JPS60126403A - Heat pipe type snow melting system - 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 The present invention relates to a heat/eve type snow melting system that utilizes the switching action of a heat/escape by the flow/stop of water flowing in a header pipe.

In recent years, geothermal heat extracted from heat pipes has been used to melt snow that has fallen on slopes, shopping streets, or parking lots.

A conventional heat pipe type snow melting system, for example, as shown in Fig. 1, is to dig a hole vertically on the shoulder of a road and bury the entire vertical part IA of a heat pipe 1 in an inverted shape 2 underground. The IB was buried along road surface 3 to a depth of several α.

A plurality of these inverted-shaped heat pipes 1 are buried at intervals of 20 to 30 crn along the longitudinal direction of the road, and the geothermal heat is sucked up by the vertical part IA of the heat pipe ~, and the heat is radiated from the horizontal part IB and falls onto the road surface 3. Lightning causes all the snow to melt.

However, since the conventional heat pipe section IB is 2 to 7 m long and the vertical section IA is about 8 to 12 m long and has an inverted shape, it is difficult to transport it from the factory to the site.

Moreover, in order to uniformly melt snow on the road surface 3, a large number of pipes must be arranged at intervals of 20 to 30 α from the heat transfer range, regardless of the pipe diameter of the horizontal part IB. Therefore, it was necessary to use a large number of thin heat pipes 1 and to dig deep holes according to the number of heat/IP f1 for completely burying the vertical portion IA, which required a lot of work.

In addition, in conventional systems, Heatno and Eve 1 remain installed underground 2, so when the outside temperature becomes low, such as in early winter or at night, Heat Pie f1 operates even when it is not snowing and wastes geothermal heat. It will be released. As a result, in the latter half of winter, even if it snows, since the underground temperature has already dropped, sufficient heat cannot be extracted to the road surface 3, making it impossible to effectively melt the snow.

Note that if the vertical part IA of heat pie f1 hits the underground water channel, all the heat can be removed continuously, but this is also only for heat pipe f1 that hits the ground water, and it is installed in a place away from this. has the same problem as mentioned above,
The drawback is that the snow melting effect disappears in the latter half of winter.

The present invention has been developed as a result of various studies in view of the above points.The present invention has been developed to make heat pipes straight to facilitate transportation, and to reduce the number of heat pipes to be buried vertically to reduce the amount of burying work. We have developed a heat pipe type snow melting system that is equipped with a switch mechanism to prevent unnecessary heat dissipation in early autumn and can effectively melt snow until late winter, as well as melting snow evenly over the entire road surface. .

That is, in the present invention, a plurality of heat pipes are buried vertically in the ground at predetermined intervals, and the upper end of each heat pipe is connected to the inside of a header pipe that is buried along the road surface and has a complete circulation channel. At the same time, a plurality of heat nozzles, eaves, or circulation nozzles and ears buried along the road surface are installed in the header pipe.
t connection, and a circulation pump is provided in the circulation waterway of the ladder pipe.

Embodiments of the present invention will be described in detail below with reference to the drawings.

FIGS. 2 and 3 show an embodiment of the present invention.

In the figure, 4 is a header pipe, which is buried along the road surface 3 and forms a circulation waterway 6 through which water 5 flows. A circulation pump 7'7 and an auxiliary boiler 8 are provided in the middle of the circulation waterway 6.

Nine straight heat grooves are buried vertically in the ground 2 at predetermined intervals along the longitudinal direction of one side of the header pipe 40, and their upper ends 9a are inserted into the inside of the header pipe 4. and is brought into contact with water 5.

A heat pipe 10 is buried approximately horizontally along the road surface 3 and is arranged at a slight inclination, with its lower end inserted into the ladder pipe 4 so as to come into contact with the water 5. ing. The approximately horizontally arranged heat pipes fio have a smaller pipe diameter than the vertically buried heat pipes ``9'', and are installed in large numbers, and are installed at intervals of 20 to 30 α along the longitudinal direction of the header pipe 4. At the same time, plate fins 11 are installed parallel to the road surface 3.These heat pipes 5-9, 10 are made of iron pipes, for example, and are filled with ammonia or methanol as a working fluid. The great fins are provided as necessary and do not need to be provided.

Next, the operation of the snow melting system having the above configuration will be explained.

When the outside temperature is low and there is no snowfall, such as in early autumn, if the operation of the circulation pump f7 is stopped, the water 5 in the header pipe 4 does not flow and remains stationary. The upper end 91L of the heater buried vertically underground 2) is inserted into the header pipe 4 and is in contact with the water 5, but since the water 5 is stationary, the heat transfer is limited. The amount is extremely small and there is almost no geothermal heat radiation. Therefore, the increase in water content inside the header pipe 4 is extremely small, and the heat transfer effect by the substantially horizontal heat pie fio that comes into contact with it is also in a state where it is not stopped, so there is no unnecessary release of geothermal heat, and a drop in geothermal temperature is prevented. can do.

When it rains in winter, the circulation pongua is operated to flow water 5 through the header pipe 4 and circulate it through the circulation waterway 6. When water 5 starts flowing,
The upper end 9a of the vertically buried heat pipe 9 inserted into the header pipe 4 comes into contact with the flowing water 5, and heat transfer occurs at lightning speed, and the water 5 is heated by absorbing geothermal heat.

