JP3876524B2 - Electric water heater - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an electric water heater used in a general household.
[0002]
[Prior art]
As shown in FIG. 5 (refer to Japanese Patent Laid-Open No. 4-338424), this type of conventional electric water heater is provided with an outlet pipe 52 taken out from the liquid storage container 51 at the base of the upper side surface of the container 51. A porous case 56 containing a purifier 55 is connected to the reflux pipe 53 via a switching valve device 54, and is locked into a substantially rectangular box 57 having an open bottom, and the box 57 is connected to the reflux pipe. The structure fitted inside 53 containers 51 was used to purify the water in the container 51 to obtain delicious hot water.
[0003]
[Problems to be solved by the invention]
However, in the above-described conventional electric water heater, in order to fit the case 56 composed of two parts for covering the purifier 55 with a porous body into the container 51, the inside of the substantially rectangular box 57 with the bottom open is provided. Was necessary. That is, in order to install the purifying agent 55 in the container 51, three parts are required, which raises a problem that the cost is increased.
[0004]
In addition, when the electric water heater is heated and kept warm, the claw portion 57a of the box 57 that holds the case 56 containing the purifier 55 is exposed to a high temperature. In order to avoid such a situation, a sufficient allowance is required.
[0005]
Furthermore, when clogged with scales or dust, there is a problem that the water flow at the time of circulating water purification is blocked and water leakage occurs from the switching valve device 54 or the like.
[0006]
An object of the present invention is to solve the above problems, and to provide an electric water heater provided with a case with a built-in purifier that is inexpensive, improves assembly, and does not fall off even when exposed to a high temperature for a long time. To do. It is another object of the present invention to provide an electric water heater that does not cause water leakage from the switching valve device even when the case is clogged with scale or dust. It is another object of the present invention to provide an electric water heater that can supply water evenly to any part of the purifying agent in the case with built-in purifying agent of the present invention and perform efficient water purification.
[0007]
[Means for Solving the Problems]
To accomplish the above object, a filter having bottom and below the porous body casing, the box body is built cleaning agent covered with upper case installed a porous body at the interface between the said lower case A case is incorporated, and the box body is provided with a wall body that covers the outer periphery of the porous body disposed at the position above the purifier, and a part of the wall body is equivalent to the joint surface between the upper case and the porous body or An electric water heater comprising an upper case having a notch portion having a depth equal to or smaller than the upper case, wherein the notch width decreases as approaching the joint surface .
[0008]
With this configuration, the purifier built-in case can be configured with two parts, and the improvement in assembling property can be realized at low cost.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
The invention of claim 1, wherein the internal bottom and the lower porous body case, the filter case having a box body in which is incorporated a cleaning agent covered with upper case installed a porous body at the interface between the said lower case The box body is provided with a wall body that covers the outer periphery of the porous body disposed at the position above the purifier, and a part of the wall body is equal to or less than the joint surface between the upper case and the porous body. An upper case having a notch portion having a depth is provided, and the upper case is an electric water heater characterized in that the notch width decreases as it approaches the joining surface, and is inexpensive and easy to assemble. The improvement can be embodied.
[0010]
Furthermore , even if the pores of the porous body arranged above and below the box body are clogged with dirt or dust, it is possible to prevent water pressure from being applied to the switching valve device and the like, and to prevent water leakage. .
[0011]
Furthermore , the amount of water passing through the purifier can be adjusted according to the amount of water supplied to the box containing the purifier, and efficient water purification can be performed.
[0012]
【Example】
Hereinafter, an embodiment of the present invention will be described with reference to FIGS. As shown in the figure, the lead-out pipe 2 led out from the bottom of the liquid container 1 provided with a heater at the bottom is connected via a switching valve device 3 to a reflux pipe 2 ′ connected to the upper side surface of the container 1. At the same time, the other is connected to a discharge pipe that discharges to the outside through the pipe 5.
[0013]
The mounting jig 4 is located inside the container 1, and has a projection 7 between the rectangular flange 6 and the outer surface of the mounting jig 4. Stop is done. On the other hand, the attachment jig 4 is fixed to the container 1 by pulling the cam plate 9 through the container 1 with the cam protrusion 8 provided on the other part of the outer surface of the attachment jig 4. Further, the container 1 and the reflux pipe 2 ′ are coupled by the attachment jig 4.
[0014]
Further, the lower part of the purifier 10 made of granular activated carbon or the like is covered from the lower case 11b of the porous body 11a and the upper case 12b in which the porous body 12a is installed on the upper surface of the lower case 11b. The case 11b and the upper case 12b are joined by a method such as screwing or heat welding to form a box 13 containing the purifier 10 therein.
