JPH07104047B2 - Automatic water supply - Google Patents

Description

TECHNICAL FIELD The present invention relates to an automatic water supply device that automatically opens and closes a water solenoid valve to supply hot water.

[Prior Art] In a water supply device such as an automatic water filling device that opens or closes a water solenoid valve to start or end filling of a bathtub, when the water solenoid valve opens or closes when the water supply pressure is high. In addition, water hammer is likely to occur in the water pipe, and accompanying noise or vibration is likely to occur. Therefore, as a water hammer sound absorber for reducing the influence of such a water hammer, for example, in the invention of Japanese Patent Application Laid-Open No. 2-140555, it is an object to provide the water hammer on the upper and lower sides of a water heater as a water filling device. As such, a gas chamber formed between an inner pipe and an outer pipe may be connected to an inner pipe for supplying water.

[Problems to be Solved by the Invention] However, the influence of the water hammer accompanying the opening / closing operation of the water solenoid valve is
It appears not only on the upstream side of the water filling device including the water solenoid valve, but also on the downstream side of the water solenoid valve. In particular, for example, when the bathtub is provided in the unit, the unit is made of resin and easily vibrates, so even a small water hammer noise will resonate or resonate in the unit bath. ,
It gives the user discomfort.

On the other hand, the water hammer noise absorber according to the above invention was conceived on the assumption that it is provided on the upstream side of the water heater, and therefore, for high pressure water supplied from the water supply. For the purpose of effectively reducing the water hammer noise that appears on the upstream side of the water heater, and because it is necessary to prevent the gas in the gas chamber from flowing out to the flow passage during repeated use, The inner pipe as a flow passage is communicated with a small hole so that the degree of communication is limited, whereby the gas in the gas chamber is secured.

Therefore, in order to reduce the water hammer sound on the downstream side of the water solenoid valve, even if the water hammer sound absorber of the above invention is provided on the downstream side of the water solenoid valve, the water hammer when the water solenoid valve is opened and closed is reduced. However, there is a problem that the effect due to the water hammer cannot be sufficiently reduced in the unit bath, which has a small effect and is apt to cause resonance and the like due to a slight water hammer sound.

The present invention is an automatic water supply device that alleviates the effect of a water hammer and does not cause discomfort to the user even when filling a unit bath that is easily affected by a slight water hammer or resonance or resonance. The purpose is to provide.

[Means for Solving the Problem] The present invention provides a water supply device in which a filling pipe for supplying hot water according to a supply water pressure of a water supply source such as water supply is connected to a bathtub. A water solenoid valve is provided in the water filling pipe, and a closing pipe member is branched and connected to the water filling pipe downstream of the water solenoid valve, and the closing pipe member is arranged upward from a connection portion with the water filling pipe. The technical means is to form an air pocket and control the supply of hot and cold water to the bath by opening and closing the water solenoid valve.

According to a second aspect of the present invention, there is provided a water supply device in which a water filling pipe for supplying hot water from a water supply source such as water supply is connected to a bathtub. An up-and-down direction portion is provided downstream of the solenoid valve in which the water filling pipe is arranged in a substantially up-and-down direction. The technical means is to form an air pocket by communicating with the direction portion.

[Operation] In the invention of claim 1, when the water solenoid valve is opened, the hot water passes through the water solenoid valve and further flows into the filling pipe between the water solenoid valve and the bath.

Part of the hot water that has passed through the water solenoid valve flows into the closed pipe member branched from the water filling pipe, compresses the air in the air pool formed by the closing pipe member, and the rest passes through the water filling pipe and is supplied to the bathtub. To be done.

Therefore, the water hammer given to the hot water pipe when hot water goes from the water solenoid valve to the bathtub is gradually absorbed when compressing the air in the air reservoir of the closed pipe member, and the water hammer is hard to be transmitted to the bathtub.

