JPH08296204A - Regenerative snow melting device and snow melting method - Google Patents

Abstract

PURPOSE: To provide a regenerative snow melting device, which can be easily located and of which maintenance is facilitated and of which running cost is low, by controlling a burner, a blower and a dumper, and selectively switching a device between the heat accumulation stage and the circulation stage. CONSTITUTION: Both ends of heat radiating pipes 2-4 having the heat accumulating function are opened so as to form an inflow part and an outflow part, and a burner 1 is arranged in the inflow part, and a blower 8 is arranged in the appropriate position of the intermediate part of the heat radiating pipe. Automatic opening and closing dumpers 5-7 are arranged near the inflow part and the outflow part and near the suction side of the blower 8. On the basis of the information from sensors provided at the appropriate positions of a place to be heated, a control box 9 controls the burner 1, the blower 8 and the dumpers 5-7. This snow melting device is selectively switched between the heat accumulation stage for discharging the hot air generated by the ignition of the burner 1 outside through the heat radiating pipes 2-4 and while heat-accumulating inside of a pipe and the circulation stage for controlling the dumpers after stopping the burner 1 so as to circulate the hot air inside of the pipe.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat storage type snow melting apparatus and method for circulating snow in a pipe having a heat storage function to melt snow.

[0002]

2. Description of the Related Art Conventionally, snow is regularly removed in a snowfall area because snow accumulates on the ground in winter.
The main purpose of this snow removal work is on roads in the city and in the neighborhood of houses, but there are problems such as securing a place to throw away snow after snow removal and noise accompanying nighttime work, and its solution is desired. In order to cover the difficulty of this snow removal work, in recent years, a snow melting machine that artificially gives heat to the snow to melt it, and a heating pipe is buried inside the road surface, and this heat generation quickly melts the snow on the road surface. Severe road heating is often used. However, most of the above-mentioned snow melting uses hot water or electric heat, and at present, it has not been put on the market as a snow melting device using hot air, particularly for road heating.

[0003]

Among the conventional snow melting devices, the one used as road heating, which uses electric heat, consumes less power because it uses a resistance heating element such as nichrome wire. It will be large and economically heavy. Further, in the hot water type, since the water heated by the kerosene boiler flows into the buried pipe, the loss of heat exchange increases. This warms the water with the hot gases of burning kerosene, but the heat escapes with the smoke from the flues, causing losses. The burning of this kerosene is carried out intermittently due to the temperature change detected by the sensor, but when the boiler is stopped, cold air conversely enters from the flue connected to the outside air,
Here too, heat loss occurs. A baffle plate or the like is provided in the vicinity of the heat exchange part to reduce the flow rate of the high temperature gas to improve the heat exchange efficiency. However, this baffle plate is red-heated and is greatly damaged. The present invention has been invented in order to solve the problems related to the conventional snow melting method and apparatus as described above, and has a high thermal efficiency,
Further, the present invention provides a snow melting apparatus and method suitable for a road heating system, which can reduce the running cost.

[0004]

As a means for solving the problems, the present invention intends to reduce the running cost by allowing hot air to pass through the heat storage tube and repeating the heat storage step and the circulation step under the control of each device. That is, one of the present invention is a heat dissipation pipe having a heat storage function, which is arranged and connected in a suitable shape at a snow melting point, and has both ends thereof opened to form an inflow part and an outflow part, and a burner is connected to the inflow part and the heat dissipation pipe is connected. A blower is placed and connected in an appropriate place in the middle part of the burner, and automatic opening / closing dampers are placed near the burner and the outflow part and near the suction side of the blower, and a temperature sensor is placed in the appropriate place for heating by the heat radiating pipe. By providing a control box having a control circuit for controlling the operation of each of the equipment, based on the information from the temperature sensor, by a command issued from within the control box,
By controlling the burners, blowers, and dampers described above, there are a heat storage stage that stores heat inside the pipe while discharging hot air from the burner ignition to the outside through a radiation pipe, and a circulation stage that circulates the hot air by performing damper control after the burner is stopped. It is a heat storage type snow melting device configured to be selectively performed. Another aspect of the present invention is to provide a hot air delivery means at the end of the snow melting point and a heat storage tube having the other end open, and provide a blower device at a proper position for the heat storage tube to store heat. Inside the pipe, the hot-air delivery means, the pipe opening and closing means, and the pipe opening / closing means are provided in the vicinity of the suction part of the blower, and these hot-air sending means, blower equipment, and pipe opening / closing means are controlled by a separate control circuit. The heat storage stage in which the sent hot air passes through the heat storage pipe and is discharged to the outside while storing heat in the pipe, and the circulation stage in which the hot air is circulated by driving the blower device after stopping the hot air delivery means is selectively performed. This is a heat storage type snow melting method.

