JPS6341765A - Bath device - Google Patents

Abstract

PURPOSE:To enable simultaneous operation of a bath boiler from the initial state of the starting of operation of a hot water feeder, by a method wherein the delivery port of the hot water feeder and the bath tub suction port of a forced circulation passage are positioned facing each other so that feed hot water from the hot water feeder is delivered in the form of jet streams to the bath tub suction port of the forced circulation passage. CONSTITUTION:A delivery port (c) of a hot water feed passage 3A for a bath and a suction port (d) of a circulation passage 8A on the suction side are positioned facing each other in a horizontal direction, extending at right angles with the hole axis of an upper hole (a), so that hot water delivered from a hot water feed passage 3A for a bath is delevered to a circulation passage 8A on the suction side at the interior of the upper hole (a) in association with the feed pressure of a hot water feeder 1 and the suction pressure of a circulating pump 9. When a bath tub 4 is filled with hot water having a proper temperature through operation of both the hot water feeder 1 and a bath boiler 7, hot water fed from the hot water feeder 1 is delivered, in the upper hole (a), to the circulation passage 8A on the suction side, and after the feed hot water is further heated by means of the bath boiler 7, it is delivered and fed to the bath tub 4 through a lower hole (b) by means of a circulation passage 8B on the delivery side,. This constitution enables simultaneous operation of the bath boiler 7 from the initial stage of the starting of the hot water feeder 1, and enables high-efficient filling of the bath tub with hot water having a proper temperature through operation of both the hot water feeder 1 and the bath boiler 7.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention provides a system for circulating hot water in a bathtub by operating a bathtub and supplying hot water directly to the bathtub by operating a water heater. Regarding the bath equipment, in detail, a water heater that connects a bathtub and a bath pot with a forced circulation path with a circulation pump, heats tap water, and supplies hot water produced by the heating at tap pressure. , relates to a bath device connected to the lower part of the bathtub via a hot water supply path provided with a vacuum break valve at a higher location than the bathtub.

[Conventional technology]

Conventionally, in the above bath equipment, both the bath pot and the water heater were operated to efficiently fill the bathtub with hot water at an appropriate temperature (in winter, when the temperature of the tap water was low and the water heater's capacity was insufficient) In case of emergency, etc.), connect the hot water supply line from the water heater directly to the forced circulation line connecting the bathtub and the bathtub, and then recycle the hot water supplied from the water heater to the bathtub. By supplying hot water to the bathtub after heating, the bathtub can be operated simultaneously from the start of operation of the water heater without having to wait until the hot water has accumulated in the bathtub to a level higher than the forced circulation bathtub-side suction port. , it was possible to fill the bathtub with hot water at an appropriate temperature faster and with higher efficiency by operating both the water heater and the bathtub (see, for example, Japanese Patent Application Laid-Open No. 60-202253).

[Problem that the invention seeks to solve]

However, in the type where the hot water supply line from the water heater is directly connected to the forced circulation line for the bathtub, the vacuum breaker valve attached to the hot water supply line and the circulation pump installed in the forced circulation line are connected to the pipe system. Because it is connected directly, there is a risk that the pump pressure of the circulation pump may have an adverse effect on the vacuum breaker valve, causing trouble in its operation. Although various shutoff valve devices such as check valves and solenoid valves are installed to switch flow paths and prevent backflow, vacuum breaker valves are sometimes required due to operational troubles caused by pump pressure. If the system did not operate properly, there was a risk that hot water from the bathtub would backflow into the water supply, which could lead to a serious contamination accident.

In other words, a vacuum breaker valve attached to the hot water supply path from the water heater at a location higher than the bathtub automatically opens the hot water supply path to the atmosphere when negative pressure is generated in the hot water supply path due to a water outage, etc. This prevents the backflow of hot water from the bathtub to the water supply side due to the siphon phenomenon caused by the generation of negative pressure. In comparison, backflow prevention when negative pressure is generated is more reliable, and by attaching this vacuum breaker valve to the hot water supply line, it is possible to connect the water supply system directly to the bottom of the bathtub (water supply, water heater, hot water supply line, etc.) for the first time.
However, if the vacuum breaker valve is at risk of causing operational troubles due to the influence of pump pressure as mentioned above, the vacuum breaker valve inherently has high reliability. The reality was that the chain structure could not be fully utilized and safety could not be ensured in terms of hygiene.

