JPH04371752A - Forced circulation type automatic hot water feeding bath device - Google Patents

Abstract

PURPOSE:To provide an automatic hot water feeding bath device having a simplified structure of low price and a superior performance. CONSTITUTION:A circulation circuit is comprised of an additional boiling return pipe extending from a connection port of the additional boiling return pipe to an additional boiling heat exchanger 4 and an additional boiling pipe 8 communicating from the additional boiling heat exchanger 4 to a connection port 7 of an additional boiling going pipe. A hot water circulation pump 9 is arranged at the additional boiling return pipe 6, an automatic hot water supplying pipe 10 is connected to an additional boiling going pipe 8 at a downstream side of the hot water circulation pump 9. A check valve 11 is disposed between the hot water circulation pump 9 and the connection port 5 of the additional boiling return pipe. Further, a pressure sensor 12 is disposed between its check valve 11 and the connection port 5 of the additional boiling return pipe. The check valve 11 is of a structure not sealingly closed when it is closed.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improved forced circulation automatic hot water bath system.

0002

2. Description of the Related Art Conventionally, as shown in FIG.
A device main body 33 having a bath pot 32 is installed between the two,
There was a natural convection type that reheated the fire. However, although this bath device is inexpensive, the installation location is restricted, and it cannot be adopted when the appliance body 33 is desired to be installed at a location away from the bathtub 30 due to the structure of the building or the user's request. Therefore, in such a case, as shown in FIG. 5, a forced circulation type automatic hot water supply bath device that reheats and automatically supplies hot water to a certain distance from the bathtub 40 has been used.

0003

[Problems to be Solved by the Invention] However, the above-mentioned forced circulation type automatic hot water supply bath device has to ensure its reheating performance and hot water supply performance even if it is installed at a location away from the bathtub 40. The process became complicated, and material and construction costs increased, making it expensive. For example, when supplying hot water to the bathtub 40, in order to reduce pressure loss up to the bathtub 40, hot water is supplied to the bathtub 40 from both the reheating outgoing pipe 41 and the reheating return pipe 42, and the water level is detected by the pressure sensor 43. When doing so, the piping flow path on the side where the pressure sensor 43 was provided was configured to be closed by the electromagnetic valve 44.

However, in places where it is impossible to install a natural convection type bath, even in cases where a forced circulation type automatic hot water supply bath device can be installed slightly away from the bathtub 40,
Such complicated and expensive bath equipment is used,
This resulted in excessive equipment and was extremely uneconomical. In addition, depending on the installation location, it is possible to install a natural convection type adjacent to the bath, but if you are not satisfied with the natural convection type because hot water easily accumulates and the performance is inferior, then a forced circulation type automatic hot water bath that can be installed remotely is recommended. equipment was used. in this way,
In the past, it was not possible to flexibly select a bath system according to the constraints of the installation location or the user's requests, and the user had no choice but to use an expensive forced circulation type automatic hot water supply bath system.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a forced circulation type automatic hot water supply bath apparatus having a simple structure, low cost, and sufficient performance.

[0006]

[Means for Solving the Problems] In order to solve the above problems, the forced circulation automatic hot water bath device of the present invention includes a reheating return pipe connected from a reheating return pipe connection port to a reheating heat exchanger; A circulation circuit is formed by the reheating and forwarding pipes connected from the reheating heat exchanger to the reheating and forwarding pipe connection port, a circulation pump is provided in the reheating return pipe, and an automatic hot water supply system is installed in the circulation circuit downstream of the circulation pump. In a forced circulation automatic hot water bath device which is formed by connecting an automatic hot water supply pipe of a heat exchanger, a check valve is provided between the circulation pump and the reheating return pipe connection port, and the check valve and the reheating return pipe are connected to each other. A pressure sensor was installed between the combustion return pipe connection port and the construction. In addition, the automatic hot water supply pipe is connected to a reheating pipe, and the check valve is structured so that it does not become airtight when closed.

[0007]

[Operation] When hot water heated by the automatic hot water supply heat exchanger begins to be supplied from the automatic hot water supply pipe to the circulation circuit, the check valve closes.
Hot water is automatically supplied to the bathtub from the circulation circuit. Since the check valve prevents the flow to the reheating return pipe downstream of the check valve, the flow in the pipe from the check valve to the bathtub becomes stationary, so the pressure sensor accurately detects the pressure of the bathtub water level. . When reheating the bathtub after hot water has been supplied, the bathtub water is sucked into the reheating return pipe from the reheating return pipe connection port by the circulation pump, the check valve is opened, and the water is reheated via the reheating return pipe downstream of the check valve. Sent to heat exchanger. Then, the hot water heated by the reheating heat exchanger is supplied to the bathtub from the reheating pipe connection port via the reheating pipe. In this way, the bathtub water is heated and gradually raised in temperature while circulating in the circulation circuit.

