JP3206700U - Snow melting equipment - Google Patents

Abstract

A snow melting device using a heat pipe, which is relatively easy to transport and install equipment. A heat pipe has an evaporation section 22 that absorbs underground heat and a condensation section 21 that dissipates heat near the ground. The condensing part 21 is supported on the installation reference plane S by the long member 25 and the support leg 26. The long member 25 extends along the installation reference plane S and supports the condensing unit 21. The support leg 26 supports the long member 25 so that the condensing part 21 is separated from the installation reference plane S. [Selection] Figure 2

Description

  The present invention relates to a snow melting device using a heat pipe.

  In the apparatus described in Patent Document 1, which is a snow melting apparatus using a heat pipe, a heat pipe condensing part is installed on a panel body installed on the ground surface.

JP 2008-88652 A

  The panel body used in Patent Document 1 spreads in a plane over the range in which the condensing portion extends. Therefore, the panel body is bulky, which may cause difficulty in transporting equipment and installing heat pipes.

  An object of the present invention is to provide a snow melting device using a heat pipe that is relatively easy to transport and install equipment.

  The snow melting device of the present invention includes a heat pipe having an evaporation portion that absorbs heat in the ground and a condensation portion that dissipates heat in the vicinity of the ground, and a condensation portion support means that supports the condensation portion. And a plurality of long members that support the condensing unit and a support leg that supports the long member so that the condensing unit is spaced apart from the installation reference surface. It has.

  According to the snow melting device of the present invention, a long member that is a member that is less bulky than the panel body and a support leg that supports the member are used as the heat pipe condensing unit supporting means. Therefore, transportation and installation of equipment is relatively easy.

  Further, in the present invention, the heat extracted from the heat dissipating part, the underground heat exchanging part, and the underground heat exchanging part installed in the vicinity of the condensing part is supplied to the heat dissipating part via a heat medium. It is preferable to further include a heat pump. According to this, a heat pump is attached to the heat pipe. For this reason, for example, by operating the heat pump in a situation where it is difficult to secure the snow melting capability with only the heat pipe, the heat pump can complement the snow melting capability of the heat pipe.

  Further, in the present invention, a plurality of the heat pipes may be provided, and the heat radiating unit may surround the entire condensing unit in the plurality of heat pipes in a plan view. According to this, since the heat radiating part surrounds the condensing part of the heat pipe, the heat from the heat radiating part is transmitted to the condensing part, and this heat is further transmitted to the periphery of the condensing part through the condensing part. Thereby, not only the periphery of the heat radiating portion but also the periphery of the condensing portion can be affected by the heat from the heat radiating portion.

  Further, in the present invention, it is provided with a plurality of heat pipe units having one or a plurality of the heat pipes in which the evaporation section is inserted into one vertical hole formed in the ground, and the heat dissipation section, The heat pipe unit may extend so as to surround at least three sides in plan view. According to this, the heat radiating portion extends so as to surround each heat pipe unit from at least three sides. For this reason, a heat radiating part tends to give the influence of heat radiation to each heat pipe unit.

  Further, in the present invention, the heat radiating section includes another heat pipe different from the heat pipe, and a through pipe penetrating a lower portion of the other heat pipe along a direction in which the other heat pipe extends. The heat medium heated in the heat pump may be configured to pass through the through pipe. According to this, it is possible to dissipate heat in a wide range from the outer surface of the heat pipe having a large diameter by circulating the heat medium through the through pipe having a small diameter.

It is a conceptual diagram which shows the structure of the snow melting apparatus which concerns on one Embodiment of this invention. Except for the range surrounded by the alternate long and short dash line, this corresponds to the diagram showing the planar configuration of the snow melting device. The range surrounded by the alternate long and short dash line corresponds to a side view of the configuration of the portion buried in the ground. It is a side view of a heat pipe. It is a top view of a heat pipe unit. It is a block diagram which shows the structure of a heat pump. It is a key map showing the plane composition of the modification of a heat pump unit. FIG. 6A is a perspective view of another modification of the heat pump unit. FIG. 6B is a cross-sectional view taken along line BB in FIG.

  Hereinafter, a snow melting device 1 according to an embodiment of the present invention will be described with reference to FIGS. The snow melting apparatus 1 is provided with six heat pipe units 2 and a heat pump unit 3 attached thereto. As shown in FIG. 1, the six heat pipe units 2 are arranged in a row so that their longitudinal directions are parallel to each other in plan view. In FIG. 1, a group composed of the three heat pipe units 2 on the left side is referred to as a unit group 2a, and a group composed of the three heat pipe units 2 on the right side is referred to as a unit group 2b. The unit group 2a and the unit group 2b are adjacent to each other across the gap 2c.

