JPH11248257A - Water heater with bathtub cleaning function - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a water heater applicable to an ordinary bathtub requiring no hot water reservoir in the bottom face or an existing bathtub. SOLUTION: A suction pipe 5e is extended from a single port circulation port 5 to the vicinity of the bottom face of a bathtub 2, a self-suction circulation pump 12 is disposed in the way of a return pipe 9 from the circulation port 5 to a heat exchanger 13 for heating bath water, a first change-over valve 16 is provided in the way of a going pipe 15 from the heat exchanger 13 to the bathtub 2, one outlet of the valve 16 is coupled with a second change-over valve 17, the other outlet of the valve 16 is coupled with a cleaning nozzle 20, one outlet of the valve 17 is coupled with the circulation port 5 and the other outlet of the valve 17 serves as a drain pipe 18.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water heater having a bath tub cleaning function having a function of automatically cleaning a bath tub, and a single-circulation port used for the water heater having a bath tub cleaning function.

[0002]

2. Description of the Related Art Conventionally, cleaning of a bathtub is generally performed manually using a detergent, a brush, or the like.
The manual cleaning of the bathtub had to be performed in a neutral position, requiring physical strength, and was particularly hard work for the elderly. In order to solve these problems, the following is disclosed. a. Although the applicant has not yet disclosed it, Japanese Patent Application No. 8-2457.
No. 35 (hereinafter referred to as “A”) is provided with a recess formed in the bottom of the bathtub and connected to a circulation pump through a water suction pipe from a circulation port formed in the bottom of the pool. A device in which the discharge side of the circulation pump is connected from the water supply pipe to the bathtub cleaning nozzle, heating means is provided between the circulation pump and the water supply pipe, and a switching valve is provided between the heating means and the circulation pump. b. In Utility Model Registration No. 2555506 (hereinafter referred to as “B”), a first return pipe and a second return pipe are connected in parallel from a drain port and a side wall of a bathtub to a suction port of a circulation pump. A switching valve is provided in each of the first return pipe and the second return pipe, a discharge pipe of the circulation pump is connected to the bathtub cleaning nozzle, and a water supply pipe is provided in the discharge pipe.
A bath tub cleaning device in which a detergent supply pipe is connected to an electric heater as a heater is disclosed.

[0003]

However, the above-mentioned conventional bathtub cleaning apparatus has the following problems. In the bath tub cleaning device described in Japanese Patent Publication No. A, the problem is that the bath tub itself is special and cannot be installed in the case of an existing bath tub, because the bath tub is formed in a concave shape on the bottom surface of the bath tub. was there.

[0004] In the bath tub cleaning device described in Japanese Patent Application Publication No. 2002-207, a first return pipe and a second return pipe are piped from a drain port and a side face of the bath tub, respectively, and a switching solenoid valve is attached to each. In addition, there is a problem that the piping work is troublesome and the construction cost is high. In addition, a washing nozzle for bathtub cleaning is attached to the side of the bathtub opposite to the drain port along with the side of the bathtub on the drain port side, and the side of the bathtub opposite this drain port is usually the backrest side during bathing. Therefore, there was a problem that it would interfere with bathing.

An object of the present invention is to solve the above-mentioned conventional problems, and an object of the present invention is to provide a water heater with a bathtub cleaning function which can be used in a normal bathtub or an existing bathtub, has simple piping, and has good workability. .

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned conventional problems, a water heater with a bathtub cleaning function according to the present invention comprises a single-circulation port, a self-priming circulation pump (hereinafter referred to as a circulation pump), and a bath water heater. Heat exchanger, a first switching valve, and a second switching valve.
A switching valve, a washing nozzle, a hot water supply heat exchanger, a hot water beam solenoid valve, and a check valve, and a circulating pump in the middle of the return pipe from the single circulation port to the bath water heating heat exchanger. And a first switching valve is provided in the middle of the pipe from the bath water heating heat exchanger to the bathtub, one of the outlets of the first switching valve is connected to the second switching valve, and the first switching valve is connected. The other end of the valve is connected to a washing nozzle. One of the outlets of the second switching valve is connected to a single-port circulation port through a reheating pipe, and the other of the second switching valve is a drain pipe.

