JPH07103573A - Bath boiler with hot water supplying device - Google Patents
Bath boiler with hot water supplying deviceInfo
- Publication number
- JPH07103573A JPH07103573A JP5269631A JP26963193A JPH07103573A JP H07103573 A JPH07103573 A JP H07103573A JP 5269631 A JP5269631 A JP 5269631A JP 26963193 A JP26963193 A JP 26963193A JP H07103573 A JPH07103573 A JP H07103573A
- Authority
- JP
- Japan
- Prior art keywords
- hot water
- bathtub
- amount
- temperature
- circulation
- 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
Landscapes
- Control For Baths (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、給湯器により加熱され
た湯を浴槽へ給湯し、また浴槽内の湯を循環加熱して追
い焚きすることのできる給湯器付風呂釜において、浴槽
内の湯量を算出し不足する分量の湯を自動的に給湯して
浴槽を所望の湯量とする給湯器付風呂釜に関するもので
ある。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bathtub with a water heater, which is capable of supplying hot water heated by a water heater to a bathtub and circulatingly heating the hot water in the bathtub to reheat it. The present invention relates to a bath kettle with a water heater, which calculates the amount of hot water and automatically supplies the insufficient amount of hot water to bring the bath to a desired amount.
【０００２】[0002]
【従来の技術】従来から、浴槽に入れた水をポンプによ
り強制的に循環させ、循環管路途中に設けた熱交換器に
より加熱する循環加熱回路と、上水道等から取り入れ別
の熱交換器により加熱した湯を循環回路を経由して浴槽
に供給する給湯回路とを備えた給湯器付風呂釜が使用さ
れている。この種の給湯器付風呂釜には、水温センサを
有し、追い焚きしたときの温度上昇から浴槽内の湯量を
算出し、不足する分量の湯を自動的に給湯して所望の水
位とするものもある。このような制御を行う例として、
特開昭６１−１５０４７号公報に記載されているものが
挙げられる。同号公報に開示される制御方法は、浴槽内
の湯を一定時間加熱し、そのときの温度上昇から浴槽内
の湯量を算出し、その算出値に基づいて湯の給湯量を決
定することをその要点とする。2. Description of the Related Art Conventionally, a circulation heating circuit for forcibly circulating water in a bathtub by a pump and heating it by a heat exchanger installed in the middle of a circulation pipe, and another heat exchanger taken from water supply or the like. A bath kettle with a water heater having a hot water supply circuit for supplying heated hot water to a bathtub via a circulation circuit is used. This type of bath kettle with a water heater has a water temperature sensor, calculates the amount of hot water in the bath from the temperature rise when reheating, and automatically supplies the insufficient amount of hot water to reach the desired water level. There are also things. As an example of performing such control,
Examples thereof include those described in JP-A-61-15047. The control method disclosed in the same publication is to heat the hot water in the bathtub for a certain period of time, calculate the hot water amount in the bathtub from the temperature rise at that time, and determine the hot water supply amount of hot water based on the calculated value. This is the main point.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、前記公
報に示される従来の給湯器制御には、以下の問題点があ
った。即ち、前記公報の給湯器制御では、基本的に一定
時間加熱したときの供給熱量をそのときの温度上昇で除
して湯量の算出を行うのであるが、湯に加えられた熱量
の算定に当たり熱交換器の熱効率は考慮しても配管や浴
槽等各部分で放熱があることを考慮していない。この放
熱量が常に一定であるならば、熱交換器の熱効率にその
分を見込んでおけばよいが、実際には同一機種の風呂釜
でも設置状況に応じた配管長等により異なり、更に同じ
風呂釜でも水温や外気温により異なる。特に問題なの
は、季節により外気温に２０℃を超える差があるため冬
季と夏期とで放熱量が大きく異なり、その影響が無視で
きないことである。However, the conventional water heater control disclosed in the above publication has the following problems. That is, in the water heater control of the above publication, basically, the amount of heat supplied when heated for a certain period of time is divided by the temperature rise at that time to calculate the amount of hot water, but when calculating the amount of heat added to the hot water Even if the heat efficiency of the exchanger is taken into consideration, the fact that heat is dissipated in each part such as the piping and bathtub is not considered. If this amount of heat radiation is always constant, the heat efficiency of the heat exchanger should be taken into consideration, but in reality, even the bath model of the same model will differ depending on the pipe length, etc., depending on the installation conditions, and the same bath Even in the kettle, it depends on the water temperature and the outside temperature. A particular problem is that there is a large difference in outside air temperature of more than 20 ° C. depending on the season, so the amount of heat radiation differs greatly between winter and summer, and the effect cannot be ignored.
【０００４】例えば夏期には、外気温が３０℃近くある
場合があり、その場合湯温と外気温との差は１０℃程度
しかない。従って放熱量は少なく、バーナからの供給熱
量の大半は水温上昇に使われることとなる。このため水
温上昇幅が大きく、浴槽内の湯量が小さめに算出され、
多量の給湯がなされることになる。一方、冬季の夜間に
は、外気温が０℃程度まで下がり、その場合湯温と外気
温との差は４０℃近くに達し、放熱量が多い。従って、
バーナからの供給熱量が同じであっても夏期と比較して
水温上昇幅が小さく、結果的に浴槽内の湯量が実際より
かなり大きく算出されてしまうので、給湯量が過小とな
ることとなる。即ち、充分な量の湯を必要とする冬季に
逆に湯不足になる傾向がある。In the summer, for example, the outside air temperature may be around 30 ° C. In that case, the difference between the hot water temperature and the outside air temperature is only about 10 ° C. Therefore, the amount of heat released is small, and most of the amount of heat supplied from the burner is used to raise the water temperature. Therefore, the water temperature increase range is large and the amount of hot water in the bathtub is calculated to be small,
A large amount of hot water will be supplied. On the other hand, at night in winter, the outside air temperature drops to about 0 ° C., in which case the difference between the hot water temperature and the outside air temperature reaches nearly 40 ° C., and the amount of heat radiation is large. Therefore,
Even if the amount of heat supplied from the burner is the same, the amount of rise in water temperature is small compared to summer, and as a result, the amount of hot water in the bathtub is calculated to be considerably larger than it actually is, so the amount of hot water supplied is too small. That is, there is a tendency for the hot water to run short in the winter when a sufficient amount of hot water is required.
【０００５】本発明は、前記従来技術の問題点を解決
し、配管や浴槽等からの放熱を考慮に入れることによ
り、外気温の影響を受けずに浴槽内の湯量を算出し、季
節に関係なく高精度に給湯量を決定して適切な足し湯を
することができる給湯器付風呂釜を提供することを目的
とする。The present invention solves the above-mentioned problems of the prior art, and by taking into account the heat radiation from pipes, bathtubs, etc., the amount of hot water in the bathtub is calculated without being affected by the outside temperature, and it is related to the season. It is an object of the present invention to provide a bath kettle with a water heater that can appropriately determine the amount of hot water to be supplied and provide appropriate hot water.
