JPH09329360A - Hot water supply apparatus of bath - Google Patents

Abstract

PROBLEM TO BE SOLVED: To securely separate the contaminated water side from the service water side of a hot water heater by pouring water with service water pressure. SOLUTION: There are provided a main valve chamber 15, a separation chamber 16, a drain chamber 17, and a discharge valve chamber 18 on a hot water supply passage extending from a hot water supply pipe 7 to an additional heating circulation pipe passage 4. A pilot solenoid valve 25 is provided in the main valve chamber 15 for opening/closing an inlet side of a valve hole passage 24, and a first check valve 26 for opening/closing an outlet side of the valve hole passage 24 and an atmosphere release valve 27 for opening/closing a valve hole 41 are provided in the separation chamber 16, and a negative pressure closing valve 51 and a second check valve 54 are provided in the discharge valve chamber 18. A drain pipe 61 disposed on a bottom surface side of the drain chamber 17 is connected with a return pipe 59 on a suction side of a circulation pump 2, and a solenoid valve 63 is provided on the drain pipe 61. A motor driven two way valve 64 is provided at an additional heating circulation pipe passage position disposed on the side of a bathtub 1 from a connection part of the drain pipe 61. The motor driven two way valve 64 is opened upon pouring water, and is closed upon draining of the drain camber 17.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot water supply device for a bath, in which hot water of a hot water supply device is dropped from a hot water supply pipe into a reheating circulation pipe line of a bath kettle to automatically fill the hot water of the bath.

[0002]

2. Description of the Related Art As is well known, a hot water supply device for a bath branches a hot water supply pipe of a water heater and connects one of the hot water supply pipes to a reheating circuit of a bath kettle, and feeds hot water from the water heater to the branch pipe. The bath is dropped into the bathtub through the boiler circulation line and the bath is automatically filled with hot water. Normally, the hot water supply device of this bath is provided with a backflow preventing means for preventing the water in the bath from flowing back to the water heater. ing.

FIG. 4 shows a bath water heater provided with a backflow preventing means. Referring to FIG. 1, a bathtub 1 is provided with a recirculation line 4 for sucking hot water in the bathtub 1 with a circulation pump 2 and returning the bathwater to the bathtub 1 through a reheating heat exchanger 3. A hot water supply pipe 7 is provided for heating the water supplied from the pipe 5 with a hot water supply heat exchanger 6 and feeding the hot water obtained by the heating to a desired place.
The hot water supply pipe 7 and the additional heating circulation pipe 4 are connected via an electromagnetic valve 10, a hopper 11 as a backflow preventing means, and a check valve 12, and when the bathtub 1 is filled with hot water, the hot water supply pipe 7 Hot water is dropped into the bathtub 1 from the reheating circuit 4 by sequentially passing through the solenoid valve 10, the hopper 11, and the check valve 12. The hopper 11 completely cuts off the hot water supply pipe 7 and the reheating line 4 to completely block the hot water in the bathtub 1 from flowing back to the hot water supply pipe 7.

[0004] However, since the former backflow prevention means is constituted by the hopper 11, when the hot water from the water heater is supplied to the additional heating circulation line 4, the water pressure on the solenoid valve 10 is reduced. Because it does not directly add to the pipe on the side of the stop valve 12,
There was an inconvenience that the filling speed became slow and it took a long time to complete the filling.

In order to eliminate such inconvenience, at present, as shown in FIG. 5, a first check valve 13 is connected to a branch pipe 8 that connects the hot water supply pipe 7 and the circulation follow-up heating pipe 4. , A series connection of the vacuum breaker 14, the solenoid valve 10, and the second check valve 12, and the series connection of the valve is disposed at a position higher than the bathtub 1; Backflow to the pipe 7 side is prevented. In this way, if the backflow prevention means is formed by the valve series connection of the check valves 12, 13, the vacuum breaker 14, and the solenoid valve 10, the tap water pressure will be driven from the hot water supply pipe 7 side when filling the water. It is directly transmitted to the burning circulation line 4 side, which improves the filling speed.

[0006]

However, in the hot water supply device for a bath incorporating the backflow prevention means shown in FIG. 5, the bathtub 1 is placed at a position higher than the vacuum breaker 14 of the backflow prevention means, for example, the vacuum breaker 14 at home. There is an inconvenience that it cannot be installed on the first floor and the bathtub cannot be installed on the second floor of the home. When the bathtub 1 is installed on the second floor, if the water supply is cut off, the hot water supply pipe 7 side will be at a lower pressure than the reheating boiler circulation line 4 side, but if the check valves 12, 13 and the solenoid valve 10 fail at this time, In this case, the bath water in the bathtub 1 flows back to the hot water supply pipe 7 side, which causes a serious hygiene problem.

