KR102047974B1 - High efficiency geothermal heating and cooling system capable of generating hot water - Google Patents

Abstract

According to the present invention, a high-efficiency geothermal heating and cooling system capable of producing hot water comprises: a geothermal heat pump (10) to use heat transferred from an underground heat exchanger (30) to perform an operation of supplying cooling and heating to a first user (100); a first hot water generator (20) to use a portion of waste heat generated by the operation of supplying cooling and heating of the geothermal heat pump (10) to be transferred towards the underground heat exchanger (30) from the geothermal heat pump (10) as a heat source to perform a hot water supply operation to a second user (200) separately from the geothermal heat pump (10); and a second hot water generator (50) to use a portion of heat generated by the geothermal heat pump (10) to be transferred to the first user (100) as a heat source to perform a hot water supply operation to the second user (200) separately from the geothermal heat pump (10).

Description

High efficiency geothermal heating and cooling system capable of producing hot water {HIGH EFFICIENCY GEOTHERMAL HEATING AND COOLING SYSTEM CAPABLE OF GENERATING HOT WATER}

The present invention relates to a high-efficiency geothermal heating and cooling system capable of producing hot water, and more particularly, to a high-efficiency geothermal heating and cooling system for efficiently producing hot water for hot water supply by utilizing waste heat of a water-to-air air-conditioning system again.

In general, the conventional geothermal heat pump is operated independently of the water heating system of the air-to-air system for heating and cooling the water and the hot water system of the water object system for hot water.

In FIG. 1, an air-conditioning and heating system of a water-to-air system for cooling and cooling indoors is shown. FIG. This will be described in detail as follows.

Referring to FIG. 1, a water-to-air air-conditioning system includes a first heat pump 1 and a second heat pump 2, and the first heat pump 1 and the second heat pump 2 are each made of a first air pump 1 and a second heat pump 2. A first heat exchanger 3, a second heat exchanger 4, a compressor 5, and an expansion valve 6 are provided. Here, the first heat exchanger 3 of the first heat pump 1 and the first heat exchanger 3 of the second heat pump 2 exchange heat with a heat transfer medium circulating in the room, and the first heat pump 1 The second heat exchanger (4) and the second heat exchanger (4) of the second heat pump (2) exchange heat with the heat transfer medium circulated to the underground heat exchanger (4) embedded in the ground.

Here, when the cooling and heating system is operated in the cooling mode, the refrigerant of the first and second heat pumps is expanded in the expansion valve (4), the first heat exchanger (1), the compressor (3) and the second heat exchanger (2). 2 circulates in the path of the heat exchanger 2, releases the heat of the refrigerant from the second heat exchanger 2, and absorbs heat in the first heat exchanger 1. Therefore, the heat transfer medium circulating in the room releases heat from the first heat exchanger 1 to cool the room. On the other hand, the heat radiated from the second heat exchanger 2 is transferred to the heat transfer medium circulating to the underground heat exchanger 5, and the heated heat transfer medium releases heat from the ground.

On the contrary, when the heating and cooling system is operated in the heating mode, the refrigerant of the first and second heat pumps is transferred from the second heat exchanger 2 to the compressor 3, the first heat exchanger 1, the expansion valve 4 and the first heat pump. 2 It circulates in the path | route of the heat exchanger 2, discharge | releases the heat of a refrigerant | coolant from the 1st heat exchanger 1, and heat-absorbs in the 2nd heat exchanger 2. As shown in FIG. Therefore, the heat transfer medium circulating in the room heats the room by absorbing heat in the first heat exchanger (1). On the other hand, the refrigerant is endothermic in the second heat exchanger (2), the heat transfer medium circulating in the underground heat exchanger (5) absorbs heat in the ground and transfers heat from the second heat exchanger (2) to the refrigerant.

Such a conventional water-to-air air-conditioning system is operated separately from the water-based hot water supply system described below.

2, the water object type hot water supply system includes a heat pump. The heat transfer medium of the hot water heat exchanger 6 absorbs heat in the first heat exchanger 7 of the heat pump, and the water of the hot water tank 9 heats the heat in the hot water heat exchanger 6, and the second heat pump. The heat transfer medium circulating through the heat exchanger 8 and the underground heat exchanger 5 embedded in the ground endotherm in the ground heat exchanger 5.

Specifically, when the water object type hot water supply system is operated, the heat transfer medium of the underground heat exchanger 5 is heated in the ground, and the heated heat transfer medium transfers heat to the refrigerant in the second heat exchanger 8 of the heat pump. In the first heat exchanger 7 of the heat pump, the refrigerant transfers heat to the heat transfer medium of the hot water heat exchanger 6. Then, the water in the hot water tank 9 absorbs heat of the refrigerant while circulating the hot water heat exchanger 6, and then flows into the hot water tank 9 to raise the temperature of the hot water.

However, in the prior art, the water-to-air air-conditioning system cannot produce hot water because the load side is used for cooling or heating in a refrigerant circulation method. Therefore, in order to produce hot water, the above water object type hot water supply system had to be a separate system.

In addition, the conventional water-air air-conditioning system is a simple heat dissipation of heat absorbed from the load side to the heat source side during the cooling operation of the summer, it is possible to produce hot water by utilizing the waste heat radiated in the water-air air-conditioning system. There was no effective means in place.

Accordingly, since the hot water cannot be produced in the conventional water pump air-heating / heating system, when floor heating is required, there is an inconvenience of installing a separate water-object type hot water supply system.

