JP2006241862A - Heat pipe type snow melting device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To heat an operating fluid with a small number of electric heaters, to make heat pipes thin and to facilitate replacement and repair of a heating means for heating the operating fluid by heating the operating fluid in a plurality of heat pipes for exchanging heat, by a common heat source. <P>SOLUTION: The plurality of heat pipes 21, 22, 23, 24 vacuum sealed in a snow melting unit 20 and filled with the operating fluid 33 vaporized at a low temperature, are allowed to communicate with one another by a heating pipe 26 having a diameter larger than the heat pipes, and a heater mounting pipe 27 provided at the end of the heating pipe is provided with the electric heater 35 for heating the operating fluid 33. The vicinity of a heat pipe mounting part provided at either end is inclined to locate the tip part of the heat pipe outward from the end of the heating pipe. <P>COPYRIGHT: (C)2006,JPO&amp;NCIPI

Description

  The present invention relates to a snow melting device that melts snowfall or snow accumulation, and relates to a heat pipe type snow melting device that can efficiently melt snow by using an electric heater in a heat pipe.

  Conventionally, on snowy roads, railway crossings, and the like, snow accumulation has interfered with vehicle or human traffic or railway operation, so it has been necessary to melt and remove the snow that has fallen. As a means for melting snow, an electric heater or a heat pipe is buried below the road surface or level crossing surface to melt the snow, and the road surface or level crossing surface is heated to melt and remove the snow.

  A conventional snow melting apparatus using a heat pipe is described in, for example, Japanese Patent Application Laid-Open No. 60-233204.

  As shown in FIGS. 9 to 12, in the conventional snow melting apparatus, a heat pipe 2 is embedded in a concrete panel 1, and the heat pipe 2 has a header 4, 5 cross-connected to the heat radiating portion orthogonally at both ends. Have

  As shown in FIG. 12, in order to melt snow, the pumps P1 and P2 are activated, and the snow melting heat medium circulation circuits C1 and C2 are operated. As a result, the heat medium that has absorbed the heat energy stored in the heat storage tank 8 circulates through the heat medium flow pipes 6 and 7 in the steam headers 4 and 5, thereby operating the heat pipe 2 in the evaporation headers 4 and 5. Allow the fluid to evaporate. Then, the steam flows through the condensing tube portion 3 where the latent heat of evaporation is released to melt the concrete panel main body 1 with snow.

  Since the conventional snow melting apparatus uses steam to heat the working fluid, the joints between the heat medium circulation pipes 6 and 7 and the heat circulation circuits C1 and C2 are loosened while being used for many years. There was a leak. In addition, since a boiler was used to heat the steam, it was necessary to replenish the fuel, which was inconvenient especially when using a snow melting device at a crossing in a mountainous area.

  Therefore, there is a snow melting device that uses a coiled electric heater to heat the crossing part that melts snow, but if a coiled heater is used, magnetism may be generated, causing the traffic light to malfunction, and a snow melting device for the level crossing surface. As inappropriate.

  As shown in FIG. 13, there is a heat pipe type snow melting device that heats a working fluid using an electric heater instead of heating the working fluid with steam.

  The heat pipe includes a metal heat pipe 13 in which a working fluid 12 is sealed, a cartridge-type electric heater 14 provided in an opening at the lower end of the heat pipe 13, and a power source 15 that generates heat from the electric heater 14.

As shown in FIG. 14, the heat pipe is embedded in a pavement block 16 having an appropriate size so that a road surface or a level crossing surface can be laid. The pavement block 16 formed as described above is laid on a road surface or level crossing surface that needs to melt snow. The electric heater 14 is heated by supplying electric power from the power source 15 to the electric heater 14 of the heat pipe 13 embedded in the pavement block 16. When the electric heater 14 generates heat, the working fluid 12 near the electric heater 14 evaporates, moves through the heat pipe 13 and dissipates heat. Heat is radiated outward from the radiated heat pipe 13, and the pavement block 16 is heated to melt and remove snow. The dissipated working fluid 12 condenses and descends and returns to the vicinity of the electric heater 14.
JP-A-60-233204 JP 2000-38703 A Japanese Patent Laid-Open No. 5-179836

  As described above, in the heat pipe type snow melting device in which the working fluid is heated by the electric heater 14, it is necessary to provide the electric heater 14 in each of the heat pipes 13, so that the heat pipe 13 becomes thick. In addition, since the heat pipe 13 needs to be inclined so that the condensed hydraulic fluid is lowered and immersed in the electric heater 14, the pavement block 16 in which the heat pipe 13 is embedded is inclined to the thickness of the heat pipe 13. I had to make it thick.