  As shown in FIG. 2, the heat pipe unit 2 is embedded in the ground consisting of three layers of a gravel layer G1, a protective concrete layer G2, and an asphalt layer G3. The protective concrete layer G2 is formed on the gravel layer G1, and the asphalt layer G3 is formed on the protective concrete layer G2. The upper surface of the gravel layer G1 is set as an installation reference plane S. In the present embodiment, it is assumed that the installation reference plane S is horizontal, but the installation reference plane S may be inclined.

  Each heat pipe unit 2 has three heat pipes 20 as shown in FIGS. 1 and 3. The heat pipe 20 includes a metal tube, a working fluid sealed in the tube, and a wick provided on the inner wall surface of the tube. The tube is sealed and the interior is maintained in a vacuum. As shown in FIG. 2, the heat pipe 20 includes a condensing unit 21 disposed in the vicinity of the ground surface, an evaporating unit 22 buried deep in the ground, and an intermediate unit 23 between the condensing unit 21 and the evaporating unit 22. Contains. The condensing part 21 extends linearly along the installation reference plane S in the protective concrete layer G2.

  On the installation reference plane S, a plurality of long members 25 arranged in a straight line so as to intersect the condensing portion 21 and a plurality of support legs 26 for supporting the long members 25 on the installation reference plane S. And are provided. The plurality of long members 25 are arranged side by side so as to be parallel to each other with a predetermined interval therebetween. Each long member 25 is provided with a plurality of support legs 26. These support legs 26 are arranged along the long member 25 with an appropriate interval between each other. Each condensing part 21 is supported by these long members 25 so as to straddle a plurality of long members 25. The condensing part 21 and the elongate member 25 may be bound, for example by the metal binding wire. As shown in FIG. 2, the long member 25 is disposed so as to be separated from the reference ground plane S by the support legs 26. Thereby, the condensing part 21 fixed to the elongate member 25 is also arrange | positioned in the position spaced apart from the reference | standard grounding surface S upwards. The condensing part 21 inclines so that it may go diagonally downward from the front-end | tip (left end in FIG. 2) to the intermediate part 23. FIG. The evaporation unit 22 is directed vertically downward in the gravel layer G1 from the intermediate unit 23. The intermediate part 23 is curved from the rear end (right end in FIG. 2) of the condensing part 21 toward the upper end of the evaporation part 22. The evaporation part 22 is installed in the vertical hole h1 formed in the gravel layer G1 over a depth of about 20 m from the ground. In the vertical hole h1, the periphery of the evaporation part 22 is filled with silica sand.

  In the winter season when the temperature deep underground is higher than the temperature near the ground surface, the heat pipe 20 conducts the underground heat near the ground surface as follows. The working fluid in the evaporation unit 22 evaporates by absorbing heat deep in the ground. The evaporated working fluid rises and travels toward the condensing unit 21 through the intermediate unit 23. The hydraulic fluid that has risen up to the condensing unit 21 dissipates heat in the condensing unit 21 and condenses and returns to the liquid. The condensing part 21 is inclined obliquely downward toward the intermediate part 23. Therefore, the hydraulic fluid that has returned to the liquid in the condensing unit 21 travels along the wick to the intermediate unit 23 due to gravity, and returns to the evaporation unit 22 through the intermediate unit 23. The circulation of the working fluid in the heat pipe 20 evaporates, moves, and condenses, so that heat in the ground is conducted near the ground surface. Thereby, the snow accumulation around the condensing part 21 can be melted.

  As shown in FIG. 1, the heat pump unit 3 includes a heat pump 31, a ground heat exchanger 32 (a ground heat exchanging portion), and circulation pipes 35 and 36 (a heat radiating portion). The heat pump 31 and the underground heat exchanger 32 are connected by a pipe 38 through two headers 37. Further, the heat pump 31 and the circulation pipes 35 and 36 are connected by a pipe 39 through two headers 37. A heat medium (water, antifreeze, etc.) is sealed in these pipes. The underground heat exchanger 32 includes a pipe 321 disposed in a vertical hole h2 formed deep underground (a depth of about 100 m from the ground). The heat medium from the heat pump 31 is passed through the pipe 321 through the header 37 and the pipe 38. The heat medium in the pipe 321 absorbs underground heat in the vertical hole h2. The heat medium that has absorbed the underground heat returns to the heat pump 31 through the head 37 and the pipe 38.