According to the second embodiment, the first switching valve is provided in the middle of the outgoing pipe from the heat exchanger for heating bath water to the bathtub,
One of the outlets of the first switching valve is connected to the second switching valve, and the other of the outlet of the first switching valve is connected to the single-port circulation port through a reheating pipe. One of the outlets of the second switching valve is connected to the washing nozzle, and the other of the second switching valve is a drain pipe.

[0008] The outlet side of the hot water supply heat exchanger is branched into two or more, one is between the discharge side of the circulating pump and the bath water heating heat exchanger via a hot water solenoid valve and a check valve, and the other. Is configured to be a hot water supply pipe connected to a faucet provided in a bath or a kitchen.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a water heater with a bathtub washing function according to the present invention will be described below with reference to the drawings. FIG. 1 is a system diagram showing an entire system including a water heater with a bathtub cleaning function according to an embodiment, and FIG. 2 is a system diagram showing an entire system including a water heater with a bathtub cleaning function according to a second embodiment. . 3 is a cross-sectional view of the mouthpiece circulation port in the embodiment, FIG. 4 is a front view of the mouthpiece circulation port, FIG. 5 is a cross-sectional view of the washing nozzle in the embodiment, and FIG. 6 is a front view of the washing nozzle.

In the drawing, reference numeral 1 denotes a water heater with a bathtub washing function in the embodiment, 2 denotes a bathtub, and 3 denotes a drain port provided at the bottom of the bathtub 2 and a bathtub drain plug 4 made of rubber, plastic, or the like. Attach. Reference numeral 5 denotes a single-port circulation port having a double-tube structure, in which the inner tube side is the suction side and the outer tube side is the discharge side.
The inner tube side is a strainer case 5a, in which a detachable strainer 5c is housed via a sealing material 5b and communicates with a suction port 5d. A suction pipe 5e is attached to the suction port 5d, and has a predetermined length L1 to avoid a curved portion of a connection portion between the side wall and the bottom surface of the bathtub, and a radius of the bathtub drainage plug 4 to enable the bathtub drainage plug 4 to be attached and detached. Suction pipe 5e
The center is shifted by a predetermined length L2 which is longer than the length obtained by adding the radius. Furthermore, in order to be able to adjust the displacement of the opening position of the bathtub side wall at the time of construction,
It is slidable in the vertical direction, and a sealing material 5f is attached to the sliding surface. It is sufficient to insert a hose into the suction port 5d if the suction pipe 5e is to be produced simply, and cut it to an appropriate length if it is too long. Outer tube side is 5h for circulating water discharge when reheating
In the portion to be formed, one to several holes are provided on the outer periphery of the cover 5g. This discharge port 5h may be provided in front of the cover 5g. The outer tube side is formed in two steps of a large diameter portion and a small diameter portion. The large diameter portion serves as the cover 5g, and the small diameter portion is provided with a screw portion 5i on the outside and used for fastening to the bathtub 2. The connecting portion between the large diameter portion and the small diameter portion is formed in a flange shape, and serves as a fastening portion of the packing 6 when fastening to the bathtub 2.

[0011] The single-port circulation port outer case 8 also has a double pipe structure.
The inner pipe communicates with the strainer case 5a and communicates with the return pipe 9, and the outer pipe communicates with a reheating pipe 10 which is described later.
Is combined with The return pipe 9 is connected to a bath water heating heat exchanger 13 via a circulation pump 12. A first switching valve 16 is provided in the middle of the going pipe 15 from the bath water heating heat exchanger 13 to the bathtub 2, and one of the outlets of the first switching valve 16 is connected to the second switching valve 17, The other of the outlets of the first switching valve 16 forms a circuit to the cleaning nozzle 20 via the cleaning pipe 19. One of the outlets of the second switching valve 17 is connected to the outer pipe side of the single-mouth circulation port 5 through the reheating pipe 10, and the other of the outlet of the second switching valve 17 is a drain pipe 18.