  Moreover, since the cartridge type electric heater 14 was provided for each heat pipe 1, in order to supply electric power from the power source 15 to each electric heater 14, a large number of distribution lines were required, and it took time for maintenance and management.

  As shown in FIG. 15, the pavement blocks 16A and 16B may be installed side by side when the portion of the road surface that melts snow is wide. In order to insert the electric heater 14A into the heat pipe 13, the pavement block 16A and the pavement block 16B It is necessary to provide a gap between the heat pipes 13A and 13B, the snow melting surface 17 where the heat pipes 13A and 13B are not installed becomes wide, and there is a possibility that the snow cannot be sufficiently melted and snow remains.

  Moreover, since it was necessary to embed the heat pipe 13 on the road surface, the electric heater 14 provided on the heat pipe 13 was also buried under the road surface, and it took time for maintenance and management.

According to the present invention, the working fluid in a plurality of heat pipes performing heat exchange is heated by a common heat source, so that the number of electric heaters can be reduced and the heat pipe can be thinned, and the heating means for heating the working fluid is provided. It is designed to make replacement repair easy.
A plurality of heat pipes sealed with a working fluid that is vacuum-sealed and vaporized at a low temperature; a heating pipe having a diameter larger than that of the heat pipe; one end communicating with each other and the heat pipe communicating with each other; The electric heater comprises: a heater attachment pipe provided at an end; and an electric heater that is inserted through an opening located in a direction orthogonal to a heat pipe of the heater attachment pipe and that heats the working fluid. A heat pipe type snow melting device is provided in which the working fluid heated in step (1) is efficiently vapor-transferred by vacuum sealing, and the heated heat is rapidly transmitted to the plurality of heat pipes.

Even when the present invention is provided adjacent to the snow melting unit, the electric heater can be taken out without being disturbed by the adjacent unit.
A plurality of heat pipes sealed with a working fluid that is vacuum-sealed and vaporized at a low temperature, a heating pipe having a larger diameter than the heat pipe, and one end of the heat pipe communicating with each other, and an end of the heating pipe And a snow melting unit provided with an electric heater that is inserted through an opening located in a direction orthogonal to the heat pipe of the heater mounting pipe and that heats the working fluid, and has both ends of the heating pipe There is provided a heat pipe type snow melting device in which the vicinity of a mounting portion of a heat pipe provided in the section is inclined outward and the tip of the heat pipe is positioned outward from the heating pipe.

  The present invention provides a heat pipe type snow melting apparatus characterized in that the electric heater is provided in heater attachment pipes at both ends of a heating pipe.

  The present invention provides a heat pipe type snow melting device in which an inner heat pipe of the snow melting unit is embedded in a pavement member constituting a road surface or a level crossing surface, and an opening of a heater mounting pipe provided with at least the electric heater is exposed from the pavement member. provide.

  According to the present invention, a plurality of the snow melting units are provided in accordance with the area of a road surface or a railroad crossing surface where snow melting is required, one or two electric heaters provided in the snow melting unit are divided into blocks, and a power source is provided for each block. Provided is a heat pipe type snow melting device that is wired to supply electric power to the electric heater.

  Since the heat pipe type snow melting apparatus of the present invention is unitized by communicating the lower ends of a plurality of heat pipes, the heat pipe can be easily embedded in a wide area such as a road surface.

  In the heat pipe type snow melting device of the present invention, since the heat pipe and the heating pipe in which the working fluid moves are evacuated, an electric heater is not provided for each heat pipe, and one or more is provided at the end of the heating pipe connected to the heat pipe. Even if two places are provided, there is little resistance in the heat pipe, and the working fluid can be moved quickly and the thermal efficiency can be improved.

  In the heat pipe type snow melting device of the present invention, since the electric heater is provided only in the heating pipe and it is not necessary to provide in the heat pipe, the heat pipe can be made thin and only the heat pipe needs to be inclined, so that the road surface or level crossing surface to be embedded Can be thinned.

  In addition, the heat pipe type snow melting device of the present invention shares an electric heater that heats several heat pipes, so it can be reduced and even when many snow melting units are installed, the wiring supplied from the power source to each electric heater can be reduced, and installation and maintenance can be performed. Easy to manage.

  Furthermore, since the heat pipe snow melting device of the present invention is provided with an electric heater in the heater mounting pipe of the heating pipe separated from the heat pipe, the opening of the heater mounting pipe is exposed when the snow melting unit is embedded in the road surface or the railroad crossing surface. it can. Therefore, maintenance and management of the electric heater are facilitated.

