JPH0752033B2 - Hot water filling device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a water filling system in which a hot water supply circuit from a hot water supply device is connected to a bath circulation circuit equipped with a heat exchanger for heating hot water in a bathtub. Regarding the device.

[Prior Art] A hot water supply device that supplies hot water supplied from a water heater to a bathtub via a bath circulation circuit for heating the hot water in the bathtub when the hot water is filled When communicating with the circulation circuit and performing reheating such as reheating, it is necessary to separate the bath circulation circuit from the water filling circuit.

For this reason, in such a water filling device, an on-off valve for disconnecting the communication between the hot water supply circuit and the bath circulation circuit is provided in the hot water supply circuit, or the hot water supply circuit as disclosed in JP-A-2-37226. There is a system in which a three-way valve is provided at the connection between the (water supply circuit) and the bath circulation circuit to switch between the bath circulation circuit and the hot water supply circuit.

The filling of water from the hot water supply circuit into the bathtub is performed via the three-way valve and the heat exchanger.

[Problems to be Solved by the Invention] As described above, conventionally, since hot water is supplied to the bathtub through a heat exchanger for reheating having a large flow path resistance, it takes time to fill the hot water. Was there.

On the other hand, in order to shorten the filling time, it is conceivable to supply hot water to the bathtub by using the pipeline on the side where the heat exchanger for reheating is not provided in the bath circulation circuit. , When hot water is supplied from the side where the heat exchanger is not installed, the passage resistance is small, so that the passage speed of hot water becomes faster, the sound of water flow becomes louder, and the pipe that forms the line of the bath circulation circuit is formed. There is a problem of accelerating deterioration such as in-pipe corrosion of the road members.

The present invention relates to a hot water filling device for supplying hot water to a bathtub via a bath circulation circuit, which can quickly supply hot water to the bathtub while reducing water flow noise accompanying the hot water supply. The purpose is to reduce deterioration of road members and the like.

[Means for Solving the Problems] The present invention connects a bathtub, a first pipeline including a heat exchanger for heating hot water in the bathtub, and a second pipeline not including the heat exchanger. And a hot water supply circuit connected to the bath circulation circuit at a connection portion between the first pipeline and the second pipeline, and a three-way valve is provided at the connection portion. In the hot water filling device, the valve body of the three-way valve has a first position where the hot water supply circuit communicates with the first conduit.
A second position in which the hot water supply circuit and the second pipeline are communicated with the first pipeline, and a third position in which the second pipeline is communicated with the first pipeline. The technical means is that the opening area for the second pipeline is set smaller than the opening areas for the first pipeline and the hot water supply circuit at the second position.

[Operation] In the present invention, the valve pair of the three-way valve is at the first position or the second position when the hot water is filled, and at the third position when the hot water in the bathtub is reheated.

When the hot water filling is performed at the first position, the hot and cold water supplied from the hot water supply circuit is sent to the bathtub from the first conduit including the heat exchanger. Here, since the heat exchanger generally has a large flow path resistance, the flow velocity of the hot water supplied to the bath does not become so large.

When the hot water filling is performed at the second position, the hot water supplied from the hot water supply circuit is branched into the first pipe line and the second pipe line by the three-way valve and is supplied to the bathtub.

Here, in the valve body of the three-way valve, the opening area for the second pipeline that does not include the heat exchanger is set to be smaller than the opening area for communicating the hot water supply circuit and the first pipeline. Therefore, the hot water flowing into the second pipeline is restricted by the valve body as compared with the hot water flowing into the first pipeline. However, in the first pipeline, since a heat exchanger having a large flow path resistance is included, a relatively large difference does not occur, and the hot and cold water flowing into each pipeline does not flow into the heat exchanger or the valve body. Each of the openings is restricted and supplied to the bathtub.

Therefore, the flow velocity of the hot water flowing through each pipe does not increase.

[Effect of the Invention] In the present invention, since hot water is supplied to the bathtub from the first pipeline including the heat exchanger and the second pipeline not including the heat exchanger,
The flow path resistance to the bathtub is reduced, and it is possible to quickly fill the bath.

At this time, in the valve body of the three-way valve, the passage amount of the hot water passing through the second pipe that does not include the heat exchanger is limited by the opening that is set to be smaller than the other openings. The flow velocity of the hot and cold water passing through the pipeline is not increased.

Therefore, the water flow noise can be reduced and the pipeline can be protected by reducing the deterioration of the pipeline member and the like.

EXAMPLES Next, the present invention will be described based on examples.

FIG. 1 shows a gas hot water bath system 1 as a water filling device of the present invention.