【０００６】[0006]
【課題を解決するための手段】この目的を達成するため
本発明の給湯器付風呂釜は、浴槽へ湯を供給する給湯手
段と、浴槽内の湯を循環加熱する循環加熱手段と、浴槽
内の湯温を検知する湯温検知手段と、湯温検知手段が検
知した湯温に基づいて前記循環加熱手段を制御する加熱
制御手段とを有する給湯器付風呂釜において、浴槽内の
湯の有無を判断する湯有無判断手段と、外気温度等の影
響による放熱量を演算する放熱量演算手段と、前記放熱
量を考慮して浴槽内の湯量を算出する湯量演算手段と、
湯量演算手段の算出結果に基づき前記給湯手段により不
足湯量を自動的に足し湯する給湯指令手段とを有するこ
とを要旨とするものである。In order to achieve this object, a bath with a water heater according to the present invention comprises a hot water supply means for supplying hot water to a bathtub, a circulation heating means for circulatingly heating the hot water in the bathtub, and a bathtub inside. The presence or absence of hot water in the bathtub in the bathtub with a water heater having hot water temperature detecting means for detecting the hot water temperature of the hot water, and heating control means for controlling the circulating heating means based on the hot water temperature detected by the hot water temperature detecting means. Hot water presence / absence determining means, heat radiation amount calculating means for calculating the heat radiation amount due to the influence of the outside air temperature, and hot water amount calculating means for calculating the hot water amount in the bathtub in consideration of the heat radiation amount,
The gist of the present invention is to have hot water supply command means for automatically adding the amount of insufficient hot water by the hot water supply means based on the calculation result of the hot water quantity calculation means.
【０００７】ここにおいて、前記放熱量演算手段は、前
記循環加熱手段の循環配管からの配管放熱量及び／又は
浴槽からの浴槽放熱量を演算するものであって、前記配
管放熱量はある温度まで浴槽内の湯を循環加熱したとき
及び／又は一定時間浴槽内の湯を循環したときの循環流
量と外気温度と循環加熱時間及び循環時間とにより演算
されるものであり、前記浴槽放熱量は外気温度と経過時
間とにより演算されるものである。そして、前記湯量演
算手段は、 Ｑ ＝ （ＩＰ×η×ｔ1 −Ｗ）／（Ｙ＋Ｔ2 −Ｔ1 ） （ＩＰはガスインプット量、ηは熱効率、ｔ1 は循環加
熱時間、Ｗは循環配管からの配管放熱量、Ｙは浴槽から
の放熱による温度降下、Ｔ2 −Ｔ1 は循環加熱の温度上
昇）なる式により浴槽内の湯量Ｑを算出するものであ
る。Here, the heat radiation amount calculation means calculates the heat radiation amount of the pipe from the circulation pipe of the circulation heating means and / or the heat radiation amount of the bathtub from the bathtub, and the heat radiation amount of the pipe is up to a certain temperature. When the hot water in the bathtub is circulated and / or heated and / or the hot water in the bathtub is circulated for a certain period of time, it is calculated by the circulation flow rate, the outside air temperature, the circulation heating time, and the circulation time. It is calculated from the temperature and the elapsed time. Then, the hot water amount calculating means is: Q = (IP × η × t1 −W) / (Y + T2 −T1) (IP is the gas input amount, η is the thermal efficiency, t1 is the circulation heating time, and W is the pipe discharge from the circulation pipe. The amount of heat, Y is the temperature drop due to heat radiation from the bathtub, and T2-T1 is the temperature rise of the circulation heating), and the amount Q of hot water in the bathtub is calculated.
【０００８】[0008]
【作用】前記構成を有する本発明の給湯器付風呂釜で
は、まず浴槽内の浴槽内の湯の存在の有無を湯有無判断
手段が判断する。浴槽内に湯がある場合には湯温検知手
段が湯の初期温度を検知し、加熱制御手段の制御により
循環加熱手段が浴槽内の湯を設定温度まで循環加熱し、
更に所定時間浴槽内の湯を循環し、湯温検知手段が浴槽
内の湯の温度を再び検知する。そして、放熱量演算手段
が外気温度等により影響される放熱量を演算し、その放
熱量を考慮して湯量演算手段が浴槽内の湯量を算出し、
不足ある場合には給湯指令手段の指令により給湯手段が
不足分を自動的に給湯する。In the bathtub with a hot water supply device of the present invention having the above-described structure, the presence / absence of hot water in the bathtub first determines the presence / absence of hot water in the bathtub. When there is hot water in the bathtub, the hot water temperature detecting means detects the initial temperature of the hot water, and the circulation heating means circulates and heats the hot water in the bathtub to the set temperature under the control of the heating control means,
Further, the hot water in the bathtub is circulated for a predetermined time, and the hot water temperature detecting means detects the temperature of the hot water in the bathtub again. Then, the heat radiation amount calculation means calculates the heat radiation amount affected by the outside air temperature and the like, and the hot water amount calculation means calculates the hot water amount in the bath in consideration of the heat radiation amount,
When there is a shortage, the hot water supply means automatically supplies the shortage according to a command from the hot water supply instruction means.
【０００９】ここにおいて請求項２の発明に係る給湯器
付風呂釜では、放熱量演算手段は、ある温度まで浴槽内
の湯を循環加熱したとき及び／又は一定時間浴槽内の湯
を循環したときの循環流量と外気温度と循環加熱時間及
び循環時間とにより配管放熱量を演算し、及び／又は、
外気温度と経過時間とにより浴槽放熱量を演算する。ま
た請求項３の発明に係る給湯器付風呂釜では、湯量演算
手段は、ガスインプット量ＩＰ、熱効率η、循環加熱時
間ｔ1 、配管放熱量Ｗ、浴槽放熱による温度降下Ｙ、循
環加熱の温度上昇Ｔ2 −Ｔ1 から、 Ｑ ＝ （ＩＰ×η×ｔ1 −Ｗ）／（Ｙ＋Ｔ2 −Ｔ1 ） なる式により浴槽内の湯量Ｑを算出する。In the bathtub with a water heater according to the second aspect of the present invention, the heat radiation amount calculating means circulates and heats the hot water in the bathtub to a certain temperature and / or circulates the hot water in the bathtub for a certain period of time. The heat radiation amount of the pipe is calculated from the circulation flow rate, the outside air temperature, the circulation heating time, and the circulation time, and / or
The bath heat dissipation is calculated from the outside air temperature and the elapsed time. In addition, in the bathtub with a water heater according to the invention of claim 3, the hot water amount calculating means includes the gas input amount IP, the thermal efficiency η, the circulation heating time t1, the heat radiation amount W of the pipe, the temperature drop Y due to the heat radiation of the bath, and the temperature increase of the circulation heating. From T2-T1, the amount Q of hot water in the bathtub is calculated by the following equation: Q = (IP * [eta] * t1-W) / (Y + T2-T1).
