JP2003307322A - Expansion water absorber for main stop system water heater - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an energy-saving and resource-saving type water heater for efficiently treating expansion water generated by a main stop system water heater. <P>SOLUTION: An expansion water tank 6 having capacity exceeding an expansion water quantity at heating time of at least the electric water heater 1 is arranged in a water supply side pipe for supplying water to the electric water heater 1. The water of an expansion quantity is transferred to the expansion water tank 6 from the inside of the electric water heater 1 of a full water state before heating, and hot water expanded at heating time is stored in the electric water heater 1 of lowering in a water level. The capacity of the expansion water tank 6 is arranged so as to store water by transferring the water of a water quantity stored in a hot water supply pipe 12 reaching a water discharge port 4 from the electric water heater 1 from the electric water heater 1 in addition to the expansion water quantity at heating time. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention provides an expansion water for a water stop type water heater, which provides an energy-saving and resource saving type water heater by efficiently treating the expansion water generated in the water supply type electric water heater. Regarding the absorber.

[0002]

2. Description of the Related Art As a hot water supply system using a water heater, there are a pre-stop type that closes a flow path on the downstream side of the water heater and a main stop method that closes the flow path on the upstream side of the water heater. FIG. 11 shows an example of the latter original stop type water heater.

In FIG. 1, reference numeral 41 denotes an electric water heater installed inside a vanity cabinet, a kitchen cabinet, etc., which is provided with a heating element 42 therein, and the heating element 42 heats the water. It is like this.
Reference numeral 43 denotes a mixing stopper serving as a hot water spouting unit, which includes a water side spouting handle 45A, a hot water side spouting handle 45B, and a spouting pipe 44.

In the case of the hot water supply system of this example, when water is warmed in advance by the electric water heater 41 and supplied to the mixing tap 43 as a water discharge part, expansion water is generated in the electric water heater 41. Therefore, the expanded water is supplied to the electric water heater 41 by some means.
I need to get it out.

[0005] Therefore, the original stop type electric water heater 41 shown in FIG.
In the case of, the hot water spout handle 45B of the mixing tap 43 cannot be completely closed, so that the expansion water from the electric water heater 41 is led to the mixing tap 43 through the hot water supply pipe 48, and further from the spouting pipe 44. I was trying to escape to the outside.

However, as described above, the expansion pipe 44 discharges the expanded water.
If it is allowed to escape from the outside to the outside, the expansion water generated in the main stop type electric water heater drips from the spout, and there is a disadvantage that the user mistakenly thinks that the faucet is out of order. Moreover, since the expanded water drips down every time the electric water heater 41 is heated, there is also a disadvantage that the sink or the like becomes dirty with scale.

Further, the heat of the hot water remaining in the water discharge pipe 44 is dissipated and cooled, and when the water is used thereafter, the water whose temperature has dropped inside the water discharge pipe 44 first comes out, which gives the user discomfort. It was

Furthermore, since the heated expanded water and the water whose temperature in the water discharge pipe 44 has dropped are discarded after each use, it is an extremely irrational device from the viewpoint of energy saving and resource saving.

Therefore, as an apparatus for absorbing the expansion water generated in the main stop type water heater, an application device for absorbing the expansion water from the main stop type water heater described in JP-A-2000-65374 has been filed.
This absorbing device was devised to solve the problem that the expansion water from the original hot water heater drips from the water discharge part, and when the expansion water occurs in the electric water heater, the expansion water It is provided with an expansion water tank that escapes through a flow path between the electric water heater and the solenoid valve.

[0010]

In the application of the absorbing device for the expanded water, it is described that the phenomenon that the expanded water drips from the water discharge part is eliminated, and the cold water discharge can be eliminated or reduced at the initial stage of the water discharge. Has been done. However, from the viewpoint of energy saving, this absorber still has a problem to be solved.

That is, since the hot water expanded by the heating of the electric water heater is returned to the absorbing device, the energy spent for heating is wasted when the hot water is cooled in the absorbing device. Since this expanded hot water is generated by about 3% every time the water heater is used, it can be seen that a great amount of energy is wasted during the whole year.

Further, in the above-mentioned absorption device, in order to adjust the water level in the water discharge part, it is necessary to provide the position of the bottom of the expansion water tank at a position lower than the water discharge part and adjustable. As a result, the mounting position of the absorbing device is limited to the height of the water discharge portion, and it is extremely difficult to mount the absorbing device afterwards.

Therefore, the present invention was created to solve the above-mentioned problems, and it becomes possible to efficiently treat the expansion water generated in the original stop type water heater, and to provide an energy-saving and resource-saving type water heater. It is an object of the present invention to provide an expanded water absorbing device for a hot water heater that can be provided.

