JPH02610Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to a piping structure in an electric water heater used in homes such as apartments.

(Prior Art) The piping structure of a conventional electric water heater will be explained based on FIG. 9. The conventional piping structure includes a primary water supply pipe 11 that supplies tap water to an electric water heater 10;
A pressure reducing valve 12 installed in the secondary water supply pipe 11, and a secondary water supply pipe 14 that branches from the primary water supply pipe 11 on the downstream side of the pressure reduction valve 12 and supplies tap water to the faucet 13 side.
, a hot water pipe 16 that takes out hot water from the electric water heater 10 and supplies it to the faucet 15 side, and the pressure reducing valve 12
a water side relief valve 18 installed in a water relief pipe 17 branched from the primary water supply pipe 11 on the downstream side of the water supply pipe 11; A valve 20 is provided. Note that the primary water supply pipe on the downstream side of the pressure reducing valve 12 is indicated by the reference numeral 11a.

The electric water heater 10 is generally constructed so that water is received through a lower inlet and hot water is sent out through an upper outlet. Therefore, the primary water supply pipe 11a is connected to the lower side of the electric water heater 10, and the hot water supply pipe 16 is connected to the upper side of the electric water heater 10.

In addition, the water release pipe 17 and the hot water release pipe 19
are the water side and hot water side relief valves 18 and 2, respectively.
0 to drains 21 and 22.

In the above conventional piping structure, water is introduced into the primary water supply pipe 11, then passes through the pressure reducing valve 12, and then enters the lower side of the electric water heater 10. A portion of the water that has passed through the pressure reducing valve 12 is sent to the faucet 13 via the secondary water supply pipe 14.
guided to the side. Hot water heated by the electric water heater 10 is guided to a desired number of faucets 15 through a hot water supply pipe 16. Further, after passing through the pressure reducing valve 12, the unnecessary water that has reached an abnormally high pressure is discharged from the drain 21 through the water side relief valve 18. Similarly, unnecessary hot water at abnormally high pressure that has entered the hot water supply pipe 16 is discharged from the drain 22 through the hot water side relief valve 20.

(Problems to be Solved by the Invention) In general, the electric water heater 10 uses the pressure reducing valve 12 and the relief valves 18, 2 in order to maintain the pressure inside the can below a predetermined value (10 m of water column, or 1.0 Kg/cm ² ). It is necessary to use a piping structure with

However, in the conventional piping structure, the pressure reducing valve 12 and the relief valves 18, 20 are individually placed at unspecified positions, meaning that their mounting positions and piping materials vary depending on the contractor. Because of this, there is a problem that piping, maintenance, and replacement work is complicated and time-consuming. In addition, when constructing piping etc., it must be carried out on-site, and for this purpose it is necessary to secure sufficient piping space, but since the electric water heater 10 inherently requires a large occupied space, A problem arises in that the electric water heater 10 and its piping structure become very large.

This invention was devised to solve these conventional problems, and its purpose is to unitize the pressure reducing valve and various relief valves as an integrated valve set, and to make it possible to specify the mounting position. It is an object of the present invention to provide a piping structure that is easy to install, maintain, and replace, and that occupies less space.

(Means for Solving the Problems) The present invention integrates the pressure reducing valve on the primary water supply pipe, the water side and hot water side relief valves, and the pipelines that interconnect these through a joint. The valve set is defined as follows. That is, this valve set includes a pressure reducing valve,
Water side and hot water side relief valves, joints between these and the primary and secondary water supply pipes and the hot water supply pipe, i.e. joints between openings on both sides of the pressure reducing valve and the primary water supply pipe, the primary and Joints between secondary water pipes,
It consists of a joint between the hot water side relief valve and the hot water supply pipe, a joint between the relief pipes of the water side and hot water side relief valves, and a common relief pipe, all integrated, and this valve set is suitable for electric water heaters. placed above the head.

(Function) The pressure reducing valve, the water side relief valve, and the hot water side relief valve are installed above the electric water heater as an integrated valve set through desired pipe lines and joints, so they are not assembled into a unit in advance. In addition, the joints between the primary and secondary water supply pipes and hot water supply pipes in this valve set are also placed above the electric water heater, so the installation position of the valve set can be specified. This makes installation and replacement work of the valve set extremely easy.
Furthermore, the space for piping on the side of the electric water heater is significantly reduced.

(Example) The present invention will be described below based on the example shown in FIGS. 1 to 8. Note that the same reference numerals will be used to describe the same parts as in the prior art.

1 to 5 show an embodiment of the present invention, and this piping structure is provided with a primary water supply pipe 11, a secondary water supply pipe 14, and a hot water supply pipe 16 as in the conventional case.

According to the present invention, an integral unitary valve set 30 (FIG. 1) is located overhead of the electric water heater 10. This valve set 30 includes a common relief pipe 31 for water and hot water.
are connected, and the common relief pipe 31 is connected to the drain 32.

To explain the detailed structure of the valve set 30, as shown in Figs.
3 and the joint 2.
4, and in order to branch the secondary water supply pipe 14 from the primary water supply pipe 11 on the downstream side of the pressure reducing valve 12, the primary water supply pipe 1
The branch pipe 33 connected to the branch pipe 3
3 and the hot water supply pipe 16, one relief pipe 34 is connected on both sides to the branch pipe 33 and the hot water supply pipe 16, and a branch pipe (joint) connecting the relief pipe 34 and the hot water supply pipe 16 ) 35, a water side relief valve 18 interposed in the relief pipe 34 closer to the primary water supply pipe 11 side, and a hot water side relief valve 20 interposed in the relief pipe 34 closer to the hot water supply pipe 16 side.
and a joint 36 between the relief pipe 34 and the common relief pipe 31.

