JPH083479Y2 - Antifreeze water pipe - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an antifreeze type water pipe which prevents accidental freezing and rupture of water pipes that occur in cold regions in winter.

[0002]

2. Description of the Related Art Conventionally, as an antifreezing type water pipe as described above which is piped in households and the like, a ribbon heater is wound around after the pipe is installed, and after heat insulation is performed, a ribbon heater is provided by a temperature controller. It is known to control the water temperature to an appropriate temperature to heat the water pipe to prevent freezing.

[0003]

However, in the above-mentioned configuration, there are three construction steps, that is, the piping construction of the water pipe, the winding construction of the ribbon heater, and the heat insulation construction. There is a problem that a pipe part that is not wrapped around is generated, causing a water pipe freeze rupture accident.

[0004]

In order to solve the above-mentioned problems, the antifreezing type water pipe according to claim 1 has a heat conducting means excellent in heat conductivity on the outer wall of the water pipe. while that will be adhered along the direction laminated, an insulator having an excellent and electrical insulation properties in thermal conductivity, and the electrode plate for supplying electricity to the PTC thermistor order of heating is supplied with electricity from the electrode plate The heating element is provided such that a layer made of an insulator abuts on the surface of the heat conducting means, and the water pipe,
A heat insulating material is provided to cover the heat conducting means and the heat generating means.
Are, Keru Contact to the heat conducting means, surface contacting the outer wall of the water pipe, while being formed in a concave arc-shaped to fit the outer wall surface contacting with the heating means plane It is characterized by being molded into a shape.

[0005] Antifreeze type water tube according to claim 2, wherein, in order to solve the above-mentioned division <br/> problem, the antifreeze type water tube according to claim 1, wherein the outer so as to cover the heat insulator The pipe is the above water pipe
It is installed coaxially with and has a double pipe structure with a water pipe and an outer pipe.
It is characterized in that it forms a.

[0006]

According to the constitutions of claims 1 and 2 above,
The heat generated by the positive temperature coefficient thermistor is transferred to the heat conduction means bonded to the outer wall of the water pipe through the electrode plate and insulator, so that the tap water in the water pipe is heated and freezing of the tap water is avoided. can do.

Further, in the heat conducting means, the surface contacting the outer wall of the water pipe is formed into a concave arc shape so as to fit the outer wall, while the surface contacting the heat generating means is formed into a flat surface. By this, the heat generated from the heat generating means is transferred to the outer wall of the water pipe through the heat conducting means without waste, and the heat conducting means is excellent in heat conductivity. Since the water is also transmitted in the longitudinal direction of the water pipe along the heat conducting means, the water pipe can be efficiently heated over a wider range.

Further, since the electrode plate for supplying electricity to the heat generating means and the heat conducting means are insulated by the insulator, the occurrence of electric leakage is prevented.

Moreover, in each of the above constructions , the heating means and the disconnection
Since the heat material and the water pipe are integrally provided, the construction work only requires piping work, and the construction period can be shortened compared to the conventional three-stage construction work such as piping, heater installation, and heat retention process. It is also possible to reduce construction mistakes that would result in a pipe section to which no heat generating means is attached.

In addition, in each of the above-mentioned constitutions, the heat generating means is composed of a positive temperature coefficient thermistor, so that it is superior in durability as compared with the conventional ribbon heater, and the temperature rising speed is high, and the positive temperature coefficient is further improved. Since the thermistor has a self-temperature control function, the conventional temperature controller can be omitted and the size can be reduced.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The following will describe one embodiment of the present invention with reference to FIGS. As shown in FIG. 1, the antifreeze type water pipe is a coaxial double pipe, and a metal plate 2 having good heat conductivity is provided on the outer peripheral surface of the inner pipe (water pipe) 1 along the length direction. A PTC heater (heat generating means) 3 which is adhered and formed in a substantially rectangular plate shape is provided at a predetermined position on the metal plate 2 so that its longitudinal direction extends along the axial direction of the inner tube 1.

