Geothermal heating and cooling system using helical piles for ground reinforcement

Abstract

The present invention relates to a geothermal heating and cooling system using helical piles for ground reinforcement, and more specifically, by applying helical piles for ground reinforcement to a geothermal heat exchanger, the number of construction steps for the geothermal heating and cooling system is shortened and the system is installed stably in the ground, thereby enabling the construction of a heating and cooling system at a relatively low cost. The present invention comprises a heat pump (100) in which a compressor (110), a four-way valve (120), a condenser (130), an expansion valve (140), and an evaporator (150) are connected to a refrigerant circulation line (160), so that refrigerant moves along the refrigerant circulation line (160), and latent heat of evaporation is exchanged in an indoor unit (21) to cool the indoor space; A refrigerant heat generator (200) equipped with a thermoelectric element (Q) that produces electricity according to the temperature difference between a high-temperature heat medium that is heat-exchanged with a high-temperature, high-pressure refrigerant gas supplied through a compressor (110) in a first heat exchanger (220) while moving along a heat medium circulation line (210) and a low-temperature, low-pressure refrigerant gas that is circulated through an evaporator (150); This is achieved by including a geothermal circulation device (300) in which geothermal circulation water moves along a geothermal circulation line (340) in a geothermal heat exchanger (330) installed underground, and condenses into a liquid refrigerant by exchanging heat with a low-temperature, low-pressure refrigerant liquid of a geothermal circulation heat exchanger (350) or a high-temperature, high-pressure refrigerant gas of a condenser (130).

Description

Technology Field

[0001] The present invention relates to a geothermal heating and cooling system using helical piles for ground reinforcement, and more specifically, by applying helical piles for ground reinforcement to a geothermal heat exchanger, the number of construction steps for the geothermal heating and cooling system is shortened and the system is installed stably in the ground, thereby enabling the construction of a heating and cooling system at a relatively low cost. Background Technology

[0003] In general, geothermal heating and cooling systems are classified as renewable energy technologies capable of curbing the use of fossil fuels due to global warming, and are establishing themselves as a universal technology available for use anywhere in the world.

[0004] Until now, as an example of a system capable of efficiently performing cooling and heating in parallel, there has been a geothermal cooling and heating system utilizing a heat pump, and the above prior art consists of the geothermal cooling system of FIG. 1 and the geothermal heating system of FIG. 2.

[0005] In the geothermal cooling system of FIG. 1, when cooling, high-temperature vapor refrigerant in the condenser (13) performs heat exchange with a fluid circulating inside a geothermal heat exchanger (33) with a relatively low temperature, and in this process, the temperature of the fluid rises and the high-temperature, high-pressure refrigerant gas undergoes a state change (condensation) from the vapor phase to the liquid phase.

[0006] The above low-temperature, low-pressure gaseous refrigerant is turned into a high-temperature (100°C), high-pressure gaseous state by the compressor (11) and enters the condenser (13). In the condenser (13), the high-temperature, high-pressure refrigerant gas exchanges heat with the fluid circulating inside the geothermal heat exchanger, which has a relatively much lower temperature. During this process, the fluid, which is at 15 to 20°C before heat exchange, is raised to 20 to 25°C after heat exchange, and the refrigerant gas changes state (condenses) into a medium-temperature, high-pressure liquid state.

[0007] Additionally, the liquid refrigerant exiting the condenser (13) passes through the expansion valve (14) and is converted into a low-temperature, low-pressure spray liquid state, and the liquid refrigerant in the low-temperature, low-pressure spray liquid state enters the evaporator (15) and exchanges heat with the fluid that cools the indoor air through the indoor unit (21).

[0008] Therefore, in the above heat exchange process, the liquid refrigerant changes phase (evaporates) into steam while cooling the fluid flowing into the evaporator (15), and the low-temperature, low-pressure gas coming out of the evaporator (15) passes through the four-way valve and enters the compressor (11), undergoing a compression process to become high-temperature, high-pressure steam refrigerant again.

[0009] And, FIG. 2 schematically illustrates a heating cycle of the prior art, in which high-temperature, high-pressure vapor refrigerant exiting the compressor (11) enters the condenser (13) through the four-way valve (12), and in the condenser (13), the refrigerant gas exchanges heat with the indoor circulation fluid (air or water) which has a relatively low temperature, the refrigerant gas changes from a gaseous state to a liquid state, and the temperature of the indoor circulation fluid rises.

[0010] Additionally, the liquid refrigerant exiting the condenser (13) passes through the expansion valve (14), where its temperature and pressure decrease, and enters the evaporator (15) as a liquid refrigerant in a low-temperature, low-pressure sprayed liquid state. The liquid refrigerant entering the evaporator (15) exchanges heat with relatively high heat from the fluid of the geothermal heat exchanger (33), evaporates again, and is converted into a refrigerant having a low-temperature, low-pressure gaseous state, and has a circulation configuration that passes through the four-way valve and enters the compressor.

[0011] The above-mentioned refrigerant cycle is a known technology, so a detailed explanation will be omitted. However, a heating and cooling system utilizing geothermal energy and a heat pump is evaluated as the most energy-efficient technology among new and renewable energies because the underground temperature is a stable heat source of 15 to 20°C year-round, allowing for the supply of stable energy with minimal external energy supply.