[0005]

The operation of the present invention will be described with reference to FIGS. FIG. 3 shows the heat storage step of the present invention. In the figure, 1 is a burner as a hot air delivery means, 2 to 4 are heat storage type radiating pipes, 5 to 7 are dampers as a conduit opening / closing means, and 8 is a blower (blowing device). In FIG. 3, the right side from the left side and the upper side from the lower side are slightly higher. This is taken into consideration in order to smoothly discharge hot air (warm air) because this pipe can be regarded as a flue. Now, when the dampers 5 and 6 are opened, the damper 7 is closed, and the burner is ignited with the blower stopped, the hot air blown out from the burner causes the heat radiation pipe 2
To the damper 6 through the heat dissipation pipe 3, the heat dissipation pipe 4, and the like. Since the damper 6 is open, hot air passes through this damper and is discharged to the outside. In this process, hot air from the burner accumulates heat in the radiating pipe, and the pipe temperature rises. In addition,
Since the damper 7 is closed, hot air does not pass through the radiating pipe and the blower in this portion. Next, as shown in FIG. 4, the burner is stopped, the damper 7 is opened, the dampers 5 and 6 are closed, and the blower is operated. The hot air in the heat radiation pipe is sucked and released by the blower and circulates in the heat radiation pipe (circulation stage). Then, with the passage of time, the accumulated heat is released to the outside to melt snow, and the heat radiation pipe temperature decreases. Then, the burner ignition is performed again to enter the heat storage stage, and the above respective patterns are repeated. According to the present invention, since hot air (warm air) is discharged to the outside only in the heat storage stage as described above, heat loss is small, and since liquid is not used, installation and maintenance are easy.
In addition, as shown in Examples described later, by using a temperature sensor and a snow sensor together, it is possible to make the running cost more advantageous.

[0006]

Embodiments of the present invention will be described below. In FIG. 1, 1 is a burner using kerosene, 2 is a heat radiation main pipe of a heat storage structure, 3 (3a to 3e) are branch pipes of the same heat storage structure, a plurality of which are provided on the side surface of the heat radiation main pipe, and branch connection pipes 4 and others. The ends are attached. All of these tubes have a heat storage structure, and a slate tube was used in this example. Then, the burner 1 is connected to one end of the heat dissipation main pipe, and the burner 1 is connected near the burner.
A damper A is provided. 6 is a damper B provided near the open end of the branch connecting pipe, and 7 is a damper C provided in the middle of the branch pipe 3e. Opening and closing of the damper A, damper B, and damper C described above are controlled by driving a motor. A blower 8 is provided in the middle of the branch pipe 3e, and is installed at a position slightly closer to the branch connection pipe than the damper C. Reference numeral 9 denotes a control box incorporating a control circuit for each device, to which the above-mentioned burner, damper, blower, etc. are connected by electric wiring. Reference numeral 10 denotes a temperature sensor, which is provided at an arbitrary heating place and is connected to the control box. A snow sensor 11 is provided above the ground and detects snowfall and transmits information to the control box. 12 is a switch, which turns on the device
・ Set the temperature to OFF and connect to the control box.