Therefore, when the antifreeze type water pipe is cut out in the radial direction in order to adjust the length thereof, the portion corresponding to the PTC heater 3 indicated by L ₁ in the figure is excluded, In Fig. 1, the antifreeze type water pipe indicated by L ₂ is cut out in the radial direction and the length is adjusted before use.

The contact surface of the metal plate 2 with the outer peripheral surface of the inner tube 1 is formed in a concave arc shape so as to fit with the outer peripheral surface, while facing the PTC heater 3 of the metal plate 2. The surface to be shaped is flat.

Further, as shown in FIG. 2, the inner pipe 1,
A heat insulating material 4 is provided so as to cover the metal plate 2 and the PTC heater 3, and an outer tube (outer tube) 5 is provided so as to cover the heat insulating material 4 so as to be coaxial with the inner tube 1. It has a double pipe structure.

As shown in FIG. 3, the PTC heater 3 is excellent in thermal conductivity and electrically insulating through a PTC ceramics 3c which is a rectangular plate-shaped positive temperature coefficient thermistor and an electrode plate 7 which supplies electricity to the PTC ceramics 3c. And a plate-shaped insulator 6 made of alumina or the like.

The electrode plate 7 and the insulator 6 are formed so as to extend further integrally from the longitudinal end portion of the PTC ceramics 3c. Therefore, the electrode plate 7 is formed with an exposed surface 7a and the exposed surface 7a. The first lead wire 8 is soldered to the first lead wire 8, while the second lead wire 9 is soldered to the electrode surface 3b of the substantially plate-shaped PTC ceramics 3c that faces the surface that contacts the electrode plate 7.

The material of the inner tube 1 and the outer tube 5 is not particularly limited as long as it can withstand the heat generation temperature of the PTC heater 3 used and can withstand water pressure, but vinyl chloride resin or the like is used. It

The PTC ceramics 3c is a material having a positive temperature coefficient,
For example, a thermosensitive element which is made of a ceramic semiconductor containing barium titanate as a main raw material and has a low resistance from room temperature to the Curie temperature Tc (rapid change temperature), but has a characteristic that the resistance value sharply increases when the Curie temperature Tc is exceeded. As a positive temperature coefficient thermistor.

With this characteristic, when a voltage is applied to the PTC ceramics 3c, initially, the resistance is low, so that the initial power consumption is large and the temperature rises sharply, and when the temperature exceeds the Curie temperature, the resistance value sharply increases. This significantly reduces power consumption. As a result, PTC ceramics 3
c does not rise above a certain temperature and maintains a stable temperature, and has a self-temperature control function.

Incidentally, the Curie temperature Tc of the PTC ceramics 3c can be arbitrarily set within the range of about 30 to 250 ° C. depending on the material composition. In the PTC ceramics 3c in the above-mentioned embodiment, an internal pipe effective for preventing freezing of tap water is used. The Curie temperature Tc is set in consideration of safety and power saving.

The shape and size of the PTC ceramics 3c are not particularly limited, but the PTC ceramics 3c are formed into a plate shape according to the sizes of the inner tube 1 and the metal plate 2.

According to the configuration of the above embodiment, the water pipe is P
Since the TC heater 3 is integrally provided, the tap water in the water pipe can be heated to prevent freezing, and the freezing of the tap water can be avoided. In addition, the construction described above requires only piping work, and the construction period can be shortened and cost can be reduced as compared with the conventional method of installing a heater after piping, such as the three-stage construction of piping, heater attachment, and heat retention step. In addition, it is possible to prevent construction mistakes such as forgetting to attach the heater, and it is possible to surely achieve antifreezing.

Moreover, in the above-mentioned structure, since the PTC heater 3 is provided with the PTC ceramics 3c as the positive temperature coefficient thermistor, the durability is excellent and the temperature rising speed is high as compared with the conventional ribbon heater. Furthermore, since the PTC ceramics 3c has a self-temperature control function,
The conventional temperature controller can be omitted and the size can be reduced.