The gas hot water bath system 1 comprises a hot water supply circuit 10 for heating water supplied from a water supply source such as water supply, and a bath circulation circuit 30 for reheating hot water in the bathtub B.

The hot water supply circuit 10 includes a water pipe type hot water supply heat exchanger 12 for heating water supplied by a water supply source 11 and a water supply pipe 11 which is depressed.
And a bypass pipe 13 for supplying without heating
Are provided so as to branch from the water supply pipe 11, and the hot water supply heat exchanger 12 and the bypass pipe 13 join and are connected to the hot water discharge pipe 14.

The bypass pipe 13 is provided with a bypass solenoid valve 13a that opens and closes as needed.

On the other hand, the hot water outlet pipe 14 is provided with a hot water amount servo 15 for adjusting the flow rate of hot water passing therethrough.
A branch pipe is provided downstream of the pipe to connect a bath filling pipe 16 for filling the bath B with a hot water supply pipe 17 provided with some hot water supply ports (not shown).

The water filling pipe 16 is provided with a water filling valve 18 which is opened and closed by a predetermined control in response to a water filling instruction, and further downstream thereof, a backflow for preventing backflow of water from the bath circulation circuit 30. A prevention device 20 is provided.

The backflow prevention device 20 connects the first check valve 21 and the second check valve 22 in series, and has the atmosphere opening port 24 in the valve chamber 23 in which the valve body 21a of the first check valve 21 is provided. Formed and open to the atmosphere 24
Is reversibly opened and closed with respect to the first check valve 21 by a valve portion 21b which is interlocked with the valve body 21a.

A hopper 25 is provided outside the atmosphere opening port 24 so as to cover the atmosphere opening port 24, and collects hot water flowing out from the atmosphere opening port 24 before the atmosphere opening port 24 is closed by the valve portion 21b, Prevents discharge to the outside.

In the hopper 25, an external guide pipe 26 communicating with the outside is provided so as to project from the bottom into the hopper 25, and a discharge port 25a for discharging the water in the hopper 25 is provided at the bottom, and the discharge port 25a includes A discharge passage 28 is provided which is joined to the downstream side of the second check valve 22 via the electromagnetic valve 27, and the second check valve 22 and the discharge passage are provided.
The water filling pipe 16 is again provided on the downstream side of the confluence with 28, and the water filling pipe 16 is connected to the bath circulation circuit 30 via a three-way valve 40.

The bath circulation circuit 30 includes a forward pipe line 30a through which hot water always passes in the same direction, and a reverse pipe line 30b in which hot water passes in opposite directions during hot water filling and reheating. Bathtub B
It is connected in a closed manner via.

A pump 31 and a bath heat exchanger 32 are provided in the forward pipe line 30a.
The pump 31 is provided in order from the three-way valve 40 side toward the bath B side, and the pump 31 has the three-way valve 40 side as the suction portion 31a and the bath B side as the discharge portion 3a.
A water stream is generated as 1b. On the other hand, the reverse direction pipeline 30b directly connects the three-way valve 40 and the bath B.

As shown in FIG. 2, the three-way valve 40 is a packing that is inserted into the housing 40A having the first port 41, the second port 42, and the third port 43 arranged in a T-shape, on the side of the first port 41. 44, and a ball valve body 46 rotatably supported by a packing 45 inserted on the side of the second port 42 is arranged. The reverse pipe 30b is connected to the first port 41, and the second port The water filling pipe 16 is connected to 42, and the forward pipe line 30a is connected to the third port 43.

The ball valve body 46 is formed with a normally open communication port 46a which is always in communication with the third port 43, and will be described below on a plane perpendicular to the normally open communication port 46a. As you can see, small communication port 46b, 1st communication port 46c, 2nd communication port 46d
Is formed, a shaft 48 driven by a gad motor 47 is provided on the opposite side of the normally open communication port 46a.
It is driven to rotate about a point O in FIG. 3 as a center axis on a line connecting the normally open communication port 46a and the shaft 48.

The small communication port 46b has an inner diameter d as shown in FIG. 2, for example.
1, that is, the opening area is set smaller than the inner diameter d0 of the normally open communication port 46a, that is, the opening area.

The first communication port 46c is formed on the opposite side of the small communication port 46b, and its inner diameter, that is, the opening area is set to be the same as the opening area of the normally open communication port 46a.

As shown in FIGS. 4, 5, and 6, the second communication port 46d is on the same plane as the small communication port 46b and the first communication port 46c, and is perpendicular to the corner communication ports 46b and 46c. And the inner diameter, that is, the opening area, is set to be the same as the opening area of the normally open communication port 46a or the first communication port 46c.

