JPH08136085A - Snow melting equipment - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a snow melting device that makes effective use of the heat of groundwater, is easy to newly install, and has a low running cost. [Configuration] The groundwater source 21 and the low temperature side inlet of the heat pump 45 are connected. High temperature side outlet of heat pump 45 and first heat exchanger
Connect the heating side inlets of 46. The heating side outlet of the first heat exchanger 46 and the heating side inlet of the second heat exchanger 47 are connected. The outlet on the heating side of the second heat exchanger 47 and the inlet on the high temperature side of the heat pump 45 are connected, and the outlet on the heat receiving side of the first heat exchanger 46 is connected to the inlet of the radiation pipe 27 provided in the non-sprinkling zone 14. To do. Radiator tube
The outlet of 27 and the heat receiving side outlet of the first heat exchanger 46 are connected. The heat receiving side inlet of the second heat exchanger 47 and the outlet of the water storage tank 32 are connected. The outlet of the water storage tank 32 and the heat receiving side outlet of the second heat exchanger 47 are connected.

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 roads and roofs.

[0002]

2. Description of the Related Art As shown in FIG. 2, a snow melting device of this type includes a pumping zone 101 and a sprinkling zone 102. A well 111 is provided in the pumping zone 101 and a well 111 is provided.
Is equipped with a pumping pump 112, a plurality of sprinkling nozzles 121 is installed in the sprinkling zone 102, and the sprinkling valve is provided in the sprinkling nozzle 121.
122 is provided, and the pumping pump 112 and the sprinkling nozzle 121 are connected by a water supply pipe 131, and the water supply pipe 131 has a check valve 132, a gate valve 133, a strainer 134 and a flow meter 135.
It is known that a water supply pipe 131 is provided and the water supply pipe 131 is opened to a drain tank 137 via a motor-operated valve 136 in the water sprinkling zone 102.

As another snow melting device, although not shown, an electric heating system is known in which a heating wire is buried in a snow melting zone and the heating wire is energized.

As another snow melting device, although not shown, there is known a hot water system in which a heat transfer tube is buried in a snow melting zone and hot water heated by a boiler is passed through the heat transfer tube.

[0005]

The sprinkler system is premised on the use of groundwater. Recently, due to problems such as land subsidence, excavation of wells to pump new groundwater is regulated in various places,
It is difficult to newly install a sprinkler type snow melting device.

In addition, the electric heating type and the hot water type are
There is a problem that the running cost is high.

An object of the present invention is to provide a snow melting device which is easy to newly install and has a low running cost. Further, the present invention may aim to easily install non-sprinkling snow melting and water sprinkling melting without increasing the pumping amount of existing groundwater.

[0008]

In the snow melting apparatus according to the present invention, a groundwater source and a low temperature side inlet of a heat pump are connected,
The high temperature side outlet of the heat pump is connected to the residual heat side inlet of the first heat exchanger, the heating side outlet of the first heat exchanger is connected to the heating side inlet of the second heat exchanger, and the heating side inlet of the second heat exchanger is connected. The heating side outlet is connected to the high temperature side inlet of the heat pump, the heat receiving side outlet of the first heat exchanger is connected to the radiating pipe inlet provided in the non-sprinkling zone, and the radiating pipe outlet and the first heat exchange are connected. The heat receiving side outlet of the vessel is connected, the heat receiving side inlet of the second heat exchanger and the outlet of the water tank are connected, and the water reservoir outlet and the heat receiving side outlet of the second heat exchanger are connected.

Further, it is preferable that the low temperature side outlet of the heat pump and the water storage tank are connected. Further, it is preferable that the water storage tank and the water spray nozzle provided in the water spray zone are connected, and that the water spray recovery tank is provided.

Further, it is preferable that the recovery tank and the water storage tank are connected, and a strainer is provided between the recovery tank and the water storage tank.

[0011]

In the snow melting device according to the present invention, the groundwater source is connected to the low temperature side inlet of the heat pump, the high temperature side outlet of the heat pump is connected to the residual heat side inlet of the first heat exchanger, and the heat supplying side of the first heat exchanger is connected. Since the outlet and the heating side inlet of the second heat exchanger are connected, and the heating side outlet of the second heat exchanger and the high temperature side inlet of the heat pump are connected, the first heat exchanger and The water flowing on the heating side of the second heat exchanger is heated and raised in temperature. The heat pump can use the heat of the driving heat source in addition to the absorbed heat of groundwater.

