KR101236375B1 - Heat pump system using geothermal heat - Google Patents

Abstract

The present invention, the compressor 110 for compressing the refrigerant flowing into the inlet and discharged to the outlet; A receiver 120 in which the liquefied refrigerant is stored; A first load side heat exchanger (210) provided with a first-first refrigerant flow path to exchange heat with the load side; A second heat exchange part 220 in which a 2-1 refrigerant flow path is provided; A third heat exchange part 230 provided with a 3-1 refrigerant flow path; A fourth heat exchanger 240 provided to exchange heat of the 4-1 refrigerant flow passage and the 4-2 refrigerant flow passage; A first refrigerant pipe 310 having one end connected to the first end of the 1-1 refrigerant flow path of the first load side heat exchanger 210; A first open / close valve 311 provided in the first refrigerant pipe 310; One end is connected to the first end of the 2-1 first refrigerant flow path of the second heat exchange part 220 and the other end is connected to the second end of the 1-1 refrigerant flow path of the first load side heat exchange part 210. A second refrigerant pipe 320 connected; A second open / close valve 321 provided in the second refrigerant pipe 320; A third refrigerant pipe 330 having one end connected to the first end of the 3-1 refrigerant flow path of the third heat exchanger 230; A third open / close valve 331 provided in the third refrigerant pipe 330; One end is connected to the second end of the 3-1 refrigerant flow passage of the third heat exchange unit 230 and the other end is connected to the first end of the 4-1 refrigerant flow passage of the fourth heat exchanger 240. A fourth refrigerant pipe 340; A fourth open / close valve 341 provided in the fourth refrigerant pipe 340; A fifth refrigerant pipe (350) connecting the second end of the fourth first refrigerant flow path of the fourth heat exchanger (240) and the inlet of the receiver (120) to each other; A sixth refrigerant pipe connecting the second end of the second-1 refrigerant flow path of the second heat exchange part 220 and the first end of the 4-1 refrigerant flow path of the fourth heat exchanger 240 to each other; 360); A sixth opening and closing valve 361 provided in the sixth refrigerant pipe 360; A seventh refrigerant pipe 370 connecting the second end of the first-first refrigerant flow path of the first load side heat exchanger 210 and the outlet of the receiver 120 to each other; A seventh open / close valve 371 provided on the seventh refrigerant pipe 370; A first expansion valve 372 provided on the seventh refrigerant pipe 370; An eighth refrigerant pipe 380 connecting the second end of the third-1 refrigerant flow path of the third heat exchanger 230 and the outlet of the receiver 120 to each other; An eighth opening / closing valve 381 provided in the eighth refrigerant pipe 380; A second expansion valve 382 provided in the eighth refrigerant pipe 380; A ninth refrigerant pipe connecting the first end of the third-1 refrigerant flow path of the third heat exchanger 230 and the second end of the fourth-2 refrigerant flow path of the fourth heat exchanger 240 to each other; 390); A ninth open / close valve 391 provided in the ninth refrigerant pipe 390; A tenth refrigerant pipe connecting the first end of the first-first refrigerant flow path of the first load side heat exchanger 210 and the second end of the fourth-2 refrigerant flow path of the fourth heat exchanger 240 to each other; 400; A tenth open / close valve 401 provided on the tenth refrigerant pipe 400; An eleventh refrigerant pipe connecting the first end of the second-first refrigerant flow path of the second heat exchange part 220 and the first end of the fourth-second refrigerant flow path of the fourth heat exchanger 240 to each other; 410); An eleventh open / close valve 411 provided on the eleventh refrigerant pipe 410; A twelfth refrigerant pipe 420 connecting the other end of the third refrigerant pipe 330 and the first end of the fourth-2 refrigerant flow path of the fourth heat exchanger 240 to each other; A twelfth open / close valve 421 provided on the twelfth refrigerant pipe 420; A thirteenth refrigerant pipe 430 connecting the other end of the first refrigerant pipe 310 and the second end of the second-first refrigerant flow path of the second heat exchange part 220 to each other; A thirteenth open / close valve 431 provided on the thirteenth refrigerant pipe 430; In the cooling mode, the outlet of the compressor 110 and the other end of the three refrigerant pipes 330 are connected to each other, and the other end of the first refrigerant pipe 310 and the inlet of the compressor 110 In the heating mode, the outlet of the compressor 110 and the other end of the first refrigerant pipe 310 are connected to each other, and the inlet of the compressor 110 and the other end of the third refrigerant pipe 330 to each other. Four-way valve 180 to connect; And a control unit.

Description

Geothermal heat pump system {HEAT PUMP SYSTEM USING GEOTHERMAL HEAT}

The present invention relates to a heat pump system, and more particularly to a heat pump system using a geothermal and ventilation heat source.

Most commonly used energy sources are fossil fuels such as coal, petroleum, natural gas, or nuclear fuels. However, fossil fuels pollute the environment due to various pollutants generated during the combustion process, and nuclear fuels generate harmful substances such as water pollution and radioactivity, and these energy sources have a limited amount of reserves.

Therefore, in recent years, the development of alternative energy to replace this has been actively progressed. Among these alternative energy, researches on natural energy such as wind, solar, geothermal, etc. have been conducted for a long time and practically installed and used air-conditioning and heating system. These natural energies have almost no influence on environmental pollution and climate change. While there is an advantage in obtaining energy, the fact that the energy density is so low that it is a key to the development of natural energy technology to increase the density and convert it into a usable form.

