JPS58148350A - Underground heat exchanging apparatus - Google Patents

Abstract

PURPOSE:To solve the problem of insufficient cooling or heating at the end of summer or winter, by disposing two heat exchanging apparatus utilizing the underground soil as a heat accumulating section, and passing air through the heat exchanging apparatus in the manner that the direction of air flow in summer is opposite to that in winter. CONSTITUTION:A first and a second outer pipes 4, 5 are erected in the ground in a side-by-side relationship, and a first and a second inner pipes 6, 7 are connected at the upper end 8. In summer, air is introduced from an air intake- discharge duct 9 into the first outer pipe 4 as shown by the solid-line arrows in the drawing and cooled through heat exchanging with the soil around the pipe 4. Then, air is carried into the second outer pipe 5 via the first inner pipe 6, connecting pipe 8 and the second inner pipe 7, and after it is cooled through heat exchanging with the soil around the second outer pipe 5, is issued into a room to be air-conditioned from a second air intake-discharge duct 10. In winter, on the other hand, air is passed reversely as shown by the broken-line arrows in the drawing, and air being heated through heat exchanging is supplied into the room to be air-conditioned from the first air intake-discharge duct 9.

Description

[Detailed description of the invention] This invention relates to underground heat exchange equipment.

A geothermal heat exchange device uses the ground underground as a heat storage unit to cool the air in the summer and raise the temperature in the winter before taking it out. As shown in Fig. 1, this type of underground heat exchange device is composed of an outer tube 1 and an inner tube 2, and is driven vertically into the ground, and air is sent into the outer tube 1. 1 The heat is exchanged with the soil around the outer periphery, and the air is blown out from the inner pipe 2 through the inner pipe duct 8 into the room. This underground heat exchange device uses the same part of the soil, that is, the soil around the outside of the outer tube, as a heat storage zone in both summer and winter. They have the disadvantage that too much hot or cold heat accumulates, causing the temperature to rise or fall too much, making it impossible to obtain sufficient cooling or temperature-raising effects.

This invention was made in view of the above circumstances, and includes first and second outer pipes that are installed in parallel in an upright state underground, and an outer pipe that is located inside the first and second outer pipes at their lower ends. first and second inner tubes arranged in communication with the tube; a communication member that connects the first and second inner tubes at their upper ends and communicates the first and second inner tubes; and an air feeder. The gist thereof is a subterranean heat exchange device characterized in that it is equipped with a means for sending air through the first outer tube in the summer and through the second outer tube in the winter. be.

That is, by providing two outer tubes with an inner tube as described above and feeding from opposite directions in summer and winter,
This will solve the problems mentioned above.

Next, this invention will be explained in detail based on examples.

FIG. 2 is a block diagram of an embodiment of the present invention.

In the figure, 4 and 5 are the first structures installed in parallel underground.
and a second outer tube 6.7 includes first and second inner tubes inserted into the first and second outer tubes 4, 5 such that their lower ends communicate with the outer tubes 4, 5. It is. 8 is a communication pipe that connects the first and second inner tubes 6 and 7 at their upper ends, and communicates the first and second inner tubes 6 and 7; 9 is a first outer tube 4;
The supply/exhaust duct provided at the upper end of the outer tube 5 is a supply/exhaust duct provided at the -E end of the second outer tube 5.

In this configuration, during the summer, air is sent into the first outer tube 4 from the supply/exhaust duct 9 of the first outer tube 4 as shown by the solid line arrow, and exchanges heat with the soil on the outer periphery of the first outer tube 4. The first inner tube 6. Communication pipe 8 and second inner pipe 7
It reaches the inside of the second outer pipe 5, where it also exchanges heat with the soil around the outer periphery of the second outer pipe 5, cools it, and blows it out into the room from the second supply/exhaust duct 10. . In winter, contrary to the above, air is sent in as shown by the broken line arrow to exchange heat, and the heat-exchanged air (warm air) is taken out from the first supply/exhaust duct 9.

