JPH0617404A - Snow melting device on footpath - Google Patents

Abstract

PURPOSE:To efficiently melt snow without adopting water spraying system, without obstructing people's pass because normal condition of a footpath is maintained visually, and also without requiring manpower. CONSTITUTION:An air chamber 5 formed by a groove type concrete wall 9 buried along the lateral center of a footpath 3 and a steel plate 11 sealing the top of it is provided under the footpath 3. And a pipe 6 for passing a heating medium to heat air is laied down in the air chamber, and a surface layer 15 of the footpath 3 is formed with the steel plate faced downward. Accordingly, air in the air chamber 5 is heated by the pipe 6 through which the heating medium is passed to melt snow concentratedly at the lateral center of the footpath 3. Thus, because a least path which is convenient for people to walk around can be maintained by the minimum energy without waste, thermal efficiency is increased to suit for energy saving.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a snow melting device for a sidewalk provided beside a road on which vehicles pass or a sidewalk with few vehicles passing.

[0002]

2. Description of the Related Art In a snowfall area, when the amount of snow is large, the traffic is paralyzed, which seriously hinders commuting, attending school, industrial activities and daily life. . However, in the past, as for the snow melting device on the sidewalk, since the snow melting devices to date have not been functionally suitable, the present situation is that the progress has not been made.

In the conventional snow melting device, a groove is dug in the center of the road where the height is highest, nozzles are attached to water passage pipes that are routed in the groove at equal intervals, and the groove is filled with concrete to provide an upper surface. It is configured by exposing the nozzle to.

Since the nozzle is provided with a large number of water discharge holes, when water is pumped, water is jetted widely from the nozzle to the shoulders of the road, so that the road is snow-melted over the entire area. To be done.

[0005]

Since the conventional snow melting apparatus uses water having the largest specific heat, it exhibits an outstanding snow-dissipating ability when the temperature difference with respect to the freezing point is large.
Groundwater is usually used for water that reaches temperatures near freezing in winter, such as river water and lake water, because it has almost no snow-melting ability.

[0006] However, not only the area where the groundwater can be obtained is limited, but in the present day when the groundwater is exhausted, the area where the underground water can be obtained is limited, and even if it can be obtained, the problem of land subsidence and depletion of groundwater. Occurs.

The reason why the snow-melting device is not provided on the sidewalk is that there is a problem of using groundwater as described above, but rather, the conventional snow-melting device uses an inconvenient water discharge method in which a passerby is splashed with water. As a result, it becomes an obstacle for people to come and go.

In areas where water is abundant, there is a method in which a water passage is provided on the side of the sidewalk, and while flowing a large amount of water, the snow on the sidewalk is thrown into the water passage and then flowed downstream. Not only is the area limited, it requires a labor force throughout the area, and since the work is started when there is a large amount of snow, it becomes an obstacle to traffic until then.

The present invention has been made in view of the above circumstances.
To provide a snow-melting device for a sidewalk that does not obstruct the passage of people because it does not use a water discharge method and maintains the normal normal state of the sidewalk in appearance, and that can efficiently remove snow without requiring human power. Aimed at.

[0010]

In order to achieve the above-mentioned object, the present invention provides a groove-shaped concrete wall which is buried under the sidewalk along the center of the width and an iron plate which seals the wall. An air chamber was provided, and a pipe for passing a heat medium for heating the air was laid in the air chamber, and a surface layer of the sidewalk was formed with the iron plate facing down to form a snow melting device for the sidewalk.

When the heat medium is warm air, hot air blowing holes may be provided in a row on the upper surface of the pipe through which the heat medium is warmed to rapidly warm the air in the air chamber and the iron plate.

[0012]

[Operation] Since the snow-melting device on the sidewalk is configured as described above,
When the heat medium is passed through the pipe, the air chamber is warmed,
Since the air with high temperature rises, in the air chamber, the temperature is kept high in the upper layer, and the surface layer of the sidewalk is warmed through the iron plate with good thermal conductivity, and the minimum necessary amount on the iron plate is maintained. In the range, snow is efficiently melted, and at the time of snowfall, it is possible to secure a road in the center of the sidewalk through which people can pass without trouble.

If the sidewalk is composed of an asphalt layer, the asphalt layer will exert an appropriate heat retaining effect if it is heated by this snow melting device from an appropriate time before snowfall.
Similarly, the soil layer or sand layer around the snow melting device also exerts an appropriate heat insulating or heat insulating function.

Although the temperature is relatively less conducted from the air chamber to both sides, snow melting spreads, so even if there is snow on both sides, there will be a gentle slope of snow remaining in the passage.

[0015]

Embodiments of the present invention will now be described with reference to the drawings. 1 and 2 show an embodiment,
The snow-melting device for the sidewalk is implemented on the sidewalk 3 provided beside the road 1, but it can also be implemented on a so-called narrow road or alley.

The sidewalk 3 is a passage of a general asphalt pavement in appearance, but an air chamber 5 is provided under the center of the width of the sidewalk 3, and a pipe 6 is provided at the bottom thereof. Regarding the configuration of the air chamber 5, the ground 7 of the sidewalk 3 is used as a highly heat-retaining sand layer or gravel layer, the central portion thereof is dug up, a concrete wall 9 is constructed in a groove shape, and an iron plate 11 is placed on it. is there. The groove width of the concrete wall 9 is, for example, 60 to 1
The height is 00 cm and the height is about 15 to 30 cm.