An object of the present invention is to make it possible to operate the bathtub at the same time from the start of operation of the water heater, while not impairing the backflow prevention function of the vacuum breaker valve, through rational improvements to the pipe configuration. It is in.

[Means for solving problems]

The bath apparatus according to the present invention has a hot water supply system that connects a bathtub and a bath pot with a forced circulation path equipped with a circulation pump, and that heats tap water and supplies hot water produced by the heating at tap pressure. In a configuration in which a vessel is connected to the lower part of the bathtub via a hot water supply path provided with a vacuum break valve at a higher place than the bathtub, the hot water supply path is connected inside the bathtub or in a restricted space communicating therewith. The discharge port and the bathtub-side suction port of the forced circulation path are connected to the bathtub-side suction port of the forced circulation path by cooperating with the supply pressure from the water heater and the suction pressure of the circulation pump to connect the hot water supplied from the water heater to the bathtub side suction port of the forced circulation path. The reason is that they are arranged opposite each other so that they are delivered in a fountain-like manner, and their functions and effects are as follows.

[For production]

In other words, when the water heater and bath pot are operated at the same time, the hot water supplied from the water heater is delivered in a fountain-like manner from the outlet of the hot water supply path to the bathtub-side suction port of the forced circulation path, and then the hot water is forcedly circulated through the delivery point. The water is supplied to the bathtub via the suction side conduit of the channel and reheated in the bathtub, and then supplied to the bathtub via the discharge side conduit of the forced circulation channel.

Therefore, without waiting for hot water to accumulate in the bathtub itself to a level higher than the bathtub-side suction port of the forced circulation path, hot water is directly supplied from the water heater to the bath pot, and the bath pot can be turned on and off at the same time from the beginning of operation of the water heater. I can drive.

In addition, to prevent backflow using a vacuum breaker valve, an air release system is installed between the outlet of the hot water supply path and the bathtub-side suction port of the forced circulation path, which are opposed to each other inside the bathtub or in a restricted space communicating with the bathtub. Because of this, the pump pressure of the circulation pump installed in the forced circulation path does not affect the vacuum break valve attached to the hot water supply path at all, and the hot water supply path that opens directly to the bathtub has no effect on the vacuum break valve attached to the hot water supply path. It is equipped with a vacuum breaker valve.
The vacuum breaker valve can function under the most appropriate installation conditions for the vacuum breaker valve, and the highly reliable backflow prevention function inherent in the vacuum breaker valve can be fully utilized.

〔Effect of the invention〕

As a result of the above, the water heater can operate both the water heater and the bath pot to fill the bathtub with water at an appropriate temperature, while providing extremely high safety against contamination accidents such as backflow of water from the bathtub groove to the water supply side. By starting the operation of the bathtubs at the same time, we can quickly and efficiently operate the bathtubs, making it convenient and easy to use.

Although it is a complication, it is possible to operate both the water heater and the bath pot without waiting for the hot water to accumulate in the bathtub to a level higher than the bathtub-side suction port of the forced circulation path, and the water supply side of the bathtub groove can be operated. If the only goal is to reliably prevent backflow to the bathtub, as shown in Fig. The forced circulation path (8) on the bath pot (7) side is
It is also possible to connect to A), but in that case, try to use the water supply pressure as the hot water supply pressure to forcibly supply hot water from the water heater to the bathtub without using a separate hot water pump etc. if,
The intermediate tank (T) is installed in the bathtub (4) to ensure a hydrostatic head.
It becomes necessary to place it at a much higher place than the conventional tank (same type as the so-called di-stern tank type), and as a result, the pipe equipment becomes larger ((V) in the figure is a three-way switching valve for switching the flow path. ).

