JP2003052540A - Electric water heater - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electric water heater preventing the grounding effect from being reduced in what way its ground lead is handled. SOLUTION: A ground lead 8 provided in a container 6 is connected to a magnetically attractable plate 3 provided in a peg frame 2 on the side surface of a body 1 and a ground lead 19 is connected to a magnet type plug 17 for an earth-and-feeder combination cord 18 without using a screw, which magnet type plug 17 is integrally formed with the ground lead 18 and is inserted into the peg frame 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric water heater, and more particularly to a method of providing a ground.

[0002]

2. Description of the Related Art FIG. 5 is a side view of a conventional electric water heater of this type. Further, FIG. 6 is an enlarged cross-sectional view of a C portion indicated by a circle in FIG. In FIG. 5 and FIG. 6, an L-shaped metal fitting 52 is fixed to the lower part of a container 51 containing a heater and containing a liquid, and the metal boss 5 is attached to one end of the metal fitting 52.
3 was provided, this was penetrated to the body 54, and the external earth wire 55 was attached here with the screw 56. Reference numeral 57 is a turntable provided at the bottom of the body 54.

In the conventional structure, it is difficult to insert the metal boss 53 of the L-shaped metal fitting 52 fixed to the lower portion of the container 51 into the through hole of the body 54, and the rotary table 57 is used. When the body 54 rotates, the ground wire 55 provided outside is pulled, twisted, or rotated, so that there is a problem that the screw 56 screwed is loosened and the grounding effect is impaired. It was

For this reason, although a means via a spring washer is often used for the screw 56, it is said that the ground wire 55 is cut by bending at the root of the screw 56, and it cannot be said that this is essentially solved. , Not perfect.

Further, since the ground wire 55 is fixed to the electric water heater, the electric water heater cannot be moved to the water inlet when absorbing water, which is inconvenient.

[0006]

DISCLOSURE OF THE INVENTION The present invention is to solve the above-mentioned conventional problems and to connect an electric water heater at the same time as an electric connection without screwing an external ground wire, thereby providing a simple and reliable connection. It is an object of the present invention to provide an electric water heater that does not fall over even if the cord is caught without applying a force to the ground wire.

[0007]

As a means for solving the above-mentioned problems, the present invention relates to an electric water heater having a container containing a liquid provided with a heater at the bottom in a body, wherein the electric water heater has a heater. A power supply lead wire for supplying power and a grounding lead wire are provided, and the power supply lead wire is in the power supply cord in a plug in which the power supply cord and the ground wire are integrated and the grounding lead wire is the plug. The plug and the electric water heater are electrically connected to the ground wires inside thereof at the same time as the magnets are attracted to the ground wires. Therefore, no matter how the ground wire integrated with the power supply cord is handled, it never loosens.

Further, even if the earth wire is not applied with force and the power cord for earthing is caught, the electric water heater will not fall down, only the magnet type plug will fall off.
Furthermore, the assembly can be facilitated.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The object of the present invention can be achieved by the constitutions described in each claim, and the embodiments will be described below by adding the function and effect to the constitutions of the claims.

The electric water heater according to claim 1 is an electric water heater in which a container for containing a liquid having a heater at the bottom is built into a body, wherein the electric water heater has a power supply lead wire and a ground lead wire for supplying power to the heater. The power supply lead wire is provided in the power supply cord in a plug in which a power supply cord and a ground wire are integrated, the ground lead wire is provided in the ground wire in the plug, and the plug is respectively provided. Since it is configured to conduct electricity at the same time as the magnet is attracted to the electric water heater, there is no need to bother fixing a separate ground wire with a screw.

According to a second aspect of the present invention, a grounding lead wire that is electrically connected to the heater is connected to an attraction plate inside a peg frame provided in a recess on the side surface of the body, and the attraction plate is a magnet on the peg frame. Is connected to the contact point of the magnetic pole plate in the plug of the three-core grounding power supply cord composed of the grounding wire adsorbed and locked by the two power supply cords, and the opposite end of the grounding power supply cord from the plug. The 3-pin plug provided on the terminal has a ground blade that connects the ground receptacle of the outlet to the ground wire of the power cord that also serves as the ground. Therefore, no matter how you handle the power cord and the ground wire, never loosen it. There is no. Further, even if the earth wire is not applied with force and the power supply cord for earth is caught, the electric water heater does not fall down because the magnet type plug only comes off, and the assembly can be facilitated.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a sectional view of an essential part of an electric water heater according to an embodiment of the present invention, FIG. 2 is an extension of the cord shown in FIG. 1, and FIG. 3 is a sectional view of an essential part A of FIG. FIG. 1 is a cross-sectional view taken along plane D of FIG.
FIG. 3 is a side view of the electric water heater of the present invention.

In FIG. 4, in the vicinity of the rear bottom of the body 1 obtained by integral molding with the thermoplastic resin of the main body of the electric water heater, a peg frame made of a thermosetting resin having a side opening is formed. 2 is provided, and a suction plate 3 is provided at substantially the center of the peg frame 2 as shown in FIG. Further, a rotary table 4 is provided on the bottom of the body 1 to make the main body easy to use.