[0012] However, there was a problem in that the initial investment cost increased and the economic burden was heightened because a geothermal heat exchanger had to be installed separately in the existing cooling and heating system.

[0013] In addition, existing geothermal heat exchangers are constructed by drilling holes approximately 100 to 200 meters deep with a diameter of 150 mm, inserting U-type PE pipes for heat medium circulation into the holes, and filling them with grouting fluid. However, this construction method accounts for about 50% of the total construction cost for geothermal heating and cooling, which poses a problem of placing a significant economic burden.

[0014] In addition, until now, ground heat exchangers have been constructed using materials similar in shape to piles, but they have not been able to secure enough strength to support the load of a building, so they cannot be used as building foundations and are used solely for the purpose of acquiring and releasing geothermal heat for heating and cooling. As a result, there have been problems such as increased labor costs and construction expenses because separate work must be performed to drive, rotate, or press piles into the ground to safely support the building on the ground. Prior art literature

[0016] Republic of Korea Published Patent Application No. 10-2012-0041374. Geothermal heating and cooling system capable of generating power using shallow geothermal energy (Publication Date: May 2, 2012) The problem to be solved

[0017] The present invention aims to solve the problems of the conventional technology described above by providing a geothermal heating and cooling system using helical piles for ground reinforcement, which enables the simultaneous performance of work for building foundations and the installation of a heat exchanger for geothermal heating and cooling by utilizing helical piles constructed to reinforce the ground and installing a geothermal heat exchanger inside the helical piles.

[0018] In addition, the present invention aims to provide a geothermal heating and cooling system using helical piles for ground reinforcement, which can prevent overheating of the underground circulating water circulating in the geothermal heat exchanger and prevent a decrease in the efficiency of the refrigerant circulation cycle due to overheating by exchanging heat between the underground circulating water in the condenser and the geothermal circulating heat exchanger to maintain it at a constant temperature, and can prevent freezing of the geothermal heat exchanger and water tank in winter and maximize hot water production.

[0019] In addition, the present invention aims to provide a geothermal heating and cooling system using a helical pile for ground reinforcement, which secures economic efficiency and significantly reduces the overall settlement by increasing skin friction and tip bearing capacity while rotating excavating a relatively hard weathered soil layer or weathered rock layer, by configuring an auger bit for rock drilling inside the helical pile, configuring the continuous blade auger of the auger bit and the helical pile to be connected as the diameter of the helical disc of the helical pile gradually widens, and forming the pitch spacing of the helical disc narrowly. means of solving the problem

[0021] A first embodiment of the present invention for solving such technical problems comprises a heat pump (100) in which a compressor (110), a four-way valve (120), a condenser (130), an expansion valve (140), and an evaporator (150) are connected to a refrigerant circulation line (160) so that refrigerant moves along the refrigerant circulation line (160), and latent heat of evaporation is exchanged in an indoor unit (21) to cool the indoor space;

[0022] A refrigerant heat generator (200) equipped with a thermoelectric element (Q) that produces electricity according to the temperature difference between a high-temperature heat medium that is heat-exchanged with a high-temperature, high-pressure refrigerant gas supplied through a compressor (110) in a first heat exchanger (220) while moving along a heat medium circulation line (210) and a low-temperature, low-pressure refrigerant gas that is circulated through an evaporator (150);

[0023] This is achieved by including a geothermal circulation device (300) in which geothermal circulation water moves along a geothermal circulation line (340) in a geothermal heat exchanger (330) installed underground, and condenses into a liquid refrigerant by exchanging heat with a low-temperature, low-pressure refrigerant liquid of a geothermal circulation heat exchanger (350) or a high-temperature, high-pressure refrigerant gas of a condenser (130).

[0024] Additionally, a second embodiment of the present invention comprises a heat pump (100) in which a compressor (110), a four-way valve (120), a condenser (130), an expansion valve (140), and an evaporator (150) are connected to a refrigerant circulation line (160) so that refrigerant moves along the refrigerant circulation line (160), and condensation heat is exchanged in an indoor unit (21) to heat the indoor space;

[0025] A refrigerant heat generator (200) equipped with a thermoelectric element (Q) that produces electricity according to the temperature difference between a high-temperature heat medium that is heat-exchanged with a high-temperature, high-pressure refrigerant gas supplied through a compressor (110) in a first heat exchanger (220) while moving along a heat medium circulation line (210) and a low-temperature, low-pressure refrigerant gas that is circulated through an evaporator (150);

[0026] This is achieved by including a geothermal circulation device (300) in which geothermal circulation water moves along a geothermal circulation line (340) in a geothermal heat exchanger (330) installed underground, and evaporates into a low-temperature, low-pressure refrigerant gas by exchanging heat with a high-temperature, high-pressure refrigerant gas of a geothermal circulation heat exchanger (350) or a low-temperature, low-pressure refrigerant liquid of an evaporator (150).

[0027] Additionally, the geothermal heat exchanger (330) can be configured by drilling and inserting a helical pile (400) into the ground, installing a geothermal circulation pipe (310) inside the helical pile (400), and then fixing it by injecting grouting material, and connecting the geothermal circulation pipe (310) to a geothermal circulation line (340).

