JPH07127924A - Air-conditioning method by use of underground heat - Google Patents

Abstract

PURPOSE:To provide an air-conditioning method wherein the cost of operation is lowered and energy-saving is attained, using natural underground heat. CONSTITUTION:A plurality of concrete pillars 2, in each of which a metallic tube 3 being helically coiled is put, are constructed in the earth, and intakes 3a and outlets 3b of the metallic tubes 3, which are opened on the earth, are progressively connected with each other in series. Air is introduced from the intake 3a of the metallic tube 3 in the first one of the concrete pillars 2 and is led to the inside of a room from the outlet 3b of the metallic tube 3 in the last pillar 2. In this process, the temperature of the air is turned much the same as the temperature in the earth.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an energy-saving heating / cooling method that uses air whose temperature is equal to the soil temperature for indoor heating / cooling of a building.

[0002]

2. Description of the Related Art There has been an attempt to use cold air under the floor for air conditioning in summer instead of an air conditioner which consumes a lot of power. In this case, the power for cooling is unnecessary,
Energy is saved because only the power for operating the fan for supplying air is needed.

[0003]

However, in the above-mentioned use of cold air under the floor, since the absolute amount of cold air is limited and the temperature rises as time passes, it is impossible to cool for a long time. Although the temperature is cold, the temperature is not sufficiently low, and the room temperature often does not drop to the desired temperature.

An object of the present invention is to provide a cooling and heating method for cooling or heating the interior of a room directly or supplementarily using natural cold and warm air.

[0005]

That is, according to the present invention, a concrete column in which a part of a continuous metal pipe excluding both ends thereof is buried is buried in soil, and air is introduced from an inlet end of one end of the metal pipe which opens to the ground. Is introduced, and air that has become substantially equal to the soil temperature from the outlet end of the other end is introduced into the room.

[0006]

According to the present invention, the average amount of hot outside air in summer is 15
After being cooled down to the temperature of soil in degrees, it is introduced indoors. The temperature of this air is low enough to lower the indoor temperature to a comfortable cooling temperature of 20 degrees Celsius. Furthermore, even in winter, when used as heating air that also serves as ventilation, the average temperature of 15 degrees in the soil is much higher than the outside temperature, so much warmer than using outside air as the ventilation source. Is less necessary. Therefore, this soil temperature air can be used as a heating and cooling source throughout the year.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In FIG. 1, reference numeral (1) indicates soil under the floor of a building. This building is illustrated as a wooden building, with a joist (7) on a concrete foundation (6) and pillars.
It is shown that (8) has been built and the floor (9) has been stretched.

Before building a building, a plurality of holes each having a diameter of 40 cm and a length of about 2 meters are bored in the ground below the floor (9). Inside this, a metal tube spirally wound
(3), preferably a copper tube, with its inlet end (3a) and outlet end (3
Concrete column (2) in which the one having b) at the upper end is inserted, and fresh concrete is filled and the metal pipe (3) is embedded integrally.
To form.

Metal pipe of such concrete pillar (2)
Connect the outlet end (3b) of (3) to the pipe (4) and the pipe end (4) to the inlet end (3a) of the metal pipe (3) of the adjacent concrete column.
Use (5) to connect sequentially. In this way, they are connected one after another to form a series of pipe lines.

The outlet side of this conduit is introduced into the interior of the building, and the inlet side introduces outside air or returning indoor circulation air from the outside or indoor circulation exhaust side. The air in this conduit is introduced into the room by a suitable fan device (not shown).

The air introduced from the inlet side of the pipeline passes through the metal pipe (3) spirally wound in the concrete column (2) buried in the soil, while the average annual temperature is about It exchanges heat with soil heat that is stable at 15 degrees. Therefore, even if the outside air that exceeds 30 degrees in the summer is introduced, it is cooled to substantially 15 degrees on the outlet side by the heat exchange with the soil heat, and it is possible to achieve effective cooling in the room. In this case, if the indoor circulation air is introduced by switching the inlet pipe, the temperature of the introduced air is lower than that of the outside air, which is advantageous in terms of thermal energy.

