JP2004044836A - Hot water pouring device to apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a hot water pouring device for certainly preventing soiled water from flowing backward to a waterworks pipe even when a cut in water supply or the like occurs in a damaged state of a function of a check valve. <P>SOLUTION: The hot water pouring device has a backflow preventing device 13 disposed on the downstream side of a hot water pouring valve or a water pouring valve and on the upstream side of a mixing part of the remaining hot water. The backflow preventing device has an atmosphere open valve 30 opened or closed based on a pressure difference when water pressure in the backflow preventing device is increased by an after boiling phenomenon and becomes higher than a water supply pressure. The backflow preventing device 13 prevents the soiled water from flowing backward to the water pipe. The atmosphere open valve 30 is opened for a moment when the water pressure in the backflow preventing device is increased by the after boiling phenomenon or the like of a water heater and becomes higher than the water supply pressure, can prevent fixing of the valve, and can certainly prevent backflow. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a device for pouring water, hot water from a water heater, remaining hot water in a bathtub, and the like into equipment for supplying a washing machine, a washing device, an air conditioner, and the like.
[0002]
[Prior art]
Conventionally, as shown in FIG. 5, this type of pouring device is connected to the outside or inside of a water heater 12 capable of hot water supply and circulating heating of bathtub water to supply water to equipment 8 such as a washing machine. Valve 1, pouring valve 2 for supplying hot water to equipment 8, flow path switching valve 4 for switching the flow path for supplying remaining hot water 10 in bathtub 9 to equipment 8 or bathtub 9, and water flow to equipment 8 Water detection means 5 for detecting the presence or absence of water, a remote controller 3 for selecting a water supply mode for the equipment 8, a water injection valve 1, a water injection valve 2, a flow path switching valve 4, a water flow detection means 5, and a connected hot water supply The control device 7 controls the device 12 to operate in each mode selected by the remote controller 3. 11 is a circulation pump.
[0003]
When the device 8 is a washing machine, washing and rinsing are automatically determined, and at the time of washing, one of water, hot water, and remaining hot water 10 is supplied to the device 8 in accordance with the mode selected by the remote controller 3 to perform rinsing. In some cases, water is supplied.
[0004]
[Problems to be solved by the invention]
Then, in order to prevent the supply side of tap water from becoming negative pressure or the like due to water cutoff and the like, and the remaining hot water 10 in the bathtub 9 flows back into the water pipe, a check valve 6 (for safety) as shown in FIG. ), Which is a two-piece configuration. However, if the check valve 6 is clogged with dust or the like, the function of the check valve 6 is hindered, and there is a problem that water may flow backward. For this reason, if the supply side of tap water becomes negative pressure due to water cutoff, etc., it is conceivable to respond by opening a separately provided valve. However, water cutoff is rare (for example, water is cut off only once every several years). Case) If the separately provided valve is always in the closed state, the valve may stick to the valve seat with the lapse of time, and the non-return prevention function may not work in the event of an emergency operation.
[0005]
The present invention has been made to solve the above-mentioned conventional problems, and reliably prevents dirty water from flowing back into a water pipe even in the case where water is cut off in a state where the function of a check valve is inhibited. It is an object of the present invention to provide a device for pouring water into equipment.
[0006]
[Means for Solving the Invention]
In order to achieve the above object, a device for pouring water into a device according to the present invention includes a portion downstream of a portion where hot water from a pouring valve and tap water from a pouring valve are mixed, and a portion where the remaining hot water is mixed. A backflow prevention device is arranged on the upstream side of the backflow prevention device, and when the water pressure in the backflow prevention device rises due to the after-boiling phenomenon and becomes higher than the water supply pressure of the water injection valve, the backflow prevention device opens and closes due to the pressure difference. It has an atmosphere release valve.
