JPH0788978B2 - Water supply - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a water supply device such as a water supply device for sending water into a water tank or a water filling device for sending hot water into a bathtub.

[Prior Art] For example, in Japanese Patent Application Laid-Open No. 3-291457 (filed on April 4, 1990), as shown in FIG. 2, water flowing from a water source is heated by a hot water heater 101. A hot water supply passage 103 for sending hot water into the bathtub 102, a backflow prevention mechanism 104 for preventing hot water in the bathtub 102 from flowing backward to the clean water side, and a gas passage 105 for supplying fuel gas to the hot water supply heater 101 were provided. Automatic water filling device 100
Is proposed.

For example, when the bathtub 102 is installed at a high place with respect to the automatic water filling device 100 and the water level is high as in the case where the bathtub 102 is installed on the second floor, when the water filling of the bathtub 102 is completed, the water level of the bathtub 102 is completed. The water filling valve 106 is closed in a state in which high water pressure caused by is applied to the check valve 108, the pressure chamber 109, and the like via the reheating heater 107. Therefore, after the filling of the bathtub 102 is completed, the inside of the pressure chamber 109 on the upstream side of the atmosphere release valve 110 is maintained at a high water pressure.

As a result, due to the high water pressure, the atmosphere release valve 110 is maintained in the closed state while the bath 102 is being filled with water, and the pressure chamber 109 is kept closed.
The inside is in a state where water has accumulated.

Normally, in this state, the electric pump 111 is operated to feed the water in the pressure chamber 109 into the bathtub 102 through the hot water supply passage 103, but at this time, the pressure in the pressure chamber 109 is reduced,
The air release valve 110 opens due to the elastic force of the spring 112.

As a result, the atmosphere supply path 113, the communication chamber 114, the atmosphere opening hole 115.
By entering the atmosphere into the pressure chamber 109 via
The edge of the bathtub 102 side and the clean water side are cut off.

[Problems to be Solved by the Invention] In the prior art, the check valve 108 is provided between the confluence point 117 where the discharge passage 116 and the hot water supply passage 103 meet and the pressure chamber 109, and is in a closed state. In order to open the check valve 108 and reduce the pressure in the pressure chamber 109, it is necessary to operate a separately provided suction means (electric pump or the like).
There was a problem that the structure became complicated. In addition, if there is a power failure or a break in the wire immediately after the filling is completed, the electric pump 111 cannot pump the water in the pressure chamber 109 to the bath 102. Therefore, the pressure chamber 109 is kept at a high water pressure forever, so that the atmosphere release valve 110 is not opened, and the water remains in the pressure chamber 109. As a result, there is a problem that the edge between the pressure chamber 109 and the water source side becomes insufficient.

It is an object of the invention according to claim 1 to provide water supply capable of reliably cutting the water tank side, the water source side and the outside by a simple method even when the water tank is installed at a position higher than the pressure chamber. To provide a device.

An object of the invention described in claim 2 is to provide a water supply device capable of surely performing rim cutting between the water tank side, the water source side and the outside by a simple method even when a power failure or a wire break occurs immediately after sending water to the water tank. To provide.

[Means for Solving the Problem] The invention according to claim 1 has a pressure chamber in which an atmosphere opening hole is formed in a wall, and a water supply passage for sending water from a water source into a water tank, and a pressure in the pressure chamber. An atmosphere opening valve that opens and closes the atmosphere opening hole by acting, and a communication chamber that communicates with the pressure chamber through the atmosphere opening hole,
An atmosphere supply path for sending the atmosphere into the communication chamber, and a hopper having a discharge path for returning water flowing into the communication chamber to the water supply path; an on-off valve provided in the discharge path for opening and closing the discharge path; The technical means including a check valve provided on the water tank side with respect to the confluence of the water supply passage and the discharge passage to prevent the reverse flow of water in the water tank is adopted.

The invention according to claim 2 is characterized in that, in addition to the water supply device according to claim 1, the on-off valve is a normally open solenoid valve that opens the discharge passage when energization is stopped. .

[Operation] According to the invention described in claim 1, when the feeding of water from the water source to the inside of the water tank is completed, when the water tank is arranged at a position higher than the pressure chamber, a high water pressure due to the water level of the water tank is generated. In addition to the pressure chamber, the pressure chamber is maintained at a high water pressure, the atmosphere release valve remains closed, and water is accumulated in the pressure chamber. At this time, the check valve is also kept closed.

Then, in order to collect the water remaining in the pressure chamber, the check valve is opened on the side of the water tank from the confluence point of the water supply passage and the discharge path by opening the discharge path of the hopper by the opening / closing valve. While preventing backflow, air supply channel, communication chamber,
The pressure chamber is opened to the atmosphere through the discharge passage and the water supply passage.

For this reason, the pressure in the pressure chamber drops from the high water pressure state due to the water level in the water tank, so the atmosphere release valve opens the atmosphere release hole, and the atmosphere is released into the pressure chamber through the atmosphere supply passage, the communication chamber, and the atmosphere release hole. When entering, the edge of the aquarium side and the water source side is cut off.