The present invention has been made to solve the above-mentioned conventional problems, and an object thereof is to make it possible to fill water by utilizing tap water pressure, and even if the bathtub is provided at a high position. It is an object of the present invention to provide a hot water supply device for a bath, which can completely prevent the hot water on the side from flowing backward to the hot water supply pipe side.

[0008]

In order to achieve the above object, the present invention takes the following measures. That is,
According to a first aspect of the invention, a hot water supply passage that connects a hot water supply pipe of a water heater and a reheating circulation pipe of a bath are provided with a main valve chamber, an edging chamber, and a discharge side valve chamber in order from upstream to downstream. The
A drainage chamber that is maintained at atmospheric pressure is installed below the edging chamber, a main opening / closing valve that opens and closes the hot water supply passage is provided in the main valve chamber, and the edging chamber is provided with the main A first check valve that opens a valve hole passage that introduces hot water from the valve chamber and closes the valve hole passage when water passage is stopped, and when the first check valve opens in conjunction with the first check valve. An atmosphere release valve is provided for closing the atmosphere release port, which is a communication port between the rim cutting chamber and the drainage chamber, and opening the atmosphere opening port when the first check valve is closed to open the rim cutting chamber to the atmosphere. Is provided with a second check valve for preventing backflow from the downstream side, and a negative pressure stop valve is provided between the second check valve and the first check valve of the edging chamber. This negative pressure shutoff valve allows the force in the valve closing direction due to the biasing force of the spring to overcome the force in the valve opening direction due to the pressure in the edging chamber. Form and arrangement for closing and water level sensor which detects the water pressure and water level in the tub is provided,
A drainage passage connected to the suction side pipeline of the circulation pump incorporated in the reheating circulation pipeline via the first control opening / closing valve is provided at the bottom of the drainage chamber, and the drainage passage is connected. A second control opening / closing valve that opens and closes the pipeline is provided at the position of the reheating circulation pipeline that is closer to the bathtub than the section, and the filling operation in the bath is controlled by the control means.
The control means opens the main opening / closing valve at the start of filling with water, closes the first control opening / closing valve, and opens the second control opening / closing valve to chase the hot water supplied from the hot water supply passage to the upstream side of the circulation pipe. The control structure is such that the water is dropped into the pipes on both sides of the return side, the hot water is dropped into the bathtub, and when the water level sensor detects that the hot water has been filled to the set water level, the main on-off valve is closed and the water filling is completed. Having it is a means to solve the problem.

The second aspect of the present invention is provided with the structure of the first aspect of the invention, wherein the water level sensor is provided in the hot water supply passage downstream of the negative pressure stop valve to solve the problem. .

In the present invention having the above structure, when the main opening / closing valve is opened, the hot water on the hot water supply pipe side enters the main valve chamber, and the first check valve is opened at the same time as the first check valve is opened by the water pressure of the hot water supply. Since the atmosphere opening valve closes the atmosphere opening port that communicates with the drainage chamber in conjunction with the stop valve, direct water pressure is applied to the hot water to be supplied, and the hot water that enters the rim cutting chamber from the valve hole passage will be connected to the negative pressure stop valve. The check valve 2 is pushed open to enter the reheating circulation line, and the second control opening / closing valve is opened when the main opening / closing valve is opened. And it is dropped into the bathtub from both sides of the return side.

When the main open / close valve is closed to stop the pouring of hot water into the bath, the first check valve closes the valve hole passage, and the atmosphere release valve is opened in conjunction with the first check valve. As a result, the edging chamber is opened to the atmosphere through the overflow pipe of the drainage chamber, and the edging of the reheating circulation line side and the hot water supply pipe side is performed.