[0014]

In order to achieve the above-mentioned object, the first means of the present invention is to provide an expansion water absorbing device for absorbing expansion water generated in a main stop type electric water heater 1. At least the electric water heater 1 in the water supply side pipeline that supplies water to
The expanded water tank 6 having a capacity exceeding the expanded water amount at the time of heating is provided, and the expanded water amount is transferred from the electric water heater 1 in a full state before heating to the expanded water tank 6 to lower the water level. It is provided to store hot water expanded in the vessel 1 when heated.

In the second means, the capacity of the expansion water tank 6 is such that the amount of water that is stored in the hot water supply pipe 12 from the electric water heater 1 to the water outlet 4 is added to the electric water heater in addition to the amount of water that has expanded during heating. It is provided to move from 1 to store water.

The expansion water tank 6 in the third means is a water storage cylinder 31 for storing water by returning at least the amount of water for the expansion from the electric water heater 1 when it is full, and is vertically movable inside the water storage cylinder 31. When the water is supplied to the inside of the electric water heater through the expansion water tank until the water is full, the slider 26 is pushed up by the water supply pressure to store the water in the water storage tube 31.
Is provided so as to form an empty space having a volume corresponding to the amount of water for expansion, and the slider 26 is pressed downward by the urging force of the spring 32 when the water supply is stopped. The means to solve the problem will be provided to return the water.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

The absorption device of the present invention is attached to a water supply side pipe line for supplying water to the electric water heater 1 (see FIG. 1). That is, the water supply pipe 9 which is a pipe from the water supply source is connected to the mixing stopper 3. When the conduit is opened by operating the faucet handle 5 of the mixing stopper 3, water flows through the water supply pipe 10 into the expansion water tank 6 by the water supply pressure. Further, water is supplied from the expanded water tank 6 to the electric water heater 1 through the water supply pipe 11.

When the water supply is stopped by operating the faucet handle 5, the water in the electric water heater 1 flows through the water supply pipe 11 into the expansion water tank 6 through the water storage pipe opening 8 by the action of the expansion water tank 6. As a result, a space for storing the expanded water is created in the electric water heater 1. Heating element 2 in electric water heater 1
The water heated by is expanded as hot water, and this expanded hot water is stored in the electric water heater 1 in which a space for expansion is formed in advance. When the conduit is opened by operating the faucet handle 5, water is discharged from the water discharge port 4 through the hot water supply pipe 12.

The expanded water tank 6 has a water storage cylinder 31 and a slider 26. The slider 2 shown in FIGS.
6 is slidably housed inside a water supply cylinder 28 provided below the water storage cylinder 31.

The water storage cylinder 31 has a structure for returning at least the amount of water for expansion from the electric water heater 1 and storing the water. When the water outlet 4 from the electric water heater 1 is provided at a position higher than the electric water heater, in addition to the amount of water for expansion, the hot water supply pipe 1 from the electric water heater 1 to the water outlet 4 is provided in the water storage cylinder 31.
It is provided so that the amount of water stored in 2 is transferred from the electric water heater 1 and stored. Further, in order to slide the slider 26, which will be described later, up and down, the amount of water stored in the water supply pipe 28 can be stored in the water storage pipe 31 through the continuous water supply pipe 22.

The slider 26 is movable up and down inside the water storage cylinder 31 to form an empty space having a volume corresponding to the amount of water for expansion inside the water storage cylinder 31. That is, when water is supplied to the inside of the electric water heater through the expansion water tank until the water is full, the slider 26 is pushed up by the water supply pressure to form an empty space in the water storage cylinder 31 having a volume corresponding to the amount of water for expansion. It is provided to do so. On the other hand, a spring 32 is attached to the upper part of the slider 26, and when the water supply is stopped, the slider 26 is pressed downward by the urging force of the spring 32 to return the water in the electric water heater 1 to the inside of the water storage tube 31. It is provided in.

Next, the operation of the expansion water tank 6 will be described with reference to FIGS. FIG. 2 shows the initial state. The slider 26 uses the spring 32 to supply the water 21
It is pressed to the side and the volume in the water storage cylinder 31 is maximized. The plug 24 in the check valve 23 has dropped to the water supply port 21 side (downward) due to its own weight, and the water supply pipe 22 is in an open state.

