JPH0484066A - Hot water feeding device - Google Patents

Abstract

PURPOSE:To perform a fast feeding of hot water into a bath tub and reduce a water flowing sound by a method wherein a valve body of a three-way valve has the first position, the second position and the third position, respectively and at the second position, an opening area against the second pipe passage is set smaller than opening areas for the first pipe passage and a hot water feeding circuit. CONSTITUTION:At the first position, a ball valve body 46 is communicated with only a hot water feeding pipe 16 in respect to a forward pipe passage 30a. At the second position, the hot water feeding pipe 16 and an inverse direction pipe passage 30b are communicated to each other in respect to the forward direction pipe passage 30a. At the third position, the forward direction pipe passage 30a and the inverse direction pipe passage 30b are communicated to each other. At the second position, an opening area of a small communication port 46b in respect to the inverse direction pipe passage 30b is small in respect to a normal opened communication port 46a and the first communication port 46c, resulting in that the hot water supplied from the hot water feeding pipe 16 has a low resistance in the forward direction pipe passage 30a, and inturn it shows a high resistance at the inverse direction pipe passage 30. Since the forward direction pipe passage 30a is provided with a pump 31 and a bath heat exchanger 32, there is no difference in resistance in each of the pipe passages and further the hot water is properly branched and supplied to the bath tub B, resulting in that a flow rate of fed hot water can be increased.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a hot water supply system in which a hot water supply circuit from a water heater is connected to a bath circulation circuit equipped with a heat exchanger for heating hot water in a bathtub. Regarding equipment.

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

For this reason, in such hot water filling devices, some are provided with an on-off valve in the hot water supply circuit to cut off communication between the hot water supply circuit and the bath circulation circuit, and others are equipped with a hot water supply circuit as in the invention of JP-A No. 2-37226. Some devices have a three-way valve installed at the connection between the water supply circuit (water supply circuit) and the bath circulation circuit to switch between the bath circulation circuit and the hot water supply circuit.

The bathtub is filled with hot water from the hot water supply circuit via a three-way valve and a heat exchanger.

[Problems to be Solved by the Invention] Conventionally, hot water is supplied to a bathtub through a reheating heat exchanger that has a large flow resistance, so it takes a long time to fill the bathtub. I used to be.

On the other hand, in order to shorten the hot water filling time, it is possible to supply hot water to the bathtub using the pipe line on the side of the bath circulation circuit where a heat exchanger for reheating etc. is not installed. If hot water is supplied from the pipe on the side where the heat exchanger is not installed, the passage speed of the hot water will be faster because the flow resistance is smaller, and the water flow noise will be louder. There is a problem in that it accelerates deterioration such as corrosion inside the pipes and the like.

The present invention provides a hot water filling device that supplies hot water to a bathtub via a bath circulation circuit. The purpose is to reduce deterioration of road members, etc.

[Means for Solving the Problems] The present invention provides a method for connecting a bathtub, a first pipe line including a heat exchanger for heating hot water in the bathtub, and a second pipe line not including the heat exchanger. and a hot water supply circuit connected to the bath circulation circuit at a connection part between the first pipe line and the second pipe line, and a three-way valve is provided at the connection part. In the hot water filling device, the valve body of the three-way valve is located at a “first” position where the hot water supply circuit communicates with the first pipe line;
a second position in which both the hot water supply circuit and the second conduit are communicated with the first conduit; and a third position in which the second conduit is communicated with the first conduit. and in the second position, the opening area for the second pipe line is set to be smaller than the opening area for the first pipe line and the hot water supply circuit.

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

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

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

Here, the valve body of the three-way valve is set so that the opening area for the second pipeline that does not include the heat exchanger is smaller than the opening area for communicating the hot water supply circuit and the first pipeline. Therefore, the hot water flowing into the second pipe is restricted by the valve body compared to the hot water flowing into the first pipe. However, the first
Since these pipes include heat exchangers with large flow resistance, there is no relative difference between them, and hot water flowing into each pipe is restricted by the heat exchanger or the opening of the valve body. and supplied to the bathtub.

Therefore, the flow rate of hot water passing through each pipe does not increase.

[Effects of the Invention] In the present invention, since hot water is supplied to the bathtub from the first pipe line including the heat exchanger and the second pipe line not including the heat exchanger,
The flow path resistance to the bathtub is reduced, and hot water can be quickly filled.

