KR20220025962A - Water collecting unit cleaning device for geothermal heat pump system and control method thereof - Google Patents

Abstract

The present invention relates to a geothermal heat pump system which comprises: a heat pump unit having a pair of heat exchangers, a compressor, a four-way valve, and an expansion valve; a buried pipe buried in the ground and storing underground water; a hot water tank storing hot water introduced to the heat pump and exchanging the heat with the heat pump unit; a cold water tank storing cold water introduced to the heat pump and exchanging the heat with the heat pump unit; a hot water coil installed in a building and exchanging the heat with the hot water tank; and a cold water coil installed in the building and exchanging the heat with the cold water tank. The present invention reduces an amount of power consumption required for the heat pump.

Description

Geothermal heat pump system and its control method {Water collecting unit cleaning device for geothermal heat pump system and control method thereof}

The present invention relates to a geothermal heat pump system and a method for controlling the same.

In general, as an energy source used for heating and cooling, fossil fuels such as coal, oil, natural gas, or the like, or electric power energy produced using these fossil fuels or nuclear power is mainly used. However, fossil fuels have the disadvantage of polluting water quality and the environment due to various pollutants generated in the combustion process. Among these alternative energies, research on wind power, solar heat and geothermal energy, which have infinite energy sources, and heating and cooling devices using them are used. These energy sources have the advantage of obtaining energy without affecting air pollution and climate change. On the other hand, there is a disadvantage that the energy density is very low.

As the depletion of fossil energy and environmental pollution problems have emerged, research and development on the use of clean energy, i.e., natural energy such as solar heat, geothermal heat, and wind power, is being actively conducted. The use of systems that do this is increasing.

A heating/cooling system using a heat pump that transfers a low-temperature heat source to a high temperature by using the heat or condensation heat of a refrigerant or transfers a high-temperature heat source to a low temperature has the advantage of being able to perform both cooling and heating in one system.

According to the above advantages, the cases of installing a heating and cooling system using a heat pump where cooling and heating are required are increasing.

In the case of the existing geothermal heat pump system, groundwater is directly introduced into the pipe line provided inside the heat pump, and the water circulating the external cold and hot water coil is also directly introduced through the pipe line provided inside the heat pump, and then the two are heat exchanged. have been using

In this case, since the amount of heat to be exchanged per unit time in the heat pump is large, the capacity of the heat pump needs to be increased unnecessarily, or excessive power is required to drive the compressor inside the heat pump.

In addition, when hot water of a high temperature is instantaneously introduced into the heat pump, an overload occurs inside the heat pump and the entire system is stopped, often causing a serious problem.

For this reason, there is a demand for means for alleviating such thermal shock.

Numerous papers and patent documents are referenced throughout this specification and their citations are indicated. The disclosures of the cited papers and patent documents are incorporated herein by reference in their entirety to more clearly describe the level of the technical field to which the present invention pertains and the content of the present invention.

The inventors of the present invention have made intensive research efforts to develop a geothermal heat pump system having superior thermal efficiency compared to the existing geothermal heat pump system.

An object of the present invention is to ensure homeostasis of the system at a high level by controlling the amount of heat introduced into the heat pump.

Another object of the present invention is to reduce the amount of power required for a heat pump.

Other objects and advantages of the present invention will become more apparent from the following detailed description of the invention, claims and drawings.

The present invention provides a heat pump unit having a pair of heat exchangers, a compressor, a four-way valve and an expansion valve; a landfill pipe that is buried underground and stores groundwater; a hot water tank storing hot water flowing into the heat pump unit and exchanging heat with the heat pump unit; a cold water tank storing cold water flowing into the heat pump unit and exchanging heat with the heat pump unit; a hot water coil installed in a building and exchanging heat with the hot water tank; and a cold water coil installed in a building and exchanging heat with the cold water tank.

According to an aspect of the present invention, a first flow valve and a first circulation pump may be provided between the hot water tank and the heat pump unit.

According to an aspect of the present invention, a second flow valve and a third circulation pump may be provided between the cold water tank and the heat pump unit.

According to an aspect of the present invention, a first conduit, a second conduit, and a third conduit forming a flow path circulating the buried pipe and the hot water tank; a sixth conduit and a seventh conduit forming a flow path for circulating the first conduit connected to the buried pipe and the cold water tank; and a first three-way valve provided in the first pipeline, wherein the seventh pipeline may be connected between the first three-way valve and the cold water tank.

