JPH0779757B2 - Electric water heater - Google Patents

Description

Detailed Description of the Invention

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric water heater used at home.

2. Description of the Related Art In recent years, electric water heaters provided with a water filter device have become widespread. As shown in FIG. 3, a conventional electric water heater of this type has a pipe 51 taken out from a liquid container 50 through a switching valve device 52, one from a discharge port 53 to the outside, and the other water purification filter device 54.
Refluxed to container 50 through. As shown in FIG. 4, this water purification filter device 54 has a rectangular case 56 having a purifying agent 55 built-in and a porous body on the two upper and lower surfaces thereof, and a rectangular case 56 into a substantially rectangular box 57 having an open bottom. All the peripheral side surfaces having no holes were closely attached to the inner surface of the box 57. Further, in the conventional electric water heater of this type, as shown in FIG. 4, the box 57 through which the return pipe 58 penetrates from the side wall has an inclined ceiling inner surface or a horizontal ceiling inner surface.
It was only for me.

In the conventional structure as described above, when the holes in the upper and lower surfaces of the case 56 are clogged with water stains or dust, the flow of water during circulation purification is blocked and water leaks from the switching valve device 52 and the like. There was a problem such as causing. is there
Or if you are using an electric pump to circulate the water flow
May put an excessive load on the motor and cause a malfunction.
there were. Further, since there is no protrusion such as a current plate on the inner surface of the ceiling of the box 57, the water spouted from the reflux pipe 58 can only reach the purifying material 55 immediately before, and the purifying agent 55 spread laterally.
There was a problem that it did not pour to other parts of the area and the water was not purified effectively. The present invention solves the above-mentioned problems, and even if the case is clogged with water stains or dust , excess water pressure is not applied to the return path, and an excessive load may be applied to the pump.
It is a first object to provide an electric water heater without a heater. The second purpose is to prevent water from pouring evenly on any part of the purification material so that the purification material is not locally contaminated.
It is to provide an electric water heater or a water heater with excellent maintenance and durability .

In the electric water heater of the present invention, the first means for achieving the first object is a container for containing a liquid to be heated by a heating element, and an inside of the container.
The outlet channel for delivering the liquid of the
A return path for forcibly returning via an electric pump;
Provided facing the gas phase inside the container, the tip of the reflux path
And a purifier with a built-in purifying material located on the side,
And the connection between the purifier and the purifier, on the upstream side of the purification material
It is designed to have an open part that opens inside the vessel.
It The second means for achieving the second object is
The purifier is a case with built-in purification means and formed with a porous top and bottom.
And the bottom of the case where this case is detachably installed inside
It consists of a box and a reflux pipe penetrates one side of the box.
Notch is provided, and the notch is
It is equipped with a straightening vane that diffuses the hot water that gushed out.
It