According to the second embodiment, the first switching valve 16
Subsequent piping is different from that of the first embodiment. That is, one of the outlets of the first switching valve 16 is connected to the second switching valve 17, and the other of the outlet of the first switching valve 16 is directed to the outer pipe side of the single-circulation port 5 through the reheating pipe 10. A circuit is formed.
One of the outlets of the second switching valve 17 is connected to a cleaning nozzle 20 via a cleaning pipe 19, and the other of the outlet of the second switching valve 17 is a drain pipe 18.

The washing nozzle 20 is rotatable,
When viewed from the front, the rotating part 20a is substantially circular, and the opposite side of the mounting surface has a shape bulging outward, and the rotation hole 20b is tangential to the circle and the bulging part on the opposite side of the mounting surface is formed. A plurality of cleaning holes 20c are formed. A collision member 20d is provided in the internal space of the rotating unit.

Next, the hot water supply circuit will be described. The hot water supply heat exchanger 22 includes a water supply pipe 21 on the inlet side and a hot water supply pipe 2 on the outlet side.
4 is connected, and the hot water supply pipe 24 is branched in two or more directions.
One of the branches is connected to the discharge side of the circulating pump 12 via a hot water beam solenoid valve 25 and a check valve 26 to form an automatic hot water beam circuit. The other branch is connected to a faucet such as a bath or kitchen. The return pipe 9 and the heat exchanger 1 for heating bath water
Temperature detectors 11, 14, and 23 such as thermistors are attached to the outlet 3 and the outlet of the hot water supply heat exchanger 22, respectively.

In the bath tub cleaning apparatus configured as described above, the cleaning operation and the hot-water removing operation will be described below. Prior to using the bathtub cleaning device 1, the circulation pump 12 is primed. As a method of priming, a method using an automatic hot water beaming function of the bathtub cleaning device 1 and a suction pipe 5e are used.
There is a method of sending water by connecting a hose from a tap.
If this priming is performed only once at the first time, it is not necessary to perform the priming unless the water is drained from the circulation pump 12. When the priming is completed, a small amount of hot water and detergent are put into the bathtub 2 and a remote control (not shown) provided in the kitchen or bathroom is operated to start automatic washing. First, the circulation pump 12 turns and draws a mixed solution of hot water and detergent (hereinafter referred to as a mixed solution) accumulated in the bathtub through the suction pipe 5e, the strainer 5c, and the return pipe 9. At this time, if there is dust in the mixed solution, the dust is collected by the strainer 5c. The pumped liquid mixture is pressurized by a circulation pump 12, passes through a heat exchanger 13 for heating bath water, an outgoing pipe 15, a first switching valve 16, and a cleaning pipe 19, and a rotation hole 20 b of a cleaning nozzle 20 and a cleaning hole. It is spouted into the bathtub more vigorously than 20c, whereby the bathtub is washed while rotating.

According to the second embodiment, the pumped mixture is pressurized by the circulating pump 12 and heated by the heat exchanger 1 for heating bath water.
3, going pipe 15, first switching valve 16, second switching valve 1
7. Rotating hole 20b of cleaning nozzle 20 through cleaning pipe 19
In addition, the tub is spouted vigorously from the cleaning hole 20c into the bath tub, whereby the bath tub is cleaned while rotating.

The collision member 20d provided in the internal space of the rotating part 20a prevents the mixed liquid flowing from the washing pipe 19 from directly hitting the inner surface of the rotating part 20a and not applying a load in the thrust direction. This is because if a load is applied in the thrust direction, the lubricating mixture does not rotate around the bearing portion of the washing nozzle 20, and even if it is initially rotating, the rotation gradually slows down and stops.

Further, the higher the temperature of the mixed solution during washing is, the better the stain removal becomes. Therefore, the temperature is detected by the sensor 11 attached to the return pipe 9, and if the temperature is lower than the first set temperature, the bath water is heated. When the temperature detected by the sensors 11 and 14 exceeds the first set temperature and the second set temperature, respectively, the operation of the bath water heating burner is stopped. I do.

When the washing operation is performed for about 15 to 20 minutes in this way, the dirt on the bathtub is almost completely washed away. Therefore, the first switching valve 16 is switched to the second switching valve 17 side, and the second switching valve 17 is switched. Is switched to communicate with the drain pipe 18 to drain the mixed solution. When drainage is completed, the first switching valve 16 is switched again to the cleaning nozzle 20 side.

