JPS6217252A - Snow melting apparatus - 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 (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.

(Prior Art) In regions with heavy snowfall, if snow accumulation on roofs is not promptly removed, it will lead to disasters such as collapse of houses, which is an extremely important problem.

Therefore, as a conventional means of eliminating snow accumulation on roofs,
Various snow melting devices have been put into practical use that remove snow without requiring human labor.

For example, this type of snow melting device includes: (1) A pipe that circulates hot water or hot air is installed inside a block, or a mat-like structure is 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.

■Uses heat pipes and attaches them 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 mounted on the upper surface of the roof, and since it is arranged on cloth to some 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-mentioned problems, and its feature is that a heating medium heated by a heater equipped with an electric heater is heated by a circulation pump, In a snow-melting device that melts accumulated snow on a roof by circulating it in a conduit appropriately installed on the roof, the roof board 18 (so-called field board) that forms the roof
The conduit 16 is arranged in the concave groove 36 of the heat insulating material 30 provided above, and the opening surface of the concave groove 36 is covered with a heat sink 22, and the heat dissipation plate 22 is brought into contact with the conduit 16, and then It is located in a place covered with roofing material 14 such as tiles or corrugated iron.

(effect) Next, the operation of this invention will be explained.

The heating medium is heated by the heater, and the heating medium is circulated within the pipe line 16 by the circulation pump. Then, the heat of the heat medium is transferred to the heat sink 2.
2. The snow is transmitted to the roofing material 14 and melts the snow on the roof.

(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 the present invention has a heating unit 12 disposed in the attic, and the heat medium heated by the heating unit 1-12 is placed under a roofing material 14 such as a tile or galvanized iron as appropriate. The heating unit 12
is configured to return to

The heating unit 12 is composed of a heater with a heating 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. The roofing boards (hereinafter referred to as roofing boards 18) that make up the roof are placed over the rafters, and then the roofing boards 18
Spread a waterproof sheet 20 to cover the entire surface.

Then, a heat insulating board 30 is laid over the entire surface of the waterproof sheet 20. The upper surface of this heat insulating plate 30 has a concave groove 3 in which the pipe line 16 is disposed.
6 is engraved. Protrusions 38 are provided at appropriate positions on the inner side surface 36a and bottom surface 36b of this groove 36, and the conduit 16 is held in the space within the groove 36 without contacting the inner surface of the groove 36. (See Figure 9). And groove 3
6 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 16, the entire roof is covered with a waterproof sheet 24, and tiles 14a are placed on top of the roof.
Alternatively, the roof material 14 such as galvanized iron 14b is constructed in the same manner as in the past.

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 fluid repeatedly rising and falling, requiring a large circulation pump. Therefore, the rise of the heat medium,
In order to reduce the number of descents, the heat medium is once raised to the vicinity of the ridge 24a of the roof 24, and then lowered in a meandering manner across the slope of the roof.

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

Moreover, FIG. 4 shows a hipped roof. In this case, the pipe line 16 is divided into three blocks, and the ridges of the blocks on both sides are
The 4b side meanders along the ridge 24b to become wider, and the blocks in the center are arranged in the same manner as in FIG. 3(b).

On the other hand, in Figure 5, the width of the meandering at the eave part 24A of the roof is narrowed (the meandering density is made dense), and the meandering width at the top of the roof is widened.
The state in which the pipe line 16 is arranged (with a sparse meandering density) is shown. 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 that remained on the eaves area 24A, the meandering density of the eaves area 24A is arranged densely, and the eaves area 24A is
It can efficiently melt 4A of snow.

Next, the heat insulating board 30 will be explained. Figure 3 (a
), (b) and FIG. 4, there are two types of heat insulating plates 30 for arranging the conduit 16. Straight line pipe 1
6, and a curved panel 34, in which the curved 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 concave groove 36 has protrusions 3 on the 100-yen side surface 36a and the bottom surface 36b of the concave a36.
8 (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, and a first semicircular groove connecting adjacent grooves 42 is formed at the end of the groove a42. Bending groove 44A
is formed in a wide manner. Furthermore, two first bending grooves 4
A semicircular second bending groove 44B is formed wide so as to straddle 4A.

Note that the first and second bending grooves 44A and 44 are formed wide.
B absorbs expansion and contraction of the straight portion of the pipe 16. Further, a groove 42 is provided on the side opposite to the groove 42 on one end side of the curved panel 34.
A linear concave groove 46 is provided in a direction crossing the . Then, the short groove 42, the first and second bends 144A, 44B
, protrusions 38 are provided at appropriate positions on the linear groove 46. Further, the panel on the ridge 24b side of the hipped roof shown in FIG. 4 may be formed so that the bending grooves 44A and 44B side of the curved panel are 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 explained in which snow accumulation on the roof is prevented by installing a heat transfer pipe along with a non-slip device. The anti-slip device 48 provided across the roof prevents snow on the roof from sliding down all at once, and snow tends to stay on the eaves portion 24A where the anti-slip device 48 is provided. Therefore, the anti-slip device 48 and the heat medium conduit 16 were provided together.

For example, FIG. 10(a) shows a curved anti-slip tool 4.
8A is held at a position slightly raised from the roofing material (corrugated iron 14b), and the conduit 16 is located in the space below this curved anti-slip tool 48A. In FIG. 10(b), a pipe material 48B such as a steel pipe is used as a non-slip device.
8B to the roofing material (corrugated iron 14b), and this pipe material 48
A conduit 16 is inserted into the hollow space of B.

