KR101286699B1 - heating and cooling system and using a heat pump - Google Patents

Abstract

The present invention relates to a heating and cooling device using a heat pump, comprising a first and second heat exchanger, the first and second heat exchanger connecting the first and second heat exchanger to form a closed circuit, the refrigerant flows inside the first and second refrigerant circulation pipe, and An expansion valve installed in the first refrigerant circulation pipe to control the flow of the refrigerant, a heat pump unit provided with a compressor and a four-way valve installed in the second refrigerant circulation pipe, and a second refrigerant circulation pipe installed in the second refrigerant circulation pipe to provide the first refrigerant from the compressor. And a hot water supply unit which heats the water by heat-exchanging the coolant flowing in the heat exchanger or the second heat exchanger with water.
The heating and cooling device using the heat pump according to the present invention has the advantage of reducing the heat energy lost to the outside air by heating the fluid to be heated using the heat of the high-temperature refrigerant flowing from the compressor to the condenser.

Description

Heating and cooling system {heating and cooling system and using a heat pump}

The present invention relates to a cooling and heating device using a heat pump, and more particularly, to a cooling and heating device using a heat pump for heating a fluid to be heated using a high temperature refrigerant flowing from a compressor to a condenser.

 Heat pumps are used to cool and heat the room. The heat pump includes a compressor, a condenser for condensing the high temperature and high pressure gas refrigerant compressed by the compressor into a medium temperature high pressure liquid refrigerant, an expansion valve for expanding the medium temperature high pressure liquid refrigerant condensed by the condenser into a low temperature low pressure liquid refrigerant, And an evaporator for evaporating the low temperature low pressure liquid refrigerant passing through the expansion valve to the low temperature low pressure gas refrigerant to supply to the compressor.

That is, the low pressure gaseous refrigerant is compressed in a compressor and then transferred to the condenser in a high pressure gaseous phase, where it is condensed into a liquid phase by releasing heat. The condensed refrigerant is expanded under reduced pressure through an expansion valve and is supplied to the evaporator. The refrigerant absorbs heat from the outside in the evaporator, evaporates, and then returns to the compressor.

Korean Patent No. 2001-0060533 discloses a refrigeration cycle. The refrigeration cycle includes a compressor for compressing the refrigerant, a condenser for condensing the compressed refrigerant, an evaporator for evaporating the refrigerant, an expander for decompressing and expanding a refrigerant flowing from the condenser toward the evaporator, a refrigerant exiting the expander and an evaporator It consists of an internal heat exchanger for exchanging refrigerant with each other. The internal heat exchanger is made of a casing in the form of a sealed container, and the casing is provided with a thermally conductive coil conduit through which refrigerant from the condenser passes, and the casing is provided with an inlet and an outlet through which the refrigerant from the evaporator flows in and out.

However, the refrigeration cycle according to the prior art as described above has a problem that the heat loss occurs when the high temperature refrigerant flowing from the compressor to the condenser through the circulation pipe heat exchange with the outside.

The present invention has been made to solve the above problems, and provides a heating and cooling device using a heat pump for heating the fluid to be heated by using heat energy lost to the outside of the high-temperature refrigerant flowing from the compressor to the condenser. There is a purpose.

Heating and cooling device using a heat pump according to the present invention for achieving the above object is a first and second heat exchanger, the first and second heat exchanger connecting the first and second heat exchanger to form a closed circuit, the refrigerant flows inside the first and second A heat pump unit provided with a refrigerant circulation pipe, an expansion valve installed in the first refrigerant circulation pipe to control the flow of the refrigerant, a compressor and a four-way valve installed in the second refrigerant circulation pipe, and the second refrigerant circulation And a hot water supply unit installed in the pipe to heat the water with the refrigerant having a high temperature flowing from the compressor to the first heat exchanger or the second heat exchanger.

The second refrigerant circulation tube includes a first tube member interconnecting the first heat exchanger and the compressor, and a second tube member interconnecting the second heat exchanger and the compressor, and the hot water supply unit includes the first tube. A first valve branched to a member and communicating with the first heat exchanger, and a first valve installed at a connection portion between the first branch pipe and the first pipe member to selectively connect the compressor and the first branch pipe A second branch pipe branched to the second pipe member to communicate with the second heat exchanger, and connected to the second branch pipe and the first pipe member to connect the compressor and the second branch pipe. It is preferable to include a second valve member for selectively connecting, a third heat exchanger for mutually heat-exchanging the high temperature refrigerant flowing through the first branch pipe or the second branch pipe, and the water supplied through the water pipe. Do.

