JP2008025334A - Snow melting device combining effect of heat conduction and half heat insulation - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve a problem of causing snow melting unevenness due to poor energy efficiency in a conventional metal roof snow melting method wherein a snow melting heat source is laid directly under a sheet metal to quickly melt snow coverage near the snow melting heat source, but much heat energy is dissipated and lost into the cold atmosphere from this part. <P>SOLUTION: An efficient snow melting method is provided combining the effect of transferring heat energy widely by providing the snow melting heat source with a metal plate of high heat conduction, and the effect of suppressing dissipation of heat energy into the cold atmosphere by sticking a half heat insulating material to a part between the snow melting heat source and the sheet metal of a snow melting surface. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  This invention relates to the technology of snow melting equipment for structures such as metal roofs, building headboards and bridges.

A conventional snow melting device such as a metal roof and a headboard portion of a building employs a method of directly laying a heat source for melting snow under a sheet metal to be melted, or a method of supplying a heat source for melting snow to an exposed pipe. Although these methods can quickly melt snow on the snow melting surface near the heat source, heat energy is dissipated and lost from the melted snow near the heat source to the cold atmosphere, so it is far from the heat source. The snow melt unevenness that remains without melting the snow on the snow melting surface is generated and the efficiency is not good. (For example, see Patent Document 1)
FIG. 1 is a cross-sectional view showing a conventional snow melting apparatus for a metal roof as an example.
On the base plate 6, the base heat insulating material 5 provided with a recess for accommodating the snow melting heat source 1 is laid so as to be directly attached to the snow melting heat source 1 and the sheet metal 4. When a heat source such as a heating wire or hot water is passed, the snow on the snow melting surface 7 near the heat source melts immediately.
However, a large amount of heat energy is dissipated from the snow melting surface 7 near the heat source where the snow melted to the cold atmosphere, and the snow melting unevenness that remains without melting the snow 15 occurs on the snow melting surface 8 away from the heat source 1 for snow melting. ing.

Patent Publication 2002-356959, Patent Publication 2003-82882,

  In conventional snow melting equipment such as metal roofs and building caps, when the snow on the snow melting surface melts, the temperature near the heat source for melting snow is the highest, so much heat energy is dissipated from the snow melting surface to the cold atmosphere. The heat energy is lost, and this heat energy loss is suppressed, and the heat energy is widely transferred to efficiently melt the snow.

  In order to achieve the above-mentioned goal, the present invention attaches a metal plate such as aluminum having good thermal conductivity to the heat source for melting snow to transfer heat energy widely, and is thin in a part between the heat source for melting snow and the sheet metal on the snow melting surface. The present invention provides a snow melting device that uses heat insulating material as a semi-insulating material to prevent heat energy from being dissipated and lost in a cold atmosphere.

  With the same amount of heat energy, it was possible to melt snow more than 160% wider than the conventional method.

Next, an embodiment of the present invention will be described.

FIG. 2 is a cross-sectional view of a snow melting method using both heat conduction and a semi-insulating effect.
The snow melting device by this heat conduction and semi-insulating effect can be applied to a portion of a metal roof and a building such as a headboard portion of a building or a snow landing on a structure such as a bridge.
In FIG. 2, a metal roof snow melting device will be described as an example.
A base heat insulating material 5 is provided on the base plate 6, and a recess 9 is provided in the base heat insulating material 5. In addition, a snow melting heat source 1 and a metal plate 2 with good heat conduction are laid in this recess 9 and a semi-insulating material 3 cut to a certain width is attached to the metal plate 2 with good heat conduction near the heat source for snow melting. Install under the sheet metal 4.

Next, the operation of the snow melting device will be described.
When a heat source such as a heating wire or hot water is passed through the heat source 1 for melting snow, a part of the heat energy penetrates the semi-insulating material 3 and heats the snow melting surface 7 near the heat source of the sheet metal 4 to melt the snow of this part. ,
However, although the snow on the snow melting surface 7 close to the heat source melts, the semi-insulating material 3 exists between the snow melting heat source 1 and the sheet metal 4, so that the heat energy of the snow melting heat source 1 is dissipated and lost to the cold atmosphere. Can be suppressed.
For this reason, the other heat energy can be transferred from the snow melting heat source 1 to the metal plate 2 having good thermal conductivity, and the snow melting surface 8 away from the heat source of the sheet metal 4 can be heated to melt the snow at this portion.
Thus, by providing the semi-insulating material 3 between the snow melting heat source 1 and the sheet metal 4, the heat energy is prevented from being dissipated into the atmosphere from the snow melting surface 7 close to the snow melting heat source, and the metal has good heat conduction. The heat transfer effect of the plate 2 is a device that transfers heat energy widely and efficiently melts snow.

FIG. 9 is a temperature distribution graph of the snow melting surface.
The temperature distribution graph 19 of the snow melting surface by the conventional snow melting method and the temperature distribution graph 22 of the snow melting surface according to the present invention are shown.
The horizontal axis 17 of the graph represents the distance of the snow melting surface that is separated from the point 16 of the heat source for melting snow to the left and right, and the vertical axis 18 of the graph indicates the temperature rise at each point of the snow melting surface of the sheet metal 4.
As shown in this temperature distribution graph, the temperature distribution 19 of the conventional snow melting method shows a high temperature 20 at the point of the snow melting heat source, but the temperature 21 at a point separated from the point 16 of the heat source suddenly decreases. .
In comparison with this, in the snow melting device according to the present invention using both heat conduction and a semi-insulating effect, the temperature 23 at the point of the heat source for melting snow shows a low temperature due to the effect of the semi-insulating material 3, and the heat energy of the heat source is cooled. To prevent loss to the atmosphere.
On the other hand, the temperature 24 at the point separated from the heat source can be maintained at a high temperature by the heat conduction effect of the metal plate 2 having good heat conduction, which indicates that snow can be melted widely.