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 coated with a covering material 52 such as reinforced polyethylene or silicone tube for appropriately adjusting the heat radiation of the cough pipe 16,
It is placed in the gutter 50 (see FIGS. 2 and 11).

In addition, when the tile 14a is used as a roofing material and the conduit 16 is arranged under the tile 14b as described above, the tile 14
Since tile b is formed in a wave shape, the adjacent tile 14b and tile 1
A cavity 54 is formed in the direction of the slope of the roof at the joint with 4b. 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, it is possible to prevent warm air from flowing out and to prevent wasteful heat radiation (see FIG. 12).

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 5 consisting of a light emitting section 58A and a light receiving section 58B
8 is installed and connected to the power supply 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, a heat medium that can be heated to a high temperature, has a low melting point, and has a small specific heat is preferably used, such as ethylene glycol, triethylene glycol, and the like. Ethylene glycol has a molecular weight of 62.07, a boiling point of 197.6°C, and a melting point of -
It has physical properties of 13.0°C, specific gravity of 1.1155, and 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 outflow part 64a of the heat medium 70 of the snow melting part 64 are connected to the pipe 7
2a and a three-way switching valve 74a disposed between the pipe 72b.
A discharge pipe 72 is connected to the upper part of the heater 66.
c is provided. 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. 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.

Further, the three-way switching valve 74a and the four-way switching valve 74c, and the four-way switching valve 74c and the three-way switching valve 74b are connected to the connecting pipe 72, respectively.
It is connected by g, 72h.

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.
For heating purposes, water or ethylene glycol is used depending on the purpose. - There are three ways to use the circulation passage 62' as shown below.

First, it is used as a snow melting device.

In this case, in order to connect the heater 66 and the snow melting section 64 in series, the three-way switching valves 74a, 74b and the four-way switching valve 74c
Switch.

Therefore, the heat medium 70 heated by the electric heater 68 of the heater 66 is transferred from the connecting pipe 72h and the pipe 72f to the snow melting section 64, and then to the heater 6.
The snow circulates through the circuit returning to step 6, and melts the snow on the roof in the snow melting section 64 as described above.

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, the heater 66, the heating coil 80 and the snow melting section 64
(used as a heat collector in this case) are connected in series, three-way switching valves 74a, 74b and four-way switching valve 74c.
Switch.

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, heat is stored. Heat storage medium 8 in section 78
Heat is stored in 2. The stored N heat 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, in order to connect the heater 66 and the heating coil 80 in series, the three-way switching valves 74a, 74b and the four-way switching valve 74
Switch c.

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. Furthermore, 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.

Moreover, since the conduit is held floating in the space of the groove of the heat insulating plate, and the opening surface of the groove is covered by the heat dissipation plate so as to be in contact with the conduit, unnecessary heat radiation can be prevented.

Furthermore, when the heating unit is disposed in the attic, the attic space is warmed by some heat radiated from the heating unit, and dew condensation in the attic space can be prevented.

In addition, by using a heat medium with a high boiling point, low melting point, and low specific heat, such as ethylene glycol or triethylene glycol, which has a high boiling point and low specific heat, it is possible to store heat at a high temperature and reduce the internal volume of the heater. As mentioned above, the heating unit can be stored in the attic space. Furthermore, since the heat medium has a low melting point, it has the remarkable effect of being difficult to freeze.

On the other hand, by arranging the middle part of the pipe inside the gutter or along the anti-slip device, it is possible to prevent damage to the gutter due to freezing, and it is also possible to efficiently melt snow that remains near the anti-slip device. becomes.

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 diagram showing how the conduit is installed on the roof, Figure 2 is a front view of the house, and Figures 3 (a), (b), 4 and 5 are each of the pipes. Plan view showing the arrangement state, No. 6
The figure is a side view of the house, Figures 7 and 8 are plan views of straight panels and curved panels, Figure 9 is a partial sectional view showing the arrangement of conduits in the groove, Figure 10 (a), (b) is a cross-sectional view showing how the conduit is arranged along the anti-slip device, Fig. 11 is a cross-sectional view showing the conduit arranged in the gutter, Fig. 12 is a partial front view of the tiled roof, and Fig. 13 The figure is a perspective view showing a sensor that detects the amount of snow accumulation, and FIG. 14 is an explanatory view showing a circulation flow path of the snow melting device. 12... Heating unit, 14... Roofing material, 14a
...Tile, 14b...Tanium, 16...Pipeline,
18... Roof board, 20.24... Waterproof sheet,
22... Heat sink, 24... Roof, 24a, 2
4b...Building, 24A...Eave part, 26...
Anti-slip tool, 30... Heat insulating 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...Slip stopper, 5
0... 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 section, 64a... Outflow section, 66... Heater, 66A... Casing,
68... Electric heater, 70... Heat medium, 72a,
72b, 72d, 72e, 12f
・ ・ ・Pipe, 72c...Discharge pipe, 74a, 74b...Three-way switching valve, 74c...Four-way switching valve, 76...Circulation pump,
78... Heat storage section, 80... Heating coil, 82...
...N heat medium, 84a...supply pipe, 84b
...Exhaust pipe. Figure 1<-(b) Figure 4 Figure 11 Figure 12 Figure 7 Figure 8 Figure 14

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 equipped with an electric heater in a pipe suitably arranged on the roof, comprising: The conduit is placed in a concave groove of a heat insulating material placed on the roof board, and the opening surface of the concave groove is covered with a heat sink, the heat sink is brought into contact with the conduit, and tiles are placed over it. , a snow melting device characterized by being covered with a roofing material such as galvanized iron.