JPH042862B2 - - Google Patents

Description

[Detailed description of the invention]

[Industrial Application Field] Regarding the bath device of the present invention, in detail, it includes a means for supplying water to the bathtub, a heating means for adjusting the temperature of the bathtub water, a water level detection means for detecting the water level in the bathtub, and a means for supplying water to the bathtub. The water level detecting means and the temperature detecting means are respectively provided to detect temperature, and the water level detecting means and the temperature detecting means are configured to increase the bath water from a state where there is residual water in the bathtub to a set water level Hp and to raise the temperature to a set temperature tp. The present invention relates to an improvement of a bath device equipped with a control device that automatically controls the water supply means and the heating means based on information detected by the means. [Prior art] The above-mentioned bath equipment can be roughly divided into 6 types.
As shown in the figure, a water heater type in which the heating means adjusts the temperature of the bath water by heating the water supplied by the water supply means during the supply process to the bathtub, and mixing the heated supply water with the bath water. and the seventh
As shown in the figure, there is a bathtub type in which the heating means directly heats the bathtub water, but conventionally, the bathtub water is automatically increased from the state where there is water left in the bathtub to the set water level Hp, and In order to automatically raise the temperature to the set temperature tp, in water heater type, the heating amount q per unit time of the heating means is set to the rated heating amount qmax.
The water supply amount v per unit time of the water supply means is throttled and adjusted while the water supply means is fixed at Execute the warm process first, then change the water supply amount v to the rated water supply amount.
Either adjust the heating amount q while it is fixed at vmax and execute a water increase process in which heated water at the set temperature tp is continuously supplied to the bathtub until the detected bathtub water level Hx by the water level detection means reaches the set water level Hp; , the above-mentioned temperature raising step is performed after the water increasing step is performed. In addition, in the bathtub type, water is supplied to the bathtub with the water supply amount v per unit time of the water supply means fixed at the rated water supply amount vmax until the detected bathtub water level Hx by the water level detection means reaches the set water level Hp. After that, the bathtub water is heated with the heating amount per unit time of the heating means fixed at the rated heating amount Vmax until the bathtub water temperature tx detected by the temperature detection means reaches the set temperature tp. Ta. In other words, regardless of the type of water heater or bath pot, by completing either one of raising the water to the set water level Hp and raising the temperature to the set temperature tp, the remaining water (residual hot water) ) and the water level and temperature, which are two uncertain factors that differ each time the bath equipment starts operating (I cannot provide any references). [Problems to be Solved by the Invention] However, in the conventional configuration as described above, it takes a long time to fill the bathtub until the water level reaches the set water level Hp and the temperature reaches the set temperature tp, making operation difficult. Although it has been automated, it is still inconvenient due to the long waiting time from the start of operation to the completion of hot water filling. An object of the present invention is to minimize the time required from the start of operation to the completion of hot water filling by rationally dealing with the two uncertain factors of residual water level and temperature. [Means for Solving the Problems] The bath apparatus according to the present invention is characterized by a water supply means to the bathtub, a heating means for adjusting the temperature of the bathtub water, a water level detection means for detecting the water level of the bathtub, and Each of the water level detecting means is provided with a temperature detecting means for detecting the temperature of the bathtub water, and the water level detecting means is configured to increase the bathtub water from a state where there is residual water in the bathtub to a set water level Hp and to raise the temperature to a set temperature tp. and a control device that automatically controls the water supply means and the heating means based on information detected by the temperature detection means, wherein the heating means heats the water supplied by the water supply means in the process of supplying the water to the bathtub. The control device comprises a first heating section that adjusts the temperature of the bathtub water by mixing the heated supply water and the bathwater, and a second heating section that directly heats the bathwater. Based on a hot water filling start command, water supply by the water supply means and heating by the heating means are started almost simultaneously with the water supply amount v per unit time of the water supply means being fixed at the rated water supply amount vmax of the water supply means, and the heating amount q of the heating means per unit time.
