JPH06337168A - Bath device - Google Patents

Abstract

PURPOSE:To provide a bath device, preventing the sudden reverse flow of water into a dropping hopper and the overflow of the water from the dropping hopper due to said reverse flow, at the time of stopping the supply of water. CONSTITUTION:A bath device is provided with a bathtub 1, a hot-water reserving type heating boiler body 2, a water sending pipe 3, a water returning pipe 4, a forced circulating pipe 5, a forced circulating pump 6, and a dropping pipe 7 and a dropping hopper 8, which are established from and connected to the hot-water reserving heating boiler body 2. In this case, the driving of the forced circulating pump 6 is started in accordance with the starting of water dropping utilizing the dropping hopper 8 while the driving of the forced circulating pump 6 is stopped with a specific delay time with respect to the stopping of water dropping utilizing the hopper 8.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a bath device.

[0002]

2. Description of the Related Art An example of a bath device will be described with reference to FIGS. FIG. 1 is a configuration diagram of a bath apparatus, and FIG. 4 is a timing chart of driving of related members when water is supplied to the bathtub. The bath device includes a bathtub 1, a hot-water storage heating can body 2 provided outside the bathtub 1, an outflow pipe 3 connecting a water passage from the bathtub 1 to the hot-water storage heating can body 2, and a hot-water storage heating can body. 2 to bath 1
To the return pipe 4 and a return pipe 4 for connecting a water passage, and a pipe 5 for forced circulation for sucking a part of the water that has entered the hot water storage heating can body 2 from the outflow pipe 3 and discharging it to the return pipe 4 side. And the tube 5
A forced circulation pump 6 disposed in the middle of the pipe, and a drop pipe 7 that is vertically installed and connected to the hot water storage heating can body 2.
And a drop hopper 8 provided on the upper end thereof. To reheat the bath water, the bath water sent from the bathtub 1 to the hot water storage heating can body 2 through the outflow pipe 3 is heated by the hot water storage heating can body 2 being heated by the burner 2a or the like, Further, it is carried out by circulating it to the bathtub 1 through the return pipe 4.

Reference numeral 9 is a controller which outputs a predetermined control command to the forced circulation pump and other members by inputting a command relating to the operation of the device and by inputting information from sensors of each part of the device. To do. The water supply operation to the bathtub 1 in this device will be described with reference to FIG. 4 as well.
When the water supply switch to the bathtub 1 (not shown) is turned on, the controller 9 opens the drop opening / closing valve for supplying water from a water source (not shown) to the hopper 8 and starts driving the forced circulation pump 6. . The water thus supplied enters the hot water storage type heating can body 2 from the dropping hopper 8 through the dropping pipe 7. By driving the forced circulation pump 6, part of the water that has entered the hot water storage heating can body 2 from the bathtub 1 through the outflow pipe 3 is sucked into the forced circulation pipe 5, and the forced circulation pipe 5 Return pipe 4 through the inside
It is ejected vigorously to the side. By the negative pressure generated by this, the water in the hot water storage heating can body 2 is drawn toward the return pipe 4, so that the bath water goes out, the hot water storage heating can body 2, the return pipe 4
Is forced to circulate through. By this forced circulation, the water in the dropping pipe 7 is also sucked and quickly dropped into the hot water storage heating can body 2. Further, the forced circulation causes the inside of the bath 1 to be agitated, and the temperature can be made uniform. Bathtub 1
When the water supply switch is turned off after the predetermined drop into the drop water, the drop opening / closing valve is closed to stop the water supply to the drop hopper 8 and simultaneously stop the driving of the forced circulation pump 6.