At this time, the amount of hot water passing through the second pipe line that does not include a heat exchanger is limited by the opening set smaller than other openings in the valve body of the three-way valve. The flow rate of hot water passing through the pipes does not increase.

Therefore, water flow noise can be reduced, and deterioration of pipe line members and the like can be reduced to protect the pipe line.

[Example] Next, the present invention will be explained based on examples.

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

The gas hot water bath system 1 includes a hot water supply circuit 10 that heats water supplied from a water supply source such as a water supply, and a bath circulation circuit 30 that reheats the hot water in the bathtub B.

The hot water supply circuit 10 includes a wood pipe hot water heat exchanger 12 for heating water supplied by a water supply pipe 11 connected to a water supply source, and a bypass pipe 13 for supplying water as it is without heating. It is provided branching off from the pipe 11,
The hot water heat exchanger 12 and the bypass pipe 13 merge and are connected to a hot water outlet pipe 14.

Note that the bypass pipe 13 is equipped with a bypass solenoid valve 13a that is opened and closed as necessary.

On the other hand, the hot water outlet pipe 14 is equipped with a hot water flow rate servo 15 for adjusting the flow rate of hot water passing therethrough. The tension pipe 16 is connected to a hot water supply pipe 17 provided with several hot water supply ports (not shown).

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

The backflow prevention bag W20 has a first check valve 21 and a second check valve 22.
are connected in series, and the valve body 2 of the first check valve 21
An atmosphere opening port 24 is formed in the valve chamber 23 in which the valve chamber 1a is provided, and the atmosphere opening port 24 is reversibly opened and closed with respect to the first check valve 21 by a valve portion 21b interlocking with the valve body 21a.

Further, a hopper 25 is provided outside the atmosphere opening 24 so as to cover the atmosphere opening 24, and stores hot water flowing out from the atmosphere opening 24 before the atmosphere opening 24 is closed by the valve portion 21b. Prevent it from being discharged to the outside.

The hopper 25 is provided with an external guide pipe 26 projecting from the bottom into the hopper 25 that communicates with the outside, and a discharge port 25a for discharging water in the hopper 25 is provided at the bottom. , a discharge i28 is provided which merges with the downstream side of the second check valve 22 via the electromagnetic valve 27, and the downstream side of the junction between the second check valve 22 and the discharge path 28 is connected to the hot water filling pipe 16 again. The hot water filling pipe 16 has a three-way valve 40.
It is connected to the bath circulation circuit 30 via.

The bath circulation circuit 30 has a forward pipe 30a through which hot water always passes in the same direction, and a reverse pipe 830b through which the hot water passes in the opposite direction when reheating and when reheating the bath, and the three-way valve 40 and the bathtub. They are connected in a closed manner via B.

A pump 31 and a bath heat exchanger 32 are installed in the forward pipe line 30a.
are provided in order from the three-way valve 40 side to the bathtub B side, and the pump 31 generates water flow with the three-way valve 40 side as a suction part 31a and the bathtub B side as a discharge part 31b. On the other hand, the reverse pipe line 30b directly connects the three-way valve 40 and the bathtub B.

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

A normally open communication port 46a that is always in communication with the third boat 43 is formed in the ball valve body 46, and a normally open communication port 46a, which will be described below, is formed on a plane perpendicular to the normally open communication port 46a. As shown, the small communication port 46b, the first communication hole 46c,
A second communication port 46d is formed, and a normally open communication port 46a is formed.
A shaft 48 driven by a geared motor 47 is provided on the opposite side of the shaft 48, and the center axis is a line connecting the normally open communication port 46a and the shaft 48, and the point O in FIG.
It is driven to rotate around the center.

For example, as shown in FIG. 2, the small communication port 46b has an inner diameter d1, that is, an opening area equal to the inner diameter dO of the normally open communication port 46a.
That is, it is set small compared to the opening area.

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

As shown in FIGS. 4, 5, and 6, the second communication hole 46d is located on the same plane as the small communication hole 46b and the first communication hole 46C, and in a direction perpendicular to each communication hole 46b, 46c. 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 hole 46c.

Here, FIG. 4 shows the first position of the ball valve body 46 in the case of one-way conveyance for filling hot water from only one forward pipe line 30a in the bath circulation circuit 30 to the bathtub B. The figure shows the second position for both conveying hot water filling using both pipes 30a and 30b of the bath circulation circuit 30, and FIG. The circuit 10 is cut off, and the forward conduit 30a and the reverse conduit 30 are disconnected.
Fig. 3 shows a third position where b are in communication with each other.

