JPH061606Y2 - Underground heat exchanger - Google Patents

Description

Detailed Description of the Invention A. Purpose of device a. Industrial Application Field This proposal relates to an underground heat exchange device.

b. Conventional technology and its problems In this type of equipment that has been provided so far, it is a method of pumping groundwater and melting snow on the road, but with this, there is a fear of groundwater depletion, The amount of heat supplied is so small that a large amount of snow cannot be melted, and even if the snow melts, it freezes immediately and does not fit the actual conditions of the extremely cold regions. Also,
No consideration is given to the flow phenomenon on the pavement surface in the summer.

B. Configuration of the Invention a Means for Solving the Problem The present application is intended to solve the above-mentioned problems by the following configurations.

That is, the one of the present application is the side wall 2
In the parent well 2 where a proper number of groundwater reduction strainers 2A1 are provided below A, a subterranean heat exchange device main body is provided in which a multi-tube groundwater heat exchange pipe 4A is arranged in a meandering manner. An antifreeze solution is configured to circulate through the underground heat exchanger main body and a road surface snow melting pipe, and groundwater is supplied into the parent well 2 from a child well 6 dug in the vicinity of the parent well 2. It is the underground heat exchanger.

b. Example 1 of the invention is an underground heat exchange device.

Reference numeral 2 is a parent well in which the main body of the underground heat exchange device is installed.

The parent well 2 is composed of a subsurface side wall 2A of the underground heat supply underground return well, a bottom portion 2B stretched above and below the side wall 2A, and a top plate 2C, and this is buried in the ground G with a predetermined depth. .

An appropriate number of groundwater reduction strainers 2A1 are provided below the side wall 2A of the underground heat supply underground reduction well.

Reference numeral 3 indicates a pipe for snow melting on the road, which is buried in a road surface (paved surface) 3A in a meandering manner, 3B indicates an inlet pipe, and 3C indicates an outlet pipe.

Reference numeral 4 denotes a main body of the first type multi-tube underground heat exchange device arranged in the parent well 2, which is composed of a multi-tube groundwater heat exchange pipe 4A meandering in the parent well 2 and has one end It is connected to the inlet pipe 3B and the other end is connected to the outlet pipe 3C.

Reference numeral 5 is a groundwater pipe for supplying groundwater into the parent well 2,
Of course, the groundwater outlet pipe 5A at the tip is pulled into the parent well 2. Pipe 5B for groundwater inlet at the other end
Is drawn into the child well 6 dug in the vicinity of the parent well 2, and a groundwater pressure submersible pump 5C is connected to the tip thereof.

In this case, an ordinary pump may be used as is known.

6A is a groundwater suction strainer.

Reference numeral 7 is a main body of a double pipe storage type underground heat exchange device of the second type arranged in the parent well 2 and is drawn into the outer groundwater heat exchange casing 7A and the groundwater heat exchange casing 7A. The double pipe heat exchange promoting casing 7B is formed, and the snow melting antifreeze inlet 7B1 at the lower end of the double pipe heat exchange promoting casing 7B is opened, and heat is exchanged in the double pipe heat exchange promoting casing 7B. The antifreeze liquid pressure feeding pipe 7C is drawn in, and the antifreeze liquid pressure feeding submersible pump 7D is connected to the lower end thereof.

The heat exchange antifreeze pumping pipe 7C is connected to the inlet pipe 3B in the road snow melting pipe, and the return pipe 7E connected to the outlet pipe 3C is drawn into the groundwater heat exchange casing 7A on the outside. There is.

Reference numeral 8 is a main body of a third type multi-tube storage composite type underground heat exchange device arranged in the well, and a multi-tube type at one end of the multi-tube groundwater heat exchange pipe 8A that meanders in the parent well 2. Groundwater heat exchange pipe inlet 8A1 to the outside groundwater heat exchange casing 8
The outlet of the multi-pipe type groundwater heat exchange pipe 8A2 at the other end is made to communicate with the inside of the double pipe heat exchange antifreeze storage tank 8C.

