JP2002054193A - Water supply system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an anti-freezing water supply system capable of being installed simply and not requiring particular maintenance control. SOLUTION: The water supply system has circulation piping between a water supply faucet and a main water supply pipe. Part of the piping is laid in such a manner as to pass through a region capable of being reached by heat generated by a heater installed indoors. A circulation pump for circulating water in the circulation piping is also provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water supply system for supplying water to a kitchen, a sink, a bathroom, and the like, and more particularly to a water supply system for preventing freezing.

[0002]

2. Description of the Related Art Conventionally, in a water supply system for a detached house in a cold region, a drain plug is provided so that water in the pipe can be drained, and a downwardly sloped pipe is formed toward the drain plug, and the pipe is provided for a long time. When water is not used, a draining process is performed.

[0003]

However, there is a problem that the work such as the gradient adjustment is very troublesome, and that the water is drained every time even after the construction, so that the maintenance is difficult.

[0004] Therefore, an object of the present invention is to provide a water supply system for preventing freezing, which is simple in construction work and does not particularly require maintenance.

[0005]

According to the present invention, there is provided a water supply system in which a circulation pipe is formed between a water tap and a water supply main pipe, wherein a part of the circulation pipe is provided with a heating element installed indoors. And a circulation pump for circulating the water in the circulation pipe was provided.

(Operation) In the present invention, a part of a circulation pipe formed between a water tap and a water supply main pipe is passed through a range affected by heat generated by a heating element installed indoors. Along with the piping, a circulation pump for circulating water in the circulation pipeline is provided, so that a part of the circulation pipeline is heated using waste heat of the heating element, and the water temperature in the pipeline of the portion is increased. While circulating in the circulation pipeline, the water temperature in the entire circulation pipeline is increased. Thereby, freezing of the whole circulation pipeline can be prevented.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic explanatory view showing one embodiment of the water supply system of the present invention. In FIG. 1, 1
Reference numeral 0 denotes a main water supply pipe which has one end directly or indirectly connected to an external water supply pipe (not shown) buried outside the building and supplies water to each facility in the building. The other end of the water supply main pipe 10 is connected to the water supply header 30. The water supply header 30 has one large-diameter connection port and a plurality of small-diameter connection ports (two in FIG. 1).
Is formed from a cylindrical pipe having a large diameter. Water is supplied to a large-diameter connection port, and water is supplied to each facility from a plurality of small-diameter connection ports.

[0008] One of the small diameter connection ports of the water supply header 30 is connected to a water tap 501 via a water supply pipe 101. Here, the water tap is installed in a place requiring water supply, such as a kitchen, a sink, a bathroom, a vicinity of a washing machine, and a toilet. And hydrant 5
01 and the water supply pipe 101 are connected by a three-way joint 801. The three-way joint 801 has two connection ports in parallel and one connection port in a direction opposite to the connection port.

The water supply pipe 101 is connected to one of the parallel connection ports of the three-way joint 801. A water tap 501 is connected to the connection port in the opposite direction, whereby water is supplied to the water tap 501. A return pipe 201 is connected to the other of the parallel connection ports. The other end of the water return pipe 201 is connected to the water return header 40.

The water return header 40 is a tubular pipe formed with one large-diameter connection port and a plurality of small-diameter connection ports (two in FIG. 1). The same pipe as the water supply header 30 can be used. . The water return header 40 collects the water returned from each water tap and collects the water from the large-diameter connection port.

Similarly, another water tap 502 is connected to the water supply header 30, the water return header 40 and the three-way joint 80.
2 through a water supply pipe 102 and a water return pipe 202. The outlet of the water return header 40 is connected by a water return main pipe 20 to a circulation pump 70 provided in the middle of the water supply main pipe 10. Circulation pump 70 connects return water main pipe 20 to water supply main pipe 10, and supplies water from an external water supply pipe (not shown) to
The water returned through the water return main pipe 20 is supplied with water taps 501, 5
It is sent in the 02 direction. Water tap 5 with the above piping
A circulation pipe is formed between the water supply main pipes 01 and 502 and the water supply main pipe 10 so that water in the pipe can be circulated.