The hot water supply unit controls the first valve member to allow the refrigerant discharged from the compressor to flow into the first branch pipe when the first heat exchanger discharges heat to the outside, thereby controlling the compressor and the first branch pipe. The second valve member to be connected to each other to prevent the refrigerant discharged from the second heat exchanger from flowing into the second branch pipe, and when the first heat exchanger absorbs heat from the outside, The second valve member is controlled to interconnect the compressor and the second branch pipe so that the refrigerant discharged flows into the second branch pipe, and the refrigerant discharged from the first heat exchanger is connected to the first branch pipe. It further includes a control unit for controlling the first valve member to block the flow into the branch pipe.

On the other hand, the air-conditioning device using a heat pump according to another embodiment of the present invention, the heat storage tank is provided with an internal space for accommodating the heat exchange medium, the heat exchange medium is accommodated, the first heat exchanger or the second heat exchange And a first heat exchange chamber configured to exchange heat with the heat exchange medium, and a first supply pipe and a first return pipe configured to connect the first heat exchange chamber and the heat storage tank to circulate the heat exchange medium in the heat storage tank.

In addition, the air-conditioning apparatus using a heat pump according to another embodiment of the present invention further comprises a geothermal heat supply unit for supplying underground geothermal heat to the first heat exchanger or the second heat exchanger, the geothermal heat supply unit is a heat exchange medium is accommodated And a second heat exchange chamber installed with the first heat exchanger or the second heat exchanger to exchange heat with the heat exchange medium, a ground heat exchanger extending from the ground to the ground to exchange heat between the geothermal heat and the heat exchange medium, and the geothermal heat exchanger. And a second supply pipe and a second return pipe connecting the second heat exchange chamber, and a circulation pump installed in the second supply pipe to pump the heat exchange medium.

The heating and cooling device using the heat pump according to the present invention has the advantage of reducing the heat energy lost to the outside air by heating the fluid to be heated by using the heat of the high-temperature refrigerant flowing from the compressor to the condenser.

1 is a circuit diagram of a heating and cooling device using a heat pump according to an embodiment of the present invention,
2 is a circuit diagram of a heating and cooling device using a heat pump according to another embodiment of the present invention,
3 is a circuit diagram of a heating and cooling device using a heat pump according to another embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings will be described in more detail the air-conditioning device using a heat pump according to the present invention.

1 shows a cooling and heating device 10 using a heat pump according to the present invention.

Referring to the drawings, the heating and cooling device 10 using the heat pump is installed in the heating and cooling object such as a facility house and the heat pump unit 20 for cooling and cooling, and the refrigerant discharged from the compressor 25 of the heat pump unit 20 and It is provided with a hot water supply unit 30 for heating the water by mutual heat exchange of the water.

The heat pump unit 20 connects the first heat exchanger 21 installed on the heating and cooling target, the second heat exchanger 22 installed on the outside of the heating and cooling target, and the first and second heat exchangers 21 and 22. And expansion valves 26 installed in the first and second refrigerant circulation pipes 23 and 24 and the first refrigerant circulation pipe 23 through which the refrigerant flows, thereby controlling the flow of the refrigerant. The compressor 25 and the four-way valve 27 provided in the 2 refrigerant circulation pipe 24 are provided.

At a position adjacent to the second heat exchanger 22 installed outside of the heating and cooling target, a circulation fan may be installed so that the refrigerant passing through the second heat exchanger 22 can easily exchange heat with air outside the heating and cooling target. Do.

At this time, the second refrigerant circulation tube 24 mutually connects the first heat exchanger 21 and the compressor 25 with the first pipe member 28 and the second heat exchanger 22 and the compressor 25. A second pipe member 29 for connecting is provided.

The hot water supply unit 30 branches to the first pipe member 28 and communicates with the first heat exchanger 21, the first branch pipe 31, and the first branch pipe 31 and the first pipe member 28. Is connected to the first valve member 32 and the second pipe member 29 to selectively connect the compressor 25 and the first branch pipe 31 to the second heat exchanger 22. The second branch pipe 33 and the second branch pipe 33 and the first pipe member 28 are connected to the connecting portion of the compressor 25 and the second branch pipe 33 to selectively connect A third heat exchanger for heat-exchanging the two-valve member 34, the high-temperature refrigerant flowing through the first branch pipe 31 or the second branch pipe 33, and water flowing through the water pipe 36 ( 35).