[0008] In addition, in the case where an automatic hot water supply pipe is connected to the reheating pipe, hot water is supplied directly from the reheating pipe to the bathtub without passing through the reheating heat exchanger, so it is necessary to connect the automatic hot water supply pipe to the reheating return pipe. The pressure loss due to the reheating heat exchanger is reduced compared to the conventional heat exchanger. In addition, a check valve with a structure that does not enter a sealed state when blocked is designed to purge the air mixed in the hot water in the reheating return pipe upstream of the check valve during automatic hot water supply with a structure that does not enter a sealed state when blocked. The sensor detects the pressure of the bath water level more accurately.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the accompanying drawings. Figure 1 is a schematic configuration diagram of a forced circulation automatic hot water supply bath device, in which 1 is a bathtub, 2 is an automatic hot water supply heat exchanger,
3 is a reheating device, and 4 is a reheating heat exchanger. Inside the reheating device 3, there is a reheating return pipe 6 connected from the reheating return pipe connection port 5 to the reheating heat exchanger 4, and a reheating return pipe 6 connected from the reheating heat exchanger 4 to the reheating forward pipe connection port 7. A circulation circuit is formed with the outgoing pipe 8.

The reheating return pipe 6 is provided with a general-purpose hot water circulation pump 9 as a circulation pump, and the reheating return pipe 8 is provided with an automatic hot water supply pipe 10 that supplies hot water from the automatic hot water heat exchanger 2. is connected. A check valve 11 is provided between the hot water circulation pump 9 and the reheating return pipe connection port 5, and a pressure sensor 12 is further provided between the check valve 11 and the reheating return pipe connection port 5. ing.

Further, the bathtub 1 and the reheating device 3 are arranged adjacent to each other across the wall 13 of the building, and the reheating return pipe connection port 5, the reheating forward pipe connection port 7 and the bath adapter 1a of the bathtub 1 are connected to each other. A short flexible double-tube bus adapter connection hose 14 is connected through the wall hole 13a.

In this way, the automatic hot water supply pipe 10 is connected to the reheating pipe 8, and hot water is automatically supplied to the bathtub 1 from the reheating pipe connection port 7 through the reheating pipe 8, so that automatic hot water supply is possible. Compared to the case where the supply pipe 10 is connected to the reheating return pipe 5, pressure loss due to the reheating heat exchanger 4 is reduced. Then, a general-purpose hot water circulation pump 9 and a check valve 1
1, compared to self-contained pumps and solenoid valves used in conventional remote-installed forced circulation automatic hot water bath equipment, both have a simpler structure and are cheaper, and therefore can be installed adjacently to allow for easy piping. Coupled with the simplification of the above, it is possible to reduce the cost of the entire device.

Next, the structure of the check valve 11, which does not enter a sealed state when closed, will be explained with reference to FIG. That is, inside the housing 20, a partition wall 22 having a valve hole 21 and a valve guide 23 are provided, an annular inflow orifice 24 is bored in the valve guide 23, and a check valve 25 is provided in the center of the valve guide 23. is inserted. The check valve 25 is always urged toward the partition wall 22 by a coil spring 26 to close the valve hole 21. An air bleed hole 27 is formed in the peripheral wall of the valve hole 21 so that the check valve 25 does not enter a sealed state when closed.

The forced circulation type automatic hot water bath system constructed as described above operates and is used as follows. That is,
The reheating device 3 is installed very close to the bathtub 1 with a wall 13 in between. Then, the hot water heated by the automatic hot water supply heat exchanger 2 is reheated through the automatic hot water supply pipe 10 and sent to the reheating pipe 8.
When water starts to be supplied, the check valve 11 closes, and hot water is automatically supplied to the bathtub 1 from the reheating pipe 8 through the reheating pipe connection port 7, the bath adapter connection hose 14, the bath adapter 1a, etc. During that time, the check valve 11 closes and blocks the flow through the reheating outflow pipe 8, the reheating heat exchanger 4, the reheating return pipe 6, the hot water circulation pump 9, and the check valve 11. , the flow in the pipe from the check valve 11 to the bathtub 1 becomes stationary. Therefore, the pressure sensor 12 provided closer to the bathtub 1 than the check valve 11 can accurately detect the pressure of the bathtub water level, and can easily and appropriately control the amount of water in the bathtub.