The following formula (a) q=(Hp・tp−Hx・tx/Hp−Hx−ti) for the water level Hx and temperature tx of the remaining water in the bathtub detected by the water level detection means and temperature detection means.・vmax - (A) However, ti: Calculated based on the inlet water temperature of the water supply means, and the sum of the heating amounts per unit time of the first heating section and the second heating section is the calculated heating amount q. Thus, the heating amount of each of the first heating section and the second heating section is adjusted, and its functions and effects are as follows. [Function] Normally, this type of bath equipment has a hot water filling operation in which the water in the bathtub is increased to a set water level from a state where there is no residual water in the bathtub or a state in which there is residual water, and the temperature is raised to a set temperature. There is a reheating operation in which the temperature is raised to the set temperature while the water level is at the set level. In the present invention, the heating means includes a first heating section that adjusts the temperature of the bath water by heating the water supplied by the water supply means during the process of supplying the water to the bathtub, and mixing the heated supply water with the bath water. , and a second heating section that directly heats the bath water, and in each of the hot water filling operation and reheating operation, the first heating section and the second heating section
Each heating section is used efficiently. That is, during reheating operation, only the second heating section is operated to avoid wasteful water supply by the water supply means when the first heating section is operated, and during hot water filling operation, the amount of water supplied is With the amount of water fixed at the rated water supply amount of the water supply means, the first heating section and the second heating section cooperate to heat the water, thereby minimizing the time required for filling the hot water. The effects during hot water filling operation will be explained below. In other words, with respect to the water level Hx and temperature tx of the remaining water detected by the water level detection means and temperature detection means,
The required water supply amount V and the required heating amount Q required to increase the bathtub water to the set water level Hp and raise the temperature to the set temperature tp are given by the following equations (a) and (b). V=(Hp-Hx)・S −(a) Q={Hp・tp−Hx・tx−(Hp −Hx)・ti}・S −(b) However, ti: Water inlet temperature of water supply means S: Bathtub Base area Assuming that the time required to replenish the required water supply amount V and the time required to replenish the required heating amount Q are equal,
The ratio between the water supply amount v per unit time and the heating amount q per unit time is given by the following equation (c) based on the above equations (a) and (b). q/v=Q/V=Hp・tp−Hx・tx/Hp−Hx−ti −(c) Then, if the water supply amount v per unit time is fixed to the rated water supply amount vmax of the water supply means, the above ( By transforming equation c), the following equation (a) is given regarding the amount of heating q per unit time. q=(Hp・tp−Hx・tx/Hp−Hx−ti)・vmax −(a) Therefore, with the water supply amount v per unit time fixed at the rated water supply amount vmax of the water supply means, Water supply and heating by the heating means are started at the same time, and the sum q of the heating amount per unit time of each of the first heating section and the second heating section is the water level of the remaining water detected by the water level detection means and the temperature detection means.
If the heating amount of the first heating section and the second heating section is adjusted so that Hx and temperature tx have values that satisfy equation (a) above, the water supply will be the maximum water supply amount for the bath device. Since water is supplied at the rated water supply amount vmax, the time required to increase the water to the set water level Hp is the shortest, and when the water increase to the set water level Hp is completed, the temperature rise to the set temperature tp is calculated to be completed at the same time. As a result, the time required from the start of operation to the completion of hot water filling becomes the shortest for the bath apparatus. By the way, in the conventional water heater model (see Figure 6), with the heating amount q fixed at the rated heating amount qmax, the water supply amount v is throttled and adjusted to detect high-temperature water of 90°C and the bathtub water level tx is set at the set temperature tp First, a temperature raising step is carried out to continuously supply water to the bathtub until the water level reaches In the case where the water increasing process is executed in which water is continuously supplied to the bathtub until Hx reaches the set water level Hp, the time T ₁ required for the temperature increasing process is given by the following equation (d). Set the bathtub water temperature tx by adding 90℃ high-temperature water to the temperature tp
The required high temperature water volume V ₁ when
From the relationship 90V ₁ = tp(Hx・S+V ₁ ), V ₁ = (tp−tx)/(90−tp)・Hx・S −(k) The required heat amount Q ₁ is the difference between 90℃ and water temperature ti and high temperature water volume
The product with V ₁ , Q ₁ = (90-ti) V ₁ - (l) The time T ₁ required for the temperature increase process at the rated heating amount qmax is T ₁ = Q ₁ /qmax - (m) Therefore, ( From equations k), (l), and (m), T ₁ = (tp−tx)・(90−ti)/(90−tp)・qmax・
Hx・S−(d) Moreover, the time T ₂ required for the water increase process is given by the following equation (e). The amount of heated water V ₂ required to reach the set water level Hp by adding heated water at the set temperature tp is V ₂ = Hp・S−Hx・S−V ₁ −(n) From equation (1), V ₁ = Q ₁ /90 −ti −(o) From equation (m), Q ₁ =T ₁・qmax −(p) From equations (n), (o), and (p), V ₂ = (Hp−Hx)S−qmax/90− ti・T ₁ − (q) The time T ₂ required for the water increase process at the rated water supply amount vmax is T ₂ = V ₂ /vmax − (r) Therefore, by substituting equation (q) into equation (r), , T ₂ ={(Hp−Hx)・S −qmax/90−ti・T ₁ }・1/Vmax −(e) The overall required time T for filling the hot water is given by the following equation (f). T = T ₁ + T ₂ - (f) In addition, in the conventional bathtub type (see Figure 7), water supply to the bathtub is detected with the water supply amount v fixed at the rated water supply amount vmax, and the bathtub water level Hx is the set water level. HP
, and then heating the bathtub water with the heating amount q fixed at the rated heating amount qmax until the detected bathtub water temperature tx reaches the set temperature tp, the time required for the water supply process T ₃ , the time required for the heating process T ₄ , and the overall hot water filling time T are calculated using the following formula (g) for the residual water level Hx and temperature tx, respectively:
(h), given by (i). T ₃ = (Hp-Hx)・S/vmax −(g) T ₄ =Hp・tp−Hx・tx−(Hp−Hx)・ti/qmax・S −(h) T=T ₃ +T ₄ −( i) On the other hand, in the bath device according to the present invention, the temperature rise to the set temperature tp is completed at the same time as the water rise to the set water level Hp is completed, so the overall time required for filling the hot water T is Water level Hx and temperature
It is given by the following equation (j) for tx. T=(Hp・Hx)・S/vmax −(j) As an example, the required hot water filling time for each model is calculated using the above formulas (d) to (j) under the conditions shown in Table 1. Comparing T, results as shown in Table 2 are obtained.