[0015]
Further, the box 13 is fitted to the recirculation pipe 4 from above by fitting the groove 14 provided in the lower case 11 b to the flange 6, and is provided on the claw 15 of the lower case 11 b and the recirculation pipe 4. Locked by the joint flange 16. The upper case 12b is provided with a wall body 17 that covers the outer periphery of the porous body 12a, and a plurality of cutout portions 18 on the joint surface between the porous body 12a and the upper case 12b are provided in a part of the wall body 17. Yes.
[0016]
Further, the notch 18 has a triangular shape as shown in FIG. 3, and is set so that the notch width becomes smaller as the porous body 12a is installed.
[0017]
FIG. 4 shows a flow path 19 formed when the box 13 is attached to the reflux pipe 2 ′ and the mounting jig 4, and the jet direction of the water flow from the reflux pipe 4 can be changed intentionally. The rectifying plate 20 is installed in the direction (C-shaped) in which the flow path is enlarged before reaching the porous body 12a of the box 13.
[0018]
The switching valve device 3 is electrically controlled, and hot water pushed out from the outlet pipe 2 for a necessary time is caused to flow toward the circulating pipe 2 ′. In other cases, the hot water can flow out to the pipe 5 side according to an operation from the outside, and the hot water can be taken out.
[0019]
The hot water guided to the reflux pipe 4 expands the flow path to the left and right by the rectifying plate 20, and is uniformly scattered to the purifier 10 through the porous body 12 a of the box 13.
[0020]
Further, the wall body 17 covering the outer periphery of the porous body 12a has a water pressure on the switching valve device 3 and the like even when the supply flow rate becomes excessive than the flow rate at which the purifier 10 can be added due to the decrease in the viscosity of the boiling water. The hot water can be stored and supplied onto the purifier 10 by the surface tension of the wall 17 and the hot water to such an extent that it does not hang.
[0021]
In this way, by supplying hot water evenly to the purifying agent 10, it is possible to purify efficiently, prevent partial deterioration of the purifying agent 10, and thus circulate and purify as a whole for a long time. It is.
[0022]
Here, if the circulatory purification is performed for a long time, the porous body 11a and the porous body 12a are clogged with scales and dust. At this time, hot water is circulated into the container 1 from the notch 18 provided in the wall body 17. By doing so, an excessive pressure is not applied to the internal device such as the switching valve device 3, and problems such as failure can be prevented.
[0023]
As shown in FIG. 3, when the cutout 18 is triangular and is set so that the cutout width becomes smaller as the porous body 12a is installed, the porous body 11a and the porous body 12a are clogged with water scale or dust. The amount of circulation can be adjusted.
[0024]
【The invention's effect】
As apparent from the above description of the embodiments, the invention of claim 1, the bottom and the bottom of the porous body casing, the cleaning agent covered with the upper case which established the porous body on the bonding surface of said lower case A filter case having a built-in box is built in, and the box is provided with a wall covering the outer periphery of the porous body arranged at a position above the purifier, and the upper case and the porous body are partially formed on the wall. The upper case has a notch with a depth equal to or less than or equal to that on the joint surface, and the upper case has a notch width that decreases as it approaches the joint surface. By constructing the built-in case with two parts, it is possible to realize an inexpensive and improved assembly.
[0025]
Furthermore , even if the pores of the porous body arranged above and below the box body are clogged with dirt or dust, it is possible to prevent water pressure from being applied to the switching valve device and the like, and to prevent water leakage. .
[0026]
Furthermore , the amount of water passing through the purifier can be adjusted according to the amount of water supplied to the box containing the purifier, and efficient water purification can be performed.
[Brief description of the drawings]
FIG. 1 is a cross-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 of the electric water heater. FIG. 4 is a view showing a notch groove provided in a filter. FIG. 4 is a view showing a flow path of water supplied to a purification filter of an electric water heater. FIG. 5 is a main portion showing a conventional purification filter device for an electric water heater. Sectional view [Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Container 2 Outlet pipe 2 'Reflux pipe 3 Switching valve apparatus 4 Mounting jig 10 Purifier 11a Porous body 11b Lower case 12a Porous body 12b Upper case 13 Box body 14 Groove 15 Claw 17 Wall body 18 Notch part 19 Flow path 20 Rectifier

Claims (1)

Bottom incorporates the lower case of the porous body, the filter case having a box body in which is incorporated a cleaning agent covered with upper case installed a porous body at the interface between the said lower case, the box body, purifying A wall body covering the outer periphery of the porous body arranged at the position on the agent is provided, and a part of the wall body has a cutout portion having a depth equal to or less than or equal to the joint surface between the upper case and the porous body. An electric water heater comprising an upper case, wherein the upper case has a notch width that decreases as it approaches the joint surface .

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