According to an aspect of the present invention, an eighth conduit, a ninth conduit forming a flow path circulating the cold water coil and the cold water tank; and a fourth three-way valve provided in the ninth conduit; and a seventh conduit connecting the fourth three-way valve and the first three-way valve.

According to an aspect of the present invention, an eighth conduit, a ninth conduit forming a flow path circulating the cold water coil and the cold water tank; and a sixth three-way valve provided in the eighth conduit, wherein the first conduit may be connected to the eighth conduit through the sixth three-way valve.

According to an aspect of the present invention, a sixth pipe connecting the sixth three-way valve and the first pipe; and a fifth three-way valve provided in the sixth conduit and connected to the first conduit and the third conduit.

According to one aspect of the present invention, the fourth circulation pump provided in the seventh pipe; may further include.

According to an aspect of the present invention, a first conduit, a second conduit, and a third conduit forming a flow path circulating the buried pipe and the hot water tank; a sixth conduit and a seventh conduit forming a flow path for circulating the first conduit connected to the buried pipe and the cold water tank; a fourth conduit and a fifth conduit forming a flow path circulating the hot water coil and the cold water tank; and a second three-way valve provided in the second pipeline, wherein the fifth pipeline may be connected between the second three-way valve and the hot water tank.

According to an aspect of the present invention, a third three-way valve provided in the third pipeline may be further included, and the fourth pipeline may be connected between the third three-way valve and the hot water tank.

According to one aspect of the present invention, a third circulation pump provided in the third pipe; may further include.

According to an aspect of the present invention, it is installed outside the building, and a blower for sucking outside air; further comprising, the hot water coil may be installed outside the building than the cold water coil.

According to an aspect of the present invention, at least one of the hot water tank and the cold water tank may be a laminar flow tank.

The present invention has the effect of ensuring the homeostasis of the system at a high level by controlling the amount of heat flowing into the heat pump.

The present invention has the effect of reducing the amount of power required for the heat pump.

1 is a schematic diagram of a geothermal heat pump system according to the present invention.
2 illustrates a state in which the geothermal heat pump system is driven in a cooling mode.
3 illustrates a state in which the geothermal heat pump system is driven in a heating mode.
4 illustrates a state in which the geothermal heat pump system is driven in a dehumidifying mode.

Since the present invention can apply various transformations and can have various embodiments, specific embodiments are illustrated in the drawings and described in detail. However, this is not intended to limit the present invention to specific embodiments, and should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention. In describing the present invention, if it is determined that a detailed description of a related known technology may obscure the gist of the present invention, the detailed description thereof will be omitted.

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

First, an overall configuration of a geothermal heat pump system according to an embodiment of the present invention will be described with reference to FIG. 1 .

A geothermal heat pump system according to an embodiment of the present invention includes a heat pump unit 10 having a pair of heat exchangers, a compressor, a four-way valve and an expansion valve, a buried pipe 40 buried in the ground and storing groundwater, and the A hot water tank 30 that stores hot water circulating in the heat pump unit 10 and exchanges heat with the heat pump unit, and a cold water tank that stores cold water circulating in the heat pump unit 10 and exchanges heat with the heat pump unit (20), a hot water coil (60) installed in a building and exchanging heat with the hot water tank (30), a cold water coil (70) installed in a building and exchanging heat with the cold water tank (20), and the hot water coil installed in a building (60) and the cold water coil 70 may include a blower 80 for sucking in the outside air.

The hot water tank 30 is a laminar flow tank, and the temperature difference between the uppermost part and the lowermost part may be about 5-10 degrees Celsius, preferably about 7-8 degrees Celsius, and the upper part is maintained at a higher temperature than the lower part. can be

The laminar flow type hot water tank 30 temporarily accommodates the fluid flowing into the heat pump unit 10, while selectively selecting the flow rate of the fluid flowing into the heat pump unit 10 according to the temperature of the fluid or the amount of heat required. can be adjusted with

To this end, a tenth conduit L10 through which a fluid moves between the hot water tank 30 and the heat pump unit 10, a first circulation pump P1 provided in the tenth conduit L10, and the A first flow valve 61 provided at the front end of the first circulation pump P1 installed in the tenth conduit L10 based on the direction in which the fluid flows toward the heat pump unit 10 may be connected. there is.

