JPH0777359A - Electrical hot water heater - Google Patents

Abstract

PURPOSE:To provide an electrical hot water heater in which a water feeding port and a water discharging port are rotatably constructed and a piping work or the like can be simplified. CONSTITUTION:This electrical hot water heater is comprised of a water supplying port 14 and a water discharging port 17, wherein they are further comprised of a first water supplying port 12 and a first water discharging port 15 of which one end is fixed to a lower part of a tank 1 and the other end is directed downward, and a second water supplying port 13 and a second water discharging port 16 which are bent substantially in an L-shape, one end of which is rotatably connected to the first water supplying port 17 and the first water discharging port 15.

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,
More specifically, the present invention relates to the structure of the water supply port and the water discharge port connected to the tank of the electric water heater.

[0002]

2. Description of the Related Art FIG. 8 is a vertical sectional view of a conventional electric water heater, and FIG. 9 is a top view thereof. In the figure, 1 is a tank of an electric water heater, 2, 3 and 4 are an upper case, a body case, and a lower case provided around the tank 1, and upper case 2 and lower case 4 are screws (not shown), etc. Are fixed to the body case 3 respectively. 5 is a heating element provided in the tank 1 for heating water in the tank 1, 6 is a hot water supply port connected to a hot water supply pipe for supplying hot water boiled in the tank 1, one end of which is located above the tank 1. It is fixed and the other end is projected from the upper case 2 to connect with the hot water supply pipe. Numeral 7 is a substantially L-shaped bent water supply port connected to a water supply pipe for supplying water into the tank 1, and 8 is a substantially L-shaped bent water discharge port connected to a drain pipe for discharging water to the outside of the tank 1. , One end of each of the ports 7 and 8 is fixed to the lower portion of the tank 1, and the other end thereof is connected to a water supply pipe or a drain pipe as shown in FIG. Is projected from.

A heat insulating material 9 is provided on the outer periphery of the tank 1.
Reference numeral 10 is a supporting leg portion that supports the entire apparatus of the tank 1 and the electric water heater, and 11 is a controller portion that is provided in the body case 3 in a portion corresponding to the front side of the electric water heater and that controls the energization of the heating element 5 and the like.

In the electric water heater constructed as described above, first, the hot water supply pipe is connected to the hot water supply port 6 fixed to the upper part of the tank 1 and protruding from the upper case 2, and fixed to the lower part of the tank 1 from the body case 3. Projected water supply port 7 and drainage port 8
Complete the plumbing work by connecting the water supply pipe and drainage pipe respectively. Next, when the tank 1 is filled with water from the water supply port 7 connected to the water supply pipe, the heating element 5 generates heat under the control of the controller unit 11 to boil the water in the tank 1 to a predetermined temperature. At this time, the hot water in the tank 1 is kept at a predetermined temperature by the heat insulating material 9. Next, when the boiling water in the tank 1 is supplied from the hot water supply port 8 connected to the hot water supply pipe, the same amount of water is supplied from the water supply port 7 into the tank 1, and the water in the tank 1 is supplied. Is boiled again to a predetermined temperature so that hot water can always be supplied.

When the water inside the tank 1 is drained by cleaning the inside of the tank 1 or leaking water from the tank 1, the drain pipe connected to the drain port 8 is used to drain the water to the drain, and the tank 1 is cleaned. To do.

Further, as an example of a water heater having a structure similar to that of the conventional electric water heater as described above, as an example, an actual water heater 3-5735.
There are inventions disclosed in Japanese Patent Laid-Open No. 3-25247 and Japanese Patent Laid-Open No. 3-45247.

The water heater disclosed in Japanese Utility Model Laid-Open No. 3-57353 discloses a U-shaped cut portion for holding a pipe, in which a water supply pipe and a drain pipe connected to a water heater can body through a connecting elbow are provided in a support. The U-shaped cut-in portion prevents the water heater can body from being deformed or damaged, and the water-supply pipe and drain pipe are placed in the U-shaped cut portion. As a result, accurate positioning can be performed and the assemblability is improved.