Patent No. 10-0994572, Registered Date: November 9, 2010, Name of the Invention: Air-conditioning system using geothermal source

An object of the present invention is to provide a high-efficiency geothermal heating and cooling system for efficiently producing hot water for hot water supply by utilizing the waste heat of the water-to-air heat pump again.

This object is assumed that the water-to-air heat pump according to the present invention is configured to not only perform indoor heating and cooling, but also to produce hot water for hot water supply.

High efficiency geothermal heating and cooling system capable of producing hot water according to an embodiment of the present invention for achieving the above object is a geothermal heat pump that can perform the heating and cooling supply operation for the first demand by using the heat transferred from the ground heat exchange ; A first heat supply and supply operation for a second demand source can be performed separately from the geothermal heat pump by using a part of the waste heat generated by the cooling and heating supply operation of the geothermal heat pump to the ground heat exchanger as a heat source. Hot water generator; And a second hot water generator capable of performing a hot water supply and supply operation to a second demand destination separately from the geothermal heat pump using a portion of heat generated in the geothermal heat pump and delivered to the first demand destination.

In the high-efficiency geothermal heating and cooling system capable of producing hot water according to an embodiment of the present invention, the first hot water generator and the second hot water generator may operate at the same time to perform a hot water supply operation to the second demand destination.

In a highly efficient geothermal heating and cooling system capable of producing hot water according to another exemplary embodiment of the present invention, a part of the waste heat may be branched from a three-way valve of heat source disposed in a pipe between the geothermal heat pump and the underground heat exchanger and transferred to the first hot water generator. have.

In the highly efficient geothermal heating and cooling system capable of producing hot water according to one preferred embodiment of the present invention, a part of the waste hot water discharged from the second demand source is branched from the hot water three-way valve disposed in the pipe between the second hot water generator and the second demand destination. It may be delivered to the second hot water generator.

The high-efficiency geothermal heating and cooling system capable of producing hot water according to one embodiment of the present invention uses a part of heat transferred between the geothermal heat exchanger and the geothermal heat pump as a heat source, and supplies heating and cooling to a third demand source separately from the geothermal heat pump. Auxiliary heat pump capable of performing; And an auxiliary hot water generator capable of performing a hot water supply supply operation to the second demand destination by using a part of the heat generated from the auxiliary heat pump and delivered to the third demand destination as a heat source.

In the highly efficient geothermal heating and cooling system capable of producing hot water according to one preferred embodiment of the present invention, a part of the waste hot water discharged from the second demand source is branched from the hot water three-way valve disposed in the pipe between the auxiliary hot water generator and the second demand source. It can be delivered to the hot water generator.

According to an aspect of the present invention, there is provided a high-efficiency geothermal heating and cooling method capable of producing hot water, including: performing a cooling and heating supply operation to a first demand destination by using heat delivered from an underground heat exchanger in a geothermal heat pump; Part of the waste heat generated from the geothermal heat pump's cooling / heating operation and transferred from the geothermal heat pump to the ground heat exchanger is used as a heat source, and the hot water generator performs a hot water supply operation for the second demand source separately from the geothermal heat pump. Doing; And performing a hot water supply operation for the second demand destination separately from the geothermal heat pump in the second hot water generator using a portion of heat generated in the geothermal heat pump and transmitted to the first demand destination.

According to an exemplary embodiment of the present invention, a high-efficiency geothermal heating and cooling method capable of producing hot water uses a part of heat generated by an auxiliary heat pump and delivered to a third demanding party as a heat source, and supplies hot water to the second demanding customer in the auxiliary hot water generator. It may further comprise the step of performing.

The high-efficiency geothermal heating and cooling method capable of producing hot water according to one preferred embodiment of the present invention includes a geothermal heat pump and / or a first product such that a temperature of a hot water tank storing hot water supplied by a system controller to a second demand source is maintained at a predetermined temperature. It may further comprise the step of controlling the operating state of the hot water generator.

The high-efficiency geothermal heating and cooling method capable of producing hot water according to an exemplary embodiment of the present invention further includes controlling the system controller to operate only the second hot water generator as needed even if the heating / cooling supply operation is not operated for the first demand destination. can do.

In the high-efficiency geothermal heating and cooling method capable of producing hot water according to an embodiment of the present invention, when the hot water supply operation is performed in the first hot water generator, when the calorific value of part of the waste heat in the first hot water generator is not completely absorbed, The heat source three-way valve may further comprise controlling to increase the amount of waste heat delivered to the underground heat exchanger.

According to the problem solving means as described above, the present invention can greatly improve the energy efficiency through the heat used for heating during the heating operation, and also to recover the heat radiated to the underground heat exchanger during the cooling operation.

In addition, it is possible to reuse the waste heat in the water-to-air heat pump to produce hot water, so it is not necessary to add an electric boiler or fossil fuel boiler, etc., which has relatively low energy efficiency in producing hot water.

1 is a conceptual diagram showing a cooling and heating system using a conventional geothermal heat pump.
2 is a conceptual diagram showing a hot water supply system using a conventional geothermal heat pump.
3 is a conceptual diagram schematically showing a highly efficient geothermal heating and cooling system capable of producing hot water according to an embodiment of the present invention.
Figure 4 is a conceptual diagram showing the flow of the refrigerant for producing hot water during the heating operation in the geothermal heating system according to an embodiment of the present invention.
5 is a conceptual diagram showing the flow of the refrigerant for producing hot water during the cooling operation in the geothermal heating and cooling system according to an embodiment of the present invention.
FIG. 6 is a conceptual diagram illustrating a flow of a refrigerant for producing hot water in a geothermal air conditioning system according to an embodiment of the present invention without performing an air conditioning operation.
7 is a diagram schematically showing a geothermal heating and cooling method according to an embodiment of the present invention.

