JP2014177859A - Roof snow-melting system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a roof snow-melting system being low in running cost.SOLUTION: A sealed space 2 using a sheet 4 is made under a snowfall surface for trying to melt snow, and a sealed space (a heating chamber) 5 having a heat source is provided under its space, and airtightness is held by directly connecting both spaces by a pipe. The snow is melted via the sheet by sending air warmed by the heating chamber to the sealed space by an air sending pipe based on the principle that warm air rises and cold air lowers, and the air chilled by snow-melting lowers in a recovery pipe, and returns to the heating chamber. The recovered air is reheated, and is circulated in the two spaces, so that the snow is melted by minimizing losing heat energy. Since there is risk of mixing condensation water and unexpected water leakage in the recovered air, the system is formed for separating water while holding the airtightness.

Description

  The present invention relates to roof snow melting using thermal energy and having a low running cost.

  Conventional snowmelt can be broadly divided into methods that use groundwater and heat sources, and devices that use hot water pipes, heating wires, and hot air have been developed for those that use heat sources. .

  The hot water pipe heats the constituent materials (roofing material, concrete pavement, etc.) through a heat exchanger to melt snow, so the heat efficiency from heating to snow melting is low and the running cost is very high compared to using groundwater. A device using a heating wire melts snow around the device, but releases heat to the outside air, so heat loss is large.

  There are also methods that use warm air to heat components from the attic, or to apply hot air directly from under the snow, but the former has low thermal conductivity and the latter has uneven snow melting, and there are holes in the snow. Since warm air is discharged from the outside air, heat loss is large and snow cannot be melted evenly.

  Japanese Patent Laid-Open No. 9-025741   JP-A-9-296629

  Conventional snow melting devices have high running costs due to poor thermal conductivity and thermal efficiency.

Since the device is special, maintenance by an installer is required, resulting in high costs.
In addition, when repairs and replacements occur due to the lapse of the service life of the equipment and failure, there is no option for the user, leaving it to the contractor, which is expensive in the long run.

A sealed space using a highly airtight sheet under the snow cover and a sealed space (heating chamber) for heating the air are provided below, and both spaces are directly connected by pipes or the like (air blowing / recovery) to maintain airtightness.
A system that efficiently melts snow on the seat by circulating it in a closed space without releasing the air heated in the heating chamber.

  Since the collected air contains water (condensation and unexpected water leakage), a separation device using a drain trap will be installed.

  The present invention is advantageous in that the construction cost at the time of construction is high but the thermal conductivity and thermal efficiency are high, and the structure is a simple principle, so that the maintenance is simple and the running cost is low.

Sectional drawing which shows embodiment of this invention Cross-sectional view showing an apparatus for separating air and water cooled by melting snow

  Hereinafter, embodiments of the present invention will be described with reference to FIGS.

  In FIG. 1, a sealed space 2 is created on a roof 1. In order to make a space, a certain space is secured on the roof 1 and a panel 3 is installed, and a highly airtight sheet 4 is stretched thereon.

  Between the sealed space (heating chamber 5) having a heat source for warming the air in the sealed space 2 is connected by a fan-fitted pipe 6 and a recovery pipe 7 to maintain airtightness.

  The warm air warmed by the heat source 8 in the heating chamber 5 rises to the sealed space 2 through the blower pipe 6 to warm the seat 4 and melt the snow accumulation 9. The melted water is drained to the outside through the drain pipe 10.

  The water (condensation / leakage) generated in the sheet 4 and the air (cold air) cooled by heat exchange descend and return to the heating chamber 5 through the recovery pipe 7.

  Cold air and water collected in the heating chamber 5 are separated by a device 11 using a drain trap, and the water is drained by a drain pipe 10. The separated air is recovered at the recovery port 12 and is heated and raised again to melt snow.

  As described above, by circulating the air once heated without releasing it, the heat efficiency is higher and the loss can be drastically reduced than when the fresh outside air is newly heated.

  Since the heat energy of the heated air is transmitted from the sheet 4 to the snow cover 9, the heat conductivity is high, and the snow can be sufficiently melted at a temperature at the time of heating even if it is not high.

  The seat 4 is provided with a fastener so as to correspond to a roof shape other than a rectangle, keeps airtightness, and can be separately stored except in winter.

  In order to melt the snow evenly, the gradient of the sheet 4 is reduced, and warm air is blown from a plurality of locations from the blower horizontal pipe 13, and air is generated by the fan 14 to stir the air to make the temperature uniform.

  In FIG. 2, a device 11 for separating air and water applies a drain trap, and a ball tap 16 is attached to maintain the sealed water 15, a recovery port 12 is attached during the operation period, and a valve 17 is opened at other times to supply water. The recovery port 12 is sealed.

  By installing the tower 18, the system can be managed safely and can be used as a rooftop.

  During operation, the sealed space 2 and the heating chamber 5 are both warm, but after the stop, the seat 4 is in contact with the outside air so that the space approaches the outside air temperature, so that the heat insulation performance of the heating chamber is improved, or the blower pipe 6 / recovery The pipe 7 needs to have a blocking function.

The features of this system are as follows. The starting time can be selected from the initial stage of snowfall or after the snow has accumulated to some extent.
2. The frame structure is not specialized in wooden structures, steel structures, reinforced concrete structures, etc., and can be applied to all structures.
3. Based on the principle that warm air rises and cold air descends, the position of the heating chamber does not have to be directly under the sealed space 2 and can be freely arranged by a blower / recovery pipe or the like.
4). As the heat source, an FF fan heater (gas / petroleum) that does not pollute the air, an electric heat storage heater, a wood heating stove, or the like can be used. Annex is also an option.
5. If the capacity of the heat source is high, the heating chamber can be used as a living room.
As described above, this system is an extremely versatile snow melting system.

1 Roof 2 Sealed space 3 Panel (A steel frame is welded with expandable metal with good air permeability and can be partly removed for management)
4 Seat 5 Heating room 6 Fan vertical pipe with fan 7 Recovery pipe (Cooling air and condensed water during operation, etc., other than that can be used for rainwater)
8 Heat source (FF fan heater, electric heat storage heater, wood heating stove, etc.)
9 Snow cover 10 Drain pipe 11 Air / water separator 12 Recovery port (with insect net, removable / sealable)
13 Blower horizontal pipe (with air volume adjustment function)
15 Sealed water 16 Ball tap 17 Valve 18 Tower

Claims (2)

A sealed space is created using a sheet under the snow cover, and a sealed space (heating chamber) for heating air is provided below the sealed space. Both spaces are directly connected by pipes (air blowing / collection) to maintain airtightness. Air heated in the heating chamber is blown into the sealed space, and air cooled by melting snow is collected in the heating chamber and reheated.
By using air and a highly airtight sheet as a heat energy medium for melting the snow and circulating the heated air without releasing it, heat loss is minimized and the snow on the sheet is efficiently removed. Melting snow melting system.   In order to circulate the air while maintaining airtightness, it is necessary to separate the air cooled by heat transfer from the condensed water generated on the seat, etc., and an air and water separator that applies a drain trap.

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