JPS60233205A - Heat pipe for melting snow on road capable of been arranged in connected state - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to heat pipes, and particularly to heat pipes that are buried in parallel under the paved surface of roads and used for snow melting on roads using geothermal energy.

(Prior Art) Recently, heat pipe-type snow melting and antifreezing devices that utilize the geothermal energy of the soil and the natural thermal energy of hot spring drainage have been attracting attention. Conventionally, a device for rejecting a large number of pipes arranged in parallel at predetermined intervals of -1- is used, as shown in, for example, Japanese Utility Model Application Publication No. 54-106557. The heat receiving and evaporating section is deeply buried vertically facing the underground heat source region, and the heat dissipating and condensing section at the other end is buried horizontally under the pavement surface of the road.

(Problem to be Solved by the Invention) However, the pipe to the heater 1 used in the above-mentioned snow melting device is shaped like a crossroads and is quite long, so it cannot be used locally. Not only transporting it to the site, but also burying it underground at the construction site was a real hassle.

Moreover, since each of the many heat pipes is individually independent, design specifications such as length and heat transport capacity must be changed in accordance with differences in geothermal temperature conditions in the region. However, the standardization of heat pipes for snow melting was hindered, and the costs were high.

(Specific Object of the Invention) - In view of the above problems mentioned in Section F, the present invention aims at extracting geothermal energy by directly heating the road surface. If the heat-receiving and evaporating parts of each heat pipe under the road surface were to be heated through this heat medium circulation system, it would be possible to shorten each heat pipe, and to develop such a snow melting system. The purpose is to provide the most convenient heat pipe structure for use. That is, the present invention makes it possible to easily transport and bury a large number of heat pipes to be buried under the road surface as relatively short individual heat pipes, while also making it possible to connect the required number of heat pipes to each other during installation. The required heat energy can be easily supplied from a single heat medium circulation system that extracts geothermal heat by installing a heat exchanger, and if the amount of heat from the main heat source such as geothermal heat is insufficient, it is easy to use a separate auxiliary heat source. It is an object of the present invention to provide a heat pipe suitable for road snow melting that can be connected to the ground, and even if geothermal conditions change, the heat pipe itself can be made into a standard product.

(Means for Solving the Problems) -3- For the purpose stated in -, the present invention provides a heat medium reservoir that is attached to the evaporation section of a heat pipe body made of a single tube so as to cover the outside of the evaporation section. In addition, the present invention provides a heat pipe for use in road snow melting, etc., which can be connected in series, and is characterized in that a heat medium inlet pipe and a heat medium outlet pipe are protruded from the heat medium N vessel.

(Example) Hereinafter, the present invention will first be described with reference to the illustrated embodiments.

1 to 3 show a heat pipe according to the present invention, and the heat pipe (1'') is made of iron, copper,
A heat pipe body (1) consisting of a single tube in which a working fluid such as Freon 12, Freon 114, or methanol is sealed in a vacuum-sealed metal tube made of stainless steel, aluminum, etc.
and a short cylindrical heat medium reservoir (2) made of the same material and attached to the outside of the evaporation part (1a), which is bent into an abbreviated shape at one end, covering the core part. The heat medium reservoir (2) constitutes a heat medium reservoir part -4- (3) with a required volume between it and the evaporation part (1a) of the heat pipe main body (1), and has both upper and lower ends of the peripheral wall. A heat medium inlet pipe (4) and a heat medium outlet pipe (5) project from the heat medium in opposite directions.

When the above-mentioned heat pipe (H) is used to construct a road snow melting device, as shown in Figs. (1b) are buried in parallel in a road paving concrete (6) at a predetermined interval, and each heat medium reservoir (
Connect the heat medium inlet pipe (4) and outlet pipe (5) of 2) to the joint pipe (7).
are connected sequentially to form a heat transfer pipe.

This heat medium pipe is then connected to a heat medium circuit surrounding a geothermal source or the like. A specific aspect thereof is shown in FIG. 4.