The water supply main pipe 10, the water supply pipes 101, 10
2. As the water return pipes 201 and 202 and the water return main pipe 10, a resin pipe, for example, a cross-linked polyethylene pipe or a polybutene pipe may be used. Further, the water supply main pipe 10, the water supply pipes 101, 10
2. If the water return pipes 201 and 202 and the water return main pipe 10 are covered with a heat insulating material having a thickness of 3 to 20 mm as required, the freezing environmental temperature can be reduced. However, the piping of the portion affected by the heat generated by the heating element is not covered with the heat insulating material. This is for efficient heat exchange. The capacity of the circulation pump 70 is determined by the total distance of the circulation pipe and the pipe resistance, but the circulation flow rate may be 0.3 to 30 L (liter) / min.

Reference numeral 90 denotes a heating element, and reference numeral 60 denotes a range affected by heat generated by the heating element 90. The heating element 90 is, for example, a heating device such as a stove or a fan heater, a cooking device such as a gas range, or a control device such as a mechanical device. There is no particular limitation on the purpose of generating heat or generating heat as a result of the operation, as long as it generates heat.

Range 6 affected by heat generated by heating element 90
0 is a range in which the temperature is raised by the heating element directly or indirectly, such as around the heating element, in a room where the heating element is installed, or around it. In FIG. 1, hydrant 502
Is passed through the range 60 affected by the heat. The return pipe 202 is bent multiple times within the range 60 affected by heat. By doing so, the length of the pipe existing in the range 60 affected by heat becomes longer, and the amount of water at which the water temperature rises can be increased. However, it is not always necessary to lengthen the tube in the range 60 affected by heat by bending a plurality of times, and an appropriate tube length may be designed according to the environmental temperature.

When a part of the water supply pipe 202 is piped so as to pass through the range 60 affected by the heat, for example, if the heating element 90 is a heating appliance, a part of the room where the heating appliance is installed is provided. Piping above the ceiling, under the floor, and in the wall. If there is no aesthetic problem, an exposed pipe along the inner wall, floor, or ceiling may be used.

The water in the water supply pipe 202 receives heat within the range 60 affected by the heat, and the water temperature rises. On the other hand, hydrant 5
01, 502 and the water in the circulation line formed between the water supply main pipe 10 irrespective of the opening and closing of the water taps 501, 502,
It is circulated by a circulation pump 70. Therefore, the water in the water supply pipe 202 whose temperature has risen is mixed while circulating in the circulation pipeline, and raises the water temperature of the entire circulation pipeline. In this way, the water in the circulation line does not fall below 0 ° C. and freezing is prevented.

The following water supply system was constructed and the state of prevention of freezing of the piping was confirmed. A 20-mm-diameter crosslinked polyethylene pipe covered with a 10-mm-thick heat insulating material was used for the main water supply pipe and the main water return pipe, and the pipe length was 5 m. The water supply pipe and the drain pipe have a diameter of 1 mm covered with a 10 mm thick heat insulating material.
A 3 mm crosslinked polyethylene pipe was used, and the pipe length was 10 m. In addition, a circulation pump having a capacity of 3 L (liter) / min was used.

Two water taps are provided, and a part of a return pipe connected to one of them is connected to a wall of a room in which a heating device is installed. The length of the tube was 5 m. The temperature of the room where the heater was installed was 20 ° C, and the ambient temperature around the water supply pipe was -5 ° C. As a result, when a part of the circulation pipe was laid in the wall of the room where the heating device was installed, freezing did not occur,
When the conventional piping was performed, it was frozen in 3 hours.

[0019]

As described in detail above, according to the present invention, the installation of the water supply system is extremely simple because no special complicated work is required for the construction. Further, even after the installation of the water supply system, no maintenance is required, and the waste heat is used, so that the running cost is reduced.

[Brief description of the drawings]

FIG. 1 is a schematic explanatory view showing one embodiment of a water supply system of the present invention.

[Explanation of symbols]

 Reference Signs List 10 main water supply pipe 20 main water return pipe 30 water supply header 40 drainage header 60 range affected by heat 70 circulation pump 90 heating element 101, 102 water supply pipe 201, 202 return water pipe 501, 502 water tap

Claims (1)

[Claims] In a water supply system in which a circulation pipe is formed between a water tap and a water supply main pipe, a part of the circulation pipe is affected by heat generated by a heating element installed indoors. And a circulation pump for circulating water in the circulation pipeline is provided.