The present invention uses the conventional method of liquid circulation to radiate heat.
It was created to improve the drawbacks of snow melting and uses a gas circulation system. Since ancient times, Ondol (which makes a groove under the floor and warms the room through bonfire smoke) has been used in South Korea, but this has the highest temperature at the bonnet, and the temperature gradually increases as it goes deeper into the flue. Come down. In the present invention,
The temperature of the heat storage tube (radiation tube) is made uniform by using the tube of heat storage structure and by alternately using the heat storage step and the circulation step, and it is converted into one suitable for snow melting. With this method, it is possible to eliminate the temperature difference in the tube and reduce the heat loss due to the release of hot air to the outside, and it is possible to efficiently operate the heat supply. The function of the present invention is partially described in the section of action, but in this example, the temperature sensor and the snow sensor are provided to obtain the optimum operating state. The temperature sensor is provided at an appropriate place on the ground where snow is about to melt, and the snow sensor is provided at a position of about 1.5 to 2 m above the ground.
Only when the information from both the sensors match, if the road surface temperature check shows that the temperature is low, burner ignition is performed to start the heat storage stage and shift to the circulation stage. That is, when the road surface temperature is high during snowfall, or when the road surface temperature is low but there is no snowfall, the operation of this device is not performed. Therefore, the operation is performed only during snowfall and when the road surface temperature is low, and the consumption of kerosene or the like can be minimized. If necessary, a pipe air temperature sensor may be provided at an appropriate place to control the amount of heat generated by the pipe body. In this example, a slate tube was used as the heat storage type radiation tube. This slate pipe is made by mixing asbestos with cement (limestone containing viscosity or viscosity and burning it into powder) and molding it into a tubular shape, with heat resistance and heat storage,
It is convenient to use. Note that other heat storage materials, bricks, and ceramics can be used regardless of the slate of this example. Further, a metal tube whose surface is coated with a heat storage material can also be used. For example, in a stainless tube,
A composite polymer emulsion mixed with an inorganic aggregate (silica sand, ceramic) may be coated to a predetermined thickness. The shape of the heat radiating pipe can be arbitrarily set and is not limited to this example.

[0008]

According to the present invention, the heat radiation stage can be maintained at a predetermined temperature by repeating the heat storage stage and the circulation stage, so that the heat loss can be reduced as compared with the conventional method. Further, since it is heated by gas, it is possible to provide a useful apparatus and method for snow melting, which is easy to install and maintain.

[Brief description of drawings]

FIG. 1 is an explanatory view of a device outline showing an embodiment of the present invention.

FIG. 2 is a partial explanatory view of an installation state of the present invention.

FIG. 3 is an explanatory view of the operation of the present invention

FIG. 4 is an explanatory view of the operation of the present invention.

FIG. 5 is a sectional view of a heat storage tube of the present invention (F-F section)

FIG. 6 is a sectional view of a heat storage tube in another example of the present invention.

FIG. 7 is an illustration of a conventional device

[Explanation of symbols]

 1 Burner 2 Heat Dissipation Main Pipe 3 Branch Pipe (3a, 3b, 3c, 3d, 3e) 4 Branch Connection Pipe 5 Damper A 6 Damper B 7 Damper C 8 Blower 9 Control Box 10 Temperature Sensor 11 Snow Sensor 12 Switch 13 Slate Pipe 14 Heat Storage Material 15 Metal tube 20 Boiler 21 Hot water pipe 22 Controller 30 Road finishing material 31 Conrete 32 Heat insulating plate 33 Radiating pipe 34 Foundation roadbed

Claims (2)

[Claims] 1. A radiating pipe having a heat storage function, which is arranged and connected in a suitable shape at a snow melting point, has both ends opened to form an inflow part and an outflow part, a burner is connected to the inflow part, and an intermediate part of the radiating pipe is provided. Arrange and connect the blower in the proper place, and arrange the burner, the automatic opening and closing damper near the outflow part and the suction side of the blower respectively, and provide the temperature sensor that is placed in the proper place of the heating by the heat dissipation pipe. A control box with a control circuit for controlling the operation of the burner is used to control the burners, blowers and dampers described above based on the information from the temperature sensor, and the hot air generated by the burner ignition. A heat storage stage in which heat is stored inside the pipe while being discharged to the outside through a heat dissipation pipe, and a damper control after the burner is stopped It is in regenerative snow melting device configured to the circulating step of the tube circulating hot air can be selectively performed. 2. A heat storage tube having a hot air delivery means at its end and the other end open at a snow melting point,
An air blower is disposed in a proper place of the heat storage pipe, and a hot air blower is provided in the heat blower in the heat blower and a pipe opening / closing means is provided in the vicinity of the pipe open part and the suction part of the blower.
A heat storage stage in which the hot air blown into the pipe passes through the heat storage pipe and is discharged to the outside while storing heat in the pipe by controlling the pipe opening / closing means by a separate control circuit, and the blower device is driven after the hot air blowing means is stopped. A heat storage type snow melting method characterized by selectively performing a circulation stage for performing hot air circulation in a pipe.