JPH0429336Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial field of application) This invention relates to a water heater, and more specifically, to an improvement of the drain structure in a water heater.

(Prior art and its problems) Conventionally, when hot water is boiled in the case of a water heater, a safety valve has been provided to release expanded water when the pressure inside the case becomes abnormally high. The expanded water is discharged to the outside through a vinyl hose, etc. However, since the safety valve is designed to close instantaneously, a vacuum is created inside the vinyl hose at that time, causing water to leak inside the vinyl hose. In winter, this residual water may freeze inside and clog the vinyl hose, and in such cases, even if the pressure inside the casing becomes high, the expanded water will be released through the safety valve. There was a problem in that the casing could crack due to abnormal pressure, causing accidents such as water leakage from the casing.

(Means for Solving the Problems) The present invention was devised in view of the above-mentioned conventional problems, and provides a water heater equipped with a drain pipe that can effectively drain water from inside the vinyl hose. The purpose of the water heater is to provide a water heater equipped with a safety valve that releases expanded water inside the housing, and a drain pipe that is connected to the safety valve via a heat-resistant hose and protrudes outside the machine. A slit portion for sucking out water remaining in the heat-resistant hose is formed in the heat-resistant hose.

(Function) A slit is formed in the drain port pipe connected to the safety valve via a heat-resistant hose, and even when the safety valve is momentarily closed and water remains inside the heat-resistant hose, this slit allows the heat-resistant hose to The remaining water can be effectively sucked out and discharged from the drain pipe, and no water remains inside the heat-resistant hose, and the heat-resistant hose will not get clogged due to freezing even in winter. , the safety valve can function well.

(Example) Hereinafter, an example of the present invention will be described based on the drawings.

FIG. 1 is a cross-sectional configuration diagram of the main parts of the water heater. In the figure, an exterior panel 1 forming the outer wall of the water heater
A tank-shaped case 2 that can boil water is built into the inside of a, and a water passage 2a through which hot water passes is formed on the inner surface of the side wall of this case 2.
A connecting pipe 4 is connected to the connecting pipe 4 via a cap nut 3 in communication with the connecting pipe 4, and a safety valve 5 is attached to the connecting pipe 4.

This safety valve 5 is capable of instantaneously and automatically opening and closing when the pressure inside the housing 2 becomes higher than a certain value, allowing the expanded water inside the housing 2 to escape to the outside. Further, this safety valve 5 is provided with a manual lever 5a, and by manually operating this manual lever 5a, it is possible to open the safety valve 5 and release hot water in the housing 2. . A heat-resistant vinyl hose 6 is connected to the outlet side of the safety valve 5, and an L-shaped drain pipe 7 is connected to the heat-resistant vinyl hose 6. This drain pipe 7 is attached from the outside of the exterior panel 1a, and protrudes from the exterior panel 1a. A hopper 8 is arranged at the lower part of the drain pipe 7, and the expanded water is discharged through the hopper 8 to a drain groove (not shown) or the like.

In this example, the drain pipe 7 is formed in a shape as shown in a perspective view in FIG. 2 and in a front view in FIG. 3.

That is, the drain pipe 7 is L-shaped and made of vinyl chloride or the like, and includes a horizontal pipe portion 7a attached orthogonally to the exterior panel 1a;
It is composed of a hanging pipe part 7b bent by 90 degrees from the horizontal pipe part 7a, and a step-like engagement step part 9 is formed at the tip of the horizontal pipe part 7a.
This engagement stepped portion 9 is fitted into the tip of the heat-resistant vinyl hose 6. Also, the horizontal pipe section 7
A is provided with a protruding flange 10, and four locking pieces 11 are formed on the flange 10. This locking piece 11 is an elastic member, and when the horizontal pipe portion 7a is inserted from the outside into a hole (not shown) formed in the exterior panel 1a, this locking piece 11 is locked in the hole. It can be installed by Further, at that time, the flange portion 10 comes into contact with the exterior panel 1a.

A slit portion 12 is formed in an opening shape in the axial direction on the inner side wall of the hanging tube portion 7b, and this slit portion 12 has a notch shape from the inner end of the horizontal tube portion 7a to the tip of the hanging tube portion 7b. At the tip of the slit portion 12, a notch portion 13 cut out in an inclined shape is continuously formed.

If the drain pipe 7 with this shape is connected to the heat-resistant vinyl hose 6 and installed, the housing 2
When the pressure inside becomes high and the safety valve 5 is activated and the expanded water escapes to the heat-resistant vinyl hose 6, when the safety valve 5 is momentarily closed, the inside of the heat-resistant vinyl hose 6 becomes a vacuum state, and the heat-resistant vinyl hose 6 The water inside the hose 6 cannot drain out, and residual water remains inside the heat-resistant vinyl hose 6.
In this example, the residual water in the heat-resistant vinyl hose 6 is effectively sucked out by the slit portion 12 and cutout portion 13 formed in the drain pipe 7 and falls into the hopper 8, thereby effectively draining the water. It can be removed. That is, the slit portion 12 is the horizontal tube portion 7a.
Since the slit portion 12 is cut into the inside of the hose and formed into an opening shape, when the residual water in the heat-resistant vinyl hose 6 gradually flows down to the horizontal pipe portion 7a of the drain pipe 7, the slit portion 12 absorbs this flowing water due to capillary action. The residual water inside the heat-resistant vinyl hose 6 can be sucked out and dropped downward as water droplets at the lower notch 13, and the residual water inside the heat-resistant vinyl hose 6 can be effectively drained with a simple structure. safety valve 5
Accidents resulting in malfunction of the system are effectively avoided.

(Effect of the invention) The water heater of the present invention is equipped with a safety valve for releasing expanded water inside the housing, and a drain pipe connected to the safety valve via a heat-resistant hose and protruding outside the machine. The drain port pipe is formed with a slit part that sucks out water remaining in the heat-resistant hose, so even when the safety valve is momentarily closed and water remains in the heat-resistant hose, the slit part will suck out the water remaining in the heat-resistant hose. The water remaining inside can be effectively sucked out and the remaining water can be effectively discharged to the outside from the drain pipe, and there is no chance of water remaining inside the heat-resistant hose, which prevents the heat-resistant hose from becoming clogged due to freezing even in winter. This has the effect of allowing the safety valve to perform its function well.

[Brief explanation of the drawing]

The figures show one embodiment of the present invention, in which Fig. 1 is a sectional view of the main parts of the water heater, Fig. 2 is a perspective view of the drain pipe, and Fig. 3 is a front view of the drain pipe shown in Fig. 2. be. 1... Water heater, 2... Housing, 5... Safety valve, 6
...Heat-resistant vinyl hose, 7...Drain port pipe,
12...Slit portion, 13...Notch portion.

Claims (1)

[Scope of utility model registration request] In a water heater equipped with a safety valve that releases expanded water inside the housing, and a drain pipe that is connected to the safety valve via a heat-resistant hose and protrudes outside the machine, the drain pipe is provided with water that remains in the heat-resistant hose. A water heater characterized by being formed with a slit portion for sucking out water.