KR100648300B1 - Heat pump type air conditioning unit - Google Patents

Abstract

The present invention relates to a heat pump type air conditioner for operating a heat pump so that hot water can be formed even when the heat pump is not operated because there is no heating and cooling load. The heat pump type air conditioner includes a compressor, a first heat exchanger, an expansion valve, A circulation system including a second heat exchanger and a third heat exchanger to circulate the refrigerant; An underground water circulation pipe having a first pump installed therein for circulating the ground water for exchanging heat with the refrigerant in the first heat exchanger; A first heat exchange water circulation pipe provided with a second pump for circulating the first heat exchange water for exchanging heat with the refrigerant in the second heat exchanger to perform cooling and heating of the room; And a second heat exchange water circulation pipe provided with a third pump and a fourth pump for circulating the second heat exchange water for generating hot water by exchanging heat with the refrigerant in the third heat exchanger. It is to provide a heat pump type heating and cooling device capable of forming hot water by operating.

Description

Heat pump type cooling and heating unit {Heat pump type Cooling and heating Apparatus}

1 is a schematic structural diagram of a conventional heat pump type air conditioner.

Figure 2a is a view showing the operation in the cooling mode of the heat pump type air conditioner according to the present invention.

Figure 2b is a view showing the operation in the heating mode of the heat pump type air conditioner according to the present invention.

* Description of the symbols for the main parts of the drawings *

100: circulation system 110: first heat exchanger

120: second heat exchanger 130: third heat exchanger

140: first refrigerant movement line 141: first check valve

142: second check valve 150: second refrigerant movement line

151: expansion valve 152: filter

153: receiver tank 160: 3rd refrigerant movement line

165: 4-way valve 170: fourth refrigerant movement line

171: oil separator 175: compressor

200: groundwater circulation pipe 300: the first heat exchange water circulation pipe

400: second heat exchange water circulation pipe P1: first pump

P2: 2nd pump P3: 3rd pump

P4: 4th pump

The present invention relates to a heat pump type heating and cooling device, and more particularly, to a heat pump type heating and cooling device capable of forming hot water by operating a heat pump even without a heating and cooling load.

In general, a conventional heat pump refers to a cooling and heating device that transfers a low temperature heat source to a high temperature or a high temperature heat source to a low temperature by using evaporation heat or condensation heat of a refrigerant. Such heat pumps are widely used for heating and cooling indoors.

1 is a schematic structural diagram for explaining a conventional heat pump type air conditioner.

As shown in FIG. 1, the conventional heat pump type air conditioner includes two heat exchangers 10 and 20, a compressor 40, a four-way valve 50 and a pump 11 and 21, respectively, for driving. It is made of a structure having an expansion valve (60).

More specifically, the conventional heat pump type air conditioner is indoors through the operation of the first heat exchanger 10 and the second drive pump 21 which exchange heat with the outside through the operation of the first drive pump 11. And a second heat exchanger 20 for exchanging heat, and a compressor 40 for circulating a refrigerant for heat exchange.

The conventional heat pump type heating and cooling device is driven only when the first driving pump 11, the second driving pump 21, and the compressor 40 are operated. The driving method is as follows based on the cooling mode.

First, the compressor 40 operates to make the low temperature low pressure refrigerant to high temperature and high pressure, and then the heat is exchanged with the outside in the first heat exchanger 10 by the operation of the first driving pump 11 to release the heat. Will condense. That is, the first heat exchanger 10 serves as a condenser for dissipating heat to the outside.

The refrigerant that has released heat from the first heat exchanger 10 expands to low temperature and low pressure in the expansion valve 60 by the operation of the compressor 40 and then moves to the second heat exchanger 20.

When the second driving pump 21 of the second heat exchanger 20 is operated, the refrigerant absorbs heat from the room to cool the room. That is, the second heat exchanger 20 serves as an evaporator that absorbs heat in the room.

The hot water supply and cooling heat pumps are provided with a third heat exchanger 30 and a third driving pump 31 in the existing heat pump. The heat exchanger must be located between the compressor and the four sides, so that the refrigerant at high temperature and high pressure can always flow regardless of the heating and cooling mode.

By the operation of the compressor 40, the high temperature and high pressure refrigerant moves to the third heat exchanger 30.