【００１０】[0010]
【実施例】以下、本発明を具体化した一実施例である給
湯器付風呂釜を図面を参照して説明する。図１に給湯器
付風呂釜の全体構成を示す。風呂釜１は、浴槽２の水を
循環加熱する循環加熱部１０と、水道水等をガス燃焼に
より加熱して得た湯を循環加熱部１０を経由して浴槽２
に供給する給湯器部３０とより構成され、これらの動作
を制御するコントローラ５０を有している。DESCRIPTION OF THE PREFERRED EMBODIMENTS A bath kettle with a water heater, which is an embodiment of the present invention, will be described below with reference to the drawings. Figure 1 shows the overall structure of a bath kettle with a water heater. The bath kettle 1 includes a circulation heating unit 10 that circulates and heats water in the bathtub 2, and hot water obtained by heating tap water or the like by gas combustion via the circulation heating unit 10 to the bathtub 2
And a controller 50 for controlling these operations.
【００１１】給湯器部３０は、水道水等の冷水が供給さ
れる給水路３１と、給水路３１に接続される熱交換器３
２と、熱交換器３２の下流側に接続される出湯路３３
と、出湯路３３をＡ点で分岐して設けられる風呂給湯路
３４、一般給湯路３５とで流路を構成する。給水路３１
には流量を検出する流量センサ３６と、入水温を検出す
るサーミスタ３７とが、出湯路３３には出湯温を検出す
るサーミスタ３９がそれぞれ設けられる。The water heater unit 30 includes a water supply passage 31 to which cold water such as tap water is supplied, and a heat exchanger 3 connected to the water supply passage 31.
2 and a hot water outlet 33 connected to the downstream side of the heat exchanger 32
A bath hot water supply passage 34 and a general hot water supply passage 35, which are provided by branching the hot water discharge passage 33 at point A, constitute a flow passage. Water supply channel 31
A flow rate sensor 36 for detecting the flow rate, a thermistor 37 for detecting the incoming water temperature, and a thermistor 39 for detecting the hot water temperature are provided in the hot water outlet 33, respectively.
【００１２】熱交換器３２の下方にはバーナ４０が設け
られると共に、そのガス導管４１にはガス流路を開閉す
る元電磁弁４２とガス流量調整用の比例制御弁４３とが
設けられる。出湯路３３から分岐した風呂給湯路３４
は、その開閉を行う給水弁４４と、浴槽２への給湯流量
を検出する流量センサ４５と、縁切り弁４６と、循環加
熱部１０から給湯器部３０への逆流を防止する逆止弁４
７とを備え、循環加熱部１０にＢ点で接続される。一
方、出湯路３３から分岐した一般給湯路３５には、洗面
所、シャワー等の給湯栓５に通じる外部給湯管４が接続
される。A burner 40 is provided below the heat exchanger 32, and a gas conduit 41 thereof is provided with an original solenoid valve 42 for opening and closing a gas flow path and a proportional control valve 43 for adjusting the gas flow rate. Bath hot water supply path 34 branched from the hot water supply path 33
Is a water supply valve 44 that opens and closes it, a flow rate sensor 45 that detects the flow rate of hot water supplied to the bathtub 2, an edge cutoff valve 46, and a check valve 4 that prevents backflow from the circulation heating unit 10 to the water heater unit 30.
7 and is connected to the circulation heating unit 10 at a point B. On the other hand, an external hot water supply pipe 4 leading to a hot water tap 5 such as a washroom or a shower is connected to the general hot water supply passage 35 branched from the hot water discharge passage 33.
【００１３】循環加熱部１０は、浴槽２の水を循環させ
る釜内循環路１１が流路をなし、その途中にバーナ１２
により加熱される熱交換器１３を有している。そして、
釜内循環路１１の熱交換器１３より上流側には、水流の
有無を検知する水流スイッチ１４、浴槽２の水を釜内循
環路１１に循環させる循環ポンプ１５、浴槽２からの入
水温を検出するサーミスタ１８が備えられ、釜内循環路
１１の熱交換器１３より下流側には、バーナ１２により
加熱された湯温を検出するサーミスタ１９が備えられ
る。バーナ１２のガス導管２０には、元電磁弁２１、主
電磁弁２２が設けられている。釜内循環路１１は、往き
配管６、戻り配管７に接続され浴槽２と連通される。
尚、循環加熱部１０及び給湯器部３０には、図示しない
が燃焼用空気を供給するファンや、点火装置、燃焼安全
スイッチ等が設けられる。そしてこれらの他、外部の気
温を検知する外気温センサ９が設けられている。In the circulation heating section 10, an in-cylinder circulation path 11 for circulating the water in the bath 2 forms a flow path, and a burner 12 is provided in the middle thereof.
It has the heat exchanger 13 heated by. And
A water flow switch 14 for detecting the presence or absence of a water flow, a circulation pump 15 for circulating the water in the bathtub 2 to the bath circulation circuit 11, and an incoming water temperature from the bathtub 2 are provided on the upstream side of the heat exchanger 13 in the bath circulation path 11. A thermistor 18 for detecting the temperature is provided, and a thermistor 19 for detecting the temperature of the hot water heated by the burner 12 is provided on the downstream side of the heat exchanger 13 in the circulation path 11 in the kettle. The gas conduit 20 of the burner 12 is provided with a source solenoid valve 21 and a main solenoid valve 22. The in-kettle circulation path 11 is connected to the outflow pipe 6 and the return pipe 7 and communicates with the bathtub 2.
The circulation heating unit 10 and the water heater unit 30 are provided with a fan for supplying combustion air, an ignition device, a combustion safety switch, and the like, which are not shown. In addition to these, an outside air temperature sensor 9 for detecting the outside air temperature is provided.
【００１４】コントローラ５０は、自動風呂給湯制御、
循環加熱制御、一般給湯制御等を司るものであって、公
知の論理演算回路を構成するＣＰＵと、各種プログラム
を記憶しておくＲＯＭと、データの一時記憶を行うＲＡ
Ｍと、各種センサ類からの信号を入力する入力インター
フェースと、各種アクチュエータ類に駆動信号を出力す
る出力インターフェースと等により構成される。そして
後述する自動給湯制御を行うためＲＯＭには、浴槽内の
湯量算出プログラム、給湯指令プログラムや各種数値等
が記憶されている。同様にＲＡＭには、温度メモリエリ
ア、時間メモリエリア等が設けられている。The controller 50 has an automatic bath hot water supply control,
It controls circulation heating control, general hot water supply control, and the like, and includes a CPU that constitutes a known logical operation circuit, a ROM that stores various programs, and an RA that temporarily stores data.
M, an input interface for inputting signals from various sensors, an output interface for outputting drive signals to various actuators, and the like. In order to perform automatic hot water supply control, which will be described later, the ROM stores a hot water amount calculation program in the bathtub, a hot water supply command program, various numerical values, and the like. Similarly, the RAM is provided with a temperature memory area, a time memory area, and the like.