Regarding the pavement of the sidewalk 3, a gravel 13 is laid down, and a surface layer 15 is formed on the pavement 13 by asphalt pavement. Further, on the opposite side of the road 1, a gutter 17 serving as a boundary with a private house is provided, and on the road 1 side, a drainage channel 19 is provided. However, the drainage path 19 is not always necessary if the road 1 is provided with another drainage means.

The concrete wall 9 is formed such that the bottom thereof is gradually lowered toward the center of the width thereof, the pipe 6 is provided at the lowest portion thereof, and the drainage pipes 21 are buried in places. Air chamber 5
When the water is heated, dew condensation occurs on the inner surface of the concrete wall 9, so that the dew condensation water is drained from the drain pipe 21 to the ground 7 and absorbed by the ground 7.

.. are blown out at regular intervals on the upper surface of the pipe 6, and the warm air pressure-fed from the air conditioner 25 is directed upward from the blowout holes 23 to the air chamber 5. And the iron plate 11 is directly heated. Also, the air chamber 5
In, since the heated air stays in the upper part of the air chamber 5, the iron plate 11 is heated.

Since the iron plate 11 has good thermal conductivity and is in the most warmed position in the air chamber 5, in the surface layer 15, snow is most easily melted on the iron plate 11, and the concrete wall Since the ground 7 is also warmed via 9, the entire sidewalk 3 is melted by snow.

Since the iron plate 11 is warmed most and the asphalt has a heat-retaining effect, snow is efficiently melted in the width center portion of the sidewalk 3, resulting in a large amount of snowfall.
By adjusting the air conditioner 25, a passage is secured at least there (FIG. 1). Even if snow 24, 24 remains on both sides,
It has a low, gentle slope to the aisle, making it an easy passage.

The air conditioner 25 comprises a compressor 26 and an electric heater 28, and the snow melting capacity is adjusted by the amount of air sent and the amount of superheat. Also, during the daytime, snow melting is promoted by the relatively high outside temperature and the traffic of people,
Even if there is snow, it is not necessary to operate the air conditioner 25, and it is possible to secure the minimum required passage for an inexpensive late-night fare.

Therefore, the air conditioner 25 is equipped with a control device that operates during snowfall in the time zone in which the late night electricity charge is received. A snowfall sensor is used for this.

FIG. 3 shows another embodiment. In the above embodiment, the tip of the pipe 6 is tightly plugged. In this case, the pipe 6 is returned to the feeding device 26a as a compressor. Due to this circulation system, the air chamber 5
In, there are two pipes 6. Also,
The air chamber 5 is warmed by the heat radiation from the pipe 6 without providing the blowout hole. In such piping, the pipe 6
Alternatively, hot water may be passed as a heat medium in addition to air.

FIG. 4 shows a pipe 6 through which a heat medium (air or water) is passed to circulate deep underground from the air chamber 5 in order to warm the air chamber 5 by utilizing underground heat. The electric appliance 28 is used as a supplement. 30 is the switching valve.

The geothermal heat under the sidewalk 3 causes the pavement of sidewalks and roads,
Or, it is suitable for use of underground heat because it is retained even in winter due to the crowded private houses.

[0027]

As described above, according to the present invention, the air in the air chamber is warmed by the pipe for passing the heat medium, and the central portion of the width of the sidewalk on the pipe is intensively melted by the minimum energy. Since a minimum number of passages convenient for people to come and go can be secured without waste, it has good thermal efficiency and is suitable for energy saving.

Since groundwater is not always used as the heat medium, there is no regional restriction on the installation, and since the normal condition is maintained on the sidewalk, unlike the case of water discharge. It has an excellent effect that it does not obstruct the passage of people and can keep the appearance of the sidewalk.

In addition, as the energy required to operate the snow-melting device on the sidewalk, even if only the power for the late night charge is used, the temperature of the air chamber is maintained for a long time after the operation is stopped because of the heat retaining property of the air. , It is possible to effectively secure the passage even during the day.

When the pipe is provided with an air outlet (claim 2), the air in the air chamber is heated rapidly and the iron plate is directly heated, so that it is possible to cope with a large amount of snowfall in a short time. It's easy to do. In addition, the problem that the blowout holes are clogged due to the passage of people or vehicles will never occur.

[Brief description of drawings]

FIG. 1 is a cross-sectional perspective view of a sidewalk showing a main part of the present invention.

FIG. 2 is an overall explanatory view of the same embodiment.

FIG. 3 is an overall explanatory view of another embodiment.

FIG. 4 is an overall explanatory view of another embodiment.

[Explanation of symbols]

 3 Sidewalk 5 Air chamber 6 Pipe 9 Concrete wall 11 Iron plate 15 Surface layer 23 Outlet hole

Claims (2)

[Claims] 1. An air chamber is provided under a walkway by a groove-shaped concrete wall buried along the center of the width and an iron plate sealing the wall, and a pipe for passing a heat medium for heating the air into the air chamber. A snow-melting device for sidewalks, in which the surface layer of the sidewalk is formed with the steel pipe down. 2. The snow melting device for a sidewalk according to claim 1, wherein the heat medium is warm air, and hot air blowing holes are provided in a row on an upper surface of a pipe through which the heat medium flows.