Further, since the low temperature side outlet of the heat pump is connected to the water storage tank, the water used for the heat pump is stored in the water storage tank.

Further, the heat receiving side outlet of the first heat exchanger and the heat radiating pipe inlet provided in the non-sprinkling zone are connected, and the heat radiating pipe outlet and the heat receiving side outlet of the first heat exchanger are connected. The water flowing through the heat receiving side of the first heat exchanger and the water flowing through the heat radiating pipe are heat-exchanged with each other, so that the water flowing through the heat radiating pipe is heated and heated.

Further, the heat receiving side inlet of the second heat exchanger and the outlet of the water storage tank are connected, and the outlet of the water storing tank and the heat receiving side outlet of the second heat exchanger are connected. The water flowing in the heat receiving side and the water in the water storage tank are heat-exchanged with each other to heat and raise the temperature of the water in the water storage tank.

Further, when the water storage tank and the water spray nozzles provided in the water spray zone are connected and the water spray recovery tank is provided,
The heated water is sprinkled from the nozzle, and the sprinkled water is collected in the collection tank.

Further, when the recovery tank and the water storage tank are connected and a strainer is provided between the recovery tank and the water storage tank, the recovered water is filtered and returned to the water storage tank.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is applied in the case of expanding and adding an existing snow melting device will be described below with reference to the drawings.

The snow melting apparatus comprises an existing pumping equipment 11, an existing sprinkling snow melting zone 12, a new sprinkling snow melting zone 13 and a new non-sprinkling snow melting zone 14.

The existing pumping equipment 11 is provided with a pumping well 21 and a pumping pump 22 submerged in the groundwater of the pumping well 21.

The existing watering snow melting zone 12 is provided with a plurality of watering nozzles 23 and a sluice valve 24. This is
It is the same as that described in the section of the prior art.

The new water-sprinkling and snow-melting zone 13 is also provided with a plurality of water-spraying nozzles 25 and a sluice valve 26, like the existing water-spraying and snow-melting zone 12.

The new non-sprinkling snow melting zone 14 is provided with a plurality of heat radiating pipes 27 buried in the road, and an inlet header 28 and an outlet header 29 respectively provided at the inlet side end and the outlet side end thereof. ing. Inlet header 28 and outlet header
Gate valves 31 are provided at the entrances and exits of 29, respectively.

A mixing water storage tank 32 and a sprinkling recovery tank 33 are provided alongside the well 21. The water storage tank 32 is provided with a ceiling 34 in order to prevent a decrease in water temperature. The water storage tank 32 is divided into a heat source tank 35, a sprinkling tank 36, and an overflow tank 37. The heat source tank 35 has a heat source water pump 38, and the sprinkler tank 36 has a heat storage pump 41.
And a watering pump 42, respectively. Overflow tank
Therefore, the outside air is prevented from flowing into the water storage tank 32. Collection tank
33 is equipped with a recovered water pump 43 and a screen 44.

The snow melting device is equipped with an absorption heat pump 45, a first heat exchanger 46 and a second heat exchanger 47. The heat pump 45 uses water as a working medium and lithium bromide as an absorbent, and is for producing the first kind of hot water. A heat source pipe 48 for city gas, LPG, or oil is connected to the heat pump 45. Gate valve for heat source tube 48
49 are provided.

The pumping pump 22 and the heat source tank 35 are connected by a groundwater pipe 51. The groundwater pipe 51 has a check valve 52,
A gate valve 53, a strainer 54 and a flow meter 55 are provided. The low temperature side inlets of the heat source water pump 38 and the heat pump 45 are connected by the first feed groundwater circulation pipe 56. A check valve 57 and a sluice valve are provided on the first underground water circulation pipe 56 for feeding.
58 are provided. The low temperature side outlet of the heat pump 45 and the sprinkler tank 36 are connected by the first return groundwater circulation pipe 61. A sluice valve 62 is provided on the first return groundwater circulation pipe 61.

