JP2003301406A - Road-surface snow-melting device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a road-surface snow-melting device in which large-scale installation works are made unnecessary and an construction cost is also reduced. <P>SOLUTION: A heat exchanger 1 circulating an antifreezing solution L for collecting heat is installed in an existing reservoir W while a radiating pipe 2 circulating the antifreezing solution N for a heat dissipation is buried just under a road surface R. Heat is collected from water in the reservoir W by the heat exchanger 1, the temperature of the heat is increased by a heat pump 3, and heat is dissipated by the radiating pipe 2 and snow on the road surface R is melted. The heat exchanger 1 is constituted of a pipe made of a synthetic resin, and can be formed in a loop type wound in a coil spring shape. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to melting snow accumulated on road surfaces such as roads and sidewalks by using heat of water stored in existing existing reservoirs (ponds, reservoirs, dam lakes, etc.). The present invention relates to a snow melting device.

[0002]

2. Description of the Related Art Conventionally, snow plows and shovels are generally used to remove snow accumulated on road surfaces such as roads and sidewalks. However, since it requires a great deal of human power to remove snow by such means, in recent years, means for melting snow by utilizing the underground heat existing in the ground have been devised.

[0003]

[Problems to be Solved by the Invention] When snow is melted by utilizing underground heat, there is a great advantage that it is convenient because it does not require human power. However, this means requires a large-scale construction in which a hole having a depth of 100 to 200 m is dug in the ground, and a rod-shaped heat exchanger is inserted and embedded in the hole, resulting in high installation cost.

The present invention was devised in view of these points, and an object thereof is to provide a road surface snow melting device which does not require large-scale installation work and is inexpensive in installation cost.

[0005]

Means for Solving the Problems An explanation will be given with reference to FIGS. 1 and 2. In the road surface snow melting apparatus according to the present invention, a heat exchanger 1 for circulating the antifreeze liquid L for heat collection is installed in an existing reservoir W, and a heat radiating pipe 2 for circulating the antifreeze liquid N for heat radiation is buried immediately below the road surface R. The heat is collected from the water in the reservoir W by the heat exchanger 1, the heat is raised by the heat pump 3, and then the heat is radiated by the heat radiating pipe 2 to melt the snow on the road surface R. The heat exchanger 1 may be a loop type that is made of a synthetic resin pipe and is wound in a coil spring shape.

[0006] In a reservoir W such as a pond or a reservoir in a cold region where snow melting is required, even if the surface of the reservoir W is covered with ice, the lower part is warmed by the underground heat, so the water temperature reaches around 5 ° C. . The present inventor has paid attention to these points and has come up with the present invention.

[0007]

1 and 2 show an embodiment of a road surface snow melting device according to the present invention. In this, a heat exchanger 1 that circulates the antifreeze liquid L for heat collection is installed in an existing reservoir (pond) W that has existed before, and a radiation pipe 2 that circulates the antifreeze liquid N for heat dissipation is buried immediately below the road surface R. is doing. Then, heat is taken from the water in the reservoir W by the heat exchanger 1, the temperature of the heat is raised by the heat pump 3, and then the heat is radiated by the heat radiating pipe 2 to melt the snow on the road surface R.

As the heat exchanger 1, a so-called loop heat exchanger in which a pipe made of hard polyethylene is wound in a coil spring shape is used, and a large contact area with water is set so that heat can be efficiently collected. ing. The heat exchanger 1 and the heat pump 3 are connected by the first circulation path 4, and the heat pump 3 and the radiation pipe 2 are connected by the second circulation path 5. Both the first circulation path 4 and the second circulation path 5 have an antifreeze liquid L for heat collection.
And a circulation pump 6 for circulating the heat-dissipating antifreeze liquid N
Is installed. The heat pump 3 incorporates an evaporator 3a, a compressor 3b, a condenser 3c and an expansion valve 3d to form a closed circuit, and the refrigerant M is circulated in the closed circuit.

The operation of the road surface snow melting apparatus according to this embodiment will be described. First, the circulation pump 6 is operated. As a result, the heat-collecting antifreeze liquid L in the first circulation path 4 circulates in the heat exchanger 1 installed in the reservoir W, collects heat of the water in the meantime, and reaches the heat pump 3.