The foregoing objects, features, and advantages will become more apparent from the following examples taken in conjunction with the accompanying drawings.

Specific structural to functional descriptions are merely illustrated for the purpose of describing embodiments in accordance with the inventive concept, and embodiments in accordance with the inventive concept may be embodied in various forms and are described in the specification of the present application. It should not be construed as limited to these.

Embodiments according to the concept of the present invention can be variously modified and have a variety of forms specific embodiments will be illustrated in the drawings and described in detail in the specification of the present application. However, this is not intended to limit the embodiments in accordance with the concept of the present invention to a particular disclosed form, it should be understood to include all changes, equivalents, and substitutes included in the spirit and scope of the present invention.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. As used herein, the terms "comprise" or "have" are intended to indicate that there is a feature, number, step, action, component, part, or combination thereof that is described, and that one or more other features or numbers, It is to be understood that it does not exclude in advance the possibility of the presence or addition of steps, actions, components, parts or combinations thereof.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. Like reference numerals in the drawings denote like elements.

Figure 3 shows the basic configuration of a high-efficiency geothermal heating and cooling system capable of producing hot water according to an embodiment of the present invention. This will be described in detail as follows.

Referring to FIG. 3, the highly efficient geothermal heating and cooling system capable of producing hot water of the present invention may include an underground heat exchanger 30, a geothermal heat pump 10, and a first hot water generator 20.

The underground heat exchanger (30) is a device that is buried in the ground, and can be heat-exchanged with the ground, and since it is generally widely used in the art, a detailed description thereof will be omitted.

The geothermal heat pump 10 is capable of performing a heating and heating operation for the first demand destination 100 by using the heat delivered from the underground heat exchanger 30, and the heat source side that exchanges heat with the underground heat exchanger 30. A heat exchanger 11, a demand-side heat exchanger 15 for exchanging heat with a demand for air conditioning, hot water supply, etc., an expansion valve 12 for expanding a refrigerant circulating inside the geothermal heat pump 10, and a geothermal heat Compressor 13 comprising a compressor 13 for compressing the refrigerant circulating in the pump 10, and a four-sided side 14 for changing the flow direction of the refrigerant circulating inside the geothermal heat pump 10 for the heating and cooling conversion. Thus, the heating and cooling operation for the first demand destination 100 may be performed.

The first hot water generator 20 is a geothermal heat pump (a part of the waste heat generated by the cooling and heating supply operation of the geothermal heat pump 10 and transferred from the geothermal heat pump 10 toward the underground heat exchanger 30 as a heat source). Apart from 10), the hot water supply operation may be performed to the second demand source 200. The first hot water generator 20 preferably performs a hot water supply operation to the second demand source 200, but may also perform a general heating and cooling supply operation.

On the other hand, the first hot water generator 20 may be connected in parallel on the pipe in which the refrigerant flows from the geothermal heat pump 10 to the underground heat exchanger (30). Specifically, one pipe extending from the first hot water generator 20 is connected to a pipe in which a relatively warm refrigerant circulates between the first hot water generator 20 and the geothermal heat pump 10, and the first hot water generator ( One pipe extending from the first hot water generator 20 may be connected to a pipe through which the relatively cool refrigerant circulates between the 20 and the geothermal heat pump 10. However, the configuration is not limited thereto and may be connected in series.

At this time, the refrigerant containing waste heat formed during the heating and cooling operation in the geothermal heat pump 10 passes through the first hot water generator 20 and is then directed to the underground heat exchanger 30.

The first hot water generator 20 may be configured in such a manner that the pipes extending from the geothermal heat pump 10 and the pipes extending from the second demand 200 are adjacent to each other and heat exchanged. However, the first hot water generator 20 may be configured as a separate heat pump having a heat exchanger, a compressor, an expansion valve, and the like.

Here, for example, in a space such as a home, the first demand destination 100 may be a space such as a living room in which air-conditioning of the indoor air is performed by using an air conditioner such as a heater or an air conditioner, and the second demand destination 200 is It may be a space such as a bath in which hot water is performed.

On the other hand, a part of the waste heat generated by the cooling and heating supply operation of the geothermal heat pump 10 is branched from the heat source three-way valve 41 disposed in the pipe between the geothermal heat pump 10 and the underground heat exchanger (30) to the first It may be delivered to the hot water generator 20.

Specifically, the heat source three-way valve 41 is a refrigerant flow open / close valve that controls the flow of the refrigerant to the first hot water generator 20. For example, when one side of the heat source three-way valve 41 is opened, the geothermal heat pump 10 Refrigerant from the) is directed directly to the underground heat exchanger (30) without passing through the first hot water generator 20, when the other side of the heat source three-way valve 41 is opened, some of the refrigerant from the geothermal heat pump (10) After passing through the first hot water generator 20 is directed to the underground heat exchanger (30).

In addition, the highly efficient geothermal heating and cooling system capable of producing hot water of the present invention may further include a second hot water generator 50 separately from the first hot water generator 20. The first hot water generator 20 may be provided at a branching point between the underground heat exchanger 30 and the geothermal heat pump 10, while the second hot water generator 50 may be provided to each of the demand sources 100 and 300. Branching may be provided at a branch point between the geothermal heat pump (10).

