KR101446768B1 - Geothermal Heat Pump System - Google Patents

Abstract

The present invention provides a high-efficiency geothermal heat pump system. The present invention includes an underground heat exchanger that recovers geothermal heat through heat exchange with underground water which is supplied by a pump and circulates along an underground water line; a first heat exchanger where heat exchange occurs between a refrigerant, which circulates along a refrigerant line in which a refrigerant flow direction is converted depending on a cooling or heating condition, and the underground water; a second heat exchanger where heat exchange occurs between the refrigerant that circulates along the refrigerant line and water that circulates along a pipe which is connected from the outside; a compressor that compresses the refrigerant which circulates along the refrigerant line into high pressure; an expansion valve that throttles the refrigerant which circulates along the refrigerant line into low pressure; and a third heat exchanger where heat exchange occurs between underground water that bypasses along a first bypass line which is connected to the underground water line and a refrigerant that bypasses along a second bypass line or a third bypass line which is connected to the refrigerant line. The underground water that circulates along the first bypass line bypasses to the third heat exchanger side at a front end of the first heat exchanger and flows onto the first heat exchanger side after heat exchange with the refrigerant.

Description

[0001] Geothermal Heat Pump System [0002]

More particularly, the present invention relates to a high-efficiency geothermal heat pump system, and more particularly, to a geothermal heat pump system for a high-efficiency geothermal heat pump system in which groundwater recovered from a groundwater is circulated to a separate heat exchanger before flowing into the outdoor unit, To a high efficiency geothermal heat pump system capable of preventing the operation from being stopped and increasing the efficiency of the system.

In the conventional heat pump system, the refrigerant is changed to a high temperature and a high pressure through a compressor during a cooling operation, the high temperature and high pressure refrigerant passes through the outdoor heat exchanger through the four-way valve, and is heat exchanged with the outside air. Then, the refrigerant at low temperature and high pressure is changed to low temperature and low pressure after passing through the expansion valve, and is heat-exchanged in the indoor heat exchanger, and the indoor air is cooled and transferred to the compressor.

During heating, the refrigerant passing through the compressor is supplied to the indoor heat exchanger by the operation of the four-way valve to heat the room. The refrigerant that has passed through the indoor heat exchanger flows through the expansion valve, And a heat exchanger for heating is additionally provided between the compressor connected through the four-way valve and the indoor heat exchanger, and a hot-water heat pump system for exchanging heat between high-temperature and high-pressure refrigerant with hot water has been developed.

That is, the heat pump system described above is a system in which a four-way valve is directly connected to a compressor and the refrigerant cools or heats the room through heat exchange with the outdoor unit and the indoor unit.

On the other hand, researches on a geothermal heat pumping system for enhancing the performance of the entire system using geothermal heat on the outdoor side have been actively conducted.

That is, the refrigerant and the ground water are heat-exchanged at the outdoor unit side to heat the heat obtained through the heat exchange in the indoor unit through the heat exchange with the ground water.

However, in the conventional heat pump system using geothermal heat, when the temperature of the geothermal water flowing into the outdoor unit of the winter season falls below 5 degrees, there is a problem that the operation of the entire system is stopped due to the occurrence of the frost in the condenser.

KR 2013-0119056 A

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above problems, and it is an object of the present invention to provide an air conditioner which bypasses the groundwater recovered from the ground to the side of the outdoor heat exchanger before flowing into the outdoor heat exchanger, The present invention is to provide a highly efficient geothermal heat pump system which can prevent the water from being stopped.

The present invention also provides a highly efficient geothermal heat pump system capable of increasing the efficiency of the system by compensating the temperature of the groundwater through heat exchange between the refrigerant and the groundwater at the heat exchanger side except for the indoor unit in the standby mode during cooling or heating operation .

According to an aspect of the present invention, there is provided an underground heat exchanger comprising: an underground heat exchanger supplied with a pump and recovering geothermal heat through heat exchange with groundwater circulated along a groundwater line; A first heat exchanger in which heat exchange between the refrigerant circulating along the refrigerant line in which the flow direction of the refrigerant is changed according to the cooling or heating conditions and the ground water occurs; A second heat exchanger in which heat exchange is performed between refrigerant circulated along the refrigerant line and water circulated along a pipe connected from the outside; A compressor for compressing the refrigerant circulated along the refrigerant line to a high pressure; An expansion valve for exchanging refrigerant circulated along the refrigerant line at a low pressure; And a third heat exchanger in which heat exchange occurs between the groundwater bypassing along the first bypass line connected to the ground water line and the refrigerant bypassed along the second bypass line or the third bypass line connected to the refrigerant line And the groundwater circulated along the first bypass line is bypassed from the front end of the first heat exchanger to the third heat exchanger and flows into the first heat exchanger after heat exchange with the refrigerant occurs. Provides a geothermal heat pump system.