FIG. 1 is a sectional view of an A portion indicated by a circle in FIG. 4 when FIG. 3 is viewed from the B direction. In the figure, a container 6 having a heater 5 at the bottom or the like is hung in a body 1 obtained by integrally molding a tubular resin. At the bottom of the container 6, there is a grounding lead wire 8 fixed by a screw 7, and the other end of the grounding lead wire 8 is in the shape of a box having a side opening provided on the lower rear side of the body 1. It is connected to the suction plate 3 mounted in the peg frame 2 with a screw 15. The suction plate 3
Conductive corners 9 and 10 are fixed to the bottom of the peg frame 2 on both sides of the contact points 11 and 12, respectively, and contact points 11 and 12 are provided at the ends of the corners 9 and 10 on the release side, respectively. Power supply lead wires 13 and 14 are connected to the ends, respectively. 1
Reference numeral 6 is a ground terminal welded to the surface of the suction plate 3.

A magnet type plug 17 matching with this is fitted on the peg frame 2, and a ground wire 19 of a grounding / power supply cord 18 which conducts to an external ground terminal is fitted in the center of the magnet type plug 17. Is a magnetic pole plate 2
It is connected to 0. 21 is another magnetic pole plate,
A permanent magnet 22 made of ferrite or the like is provided between the two. At the tips of the magnetic pole plates 20 and 21 protruding from the magnet type plug 17, the earth terminal 16 of the attraction plate 3 is provided.
Contact points 23, 24 are provided for contacting the. In addition, conductive contact plates 27 and 2 having contacts 25 and 26 provided on Z-shaped tip planes in spaces on both sides of the magnetic pole plates 20 and 21.
8 is provided, and power supply cords 29 and 30 are wired to the other ends of the contact plates 27 and 28. Magnet type plug 1
When 7 is inserted into the peg frame 2, the permanent magnet 22 is used to make the magnetic pole plate 20,
21 is attracted to the suction plate 3, and the contact 2 of the contact plates 27 and 28
5, 26 also contact the contacts 11, 12. The 3-pin insertion plug 31 has a ground blade 32 and plug blades 33 and 34, which are respectively connected to the ground wire 19 and power supply cords 29 and 3.
0 is wired. On the other hand, the outlet 3 provided on the wall 35
6 has an earth receiver 37 and external power supply receivers 38 and 39, which correspond to the earth blade 32 and the stopper blades 33 and 34.

As described above, since the container 6 and the external ground terminal are electrically connected to each other, even if the heater 5 should fail, electricity flows to the ground wire 19 for safety. A back plate 40 is provided on a part of the bottom surface of the body 1 and is fixed to the bottom of the body 1 after the screw 7 is tightened.

Since the present invention is constructed as described above,
Since it can be connected to an external ground wire only by locking the magnetic type plug 17 with a ground to the peg frame 2 of the body 1, no matter how the ground wire is handled, it never loosens. In addition, even if the cord is hooked, the electric water heater will not fall over and it is safe.

Since the ground wire 19 is electrically connected without being screwed, the ground wire 19 may be twisted or bent,
Even if the pulling force works, it will not loosen and the electrical connection will be maintained forever. Furthermore, since the screw is not used to fix the ground wire, there is no need to worry about loosening it.

[0020]

As described above, according to the present invention, the ground lead wire provided in the container provided with the heater for heating the liquid to be contained is connected to the ground wire in the magnet type plug. Never handle the ground wire and never loosen it. In addition, the electric water heater does not fall down even if the cord is hooked, and is safe. Furthermore, when water is supplied, the ground can be removed by simply removing the plug, and the electric water heater can be moved to the water supply port.

[Brief description of drawings]

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

FIG. 2 is a cross-sectional view of a main part of an extension portion of a power cord that also serves as a ground.

FIG. 3 is an enlarged cross-sectional view of a portion A indicated by a circle in FIG.

FIG. 4 is a side view of an electric water heater according to an embodiment of the present invention.

FIG. 5 is a side view of a conventional electric water heater.

6 is an enlarged cross-sectional view of a C portion indicated by a circle in FIG.

[Explanation of symbols]

1 body 2 peg frames 3 Adsorption plate 5 heater 6 containers 8 Ground lead wire 17 plug 18 Grounding power supply cord 20,21 Magnetic pole plate 29,30 power supply cord 31 3-pin plug 32 ground blade 33, 34 blades 36 outlets 37 Earth receiver 38,39 External power supply

Claims (2)

[Claims] 1. An electric water heater in which a container containing a liquid having a heater at the bottom is built in a body, wherein the electric water heater is provided with a power supply lead wire for supplying power to the heater and a grounding lead wire. The lead wire is attached to the power supply cord in the plug that integrally incorporates the power supply cord and the ground wire, and the ground lead wire is attached to the ground wire in the plug by the magnetic attraction of the plug and the electric water heater, respectively. An electric water heater characterized by being configured to conduct electricity at the same time. 2. A grounding lead wire connected to a heater is connected to a suction plate in a peg frame provided in a recess on the side surface of the body,
The attraction plate is electrically connected to the contact point of the magnetic pole plate in the plug of the three-core grounding power feeding cord composed of a grounding wire attracted and locked to the peg frame by a magnet and two power feeding cords, and the grounding. 2. The 3-pin plug provided on the opposite end of the plug of the dual-purpose power supply cord is provided with a ground blade for electrically connecting the ground receptacle of the outlet to the ground wire of the dual-purpose power supply cord. Electric water heater to do.