JPH0262675B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a snow melting device in which a conduit through which a heat medium circulates is constructed under a roofing material such as tiles or galvanized iron.

(Conventional technology) In areas with heavy snowfall, if snow accumulation on roofs is not removed promptly, it may lead to disasters such as collapse of houses.

Therefore, various snow melting devices that do not require human labor have been put into practical use as means for removing accumulated snow on roofs.

For example, in this type of snow melting device, a pipe for circulating hot water or hot air is installed inside a block, or it is constructed in the form of a pine and placed on the top of the roof.

A sheet made of electric heating means such as a carbon sheet heating element is laid on the roof.

This uses a heat pipe and attaches it to the roof.

etc. are known.

(Problems to be Solved by the Invention) However, all of the snow melting devices described above have the following problems.

First, the heat generating means is newly installed on the roof top surface, and since they are arranged densely to a certain extent, the equipment becomes large-scale, leading to an increase in cost and construction costs.

Secondly, since it directly heats and melts the snow under the snow, the discharge of snow melt water is very poor, and since it only heats the snow, it is not efficient and the snow melting performance is not sufficient.

Thirdly, although the appearance of a house is an important factor, the appearance of the house is significantly impaired by the installation of various equipment on the roof.

(Means for solving the problems) This invention eliminates the above problems,
Its feature is that it is a snow melting device that melts snow on the roof by circulating heat medium heated by a heater through pipes appropriately installed on the roof. A recessed groove in which protrusions are formed at appropriate intervals on the inner wall is provided on the upper surface of the heat insulating material, and the protrusion is fitted into the recessed groove so that the conduit is connected to the inner wall of the recessed groove with a gap therebetween. The opening surface of the groove is covered with a heat sink, the heat sink is brought into contact with the pipe, and the top is covered with a roofing material such as tiles or galvanized iron.

(Function) When the heat medium is circulated within the conduit, the heat of the heat medium is transferred to the roofing material via the heat sink and melts snow. At this time, since the conduit is disposed within the groove of the heat insulating material, heat transfer toward the roof board is blocked, and heat can be efficiently transferred to the roof material. In particular, since the conduit is disposed within the groove with a space between it and the inner wall of the groove due to the protrusion, the heat insulating material itself is not directly heated, resulting in further excellent thermal efficiency.

(Example) Next, a preferred example of the present invention will be described in detail based on the accompanying drawings.

As shown in FIG. 2, the snow melting device of this invention has the following features:
A heating unit 12 is placed in the attic, and the heat medium heated by this heating unit 12 circulates through a pipe 16 appropriately arranged under a roofing material 14 such as tiles or corrugated iron, and returns to the heating unit 12. It is configured as follows.

The heating unit 12 is composed of a heater filled with a heat medium, an electric heater located at the bottom of the heater, and a circulation pump.

As shown in FIG. 3, the conduit 16 meanders across the slope of the roof.

Next, the construction structure of the conduit 16 to the roof will be explained with reference to FIG. 1. A roof board (hereinafter referred to as a roof board 18) constituting a roof is placed over the entire rafter, and a waterproof sheet 20 is further placed so as to cover the entire surface of the roof board 18.

Then, a heat insulating board 30 is laid over the entire surface of the waterproof sheet 20. A concave groove 36 in which the conduit 16 is disposed is carved on the upper surface of the heat insulating plate 30. This groove 3
Projections 38 are provided at appropriate positions on both inner side surfaces 36a and bottom surface 36b of the tube 6, and the conduit 16 is held in the space within the groove 36 without contacting the inner surface of the groove 36 (see FIG. 9). ). Then, the opening of the groove 36 is covered with a heat dissipation plate 22 such as aluminum tape, a part of the heat dissipation plate 22 is brought into contact with the pipe line 16, the entire roof is covered with a waterproof sheet 24, and the tiles 14a or A roofing material 14 such as galvanized iron 14b is constructed in the same manner as before.

Next, the arrangement state of the pipe line 16 to the roof will be explained. Conventionally, the pipe line 16 meandered in the direction of the slope of the roof, but this resulted in the heating medium liquid repeatedly rising and falling, requiring a large circulation pump. Therefore, in order to reduce the number of times the heat medium rises and falls, the heat medium is once raised to the vicinity of the ridge 24a of the roof 24, and then lowered by meandering across the slope of the roof.