Here, FIG. 4 shows the first position of the ball valve body 46 in the case of one-sided conveyance for filling the bath B from only one of the forward conduits 30a in the bath circulation circuit 30, and FIG. The figure shows the second position for both transports in which both pipes 30a, 30b of the bath circulation circuit 30 are used to fill the bath, and FIG. 6 shows the bath circulation circuit 30 and hot water supply for additional heating. A third position is shown in which the circuit 10 is disconnected and the forward conduit 30a and the reverse conduit 30b are in communication with each other.

In the first position, the normally open communication port 46a and the second communication port 46d allow only the water filling pipe 16 to communicate with the forward direction pipeline 30a. In the second position, the normally open communication port 46a and the first communication port 46a communicate with each other. The pipe 46c and the small communication port 46b connect the forward pipe line 30a to the filling pipe.
16 and the reverse conduit 30b are in communication with each other, and in the third position, the normally open communication port 46a and the second communication port 46d are in communication with the forward conduit 30a and the reverse conduit 30b.

Here, in the first position and the third position where the forward pipe 30a communicates with only one pipe (pipe), the forward pipe 30a communicates with each communication port having the same inner diameter, that is, the same opening area, but the second position. In the above, since the opening area (inner diameter) of the small communication port 46b with respect to the reverse direction pipeline 30b is set smaller than the opening area of the other normally open communication port 46a or the first communication port 46c, When passing the three-way valve 40, the hot water supplied from 16 has a low resistance to the forward direction pipeline 30a and a large resistance to the reverse direction pipeline 30b.

However, here, nothing is provided in the reverse direction pipeline 30b in which the resistance is set large in the three-way valve 40, and in the forward direction pipeline 30a, the pump 31 is provided in the forward direction pipeline 30a. Since the bath heat exchanger 32 is provided, the resistance in the pipeline is large.

Therefore, in the second position, when the resistance of each of the forward conduit 30a and the reverse conduit 30b is considered to be the total resistance including the three-way valve 40, the resistance of each conduit is large. No difference,
Compared to the one-sided conveyance in which hot water is appropriately divided into each pipe and supplied to the bathtub B, and the forward pipe 30a alone is used for filling water, the hot water supply flow rate can be significantly increased without increasing the water flow sound or flow velocity. Can be increased.

As a result, it is possible to protect the conduit members that form the conduits of the bath circulation circuit 30, and reduce the deterioration of the conduit members.

The position of each position of the ball valve element 46 is detected by a position sensor (not shown) corresponding to each position.

In FIG. 1, 33a, 33b and 33c are thermistors and 3
4a and 34b are flow rate sensors, and 35 is a water flow switch.

In addition, the heat exchangers 12 and 32 respectively include blowers 12a and 32a.
Burners 12A, 32A to which combustion air is supplied are provided, and the fuel supply passage 12b is provided with a governor proportional valve 36 and small solenoid valves 37, 37a for adjusting the fuel amount for the burner 12A.
The burner 32A is equipped with a bath solenoid valve 3
8 and a governor 38a are provided, and in addition, a former solenoid valve 39 is provided.

Each of the burners 12A and 32A is also provided with an ignition electrode and a frame rod for flame detection, which are not shown.

The gas hot water bath system 1 having the above configuration is controlled by the control device 50.

The control device 50 controls the combustion state of each burner 12A, 32A and each circuit of the hot water supply circuit 10 and the bath circulation circuit 30 according to the operating state of the remote controller 51 and the detection state of each thermistor, etc. Only the control relating to the filling operation will be described.

When the target water filling amount is set by the remote controller 51 and the water filling is instructed, the three-way valve 40 selects the second position and connects the water filling pipe 16 to the forward pipe line 30a and the reverse pipe line 30b. Open the water filling valve 18 together.

In the hot water supply circuit 10, the water supplied from the water supply pipe 11 is heated by the hot water supply heat exchanger 12, and hot water is filled with the hot water valve 18 and the backflow prevention device 20.
And it passes through the three-way valve 40 and flows into the bath circulation circuit 30.

At this time, in the backflow prevention device 20, the solenoid valve 27 is closed, and a part of the inflowing warm water is discharged from the atmosphere opening port 24 to the hopper 25.
Flows out to and accumulates in the hopper 25.

Further, in the bath circulation circuit 30, the warm water is supplied to the bathtub B by being divided into the forward pipe line 30a and the backward pipe line 30b.

At this time, there is no reverse pipe 30 provided in the pipe.
Since the small communication port 46b of the ball valve body 46 is located at the first port 41 to which b is connected, the flow rate of the hot and cold water flowing into the reverse direction pipeline 30b is limited.

The hot water flowing into the forward pipe 30a receives resistance by the pump 31 and the bath heat exchanger 32 provided in the pipe.

