JPS58148351A - Underground heat exchanging apparatus - Google Patents

Abstract

PURPOSE:To extend the heat accumulating zone of a heat exchanging apparatus utilizing the underground soil as a heat accumulating section and to thereby obtain a sufficient cooling and heating effect, by utilizing heat pipes in combination with the heat exchanging apparatus. CONSTITUTION:In summer, high-temperature air in a room to be air-conditioned is carried into an outer pipe 1 from an outer pipe duct 3 and cooled through heat exchanging with the soil around the outer pipe 1, and the air thus cooled is issued into the room via an inner pipe 2 and an inner pipe duct 4. Here, first and second heat pipes 7, 8 are disposed around the outer pipe 1, so that the heat transmitted from the high-temperature air is conveyed in the heat pipes 7, 8 as shown by arrows A in the drawing and scattered into the ground. In winter, on the other hand, low-temperature air in the room is carried into the inner pipe 2 from the inner pipe duct 4, and after the direction of the air flow is inverted at the top of the inner pipe 2, is carried upward through the outer pipe 1. In this manner, the low-temperature air is heated through heat exchanging with the soil around the outer pipe 1, and then the heated air is supplied into the room from the outer pipe duct 3. Here, the cold tramsmitted from the low-temperature air is conveyed in the heat pipes 7, 8 as shown by arrows B in the drawing and scattered into the ground.

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 area to cool the air in the summer and raise the temperature in the winter. As shown in Fig. 1, this type of underground heat exchange device consists of an outer tube 1 and an inner tube 2, which are driven vertically into the ground, and are attached to the upper ends of the outer tube 1 and the inner tube 2, respectively. Telescopic duct with an opening in the room 3. There are seasons.

Then, indoor air is sent into the inner pipe 2 through the duct 4, and is reversed at its tip to rise inside the outer pipe l, and is blown out into the room from the duct 8, and in the process, the outer pipe l
Heat exchange is performed with the outer soil (heat storage zone) 5. Since soil has a large heat capacity and poor thermal conductivity, it can be used as a heat storage zone, but its usable area is limited to the outer circumference of the outer tube. Therefore, during heat exchange,
A problem has arisen in that the energy absorbed by heat exchange (hot heat in summer and cold heat in winter) tends to reach a saturated state or a state close to it, making it impossible to obtain sufficient cooling and temperature raising effects.

Therefore, in order to expand the heat storage zone 5 (No. 119), it is necessary to lengthen the outer tube 1 and the inner tube 2, increase the number of them, or add fins 6 to the outer tube 1 as shown in FIG. was considered. However, outer tube l and inner tube 2
Increasing the length or increasing the number of fins will make construction difficult, and even if fins 6 are attached to the outer tube 1 as described above, in order to prevent damage, the area shown by the dotted line in Figure 2 must be excavated and buried. This resulted in the problem of difficult construction and high cost.

This idea was devised in view of these circumstances, and consists of a heat exchange body that is installed underground and has an air supply passage and an exhaust passage that communicate with each other, and a heat exchange body that has one end connected to the body. The gist of this is an underground heat exchange device equipped with a heat pipe that is installed in the ground at an angle, with the other end in contact with the body and the other end separated.

In other words, this device is equipped with a heat pipe, and the heat storage zone expands due to the action of the heat pipe.
Sufficient cooling and temperature raising effects can be obtained without causing the above-mentioned problems.Next, the present invention will be explained in detail based on examples.

FIG. 8 is a block diagram of an embodiment of the present invention.

In the figure, l is an outer pipe driven into the ground, 2 is an inner pipe, and 7
8 is a first heat pipe arranged at an angle so that one end touches the lower end of the outer tube l and the other end faces upward; 8 indicates a first heat pipe whose one end touches the upper end of the outer tube l and the other end faces downward; and the intermediate part thereof. This is a second heat pipe that intersects the first heat pipe 7 in a close manner. The first and second heat pipes 7.8 are installed in sets of two by hammering, and are arranged so that their intersections are as close to each other as possible.