In the water heater disclosed in Japanese Utility Model Laid-Open No. 64-45244, the water supply pipe and the overflow pipe are erected in the tank from the bottom of the tank, and the space for mounting these pipes outside the tank is unnecessary. This makes it easy to downsize the water heater.

Further, in the water heater disclosed in JP-A-3-25247, a water inlet and a water outlet provided at the bottom of a tank-shaped water heater main body are penetrated through a bottom plate and a leak receiver at the bottom of the water heater. , The product height of the product is lowered.

[0010]

In the conventional electric water heater as described above, one end of the water supply port 7 and the drainage port 8 is the tank 1.
It is fixed to the lower part of the, and the other end protrudes from the body case 3 at the front side of the water heater to connect with the water supply pipe and drainage pipe, so when performing piping work such as water supply pipe and drainage pipe, control The water heater was arranged so that the part 11 was on the front side, and the water supply pipe and the drain pipe were guided to the front side of the water heater and connected to the water supply port 7 and the water discharge port 8. However, if there is an obstacle such as a wall or a fence at the installation location of the water heater, the installation location and orientation are restricted, and the water supply pipe and the drainage pipe cannot be connected from the front side.
In order to connect to the water supply port 7 and the drainage port 8 fixed to the pipe, the water supply pipe and the drainage pipe must be extended so that the piping work becomes complicated and the work requires time and labor. Was there.

The invention disclosed in Japanese Utility Model Laid-Open No. 3-57353 and Japanese Utility Model Laid-Open No. 64-45244 and the invention disclosed in Japanese Laid-Open Patent Application No. 3-25247 disclose a small space for installing a water heater. However, the workability of piping work can be improved in that the water supply pipe and the like can be accurately positioned, but the above problems cannot be solved.

By the way, the invention disclosed in Japanese Utility Model Laid-Open No. 4466/1992 has at least one of a hot water supply pipe port, a water supply pipe port, and a drainage pipe port provided in a tank installed inside the outer frame. In addition to providing a flexible joint at the tip of the pipe mouth of, the pipe insertion part is formed on the left side surface and the right side surface of the outer frame so as to correspond to the flexible joint. One or more of hot water supply pipes, water supply pipes, and drainage pipes that extend from the inside of the outer frame to the outside through the insertion part can be connected in either the left or right direction, and can be installed at the location of the water heater. Even if there are restrictions, various types of pipes can be installed with the operation panel on the front still in the proper direction, improving workability without undue piping work. Since insertion portion is fixed, as the case since it is necessary to pipe by extending the water supply pipe or the like to the insertion portion, did not reach until solve the above problems.

The present invention has been made in order to solve the above problems, and an object of the present invention is to provide an electric water heater in which the water supply port and the water discharge port are configured to be rotatable so that piping work and the like can be simplified. It is intended.

[0014]

In the electric water heater according to the present invention, a water supply port and a drainage port are fixed at one end to the lower part of the tank and the other end faces downward. And a second water supply port and a second water discharge port whose one end is rotatably connected to the first water supply port and the first water discharge port and is bent into an L-shape. Further, the second water supply port and the second drainage port are projected from the lower side of the case. Further, the side wall of the case is provided with an elongated hole through which the second water supply port and the second drainage port are projected and which is movable in the horizontal direction.

[0015]

The one end of the first water supply port and the first drainage port are fixed to the lower part of the tank, and the other end is fitted with one end of the second water supply port and the second drainage port. Then, the flanges provided on the second water supply port and the second drainage port are respectively brought into contact with the flanges provided on the first water supply port and the first drainage port and sandwiched in the opening of the coupling fitting, and the second Water inlet and second
Rotatably connects the drainage port to the first water supply port and the first drainage port, and rotates the second water supply port and the like in an arbitrary direction to easily connect the water supply pipe and the like.

Further, by projecting the second water supply port and the second water discharge port from the lower side of the case, the pivoting range of the second water supply port and the second water discharge port can be widened to simplify the piping work. Try to change.

Further, the second water supply port and the second water discharge port are provided on the side wall of the case so as to provide the elongated holes which can be moved in the horizontal direction, thereby facilitating the work of piping work such as a water supply pipe. Prevent the water supply port, etc. from external impact.