【００１５】前記構成を有する風呂釜１の基本的な動作
を説明する。まず、浴槽２に湯を供給する場合には、風
呂給湯路３４の給水弁４４を開き水流を検知すると、給
湯器部３０の元電磁弁４２を開いてバーナ４０に点火す
る。すると、熱交換器３２を通過するときにバーナ４０
におけるガスの燃焼熱により加熱され所定温度の湯とな
り、出湯路３３に送出され、Ａ点から風呂給湯路３４を
経由してＢ点で釜内循環路１１に流入し、往き配管６及
び戻り配管７を通って浴槽２に供給される。The basic operation of the bathtub 1 having the above construction will be described. First, when hot water is supplied to the bathtub 2, when the water supply valve 44 of the bath hot water supply passage 34 is opened and the water flow is detected, the original electromagnetic valve 42 of the water heater unit 30 is opened to ignite the burner 40. Then, when passing through the heat exchanger 32, the burner 40
Is heated by the heat of combustion of the gas in the tank to become hot water of a predetermined temperature, is sent to the hot water outlet path 33, flows from the point A into the bath internal circulation path 11 at the point B via the bath hot water supply path 34, and the outgoing pipe 6 and the return pipe It is supplied to the bathtub 2 through 7.
【００１６】ここで、コントローラ５０により、サーミ
スタ３９が検出した出湯温度と予め設定された設定温度
とに基づくフィードバック制御と、サーミスタ３７が検
出した入水温度と流量センサ３６が検出した入水流量と
に基づくフィードフォワード制御との併用で燃焼量（比
例制御弁４３）を制御することができる。尚ここで、給
水弁４４を閉じてかわりに外部の給湯栓５を開けば、熱
交換器３２で加熱された湯は、出湯路３３から一般給湯
路３５を経由して外部給湯管４へ流れ、洗面所やシャワ
ー等で湯を利用することができる。Here, the controller 50 performs feedback control based on the hot water temperature detected by the thermistor 39 and a preset temperature, and based on the incoming water temperature detected by the thermistor 37 and the incoming water flow rate detected by the flow rate sensor 36. The combustion amount (proportional control valve 43) can be controlled in combination with the feedforward control. Here, if the water supply valve 44 is closed and the external hot water tap 5 is opened instead, the hot water heated in the heat exchanger 32 flows from the hot water outlet 33 to the external hot water supply pipe 4 via the general hot water supply passage 35. You can use hot water in the bathroom or shower.
【００１７】浴槽２の水を循環加熱、いわゆる追い焚き
する場合は、給水弁４４を閉じ釜内循環路１１の循環ポ
ンプ１５を駆動すると、浴槽２の水が戻り配管７から釜
内循環路１１に流入し、往き配管６を経由して浴槽２に
循環される。ここで、風呂給湯路３４に逆止弁４７が設
けられているので、浴槽２の水が給湯器部３０に逆流し
て給湯栓５に至ることはない。そして、元電磁弁２１、
主電磁弁２２を開いてバーナ１２に点火すれば、釜内循
環路１１の熱交換器１３を流れる水が燃焼熱により加熱
される。前記各動作は手動若しくはコントローラ５０に
より行われ、使用者は公知のリモコン装置等によりコン
トローラ５０に種々の指令をすることができる。When the water in the bathtub 2 is circulated and heated, that is, reheated, when the water supply valve 44 is closed and the circulation pump 15 of the in-cylinder circulation line 11 is driven, the water in the bathtub 2 is returned from the return pipe 7 to the in-cylinder circulation line 11. And is circulated to the bathtub 2 via the outgoing pipe 6. Here, since the check valve 47 is provided in the bath hot water supply passage 34, the water in the bathtub 2 does not flow back to the hot water supply unit 30 and reach the hot water tap 5. And the former solenoid valve 21,
When the main solenoid valve 22 is opened and the burner 12 is ignited, the water flowing through the heat exchanger 13 in the in-cylinder circulation path 11 is heated by the combustion heat. Each operation described above is performed manually or by the controller 50, and the user can issue various commands to the controller 50 by using a known remote control device or the like.
【００１８】次に、前記の構成及び基本動作を有する風
呂釜１における、本発明としての特徴であるコントロー
ラ５０により実行される自動給湯制御について説明す
る。自動給湯制御は、浴槽２に浴槽内の湯がある場合に
これを追い焚きし、その際の放熱を加味した供給熱量と
上昇温度とから浴槽内の湯の量を算出して、湯量の不足
分を給湯器部３０から給湯して補充し、浴槽２の湯を適
温適量にするものである。Next, the automatic hot water supply control executed by the controller 50, which is a feature of the present invention, in the bathtub 1 having the above-described structure and basic operation will be described. When there is hot water in the bathtub in the bathtub 2, the automatic hot water supply control calculates the amount of hot water in the bathtub from the amount of heat supplied and the rising temperature in consideration of the heat radiation at that time, and the amount of hot water is insufficient. The hot water is supplied from the hot water supply unit 30 to replenish the water, and the hot water in the bathtub 2 is adjusted to an appropriate temperature and amount.
【００１９】自動給湯制御ルーチンについて、図２のフ
ローチャートを参照して説明する。このルーチンにはい
ると、まず釜内循環路１１に設けられている循環ポンプ
１５を駆動する（Ｓ１）。浴槽２に浴槽内の湯があるか
どうかを判断するためである。次に、水流スイッチ１４
がオンされたか否かをコントローラ５０が判断する（Ｓ
２）。Ｓ２で水流スイッチ１４がオンされていない場合
（Ｓ２：Ｎｏ）には浴槽２に浴槽内の湯がないと判断し
この場合には、コントローラ５０のＲＯＭに予め記憶さ
れている設定湯量の湯を給湯器部３０から浴槽２へ供給
する（Ｓ３）。The automatic hot water supply control routine will be described with reference to the flowchart of FIG. When this routine is entered, first, the circulation pump 15 provided in the shuttle circulation circuit 11 is driven (S1). This is for determining whether or not there is hot water in the bathtub 2. Next, the water flow switch 14
The controller 50 determines whether or not is turned on (S
2). When the water flow switch 14 is not turned on in S2 (S2: No), it is determined that there is no hot water in the bathtub in the bathtub 2, and in this case, the set amount of hot water stored in advance in the ROM of the controller 50 is used. The water is supplied from the water heater 30 to the bathtub 2 (S3).
【００２０】そして、サーミスタ１８の検出温度を読み
とり（Ｓ４）、設定温度Ｔs 以上であるか否かをコント
ローラ５０が判断する（Ｓ５）。設定温度Ｔs は入浴適
温であって、コントローラ５０のＲＯＭに予めテーブル
として記憶されている中から入浴者が好みにより選択す
るものである。設定温度Ｔs 以上である場合（Ｓ５：Ｙ
ｅｓ）には、そのまま後述するＳ１６の保温モードへ移
行する。設定温度Ｔs 以下である場合（Ｓ５：Ｎｏ）に
は、循環加熱部１０により設定温度Ｔs まで循環追い焚
きする（Ｓ６）。湯が設定温度Ｔs になった後は、攪拌
のため所定時間循環を続け（Ｓ７）てから、後述するＳ
１６の保温モードへ移行する。Then, the temperature detected by the thermistor 18 is read (S4), and the controller 50 judges whether the temperature is equal to or higher than the set temperature Ts (S5). The set temperature Ts is suitable for bathing and is selected by the bather according to his / her preference from a table stored in the ROM of the controller 50 in advance. When the temperature is equal to or higher than the set temperature Ts (S5: Y
In es), the process directly shifts to the heat retention mode of S16 described later. When the temperature is equal to or lower than the set temperature Ts (S5: No), the circulation heating unit 10 reheats the circulation to the set temperature Ts (S6). After the hot water reaches the set temperature Ts, the circulation is continued for a predetermined time for stirring (S7), and then S described later is performed.
