JPH09328928A - Snow removing method for membrane roof and building with membrane roof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To effectively remove snow on a membrane roof and reduce labor and equipment cost for installing facilities required to remove snow. SOLUTION: A building 1 with a membrane roof has a membrane roof 2 constructed by double membranes. A spit hole 9a to supple air (hot air or clod air) between the double membranes(a space)2c along the wall 4 of building 1 and a spit hole 6a to supply hot air into a room 3 are arranged. By supplying hot air from the spit hole 9a into the space 2c for a preset time, the accumulated snow 13 at the membrane roof portion 12 is thawed to form a water membrane. Cold air is supplied from the spit hole 9a into the space 2c for a preset time to freeze the water membrane and then hot air is supplied from the spit hole 9a into the space 2c for a preset time to thaw the frozen portion. In this way, the accumulated snow 13 is slided on the surface of the membrane roof and dropped down.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for removing snow accumulated on a membrane roof of a building, and a building with a membrane roof capable of implementing this method.

[0002]

2. Description of the Related Art As a conventional method for removing snow accumulated on a membrane roof, for example, as shown in JP-A-5-25957, a warm air duct is arranged over the entire rear surface of the membrane roof,
It is known that hot air is blown from a blowout port formed in this warm air duct to heat the membrane roof, thereby melting the snow accumulated on the membrane roof to remove snow.

[0003]

However, in such a method, the work of arranging the hot air ducts over the entire back surface of the membrane roof is very troublesome, the cost is high, and the membrane roof is simply heated. It was difficult to remove snow by sliding the snow on the membrane roof surface.

The present invention has been made by paying attention to the problems of the prior art as described above, and it is possible to reduce the labor and cost required for installing equipment necessary for snow removal, and to effectively remove snow. It is an object of the present invention to provide a method for removing snow from a membrane roof in which the method is applied, and a building with a membrane roof in which this method can be implemented.

[0005]

In order to solve the above problems, the invention according to claim 1 has a double-membrane structure for a membrane roof of a building with a membrane roof, and warm air is blown between the double membranes for a predetermined time. By melting the portion of the snow accumulated on the membrane roof on the membrane roof side to form a water film on the surface of the membrane roof, and then stopping the supply of warm air between the double membranes for a predetermined period of time. Snow removal of a membrane roof, characterized in that the water film is frozen, and then the frozen portion is melted by supplying hot air between the double membranes, and the snow on the membrane roof is slid and dropped on the surface of the membrane roof. It provides a method.

According to the second aspect of the present invention, the membrane roof of the building with a membrane roof has a double membrane structure, and hot air is supplied between the double membranes for a predetermined time to remove snow accumulated on the membrane roof. After forming a water film on the membrane roof surface by melting the membrane roof side part, cool air is supplied between the double films for a predetermined time to freeze the water film, and then hot air is supplied between the double films. Thus, there is provided a snow removal method for a membrane roof, characterized in that the frozen portion is melted and the snow accumulated on the membrane roof slides on the surface of the membrane roof and falls.

According to the third aspect of the present invention, the membrane roof has a double membrane structure, and the membrane roof air supply port for supplying hot air and cold air between the double membranes in a switchable manner and the hot air for supplying the air to the room. A building with a membrane roof, characterized in that the air supply port for air conditioning is arranged along the wall.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic cross-sectional view showing a building with a membrane roof to which an embodiment of the present invention is applied, and FIG. 2 is a layout diagram showing the arrangement of pipes and outlets of the building of FIG. .

A building 1 with a membrane roof shown in FIG. 1 is provided with a dome-shaped membrane roof 2, which is formed in a double membrane structure and has a space 2c between upper and lower membranes 2a and 2b. Air is blown into. The upper film 2a and the lower film 2b are both formed of a transparent material such as a vinyl sheet or a polyethylene film so that natural light can be taken into the room 3. Reference numeral 2d in FIG. 1 is an outlet for air blown into the space 2c between the upper and lower films 2a and 2b. Further, the upper and lower films 2a and 2b do not necessarily have to be formed of a translucent material.