The reason that the first flow valve 61 is provided at the front end of the first circulation pump P1 is that when the first circulation pump P1 is provided at the rear end, the first flow valve 61 is disposed of the pipeline. This is because the first circulation pump (P1) is overloaded by resistance when a part is selectively closed.

In addition, between the hot water tank 30 and the heat pump unit 10, 11 conduits L11 through which the fluid moves may be further provided.

The middle portion of the tenth conduit L10 may be branched into a plurality of conduits, and a first flow valve 61 is provided in each of the plurality of conduits to selectively open and close the conduits.

Accordingly, it is possible to effectively prevent problems in which the compressor is overloaded or power consumption is rapidly increased as high-temperature hot water is instantaneously introduced into the heat pump unit 10 .

Likewise, the cold water tank 20 is a laminar flow tank, and the temperature difference between the uppermost part and the lowermost part may be about 5 to 10 degrees Celsius, preferably about 7 to 8 degrees Celsius, and the upper part has a higher temperature than the lower part. can be maintained as

The laminar flow type cold water tank 20 temporarily accommodates the fluid flowing into the heat pump unit 10, while selectively selecting the flow rate of the fluid flowing into the heat pump unit 10 according to the temperature of the fluid or the amount of heat required. can be adjusted with

To this end, the cold water tank 20 and the heat pump unit 10 have a thirteenth conduit L13 through which the fluid moves, a second circulation pump P2 provided in the thirteenth conduit L13, and the first A second flow valve 62 provided at the front end of the second circulation pump P2 based on the direction in which the fluid flows toward the heat pump unit 10 may be connected to the 13 pipe line L13.

The reason that the second flow valve 62 is provided at the front end of the second circulation pump P2 is that when the second circulation pump P2 is provided at the rear end, the second flow valve 62 is disposed of the pipeline. This is because the second circulation pump (P2) is overloaded by resistance when a part is selectively closed.

In addition, a moving twelfth conduit L12 may be further provided between the hot water tank 30 and the heat pump unit 10 .

The middle portion of the twelfth conduit L12 may be branched into a plurality of conduits, and a second flow valve 62 is provided in each of the plurality of conduits to selectively open and close the conduits.

Accordingly, it is possible to effectively prevent problems in which the compressor is overloaded or power consumption is rapidly increased as low-temperature cold water is instantaneously introduced into the heat pump unit 10 .

The buried pipe 40 may be provided in an open type in which a part communicates with the outside air, or may be provided in a closed type that does not communicate with the outside air.

On the other hand, in the geothermal heat pump system according to an embodiment of the present invention, the first pipe line (L1) to the ninth pipe line (L9), the first three-way valve (V1) to the sixth three-way valve (V6) for selectively changing the flow path And, it may further include a third circulation pump (P3) and a fourth circulation pump (P4).

Specific features of the present configuration will be described in more detail below with reference to FIGS. 2 to 4 .

First, with reference to FIG. 2 , a path through which a fluid flows during cooling and related detailed configurations will be described.

The eighth conduit L8 and the ninth conduit L9 may form a flow path through which water circulates between the cold water coil 70 and the cold water tank 20, and the eighth conduit L8 is the cold water It may be connected to the ninth conduit L9 through the inner space of the tank 20 .

A fourth three-way valve (V4) is provided in the ninth pipeline (L9) to block the movement of the fluid to the seventh pipeline (L7), and a sixth three-way valve (V6) is provided in the eighth pipeline (L8) It is possible to block the movement of the fluid to the sixth conduit (L6).

The water introduced into the cold water tank 20 through the eighth conduit L8 loses heat from the fluid inside the cold water tank 20 cooled by the heat pump unit 10 and remains cooled in the ninth It may be re-supplied to the cold water coil 70 through the conduit L9.

A third circulation pump P3 may be provided in the ninth conduit L9 to provide negative pressure to the water supplied to the cold water coil 70 .

In addition, the first pipe line (L1) is inserted into the buried pipe (40) to exchange heat with groundwater, and the second pipe line (L2) and the third pipe line (L3) are the first pipe line (L1) and A flow path circulating the hot water tank may be formed.