【table】

〔Effect of the invention〕

As is clear from the above, by adopting the configuration of the present invention, it is possible to increase the amount of water required to fill the bathtub from a state where there is residual water in the bathtub to the set water level and to raise the temperature to the set temperature. In other words, the waiting time from the start of operation to the completion of hot water filling can be greatly shortened compared to previous models, and together with the automation of hot water filling operation, the bath system can be made extremely convenient for users. Ta. [Example] Next, an example of the present invention will be described based on the drawings. Figure 1 shows the overall configuration of the bath equipment.
is a water heater that serves as a first heating section that heats the water supplied from the water supply channel 2 connected to the water supply and supplies the heated water with water pressure. It is equipped with a heating heat exchanger 1A and a gas burner 1B for it. A hot water supply path 3 from the water heater 1 includes a hot water supply path 3A for the bath connected to the lower part of the bathtub 4 and a hot water tap 5 for general hot water supply.
It is branched into general hot water supply path 3B which connects to
A water heater 1 is used to supply hot water to a bathtub 4 and for general hot water supply. The hot water supply path 3A for the bath is connected to the bathtub 4 on the way.
The pipes are installed at a higher place than the above, and the highest part of the pipe is equipped with a system that automatically closes the pipe at the highest point when negative pressure occurs in the pipe due to a water outage, etc. A vacuum breaker valve 6 that opens to the atmosphere is installed, and the automatic atmosphere release function of the vacuum breaker valve 6 reliably prevents unexpected backflow of bath water to the water supply side due to a siphon phenomenon caused by the generation of negative pressure. In this way, hygiene and safety are ensured. In the figure, 7 is a bathtub as a second heating section whose main components are a finch tube type water heating heat exchanger 7A and a gas burner 7B for it, and the bathtub 7 and the bathtub 4 are connected to a suction side circulation path. 8A and a discharge side circulation path 8B, and a circulation pump 9 is interposed in the suction side circulation path 8A. The connection structure of the bath hot water supply path 3A and the circulation paths 8A and 8B to the bathtub 4 is such that a through hole is formed in the lower part of the bathtub wall, and the bath hot water supply path 3A and the circulation path 8B are connected to the pipe connector 10 attached to the through hole. Each of the circulation paths 8A and 8B is centrally connected. Regarding the specific structure of the pipe connector 10, as shown in FIGS. 2 to 4, there are an upper hole a and a lower hole b.
10A of connecting members formed vertically in a parallel position.
is attached to the outside of the bathtub wall with its upper hole a and lower hole b facing the inside of the bathtub through the through hole in the bathtub wall, and the bath hot water supply path 3A and the suction side circulation path 8 are installed.
A is connected to the connecting member 10A so as to communicate with the upper hole a, and the discharge side circulation path 8B is connected with the lower hole b. Discharge port c of hot water supply path 3A for bath and suction side circulation path 8
The suction port d of A means that the hot water discharged from the bath hot water supply path 3A is connected to the supply pressure (water pressure) of the water heater 1 and the circulation pump 9.
are arranged opposite to each other in the horizontal direction orthogonal to the hole axis of the upper hole a so that the suction pressure is transferred to the suction side circulation path 8A inside the upper hole a,
When both the water heater 1 and the bath pot 7 are operated to fill the bathtub 4 with hot water at an appropriate temperature, the hot water supply form to the bathtub 4 is as shown in FIG. 5A.