The second hot water generator 50 generates a portion of heat generated from the geothermal heat pump 10 and delivered to the first demand source 100 as a heat source, and is separated from the geothermal heat pump 10 to the second demand source 200. It is a device that can perform hot water supply operation.

That is, for example, if the first hot water generator 20 performs hot water supply operation by reusing heat transferred between the geothermal heat pump 10 and the underground heat exchanger 30, the second hot water generator 50 may be used. Is to perform a hot water supply operation by reusing the heat transferred between the geothermal heat pump 10 and each of the demand destinations 100 and 300.

The specific operation of the hot water supply operation of the first and second hot water generators 20 and 50 during the heating and cooling operation and the non-operation of the first demand destination will be described later.

On the other hand, the first hot water generator 20 and the second hot water generator 50 may be operated at the same time to perform the hot water supply supply operation to the second demand source 200, the first hot water generator 20 and the second hot water generator Only one of (50) may be operated. In addition, the first and second hot water generators 20, 50 may further be provided with a control device for adjusting the heat dissipation of the remaining waste heat to the geothermal side after the hot water is sufficiently produced.

In particular, since the summer cooling load of a typical building is about 1.5 times higher than the winter heating load, if the geothermal air conditioning system is installed in accordance with the cooling load, there is room for operation during heating load. Therefore, according to the high-efficiency geothermal heating and cooling system capable of producing hot water according to an embodiment of the present invention, when the hot water for hot water supply is efficiently produced by utilizing the waste heat of the cooling and heating system again, the overall equipment capacity of the geothermal heating and cooling system is produced for hot water production. There is no need to increase additionally.

That is, according to the present invention, for example, during the heating operation can produce hot water in the range of the heating capacity with a margin, for example, in particular during the cooling operation can exert the cooling load reduction effect through the production of hot water cooling efficiency It can also be improved at the same time. Specifically, by using the heat absorbed by the load side in the heat exchanger instead of heat dissipating to the underground heat exchanger during the cooling operation, the cooling operation and the production of hot water can be performed together to improve energy efficiency by about twice. have.

In addition, according to the high-efficiency geothermal heating and cooling system capable of producing hot water according to the present invention, for example, through the heat used for heating during the heating operation, and recovering heat radiated to the ground heat exchanger side during the cooling operation In this way, energy efficiency can be greatly improved.

Furthermore, in the case of the conventional water-to-air type geothermal heat pump, since the load side is a refrigerant circulation method, there is a problem that hot water cannot be produced. In the present invention, this point is improved to reuse waste heat in the water-to-air type heat pump. It is possible to produce hot water, so it is not necessary to add an electric boiler or fossil fuel boiler, which has relatively low energy efficiency, in the hot water production as a separate device.

Hereinafter, the control of the heat input to the first hot water generator 20 by the heat source three-way valve 41 in the high-efficiency geothermal heating and cooling system capable of producing hot water according to a preferred embodiment of the present invention configured as described above, and three-way hot water The control of the heat input to the second hot water generator 50 by the valve 42 will be described in more detail.

The heat source and the hot water three-way valves 41 and 42 may be configured to precisely control the amount of refrigerant flowing into the first and second hot water generators 20 and 50.

As described above, part of the waste heat transferred from the geothermal heat pump 10 toward the ground heat exchanger 30 is a heat source three-way valve 41 disposed in the pipe between the geothermal heat pump 10 and the ground heat exchanger 30. Branched from may be delivered to the first hot water generator (20).

At this time, when the first hot water generator 20 does not fully absorb the heat amount of the part of the waste heat, the heat source three-way valve 41 may be controlled to increase the amount of waste heat transferred to the underground heat exchanger 30. Can be. On the other hand, when the first hot water generator 20 does not completely absorb the heat of a part of the waste heat, it means that the waste heat is supplied beyond the limit of heat of waste heat that can be accommodated in the first hot water generator 20. .

In this way, by adjusting the orbit of the three-way valve 41, the utilization rate of the underground heat exchanger 30 and the first hot water generator 20 can be adjusted to satisfy the cooling load and to efficiently generate hot water.

In addition, the heat source three-way valve 41 may be configured to supply waste heat to the underground heat exchanger 30 to a separate waste heat storage device to temporarily store the waste heat. In addition, at least a part of the waste heat is not transferred to the ground heat exchanger 30 and is connected to a pipe through which a relatively hot refrigerant flows between the geothermal heat pump 10 and the first demand source 100, for example, a first demand source. You may comprise so that the operation efficiency at the time of indoor cooling and heating operation of 100 may be improved.

On the other hand, a portion of the waste hot water discharged from the second demand source 200 is branched from the hot water three-way valve 42 disposed in the pipe between the second hot water generator 50 and the second demand source 200, the second hot water generator ( 50).

In the second hot water generator 50, a pipe branched from the pipe from which the waste hot water is transferred from the second demand source 200 to the second hot water generator 50, and a relatively high temperature state during the heating and cooling operation from the first demand source 100. In the phosphorus pipe, the branch and the pipe may be adjacent to each other and configured to exchange heat. The second hot water generator 50 preferably performs a hot water supply operation to the second demand source 200, but may perform a cooling and heating supply operation.

