JPH04366372A - Geothermal energy application system - Google Patents

Abstract

PURPOSE:To enhance the performance coefficient of a heat pump by using geothermal eneryy which maintains a constant temperature throughout the year as a heat source for cooling/heating service. CONSTITUTION:An underground chamber 2 is formed in the ground under a building 1 where a vent passage 3 is installed so as to circulate outside air in the underground chamber 2. At the same time, the vent passage 3 is made to communicate with outdoor equipment 5 of a heat pump 4, which performs heat exchange between the outside air and the geothermal energy and supplies the heat to the outdoor equipment 5.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a geothermal utilization system that utilizes geothermal heat for heating and cooling.

0002

2. Description of the Related Art Conventional air conditioners have an indoor unit placed inside a building and an outdoor unit placed outside the building, so that the outdoor unit exchanges heat with the outside air.

0003

[Problem to be Solved by the Invention] However, there is a problem in that when performing air conditioning, the temperature of the outside air is high, and when performing heating, the temperature of the outside air is low, resulting in a low coefficient of performance (COP), especially in the early morning in winter. The problem was that its coefficient of performance was extremely low. The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a geothermal utilization system that can improve the coefficient of performance of a heat pump by performing heating and cooling using geothermal heat as a heat source, whose temperature does not change much throughout the year. There is something to do.

0004

[Means for Solving the Problems] In order to achieve the above object, the geothermal utilization system of the present invention forms a basement 2 underground under a building 1, provides a ventilation path 3 through which outside air passes through the basement 2, and provides a heat pump 4. The outdoor unit 5 and the ventilation path 3 are connected to each other. In addition, a basement 2 is formed underground under the building 1, a part of the basement 2 is filled with a liquid heat medium 6 such as water or other liquid, and the outdoor unit 5 of the heat pump 4 is filled with a liquid heat medium 6 such as water or other liquid.
It is also preferable that the condenser 7 or evaporator is disposed within the liquid heat medium 6.

[0005]

[Operation] In the former invention, outside air is transferred to the basement 2.
By passing the air through the ventilation path 3 of The coefficient of performance of the heat pump 4 can be improved and heating and cooling can be performed.

[0006] In the latter invention, heat is exchanged between the condenser 7 or the evaporator of the outdoor unit 5 and the liquid heat medium 6, which has reached approximately the same temperature as the underground temperature due to geothermal heat, to provide cooling during the summer. The coefficient of performance of the heat pump 4 can be improved both when heating the room and when heating in winter.

[0007]

[Embodiment] First, the embodiment shown in FIG. 1 will be described. A basement 2 is provided underground under the part where the building 1 is erected. The heat pump 4 is formed by an indoor unit 8, an outdoor unit 5, a compressor 9, an expansion valve 10, etc., the indoor unit 5 is installed inside the living room 11 of the building 1, and the outdoor unit 5 is installed outside the building 1. There is. basement 2
has a double structure of an outer shell 12 and an inner shell 13, and the outer shell 1
A ventilation path 3 is formed between the inner shell 13 and the inner shell 13. The outer shell 12 is made of concrete, metal, or the like, and has a predetermined structural strength and a high heat transmission coefficient. Further, the ventilation path 3 and the outdoor unit 5 are communicated through a duct 14. When the heat pump 4 is driven, cool air or warm air is discharged from the indoor unit 8 to perform heating and cooling, and the outdoor unit 5 exchanges heat with outside air. When the fan 5a of the outdoor unit 5 is driven, the outside air is sucked into the ventilation path 3 as shown by the arrow and exchanges heat with the geothermal heat, and the heat-exchanged outside air is sent to the outdoor unit 5 via the duct 14 and cools the outdoor unit 5. Heat is exchanged with In the summer, heat can be radiated from high temperature outside air into the ground to supply low temperature air to the outdoor unit 5, and in winter, low temperature outside air can absorb heat from the ground and high temperature air can be supplied to the outdoor unit 5. , the coefficient of performance of the heat pump 4 can be improved.

Next, the embodiment shown in FIG. 2 will be described. A shell 15 made of concrete or the like is buried underground to form a basement 2, and a heat medium filling chamber 17 partitioned off by the floor 16 is provided below a floor 16 of the basement 2. This heating medium filling chamber 17 is loaded with a liquid heating medium 6 made of water or other liquid. A condenser 7 or an evaporator of the outdoor unit 5 of the heat pump 4 is installed inside the liquid heat medium 6 of the heat medium filling chamber 17. Thus, the liquid heat medium 6 in the heat medium filling chamber 17 is maintained at substantially the same temperature as the underground temperature due to geothermal heat. In other words, heat is radiated into the ground in the summer, and heat is absorbed from the ground in the winter to maintain a constant temperature. Since heat is exchanged between the liquid heat medium 6 at a constant temperature and the condenser 7 or the evaporator, the coefficient of performance of the heat pump 4 is improved both when cooling in the summer and heating in the winter. At this time, the outdoor unit 5 can be placed underground, and noise can be reduced. Further, by providing an inspection port in the floor 16 of the basement 2, the condenser 7 and the evaporator can be easily inspected. It is extremely difficult to inspect conventional heat pumps that use well water as a heat source.

[0009]

Effects of the Invention In the invention of claim 1 of the present invention, as described above, a ventilation path through which outside air passes is provided in the basement, and the outdoor unit of the heat pump is communicated with the ventilation path, so that outside air is brought into the basement. By passing it through the ventilation path, it is possible to exchange heat with geothermal heat and supply outside air to the outdoor unit.In the summer, it is possible to supply low temperature air to the outdoor unit, and in the winter, it is possible to supply high temperature air to the outdoor unit. It can be used for heating and cooling by improving the coefficient of performance of heat pumps, and it can also be used to create a space called a basement, instead of digging up the soil just to utilize geothermal heat, which is the case with heat pumps that use groundwater such as well water as a heat source. This is done to utilize geothermal heat deep from the earth's surface, and it can be used beneficially.In addition, in conventional basements, there is a lot of condensation on the interior walls in the summer, but it allows outside air to pass through the basement. By doing so, it is possible to appropriately remove heat from the outside air, raise the temperature of the inner wall, and reduce condensation.

[0010] Furthermore, in the invention of claim 2 of the present invention,
A part of the basement is filled with a liquid heat medium such as water or other liquid, and the condenser or evaporator of the outdoor unit of the heat pump is placed in the liquid heat medium, so geothermal heat can be used to reduce the temperature underground. The heat pump can improve the coefficient of performance of the heat pump by exchanging heat between the liquid heat medium at the same temperature and the condenser or evaporator of the outdoor unit, and improving the coefficient of performance of the heat pump both when cooling in the summer and heating in the winter. This invention has the same effect as the invention of 2003, and also reduces noise because the outdoor unit is located in the basement.

[Brief explanation of drawings]

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

FIG. 2 is a sectional view of another embodiment same as the above.

[Explanation of symbols]

1 Building 2 Basement 3 Ventilation route 4 Heat pump 5 Outdoor unit 6. Liquid heat medium 7 Condenser

Claims (2)

[Claims] 1. A geothermal utilization system characterized by forming a basement underground under a building, providing a ventilation path through which outside air passes through the basement, and communicating an outdoor unit of a heat pump with the ventilation path. [Claim 2] Forming a basement underground under the building, filling a part of the basement with a liquid heat medium such as water or other liquid,
A geothermal utilization system characterized by arranging a condenser or evaporator of an outdoor unit of a heat pump in a liquid heat medium.