According to the second embodiment, after the washing operation for 15 to 20 minutes, the second switching valve 17 is switched to communicate with the drain pipe 18 to drain the mixed liquid. When drainage is completed, the second switching valve 17 is switched again to the cleaning nozzle 20 side.

Next, an automatic hot water filling circuit of the bathtub cleaning device 1
That is, water for rinsing is poured into the bathtub through the hot water supply heat exchanger 22, the hot water supply pipe 24, the hot water filling solenoid valve 25, and the check valve 26, and the circulation pump 12 is operated to wash off the mixture adhering to the circulation circuit and the bathtub 2. . This draining / rinsing operation
After performing the heating twice or more, the hot water is supplied to the set amount by the automatic hot water filling circuit while burning the hot water supply burner. The set amount is determined by a pressure switch (not shown) provided in a part of the circulation circuit or a water amount sensor (not shown) provided in the automatic hot water filling circuit.

Next, the reheating operation will be described. When the automatic hot water filling is completed, the circulation pump 12 is started and the temperature of the hot water in the bathtub 2 is checked by the temperature detection sensor 11. If the temperature is lower than the set temperature, the bath water heating burner is activated and the bath water heating heat exchanger 13 is operated. When the temperature detected by the temperature detection sensor 11 reaches a third set temperature suitable for bathing, the operation of the bath water heating burner is stopped. At this time, the first switching valve 16 switches to the second switching valve 17 side, the second switching valve 17 switches so that the outgoing pipe 15 and the follow-up heating pipe 10 communicate with each other, and the temperature in the bathtub 2 is changed to the third level. Repeat the boiling operation until the set temperature is reached.

According to the second embodiment, at the time of the reheating operation, the first switching valve 16 is switched so that the outgoing pipe 15 and the reheating pipe 10 communicate with each other.

When the strainer 5c is clogged with dust or when the amount of circulation is reduced due to a malfunction of the circulation pump 12, the temperature attached to the outlet of the bath water heating heat exchanger 13 is low although the temperature detected by the temperature detection sensor 11 is low. The detection sensor 14 may become hot. At this time, when the temperature detection sensor 14 reaches the fourth set temperature, the operation of the bath water heating burner is stopped, the operation of the circulation pump 12 is continued, and an alarm operation is performed. This reheating operation can also be performed at an arbitrary timing by operating a reheating switch provided on a remote controller (not shown).

[0025]

As described above, the water heater with a bathtub cleaning function according to the embodiment has the following functions. It has a heat exchanger for bath water heating, a heat exchanger for hot water supply, an automatic hot water filling circuit, a circulation pump, a first switching valve, and a second switching valve. Rinsing, automatic hot water filling, and reheating can be performed automatically with a single switch.

According to the third aspect of the present invention, the single-port circulation port has a substantially double-pipe structure, and the strainer is detachably attached to the inner pipe via a sealing material, so that the strainer is cleaned. Can be easily performed. Since the suction pipe of the one-port circulation port is extended to the vicinity of the bottom of the bathtub, there is no need to provide a pool of water on the bottom of the bathtub, so that a standard bathtub can be used and the existing bathtub can be attached. Furthermore, since L1 is eccentric away from the bathtub side wall and is formed so as to avoid the curved surface portion connecting the side wall and the bottom of the bathtub, it can be located at the lowest surface portion of the bathtub bottom portion, and even if the amount of mixed water is small. It has the effect that it can be pumped. Since the suction pipe of the mouthpiece port is eccentric from the center of the mouthpiece port by L2, there is an effect that the attachment and detachment of the drain plug can be performed without any trouble. The suction pipe at the single-mouth circulation port is slidable in the vertical direction, so when installing the single-mouth circulation port, it is not necessary to strictly position the hole in the bathtub to perform installation work. Since the seal member is attached to the circulating pump, the operation can be stably performed without air entering the circulating pump.