[0004]

In the above-mentioned conventional bath device, the forced circulation pump 6 is driven during the dropping water supply to the bathtub, so that the dropping pipe 7 is connected to the hot water storage heating can body 2. The water level A in the drop pipe 7 becomes considerably lower than the water level B in the bathtub 1 due to the suction force.
However, on the other hand, when the driving of the forced circulation pump 6 is stopped at the same time as the water supply is stopped, the drop pressure due to the stop of the water supply is canceled, and the suction force of the water in the drop pipe 7 toward the inside of the can body 2 is canceled. Presence of depressurized state in the drop hopper 8,
Also, the compressed air accumulated in the hot water storage type heating body 2 is returned and expanded to the side of the drop pipe 7 and the atmospheric pressure applied to the water surface of the bathtub 1 acts at the same time, resulting in the pump. After the stop of 6, the water level in the drop pipe 7 suddenly and largely reacts, and a backflow from the drop pipe 7 into the drop hopper 8 occurs, so that the water from the drop hopper 8 having a volume much smaller than the downstream capacity is discharged. There was a problem that would overflow.

Therefore, the present invention solves the drawbacks of the conventional bath device described above, and utilizes the negative pressure generated in the hot-water storage can while forcedly circulating the bath water in the hot-water storage can.
In a bath device that allows the water supplied to the drop hopper to be sucked from the drop pipe into the hot-water storage heating can body and further supplied to the bathtub, when the water supply is stopped, the water drops suddenly into the hopper. It is an object of the present invention to provide a bath device that prevents backflow into the bath and thereby prevents overflow from the dropping hopper.

[0006]

In order to achieve the above object, the bath device of the present invention comprises a bathtub, a hot water storage heating can body provided outside the bathtub, and water from the bathtub to the hot water storage heating can body. A return pipe that connects the passage, a return pipe that connects the water passage from the hot-water storage heating can body to the bathtub, and a portion of the water that has entered the hot-water storage heating can body from the forward pipe to suck in the return pipe side. Pipe for forced circulation for discharging into the pipe, a pump for forced circulation arranged in the middle of the pipe, a drop pipe standingly connected to the hot water storage type heating can body, and a drop hopper provided at the upper end thereof A bath device having
Along with the start of driving the forced circulation pump with the start of water drop using the drop hopper,
It is characterized in that the driving of the forced circulation pump is stopped with a certain delay time with respect to the stop of the water drop using the hopper.

[0007]

According to the above feature of the present invention, when the water supply operation is stopped, the drop of water is stopped first, and then the forced circulation pump is driven with a certain delay time, that is, a time lag. Is stopped. Therefore, it is caused by the elimination of the drop pressure caused by the stop of the drop, the rise of the water level in the drop pipe due to the expansion of the air compressed and stored in the hot water storage heating can body 2, and the forced circulation pump being stopped. , A factor of water level rise due to elimination of suction force of water in the drop pipe toward the inside of the can, presence of a decompressed state in the drop hopper, return of air accumulated in the hot water storage type heating can 2 to the drop pipe side, etc. And are separated. Moreover, even after the water supply is stopped, the forced circulation pump is continuously driven for a certain delay time, during which the water in the drop pipe is continuously sent to the bathtub side through the hot water storage heating can body. Therefore, the rise of the water level in the drop pipe when the drive of the forced circulation pump is stopped is suppressed, and the overflow from the drop hopper is eliminated.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. FIG. 1 is a configuration diagram of a bath apparatus showing an embodiment of the present invention, FIG. 2 is a vertical cross-sectional view of a drop hopper used in the bath apparatus of the embodiment, and FIG. 3 is a timing chart of driving related members at the time of supplying water to a bath by a controller. Is.