On the other hand, the second hot water generator 50 may be connected in parallel on the pipe in which the refrigerant flows from the geothermal heat pump 10 to the first demand destination (100). Specifically, one pipe extending from the second hot water generator 50 is connected to a pipe in which a relatively warm refrigerant circulates between the geothermal heat pump 10 and the first demand source 100, and the geothermal heat pump 10 is connected to the pipe. The other pipe extending from the second hot water generator 50 may be connected to a pipe through which the relatively cool refrigerant circulates between the first demand source 100 and the first demand source 100. However, the configuration is not limited thereto and may be connected in series. In addition, the second hot water generator 50 may be configured as a separate heat pump having a heat exchanger, a compressor, an expansion valve, and the like.

That is, in one embodiment of the present invention by sending a portion of the waste hot water written in the second demand source 200 as hot water and circulated back to the first hot water generator 20 to the second hot water generator 50, the heat during the heating and cooling operation The heat of the relatively hot pipes circulated between the pump 10 and the first demand source 100 and heat exchange in the second hot water generator 50 may maximize the efficiency of hot water production. For example, heat may be provided from a high temperature circulating refrigerant capable of rapidly producing hot water, particularly in the heating operation at the first demand sources 100.

In summary, in one embodiment of the present invention, a part of the waste heat discharged between the geothermal heat pump 10 and the underground heat exchanger 30 is sent to the first hot water generator 20 through the heat source three-way valve 41. It is possible to supply the heat required for hot water production primarily, and also by sending a part of the waste heat of the hot water used and discharged from the second demand source 200 to the second hot water generator 50 side, the geothermal heat pump 10 and the first. From the high-temperature refrigerant circulating between the demand destination 100 can be supplied heat for secondary hot water production.

In addition, the geothermal heating and cooling system according to an embodiment of the present invention, the geothermal heat pump 10 and / so that the temperature of the hot water tank 60 for storing the hot water supplied to the second demand source 200 to maintain a predetermined temperature Or it may further include a system controller 70 for controlling the operating state of the second hot water generator (50).

The system controller 70 determines whether the temperature of the hot water tank 60 exceeds a predetermined temperature through a temperature sensor, and then, if the temperature of the hot water tank 60 exceeds a predetermined temperature, the geothermal heat pump 10 and / or The heat of hot water introduced into the hot water tank 60 may be lowered by controlling the heat exchange amount by controlling the operating state of the second hot water generator 50.

Furthermore, the system controller 70 may be controlled to operate the second hot water generator 50 as necessary even if the heating / cooling supply operation is not operated for the first demand destination 100. Accordingly, the hot water may be configured to be generated through the second hot water generator 50 separately from the heating / cooling supply operation to the first demand source 100.

Without being limited thereto, the system controller 70 may also be configured to control the operation of the first hot water generator 20 and the heat source and the hot water three-way valves 41 and 42. Accordingly, the system controller 70 may appropriately adjust the flow rate of the heat exchanger through the first hot water generator 20 and the flow rate of the refrigerant and the hot water through the heat source and the hot water three-way valves 41 and 42.

Accordingly, the system controller 70 may receive the operation information of the indoor unit controller for cooling and heating and the temperature state of the hot water tank to determine the operation mode and to control the geothermal heating and cooling system to most effectively produce the heating and cooling and hot water. That is, the algorithm may be configured to control the apparatus involved in each state during the cooling operation, the heating operation, and when the heating and cooling are not necessary, and to control the heating and cooling operation so that the temperature of the hot water tank is always maintained. .

Next, the operation mode of the highly efficient geothermal heating and cooling system capable of producing hot water according to an embodiment of the present invention will be described.

First, with reference to FIG. 4, the heating operation in the high-efficiency geothermal heating and cooling system capable of producing hot water as described above will be described by way of example.

When the geothermal heat pump 10 is operated in the heating operation mode, the heat absorbed by the underground heat exchanger 30 is heated up in the geothermal heat pump 10 through the refrigerant to supply heat to the first demand destination 100. At this time, as described above, the second hot water generator 50 may be installed in parallel with the pipe facing the first demand destination 100 to produce hot water.

Specifically, the refrigerant of the geothermal heat pump 10 passes from the heat source side heat exchanger 11 to the compressor 13, the demand-side heat exchanger 15, the expansion valve 12, and the heat source side heat exchanger 11. Circulating, the heat of the refrigerant is discharged from the demand-side heat exchanger (15), and is absorbed by the heat source-side heat exchanger (11). Therefore, the refrigerant circulating into the room absorbs heat from the demand-side heat exchanger 15 to heat the room. On the other hand, the refrigerant is endothermic in the heat source side heat exchanger (11), the refrigerant circulating in the underground heat exchanger (30) absorbs heat in the ground and transfers heat to the refrigerant in the heat source side heat exchanger (11).

At this time, with reference to Figure 4, it will be described in detail for the hot water production during the heating operation in the geothermal heating and cooling system.

In the underground heat exchanger (30), the refrigerant is heated up via the geothermal heat pump (10). A part of the heated refrigerant is branched between the geothermal heat pump 10 and the first demand destination 100 by a valve or the like and directed to the second hot water generator 50. The second hot water generator is branched between the hot water tank 60 and the first hot water generator 20 by the hot water three-way valve 42 and the like by the heated refrigerant and the hot water tank 60 on the side of the second demand source 200. The hot water to 50 is heat-exchanged to perform a hot water operation to raise the temperature of the waste hot water.