Also, when hot water is being supplied to the bathtub, there is momentum from the hot water pipe to the hot water pipe, so when the water solenoid valve is closed, the hot water in the closing pipe member is drawn out by the hot water in the hot water pipe. At that time, the air pressure of the air in the air reservoir gradually lowers to mitigate the water hammer.

According to the second aspect of the present invention, when the water solenoid valve arranged on the water filling pipe is opened, the hot water is supplied to the bathtub through the vertical portion where the water filling pipe is arranged substantially vertically. Since the outer pipe portion provided on the outer side is communicated with the vertical portion, the hot and cold water blocks the communication portion between the vertical portion and the outer pipe portion to confine air in the outer pipe portion, The air in the outer pipe is pushed by the supply pressure of the hot water.

Therefore, the water hammer when the hot water flows in is mitigated by the air pool.

Further, when the water solenoid valve is closed, the hot water that has been pushed into the air pool is drawn out toward the bathtub, so the air pressure inside the air pool gradually decreases, weakening the momentum of the hot water supplied to the bathtub, Alleviate the water hammer.

EFFECT OF THE INVENTION In the present invention, a water hammer that occurs when the water solenoid valve of the water filling pipe is opened to supply hot water or when the water solenoid valve is closed to stop the supply of hot water is on the way to the bathtub. Since it is absorbed by the air pocket provided, the water hammer noise and vibration generated on the downstream side of the water solenoid valve will not be conducted to the bathtub.

Therefore, even if the bathtub is provided in the unit bath,
The water hammer does not cause the unit to resonate or resonate, and the vibration and water hammer noise rarely cause discomfort.

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

The automatic gas water heater 1 shown in FIG. 1 is a combined hot water supply system having an automatic hot water filling function, a reheating function, etc., and heats water passing through a water supply pipe 2 connected to a water supply source such as water supply. And a main heater 10 for supplying hot water to some hot water taps A or bath B, a bath heater 30 for circulating hot water in the bath B to heat them, and each of these heaters 10, 30 and hot water taps A
And several tube members that connect the bath B to form a water circuit.

The water supply pipe 2 is branched into two, one of which is connected to the main heat exchanger 11 of the main heater 10 and the other of which serves as a bypass pipe 12 as a bypass of the main heat exchanger 11 and is required for the bypass pipe 12. A bypass solenoid valve 13 that is opened and closed according to the above is provided, and the main heat exchanger 11 and the bypass pipe 12 join to form a hot water outlet pipe 14.

Furthermore, the hot water supply pipe 14 is branched, and one is a hot water supply pipe to each hot water tap A
15 and the other is a pipe 16 for filling the bathtub B.

The water filling pipe 16 is provided with a water filling solenoid valve (hereinafter referred to as “water filling valve”) 17 for controlling the water filling in the bathtub B, and two check valves 18 are provided downstream thereof. Has been.

The water filling pipe 16 is branched into two downstream of the check valve 18, one of which is directly connected to the bathtub B and serves as a forward pipe line 31 through which hot water always moves toward the bathtub B, and the other is a bath heater. It is connected to the bathtub B through the bath heat exchanger 32, the two-way valve 33 and the pump 34 of 30 and is a reverse direction pipe line 35 in which the moving direction of hot water differs between the time of filling the water and the time of reheating the water. A bath circulation circuit 30a is formed from the directional pipe 31, the bath heat exchanger 32, and the reverse pipe 35.

Further, a water hammer reducing member 50 is provided in the forward pipe line 31 which is directly connected to the bathtub B.

As shown in FIG. 1, the water hammer reducing member 50 is formed by connecting a closed pipe member 51 having a closed tip so as to branch from the forward pipe line 31 so as to communicate with the forward pipe line 31. The pipe members 31a and 31b of the forward pipe line 31 and the closed pipe member 51 arranged are
It is connected through a character tube 52.

The closed pipe member 51 has a substantially L-shape with its tip 51a bent upward, and the closed pipe member 51 is fixed to the T-shaped pipe 52 by brazing, and the pipe member 31a and the pipe member 31b. Is likewise confidentially connected to the T-tube 52 by brazing.

