JP2526280Y2 - Thermal storage snow melting system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION INDUSTRIAL APPLICATION This invention relates to a system for melting snow on roadways and sidewalks.

2. Description of the Related Art As a system for melting snow around a specific facility such as a building, a system in which hot water from a boiler is supplied to a hot water pipe buried immediately below a road surface to heat the road surface from below is generally known. For the boiler that is the heat source, a dedicated boiler is installed in the snow melting system because the system is operated only in winter and the required amount of heat or temperature is significantly different from that of other applications. From here, hot water is drawn out by a pump and circulated through the hot water pipe.

In addition, since a relatively large building has a heat source for air conditioning, surplus heat is extracted from the heat source via a heat exchanger, and the resulting hot water is circulated to a hot water pipe buried directly under the road surface. There is also a known system for melting snow.

Problems to be Solved by the Invention However, the conventional snow melting system described above requires a dedicated boiler, a pump for circulating hot water, a heat exchanger, and the like. There was a problem.

This invention was made in the background of the above circumstances,
It is an object of the present invention to provide a snow melting system in which a circulation pump and a hot water circulation path are eliminated to simplify the configuration and reduce running costs.

Means for Solving the Problems In order to achieve the above object, the present invention provides a hot water tank for heat storage, a means for heating hot water in the tank, and a part serving as a heating unit provided inside the hot water tank. A loop heat pipe that directly carries out the heat of the hot water in the tank to the outside, a heat transfer plate disposed in close contact with a part of the loop heat pipe serving as a heat radiating portion, and one end of the heat transfer plate. And a heat-dissipating heat pipe buried immediately below the ground surface in a state of being in close contact with the upper side of the heat transfer plate.

Operation In this invention, the heat for melting snow is stored as hot water. The heat of the hot water is directly transmitted to the heating section of the loop heat pipe disposed inside the hot water tank, and is transferred to the heat radiating heat pipe via the loop heat pipe. This loop heat pipe encloses a condensable fluid such as water or chlorofluorocarbon as a working fluid in a generally annular pipe in a degassed state, and the working fluid circulates with evaporation and condensation. By flowing, the working fluid is configured to transport heat as latent heat, and the hot water tank is arranged between the loop type heat pipe and the heat dissipation heat pipe in close contact with both heat pipes from the heat transfer plate If it is in a lower position, a loop thermosyphon can be used. The heat carried by the working fluid is transmitted to the heat-dissipating heat pipe via the heat-transfer plate, and the heat-dissipating heat pipe carries the heat to a location having a low temperature and dissipates the heat. Therefore, the ground surface is heated from below, resulting in snow melting.

In this case, since the loop heat pipe and the heat radiating heat pipe are configured to be able to exchange heat via the heat transfer plate, it is possible to avoid connection between the heat pipes or connection between the heat pipes via the header pipe. And the workability is improved.

Embodiment Next, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a schematic perspective view showing one embodiment of the present invention, in which a heating section 3 of a loop-type thermosiphon 2 is accommodated inside a hot water tank 1, and a heat radiating section 4 of the loop-type thermosiphon 2 is provided. Are arranged on a compacted roadbed 6 provided below the paved roadbed 5. The heating part 3 of the loop type thermosiphon 2 is formed in a helical shape in order to increase a heat exchange area with hot water, and a plurality of heat radiating parts 4 are provided between the headers 7 (two in the illustrated example). ) Is arranged. The heating section 3 and the heat radiating section 4 are connected by an ascending pipe 9 and a descending pipe 10 so as to form a circulation path as a whole. An auxiliary heater 11 such as an electric heater is provided in the middle of the ascending pipe 9, and a flow control valve 12 is provided in the middle of the descending pipe 10. Further, these heating units 3,
A condensable fluid such as chlorofluorocarbon and water is sealed as a working fluid in a circulating path including the heat radiating portion 4, the rising pipe 9, and the falling pipe 10 in a vacuum-degasified state.

On the other hand, just below the road surface, that is, in the pavement roadbed 5,
A plurality of corrugated heat pipes 13 are buried, and these corrugated heat pipes 13 and the heat radiating portion of the loop thermosiphon 2 are formed of an aluminum plate for heat transfer.
It is connected by 14 so that heat can be exchanged. In particular,
An aluminum plate 14 for heat transfer is disposed in close contact with the two pipes 8 in the radiator 4, and one end of a corrugated heat pipe 13 is disposed in close contact therewith. In order to improve the heat transfer from the aluminum plate 14 to the corrugated heat pipe 13, it is preferable to fix the corrugated heat pipe 13 to the aluminum plate 14 by heat transfer cement.

An air heat source heat pump 15 is provided to heat the hot water in the hot water tank 1.

