JP3270786B2 - Piping freeze prevention device for hot and cold water supply - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for preventing freezing of piping for hot and cold water supply .

[0002]

2. Description of the Related Art Generally, when a water supply / hot water supply system is installed in a building in a cold region, in order to prevent the piping from freezing in the winter season, the piping is turned around the ceiling to enable drainage of water from the piping. Piping is employed.

FIG. 2 shows an example of such a water supply / hot water supply apparatus. In the figure, in the ceiling 1,
A water supply header 2 and a hot water supply header 3 are arranged.

A water supply pipe 4 is provided on the inlet side of the water supply header 2.
The water supply source 5 is connected via the. Water supply header 2
Are provided with four supply ports 2A, 2B, 2 for supplying water.
C and 2D are arranged.

A hot water supply pipe 6 is provided on the inlet side of the hot water supply header 3.
The hot water supply source 7 is connected via the. Hot water supply header 3
On the outlet side, four supply ports 3A, 3B, 3 for supplying hot water are provided.
C and 3D are arranged.

[0006] Each supply port 2 of the water supply header 2
A, 2B, 2C, 2D, water supply pipes 8, 9, 10, 1
One end 8A, 9A, 10A, and 11A of each 1 are connected. The water supply pipe 8 bends vertically on the way and extends below the ceiling 1.

A first elbow 12 is connected to the other end 8 B of the water supply pipe 8.
A hydrant 13 composed of a hydrant valve is connected to the first elbow 12 through a hydrant box 14.
The attachment portion of the water tap 13 is fixed to the water tap box 14.

[0010] A first header cover 15 for covering the water supply header 2 is provided. Water supply piping 8
A water supply sheath pipe 16 is provided on the outer periphery of the water supply pipe 8 through a space.
The water supply sheath tube 16 extends from the first header cover 15 to the water supply faucet box 14. The inside of the water supply sheath tube 16 and the water faucet box 14 communicate with each other. The water supply sheath pipe 16 is provided with the water supply pipe 8 deteriorated by use.
It is provided for use as a cover when pulling out and replacing. The water supply sheath tube 16 and the water supply faucet box 14 are airtight.

Since the structure of the water supply pipes 8, 9, 10, 11 is the same, the water supply sheath pipe 16 relating to the water supply pipe 8 is provided.
And the water supply faucet box 14 has been described, but also around the other water supply pipes 9, 10, and 11, respectively.
B, 10B, and 11B are exteriorly provided, and a water tap box (not shown) is provided at the tip of the water supply pipes 9, 10, and 11, respectively, and their structures are the same.

On the other hand, each supply port 3A of the header 3 for hot water supply,
3B, 3C, 3D, hot water supply pipes 17, 18, 19, 2
0 is connected to one end 17A, 18A, 19A, 20A. The hot water supply pipe 17 bends vertically on the way and extends below the ceiling 1.

A hot-water tap 22 comprising a water-supply valve is connected to the other end 17B of the hot-water supply pipe 17 via a second elbow 21. The second elbow 21 is accommodated in a hot-water tap box 23, and the hot-water tap box 23 The mounting portion of the hot water faucet 22 is fixed to.

A second header cover 24 for covering the hot water supply header 3 is provided. Hot water supply piping 1
A hot water supply sheath tube 25 is extrapolated along the hot water supply pipe 17 through the space around the outer periphery of 7, and the hot water supply sheath tube 25 extends from the second header cover 24 to the hot water tap box 23. The hot water supply sheath tube 25 and the inside of the hot water tap box 23 communicate with each other. The hot water supply sheath tube 25 is provided to be used as a cover when the hot water supply pipe 17 deteriorated by use is pulled out and replaced. The hot water supply sheath tube 25 and the hot water supply tap box 23 are airtight.

The hot water supply pipes 17, 18, 19, 20
Are the same, so the description has been given of the hot water supply sheath tube 25 and the hot water supply box box 23 related to the hot water supply pipe 17, but also around the other hot water supply pipes 18, 19, 20 around the water supply sheath tubes 18B, 19B, each water tap box to the tip of the hot water supply pipe 18, 19 and 20 together 20B are exterior
Boxes ( not shown), and the same applies to their structures.

Then, water is supplied from the water supply source 5 to the water supply header 2, and this water is distributed from the water supply header 2 to each of the water supply pipes 8, 9, 10, 11, and passes through, for example, the water supply pipe 8. To the water tap 13.

Hot water is supplied from the hot water supply source 7 to the hot water supply header 3, and the hot water is distributed from the hot water supply header 3 to each of the hot water supply pipes 17, 18, 19, and 20, and passes through, for example, the hot water supply pipe 17. To the hot water faucet 22.

In the winter, when the above-mentioned water supply / hot water supply device is used and then stopped at night or for a long time, the water inside the water supply pipe 8 and the hot water supply pipe 17 are stopped.
By draining the hot water, the inside of the water supply pipe 8 and the inside of the hot water supply pipe 17 are emptied to prevent the pipe from freezing.

