JP2749386B2 - Electric water heater - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric water heater used in ordinary households and the like.

2. Description of the Related Art As a conventional electric water heater of this type, for example, a structure as shown in FIG. 3 is known. That is,
The electric water heater shown in this drawing is attached to a substrate 3 provided inside a display panel 2 above a cylindrical body 1 made of metal, or a substrate (not shown) provided inside the lower end of the body 1. The operation and display are performed by the switch 4 and the light emitting diode 5, and the microcomputer 6 and the like for driving them are mounted on another substrate 8 provided below the container 7 supported inside the body 1. The leads 3 and 8 were connected by a plurality of lead wires 9.

Problems to be Solved by the Invention In such a conventional configuration, since the substrates 3 and 8 are separately manufactured and a member for supporting them is required, the configuration is complicated as a whole, and a factor of cost increase. In addition, since the lead wires 9 for connecting the two substrates 3 and 8 separately provided are required, there is a problem that a connection failure occurs at a connection portion.

An object of the present invention is to provide an electric water heater that can solve the above problems.

Means for Solving the Problems In order to solve this problem, the present invention provides a container with a heater inside a cylindrical container, covers the lower end opening of the container with a dish-shaped lower cover below the container, In the space between the lower cover and the container, a substrate on which the electronic components are arranged on one side and the light emitting diode and the switch are arranged on the other is located, and these electronic components, the light emitting diode and the switch are surrounded by a wiring cover, The wiring cover faces the hole on the side surface of the lower cover and is locked to the inner surface of the lower cover. Further, the wiring cover is urged to the inner surface of the lower cover by a pin provided on the lower cover, and the substrate and the lower cover are connected via the wiring cover. Are integrated.

Operation According to the above configuration, the wiring cover and the board are integrated with the lower cover covering the lower opening of the body of the electric water heater by the pins provided on the lower cover, and the wiring cover and the board are always attached to the inner surface of the lower cover. By energizing the switch, the operation accuracy of the switch is improved.Electronic components, light emitting diodes and switches are surrounded by a wiring cover, so that they are not exposed to water, etc., and are divided as in the past. This eliminates the need for lead wires and connectors for connecting the substrates, thus significantly improving the reliability of the product, achieving a very simple and rational configuration, and reducing costs.

In addition, by providing the operation switch near the lower end of the body, the stability at the time of operating the switch is improved as compared with the case where the switch is provided at the upper end of the body, and therefore, the body is overturned. Danger such as can be prevented.

Embodiment Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

1 and 2, a cylindrical container 11 formed of a thin plate of stainless steel or the like is supported inside a cylindrical container 12 also. The bottom surface of the container 11 is formed in a multi-tiered hill concentric with the center of the container 11, and a donut-shaped flat heater 13 is held at an intermediate portion of the heater 13 from below by a holding metal 14, and an outer periphery of the holding metal 14 A plurality of U-shaped support plates 15 are appropriately attached to the outer surface of the bottom of the container 11 in the vicinity.

The lower end opening of the vessel 12 is covered with a dish-shaped lower cover 17 attached to the lower end of the support plate 15 with screws, and by attaching the lower cover 17, the container 11 is pulled downward and fixed. I have.

In a substantially central space between the lower cover 17 and the bottom of the container 11,
A hot water temperature control device 19 is provided. The hot water temperature control device 19 includes a wiring cover 20 locked to the lower cover 17 and a wiring cover 20.
And a microcomputer 21 for controlling hot water, a switch 23 for operation, and a light emitting diode 24 for lighting the status of hot water.

On one end side of the substrate 21 near the inner peripheral surface of the lower cover 17,
Two vertically extending V-grooves 25 are provided in parallel, and the V-grooves 25 are engaged with the V-grooves 27 of the projections 26. In this state, the substrate 21 is fixed to the wiring cover 20 by being screwed to a projection 28 projecting from the lower surface of the wiring cover 20 in this state.

Also, the pins 30 protruding upward from the lower cover 17
The wiring cover 20 is fitted in the hole 20a of the wiring cover 20 through the hole 21a, and the wiring cover 20 is pressed by the pins 30 in a direction in which the wiring cover 20 comes into contact with the inner peripheral surface of the lower cover 17.

In some cases, the pins 21 may be fitted into the holes 21a of the board 21 to press the board 21 in a direction in which the board 21 also contacts the inner peripheral surface of the lower cover 17.

By the way, the switch 23 and the light emitting diode 24 are provided adjacent to the V groove 25, and the switch 23 is
It is in contact with the switch piece 31 provided on 17 and the light emitting diode
24 is fitted in a hole 32 on the side surface of the lower cover 17, and the switch 23 can be operated from outside the body 12,
The light emitting diode 24 can display the operation result and the state of hot water temperature to the outside by flashing.

Generally, the switch 23 provided on the substrate 21 has a very small ON / OFF operation stroke,
Although the positional relationship between the switch 31 and the switch 23 requires an extremely small interval, the V-groove 25 near the switch 23 is supported by the pin 30 or the screw 29 in the V-groove 27 of the projection 26 without any gap.
The positional relationship between the switch piece 31 and the switch 23 can be maintained extremely accurately. Similarly, the light emitting diode 24 has the hole 32
It is fitted with high precision.

The lower cover 17 and the wiring cover 20 may be formed integrally. In short, it is only necessary that the switch 23 can be accurately maintained at a predetermined interval with respect to the switch piece 31.

Reference numeral 33 in the drawing denotes a rotatable ring-shaped cradle that is engaged with the groove 34 on the lower surface of the lower cover 17 and is rotatable.

Effect of the Invention As is apparent from the above description, the present invention integrates the wiring cover and the board with the pins provided on the lower cover covering the lower end opening of the body of the electric kettle, and forms the wiring cover and Since the substrate is always urged against the inner surface of the lower cover, stability and operation accuracy at the time of switch operation can be improved, and a lead for connecting each divided substrate as in the related art is used. Since wires and connectors are not required, the reliability of the product is remarkably improved, the configuration is extremely simple and rational, and the cost can be reduced.

Further, by providing the operation switch near the lower end of the body, the stability of the body when the switch is operated is improved as compared with the case where the switch is provided at the upper end of the body. The danger of falling down of the body can be prevented.

[Brief description of the drawings]

1 and 2 show an embodiment of the electric water heater of the present invention. FIG. 1 is an enlarged sectional view of a main part, FIG. 2 is a plan view of a substrate, and FIG. 3 is a conventional electric water heater. It is a principal part notched side view of a container. 11 ... container, 12 ... body, 13 ... heater, 17 ... lower cover, 19 ... hot water temperature control device, 20 ... wiring cover, 21 ... board, 22 ... microcomputer, 23 ... switch , 24 ... light emitting diode, 32 ... hole.

 ────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kaoru Maekawa 1006 Kazuma Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. 40431 (JP, U) Actually open 1-91440 (JP, U)

Claims (1)

(57) [Claims] A container with a heater is provided in a cylindrical container, a lower end opening of the container is covered with a dish-shaped lower cover below the container, and electronic components are provided in a space between the lower cover and the container. On one side, a substrate on which the light emitting diode and the switch are respectively arranged is located, and these electronic components, the light emitting diode and the switch are surrounded by the wiring cover, and the wiring cover is exposed to the hole on the side of the lower cover. An electric water heater that is locked to the inner surface of the cover, and further urges the wiring cover toward the inner surface of the lower cover by pins provided on the lower cover, and integrates the substrate and the lower cover via the wiring cover.