  As shown in FIG. 4, the heat pump 31 includes heat exchangers 311 and 312, an expansion valve 313, and a compressor 314. These devices are connected to each other by a pipe 315 in which a heat medium is sealed. The heat medium circulates between these devices through the pipe 315 counterclockwise in FIG. A pipe 38 is disposed in the heat exchanger 311. The heat medium from the underground heat exchanger 32 passes through the heat exchanger 311 through the pipe 38 and returns to the underground heat exchanger 32. At that time, heat is conducted from the heat medium on the pipe 38 side to the heat medium on the pipe 315 side. The heat medium that has absorbed heat in the heat exchanger 311 goes to the compressor 314 through the pipe 315. This heat medium is compressed in the compressor 314. The compressor 314 operates by receiving power supply from the power source 4. The power supply from the power supply 4 to the compressor 314 can be switched on / off by a switch 316. The heat medium compressed in the compressor 314 goes to the heat exchanger 312 through the pipe 315. A pipe 39 is disposed in the heat exchanger 312. The heat medium from the circulation pipes 35 and 36 passes through the heat exchanger 312 through the pipe 39. At that time, heat is conducted from the heat medium on the pipe 315 side to the heat medium on the pipe 39 side. The heat medium radiated in the heat exchanger 312 expands in the expansion valve 313. The expanded heat medium goes to the heat exchanger 312. On the other hand, the heat medium that has absorbed heat in the heat exchanger 312 goes to the circulation pipes 35 and 36 through the pipe 39 and the header 37. The heat pump 31 supplies the heat collected in the underground heat exchanger 32 to the heat medium in the circulation pipes 35 and 36 through the circulation process of the heat medium as described above through the pipe 315.

  The circulation pipes 35 and 36 are embedded in the concrete protective layer G2 shown in FIG. As shown in FIG. 1, each of the circulation pipes 35 and 36 surrounds the six heat pipe units 2 with a double path including a forward path and a return path in plan view. The forward path starts from the second header 37 from the left in FIG. 1 and extends clockwise around the vicinity of the heat pipe unit 2. 1 enters the gap 2c between the unit group 2a and the unit group 2b from below in FIG. 1, and is connected to the return path at the upper part in FIG. 1 of the gap 2c. The return path turns back from the upper part of the gap 2c in FIG. 1 and goes out of the gap 2c. Then, the periphery of the heat pipe unit 2 is surrounded counterclockwise outside the forward path, and is connected to the first header 37 from the left in FIG. The heat medium from the heat pump 31 flows through the circulation pipes 35 and 36 in the order of the second header 37 from the left in FIG. 1, the forward path, the return path, and the first header 37 from the left in FIG. 1, and returns to the heat pump 31. . Thereby, the snow accumulation around the circulation pipes 35 and 36 can be melted.

  According to the present embodiment described above, the long member 25 and the support leg 26 are used as means for supporting the condensing part 21 of the heat pipe 20. Since the long member 25 is an elongated member, it is easy to bundle a plurality of members. The support legs 26 are also small members. Therefore, any member is not bulky. For this reason, transportation and installation of equipment are relatively easy.

  In the present embodiment, the heat pump unit 3 is also provided in the heat pipe unit 2. The switch 316 is turned on and the heat pump unit 3 is stopped during a period in which the ability to melt snow can be secured with only the heat pipe 20. On the other hand, the snow melting ability of the heat pipe 20 can be complemented by turning on the switch 316 and operating the heat pump unit 3 in the cold season or the like when it is difficult to sufficiently secure the snow melting ability with the heat pipe 20 alone.

  In the present embodiment, the circulation pipes 35 and 36 of the heat pump unit 3 entirely surround the condensing portions 21 of the six heat pipe units 2. For this reason, the heat from the circulation pipes 35 and 36 is transmitted to the condensing unit 21, and this heat is further transmitted through the condensing unit 21. As a result, not only the periphery of the circulation pipes 35 and 36 but also the periphery of the condensing part 21 can be affected by the heat from the circulation pipes 35 and 36.

  For example, in an environment where the heat pump unit 3 is kept on and used continuously, the ability to melt snow on the snow around the condensing unit 21 is continuously ensured by heat radiation from the circulation pipes 35 and 36. For this reason, in the heat pipe 20, since the necessity to insert the evaporation part 22 to 20 m deeply becomes low, you may only insert shallower than 20 m. Alternatively, the evaporation section 22 may not be provided in the ground, and the entire heat pipe may be a portion along the vicinity of the ground.