Reference numeral 4 indicates an inner pipe duct whose upper end opens into the room, and reference numeral 8 indicates an outer pipe duct whose upper end opens into the room.

In this configuration, in the summer, as shown in FIG.
The outer tube 1 is cooled by exchanging heat with the soil on the outer periphery, and in that state is blown into the room through the inner tube 2 and the inner tube duct 4. In this case, first and second heat pipes 7.8 are arranged on the outer periphery of the outer tube l as shown in the figure, and the heat transferred from the high temperature air flows through the heat pipes 7.8 as indicated by the arrows.
Because heat pipes (7.8) move only upwards, the heat is diffused into the ground. In this way, since the heat transferred from the high-temperature air is transferred by the heat pipe 7.8, the heat transfer becomes faster and the heat exchange efficiency increases. The soil will also be used as a heat storage zone (the shaded area) and will grow. Therefore, the heat storage zone described above is added to the existing heat storage zone, and the entire heat storage zone becomes larger, making it difficult for the heat storage zone to become saturated. As a result, K is increased so that a sufficient cooling effect can be obtained in combination with rapid heat transfer.

In the winter, as shown in Fig. 5, indoor low-temperature air is sent from the inner pipe duct 4 into the inner pipe 2, reversed at the tip of the inner pipe 2, and raised inside the outer pipe l, where the air flows through the outer pipe l. It exchanges heat with the soil on the outer periphery to raise the temperature, and blows it out from the outer pipe duct 8 into the room. In this case, the cold heat transferred from the low-temperature air moves through the heat pipe 7.8 as shown by arrow B.
8 only transmits cold and heat downward), so it spreads underground.

As a result, the transfer of cold heat becomes faster and heat exchange efficiency improves, and the heat transfer rate increases. , 8 becomes a heat storage zone for cold heat and the heat storage zone expands, so that a sufficient temperature raising effect can be obtained.

In the above explanation, the air inlet is changed in summer and winter, but this is mainly for the purpose of comfortably air conditioning the room, and it is not necessary to change the air inlet. Further, the number of heat nozzles 7.8 can be freely changed. Furthermore, one end of the heat pipe 7.8 may be somewhat distant from the outer tube l. In this way, in the present invention, a state in which one end of the heat pipe 7.8 is somewhat separated from the outer tube 1 is also included in the contact state.

As described above, the underground heat exchange device of the present invention has an air supply path and an exhaust path that are in communication with each other, and a heat exchange body disposed underground. Since it is equipped with a heat pipe that is installed in the ground at an angle with the other end in contact with the body and the other end is away, the heat storage zone becomes wider due to the action of heat nozzles. Sufficient cooling without complicated work such as attaching fins to the tube.

It becomes possible to obtain a temperature raising effect.

[Brief explanation of the drawing]

1 and 2 are explanatory diagrams of a conventional example, FIG. 8 is a configuration diagram of an embodiment of the present invention, and FIGS. 4 and 5 are explanatory diagrams of its operation.・l...outer tube 2...
Inner pipe 8... Outer pipe duct 4... Inner pipe duct 5.
...Heat storage zone 6...Fin 7.8...Heat pipe Patent applicant Matsushita Electric Works Co., Ltd. Agent Patent attorney Takehiko Matsumoto 223- Figure 5

Claims (2)

[Claims] (1) A heat exchange body that is installed underground and has an air supply passage and an exhaust passage that communicate with each other, and one end that is in contact with this heat exchange body and the other end that is separated from the body for deworming. A geothermal heat exchange device with heat pipes installed at an angle. (2) A set of two heat pipes is constructed, and one heat pipe is arranged with one end in contact with the lower end of the heat exchanger body and the other end is tilted upward, and the other heat pipe The underground heat exchanger according to claim 1, wherein the underground heat exchanger is arranged at an angle with one end in contact with the upper end of the heat exchanger body and the other end facing downward and close to the one heat pipe at an intermediate portion thereof. Device.