An air-conditioning duct 5A and a membrane roof duct 5B are annularly arranged along the wall 4 above the inside of the wall 4 of the building 1, and the air-conditioning duct 5A has a room 3 inside. The short pipe 6 directed to the side is connected to the duct 5B for the membrane roof, and the short pipe 9 directed to the space 2c of the membrane roof 2 is connected thereto.

As shown in FIG. 2, the short pipe 6 is an air conditioning duct.
The air-conditioning ducts are arranged at equal intervals along the circumferential direction of 5A.
5A has a heat exchanger S for converting outside air into warm air.₁Is a fan
N F ₁Is connected through and is the tip of each short pipe 6.
Warm air is blown out from the outlet (air supply port for air conditioning) 6a
Then, the air conditioning of the room 3 is performed.

The short pipe 9 has the same pitch as that of the short pipe 6 described above.
Arranged at equal intervals along the circumferential direction of the membrane roof duct 5B
Therefore, heat exchange for converting outside air into warm air is performed in the membrane roof duct 5B.
Exchange S _TwoIs a fan F_TwoConnected via That
Therefore, blower fan F_TwoWith heat exchanger S_TwoActivate
For example, it is the tip of each short pipe 9 through the membrane roof duct 5B.
Space from the air outlet (air supply port for membrane roof) 9a to the membrane roof 2
Hot air is supplied to the inside of 2c, and the heat exchanger S_TwoDo not activate
Blower fan F_TwoIf you operate only the
Outside air (cold air) is supplied into the space 2c of the membrane roof 2. You
That is, heat exchanger S_TwoBy turning on / off, the membrane roof 2
The gas supplied into the space 2c of the
It is possible to exchange. In addition, the arrangement of the short pipe 6 and the short pipe 9
The locations are not necessarily evenly spaced along the circumference of each duct.
May be.

Therefore, in this building 1, the snow accumulated on the membrane roof 2 can be removed by the following methods. As a first method, at the same time as snowfall or after a certain amount of snow is accumulated, the heat exchanger S ₂ and the blower fan F ₂ are operated for a predetermined time to introduce warm air into the membrane roof duct 5B.
By supplying hot air into the space 2c of the membrane roof 2 from the outlet 9a of each short pipe 9, the portion 12 of the snow 13 accumulated on the membrane roof 2 on the membrane roof 2 side is melted to form a water film ( Snow melting on the membrane roof side).

After that, the heat exchanger S ₂ and the blower fan F ₂ are stopped for a predetermined time to stop the supply of warm air into the space 2c of the membrane roof 2 to freeze the water film (freezing of the water film). When the water film freezes and, for example, the amount of snowfall exceeds a certain amount, the heat exchanger S ₂ and the blower fan F ₂ are operated again,
Similarly to the above, by supplying hot air into the space 2c of the membrane roof 2, the frozen portion is melted on the entire surface of the membrane roof 2 (melting of the frozen portion). As a result, the snow on the membrane roof 2 slips and falls from the surface of the membrane roof 2.

While snow is being removed by this method, the room
The air conditioning in 3 is installed independently of the membrane roof duct 5B.
Through the air conditioning duct 5A₁And blast fan
N F ₁The warm air generated by the operation of the
Completely independent from snow removal by being blown out toward
Done in

As a second method, the snow melting on the membrane roof side is performed in the same manner as described above, and the freezing of the water film is performed by operating the blower fan F ₂ for a predetermined time with the heat exchanger S ₂ stopped. Is introduced into the membrane roof duct 5B, and outside air is supplied from the outlets 9a of the short pipes 9 into the space 2c of the membrane roof 2. The subsequent melting of the frozen portion is performed in the same manner as above.

Also in the case of this method, the air conditioning of the room 3 is performed completely independently of the snow removal. Further, since the freezing of the water film is performed by supplying the outside air (cold air) into the space 2c of the film roof 2, the freezing of the water film is performed in a shorter time than in the case of the first method. This can shorten the snow removal cycle,
This method is particularly effective when it is desired to remove snow before the amount of snowfall becomes too large.

As a third method, the snowmelt on the membrane roof side is supplied to the room 3 through the outlet 6a by the heating operation of the room 3 (that is, the operation of the heat exchanger S ₁ and the blower fan F ₁ ). The water film freezes when the heating operation is stopped when the indoor 3 is used, and the iced portion is melted when the heating operation starts when the indoor 3 is used again. Is slid from the surface of the membrane roof 2 and dropped.