The hot water supplied from the water heater 1 is delivered to the suction side circulation path 8A inside the upper hole a, and after the delivered hot water is further heated in the bath pot 7, it is sent from the lower hole b to the bathtub via the discharge side circulation path 8B. 4 is discharged and supplied. In other words, by supplying hot water from the water heater 1 to the bath pot 7 by transferring hot water inside the upper hole a, after the water heater 1 starts operating, the bath pot 7
The bathtub 7 can be operated in parallel from the start of operation of the water heater 1 without having to wait for hot water to accumulate in the bathtub 4 itself to a water level at which circulating water can be supplied to the bathtub. Both the water heater 1 and the bath pot 7 are operated to efficiently fill the water at an appropriate temperature. In addition, when supplying hot water from the water heater 1 to the bath pot 7,
Between the bath hot water supply path 3A equipped with the vacuum break valve 6 and the suction side circulation path 8A equipped with the circulation pump 9,
The circulation pump 9
This is to prevent the pump pressure from having an adverse effect on the vacuum breaker valve 6, which may cause operational trouble. In addition, when operating only the water heater 1 to fill hot water into the bathtub 4, since the circulation pump 9 is stopped in that case, as shown in FIG. Hot water supplied from the hot water supply path 3A to the inside of the upper hole a is directly discharged and supplied to the bathtub 4 from the upper hole a. In addition, the bathtub water circulation mode when only the bathtub pot 7 is operated to circulate and heat the bathtub water is as shown in FIG. The hot water heated in the bath pot 7 is discharged from the lower hole b to the bathtub 4 via the discharge side circulation path 8B. Regarding the ancillary structure of the pipe connector 10, the inner part of the upper hole a is used as a hole for attaching a bathtub water level sensor 11, which will be described later. Further, on the inside side of the bathtub 4, a swirler 10B and an elbow member 10C provided with a bathtub water attraction hole e are connected to the upper hole a and the lower hole b, respectively, so that the upper hole a or the lower hole b is connected to the elbow member 10C. The discharged hot water is swirled by the action of the swirling blades 10B, and as the hot water is swirled, it is sufficiently mixed with the bathtub water drawn through the bathtub water attraction hole e and is discharged into the bathtub 4. In addition, when only the bath pot 7 is operated to circulate and heat the bath water, the elbow member 10C connected to the upper hole a
The internal flow path serves as the bathtub water suction path. The cosmetic cover 10D is formed with a porous opening f for introducing bathtub water into the bathtub water induction hole e of each elbow member 10C, and from the porous opening f, both bathtub water induction holes e are formed. A space for installing a bathtub water temperature sensor 12, which will be described later, is provided in the bathtub water flow path leading to the bathtub water flow path. On the other hand, regarding the operation control of this bath device, a control device 13 that automatically controls the water heater 1 and the bath pot 7
is installed to automatically increase the water in the bathtub to the set water level.
In addition, an automatic hot water filling mode that automatically raises the temperature to a set temperature, a reheating mode that circulates and heats the bath water to raise the temperature, and a general hot water supply mode that supplies hot water at the set temperature to the hot water tap 5. The control device 13 is configured to execute the following. The remote controller 14 that gives operation commands to the control device 13 is equipped with various operating tools such as a mode switching tool that also serves as a start/stop tool for each mode, a hot water temperature setting tool, etc., and also controls the operation of each part. It is equipped with display devices to display the status and setting status of various values. As for the automatic valves, in the hot water supply path 3, a water flow regulating valve 15 is installed upstream of the branch point between the hot water supply path 3A for the bath and the hot water supply path 3B for the general use, and
In addition, in the fuel gas supply path 17 for the water heater 1 and the bath pot 7, a gas amount adjustment valve 18 for adjusting the amount of heating is installed for the gas burner 1B of the water heater 1. For the gas burner 7B of No. 7, a gas valve 19 for intermittent gas supply is provided;
A source gas valve 20 is installed on the upstream side of the branch point between the water heater side and the bathtub side. In addition, as sensors, a water flow sensor 21 and an incoming water temperature sensor 22 are installed in the water supply channel 2, and a hot water temperature sensor 23 is installed in the hot water supply channel 3 on the upstream side of the branch point between the bath water supply channel 3A and the general hot water supply channel 3B. , due to the generation of water flow in the general hot water supply path 3B due to the opening of the hot water tap 5.
The first water flow switch 24 to be turned on is turned on when a water flow is generated in the discharge side circulation path 8B due to the drive of the circulation pump 9.
The bathtub 4 is equipped with a second water flow switch 25, and a bathtub water level sensor 11 and a bathtub water temperature sensor 12 housed in the pipe connector 10 as described above. The bathtub water level sensor 11 specifically detects the static head pressure of the bathtub water, and the bathtub water level is continuously read by the control device 13 based on the detection of the static head pressure. Next, the execution form of each mode by the control device 13 will be listed. A Automatic hot water filling mode When the automatic hot water filling mode is started, the hot water filling valve 16 is opened and the water flow sensor 21 is opened.