As a result, when hot water is supplied to the forward pipe line 31,
An air reservoir 51A is formed in the closed tube member 51.

On the other hand, in the reverse pipe 35, between the pump 34 and the bath B,
A water level sensor 36 for checking the water pressure of the bathtub B is provided.

In each pipe of the main heater 10 in FIG. 1, 3 is a hot water servo for adjusting the inflow flow rate, 4 and 5 are thermistors, 6 and 7 are flow rate sensors, 8 is a vacuum breaker, and bath heating In the bath circulation circuit 30a of the vessel 30, 37 is a thermistor and 38 is a water flow switch for detecting hot and cold water in the bath.

Further, each heater 10, 30 is provided with a main burner 10A for heating each of the above heat exchangers 11, 32, a bath burner 30A, and a blower 10B, 30B for each burner 10A, 30A. It is equipped.

The automatic gas water heater 1 having the above configuration is controlled by the control device 60.

The control device 60 is provided with a remote controller 80 for setting a hot water supply temperature as a target temperature or a water filling temperature or a target water level for water filling, or for giving an instruction of a water filling operation or an additional heating operation. Hot water supply operation, hot water filling operation, additional heating operation, etc. are controlled according to the operation state.

Here, the filling operation will be briefly described.

In the water filling operation, when the remote controller 80 is instructed to fill the water, the water amount servo 3, the water filling valve 17, the two-way valve 33 are operated in a predetermined sequence.
Is controlled to automatically supply hot water to the target water level in the bathtub B at the set hot water temperature. In this embodiment, in order to quickly complete hot water filling, the target water level is first adjusted. The predetermined amount of hot water is supplied to the bathtub B based on the flow rate detected by the flow rate sensor 7, and then hot water is supplied based on the water level detected by the water level sensor 36 until the target water level is reached.

The hot water is supplied to the bathtub B mainly through the forward pipe 31 of the bath circulation circuit 30a. However, when hot water is supplied based on the flow rate inspection, a large amount of hot water is supplied to the bath. Not only from the forward line 31 of the circulation circuit 30a,
The two-way valve 33 is opened in the middle of filling the water, and the water is also supplied from the reverse direction pipe line 35.

Hereinafter, the operation of the water hammer reducing member 50 in the filling operation will be described.

When the water filling valve 17 is opened, the water in the water filling pipe 16 is used as a bath circulation circuit.
It flows into the forward pipe line 31 of 30a.

At this time, hot water passes from the pipe member 31a to the pipe member 31b in the forward pipe line 31, but the air in the closed pipe member 51 branched and connected from the T-shaped pipe 52 is trapped by the hot water passing therethrough. The air pool 51A is formed, and the pressure of the hot water is absorbed by the air pool 51A.

As a result, this occurs when the water filling valve 17 opens and the pipe member 31a
The water hammer transmitted from is weakened by the air pool 51A,
The impact disappears when moving toward the pipe member 31b.

As a result, no vibration is transmitted to the bathtub B to which the hot water is supplied.

Further, when the water filling valve 17 is closed by stopping or ending the water filling, the hot water flowing through the water filling valve 17 suddenly stops and a water hammer occurs, but the downstream side of the water filling valve 17 In the forward conduit 31, the air in the air reservoir 51A of the closing pipe member 51 is sucked by the hot and cold water flowing toward the bathtub B, and this suction lowers the air pressure in the air reservoir 51A, and the forward conduit 31 The vibration transmitted from the bathtub to the bathtub B is weakened.

Therefore, for example, as shown in FIG. 1, the bathtub B is provided in the unit bath 100 as shown by the chain double-dashed line,
Even if the bath circulation circuit 30a is fixed through the unit bath 100, the water hammer caused by opening and closing the water filling valve 17 does not directly reach the unit bath 100, and the unit bath 100 resonates. Does not resonate. Therefore, no discomfort is given to the user.

Next, a second embodiment of the present invention will be described with reference to FIG.