[0007]
In this way, even in the case where water is cut off in a state where the function of the check valve is obstructed, the backflow prevention device prevents the dirty water from flowing back into the water pipe, and the air release valve is provided for the water heater. It is opened and closed when the water pressure in the backflow prevention device becomes higher than the water supply pressure of the water injection valve due to the rise in water pressure in the backflow prevention device due to the after-boiling phenomenon.
[0008]
BEST MODE FOR CARRYING OUT THE INVENTION
The invention according to claim 1 is a pouring valve that supplies hot water, a pouring valve that supplies tap water, a flow path switching valve that switches a flow path for supplying remaining hot water in a bathtub to an apparatus or a bathtub, A backflow prevention device disposed downstream of at least one of the injection valve and the injection valve and upstream of a portion where the remaining hot water is mixed, wherein the backflow prevention device is provided inside the backflow prevention device due to a post-boil phenomenon. When the water pressure rises and becomes higher than the water supply pressure of the water injection valve or the water injection valve, the function of the check valve is provided by using a device for pouring water into an apparatus having an atmosphere opening valve that opens and closes due to the pressure difference. In the case where water is cut off in a state where water is interrupted, the backflow prevention device prevents the contaminated water from flowing back into the water pipe, and the air release valve is provided with a backflow prevention device due to the after-boiling phenomenon of the water heater. Water pressure of water injection valve Ri is opened and closed when a high, can prevent sticking of the valve, in which it is reliable reverse blocking.
[0009]
According to a second aspect of the present invention, there is provided a pressure receiving portion for supplying water pressure of a water injection valve or a pouring valve and a pressure receiving portion for pressure of water passing through a backflow prevention device, and a pressure receiving portion for water pressure in a backflow prevention device and an atmospheric pressure. A diaphragm is provided between the pressure receiving portion and each of the diaphragms, an atmosphere release valve is positioned between the diaphragms and the diaphragm, and the atmosphere release valve is connected. The water pressure receiving area of the diaphragm on the side is made smaller than the water pressure receiving area in the backflow prevention device of the air release valve. When the pressure of the water in the backflow prevention device rises, the air release valve surely responds to the pressure rise.
[0010]
The invention according to claim 3 is the apparatus according to claim 2, wherein the pressure receiving area of the diaphragm on the pressure receiving portion side of the water supply pressure of the water injection valve or the hot water supply valve is larger than the pressure receiving area in the backflow prevention device of the air release valve. By using the hot water pouring device, pressure fluctuations due to water cutoff or the like can be immediately transmitted as a force for opening the atmosphere release valve, and the response is assured.
[0011]
According to a fourth aspect of the present invention, a backflow prevention device is provided at a position immediately downstream of a water injection valve, and the device is a device for pouring water to a device according to any one of the first to third aspects. The valve and the backflow prevention device can be integrated, resulting in a simpler configuration.
[0012]
【Example】
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0013]
(Example 1)
FIG. 1 shows a device for pouring water into equipment according to Embodiment 1 of the present invention. In the overall configuration, the same parts as those of the conventional example are denoted by the same reference numerals, description thereof will be omitted, and different points will be mainly described.
[0014]
In the figure, reference numeral 13 denotes a backflow prevention device arranged downstream of a portion where tap water from the water injection valve 1 and hot water from the hot water valve 2 are mixed and upstream of a portion where the remaining hot water is mixed. In the example, it is arranged downstream of the portion 14 where the hot water from the injection valve 2 and the tap water from the injection valve 1 are mixed, and upstream of the portion 15 where the remaining hot water 10 is mixed. Reference numeral 16 denotes a pressure introducing pipe which is connected so as to detect the water supply pressure near the water injection valve 1, but may detect the water supply pressure near the water injection valve 2. Reference numeral 18 denotes a drain pipe for guiding water discharged from an atmosphere release valve described later to the outside of the appliance. Reference numeral 19 denotes a portion through which the drain pipe 18 passes through the case, and reference numeral 20 denotes a drain receiver.