The second conduit L2 may pass through the inner space of the hot water tank 30 and be connected to the third conduit L3.

A first three-way valve (V1) and a fifth three-way valve (V5) are provided in the first conduit (L1) to block fluid movement to the fifth conduit (L5) and the sixth conduit (L6), and the second A second three-way valve (V2) is provided in the pipeline (L2) to block fluid movement to the fifth pipeline (L5), and the third pipeline (L3) is provided with a third three-way valve (V3) to It is possible to block the movement of the fluid to the 4 conduit (L4).

After the water flows into the hot water tank 30 through the second pipe line L2, heat is obtained from the fluid inside the hot water tank 30 and is heated through the third pipe line L3. It can move to the pipeline (L1).

Thereafter, the water moving to the first pipe line (L1) releases heat to the groundwater, and then passes through the inside of the hot water tank 30 through the second pipe line (L2) and is re-supplied to the third pipe line (L3). can be

A second circulation pump P2 may be provided in the third conduit L3 to provide negative pressure to the water supplied to the third conduit L3.

Next, Figure 3 With reference, a path through which a fluid flows during heating and related detailed configurations will be described.

The sixth conduit L6 and the seventh conduit L7 may form a flow path circulating the first conduit L1 and the cold water tank, and the water receives heat from the groundwater in the first conduit L1. After being obtained, it is introduced into the cold water tank 20 through the sixth pipe line L6 , and the introduced water may exchange heat with the fluid inside the cold water tank 20 .

A fourth circulation pump P4 may be provided in the seventh conduit L7 to provide power to water.

At this time, the fluid movement of the second conduit L2 may be blocked by the first three-way valve V1, and the fluid movement of the third conduit L3 may be blocked by the fifth three-way valve V5. The fluid movement to the eighth conduit L8 may be blocked by the sixth three-way valve V6, and the fluid movement to the ninth conduit L9 by the seventh three-way valve V7. This can be blocked.

In addition, a seventh conduit (L7) connecting the two may be further provided between the fourth three-way valve (V4) and the first three-way valve (V1), and the fifth three-way valve (V5) and the seventh A sixth conduit L6 connecting the two may be further provided between the three-way valve V7.

Thereafter, the fluid heated by the heat pump unit 10 is transferred to a part of the second pipe line L2, the third pipe line L3, and the fourth pipe line L4 by the second circulation pump P2. and water circulating in the hot water coil 60 and the fifth pipe line L5 may exchange heat.

At this time, the flow of the fluid to the portion connected to the first pipe line L1 of the second pipe line L2 may be blocked by the second three-way valve V2, and by the third three-way valve V3 Fluid movement to a portion of the third conduit L3 connected to the first conduit L1 may be blocked.

Next, a path through which a fluid flows during dehumidification and related detailed configurations will be described with reference to FIG. 4 .

During dehumidification, water flows into the cold water tank 20 from the ninth pipe line L9, loses heat, and is cooled, and thereafter, it may be re-introduced into the cold water coil 70 through the eighth pipe line L8.

At this time, the fourth three-way valve V4 may block the movement of the fluid to the seventh conduit L7, and the sixth three-way valve V6 may block the movement of the fluid to the sixth conduit L6.

Thereafter, the water heated by the heat pump unit 10 is transferred to a part of the third pipe line L3, the fourth pipe line L4, the hot water coil 60 and the water heated by the second circulation pump P2. A portion of the fifth conduit L5 and the second conduit L2 may be circulated.

At this time, the hot water coil 60 is installed outside the building rather than the cold water coil 70 , and the dehumidification process can be performed after first warming the air.

According to the above-described configuration, the present invention can selectively operate cooling, heating, and dehumidification modes as needed with one system, and has an excellent effect of simultaneously using hot water during cooling.

Even if the effect is not described in this specification, the present invention may additionally have different effects of each of the above-described components, and derive a new effect that cannot be seen in the prior art according to the organic coupling relationship between each of the above-described components can do.

In addition, the embodiments shown in the drawings may be modified and implemented in other forms, and if implemented including the configuration claimed in the claims of the present invention or implemented within the scope of equivalents, it should be regarded as belonging to the scope of the present invention. something to do.