That is, in FIG. 4, (8) is an underground heat storage tank installed underground in a geothermal source region at a required depth, and an appropriate heat storage material (9) is preferably placed inside the heat-insulating container. It is filled with. The heat storage material (9) may include, in addition to the typical water, more preferably materials with excellent heat storage performance, such as -5-calcium chloride hexahydrate, sodium sulfate decahydrate,
Paraffin and the like are sometimes used, and even soil is sometimes used. In addition, (10) is an auxiliary heat source that is installed underground or on the ground as necessary, and is configured in a heat storage tank similar to the above, and stores energy such as hot spring drainage by introducing it through the circulation pipe (11). Although it is advantageous to use a heater or other heat generating device, it is also possible to use a heater or other heat generating device. (C1) is a closed-circuit heat medium circulation circuit for snow melting that connects the heat medium pipe surrounding the heat medium reservoir (2) in the heat pipe (2) and the underground heat storage tank (8); (C2) is an auxiliary heat medium circulation circuit that connects the above heat medium pipe and the auxiliary heat source (10), and each of the above heat medium circulation circuits (C1) (C2)
The pumps (Pl) and (P2) included in the circuit selectively operate to circulate a heat medium such as water sealed inside the pump.

(Operation of the Embodiment) In the apparatus shown in FIG. 4 as described above, -6- During the snow melting/water removal operation, the pump (Pl) is started to operate the snow melting heat medium circulation circuit (C1). Then, the heat medium that has absorbed the thermal energy stored in advance in the heat storage tank (8) flows through the heat medium reservoir (2) of each P1-pipe (H). The working fluid evaporates within the evaporation section (1a) of the heat pipe body (1) facing the heat pipe body (1). This steam then rapidly flows into the condensing section (1b) due to the pressure difference within the heat pipe, where it releases latent heat of vaporization and heats the pavement concrete (6).
The working fluid condensed in b) returns to the evaporation part <1a) mainly due to the action of gravity, and by repeating the above action, snow melts on the pavement concrete (6), that is, snow melts on the road surface. At the same time, it prevents it from freezing.

By the way, in the underground heat storage tank (8), the surrounding geothermal heat is always stored, but even so, the thermal energy held by the heat storage tank (8) may be insufficient for snow melting capacity. . In such a case, by activating the auxiliary heat medium circulation circuit -7- (C2), the amount of heat sent into the heat medium reservoir (2) is supplemented and the required amount is supplied to the heat pipe (H). Snow melting heat energy can be obtained.

(Effects of the Invention) As described above, the heat pipe according to the present invention has a heat medium inlet pipe and an outlet pipe protruding from and covering the evaporation part at one end of the heat pipe main body made of a single pipe. Since it is equipped with a heat medium reservoir, it is suitable for road paving concrete.
By burying the required number of heat medium pipes in parallel under the snow melting target surface such as 1 to 1 and connecting the heat medium inlet and outlet pipes with adjacent heat pipes, a single heat medium flow path can be created under the road surface. It is possible to construct a header-type multi-type heat pipe with the evaporation section facing the front. Therefore, compared to the case of using a heat pipe configured in advance as a manifold header type, or compared to the case of using conventional individual long L-shaped heat pipes, transportation to the construction site and J! J! All facilities can be constructed easily and are efficient. In addition, since a single heat medium pipe can be constructed by sequentially connecting adjacent heat medium reservoirs, the heat medium from the geothermal heat can be passed through this pipe, and as needed. It is also possible to easily connect the heat pipe to an auxiliary heating medium, and it is easy to incorporate countermeasures in the event of a lack of geothermal heat, which in turn makes it possible to standardize and unify the heat pipe itself regardless of various changes in geothermal conditions. It becomes possible to make the snow melting device according to the specifications, and there is an advantage that the manufacturing cost and therefore the equipment cost of the snow melting device can be reduced.

[BRIEF DESCRIPTION OF THE DRAWINGS] FIG. 1 is a perspective view showing a pipe connected to a heat pipe 1 according to the present invention, FIG. 2 is a perspective view showing one unit heat pipe, and FIG. 3 is a view similar to that shown in FIG. Cross-sectional view of ■-■ line, 4th
The figure is a configuration diagram showing an example of a road snow melting device using a heat pipe according to the present invention. (H)...heat pipe, (1)...heat pipe body, (1a)...evaporation section, (1b)...heat dissipation condensation section, -9- (2)...heat medium reservoir vessel, (3) heat medium reservoir, (4)...
Heat medium inlet pipe, (5>...heat medium outlet pipe, (7)...joint pipe. Above 10-

Claims (1)

[Claims] A heat medium reservoir is attached to the evaporation section of the heat pipe main body consisting of a single tube, covering the outside of the evaporation section, and a heat medium inlet pipe and an outlet pipe are protruded from the heat medium reservoir. A heat pipe for road snow melting, etc. that can be connected in series.