  The heat pipe of the heat pipe type snow melting apparatus of the present invention is provided with an electric heater for heating the working fluid inserted through an opening located in a direction orthogonal to the heat pipe of the heater mounting pipe, and the outermost heat pipe facing outward. Since the tip is inclined, even if the snow melting units are laid vertically and horizontally according to the snow melting area, the electric heater can be attached and detached without being disturbed by the adjacent snow melting units, so the heat pipes that melt snow can be arranged at equal intervals. Snow can be melted evenly on road surfaces or level crossings.

  1 to 8 relate to a heat pipe type snow melting device of the present invention.

  FIG. 1 is a cross-sectional view of the heat pipe type snow melting apparatus of the present invention.

  The snow melting unit 20 includes heat pipes 21, 22, 23, 24, a heating pipe 26, a heater attachment pipe 27, and the like.

  The heat pipes 21, 22, 23, and 24 are made of a metal having good thermal conductivity such as copper, stainless steel, or iron, and are sealed with caps 28, 29, 30, and 31. Although four heat pipes 21, 22, 23, and 24 are provided in FIG. 1, nine or ten heat pipes may be provided as many as necessary. Further, the outermost heat pipes 21 and 24 are inclined in the vicinity of the mounting portion so that the electric heater described later can be inserted and removed, and the tip portion is positioned outward from the end portion of the heating pipe 26. I have to.

  The heating pipe 26 has a larger diameter than the heat pipes 21, 22, 23, and 24, and is orthogonal to each of the heat pipes 21, 22, 23, and 24, and communicates with the lower ends thereof, so , 24 are communicated. The heat pipes 21, 22, 23, 24 are vacuum-sealed by vacuuming them from the open ends, evacuating the interior, sealing the working fluid 33, and welding the caps 28, 29, 30, 31. As the working fluid 33, alcohol, methanol or the like which evaporates at a low temperature is used.

  At both ends of the heating pipe 26, heater attachment pipes 27 whose openings are positioned orthogonal to the heat pipes 21, 22, 23, 24 are provided. The heater mounting tube 27 is provided so as to be isolated from the working fluid 33 and so that the outer periphery of the end is in close contact with the inner periphery of the heating pipe 26 so that the working fluid 33 does not leak.

  A cartridge-type electric heater 35 is inserted into and attached to the heater attachment tube 27 from an opening located in a direction orthogonal to the heat pipes 21, 22, 23, and 24. Electric power is supplied to the electric heater 35 from a power source 36 via an electric wire 37. The power supply 36 has a built-in control device, which detects the amount of snow, the temperature, the time, etc., and controls the amount of electricity supplied to the electric heater 35 to save power.

  In FIG. 1, the electric heater 35 is attached only to one heater attachment pipe 27 of the heating pipe 26, but 10 or 11 and a large number of heat pipes 21, 22, 23, 24. If the heating capacity is insufficient, the electric heater 35 may be provided on the heater mounting tubes 27 at both ends of the heating pipe 27.

  2 to 4 are a transverse sectional view, a plan view, and a partially omitted longitudinal sectional view of the heat pipe type snow melting device of the present invention. When the snow melting unit 20 is directly buried under the road surface or level crossing surface where the snow melts, the snow melting unit 20 is buried in an appropriately large pavement member to form the snow melting device block 40, and the snow melting device There is a case where the block 40 is used by being laid on a road surface or a railroad crossing surface that melts snow.

  As shown in FIG. 2 to FIG. 4, the snow melting device block 40 is provided with a cut road bed 41 serving as a foundation for pavement at the lowermost part, and the cut road bed 41 is stably treated with asphalt 42. Heat pipes 21, 22, 23, 24 are placed on the stabilized asphalt 42, and the heat pipes 21, 22, 23, 24,. Finally, the coarse density ascon 43 in which the heat pipes 21, 22, 23 and 24 are buried is reinforced with the coarse density gap ascon 44 to form the snow melting device block 40.

  As shown in the longitudinal sectional view of the enlarged snow melting device unit in FIG. 4, the heat pipes 21, 2223, 24 are inclined because the condensed working fluid 33 needs to be lowered to the heating pipe 27. However, the heating pipe 27 does not need to be inclined because it only accumulates the condensed working fluid 33 and heats it. Moreover, since the heat pipes 21, 22, 23, and 24 and the heating pipe 27 are separated, the heat pipes 21, 22, 23, and 24 are thinned. Accordingly, the coarse density ascon 43 can be made thinner and the snow melting device block 40 can be made thinner than in the conventional case of FIG.