[0028] Additionally, the helical pile (400) has a tip pile extension (420) formed at the bottom and a bit coupling member (430) protruding from the inner circumference of the tip pile extension (420) is formed, and as the auger bit (500) inserts the inner pipe pile (510) provided at the bottom into the inside of the helical pile (400), the bit coupling member (430) of the tip pile extension (420) is inserted into the bit coupler fitting groove (530) provided at the top of the auger bit (500), and the bit coupling member (430) slides to the coupling member fixing groove (535) according to the rotational direction of the inner pipe pile (510), so that the helical pile (400) and the inner pipe pile (510) rotate in conjunction, and the continuous blade auger (520) rotates and excavates the rock layer, and when the excavation is finished The inner pipe pile (510) can be reverse-rotated so that the bit binding member (430) is separated from the binding member fixing groove (535), and the continuous blade auger (520) and the inner pipe pile (510) can be recovered.

[0029] Additionally, in the tip pile extension portion (420) of the helical pile (400), a spiral disc (440) having a spiral shape with an inclination angle of 20 to 40 degrees can be formed so that the diameter gradually increases from the lower outer edge in the upward direction.

[0030] Additionally, the above-mentioned refrigerant heat generator (200) may be configured to further include a solar heating device (250) that generates electricity from the thermoelectric element (Q) according to the temperature difference with the low-temperature, low-pressure refrigerant gas, and in which hot water heated through the solar collector (251) circulates through the hot water circulation line (253) with the thermoelectric element (Q) in between.

[0031] Additionally, the above geothermal circulation device (300) may further be configured with a geothermal circulation heat exchanger (350) that exchanges heat with the geothermal circulation water of the geothermal circulation line (340) by opening a bypass valve (235) when the temperature of the supplied liquid refrigerant exceeds a set temperature value or when the operation of the evaporator (150) stops, and allowing the low-temperature, low-pressure refrigerant liquid to move through a bypass line (230).

[0032] Additionally, the above-mentioned refrigerant heat generator (200) may further be configured with a geothermal circulation heat exchanger (350) in which a bypass valve (235) is opened when the temperature of the supplied high-temperature, high-pressure refrigerant gas exceeds a set temperature value or when the operation of the condenser (130) is stopped, and the high-temperature, high-pressure refrigerant moves through a bypass line (230) to exchange heat with the geothermal circulation water of the geothermal circulation line (340).

[0033] Additionally, the above geothermal circulation device (300) comprises: a fluid storage tank (301) for storing geothermal circulation water at a constant temperature; a fluid supply line (307) for supplying cold water or hot water supplied through an external fluid supply port (305) to the fluid storage tank (301) while exchanging heat with a low-temperature, low-pressure refrigerant gas in a second heat exchanger (320) to maintain a constant temperature of the geothermal circulation water; and a geothermal heat exchanger (330) through which the geothermal circulation water supplied through the output of the fluid storage tank (301) moves into the interior of a helical pile (400) installed underground, and which is discharged after exchanging heat with geothermal heat. A geothermal circulation line (340) may be included, which is connected so that the geothermal circulation water heat-exchanged in the above geothermal heat exchanger (330) is circulated to the input of the fluid storage tank (301) via the condenser (130) or evaporator (150) and the geothermal circulation heat exchanger (350). Effects of the invention

[0035] According to the present invention, by utilizing helical piles constructed to reinforce the ground and installing a geothermal heat exchanger inside the helical piles, the work for the building foundation and the work for installing a heat exchanger for geothermal heating and cooling are performed simultaneously, thereby improving work efficiency.

[0036] In addition, by exchanging heat between the underground circulating water circulating through the geothermal heat exchanger and the condenser and geothermal circulating heat exchanger to maintain it at a constant temperature, it is possible to prevent overheating of the underground circulating water and prevent a decrease in the efficiency of the refrigerant circulation cycle due to overheating, and there is an advantage of preventing freezing of the geothermal heat exchanger and water tank during the winter and maximizing the production of hot water.

[0037] In addition, by configuring an auger bit for rock drilling inside the helical pile and connecting the drilling angle of the continuous blade auger of the auger bit with the spiral disc of the helical pile, and forming the pitch spacing of the spiral disc narrowly, it is possible to increase the skin friction and tip bearing capacity of the helical pile while rotating and drilling a relatively hard weathered soil layer or weathered rock layer, thereby ensuring economic efficiency, and significantly reducing the overall settlement, which can improve economic efficiency and construction convenience. Brief explanation of the drawing

[0039] Figure 1 is a diagram of a conventional cooling system using geothermal energy. Figure 2 is a diagram of a conventional heating system using geothermal energy. FIG. 3 is a configuration diagram illustrating a cooling system using geothermal energy according to the present invention. FIGS. 4a to 4d are schematic cross-sectional views illustrating the construction process of a helical pile, which is a component of the present invention. FIG. 5 is a configuration diagram illustrating an embodiment of a cooling system using geothermal energy according to the present invention. FIG. 6 is a schematic diagram illustrating a heating system using geothermal energy according to the present invention. FIG. 7 is a configuration diagram illustrating an embodiment of a heating system using geothermal energy according to the present invention. Specific details for implementing the invention

[0040] The geothermal heating and cooling system using helical piles for ground reinforcement according to the present invention is designed to enable the construction of a heating and cooling system at a relatively low cost by applying helical piles for ground reinforcement to a geothermal heat exchanger, thereby shortening the number of construction steps for the geothermal heating and cooling system and ensuring stable installation in the ground.