It shifts to 16 heat retention mode.
【００２１】Ｓ２で水流スイッチ１４がオンされた場合
（Ｓ２：Ｙｅｓ）には、浴槽２に浴槽内の湯があると判
断し、このルーチンの特徴である浴槽内の湯量Ｑの算出
を、浴槽２や循環配管（釜内循環路１１、往き配管６、
戻り配管７、以下単に「配管」という）からの放熱を加
味して行う。浴槽内の湯量Ｑの算出は、湯の循環や循環
加熱に要した時間やその間の温度変化等を基に行う。こ
のためまず、循環ポンプ１５を停止しないで循環を継続
しつつサーミスタ１８の検出温度を読みとる（Ｓ８）。
浴槽内の湯の初期温度Ｔ1 を知るためである。測定した
初期温度Ｔ1 は、コントローラ５０のＲＡＭの温度メモ
リエリアに記憶される。後述する浴槽内の湯量演算のた
めである。When the water flow switch 14 is turned on in S2 (S2: Yes), it is determined that there is hot water in the bathtub 2 and the calculation of the hot water amount Q in the bathtub, which is a feature of this routine, is performed. 2 and circulation piping (cylinder circulation path 11, forward piping 6,
The heat is radiated from the return pipe 7, hereinafter simply referred to as "pipe"). The amount Q of hot water in the bathtub is calculated based on the time required for circulation and heating of the hot water, the temperature change during that time, and the like. Therefore, first, the temperature detected by the thermistor 18 is read while continuing the circulation without stopping the circulation pump 15 (S8).
This is to know the initial temperature T1 of the hot water in the bathtub. The measured initial temperature T1 is stored in the temperature memory area of the RAM of the controller 50. This is for calculating the amount of hot water in the bath, which will be described later.
【００２２】次に、循環加熱部１０により設定温度Ｔs
まで追い焚きする（Ｓ９）。この追い焚きの際に、バー
ナ１２への戻り湯温θ1 をサーミスタ１８により検出
し、バーナ１２からの往き湯温θ2 をサーミスタ１９に
より検出し、これらをコントローラ５０のＲＡＭの温度
メモリエリアに記憶する。また、追い焚きに要した時間
ｔ1 （分）をＲＡＭの時間メモリエリアに記憶する。後
述する浴槽内の湯量演算のためである。設定温度Ｔs ま
での追い焚きの終了後、循環ポンプ１５による循環を所
定時間ｔ2 （分）継続する（Ｓ１０）。循環時間ｔ2 は
コントローラ５０のＲＯＭに予め記憶されている。そし
て循環終了時に、サーミスタ１８の検出温度を読みとる
（Ｓ１１）。浴槽内の湯の温度Ｔ2 を知るためである。
測定した温度Ｔ2 は、コントローラ５０のＲＡＭの温度
メモリエリアに記憶される。後述する浴槽内の湯量演算
のためである。Next, the circulating heating unit 10 sets the set temperature Ts.
Boil up to (S9). During the reheating, the hot water temperature θ1 returned to the burner 12 is detected by the thermistor 18, the hot water temperature θ2 coming from the burner 12 is detected by the thermistor 19, and these are stored in the temperature memory area of the RAM of the controller 50. . Also, the time t1 (minutes) required for reheating is stored in the time memory area of the RAM. This is for calculating the amount of hot water in the bath, which will be described later. After the reheating to the set temperature Ts is completed, the circulation by the circulation pump 15 is continued for a predetermined time t2 (minutes) (S10). The circulation time t2 is stored in advance in the ROM of the controller 50. Then, at the end of circulation, the temperature detected by the thermistor 18 is read (S11). This is to know the temperature T2 of the hot water in the bathtub.
The measured temperature T2 is stored in the temperature memory area of the RAM of the controller 50. This is for calculating the amount of hot water in the bath, which will be described later.
【００２３】ここで、浴槽内の湯量Ｑの算出を行う（Ｓ
１２）。浴槽内の湯量Ｑの算出は、温度Ｔ1 、Ｔ2 、θ
1 、θ2 、時間ｔ1 、ｔ2 等を基に行うのであるが、詳
細は後述する。そして、算出された湯量がコントローラ
５０のＲＯＭに予め記憶されている設定湯量以上あるか
否かを判断する（Ｓ１３）。設定湯量以上ある場合（Ｓ
１３：Ｙｅｓ）には、そのまま後述するＳ１６の保温モ
ードへ移行する。設定湯量以上ないと判断された場合
（Ｓ１３：Ｎｏ）には、不足する分量の湯を給湯器部３
０から足し湯する（Ｓ１４）。そして、足し湯により若
干湯温が下がるので、設定温度Ｔs になるまで追い焚き
し（Ｓ１５）てからＳ１６の保温モードへ移行する。Ｓ
１６の保温モードでは、適当な頻度でサーミスタ１８に
より浴槽温度を読みとり、設定温度Ｔs より低い場合に
は設定温度Ｔs まで追い焚きすることにより、浴槽２の
湯温を設定温度Ｔs に維持する。Here, the amount Q of hot water in the bathtub is calculated (S
12). The amount of hot water Q in the bathtub is calculated by using the temperatures T1, T2, θ.
It is performed based on 1, θ2, time t1, t2, etc., which will be described later in detail. Then, it is determined whether or not the calculated amount of hot water is equal to or more than the set amount of hot water stored in advance in the ROM of the controller 50 (S13). When there is more than the set amount of hot water (S
13: Yes), the process directly shifts to the heat retention mode of S16 described later. When it is determined that the amount of hot water is not more than the set amount (S13: No), the insufficient amount of hot water is supplied to the water heater unit 3
Add hot water from 0 (S14). Then, since the hot water temperature is slightly lowered by the supplementary hot water, additional heating is performed until the temperature reaches the set temperature Ts (S15), and then the heat retention mode of S16 is entered. S
In the heat retention mode of 16, the bath temperature is read by the thermistor 18 at an appropriate frequency, and when the temperature is lower than the set temperature Ts, it is heated to the set temperature Ts to maintain the hot water temperature of the bath 2 at the set temperature Ts.
【００２４】続いて、前記Ｓ１２で行う浴槽内の湯量Ｑ
（リットル）の算出の詳細を説明する。浴槽内の湯量Ｑの算
出は、基本的には次の（１）式に基づいて行う。 Ｑ ＝ （Ｚ−Ｗ）／（Ｘ＋Ｙ） （１） ここで、Ｚはバーナ１２による湯への加熱量（kcal）で
あって熱交換器１３の熱効率を加味したもの、Ｗは配管
からの放熱量（kcal）、Ｘは追い焚きによる湯の上昇温
度（度）、Ｙは浴槽２からの放熱による湯の温度降下
（度）を表す。Next, the amount Q of hot water in the bathtub to be carried out in S12.