In this case, the first heat storage zone 11 on the outer periphery of the first outer tube 4 exhibits a temperature rise similar to the conventional example in the summer, but in the winter, air warmed by the second outer tube 5 passes through it. Therefore, the temperature drop is smaller than in the conventional example. For this reason,
The first heat storage zone 11 on the outer periphery of the first outer tube 4 gradually becomes hotter.

On the contrary, the second heat storage zone 12 on the outer periphery of the second outer tube 5 gradually becomes lower in temperature. Next, the temperature changes over a period of one year of the first heat storage zone ll and the second heat storage zone 12 are compared with the conventional example (first
Fig. 8 shows a comparison with that of the heat storage zone shown in Fig. 8). In the figure, the song iA is the temperature change curve of the first heat storage zone 11, the song gB is the temperature change curve of the second heat storage zone 12, and the curve C is the temperature change curve of the heat storage zone of the conventional example. As is clear from the figure, in summer, temperature changes -
By extracting air from the second heat storage zone 12 side with mB, it is possible to obtain air that is significantly cooler than in the conventional example. By taking out the air from the 11 side, it becomes possible to obtain air whose temperature is significantly higher than that of the conventional example. For example, if the outside temperature is 85°C,
In the conventional example, the temperature can only be lowered to 80'C, but with the device of the present invention, it can be lowered to 27°C.

Also, if the outside temperature is 10oC, in the conventional example the temperature is 15
Whereas the temperature can only rise to 18°C, this device can raise the temperature to 18°C.

In addition, in order to expand the heat storage zone by using not only the soil near the outer periphery of the outer tubes 4 and 5 for heat exchange, but also the soil at a distance from the outer periphery, as shown in Fig. 4. Fins 18a may be provided at appropriate intervals on the outer peripheral surface of the outer tube 1B. In FIG. 4, 14 is an inner tube, and 15 is a driving portion at the tip of the outer tube 18. This finned outer tube 18 is driven into the ground by fitting a large-diameter cylinder 16 (Fig. 5) that accommodates the finned outer tube 18 into the finned outer tube 18, and then inserting the tip of the cylinder into the outer tube. This is done by engaging the driving part at the tip and driving the large diameter cylinder 16 in this state as shown in FIG. After the driving is completed, the large diameter cylinder 16 is pulled out. As a result, earth pressure forces the soil between the fins taa of the outer tube 1B, resulting in the state shown in FIG.

As described above, the underground heat exchange device of the present invention includes: first and second outer tubes installed in parallel in an upright state; first and second inner tubes inserted in communication with the outer tube;
and a second inner tube connected at the upper end to the first and second inner tubes.
A communication member for communicating the inner tubes of and an air sending means are provided, and air is sent from the first outer tube in the summer and air is sent from the second outer tube in the winter,
Sufficient cooling and heating effects can now be obtained, eliminating the situation of insufficient cooling and insufficient heating, especially at the end of summer and at the end of winter.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of a conventional example, FIG. 2 is a configuration diagram of an embodiment of the present invention, and FIG. 8 is a temperature change curve diagram of the heat storage zone.
FIG. 4 is an explanatory diagram of the main part of another embodiment, and FIG. 5 is an explanatory diagram of 70-meter driving. 1.4, 5.1, 8... Outer tube 2, 6.7.14...
・Inner pipe 8...Communication pipe 9...First outer pipe feed・
Exhaust duct lO...Second outer tube feed/exhaust duct 11
．． 12... Heat storage zone 15... Driving part 16...
・Large diameter cylinder patent applicant Matsushita Electric Works Co., Ltd. Patent attorney Takehiko Matsumoto Figure 3℃ Figure 4 Figure 5

Claims (1)

[Claims] (1) The first and second structures installed in parallel underground
an outer tube, first and second inner tubes inserted into the first and second outer tubes at their lower ends in communication with the outer tubes, and the first and second inner tubes at their upper ends. It is provided with a communication member that connects the first and second inner tubes to communicate with each other, and an air feeding means, and in the summer, air is fed from the first outer tube, and in the winter, air is fed from the second outer tube. A geothermal heat exchange device characterized in that it sends K.