In this case, when comparing the heat transfer noise at the upper end 9aVc of the heat via "9" when the water 5 is in a static state and in a flowing state, for example, it is 50 to 100 k/m in a static state.
2h℃, while in the fluid state it is 2000-300℃.
0 kQIIj/m2hU, and the stoppage of the flow of water 5 within the header pipe 4 essentially acts as a switch to activate and deactivate the heat vias 9 and 10.

As a result, the water 5 with increased humidity flows through the circulation channel 6 kW, and due to the heat transfer action of the Heat Inno 10 that comes into contact with it,
The heat is transmitted along the road surface 3 and is further transmitted through the entire great fin 11 to heat the entire road surface 3, thereby melting the accumulated snow.

In addition, when snowfall is large and snow cannot be melted sufficiently by heat transfer from geothermal heat, the auxiliary boiler 8 attached to the circulation channel 6 of the header pipe 4 can be operated to further raise the water temperature. It can melt snow.

In addition, the heat via f9 buried vertically and the heat pie fxo buried approximately horizontally along the road surface 3 are the header tube 4.
Because they are thermally connected through all the water circulating inside,
The road surface 3f can be heated uniformly. In other words, when any of the vertically buried heat vias 09 hits the underground water channel, all of the heat is absorbed continuously, and this heat heats the water in the header pipe 4 by 5Yt, which circulates. , and each heat via 10 arranged approximately horizontally...
・Since the heat is transmitted to the road surface 3 uniformly and efficiently, it can achieve functions and effects that cannot be obtained with the conventional inverted-shaped heat sinks buried individually in parallel. Can be done.

In addition, as the vertically buried heat pipe 9, a top heat type with a wick inside was used, and
By installing the heat source buried along the horizontal axis, it is possible to perform the full heat storage function in the summer.

The circulation pump 7 is operated in the summer when the amount of solar radiation is large and the road surface 3 is heated to a high temperature. Heat from the road surface 3 is transferred to the header pipe 4 through the plate fins 11 and the horizontal heat pipe 10I=a, and heats the water 5 circulating inside. Furthermore, heat is transmitted vertically to the underground 2 by the top heat type heat via 9 that comes into contact with the heated water, raising the temperature of the ground and allowing heat to be stored.

FIG. 4 shows another embodiment of the present invention, in which four header tubes are formed into a U-shape and are buried along the road surface 3, and further along the longitudinal direction of one side, a plurality of header tubes are formed at predetermined intervals. A heat ear 9 is vertically buried in the ground. Furthermore, in the U-shaped middle part of the header pipe 4, a plurality of heat pipes 9 are installed perpendicularly to both sides of the header pipe 4. The circulation channels 12... are connected to form a continuous circulation waterway 6. In the middle of the circulation waterway 6 of the header pipe 4, there is a circulation pump and an auxiliary boiler in the middle of the circulation waterway 6. 8 is provided.

In the above-mentioned snow melting system, when the circulation pump 7 is operated during snowfall in winter, the vertically buried heat pipe 9 is operated to suck up geothermal heat and heat the water 5 in the circulation channel 6. This heated 5-water header pipe 40 runs through the narrow circulation line 12 in parallel from one side, heats the road surface 3 and melts the snow, and the cooled water circulates through the header pipe 4 again. It is heated by a heat pipe 9.

In this case as well, by stopping the operation of the circulation bong 7'''7, the operation of the heat pipe 9 can be stopped, thereby completely preventing unnecessary heat radiation.

In the above embodiments, the auxiliary boiler 8 is provided in the circulation waterway 6 of the header pipe 4, but it is not necessarily necessary to provide the auxiliary boiler 8 if the boiler is installed in a place with little snowfall.

As explained above, according to the heat pipe type snow melting system according to the present invention, the heat pipes and snow melting systems are made straight to make transport easier, and the number of heat pipes buried vertically can be reduced. This makes the excavation and installation work easier, and the switch mechanism installed on the Pitno 9 Ig prevents unnecessary heat radiation in early autumn and allows for effective snow melting until late winter, as well as evenly melting snow over the entire road surface. It has remarkable effects such as:

[Brief explanation of the drawing]

FIG. 1 is a vertical cross-sectional view showing a conventional snow melting system using an inverted-shaped heat pipe, FIG. 2 is a vertical cross-sectional view showing a snow melting system according to an embodiment of the present invention, and FIG. FIG. 4 is a perspective view showing the entire snow melting system. FIG. 4 is a perspective view showing a snow melting system according to another embodiment of the present invention. 1.9.10...Heat pipe, 2...Underground, 3.
...Road surface, 4...Header pipe, 5...Water, 6...
Circulation water channel, 7... Circulation pump, 8... Auxiliary roller, 1... Plate fin, 12... Circulation mother Eve. Applicant's representative Patent attorney Takehiko Suzue Continued from page 16-1> Inventor Jun Ishii 17-2-6-1 Marunouchi Kinsha, Chiyoda-ku, Tokyo Furukawa Electric Co., Ltd.

Claims (2)

[Claims] (1) A plurality of heat pipes are buried vertically in the ground at predetermined intervals, and the entire upper end of each heat pipe is connected to the inside of a header pipe that is buried along the road surface and forms a circulation waterway. A heat pipe type snow melting system, characterized in that a plurality of heat pipes or circulation pipes buried along the road surface are connected to the header pipe, and a circulation pump is provided in the circulation waterway of the header ladder pipe. (2) The heat pipe type snow melting system according to claim 1, characterized in that an auxiliary roller is provided in the circulation waterway of the header pipe.