The first branch pipe 31 extends to penetrate the third heat exchanger 35, and one end thereof communicates with the first pipe member 28 at a position adjacent to the compressor 25, and the other end thereof has a first heat exchange. It communicates with the 1st pipe member 28 of the position adjacent to the machine 21. The portion installed inside the third heat exchanger 35 of the first branch pipe 31 is formed in a wave shape or a spiral along the longitudinal direction so as to expand the thermal contact area with the water introduced into the third heat exchanger 35. It is desirable to be.

The first valve member 32 is installed at both ends of the first branch pipe 31 and the connecting portion of the first pipe member 28, respectively, and optionally the first branch pipe (according to the heating or cooling operation for the heating and cooling target) It is preferable to use a three-way valve so that the refrigerant can flow in 31).

The second branch pipe 33 extends to penetrate the inside of the third heat exchanger 35, and one end thereof communicates with the second pipe member 29 at a position adjacent to the compressor 25, and the other end of the second heat exchanger 35. It communicates with the 2nd pipe member 29 of the position adjacent to the machine 22. The portion installed in the third heat exchanger 35 of the second branch pipe 33 is formed in a wave shape or a spiral along the longitudinal direction so as to expand the thermal contact area with the water introduced into the third heat exchanger 35. It is desirable to be.

The second valve member 34 is installed at both ends of the second branch pipe 33 and the connection portion of the second pipe member 29, respectively, and optionally the second branch pipe (according to the heating or cooling operation for the heating / heating object). It is preferable to use a three-way valve to allow the refrigerant to flow in 33).

The third heat exchanger 35 is provided with an inner space so that water can be accommodated therein, and the first branch pipe 31 and the second branch pipe 33 are installed to penetrate through the third heat exchanger 35. The third heat exchanger 35 has an inlet formed in communication with the water pipe 36 on one side so that water can flow into the inside, and heat exchanges with the first branch pipe 31 and the second branch pipe 33 on the other side. The outlet is formed so that the heated water can be discharged to the outside. Water introduced into the third heat exchanger 35 is heated by heat exchange with a refrigerant flowing in the first branch pipe 31 or the second branch pipe 33.

Meanwhile, the hot water supply unit 30 further includes a control unit for selectively operating the first valve member 32 and the second valve member 34 according to the operation of the first and second heat exchangers 21 and 22.

The control unit controls the first valve member 32 to allow the refrigerant discharged from the compressor 25 to flow into the first branch pipe 31 when the first heat exchanger 21 discharges heat to the cooling / heating target area. By connecting the compressor 25 and the first branch pipe 31 to each other, the second valve member 34 to block the refrigerant discharged from the second heat exchanger 22 to enter the second branch pipe (33) To control.

In addition, the controller may include the second valve member 34 so that the refrigerant discharged from the compressor 25 may flow into the second branch pipe 33 so that the first heat exchanger 21 may absorb heat from the heating and cooling target area. By controlling the control unit to interconnect the compressor 25 and the second branch pipe 33, the first valve member to block the refrigerant discharged from the first heat exchanger 21 flows into the first branch pipe (31) Control 32.

The control unit controls the refrigerant to selectively flow into the first branch pipe 31 or the second branch pipe 33 according to the operation of the first heat exchanger 21, so that a high temperature refrigerant always flows into the third heat exchanger 35. Supplied.

Referring to the operation of the cooling and heating device 10 using the heat pump according to the present invention configured as described above in detail as follows.

When the first heat exchanger 21 emits heat to heat the heating / heating target area, the second heat exchanger 22 absorbs heat from the outside and evaporates the refrigerant having a low temperature and low pressure gas state to form the second pipe member 29. Through the compressor 25. The low temperature low pressure refrigerant is compressed by the compressor 25 to a high temperature and high pressure state, and the high temperature high pressure refrigerant flows into the first heat exchanger 21 through the first pipe member 28.

At this time, the control unit communicates the compressor 25 and the first branch pipe 31 through the first valve member 32 to introduce a high-temperature refrigerant into the first branch pipe 31. The high temperature refrigerant flowing through the first branch pipe 31 passes through the third heat exchanger 35 to exchange heat with water to heat the water. In this case, the controller controls the second valve member 34 to prevent the low-temperature refrigerant discharged from the second heat exchanger 22 from flowing into the third heat exchanger 35 through the second branch pipe 33. Control to block the inflow of the refrigerant to the second branch pipe (33).

On the other hand, the high temperature and high pressure refrigerant gas introduced into the first heat exchanger 21 releases heat to the inside of the heating and cooling target while exchanging heat with the internal air of the heating and cooling target. Here, the refrigerant is liquefied into a liquid state at low temperature and high pressure. The refrigerant in a liquid state of low temperature and high pressure is passed through the expansion valve 26 through the first refrigerant circulation pipe 23 by the first heat exchanger 21, and the refrigerant is decompressed by the expansion valve 26 to reduce the temperature of the low pressure state. Becomes Refrigerant which is in a low pressure state by the expansion valve 26 flows into the second heat exchanger 22 through the first refrigerant circulation pipe 23, and the refrigerant introduced into the second heat exchanger 22 receives external heat. Absorbed into a gaseous state of low temperature and low pressure flows into the compressor (25).