One of such natural energy technologies is known as a heat pump system that performs cooling and heating using geothermal heat as a heat source. Heat pump system using geothermal heat is a technology that uses heat exchanger to install heat exchanger to recover heat in the ground of 10 ~ 20 ℃ or discharge heat into the ground.

In general, as a heat source of a heat pump, an air heat source method of obtaining or discharging heat in the air, such as an air conditioner, and a water heat source method of discharging heat through a cooling tower are used. The use of geothermal sources has the advantage that the energy efficiency is very high compared to air heat sources.

In particular, the year-round air temperature in the areas where the four seasons are obviously changed greatly varies from -20 to 40 ℃, while the underground temperature is almost constant at 10-20 ℃ during the year below 5m underground.

Therefore, in the case of cooling in summer, the air heat source temperature is consumed a lot of power to discharge the cooling heat to 30 ℃ or more, while the geothermal heat source is smoothly discharged to 10 ~ 20 ℃ shows a high efficiency. On the contrary, in the case of heating in winter, the air heat source is difficult to supply the heat necessary for heating at the lowest temperature of -20 ° C, while the underground heat source is 10 to 20 ° C, which can stably supply the heating heat to the heat pump.

The geothermal heat pump system is known to have the highest energy efficiency among all air-conditioning technologies. Therefore, it is an essential technology in a situation where energy resources are scarce and energy costs are high.

The conventional heat pump system using a geothermal source is configured to exchange heat between the geothermal source and the refrigerant, not the queue, in order to cool or heat the indoor side heat exchanger.

1 is a system configuration diagram of a heat pump air conditioner using geothermal heat according to the prior art. The conventional geothermal heat source heat pump air-conditioning apparatus shown in FIG. 1 includes a compressor 21 for compressing a refrigerant gas of low temperature and low pressure and converting it into a high temperature and high pressure, and configured to cool or heat an interior of a room by a refrigerant. Installed between the indoor heat exchanger 23 and the outdoor heat exchanger 25 installed on the outside and configured to exchange heat of the refrigerant with heat obtained in the ground, and between the indoor heat exchanger 23 and the outdoor heat exchanger 25. And an expansion valve 24 for throttling the condensed refrigerant at low pressure, a four-way valve 22 for changing a circulation path of the refrigerant, and a control unit 10 for controlling each component to perform cooling operation or heating operation. It is configured to include.

At this time, the outdoor heat exchanger (25) is connected to the underground heat exchange tube (40) buried in the ground to form a circulation path of the water refrigerant, it can be heat exchanged with the refrigerant by the water refrigerant circulated by the circulation pump 41 It is. That is, the water refrigerant heat-exchanged with the refrigerant by the outdoor heat exchanger (25) is transferred to the underground heat exchange tube (40), heat exchanged by the heat of the ground, and then transferred to the outdoor heat exchanger (25). Recently, the underground heat exchanger tube 40 may be configured to exchange heat from seawater or a lake, and may be configured to directly circulate groundwater.

First, referring to the circulation path of the refrigerant during the cooling operation, the four-way valve 22 is controlled by the path shown by the broken line in FIG. 1 to transfer the refrigerant gas compressed by the compressor 21 to the outdoor heat exchanger 25. Let's do it. The compressed refrigerant gas is condensed by heat exchange with geothermal heat in the outdoor heat exchanger (25), and expands (condenses) the condensed refrigerant into the expansion valve (24) and converts the refrigerant into a low temperature refrigerant. Transfer. Then, the indoor heat exchanger 23 is to cool the room in the evaporation process by evaporating the low-temperature refrigerant, in this case is converted into medium-temperature refrigerant gas by the heat of the room obtained in the cooling process through the four-way valve Is transferred to (21).

Next, since the four-way valve 22 is controlled by the path shown by the solid line in FIG. 1 at the time of heating operation, and is made in the reverse order to the circulation path at the time of cooling operation, the refrigerant 21 , The indoor heat exchanger (23), the expansion valve (24) and the outdoor heat exchanger (25) in the order of circulation. At this time, the indoor heat exchanger 23 serves as a condenser to heat the room with heat during the condensation process, and the outdoor heat exchanger 25 serves as an evaporator to absorb heat from geothermal heat during the evaporation process.

In addition, looking at the prior art of Figure 1, it can be seen that the high-temperature, high-pressure refrigerant gas compressed by the compressor 21 is configured to be transferred to the four-way valve 22 via the heating heat exchanger (30). That is, the heating heat exchanger 30 is stored in the heat storage tank used for heating or water supply and accumulates heat in the heat storage tank as heat obtained from the refrigerant gas of high temperature and high pressure.

The heat pump air-conditioning apparatus using geothermal heat according to the prior art configured as described above heats the refrigerant in the outdoor heat exchanger 25 as geothermal heat instead of the queue, so that the power required to operate the heat pump system is used rather than using the queue. Savings can be achieved, as well as heating and cooling can be achieved in one heat pump system.

In the above, the outdoor heat exchanger 25 and the underground heat exchanger tube 40 may be collectively referred to as an underground heat exchanger, and the indoor heat exchanger 23 may be referred to as a load side heat exchanger.

Thus, the heat pump apparatus generally includes an underground heat exchanger and a load side heat exchanger.