For example, FIG. 3 is a plan view of a gable roof, and FIG. 3a shows a meandering state across the entire width of the roof. FIG. 3b shows a state in which one side of the roof is divided into three blocks and pipes 16 are arranged in the same manner as in FIG. 3a. It should be noted that the arrangement state in which the pipe line 16 is divided into blocks as shown in FIG. 3b makes it possible to circulate the high-temperature heat transfer liquid throughout the roof.

Moreover, FIG. 4 shows a hipped roof. In this case, the pipe line 16 is divided into three blocks, the ridge 24b sides of the blocks on both sides meander along the ridge 24b so as to become wide, and the central block is divided into three blocks.
It is arranged as in Figure b.

On the other hand, FIG. 5 shows a state in which the conduit 16 is arranged so that the width of the meandering at the eave part 24A of the roof is narrow (the meandering density is dense) and the meandering width is wide at the upper part of the roof (the meandering density is sparse). . On the other hand, as shown in FIG. 6, since a snow-slip stopper 26 is provided at the eaves portion 24A, snow tends to stay on the eaves portion 24A.
Therefore, in order to melt the snow remaining on the eaves portion 24A, the meandering density of the eaves portion 24A is arranged densely, so that the accumulated snow on the eaves portion 24A can be efficiently melted.

Next, the heat insulating plate 30 will be explained. As shown in FIGS. 3a and 3b and FIG. 4, there are two types of heat insulating plates 30 for arranging the conduit 16. This is a straight panel 32 in which a straight part of the pipe line 16 is arranged, and a curved panel 34 in which a curved part of the pipe line 16 is arranged (see FIGS. 7 and 8). The straight panel 32 is provided with parallel grooves 36 having a U-shaped cross section at equal intervals. As described above, the groove 36 has the groove 36
Projections 38 are provided on both inner surfaces 36a and bottom surface 36b of 6.
(See Figure 9). The protruding position of the protrusion 38 is provided, for example, at a position indicated by a broken line in the drawing.

A short groove 42 is formed in the curved panel 34 in correspondence with the linear portion of the groove 36.
A wide semicircular first bending groove 44A connecting adjacent grooves 42 is formed at the end of the groove 2 . Further, a wide semicircular second bending groove 44B is formed so as to straddle the two first bending grooves 44A. Note that the first and second bending grooves 4 are formed wide.
4A and 44B absorb expansion and contraction of the straight portion of the conduit 16. Furthermore, a linear groove 46 is provided at one end of the curved panel 34 on the side opposite to the groove 42, in a direction crossing the groove 42. Then, a short groove 4
2. Protrusions 38 are provided at appropriate positions in the first and second bending grooves 44A, 44B and the linear groove 46. In addition, the panel on the ridge 24b side of the hipped roof shown in FIG.
The 4B side may be formed to be inclined. By combining the straight panel 32 and the curved panel 34 shown above, the pipe line 16 can be appropriately arranged.

Next, a case will be described in which a heat medium conduit is provided together with a snow-slip prevention device on the roof. The anti-slip device 48 provided across the roof prevents the snow on the roof from sliding down all at once, and the eaves portion 24A provided with the anti-slip device 48,
Snow tends to stay there. Therefore, the anti-slip device 48 and the heat medium conduit 16 were provided together.

For example, in Fig. 10a, a V-shaped anti-slip tool 48A is held in a position slightly raised from the roofing material (corrugated iron 14b), and a pipe is inserted into the space below this V-shaped non-slip tool 48A. Road 16 is located. In FIG. 10b, a pipe material 48B such as a steel pipe is used as a non-slip device, this pipe material 48B is fixed to a roof material (corrugated iron 14b), and a pipe line 16 is inserted into the hollow space of this pipe material 48B.

Furthermore, a midway portion of the heat medium circulation pipe may be disposed within a gutter. In this case, the conduit 16 such as a copper pipe is covered with a covering material 52 such as reinforced polyethylene or silicone tube to appropriately adjust the heat dissipation of the conduit 16, and placed in the gutter 50 (see FIG. (See Figure 11).