[0041] In particular, the diameter of the spiral continuous blade auger installed on the inner pipe pile to excavate the weathered rock layer gradually widens to excavate the rock in a screw-like manner, and it is configured to be similar to the inclination angle of the spiral disc of the helical pile to facilitate the discharge of crushed stone, and in the case of hard rock, it is configured to increase the frictional force on the side and the tip bearing capacity with a spiral disc with a narrow pitch spacing.

[0042] The geothermal heating and cooling system using helical piles for ground reinforcement according to the present invention can be manufactured with various configurations, and the features thereof can be understood through the embodiments described in detail with reference to the attached drawings.

[0043] The present invention is capable of various modifications and may take various forms, and embodiments are to be described in detail in the text. However, this is not intended to limit the present invention to the specific disclosed forms, and it should be understood that it includes all modifications, equivalents, and substitutions that fall within the spirit and scope of the invention.

[0044] Hereinafter, preferred embodiments of the present invention will be described in more detail with reference to the drawings.

[0045] FIG. 3 describes a geothermal cooling system using a helical pile for ground reinforcement, which is a component of the present invention. First, the compressor (110), four-way valve (120), condenser (130), expansion valve (140), and evaporator (150) applied to the present invention are connected to a refrigerant circulation line (160), and the refrigerant moves along the refrigerant circulation line (160). Since the heat pump (100) configuration, which cools the indoor space by heat exchange of latent heat of evaporation in the indoor unit (21), can be applied in various ways according to the requirements of those working in the relevant industry, the present invention is not limited to a specific configuration.

[0046] The heat pump (100) above compresses the refrigerant through the compressor (110), thereby changing the state of the low-temperature, low-pressure refrigerant gas into a high-temperature, high-pressure refrigerant gas. The refrigerant compressed in the compressor (110) is discharged with a temperature of approximately 100°C, and the high-temperature, high-pressure refrigerant gas is discharged to the condenser (130) through the four-way valve (120) by operation of the control unit.

[0047] The above condenser (130) performs the function of a plate heat exchanger, and the geothermal circulation water having a low temperature of approximately 15 to 20°C supplied through the geothermal circulation line (340) exchanges heat with the high temperature high pressure refrigerant gas, and the high temperature high pressure refrigerant gas is converted into a medium temperature high pressure refrigerant liquid (approximately 15 to 20°C) and discharged to the expansion valve (140).

[0048] The above expansion valve (140) is a conventional valve for controlling cooling heat, and vaporizes medium-temperature high-pressure refrigerant liquid to convert it into a low-temperature low-pressure spray refrigerant of approximately -10°C, which is then heat-exchanged with the hot air in the room at the evaporator (150) of the indoor unit (21) of the air conditioner connected to the refrigerant circulation line (160) to release cold air into the room to cool it, and the refrigerant that has undergone heat exchange in the evaporator (150) is discharged with a temperature of approximately 10°C.

[0049] The refrigerant gas discharged from the above evaporator (150) is supplied to the low-temperature side of the refrigerant heat generator (200) through the 4-way valve (120), and then discharged and supplied to the compressor (110), thus having a circulation structure.

[0050] In addition, the refrigerant heat generator (200) of the present invention is equipped with a thermoelectric element (Q) that produces electricity according to the temperature difference between the high-temperature heat medium, which is heat-exchanged with the high-temperature, high-pressure refrigerant gas supplied through the compressor (110) in the first heat exchanger (220), and the low-temperature, low-pressure refrigerant gas that is circulated through the evaporator (150).

[0051] To explain this in detail, a heat medium is stored in a heat medium storage tank (205) to maintain a certain level, and the heat medium is circulated through a heat medium circulation line (210) by operating a heat medium supply pump. The heat medium is then heat-exchanged with a high-temperature, high-pressure refrigerant gas (approximately 100°C) supplied through a compressor (110) in a first heat exchanger (220) and supplied to a refrigerant heat generator (200) in a high-temperature state.

[0052] The above-described refrigerant heat generator (200) is configured such that a thermoelectric element (Q) is positioned in the center, a high-temperature heat medium moves on the upper side of the drawing, and a low-temperature, low-pressure refrigerant gas (approximately 10°C) discharged from an evaporator (150) moves on the lower side, thereby generating electricity from the temperature difference between the high and low temperatures delivered to both sides of the thermoelectric element (Q). Since the configuration of the aforementioned thermoelectric element (Q) can be applied in various ways according to the requirements of those working in the relevant industry, the present invention is not limited to a specific one.

[0053] Here, in the above-mentioned refrigerant heat generator (200), the high-temperature section through which hot water heated by solar heat circulates is positioned with the low-temperature section through which the low-temperature, low-pressure refrigerant gas moves and the thermoelectric element (Q) in between, thereby enabling the maximization of electricity production efficiency.

[0054] To this end, the solar heating device (250) is configured to have a high-temperature portion of a refrigerant heat generator (200) on the upper and lower sides of the drawing of the thermoelectric element (Q), and to have high-temperature hot water heated through a solar collector (251) circulate through a hot water circulation line (253) and generate electricity in the thermoelectric element (Q) according to the temperature difference with the low-temperature, low-pressure refrigerant gas.

