JPH0535817Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to an electric water heater for use in general households.

Conventional technology Conventionally, in this type of electric water heater, a control holding box was secured to the lower cover covering the lower part of the appliance, and wiring was processed through the narrow opening of the lower cover before covering the back plate. .

Problems that the invention aims to solve In such a conventional structure, in order to assemble the wiring, first cover the lower cover and then lock the holding box, and then use the narrow space left to assemble the wiring. It required some sorting, and therefore assembly was very difficult.

This invention solves these problems,
The object of the present invention is to provide an electric water heater that can facilitate wiring work and reduce costs.

Means for Solving the Problems In order to solve the above-mentioned problems, the electric water heater of the present invention has a plurality of U-shaped support fittings with rectangular lower ends attached to the peripheral edge of the bottom outer surface of the container. is fixed, and an annular lower cover is provided to cover the opening at the bottom of the vessel body that covers the outer periphery of the container, and a protrusion facing the support fitting is provided at the inner edge of the opening of the lower cover, and this protrusion An enclosure that fits into the rectangular lower end of the support fitting is provided in the part, and a claw that comes into contact with the back surface of the support fitting is provided in a part of the enclosure, and the lower end of the support fitting fits into the protrusion of the lower cover. , the back plate that covers the opening of the vessel is screwed.

Effect In the above configuration, when installing a holding box containing a control electronic circuit section in the space between the heater and the lower cover, the holding box is temporarily secured with the support metal fittings, and the wiring is processed at that stage. Then, after the wiring is completed, cover the opening of the container body with the lower cover, and fit the enclosure consisting of the projections and claws of the lower cover into the rectangular lower end of the support fitting. , sandwich the protrusion on the side of the holding box between the protrusion of the lower cover and the support metal fittings, fit the outer periphery of the lower cover to the container body, and screw together the protrusion of the lower cover and the back plate of the support metal fitting. Since the final tightening is done at the bottom end, it is easy to pick up the pilot holes for the screws, allowing for secure assembly.Also, even if a holding box is not installed, the wiring can be processed before installing the bottom cover, and then the bottom cover can be covered. The lower end of the rectangular support fitting is fitted around the protrusion, and the protrusion of the lower cover and the back plate are both fixed to the lower end of the support fitting with screws, thereby making it possible to firmly assemble the lower cover.

Embodiment Hereinafter, an embodiment of the present invention will be described based on the drawings.

Fig. 1 is a sectional view of essential parts of an electric water heater according to an embodiment of the present invention, Fig. 2 is a partially cutaway bottom view of the electric water heater, and Fig. 3 is a side view of the electric water heater. . In FIGS. 1 to 3, a cylindrical container 1 made of a thin plate of stainless steel or the like is attached at its upper edge to a ring-shaped spout 3 supported at the upper end of a cylindrical vessel body 2. It hangs down inside the vessel body 2. The container 1 and the spout 3 are covered by a lid 4 so as to be openable and closable. Further, a display board 5 consisting of a display section for displaying the status of the electric water heater and an operation section for operating the water heater is held between the container body 2 and the spout 3.

The bottom surface of the container 1 is formed into a concentric multi-tiered shape, and a flat donut-shaped heater 6 is attached to the middle part thereof with a presser metal fitting 6a. A plurality of support fittings 7 having a U-shape and a rectangular lower end are appropriately attached to the outer surface of the bottom of the container 1 near the outer periphery of the holding fitting 6a. Further, the terminal 8 of the heater 6 is provided so as to pass through a heat shield plate 9 installed at the bottom of the heater 6. On the outer surface of the highest central portion 10 of the multi-tiered bottom surface of the container 1, a heat plate 12, which is a good thermal conductor and has a heat resistance, is fitted with a thermistor 11 embedded therein. On the other hand, a temperature fuse 14 held by a holder 13 is fitted into a square hole provided in the heat shield plate 9, and is pressed against a part of the bottom surface of the container 1 by the spring action of the holder 13, so that the temperature of the container 1 is quickly adjusted. It is possible to convey this to Fuse 14. Further, a notch is provided at an appropriate position around the lower end of the container body 2, and a power terminal unit 15 is mounted therein. A lower cover 16 that covers the opening at the lower end of the vessel body 2
is fixed to the rectangular lower end of the support fitting 7 with a screw 17, and the container 1 is pulled downward and fixed.