[0027]

As described above, since the water heater with a bathtub cleaning function according to the present invention is constituted, the following excellent effects can be realized. a. Since there is no need to provide a pool on the bottom of the bathtub, the bathtub can be installed in an existing bathtub, and a normal bathtub can be provided with an automatic cleaning function. b. Piping cost can be reduced because only one return pipe is required. c. Since the washing nozzle is provided only on the drain side wall of the bathtub, it does not interfere with bathing.

[Brief description of the drawings]

FIG. 1 is a system diagram showing an entire system including a water heater with a bathtub cleaning function according to an embodiment of the present invention.

FIG. 2 is a system diagram showing an entire system including a water heater with a bathtub cleaning function according to a second embodiment of the present invention.

FIG. 3 is a cross-sectional structural view of a single-circulation port used in Examples.

FIG. 4 a. It is a front view of the bite circulation port used for the Example. b. It is a front view of the bite circulation port used for another Example.

FIG. 5 is a sectional view of a cleaning nozzle used in an example.

FIG. 6 is a front view of a cleaning nozzle used in the example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Hot-water supply device with bathtub washing function 2 Bathtub 3 Drain port 4 Bathtub drain plug 5 Single-circulation port 5a Strainer case 5b Sealing material 5c Strainer 5d Suction port 5e Suction pipe 5f Sealing material 5g Cover 5h Discharge port 5i Screw part 6 Packing 7 Packing One-port circulation port outer case 9 Return pipe 10 Reheating pipe 11 Temperature detection sensor 12 Self-priming circulation pump 13 Heat exchanger for bath water heating 14 Temperature detection sensor 15 Outgoing pipe 16 First switching valve 17 Second switching valve 18 Drainage pipe 19 Cleaning pipe 20 Cleaning nozzle 20a Rotating part 20b Rotation hole 20c Cleaning hole 20d Collision member 21 Water supply pipe 22 Hot water supply heat exchanger 23 Temperature detection sensor 24 Hot water supply pipe 25 Hot water filling electromagnetic valve 26 Check valve 27 Faucet

Claims (3)

[Claims] 1. A bathtub, a mouthpiece circulation port attached to a lower portion of a wall of the bathtub, and a washing nozzle attached to a wall of the bathtub.
In a water heater with a bathtub cleaning function having a circulation pump, a bath water heating heat exchanger, a first switching valve, a second switching valve, a hot water supply heat exchanger, and a hot water beam electromagnetic valve, A circulation pump is provided in the middle of the return pipe connected to the circulation port, a first switching valve is provided in the middle of the going pipe from the circulation pump to the bathtub, and one of the outlets of the first switching valve is connected to the second switching valve. Connected, the other of the outlets of the first switching valve is connected to the washing nozzle through the washing pipe, one of the outlets of the second switching valve is connected to the drain pipe, and the other of the outlet of the second switching valve is connected through the reheating pipe. A water heater with a bathtub cleaning function, which is connected to a single circulation port. 2. A bathtub, a mouthpiece circulation port attached to a lower portion of a wall of the bathtub, and a washing nozzle attached to a wall of the bathtub.
In a water heater with a bathtub cleaning function having a circulation pump, a bath water heating heat exchanger, a first switching valve, a second switching valve, a hot water supply heat exchanger, and a hot water beam electromagnetic valve, A circulation pump is provided in the middle of the return pipe connected to the circulation port, a first switching valve is provided in the middle of the going pipe from the circulation pump to the bathtub, and one of the outlets of the first switching valve is connected to the second switching valve. Connected, the other of the outlets of the first switching valve is connected to the mouthpiece circulation port through a reheating pipe, one of the outlets of the second switching valve is connected to a drain pipe, and the other of the outlet of the second switching valve is connected to a washing pipe. A water heater with a bathtub cleaning function, characterized in that the water heater is connected to a cleaning nozzle through a through hole. 3. A single-circulation port has a double-pipe structure, one of which is a suction side and the other is a discharge side. A strainer case is removably accommodated in a strainer case on the suction side via a sealing material and communicates with the suction port. 3. The water heater with a bathtub cleaning function according to claim 1, wherein a suction pipe is attached to the suction port, and a single-circulation port having a suction pipe extending to near the bottom of the bathtub is used.