Heat pump unit 10 Hot water tank 20
Cold water tank 30 Landfill pipe 40
Hot water coil 60 Cold water coil 70
Blower 80 No. 1 Pipe L1
Pipeline 2 L2 Pipeline 3 L3
Pipeline 4 L4 Pipeline 5 L5
Pipeline 6 L6 Pipeline 7 L7
Pipeline 8 L8 Pipeline 9 L9
Pipeline 10 L10 Pipeline 11 L11
Pipeline 12 L12 Pipeline 13 L13
1st three-way valve V1
2nd 3-way valve V2 3rd 3-way valve V3
The 4th three-way valve V4 The 5th three-way valve V5
6th three-way valve V6 1st circulation pump P1
2nd circulation pump P2 3rd circulation pump P3
4th circulation pump P4 1st flow valve 61
2nd flow valve 62

Claims (13)

a heat pump unit having a pair of heat exchangers, a compressor, a four-way valve and an expansion valve;
a landfill pipe that is buried underground and stores groundwater;
a hot water tank storing hot water flowing into the heat pump unit and exchanging heat with the heat pump unit;
a cold water tank storing cold water flowing into the heat pump unit and exchanging heat with the heat pump unit;
a hot water coil installed in a building and exchanging heat with the hot water tank; and
A cold water coil installed in a building and exchanging heat with the cold water tank; including
Geothermal heat pump system, characterized in that. The method of claim 1,
A first flow valve and a first circulation pump are provided between the hot water tank and the heat pump unit.
Geothermal heat pump system, characterized in that. 3. The method of claim 2,
A second flow valve and a third circulation pump are provided between the cold water tank and the heat pump unit.
Geothermal heat pump system, characterized in that. The method of claim 1,
a first conduit, a second conduit, and a third conduit forming a flow path circulating the buried pipe and the hot water tank;
a sixth conduit and a seventh conduit forming a flow path for circulating the first conduit connected to the buried pipe and the cold water tank; and
A first three-way valve provided in the first conduit; further comprising,
The 7th pipeline
connected between the first three-way valve and the cold water tank
Geothermal heat pump system, characterized in that. 5. The method of claim 4,
an eighth conduit and a ninth conduit forming a flow path circulating the cold water coil and the cold water tank; and
a fourth three-way valve provided in the ninth conduit; and
A seventh conduit connecting the fourth three-way valve and the first three-way valve; further comprising
Geothermal heat pump system, characterized in that. 5. The method of claim 4,
an eighth conduit and a ninth conduit forming a flow path circulating the cold water coil and the cold water tank; and
A sixth three-way valve provided in the eighth conduit; further comprising,
The first conduit
connected to the eighth conduit through the sixth three-way valve
Geothermal heat pump system, characterized in that. 7. The method of claim 6,
a sixth conduit connecting the sixth three-way valve and the first conduit; and
A fifth three-way valve provided in the sixth conduit and connected to the first conduit and the third conduit; further comprising
Geothermal heat pump system, characterized in that. 5. The method of claim 4,
A fourth circulation pump provided in the seventh conduit; further comprising
Geothermal heat pump system, characterized in that. The method of claim 1,
a first conduit, a second conduit, and a third conduit forming a flow path circulating the buried pipe and the hot water tank;
a sixth conduit and a seventh conduit forming a flow path for circulating the first conduit connected to the buried pipe and the cold water tank;
a fourth conduit and a fifth conduit forming a flow path circulating the hot water coil and the cold water tank; and
A second three-way valve provided in the second conduit; further comprising,
The fifth conduit
connected between the second three-way valve and the hot water tank
Geothermal heat pump system, characterized in that. 10. The method of claim 9,
A third three-way valve provided in the third conduit; further comprising,
The fourth conduit
connected between the third three-way valve and the hot water tank
Geothermal heat pump system, characterized in that. 10. The method of claim 9,
A third circulation pump provided in the third conduit; further comprising
Geothermal heat pump system, characterized in that. The method of claim 1,
A blower that is installed in a building and sucks outside air; further including,
The hot water coil is installed outside the building than the cold water coil.
Geothermal heat pump system, characterized in that. The method of claim 1,
At least one of the hot water tank and the cold water tank is a laminar flow tank
A control method of a geothermal heat pump system, characterized in that.

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