KR101205679B1 - Quick water heating apparatus in air conditioner using of the subterranean heat - Google Patents

Abstract

The present invention relates to a hot water supply device provided in an air conditioning system that performs heat exchange using geothermal heat.

The hot water supply apparatus of an air conditioner using geothermal heat according to the present invention includes a hot water supply pump 400 having a hot water evaporator 410 and a hot water condenser 412 in which heat exchange occurs; An underground heat exchanger (300) connected to the hot water evaporator (410) to exchange heat with underground heat; A hot water supply tank 430 connected to the hot water condenser 412 and heated to store water; . In addition, a hot water supply circulation pipe 420 in which exchange water flows is connected between the hot water supply pump 400 and the hot water tank 430, and a plurality of hot water supplies for compressing a refrigerant in the hot water heat pump 400. Compressors 414 and 414 'are installed. According to the present invention as described above, there is an advantage that stable heating and cooling is possible and the hot water supply cost is reduced.

Air Conditioning, Heat Pump, Geothermal Heat, Hot Water Supply

Description

Quick water heating apparatus in air conditioner using of the subterranean heat}

1 is a state diagram of the installation of a conventional air conditioner.

Figure 2 is a block diagram showing the configuration and refrigerant flow of the conventional air conditioner.

Figure 3 is an installation state of the air conditioner using geothermal heat is applied to the hot water supply apparatus according to the present invention.

Figure 4 is a block diagram showing the configuration and refrigerant flow of the air conditioner using geothermal heat employed in the embodiment of the present invention.

5 is a configuration diagram of an outdoor unit that is a main portion of an air conditioner using geothermal heat in which an embodiment of the present invention is employed.

Figure 6 is a block diagram showing a connection state of the auxiliary heat source constituting the air conditioner using geothermal heat employed in the embodiment of the present invention.

Figure 7 is a block diagram showing the configuration of the heat pump for hot water constituting the embodiment of the present invention.

Figure 8 is an operating state showing a state in which the circulation medium circulates along the circulation pipe in the air conditioner using geothermal heat employing an embodiment of the present invention.

Figure 9 is an operational state diagram showing the circulating medium flow state when the hot water heat pump is operated in the air conditioner using geothermal heat is employed embodiment of the present invention.

Figure 10 is a use state showing the case that the hot water supply pump constituting the embodiment of the present invention is operated alone.

Explanation of symbols on the main parts of the drawings

100. Outdoor unit 102. Outdoor solenoid valve

120. Constant speed compressor 120 '. Inverter Compressor

120a. Refrigerant injector 121.

121 '. Strainer Oil Temperature Sensor 122. Oil Separator

123. Oil return pipe 124. Four-way valve

130. Supercooler 130 '. Station

130'a. Subcooling Expansion Valve 132. Accumulator

140. Outdoor heat exchanger 200. Indoor unit

202. Indoor heat exchanger 204. Expansion valve

210. Common fluid line 210 '. Basin

210 ". Outdoor liquid pipe 212. Common pipe

212 '. Branches 212 ". Outdoor

214. High and low pressure common pipe 300. Underground heat exchanger

310. Circulation piping 312. Supply piping

314. Return piping 320. Circulation pump

330. Filling tanks 332.

334. Filling valves 340. Storage tanks

400. Hot water supply pump 402. Heat pump supply pipe

410. Hot water evaporator 412. Hot water condenser

414. Hot Water Constant Compressor 414 '. Hot Water Inverter Compressor

416. Hot water oil separator 420. Hot water circulation pipe

422. Hot water piping 424. Hot water accumulator

426. Hot water expansion valve 430. Hot water tank

450. Boiler 452. Boiler supply pipe

454. Boiler Supply Valves 456. Boiler Temperature Sensors

460. Cooling tower 462. Cooling tower supply pipe

464. Cooling tower supply valve 466. Cooling temperature sensor

468. Cooling pump

The present invention relates to a hot water supply device, and more particularly, to a hot water supply device provided in an air conditioning system for performing heat exchange using geothermal heat.

An air conditioning system, commonly referred to as an air conditioner, cools a room by a repetitive action of inhaling hot air in a room, exchanging heat with a low temperature refrigerant, and then discharging it into the room. / Heating system, consisting of a compressor-condenser-expansion valve-evaporator to form a series of cycles.

Recently, in addition to heating and cooling, there are various additional functions such as the air purifying function that inhales and filters contaminated air in the room and makes it into clean air and reinjects it into the room, and the dehumidification function of making humid air into wet and dry air again. It also functions.

Meanwhile, as is well known, an air conditioner may be classified into a separate type air conditioner in which an outdoor unit and an indoor unit are separately installed, and an integrated air conditioner in which the outdoor unit and the indoor unit are integrally installed.