In addition, when the tile 14a is used as a roofing material and the conduit 16 is arranged under the tile 14a as described above, since the tile 14a is formed in a corrugated shape, the tile 14a of the adjacent tile 14a does not overlap with the tile 14a. A cavity 54 is formed at the joint portion in the direction of the slope of the roof. Since many cavities 54 are formed parallel to the roof, when the heat medium is circulated in the pipe 16, the air in the roof cavities 54 is warmed, gradually rises to the ridge 24a, and flows out to the outside. This results in wasteful release of heat. Therefore, by providing a filler 56 in the middle of the cavity 54 and dividing the cavity 54 into a plurality of parts, warm air can be prevented from flowing out, and wasteful radiation of heat can be prevented (Fig. 12). reference).

Note that a sensor may be provided on the roof to automatically turn on and off the electric heater of the heater and the circulation pump according to the amount of snowfall. For example, as shown in FIG. 13, an optical sensor 58 consisting of a light emitting section 58A and a light receiving section 58B is provided and connected to the power source of the snow melting device. The light emitting section 58A and the light receiving section 58B are each supported by legs 60 whose heights are adjustable.

Further, the heat medium circulating within the pipe line 16 will be explained. The heat medium is thought to be water, or water mixed with antifreeze for use in cold regions. Furthermore, it is preferable to use a heat medium that can be heated to a high temperature, has a low melting point, and has a small specific heat.
Examples include ethylene glycol, triethylene glycol, and the like. Ethylene glycol has the physical properties of a molecular weight of 62.07, a boiling point of 197.6℃, a melting point of -13.0℃, a specific gravity of 1.1155, and a specific heat of 0.56, and is a colorless, odorless, sweet, slightly viscous, nonvolatile liquid. .

Further, the circulation path 62 including the snow melting device will be explained with reference to FIG. 14.

Reference numeral 64 denotes a snow melting section (corresponding to the roof 24 described above) in which the pipe line 16 is arranged on the roof.

A heater 66 is composed of a casing 66A formed in a heat-insulated state and an electric heater 68 disposed at a lower portion within the casing 66A. The lower part of the heater 66 and the heat medium 70 of the snow melting section 64
The outflow portion 64a is connected to the pipe 72a and the pipe 72b.
A discharge pipe 72c is provided above the heater 66, and a discharge pipe 72c is provided above the heater 66. This discharge pipe 72c is connected to a heating coil 80 provided in the heat storage section 78 via a circulation pump 76, a three-way switching valve 74b, and a pipe 72d.
is connected to. The heating coil 80 is connected to the snow melting section 64 via a three-way switching valve 74c disposed between the pipe 72e and the pipe 72f. In addition, a three-way switching valve 74a and a four-way switching valve 74
c, the four-way switching valve 74c and the three-way switching valve 74b are connected by connecting pipes 72g and 72h, respectively.

Further, the heat storage section 78 is filled with a heat storage medium 82, and is provided with a supply pipe 84a and a discharge pipe 84b, respectively. Note that water is used as the heat storage medium 82 for hot water supply, and water or ethylene glycol or the like is used for heating, depending on the purpose.

The circulation path 62 can be used in the following three ways.

First, it is used as a snow melting device.
In this case, the three-way switching valves 74a, 74b and the four-way switching valve 74c are switched to connect the heater 66 and the snow melting section 64 in series.

Therefore, the heat medium 70 heated by the electric heater 68 of the heater 66 is circulated in the circuit from the connection pipe 72h and the pipe 72f to the snow melting section 64 and back to the heater 66 by the circulation pump 76.
As described above, the snow melting section 64 melts the snow on the roof.

The second case is when the snow melting section 64 is used as a heat storage circuit that collects and stores solar heat during seasons such as summer. In this case, in order to connect the heater 66, the heating coil 80, and the snow melting section 64 (used as a heat collector in this case) in series, the three-way switching valve 74
a, 74b and the four-way switching valve 74c.

Therefore, the heating medium 70 heated by solar heat in the snow melting section 64 is sent to the heater 66 (without electricity to the electric heater 68) by the circulation pump 76, and when the heating medium 70 passes through the heating coil 80, , the heat is stored in the heat storage medium 82 in the heat storage section 78.
The stored heat storage medium 82 is then used as appropriate for hot water supply or the like.