When the third drive pump 31 operates in the third heat exchanger 30, the refrigerant releases heat absorbed by the second heat exchanger 20 to form hot water, and the third drive pump operates. If not, it moves to the first heat exchanger, and the heat is released to the ground by the operation of the first drive pump. That is, the first heat exchanger 10 and the third heat exchanger act as a condenser, and the second heat exchanger acts as an evaporator.

On the other hand, the conventional heat pump type air-conditioning apparatus as described above has a problem that hot water is not formed when the heat pump does not operate because there is no cooling load, that is, when the second heat exchanger 20 does not operate. In more detail, the second heat exchanger 20 is an evaporator that absorbs heat in the room, and the first heat exchanger 10 and the third heat exchanger 30 are both condensers that emit heat to the outside. If the heat exchanger does not work, the heat pump cannot operate. Therefore, since there is no heat absorbed, the conventional heat pump type air conditioner has a problem that hot water cannot be formed when there is no cooling load.

An object of the present invention, which was devised to solve the above-mentioned problems, is to provide a heat pump type heating and cooling device capable of forming hot water when the heat pump does not operate because there is no cooling load.

In addition, an object of the present invention is to provide a heat pump type heating and cooling device capable of forming hot water at a higher temperature by installing an additional pump in a heat exchanger forming hot water.

The heat pump type air-conditioning apparatus of the present invention for achieving the above object comprises a circulation system for circulating a refrigerant having a compressor, a first heat exchanger, an expansion valve, a second heat exchanger, and a third heat exchanger; An underground water circulation pipe having a first pump installed therein for circulating the ground water for exchanging heat with the refrigerant in the first heat exchanger; A first heat exchange water circulation pipe provided with a second pump for circulating the first heat exchange water for exchanging heat with the refrigerant in the second heat exchanger to perform cooling and heating of the room; And a second heat exchange water circulation pipe provided with a third pump and a fourth pump for circulating the second heat exchange water for generating hot water by exchanging heat with the refrigerant in the third heat exchanger. Achieved by providing a device.

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

Figure 2a is a view showing the operation in the cooling mode of the heat pump type heating and cooling device according to the present invention, Figure 2b is a view showing the operation in the heating mode of the heat pump type heating and cooling device according to the present invention.

As shown, the circulation system 100 according to the present invention is the first refrigerant movement line 140 and the second refrigerant movement line connecting between the first heat exchanger 110 and the second heat exchanger 120. 150, a check valve 141 in different directions, respectively, provided in any one of the first refrigerant movement line 140 and the second refrigerant movement line 150, the first refrigerant movement line 140, and An expansion valve 151, a filter 152, and a receiver tank 153 for adjusting the amount of the refrigerant, and the second heat exchanger 120 and the third heat exchanger installed in the other one of the second refrigerant movement lines 150. A third refrigerant movement line 160 connecting the 130, a fourth refrigerant movement line 170 connecting the third heat exchanger 130 and the first heat exchanger 110, and the third refrigerant movement A four-way valve 165 installed at a point where the line 160 and the fourth refrigerant movement line 170 intersect and change the circulation direction of the refrigerant; The oil separator 171 and the compressor 175 installed in the fourth refrigerant movement line 170 may be included.

The four-way valve 165 operates in opposite directions in the heating mode and the cooling mode, respectively, and when the hot water is formed without the cooling load in the cooling mode, the four-way valve 165 is switched in the same direction as the heating mode. The first pump P1 and the third pump P3 may operate to form hot water.

The third pump P3 and the fourth pump P4 are preferably installed in parallel to the second heat exchange water circulation pipe 400, and the capacity of the fourth pump P4 is the third pump P3. ) 1/8 or less of the capacity.

That is, when the heat pump operates because the cooling pump has a cooling load, if the hot water temperature is lower than or equal to the set point, the third pump P3 operates to make hot water to the set point, and above the set temperature, the fourth pump P4 operates to generate hot water. Make it over the set temperature.

Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings. However, the present invention is not limited to the embodiments described herein but may be embodied in other forms. Like numbers refer to like elements throughout.

