JPH04336181A - Snow-melting roof device - Google Patents

Abstract

PURPOSE:To melt snow at a low cost effectively. CONSTITUTION:Sheathing plates 9 are provided on the surface of roof frames 3 composed of a mainhouse 1 and rafters 2, roof coating materials are provided further on them, and heat insulation materials are provided at a bottom part and circumferential side parts to form closed spaces 5. Heat transfer tubes 6 through which heat fluid goes are stopped to the rafters 2 to be disposed in the closed spaces 5, so the closed space 5 is set to be a heat space by heat radiated from the heat transfer tubes 6, thereby snow accumulated on a roof 7 is melted by radiated heat from the heat spaces.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a snow melting roof device that can efficiently melt accumulated snow on a roof.

0002

[Prior Art and Problems to be Solved by the Invention] In general, snow melting roofs and roof snow melting systems are based on a heat source system,
・・For example, a hot water boiler, etc. ・B Heat transport system ・・Pipes, ducts, etc. ・C Heat radiation system ・It consists of three elements such as heat radiation panels, heat pipes, etc.

However, regarding a and b, no equipment members dedicated to snow melting have been developed, and the various snow melting roofs and roof snow melting systems currently proposed are all related to c.

[0004] Currently, the equipment cost for snow melting roofs is generally around 3 million yen per 150 m2, making them extremely expensive.

[0005] Most of this cost is for c. c is independently developed by each snow melting manufacturer,
An expensive heat dissipation system separate from the roof structure is added to the regular roof structure.
(For example, the snow melting manufacturer's own heat dissipation device) will be attached.

[0006] Incidentally, the structural material called a roof is generally laid on a roof frame consisting of a main building and rafters in the following order: a thin wooden board called a roof board (wooden panel), then a waterproof sheet, and then a metal roof board on top of that. It has a similar structure.

Conventional heat dissipation systems (heat panels, etc.) for snow melting roofs are installed above or below the metal roof panels, but in any case, they are installed above the sheathing panels.

[0008] This is because even though the wooden roofing board has insulation properties, it was thought that even if a heat dissipation system was installed under the roofing board, the snow melting efficiency would be poor because heat conduction would be slow. . However, in the conventional example in which the heat dissipation section is provided above the roof board, the pursuit of high thermal efficiency results in the fatal drawback of uneven melting of snow.

[0009] In other words, a heat panel with good thermal efficiency (good thermal conductivity) has a large temperature difference between the vicinity of the heat introduction part and the part away from the heat introduction part, and therefore it is impossible to melt snow evenly with the heat panel. .

The present invention solves these drawbacks of the conventional example, and is completely different from the conventional example in which the heat dissipation system was considered separately from the architectural structural material called the roof. Our technical challenge is to provide a very inexpensive snow-melting roof device that utilizes the roofing boards that are naturally present in the timber as a heat dissipation system (using the space in the roof frame consisting of the purlin and rafters as a heat dissipation system). That is.

[0011]

SUMMARY OF THE INVENTION The gist of the present invention will be explained with reference to the accompanying drawings.

[0012] On the surface of the roof frame 3 composed of the main building 1 and the rafters 2, a roofing board 8 and a roof covering material 10 are provided on the upper side, and a heat insulating material 4 is provided on the bottom and surrounding sides to create a closed space 5. A heat transfer tube 6 is formed and the thermal fluid passes through this closed space 5.
is fixed to the rafters 2, the closed space 5 is set as a thermal space by the heat radiated from the heat transfer pipe 6, and the snow on the roof 7 is melted by the heat radiated from this thermal space. The present invention relates to a snow melting roof device characterized by:

[0013]

[Operation] The heat transferred by the heat transfer pipe 6 heats the closed space 5.

The heat transfer pipe 6 is secured to the rafter 2, and no special means for fixing the heat transfer pipe 6 is required.

Since the enclosed space 5 has a sheathing board 8 on the surface and a heat insulating material 4 on the bottom and surrounding sides, the heat introduced into the enclosed space 5 is immediately transferred from the sheathing board 8 to the roof covering material 10. The entire inside of the shielded space 5 is heated and becomes a space of uniform temperature. The heat in this shielded space 5 is gradually but evenly transferred to the entire roof covering material 10 through the roofing board 8, and the snow on the roof 7 is melted evenly and evenly.