FIG. 3 shows a state of supplying water. When the water supply pipe 10 is opened by operating the water stopper handle 5 of the mixing stopper 3, the water supply pressure pushes the stopper 24 (see FIG. 8 for details) in the check valve 23 toward the water supply port 7 side to close the water supply pipe 22. . Then, the water passes through the branch port 25 and enters the water supply cylinder 28, and the slider 26 is moved (slides) to the water supply port 7 side when the water supply pressure is applied to the small partition plate 27 portion. When the water is stored in the water storage cylinder 31, the water is pushed out of the water storage cylinder port 8 as the partition plate large portion 30 of the slider 26 moves. At this time, the biasing force of the spring 32 that biases the slider 26 is set to be weaker than the water supply pressure. Further, when the confluence port 29 is opened by the movement of the slider 26, water flows from the water supply port 21 through the branch port 25 into the water supply pipe 28, enters the water supply pipe 22 through the confluence port 29, and flows out from the water supply port 7.

4 and 5 show a state in which the water supply is stopped. Water pipe 1 with electric water heater 1 full
When 0 is closed, the water supply pressure is not applied (see Fig. 4). Then, the spring 26 causes the slider 26 to move the water inlet 2
It is pushed down to the 1 side (see Fig. 5). By pushing down the slider 26, the electric water heater 1 is placed in the water storage cylinder 31.
Water from the side flows in from the water storage cylinder port 8.

When the water supply pressure is removed, the check valve 23
The inner plug 24 falls to the water supply port 21 (downward) due to its own weight,
The conduit of the water supply pipe 22 opens (see FIG. 6). Spring 32
When the slider 26 is pushed down to the water supply port 21 side by the water, the water in the water supply cylinder 28 is pushed by the small partition plate 27, passes through the branch port 25 and the check valve 23, and passes through the water supply pipe 22 to reach the water supply port. Extruded from 7.

FIG. 7 shows a state in which water moves from the electric water heater 1 to the water storage cylinder 31 after the water supply is stopped. When the merge port 29 is closed as the slider 26 is pushed down toward the water supply port 21, the water in the water supply pipe 28 passes through the branch port 25, the check valve 23, the water supply pipe 22, and the water supply port 7. Pushed out. When the slider 26 moves (slides) in the water storage cylinder 31 by the spring 32, the volume of water is supplied from the side of the electric water heater 1 to the water storage cylinder 3.
1, and as a result, a space for storing expanded water is created in the electric water heater 1. The volume of the water storage cylinder 31 in the illustrated example is set to a size capable of storing water of the volume in the water supply cylinder 28.

8 to 10 show the shape of the check valve 23 in the expansion water tank. The check valve 23 shown in FIG.
A stopper 24 including a valve 24A and a slide shaft 24B is used. In this embodiment, when water is supplied to the electric water heater 1, the water supply pressure is applied to the plug 24 to close the check valve 23, and when the water supply is stopped, the plug 24 falls due to its own weight and the check valve 23 is opened. The structure is such that

Further, as shown in FIG. 9, a valve 24A using a ball or a swing type (not shown) has the same function. That is, when the water supply (water supply pressure) closes the pipeline and water supply is stopped (water pressure is removed),
The pipe may be opened by a spring or its own weight.

Further, the check valve 23 shown in FIG. 10 reverses the slide shaft 24B of the stopper 24 shown in FIG.
A spring 24C is provided on the slide shaft 24B. If such a plug 24 is used, the direction of the expansion water tank can be freely set.

The position of the expansion water tank 6 used in the present invention is not limited to the example shown in FIG.
It can be installed at any position as long as it is below the position where the empty space is provided.

[0032]

The water heater of the present invention has achieved the initial object by being constructed as described above. That is, at least the electric water heater 1 is installed in the water supply side pipeline for supplying water to the electric water heater 1.
The expanded water tank 6 having a capacity exceeding the expanded water amount at the time of heating is provided, and the expanded water amount is transferred from the electric water heater 1 in a full state before heating to the expanded water tank 6 to lower the water level. By providing the hot water that has expanded in the water heater 1 when it is heated, it is possible to efficiently process the expanded water generated in the original hot water heater, and provide a water heater that saves energy and resources. can do.

Moreover, since it is only necessary to mount the expansion water tank 6 on the water supply side pipe for supplying water to the electric water heater 1, the mounting position of the absorbing device is limited to the height of the water discharge part as in the conventional case. , The inconvenience that it becomes extremely difficult to attach it later has been resolved.

In addition, the capacity of the expansion water tank 6 is added to the amount of water for the expansion amount at the time of heating, and the electric water heater 1 to the water discharge port 4 are added.
Since the hot water in the hot water supply pipe 12 returns to the electric water heater when the water supply is stopped, the hot water in the hot water supply pipe 12 is transferred from the electric water heater 1 to store the water.
It is possible to suppress the excessive heat radiation of the hot water in 2. In addition, the inconvenience that the user feels uncomfortable because the water whose temperature has dropped inside the hot water supply pipe 12 comes out first is eliminated.

