JP2003342981A - Piping method for building, suitable for cold temperature area, and piping unit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a piping method which carries out freeze proofing and thawing even if a water service pipe in a building such as a house is formed of a resin, e.g. crosslinked polyethylene which is excellent in heat resistance and weatherability, in order to cope with freezing in a cold temperature area and in the winter season. <P>SOLUTION: According to the method, a pipe member arranged in a water supply system and a hot water-supply system includes a cladding case 12 made of a soft material, and the resin water service pipe 11, heating current-carrying wires 13 and a high-strength wire 14 which are arranged in the cladding case 12, to thereby construct a piping structure. Herein, the heating current-carrying wire is formed into a heating circuit extended from a power source via a control mechanism which controls itself depending on resistance fluctuation of the current-carrying wire. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

The present invention relates to a cross-linked polyethylene (XPE) for distributing tap water from a water main to a water supply terminal such as a kitchen, a washroom, a toilet, and a bath of a building such as a detached house or an apartment house. It relates to piping using resin pipes such as polybutene (PB). It relates to the piping construction method for water pipes that prevents and thaws water pipes in cold regions and low temperatures in winter, and the piping structure used for this. .

[0002]

Conventionally, water pipes in buildings such as residences have been made of metal pipes such as iron pipes, stainless pipes, and copper pipes resistant to heat. For this, there has been a risk of causing a fire accident by directly heating the frozen portion with a burner or the like, or by applying a voltage to both ends of the metal pipe and using the pipe as a heater instead. Also, for freeze prevention, the pipe is covered with a heat insulating material, a water gradient is provided on the pipe to drain water with a drain plug, and an electric heater is partially arranged,
Freezing prevention has been performed by the energization control.

However, metal pipes make it difficult to freely design water pipes in buildings such as residences, and since they have high thermal conductivity, toilets that are not always frequently used in cold regions and winter, There is a problem that the water supply terminal pipes such as buses are easily frozen, and once frozen, it is difficult to thaw.

Furthermore, metal pipes are corrosive and unsanitary depending on the material, and are not suitable for water supply terminal pipes in kitchens, washrooms, etc., and if frozen, if heated for thawing, a fire will occur. It may cause the cause such as. Further, the exposed portion can be thawed relatively easily by heating, but it is very difficult to thaw the concealed portion which occupies most of the house or the like.

On the other hand, a synthetic resin pipe which is flexible and can be freely designed, is not corrosive and is hygienic, is vulnerable to heat and causes brittle fracture at low temperatures. When frozen at low temperature, there is a problem that problems such as cracks occur.

[0006]

SUMMARY OF THE INVENTION The present invention is intended to solve the above-mentioned problems, and is a high-temperature and low-temperature resistant resin such as crosslinked polyethylene (XPE) and polybutene (PB) which has excellent heat resistance and weather resistance. By a pipe member constructed by accommodating a resin water pipe according to the above and a heat-carrying wire parallel to it and a high-strength wire parallel to it It is designed to supply water to the building.

That is, by controlling the energization by constructing a heating circuit through a control mechanism for self-controlling the heating current-carrying wires arranged in parallel with the resin water pipe from the power source in response to the resistance fluctuation of the current-carrying power line, Is set to a freezing prevention area that maintains a temperature that does not freeze and a thawing area that maintains a temperature that can be thawed, so that both the antifreezing function and the thawing function can be performed on the heat conduction wire. Since the polyethylene pipe has a large coefficient of thermal expansion, the high-strength wire also has a role of preventing the extension of the heating wire due to expansion and contraction of the pipe.

Further, by providing a high-strength line in parallel with the heating current-carrying wire, it is possible to prevent a heat storage phenomenon from occurring in the current-carrying wire formed in the heating circuit, and to interpose a leakage breaker on the high-power cable. It is connected to the ground to prevent local heating etc. due to deterioration of the heating wire so that the heat-sensitive resin tube is protected in a temperature environment below the softening temperature.

[0009] The resin water pipe thus constructed, the heat-carrying current wire, and the high-strength wire are housed in a covering case made of a flexible material to form a piping member, and water supplied from the water supply pipe is distributed to user terminals. The system piping and the hot water supply system piping for distributing water from the heat source device to the use terminal are configured to be connected.