The second bypass line may be provided on a refrigerant line connecting the expansion valve and the second heat exchanger, and the third bypass line may be provided on a refrigerant line connecting the compressor and the second heat exchanger.

Further, in the cooling operation, the ground water flowing into the third heat exchanger along the first bypass line flows into the third heat exchanger through the third bypass line after the heat exchange with water in the second heat exchanger, The temperature can be lowered through the heat exchange of the heat exchanger.

In addition, the groundwater flowing into the third heat exchanger along the first bypass line during the heating operation flows to the third heat exchanger through the second bypass line after heat exchange with water in the second heat exchanger occurs The temperature can be raised through the heat exchange of the heat exchanger.

Also, a first valve may be provided on the underground water line so that the amount of underground water bypassed to the first bypass line may be adjusted.

The first valve may adjust the amount of groundwater bypassed to the first bypass line in accordance with the temperature of the groundwater measured through the temperature sensor disposed on the front side of the first heat exchanger.

Further, the refrigerant circulated along the refrigerant line in the standby state of the cooling or heating operation is changed in the direction opposite to the flow direction of the refrigerant during the cooling or heating operation and is blocked from flowing into the second heat exchanger side, 3 It can only flow into the heat exchanger side.

In addition, a second valve is provided on the refrigerant line connecting the expansion valve and the second heat exchanger, a third valve is provided on the second bypass line connecting the third heat exchanger and the refrigerant line, and the compressor and the third And the fourth bypass valve is provided on the third bypass line connecting the heat exchanger so that the second valve, the third valve and the fourth valve may be closed when the cooling or heating operation is in a standby state.

In the cooling operation standby state, the ground water flowing into the third heat exchanger through the first bypass line may rise in temperature through heat exchange with a refrigerant flowing directly to the third heat exchanger after passing through the compressor have.

The groundwater flowing into the third heat exchanger through the first bypass line during the heating operation standby state is lowered through heat exchange with the refrigerant flowing directly to the third heat exchanger after passing through the expansion valve .

According to the present invention, since the groundwater recovered from the ground is circulated to the side of the separate heat exchanger before flowing into the outdoor unit side, heat exchange with the refrigerant occurs, and then flows into the outdoor unit side, thereby preventing the operation from being stopped by the winter There is an advantage that the repair cost can be reduced.

Further, the present invention is advantageous in that the efficiency of the system can be improved by compensating the temperature of the ground water through the heat exchange between the refrigerant and the groundwater on the heat exchanger side except for the indoor unit in the standby mode of cooling or heating operation.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic diagram illustrating a highly efficient geothermal heat pump system in accordance with an embodiment of the present invention. FIG.
FIG. 2 is a schematic view showing the flow direction of the fluid in the cooling mode in FIG. 1; FIG.
FIG. 3 is a schematic view showing a flow direction of a fluid in a cooling mode standby state in FIG. 1; FIG.
FIG. 4 is a schematic view showing the flow direction of the fluid in the heating mode in FIG. 1; FIG.
FIG. 5 is a schematic view showing a flow direction of a fluid in a heating mode standby state in FIG. 1; FIG.

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

In order to facilitate understanding of the present invention, the same reference numerals will be used to denote the same constituent elements even if they are shown in different drawings.

The geothermal heat pump system 100 according to an embodiment of the present invention bypasses the groundwater recovered from the ground to the side of the separate heat exchanger before flowing into the outdoor unit side to cause heat exchange with the refrigerant and then flows into the outdoor unit side, And the temperature of the ground water is compensated by the heat exchange between the refrigerant and the ground water at the other heat exchanger side except for the indoor unit in the standby mode of the cooling or heating operation to increase the efficiency of the system have.

- Whole system

1 to 5, the high efficiency geothermal heat pump system 100 according to an embodiment of the present invention includes an underground heat exchanger 110, a first heat exchanger 120, a second heat exchanger 130, A compressor 150, an expansion valve 160, and a third heat exchanger 140.

The geothermal heat exchanger 110 is composed of a pipe buried in the ground, and the ground water is circulated along the groundwater line 112 extending from the pipe. The groundwater is circulated by the pump 114 provided on the groundwater line 112 and flows into the first heat exchanger 120 along the groundwater line 112 to thereby cool the refrigerant line 180 Heat exchange with the circulating refrigerant occurs.