In the first position, only the hot water filling pipe 16 is in communication with the forward pipeline 30a through the normally open communication port 46a and the second communication hole 46d, and in the second position, the normally open communication port 46a and the first communication port 46d are in communication with each other. The hot water filling pipe 16 and the reverse pipe line 30b are in communication with each other with respect to the forward pipe line 30a by the b 46c and the small communication port 46b, and in the third position, the normally open communication port 46a and the second communication port 46d As a result, the forward pipe line 30a and the reverse pipe line 30b are brought into communication.

Here, in the first position and the third position where the forward direction pipe line 30a communicates with only one pipe (pipe line), each communication port has the same inner diameter, that is, the same opening area, but in the second position In this case, the opening area (inner diameter) of the small communication port 46b with respect to the reverse direction pipe 30b is set smaller than the opening area of the other normally open communication port 46a or the first communication hole 46c. When the hot water supplied from 16 passes through the three-way valve 40, the resistance to the forward direction pipe 30a becomes small, and the resistance to the reverse direction pipe 30b decreases.
There will be greater resistance to.

However, here, the reverse pipe line 30b, which has a large resistance in the three-way valve 40, is not provided with anything between it and the bathtub B, whereas the forward pipe line 30a has a pump 31. Since the bath heat exchanger 32 and the bath heat exchanger 32 are provided, the resistance inside the pipe is large.

Therefore, in the second position, if the resistance of each of the forward direction pipe line 30a and the reverse direction pipe line 30b is considered as the overall resistance including the three-way valve 40, the resistance of each pipe line is large. There is no difference, hot water is appropriately divided into each pipe and supplied to the bathtub B, and hot water is supplied without increasing water flow noise or speed compared to single conveyance in which hot water is filled only through the forward pipe 30a. The flow rate can be increased significantly.

As a result, the pipe members forming each pipe of the bath circulation circuit 30 can be protected, and deterioration of the pipe members can be reduced.

Note that the position state of each position of the ball valve body 46 is detected by a position sensor (not shown) corresponding to each position.

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

Each heat exchanger 12.32 also has a blower 12.
burner 12 supplied with combustion air by a, 32a;
A, 32A are provided, and the fuel supply path 12b is provided with a governor proportional valve 36 and a small solenoid valve 37.37a for adjusting the combustion amount for the burner 12A. is equipped with a bath solenoid valve 38 and a governor 38a, and is also provided with a main solenoid valve 39.

Each burner 12A, 32A is also provided with an ignition electrode and a flame rod (not shown) for flame detection.

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

The control device 50 controls each burner 12A, 32A according to the operation state of the remote controller 51 and the detection state of each thermistor, etc.
The combustion state and each circuit of the hot water supply circuit 10 and the bath circulation circuit 30 are controlled, but only the control during the hot water filling operation will be explained here.

When the target water filling amount is set by the remote controller 51 and hot water filling is instructed, the three-way valve 40 selects the second position and closes the hot water filling pipe 16, forward pipe line 30a, and reverse pipe line 3.
0b and open the hot water filling valve 18.

In the hot water supply circuit 10 , water supplied from the water supply pipe 11 is heated in the hot water supply heat exchanger 12 , and the hot water passes through the hot water filling valve 18 , the backflow prevention device 20 and the three-way valve 40 and then flows into the bath circulation circuit 3 .
Flows into 0.

At this time, in the backflow prevention device 20, the solenoid valve 27 is closed, and a portion of the inflowing hot water flows out from the atmosphere opening 24 to the hopper 25 and accumulates in the hopper 25.

Further, in the bath circulation circuit 30, hot water is supplied to the forward direction pipe 30a.
and the reverse pipe line 30b, and are supplied to the bathtub B.

At this time, the reverse pipe line 3 where nothing is installed inside the pipe line
A ball valve body 46 is connected to the first boat 41 to which 0b is connected.
Since the small communication port 46b is located, the flow rate of hot water flowing into the reverse direction pipe 30b is restricted.

Moreover, the hot water flowing into the forward direction pipe 30a is resisted by the pump 31 and the bath heat exchanger 32 provided in the pipe.