[0055] Here, it is noted that hot water or a heat medium that can be heated to a temperature of 200°C may be applied to the hot water circulation line (253) and the heat medium circulation line (210), and that the choice of application may be made depending on the usage environment, etc.

[0057] And, the geothermal circulation device (300) includes a fluid storage tank (301) for storing geothermal circulation water at a constant temperature, a fluid supply line (307) for supplying cold water supplied through an external fluid supply port (305) to the fluid storage tank (301) while exchanging heat with a low-temperature, low-pressure refrigerant gas in a second heat exchanger (320) to maintain the temperature of the geothermal circulation water at a constant level, a geothermal heat exchanger (330) through which the geothermal circulation water supplied through the output of the fluid storage tank (301) moves into the inside of a helical pile (400) installed underground and is discharged after exchanging heat with geothermal heat, and a geothermal circulation line (340) connected so that the geothermal circulation water exchanged in the geothermal heat exchanger (330) is circulated to the input of the fluid storage tank (301) via a condenser (130) or an evaporator (150) and a geothermal circulation heat exchanger (350).

[0058] The above geothermal heat exchanger (330) is applied to a vertical geothermal heat exchanger, and is configured such that a geothermal circulation pipe (310) is installed inside a helical pile (400) that is inserted into the ground, and a grouting material is injected to fix it, and a geothermal circulation line (340) is connected to the geothermal circulation pipe (310), thereby configuring the geothermal circulation water moving along the geothermal circulation pipe (310) to be heated or cooled to a constant temperature and circulated.

[0059] At this time, the helical pile (400) is installed by drilling at a certain depth to increase tip bearing capacity and surrounding frictional force. The helical pile (400) is connected to a leader and a rotary motor that are vertically erected on the ground and a pile extractor. Since the configuration of the pile extractor and the rotary motor for operating the helical pile (400) is a known technology, a detailed description will be omitted.

[0060] Additionally, the helical pile (400) is formed by connecting multiple hollow pipe-shaped piles together, and is equipped with a helical disc (410) on its outer circumference, which is then inserted vertically into the ground by digging into the ground in a screw manner.

[0061] Here, as shown in FIG. 4a, an inner pipe pile (510) with an auger bit (500) provided at the bottom is inserted into the inner side of the helical pile (400), and the inner pipe pile (510) is rotated by a leader and a rotary motor provided on the ground, and the auger bit (500) is configured to excavate the rock.

[0062] At this time, the helical pile (400) is configured such that a tip pile extension (420) with a diameter larger than that of a pipe is formed at the bottom, and a bit coupling member (430) protruding from the inner circumference of the tip pile extension (420) is formed, so that as shown in FIG. 4b, an inner pipe pile (510) with an auger bit (500) provided at the bottom is inserted into the inside of the helical pile (400), and the bit coupling member (430) of the tip pile extension (420) is inserted into a bit coupler fitting groove (530) formed in a groove shape on the upper side of the auger bit (500).

[0063] The bit coupler fitting groove (530) is formed with a vertical groove shape, and a binding member fixing groove (535) having a horizontal groove is formed on the upper side to form an overall "T" shape. As the auger bit (500) integrally formed with the inner pipe pile (510) moves downward, the bit binding member (430) of the tip pile extension part (420) is fitted into the bit coupler fitting groove (530) and lowered. Then, the bit binding member (430) is fixed inside the binding member fixing groove (535) according to the rotational direction of the inner pipe pile (510) and can rotate in conjunction with the tip pile extension part (420) of the helical pile (400).

[0064] Accordingly, the bit binding member (430) slides into the binding member fixing groove (535) according to the rotational direction of the inner pipe pile (510), and as the helical pile (400) and the inner pipe pile (510) rotate in conjunction, the continuous blade auger (520) rotates and excavates the rock layer, and the spiral disc (440) provided on the outer circumference of the tip pile expansion part (420) digs into the groove excavated by the continuous blade auger (520) to increase the tip bearing capacity and surrounding frictional force with the rock and allows it to be fixed.

[0065] The spiral disc (440) provided in the tip pile expansion section (420) is configured to have a spiral shape with an inclination angle of 20 to 40 degrees, so that the diameter gradually increases from the lower outer edge in the upward direction, thereby improving straightness along with excavation efficiency according to the rotation of the inner pipe pile (510) and the helical pile (400).

[0066] In addition, it is desirable that the auger bit (500) and the spiral disc (440) be formed with the same spiral direction so that the debris and crushed stones generated during the excavation process by the rotation of the inner pipe pile (510) and the helical pile (400) are quickly discharged from the auger bit (500) along the spiral direction of the spiral disc (440), thereby improving the excavation rotation efficiency.

[0067] As described above, after excavating to the planned depth so that the helical disc (410) and spiral disc (440) of the helical pile (400) are fixed to the ground and bedrock, the inner pipe pile (510) is rotated in reverse as shown in Fig. 4c so that the bit binding member (430) inserted into the binding member fixing groove (535) is positioned again in the central bit coupler insertion groove (530), and then the inner pipe pile (510) is moved up and down so that all of the inner pipe pile (510) containing the relatively expensive auger bit (500) can be recovered.

[0068] And, as shown in FIG. 4d, a geothermal circulation pipe (310) is inserted into the internal space of the helical pile (400), and then a grouting material is injected to fix the geothermal circulation pipe (310), thereby enabling the acquisition and release of geothermal heat.