  Hereinafter, modifications of the heat pump unit 3 in the above-described embodiment will be described. The circulation pipe 135 according to the first modification is provided in place of the circulation pipes 35 and 36. As shown in FIG. 5, the circulation pipe 135 extends so as to sew between the heat pipe units 2. Thereby, each heat pipe unit 2 is surrounded by the circulation pipe 135 from three directions in plan view. The heat medium heated by the heat pump 31 flows through the circulation pipe 135. According to this modification, each heat pipe unit 2 is surrounded by the circulation pipe 135, so that it is easily affected by heat radiation from the circulation pipe 135.

  The heat pipe 137 according to the second modification is used in combination with the circulation pipes 35 and 36. The heat pipe 137 includes a metal tube and a working fluid sealed in the tube. As shown in FIGS. 6A and 6B, the tube is sealed with the circulation pipe 35 inserted in the lower portion, and the inside is maintained in a vacuum. The working fluid in a liquid state is in contact with the circulation pipe 35 below the heat pipe 137. When the heated heat medium is passed through the circulation pipe 35, the working fluid that has absorbed heat from the circulation pipe 35 evaporates. The evaporated working fluid dissipates heat on the inner surface of the heat pipe 137 and condenses. The condensed hydraulic fluid returns to the lower part of the heat pipe 137. By using the heat pipe 137 in combination with the circulation pipe 35 in this way, the heat medium can be circulated through the circulation pipe 35 having a small diameter, so that heat can be dissipated over a wide range from the outer surface of the heat pipe 137 having a large diameter.

<Other variations>
The above is a description of a preferred embodiment of the present invention, but the present invention is not limited to the above-described embodiment, and various modifications are possible within the scope described in the means for solving the problem. It is possible.

  For example, in the above-described embodiment, one heat pipe unit 2 includes three heat pipes 20. And the evaporation part 22 of these three heat pipes 20 is inserted in one vertical hole h1. However, one heat pipe unit 2 may include one to two, or four or more heat pipes 20. The number of heat pipes 20 inserted into one vertical hole h1 may be 1 to 2, or 4 or more.

  Moreover, what is called a closed type heat pump which distribute | circulates a thermal medium in the piping path | route closed in the underground heat exchanger 32 is employ | adopted for the heat pump unit 3 of the above-mentioned embodiment. However, a so-called open-type heat pump that collects heat from the groundwater pumped from the groundwater vein and returns the groundwater after collection to the groundwater vein may be employed in the underground heat exchange section of the present invention.

  In the above-described embodiment, whether or not the heat pump unit 3 complements the snow melting ability of the heat pipe unit 2 is switched by turning on / off the switch 316. However, instead of or in addition to the switch 316, a switch that changes the heat exchange capability of the heat pump unit 3 in a plurality of stages may be provided. According to this, the snow melting ability of the heat pump unit 3 can be adjusted according to the snow melting ability of the heat pipe unit 2.

DESCRIPTION OF SYMBOLS 1 Snow melting apparatus 2 Heat pipe unit 3 Heat pump unit 20 Heat pipe 21 Condensing part 22 Evaporating part 25 Long member 26 Support leg 31 Heat pump 32 Underground heat exchanger 35 Circulation pipe 36 Circulation pipe 135 Circulation pipe 137 Heat pipe

Claims (5)

A heat pipe having an evaporating part that absorbs heat in the ground and a condensing part that radiates heat near the ground;
A condensing part supporting means for supporting the condensing part,
The condensing part support means is
A plurality of elongate members extending along the installation reference plane and supporting the condensing part;
A snow melting device comprising: a support leg that supports the elongate member so that the condensing part is separated from the installation reference plane. A heat dissipating part installed in the vicinity of the condensing part;
An underground heat exchange section;
The snow melting device according to claim 1, further comprising a heat pump that supplies heat collected from the underground heat exchange unit to the heat radiating unit via a heat medium. A plurality of the heat pipes are provided,
The snow melting device according to claim 2, wherein the heat radiating portion surrounds the entire condensing portion of the plurality of heat pipes in a plan view. A plurality of heat pipe units having one or a plurality of the heat pipes in which the evaporation section is inserted into one vertical hole formed in the ground,
The snow melting apparatus according to claim 2, wherein the heat radiating portion extends so as to surround the heat pipe unit from at least three sides in a plan view.   The heat radiating portion includes another heat pipe different from the heat pipe and a through pipe penetrating a lower portion of the other heat pipe along a direction in which the other heat pipe extends, and is heated in the heat pump. The snow melting apparatus according to claim 2, wherein the heat medium passes through the through pipe.

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