Based on the detection of the start of water supply, the source gas valve 20 and the gas amount adjustment valve 18 are opened, and the gas burner 1B of the water heater 1 is automatically ignited. The water amount adjustment valve 15 is normally fixed in a state in which the water supply amount v per unit time is maintained at the maximum rated water supply amount vmax for this bath device. The water level Hp and temperature tp of the bathtub water desired by the user set by the water level setting tool and the hot water setting tool, the water level Hx and temperature tx of the remaining water in the bathtub detected by the bathtub water level sensor 11 and the bathtub water temperature sensor 12,
In addition, for the inlet water temperature ti detected by the inlet water temperature sensor 22, the required heating amount q per unit time is expressed by the following formula (a) q = (Hp・tp−Hx・tx/Hp−Hx−ti)・vmax - Calculated by (a). Then, the rated heating amount qa・max of water heater 1,
The rated heating amount qb・max of the bath pot 7, and the rated heating amount qmax (=qa・max+qp・max) of the bath equipment as a whole, which is the sum of these rated heating amounts.
The calculated required heating amount q is compared with the calculated required heating amount q, and as a result of the comparison, () When the calculated required heating amount q is less than the rated heating amount qa・max of the water heater 1 (q≦qa・max), the bath is While the pot 7 and the circulation pump 9 are maintained in a stopped state, the heating amount qa of the water heater 1 per unit time is adjusted to the calculated required heating amount q by automatic adjustment to the gas amount adjustment valve 18, and then the water supply starts. The amount v is the rated water supply amount
With the vmax fixed at vmax, the water heater 1 is operated independently to start filling the bathtub 4 with hot water in the hot water supply form as shown in FIG. 5B. () When the calculated required heating amount q is larger than the rated heating amount qa・max of water heater 1 and less than the rated heating amount qmax of the entire bath equipment (qa・max<q≦qmax(=qa・max+qb・
max)), the circulation pump 9 is started following the ignition of the gas burner 1B on the water heater side, and the gas valve 19 is opened based on the turning on of the second water flow switch 25 accompanying the start of the circulation pump 9. , the gas burner 7B of the bathtub 7 is automatically ignited. Furthermore, when the gas valve 19, which is an ON-OFF valve, is opened, the bath pot 7 is heated with the rated heating amount qb・max, whereas the rated heating amount qb・max of the bath pot 7 and the water heater 1 are The sum of the heating amount qa and the calculated required heating amount q (qb・max
+qa=q), the heating amount qa of the water heater 1 is adjusted by automatic adjustment to the gas amount adjustment valve 18, and the water supply amount v is set to the rated water supply amount.
Water heater 1 and bath pot 7 are fixed at vmax.
By both operations, filling of the bathtub 4 with hot water starts in the hot water supply form as shown in FIG. 5A. In other words, the above equation (A) not only fills the bathtub 4 with hot water from a state where there is no remaining water (Hx = 0), but also
Even when filling the bathtub 4 with water remaining, the water supply time required to increase the bathtub water to the set water level Hp by supplying water at the rated water supply amount vmax and to raise the temperature to the set temperature tp. This is a conditional expression that makes the heating time equal to are started at the same time, and the heating amount q (the sum of the heating amount qa of the water heater 1 and the heating amount qb of the bath pot 7) per unit time for the bath equipment as a whole is set to a value that satisfies the above formula (a). By adjusting
The time required from the start of hot water filling to the completion of hot water filling is minimized. () When the calculated required heating amount q is larger than the rated heating amount qmax of the entire bath equipment (q>
At qmax (=qa・max+qb・max)), as in the case () above, following the ignition of the gas burner 1B on the water heater side, the circulation pump 9 is started and the gas valve 19 is opened to open the bathtub. 7 gas burner 7B is automatically ignited. In addition, bath pot 7 has its rated heating amount qb・max
In addition to heating operation with water heater 1
The heating amount qa of the water heater 1 is adjusted by automatic adjustment to the gas amount adjustment valve 18 so that the water heater 1 is heated with its rated heating amount qa・max. The water supply amount v at each point is automatically adjusted to the water amount adjustment valve 15 using the following formula (c) 1/v=(Hp・tp−Hx・tx/Hp−Hx−ti)・1/qm
It is adjusted to a value that satisfies ax −(c), and then the heating amount q of the bath equipment as a whole is equal to its rated heating amount.