Accordingly, the geothermal heat exchanger 110 discharges the heat received from the refrigerant in the first heat exchanger 120 during the cooling operation and the geothermal heat absorbed from the ground during the heating operation in the first heat exchanger 120 To the refrigerant.

At this time, the groundwater line 112 is connected to the first bypass line 181 through the first valve 171. The first bypass line 181 has its inlet side and outlet side connected to the groundwater line 112, respectively. Accordingly, the groundwater discharged from the geothermal heat exchanger 110 is bypassed to the third heat exchanger 140 along the first bypass line 181 to perform heat exchange with the refrigerant in the third heat exchanger 140 And flows into the ground water line 112 side along the first bypass line 181 again.

When the operation load of the system increases, the first bypass line 181 controls the first valve 171 so that the groundwater passing through the underground heat exchanger 110 is not directly moved to the first heat exchanger 120 side After first heat exchange with the refrigerant which is moved to the third heat exchanger 140 along the first bypass line 181 and moved along the second bypass line 182 or the third bypass line 183, To be moved toward the base 120 side.

The first bypass line 181 is provided in the ground water line 112 connected to the inlet side of the first heat exchanger 120.

The groundwater heat exchanged in the geothermal heat exchanger 110 is bypassed to the third heat exchanger 140 along the first bypass line 181 before flowing into the first heat exchanger 120, Exchanges heat with the refrigerant flowing into the heat exchanger 140 side, and then moves to the first heat exchanger 120 side.

The first valve 171 allows or prevents the groundwater circulated along the underground water line 112 from being moved to the third heat exchanger 140 side, It controls the amount of groundwater.

A temperature sensor 190 is provided on the underground water line 112 connecting the first valve 171 and the first heat exchanger 120 so that the underground water flowing into the first heat exchanger 120 Allow the temperature to be measured.

The first valve 171 is connected to the third heat exchanger 140 through the first bypass line 181 when the temperature of the groundwater flowing into the first heat exchanger 120 is higher or lower than the set temperature, The amount of ground water that is always set to the set temperature is introduced into the first heat exchanger 120 side by appropriately adjusting the amount of the groundwater bypassed to the first heat exchanger 120 and the amount of the groundwater that moves directly from the ground heat exchanger 110 to the first heat exchanger 120 .

Here, the first valve 171 may be provided with various valves such as a check valve and an electromagnetic valve. The first valve 171 may be a three-way valve so that the amount of the groundwater flowing directly into the first heat exchanger 120 It is preferable that the amount of the groundwater bypassed to the third heat exchanger 140 can be appropriately adjusted.

 The refrigerant in which the heat exchange with the groundwater in the first heat exchanger 120 and the third heat exchanger 140 occurs is connected to the refrigerant line 180 (180) connecting the first heat exchanger 120 and the second heat exchanger 130 ).

The refrigerant line 180 is provided with a compressor 150 for compressing refrigerant of a low temperature and a low pressure into refrigerant of a high temperature and a high pressure as in a normal high efficiency geothermal heat pump system, And a four-way valve 178 for switching the flow direction of the refrigerant switched from the compressor 150 to the high-temperature and high-pressure state Respectively.

The refrigerant circulated along the refrigerant line 180 between the first heat exchanger 120 and the second heat exchanger 130 is converted into a high temperature and a high pressure by the compressor 150 and is supplied to the first heat exchanger 120, And the second heat exchanger 130 and is then switched to the low temperature and low pressure by the expansion valve 160 to form a repetitive cycle of performing heat exchange in the second heat exchanger 130 and the first heat exchanger 120 .

The refrigerant circulated along the refrigerant line 180 is circulated by the four-way valve 178 so that the first heat exchanger 120 can heat the geothermal water supplied from the pump 114, And is converted into a condenser that releases heat to the ground water supplied by the pump 114 during cooling.

Further, by switching the direction of the refrigerant occurring in the four-way valve 178, the second heat exchanger 130 is switched to a condenser that releases the heat of the refrigerant supplied from the compressor 150 at the time of heating, It is converted to an evaporator that absorbs external heat.

At this time, the second bypass line 182 and the third bypass line 183 are provided so that the refrigerant circulated along the refrigerant line 180 can bypass the third heat exchanger 140 when the operation load increases .