Since the general structure of the bath apparatus of the embodiment is the same as that described in the section of the prior art,
The description is omitted. The configuration of the drop hopper 8 in this embodiment will be described with reference to FIG. 2. FIG. 2 shows a state in which water is being supplied to the bathtub 1. The receiving container portion 10 provided in the upper part of the device is a solenoid on-off valve V1 for dropping hot water and hot water from the hot water supply passage U1 and the water supply passage U2, respectively.
Water is received via the electromagnetic on-off valve V2. A drop-in port 11 is opened at the center of the bottom of the receiving container part 10, and a drop-in outer cylinder body 20 is connected to the drop-in port 11 so as to communicate therewith. The drop-in outer cylinder body 20 has a hopper shape in which the lower portion is thin. This drop outer cylinder
An inner cylinder 30 is arranged in a double-tube shape with a proper gap S formed between the inner cylinder 20 and the outer cylinder 20. The upper opening of this inner cylinder 30
The numeral 31 is located right below the drop-in port 11 and allows most of the water injected from the drop-in port 11 to flow into the inner cylindrical body 30. That is, the inside of the inner cylinder 30 serves as the main passage for water injection. The inner tubular body 30 has a lower portion that is narrowed to form a double cylindrical tube concentric with the outer tubular body 20. The drop pipe 7 is connected to the double cylindrical pipe. The water that has flowed out of the apparatus from the lower end opening of the inner cylinder 30 flows into the hot water storage heating can body 2 through the drop pipe 7.

An overflow port 21 is formed in the side wall of the outer cylindrical body 20.
Is provided. A normally open spring-biased diaphragm valve 50 is provided facing the overflow port 21 from the outside. The normally open spring urging diaphragm valve 50 normally opens the overflow port 21 by the urging spring 51. A pressure chamber 60 is provided behind the normally open spring-biased diaphragm valve 50, and the pressure chamber 60 is connected to a side portion of the receiving container 10 by a pressure introduction passage 61.

In the above construction, when the hot water is not supplied and the water is not supplied, the drop-in electromagnetic on-off valves V1 and V2 are closed, so that the water is not injected into the receiving container portion 10, and therefore the water is introduced through the pressure introducing passage 61. Since part of the water injection is not drawn into the pressure chamber 60 and the pressure chamber 60 is not pressurized,
The diaphragm valve 50 is overflowed by the biasing spring 51.
Keep 21 open. Therefore, in this state, when there is a backflow from the downstream side water supply passage L, the backwashed miscellaneous water is surely discharged from the overflow port 21, and the backflow to the upstream side water supply passages U1 and U2 above it. Do not reach

On the other hand, when either or both of the drop-in electromagnetic on-off valves V1 and V2 are opened (in FIG. 2, V2 on the water supply side is opened) and water is injected, the water is poured into the receiving container portion 10, Further, most of the water is dropped into the outer tubular body 20 through the drop port 11, and most of it flows into the inner tubular body 30 which is the main passage and flows out downward. At this time, due to the momentum of the flow rate flowing out from the inner cylindrical body 30, the gap S between the inner cylindrical body 30 and the outer cylindrical body 20, which is the sub passage, is in a negative pressure state. Further, a part of the water injected from the receiving container portion 10 is drawn into the pressurizing chamber 60 through the pressurizing introducing passage 61, and the pressurizing chamber 60 is pressurized by this, and the diaphragm valve 50 resists the spring 51 and overflows. Press to 21. The pressing force and the suction force due to the negative pressure state of the gap S act on the diaphragm valve 50, so that the diaphragm valve 50 surely closes the overflow port 21 and the overflow during water injection is reliably prevented. Further, the overflow port 21 can be reliably closed even when the amount of injected water is small. Therefore, leakage of water can be prevented and air can be mixed reliably from a large flow rate to a small flow rate.