Further, even if the hot water supply pipe side becomes negative pressure for some reason such as water cutoff, and the second check valve fails, and the waste water on the reheating circulation line side enters the rimming chamber from the discharge valve chamber side. Since the edging chamber is open to the atmosphere and edging, the sewage that has entered the edging chamber does not enter the hot water supply pipe side but enters the drain chamber side through the atmosphere opening port. At this time, when the first control on-off valve is opened and the second control on-off valve is closed to drive the circulation pump, the hot and cold water accumulated in the drainage chamber is sucked into the circulation pump through the drainage passage and is driven from the discharge side of the pump. It is discharged to the bathtub through the burning circulation line. At this time, even if the circulation pump does not start due to a power failure, etc., when the sewage that has entered the drainage chamber exceeds the water level in the overflow pipe, the sewage is discharged outside through the overflow pipe, so the sewage is supplied to the hot water supply pipe. It doesn't get in your side.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. In the description of the present embodiment, the same parts as those of the conventional example are denoted by the same reference numerals, and detailed description thereof will be omitted. FIG. 1 shows an embodiment of a hot water supply device for a bath according to the present invention as an example of a system configuration of an automatic bath heater, and FIG. 2 is an enlarged detailed view of a valve mechanism portion of the hot water supply device in the embodiment. It is shown. In these figures, the hot water supply device includes a main valve chamber 15, an edging chamber 16,
A drainage chamber 17 and a discharge valve chamber 18 are provided.

The inlet passage 20 of the main valve chamber 15 is connected to the hot water supply pipe 7 of the water heater 21 via the pipe 9 upstream of the hot water supply passage. A cylindrical wall that functions as a valve seat 23 projects from the bottom wall 22 of the main valve chamber 15, and a valve hole passage is provided above the valve seat 23.
A pilot solenoid valve 25 that functions as a main opening / closing valve that opens and closes the inlet side of 24 is provided.

The edging chamber 16 is provided below the main valve chamber 15, and the edging chamber 16 is provided with a first check valve 26 and an atmosphere opening valve 27.

The first check valve 26 has a valve body 28 which is movable up and down along the inner wall surface of the edging chamber 16.
A seal member 30 such as an O-ring is mounted on the upper side of the valve member. The seal member 30 abuts against an inclined wall surface 31 provided on the outlet side of the valve hole passage 24, and the valve body 28 moves up and down. The outlet of the valve hole passage 24 is opened and closed. At the center of the valve body 28, there is provided a body portion 32 protruding downward, and a barrel member 34 having a flange 33 is loosely fitted in the body portion 32 so as to be vertically slidable. A pilot valve hole 36 is formed at the center of the bottom wall 35 of the member 34. The pilot valve hole 36 faces the lower end surface of the body 32 of the valve body 28,
A valve 37 is provided on this lower end surface, and the pilot valve hole 36 is opened and closed by this valve 37. An engagement piece 40 is provided so as to project inward from the peripheral wall side of the valve body 28. The engagement piece 40 is provided with a collar when the valve body 28 moves upward.
It is configured to be engaged with 33 and to pull the tubular member 34 upward in cooperation with the valve body 28.

A valve 42 that opens and closes a valve hole 41 that connects the edging chamber 16 and the drainage chamber 17 is provided on the lower end surface side of the bottom wall 35 of the cylindrical member 34. Hole 41 valve
It is closed by 42, and at this time, as shown in FIG. 3, a gap 43 is formed between the engaging piece 40 and the collar 33. A spring 44 is disposed between the engagement piece 40 and the bottom wall of the edging chamber 16, and the valve body 28 is normally urged upward by the restoring force of the spring 44, and the outlet side of the valve hole passage 24. Is closed by the seal member 30, and the valve hole 41 is opened in this state. Note that the tubular member 34 and the valve 42 integrally form an atmosphere opening valve 27 that opens and closes the valve hole 41.

The discharge valve chamber 18 has an upper chamber 46 and a lower chamber 47 and is arranged adjacent to the edging chamber 16, and a passage 45 extending laterally from the edging chamber 16 connects the edging chamber 16 and the upper chamber 46. Communication is being pursued. A valve hole 50 is formed in the partition wall 48 of the upper chamber 46 and the lower chamber 47, and a negative pressure stop valve 51 is provided on the inlet side of the valve hole 50. The negative pressure stop valve 51 and the upper chamber 46
A compression spring 53 is provided between the top walls 52 of the valve hole 50, and the valve hole 50 is closed by a negative pressure stop valve 51 under the biasing force of the spring 53. That is, the negative pressure stop valve
51 is opened by the force in the valve opening direction due to the pressure in the edging chamber 16 overcoming the force in the valve closing direction of the spring 53, and conversely, the force in the valve closing direction of the spring 53 is the force in the valve opening direction. To overcome and close the valve. On the other hand, the lower chamber 47 is provided with a second check valve 54 for opening and closing the outlet side of the valve hole 50. Similarly, between the second check valve 54 and the bottom of the lower chamber 47, a compressed state is provided. The outlet side of the valve hole 50 is closed by a second check valve 54 by the urging force of the spring 55. The lower chamber 47 is connected to the reheating line 4 via a filling tube 56 that forms the downstream side of the hot water supply passage.