[0017]

However, in the conventional water supply / hot water supply device, after using the above water supply / hot water supply device,
For example, when the use is stopped at night or when the use is stopped for a long time and the temperature decreases, the water inside the water supply pipe 8 is
If you forget to drain the hot water inside the hot water supply pipe 17,
The water supply pipe 8 and the hot water supply pipe 17 are frozen. Due to this freezing, the water supply pipe 8, the hot water supply pipe 17,
The elbow 21 or the like may be damaged, or the inside of the water supply pipe 8,
When ice is formed in the hot water supply pipe 17 and it is used after stopping, there is a problem that water or hot water cannot be supplied to the water supply pipe 8 and the hot water supply pipe 17.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide an apparatus for preventing freezing of a water supply hot water supply pipe which can prevent freezing of the water supply pipe and the hot water supply pipe. .

[0019]

According to the first aspect of the present invention,
A water supply header having a supply port for supplying water, a hot water supply header having a supply port for supplying hot water, a water supply pipe having one end connected to the supply port of the water supply header, and a second end of the water supply pipe. A provided water tap box, a hot water supply pipe having one end connected to a supply port of the hot water supply header, a hot water supply box provided at the other end of the hot water supply pipe, and a second water supply box disposed over the water supply header. 1 header cover, a second header cover disposed over the hot water supply header, and extrapolated through a space around the outer periphery of the water supply pipe to reach the water supply faucet box from the first header cover and to the inside of the water faucet box. A water supply having a water supply sheath tube communicating therewith and a water supply sheath tube extrapolated through a space around the outer periphery of the hot water supply pipe and extending from the second header cover to the hot water supply box box and communicating with the inside of the hot water supply box box. In the hot water supply device, a connecting pipe for communicating between the inside of the water tap box and the inside of the hot water tap box, a pipe for communicating between the inside of the first header cover and the inside of the second header cover, and the inside of the hot water supply sheath pipe and the hot water supply sheath pipe, Means for supplying hot air , hot air to the first header cover, water supply
Sheath pipe, water tap box, connecting pipe, hot water box, supply
Hot water sheath tube, second header cover, pipe, first header
And a hot air circulation circuit for circulating in the order of the covers .

[0020] The invention according to claim 2 provides the supply according to claim 1.
The hot-water air is generated by a heater in the water / hot-water supply pipe freeze prevention device.

[0021]

In the present invention, for example, warm air is blown by the hot air blowing means to the first header cover → water supply sheath pipe → water tap box → connecting pipe → hot water tap box → hot water supply sheath pipe → second header cover → Circulate in the order of pipe → first header cover.

The inside of the water supply sheath tube and the hot water supply sheath tube is heated by the warm air from the hot air blowing means, and freezing of the water supply pipe and the hot water supply pipe is prevented.

[0023]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.
A description will be given by taking an overhead pipe that turns a pipe to a ceiling as an example.

FIG. 1 shows an apparatus for preventing freezing of a pipe according to an embodiment of the present invention. In this embodiment, only the parts different from the conventional one will be described. The same components as those of the related art are denoted by the same reference numerals.

In the drawing, reference numeral 31 denotes a hydrant box 1
4 and a connecting pipe connected to the hot-water tap box 23. The connecting pipe 31 is connected to the inside of the hot-water tap box 14 and the hot-water tap box 23.
Let the inside communicate.

A pipe 32 is connected to the first header cover 15 and the second header cover 24, and the pipe 32 connects the inside of the first header cover 15 and the inside of the second header cover 24.

A hot air blowing means 33 composed of a fan is interposed in the middle of the pipe 32, and a heater 34 is mounted on a portion of the pipe 32 between the hot air blowing means 33 and the second header cover 24. Have been.

A temperature sensor 35 is mounted in the first header cover 15, and the temperature sensor 35 is connected to a hot air blowing means 33 via a control device 36 having a timer. The output side of the control device 36 is connected to the opening / closing portion 34A of the heater 34.

Further, although not shown, a water tap box provided at the tip of each of the water supply pipes 9, 10, and 11, and a water tap box provided at the tip of each of the water supply pipes 18, 19, and 20 include : The connecting pipes are connected by connecting pipes, and the connecting structure is the same as the connecting pipe 31 that connects the water supply pipe 8 and the hot water supply pipe 17 to each other. That is,
The water supply sheath pipes 9B, 10B, 11B and the hot water supply sheath pipe 18B,
19B and 20B are connected via each connection pipe.

In this embodiment, when the temperature sensor 35 detects, for example, (0 ° C. to 2 ° C.), the signal is sent to the control device 36, and the hot air blowing means 33 is driven for a predetermined time. You. At the same time, the air in the pipe 32 is heated by the heater 34 by a command from the control device 36 to become hot air. By the above-mentioned hot air blowing means 33, the hot air is supplied to the first header cover 15 → the water supply sheath 16 → the water tap box 14.
→ Connecting pipe 31 → Hot water tap box 23 → Hot water supply sheath 25 →
It circulates in the order of the second header cover 24 → the pipe 32. When the hot air is circulated, the water supply sheath tube 16, the water tap box 14, the hot water sheath tube 25, and the water tap box 23 are also provided.
Is airtight, so that hot air is prevented from leaking to the outside.