In the heat pump 3, the refrigerant M absorbs the heat of the antifreezing liquid L for heat collection and its temperature rises. Refrigerant M whose temperature has risen
Is compressed by the compressor 3b to become a high-temperature liquid, and the condenser 3
Enter c. The refrigerant M that has entered the condenser 3c is the second circulation path 5
The heat is taken away by the heat-dissipating antifreeze liquid N that circulates in the air and the temperature drops. The pressure of the refrigerant M whose temperature has dropped is lowered by the expansion valve 3d, and the temperature of the refrigerant M further abruptly drops and reaches the lower portion of the evaporator 3a in a liquid state. Then, again, heat is taken from the antifreeze liquid L for collecting heat in the first circulation path 4, and the previous process is repeated.

On the other hand, the heat-dissipating antifreeze liquid N in the second circulation path 5 which has absorbed the heat of the refrigerant M in the heat pump 3 circulates and reaches the heat dissipation pipe 2 which is buried immediately below the road surface R, and dissipates the heat there and then the road surface R. Melts the snow. After that, the process of absorbing heat in the heat pump 3 again and then radiating the heat in the heat radiating pipe 2 is repeated to continuously melt the snow.

Since this road surface snow melting apparatus can collect heat only by installing the heat exchanger 1 in the existing reservoir W,
The equipment is simple and does not require large-scale construction. Therefore, the installation cost can be kept low. Further, since natural energy such as heat of the water in the reservoir W is used, the operating cost is low, and it is safe and does not cause environmental problems such as air pollution.

Further, by constructing the heat exchanger with a synthetic resin pipe, the facility can be simplified and the handling thereof is facilitated, so that the installation cost can be further reduced. Furthermore, since the contact area with water can be increased by making the heat exchanger a loop type, the heat collection efficiency can be improved.

The road surface snow melting apparatus according to the present invention is mainly used for snow melting on the road surface R, but it can also be used for snow melting on the roof by installing the heat radiating pipe 2 on the roof of the building.

The heat pump 3 and the circulation pump 6 are
In addition to the commercial power source, it can be operated by a solar thermal power generation device or an internal combustion engine power generation device. The solar power generator is shown in Figure 3.
As shown in FIG. 3, the solar panel 7 absorbs sunlight, the storage battery 10 in the storage battery box 8 stores the electricity through the control board 9 that operates when charging is required, and the controller 11 circulates the required amount of electric power with the heat pump 3. Supply to the pump 6.

[0016]

EFFECTS OF THE INVENTION The road surface snow melting apparatus according to the present invention can collect heat only by installing the heat exchanger 1 in the existing reservoir W, so that the equipment is simple and large-scale construction is not required. Therefore, the installation cost can be kept low. Further, since natural energy such as heat of the water in the reservoir W is used, the operating cost is low, and it is safe and does not cause environmental problems such as air pollution.

Further, by constructing the heat exchanger with a synthetic resin pipe, a simpler facility can be provided,
The installation cost can be reduced. Furthermore, by making the heat exchanger a loop type, the contact area with water can be increased, the heat collection efficiency can be increased, and effective snow melting can be performed.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing an embodiment of the present invention.

FIG. 2 is a configuration diagram showing a heat pump portion in the embodiment of the present invention.

FIG. 3 is a flowchart of a solar thermal power generator that operates a heat pump or the like of the snow melting device according to the present invention.

[Explanation of symbols]

1 heat exchanger 2 Radiant pipe 3 heat pump 3a evaporator 3b compressor 3c condenser 3d expansion valve 4 First circuit 5 Second circuit 6 circulation pumps 7 solar panels 8 storage battery box 9 Control board 10 storage battery 11 controller W Reservoir R road surface L Antifreeze for heat collection M refrigerant N Antifreeze for heat dissipation

Claims (2)

[Claims] 1. A heat exchanger (1) for circulating an antifreeze liquid (L) for heat collection is installed in an existing reservoir (W), and
A heat radiating pipe (2) for circulating a heat radiating antifreeze liquid (N) is buried just below the road surface (R), heat is taken from the water in the reservoir (W) by the heat exchanger (1), and the heat is transferred to a heat pump. A road surface snow melting device obtained by melting the snow on the road surface (R) by radiating heat in the heat dissipation pipe (2) after the temperature is raised in (3). 2. The road surface snow melting device according to claim 1, wherein the heat exchanger (1) is formed of a synthetic resin pipe and is of a loop type wound in a coil spring shape.