On this point, the model that attaches the vacuum breaker valve to the water supply line from the water heater can prevent backflow and utilize the water pressure as described above, as long as the vacuum breaker valve is placed a little higher than the highest water level in the bathtub. Therefore, the bath equipment according to the present invention has the inherent advantage of being able to make the pipe equipment more compact.Therefore, the bath equipment according to the present invention has an extremely high reliability in preventing backflow in the bathtub groove, while also improving the operation of the water heater. In addition to the above-mentioned characteristic effect of ``allowing us to fill hot water at an appropriate temperature with high efficiency by operating the bath kettle from our facility,'' we also have a vacuum breaker valve that allows compact pipe equipment to use water pressure as the pressure for supplying hot water. Overall, it is a highly practical bath device that is excellent in terms of hygiene, safety, ease of use, ease of installation, ease of construction, and equipment cost.

In addition, as a device having the same function as the bath device of the present invention, a reservoir for receiving hot water supplied from a water heater is provided in the bathtub, and the bathtub-side suction port of the forced Wi loop is opened to the reservoir, thereby making the water heater When operating a bathtub and a bathtub at the same time, the hot water supplied from the water heater is first received by a reservoir attached to the bathtub.
The received hot water is supplied to the bathtub via the suction side pipe of the forced circulation path, and after being reheated in the bathtub, it is supplied to the bathtub via the discharge side pipe of the forced circulation path. A method was previously proposed (Japanese Patent Application No. 58-130416), but compared to that method, the present invention has the advantage of eliminating the need for a reservoir structure and making the structure attached to the bathtub more compact.

〔Example〕

Next, embodiments of the present invention will be described based on the drawings.

Figure 1 shows the overall configuration of the bath equipment, and (1) in the figure is a water heater that heats the water supplied from the water supply channel (2) connected to the water supply and supplies the heated water at water pressure. Its main components are a fin-tube type water heating heat exchanger (IA) and a gas burner (IB) for it.
).

A hot water supply path (3) from the water heater (1) is a bath hot water supply path (3A) that connects to the lower part of the bathtub (4), and a general hot water supply path (3B) that connects to a hot water tap (5) for general hot water supply. The water heater (1) can be used to supply hot water to the bathtub (4) and for general hot water supply.

The hot water supply path for the bath (3^) has a bathtub (4) along 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. By installing a vacuum breaker valve (6) that opens to the atmosphere, the automatic atmosphere release function of the vacuum breaker valve (6) ensures that the bath water will not unexpectedly flow back to the water supply side due to a siphon phenomenon caused by the generation of negative pressure. This is to ensure hygiene and safety.

(7) in the figure is a fin-tube type water heating heat exchanger (
7A) and a gas burner (7B) for it, the bathtub (7) and the bathtub (4) are connected to a suction side circulation path (8A) and a discharge side circulation path (8B). In addition, a circulation pump (9) is interposed in the suction side circulation path (8A).

Hot water supply path for bath (3A) and circulation path (8A), (8B
) to the bathtub (4), a through hole is formed in the lower part of the bathtub wall, and a pipe connector (10) is attached to the through hole.
) for bath hot water supply path (3A) and circulation path (8A)
, (8B) are centrally connected.

The specific structure of the conduit connector (10) is a connecting member (IOA) in which an upper hole (a) and a lower hole (b) are formed vertically in parallel, as shown in FIGS. 2 to 4. 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,
The bath hot water supply path (3A) and the blow-in side circulation path (8A) are connected to the upper hole (a), and the discharge side circulation path (8B) is connected to the lower hole (b). are respectively connected to connecting members (IOA).

The outlet (c) of the bath water supply path (3A) and the suction side circulation path (
The suction port (d) of 8A) means that the hot water discharged from the hot water supply path for the bath (3A) is caused by the cooperation between the supply pressure (water pressure) of the water heater (1) and the suction pressure of the circulation pump (9). The upper hole (
They are arranged opposite to each other in the horizontal direction perpendicular to the hole axis in a), so that both the water heater (1) and the bath pot (7) can be operated to fill the bathtub (4) with hot water at an appropriate temperature. If so, bathtub (4)
As shown in Fig. 5 (a), hot water is supplied from the water heater (1) to the suction side circulation path (8A) inside the upper hole (a), and then After further heating the hot water in the bath pot (7), the discharge side circulation path (8
The water is discharged and supplied from the lower hole (b) to the bathtub (4) via the hole (B).