8D is a heat exchange antifreeze pipe drawn into the double pipe heat exchange antifreeze storage tank 8C, an antifreeze liquid pressure submersible pump 8E is connected to the lower end, and an upper end is connected to the inlet pipe 3B of the road snow melting pipe. The return pipe 8F connected to the outlet pipe 3C is drawn into the outer groundwater heat exchange casing 8B.

This is a combination of a multi-tube type (radiator) structure and a storage type structure, but with the multi-tube type (radiator) structure having a high heat exchange rate of the antifreeze liquid, which is a heat exchange liquid, installed in the groundwater. The upper part is the main body of the above-mentioned multi-tube storage type underground heat exchange device with an antifreeze liquid pressure pump installed inside, which increases the heat exchange rate by circulating and storing the heat exchange liquid, and injects groundwater from the sub-well into the parent well. Reduction Strainer returns to the ground.

As a matter of course, the antifreeze liquid is circulated in the underground heat exchange device main body and the road surface snow melting pipe 3.

Here, the parent well will be described in detail.

Since the parent well has a built-in underground heat exchange device that can process the antifreeze liquid that is the heat exchange required for the road surface snow melting pipe 3, the rate of underground temperature rise (an average of about 3 ° C for every 100m deep underground) It has a caliber and depth that can secure the required capacity, that is, the heat exchange liquid (antifreeze liquid) necessary for melting snow. If a large amount of snowmelt energy is not required for snowmelt in the winter season, install the groundwater reduction strainer of the parent well as low as possible.
The highest underground hot water in the parent well performs heat exchange with the heat exchange liquid inside the underground heat exchange device body,
The heat exchange liquid having a certain temperature capable of melting snow can be stored, and the purpose can be achieved.

If a large amount of snowmelt energy is required due to a large amount of snowmelt, a large amount of snowmelt will be melted by continuously pouring groundwater in appropriate amounts. In order to warm the body of the underground heat exchange device, the water is poured into the parent well to raise the heat exchange liquid to the temperature at which snow can be melted and to store the required capacity.

Spent groundwater is returned to the ground through the groundwater reduction strainer in the parent well.

In the summer, even if the temperature of the heat exchange liquid that absorbs and circulates the solar heat from the pavement surface is increased by the road surface snow-melting pipe 3, the flow phenomenon of the pavement surface can be suppressed without problem by cooling with groundwater. Spent groundwater is returned to the ground through the groundwater reduction strainer in the parent well.

c. Action Ground water that artificially functions as heating water or cooling water is supplied from the child well to the parent well by an appropriate amount,
During the winter season, the antifreeze liquid cooled by the snow melting on the road surface is raised to a snow melting temperature by the underground heat exchange device body.

With the above functions, the groundwater (drainage) whose temperature has dropped is returned to the ground from the underground return strainer of the parent well.

In the summer, heat is absorbed from the fluidized pavement surface to maintain a normal pavement surface.Therefore, the ground water of the sub-well that has been warmed is returned to the ground water of the parent well by the cooling liquid cooled by the underground heat exchange device body. Return to the ground from the strainer.

C. Effect of the invention a. Since the main well 2 has a built-in underground heat exchanger, If there is any accident in the body of the underground heat exchanger, it can be rearranged so that it can be pulled up and the cause of the accident can be examined.

B. When the capacity of the parent well as the reduction well is lowered, the underground well can be regenerated as an efficient reduction well by pulling up the body of the geothermal heat exchanger and cleaning the parent well.

In this way, the capabilities of the well portion and the underground heat exchange device main body portion can be exhibited individually.

b. Underground heat exchange device To warm and cool the main ground, inject groundwater from the sub-well into the parent well, and return used wastewater and groundwater to the groundwater reduction strainer ground in the parent well. As a result, a. Since the groundwater injected into the parent well can be returned from the child well, no sewage system is required.