[0069] Accordingly, the geothermal circulation device (300) circulates the process in which geothermal circulation water moves along the geothermal circulation line (340), acquires and releases geothermal heat from the geothermal heat exchanger (330), exchanges heat with a refrigerant in the geothermal circulation heat exchanger (350), the condenser (130) or evaporator (150), and the third heat exchanger (360), mixes with the geothermal circulation water stored in the fluid storage tank (301) to reach a certain temperature, and then supplies it back to the geothermal heat exchanger (330).

[0070] At this time, the fluid storage tank (301) may be further equipped with a fluid supply line (307) that can maintain a constant temperature of the geothermal circulation water by receiving cold water and hot water through an external fluid supply port (305). The present invention may also include the fluid supply line (307) being connected to a second heat exchanger (320) so that it is supplied to the fluid storage tank (301) after heat exchange with the low-temperature, low-pressure refrigerant gas discharged from the refrigerant heat generator (200).

[0071] That is, the refrigerant gas, which has a relatively higher temperature after heat exchange with a high-temperature heat medium and hot water in the refrigerant heat generator (200), can be supplied to the compressor (110) in the second heat exchanger (320) using cold water or hot water from the fluid supply line (307) to maintain a constant temperature of the refrigerant gas, thereby improving the efficiency of the compressor (110).

[0073] The geothermal cooling system of the present invention as described above is configured such that, as shown in FIG. 3, the compressor (110), four-way valve (120), condenser (130), expansion valve (140), and evaporator (150), which are components of the heat pump (100), are connected to a refrigerant circulation line (160), and the refrigerant moves along the refrigerant circulation line (160), and the latent heat of evaporation is exchanged in the indoor unit (21) to cool the indoor space, and the refrigerant circulates from the evaporator (150) to the compressor (110) via the four-way valve (120), refrigerant heat generator (200), and second heat exchanger (320).

[0074] Additionally, the refrigerant heat generator (200) is configured to produce electricity in a thermoelectric element (Q) according to the temperature difference between the high-temperature heat medium that is heat-exchanged with the high-temperature, high-pressure refrigerant gas supplied through the compressor (110) in the first heat exchanger (220) while moving along the heat medium circulation line (210) and the low-temperature, low-pressure refrigerant gas that is circulated through the evaporator (150).

[0075] At this time, the solar heating device (250) can be optionally installed in the refrigerant heat generator (200) to produce electricity in a thermoelectric element (Q) according to the temperature difference between the hot water heated by solar heat and the low-temperature, low-pressure refrigerant gas circulated through the evaporator (150), thereby improving the electricity production efficiency.

[0076] And, the geothermal circulation device (300) increases the temperature of the geothermal circulation water stored in the fluid storage tank (301) by passing it through the geothermal heat exchanger (330) and then discharges it for use through the faucet, or it is circulated to be supplied to the fluid storage tank (301) after passing through the geothermal circulation heat exchanger (350) and exchanging heat with the high-temperature, high-pressure refrigerant gas in the condenser (130) and then passing through the third heat exchanger (360), thereby maintaining the temperature of the geothermal circulation water at a constant level.

[0077] Here, the geothermal circulation heat exchanger (350) does not operate because the movement of refrigerant through the bypass line (230) is restricted by the operation of the evaporator (150), so it does not exchange heat with the geothermal circulation water, and the third heat exchanger (360) is also configured so that the low-temperature, low-pressure refrigerant gas that has passed through the evaporator (150) is supplied directly to the low-temperature section of the refrigerant heat generator (200) without bypassing.

[0078] That is, the present invention also includes a configuration in which, when the operation of the above-mentioned evaporator (150) is stopped, the bypass valve (235) is opened and the low-temperature, low-pressure refrigerant liquid moves through the bypass line (230) to exchange heat with the geothermal circulation water of the geothermal circulation line (340) in the geothermal circulation heat exchanger (350).

[0079] Therefore, by reinforcing the ground through the construction of helical piles (400) and utilizing the helical piles (400) as a geothermal heat exchanger (330), the number of processes for geothermal heating and cooling construction work can be shortened and a heating and cooling system can be constructed at a relatively low cost.

[0081] And, as an example of the above cooling operation, when the evaporator (150) is stopped as shown in FIG. 5, the control unit opens the bypass valve (235) so that the refrigerant moves to the bypass line (230) and is configured to exchange heat with the geothermal circulating water in the geothermal circulating heat exchanger (350), thereby lowering the temperature of the geothermal circulating water, and then the geothermal circulating water exchanges heat with the high-temperature, high-pressure refrigerant gas in the condenser (130).

[0082] In addition, the present invention also includes the refrigerant passing through the geothermal circulation heat exchanger (350) passing through the 4-way valve (120) to exchange heat with geothermal circulation water again in the refrigerant heat generator (200) or the third heat exchanger (360) and supplying it to the low-temperature portion of the refrigerant heat generator (200).

[0084] To describe the geothermal heating system using a helical pile for ground reinforcement, which is the second embodiment of the present invention, as shown in FIG. 6, the heat pump (100) is configured such that the compressor (110), the four-way valve (120), the condenser (130), the expansion valve (140), and the evaporator (150) are connected to the refrigerant circulation line (160), so that the refrigerant moves along the refrigerant circulation line (160), and the condensation heat is exchanged in the indoor unit (21) to heat the indoor space.