[0016]

[Example] The drawing shows the case where the present invention is implemented on a normal sloping roof, but any type of roof may be used, such as a so-called M-shaped roof with high sides and a drainage gutter at the bottom of the central valley. Any roof structure may be used as long as the closed space 5 is formed by the main building 1 and the rafters 2.

Notch recesses 11 are formed at predetermined locations on the surface of the rafter 1 at intervals of about 30 cm, and a soft and flexible polybdenum pipe that does not require a joint is placed in the notch recess 11. A pump 12 and a boiler 13 are connected to each other so that hot water can be sent to the polybdenum pipe. Polybdenum pipes do not have any joints, so no maintenance is required. Foamed urethane is provided as a heat insulating material 4 at the bottom and circumference of the roof frame 3 to prevent heat radiation from the closed space 5 to the attic.

If the heat insulating material 4 is made of a material inferior in heat insulating performance to that of the sheathing board 8 disposed on the surface of the roof frame 3, it is undesirable because heat radiation to the attic cannot be prevented.

Therefore, it is most desirable to use a heat insulating material 4 having a heat insulating performance higher than that of the roof board 8.
If this is adopted, the heat in the shielded space 5 will be efficiently transferred from the sheathing board 8 to the roof covering material 10, albeit gradually, without escaping to the attic.

Reference numeral 9 is a resin waterproof sheet, and 14 is an iron plate tile roof.

[0021] When hot water of about 70°C is passed through a polybdenum pipe for about 12 hours on a roof with an area of about 150 m2, the enclosed space 5, which is about 2 to 3°C, is heated to about 20°C ( The roof board 8 was heated to about 10°C), and the snow on the roof 7 was evenly melted.

[0022] The snow melting performance in this case is 25 to 3 in terms of fresh snow.
0cm/day, and it has also been tested that it is possible to melt snow from 1m of snow to 0cm with this high efficiency.

[0023] In this example, 92 kc per 1 m2
It has been confirmed through experiments that heat is dissipated at a rate of al/h, and the snow melting efficiency is over 85%.

[0024] Since this embodiment does not use an expensive member called a heat dissipation system (heat panel),
It can be completed at half the price of the conventional model, which costs about 500,000 yen.

Furthermore, in this embodiment, there is no need to operate the snow melting device at the same time as the snow falls as in the conventional case, and the snow can be sufficiently melted after the snow has fallen.
The performance of the boiler, which had to be designed at 1/2 to 300 kcal/h, can be reduced to 1/2 to 1/3, and running costs can be reduced accordingly compared to the conventional example.

[0026]

[Effects of the Invention] Since the present invention is configured as described above,
A heat panel or the like is not required, and a conventional roof can be used as is, so that a very inexpensive snow melting roof can be provided.

Furthermore, the snow melting roof according to the present invention, unlike the conventional example which causes snow melting unevenly, can melt snow slowly but evenly, and the heat for snow melting can be transferred to a closed space due to the presence of the heat insulating material. Since no heat is transferred downward from the roof, all the heat is radiated evenly from the roofing boards, and snow on the roof is melted evenly, which is an excellent result.

[Brief explanation of drawings]

FIG. 1 is an explanatory perspective view of the present invention.

FIG. 2 is a vertical cross-sectional view of essential parts of the present invention.

FIG. 3 is a cross-sectional view of essential parts of the present invention.

[Explanation of symbols]

1 Main building 2 Rafters 3 Roof skeleton 4 Insulation material 5. Closed space 6 Heat transfer tube 7 Roof 8 Field board 10 Roof covering material

Claims (1)

[Claims] Claim 1: On the surface of the roof frame consisting of the main house and rafters, a roof board is provided, and a roof covering material is provided on the upper side, and a heat insulating material is provided on the bottom and surrounding sides to form a closed space. A heat transfer pipe through which thermal fluid passes through the closed space is installed by being locked to the rafters, and the closed space is set as a thermal space by the heat radiated from this heat transfer pipe, and the heat radiated from this heat space causes the roof to rise. A snow-melting roof device that melts snow on the roof.