The high temperature side outlet of the heat pump 45 and the heating side inlet of the first heat exchanger 46 are connected by a first high temperature water circulation pipe 63. A sluice valve 65 is provided in the first high temperature water circulation pipe 63. The heating side outlet of the first heat exchanger 46 and the second heat exchanger 47
The heating-side inlet of is connected by the second high-temperature water circulation pipe 66. The heating side outlet of the second heat exchanger 47 and the high temperature side inlet of the heat pump 45 are connected by a third high temperature water circulation pipe 67. The third high temperature water circulation pipe 67 is provided with an expansion tank 68, a high temperature water circulation pump 69 and a sluice valve 70.

Heat receiving side outlet and inlet header of the first heat exchanger 46
28 are connected by a low-temperature water circulating pipe 71 for feeding. The low-temperature water circulation pipe 71 is provided with a low-temperature water circulation pump 72, and gate valves 73 and 74 are provided on both sides of the low-temperature water circulation pump 72 with the low-temperature water circulation pump 72 interposed therebetween. The outlet header 29 and the heat receiving side inlet of the first heat exchanger 46 are connected by a return low temperature water circulation pipe 75.
An expansion tank 76 and a sluice valve 77 are provided in the first return low-temperature water circulation pipe 75.

The heat storage pump 41 and the heat receiving side inlet of the second heat exchanger 47 are connected by a second feed groundwater circulation pipe 78. The second feed underground water circulation pipe 78 is provided with a check valve 81 and a gate valve 82. The heat receiving side inlet of the second heat exchanger 47 and the sprinkler tank 36 are connected by the second return groundwater circulation pipe 83.

The watering pump 42 and the existing watering nozzle 23 are water supply pipes.
Connected by 84. A check valve is provided on the water supply pipe 84.
85, a gate valve 86 and a flow meter 87 are provided. The water in the water supply pipe 84 when the watering is stopped is discharged to the drain tank 89 through the electric valve 88 in the existing watering snow melting zone 12 in order to prevent freezing in the pipe.

The water supply pipe 84 is provided with a branch pipe 91, which is connected to the new water spray nozzle 25. A sluice valve 92 is provided in the branch pipe 91. The water in the branch pipe 91 when the sprinkling is stopped is discharged to the drain tank 94 through the electric valve 93 in the new sprinkling snow melting zone 13 to prevent the pipe from freezing.

The recovered water pump 43 and the sprinkler tank 36 are connected by a recovered water pipe 95. The check valve 9 is attached to the recovery water pipe 95.
6. A gate valve 97 and a strainer 98 are provided.

The temperature of groundwater in the well 21 is generally 10 to 18 ° C. even in the middle of winter. The groundwater pumped up by the pumping pump 22 is sent to the heat source tank 35. The amount of groundwater pumped up is the same as that used in the existing sprinkling snow melting zone 12.

The groundwater in the heat source tank 35 is sent to the low temperature side of the heat pump 45 by the heat source water pump 38. The amount of groundwater sent to the heat pump 45 is not more than the pumping amount of the pumping pump 22. The surplus groundwater overflows and flows into the sprinkler tank 36. The heat pump 45 absorbs the temperature of the groundwater by about 5 ° C. and uses the heat source to raise the temperature of the hot water on the high temperature side to 30 to 45 ° C. The groundwater that has absorbed the heat by the heat pump 45 is returned to the sprinkler tank 36, and the temperature at this time is about 5 ° C. lower than the temperature of the groundwater.

The high-temperature water circulation pump 69 circulates the high-temperature water through the heating sides of the first heat exchanger 46 and the second heat exchanger 47.

When the low temperature water circulation pump 72 is operated, the first
The hot water on the heat receiving side that has been heat-exchanged with the heating side of the heat exchanger 46 is circulated through the radiating pipe 27. This melts the snow on the road. As the aqueous solution circulated in the radiating pipe 27, an antifreeze liquid is used in order to prevent freezing in the radiating pipe when the operation is stopped.

When the heat storage pump 41 is operated, the water in the sprinkler tank 36 is sent to the heat receiving side of the second heat exchanger 47, where heat is exchanged with the heat applying side to raise the temperature and disperse. Returned to the aquarium 36. The operation of the heat storage pump 41 is adjusted so that the temperature of the water in the sprinkler tank 41 does not fall below 8 ° C.