2A and 2B, a heat pump type air conditioner according to an embodiment of the present invention includes a compressor 175, a first heat exchanger 110, an expansion valve 151, a second heat exchanger 120, And a circulation system (100) having a third heat exchanger (130) to circulate the refrigerant; An underground water circulation pipe (200) provided with a first pump (P1) for circulating groundwater for exchanging heat with a refrigerant in the first heat exchanger (110); A first heat exchange water circulation pipe (300) provided with a second pump (P2) for circulating the first heat exchange water for exchanging heat with the refrigerant in the second heat exchanger (120) for cooling and heating the room; The second heat exchange water circulation pipe 400 in which the third pump P3 and the fourth pump P4 are installed to circulate the second heat exchange water for generating hot water by exchanging heat with the refrigerant in the third heat exchanger 130. ).

At this time, the third pump (P3) and the fourth pump (P4) is preferably installed in parallel to the second heat exchange water circulation pipe 400, the capacity of the fourth pump (P4) is the third pump. (P3) About 1/8 or less of capacity.

The structure of the heat pump type air-conditioning apparatus of this invention is demonstrated more concretely as follows.

The circulation system 100 for circulating the refrigerant includes a compressor 175, a first heat exchanger 110, an expansion valve 151, a second heat exchanger 120, and a third heat exchanger 130. The first heat exchanger 110, the second heat exchanger 120, and the third heat exchanger 130 may be connected to the first, second, third, and fourth refrigerant moving lines 140, 150, 160, and 170. Allow the refrigerant to circulate.

That is, the first heat exchanger 110 and the second heat exchanger 120 are connected through the first refrigerant movement line 140 and the second refrigerant movement line 150, and the second heat exchanger 120 and The third heat exchanger 130 is connected through the third refrigerant movement line 160. In addition, the third heat exchanger 130 and the first heat exchanger 110 are connected through a fourth refrigerant movement line 170.

At this time, any one of the first refrigerant movement line 140 and the second refrigerant movement line 150 connecting the first heat exchanger 110 and the second heat exchanger 120, for example, the first refrigerant movement The lines 140 are provided with first and second check valves 141 and 142 in different directions, respectively, to determine the flow direction of the refrigerant in the heating or cooling mode of the heat pump type air conditioner of the present invention. That is, only one of the first and second check valves 141 and 142 operates in a heating or cooling mode.

In addition, another one of the first refrigerant movement line 140 and the second refrigerant movement line 150 connecting the first heat exchanger 110 and the second heat exchanger 120, for example, the second refrigerant movement Line 150 is provided with an expansion valve 151, a filter 152 and a receiver tank 153 for buffering the flow of the refrigerant.

The four-way valve 165 is installed in the middle of the third refrigerant movement line 160 connecting the second heat exchanger 120 and the third heat exchanger 130. The four-way valve determines the heating and cooling mode.

An oil separator 171 and a compressor 175 are installed in the fourth refrigerant movement line 170 connecting the third heat exchanger 130 and the first heat exchanger 110, and in the middle of the fourth refrigerant movement line. 170 is connected to the four-way valve 165 and intersects with the third refrigerant movement line 160.

In addition, the groundwater circulation pipe 200 circulates the groundwater by the operation of the first pump P1 so that the groundwater flows into the first heat exchanger 110. The groundwater introduced into the first heat exchanger 110 exchanges heat with the refrigerant to allow the second heat exchanger 120 and the third heat exchanger 130 to generate indoor cooling and hot water.

The first heat exchange water circulation pipe 300 circulates the heat exchange water for cooling and heating the room by the operation of the second pump P2 so that the heat exchange water flows into the second heat exchanger 120. The heat exchange water introduced into the second heat exchanger 120 exchanges heat with the refrigerant to perform room cooling and heating.

The second heat exchange water circulation pipe 400 circulates the heat exchange water for generating hot water by the operation of the third pump P3 and the fourth pump P4 to flow into the third heat exchanger 130. . The heat exchange water introduced into the third heat exchanger 130 absorbs heat from the refrigerant and is converted into hot water.

The heat pump type air conditioner as described above operates as follows.

First, the operation will be described based on the cooling mode.