In other words, the hot water is transferred inside the upper hole (a) to the water heater (
By supplying the hot water from 1) to the bath pot (7), after the water heater (1) starts operating, the bath pot (7)
The bathtub (
4) Without waiting for hot water to accumulate in the water heater (1
) has been designed so that it can be operated in parallel with the bath kettle (7) from the start of operation, making it possible to operate both the water heater (1) and the bath kettle (7) to efficiently fill the water at the appropriate temperature. 〈It has been made possible to implement it.

In addition, when supplying hot water from the water heater (1) to the bath pot (7),
The inside of the bathtub, called the internal space of the upper hole (a), is located between the bath water supply path (3^) equipped with a vacuum break valve (6) and the suction side circulation path (8A) equipped with a circulation pump (9). Circulation pump (9)
This is to prevent the pump pressure from having an adverse effect on the vacuum breaker valve (6) that could cause operational trouble.

In addition, when operating only the water heater (1) to fill the bathtub (4) with hot water, in that case, the circulation pump (
9) is stopped, the hot water supplied from the bath hot water supply path (3A) to the inside of the upper hole (a) is directly from the upper hole (a), as shown in Figure 5 (rl). bathtub (
4).

In addition, when only the bath pot (7) is operated to circulate and heat the bath water, the bath water is circulated from the upper hole (a) to the suction side, as shown in Figure 5 (c). Circulation path (8A
), and the hot water heated in the bath pot (7) flows from the lower hole (b) through the discharge side circulation path (8B) to the bathtub (
4).

Regarding the ancillary structure of the pipe connector (10), the upper hole (a
) is a mounting hole for a bathtub water level sensor (11), which will be described later.

In addition, on the inside of the bathtub (4), an elbow member (IOc) provided with an orbiting blade (IOB) and a bathtub water attraction hole (e) is connected to each of the upper hole (a) and the lower hole (b). The hot water discharged from the upper hole (a) or the lower hole (b) is swirled by the action of the swirling blade (10B), and the bathtub water is drawn through the bathtub water attraction hole (e) with the swirling. The mixture is sufficiently mixed with the water and then discharged into the bathtub (4).

Note that when only the bathtub (7) is operated to circulate and heat bathtub water, the internal flow path of the elbow member (IOC) connected to the upper hole (a) becomes a bathtub water suction path.

The cosmetic cover (100) is formed with a porous opening (f) for introducing bathtub water into the bathtub water attraction hole (e) of each elbow member (IOc), and the porous opening (f
) to both hot tub water induction holes (e) is provided with an installation space for a bathtub water temperature sensor (12), which will be described later.

On the other hand, regarding the operation control of this bath equipment, the water heater (1
) and the bath pot (7), and is equipped with an automatic hot water filling mode that automatically increases the bath water to a set water level and automatically raises the temperature to the set temperature. Reheating mode that circulates and heats up the temperature, as well as hot water tap (5
) is configured to cause the control device (13) to execute a general hot water supply mode for supplying hot water at a set temperature to each of the hot water supply systems (13).

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. It is equipped with display devices to display the operating status of each part and the setting status of various values.

As 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 for the bath (3A) and the hot water supply path for the general use (3B); 3A)
is equipped with a hot water filling valve (16), and in the fuel gas supply line (17) for the water heater (1) and bath pot (7), the amount of heating is controlled by the gas burner (IB) of the water heater (1). A gas amount adjustment valve (18) for adjustment, and a gas valve (19) for intermittent gas supply for the gas burner (7B) of the bath pot (7).
Furthermore, 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) on the upstream side of the branch point between the hot water supply channel for baths (3A) and the hot water supply channel for general use (3B). A hot water temperature sensor (23) is installed in the hot water supply path (3) of The passage (8B) is equipped with a second water flow switch (25) that is turned ON when water flow is generated by driving the circulation pump (9), and the bathtub water level sensor (11) and bathtub water temperature sensor (12) are connected to the pipes as described above. It is installed in the bathtub (4) while being housed in the path connector (10).