The hot water supplied as described above returns to the hot water tank 60 to supply hot water to the second demand destination. In addition, the remaining heat is transferred to the waste hot water and the remaining refrigerant discharges the remaining heat to the ground heat exchanger 30 via the geothermal heat pump 10 again. That is, in this case, the circulating refrigerant may not only perform indoor heating operation at the first demand source 100 but also perform hot water supply operation at the second demand destination through the second hot water generator 50 at the same time. In this way, since the refrigerant uses the heat from the underground heat exchanger 30 to the first demand destination 100 and the second demand destination 200 at the same time, the maximum heat can be used to significantly increase the overall efficiency of the geothermal air conditioning system. Can be raised.

At this time, a part of the refrigerant transferred from the geothermal heat pump 10 toward the geothermal heat exchanger 30 is disposed in the pipe between the geothermal heat pump 10 and the geothermal heat exchanger 30 even during the heating operation in the geothermal heating and cooling system. Since the waste heat is branched from the heat source three-way valve 41 and transferred to the first hot water generator 20, the first hot water generator 20 and the second hot water generator 50 operate simultaneously to supply hot water to the second demand source 200. Supply operation may be performed.

On the other hand, whether or not the second hot water generator 50 is operated according to the temperature of the hot water tank (60). That is, for example, the system controller 70 may control the second hot water generator 50 to operate when the temperature in the hot water tank 60 falls below a predetermined reference temperature.

At this time, the second hot water generator 50 generates hot water by heat generated while condensing the refrigerant gas of high temperature and high pressure in the geothermal heat pump 10. When the temperature of the hot water tank 60 reaches a predetermined temperature or more, the second hot water generator 50 is stopped. The system controller 70 may control the geothermal heat pump 10 and the second hot water generator 50 so that the temperature of the hot water tank 60 maintains a constant temperature. Even if the heating operation is not necessary, the system controller 70 may control this to operate the second hot water generator 50, in this case, it is possible to produce only hot water separately from the heating and heating operation.

Hereinafter, with reference to FIG. 5, the cooling operation in the high-efficiency geothermal heating and cooling system capable of producing hot water as described above will be described by way of example.

When the geothermal heat pump 10 is operated in the cooling operation mode, the heat absorbed by the first demand source 100 is cooled in the geothermal heat pump 10 through the refrigerant to release heat to the underground heat exchanger 30. At this time, as described above, the first hot water generator 20 may be installed in parallel with the pipe from the underground heat exchanger 30 toward the geothermal heat pump 10 to produce hot water.

Specifically, the refrigerant of the geothermal heat pump 10 passes from the heat source side heat exchanger 11 to the expansion valve 12, the demand destination heat exchanger 15, the compressor 13, and the heat source side heat exchanger 11. Circulating, the heat of the refrigerant is released from the heat source side heat exchanger (11), and is absorbed by the demand-side heat exchanger (15). Therefore, the refrigerant circulating into the room releases heat from the demand-side heat exchanger 15 to cool the room. On the other hand, the heat radiated from the heat source side heat exchanger 11 is transferred to the refrigerant circulating in the underground heat exchanger 30, and the heated refrigerant releases heat in the ground.

At this time, with reference to Figure 5, it will be described in detail with respect to the hot water production during the cooling operation in the geothermal heating and cooling system.

The refrigerant at the first demand destination 100 is reduced in temperature through the geothermal heat pump 10. A portion of the cooled refrigerant is branched between the geothermal heat pump 10 and the underground heat exchanger 30 by a valve or the like and directed to the first hot water generator 20. The heated refrigerant is heated with the waste hot water from the hot water tank 60 on the side of the second demand source 200 to increase the temperature of the waste hot water.

The hot water supplied as described above returns to the hot water tank 60 to supply hot water to the second demand source 200. In addition, the remaining heat is delivered to the waste hot water and the remaining refrigerant discharges the remaining heat to the underground heat exchanger (30). That is, in this case, the refrigerant circulated after the cooling operation in the first demand source 100 not only performs the indoor cooling operation in the first demand source 100 but also the second demand source 200 through the first hot water generator 20. Hot water supply operation at) can be performed at the same time. As such, the refrigerant reuses the waste heat from the first demand source 100 in the second demand source 200, so that the maximum heat can be used, thereby significantly increasing the overall efficiency of the geothermal heating and cooling system.

That is, instead of dissipating the heat absorbed by the geothermal heat pump 10 from the first demand source 100 to the underground heat exchanger 30 through the condenser of the geothermal heat pump 10, the first hot water generator 20 generates a high temperature. The geothermal circulating refrigerant of the second heat source circulating in the second demand source 200 to make hot water can be stored in the hot water tank (60).

At this time, a part of the refrigerant heated up through the geothermal heat pump 10 is branched between the geothermal heat pump 10 and the first demand destination 100 even when the cooling operation is performed in the geothermal heating and cooling system. By passing through), the first hot water generator 20 and the second hot water generator 50 may be operated at the same time to perform a hot water supply supply operation to the second demand destination (200).

On the other hand, in this process, when the temperature of the hot water tank 60 rises above a predetermined reference temperature, waste heat generated may be sent to the underground heat exchanger 30 to radiate heat. In addition, when the heat exchange capacity of the first hot water generator 20 does not completely absorb the heat radiation from the geothermal heat pump 10, an appropriate amount of geothermal water is supplied to the underground heat exchanger 30 through the heat source three-way valve 41. Can be sent to meet the cooling capacity.