The heat pump type air-conditioning unit is condensed by the operation of the third pump (P3) or the fourth pump (P4) in the third heat exchanger (130) when the compressor 175 operates to make the low-temperature low-pressure refrigerant at high temperature and high pressure , The third pump (P3) or the fourth pump (P4) does not operate and does not condense, and moves to the first heat exchanger (110). When the first pump P1 operates, groundwater is introduced into the first heat exchanger 110 through the groundwater circulation pipe 200, and the introduced groundwater and the refrigerant exchange heat with each other. That is, the refrigerant releases heat, and the groundwater absorbs heat. At this time, the refrigerant that has released heat is condensed. That is, the first heat exchanger 110 serves as a condenser in which the refrigerant releases heat.

The refrigerant condensed by dissipating heat moves to the second heat exchanger 120 through the first refrigerant movement line 140 and the second refrigerant movement line 150 due to the operation of the compressor 175. At this time, only one of the first check valve 141 of the two first and second check valves (141, 142) is operated to match the flow of the refrigerant to the cooling mode.

The refrigerant moved to the second heat exchanger 120 exchanges heat with heat exchange water for indoor cooling and heating, which is circulated by the operation of the second pump P2. That is, the refrigerant absorbs heat and the heat exchange water releases heat. Therefore, the second heat exchanger 120 serves as an evaporator in which the refrigerant absorbs heat. In addition, the heat exchange water releases heat, thereby cooling the room.

The refrigerant absorbed by the second heat exchanger 120 is moved to the third heat exchanger 130 via the compressor via the four-way valve 165 and the fourth refrigerant movement line 170.

In the third heat exchanger 130, the refrigerant exchanges heat with heat exchange water circulated by the operation of the third pump P3 or the fourth pump P4 to generate hot water.

At this time, when the temperature of the hot water is lower than the set temperature, for example, 50 ° C or less, the third pump P3 operates to generate hot water, and when the temperature of the hot water is higher than the set temperature, for example, 50 ° C or more. The fourth pump (P4) is operated to raise the temperature of the hot water above the set temperature. That is, the temperature of the hot water may be raised to 60 ° C. to 80 ° C. through the operation of the fourth pump P4.

In addition, in the third heat exchanger 130, the refrigerant releases heat and the water absorbs heat to generate hot water. Thus, the third heat exchanger 130 serves as a condenser in which the refrigerant releases heat.

The refrigerant that has released heat from the third heat exchanger 130 moves back to the first heat exchanger 110 through the third refrigerant movement line 160 and the four-way valve 165.

On the other hand, the heat pump type heating and cooling device of the present invention operates in the heating mode, in contrast to the cooling mode, but will be described in more detail below.

The heat pump type air conditioner is moved to the third heat exchanger 130 by the operation of the compressor 175, and releases heat to generate hot water.

At this time, when the temperature of the hot water is lower than the set temperature, for example, 50 ° C or less, the third pump P3 operates to generate hot water, and when the temperature of the hot water is higher than the set temperature, for example, 50 ° C or more. The third pump P3 is turned off and the fourth pump P4 is operated to raise the temperature of the hot water above the set temperature.

The condensed refrigerant moves to the second heat exchanger through the four-way valve 165. When the second pump P2 is operated, circulating water in the room flows into the second heat exchanger 120, and the refrigerant circulates in the room. Condenses by releasing heat from the water. That is, the second heat exchanger 110 may release heat from the refrigerant, and the heat exchange water may release heat to increase the indoor temperature.

The refrigerant that has released heat from the second heat exchanger 120 moves to the first heat exchanger 110 through the first refrigerant movement line 140 and the second refrigerant movement line 150. At this time, only the second check valve 142 which is not operated in the cooling mode among the first and second check valves 141 and 142 installed in the first refrigerant movement line 140 is operated so that the flow of the refrigerant is appropriate for the heating mode. do.

On the other hand, the heat pump type heating and cooling device according to an embodiment of the present invention can generate hot water by operating the heat pump when the heat pump does not operate because there is no heating and cooling load.

In the heat pump type air conditioner according to the present invention, when the temperature of the hot water is lower than the set temperature in the heating mode, the compressor 175, the first pump P1, and the third pump P3 are in an ON state, and the second pump P2 is turned on. ) And the fourth pump P4 are turned off, the refrigerant absorbs heat from the first heat exchanger 110, and releases the absorbed heat from the third heat exchanger 130 to generate hot water.