[0018]

【Example】

Example 1. 1 is a vertical sectional view of a first embodiment of the present invention,
FIG. 2 is an enlarged view showing a main portion in a cross section. The same parts as those of the conventional example described with reference to FIGS.

In the figure, 12 is a first water inlet having one end fixed to the bottom of the tank 1 and the other end having a flange 12a, and 13 is bent in an approximately L-shape and connected to the first water inlet 12 at one end. The second water supply port having the convex-shaped connecting portion 13a and the flange 13b that connects the first water supply port 12 and the second water supply port 13 constitutes the water supply port 14.
Reference numeral 18 denotes an O-ring arranged in the groove 19 provided on the side surface of the connecting portion 13a of the second water supply port 13, and the first water supply port 12
And water leakage due to the connection between the second water supply port 13 and the second water supply port 13.
Reference numeral 20 denotes a connecting metal fitting having an opening 20a in a part and made of a material having a spring property. As shown in FIG. 3, the flange 12a of the first water supply port 12 and the flange 1 of the second water supply port 1 are provided.
The second water supply port 13 is rotatably connected to the first water supply port 12 by sandwiching 3b in the opening 20a.

Reference numeral 15 is a first drainage port formed in the same shape as the first water supply port 12, and 16 is a second drainage port formed in the same shape as the second water supply port 13. The drain 15 is formed by connecting the port 15 and the second drain 16. In addition,
Similarly to the water supply port 14, at the water discharge port 17, the first drain port 15 and the second water discharge port 15 are provided by the O-ring 18 arranged in the groove 19.
Water leakage due to the connection with the drainage port 16 is prevented, and the second drainage port 16 is rotatably connected to the first drainage port 15 by a connecting fitting 20.

In this embodiment thus constructed, when the water supply port 14 is attached to the tank 1, first, one end of the first water supply port 12 is fixed to the bottom of the tank 1 and the other end of the groove 19 is formed in the groove 19. The connecting portion 13a of the second water supply port 13 provided with the ring 18 is fitted. Then, the flange 13b of the second water supply port 13 is brought into contact with the flange 12a of the first water supply port 12, and the flange 12a is provided in the opening 20a of the coupling fitting 20.
The second water supply port 13 is rotatably connected to the first water supply port 12 by sandwiching between the first water supply port 12 and the flange 13b. At this time, the second
Most of the water supply port 13 of the
As shown in, the bottom of the water heater can be rotated 360 °. Accordingly, when performing the plumbing work for connecting the water supply pipe to the water supply port 14, the second water supply port 13 can be rotated in any direction to connect the water supply pipe, and thus the location where the water heater is arranged. Regardless of the situation, the piping work can be facilitated and the work can be simplified.

Further, the drainage port 17 is attached to the tank 1 in the same manner as the water supply port 14, whereby the second drainage port 16 is rotated in an arbitrary direction to easily connect the drainage pipes. be able to.

In the above embodiment, the second water supply port 13
And a convex-shaped connecting portion 13 at one end of the second drain port 16
Although the case where a and 16a are provided is shown, for example, a connection portion may be provided on the side of the first water supply port 12 and the first drainage port 15, and the flange 12a and the like may be formed by another member. Good. Further, the connecting fitting 20 is not limited to the above embodiment, and the first water supply port 12 and the second water supply port 13,
The first drainage port 15 and the second drainage port 16 can be appropriately changed as long as they can be connected.

Example 2. FIG. 5 is a perspective view showing a second embodiment of the present invention. In this embodiment, the second water supply port 13 and the second drainage port 16 are projected and the elongated hole 21 movable in the horizontal direction is formed. It is provided on the case 3.

With this configuration, the first embodiment
The same action and effect as in the above can be obtained, and as shown in FIG. 5, the second water supply port 13 and the second drainage port 16 are connected to the long hole 2
It can be arbitrarily moved in the horizontal direction within a movement range A having a width substantially the same as the length of 1, so that the work of piping work can be facilitated. Further, it is possible to reduce the exposure of the water supply port 14 and the drainage port 17 and prevent an impact or the like from the outside.