  As a result of the snow melting test using the same heat energy based on this data, the snow melting method according to the present invention has a snow melting capacity of about 160% or more compared to the conventional method of laying a snow melting heat source directly on the sheet metal 4. Could get.

FIG. 3 is a perspective view of the heat conductive plate 10 with a semi-insulating material.
FIG. 4 is a cross-sectional view AA of the heat conductive plate 10 with a semi-insulating material.
A recess was provided in the metal plate 2 with good heat conductivity cut to a predetermined length of a certain width, and the heat source pipe 11 was attached thereto, and the semi-insulating material 3 was pasted into the recess of the metal plate 2 with good heat conductivity. Of structure.

FIG. 5 is a perspective view of the heat conductive plate 10 with a semi-insulating material and the sheet metal 4.
The operation of the heat conductive plate 10 with a semi-insulating material and the sheet metal 4 in FIG. 5 will be described.
When a heat source such as a heating wire or hot water is passed through the heat source pipe 11, a part of the heat energy melts through the semi-insulating material 3 and melts snow on the snow melting surface 7 close to the heat source of the sheet metal 4, and the other heat energy Passes through the metal plate 2 having good heat conduction from the pipe 11 through which the heat source passes, transfers heat to the sheet metal 4 and melts snow on the snow melting surface 8 away from the heat source.
In this case, even if the snow melt on the snow melting surface 7 close to the heat source melts, the other heat energy is used as the heat source in order to suppress the heat energy from being dissipated and lost to the cold atmosphere due to the semi-insulating effect of the semi-insulating material 3. It is possible to melt snow on the snow melting surface 8 away from the snow.

FIG. 6 is a construction cross-sectional view of a snow melting method for a vertical metal roof.
A base heat insulating material 5 is laid on a base plate 6 of a metal roof, and a heat conductive plate 10 with a semi-heat insulating material is installed. The metal roof sheet metal 4 is stretched over this. In this snow melting device, a recess 9 is provided in a part of the base heat insulating material 5 and a heat conductive plate 10 with a semi-heat insulating material is laid.

FIG. 7 is a cross-sectional view of the construction of the snow melting device for the horizontal metal roof 13.
A base heat insulating material 5 is laid on a base plate 6 of a metal roof, a recess 9 is provided in a part of the base heat insulating material 5, and a heat conductive plate 10 with a semi heat insulating material is installed. This is a snow melting device in which a sheet metal 4 of a metal roof is stretched thereon.

FIG. 8 is a cross-sectional view of the construction of the snow melting device in the head section of a building or the like.
A base heat insulating material 5 is laid on the base plate 6 of the headboard portion, a recess is provided in a part of the base heat insulating material 5, and a heat conductive plate 10 with a semi-heat insulating material is installed in this portion. This is a snow melting device in which the sheet metal 4 of the head portion is laid.

Sectional view of a conventional metal roof snow melting device Cross section of a snow melting device that combines heat conduction and semi-insulating effect Perspective view of heat conduction plate with semi-insulating material Cross section of heat conduction plate with semi-insulating material Perspective view of heat conduction plate with semi-insulating material and sheet metal Cross section of snow melting equipment for vertical metal roof Cross-sectional view of snow melting equipment on a horizontal metal roof Cross section of the snow melting device at the headboard Temperature distribution graph

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Heat source for snow melting 2 Metal plate with good heat conduction 3 Semi-insulating material 4 Sheet metal 5 Underlying heat insulating material 6 Underlying plate 7 Snow melting surface near heat source 8 Snow melting surface away from heat source 9 Recessed portion 10 Heat conducting plate with semi-insulating material 11 Heat source Pipe 12 Longitudinal metal roof 13 Horizontal metal roof 14 Sheet metal for coping 15 Snow accumulation 16 Point of heat source for snow melting 17 Graph horizontal axis 18 Graph vertical axis 19 Temperature distribution of conventional snow melting device 20 Temperature of heat source point of conventional device 21 Heat source The temperature at the point separated from the temperature 22 The temperature distribution of the snow melting device of the present invention 23 The temperature at the point of the heat source of the present invention 24 The temperature of the point separated from the heat source

Claims (4)

  A metal plate with good heat conduction is attached to the heat source for melting snow, and the heat energy is widely transferred, and a semi-insulating material is provided between the heat source for melting snow and the snow melting surface to dissipate the heat energy to the cold atmosphere. Snow melting device that combines the effects of preventing snow.   A heat conduction plate with a semi-insulating material, in which a metal plate with good heat conductivity is attached to a snowmelt heat source pipe, and a semi-insulating material is attached to a part of the metal plate.   3. A snow melting apparatus for a metal roof using a heat conductive plate with a semi-insulating material according to claim 2, wherein a metal plate having good heat conduction is attached to the heat source pipe for melting snow and a semi-insulating material is adhered between the metal plate and the snow melting surface.   The building headboard using the snow-melting heat conduction plate according to claim 2, wherein a metal plate with good thermal conductivity is attached to the pipe of the heat-melting heat source, and a semi-insulating material is attached to a part between the metal plate and the snow-melting surface. Partial snow melting device.

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