The bathtub water level sensor (11) specifically detects the static head pressure of the bathtub water, and based on the detection of the static head pressure, the bathtub water level is read steplessly in the control device (13).

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 main gas valve (20) and gas volume adjustment valve (18) are opened based on the water supply start detection by the water volume sensor (21), and the gas burner (IB) of the water heater (1) is opened.
is automatically ignited.

The water flow adjustment valve (15) normally adjusts the water supply ff1v per unit time to the maximum rated water supply volume v for this bath device.
It is fixed to be maintained at max.

The water level lip and temperature tp of the bathtub water desired by the user are set by the water level setting device and the hot water temperature setting device, and the bathtub water level sensor (
11), the water level 11x and temperature tx of the remaining water in the bathtub detected by the bathtub water temperature sensor (12), and the inlet water temperature ti detected by the inlet water temperature sensor (22), the required heating amount per unit time. q is calculated using the following formula (a).

Then, the rated heating amount qa-max of the water heater (1), the rated heating amount q b-IIIax of the bath pot (7), and the rated heating amount q max ( −q aomax + q b−m
ax) and the calculated required heating 1 tq, and as a result of the comparison, (i) The calculated required heating amount q is the rated heating it of the water heater (1)
When q a-IIIax or less (q≦qa-wax)
In this case, the heating amount qa of the water heater (1) per unit time is calculated by automatic adjustment to the gas volume adjustment valve (18) while the bath pot (7) and the circulation pump (9) are maintained in a stopped state. The required heating amount is adjusted to q, and the water heater (1
) starts filling the bathtub (4) with hot water in the hot water supply form shown in FIG. 5(b).

(11) The calculated required heating amount q is the rated heating of the water heater (1)'
l q larger than a-wax and less than the rated heating iLqmax of the entire bath equipment (qa-max
x<Q≦q wax (= q a-max +q b-
wax)), the circulation pump (9) is started following the ignition of the gas burner (IB) on the water heater side, and the second water flow switch (25) is turned on with the start of the circulation pump (9). The gas valve (19) is opened and the bathtub (7) is opened.
) gas burner (7B) is automatically ignited.

Furthermore, when the gas valve (19), which is an 0N-OFF valve, is opened, the bath pot (7) is heated with its rated heating amount qb-IIIax, whereas the rated heating f of the bath pot (7) is
The water heater (1) is heated so that the sum of q b-1ax and the heating amount qa of the water heater (1) becomes the calculated required heating amount q (qb-max + qa = q).
The heating amount qa of is adjusted by automatic adjustment to the gas amount adjustment valve (18), thereby changing the water supply lv to the rated water supply volume v w
By operating both the water heater (1) and the bathtub (7) while the bathtub (4) is fixed to the ax, filling of the bathtub (4) with hot water starts as shown in FIG. 5(A).

In other words, the above equation (A) is expressed as follows: There is no residual water in the bathtub (4).
IIX = 0), as well as filling the bathtub (4)
Even when filling hot water from a state where there is residual water in the bathtub, the water supply time and heating required to increase the bath water to the set water level IIp 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 water supply time equal to and the heating amount q per unit time of the bath equipment as a whole (heating amount ff1qa of the water heater (1) and heating amount qb of the bath pot (7)
The time required from the start of hot water filling to the completion of hot water filling is minimized by adjusting the sum of the above equation (a) to a value that satisfies equation (a).

(iii) When the calculated required heating amount q is larger than the rated heating 1q l1ax of the entire bath equipment (q >
q max (-q a-max + q b-max))
In this case, as in the case (ii) above, the circulation pump (9) is started following the ignition of the gas burner (IB) on the water heater side, and the gas valve (19) is opened to open the bath pot (7). The gas burner (7B) is automatically ignited.