A guide shaft 57 is projected upward from the bottom side of the drainage chamber 17 communicating with the edging chamber 16 via the valve hole 41, and a float 58 is slidable on the guide shaft 57. It is fitted. A magnet (not shown) is attached to the float 58, and a reed switch (not shown) is provided on the wall surface of the drainage chamber 17, so that when the float 58 receives buoyancy and rises to a preset water level. , The magnet of the float 58 side and the reed switch face each other,
An ON signal for activating the circulation pump 2 is output from the reed switch, and a water level switch is formed by the magnet on the float 58 side and the reed switch. Further, an overflow pipe 60 protruding upward from the bottom wall side of the drainage chamber 17 is provided, and when the water level of the drainage chamber 17 exceeds the upper end of the overflow pipe 60, the overflow water (hot water) overflows. It is designed to be discharged through a tube 60.

Further, an inlet side of a drainage pipe 61 as a drainage passage is connected to the bottom wall of the drainage chamber 17, and an outlet side of the drainage pipe 61 is connected to a return pipe 59 of the reheating circulation line 4, that is, a circulation pump. 2 is connected to the suction side pipe line. The drain pipe 61 is provided with a third check valve 62 and a solenoid valve 63 that functions as a first control opening / closing valve. Also, the drain pipe 61
An electric two-way valve 64 as a second control opening / closing valve is provided on the return pipe 59 closer to the bathtub 1 side than the outlet-side connecting portion. In the figure, 65 is a flow sensor, 66 is a water control valve, 67
Is a water level sensor (pressure sensor) for detecting the water level in the bathtub 1 by pressure (water pressure), and 68 is a reheating water switch for detecting the flow of reheating hot water.

The hot water supply device for the bath of this embodiment is constructed as described above, and its operation will be described below. First,
When the inlet side of the valve hole passage 24 is opened by the opening operation of the pilot solenoid valve 25 by the control means (not shown), the hot water supplied from the hot water supply pipe 7 side enters the valve hole passage 24, and the water pressure causes the valve to open. The body 28 is pushed downward against the biasing force of the spring 44, and the outlet side of the valve hole passage 24 is opened. At the same time, the valve body
The downward movement of the valve 37 by the downward movement of the valve 28 closes the pilot valve hole 36, and similarly the valve hole 41 is closed by the downward movement of the valve 42, thereby cutting off the communication between the edging chamber 16 and the drainage chamber 17. It Due to this disconnection, the hot water entering the edging chamber 16 springs the negative pressure stop valve 51 by the water pressure.
As a result of pushing up against the urging force of 53 to enter the valve hole 50, and further pushing down the second check valve 54 against the urging force of the spring 55 to open the outlet side of the valve hole 50, Valve hole
From 50, it enters the lower chamber 47, and further through the hot water filling pipe 56 into the reheating circulation line 4. At this time, since the electric two-way valve 64 is opened by the control means at the start of filling, the hot water that has entered the reheating circulation line 4 is on both sides of the forward pipe 69 and the return pipe 59 of this reheating circulation line. Is dropped into the bathtub 1 by tap water pressure.

The water level of the water filling the bathtub 1 is a water level sensor.
When the set water level is detected by 67, the inlet side of the valve hole passage 24 is closed by the closing operation of the pilot solenoid valve 25 by the control means, resulting in a force lower than the force pressing the valve body 28 downward. The upward biasing force of the spring 44 overcomes and the valve body 28 starts to move upward. At this time, the valve
Engagement piece on the valve body 28 side with the flange 33 of the tubular member 34 in which 42 is formed
As shown in FIG. 3, a gap 43 is formed between the valve body 28 and the valve 40, so that the valve body 28 first moves upward until the engagement piece 40 is locked by the collar 33 (this upward movement is caused by the upper side of the valve body 28). Since the same pressure is applied to the lower side and the lower side, the movement is easily performed.) As a result of this upward movement of the valve body 28, the valve 37 also moves upward in conjunction with the result that the pilot valve hole 36 is First opened. Then, the atmosphere on the side of the drainage chamber 17 is exposed to the pilot valve hole 36.
As a result of entering into the edging chamber 16 through it, the edging chamber 16 becomes atmospheric pressure, and the force of closing the valve hole 41 by the valve 42 using the water pressure in the edging chamber 16 is released.