For this reason, the hot water supplied from the hot water filling pipe 16 is appropriately divided into the forward direction pipe 30a and the reverse direction pipe 30b and supplied to the bathtub B, so the force of the water flow is weakened and the water flow noise is reduced. Therefore, the conduit members forming the conduit can be protected and deterioration can be reduced, and the resistance of the entire conduit to the bathtub B is reduced, so 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 water filling amount, the hot water filling valve 18 is closed and the hot water filling is completed.

Thereafter, when the three-way valve 40 is switched to the first position and the pump 31 is driven by communicating only the hot water filling pipe 16 and the forward direction pipe 30a, the valve chamber upstream of the second check valve 22 of the backflow prevention device 20 The water remaining in the tank 23 is sucked out by opening the second check valve 22 by the suction force of the pump 31.

Also, several seconds after the pump 31 starts driving (for example, 2 seconds)
When the solenoid valve 27 is opened, the water in the hopper 25 is sucked out and sent to the bathtub B.

When the water in the backflow prevention device 20 has been recovered, the three-way valve 40
cuts off the communication between the hot water filling pipe 16 and the bath circulation circuit 30,
The forward direction pipe line 30a and the reverse direction pipe line 30b are communicated with each other, and the process moves to heat retention control in which additional heating is performed as appropriate.

As described above, in the present invention, when filling hot water, 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 hot water is switched between the forward direction pipe 30a and the reverse direction pipe 30.
Since the water is supplied to the bathtub B from the bathtub B, the flow path resistance is reduced, the flow rate can be increased, and the time required for filling the bathtub can be shortened.

After filling the water, the water in the backflow prevention device 20 can be reliably recovered using the suction force of the pump 31.

Therefore, hot water can be filled without being affected by freezing.

In addition, the hot water supply circuit 10 and the bath circulation circuit 30 are connected to each other by a three-way valve 40.
The structure is simple and inexpensive because the connection is made through the .

In this embodiment, the hopper 25 of the backflow prevention device 20 is shown as being equipped with the solenoid valve 27, but it may be equipped with a check valve instead of the solenoid valve.

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

In that case, the water level sensor uses a semiconductor diffusion resistance type pressure sensing element that utilizes a piezoresistance effect whose electrical resistance changes according to the strain of a semiconductor single crystal, and communicates it with the reverse conduit 30b. After pumping hot water from the bathtub B by the pump 31, the water level is detected by cutting off communication between the reverse pipe 30b and the forward pipe 30a.

In addition, in order to protect the water level sensor, at the beginning of filling, the hot water filling pipe 16 and the forward direction pipe 30a are communicated, and the bathtub B is filled from only one side of the bath circulation circuit 30. From then on, the hot water filling pipe] 6 and the forward direction pipe 30a
By switching the water level sensor so that the water level sensor and the reverse pipe line 30b are all in communication with each other, it is possible to protect the water level sensor from being subjected to excessive load, and to quickly fill the water level to the required water level.

[Brief explanation of drawings]

FIG. 1 is a schematic configuration diagram of a gas hot water bath system showing an embodiment of the present invention, and FIG. 2 is a sectional view showing a three-way valve of the present embodiment.
FIG. 3 is a master view of FIG. 2, and FIGS. 4 to 6 are positional views of the ball valve body for explaining the communication state between the boats in the three-way valve of this embodiment. In the figure, 1... gas hot water bath system (hot water filling device),
10...Hot water supply circuit, 30...Bath circulation circuit, 30a
... Forward pipe line (first pipe line), 30b... Reverse pipe line (second pipe line), 32... Bath heat exchanger (heat exchanger), 40... Three sides Valve, 46...ball valve body), B...bathtub.

Claims (1)

[Scope of Claims] 1) Bath circulation formed by connecting a bathtub, a first pipe line including a heat exchanger for heating hot water in the bathtub, and a second pipe line not including the heat exchanger. A hot water filling device comprising a circuit and a hot water supply circuit connected to the bath circulation circuit at a connecting portion between the first pipe line and the second pipe line, and a three-way valve is provided at the connecting portion, The valve body of the three-way valve has a first position where the hot water supply circuit communicates with the first pipe line, and a first position where the hot water supply circuit and the second pipe line communicate with the first pipe line. Second
position, and a third position where the second pipe line communicates with the first pipe line, and in the second position, the opening area for the second pipe line is smaller than that of the first pipe line. A hot water filling device characterized in that the opening area is set to be smaller than the opening area for the channel and the hot water supply circuit.