In the conventional technology as described above, the underground heat exchanger tube 40 is generally buried in the ground, and the underground heat exchanger tube of the buried method is somewhat lacking in the amount of latent heat which can quickly cope with the heat source on the load side during heat exchange with the ground. The heat flux in the ground depends on the properties of the soil, which causes various problems. In other words, in order to exhaust the required load on the load side to geothermal heat, it is necessary to bury a lot of underground heat exchanger pipes, which requires a lot of construction costs, and it is difficult to secure a lot of necessary sites. The main cause.

The present invention has been made to solve the problems of the prior art as described above, it is to propose a heat pump system of a new structure for increasing the efficiency of the heat pump system.

In order to solve the above problems, the present invention, the compressor (110) for compressing the refrigerant flowing into the inlet and discharged to the outlet; A receiver 120 in which the liquefied refrigerant is stored; A first load side heat exchanger (210) provided with a first-first refrigerant flow path to exchange heat with the load side; A second heat exchange part 220 in which a 2-1 refrigerant flow path is provided; A third heat exchange part 230 provided with a 3-1 refrigerant flow path; A fourth heat exchanger 240 provided to exchange heat of the 4-1 refrigerant flow passage and the 4-2 refrigerant flow passage; A first refrigerant pipe 310 having one end connected to the first end of the 1-1 refrigerant flow path of the first load side heat exchanger 210; A first open / close valve 311 provided in the first refrigerant pipe 310; One end is connected to the first end of the 2-1 first refrigerant flow path of the second heat exchange part 220 and the other end is connected to the second end of the 1-1 refrigerant flow path of the first load side heat exchange part 210. A second refrigerant pipe 320 connected; A second open / close valve 321 provided in the second refrigerant pipe 320; A third refrigerant pipe 330 having one end connected to the first end of the 3-1 refrigerant flow path of the third heat exchanger 230; A third open / close valve 331 provided in the third refrigerant pipe 330; One end is connected to the second end of the 3-1 refrigerant flow passage of the third heat exchange unit 230 and the other end is connected to the first end of the 4-1 refrigerant flow passage of the fourth heat exchanger 240. A fourth refrigerant pipe 340; A fourth open / close valve 341 provided in the fourth refrigerant pipe 340; A fifth refrigerant pipe (350) connecting the second end of the fourth first refrigerant flow path of the fourth heat exchanger (240) and the inlet of the receiver (120) to each other; A sixth refrigerant pipe connecting the second end of the second-1 refrigerant flow path of the second heat exchange part 220 and the first end of the 4-1 refrigerant flow path of the fourth heat exchanger 240 to each other; 360); A sixth opening and closing valve 361 provided in the sixth refrigerant pipe 360; A seventh refrigerant pipe 370 connecting the second end of the first-first refrigerant flow path of the first load side heat exchanger 210 and the outlet of the receiver 120 to each other; A seventh open / close valve 371 provided on the seventh refrigerant pipe 370; A first expansion valve 372 provided on the seventh refrigerant pipe 370; An eighth refrigerant pipe 380 connecting the second end of the third-1 refrigerant flow path of the third heat exchanger 230 and the outlet of the receiver 120 to each other; An eighth opening / closing valve 381 provided in the eighth refrigerant pipe 380; A second expansion valve 382 provided in the eighth refrigerant pipe 380; A ninth refrigerant pipe connecting the first end of the third-1 refrigerant flow path of the third heat exchanger 230 and the second end of the fourth-2 refrigerant flow path of the fourth heat exchanger 240 to each other; 390); A ninth open / close valve 391 provided in the ninth refrigerant pipe 390; A tenth refrigerant pipe connecting the first end of the first-first refrigerant flow path of the first load side heat exchanger 210 and the second end of the fourth-2 refrigerant flow path of the fourth heat exchanger 240 to each other; 400; A tenth open / close valve 401 provided on the tenth refrigerant pipe 400; An eleventh refrigerant pipe connecting the first end of the second-first refrigerant flow path of the second heat exchange part 220 and the first end of the fourth-second refrigerant flow path of the fourth heat exchanger 240 to each other; 410); An eleventh open / close valve 411 provided on the eleventh refrigerant pipe 410; A twelfth refrigerant pipe 420 connecting the other end of the third refrigerant pipe 330 and the first end of the fourth-2 refrigerant flow path of the fourth heat exchanger 240 to each other; A twelfth open / close valve 421 provided on the twelfth refrigerant pipe 420; A thirteenth refrigerant pipe 430 connecting the other end of the first refrigerant pipe 310 and the second end of the second-first refrigerant flow path of the second heat exchange part 220 to each other; A thirteenth open / close valve 431 provided on the thirteenth refrigerant pipe 430; In the cooling mode, the outlet of the compressor 110 and the other end of the three refrigerant pipes 330 are connected to each other, and the other end of the first refrigerant pipe 310 and the inlet of the compressor 110 In the heating mode, the outlet of the compressor 110 and the other end of the first refrigerant pipe 310 are connected to each other, and the inlet of the compressor 110 and the other end of the third refrigerant pipe 330 to each other. Four-way valve 180 to connect; And a control unit.

In the above, the first load side heat exchanger 210 is preferably made to heat exchange with the water stored in the heat storage tank (130).

In the above, each of the second heat exchanger 220 and the third heat exchanger 230 is preferably made to heat exchange with water stored in the water tank 140 having a constant temperature by geothermal heat.