The snow melting on the road surface by the above system is performed as described below.

When the temperature of the hot water in the hot water tank 1 is raised to a temperature sufficient for melting snow during snowfall, the heating section 3 of the loop thermosyphon 2 is heated by the hot water, and the heat radiating section 4 transfers heat to the corrugated heat pipe 13. Since the working fluid is taken away and cooled, the working fluid enclosed therein evaporates in the heating unit 3, and the vapor flows to the heat radiating unit 4, where heat is radiated and condensed. In that case,
If the amount of heat in the hot water tank 1 is insufficient, the riser 9 is heated by the auxiliary heater 11 to increase the steam flow rate of the working fluid, that is, the amount of heat transported by the working fluid. The amount of heat transported from the heating unit 3 to the heat radiating unit 4 is controlled by adjusting the flow rate of the working fluid by a flow control valve 12 provided in the downcomer pipe 10.

The loop-type thermosiphon 2 is a kind of heat pipe and has a temperature uniforming characteristic in which the entire temperature becomes the same. Get higher. Moreover, since these are connected so as to be able to exchange heat via an aluminum plate 14 having a good heat conductivity, the heat radiating part 4 is used to connect the corrugated heat pipe.
Heat is applied to one end of 13. Then, the corrugated heat pipe 13 carries heat to the front end portion and dissipates heat, so that the road surface is heated from below, and as a result, snow on the road surface is melted.

That is, in the above-mentioned system, hot water is obtained by using air as a heat source, the heat of the hot water is carried by the loop-type thermosiphon 2 to one end of the corrugated heat pipe 13, and the corrugated heat pipe 13 is heated over a wide area directly below the road surface. To heat the road surface from below.

The heat source in the present invention is not limited to hot water heated by the air heat source heat pump. That is, facilities such as relatively large buildings may be equipped with a heat pump for cooling and heating and a hot water storage tank,
This can be used to melt snow. FIG. 2 shows an example of this, wherein a heat pump 17 for cooling and heating installed in the underground part of a building 16 and a hot water storage tank 18 attached thereto are used as a heat source to melt snow at an entrance part of the building 16. It is. That is, the heating part 3 of the loop type thermosiphon 2 is installed inside the hot water heat storage tank 18, and the corrugated heat pipe 13 is buried immediately below the entrance.

With such a configuration, the heat in the hot water storage tank 18 is transferred to the loop thermosyphon 2 and the corrugated heat pipe 13.
Can be transported directly below the entrance to heat it and melt the snow.

In each of the above embodiments, an example in which a loop-type thermosiphon is used is shown, but a heat pipe provided with a wick or the like for returning the working fluid to the heating unit may be used instead. it can. In the present invention, the heat pipe buried immediately below the road surface is not limited to a corrugated heat pipe.

Effect of the invention As explained above, the system of the invention does not transport heat by circulating hot water, but directly transports heat from the heat source by a loop heat pipe, eliminating the need for circulating equipment such as a hot water pump. Thus, the configuration can be simplified and the running cost can be reduced.

In addition, since a heat transfer plate is arranged between the loop type heat pipe and the heat pipe buried just below the road surface, it is configured so that both can be exchanged heat through it.
No special seal is required, and the workability is good.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view showing one embodiment of the present invention, and FIG. 2 is a schematic exploded view showing another embodiment. 1 ... hot water tank, 2 ... loop thermosyphon, 3 ...
Heating part, 4 ... heat radiation part, 5 ... paved roadbed, 13 ... corrugated heat pipe, 14 ... aluminum plate, 15 ... air heat source heat pump, 17 ... cooling and heating heat pump, 18
…… Hot water heat storage tank.

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Koichi Masuko 1-5-1, Kiba, Koto-ku, Tokyo Inside Fujikura Electric Wire Co., Ltd. (72) Inventor Masahiko Ito 1-5-1, Kiba, Koto-ku, Tokyo Fujikura Electric Wire Incorporated (72) Inventor Yuji Saito 1-5-1 Kiba, Koto-ku, Tokyo Fujikura Electric Wire Co., Ltd. (56) References Jikai Sho 61-90924 (JP, U)

Claims (1)

(57) [Scope of request for utility model registration] 1. A hot water tank for storing heat, means for heating hot water in the tank, and a part serving as a heating unit are disposed inside the hot water tank, and the heat of the hot water in the tank is directly carried out to the outside. A loop-shaped heat pipe, a heat transfer plate disposed in close contact with a part of the heat-dissipating portion of the loop-type heat pipe, and a ground surface in which one end thereof is in close contact with the heat transfer plate. A heat storage type snow melting system, characterized by comprising a heat pipe for heat dissipation buried immediately below.