When the check valve 11 is provided with an air vent hole 27, when automatic hot water supply from the reheating return pipe 7 to the bathtub 1 is started, hot water is mixed with the hot water on the reheating return pipe 6 side. Air is purged from the air vent hole 27. Therefore,
The pressure sensor 12 can detect the pressure of the bathtub water level more accurately. In particular, as shown in Figure 3, when the piping 14' to the reheating return pipe connection port 5 is a torii piping, air tends to accumulate at the top of the torii piping, and a check valve without an air vent hole Water level H cannot be detected accurately. In such a case, if the check valve 11 with the air vent hole 27 as described above is used, a portion of the automatic hot water supply hot water will flow downstream of the check valve 11 of the reheating return pipe 6 at a rate of about 1 to 2 liters/min. Since it flows, it is air purged. However, if the flow rate is too large, the pressure loss in the reheating return pipe 6 will increase and the pressure detection will become inaccurate, so it is desirable to flow a small amount such that the pipe pressure loss is several mmH2O.

After hot water has been supplied to the bathtub 1 by the above-described action, when reheating is performed as necessary, when the hot water circulation pump 9 is operated, the bathtub water is returned to the reheating return pipe via the bath adapter 1a and the bath adapter connection hose 14. It is sucked into the reheating return pipe 6 from the connection port 5, and the check valve 11 is opened and the reheating heat exchanger 4 passes through the reheating return pipe 6 downstream of the check valve 11.
sent to. Then, it is heated in the reheating heat exchanger 4,
The heated hot water is sent to the reheating pipe connection port 7 via the reheating pipe 8, and then to the bus adapter connection hose 14.
, hot water is supplied to the bathtub 1 via the bath adapter 1a. In this way, the bathtub water is heated and gradually raised in temperature while circulating in the circulation circuit.

[0017] In the above embodiment, the structure of the check valve provided with the air vent hole is merely an example, and the present invention is not limited thereto. The shape, dimensions, etc. may be changed as appropriate within a range that does not deviate from the above.

[0018]

[Effects of the Invention] As detailed above, the forced circulation automatic hot water bath device of the present invention includes a check valve between the circulation pump on the reheating return pipe and the reheating return pipe connection port, and further includes: Since a pressure sensor is provided between the check valve and the reheating return pipe connection port, the structure is simplified and inexpensive, and the pressure of the bathtub water level can be accurately detected. Furthermore, by connecting the automatic hot water supply pipe to the reheating pipe, pressure loss due to the reheating heat exchanger can be eliminated. Furthermore, by using a check valve that does not enter a sealed state when closed, the pressure of the water level in the bathtub can be detected even more accurately. Therefore, it is possible to reduce costs by simplifying the configuration while maintaining sufficient performance, and it is also possible to flexibly select a bathing device according to installation location restrictions and user requests.

[Brief explanation of the drawing]

FIG. 1 is a system configuration diagram of an embodiment of the present invention.

FIG. 2 is an explanatory diagram showing the structure of a check valve having an air vent hole.

FIG. 3 is an explanatory diagram of the main parts of a bath device with torii piping.

FIG. 4 is an explanatory diagram of a conventional adjacent natural convection bath device.

FIG. 5 is a system configuration diagram of a conventional remote reheating type forced circulation bath device.

[Explanation of symbols]

2. Automatic hot water supply heat exchanger, 4. Reheating heat exchanger, 5
... Reheating return pipe connection port, 6 ... Reheating return pipe, 7
・・Reheating pipe connection port, 8・・Reheating pipe, 9
・・Hot water circulation pump, 10・・Automatic hot water supply pipe, 11・
・Check valve, 12..Pressure sensor, 27..Air vent hole.

Claims (3)

[Claims] Claim 1: A circulation circuit is formed by a reheating return pipe connected from the reheating return pipe connection port to the reheating heat exchanger, and a reheating return pipe connected from the reheating heat exchanger to the reheating outgoing pipe connection port. and a forced circulation automatic hot water supply bath device comprising: a circulation pump provided in the reheating return pipe; and an automatic hot water supply pipe of an automatic hot water heat exchanger connected to a circulation circuit downstream of the circulation pump; A forced circulation automatic hot water bath characterized in that a check valve is provided between the reheating return pipe connection port and the reheating return pipe connection port, and a pressure sensor is further provided between the check valve and the reheating return pipe connection port. Device. 2. The forced circulation automatic hot water bath apparatus according to claim 1, wherein the automatic hot water supply pipe is connected to a reheating pipe. 3. The forced circulation automatic hot water bath apparatus according to claim 1, wherein the check valve is a check valve having a structure that does not enter a sealed state when the check valve is closed.