Also, the bath pot (7) has its rated heating amount q b-Illax
In addition to heating the water heater (1) at its rated heating amount qa-max, the water heater (1) automatically adjusts the gas amount adjustment valve (18) so that the water heater (1) also heats at its rated heating amount qa-max.
The heating amount qa of 1) is adjusted, and the water amount sensor (2) is further adjusted.
While feeding back the amount of water detected in step 1), the amount of water supplied per unit time V is automatically adjusted to the water amount adjustment valve (15) to a value that satisfies the following formula (c). Its rated heating amount q wax (= q a-
wax + q blax), and the water supply amount V
With the throttle adjusted, both the water heater (1) and the bathtub (7) are operated to start filling the bathtub (4) with hot water in the hot water supply form as shown in FIG. 5(A).

In other words, in the case of (iii), automatic hot water filling in the form of (ii) above is required in winter because the water inlet temperature ti is quite low or there is a large amount of low-temperature water remaining in the bathtub (4). This is a case where the heating capacity of the bath equipment is insufficient to carry out the operation, but the above-mentioned formula (c) can be used not only to fill the bathtub (4) with hot water from a state where there is no remaining water (lIx = o), but also to fill the bathtub ( 4) Even when filling hot water from a state where there is residual water, the bathtub water is increased to the set water level Hp and heated at the rated heating amount q max (= q a-max + q b-wax). This is a conditional expression that makes the heating time and water supply time required to raise the temperature to the set temperature tp equal to (ii
In case i), the hot water filling method is to start water supply and heating at the same time with the heating amount q of the bath equipment as a whole fixed at its rated heating 'Mk q raax, and to set the water supply amount per unit time V By adjusting the value to a value that satisfies the above-mentioned formula (c), 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 forms (i), (ii), and (iii) above, the water level fi of the bathtub water remains unchanged.
x, temperature tx, and water inlet temperature ti are continuously detected, and the required heating is calculated based on the detected values during the filling process. q
is sequentially calculated by the above equation (a).

Then, at any point during the hot water filling, (iv) the calculated required heating amount q is equal to the rated heating amount qa-wa of the water heater (1).
When x or less (q≦q a-wax), the above (i)
After adopting the same hot water filling configuration as above, the heating amount q of the water heater (1)
a is readjusted to the calculated required heating amount q, and (v) the calculated required heating amount q is the rated heating ff of the water heater (1).
When it is larger than iqa-max and less than or equal to the rated heating amount qn+ax of the entire bath equipment (qa-IIl
ax<q ≦ q max (= q a・taax
+ q b-wax)), the same hot water filling form as in (ii) above is adopted, and the rated heating amount q b- + wax of the bath pot (7) and the heating 1 tqa of the water heater (1) are calculated. Sum calculation required heating! q (qb-max+qa=
q) When the heating amount qa of the water heater (1) is readjusted, and (vi) when the calculated required heating amount q is larger than the rated heating amount q + wax of the entire bath equipment (q > qa-w
ax + qb-max)), the above (iii)
After adopting the same hot water filling form as above, the water supply amount ■ is as described above (c) for the detected values Hx, tx, and ti at the point in time.
It is readjusted to a value that satisfies the formula, and automatic hot water filling continues while such readjustments are performed one after another.

In other words, the above equations (a) and (8) both represent the water level Hx
Since it is a functional formula for For example, 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. Accordingly, a control error occurs due to a change in the cross-sectional area, and as a result, the automatic hot water filling completion state deviates from the desired hot water filling completion state previously set by the user.

In addition, even if the water level Hx of the remaining water at the time of starting automatic filling is lower than the installation height of the bathtub water level sensor (11), and the remaining water cannot be detected at the time of starting automatic filling, formula (A) or ( C) If only the heating! l adjustment and water supply amount adjustment based on the equation are executed at the start of hot water filling, automatic hot water filling will also be completed due to control errors caused by missed detection of low water level residual water at the start of automatic hot water filling. The state deviates from the desired state.

Therefore, as mentioned above, by sequentially executing readjustments based on formula (a) or formula (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.