Therefore, the hot water supplied from the water filling pipe 16 is appropriately divided into the forward pipe line 30a and the backward pipe line 30b and then supplied to the bathtub B, so that the force of the water flow is weakened and the water flow noise is reduced. Therefore, the pipeline member forming the pipeline can be protected, deterioration can be reduced, and the resistance of the entire pipeline to the bath B can be reduced, so that a large amount of hot water can be supplied.

When the integrated value of the flow rate detected by the flow rate sensor 34b reaches the target amount of water filling, the water filling valve 18 is closed to finish the water filling.

After that, the three-way valve 40 is switched to the first position so that only the water filling pipe 16 and the forward pipe line 30a are communicated with each other and the pump 31
When water is driven, the water remaining in the valve chamber 23 upstream of the second check valve 22 of the check valve 20 is sucked out by opening the second check valve 22 by the suction force of the pump 31.

Also, a few seconds after the driving of the pump 31 is started (for example, 2 seconds)
Then, when the solenoid valve 27 is opened, the water in the hopper 25 is sucked out and sent to the bath B.

When the water in the backflow prevention device 20 is collected, the three-way valve 40
The hot water pipe 16 and the bath circulation circuit 30 are cut off from each other, the forward pipe line 30a and the reverse pipe line 30b are made to communicate with each other, and heat retention control is performed to perform appropriate heating.

As described above, in the present invention, when the hot water is filled, the hot water supplied from the hot water supply circuit 10 to the bath circulation circuit 30 is switched to the third position, and the forward pipe line 30a and the backward pipe line 30b are connected to the bathtub B. Since it is supplied to, it is possible to increase the flow rate at which the flow path resistance becomes small, and to shorten the filling time.

Further, after the filling with water is completed, the water in the backflow prevention device 20 can be reliably recovered by using the suction force of the pump 31.

Therefore, the water filling can be performed without being affected by freezing.

Further, since the hot water supply circuit 10 and the bath circulation circuit 30 are connected via the three-way valve 40, the structure is simple and the cost is low.

In the present embodiment, the hopper 25 of the backflow prevention device 20 is provided with the solenoid valve 27, but a check valve may be provided instead of the solenoid valve.

Although the water level sensor for detecting the water level in the bathtub B is not provided in the present embodiment, a water level sensor may be provided between the three-way valve 40 and the bathtub B in the reverse pipe 30b.

In this case, the water level sensor uses a semiconductor diffusion resistance type pressure sensing element that uses the piezoresistive effect in which the electrical resistance changes according to the strain of the semiconductor single crystal, and connects it to the reverse direction conduit 30b. After pumping the warm water in the bathtub B by the pump 31, the communication between the reverse direction pipeline 30b and the forward direction pipeline 30a is cut off to detect the water level.

Further, in order to protect the water level sensor, at the beginning of the filling process, the filling pipe 16 and the forward direction pipeline 30a are communicated with each other, and the bathtub B
After filling water from only one side of the bath circulation circuit 30, after that, if the water filling pipe 16 and the forward direction pipeline 30a and the reverse direction pipeline 30b are switched so as to communicate with each other, the water level It is possible to protect the sensor without applying an excessive load, and it is possible to quickly fill the required water level.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a gas hot water bath system showing an embodiment of the present invention, FIG. 2 is a sectional view showing a three-way valve of the present embodiment,
FIG. 3 is an M view of FIG. 2, and FIGS. 4 to 6 are position diagrams of the ball valve element for explaining the communication state between the ports in the three-way valve of the present embodiment. In the figure, 1 ... Gas hot water bath system (water filling device), 10
...... Hot water supply circuit, 30 …… Bath circulation circuit, 30a …… Forward pipeline (first pipeline), 30b …… Reverse pipeline (second pipeline), 32 …… Bath heat exchanger ( Heat exchanger), 40 ... 3-way valve, 46 ... Ball valve body (B), B ... Bathtub.

Claims (1)

[Claims] 1. A bathtub, a first conduit including a heat exchanger for heating hot water in the bathtub, and a second pipe not including the heat exchanger.
And a hot water supply circuit connected to the bath circulation circuit at the connecting portion between the first and second pipelines, and the connection portion has three sides. In the hot water filling device provided with a valve, the valve body of the three-way valve has a first position for communicating the hot water supply circuit with the first pipeline, the hot water supply circuit with respect to the first pipeline, and A second communicating together with the second conduit
A position, and a third position for communicating the second conduit with the first conduit, and in the second position, the opening area for the second conduit is the first conduit. A hot water filling device characterized by being set smaller than an opening area for a passage and the hot water supply circuit.