That is, by adjusting the orbit of the three-way valve 41, the utilization rate of the underground heat exchanger 30 and the first hot water generator 20 can be adjusted to satisfy the cooling load and to produce hot water.

As such, when the hot water production and the cooling operation are performed at the same time, the overall efficiency of the geothermal heating and cooling system is increased to approximately twice. On the other hand, if the cooling operation load is small enough to not produce hot water during the cooling operation when the cooling is stopped may be controlled to produce hot water in the hot water alone generation operation mode.

Furthermore, with reference to FIG. 6, the case where the cooling and heating operation | movement is not performed in the high efficiency geothermal air-conditioning system which can produce hot water as mentioned above is demonstrated with an example.

At this time, the refrigerant is heated up through the geothermal heat pump 10 in the underground heat exchanger (30). All of the heated refrigerant is branched between the geothermal heat pump 10 and the first demand destination 100 by a valve or the like and directed to the second hot water generator 50. The second hot water generator is branched between the hot water tank 60 and the first hot water generator 20 by the hot water three-way valve 42 and the like by the heated refrigerant and the hot water tank 60 on the side of the second demand source 200. A hot water operation is performed in which the waste hot water directed to 50 exchanges heat to raise the temperature of the waste hot water.

The hot water supplied as described above returns to the hot water tank 60 to supply hot water to the second demand source 200. In addition, the remaining heat is transferred to the waste hot water and the remaining refrigerant discharges the remaining heat to the ground heat exchanger 30 via the geothermal heat pump 10 again. That is, in this case, the refrigerant may only perform a hot water supply operation at the second demand source 200 even if the indoor air conditioning operation is not performed.

On the other hand, when the temperature of the hot water tank 60 falls below the predetermined reference temperature in the state of not performing the cooling operation or the heating operation, the geothermal heat pump 10 is switched to the heating operation mode, and the second hot water The generator 50 is operated to produce hot water. The operation method in this case is similar to the operation process at the time of heating operation, and only the indoor unit for cooling and heating of the first demand destination 100 is not operated. At this time, in the geothermal heating and cooling system, the heat from the geothermal heat exchanger (30) is absorbed by the geothermal heat pump (10) to make hot water, and in the system controller (70), the geothermal heat pump (10) and the second hot water generator (50). Will be controlled accordingly.

Accordingly, the high-efficiency geothermal heating and cooling system capable of producing hot water of the present invention can produce hot water at the same time as heating in one line with a heater of a water-to-air type without installing a separate boiler or the like during heating operation. By recycling the waste heat of the condenser that was thrown into the ground, it is possible to produce hot water at the same time as cooling with one line of air-to-air air conditioner. In addition, it is also possible to produce only hot water even if the indoor cooling and heating operation is not performed.

Through this, during the heating operation, hot water can be rapidly produced without a separate device by using a high temperature refrigerant supplied, and during the cooling operation, energy efficiency can be greatly improved by recovering waste heat radiated to the geothermal side. In addition, there is no need for a separate hot water production apparatus such as a boiler, there is an advantage that can be miniaturized geothermal heating and cooling system.

Furthermore, since hot water is produced in one line with the air-to-air air conditioner, the ground heat may be efficiently absorbed, and hot water supply and auxiliary heating may be controlled to be completely independent from the main heating.

On the other hand, the high-efficiency geothermal heating and cooling system capable of producing hot water according to an embodiment of the present invention is separated from the geothermal heat pump 10 by using a part of heat transferred between the underground heat exchanger 30 and the geothermal heat pump 10 as a heat source. The furnace may include an auxiliary heat pump 80 capable of performing a cooling and heating supply operation to the third demand destination 300.

Piping between the geothermal heat exchanger 30 and the geothermal heat pump 10 may be branched into a pipe extending to the auxiliary heat pump 80 through the three-way valve, through which the heat from the geothermal heat exchanger 30 The auxiliary heat pump 80 may be delivered to the side. In the auxiliary heat pump 80, the heating and cooling supply operation is performed to the third demand source 300 using the heat as a heat source. The third demand source 300 may selectively operate any one of low temperature air conditioning and low temperature hot water supply, and the auxiliary heat pump 80 may be operated separately from the air conditioner at the first demand destination 100.

Specific configuration of the auxiliary heat pump 80 may be applied as it is in the geothermal heat pump 10, it may be disposed in parallel with the geothermal heat pump (10).

Here, a part of the heat generated from the auxiliary heat pump 80 and delivered to the third demand destination 300 is used as a heat source, and a hot water supply supply operation is performed to the second demand destination 200 separately from the geothermal heat pump 10. It may further include an auxiliary hot water generator 90 that can be performed.

At this time, a part of the waste hot water discharged from the second demand source 200 is branched from the hot water three-way valve 42 disposed in the pipe between the auxiliary hot water generator 90 and the second demand source 200 to the auxiliary hot water generator 90. Can be delivered.

The above-described configuration of the geothermal heat pump 10 and the second hot water generator 50 may be applied to the specific configuration of the auxiliary heat pump 80 and the auxiliary hot water generator 90, but the difference is the auxiliary heat pump 80. In the point that the heat or waste heat circulated between the ground heat exchanger 30 and the geothermal heat pump 10 as a heat source to perform the cooling and heating of the third demand source (300).