The second bypass line 182 is connected to the second valve 172, the third valve 173 and the fifth valve 173 on the refrigerant line 180 connecting the expansion valve 160 and the second heat exchanger 130, The refrigerant having passed through the second heat exchanger 130 in the heating mode is bypassed to the third heat exchanger 140 and is heat-exchanged with the underground water bypassed through the first bypass line 181 So that it can flow into the rear expansion valve 160 side.

The third bypass line 183 is connected to the refrigerant line 180 connecting the compressor 150 and the second heat exchanger 130 with a fourth valve 174, a sixth valve 176, The refrigerant that has passed through the second heat exchanger 130 in the cooling mode is bypassed to the third heat exchanger 140 and flows through the first bypass line 181 to the underground water bypassed through the first bypass line 181, And then flows into the compressor 150 side.

In the heating mode, the second valve 172, the fourth valve 174 and the seventh valve 177 are in the closed state and the third valve 173, the fifth valve 175, 176 are open. On the contrary, in the cooling mode, the second valve 172, the fourth valve 174 and the seventh valve 177 are in an open state and the third valve 173, the fifth valve 175, 176 are closed.

As described above, the high-efficiency geothermal heat pump system 100 according to an embodiment of the present invention controls the opening and closing states of the valves when the operation load increases in the cooling or heating operation, The refrigerant bypasses the third heat exchanger 140 via the second bypass line 182 or the third bypass line 183 to perform heat exchange with the groundwater bypassed along the first bypass line 181, .

Meanwhile, each component used in the high-efficiency geothermal heat pump system 100 of the present invention may be provided with a control unit (not shown) for controlling the components by an electric signal.

- cooling mode

FIG. 2 is a schematic diagram showing the operation state of the high-efficiency geothermal heat pump system 100 in the cooling mode according to the embodiment of the present invention.

The solid line represents the groundwater W and the open state where the refrigerant C is moved. The dotted line represents the groundwater W, And the refrigerant (C) does not move.

In the normal cooling mode operation, the third valve 173, the fourth valve 174, the fifth valve 175 and the seventh valve 177 are in a closed state and the second valve 172 and the sixth valve 176 are open and the first valve 171 is closed only on the first bypass line 181 so that all the groundwater can be moved from the underground heat exchanger 110 to the first heat exchanger 120 side.

Accordingly, the refrigerant whose temperature has risen through heat exchange with the circulating water circulating along the water supply line 184 in the second heat exchanger 130 is moved to the first heat exchanger 120 side via the compressor 150 And is then transferred to the second heat exchanger 130 via the expansion valve 160 after being cooled by heat exchange with groundwater circulated along the afterground water line 112. [ Such a cooling mode is a general description, and a detailed description thereof will be omitted.

Thereafter, when the system is overloaded due to the continuous cooling mode, the sixth valve 176 is switched to the closed state and the fourth valve 174 and the seventh valve 177 are closed And the refrigerant having passed through the second heat exchanger 130 is diverted to the third heat exchanger 140 side via the third bypass line 183. In addition, the groundwater passing through the geothermal heat exchanger 110 is also controlled by the first valve 171 so that part or all of the geothermal water is moved toward the third heat exchanger 140 through the first bypass line 181.

Accordingly, in the third heat exchanger 140, the groundwater bypassed along the first bypass line 181 from the underground water line 112 and the underground water bypassed through the second bypass line 130 after passing through the second heat exchanger 130 The temperature of the ground water is lowered and then flows into the first heat exchanger 120 side, the temperature of the refrigerant rises, and then the refrigerant is moved to the compressor 150 side.

As a result, the temperature of the refrigerant flowing into the compressor 150 through the heat exchange on the side of the third heat exchanger 140 rises and the temperature of the refrigerant flowing into the expansion valve 160 side is lowered compared to the normal cooling mode, And the expansion efficiency of the expansion valve 160 are respectively increased.

- Air conditioning mode

Meanwhile, in the high efficiency geothermal heat pump system 100 according to the embodiment of the present invention, when the indoor temperature reaches the proper temperature through continuous heat exchange in the second heat exchanger 130, continuous cooling operation is performed So that it is switched to the standby mode.

That is, as shown in FIG. 3, the second valve 172, the third valve 173 and the fourth valve 174 are closed, and the fifth valve 175, the sixth valve 176, The seventh valve 177 is opened and the first valve 171 moves the groundwater to the third heat exchanger 140 through the first bypass line 181 and circulates the refrigerant through the four- Converts the direction reversely.