Fixed at qmax (=qa・max+qb・max),
Then, with the water supply amount v being throttled and adjusted, both the water heater 1 and the bath pot 7 are operated to start filling the bathtub 4 with hot water in the hot water supply form as shown in FIG. 5A. In other words, in the case of (), in winter, because the inlet water temperature ti is quite low, or there is a large amount of low-temperature water remaining in the bathtub 4, automatic hot water filling in the form of () described above cannot be performed. This is a case where the heating capacity of the bath equipment is insufficient, but the above-mentioned equation (C) applies not only to filling the bathtub 4 with hot water from a state where there is no remaining water (Hx = 0), but also when there is water remaining in the bathtub 4. Even when filling hot water from
This is a conditional expression that equalizes the heating time required to raise the temperature to the set temperature tp by heating at (qb・max) and the water supply time. Water supply and heating are started simultaneously with the heating amount q fixed at the rated heating amount qmax,
And the water supply amount v per unit time is
By adjusting equation (c) to a value that satisfies the requirement, if the heating capacity is insufficient, the time required from the start of hot water filling to the completion of hot water filling can be shortened as much as possible depending on the situation. Even after automatic hot water filling is started in any of the above methods (), (), (), the water level of the bathtub water remains unchanged.
Hx, temperature tx, and water inlet temperature ti are continuously detected, and the required heating amount q is calculated sequentially from the detected values during the filling process using the above equation (A). Then, at any point during hot water filling, () When the calculated required heating amount q is less than the rated heating amount qa・max of the water heater 1 (q≦qa・max)
In this case, the heating amount qa of the water heater 1 is readjusted to the calculated required heating amount q after adopting the same hot water filling configuration as in () above, and () the calculated required heating amount q is the rated heating amount of the water heater 1. When it is larger than qa・max and less than the rated heating amount qmax of the entire bath equipment (qa・max<q≦qmax(=qa・max+qb・
max)), the rated heating amount qb・
The heating amount qa of the water heater 1 is readjusted so that the sum of max and the heating amount qa of the water heater 1 becomes the calculated required heating amount q (qb・max+qa=q), and () the calculated required heating amount q is When the rated heating amount qmax of the bath equipment as a whole is larger (q＞
For qa・max+qb・max), the same water filling configuration as in () above is adopted, and the water supply amount v is expressed by the above equation (c) for the detected values Hx, tx, and ti at the intermediate point in time. The water is readjusted to a satisfactory value, and automatic filling continues as such readjustments are carried out one after another. In other words, both equations (a) and (c) above are based on the water level.
Since it is a functional expression related to Hx, there is no particular problem in the case of a bathtub shape where the cross-sectional area of the bathtub water storage part is always equal to the bottom area, but the cross-sectional area of the bathtub water storage part becomes larger as the height of the bathtub increases. In the case of a bathtub shape that changes depending on the transverse height, it is not possible to adjust the heating amount and water supply amount based on formula (a) or (c) only at the start of filling. As the process progresses, a control error occurs due to a change in cross-sectional area, and as a result, the automatic filling completion state deviates from the desired filling completion state previously set by the user. Also, the remaining water level Hx at the start of automatic hot water filling
Even if the height is lower than the installation height of the bathtub water level sensor 11 and residual water cannot be detected when automatic hot water filling starts, the heating amount adjustment and water supply amount adjustment based on formula (a) or (c) can be performed. If only executed at the start, the completion state of automatic hot water filling will deviate from the desired state due to control errors caused by missed detection of low water level residual water at the start of automatic hot water filling. Therefore, as mentioned above, by sequentially executing readjustments based on formula (a) or (c) during automatic hot water filling, changes in the cross-sectional area of the bathtub and low water level residual water at the start of automatic hot water filling can be avoided. The control error caused by the detection is corrected so that the state of completion of automatic hot water filling matches the desired state with good accuracy. In addition, the equations used as standards for adjusting the heating amount and water supply amount are given by the functional equations (a) and (c) regarding the water level Hx, and
The control error caused by this is expressed by the function equations (a) and (c).
By re-adjusting the water during filling based on the
The control structure can be used in common for both bathtubs 4, and changes in the specifications of the bathtub 4 can be easily dealt with both in terms of production and cost. Regarding the completion of automatic hot water filling, when the water level Hx of the bathtub water reaches the set water level Hp after successive readjustments during hot water filling, the gas amount adjustment valve 18 is closed based on the bathtub water level detection by the bathtub water level sensor 11. At the same time, the hot water filling valve 16 is closed and the operation of the water heater 1 is stopped. When filling the water up to the set water level Hp is finally completed with independent operation of the water heater 1, the bathtub water temperature tx detected by the bathtub water temperature sensor 12 is detected at the time when the water heater operation is stopped based on the water level detection.