That is, in the high-efficiency geothermal heating and cooling method capable of producing hot water according to an embodiment of the present invention, the geothermal heat pump 10 uses the heat delivered from the underground heat exchanger 30 to supply heating and cooling to the first demand destination 100. Performing driving (S10); Part of the waste heat generated by the air-conditioning supply operation of the geothermal heat pump 10 and transferred from the geothermal heat pump 10 toward the underground heat exchanger 30 as a heat source, and the geothermal heat pump in the first hot water generator 20 Separately from 10), performing a hot water supply operation for the second demand source 200 (S20); And a part of heat generated from the geothermal heat pump 10 and delivered to the first demand destination 100 as a heat source, and the second hot water generator 50 separates the geothermal heat pump 10 from the second demand destination 200. It may include a step (S30) for performing a hot water supply operation.

In addition, here, a part of the heat generated by the auxiliary heat pump 80 and delivered to the third demand destination 300 is used as a heat source, and the auxiliary hot water generator 90 performs a hot water supply supply operation to the second demand destination 200. It may further comprise a step (S40).

On the other hand, the high-efficiency geothermal heating and cooling method capable of producing hot water according to an embodiment of the present invention, the temperature of the hot water tank 60 for storing the hot water supplied by the system controller 70 to the second demand destination 200 is predetermined The method may further include controlling an operation state of the geothermal heat pump 10 and / or the second hot water generator 50 to maintain the temperature (S51). In addition, the system controller 70 may further include a step (S52) of controlling the second hot water generator 50 to operate as needed even if the heating / cooling supply operation is not operated for the first demand destination 100.

Further, in the step S20 of performing a hot water supply operation in the first hot water generator 20, when the first hot water generator 20 does not completely absorb a part of waste heat, the heat source three-way valve 41 may be Controlling to increase the amount of waste heat delivered to the ground heat exchanger 30 may be further included (S21).

In the high-efficiency geothermal heating and cooling system capable of producing hot water according to one embodiment of the present invention according to the embodiments described above, the hot water is diversified through the first hot water generator 20, the second hot water generator 50, and the auxiliary hot water generator 90. It is possible to supply the heat source required for production, wherein hot water is circulated simultaneously by using heat circulating between the geothermal heat exchanger 30 and the geothermal heat pump 10, and between the geothermal heat pump 10 and the first consumer 100. In addition to being able to produce hot hot water quickly, the overall efficiency of high-efficiency geothermal heating and cooling systems can be greatly improved.

In addition, without the need for a separate hot water production apparatus, by integrating to produce hot water from the water-to-air indoor air-conditioning system, it is possible to effectively accommodate geothermal heat as well as miniaturization of the system.

As mentioned above, although preferred embodiments of the present invention have been described with reference to the accompanying drawings, the present invention is not limited thereto, and those skilled in the art to which the present invention pertains may have the technical idea of the present invention. Substitutions and / or modifications can be made without departing from the scope of the invention. Therefore, the scope of the present invention should not be limited to the above-described embodiments, but should be defined by the claims below and equivalents thereof.

10: geothermal heat pump 20: first hot water generator
30: underground heat exchanger 41: heat source three-way valve
42: hot water three-way valve 50: second hot water generator
60: hot water tank 70: system controller
80: auxiliary heat pump 90: auxiliary hot water generator
100: first demand source 200: second demand source
300: third party

Claims (11)

delete delete delete A geothermal heat pump 10 capable of performing a cooling / heating supply operation to the first demand destination 100 using the heat delivered from the underground heat exchanger 30;
Part of the waste heat generated by the cooling and heating supply operation of the geothermal heat pump 10 and transferred from the geothermal heat pump 10 toward the underground heat exchanger 30 as a heat source, separate from the geothermal heat pump 10 A first hot water generator 20 capable of performing a hot water supply supply operation to the second demand source 200; And
A hot water supply operation is performed separately from the geothermal heat pump 10 using a part of heat generated by the geothermal heat pump 10 and delivered to the first demand destination 100 as a heat source. It includes a second hot water generator 50 that can perform,
The first hot water generator 20 and the second hot water generator 50 are operated at the same time to perform a hot water supply supply operation to the second demand source 200,
A portion of the waste hot water discharged from the second demand source 200 is branched from the hot water three-way valve 42 disposed in the pipe between the second hot water generator 50 and the second demand source 200 and the second hot water. Part of the waste hot water delivered to the generator 50, the second hot water generator 50 is a high-temperature refrigerant circulated between the geothermal heat pump 10 and the first demand source 100 during the heating and cooling operation; Heat exchange in the second hot water generator 50
High efficiency geothermal heating and cooling system capable of producing hot water.
The method of claim 4, wherein
Part of the heat transferred between the geothermal heat exchanger 30 and the geothermal heat pump 10 as a heat source, and performs a heating and heating supply operation to the third demand source 300 separately from the geothermal heat pump 10. Auxiliary heat pump 80; And
An auxiliary hot water generator 90 capable of performing a hot water supply supply operation to the second demand destination 200 using a portion of heat generated by the auxiliary heat pump 80 and delivered to the third demand destination 300 as a heat source. Containing more
High efficiency geothermal heating and cooling system capable of producing hot water.
The method of claim 5,
A part of the waste hot water discharged from the second demand source 200 is branched from the hot water three-way valve 42 disposed in the pipe between the auxiliary hot water generator 90 and the second demand source 200 and the auxiliary hot water generator ( Delivered with
High efficiency geothermal heating and cooling system capable of producing hot water.
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