In the heat pump type air conditioner according to the present invention, when the temperature of the hot water is lower than the set temperature in the cooling mode, the compressor 175, the first pump P1, and the third pump P3 are in an ON state, and the second pump is turned on. P2 and the fourth pump P4 are in an OFF state, and the direction of the four-way valve 165 is switched like the heating mode. That is, since the second pump P2 is turned off, indoor cooling is maintained and hot water is generated. When the hot water is generated and the temperature of the hot water becomes higher than the set temperature, the compressor 175, the first pump P1, and the third pump P3 are turned off, and the four-way valve 165 is also switched in direction. . That is, the four-way valve 165 is changed in direction, so that the heat pump type air conditioner of the present invention operates in the same manner as in the heating mode. Of course, at this time, in the state in which the operation of the second heat exchanger 120 is stopped, the first heat exchanger 110 and the third heat exchanger 130, which are the remaining heat exchangers, operate in the same manner as in the heating mode.

While the foregoing has been described with reference to preferred embodiments of the present invention, those skilled in the art will be able to variously modify and change the present invention without departing from the spirit and scope of the invention as set forth in the claims below. It will be appreciated.

As described above, the heat pump type air-conditioning apparatus of the present invention may provide a heat pump type air-conditioning apparatus capable of forming hot water by operating a heat pump when the heat pump is not operated because there is no air-conditioning load.

In addition, by installing two pumps in the heat exchanger is formed hot water is a very useful invention because it has the effect of providing a heat pump type heating and cooling device that can raise the hot water above the set temperature.

Claims (6)

A circulation system (100) having a compressor (175), a first heat exchanger (110), an expansion valve (151), a second heat exchanger (120), and a third heat exchanger (130) to circulate the refrigerant; An underground water circulation pipe (200) provided with a first pump (P1) for circulating groundwater for exchanging heat with a refrigerant in the first heat exchanger (110); A first heat exchange water circulation pipe (300) provided with a second pump (P2) for circulating the first heat exchange water for exchanging heat with the refrigerant in the second heat exchanger (120) for cooling and heating the room; The second heat exchange water circulation pipe 400 in which the third pump P3 and the fourth pump P4 are installed to circulate the second heat exchange water for generating hot water by exchanging heat with the refrigerant in the third heat exchanger 130. Heat pump type heating and cooling device characterized in that it comprises a). The method of claim 1, The circulation system 100 A first refrigerant movement line 140 and a second refrigerant movement line 150 connecting between the first heat exchanger 110 and the second heat exchanger 120, First and second check valves 141 and 142 provided in any one of the first refrigerant movement line 140 and the second refrigerant movement line 150, respectively; A receiver tank 153 for adjusting an amount of an expansion valve 151, a filter 152, and a refrigerant installed in the other of the first refrigerant movement line 140 and the second refrigerant movement line 150; A third refrigerant movement line 160 connecting the second heat exchanger 120 and the third heat exchanger 130, A fourth refrigerant movement line 170 connecting the third heat exchanger 130 and the first heat exchanger 110, A four-way valve 165 installed at a point where the third refrigerant movement line 160 and the fourth refrigerant movement line 170 intersect and change a circulation direction of the refrigerant; Heat pump type heating and heating device comprising an oil separator (171) and a compressor (175) installed in the fourth refrigerant movement line (170). The method of claim 2, The four-way valve 165 is configured to operate in opposite directions in the heating mode and the cooling mode, respectively, to form hot water when there is no cooling load in the cooling mode, and the four-way valve 165 is in the same direction as the heating mode. And a first pump (P1), any one of the third pump (P3) and the fourth pump (P4) to operate to form hot water. The method of claim 1, The third pump (P3) and the fourth pump (P4) is a heat pump type heating and heating device, characterized in that installed in parallel to the second heat exchange water circulation pipe (400). The method of claim 1, The capacity of the fourth pump (P4) is different from the capacity of the third pump (P3) heat pump type heating and cooling device. The method of claim 1, When the temperature of the hot water is less than the set temperature, the third pump (P3) is operated, if the temperature of the hot water is above the set temperature, the fourth pump (P4) is operated to generate hot water, characterized in that the heat pump type heating and heating device .

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