The operation of supplying water to the bathtub in this apparatus is shown in FIG.
Referring also to the description, when the water supply switch to the bathtub (not shown) is turned on, the controller 9 causes the controller 9 to supply water from the water source (not shown) to the hopper 8 via the water supply passage U2. The on-off valve V2 is opened and the driving of the forced circulation pump 6 is started. The water thus supplied enters the hot water storage type heating can body 2 from the dropping hopper 8 through the dropping pipe 7. By driving the forced circulation pump 6, part of the water that has entered the hot water storage heating can body 2 from the bathtub 1 through the outflow pipe 3 is sucked into the forced circulation pipe 5, and the forced circulation pipe 5 It is discharged vigorously to the return pipe 4 side through the inside. The negative pressure generated by this draws the water in the hot water storage heating can body 2 toward the return pipe 4, so that the bath water is forcedly circulated through the outflow pipe 3, the hot water storage heating can body 2, and the return pipe 4. . By this forced circulation, the water in the dropping pipe 7 is also sucked and quickly dropped into the hot water storage heating can body 2. Further, the forced circulation causes the inside of the bath 1 to be agitated, and the temperature can be made uniform. The above situation is the same as the conventional case.

According to the present invention, when the predetermined drop into the bathtub 1 is completed and the water supply switch is turned off, the controller 9 issues a command to close the water drop electromagnetic on-off valve V2, and a fixed delay time t ₁ is also applied thereto. Then, it issues a drive stop command to the forced circulation pump 6. The driving of the forced circulation pump 6 is stopped at the delay time t ₁ after the water supply is stopped. Therefore, the water drop solenoid valve V2
A large rise in the water level of the drop pipe 7 due to the closing of the valve is prevented because the forced circulation pump 6 is continuously driven. On the other hand, when the drive of the forced circulation pump 6 is stopped later, since the water supply is already stopped, the factor of increasing the water level generated when the water supply is stopped is no longer added, and the water level of the drop pipe 7 is still largely increased. Does not occur. The constant delay time t ₁ is set in advance as the time until the water level rise accompanying the closing of the water drop solenoid valve V2 is terminated after the closing command of the water drop solenoid on-off valve V2 is issued, or the cause thereof is resolved. It can be obtained by an experiment, but can be set to 2 seconds, for example.

[0015]

According to the present invention, which has the above-described structure,
According to the bath device described in (1), since the driving of the forced circulation pump is stopped with a certain delay time with respect to the stop of the water drop, the drop pipe generated when the drop is stopped is Factors that raise the water level,
The water level rise factor that occurs when the forced circulation pump is stopped can be generated in a timely manner, and even after the water supply is stopped, the forced circulation pump that is driven for a certain delay time continues The water can be continuously sent to the bathtub side. Therefore, it is possible to solve the problem of overflow from the drop hopper due to the rise in the water level of the drop pipe when the water supply operation to the bathtub is stopped.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a bath device showing an embodiment of the present invention.

FIG. 2 is a vertical cross-sectional view of a drop hopper used in the bath device of the embodiment.

FIG. 3 is a timing chart of driving related members when water is supplied to the bathtub by the controller in the bath apparatus of the embodiment.

FIG. 4 is a timing chart of driving related members when water is supplied to a bathtub by a controller in a conventional bath device.

[Explanation of symbols]

 1 Bathtub 2 Hot water storage type heating can 3 Forward pipe 4 Return pipe 5 Forced circulation pipe 6 Forced circulation pump 7 Drop pipe 8 Drop hopper 9 Controller

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kazuhiro Kimura 32 Akashi-cho, Chuo-ku, Kobe-shi, Hyogo In stock company Noritsu

Claims (1)

[Claims] 1. A bathtub, a hot water storage heating can body provided outside the bathtub, a forward pipe connecting a water passage from the bathtub to the hot water storage heating can body, and a water passage from the hot water storage heating can body to the bathtub. And a return pipe for connecting the above, a forced circulation pipe for sucking a part of the water that has entered the hot water storage heating can body from the forward pipe and discharging it to the return pipe side, and a pipe disposed in the middle of the pipe. A bath device having a forced circulation pump, a drop pipe vertically connected to the hot water storage type heating can body, and a drop hopper provided at the upper end of the drop pipe, wherein water is dropped using the drop hopper. The driving of the forced circulation pump is started along with the start, and the driving of the forced circulation pump is stopped with a certain delay time with respect to the stop of the water drop using the hopper. Special Bath equipment to collect.