According to the second aspect of the invention, the check valve opens the discharge passage of the hopper by the normally open solenoid valve even when a power failure or a wire break occurs immediately after the water is sent from the water source into the water tank, so that the check valve is provided with the water supply passage. The pressure chamber is opened to the atmosphere through the atmosphere supply passage, the communication chamber, the discharge furnace, and the water supply passage while preventing the backflow from the water tank because it is provided on the water tank side from the confluence of the discharge passage and the discharge passage.

For this reason, the pressure in the pressure chamber drops from the high water pressure state caused by the water level in the water tank, so the atmosphere opening valve opens the atmosphere opening hole, and the atmosphere supply path, the communication chamber, and the atmosphere opening hole open the atmosphere to the thick chamber. When the water enters, the rim of the aquarium side and the water source side is cut off.

[Effect of the Invention] In the invention described in claim 1, even when the water tank is installed at a position higher than the pressure chamber, the edge of the water tank, the water source side, and the outside are surely cut off by a simple method. be able to.

In the invention according to claim 2, immediately after the water is sent to the aquarium,
Even in the event of a power failure or disconnection, the water tank side can be reliably cut off from the water source side and the outside by a simple method.

[Embodiment] A water supply apparatus of the present invention will be described based on an embodiment shown in FIG.

FIG. 1 is a view showing an automatic water filling device adopting the present invention.

The automatic water filling device 1 is the water supply device of the present invention, for example, the water supplied from the water supply (water source) and the water in the bathtub 4 are heated by the hot water supply heater 2 and the reheating heater 3 to make the bathtub. 4, a hot water supply passage 5 and a gas passage 6 for supplying a fuel gas to the hot water supply heater 2 and the reheating heater 3. The automatic water filling device 1 is arranged, for example, on the first floor of a house or the like.

The hot water heater 2 built in this automatic water filling device 1
It has a hot water supply heat exchanger 7 which is a part of the hot water supply passage 5, and a gas burner 8 which heats water passing through the hot water supply heat exchanger 7.

Similarly, an additional heating heater 3 built in the automatic water filling device 1
Has a reheating heat exchanger 9 that is a part of the hot water supply passage 5, and a gas burner 10 that heats the water in the bathtub 4 that passes through the reheating heat exchanger 9.

The bathtub 4 is the water tank of the present invention and is arranged at a position where the water level is higher than that of the automatic water filling device 1, for example, on the second floor of a house or the like.

The hot water supply passage 5 is the water supply passage of the present invention, and has a reheating circulation circuit 11 in addition to the hot water supply heat exchanger 7 and the reheating heat exchanger 9 described above. In addition, the hot water supply passage 5 has a hot water filling valve.
12, various solenoid valves 13, a water level sensor 14, a water flow switch 15, an electric pump 16, a backflow prevention mechanism 17 and the like are provided.

The water filling valve 12 opens and closes the hot water supply passage 5 in response to a water filling instruction from a control device (not shown) and a signal such as completion of the water filling.

The water level sensor 14 detects the water level of the bathtub 4, converts the detected pressure and the like into an electric signal and sends it to the control device.

The water flow switch 15 sends an electric signal to the control device when there is a water flow in the hot water supply passage 5.

When the electric pump 16 is energized by the controller, the electric pump 16 circulates water or hot water in the bathtub 4 using the reheating circulation circuit 11 via the reheating heat exchanger 9.

The backflow prevention mechanism 17 includes a pressure chamber 18, a first check valve 19, a hopper.
20, atmosphere release valve 21, normally open solenoid valve 22 and second check valve 23
Equipped with.

The pressure chamber 18 constitutes a part of the hot water supply passage 5, and an atmosphere opening hole 24 is formed in a partition wall with the hopper 20.

The first check valve 19 is provided in the pressure chamber 18, and is connected to the atmosphere opening / closing valve 21.
Displaces in the pressure chamber 18 in conjunction with. When the first check valve 19 is closed by the elastic force of the spring 28, it blocks the flow of water from the foot of the pressure chamber 18 toward the water filling valve 12 (water supply) side.

The hopper 20 includes a communication chamber 25 that communicates with the pressure chamber 18 through an atmosphere opening hole 24, and an atmosphere supply path that projects from the bottom wall into the communication chamber 25.
26, and a discharge path 27 extending downward from the bottom wall.

The atmosphere opening valve 21 closes the atmosphere opening hole 24 against the elastic force of the spring 28 when the pressure inside the pressure chamber 18 becomes high.

The normally open solenoid valve 22 is the on-off valve of the present invention, and when the controller is energized during the operation of filling the bathtub 4, the discharge passage 27 is opened.
When the filling of the bathtub 4 is completed and the energization is stopped, the discharge passage 27 is opened.

The second check valve 23 is a check valve of the present invention, and is a discharge valve 27 for the hot water supply passage 5 downstream of the pressure chamber 18 (bath 4) and the hopper 20.
It is provided on the downstream side (tub 4) side of the confluence point 29 with and on the upstream side (water supply) of the electric pump 16. This second
The check valve 23 opens by overcoming the elastic force of the spring 30 when water or hot water flows from the confluence 29 toward the bathtub 4. Further, the second check valve 23 is closed by the elastic force of the spring 30 to prevent water or hot water from flowing from the bathtub 4 toward the upstream side.