In the above, the second heat exchange unit 220 is provided with a 2-2 heat medium flow path to heat exchange with the 2-1 refrigerant flow path, the third heat exchange unit 230, the 3-1 refrigerant. A 3-2 thermal medium flow path is provided to exchange heat with the flow path, and the brine tank 151 in which brine is stored, the water tank heat exchanger 152 for exchanging heat with water stored in the water tank 140, and the brine tank 151. The brine stored in the brine circulation pipe which is provided to return to the brine tank 151 after flowing to the tank heat exchange unit 152 after passing through the 2-2 heat medium flow path and the 3-2 heat medium flow path ( 153 and the brine circulation pump 154 provided in the brine circulation pipe 153 to pressurize the brine is preferably further added.

In the above, the underground heat exchanger 141 is provided perpendicular to the ground so that the water stored in the water tank 140 can absorb the heat of the ground, the water stored in the water tank 140 is the ground heat exchanger 141 An underground circulation pipe 142 provided to circulate the underground circulation pump 143 provided in the underground circulation pipe 142 may be further added.

In the above, the first load side heat exchanger 210 is made to heat exchange with the water stored in the heat storage tank 130, each of the second heat exchanger 220 and the third heat exchanger 230 is constant temperature by geothermal It is made to exchange heat with the water stored in the water tank 140 having a castle, the heat of the heat storage tank 130 heat exchange with the outdoor air introduced into the room along the outdoor passage of the heat exchange ventilator, the water of the water tank 140 It may be to heat exchange with the indoor air discharged to the outside along the indoor passage of the heat exchange ventilator.

The present invention as described above can not only increase the efficiency of the heat pump system, but also provide a more environmentally friendly heat pump system by using geothermal and ventilation heat sources.

1 is a system configuration diagram of a heat pump system using geothermal heat according to the prior art,
2 is a schematic diagram of a heat pump system to which an embodiment of the present invention is applied;
3 is a summer operation of an embodiment according to the present invention,
Figure 4 is a winter operation of one embodiment according to the present invention,
5 is a schematic view of the ventilation device of one embodiment according to the present invention;

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In order to clearly illustrate the present invention in the drawings, portions not related to the description are omitted, and like reference numerals are given to similar portions throughout the specification.

Throughout the specification, when a part is said to "include" a certain component, it means that it can further include other components, without excluding other components unless specifically stated otherwise.

Figure 2 is a schematic diagram of a heat pump system to which an embodiment of the present invention is applied, Figure 3 is a summer operation of one embodiment according to the present invention, Figure 4 is a winter operation of an embodiment according to the present invention, Figure 5 Is a schematic diagram of a ventilation apparatus of one embodiment according to the present invention.

The main configuration of the present embodiment will be described first with reference to Fig. 2, and then its operation will be described with reference to Figs.

First, the main devices of the present embodiment will be described.

The compressor 110 compresses the refrigerant in a gaseous state, compresses the refrigerant introduced into the inlet 112, and discharges the refrigerant to the outlet 111.

The receiver 120 stores the liquefied refrigerant.

The first load side heat exchanger 210 is provided on the load side. Typically, the indoor heat exchanger may be a load side heat exchanger. In the present embodiment, the first load side heat exchanger 210 is provided in the form of a plate heat exchanger, and the first load side heat exchanger 210 is provided with a 1-1 refrigerant flow path 211 through which refrigerant flows. A 1-2 thermal medium flow path 212 that exchanges heat with the first-first refrigerant flow path 211 is provided.

The 1-2 heat medium flow path 212 is connected to the heat storage tank 130 and the water supply pump 131 in which water is stored, and the water stored in the heat storage tank 130 is stored in the 1-2 heat medium by the water supply pump 131. The water stored in the heat storage tank 130 by circulating through the flow path 212 acts as a load of the first load side heat exchanger 210, and the user stores the water stored in the heat storage tank 130 (hot water in winter or cold water in summer). Will be used.

In the present embodiment, the second heat exchange part 220 has a plate shape in which a second heat exchanger flow path 222 is provided to exchange heat with the 2-1 refrigerant flow path 221 and the 2-1 refrigerant flow path 221. It is in the form of a heat exchanger.

In addition, in the present embodiment, the third heat exchange unit 230 is provided with a third heat medium flow path 232 for exchanging heat with the 3-1 refrigerant flow path 231 and the 3-1 refrigerant flow path 231. It is in the form of a plate heat exchanger.

In the present embodiment, the fourth heat exchanger 240 is in the form of a plate heat exchanger in which the 4-1 refrigerant flow passage 241 and the 4-2 refrigerant flow passage 242 are provided to exchange heat with each other.

One end of the first refrigerant pipe 310 is connected to the first end 211 of the 1-1 refrigerant flow path of the first load side heat exchange unit 210, the first refrigerant pipe (310) The first opening and closing valve 311 is provided to control the opening and closing of the 310.

One end of the second refrigerant pipe 320 is connected to the first end of the second-first refrigerant flow path 221 of the second heat exchange part 220, and the other end thereof is the first one of the first load side heat exchange part 210. It is connected to the second end of the first refrigerant flow path 211, the second refrigerant pipe 320 is provided with a second opening and closing valve 321 to control the opening and closing of the second refrigerant pipe (320).

