JPS5826A - Piping device for hot water heater - Google Patents

Abstract

PURPOSE:To improve a facilitation of work as well as a bending easiness and anti-shock characteristic of optical fiber by a method wherein two hot water pipes and the optical fiber are covered by a similar or different kind of heat insulating materials. CONSTITUTION:Signal transmitting optical fiber 6, hot water feeding pipe 31 and hot water return pipe 32 are covered by the same heat insulater material 5 so as to form the pipe member 34''. The optical fiber 6 is positioned near to the hot water return pipe 32 from the center of the pipe member 34''.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a hot water piping member used in a hot water heating system and the like. The purpose of this invention is to improve the bending resistance and impact resistance of optical fibers for transmission, subject to similar constraints, and to improve the ease of installation work.

Figure 3 shows an example of the configuration of a hot water heating system, where 1 is the heat source, 2mu~2
N is the radiator, 3mm~3N is the heat source 1 and each radiator 2mm~2N
Hot water piping to ensure hot water passage with 41~4N is heat source 1
This is an electric wire that electrically connects the controller 1φ of the controller 1φ and the condolorams φ to Nφ of each of the radiators 2M to 2N.

Although hot water pipes 3mm to 3N and power supplies 4mm to 4N may be installed separately, as shown in Figure 4, hot water pipes 3mm to 3N may be installed separately.
A piping member 34 may be used in which the wires 4 and 4 are covered with the same heat insulating material.

There are two drawbacks to such a member. First, since electrical signals are transmitted through electric wires, the signal transmission quality is strongly dependent on external noise. Second, at least two wires are required,
The installation work also requires the connection of at least two electric wires.

These drawbacks can be solved by using optical fibers for the signal transmission path. That is, firstly, it receives almost no external noise, and secondly, since the signal is an optical signal, there is no need to provide a current feedback circuit, so only one line is required. however,
Optical fiber itself has the following disadvantages compared to electric wire. Firstly, the minimum allowable bending radius is relatively large, secondly, the impact resistance is relatively small, and thirdly, there are temperature characteristics. Of these, the first and second drawbacks can be solved by simply covering the optical fiber with the same heat insulating material as shown in FIG. 4, but the third problem is that the temperature characteristics deteriorate. This is because the ambient temperature of the optical fiber increases due to the hot water pipe.

The present invention has been made in view of the above drawbacks.

FIG. 1 is a diagram showing a schematic configuration of a piping member according to an embodiment of the present invention, in which the optical fiber 6 is installed closer to the hot water return pipe 32 than the center of the piping member 34''.The hot water temperature in the hot water return pipe 31 is , is higher than the hot water temperature in the hot water return pipe 32. Therefore, according to the configuration of FIG.
It will be smaller than if it is placed at the center.

FIG. 2 is a schematic diagram of a piping member according to another embodiment of the present invention, in which a piping member 34''' has two V-shaped grooves 8, upper and lower, in its cross section.
After the optical fiber 6 is embedded in the V-shaped groove, the V-shaped groove is filled with a heat insulating material 7 of the same kind as the heat insulating material 5 or a different kind. With this length, it is possible to reduce the temperature rise of the optical fiber 6 due to the hot water flowing through the pipe 3, and it is also possible to improve the bending radius and impact resistance during installation work.

As described in detail above, according to the present invention, firstly, the optical fiber is embedded in the hot water piping member, so the installation work is easy.Secondly, the position of the optical fiber in the piping member is Since the influence of the hot water inside is limited so as to be reduced, it is possible to obtain the effect that there is little deterioration of transmission quality due to temperature characteristics.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional perspective view showing the structure of a hot water piping system according to one embodiment of the present invention, Fig. 2 is a cross-sectional perspective view showing the structure of another embodiment of the present invention, and Fig. 3 is a schematic configuration of the hot water heating system. FIG. 4 is a cross-sectional perspective view of an example of a conventional piping member. 31.32・・・Hot water pipe, 6・・・・・・
Optical fiber, 5... Insulation material, 34" 34 r
#-・・・Piping member. Name of agent: Patent attorney Toshio Nakao and one other person Figure 1 Figure 21!1 Figure 3 Figure 4

Claims (1)

[Claims] A hot water piping device comprising a hot water pipe, an optical fiber, and a heat insulating material provided around the hot water pipe and around the optical fiber, and also between the hot water pipe and the optical fiber.