Details of calculation of (liter) will be described. The amount of hot water Q in the bathtub is basically calculated based on the following equation (1). Q = (Z−W) / (X + Y) (1) Here, Z is the heating amount (kcal) to the hot water by the burner 12, which takes into account the thermal efficiency of the heat exchanger 13, and W is the discharge from the pipe. The amount of heat (kcal), X represents the rising temperature (degrees) of the hot water due to reheating, and Y represents the temperature drop (degree) of the hot water due to heat radiation from the bathtub 2.
【００２５】即ち、加熱量Ｚを上昇温度Ｘで割れば、水
の比熱が１（kcal／（度・リットル））であるからおおよそ
の湯量Ｑが求められるのであるが、加熱量Ｚの一部が配
管から放熱して温度上昇Ｘに貢献しないことと、実測さ
れる温度上昇Ｘは浴槽２からの放熱による温度降下Ｙの
分小さいこととを考慮してより高精度な浴槽内の湯量Ｑ
の算出を行うものである。これら放熱は、特に季節によ
る外気温度Ｔo の違いにより大きく左右され、給湯制御
の誤差を招くことから、これを緩和して高精度な給湯制
御を行うためである。以下順に説明する。That is, if the heating amount Z is divided by the rising temperature X, an approximate amount of hot water Q is obtained because the specific heat of water is 1 (kcal / (degree.liter)). Considering that the heat is not radiated from the pipe and does not contribute to the temperature rise X, and that the actually measured temperature rise X is small by the temperature drop Y due to heat radiation from the bathtub 2, the more accurate amount Q of hot water in the bathtub.
Is calculated. This heat radiation is largely influenced by the difference in the outside air temperature To depending on the season and causes an error in the hot water supply control. This is to alleviate this and perform high-precision hot water supply control. The following will be described in order.
【００２６】Ｚは（２）式により計算される。 Ｚ ＝ ＩＰ×η×ｔ1 （２） ここで、ＩＰは時間当りの供給熱量（kcal／分）であっ
てガス流量により定まるものであり、コントローラ５０
のＲＯＭにテーブルとして記憶されている。ηは供給熱
量のうち水温上昇に使われる熱効率であって風呂釜ごと
に既知の値であり、コントローラ５０のＲＯＭに記憶さ
れている。ｔ1 は前記Ｓ９でした追い焚き時間（分）で
ある。Z is calculated by the equation (2). Z = IP × η × t1 (2) Here, IP is the heat supply amount per hour (kcal / min) and is determined by the gas flow rate, and the controller 50
Is stored as a table in the ROM. η is a thermal efficiency used to raise the water temperature in the supplied heat amount, which is a known value for each bath and is stored in the ROM of the controller 50. t1 is the reheating time (minutes) in S9.
【００２７】次にＷは、追い焚き（Ｓ９）時の配管放熱
Ｗ1 と、その後の循環（Ｓ１０）時の配管放熱Ｗ2 との
和（Ｗ＝Ｗ1 ＋Ｗ2 ）である。追い焚き時にはバーナ１
２を通過した直後の高温の湯から大きな放熱があるのに
対し、循環のみ行っているときには放熱が小さいことか
ら、Ｗ1 とＷ2 とを区別して考慮する必要がある。追い
焚き時の配管放熱Ｗ1 は、（３）式により計算される。 Ｗ1 ＝ Ｋ2 ×Ｒ×ｔ1 （３）Next, W is the sum (W = W1 + W2) of the heat dissipation W1 of the pipe during reheating (S9) and the heat dissipation W2 of the pipe during subsequent circulation (S10). Burner 1 when reheating
Although there is a great deal of heat radiation from the hot water immediately after passing through No. 2, it is necessary to distinguish between W1 and W2 because the heat radiation is small when only circulating. The pipe heat radiation W1 at the time of reheating is calculated by the equation (3). W1 = K2 x R x t1 (3)
【００２８】ここで、Ｋ2 は追い焚き時における配管の
放熱温度降下（度）、Ｒは配管の循環流量（リットル／分）
を表す。Ｋ2 は外気温度Ｔo と配管距離Ｌとの関数であ
る。外気温度Ｔo が低いほど、また配管距離Ｌが長いほ
ど配管からの放熱が大きいからである。外気温度Ｔo と
配管距離Ｌとの種々の値に対するＫ2 の値がコントロー
ラ５０のＲＯＭにテーブルとして記憶されている。外気
温度Ｔo が５℃又は３０℃であるときのＫ2 の値を図３
のグラフに示す。外気温度Ｔo は外気温センサ９により
測定され、配管距離Ｌ及び循環流量Ｒは後述する手順で
計算される。尚、水の比熱が１（kcal／（度・リットル））
であるからこれを掛ければ、（３）式の左辺の単位は
（kcal）となる。Here, K2 is the heat radiation temperature drop (degree) of the pipe during reheating, and R is the circulating flow rate of the pipe (liter / min).
Represents K2 is a function of the outside air temperature To and the pipe distance L. This is because the lower the outside air temperature To and the longer the piping distance L, the greater the heat radiation from the piping. Values of K2 for various values of the outside air temperature To and the piping distance L are stored in the ROM of the controller 50 as a table. Figure 3 shows the value of K2 when the outside air temperature To is 5 ℃ or 30 ℃.
Is shown in the graph. The outside air temperature To is measured by the outside air temperature sensor 9, and the pipe distance L and the circulation flow rate R are calculated by the procedure described later. The specific heat of water is 1 (kcal / (degrees / liter))
Therefore, if this is multiplied, the unit on the left side of equation (3) becomes (kcal).
【００２９】循環時の配管放熱Ｗ2 は、（４）式により
計算される。 Ｗ2 ＝ Ｋ3 ×Ｒ×ｔ2 （４） ここで、Ｋ3 は循環時における配管の放熱温度降下
（度）、ｔ2 は前記Ｓ１０の循環時間（分）である。Ｋ
3 は、前記Ｋ2 と同様に外気温度Ｔo と配管距離Ｌとの
関数である。外気温度Ｔo と配管距離Ｌとの種々の値に
対するＫ3 の値がコントローラ５０のＲＯＭにテーブル
として記憶されている。外気温度Ｔo が５℃又は３０℃
であるときのＫ3 の値を図４のグラフに示す。外気温度
Ｔo 及び配管距離Ｌが等しいとき、Ｋ3 の値はＫ2 の値
より小さい。バーナ１２を通過した直後の大きな放熱が
ないからである。尚、水の比熱が１（kcal／（度・リット
ル））であるからこれを掛ければ、（４）式の左辺の単
位は（kcal）となる。The heat radiation W2 from the pipe during circulation is calculated by the equation (4). W2 = K3 * R * t2 (4) Here, K3 is the heat radiation temperature drop (degrees) of the pipe during circulation, and t2 is the circulation time (minutes) of S10. K
Similarly to K2, 3 is a function of the outside air temperature To and the pipe distance L. Values of K3 for various values of the outside air temperature To and the piping distance L are stored in the ROM of the controller 50 as a table. Outside temperature To is 5 ℃ or 30 ℃
The value of K3 is shown in the graph of FIG. When the outside air temperature To is equal to the piping distance L, the value of K3 is smaller than the value of K2. This is because there is no great heat radiation immediately after passing through the burner 12. Since the specific heat of water is 1 (kcal / (degrees / liter)), multiplying this gives the unit on the left side of equation (4) is (kcal).