The operation of the automatic water filling device 1 will be described with reference to FIG.

The water filling valve 12 opens when water filling is instructed from the control device,
A water flow is generated in the hot water supply passage 5, and fuel gas is further supplied to the gas burner 8 of the hot water supply heater 2. The water supplied from the water supply is heated by the combustion heat of the gas burner 8 when passing through the hot water supply heat exchanger 7.

And the hot water is filled with the hot water 12, the first check valve 19, the pressure chamber 18,
It is sent into the bathtub 4 through the confluence point 29, the second check valve 23, the electric pump 16 and the reheating heat exchanger 9 of the reheating heater 3.

Then, when the water level in the bathtub 4 reaches a predetermined water level, the water filling valve 12 is closed and the water filling in the bathtub 4 is completed.

When the water level of the bathtub 4 is higher than that of the water filling device 1, a high water pressure due to the water level in the bathtub 4 is applied to the pressure 18, so that the pressure chamber 18 is maintained at a high water pressure. As a result, tensioning is completed under high water pressure and the water filling valve 12 closes,
The atmosphere release valve 21 is maintained in the closed state while the bath 4 is being filled with water, and the pressure chamber 18 is filled with water. At this time, the second check valve 23 is closed due to the high water pressure resulting from the water level in the bathtub 4.

Then, in order to collect the water remaining in the pressure chamber 18, the normally open solenoid valve 22 is opened. At this time, since the second check valve 23 is provided closer to the bathtub 4 side than the confluence point 29, backflow from the bathtub 4 side is prevented, and the pressure chamber 18 has an atmosphere supply path.
It is opened to the atmosphere through 26, the communication chamber 25, and the discharge path 27.

As a result, the pressure in the pressure chamber 18 decreases from the high water pressure state caused by the water level in the bathtub 4, so the atmosphere release valve 21 is opened by the elastic force of the spring 28 and the atmosphere release hole 24 is opened to open the pressure chamber. Atmosphere enters inside 18. Therefore, the water supply side and the bathtub 4
The atmosphere is interposed between the water supply side and the water supply side, so that the water supply side and the bathtub 4 side are cut off. It should be noted that the water replaced with the atmosphere and accumulated in the communication chamber 25 through the atmosphere opening hole 24 is forcibly sent into the bathtub 4 by the suction force of the electric pump 16.

By the way, since the normally open solenoid valve 22 is a solenoid valve that opens even when the power supply is stopped even if a power failure or a wire break occurs immediately after the bathtub 4 is filled with the hot water, the valve is opened at the same time when the power supply is stopped. Then, the discharge path 27 is opened. Therefore, similarly to the above, the atmosphere is present between the water supply side and the bathtub 4 side, and the edge of the bathtub 4 side and the water supply side is surely cut off.

As described above, in the present embodiment, the edge of the bathtub 4 side and the water supply side can be cut off easily by a simple method, and moreover, even when a power failure or a wire break occurs immediately after the filling of the bathtub 4 with hot water is completed.

(Modification) In the present embodiment, the present invention is used in an automatic water filling device, but the present invention may be used in a water supply device that does not have a heating means for heating water.

In this embodiment, a normally open solenoid valve is used as the on-off valve,
Unless a power failure or disconnection is considered, a manual on-off valve or a normally closed solenoid valve may be used as the on-off valve.

In this embodiment, various solenoid valves and the like are provided in the hot water supply passage and the gas passage, but the number can be increased or decreased without departing from the scope of the present invention.

[Brief description of drawings]

FIG. 1 is a schematic view showing an automatic water filling device adopting the present invention. FIG. 2 is a schematic diagram showing the prior art. In the figure 1 …… Automatic hot water filling device (water supply device) 4 …… Bathtub (water tank) 5 …… Hot water supply passage (water supply passage) 18 …… Pressure chamber 20 …… Hopper 21 …… Atmosphere release valve 22 …… Normally open type Solenoid valve (open / close valve) 23 …… Second check valve (check valve) 24 …… Atmosphere opening hole 25 …… Communication chamber 26 …… Atmosphere supply path 27 …… Discharge path

Claims (2)

[Claims] 1. A water supply passage for feeding water from a water source into a water tank, comprising: (a) a pressure chamber having an atmosphere opening hole formed in a wall; and (b) a pressure in the pressure chamber acts to release the atmosphere. An atmosphere opening valve that opens and closes a hole; (c) a communication chamber that communicates with the pressure chamber through the atmosphere opening hole; an atmosphere supply path that sends the atmosphere into the communication chamber; and water that flows into the communication chamber. A hopper having a discharge passage returning to the passage; (d) an opening / closing valve provided in the discharge passage for opening and closing the discharge passage; and (e) provided on the water tank side from a confluence of the water supply passage and the discharge passage. And a check valve for preventing backflow of water in the water tank. 2. The water supply device according to claim 1, wherein the on-off valve is a normally open solenoid valve that opens the discharge passage when the energization is stopped.