The present invention has the above-mentioned structure and is provided upstream of the purification material even if the purification material is clogged with water stains or dust .
Water flows out from the open area, and extra water pressure is applied to the return path.
Will not be applied. In addition, the water circulation is electrically driven.
Excessive load on the motor even when pumping
I can't kick. Further, since the straightening vane is provided inside the box that houses the case, the water flow coming out of the return pipe hits the straightening vane and spreads laterally, and evenly reaches every corner of the purifying material below, which enables efficient purifying. At the same time, the deterioration of the purification material becomes uniform, and the life of the cleaning material as a whole is extended.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. As shown in the drawing, a lead-out pipe 2 led out from the bottom of a container 1 containing a liquid and having a heater at the bottom is connected through a switching valve device 3, one of which is a reflux pipe provided in a hole on a side surface above the container 1. Connect to pipe 4 and return
A flow path is formed, and the other side is external through the pipe 5.
It forms a hot water outlet that discharges to . The reflux pipe 4 is provided with a rectangular flange 6 inside the container 1, and has a protrusion 7 between the flange 6 and the outer surface of the reflux pipe 4, and the protrusion 7 is fitted into the hole on the side surface of the container. Detent is performed. On the other hand, by pulling the cam plate 9 through the container 1 from the cam projection 8 provided on the outer surface of the reflux pipe 4, the reflux pipe 4 is fixed to the container 1. Further, the purifying material 10 made of granular activated carbon or the like is housed in a case 11 having a large number of slit-shaped holes on each of the upper and lower surfaces thereof, and the case 12 has a substantially rectangular shape in which a projection 12 having a side surface is opened downward. The case 11 and the box 13 are integrated with each other by being locked to another protrusion 14 inside the box 13. Further, the longitudinal direction of the rectangular case 11 is orthogonal to the jet direction of the water flow of the reflux pipe 4, and the container 1 is provided between the outer surface of the side wall of the case 11 and the inner surface of the side wall of the box 13. Gas phase part A
An open part 15 is provided as a gap for the bypass channel that opens to the
I'm sick . This integrated box 13 is fitted into the reflux pipe 4 from above by fitting the groove 17 in the notch 16 provided on the side surface of the box 13 to the flange 6, and the claw 18 of the box 13 and the projection of the flange 6 are fitted. Locked at 19. In addition, the switching valve device 3
Is electrically controlled, and the hot water extruded from the outlet pipe 2 is flowed to the reflux pipe 4 side for a required time. In other cases, the hot water can be taken out by flowing to the pipe 5 side according to the operation from the outside. The hot water guided to the reflux pipe 4 is jetted from the outlet 20, and these hot water is suspended from the ceiling of the box 13 and provided in the longitudinal direction of the case 11.
When it hits the straightening plate 21, it spreads mainly in the left-right direction.
It The hot water that has spread in the left-right direction is the top surface of the purification material 10.
Evenly dispersed. Then, it passes through the purification material 10 and is purified.
The liquefied hot water is returned to the container 1 . For a long time
When the circulation purification is performed by
A slit-shaped hole on the upper or lower surface of the case 11
Will be clogged with water stains and debris. At this time, the case
The overflowing water that could not pass through the inside is opened from the opening 15.
As it flows down and returns to the container 1, the switching valve device 3 and
No excessive pressure is applied to the internal devices such as the reflux pipe 4 to prevent malfunction.
It is possible to prevent malfunctions . Where above
In the embodiment, the outer surface of the side wall of the case 11 and the side of the box 13
A gap is provided between the inner surface of the wall and the open portion 15, but the point is that
There is an open part that can bypass hot water etc. that has passed through the reflux pipe 4.
Then, the same operation as that of the present embodiment is achieved. Furthermore, the above-mentioned embodiment
In the case of the recirculation pipe 4 and the pipe 5 for external discharge,
Is connected to one outlet pipe 2 via the switching valve device 3.
However, there is a waterway for tapping outside and circulation.
As long as it has a water channel for purification, it is the same as this embodiment.
Produces the same effect . In addition, since the box 13 is made of a transparent material or the like, it is possible to visually check the adhesion state of the water scale inside the box 13, and it is possible to more accurately know the replacement time.
Further, by providing the straightening plate 21 on the ceiling of the box 13, it is possible to sprinkle the hot water evenly on the purifying material 10 so that the purifying material 10 can be efficiently purified, and since the hot water is not concentrated on a part, the purifying material 10 It is possible to prevent the partial deterioration of the above, and eventually, the circulation purification can be performed for a long time as a whole. When replacing the purifying material 10, the box 13 may be removed from the reflux pipe 4, the case 11 may be removed from the box 13, and the case 11 may be replaced.

As is apparent from the above embodiments, according to the present invention, even if the purifying material is clogged with water stains or dust, etc.
Water flows down from the open part provided on the upstream side, and returns
No extra water pressure is applied to the road. In addition, water
The motor is used even when the flow is circulated by an electric pump.
The battery has excellent durability without being overloaded.
A hot water heater can be provided. Also, a box containing the case
Water flow coming out of the reflux pipe due to the provision of a straightening vane inside
Hits this straightening plate and spreads out in the lateral direction.
I think that evenly falling down to every corner and efficient purification are possible.
In fact, the deterioration of the purifying agent becomes uniform and the life of the cleaning agent as a whole increases.
It will be extended .

[Brief description of drawings]

FIG. 1 is a sectional view of an essential part showing a purification filter device for an electric water heater according to an embodiment of the present invention.

FIG. 2 is an exploded perspective view of the purification filter device portion.

FIG. 3 is a sectional view of a conventional electric water heater.

FIG. 4 is a sectional view of the purification filter device portion.

[Explanation of symbols]

 1 Container 2 Derivation Pipe 4 Recirculation Pipe 10 Purifying Material 11 Case 13 Box 15 Opening Portion 16 Notch 21 Rectifier Plate

Claims (3)

[Claims] 1. A container for containing a liquid heated by a heating element.
And a hot water outlet for delivering the liquid in the container, and the container
Reflux forcibly refluxing the liquid inside via an electric pump
And the gas flow inside the container, the reflux
With a purifier with a built-in purifying material located on the tip side of the road,
Open to the inside of the container upstream from the purification material
An electric water heater equipped with a section . 2. The purifier has a purifying means built-in to make the upper and lower parts porous.
Formed case and this case is removable inside
The electric water heater according to claim 1, wherein the electric water heater comprises a box having an open bottom . 3. A notch through which a return pipe penetrates on one side of the box.
Along with the provision of a squirt, it spouts from the cutout inside the box.
The electric water heater according to claim 1, further comprising a straightening plate for diffusing the hot water.