Accordingly, the refrigerant does not move to the second heat exchanger 130 side but flows into the refrigerant line 180 through the part 180a of the refrigerant line 180, the part 182a of the second bypass line 182, and a part of the third bypass line 183 The third heat exchanger 140 and the expansion valve 160 in the order of the first heat exchanger 120, the compressor 150, the third heat exchanger 140 and the expansion valve 160. The groundwater is circulated by the pump to the underground heat exchanger 110, The third heat exchanger 140, and the first heat exchanger 120 in this order.

That is, in the cooling standby mode, the third heat exchanger serves as a condenser and the underground heat exchanger 110 serves as an evaporator.

Therefore, the ground water cooled through the heat exchange with the refrigerant in the first heat exchanger 120 is moved to the underground heat exchanger 110 side to cool the ground, thereby recovering the temperature of the ground, The overall cooling efficiency can be improved.

- heating mode

FIG. 4 is a schematic view showing the operation state of the high-efficiency geothermal heat pump system 100 in the heating mode according to the embodiment of the present invention.

The third valve 173, the fourth valve 174, the fifth valve 175 and the seventh valve 177 are in the closed state and the second valve 172 and the sixth valve 176 are open and the first valve 171 is closed only on the first bypass line 181 so that all the groundwater can be moved from the underground heat exchanger 110 to the first heat exchanger 120 side.

Accordingly, the refrigerant whose temperature has dropped through the heat exchange with the circulating water circulating along the water supply line 184 in the second heat exchanger 130 is directed toward the first heat exchanger 120 via the expansion valve 160 And then moved to the side of the second heat exchanger 130 via the compressor 150 after the temperature is increased through heat exchange with the groundwater circulating along the underground water line 112. [ Such a heating mode is a general description, and a detailed description thereof will be omitted.

4, the second valve 172 is switched to the closed state, and the third valve 173 and the fifth valve 175 are closed, as shown in FIG. 4, when the system is overloaded by the continuous heating mode. And the refrigerant having passed through the second heat exchanger 130 is diverted to the third heat exchanger 140 side via the second bypass line 182. [ In addition, the groundwater passing through the geothermal heat exchanger 110 is also controlled by the first valve 171 so that part or all of the geothermal water is moved toward the third heat exchanger 140 through the first bypass line 181.

In the third heat exchanger 140, the ground water bypassed along the first bypass line 181 from the underground water line 112 and the second bypass line 182 after passing through the second heat exchanger 130 The temperature of the ground water rises and flows into the first heat exchanger 120. The temperature of the coolant is lowered and then the refrigerant is moved to the expansion valve 160 side.

As a result, the temperature of the refrigerant flowing into the expansion valve 160 side through the heat exchange at the third heat exchanger 140 side is lowered and the temperature of the refrigerant flowing into the compressor 150 side rises compared to the normal heating mode.

In addition, the groundwater flowing into the first heat exchanger 120 is also heated by the heat exchange with the refrigerant in the third heat exchanger 140, thereby preventing the risk of winter wave occurrence, do.

In addition, since the inlet temperature flowing into the first heat exchanger 120 is increased, the efficiency of the first heat exchanger 120 can be further increased.

- Heating mode

Meanwhile, in the high-efficiency geothermal heat pump system 100 according to the embodiment of the present invention, if the indoor temperature reaches the proper temperature through continuous heat exchange in the second heat exchanger 130, continuous heating operation is performed So that it is switched to the standby mode.

5, the second valve 172, the third valve 173 and the fourth valve 174 are closed, and the fifth valve 175, the sixth valve 176, The seventh valve 177 is opened and the first valve 171 moves the groundwater to the third heat exchanger 140 through the first bypass line 181 and circulates the refrigerant through the four- Converts the direction reversely.

Accordingly, the refrigerant does not move to the second heat exchanger 130 side but flows into the refrigerant line 180 through the part 180a of the refrigerant line 180, the part 182a of the second bypass line 182, and a part of the third bypass line 183 The first heat exchanger 120, the expansion valve 160, the third heat exchanger 140 and the compressor 150 are circulated in the order of the first heat exchanger 183a, The third heat exchanger 140, and the first heat exchanger 120 in this order.

That is, in the heating standby mode, the third heat exchanger 140 functions as an evaporator and the underground heat exchanger 110 functions as a condenser.

Therefore, the groundwater whose temperature has been raised by the heat exchange with the refrigerant in the first heat exchanger 120 is moved to the subcooling heat exchanger 110 side to heat the ground to restore the temperature of the ground, The conversion efficiency can be improved.