When the valve body 28 continues to rise further due to the restoring force of the spring 44, the engaging piece 40 engages with the flange 33, and the tubular member
Since 34 moves upward integrally with the valve body 28, the valve 42 also moves upward integrally, the valve hole 41 is completely opened, and the outlet side of the valve hole passage 24 is sealed by the first check valve 26. Closed by member 30. At this time, the hot water filled in the edging chamber was opened in the valve hole.
41 enters the drain chamber 17 side, but at this time, float 58
When buoyancy rises to the set position, the reed switch outputs an ON signal, the solenoid valve 63 is opened, the electric two-way valve 64 is closed, and the circulation pump 2 is started. After passing through the drainage pipe 61, the water collected in is forcibly reheated by the circulation pump 2 and the forward pipe 69 of the circulation pipe line 4
Drained into the bathtub 1 from the side.

Further, the opening of the pilot valve hole 36 by the valve 37 during the closing operation of the pilot solenoid valve 25 causes the edging chamber to be closed.
When the inside of the edging chamber 16 is replaced with the atmospheric pressure, the pressure inside the edging chamber 16 decreases, and the spring 53 is against the upward pushing force (force in the valve opening direction) of the negative pressure closing valve 51 due to the pressure inside the edging chamber 16. The downward pressure force of the negative pressure closing valve 51 (the force in the valve closing direction) overcomes, and the negative pressure closing valve 51 closes the inlet side of the valve hole 50 by the urging force of the spring 53, and the air on the drain chamber 17 side is closed. From entering the valve hole 50 through the edging chamber 16. The second check valve 54 also closes the outlet side of the valve hole 50 by the urging force of the spring 55 at the same time as the closing operation of the pilot solenoid valve 25, so that the wastewater from the reheating circulation line 3 side cuts the edge through the valve hole 50. Chamber 16
Prevent it from entering your side.

In the above embodiment, when opening the edging chamber 16 to the atmosphere, first, the valve 37 is moved upward in conjunction with the upward movement of the valve body 28 to open the pilot valve hole 36, and the edging chamber 16 is enlarged. Since the engaging piece 40 and the flange 33 are engaged with each other to make the valve 42 move upward by opening the valve hole 41 after the pressure is changed to the atmospheric pressure, the valve hole 41 is opened by using the spring 44 having a small restoring force.
You can open 41. When the pilot valve hole 36 and the valve 37 are not provided, when the valve 42 is opened, the edging chamber 16 has a higher pressure than the drainage chamber 17, and therefore the valve 42 moves downward due to this pressure difference. Pressed valve hole 41
When the valve hole 41 is opened, a spring 44 having a strong restoring force that overcomes the pressure difference must be used.
When opening and filling water, there is a problem that the valve 42 is pushed down by using the water pressure of the hot water that has entered the valve hole passage 24 and the valve hole 41 cannot be closed, but as in the present embodiment example, By providing the pilot valve hole 36 and the valve 37, first opening the pilot valve hole 36 to eliminate the pressure difference, and then opening the valve hole 41, it is possible to reduce the restoring force of the spring 44, A problem caused by increasing the restoring force of the spring 44 can be solved.

Further, since the restoring force of the spring 44 can be made small, it is possible to quickly push down the first check valve 26 and the atmosphere release valve 27 by the hot water supply pressure when filling the hot water. As a result, the time from the opening of the first check valve 26 to the closing of the valve hole 41 of the atmosphere opening port by the atmosphere opening valve 27 (valve 42) can be shortened, and during that time, the atmosphere opening port 41 can open the drainage chamber. It is possible to reduce the wasteful amount of wastewater discharged from hot water discharged in 17.

Further, in the present embodiment, since the passage 45 which connects the edging chamber 16 and the upper chamber 46 of the discharge valve chamber 18 is provided below the outlet side closing surface of the valve hole passage 24, the water filling is performed. When performing the above, the first check valve 26 can be easily pushed down by the water pressure. This passage 45 is connected to the first check valve 26.
If it is provided above the closing surface of, the stagnation part is generated on the upper side of the passage 45, the pressure in the passage 45 becomes high, and this pressure acts in the direction of closing the first check valve 26. When the pilot solenoid valve 25 is opened and the hot water on the side of the water heater enters the valve hole passage 24, the first check valve 2 due to the tap water pressure of the hot water.
6, that is, it is difficult to push the valve element 28 downward, but by providing the passage 45 below the closing surface of the first check valve 26 as in the present embodiment, the passage 45 There is no stagnation inside, and therefore, no force is generated from the passage 45 side in the direction of closing the first check valve 26. Therefore, when the water is filled, the first check valve 26 is easily lowered by the tap water pressure. It is possible to push it down, and it is possible to perform the filling operation smoothly.

