JP2555856B2 - Bath equipment - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bathtub device, and more particularly to a bath device in which hot water from a water heater can be dropped into a bathtub to supply hot water by utilizing a reheating circulation path.

[0002]

2. Description of the Related Art FIG. 2 shows a configuration example of a conventional bath device.
Reference numeral 10 is a bathtub, and a bath return pipe 21 and a bathing pipe 22 are provided from the bathtub 10.
The reheating circulation path 20 consisting of is a heating can body 30 for reheating.
Is circulating. The bath return pipe 21 has a circulation pump 41,
Bath water level sensor 42, water flow switch 43, bath temperature sensor 44
Etc. are provided. The water in the bathtub 10 is circulated and heated from the bath return pipe 21 to the heating can body 30 for reheating by driving the circulation pump 41, and returned to the bathtub 10 through the bath outflow pipe 22 to be reheated. 50 is an automatic bath drop water supply pipe, and 51 is an automatic bath drop water supply pipe. The bath automatic drop water supply pipe 50 is extended from a water source (not shown) such as a water supply through a water heater (not shown), or the bath automatic drop water supply pipe 51 is also extended from a water source (not shown) such as a water supply without passing through the water heater. Has been done. The bath automatic drop hot water supply pipe 50 and the bath automatic drop water supply pipe 51 are connected to the connecting pipe 60 via the drop open / close valves 52 and 53, respectively.
The connection pipe 60 is connected to the bath return pipe 21 via the three-way switching valve 45. In order to prevent backflow to the connection pipe 60 from the reheating circulation path 20 side to the bath automatic drop hot water supply pipe 50 and the bath automatic drop water supply pipe 51 side through the connection pipe 60,
An overflow chamber 70 is provided. A check valve 61 is also provided. 62 is a pressure relief valve. An overflow port 71 is provided in the overflow chamber 70, and a drain pipe 73 is connected to the connecting pipe 60 at a lower portion thereof via a drain valve 72.

Hot water dropping into the bathtub 10 is switched so that the three-way switching valve 45 is connected to the connecting pipe 60, and the drop opening / closing valve 52 is opened to pass through the bath automatic dropping hot water supply pipe 50. It enters the connection pipe 60, further enters the bath return pipe 21, and is introduced into the bathtub 10 through the bath reheating circulation path 20. Then, when draining the water accumulated in the overflow chamber 70, the three-way switching valve 45 is switched so that the connecting pipe 60 and the return pipe 21 are connected, and the drain valve 72 of the overflow chamber 70 is opened. By driving the circulation pump 41, the water in the overflow chamber 70 is guided from the drainage pipe 73 to the connection pipe 60 and the bath return pipe 21, and the circulation pump 41 moves the heating can body 30 for reheating to the bathing pipe. 22 to bathtub 10
I try to drain it inside.

[0004]

However, in the above-mentioned conventional bath device, when the residual water in the overflow chamber 70 is drained, air is reheated and circulated from the overflow chamber 70 along with the drainage from the overflow chamber 70. Since it is caught in the passage 20 and especially in the circulation pump 41, after that, when performing the air purge circulation of the reheating circulation passage 20 or driving the circulation pump 41 in other cases, the self-priming of the circulation pump 41 is performed. There was a drawback that the noise during the period was large.

In view of the above, the present invention solves the above-mentioned drawbacks of the prior art and uses a reheating circulation path to allow hot water to be dropped into a bathtub to supply hot water. An object of the present invention is to provide a bath device that prevents air from being caught in a circulation pump in a reheating circulation path when draining water and thereby prevents noise from being generated when the circulation pump is driven.

[0006]

To achieve the above object, the bath device of the present invention comprises a bath return pipe 21 connected from the bathtub 10 to a reheating heating can body 30 and a reheating heating can body 30. The bath return pipe 2 has a reheating circulation path 20 composed of a bath passage pipe 22 connected to the bathtub 10 .
The circulating pump 41 provided in 1 allows the bath water to be circulated to the heating can body 30 for reheating to perform reheating, and the bath automatically drops from the water heater to supply hot water.
50 is dropped in and the bath return pipe 2 is opened and closed via the on-off valve 52.
1 is connected to the bathtub 10 , and the overflow chamber 7 is connected to the connection pipe 60 from the drop opening / closing valve 52 to the bath return pipe 21.
0 is provided to prevent the backflow from the reheating circulation path 20 side, which is the overflow chamber 7
The drain pipe 73 from 0 is used for the circulation pump 41 and reheating
By connecting to the negative pressure generating portion of the venturi portion 23 formed in the bath outflow pipe 22 located downstream of the heating can body 30 and driving the circulation pump 41 when draining the overflow chamber 70 , the overflow is generated. The water in the chamber 70 is supplied to
Wind that is further downstream than the pump 41 and the heating can body for reheating
It is characterized in that the venturi portion 23 of the outlet pipe 22 is sucked and drained into the bath 10 together with the circulating water.