The formula used as the standard for adjusting the heating amount and water supply amount is the water level fi.
By giving the function equations (() and (c) for , the control configuration can be used in common for bathtubs (4) of any shape and capacity, and changes in the specifications of bathtubs (4) can be easily dealt with both in terms of manufacturing and cost. There is.

Regarding the completion of automatic hot water filling, when the water level fix of the bathtub water reaches the set water level Hp after successive readjustments during hot water filling, the gas amount adjustment valve (18) is activated based on the bathtub water level detected by the bathtub water level sensor (11). The water supply valve (16) is closed, and the operation of the water heater (1) is stopped.

Then, when the water filling up to the set water level of 11p is finally completed with the independent operation of the water heater (1), the bathtub water temperature sensor (1
2) If the detected bathtub water temperature tx has not yet reached the set temperature tp, after the water heater (1) stops operating, the circulation pump (9) and bath pot (7) start operating, and the detected bathtub water temperature The operation is continued until Lx reaches the set temperature tp.

Also, when the water is filled up to the set water level Hp, the water heater (1)
When the operation of both the bathtub and the bathtub (7) is completed, if the detected bathtub water temperature tx at the time of stopping the water heater operation based on the water level detection has reached the set temperature tp, the circulation pump (9) is activated. At the same time, the gas valve (
19) and the main gas valve (20) are closed and the bath kettle (7)
The operation of the water heater (1) is also stopped, but the detected bathtub water temperature tx at the time the water heater operation is stopped based on water level detection.
If the temperature has not reached the set temperature tp, the circulation pump (9) and the bathtub (7) continue to operate even after the water heater (1) is stopped until the detected bathtub water temperature tx reaches the set temperature tp.

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 temperature Lx does not reach the set temperature tp even though the bathtub water level Hx has reached the set water level LIP. The insufficient temperature rise caused by heat radiation is automatically compensated for by operating the bathtub after stopping the operation of the water heater 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.

Even after the bathtub water level Hx reaches the set water level Hp and the operation of the water heater (1) is stopped, and the bathtub water temperature tx reaches the set temperature tp and the operation of the circulation pump (9) and bath pot (7) is stopped. , unless an operation to stop the automatic hot water filling mode is performed on the remote controller (14) side, the bathtub water temperature tx is checked every set time of about 10 minutes, for example, and the detected bathtub water temperature tx is set as the confirmation result. temperature tp
If the difference exceeds the set tolerance of about 1°C, for example, the circulation pump (9) and the bathtub (7) are automatically restarted until the detected bathtub water temperature tx returns to the set temperature tp. The operation will continue.

B. Reheating mode When the reheating mode is started, the circulation pump (9)
When the circulation pump is started, the second water flow switch (25) is turned on, and the main gas valve (20) and the gas valve (19) are opened to open the gas burner (7B) of the bath pot (7). is automatically ignited, and the circulating heating of the bathtub water by operating the bathtub pot (7) in the bathtub water circulation mode as shown in FIG. 5(c) is started.

However, at this time, the bathtub water level Hx is insufficient and the pipe connector (1
0), the second water flow switch (25) is not ON even when the circulation pump (9) is driven, so the bathtub (7) is not operated, thereby preventing so-called dry heating. .

In addition, the second water flow switch (
25) is also ONL, when the bathtub water temperature tx detected by the bathtub water temperature sensor (12) exceeds a set upper limit temperature set to, for example, about 50°C, the operation of the bathtub (7) is automatically stopped. This prevents overboiling.

When the reheating mode is stopped, the circulation pump (9)
At the same time, the gas valve (19) and the main gas valve (20) are closed based on the turning off of the second water flow switch (25) due to the stopping of the circulation pump, and the operation of the bath pot (7) is stopped. Ru.

C0 general hot water supply mode When the hot water tap (5) is opened, the first water flow switch (24) is accordingly turned on, and the main gas valve (2o) and gas amount adjustment valve (18) are opened and the water heater is turned on. The gas burner (IB) in (1) is automatically ignited.