[0015]
FIG. 2 shows details of the backflow prevention device 13. 21 is an inlet for water or hot water, and 22 is an outlet. Reference numeral 23 denotes a primary pressure inlet which is connected to the pressure introducing pipe 16 and introduces a water supply pressure near the water injection valve 1. Reference numeral 24 denotes a diaphragm A having a pressure receiving portion 25 for receiving a water supply pressure near the water injection valve 1. Reference numeral 26 denotes a water pressure receiving space in the backflow prevention device 13. Reference numeral 27 denotes a diaphragm B, which has a pressure receiving portion 28 for receiving atmospheric pressure and a pressure receiving portion 29 for receiving water pressure in the backflow prevention device 13. Reference numeral 30 denotes an atmosphere release valve, which has a valve body 31 made of rubber or the like, and has a pressure receiving portion 32 which receives the water pressure in the backflow prevention device 13. The area of the pressure receiving portion 29 of the diaphragm B27 that receives the water pressure in the backflow prevention device 13 is smaller than the area of the pressure receiving portion 32 of the atmosphere release valve 30 that receives the water pressure in the backflow prevention device 13. The area of the pressure receiving portion 25 of the diaphragm A24 is set as large as possible, and is larger than the area of the pressure receiving portion 32 that receives the water pressure in the backflow prevention device 13 of the atmosphere release valve 30. 33 is a spring which urges the atmosphere release valve 30 in a direction to open. The force of the spring 33 is set to be small enough to open the air release valve 30 only when little other force is applied, such as when there is no water. 34 is a communication port with the atmosphere. Reference numeral 35 denotes a shaft connecting the respective diaphragms 24, 27 and the atmosphere release valve 30.
[0016]
The operation and operation of the apparatus for pouring water into the apparatus configured as described above will be described below.
[0017]
In FIG. 2, an operation in a normal state without water interruption or the like will be described. When the downstream side of the outlet 22 is closed by the device 2, the water supply pressure is simultaneously applied to the pressure receiving portion 29 of the diaphragm B 27 and the pressure receiving portion 32 of the atmosphere release valve 30 in the backflow prevention device 13. On the other hand, the water supply pressure in the vicinity 17 of the water injection valve 1 is applied to the pressure receiving part 25 of the diaphragm A24 which receives the water supply pressure in the vicinity of the water injection valve 1, and the pressure reception part 28 of the diaphragm A27 which receives the atmospheric pressure of the diaphragm B27 receives the atmospheric pressure. It takes. However, since the pressure receiving area of the diaphragm A24 is large and the water supply pressure in the vicinity 17 of the water injection valve 1 is higher than the atmospheric pressure, the overall resultant acts in a direction to close the atmosphere release valve 30. The spring 33 urges the air release valve 30 in the opening direction, but does not open the air release valve 30 because it is set to a small force.
[0018]
Next, FIG. 3 shows a case where the water pressure in the backflow prevention device 13 rises and becomes higher than the water supply pressure near the water injection valve 1. Immediately after the water heater 12 has been burning for 10 minutes or more and stopped after the water heater 12 has been burned for a long time, for example, when hot water is supplied to the bathtub 9, the water in the heat exchanger (37 in FIG. 1) of the water heater 12 becomes residual heat. When the water pressure in the backflow prevention device 13 rises sharply due to the after-boiling phenomenon that is heated by the temperature rise and the temperature rises, the high water pressure is applied to the pressure receiving portion 29 receiving the water pressure of the diaphragm B27 and the pressure receiving portion 32 receiving the water pressure of the atmosphere release valve 30. Take it. Since the area of the pressure receiving portion 29 of the diaphragm B27 is smaller than the area of the pressure receiving portion 32 of the atmosphere release valve 30, when the water pressure increases, the supply water pressure in the vicinity 17 of the water injection valve 1 applied to the diaphragm A24 and the pressure applied to the diaphragm B27 are reduced. The force applied to the pressure receiving portion 32 of the atmosphere release valve 30 becomes larger than the resultant force, the valve element 31 is momentarily opened, and the water 36 in the pipe is discharged to the drain pipe 18. Due to this effect, the air release valve 30 is opened and the valve body 31 is frequently opened and closed each time the water heater 12 is stopped from the long-time combustion and the after-boiling phenomenon occurs. Therefore, even in a situation where the water supply is interrupted very rarely, for example, in a situation where the water supply is interrupted only once every few years, the valve element 31 is not always closed and fixed, and the reliability of the check prevention function is improved. Can be enhanced.