On the other hand, when the first heat exchanger 21 absorbs heat to cool the heating / heating target area, the second heat exchanger 22 releases heat to the outside so that the refrigerant in the liquid state of low temperature and high pressure is the first refrigerant circulation pipe ( 23 through the expansion valve 26, the refrigerant is decompressed by the expansion valve 26 to a low temperature low pressure state. Refrigerant, which is in a low pressure state by the expansion valve, flows into the first heat exchanger 21 through the first refrigerant circulation pipe 23, and the refrigerant introduced into the first heat exchanger 21 absorbs heat in an air conditioning target area. It becomes a low temperature low pressure gas state and flows into the compressor 25.

The low temperature low pressure refrigerant is compressed by the compressor 25 to a high temperature and high pressure state, and the high temperature high pressure refrigerant flows into the second heat exchanger 22 through the second pipe member 29.

At this time, the control unit communicates the compressor 25 and the second branch pipe 33 through the second valve member 34 to introduce a high temperature refrigerant into the second branch pipe 33. The high temperature refrigerant flowing through the second branch pipe 33 passes through the third heat exchanger 35 to exchange heat with water to heat the water. At this time, the controller controls the second valve member 34 to prevent the low-temperature refrigerant discharged from the first heat exchanger 21 from being introduced into the third heat exchanger 35 through the first branch pipe 31. Control to block the flow of refrigerant to the first buccal tube.

Meanwhile, the high temperature and high pressure refrigerant introduced into the second heat exchanger 22 discharges heat to the outside to become a liquid at low temperature and high pressure, and the refrigerant opens the expansion valve 26 through the first refrigerant circulation pipe 23. To pass.

As mentioned above, the air conditioning and heating device 10 using the heat pump according to the present invention heats a heating target fluid by using heat of a high temperature refrigerant flowing from the compressor 25 to the condenser so that the heat energy lost to the outside air is lost. There is an advantage to reduce.

On the other hand, Figure 2 shows a heating and cooling device 100 using a heat pump according to another embodiment of the present invention.

Elements having the same functions as those in the previous drawings are denoted by the same reference numerals.

Referring to the drawings, the heating and cooling device 100 using the heat pump is a heat storage tank 111 is provided with an internal space to accommodate the heat exchange medium therein, the heat exchange medium is accommodated, the first heat exchanger 21 is A first supply pipe 113 installed to circulate the heat exchange medium in the heat storage tank 111 by connecting the first heat exchange chamber 112 and the first heat exchange chamber 112 and the heat storage tank 111 to exchange heat with the heat exchange medium. And a first return tube 114.

The heat storage tank 111 is provided with a heat insulating material on the inner side or the outer side so as to prevent the heat of the heat exchange medium accommodated therein to be discharged to the outside. The heat exchange medium heated or cooled by heat exchange with the refrigerant through the first heat exchanger 21 flows into the heat storage tank 111 and is stored. At this time, the heated or cooled water may be stored in the heat storage tank 111 using water as a heat exchange medium. The user may use water heated or cooled by the heat pump unit 20 through a drain pipe formed in the heat storage tank 111.

Preferably, the first supply pipe 113 is provided with a supply pump 115 to pump the heat exchange medium in the first heat exchange chamber 112 to supply the heat storage tank 111.

Although not shown in the drawings, when the heat exchange medium is heated through the first heat exchanger 21, a connection pipe is installed between the heat storage tank 111 and the third heat exchanger 35 to connect the heat exchange medium through the third heat exchanger 35. The heated water may be supplied to the heat storage tank 111 to store hot water.

On the other hand, although not shown in the drawing, unlike the present embodiment, the first heat exchange chamber 112 may not be installed in the first heat exchanger 21 but may be installed in the second heat exchanger 22. In addition, the heat storage tank 111 may be connected to a plurality of auxiliary heat exchangers installed in the facility house to supply a high temperature heat exchange medium to the auxiliary heat exchanger to heat the facility house.

On the other hand, Figure 3 shows a cooling and heating device 200 using a heat pump according to another embodiment of the present invention.

Referring to the drawings, the air-conditioning apparatus 200 using the heat pump is further provided with a geothermal heat supply unit 210 for supplying geothermal heat to the second heat exchanger (22).