In addition, the set temperature tr is set based on the temperature tr set by the user using a temperature setting tool for general hot water supply, the incoming water temperature ti detected by the human water temperature sensor (22), and the supplied water 'Nv detected by the water flow sensor (21). The amount of heating q゛ required to obtain hot water is calculated, and the gas amount adjustment valve (
18) The heating amount q of the water heater (1) is automatically adjusted to
a is adjusted to the calculated required heating amount q゛, and furthermore, based on the detection information of the hot water supply temperature sensor (23), the gas amount adjustment valve (18) is also adjusted to maintain the detected hot water supply temperature trx at the set temperature tr. The heating amount qa of the water heater (1) is finely adjusted by automatic adjustment, and hot water is supplied to the hot water tap (5) while the hot water temperature is stabilized by so-called feedforward, AND, and feedback control. .

When the hot water tap (5) is closed, the first water flow switch (24) is turned off, and the source gas valve (20) and gas amount adjustment valve (18) are closed, and the water heater (1) is turned off. Operation will be stopped.

In addition, -a hot water supply mode and reheating mode are respectively hot water supply 2K.
Since this mode is executed with the independent operation of (1) and the independent operation of the bathtub (7), simultaneous parallel execution is possible.

Furthermore, when the hot water tap (5) is opened during execution of the automatic hot water filling mode, a portion 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. General hot water supply is performed in this mode, but at this time, automatic hot water filling mode is set to water heater (
1) and the bath pot (7), the amount of hot water supplied from the water heater (1) to the bath pot (7) may be insufficient, so the circulation pump (
9) and the bath kettle (7) are temporarily stopped based on the ON of the first water flow switch (24) until the hot water tap (5) is closed.

[Another example]

Next, another embodiment of the present invention will be described.

The restricted space (the upper hole (a )) Instead of facing each other in the bathtub (4), as shown in FIG. 6, they may be faced inside the bathtub (4).

In addition, in FIG. 6, (26) in the figure is a decorative cover.

The facing direction between the discharge port (c) of the hot water supply path (3A) and the bathtub side suction port (d) of the forced circulation path (8A) may be horizontal or vertical, or may be arranged as appropriate. It may be in an inclined direction.

Water heater (1), bath pot (7), and circulation pump (9)
The operational control form and the control configuration thereof can be changed in various configurations, and are not limited to the operational control form disclosed in the above-mentioned embodiment.

The vacuum breaker valve (6) attached to the hot water supply path (3A) from the water heater (1) can be of various conventionally known types.

[Brief explanation of the drawing]

1 to 5 show embodiments of the present invention, FIG. 1 is an overall configuration diagram, FIG. 2 is an enlarged cross-sectional view of a pipe connector, and FIG. 3 is a cross-sectional view taken along line mm in FIG. 2. 4 are schematic perspective views of the pipe connector, and FIG. FIG. 7 is a partially omitted enlarged view showing an embodiment. FIG. 7 is a configuration diagram showing a comparative example. (1) Water heater, (3A) Water supply path, ( 4)...Bathtub, (6)...Vacuum break valve, (7)...Bath pot, (8A), (
8B)... Forced circulation path, (9)... Circulation pump, (a)... Restricted space section, (c)...
...Discharge port, (d) ...Bathtub side suction port.

Claims (1)

[Claims] The bathtub (4) and the bath pot (7) are connected by forced circulation paths (8A) and (8B) interposed with a circulation pump (9), and the tap water is heated and the hot water produced by the heating is maintained at tap pressure. A bath device in which a water heater (1) that supplies hot water with water is connected to the lower part of the bathtub (4) via a hot water supply path (3A) equipped with a vacuum break valve (6) at a higher location than the bathtub (4). In the inside of the bathtub (4) or in the restricted space (a) communicating therewith, the outlet (c) of the hot water supply path (3A) and the forced circulation paths (8A) and (8B) are connected to each other. Bathtub side suction port (d
) and the hot water supplied from the water heater (1) to the water heater (1).
The forced circulation paths (8A) and (8B) are arranged so as to face each other so as to be delivered to the bathtub side suction ports (d) in a fountain flow by the cooperation of the supply pressure from the circulation pump (9) and the suction pressure of the circulation pump (9). Bath equipment.