JPH0337546Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Field of Application The present invention relates to an electric water heater that heats and keeps a stored liquid warm.

BACKGROUND ART Conventional electric water heaters of this type are equipped with a reflector in order to improve heat retention efficiency, and the reflector is attached using a configuration as shown in FIG. 4. That is, a mounting plate 102 is provided on the bottom of the container 101, and a reflective plate 103 made of a thin plate with high reflectance is wrapped around the container 101.
The claw portion 104 of this reflective plate 103 is attached to the mounting bracket 105.
The reflecting plate 103 was fixed by inserting it into a mounting hole 106 provided in the mounting plate 102 and fixing the mounting fitting 105 to the mounting plate 102 with screws or the like.

Problems to be Solved by the Invention However, in such a conventional configuration, there was a problem in that it was difficult to insert the claws 104 of the reflector 103 into the mounting holes 106 of the mounting bracket 105. For this reason, only about two mounting holes 105 can be provided, and as a result, the fixation is only partial, so that the reflector 103 is deformed in areas other than the claws 104, and this deformation causes the reflector 103 to be attached to the container 104.
As a result, the heat of the container 101 was released through the reflection plate 103, reducing the heat retention efficiency. In addition, in order to prevent this, the reflector 10
3, the degree of roll processing must be increased to improve roundness, which leads to an increase in costs. Further, since the reflecting plate 103 is made of a thin plate, it has many problems, such as the protruding claws 104 being easily deformed.

This invention solves these problems,
It is an object of the present invention to provide an electric water heater that can improve heat retention efficiency, is easy to assemble, and is inexpensive in terms of cost.

Means for Solving the Problems In order to solve the above problems, the present invention includes a pipe projecting from the bottom of a cylinder with a bottom inside the outer body of the container, which is held between an upper spout and a lower bottom plate. Equipped with a container having a heat surface, a heating element is attached to the back side of the bottom of the container, the bottom of the container is covered with a heat shield, and a plurality of outwardly protruding A cylindrical tube is provided with a convex claw, and is arranged around the container by the heat shield claw and the spout, and has a notched recess corresponding to the heat shield claw. It has a reflective plate in between.

Effect: According to this configuration, the reflector plate is securely fixed to the container at a constant distance, and the bottom surface is also covered with a heat shield plate, so heat retention efficiency is improved and assembly workability is also improved. Moreover, it can be obtained at low cost.

Embodiment Hereinafter, an embodiment of the present invention will be described based on the accompanying drawings. In Figs. 1 to 3, 1 is a cylindrical outer container body, and a spout 2 is fixed to the upper opening of the outer container body 1, and a bottom plate 3 is integrally attached to the lower end. . Reference numeral 4 denotes a bottomed cylindrical container installed inside the container outer body 1. This container 4 has a flange portion 5 at the upper end and is supported by the spout 2 via a container packing 6. The bottom surface of the container 4 has a heat transfer surface 4a projecting inward, and the back side of the bottom surface of the container 4 is insulated with an insulating plate made of mica or the like, and is integrally attached via an aluminum plate or the like. A heating element section 9 consisting of a main heater 7 and a heat-retaining heater 8 is installed. Reference numeral 10 denotes a heat shield plate that covers the outer surface of the lower part of the container 4.
It is pressed and held by a spring (not shown) attached to. 12 is a thermal reed switch for controlling the heat-retaining heater 8; 13 is a temperature fuse; this temperature fuse 13 and the thermal reed switch 12 are pressed and held against the bottom surface of the container 4 by a pressing spring 14. Reference numeral 15 designates a plurality of convex claw portions formed by extending a portion of the outer peripheral edge of the heat shield plate 10, and the claw portions 15 are L-shaped by extending a portion of the outer peripheral edge of the heat shield plate 10. A step 16 is provided so that the width of the portion beyond this bent portion becomes smaller in the middle. On the other hand, around the container 4, a reflector plate 17 formed into a substantially cylindrical shape by spot welding or bending the ends of a thin plate is disposed, and this reflector plate 17 is a heat shield plate. A notch recess 18 is provided at a position corresponding to the claw part 15 of 10, and the upper part of this reflection plate 17 is supported by the groove 2a of the spout 2,
The lower portion is supported by the bent tip portion 15a of the claw portion 15 of the heat shield plate 10. That is, the cylindrical reflection plate 17 is held between the claw portion 15 of the heat shield plate 10 and the spout 2. Further, movement of the reflection plate 17 toward the container 4 side is restricted by a step 16.

The cylindrical reflector 17 covers the entire side surface of the container 4, excluding the parts attachment parts such as the attachment part of the temperature regulator 19, and connects the heat shield plate 10 and the spout 2 at a certain distance from the container 4. covered in between. To attach the heat shield plate 10 to the container 4, the heat shield plate 10 is set under the container 4, and the reinforcing metal fittings 21 are attached to the container mounting plate 20, which is attached to the container 4 by spot welding or the like. Board 1
This is done by holding down the 0 and fixing it with a screw or the like. Further, the reinforcing metal fittings 21 are fixed to the bottom plate 3 with screws or the like, thereby fixing the container 4 into the container outer body 1 from the lower part.

Effects of the Invention As is clear from the above embodiments, according to the present invention, a plurality of convex claws projecting outward are provided on the outer peripheral edge of the heat shield plate that covers the bottom surface of the container. The claws and the spout hold a cylindrical reflector that is placed around the container and has a notched recess corresponding to the claw of the heat shield plate, increasing heat retention efficiency. The reflector plate can be securely fixed to the container at a certain distance, which not only improves quality but also eliminates the need for special parts for attaching the reflector plate. This is made possible by processing the heat shield plate, which is a component.
As a result, the cost can be significantly reduced and the product can be provided at a low price.

[Brief explanation of the drawing]

Fig. 1 is an exploded perspective view of the main parts showing the assembly of an electric water heater according to an embodiment of the present invention, Fig. 2 is an enlarged exploded perspective view of the main parts of the water heater, and Fig. 3 is a vertical sectional view of the water heater. , FIG. 4 is an exploded perspective view of essential parts of a conventional electric water heater. 1... Container outer body, 2... Spout, 3... Bottom plate, 4
... Container, 9 ... Heating element section, 10 ... Heat shield plate, 1
5...Claw portion, 17...Reflector plate, 18...Notch recess.

Claims (1)

[Scope of utility model registration request] A container with a bottomed cylindrical shape and a heat transfer surface protruding from the bottom is equipped inside the container outer body which is held between an upper spout and a lower bottom plate, and a heating element is attached to the back side of the bottom of the container. and the bottom surface of the container is covered with a heat shield plate, and a plurality of convex claws projecting outward are provided on the outer peripheral edge of the heat shield plate, and the claws of the heat shield plate and the spout are connected. An electric water heater comprising a cylindrical reflecting plate disposed around the container and having a notched recess corresponding to the claw part of the heat shield plate.