One end of the third refrigerant pipe 330 is connected to the first end of the third-first refrigerant flow path 231 of the third heat exchange part 230, and the third refrigerant pipe 330 is connected to the third refrigerant pipe 330. The third open / close valve 331 is provided to control the opening and closing of the door.

One end of the fourth refrigerant pipe 340 is connected to the second end of the third-first refrigerant flow path 231 of the third heat exchange part 230, and the other end of the fourth refrigerant pipe 340 is the fourth-1 of the fourth heat exchanger 240. It is connected to the first end of the refrigerant flow path 241, the fourth refrigerant pipe 340 is provided with a fourth opening and closing valve (341) for controlling the opening and closing of the fourth refrigerant pipe (340).

The fifth refrigerant pipe 350 connects the second end of the 4-1 refrigerant flow passage 241 of the fourth heat exchanger 240 and the inlet of the receiver 120 to each other.

The sixth refrigerant pipe 360 includes the second end of the second-first refrigerant flow path 221 of the second heat exchange part 220 and the fourth-first refrigerant flow path 241 of the fourth heat exchanger 240. The sixth opening and closing valve 361 is provided to connect the first end to each other and to control the opening and closing of the sixth refrigerant pipe 360 in the sixth refrigerant pipe 360.

The seventh refrigerant pipe 370 connects the second end of the first-first refrigerant flow path 211 of the first load side heat exchanger 210 and the outlet of the receiver 120 to each other, and the seventh refrigerant pipe 370. ) Is provided with a seventh open / close valve 371 to control the opening and closing of the seventh refrigerant pipe 370.

In addition, a first expansion valve 372 is provided in the seventh refrigerant pipe 370.

The eighth refrigerant pipe 380 connects the second end of the third-first refrigerant flow path 231 of the third heat exchanger 230 and the outlet of the receiver 120 to each other, and the eighth refrigerant pipe 380. An eighth opening / closing valve 381 is provided in the eighth refrigerant pipe 380 to control the opening and closing of the eighth refrigerant pipe 380.

In addition, a second expansion valve 382 is provided in the eighth refrigerant pipe 380.

The ninth refrigerant pipe 390 includes the first end of the third-first refrigerant flow path 231 of the third heat exchange part 230 and the fourth-second refrigerant flow path 242 of the fourth heat exchanger 240. The second end is connected to each other, and the ninth refrigerant pipe 390 is provided with a ninth opening and closing valve 391 to control the opening and closing of the ninth refrigerant pipe 390.

The tenth refrigerant pipe 400 is the first end of the first-first refrigerant flow path 211 of the first load side heat exchange unit 210 and the fourth-second refrigerant flow path 242 of the fourth heat exchanger 240. Connecting the second end of each other, the tenth refrigerant pipe 400 is provided with a tenth open-close valve 401 to control the opening and closing of the tenth refrigerant pipe (400).

The eleventh refrigerant pipe 410 includes the first end of the second-first refrigerant flow path 221 of the second heat exchange part 220 and the second refrigerant refrigerant path 242 of the fourth heat exchanger 240. The first end is connected to each other, and the eleventh refrigerant pipe 410 is provided with an eleventh open / close valve 411 to control the opening and closing of the eleventh refrigerant pipe 410.

The 12th refrigerant pipe 420 connects the other end of the third refrigerant pipe 330 and the first end of the 4-2 refrigerant flow path 242 of the fourth heat exchanger 240, and the 12th refrigerant pipe The 420 is provided with a twelfth opening and closing valve 421 to control the opening and closing of the twelfth refrigerant pipe 420.

The thirteenth refrigerant pipe 430 connects the other end of the first refrigerant pipe 310 and the second end of the second-first refrigerant flow path 221 of the second heat exchange part 220 to each other, and the thirteenth refrigerant pipe The 430 is provided with a thirteenth open / close valve 431 to control the opening and closing of the thirteenth refrigerant pipe 430.

With respect to such refrigerant pipes, the four-way valve 180 communicates different refrigerant pipes according to the cooling mode (summer season) and the heating mode (winter season) under the control of the controller.

That is, the four-way valve 180 connects the outlet 111 of the compressor 110 and the other end of the third refrigerant pipe 330 to each other in the cooling mode, and the other end of the first refrigerant pipe 310. It is connected to each other with the inlet 112 of the (110).

In addition, the four-way valve 180 connects the outlet 111 of the compressor 110 and the other end of the first refrigerant pipe 310 to each other in the heating mode, and also the inlet 112 and the third refrigerant of the compressor 110. The other end of the pipe 330 is connected to each other.

On the other hand, the water tank 140 having constant temperature by the geothermal heat is provided.

The water tank 140 is provided underground so that it is always in a geothermal state is affected by the constant temperature of the geothermal will have a constant temperature.

The water stored in the water tank 140 is heat-exchanged with each of the second heat exchange part 220 and the third heat exchange part 230. To this end, the water in the water tank 140 may directly heat-exchange with the second heat exchange part 220 and the third heat exchange part 230. That is, the 2-1st refrigerant flow path 221 of the second heat exchange part 220 is deposited in the water tank 140 in the form of a coil, and the 3-1 refrigerant flow path 231 of the third heat exchange part 230 is The coil may be deposited in the water tank 140.

In this embodiment, the water stored in the water tank 140 is exchanged with each of the second heat exchanger 220 and the third heat exchanger 230 through the brine.

To this end, as described above, the second heat exchanger 220 and the third heat exchanger 230 are in the form of a plate heat exchanger.