If the water heater 1 has not yet reached the set temperature tp, the circulation pump 9 and the bathtub 7 are started to operate after the water heater 1 is stopped, and the operation continues until the detected bathtub water temperature tx reaches the set temperature tp. Continued. In addition, if the filling of hot water to the set water level Hp is finally completed with the operation of both the water heater 1 and the bath pot 7, the detected bathtub water temperature at the time when the water heater operation is stopped based on the water level detection. If tx has reached the set temperature tp, the circulation pump 9 is stopped, and the second water flow switch 25 is turned OFF as the circulation pump is stopped, and the gas valve 19 and the source gas valve 20 are closed to close the bath. The operation of pot 7 is also done by water heater 1.
However, if the detected bathtub water temperature tx at the time of stopping the water heater based on water level detection has not reached the set temperature tp, the detected bathtub water temperature tx will remain at the set temperature tp even after the water heater 1 stops operating. The circulation pump 9 and the bathtub 7 continue to operate until the end. In other words, by starting water supply and heating at the same time, and adjusting the amount of heating and water supply based on formula (a) or formula (c) above, the water increase to the set water level Hp and the temperature increase to the set temperature tp are completed at the same time. However, due to heat dissipation during filling, a situation may occur where the bathtub water level tx still does not reach the set temperature tp even though the bathtub water level Hx has reached the set water level Hp. Therefore, the insufficient temperature rise caused by heat radiation is automatically compensated for by operating the bathtub after the water heater has stopped operating as described above. After the water heater operation is stopped based on water level detection, when the bathtub water temperature tx reaches the set temperature tp, the remote controller 14 notifies and displays the completion of hot water filling. When the bathtub water level Hx reaches the set water level Hp, water heater 1
The operation of the bathtub is stopped, and the bathtub water temperature tx is the set temperature.
Even after the operation of the circulation pump 9 and bath boiler 7 is stopped at tp, unless the automatic hot water filling mode is stopped on the remote controller 14 side, the bath water temperature tx will be changed every set period of about 10 minutes, for example. is executed, and if the difference between the detected bathtub water temperature tx and the set temperature tp exceeds a set allowable value of, for example, about 1°C, the circulation pump 9 and bath pot 7 are automatically restarted. The operation continues until the detected bathtub water temperature tx returns to the set temperature tp. B Reheating mode When the reheating mode is started, the circulation pump 9 is started, and the source gas valve 20 and gas valve 19 are opened based on the turning on of the second water flow switch 25 accompanying the start of the circulation pump. Then, the gas burner 7B of the bath pot 7 is automatically ignited, and the bath pot 7 is then heated in the bathtub water circulation mode as shown in FIG.
Circulation and heating of the bathtub water by the operation starts. However, at this time, if the bathtub water level Hx is insufficient and has not reached the pipe connector 10, the second water flow switch 25 is activated even by driving the circulation pump 9.
Since the bath pot 7 is not turned on, it is not operated, thereby preventing so-called dry heating. Furthermore, even if the second water flow switch 25 is turned on by driving the circulation pump 9, the bathtub water temperature sensor 12
When the detected bathtub water temperature tx exceeds a set upper limit temperature set to, for example, 50°C, the operation of the bathtub 7 is automatically stopped, thereby preventing overboiling. . When the reheating mode is stopped, the circulation pump 9 is stopped, and the second water flow switch 25 is turned OFF due to the circulation pump being stopped, and the gas valve 19 and the main gas valve 20 are closed, and the bath pot is turned off. 7 is stopped. C General hot water supply mode When the hot water tap 5 is opened, the main gas valve 20 and the gas amount adjustment valve 18 are opened based on the ON of the first water flow switch 24, and the gas burner 1B of the water heater 1 is automatically ignited. Ru. Also, for general hot water supply, hot water at a set temperature tr is generated based on the temperature tr set by the user with a temperature setting tool, the inlet water temperature ti detected by the inlet water temperature sensor 22, and the water supply amount v detected by the water flow sensor 21. The amount of heating q' required to obtain the required heating amount is calculated, and the amount of heating qa of the water heater 1 is adjusted by automatic adjustment to the gas amount adjustment valve 18 based on the calculated required amount of heating q'. Based on this, the heating amount qa of the water heater 1 is finely adjusted by automatically adjusting the gas amount regulating valve 18 so as to maintain the detected hot water temperature trx at the set temperature tr. , the hot water tap 5 is turned on while the hot water supply temperature is stabilized by feedback control.
Hot water is supplied to the When the tap 5 is closed, the main gas valve 20 is turned off based on the OFF of the first water flow switch 24.
Then, the gas amount adjustment valve 18 is closed and the operation of the water heater 1 is stopped. Furthermore, what is the general hot water supply mode and reheating mode?