Further, the energizing wire from the power source is branched in the self-control mechanism so as to form two alternating energizing circuits so that an excessive current flows to the outer periphery of the resin water pipe so that the resin pipe is not electrically loaded. In addition to saving electricity, it also contributes to saving electricity.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. 1 is a piping member, a covered case made of a flexible material
A resin water pipe 11 made of a cross-linked polyethylene pipe, etc. in 12, a heat generating conducting wire 13, 13 made of nickel wire, etc., which is entirely configured as a circuit by joining and joining other piping members on its outer periphery, a high strength line made of copper alloy 14 are arranged side by side and stored in a free state.

[0012] The heat-generating conducting wire 1 housed in the covering case 12
3, 13, high-strength wire 14 is coated with cross-linked polyethylene,
It is arranged so as to project from the covering case 12 and be installed alongside it, so that the connecting and connecting portion of each wire can be easily worked from the case 12.

The covering case 12 has a pipe 21 made of a flexible material, the outer periphery of which is covered with a foamed heat insulating material 22 made of polyethylene, polypropylene, or the like, and the outer periphery of the pipe 21 is embossed with fine grid grooves or the like. It is configured by being covered with a synthetic resin film 23 such as a polyethylene sheet which has been subjected to.

The piping member 1 is sequentially joined by the joining and connecting mechanism with the other piping members as described above, and is piped in the building as a whole as follows. First, the water supply main A is branched at a branch point D and is piped to a hot water supply header H via a hot water supply device B that receives and heats the supplied water.
The hot water supply path a for distributing water to the hot water supply terminals such as kitchen, toilet, toilet, and bath is directly connected to the water supply header E, and water is distributed to the water supply terminals for kitchen, toilet, toilet, bath, etc. by the water supply header E. To the water supply path b.

The heating current supply line 13 provided along the water supply system pipe for distributing the water supply supplied from the water supply pipe to the utilization terminal and the hot water supply system pipe for distributing the water supply from the heat source device to the utilization terminal are looped at appropriate points to perform self-control. Each heating circuit controlled by the mechanism 3 is configured.

In each of the header cases of the hot water supply header H and the water supply header E, the heat generation conducting wire 13 is taken out from the piping member 1 and wired inside the building structure part, and its end is connected to the power outlet G with an earth leakage breaker. Terminals 2 and 2 are connected to the connectors 31 and 31 of the self-control mechanism 3 set in a required part in the building.

The heat-generating energizing wire 13 is divided into two energizing circuits 13a (water supply) and 13b (hot water supply) by branching the energization wire from the power outlet G in the self-control mechanism 3, and the circuit wiring is provided inside the piping member 1. Since it is provided along with the heat generation energizing circuit wiring, the heat generation energizing wire 13 in the piping member 1 is normally wired as two wires.

With such a configuration, the current from the power outlet G is supplied to the self-control mechanism 3, and an excessive current flows to the outer circumference of the hot and cold hot water supply / exhaust resin pipe to electrically connect the resin pipe. The load will not be applied, and it will also contribute to saving electricity.

During a period in which there is a risk that the water pipe will freeze in cold regions or winter, the main switch of the self-control mechanism 3 is turned on to operate, and the heating wire 13 is controlled so that the temperature of the resin water pipe 11 is controlled. Prevents freezing down.

When the freezing prevention function is selected and the main switch is turned on, the self-control mechanism 3 causes a predetermined current to flow through the heat-generating current-carrying wire 13 to calculate the resistance value at regular time intervals, thereby changing the temperature of the current-carrying wire 13. The temperature of the current-carrying wire 13 is calculated and detected based on the resistance variation rate.

When the detected temperature reaches a temperature at which it does not freeze
The power supply to 13 is stopped, the inside of the piping member 1 is prevented from becoming overheated, and when the detected temperature drops to about 0 ° C, the power supply is restarted and the temperature of the resin pipe 11 drops to the freezing temperature. On / off control is continuously performed so as to be prevented.