In this method, the hot air is not supplied from the outlet 9a to the space 2c, but the air in the space 2c is warmed by the heat of the warm air in the room 3 transmitted through the lower membrane 2b.
The warm air melts the snow on the roof side of the membrane and the icing area. Therefore, the usage state of the building 1 repeats heating the room 3 for a predetermined time (time necessary for forming a water film) and then stopping heating for a predetermined time (time necessary for freezing of the water film). Only when the above condition is satisfied, it is possible to efficiently remove snow using only warm air that accumulates in the indoor heating as energy.

Further, basically, the third method is adopted, and in the case where the snow melting on the membrane roof side and the frosted portion cannot be sufficiently melted only by the warm air accumulated upward by the indoor heating, the outlet is supplementarily provided. The hot air is supplied from 9a to the space 2c, or the snow melting on the membrane roof side part is performed by using the warm air that accumulates upward in the room heating, and the temperature from the outlet 9a to the space 2c is removed at the time when you want to remove snow. Alternatively, air may be supplied to melt the frozen portion. In this way, snow removal is surely performed while effectively utilizing the warm air that is accumulated above in the indoor heating, so that the cost can be kept lower than in the first and second methods.

As described above, in the above embodiment, the membrane roof 2
Since it has a double membrane structure, it is not necessary to dispose the warm air duct over the entire back surface of the membrane roof as in the case of a single membrane. Therefore, it is possible to reduce the labor and cost for installing the equipment required for snow removal. Also, because the procedure of snow melting on the membrane roof side → freezing of the water film → melting of the frozen part is performed, compared to the method of simply warming the membrane roof,
Snow is effectively removed with a small amount of heat energy.

[0022]

As described above, according to the methods of claims 1 and 2, it is possible to reduce the labor and cost required for installing the equipment necessary for snow removal, and to use less heat energy. Snow is removed.

In particular, according to the second aspect, the snow removal cycle can be shortened, so that it is particularly effective when it is desired to remove snow before the amount of snow accumulation becomes large. According to claim 3, the method of claim 2 can be easily implemented.

[Brief description of drawings]

FIG. 1 is a schematic cross-sectional view showing a building with a membrane roof to which an embodiment of the present invention is applied.

FIG. 2 is a layout diagram showing a layout of pipes and air outlets included in the building of FIG.

[Explanation of symbols]

1 Building with a Membrane Roof 2 Membrane Roof 2a Upper Membrane 2b Lower Membrane 2c Space 3 Indoors 4 Walls 5B Membrane Roof Duct 6 Short Pipe 6a Air Outlet (Air Supply Port for Air Conditioning) 9 Short Pipe 9a Air Outlet (for Membrane Roof) air supply port) S ₂ film roofing supply heat exchanger for the air

Claims (3)

[Claims] 1. A membrane roof of a building with a membrane roof has a double membrane structure, and hot air is supplied between the double membranes for a predetermined time so that a portion of the snow accumulated on the membrane roof on the membrane roof side is removed. After melting to form a water film on the membrane roof surface, supply of hot air between the double membranes is stopped for a predetermined time to freeze the water film, and then,
A method for removing snow from a membrane roof, characterized in that the frozen portion is melted by supplying warm air between the double membranes, and the snow on the membrane roof slides on the surface of the membrane roof and falls. 2. A membrane roof of a building with a membrane roof has a double membrane structure, and hot air is supplied between the double membranes for a predetermined time so that a portion of the snow accumulated on the membrane roof on the membrane roof side is removed. After melting to form a water film on the membrane roof surface, cold air is supplied between the double membranes for a predetermined time to freeze the water film, and then warm air is supplied between the double membranes to remove the frozen portion. Melt,
A snow removal method for a membrane roof, characterized in that the snow accumulated on the membrane roof is slid on the surface of the membrane roof and dropped. 3. A membrane roof having a double membrane structure, a membrane roof air supply port for supplying hot air and cold air between the double membranes in a switchable manner, and an air conditioning air supply port for supplying warm air to the room. A building with a membrane roof characterized in that and are arranged along the wall.