[0085] And, the refrigerant heat generator (200) is configured to produce electricity in a thermoelectric element (Q) according to the temperature difference between the high-temperature heat medium that is heat-exchanged with the high-temperature, high-pressure refrigerant gas supplied through the compressor (110) in the first heat exchanger (220) while moving along the heat medium circulation line (210) and the low-temperature, low-pressure refrigerant gas that is circulated through the evaporator (150).

[0086] At this time, the configuration and operation process of the above-mentioned refrigerant heat generator (200) and geothermal circulation device (300) are identical to the description in FIG. 3 described above, so a detailed explanation will be omitted.

[0087] In addition, as shown in FIG. 7, when the condenser (130) is stopped, the control unit opens the bypass valve (235) to move the refrigerant to the bypass line (230) so that it exchanges heat with the geothermal circulating water in the geothermal circulating heat exchanger (350), thereby lowering the temperature of the geothermal circulating water, and then the geothermal circulating water exchanges heat with the high-temperature, high-pressure refrigerant gas in the evaporator (150).

[0088] In addition, the refrigerant that has passed through the above geothermal circulation heat exchanger (350) passes through the 4-way valve (120) and undergoes a process of exchanging heat with geothermal circulation water again in the refrigerant heat generator (200) or the third heat exchanger (360) and supplying it to the low-temperature portion of the refrigerant heat generator (200).

[0089] As described above, the present invention utilizes a helical pile (400) constructed to reinforce the ground, installs a geothermal heat exchanger (330) inside the helical pile (400), and configures it to generate electricity from a thermoelectric element (Q) according to the temperature difference between the heat medium and the refrigerant, thereby increasing cooling and heating efficiency and allowing the auger bit (500) to be easily recovered during the excavation work to fix the helical pile (400), thus providing effects such as reducing construction costs and work periods.

[0091] As described above, the embodiments explained are the most preferred examples of the present invention, but are not limited to the above embodiments, and it is obvious to those skilled in the art that various modifications are possible within the scope of the technical spirit of the present invention. Explanation of the symbols

[0093] 100. Heat pump 110. Compressor 120. 4-way valve 130. Condenser 140. Expansion valve 150. Evaporator 160. Refrigerant circulation line 200. Refrigerant heat generator 210. Heat transfer fluid circulation line 220. First heat exchanger 230. Bypass line 250. Solar heating device 251. Solar collector 253. Hot water circulation line 300. Geothermal circulation device 310. Geothermal circulation pipe 320. Second heat exchanger 330. Geothermal heat exchanger 340. Geothermal circulation line 350. Geothermal circulation heat exchanger 400. Helical Pile 410. Helical Plate 420. Tip pile extension 430. Bit binder 440. Spiral disc 500. Auger bit 510. Internal pipe pile 520. Continuous auger 530. Bit clamp insertion groove 535. Binding fixture fixing groove