The valve set 30, namely the pressure reducing valve 12, branch pipe (joint) 33, one relief pipe 34, branch pipe (joint) 35, water side relief valve 18, hot water side relief valve 20,
and the joint 36 are all compactly arranged above the head of the electric water heater 10. Said 1
The main relief pipe 34 is connected to the common relief pipe 31 via a joint 36.

Further, in this embodiment, the water side and hot water side relief valves 18 and 20 are arranged in a horizontal direction. To explain the operation of these valves,
Water with abnormally high pressure in the primary water supply pipe 11a passes from the branch pipe 33 to the water side relief valve 18, and similarly, hot water with abnormally high pressure in the hot water supply pipe 16 passes through the hot water side relief valve 2.
0, enter the respective relief pipes 34, and from there enter the common relief pipe 31 and be discharged from the drain 32.

As is clear from the configuration of the above embodiment, in the present invention, the pressure reducing valve 12, the branch pipes (joints) 33, 35, the water side relief valve 18, the hot water side relief valve 20, and the joint 36 are integrated into the valve set 30. , electric water heater 10
Because they are placed overhead, they can be assembled into a unit in advance, making it possible to install or replace them all at once, compared to installing or replacing them separately on site. The number of connections of pipes and pipe fittings can be significantly reduced. Further, since the valve set 30 is located above the electric water heater 10 as described above, the piping space on the side of the electric water heater 10 is significantly reduced. In addition, in the present invention, the discharge pipes for hot water and water are combined into one relief pipe 34, and the relief pipe 34
4 is connected to the common relief pipe 31 via the joint 36, resulting in a more compact and easy-to-handle piping structure. Note that the primary water supply pipes 11, 11a, etc. may be formed into twin tubes.

6 to 8 show other embodiments of the present invention, in which the water side relief valve 18 and the hot water side relief valve 20 in the valve set 30 are arranged so as to be vertically positioned relative to each other. There is. The rest of the structure is the same as that of the previous embodiment. This embodiment also provides the same effects as the previous embodiment.

(Effect of the invention) As explained above, according to the invention, the pressure reducing valve in the primary water supply pipe, the branch pipe (joint) of the primary and secondary water supply pipes, the water side and hot water side relief valves, All the pipes and joints that connect these are integrated into a valve set, and this valve set is placed above the head of the electric water heater, so each valve can be assembled in advance and made into a unit for mass production. . In addition, the valve set unitized in this way can be configured so that each pipe can be connected by operating each of the joints 33, 35, and 36.
1, 14, and 16, which requires less work than when each valve or joint is attached and detached separately. Therefore, when adjusting each valve, it is possible to remove each valve set (each unit) and work in a desired large inspection area, and when replacing inconvenient valves, there is no need to separate them individually. It becomes possible to replace each valve set (unit), simplifying the work procedure.

Furthermore, the installation positions of valve sets have been specified, and construction work can be done to match the dimensions and piping positions of the piping and pipe fittings, as in the case of installing them individually in unspecified positions as in the past, or replacing them individually. There's no need. Additionally, the piping space on the side of the electric water heater is significantly reduced. Therefore, construction can be performed even in a very narrow space. Furthermore, since the mounting positions and mounting heights of various valves are specified, pressure management and maintenance become easier.

[Brief explanation of the drawing]

Fig. 1 is a circuit diagram of a piping structure of the present invention, Fig. 2 is a front view of a piping structure according to an embodiment of the invention, Fig. 3 is a plan view of Fig. 2, and Fig. 4 is a diagram of Fig. 2. Fig. 5 is a cross-sectional view of the main part of the piping structure of Fig. 4;
Fig. 6 is a plan view of another embodiment of the present invention, Fig. 7 is a front view of Fig. 6, Fig. 8 is a right side view of Fig. 7, and Fig. 9 is a circuit diagram of a conventional piping structure. be. 10... Electric water heater, 11, 11a... Primary water supply pipe, 12... Pressure reducing valve, 13... Faucet, 14...
Secondary water supply pipe, 15...Faucet, 16...Hot water pipe, 1
8...Water side relief valve, 20...Hot water side relief valve, 24...
…Joint, 30…Valve set, 31…Common relief pipe, 32…Drain, 33…Branch pipe (joint),
34...Single relief pipe, 35...Branch pipe (joint),
36...Joint.

Claims (1)

[Scope of utility model registration request] A primary water supply pipe that supplies tap water to an electric water heater;
A pressure reducing valve installed in the primary water supply pipe, a secondary water supply pipe branching from the primary water supply pipe downstream of the pressure reducing valve and supplying tap water to the faucet side, and the electric water heater. a water supply pipe that takes hot water out of the water and supplies it to the faucet side; a water side relief valve installed in a water relief pipe branched from the primary water supply pipe downstream of the pressure reducing valve; and a water side relief valve that branches from the water supply pipe. A piping structure in an electric water heater comprising a hot water side relief valve interposed in a hot water relief pipe, the pressure reducing valve, the water side relief valve, the hot water side relief valve, and openings on both sides of the pressure reducing valve. and a joint between the primary water supply pipe, a joint between the primary and secondary water supply pipes, a relief pipe connected to the water side and hot water side relief valves, and a joint between the relief pipe and the hot water supply pipe. , an electric water heater characterized in that a joint between the relief pipe and the common relief pipe is integrated to form a valve set, and this valve set, which can be removed by each of the joints, is arranged above the head of the electric water heater. Piping structure in the vessel.