JP2565320Y2 - Water heater exterior - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an exterior body of a water heater.

[0002]

2. Description of the Related Art Conventionally, an electric water heater is provided with an exterior body around a hot water tank in order to prevent infiltration of rainwater when installed outdoors. This exterior body is, for example,
As shown in JP-A-52283, lids are respectively attached to the upper and lower sides of a cylindrical case body. The upper lid is mounted so that the flange of the upper lid is positioned on the outer periphery of the case body, and the lower lid is mounted on the flange of the lower lid in order to prevent rainwater or the like from entering through the gap between the lid and the case body. Is mounted on the inner periphery of the case body. The upper lid and the lower lid have the same shape, and the blank mold and the drawing mold can be used in common, so that the cost of the mold can be greatly reduced.

On the other hand, as a safety device against water leaks caused by corrosion of a hot water tank and water leaks at pipe connections such as water supply pipes and drain pipes, as shown in Japanese Utility Model Publication No. 57-10368, A water receiver is provided at the lower part of the water heater, and a detector for detecting the water level of the water leak is provided at the water receiver, and a solenoid valve in a water supply pipe of the water heater is operated based on a detection signal of the detector, and a water supply pipe is provided. The flow path is closed to stop the pressure water supply.

[0004]

However, the above-described rainwater intrusion prevention structure and water leakage prevention structure have the following problems. That is, first, the rainwater infiltration prevention configuration is the configuration disclosed in Japanese Utility Model Publication No. 55-52283, and when packing for transportation, particularly when using a truck without holo, the operator needs to install the water heater body. There is a case where a foot is hung on the upper lid when a seat is hung to prevent rainwater intrusion. In this case, since the upper lid is formed of a relatively thin sheet metal and is a flat plate, it is weak in strength and may deform the upper lid. As a result, there is a problem that rainwater enters the main body case from a portion corresponding to the hot water supply pipe and adversely affects electrical components and the like.

[0005] Next, with respect to the structure for preventing water leakage, Japanese Utility Model Publication No.
According to the configuration disclosed in JP-A-7-10368, a water leakage receiver for receiving water leakage due to water leakage due to destruction of the hot water tank or the like must be provided as a separate component, and the bottom of the water leakage receiver is formed flat. Therefore, there is a problem that the response of the detector is inferior.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and it is possible to reliably prevent rainwater from entering without deteriorating material collection and to quickly cope with water leakage due to breakage of a hot water tank. An object of the present invention is to provide an exterior body of a water heater.

[0007]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a main body case in which a hot water tank is housed and the upper side is formed in a cylindrical shape having a slightly smaller diameter than the lower side. An upper concave opening for closing the upper opening from the outside, and a concave lower lid for closing the lower opening of the main body case from the inside, wherein the upper lid and the lower lid have the same diameter. The hot water supply port is formed in a convex shape, and the drain port of the lower lid or the water leak sensor mounting portion is formed in a concave shape having the same shape as the convex shape of the hot water port of the upper lid.

[0008]

According to the present invention, an upper lid and a lower lid for closing the upper opening of the main body case and the lower opening of the main body case are formed to have the same diameter, and the hot water supply opening of the upper lid is formed in a convex shape. By making the drain port or water leak sensor mounting part of the convex shape of the same shape as the convex shape of the hot water supply port of the upper lid,
The upper lid and the lower lid can share material. In addition, the upper lid side has a convex shape to increase the strength, prevent deformation due to external force, and allow rainwater to flow out of the body smoothly. On the other hand, by making the lower lid side concave, it is easy to receive water leakage, and the responsiveness of the water leakage sensor can be improved.

[0009]

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

FIGS. 1 and 2 show a first embodiment. In the drawings, reference numeral 1 denotes a cylindrical hot water tank having a closed upper surface and a lower surface. 3 are attached respectively. A water supply pipe 4 connected to a water source (not shown) is connected to the water supply pipe 2, and an electromagnetic valve 5 is provided in the middle of the water supply pipe 4. A heating element 6 is attached to the lower part of the inside of the hot water tank 1, and a hot water supply pipe 7 is attached to the center of the uppermost part.