【００３０】続いて、配管放熱Ｗ1 、Ｗ2 の算出に必要
な循環流量Ｒと配管距離Ｌとの導出について説明する。
循環流量Ｒは、循環ポンプ１５の出力と配管の流路抵抗
とにより定まる。循環ポンプ１５の出力はポンプの機種
ごとに既知の値であるが、配管の流路抵抗は主として配
管距離Ｌにより定まり、配管距離Ｌは浴室の構造や風呂
釜の配置等の違いにより個別に異なる。そこで本ルーチ
ンでは、追い焚きの加熱による湯温上昇値から循環流量
Ｒを算出し、その算出値から配管距離Ｌを求める。Next, the derivation of the circulation flow rate R and the piping distance L necessary for calculating the piping heat radiation W1 and W2 will be described.
The circulation flow rate R is determined by the output of the circulation pump 15 and the flow path resistance of the pipe. The output of the circulation pump 15 is a known value for each pump model, but the flow path resistance of the pipe is mainly determined by the pipe distance L, and the pipe distance L individually differs depending on the structure of the bathroom, the arrangement of the bathtub, and the like. . Therefore, in this routine, the circulation flow rate R is calculated from the hot water temperature rise value due to the additional heating, and the pipe distance L is obtained from the calculated value.
【００３１】循環流量Ｒは、（５）式により計算され
る。 Ｒ ＝ ＯＵＴ／（θ2 −θ1 ） （５） ここで、ＯＵＴはバーナ１２の出力を表す係数であっ
て、単位は（（度・リットル）／分）であり、コントローラ
５０のＲＯＭに予め記憶されている。θ1 、θ2は前記
Ｓ９で測定された、バーナ１２への戻り湯温（サーミス
タ１８）、バーナ１２からの往き湯温（サーミスタ１
９）である。即ち（５）式は、バーナ１２の出力が一定
であっても流量が大きければ湯温の上昇が小さいことを
考慮し、これから逆算して流量を求めるものである。The circulation flow rate R is calculated by the equation (5). R = OUT / ([theta] 2- [theta] 1) (5) Here, OUT is a coefficient representing the output of the burner 12, and its unit is ((degrees / liter) / min) and is stored in the ROM of the controller 50 in advance. ing. θ1 and θ2 are the return hot water temperature to the burner 12 (thermistor 18) and the hot hot water temperature from the burner 12 (thermistor 1) measured in S9.
9). That is, the equation (5) is to calculate the flow rate by back calculation from the fact that the rise in the hot water temperature is small if the flow rate is large even if the output of the burner 12 is constant.
【００３２】そして、配管距離Ｌは循環流量Ｒと図５の
グラフに示すように概略反比例の関係にあり、循環流量
Ｒの各値ごとの配管距離Ｌがコントローラ５０のＲＯＭ
に予めテーブルとして記憶されている。従って、（５）
式に基づき循環流量Ｒが算出されていれば、図５のグラ
フにより配管距離Ｌも求められる。かくして循環流量Ｒ
及び配管距離Ｌが求められ、これにより前記の配管放熱
Ｗ1 、Ｗ2 が求められる。The piping distance L and the circulation flow rate R are in a substantially inversely proportional relationship as shown in the graph of FIG. 5, and the piping distance L for each value of the circulation flow rate R is the ROM of the controller 50.
Is stored in advance as a table. Therefore, (5)
If the circulation flow rate R is calculated based on the equation, the piping distance L can also be obtained from the graph of FIG. Thus the circulation flow rate R
And the pipe distance L are obtained, and thus the pipe heat radiations W1 and W2 are obtained.
【００３３】（１）式のＸ（湯の上昇温度）は、（６）
式により計算される。 Ｘ ＝ Ｔ2 −Ｔ1 （６） ここで、Ｔ1 は前記Ｓ８で測定した初期温度であり、Ｔ
2 は前記Ｓ１１で測定した追い焚き及び循環後の温度で
ある。X (the rising temperature of the hot water) in the equation (1) is (6)
Calculated by the formula. X = T2-T1 (6) where T1 is the initial temperature measured in S8 and T
2 is the temperature after reheating and circulation measured in S11.
【００３４】（１）式のＹ（浴槽からの放熱による湯の
温度降下）は、（７）式により計算される。 Ｙ ＝ Ｋ1 ×（ｔ1 ＋ｔ2 ） （７） ここで、Ｋ1 は浴槽２からの放熱による湯の温度降下率
（度／分）であり、外気温度Ｔo の関数である。種々の
外気温度Ｔo に対するＫ1 の値がコントローラ５０のＲ
ＯＭにテーブルとして記憶されている。Ｋ1 の値は、外
気温度Ｔo が低いほど大きい。浴槽の放熱による湯の温
度降下の様子を図６のグラフに示す。浴槽の放熱は、バ
ーナ１２で加熱が行われているか否かによっては殆ど影
響されないので、追い焚き時間ｔ1 と循環時間ｔ2 との
合計にＫ1 を掛けることによりＹを求めることができ
る。以上により（１）式のＺ、Ｗ、Ｘ、Ｙがすべて求め
られ、浴槽内の湯量Ｑが計算される。この後、前記した
Ｓ１３以降の給湯等が行われる。Y in the equation (1) (temperature drop of hot water due to heat radiation from the bathtub) is calculated by the equation (7). Y = K1 × (t1 + t2) (7) Here, K1 is the temperature drop rate (degrees / minute) of hot water due to heat radiation from the bathtub 2, and is a function of the outside air temperature To. The value of K1 for various outside air temperatures To is R of the controller 50.
It is stored as a table in the OM. The value of K1 increases as the outside air temperature To decreases. The manner in which the temperature of the hot water drops due to heat dissipation from the bathtub is shown in the graph of FIG. Since the heat radiation of the bath is hardly affected by whether or not the burner 12 is heating, Y can be obtained by multiplying the sum of the reheating time t1 and the circulation time t2 by K1. From the above, all of Z, W, X and Y in the equation (1) are obtained, and the hot water amount Q in the bathtub is calculated. Thereafter, hot water supply and the like after S13 described above are performed.
【００３５】以上詳細に説明したとおり本実施例の給湯
器付風呂釜では、浴槽内の湯量Ｑの算出に当たり、外気
温度Ｔo の影響を大きく受ける配管や浴槽からの放熱を
考慮して浴槽内の湯量Ｑを算出し、不足ある場合には不
足分を自動的に給湯する。このため、季節にかかわらず
浴槽内の湯量Ｑの算出が高精度になされ過不足のない適
切な給湯・追い焚きがなされるものである。以上、実施
例について本発明を説明したが、本発明は上記実施例に
何ら限定されるものではなく、本発明の趣旨を逸脱しな
い範囲で種々の変形改良が可能であることは容易に推察
できるものである。例えば、本実施例では外気温を検出
するセンサ９を用いたが、入水温を検出する温度センサ
で兼用させて簡略化してもよい。As described above in detail, in the bathtub with a water heater of this embodiment, when calculating the amount Q of hot water in the bathtub, the heat radiation from the pipe or the bathtub greatly affected by the outside air temperature To is taken into consideration in the bathtub. The hot water amount Q is calculated, and if there is a shortage, the shortage is automatically supplied. Therefore, regardless of the season, the amount of hot water Q in the bathtub can be calculated with high accuracy, and proper hot water supply / reheating can be performed without excess or deficiency. The present invention has been described above with reference to the embodiments, but the present invention is not limited to the above embodiments, and it can be easily inferred that various modifications and improvements can be made without departing from the spirit of the present invention. It is a thing. For example, although the sensor 9 for detecting the outside air temperature is used in the present embodiment, the temperature sensor for detecting the incoming water temperature may be used in common for simplification.