[0019]
(Example 2)
FIG. 4 shows a backflow prevention device for a device for pouring water into equipment according to Embodiment 2 of the present invention.
[0020]
The difference from the first embodiment is that the backflow prevention device 13 is disposed immediately downstream of the water injection valve 1 and upstream of the portion 15 where the remaining hot water 10 is mixed. In order to integrate with the water injection valve 1, it is desirable that the backflow prevention device 13 is located at a position immediately downstream of the water injection valve 1.
[0021]
This embodiment is effective when the backflow prevention device is already attached to the water heater 12. Thereby, integration with the water injection valve 1 becomes possible, and a simple configuration can be achieved.
[0022]
【The invention's effect】
As described above, in the apparatus for pouring water into the device of the present invention, even in the case where water is cut off in a state where the function of the check valve is obstructed, the dirty water flows back into the water pipe by the backflow prevention device. The air release valve of the backflow prevention device is opened and closed when the water pressure in the backflow prevention device becomes higher than the water supply pressure of the water injection valve due to the post-boiling phenomenon of the water heater, preventing the valve from sticking. , And can surely prevent backflow.
[Brief description of the drawings]
FIG. 1 is an overall configuration diagram of a device for pouring water into equipment according to a first embodiment of the present invention. FIG. 2 is a cross-sectional view showing a normal use state of the backflow prevention device. FIG. FIG. 4 is an overall configuration diagram of an apparatus for pouring equipment into a device according to a second embodiment of the present invention. FIG. 5 is an overall configuration diagram of a device for pouring conventional equipment.
DESCRIPTION OF SYMBOLS 1 Water injection valve 2 Water injection valve 4 Flow path switching valve 6 Check valve 13 Backflow prevention device 24 Diaphragm A
27 Diaphragm B
30 Atmospheric release valve

Claims (4)

A pouring valve for supplying hot water, a pouring valve for supplying tap water, a flow path switching valve for switching a flow path for supplying remaining hot water in the bathtub to the device or the bathtub, and at least one of the pouring valve and the pouring valve A backflow prevention device disposed on the downstream side and upstream of a portion where the remaining hot water is mixed, wherein the backflow prevention device increases the water pressure in the backflow prevention device due to a post-boiling phenomenon, and the water injection valve Alternatively, a pouring device for a device having an atmosphere opening valve that opens and closes according to a pressure difference when the supply pressure of the pouring valve becomes higher. A diaphragm is provided between the pressure receiving part of the water supply pressure of the water injection valve or the pouring valve, the pressure receiving part of the water passing through the backflow prevention device, and the water pressure receiving part of the backflow prevention device and the pressure receiving part of the atmospheric pressure. Provided, an atmosphere release valve is located between them, the diaphragm and the atmosphere release valve are connected, and the atmosphere release valve is urged by a spring in a direction to be opened, and a hydraulic pressure receiving area of the diaphragm on the atmospheric pressure side is provided. 2. The apparatus for pouring water into an apparatus according to claim 1, wherein the area is smaller than a water pressure receiving pressure area in the backflow prevention device of the atmosphere release valve. 3. The apparatus according to claim 2, wherein the pressure receiving area of the diaphragm on the pressure receiving portion side of the feed pressure of the water injection valve or the hot water valve is larger than the pressure receiving area of the air release valve in the backflow prevention device. The pouring device according to any one of claims 1 to 3, wherein the backflow prevention device is disposed immediately downstream of the water injection valve.

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