Further, the expansion water tank 6 is provided with a water storage cylinder 31 for storing water by returning at least the amount of water for expansion from the electric water heater 1 when the water is full, and a slider movable up and down inside the water storage cylinder 31. When the inside of the electric water heater is filled with water through the expansion water tank, the slider 26 is pushed up by the water supply pressure to fill the inside of the water storage cylinder 31 with an empty space having a volume corresponding to the amount of water for expansion. And the slider 26 is pressed downward by the urging force of the spring 32 when the water supply is stopped, and the electric water heater 1 is placed inside the water storage tube 31.
Since the water in the inside is provided so as to be returned, it is possible to make the structure of the absorbing device of the present invention compact. As a result, there is an advantage that it can be extremely easily performed even in a normal installation work that is installed together with the installation for a general source water heater, and a work that is installed after the source water heater that is already installed.

As described above, according to the present invention, it is possible to efficiently treat the expansion water generated in the original stop type water heater, and to easily provide an energy-saving and resource-saving type water heater even after installation. It has various beneficial effects such as being able to perform.

[Brief description of drawings]

FIG. 1 is a schematic view showing a usage state of the present invention.

FIG. 2 is a sectional view showing an initial state of the expanded water tank of the present invention.

FIG. 3 is a cross-sectional view showing a water supply state in the expansion water tank of the present invention.

FIG. 4 is a cross-sectional view showing a stopped state of water supply in the expansion water tank of the present invention.

FIG. 5 is a cross-sectional view showing a state in which the slider descends in the water storage cylinder of the present invention.

FIG. 6 is a cross-sectional view showing a state where the slider further descends in the water storage cylinder of the present invention.

FIG. 7 is a cross-sectional view showing a state in which water in the electric water heater of the present invention moves to a water storage cylinder.

FIG. 8 is a cross-sectional view showing an embodiment of a check valve attached to the expansion water tank of the present invention.

FIG. 9 is a sectional view showing another embodiment of the check valve mounted on the expansion water tank of the present invention.

FIG. 10 is a cross-sectional view showing another embodiment of the check valve mounted on the expansion water tank of the present invention.

FIG. 11 is a schematic view showing an embodiment of a main stop type electric water heater.

[Explanation of symbols]

1 electric water heater 2 heating element 3 mixing tap 4 spout 5 faucet handle 6 expansion water tank 7 water outlet 8 Reservoir mouth 9 water pipe 10 Water pipe 11 water pipe 12 Hot water supply pipe 21 Water inlet 22 Water pipe 23 Check valve 24 stoppers 25 branch 26 Slider 27 small partitions 28 Water bottle 29 Confluence 30 partitions 31 water reservoir 32 spring 33 Air vent hole 41 electric water heater 42 heating element 43 Mixing stopper 44 Discharge pipe 45A Water side faucet handle 45B Faucet handle on the hot water side 46 Water pipe 47 Water pipe 48 hot water supply pipe

Continued front page    (72) Inventor Morito Yasushima             5-11-3 Niraira, Sumida-ku, Tokyo Stock market             Company Japan Itomic (72) Inventor Masahiro Hara             5-11-3 Niraira, Sumida-ku, Tokyo Stock market             Company Japan Itomic (72) Inventor Akihito Seya             5-11-3 Niraira, Sumida-ku, Tokyo Stock market             Company Japan Itomic F-term (reference) 3L070 BC26                 3L073 AA03 AA15 AA18 AB08 AB09

Claims (3)

[Claims] 1. An expansion water absorption device for absorbing expansion water generated in a main water heater, wherein the water supply side pipe for supplying water to the electric water heater has a capacity of at least a volume exceeding the amount of expansion water when the electric water heater is heated. An expansion water tank is installed to transfer the amount of expansion water from the electric water heater that is full before heating to the expansion water tank so that the hot water expanded during heating is stored in the electric water heater whose water level has dropped. An expanded water absorbing device for a water shut-off type water heater characterized by being provided. 2. The capacity of the expansion water tank is provided so that, in addition to the amount of expansion water at the time of heating, the amount of water stored in the hot water supply pipe from the electric water heater to the spout is transferred from the electric water heater and stored. The expanded water absorbing device for the original stop type water heater according to claim 1. 3. The expansion water tank has a water storage cylinder for storing water by returning at least the amount of water for expansion from the electric water heater when the water is full, and a slider movable up and down inside the water storage cylinder. , When water is supplied to the inside of the electric water heater through the expansion water tank until it becomes full, the slider is pushed up by the water supply pressure to form an empty space with a volume equivalent to the amount of water for expansion inside the water storage cylinder. The expansion water absorption for a main water heater as claimed in claim 1 or 2, wherein when the water supply is stopped, the slider is pressed downward by the urging force of the spring to return the water in the electric water heater to the inside of the water storage cylinder. apparatus.