[0007]

According to the above feature of the present invention, when the water accumulated in the overflow chamber is drained, the circulation pump of the bath return pipe is driven, so that the bath water is returned to the bath return pipe,
It is circulated through a heating can body for reheating and a bath outlet pipe.
Due to this circulation, a negative pressure is generated in the venturi portion formed in the bath outflow pipe which is located sufficiently downstream of the circulation pump. Therefore, the residual water in the overflow chamber is sucked into the bath outflow pipe through the drain pipe connected to the negative pressure generating portion of the venturi portion, and is introduced into the bathtub together with the circulating water. That is, the residual water in the overflow chamber is directly sucked into the bath outflow pipe and discharged into the bath without passing through the circulation pump or the bath return pipe. Therefore, even if the residual water in the overflow chamber is discharged, air will not be caught in the bath return pipe or the circulation pump from the overflow chamber, and noise will be prevented from occurring due to air mixing when driving the circulation pump thereafter. it can.

[0008]

1 is a block diagram showing an embodiment of a bath device according to the present invention.

Reference numeral 10 denotes a bathtub, and a reheating circulation path 20 composed of a bath return pipe 21 and a bath outflow pipe 22 circulates from the bathtub 10 to a reheating heating can body 30. The bath return pipe 21 is provided with a circulation pump 41, a bath water level sensor 42, a water flow switch 43, a bath temperature sensor 44 and the like. The water in the bathtub 10 is circulated and heated from the bath return pipe 21 to the reheating heating can body 30 by the drive of the circulation pump 41, and is heated through the bath outflow pipe 22 to the bathtub.
Reheating is done by returning to 10. 50 is an automatic bath drop water supply pipe, and 51 is an automatic bath drop water supply pipe. The bath automatic drop water supply pipe 50 is extended from a water source (not shown) such as a water supply through a water heater (not shown), or the bath automatic drop water supply pipe 51 is also extended from a water source (not shown) such as a water supply without passing through the water heater. Has been done.
The bath automatic drop hot water supply pipe 50 and the bath automatic drop water supply pipe 51 are connected to the connection pipe 60 via the drop opening / closing valves 52 and 53, respectively, and the connection pipe 60 is connected to the bath return pipe 21 via the three-way switching valve 45. ing. The connection pipe 60 is provided with an overflow chamber 70 for preventing backflow from the reheating circulation path 20 side to the bath automatic drop hot water supply pipe 50 and the bath automatic drop water supply pipe 51 side through the connection pipe 60. There is.
A check valve 61 is also provided. 62 is a pressure relief valve. The overflow chamber 70 is provided with an overflow port 71, and a drainage pipe 73 is provided in the lower portion through a drainage valve 72, which is the same as the above-mentioned conventional device.

In the apparatus of the present invention, the overflow chamber
Venturi part 23 in which 70 drainage pipes 73 were constructed as bath outflow pipes 22
It is directly connected to the negative pressure generation part. The venturi portion 23 of the bath outflow pipe 22 is configured such that the passage in the pipe 22 has a constricted shape, and a negative pressure is generated on the upstream side of the constricted portion due to the water flow. By connecting the drainage pipe 73 to this negative pressure generating part, the water in the drainage pipe 73 is sucked, and the bath outflow pipe 22
Pour into. During drainage of residual water in the overflow chamber 70, the opening / closing valve 25 of the bypass pipe 24 is closed so that the entire amount of circulating water passes through the venturi section 23 to improve suction efficiency. The drain pipe 73 is provided with a check valve 74.