Further, since the discharge valve chamber is provided with the negative pressure shutoff valve 51, when the pilot solenoid valve 25 is closed to stop the water flow of the water filling, the negative pressure shutoff valve 51 is closed to close the edging chamber. It is possible to prevent air from entering into the water filling pipe 56 from the 16 side, which allows the water level sensor to
When the water level sensor 67 is provided, it is possible to prevent the problem that the air level sensor 67 causes an erroneous operation in the water level detection of the bathtub due to the air entering the water filling pipe 56. Also, the water filling pipe
Air enters the circulation pump 2 from the 56 side and the circulation pump 2
It is also possible to prevent the problem that the operation of (1) causes trouble.

In this case, as a means for preventing air from being mixed into the water filling pipe 56 from the side of the edging chamber 16, instead of the negative pressure closing valve 51 utilizing the closing force of the spring 53, for example, an electrically operated solenoid valve or the like is used. Although it is possible to use a valve, in such a configuration, the time from when the pilot solenoid valve closing signal is output to when the electric valve is closed is controlled according to the flow rate and pressure of the hot water flow. The problem arises that it is difficult to do. For example, if the closing timing of the motor-operated valve is too late, the air due to the opening of the edging chamber 16 to the atmosphere will enter the inside of the water filling pipe 56. If the closing timing is too early, the first check Since the motor-operated valve is closed before the pressure at which the valve 26 is closed is reduced, the inside of the edging chamber 16 is maintained at the hot water supply pressure (tap water pressure), and the pilot valve hole 36 and the valve are closed.
When the mechanism of 37 is omitted, the first check valve 26 cannot be closed, and therefore the atmosphere opening port (valve hole 4
As a result, 1) cannot be opened, and the edging in the edging chamber 16 cannot be performed.

On the other hand, in this embodiment, the urging force of the spring 53 is utilized, and the urging force of the spring 53 in the valve closing direction is changed in the valve opening direction by the pressure in the edging chamber 16 when the atmosphere in the edging chamber 16 is opened to the atmosphere. When overcoming the force, its spring 53
Since the negative pressure shutoff valve is configured to be closed by the biasing force of the spring, by setting the restoring force of the spring 53 appropriately, it is suitable when the filling is stopped regardless of the flow rate or pressure of the hot water supply. By closing the negative pressure stop valve at various timings, it is possible to prevent air from entering the water filling pipe 56 and to perform a reliable edge cutting operation of the edge cutting chamber 16.

Further, when the bathtub 1 is provided above the appliance (hot water supply device), for example, when the hot water supply device is provided on the first floor of the home and the bathtub 1 is provided on the second floor of the home, Wastewater on the 1st side is cut off by the second check valve 54
It is safe for hygiene because it is prevented from entering the 16 side. In this case, a failure occurs in the first check valve 26 and the second check valve 54,
Even if sewage from the bathtub 1 enters the edging room 16,
This sewage enters the drainage chamber 17 from the edging chamber 16, and when the float 58 rises to a predetermined water level, an ON signal is output from the reed switch to start the circulation pump 2 and to operate the electric two-way valve 64.
As a result of the closing operation of the solenoid valve and the opening operation of the solenoid valve 63,
The sewage collected in 17 is forcibly returned by the circulation pump 2 to the bathtub 1 side through the forward pipe 69 of the reheating circulation line 4, and the sewage on the bathtub 1 side does not flow back to the water heater side.

When the drainage chamber 17 is drained, the electromagnetic valve 63 is opened and the electric two-way valve 64 is closed to drive the circulation pump 2 in this embodiment, so that the suction force of the circulation pump 2 is applied to the drainage chamber 17. It can be made to act on the 17 side in a concentrated manner, whereby the amount of suction water (drainage water amount) per unit time from the drainage chamber 17 side can be increased, and the hot and cold water accumulated in the drainage chamber 17 can be discharged in a short time. be able to. Since the amount of drainage per unit time can be increased in this way, for example, the valve of the atmosphere release valve 27 is not completely closed during filling with water, so that the edge chamber 16 to the drainage chamber is closed.
Even if hot water continues to leak to the drain 17, the drain operation can be performed without causing the drain chamber 17 to overflow. Further, as described above, the electric two-way valve 64 is closed during drainage, so that even if the bathtub is empty, the air on the bathtub side is not sucked by the circulation pump 2 and the bathtub side is not sucked. It is also possible to prevent that the air is sucked and the drainage operation of the circulation pump 2 is hindered.