In the second embodiment, a water hammer reducing member 70 having a substantially double pipe structure as shown in FIG. 3 is used instead of the water hammer reducing member 50 having the substantially L-shape in the first embodiment. .

This water hammer reducing member 70 is provided with a large-diameter pipe member 72, which encloses the pipe member 71 at a distance, on the outside of a small-diameter pipe member 71 used as the forward-direction pipe line 31. The pipe member 73 connected to the bathtub B as the pipe 31 is not connected to the pipe member 71 but is connected to the pipe member 72.

As a result, the pipe member 71 projects into the pipe chamber 70a formed by the pipe member 72 and the pipe member 73, and the lower end 71a of the pipe member 71 is formed.
Are arranged at intervals with respect to the pipe member 72 and the pipe member 73.

When the water hammer reducing member 70 having the above-mentioned configuration is arranged in the forward pipe line 31 and hot water is supplied by the filling operation, the pipe chamber 70a is downwardly and downwardly from the lower end 71a of the pipe member 71. Edge 71
The supplied hot water fills a part from the vicinity of a toward the upper side, but since the air reservoir 70b is formed outside the pipe member 71 in the upper portion of the pipe chamber 70a, the filling valve 17 is opened and closed. Even if a water hammer occurs, the water hammer is mitigated by the air pool 70b, so that the water hammer is not transmitted to the bathtub B. In particular, even when the bathtub B is provided in the unit bath 100. Since the water hammer transmitted from the bath circulation circuit 30a to the unit bath 100 is reduced, there is no discomfort due to vibration or the like.

In this embodiment, the residual water in the bathtub B is detected before the water filling operation. At this time, when the bathtub B is empty, the pump 34 is in an empty operation to circulate the air and the water hammer reducing member 50, Always supplied to 70. Therefore, even if the air in the air pools 51A, 70b of the water hammer reducing members 50, 70 is reduced, the air hammer 51 is replenished so that the efficiency of water hammer absorption does not decrease.

Incidentally, in the water hammer reducing member 50, 70 of each of the above embodiments,
Although the passing direction of the hot water in the forward conduit 31 has been described from the upper side in the figure, the same effect can be obtained even when the passing direction of the hot water in the forward conduit 31 is from the lower side.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of an automatic gas water heater showing an embodiment of the present invention, FIG. 2 is a sectional view of a water hammer reducing member showing a first embodiment of the present invention, and FIG. 3 is a second view of the present invention. It is sectional drawing of the water hammer reduction member which shows an Example. In the figure, 1 ... Automatic gas water heater (automatic water supply device), 16 ...
Hot-water filling pipe (hot-water supply pipe), 17 ... Hot-water filling solenoid valve (water solenoid valve), 51 ... Closing member, 51A ... Air reservoir, 52 ... T
Character tube (connection part), 70 ... Water hammer reducing member (air trap forming member), 70a ... Pipe chamber, 70b ... Air trap, 71 ... Pipe member (second pipe member), 71a. Edge, 72 ... Pipe member (first pipe member), B ... Bathtub.

Claims (2)

[Claims] 1. A water supply apparatus in which a water filling pipe for supplying hot and cold water by a water supply source such as water supply is connected to a bathtub, wherein the water filling pipe is provided with a water solenoid valve, A closed pipe member is branched and connected to the water filling pipe downstream of the solenoid valve, and the closing pipe member is arranged upward from a connection portion with the water filling pipe to form an air reservoir, An automatic supply device, characterized in that the supply of hot water to the bathtub is controlled by opening and closing. 2. A water supply apparatus in which a water filling pipe for supplying hot water by a water supply source such as water supply is connected to a bathtub, wherein the water filling valve is provided with a water solenoid valve, and the water solenoid valve is provided. An up-down direction portion in which the water-filled pipe is arranged in a substantially up-down direction is provided downstream, and an outer pipe portion forming an air chamber is arranged around the up-down direction portion, and the outer pipe portion is placed below the up-down direction portion. An automatic water supply device characterized by forming an air pocket by communicating with the air supply.