【００３６】[0036]
【発明の効果】以上説明したことから明かなように、本
発明の給湯器付風呂釜によれば、浴槽内の湯量の算出を
浴槽・配管からの放熱があることを考慮して行うことと
したので、外気温度の高低の影響を受けずに高精度に浴
槽内の湯量の算出を行い、季節にかかわらず年中過不足
のない適切な給湯・追い焚きをすることができるもので
ある。As is apparent from the above description, according to the bath tub with the water heater of the present invention, the amount of hot water in the bathtub is calculated in consideration of the heat radiation from the bathtub / pipe. Therefore, the amount of hot water in the bathtub can be calculated with high accuracy without being affected by the change in the outside air temperature, and appropriate hot water supply and reheating can be performed regardless of the season regardless of the season.
【図１】給湯器付風呂釜の構成を示す図面である。FIG. 1 is a drawing showing a configuration of a bath kettle with a water heater.
【図２】給湯器付風呂釜における浴槽内の湯制御ルーチ
ンを示すフローチャートである。FIG. 2 is a flowchart showing a hot water control routine in the bathtub of the bath with a water heater.
【図３】追い焚き時における配管温度降下（Ｋ2 ）を示
すグラフである。FIG. 3 is a graph showing a pipe temperature drop (K2) during reheating.
【図４】循環時における配管温度降下（Ｋ3 ）を示すグ
ラフである。FIG. 4 is a graph showing a pipe temperature drop (K3) during circulation.
【図５】配管距離と循環流量との関係を示すグラフであ
る。FIG. 5 is a graph showing the relationship between piping distance and circulation flow rate.
【図６】浴槽温度降下（Ｋ1 ）を示すグラフである。FIG. 6 is a graph showing a bath temperature drop (K1).
１ 給湯器付風呂釜 ２ 浴槽 ９ 外気温センサ １０ 循環加熱部 １４ 水流スイッチ １５ 循環ポンプ １８ サーミスタ １９ サーミスタ ３０ 給湯器部 ５０ コントローラ 1 Bathtub with water heater 2 Bathtub 9 Outside air temperature sensor 10 Circulation heating part 14 Water flow switch 15 Circulation pump 18 Thermistor 19 Thermistor 30 Water heater part 50 Controller
Claims (3)
の湯を循環加熱する循環加熱手段と、浴槽内の湯温を検
知する湯温検知手段と、湯温検知手段が検知した湯温に
基づいて前記循環加熱手段を制御する加熱制御手段とを
有する給湯器付風呂釜において、 浴槽内の湯の有無を判断する湯有無判断手段と、 外気温度等の影響による放熱量を演算する放熱量演算手
段と、 前記放熱量を考慮して浴槽内の湯量を算出する湯量演算
手段と、 湯量演算手段の算出結果に基づき前記給湯手段により不
足湯量を自動的に足し湯する給湯指令手段とを有するこ
とを特徴とする給湯器付風呂釜。1. A hot water supply means for supplying hot water to a bathtub, a circulation heating means for circulatingly heating hot water in the bathtub, a hot water temperature detecting means for detecting hot water temperature in the bathtub, and hot water detected by the hot water temperature detecting means. In a bathtub with a water heater having heating control means for controlling the circulation heating means based on temperature, there is a hot water presence / absence determining means for determining the presence / absence of hot water in the bathtub and a heat radiation amount due to the influence of the outside air temperature and the like. A heat radiation amount calculation means, a hot water amount calculation means for calculating the hot water amount in the bathtub in consideration of the heat radiation amount, and a hot water supply command means for automatically adding the shortage hot water amount by the hot water supply means based on the calculation result of the hot water amount calculation means. A bath kettle with a water heater.
段の循環配管からの配管放熱量及び／又は浴槽からの浴
槽放熱量を演算するものであって、前記配管放熱量はあ
る温度まで浴槽内の湯を循環加熱したとき及び／又は一
定時間浴槽内の湯を循環したときの循環流量と外気温度
と循環加熱時間及び循環時間とにより演算されるもので
あり、前記浴槽放熱量は外気温度と経過時間とにより演
算されるものであることを特徴とする請求項１に記載す
る給湯器付風呂釜。2. The heat radiation amount calculation means calculates a pipe heat radiation amount from a circulation pipe of the circulation heating means and / or a bath heat radiation amount from a bathtub, and the pipe heat radiation amount is a bath temperature up to a certain temperature. When the hot water inside is circulated and heated and / or when the hot water inside the bath is circulated for a certain period of time, it is calculated by the circulation flow rate, the outside air temperature, the circulation heating time and the circulation time, and the bath heat radiation amount is the outside air temperature. The bath cooker with a water heater according to claim 1, wherein the bath cooker is calculated by the following formula:
熱時間、Ｗは循環配管からの配管放熱量、Ｙは浴槽から
の放熱による温度降下、Ｔ2 −Ｔ1 は循環加熱の温度上
昇）なる式により浴槽内の湯量Ｑを算出するものである
ことを特徴とする請求項２に記載する給湯器付風呂釜。3. The amount of hot water calculating means is Q = (IP × η × t1 −W) / (Y + T2 −T1) (IP is a gas input amount, η is thermal efficiency, t1 is a circulation heating time, and W is a circulation pipe. The amount of hot water in the bathtub is calculated by the equation: Y is the heat radiation amount from the pipe, Y is the temperature drop due to heat radiation from the bathtub, and T2-T1 is the temperature rise due to circulation heating. Bath pot with water heater.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP05269631A JP3091808B2 (en) | 1993-09-30 | 1993-09-30 | Bath kettle with water heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP05269631A JP3091808B2 (en) | 1993-09-30 | 1993-09-30 | Bath kettle with water heater |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07103573A true JPH07103573A (en) | 1995-04-18 |
| JP3091808B2 JP3091808B2 (en) | 2000-09-25 |
Family
ID=17475045
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP05269631A Expired - Fee Related JP3091808B2 (en) | 1993-09-30 | 1993-09-30 | Bath kettle with water heater |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3091808B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010196961A (en) * | 2009-02-25 | 2010-09-09 | Noritz Corp | Heating control device |
-
1993
- 1993-09-30 JP JP05269631A patent/JP3091808B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010196961A (en) * | 2009-02-25 | 2010-09-09 | Noritz Corp | Heating control device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3091808B2 (en) | 2000-09-25 |
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