Since this is a mode in which the water heater 1 is operated independently and the bathtub pot 7 is operated independently, simultaneous parallel execution is possible. Further, when the hot water tap 5 is opened during execution of the automatic hot water filling mode, general hot water supply is performed in a form in which a part of the hot water supplied from the water heater 1 to the bathtub 4 is diverted and supplied to the hot water tap 5 side. However, at this time, if the automatic hot water filling mode is being executed with both water heater 1 and bath pot 7 operating, there is a possibility that the amount of hot water supplied from water heater 1 to bath pot 7 will be insufficient. For this reason, the operation of the circulation pump 9 and the bathtub 7 is temporarily stopped based on the turning on of the first water flow switch 24 until the hot water tap 5 is closed. [Another Embodiment] Next, another embodiment of the present invention will be described. When the required heating amount q calculated by the above formula (A) becomes larger than the rated heating amount qmax of the heating means, the rated heating amount of the heating amount q is changed as in the above embodiment.
Instead of adjusting the water supply amount v to a value that satisfies the above equation (c) while fixing it to qmax, other control forms may be adopted, such as executing automatic hot water filling failure notification, for example. It may also be used as a configuration. In addition, as in the above embodiment, the water level Hx of the remaining water in the bathtub
The heating amount q of the heating means adjusted to satisfy equation (a) with respect to If the water level Hx and temperature tx of the bathtub water detected by the above equation (a) are readjusted to values that satisfy the equation (a), control errors can be effectively eliminated and the completed state of hot water filling can be achieved as desired. Although it is possible to match the setting state more accurately, the above-mentioned readjustment may be omitted in some cases. When installing both a water heater and a bath pot, when both are operated to fill hot water, if the hot water from the water heater is reheated in the bath pot and then supplied to the bathtub, the water level in the bathtub will be lower. At the very least, the bathtub can be operated, which is advantageous in shortening the heating time, but even when both the water heater and the bathtub are operated, hot water from the water heater is directly supplied to the bathtub, and It is also possible to adopt a configuration in which the bathtub water is circulated and heated in a bathtub. Various types of heating means can be used, such as instantaneous water heaters, circulating bath pots, and central heating boilers, and gaseous fuels and liquids can be used as energy sources. Various sources such as fuel or electricity can be used. Various improvements can be made to the specific detection configurations of the water level detection means and temperature detection means, as well as the attachment structure to the bathtub.

[Brief explanation of drawings]

1 to 5 show embodiments of the present invention,
Fig. 1 is an overall configuration diagram, Fig. 2 is an enlarged sectional view of the conduit connector, Fig. 3 is a sectional view taken along the - line in Fig. 2, Fig. 4 is a schematic perspective view of the conduit connector, and Fig. 5 A, B, and C are diagrams showing hot water supply forms, respectively.
FIG. 6 and FIG. 7 are diagrams showing the basic configuration of the bath device, respectively. 4...Bathtub, 11...Water level detection means, 12...
Temperature detection means, 13...control device.

Claims (1)

[Claims] 1. Water supply means to the bathtub 4, heating means for adjusting the temperature of the bathtub water, water level detection means 11 for detecting the bathtub water level, and temperature detection means 12 for detecting the temperature of the bathtub water. The bathtub water is increased from the state where there is residual water in the bathtub 4 to the set water level Hp,
The bath device also includes a control device 13 that automatically controls the water supply means and the heating means based on information detected by the water level detection means 11 and the temperature detection means 12 so as to raise the temperature to a set temperature tp,
A first heating unit 1 that adjusts the temperature of the bathtub water by heating the heating unit in the process of supplying the water supplied by the water supply unit to the bathtub 4, thereby mixing the heated supply water and the bathtub water. and a second heating unit 7 that directly heats bath water, and the control device 13 controls the water supply amount v per unit time of the water supply means based on the hot water filling start command. Water supply by the water supply means and heating by the heating means are started almost simultaneously with the rated water supply amount vmax being fixed, and the heating amount q of the heating means per unit time.
, the water level detection means 11 and the temperature detection means 12
Water level Hx and temperature tx of residual water in the bathtub detected by
The following formula (a) is used for Heating section 1
and the second heating section 7 so that the sum of the heating amounts per unit time becomes the calculated heating amount q.
A bath device that adjusts the heating amount of each of the heating section 1 and the second heating section 7. 2. The control device 13 adjusts the heating amount q of the heating means per unit time to the value calculated by the equation (A) based on the detected value of the water inlet temperature ti of the water supply means. A bath device according to scope 1. 3 The control device 13 controls the water level Hx of the remaining water in the bathtub.
The amount of heating q adjusted with respect to
3. The bath device according to claim 1, wherein the bath device is readjusted to a value that satisfies the equation (a) with respect to the temperature tx and the temperature tx.