開 昭59−133941（ＪＰ，Ｕ) 実開 昭59−21440（ＪＰ，Ｕ) ─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP-A-55-97564 (JP, A) JP-A-56-147968 (JP, A) Actually opened 62-189554 (JP, U) Actually opened 59- 133941 (JP, U) Actually opened Sho 59-21440 (JP, U)
Claims (3)
と、給湯時には熱交換器(10)の出口側温度を第１設定温
度に維持し且湯張り時には熱交換器(10)の出口側温度を
入浴に適する湯張り温度に維持する比例弁(20)と、蛇口
(15)を全開したときの給湯温度を前記第１設定温度に維
持するために熱交換器(10)の上流側に設けた第１流量制
限手段とを具備する給湯器において、第１流量制限手段
を具備する給水回路(17)に第２流量制限手段を設け、こ
の第２流量制限手段によって制限されたときの給水回路
(17)の最大流量を給湯器の最大燃焼時に湯張り温度を維
持し得る最大流量となるように設定し、前記二つの流量
制限手段のいずれか一方を作用状態にするための切替手
段を設け、給湯時にはこの切替え手段によって第１流量
制限手段のみが作用し、湯張り時にはこの切替え手段に
よって第２流量制限手段のみが作用するようにした湯張
り回路を具備する給湯器。1. A water filling circuit (11) for supplying hot water directly to a bathtub (1).
And a proportional valve (20) for maintaining the outlet side temperature of the heat exchanger (10) at the first set temperature during hot water supply and for maintaining the outlet side temperature of the heat exchanger (10) at the filling temperature suitable for bathing during hot water filling. ) And the faucet
A water heater comprising: a first flow rate limiting means provided upstream of the heat exchanger (10) for maintaining the hot water temperature when the (15) is fully opened at the first set temperature. A water supply circuit (17) provided with means is provided with a second flow rate limiting means, and the water supply circuit is limited by the second flow rate limiting means.
The maximum flow rate of (17) is set to be the maximum flow rate that can maintain the filling temperature at the time of maximum combustion of the water heater, and a switching means is provided for putting one of the two flow rate limiting means into an operating state. A water heater provided with a water filling circuit in which only the first flow rate restricting means is operated by the switching means when hot water is supplied and only the second flow rate restricting means is operated by the switching means when the hot water is filled.
ィスとし、第２流量制限手段を前記第１流量制限手段を
迂回するバイパス回路(3)に挿入したオリフィス(32)と
前記絞り弁(16)又はオリフィスとの組み合わせとし、切
替手段をバイパス回路(3)に挿入した開閉弁(31)とした
実用新案登録請求の範囲第１項記載の湯張り回路を具備
する給湯器。2. An orifice (32) in which the first flow rate limiting means is a throttle valve (16) or an orifice, and the second flow rate limiting means is inserted in a bypass circuit (3) bypassing the first flow rate limiting means and the throttle. A water heater provided with a water filling circuit according to claim 1, which is a combination of a valve (16) or an orifice and an opening / closing valve (31) in which a switching means is inserted in a bypass circuit (3).
直列に配列し、切替手段を開閉弁(31)とするとともにこ
の開閉弁の弁体(36)に第１流量制限手段としての小孔(3
7)を貫通させた、実用新案登録請求の範囲第１項記載の
湯張り回路を具備する給湯器。3. A first flow rate limiting means and a second flow rate limiting means are arranged in series, the switching means is an on-off valve (31), and the valve body (36) of this on-off valve serves as the first flow rate limiting means. Small hole (3
A water heater having the hot water filling circuit according to claim 1 which penetrates 7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987008061U JPH0623871Y2 (en) | 1987-01-22 | 1987-01-22 | Water heater with hot water filling circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987008061U JPH0623871Y2 (en) | 1987-01-22 | 1987-01-22 | Water heater with hot water filling circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63116848U JPS63116848U (en) | 1988-07-28 |
| JPH0623871Y2 true JPH0623871Y2 (en) | 1994-06-22 |
Family
ID=30792095
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987008061U Expired - Lifetime JPH0623871Y2 (en) | 1987-01-22 | 1987-01-22 | Water heater with hot water filling circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0623871Y2 (en) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5597564A (en) * | 1979-01-18 | 1980-07-24 | Tlv Co Ltd | Valve to serve as orifice |
| JPS56147968A (en) * | 1980-04-15 | 1981-11-17 | Matsushita Electric Works Ltd | Valve |
| JPS5921440U (en) * | 1982-07-30 | 1984-02-09 | 株式会社ノーリツ | 1 can 2 circuit hot water bath pot |
| JPS59133941U (en) * | 1983-02-28 | 1984-09-07 | 株式会社ハ−マン | General hot water supply / high temperature hot water supply switching type instantaneous water heater |
| JPH035817Y2 (en) * | 1986-05-24 | 1991-02-14 |
-
1987
- 1987-01-22 JP JP1987008061U patent/JPH0623871Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63116848U (en) | 1988-07-28 |
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