Furthermore, when draining water, even if the circulation pump 2 cannot be started due to a power failure or the like, when the level of the sewage collected in the drainage chamber 17 exceeds the upper end opening of the overflow pipe 60, it is removed from the overflow pipe 60. In any case, the sewage side and the clean water side are surely cut off in the edging chamber 16, and it is perfect that the sewage on the bathtub 1 side flows back to the water heater on the clean water side. To be prevented.

The present invention is not limited to the above embodiment, but various embodiments can be adopted.

[0035]

According to the present invention, the rimming chamber is provided in the hot water supply passage for dropping hot water from the water heater side to the bathtub through the reheating circulation line, and the hot water enters the rim cutting chamber from the water heater side. A first check valve for opening and closing the valve and an atmosphere opening valve for closing and opening the atmosphere opening port of the edging chamber in conjunction with the first check valve are provided. 1
Since the check valve is pushed down to open the valve hole passage, and the atmosphere release valve is pushed down to close the atmosphere release port to fill water, the tap water pressure is directly applied to the edging chamber. Therefore, you can drop hot water into the bathtub.

In addition, at the time of this hot water filling, the control means opens the second control on-off valve provided in the reheating circulation pipe line on the suction side of the circulation pump to perform hot water filling, so that the water is supplied through the hot water supply passage. Hot water enters the reheating circulation line and is dropped into the bathtub through both the upstream side and the return side of this reheating circulation line, so one side of the upstream side and the return side of the reheating circulation line Compared with the case of dropping hot water only by using the pipe line of (1), the amount of dropped water becomes large, and the filling speed can be increased in combination with the fact that the filling of water is performed by the tap water pressure. It is possible to efficiently fill water in a short time.

Further, since the second check valve is provided on the downstream side of the edging chamber, even if sewage on the bathtub side tries to flow back from the bathtub side to the water heater side after the filling is stopped, this backflow will occur. It is possible to prevent sewage from entering the water heater side due to the backflow of sewage, which is blocked by the second check valve. Moreover, in the present invention, when the filling is stopped, when the first check valve closes the valve hole passage, the atmosphere opening valve opens the atmosphere opening port of the edging chamber. When the mouth is opened, air enters the edging chamber from the atmosphere opening port and is replaced with atmospheric pressure. Therefore, even if the second check valve fails, sewage on the bathtub side flows back to the edging chamber. Even if this is done, this backflowing wastewater is discharged from the atmosphere opening port to the drainage chamber provided below it, so that it is possible to reliably prevent it from entering the water heater side.

Further, in the present invention, a drainage passage is provided at the bottom of the drainage chamber by connecting the outlet side thereof to the reheating circulation pipe line on the suction side of the circulation pump, which is more than the connection portion of the drainage passage. Since the second control opening / closing valve is provided at the position of the reheating circulation pipe near the bathtub side, the second control opening / closing valve is closed and the first control opening / closing valve provided in the drainage passage is opened. By driving the circulation pump, the suction force of the circulation pump can be concentrated on the drainage chamber, which allows the amount of hot and cold water accumulated in the drainage chamber to be quickly swept from the drainage passage and reheated through the circulation pipeline to the bathtub. When the bathtub is installed at a high place such as the second floor, the second check valve fails and the wastewater can be returned to the bathtub even if the wastewater enters the edging chamber. , Sewage on the bathtub side enters the upper waterway on the water heater side. Safety for writing sewage pollution will be thorough.

Further, since the negative pressure stop valve is provided between the first check valve and the second check valve of the edging chamber, when the edging chamber is opened to the atmosphere when the filling is stopped, It is possible to prevent the air entering the edging chamber from entering the passage on the downstream side of the negative pressure stop valve. In this way, the negative pressure shutoff valve can prevent air from entering the hot water supply passage downstream of the negative pressure shutoff valve, thus preventing the problem that this air enters the circulation pump and interferes with the operation of the circulation pump. it can.

Further, when a water level sensor for detecting the water level of the bathtub is provided in the hot water supply passage downstream of the negative pressure shutoff valve, as described above, the negative pressure shutoff valve allows air to enter from the edge chamber side to the water level sensor side. Can be prevented, the problem that the water level detection operation of the water level sensor is hindered by the mixture of air can be prevented, and the reliability of the water level detection by the water level sensor can be improved.