B. Since the groundwater pumped from the child well is returned to the ground from the parent well, there is no concern about ground subsidence due to groundwater depletion.

C. Because there is no cause of pollution between the parent and child wells, it does not pollute the groundwater.

D. Both the parent and child wells can reduce the groundwater without exposing it to the air, so the oxidation of the groundwater can be stopped and the natural environment can be maintained.

E. In the multi-tube storage composite type underground heat exchanger main body 8,
Since a structure in which the heat exchange liquid is circulated through a main part of the underground heat exchange device main body with a thin pipe or the like, a parent well with a small diameter can be obtained.

Instead of the antifreeze liquid, a structure that performs a so-called heat pipe action using CFC gas, alcohol, or the like may be used. In this case, the submersible pump is not necessary, but it is natural to make appropriate design changes such as the need for an atmospheric pressure pump for sending vaporized substances.

[Brief description of drawings]

 FIG. 1 is a perspective view of the whole with a part cut away, FIG. 2 is a longitudinal sectional view, and FIGS. 3 and 4 are longitudinal sectional views of another embodiment. DESCRIPTION OF SYMBOLS 1 ... Underground heat exchange device 2 ... Parent well 3 ... Road snow melting piping 4 ... Multi-tube underground heat exchange device body 6 ... Child well 7 ... Double pipe storage-type underground heat exchange device body 8 ... Multi pipe Storage composite type underground heat exchanger main unit.

Claims (3)

[Scope of utility model registration request] 1. A multi-tube groundwater heat exchange pipe 4A is arranged in a meandering manner in a parent well 2 in which an appropriate number of groundwater reduction strainers 2A1 are provided below a side wall 2A of an underground heat supply underground reduction well. The main body of the multitubular underground heat exchange device is provided, and the antifreeze liquid is circulated through the main body of the multitubular underground heat exchange device and the pipe for snow melting on the road surface. An underground heat exchange device characterized in that ground water is supplied from a child well 6 dug in the vicinity of the parent well 2. 2. The main body of the multitubular underground heat exchange device comprises an outer groundwater heat exchange casing 7A and a double pipe heat exchange promotion casing 7B drawn into the groundwater heat exchange casing 7A. This double tube heat exchange promoting casing 7
The snow-melting antifreeze inlet 7B1 at the lower end of B is opened, the heat exchange antifreeze pumping pipe 7C is drawn into the double pipe heat exchange promoting casing 7B, and the antifreeze pumping submersible pump 7D is connected to the lower end thereof. The heat exchange antifreeze pumping pipe 7C is connected to the inlet pipe 3B of the road snow melting pipe, and the return pipe 7 is connected to the outlet pipe 3C.
E is drawn into the outer groundwater heat exchange casing 7A, and the antifreeze liquid pumping water pump 7D is operated to circulate and melt the antifreeze liquid. In the parent well 2, groundwater is extracted from the child well 6 dug in the vicinity of the parent well 2. The underground heat exchange device according to claim 1, wherein the underground heat exchange device is configured to supply heat. 3. The main body of the multitubular underground heat exchanger is a multitubular groundwater heat exchange pipe 8A in which the main well 2 is meandered.
The multi-tube groundwater heat exchange pipe inlet 8A1 at one end of is connected to the outer groundwater heat exchange casing 8B, and the multitubular groundwater heat exchange pipe outlet 8A2 at the other end is placed in the double-tube heat exchange antifreeze storage tank 8C. In addition to being communicated,
The lower end of the heat exchange antifreeze pipe 8D drawn into the groundwater heat exchange casing 8B is connected to the antifreeze liquid pressure submersible pump 8E, the upper end is connected to the inlet pipe 3B in the road snow melting pipe, and the outlet pipe 3C. The connected return pipe 8F enters the outer groundwater heat exchange casing 8B,
Further, the underground heat exchange device according to claim 1, wherein the utility model registration is drawn into the multitubular groundwater heat exchange pipe 8A from the multitubular groundwater heat exchange pipe inlet 8A1.