A control electronic circuit section 19 is installed in a space approximately in the center of the lower cover 16 surrounded by a holding box 18, and projections 20 having a U-shaped cross section are provided on both outer surfaces of the holding box 18. The bottom piece is held between the support metal fitting 7 and the protrusion 22 of the lower cover 16, and both side pieces of the protrusion 20 are brought into contact with the outside of the support metal fitting 7. On the other hand, on the upper surface of the protrusion 22 of the lower cover 16 that holds the protrusion 20, an enclosure 23 is formed by a plurality of protrusions 22 having an inclined inner circumference 21 and claws 24. It fits into the rectangular lower end of the support fitting 7.
The claw 24 of the enclosure 23 is located on the center side of the container body 2, that is, on the side of the holding box 18. It is in contact with the back of 7.
A back plate 25 is attached to the outer concave portion of the lower cover 16 , and the screws 17 pass through the back plate 25 and also through the protrusion 22 of the lower cover 16 to attach the support fittings 7 .
It is screwed onto the lower end of the .

Since the structure is as described above, the assembly procedure is to first invert the container 1 and set it in an assembly jig (not shown), then attach the spout 3, display plate 4, and container body 2. Next, the holding box 11 is temporarily held by the support fitting 7 attached to the back surface of the container 1, and wiring work and wiring arrangement are performed here. At this point, there is no lower cover 16, so the work can be done easily.Finally, cover the lower cover 16 and back plate 25 and screw 1.
7, the protrusion 20 of the holding box 11 is clamped between the support fitting 7 and the lower cover 16, and
A firm assembly is easily completed by pulling the container 1 downward.

FIG. 4 shows another embodiment of the present invention for another type of electric water heater without control electronics. That is, the container 1, the container body 2, the support fitting 7, the lower cover 16, etc. are the same as those in the embodiment shown in FIGS. 1 to 3 above, except that the electronic circuit section 1
9, a thermostat 31 is attached to the center of the outer surface of the bottom of the container. Therefore, although there is no holding box in this case, if the lower cover 16 is attached to the container body 2 after wiring in the same way, the enclosure 23 with the claws 24 of the protrusion 22 will be attached to the lower end of the rectangle of the support fitting 7. The assembly is easily completed by fitting it into the section and tightening it with the screw 17.

Effects of the Invention As described above, in the electric water heater of the present invention, when a holding box for the control electronic circuit is used, it can be temporarily held by the support fittings attached to the outer surface of the bottom of the container, so the lower cover can be attached. It is very easy to assemble because wiring can be done beforehand, and even if a thermostat is used instead of the electronic circuit section, wiring can be done before installing the lower cover in the same way as above to make assembly easier. It is possible,
Furthermore, it has become possible to use the same structure for the main parts of a wide variety of products, such as electronically controlled electric water heaters and thermostatic electric water heaters, making it possible to reduce costs.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of essential parts of an electric water heater according to an embodiment of the present invention, Fig. 2 is a partially cutaway bottom view of the electric water heater, and Fig. 3 is a side view of the electric water heater. FIG. 4 is a partially cutaway bottom view of an electric water heater according to another embodiment of the present invention. 1... Container, 2... Vessel body, 3... Spout, 4...
Lid body, 5...Display plate, 6...Heater, 7...Supporting metal fittings, 16...Lower cover, 17...Screw, 22
... Protrusion, 23 ... Surrounding, 24 ... Claw, 25 ...
Back board.

Claims (1)

[Scope of utility model registration request] A container with a heater fixed near the bottom is attached to a spout supported by a container body and suspended inside the container, the container and spout are covered with a lid that can be opened and closed freely, and a display board is provided between the spout and the container body. A plurality of U-shaped support fittings each having a rectangular lower end are fixed to the outer surface of the bottom of the container, and the inner edge of the opening of the annular lower cover that covers the bottom opening of the container is , a protrusion facing the lower end of the support fitting is provided, the protrusion has a plurality of protrusions, one of which is a claw, and forms a bottomed enclosure, and the protrusion of the lower cover is surrounded by a protrusion; At the same time, fit the rectangular lower end of the support fitting, and bring the claw into contact with the back of the support fitting, and screw the protrusion of the lower cover and the back plate covering the opening of the lower cover onto the lower end of the support fitting. Fixed by
An electric water heater assembled by pulling the container downward.