Even in winter, for example, when outside air below the freezing point is introduced from the inlet end of this pipeline to exchange heat with the soil heat, the outlet end is heated to about 15 degrees, so that it is used for ventilation. Can be effectively used as air. That is, in the winter,
Since the air in the room is contaminated by the use of a fan heater, etc., it is required to ventilate quite frequently. At this time, introducing cold outside air such as opening a window causes a considerable energy loss, but if the present invention exchanges heat with soil heat and ventilates with warmed fresh air, when the outside air is put in. Not only is it possible to avoid the sudden cold weather, but also the energy for heating the fan heater can be saved.

The diameter and length of the above-mentioned concrete pillar (2) can be arbitrarily changed. Also concrete pillars
The number of (2) can also be arbitrary according to the volume of the target room. Depending on the case, a plurality of series conduits may be provided. Further, although the concrete pillar (2) has been described as cast-in-place concrete, factory-made concrete pillar may be buried in some cases.

FIG. 2 shows a modification in which the above-mentioned concrete pillar (2) is integrally formed with the foundation (6) of the building.
In this case, the concrete columns (2) function as foundation piles, which is extremely advantageous in terms of the structure of the building. In addition,
In this modification, the building is illustrated as a wooden construction, but it is more advantageous for a reinforced concrete construction or a steel construction.

In addition to the above-described embodiment, the present invention can be modified in many ways, for example, a large part or at least a part of a concrete column of a metal tube is formed in a meandering shape.

[0016]

According to the present invention, since a cold heat source of about 15 ° C. per year in soil is used for cooling, electric power is required only for the fan operation, and the operating cost is greatly reduced. Further, it can be used not only for cooling but also as a heating source for winter or a planned ventilation source for a year.

Further, if it is constructed under the foundation of the building, it can act as a foundation pile very effectively (the invention of claim 3).

Furthermore, when combined with the original cooling / heating device and used as an auxiliary cooling medium source, the operating cost of the cooling / heating device can be significantly reduced.

[Brief description of drawings]

FIG. 1 is a conceptual sectional view of a first embodiment of the present invention.

FIG. 2 is a conceptual partial cross-sectional view of a second embodiment of the present invention.

[Explanation of symbols]

 (1) Soil (2) Concrete pillar (3) Metal pipe (3a) Inlet end (3b) Outlet end (4) Piping (5) Pipe joint (6) Concrete foundation (7) Joist (8) Pillar (9) Floor

Claims (8)

[Claims] 1. A concrete column in which a part of a continuous metal pipe except for both ends thereof is buried, is buried in soil, and air is introduced from an inlet end of one end of the metal pipe opening above the ground, and an outlet end of the other end. A method for cooling and heating by utilizing underground heat, characterized in that air having a temperature substantially equal to the soil temperature is introduced into the room. 2. A plurality of concrete columns in which a portion of a continuous metal pipe excluding both ends thereof is buried, are embedded in the mainland, and an inlet end and an outlet end of the metal pipe, which are open to the ground, are sequentially connected in series. Utilization of soil heat by introducing air from the inlet end of the metal pipe of the concrete column and guiding air into the room that has become substantially equal to the soil temperature from the outlet end of the metal pipe of the last concrete column Air conditioning method. 3. The heating / cooling method according to claim 1, wherein at least a part of the concrete column of the metal tube has a spiral shape. 4. The heating and cooling method according to claim 1 or 2, wherein at least a part of the concrete column of the metal tube has a meandering shape. 5. The cooling and heating method according to claim 1, wherein the concrete pillar is buried in the soil under the floor of the building. 6. The cooling and heating method according to claim 1, wherein the concrete column is arranged under the foundation concrete of the building as a support pile. 7. The heating and cooling method according to claim 1, wherein the metal tube is a copper tube. 8. An outlet end of the metal pipe of the last concrete column is connected to a cooling / heating device, and air discharged from the outlet end is further cooled or heated to be introduced into the room. The heating and cooling method according to any one of 1.