Thirdly, it may be used as a heat exchange circuit. In this case, the three-way switching valves 74a, 74b and the four-way switching valve 74c are switched to connect the heater 66 and the heating coil 80 in series.

Therefore, the heat medium 70 heated by the electric heater 68 of the heater 66 is sent to the heating coil 80, and heat exchange is performed in the heat storage section 78.

As described above, the circulation path 62 has three functions, so it can be used throughout the seasons. In addition, efficient use is possible by combining the three functions.

(Effects of the Invention) In this invention, the conduit for circulating the heat medium is placed under a roofing material such as tiles or galvanized iron, so the appearance is no different from a conventional roof, and the beauty of the house is not impaired.

Since the conduit is fitted into the protrusion provided on the inner wall of the recessed groove, the conduit is placed in the groove without floating up or sagging within the groove.

When the heat medium is circulated through the pipes, the heat from the heat medium is transferred to the roofing material through the heat sink, melting snow.
At this time, since the conduit is disposed within the groove of the heat insulating material, heat transfer toward the roof board is blocked, and heat can be efficiently transferred to the roof material. In particular, since the conduit is disposed within the groove with a space between it and the inner wall of the groove due to the protrusion, the heat insulating material itself is not directly heated, resulting in further excellent thermal efficiency.

Although the present invention has been variously explained above with reference to preferred embodiments, the present invention is not limited to these embodiments, and it goes without saying that many modifications can be made without departing from the spirit of the invention. It is.

[Brief explanation of the drawing]

Figure 1 is an exploded explanatory view showing how the conduit is installed on the roof, Figure 2 is a front view of the house, and Figures 3a, b, 4 and 5 each show the installation status of the conduit. Fig. 6 is a side view of the house, Figs. 7 and 8 are plan views of straight panels and curved panels, and Fig. 9 is a plan view of the house.
The figure is a partial cross-sectional view showing the arrangement of the conduit in the groove,
Figures 10a and b are cross-sectional views showing how the pipes are arranged along the anti-slip device, Figure 11 is a cross-sectional view showing the pipes arranged inside the gutter, and Figure 12 is a partial front view of the tiled roof. , FIG. 13 is a perspective view showing a sensor that detects the amount of snow, and FIG. 14 is an explanatory diagram showing a circulation flow path of the snow melting device. 12... Heating unit, 14... Roofing material, 14
a...Tile, 14b...Tanium, 16...Pipeline, 1
8... Roof plate, 20, 24... Waterproof sheet, 22
... Heat sink, 24 ... Roof, 24a, 24b ...
Building, 24A...Eave part, 26...Slip stopper, 30...Insulation board, 32...Straight panel, 34
...Curved panel, 36...Concave groove, 36a...Inner surface, 36b...Bottom surface, 38...Protrusion, 42...Concave groove, 44A...First bending groove, 44B...Second bending groove , 46... Concave groove, 48, 48A, 48B... Anti-slip tool, 50... Gutter, 52... Covering material, 54
... Cavity part, 56 ... Filling, 58A ... Light emitting part,
58B... Light receiving part, 60... Leg, 62... Circulation flow path, 64... Snow melting part, 64a... Outflow part, 66
... Heater, 66A ... Casing, 68 ... Electric heater, 70 ... Heat medium, 72a, 72b, 7
2d, 72e, 72f...Pipe, 72c...Discharge pipe, 74a, 74b...Three-way switching valve, 74
c...Four-way switching valve, 76...Circulation pump, 78...
...Heat storage unit, 80... Heating coil, 82... Heat storage medium, 84a... Supply pipe, 84b... Discharge pipe.

Claims (1)

[Scope of Claims] 1. A snow melting device that melts snow on a roof by circulating a heat medium heated by a heater through a pipe line appropriately arranged on the roof, comprising: A recessed groove in which protrusions are formed at appropriate intervals on the inner wall is provided on the upper surface of the heat insulating material, and the protrusion is fitted into the recessed groove so that the conduit is connected to the inner wall of the recessed groove with a gap therebetween. A snow melting device characterized in that the opening surface of the groove is covered with a heat radiating plate, the heat radiating plate is brought into contact with the pipe, and the top thereof is further covered with a roofing material such as a tile or galvanized iron.