Reference numeral 8 denotes a main body case which covers the outer periphery of the hot water tank 1. The main body case 8 is formed by joining a flat plate whose upper side is slightly narrower than the lower side into a cylindrical shape so that the upper side has a slightly smaller diameter than the lower side. It is formed in a shape. Reference numeral 9 denotes an inverted concave upper cover for closing the upper opening of the main body case 1 from the outside. I have. 12
Is an umbrella-shaped packing made of rubber or the like provided at the hot water supply port 10.

Reference numeral 13 denotes a concave lower lid for closing the lower surface opening of the main body case 1 from the inside. The central part of the lower lid 13 receives rainwater and water leakage such as water leakage caused by corrosion or deformation of the hot water tank. A discharge port 14 for discharging water and a recess 15 for facilitating water leakage are provided. The upper lid 9 and the lower lid 13 have the same outer dimensions of φA, and the convex part 11 and the concave part 15 provided on the upper lid 9 and the lower lid 13 are formed in the same shape. Reference numeral 16 denotes a discharge pipe attached to the discharge port 14 via a packing 17.

Reference numeral 18 denotes a water leak sensor.
Has two downward electrodes 19, 19, and the lower lid 13
Is provided in the concave portion 15. Reference numeral 20 denotes a water leak detector which sends a signal to the solenoid valve 5 based on a detection signal of the water leak sensor 18 to close the solenoid valve 5 to automatically stop water supply, thereby coping with a water leak accident of the water heater. is there.

Next, the operation will be described.

[0015] First, in the case of packing by transporting by a hololess truck, when an operator puts a seat on the main body of the water heater to prevent rainwater from entering, even if the work is performed by putting a foot on the upper lid, the upper lid 9 may be used. Is not deformed because the strength is reinforced by the convex portions 11. Therefore, since there is no gap between the hot water supply pipe 7 and the hot water supply port 10, when installed outdoors, rainwater does not enter the main body case 8 and does not adversely affect electrical components and the like. Further, the rainwater is guided to the convex portion 11 of the upper lid 9 outside the container as shown by an arrow, and can smoothly flow out of the container.

If water leaks due to corrosion of the hot water tank 1 or water leaks at pipe connections such as the water supply pipe 2 and the drain pipe 3, as shown in FIG. Collected in the recess 15 and quickly the electrodes 19,
19 becomes conductive due to water leakage.
8, a signal is sent to the solenoid valve 5 to shut off the solenoid valve 5 with good responsiveness and automatically stop water supply.

The rainwater intrusion prevention structure and the water leakage prevention structure have an upper lid 9 and a lower lid 13 having the same outer diameter.
In this case, when the upper lid 9 and the lower lid 13 are manufactured, the blank type and the drawing type can be used in common.

The shape of the convex portion 11 and the concave portion 15 of the upper lid 9 and the lower lid 13 is a two-stage shape shown in FIG.
It may be formed in an umbrella shape shown in FIG. Also, the lower lid 13
It is not always necessary to provide the discharge port 14 in the concave portion 15 of FIG.

[0019]

[Effect of the Invention] According to the exterior body of the water heater of the present invention, the blank type and the drawing type of the upper lid and the lower lid can be used in common, so that the mold cost can be reduced significantly and the price at the time of material purchase can be reduced. it can. Furthermore, it is possible to reliably prevent rainwater from entering, and to quickly respond to water leakage due to corrosion of the hot water tank.

[Brief description of the drawings]

FIG. 1 is a vertical sectional view of the electric water heater of the present invention.

FIG. 2 is an explanatory diagram of the same operation of the water leakage sensor.

FIG. 3 is a sectional view showing a second embodiment of the upper cover and the lower cover.

FIG. 4 is a cross-sectional view showing a third embodiment of the upper and lower lids.

[Explanation of symbols]

 1 Hot water tank 3 Body case 9 Upper lid 11 Convex part 13 Lower lid 15 Concave part

Claims (1)

(57) [Scope of request for utility model registration] 1. A main body case containing a hot water tank and having an upper side formed in a cylindrical shape having a slightly smaller diameter than a lower side, an inverted concave upper lid for closing an upper surface opening of the main body case from the outside,
A concave lower lid for closing the lower opening of the main body case from the inside, wherein the upper lid and the lower lid have the same diameter, wherein the hot water supply port of the upper lid is formed in a convex shape, and An exterior body of a water heater, wherein a drain port or a water leak sensor mounting section is formed in a concave shape having the same shape as a convex shape of the hot water supply port of the upper lid.