Further, the negative pressure stop valve of the present invention closes the negative pressure stop valve by the biasing force of the spring when the biasing force by the spring in the valve closing direction overcomes the force in the valve opening direction by the pressure in the edging chamber. Since the valve is configured to be opened, by properly setting the restoring force of the spring of the negative pressure shutoff valve, the negative pressure shutoff valve of the negative pressure shutoff valve can be operated at an appropriate timing when the water filling is stopped regardless of the hot water supply flow rate or the hot water supply water pressure. It becomes possible to perform the valve closing operation, and as a result, it is possible to reliably prevent air from entering the hot water supply passage on the downstream side of the negative pressure shutoff valve when the atmosphere in the rim cutting chamber is opened to the atmosphere, and to prevent the filling of water when the filling is stopped. It is possible to reliably perform the valve closing operation of the valve hole passage by the first check valve to reliably perform the edging in the edging chamber. In addition, the negative pressure shutoff valve increases the force in the closing direction as the negative pressure of the downstream side increases, so the negative pressure on the downstream side increases the air pressure from the atmosphere opening port to the circulation pump or the water level sensor mounting pipe. The effect of preventing mixture can be further enhanced.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing an embodiment of a hot water supply device for a bath according to the present invention together with a system for an automatic bath heater.

FIG. 2 is a detailed explanatory view of a valve mechanism portion of the hot water supply device for a bath in the embodiment.

FIG. 3 is an explanatory diagram of an operating state of the atmosphere release valve during water flow in the embodiment.

FIG. 4 is an explanatory view showing a hot water supply device for a former bath together with a system of an automatic bath heater.

FIG. 5 is an explanatory view showing a conventional general hot water supply device for a bath together with an automatic bath heater system.

[Explanation of symbols]

 2 Circulation pump 4 Reheating circulation line 15 Main valve chamber 16 Edge cut chamber 17 Drainage chamber 18 Discharge valve chamber 26 First check valve 27 Atmosphere release valve 51 Negative pressure stop valve 54 Second check valve 61 Drain pipe ( Drainage passage) 63 Solenoid valve (first control on-off valve) 64 Electric two-way valve (second control on-off valve) 67 Water level sensor

Claims (2)

[Claims] 1. A hot water supply passage that connects a hot water supply pipe of a water heater and a reheating circulation pipe of a bath are provided with a main valve chamber, an edging chamber, and a discharge side valve chamber in order from the upstream side to the downstream side. ,
A drainage chamber that is maintained at atmospheric pressure is installed below the edging chamber, a main opening / closing valve that opens and closes the hot water supply passage is provided in the main valve chamber, and the edging chamber is provided with the main A first check valve that opens a valve hole passage that introduces hot water from the valve chamber and closes the valve hole passage when water passage is stopped, and when the first check valve opens in conjunction with the first check valve. An atmosphere release valve is provided for closing the atmosphere release port, which is a communication port between the rim cutting chamber and the drainage chamber, and opening the atmosphere opening port when the first check valve is closed to open the rim cutting chamber to the atmosphere. Is provided with a second check valve for preventing backflow from the downstream side, and a negative pressure stop valve is provided between the second check valve and the first check valve of the edging chamber. This negative pressure shutoff valve allows the force in the valve closing direction due to the biasing force of the spring to overcome the force in the valve opening direction due to the pressure in the edging chamber. Form and arrangement for closing and water level sensor which detects the water pressure and water level in the tub is provided,
A drainage passage connected to the suction side pipeline of the circulation pump incorporated in the reheating circulation pipeline via the first control opening / closing valve is provided at the bottom of the drainage chamber, and the drainage passage is connected. A second control opening / closing valve that opens and closes the pipeline is provided at the position of the reheating circulation pipeline that is closer to the bathtub than the section, and the filling operation in the bath is controlled by the control means.
The control means opens the main opening / closing valve at the start of filling with water, closes the first control opening / closing valve, and opens the second control opening / closing valve to chase the hot water supplied from the hot water supply passage to the upstream side of the circulation pipe. The control structure is such that the water is dropped into the pipes on both sides of the return side, the hot water is dropped into the bathtub, and when the water level sensor detects that the hot water has been filled to the set water level, the main on-off valve is closed and the water filling is completed. A hot-water supply device for the bath, which is characterized by being equipped. 2. The hot water supply apparatus for a bath according to claim 1, wherein the water level sensor is provided in the hot water supply passage downstream of the negative pressure stop valve.