According to the present invention, since the groundwater recovered from the ground is circulated to the side of the separate heat exchanger before flowing into the outdoor unit side, heat exchange with the refrigerant occurs, and then flows into the outdoor unit side, thereby preventing the operation from being stopped by the winter There is an advantage that the repair cost can be reduced.

Further, the present invention is advantageous in that the efficiency of the system can be improved by compensating the temperature of the ground water through the heat exchange between the refrigerant and the groundwater on the heat exchanger side except for the indoor unit in the standby mode of cooling or heating operation.

While the foregoing is directed in detail to a particular embodiment of the invention with reference to the drawings, it is not intended to limit the invention to this specific construction. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. Particularly, in the case of the second to seventh valves, the number of installation can be appropriately adjusted by using a three-way valve. It is to be expressly understood, however, that equivalents, modifications and substitutions through such simple design variations or modifications are expressly included within the scope of the present invention.

100: High efficiency geothermal heat pump system
110: underground heat exchanger 112: underground water line
114: pump 120: first heat exchanger
130: second heat exchanger 140: third heat exchanger
150: compressor 160: expansion valve
171: first valve 172: second valve
173: third valve 174: fourth valve
175: fifth valve 176: sixth valve
177: seventh valve 178: four way valve
180, 180a: refrigerant line 181: first bypass line
182,182a: second bypass line 183: third bypass line
184: Water supply line 190: Temperature sensor
W: Groundwater C: Refrigerant

Claims (10)

An underground heat exchanger supplied by a pump and recovering geothermal heat through heat exchange with groundwater circulated along a ground water line;
A first heat exchanger in which heat exchange between the refrigerant circulating along the refrigerant line in which the flow direction of the refrigerant is changed according to the cooling or heating conditions and the ground water occurs;
A second heat exchanger in which heat exchange is performed between refrigerant circulated along the refrigerant line and water circulated along a pipe connected from the outside;
A compressor for compressing the refrigerant circulated along the refrigerant line to a high pressure;
An expansion valve for exchanging refrigerant circulated along the refrigerant line at a low pressure; And
And a third heat exchanger in which heat exchange occurs between the groundwater bypassing along the first bypass line connected to the ground water line and the refrigerant bypassed along the second bypass line or the third bypass line connected to the refrigerant line ,
The refrigerant circulated along the refrigerant line in the standby state of the cooling or heating operation is converted into a direction opposite to the flow direction of the refrigerant during the cooling or heating operation and is prevented from flowing into the second heat exchanger side, And then,
A second valve is provided on a refrigerant line connecting the expansion valve and the second heat exchanger, a third valve is provided on a second bypass line connecting the third heat exchanger and the refrigerant line, and the compressor and the third heat exchanger And the fourth valve is provided on the third bypass line to connect the second valve, the third valve and the fourth valve when the cooling or heating operation is in a standby state. The method according to claim 1,
Wherein the second bypass line is provided on a refrigerant line connecting the expansion valve and the second heat exchanger and the third bypass line is provided on a refrigerant line connecting the compressor and the second heat exchanger, Heat pump system. 3. The method of claim 2,
The groundwater flowing into the third heat exchanger along the first bypass line during the cooling operation is heat exchanged with the refrigerant flowing into the third heat exchanger along the third bypass line after heat exchange with water in the second heat exchanger occurs, And the temperature is lowered through the heat exchanger. 3. The method of claim 2,
The groundwater introduced into the third heat exchanger along the first bypass line during the heating operation is subjected to heat exchange with the refrigerant flowing into the third heat exchanger along the second bypass line after heat exchange with water in the second heat exchanger occurs, Wherein the temperature of the heat pump is increased by the heat pump. The method according to claim 1,
Wherein a first valve is provided on the underground water line to regulate the amount of underground water bypassed to the first bypass line. 6. The method of claim 5,
Wherein the first valve adjusts the amount of groundwater bypassed to the first bypass line in accordance with the temperature of the groundwater measured through the temperature sensor disposed on the front side of the first heat exchanger, Pump system. delete delete The method according to claim 1,
The groundwater flowing into the third heat exchanger through the first bypass line during the cooling operation standby state is increased in temperature through heat exchange with a refrigerant flowing directly to the third heat exchanger after passing through the compressor High efficiency geothermal heat pump system. The method according to claim 1,
The ground water flowing into the third heat exchanger through the first bypass line during the heating operation standby state is lowered in temperature through heat exchange with the refrigerant flowing directly to the third heat exchanger after passing through the expansion valve High efficiency geothermal heat pump system.

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