The geothermal heat supply unit 210 accommodates a heat exchange medium, the second heat exchange chamber 211 is provided with a second heat exchanger 22 to exchange heat with the heat exchange medium, and extends from the ground to the ground to exchange heat between the geothermal heat and the heat exchange medium. Geothermal heat exchanger 212, the second supply pipe 213 and the second return pipe 214 connecting the geothermal heat exchanger 212 and the second heat exchange chamber 211 and the second supply pipe 213 is installed in the heat exchange And a circulation pump 215 for pumping the medium.

The heat exchange medium heated by heat exchange with geothermal heat through the geothermal heat exchanger 212 is supplied to the second heat exchange chamber 211 through the second supply pipe 213. The high temperature heat exchange medium introduced into the second heat exchange chamber 211 exchanges heat with the second heat exchanger 22. As mentioned above, the second heat exchanger 22 absorbs a large amount of heat energy by exchanging heat with a high temperature heat exchange medium heated by geothermal heat, thereby improving the heating efficiency of the first heat exchanger 21.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is evident that many alternatives, modifications and variations will be apparent to those skilled in the art.

Accordingly, the true scope of protection of the present invention should be determined only by the appended claims.

10: air conditioner using heat pump
20: heat pump unit
21: first heat exchanger
22: second heat exchanger
23: first refrigerant circulation pipe
24: second refrigerant circulation pipe
25: compressor
26: expansion valve
27: four-way valve
30: hot water supply unit
31: first branch
32: first valve member
33: second branch
34: second valve member
35: third heat exchanger

Claims (5)

The first and second heat exchangers and the first and second heat exchangers are connected to form a closed circuit, and the first and second refrigerant circulation pipes through which refrigerant flows, and the first refrigerant circulation pipes installed in the first refrigerant circulation pipe, flow of the refrigerant. An expansion valve for controlling the heat pump unit, and a heat pump unit having a compressor and a four-way valve installed in the second refrigerant circulation pipe;
And a hot water supply unit installed in the second refrigerant circulation pipe to heat the water by exchanging water with the high temperature refrigerant flowing from the compressor to the first heat exchanger or the second heat exchanger.
The second refrigerant circulation pipe and the first pipe member for interconnecting the first heat exchanger and the compressor,
A second tube member interconnecting the second heat exchanger and the compressor;
The hot water supply unit
A first branch pipe branched to the first pipe member and in communication with the first heat exchanger;
A first valve member installed at a connection portion of the first branch pipe and the first pipe member to selectively connect the compressor and the first branch pipe;
A second branch pipe branched to the second pipe member to communicate with the second heat exchanger;
A second valve member installed at a connection portion of the second branch pipe and the second pipe member to selectively connect the compressor and the second branch pipe;
And a third heat exchanger configured to mutually heat-exchange the refrigerant having a high temperature flowing through the first branch pipe or the second branch pipe and the water supplied through the water pipe.
delete The method of claim 1,
The hot water supply unit
When the first heat exchanger discharges heat to the outside, the compressor and the first branch pipe are interconnected by controlling the first valve member to allow the refrigerant discharged from the compressor to flow into the first branch pipe. And controlling the second valve member to block the refrigerant discharged from the second heat exchanger from flowing into the second branch pipe, and discharged from the compressor when the first heat exchanger absorbs heat from the outside. The second valve member is controlled to connect the compressor and the second branch pipe to allow the refrigerant to flow into the second branch pipe, and the refrigerant discharged from the first heat exchanger is transferred to the first branch pipe. And a control unit for controlling the first valve member to block the inflow.
The method of claim 1,
A heat storage tank provided with an inner space for accommodating a heat exchange medium therein;
A first heat exchange chamber in which the heat exchange medium is accommodated and the first heat exchanger or the second heat exchanger is installed to exchange heat with the heat exchange medium;
And a first supply pipe and a first return pipe for connecting the first heat exchange chamber and the heat storage tank to circulate the heat exchange medium in the heat storage tank.
The method of claim 1,
And a ground heat supply unit for supplying underground ground heat to the first heat exchanger or the second heat exchanger.
The geothermal heat supply unit
A second heat exchange chamber accommodating a heat exchange medium, the first heat exchanger or a second heat exchanger installed to exchange heat with the heat exchange medium;
A geothermal heat exchanger extending from the ground to the ground for heat exchange between the geothermal heat and the heat exchange medium,
A second supply pipe and a second return pipe connecting the geothermal heat exchanger and the second heat exchange chamber;
And a circulating pump installed in the second supply pipe to pump the heat exchange medium.

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