  Since the snow melting unit 20 of the present invention is divided into the heat pipes 21, 22, 23, 24 and the heating pipe 27, the heat pipes 21, 22, 23, 24 of the present invention are different from the conventional heat pipe of 27.2 mm. It becomes 12 mm, and the layer of the coarse density ascon 43 in which the heat pipes 21, 22, 23, and 24 are embedded can be reduced to half or less than the conventional one. Therefore, the snow melting device block 40 can be reduced in weight and thickness.

  As shown in FIG. 5, by exposing the heating pipe 26 from the snow melting device block 40, the opening of the heater mounting pipe 26 can be exposed, and the electric heater 35 can be easily inserted and removed even after paving.

  The operation of the heat pipe snow melting device of the present invention will be described. As described above, the snow melting unit 20 may be used by being directly buried under the road surface or level crossing surface where the snow melts, but here, the snow melting device blocks 40, 40... The case will be described.

  The snow melting blocks 40, 40 are spread on the road surface or level crossing surface where it is necessary to melt the snow. When the electric heaters 35 and 35 of the snow melting units 20 and 20 embedded in the snow melting device blocks 40 and 40 spread are energized from the power source 36 through the electric wires 37, the electric heaters 35 and 35 generate heat, and nearby The working fluids 33 and 33 are heated. The heated working fluids 3 and 33 evaporate and move in vapor. The insides of the heating pipes 26, 26 and the heat pipes 21, 22, 23, 24 are evacuated. Accordingly, even if the working fluid 33, 33 is heated by only one heater 35 at the end and evaporated, the resistance is small, so that the working fluid 33 moves quickly and uniformly and passes through the heating pipes 26, 26. , 24 is raised, and the heat pipes 21, 22, 23, 24 are heated.

  Heating the heat pipes 21, 22, 23, 24 heats the surrounding snow melting device blocks 40, 40, thereby melting the snow falling on the snow melting device blocks 40, 40. The working fluid 33 that has heated the heat pipes 21, 22, 23, and 24 is cooled and condensed, descends the heat pipes 21, 22, 23, and 24, is collected near the electric heater 35, and is heated again. Such an operation is repeated to perform snow melting work.

  FIG. 6 is a model view showing an example in which a large number of heat pipe type snow melting devices of the present invention are embedded when the road surface or level crossing surface to melt snow is wide. The snow melting device blocks 40A, 40B, 40C,... Are arranged in the vertical and horizontal directions necessary for the width and length of the road surface or level crossing surface that melts snow.

  As shown in FIG. 7, a plurality of electric heaters 35A, 35B, 35C of the snow melting units 20A, 20B, 20C... Embedded in the snow melting device blocks 40A, 40B, 40C are connected in parallel, and are blocked from the power source 36. Electric power is supplied via the electric wires 37A, 37B, and 37C every time. Even if there are many heat pipes 21A, 22A, 23A ... in the snow melting units 20A, 20B, 20C ..., there are one or two electric heaters 35A, 35B, 35C, so the wiring 37A, 37B, 37C Becomes easy.

  The power source 36 has a built-in control device that detects the amount of snow melt, temperature, time, etc., and controls the energization time to the electric heaters 35A, 35B, 35C to save power.

  FIG. 8 is an enlarged cross-sectional view of the heater unit when a large number of snow melting device blocks 40A, 40B, 40C. If the heating pipes 26A, 26B, 26C... Of the snow melting units 20A, 20B, 20C... Are exposed from the snow melting blocks 40A, 40B, 40C. The electric heaters 35A, 35B, 35C,... Can be attached and detached from the openings of the heating tubes 27A, 27B, 27C,. However, for example, when the electric heater 35B is taken out from the opening of the heater attachment tube 27B of the snow melting unit 20B embedded in the snow melting device block 40B, the heater attachment tube 27A of the adjacent heater unit 20A is obstructed, and the electric heater 35B becomes the heater attachment tube. There is a risk that it cannot be exchanged without being withdrawn from 27B.

  However, in the present invention, the lower sides of the outermost heat pipes 21B and 24A are inclined outward and are positioned outward from the ends of the heater mounting tubes 27A and 27B. Therefore, in order to heat the road surface uniformly, even if the heat pipe 21B of the snow melting unit 20B and the heat pipe 24A of the adjacent snow melting unit 20A are arranged at equal intervals, the distance between the heater mounting pipe 27B and the heater mounting pipe 27A is set to the electric heater. The electric heater 35B can be taken out and replaced without hitting the heater attachment tube 27A of the adjacent snow melting unit 20A.