In addition, a brine tank 151 in which brine is stored is provided.

In addition, in order to exchange heat with the water stored in the water tank 140, a water tank heat exchanger 152 in the form of a coil is provided inside the water tank 140.

In addition, after the brine stored in the brine tank 151 passes through the 2-2 thermal medium flow path 222 and the 3-2 thermal medium flow path 232, the brine tank flows back to the water tank heat exchanger 152 and then the brine tank ( The brine circulation pipe 153 is provided to return to the 151.

The brine circulation pipe 153 is provided with a brine circulation pump 154 for pressurizing the brine.

On the other hand, in order to increase the constant temperature of the water tank 140 is provided with a structure that can receive more geothermal heat as follows.

That is, the ground heat exchanger 141 is provided perpendicularly to the ground so that the water stored in the water tank 140 can absorb the heat of the ground, and the water stored in the water tank 140 is connected to the ground heat exchanger 141. The underground circulation pipe 142 is provided to circulate, and the underground circulation pipe 142 is provided with an underground circulation pump 143 that can pressurize and transport the water in the water tank 140.

That is, the underground heat exchanger 141 is provided to absorb the geothermal heat through the perforated holes after drilling deeply vertically as in the conventional method using the geothermal heat, whereby the water of the water tank 140 is more constant temperature Will have

Meanwhile, a method of using the water of the water tank 140 and the water of the heat storage tank 130 for the heat exchange ventilator 500 will be described with reference to FIG. 5.

An outdoor passage 510 and an indoor passage 520 are formed in the body of the heat exchange ventilator 500, and the outdoor passage 510 is divided into an outdoor passage 511 and an outdoor passage 512, and an indoor passage 520. ) Is bisected into the indoor passage 521 and the indoor passage 522.

The indoor air is discharged from the interior to the outside through the indoor unit inlet 523, the indoor passage 521, the heat exchanger 530, the indoor passage 522, the indoor unit blower 525, and the indoor unit outlet 524.

The flow path of the indoor air is shown by a white arrow.

On the contrary, the outdoor air is introduced into the room from the outside through the outdoor unit inlet 513, the outdoor passage 511, the heat exchanger 530, the outdoor passage 512, the outdoor unit blower 515, and the outdoor unit outlet 514.

The flow path of outdoor air is shown by the black arrow.

The indoor unit inlet 523, the indoor unit outlet 524, the outdoor unit inlet 513, and the outdoor unit outlet 514 may directly inhale or discharge the indoor or outdoor air without a separate connection device, and in some cases, may be connected to the duct. Intake or exhaust air indoors or outdoors.

The techniques of the heat exchange ventilator as described above are well known techniques and a wide variety of changes are possible. For example, to change the structure or method of the heat exchanger, or to change the arrangement of the indoor or outdoor air blowers, or to connect the main body itself to the ceiling duct so that it is invisible or to be installed on the floor freely. You may.

As one of the heat exchange ventilator as described above, Korean Patent No. 10-0704143 has disclosed a heat exchange ventilator for both heating and cooling using a thermoelectric element, the prior art is considered to be integrated in the present specification.

On the other hand, the outdoor air introduced into the outdoor unit passage may pass through the heat exchanger 530 and then heat exchange with water in the heat storage tank 130 to further increase the cooling and heating effect.

To this end, as shown in FIG. 5, the air conditioning heat exchanger 611 is provided in the outdoor passage 512, and the water stored in the heat storage tank 130 is circulated in the air conditioning heat exchanger 611. Thus, the cooling and heating circulation water pipe 612 is provided to circulate the water of the heat storage tank 130 in the cooling and heating heat exchange part 611, and the cooling and heating circulation pump 613 is provided in the cooling and heating circulation water pipe 612. do.

In addition, the indoor air discharged to the indoor unit passage may again utilize the waste heat of the indoor air discharged to the outside when the heat exchanged with the water of the water tank 140 after passing through the heat exchanger (530).

To this end, the waste heat recovery heat exchanger 621 is provided in the indoor passage 522 as shown in FIG. 5, and the waste heat from the indoor air discharged when the water stored in the water tank 140 is circulated in the waste heat recovery heat exchanger 611. Can be recovered. Thus, the waste heat recovery circulation water pipe 622 is provided to circulate the water of the water tank 140 in the waste heat recovery heat exchanger 621, and the waste heat recovery circulation water pipe 622 is provided with a waste heat recovery circulation pump ( 623 is provided.

As such, the water in the water tank 140 may have higher constant temperature by the heat exchanger 611 for waste heat recovery.

The operation of the heat pump system as described above will be described.

In FIG. 3 and FIG. 4, the open state is shown in white, and the closed state is shown in black.

In the summer, the heat pump system supplies cold heat to the load side, and in particular, in the present embodiment, cold water is formed in the heat storage tank 130.

At this time, the change of the refrigerant of the heat pump system forms a circulation system of compression-> condensation-> subcooling-> expansion-> evaporation-> superheat 1-> superheat 2-> compression as shown in FIG.

The high temperature and high pressure refrigerant gas compressed by the compressor 110 passes through the four-way valve 180 and passes through the third refrigerant pipe 330 into the third-1 refrigerant flow path 231 of the third heat exchanger 230. To condense.

The refrigerant passing through the third heat exchange unit 230 is supercooled in the 4-1 refrigerant flow path 241 of the fourth heat exchanger 240 after passing through the fourth refrigerant pipe 340.