When the thawing function is selected and the main switch is turned on, a timer for about 3 hours operates and a predetermined current flows through the heating current conducting line 13. If it does not thaw for about 3 hours, the switch will be turned on again, but if thawed before the time, water will flow, so resistance will be detected by the self-control mechanism 3, and the power supply line 13 will be automatically energized. Is stopped.

A high-strength wire set in parallel with the heating energizing wires 13, 13.
At the stage where the heat-generating current-carrying wire 13 is taken out from the piping member 1 and wired, the heat-carrying current-carrying wire 14 branches off from the current-carrying wire 13 and is grounded via a leakage breaker F.

Since the present invention is configured as described above, a flexible resin that enables flexible piping design of building pipes for complex water pipes as water supply systems such as kitchens, washrooms, toilets, and baths in cold climate houses After using a pipe, we were able to fully cope with low temperatures such as freeze prevention and thawing.

[0025]

[Brief description of drawings]

FIG. 1 is an overall side view showing an example of a building system pipe according to an embodiment of the present invention with a main portion shown in cross section.

FIG. 2 is likewise an enlarged cross-sectional view of a piping member according to an embodiment of the present invention.

FIG. 3 is an enlarged cross-sectional perspective view showing a cross-section of a high-strength wire and a heat-carrying current-carrying wire installed along the same line according to an embodiment of the present invention.

FIG. 4 is a schematic diagram of a self-control mechanism for a heating current-carrying wire and an ultra-high-strength wire installed along a resin water pipe of a piping member according to an embodiment of the present invention.

[Explanation of symbols]

1 Piping member 11 Resin water pipe 12 covered case 13 Heating wire 13a, 13b energizing circuit 14 High strength line 2 terminals 21 Flexible material pipe 22 Foam insulation 23 Synthetic resin coating 24 coating 25 Cross-linked polyethylene resin, etc. 3 Self-control mechanism 31 connector A water supply main B water heater D branch point H hot water supply header E hot water supply header F earth leakage breaker G Power outlet with earth leakage breaker a Hot water supply route b Water supply route

Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) F24H 1/10 303 F24D 17/00 U Z (72) Inventor Naoki Kanemaru 2-14-16 Takaban, Meguro-ku, Tokyo Pay Maezawa (72) Inventor Takeshi Sato 4-18, Numa, Yao-shi, Osaka Prefecture ECO Techno Co., Ltd. (72) Hideo Sunohara 2-4-5 Takaido East, Suginami-ku, Tokyo Misawa Homes In-house F-term (reference) 2D060 AA01 AC03 AC10 BC17 3H025 AA13 AB01 3L073 AA11 AB03 AC07 AD00 AE10

Claims (4)

[Claims] 1. A building piping structure comprising a water supply system pipe for distributing water supplied from a water supply pipe to a utilization terminal by a water supply header, and a hot water supply system pipe for distributing water to the utilization terminal from a heat source machine via a hot water supply header. In the above, the pipe members for the water supply system and the hot water supply system are installed in a covered case made of a flexible material, a resin water pipe and a heat-generating conductor line installed in parallel with the pipe It has a piping structure that accommodates the power lines, and the heating circuit is configured as a heating circuit through a control mechanism that controls itself from the power source in response to resistance fluctuations of the power line. Building plumbing method 2. A cold-weather building piping construction method according to claim 1, wherein the current-carrying wire from the power source is branched in the self-control mechanism into two current-carrying circuits. 3. A resin water pipe and a high-power line installed in parallel with the heat-conductive line and a high-strength line also installed in parallel with the heat-conductive line, which is also equipped with leakage and short-circuit detection. System piping for the water supply system piping that distributes the water supply supplied from the water supply pipe to the usage terminal by the water supply header and the hot water supply system piping that distributes water from the heat source machine via the hot water supply header to the usage terminal However, the building piping unit for cold climates is configured to control the energization of the heat-generating energizing wire by a control mechanism that self-controls in response to resistance fluctuations of the wire. 4. A low temperature-compatible building piping structure according to claim 3, wherein the control mechanism for self-controlling in response to resistance fluctuations of the current-carrying line is configured to be switchable between freeze prevention operation and thaw operation.