Claims

Claim 1 A heat pump (100) in which a compressor (110), a four-way valve (120), a condenser (130), an expansion valve (140), and an evaporator (150) are connected to a refrigerant circulation line (160) so that refrigerant moves along the refrigerant circulation line (160), and latent heat of evaporation is exchanged in an indoor unit (21) to cool the indoor space; a refrigerant heat generator (200) equipped with a thermoelectric element (Q) that generates electricity according to the temperature difference between a high-temperature heat medium that moves along a heat medium circulation line (210) and exchanges heat with the high-temperature, high-pressure refrigerant gas supplied through the compressor (110) in a first heat exchanger (220), and a low-temperature, low-pressure refrigerant gas that circulates through the evaporator (150); and a geothermal circulation water that moves along a geothermal circulation line (340) in a geothermal heat exchanger (330) installed underground, and a low-temperature, low-pressure refrigerant liquid or of a geothermal circulation heat exchanger (350). A geothermal circulation device (300) that exchanges heat with the high-temperature, high-pressure refrigerant gas of a condenser (130) to condense it into a liquid refrigerant is included;The above geothermal heat exchanger (330) is formed by drilling and inserting a helical pile (400) into the ground, installing a geothermal circulation pipe (310) inside the helical pile (400), and then fixing it by injecting grouting material, and the geothermal circulation pipe (310) is connected to a geothermal circulation line (340). The helical pile (400) has a tip pile expansion section (420) formed at the bottom, and a bit coupling member (430) protruding from the inner circumference of the tip pile expansion section (420) is formed so that an auger bit (500) is inserted into the inner pipe pile (510) provided at the bottom of the helical pile (400), and the bit coupling member (430) of the tip pile expansion section (420) is inserted into the bit coupler fitting groove (530) provided at the top of the auger bit (500). A geothermal heating and cooling system using a helical pile for ground reinforcement, characterized in that, depending on the rotational direction of the inner pipe pile (510), the bit binding member (430) slides into the binding member fixing groove (535), so that the helical pile (400) and the inner pipe pile (510) rotate in conjunction, and the continuous blade auger (520) rotates and excavates the rock layer, and when the excavation is finished, the inner pipe pile (510) is rotated in reverse so that the bit binding member (430) is separated from the binding member fixing groove (535) and the continuous blade auger (520) and the inner pipe pile (510) are recovered. Claim 2 A heat pump (100) in which a compressor (110), a four-way valve (120), a condenser (130), an expansion valve (140), and an evaporator (150) are connected to a refrigerant circulation line (160) so that refrigerant moves along the refrigerant circulation line (160), and condensation heat is exchanged in an indoor unit (21) to heat the indoor space; a refrigerant heat generator (200) equipped with a thermoelectric element (Q) that generates electricity according to the temperature difference between a high-temperature heat medium that moves along a heat medium circulation line (210) and exchanges heat with the high-temperature, high-pressure refrigerant gas supplied through the compressor (110) in a first heat exchanger (220), and a low-temperature, low-pressure refrigerant gas that circulates through the evaporator (150); and a geothermal circulation water that moves along a geothermal circulation line (340) from a geothermal heat exchanger (330) installed underground, and the high-temperature, high-pressure refrigerant gas of a geothermal circulation heat exchanger (350) or A geothermal circulation device (300) is included that evaporates low-temperature, low-pressure refrigerant liquid into low-temperature, low-pressure refrigerant gas by exchanging heat with the low-temperature, low-pressure refrigerant liquid of an evaporator (150);The above geothermal heat exchanger (330) is formed by drilling and inserting a helical pile (400) into the ground, installing a geothermal circulation pipe (310) inside the helical pile (400), and then fixing it by injecting grouting material, and the geothermal circulation pipe (310) is connected to a geothermal circulation line (340). The helical pile (400) has a tip pile expansion section (420) formed at the bottom, and a bit coupling member (430) protruding from the inner circumference of the tip pile expansion section (420) is formed so that an auger bit (500) is inserted into the inner pipe pile (510) provided at the bottom of the helical pile (400), and the bit coupling member (430) of the tip pile expansion section (420) is inserted into the bit coupler fitting groove (530) provided at the top of the auger bit (500). A geothermal heating and cooling system using a helical pile for ground reinforcement, characterized in that, depending on the rotational direction of the inner pipe pile (510), the bit binding member (430) slides into the binding member fixing groove (535), so that the helical pile (400) and the inner pipe pile (510) rotate in conjunction, and the continuous blade auger (520) rotates and excavates the rock layer, and when the excavation is finished, the inner pipe pile (510) is rotated in reverse so that the bit binding member (430) is separated from the binding member fixing groove (535) and the continuous blade auger (520) and the inner pipe pile (510) are recovered. Claim 3 delete Claim 4 delete Claim 5 A geothermal heating and cooling system using a helical pile for ground reinforcement, characterized in that, in claim 1 or 2, a spiral disc (440) having a spiral shape is formed in the tip pile expansion portion (420) of the helical pile (400), with an inclination angle of 20 to 40 degrees such that the diameter gradually increases from the lower outer circumference in the upward direction. Claim 6 A geothermal heating and cooling system using a helical pile for ground reinforcement, characterized in that, in claim 1 or 2, the refrigerant heat generator (200) further comprises a solar heating device (250) that generates electricity from the thermoelectric element (Q) according to the temperature difference with the low-temperature, low-pressure refrigerant gas, wherein hot water heated through a solar collector (251) circulates through a hot water circulation line (253) with the thermoelectric element (Q) in between. Claim 7 A geothermal cooling and heating system using helical piles for ground reinforcement, characterized in that, in the first paragraph, the geothermal circulation device (300) further comprises a geothermal circulation heat exchanger (350) in which a bypass valve (235) is opened and a low-temperature, low-pressure refrigerant liquid moves through a bypass line (230) to exchange heat with the geothermal circulation water of the geothermal circulation line (340) when the temperature of the supplied liquid refrigerant liquid is above a set temperature value or when the operation of the evaporator (150) is stopped. Claim 8 In claim 2, the geothermal heating and cooling system using a helical pile for ground reinforcement is further characterized in that the refrigerant heat generator (200) is configured with a geothermal circulation heat exchanger (350) in which, when the temperature of the supplied high-temperature high-pressure refrigerant gas exceeds a set temperature value or the operation of the condenser (130) stops, a bypass valve (235) is opened and the high-temperature high-pressure refrigerant moves through a bypass line (230) to exchange heat with the geothermal circulation water of the geothermal circulation line (340). Claim 9 In claim 1 or 2, the geothermal circulation device (300) comprises: a fluid storage tank (301) for storing geothermal circulation water at a constant temperature; a fluid supply line (307) for supplying cold water or hot water supplied through an external fluid supply port (305) to the fluid storage tank (301) while exchanging heat with a low-temperature, low-pressure refrigerant gas in a second heat exchanger (320) to maintain a constant temperature of the geothermal circulation water; a geothermal heat exchanger (330) through which the geothermal circulation water supplied through the output of the fluid storage tank (301) moves into the interior of a helical pile (400) installed underground, and which exchanges heat with geothermal heat and discharges it; and a geothermal heat exchanger (330) connected so that the geothermal circulation water exchanged in the geothermal heat exchanger (330) circulates to the input of the fluid storage tank (301) via a condenser (130) or an evaporator (150) and a geothermal circulation heat exchanger (350). A geothermal heating and cooling system using helical piles for ground reinforcement, characterized by including a geothermal circulation line (340).

Images