Example 3. FIG. 6 is an enlarged view of the essential parts of the third embodiment of the present invention. In this embodiment, a water supply port 14 and a drain port 17 are provided in the lower portion of the side wall of the tank 1.
The first water supply port 12 and the first drainage port 15 of this embodiment are substantially L-shaped.

With this configuration, the first embodiment
Almost the same operation and effect are obtained, and the water supply port 14 and the drain port 17 provided in the lower portion of the side wall of the tank 1 are also deformed from the first water supply port 12 and the first water discharge port 15 to form the second water supply port. 13 and the second drain port 16 can be rotated in arbitrary directions to easily connect the water supply pipe and the like.

Example 4. FIG. 7 is an enlarged view of the essential parts of the fourth embodiment of the present invention. In this embodiment, a water supply port 14 and a drain port 17 are provided in the lower part of a tank 1 whose lower part is formed in an arc shape. .

With this configuration, the first embodiment
The same action and effect as those of the second water supply port 13 can be obtained.
Also, the second drain port 16 can be rotated in any direction to facilitate the connection of the water supply pipe and the like.

[0030]

As described above, according to the present invention, the water supply port and the water discharge port are substantially the same as the first water supply port and the first water discharge port whose one end is fixed to the lower bottom portion of the tank and the other end faces downward. L
The water supply pipe is connected to the water supply port because the second water supply port and the second water discharge port are bent in a letter shape and one end of which is rotatably connected to the first water supply port and the first water discharge port. When performing plumbing work such as installing, you can rotate the second water supply port or the second water discharge port in any direction to connect the water supply pipe or the drain pipe, and at the place where the water heater is placed, etc. Regardless of this, the piping work can be facilitated and the work can be simplified.

Since the second water supply port and the second water discharge port are projected from the lower side of the case, the second water supply port or the second water discharge port can be arbitrarily rotated with the rotation range of 360 °. The possible range can be widened, and the piping work can be further simplified.

Further, since the second water supply port and the second water discharge port are provided on the side wall of the case and the elongated hole which is movable in the horizontal direction is provided, the water supply port and the water discharge port can be moved in any directions. The piping work can be facilitated and the water supply port and the drainage port can be less exposed to prevent external impact.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a first embodiment of the present invention.

FIG. 2 is an enlarged view showing a cross section of a main part of FIG.

FIG. 3 is a perspective view of a main part of FIG.

FIG. 4 is an operation explanatory view of the first embodiment of the present invention.

FIG. 5 is a perspective view showing a second embodiment of the present invention.

FIG. 6 is an enlarged view of a main part of the third embodiment of the present invention.

FIG. 7 is an enlarged view of a main part of the fourth embodiment of the present invention.

FIG. 8 is a vertical cross-sectional view of a conventional electric water heater.

9 is a top view of FIG. 8. FIG.

[Explanation of symbols]

 1 Tank 12 First Water Supply Port 13 Second Water Supply Port 14 Water Supply Port 15 First Drainage Port 16 Second Drainage Port 17 Drainage Port

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Hisae Akutsu 800 Iwamatsu, Oshima-cho, Nitta-gun, Gunma Sanryo Engineering Co., Ltd. Kamakura Office Gunma Branch

Claims (3)

[Claims] 1. A tank having a heating element inside, a case surrounding the tank, a hot water supply port having one end connected to an upper portion of the tank and the other end protruding from the case to be connected to a hot water supply pipe, and one end An electric water heater having a water supply port and a water discharge port connected to a lower portion of the tank and having the other end protruding from the case and connected to a water supply pipe or a water discharge pipe, wherein the water supply port and the water discharge port are connected at one end to the tank. A first water supply port and a first drainage port which are fixed to the lower part of the and the other end of which faces downward, and one end which can be turned into the first water supply port and the first drainage port by being bent into a substantially L shape. The second connected to
An electric water heater comprising a water supply port and a second drainage port. 2. The electric water heater according to claim 1, wherein the second water supply port and the second drain port are projected from the lower side of the case. 3. The electric hot water according to claim 1, wherein the side wall of the case is provided with an elongated hole through which the second water supply port and the second water discharge port are projected and which is movable in the horizontal direction. vessel.