The water in the water spray tank 36 is sent to the existing water spray nozzle 23 and the new water spray nozzle 25 by the water spray pump 42 and sprayed on the road. As a result, the snow on the road is erased. The sprinkled water is collected in the collection tank 33 and
Therefore, large-scale waste such as mud and fallen leaves is removed. When the recovered water pump 43 is operated, the recovered water is returned from the recovery tank 33 to the sprinkler tank 36 after removing small dust and small stones by the strainer 98. By collecting the sprinkled water in this manner, it is possible to sprinkle water in the newly-installed snow-spraying zone 13 with the amount of water required in the existing water-sprinkling zone 12. Of course,
If the new snow-spraying zone 13 is not installed, the amount of water used in the existing snow-spraying zone 12 can be saved.

Although the absorption heat pump is used in the above description, a compression heat pump may be used instead of the absorption heat pump.

[0039]

According to the first aspect of the present invention, the heat received by the first heat exchanger is such that the water flowing on the heating sides of the first heat exchanger and the second heat exchanger is heated and raised by the heat of ground water. The water flowing through the heat radiating pipe and the water flowing through the heat radiating pipe are exchanged with each other to heat and raise the temperature of the water flowing through the heat radiating pipe. As a result, the water in the water storage tank is heated and raised in temperature, so that the water flowing through the radiating pipe and the water in the water storage tank can be effectively heated. Therefore, it is easy to install new equipment and the running cost is low. When using existing equipment,
It is not necessary to increase the pumping amount of existing groundwater.

According to the second aspect of the present invention, since the water used for the heat pump is stored in the water storage tank, the used water can be reused.

According to the third aspect of the invention, since the temperature-raised water is sprinkled from the nozzle, the water sprinkled from the nozzle can efficiently remove snow, and the sprinkled water is recovered. Since the water is collected in the tank, the collected water can be reused.

According to the fourth aspect of the invention, the recovered water is filtered and returned to the water storage tank, so that the recovered water can be sprayed again.

[Brief description of drawings]

FIG. 1 is a layout configuration diagram of a snow melting device according to the present invention.

FIG. 2 is a layout configuration diagram of a snow melting device showing a conventional example.

[Explanation of symbols]

 12 Existing water sprinkling zone 13 New water sprinkling zone 14 No water sprinkling zone 21 Well 23 Existing water sprinkling nozzle 24 Existing water sprinkling nozzle 32 Storage tank 33 Recovery tank 45 Heat pump 46 First heat exchanger 47 Second heat exchanger 98 Strainer

Claims (4)

[Claims] 1. The groundwater source 21 and the low temperature side inlet of the heat pump 45 are connected, the high temperature side outlet of the heat pump 45 and the heating side inlet of the first heat exchanger 46 are connected, and the heating of the first heat exchanger 46 is performed. The side outlet and the heating side inlet of the second heat exchanger 47 are connected,
The heating side outlet of the heat exchanger 47 and the high temperature side inlet of the heat pump 45 are connected, the heat receiving side outlet of the first heat exchanger 46 and the inlet of the radiating pipe 27 provided in the non-sprinkling zone 14 are connected, The outlet of the heat radiating pipe 27 is connected to the heat receiving side outlet of the first heat exchanger 46, the heat receiving side inlet of the second heat exchanger 47 is connected to the outlet of the water storage tank 32, and the outlet of the water storage tank 32 is connected to the second heat exchange. A snow melting device to which the heat receiving side outlet of vessel 47 is connected. 2. The low temperature side outlet of the heat pump 45 and the water storage tank 32.
The snow melting apparatus according to claim 1, wherein the snow melting apparatus is connected to the snow melting apparatus. 3. The snow melting apparatus according to claim 1, wherein the water storage tank 32 and the water spray nozzles 23, 25 provided in the water spray zones 12, 13 are connected to each other, and a water spray recovery tank 33 is provided. 4. The recovery tank 33 and the water storage tank 32 are connected to each other,
The snow melting apparatus according to claim 3, wherein a strainer 98 is provided between 33 and the water storage tank 32.