Reference numeral 80 is a controller, which has a built-in microcomputer,
In each operation such as hot water supply operation, automatic hot water supply operation, automatic drop water supply operation, reheating operation, etc., a command from the remote controller 90 is received, information from sensors of each part of the device is received, and a predetermined control operation is performed. Command each part.
When circulatingly heating the bath water, the controller 80 switches the three-way switching valve 45 so that the bath return pipes 21 are connected to each other, and drives the circulation pump 41. As a result, the bath water passes through the reheating circulation path 20 and the heating can body for reheating is added.
Heated at 30. When dropping hot water into the bathtub 10, or when dropping water, the controller 80 is a three-way valve.
45 switches so that the connection pipe 60 and the bath return pipe 21 are connected to each other, and opens the drop opening / closing valve 52 or 53. As a result, hot water or water enters the connection pipe 60 through the bath automatic drop hot water supply pipe 50 and the bath automatic drop water supply pipe 51, further enters the bath return pipe 21, and passes through the bath reheating circulation path 20 to the bathtub 10. be introduced. Pipe 5 directly connected to the water supply at this time
In the case of hot water supply or water supply from 0, 51, since the water pressure is high, the water is dropped into the bath without driving the circulation pump 41. In the above-mentioned case, when it is dropped into the bathtub by one-sided conveyance, it is introduced into the bathtub 10 from the bath return pipe 21 through the heating can body 30 for reheating and the bathing pipe 22. Further, the opening / closing valve 25 of the bypass pipe 24 is opened so that the bypass pipe 24 is also introduced through the bypass pipe 24. On the other hand, in the case of both transports, the valve for both transports
By opening 46, the hot water introduced into the bath return pipe 21 is introduced into the bathtub from the bath return pipe 22 as well as the bath return pipe 21.

Then, when draining the water accumulated in the overflow chamber 70, the controller 80 switches the three-way switching valve 45 so that the connection pipe 60 and the bath return pipe 21 are connected, and The drain valve 72 is opened, the on-off valve 25 of the bypass pipe 24 is closed, and the circulation pump 41 is driven. As a result, the bath water circulates in the reheating circulation path 20 and a negative pressure state is formed in the venturi portion 23 of the bath outflow pipe 22. The water in the overflow chamber 70 reaches the venturi part 23 of the bath outflow pipe 22 through the drain pipe 73, and is sucked into the bath outflow pipe 22 by the negative pressure of the venturi part 23, and is tub together with the circulating water. Drain inside. That is, the residual water in the overflow chamber 70 is drained to the bath without passing through the circulation pump 41. Therefore, of course, the air brought together with the residual water from the overflow chamber 70 is also not caught in the circulation pump 41. The drainage of the overflow chamber 70 is necessary to avoid the inconvenience of freezing residual water, especially in winter.

[0013]

According to the bath apparatus of the present invention, the negative pressure generating portion of the venturi portion in which the drain pipe from the overflow chamber is constructed as the bath outlet pipe is provided. When the drainage of the overflow chamber is performed, the circulation pump is driven so that the water in the overflow chamber is sucked by the venturi portion and drained into the bath together with the circulating water. It is possible to prevent air from being caught in the circulation pump when draining water, and thus to prevent generation of large noise due to driving of the circulation pump in which air is involved.

[Brief description of drawings]

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

FIG. 2 is a diagram showing a configuration example of a conventional bath device.

[Explanation of symbols]

 10 Bathtub 20 Reheating circuit 21 Bath return pipe 22 Bath returning pipe 23 Venturi section 30 Heating can body for reheating 41 Circulation pump 50 Automatic bath drop water supply pipe 52 Drop opening / closing valve 60 Connection pipe 70 Overflow chamber 73 Drain pipe

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP-A-2-37226 (JP, A) JP-A-5-87410 (JP, A) JP-A-3-291456 (JP, A)

Claims (1)

(57) [Claims] 1. A bath return pipe 21 and, bath outward forward pipe 22. consisting Reheating circulation path 20 connected from the fired heating can body 30 to follow the tub 10 connected to the fired heating can body 30 to follow from the bath 10 And a heating can body 30 for reheating the bath water with the circulation pump 41 provided in the bath return pipe 21.
It dropped into the circulation as well as so-fired can be carried out chase with, to the bathtub 10 by via an on-off valve 52 darken the bath automatic darken hot water supply pipe 50 from the water heater is connected to the bath return pipe 21 to In addition, the overflow chamber 70 is provided in the connection pipe 60 from the drop opening / closing valve 52 to the bath return pipe 21 to prevent the backflow from the reheating circulation path 20 side. The drain pipe 73 from the overflow chamber 70 is connected to the circulation pump 41 or a heating can body for reheating.
Connected to the negative pressure generating portion of the venturi section 23 configured in a bath forward pipe 22 located downstream from 30, the time of drainage of overflow chamber 70 by driving the circulation pump 41, overflow chamber 70 The water of the circulation pump 41
Bath outlet pipe that is further downstream than the heating can body for reheating
Venturi part 23 of 22 sucks and circulates water together with bathtub 1
A bath device characterized in that it is configured to drain into 0 .