  Incidentally, while the interval between the heat pipes is 150 mm to 200 mm, the length of the electric heater is about 200 mm.

  In the above description, it has been described that the heater pipes 21, 22, 23, and 24 are embedded in the snow melting device block 40. However, the heater pipes 21, 22, 23, and 24 of the snow melting units 20 and 20 are paved on the road surface or the like. It arrange | positions on the prepared asphalt, and the heat pipe 21, 22, 23, 24 ... arrange | positioned may be buried with the coarse density ascon 43, and a road etc. may be installed directly.

It is sectional drawing of the snow melting unit used for the heat pipe type snow melting apparatus of this invention. It is a cross-sectional view which shows the Example of the heat pipe type snow melting apparatus of this invention. It is a top view which shows the Example of the heat pipe type snow melting apparatus of this invention. It is a longitudinal cross-sectional view which shows the Example which a part of heat pipe type snow melting apparatus of this invention abbreviate | omitted. It is sectional drawing which shows the other Example of the heat pipe type snow melting apparatus of this invention. It is a top view which shows the usage example of the heat pipe type snow melting apparatus of this invention. It is a wiring diagram in the usage example of the heat pipe type snow melting apparatus of this invention of FIG. It is a fragmentary sectional view which shows the usage example of the heat pipe type snow melting apparatus of this invention. It is a slope view of the conventional heat pipe type snow melting apparatus. It is sectional drawing of the conventional heat pipe type snow melting apparatus. It is a partial side view of the conventional heat pipe type snow melting apparatus. It is a model figure which shows the usage example of the conventional heat pipe type snow melting apparatus. It is sectional drawing of the heat pipe used for the conventional heat pipe type snow melting apparatus. It is a fragmentary sectional view of the conventional heat pipe type snow melting apparatus. It is a top view which shows the usage example of the conventional heat pipe type snow melting apparatus.

Explanation of symbols

20 Snow Melting Unit 21 Heat Pipe 22 Heat Pipe 23 Heat Pipe 24 Heat Pipe 26 Heat Pipe 26 Heat Pipe 27 Heater Mounting Pipe 33 Working Fluid 35 Electric Heater 36 Power Supply 37 Wiring 40 Snow Melting Device

Claims (5)

A plurality of heat pipes sealed with a working fluid that is vacuum-sealed and vaporized at a low temperature;
A heating pipe having a larger diameter than the heat pipe, one end communicating with each other and each heat pipe communicating with each other;
A heater mounting pipe provided at an end of the heating pipe;
It comprises a snow melting unit provided with an electric heater that is inserted through an opening located in a direction orthogonal to the heat pipe of the heater mounting pipe and that heats the working fluid,
A heat pipe type snow melting device characterized in that the working fluid heated by the electric heater efficiently moves the vapor by vacuum sealing and quickly transfers the heated heat to the plurality of heat pipes. A plurality of heat pipes sealed with a working fluid that is vacuum-sealed and vaporized at a low temperature;
A heating pipe having a larger diameter than the heat pipe, one end communicating with each other and each heat pipe communicating with each other;
A heater mounting pipe provided at an end of the heating pipe;
It comprises a snow melting unit provided with an electric heater that is inserted through an opening located in a direction orthogonal to the heat pipe of the heater mounting pipe and that heats the working fluid,
The vicinity of the heat pipe attachment portion provided at both ends of the heating pipe is inclined outward, the tip of the heat pipe is positioned outward from the end of the heating pipe, and the heat pipe is adjacent. A heat pipe type snow melting device characterized in that, when installed, the electric heater can be taken out without being disturbed by a heating pipe of an adjacent snow melting unit.   3. A heat pipe type snow melting apparatus according to claim 2, wherein the electric heater is provided in a heater mounting pipe at both ends of the heating pipe. The heat pipe is embedded in a snow melting device constituting a road surface or a level crossing,
3. The heat pipe type snow melting device according to claim 2, wherein at least an opening of a heater mounting pipe provided with the electric heater is exposed from the snow melting device. A plurality of snow melting devices are provided according to the area of the road surface or level crossing where snow melting is required,
3. The heat pipe type snow melting device according to claim 2, wherein one or two electric heaters provided in the snow melting unit of each snow melting device are divided into blocks, and each block is wired to a power source.

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