In the above structure, an example in which the PTC heater 3 is provided in a normal water pipe is given, but the PTC heater 3 is
As shown in FIG. 4, it may be provided in a water pipe (joint member) 1 for a joint having a short axial length such as a joint. With such a configuration, it is possible to omit the work of cutting out for adjusting the length, and it becomes easy to attach it to a necessary place. Further, as shown in FIG. 5, it may be provided in a bent portion of the water pipe 1 or in the bent joint water pipe 1.

[0025]

Antifreeze type water pipe according to claim 1, wherein, according to the invention], as described above, while the thermal conduction means having excellent thermal conductivity on the outer wall of the water pipe Ru are bonded along the longitudinal direction, the thermally conductive Which is excellent in electrical insulation, an electrode plate for supplying electricity, and a positive temperature coefficient thermistor for generating heat by supplying electricity from the electrode plate are laminated in this order, The surface is provided with a layer made of an insulator , and the water pipe, the heat conducting means, and the heat generating means are provided.
Heat insulating material is provided so as to cover, Keru to <br/> Contact the heat conducting means, surface contacting the outer wall of the water pipe is formed in a concave arc-shaped to fit the outer wall On the other hand, the surface contacting the heat generating means is formed into a flat shape.

As described above, the antifreezing type water pipe according to claim 2 has the above-mentioned heat insulation in the antifreezing type water pipe according to claim 1.
An outer pipe is provided coaxially with the water pipe to cover the material.
It has a double pipe structure of a water pipe and an outer pipe .

Therefore, with the above-mentioned structure, it is possible to prevent the freezing of tap water by efficiently heating the water pipe, and at the same time, use an insulator between the electrode plate and the heat conducting means.
By it is possible to prevent the occurrence of leakage because it is insulated
It is possible, and the heat generating means and the heat insulating material and the water pipe are integrated.
Since it is physically installed, the construction work only requires piping work, and the construction period can be shortened compared to the conventional three-stage construction work such as piping, heater installation, and heat retention process, and forgetting to install the heater, etc. This has the effect of reducing construction errors.

[Brief description of drawings]

FIG. 1 is a perspective view of an antifreezing type water pipe of the present invention.

FIG. 2 is a radial cross-sectional view of the antifreeze type water pipe.

FIG. 3 is a partial cross-sectional view in the longitudinal direction of the antifreezing type water pipe.

FIG. 4 is an axial sectional view of a modified example of the antifreezing water pipe.

FIG. 5 is a partially cutaway perspective view of another modified example of the antifreezing water pipe.

[Explanation of symbols]

1 inner pipe (water pipe) 2 metal plate (heat conduction means) 3 PTC heater (heat generation means) 4 heat insulating material 5 outer pipe (outer pipe)

Claims (2)

[Scope of utility model registration request] 1. A While heat conduction means having excellent thermal conductivity on the outer wall of the water pipe Ru are bonded along the longitudinal direction, an electrode for supplying an insulator, an electric with excellent and electrically insulating thermal conductivity a plate, with a PTC thermistor for heating is supplied with electricity from the electrode plate heating element formed by stacking in sequence is provided as a layer made of the surface insulator of the heat conducting means are in contact, the Water pipe, heat transfer means, and heat generation means
Insulation is provided so as to cover, Keru Contact to the heat conducting means <br/>, surface contacting the outer wall of the water pipe, is formed in the concave arc shape to fit the outer wall On the other hand, an antifreezing type water pipe characterized in that the surface contacting the heat generating means is formed in a flat shape. 2. An outer tube is provided to cover the heat insulating material.
It is installed coaxially with the water pipe, and has a dual water pipe and outer pipe.
The antifreezing type water pipe according to claim 1 , which has a pipe structure .