In other words, the 4-1 refrigerant flow path 241 is further cooled, and the condensation temperature is lowered. Thus, the coefficient of performance (C.O.P = freezing effect / compression day) is very high, thereby enabling very economical operation.

The refrigerant supercooled in the 4-1 refrigerant flow path 241 is stored in the receiver 120 after passing through the fifth refrigerant pipe 350.

The refrigerant stored in the receiver 120 is expanded by the first expansion valve 372 while passing through the seventh refrigerant pipe 370 and then the first-first refrigerant flow path 211 of the first load side heat exchange unit 210. Evaporates from

The refrigerant passing through the 1-1 refrigerant flow path 211 of the first load side heat exchanger 210 passes through the 10th refrigerant pipe 400 and then the second refrigerant flow path 242 of the fourth heat exchanger 240. ) Is overheated first.

The refrigerant passing through the 4-2 refrigerant flow passage 242 of the fourth heat exchanger 240 passes through the 11th refrigerant pipe 410 and then the 2-1 refrigerant flow passage 221 of the second heat exchange unit 220. ) Is overheated secondary.

As such, the efficiency of the heat pump system is increased by the process of reheating the refrigerant after the evaporation (primary superheat and secondary superheat).

The refrigerant passing through the second-first refrigerant flow path 221 of the second heat exchange part 220 passes through the four-way valve 180 to the inlet 111 of the compressor 110 after passing through the thirteenth refrigerant pipe 430. Inflow.

The process then repeats the cycle described above.

In the winter, the heat pump system supplies heat to the load side, and in particular, in the present embodiment, hot water is formed in the heat storage tank 130.

At this time, the change in the refrigerant of the heat pump system is a compression system of compression-> condensation-> subcooling 1-> subcooling 2-> expansion-> evaporation-> superheating-> compression as shown in FIG.

The high temperature and high pressure refrigerant gas compressed by the compressor 110 passes through the four-way valve 180 and passes through the first refrigerant pipe 310 to the 1-1 refrigerant flow path 211 of the first load side heat exchanger 210. Inflow and condensation

The refrigerant passing through the first load side heat exchange unit 210 is first supercooled in the 2-1 refrigerant flow path 221 of the second heat exchange unit 220 after passing through the second refrigerant pipe 320.

The refrigerant supercooled in the 2-1 refrigerant flow passage 221 passes through the sixth refrigerant pipe 360 and enters the 4-1 refrigerant flow passage 241 of the fourth heat exchanger 240 to be secondarily supercooled.

In this way, the refrigerant is further cooled in the 2-1 refrigerant flow passage 221 and the 4-1 refrigerant flow passage 241, so that the condensation temperature is lowered. Very high, very economical driving is possible.

The refrigerant supercooled in the 4-1 refrigerant flow path 241 is stored in the receiver 120 after passing through the fifth refrigerant pipe 350.

The refrigerant stored in the receiver 120 is evaporated from the third-first refrigerant flow path 231 of the third heat exchange unit 230 by the second expansion valve 382 while passing through the eighth refrigerant pipe 380.

The refrigerant passing through the 3-1 refrigerant flow path 231 passes through the ninth refrigerant pipe 390 and enters the 4-2 refrigerant flow path 242 of the fourth heat exchanger 240 to overheat.

Thus, the efficiency of the heat pump system is increased by the process of reheating the refrigerant after evaporation.

The refrigerant passing through the 4-2 refrigerant flow passage 242 is introduced into the inlet 111 of the compressor 110 through the four-way valve 180 through the twelfth refrigerant pipe 420.

The process then repeats the cycle described above.

The foregoing description of the present invention is intended for illustration, and it will be understood by those skilled in the art that the present invention may be easily modified in other specific forms without changing the technical spirit or essential features of the present invention. will be. It is therefore to be understood that the embodiments described above are intended to be illustrative, but not limiting, in all respects. For example, each component described as a single entity may be distributed and implemented, and components described as being distributed may also be implemented in a combined form.

The scope of the present invention is shown by the following claims rather than the detailed description, and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as being included in the scope of the present invention. .

110: compressor 120: receiver
180: 4-way valve 130: heat storage tank
140: tank

Claims (6)