The inside of the water supply sheath tube 16 and the hot water supply sheath tube 25 is heated by the hot air, and the water supply pipe 8 and the hot water supply pipe 1 are heated.
7 is prevented from freezing. By appropriately controlling the capacity of the heater 34 and the amount of air blown by the hot air blower 33,
It can be used even in severe cold regions (-20 ° C to -30 ° C).

According to the above configuration, the water supply pipe 8,
Water supply sheath pipe 16 used when hot water supply pipe 17 is replaced
By using the hot water supply sheath tube 25 and the first header cover 15, the water supply sheath tube 16, the connecting tube 31, the hot water supply sheath tube 25, the second header cover 24, and the pipe 32 as one constituent element. A wind circulation circuit can be easily formed.

Therefore, when the water supply / hot water supply device is used and the use of the water supply / hot water supply device is stopped at night or is stopped for a long period of time, the water inside the water supply pipe 8 and the hot water supply pipe 17 are not used.
Even if the user forgets to remove the hot water from the inside, the inside of the water supply sheath tube 16 and the hot water supply sheath tube 25 is heated by the warm air from the hot air blowing means 33, and the inside of the water supply pipe 8 and the hot water supply pipe 17 is Freezing of water can be prevented.

Further, it is not necessary to drain the water from the water supply pipe 8 and the hot water supply pipe 17, which has been conventionally performed. In the present embodiment, an overhead pipe that turns a pipe to a ceiling is described as an example.
Since drainage work can be omitted from the hot water supply pipe, the present invention can also be applied to a hot water supply apparatus in which the pipe is placed below the floor.

Further, in this embodiment, the hot air flows from the water supply pipe 8 to the hot water supply pipe 17. The wind may flow from the hot water supply pipe 17 to the water supply pipe 8.

Furthermore, in the present embodiment, the number of supply ports of the water supply header 2 and the hot water supply header 3 is four, respectively, but the number is not limited to this. In the present embodiment, the warm air blowing means 33 and the heater 34 are mounted in the middle of the pipe 32, but they may be mounted in the middle of the connecting pipe 31.

[0037]

As described above, according to the present invention,
One hot air circulation circuit comprising the water supply sheath tube and the hot water supply sheath tube by using the water supply sheath tube and the hot water supply sheath tube used for replacement of the water supply tube and the hot water supply tube. Can be easily formed.

Therefore, the warm air from the warm air blowing means provides
The inside of the water supply sheath tube and the hot water supply sheath tube is heated, and the effect of preventing freezing of water in the water supply tube and the hot water supply tube is exhibited.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a water / hot water supply pipe freeze prevention device according to an embodiment of the present invention.

FIG. 2 is a configuration diagram of a conventional water / hot water supply pipe freeze prevention device.

[Explanation of symbols]

 2 Header for Water Supply 3 Header for Hot Water Supply 8 Pipe for Water Supply 14 Water Supply Box 15 First Header Cover 16 Sheath Tube for Water Supply 17 Header for Hot Water Supply 23 Hot Water Bottle Box 24 Second Header Cover 25 Sheath Tube for Hot Water Supply 31 Connecting Pipe 32 Pipe 33 Hot air blowing means 34 heater

Claims (2)

(57) [Claims] A water supply header having a supply port for supplying water; a water supply header having a supply port for supplying hot water; a water supply pipe having one end connected to the supply port of the water supply header; A water tap box provided at the other end of the pipe, a hot water pipe connected at one end to a supply port of the hot water header, a water tap box provided at the other end of the hot water pipe, and a water feed header. A first header cover arranged in a horizontal direction, a second header cover arranged to cover the hot water supply header, and extrapolated through a space around the outer periphery of the water supply pipe to reach the water faucet box from the first header cover. A water supply sheath tube communicating with the inside of the water tap box, and a hot water supply that is extrapolated through a space around the outer periphery of the hot water supply pipe and extends from the second header cover to the water tap box and communicates with the inside of the water tap box. A water supply / hot water supply device having a sheath tube, a connection pipe for communicating between the inside of the water tap box and the inside of the water tap box, a pipe for communicating between the inside of the first header cover and the inside of the second header cover, Hot air blowing means for supplying hot air into the sheath pipe for hot water and the sheath pipe for hot water supply, and the hot air to the first header cover, the sheath pipe for water supply, and the water tap.
Box, connecting pipe, hot water tap box, sheath pipe for hot water supply, second head
Circulation in order of lid cover, pipe and first header cover
Feed, characterized in that and a hot air circulation circuit to
Pipe freezing prevention device for hot water supply . 2. A hot air air, water hot water pipe freezing prevention device according to claim 1, characterized in that it is produced by the heater.