Compressor 110 for compressing the refrigerant introduced into the inlet and discharged to the outlet;
A receiver 120 in which the liquefied refrigerant is stored;
A first load side heat exchanger (210) provided with a first-first refrigerant flow path to exchange heat with the load side;
A second heat exchange part 220 in which a 2-1 refrigerant flow path is provided;
A third heat exchange part 230 provided with a 3-1 refrigerant flow path;
A fourth heat exchanger 240 provided to exchange heat of the 4-1 refrigerant flow passage and the 4-2 refrigerant flow passage;
A first refrigerant pipe 310 having one end connected to the first end of the 1-1 refrigerant flow path of the first load side heat exchanger 210;
A first open / close valve 311 provided in the first refrigerant pipe 310;
One end is connected to the first end of the 2-1 first refrigerant flow path of the second heat exchange part 220 and the other end is connected to the second end of the 1-1 refrigerant flow path of the first load side heat exchange part 210. A second refrigerant pipe 320 connected;
A second open / close valve 321 provided in the second refrigerant pipe 320;
A third refrigerant pipe 330 having one end connected to the first end of the 3-1 refrigerant flow path of the third heat exchanger 230;
A third open / close valve 331 provided in the third refrigerant pipe 330;
One end is connected to the second end of the 3-1 refrigerant flow passage of the third heat exchange unit 230 and the other end is connected to the first end of the 4-1 refrigerant flow passage of the fourth heat exchanger 240. A fourth refrigerant pipe 340;
A fourth open / close valve 341 provided in the fourth refrigerant pipe 340;
A fifth refrigerant pipe (350) connecting the second end of the fourth first refrigerant flow path of the fourth heat exchanger (240) and the inlet of the receiver (120) to each other;
A sixth refrigerant pipe connecting the second end of the second-1 refrigerant flow path of the second heat exchange part 220 and the first end of the 4-1 refrigerant flow path of the fourth heat exchanger 240 to each other; 360);
A sixth opening and closing valve 361 provided in the sixth refrigerant pipe 360;
A seventh refrigerant pipe 370 connecting the second end of the first-first refrigerant flow path of the first load side heat exchanger 210 and the outlet of the receiver 120 to each other;
A seventh open / close valve 371 provided on the seventh refrigerant pipe 370;
A first expansion valve 372 provided on the seventh refrigerant pipe 370;
An eighth refrigerant pipe 380 connecting the second end of the third-1 refrigerant flow path of the third heat exchanger 230 and the outlet of the receiver 120 to each other;
An eighth opening / closing valve 381 provided in the eighth refrigerant pipe 380;
A second expansion valve 382 provided in the eighth refrigerant pipe 380;
A ninth refrigerant pipe connecting the first end of the third-1 refrigerant flow path of the third heat exchanger 230 and the second end of the fourth-2 refrigerant flow path of the fourth heat exchanger 240 to each other; 390);
A ninth open / close valve 391 provided in the ninth refrigerant pipe 390;
A tenth refrigerant pipe connecting the first end of the first-first refrigerant flow path of the first load side heat exchanger 210 and the second end of the fourth-2 refrigerant flow path of the fourth heat exchanger 240 to each other; 400;
A tenth open / close valve 401 provided on the tenth refrigerant pipe 400;
An eleventh refrigerant pipe connecting the first end of the second-first refrigerant flow path of the second heat exchange part 220 and the first end of the fourth-second refrigerant flow path of the fourth heat exchanger 240 to each other; 410);
An eleventh open / close valve 411 provided on the eleventh refrigerant pipe 410;
A twelfth refrigerant pipe 420 connecting the other end of the third refrigerant pipe 330 and the first end of the fourth-2 refrigerant flow path of the fourth heat exchanger 240 to each other;
A twelfth open / close valve 421 provided on the twelfth refrigerant pipe 420;
A thirteenth refrigerant pipe 430 connecting the other end of the first refrigerant pipe 310 and the second end of the second-first refrigerant flow path of the second heat exchange part 220 to each other;
A thirteenth open / close valve 431 provided on the thirteenth refrigerant pipe 430;
In the cooling mode, the outlet of the compressor 110 and the other end of the three refrigerant pipes 330 are connected to each other, and the other end of the first refrigerant pipe 310 and the inlet of the compressor 110 In the heating mode, the outlet of the compressor 110 and the other end of the first refrigerant pipe 310 are connected to each other, and the inlet of the compressor 110 and the other end of the third refrigerant pipe 330 to each other. Four-way valve 180 to connect;
Heat pump system, characterized in that comprises a.
The method of claim 1,
The first load side heat exchanger 210 is heat pump system, characterized in that made to heat exchange with the water stored in the heat storage tank (130).
The method of claim 1,
Each of the second heat exchange part (220) and the third heat exchange part (230) is configured to heat exchange with water stored in a water tank having constant temperature by geothermal heat (140).
The method of claim 3, wherein
The second heat exchange part 220 is provided with a second-2 heat medium flow path so as to exchange heat with the second-1 refrigerant flow path.
The third heat exchange part 230 is provided with a third-2 heat medium flow path to exchange heat with the 3-1 refrigerant flow path.
A brine tank 151 in which brine is stored, a water tank heat exchanger 152 for exchanging heat with water stored in the water tank 140, and brine stored in the brine tank 151 are the second to second heat medium flow paths and the third. The brine circulation pipe 153, which is provided to return to the brine tank 151 after flowing through the two-medium fluid flow path to the water tank heat exchanger 152, is pressurized to transfer the brine to the brine circulation pipe 153. Heat pump system, characterized in that the brine circulation pump is further added.
The method of claim 3, wherein
Underground heat exchanger 141 is provided perpendicular to the ground so that the water stored in the water tank 140 can absorb the heat of the ground, the water stored in the water tank 140 can circulate the ground heat exchanger 141 Underground circulation pipe 142 is provided so that, the underground circulation pump 143 is provided in the underground circulation pipe 142 is further characterized in that the heat pump system.
The method of claim 1,
The first load side heat exchanger 210 is made to exchange heat with water stored in the heat storage tank 130,
Each of the second heat exchange part 220 and the third heat exchange part 230 is made to exchange heat with water stored in the water tank 140 having constant temperature by geothermal heat,
The water in the heat storage tank 130 exchanges heat with outdoor air introduced into the room along the outdoor passage of the heat exchange ventilator.
The water of the tank 140 is to heat exchange with the indoor air discharged to the outside along the indoor passage of the heat exchange ventilator
Heat pump system characterized in that.

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