1 is a schematic view showing an installation state of a conventional air conditioner, and FIG. 2 is a block diagram showing a configuration of a conventional air conditioner and a flow of a refrigerant. Referring to this, the outdoor unit 1 includes a compressor 10, an accumulator 20, an outdoor heat exchanger 30, and the like, and the indoor unit 50 includes an indoor heat exchanger 60 and an expansion valve 70.

In the air conditioner, a plurality of indoor units 50 are connected to one outdoor unit 1, and a high pressure pipe 80 having a high pressure and a relatively low pressure are connected between the outdoor unit 1 and the indoor unit 50. Low pressure pipe 90 is connected to each.

When the air conditioner of the configuration described above performs the cooling action, the outdoor heat exchanger 30 of the outdoor unit 1 serves as a condenser to condense the high-temperature / high pressure gaseous refrigerant fed from the compressor 10. The refrigerant condensed as described above is expanded to a low-temperature / low-pressure gas while passing through the expansion valve 70 and is sent to the indoor heat exchanger 60.

The refrigerant introduced into the indoor heat exchanger 60 is converted into a two-phase refrigerant in which gaseous and liquid states of low temperature / low pressure are mixed as heat is exchanged with indoor air. After the refrigerant passes through the accumulator 20, the refrigerant is sent back to the compressor 10 to form one cycle of the refrigerant.

Next, when the air conditioner performs the heating operation, the flow of the refrigerant and the action of the heat exchanger are reversed. That is, the refrigerant compressed by the compressor 10 flows in the order of the accumulator 20-> indoor heat exchanger 60-> expansion valve 70-> outdoor heat exchanger 30.

At this time, the indoor heat exchanger 60 serves as a condenser for heat exchange between the high temperature and high pressure refrigerant passing through the inside and the indoor air, and the outdoor heat exchanger 30 heat exchanges the low temperature low pressure refrigerant and the outdoor air therein. It acts as an evaporator.

As described above, in the conventional air conditioning system (air conditioner), a method of using outside air (outside air) as a heat source of the outdoor heat exchanger 30 has been mainly used. That is, the air conditioning system provided with the outdoor unit 1 also called air heat exchange type heat pumps (EHP, GHP) which uses outside air (outside air) as a heat source has been used.

However, in such a heat exchange system using air, the temperature of the outside air is too low during heating and, conversely, too high during cooling. Therefore, there is a problem in that a large amount of energy is consumed for heat absorption and discharge of the refrigerant. As such, when the temperature of the outside air is not constant, there is a problem that stable cooling and heating operation is difficult due to an abnormal phenomenon of a heat source required for cooling and heating.

On the other hand, in order to solve the problem of the heat exchange system using the outside air (external air) as described above, in recent years, a basic air conditioning system that performs outdoor heat exchange using geothermal heat as a heat source has emerged. Therefore, the air conditioner using geothermal heat exchanges the ground heat as a heat source without being affected by the outside temperature, and thus exhibits a higher thermal efficiency (COP, EER) than the air conditioning system using air.

However, many problems appear in the conventional air conditioning system using such geothermal heat. In other words, despite the advantages such as improved thermal efficiency, if the refrigerant that flowed indoors during the cooling and heating operation, and the refrigerant flowed into the outdoor heat exchanger does not sufficiently absorb / discharge heat into the ground, the stability and reliability of the cooling / heating operation I still have problems falling.

In addition, in the air conditioning system as described above, even if the hot water supply device is not provided, or even when the hot water supply device is provided in order to operate the hot water supply system, the entire air conditioning system must be operated, there is a problem in that the use is inconvenient and the cost is increased.

Accordingly, an object of the present invention is to solve the problems of the prior art as described above, and to provide a hot water supply device for an air conditioner using geothermal heat in which heat exchange is performed using underground heat.

Another object of the present invention is to provide a hot water supply device for an air conditioner using geothermal heat, which can generate hot water using geothermal heat effectively without the operation of the entire air conditioner using geothermal heat.

The hot water supply device of the air conditioner using the geothermal heat according to the present invention for achieving the above object is, a plurality of indoor units that harmonize the air of the indoor space, the outdoor unit is in communication with the indoor unit and a plurality of pipes and heat exchange occurs And a plurality of outdoor units having a heat exchanger and a compressor for compressing a refrigerant, and an underground heat exchanger connected to an outdoor heat exchanger of the outdoor unit and buried underground to allow heat exchange between the underground heat and the circulation medium circulating therein. An air conditioner using geothermal heat, comprising: a hot water heating pump connected to the outdoor unit and the underground heat exchanger and including a hot water evaporator and a hot water condenser to exchange heat with the circulation medium; A hot water tank installed in connection with the hot water condenser, the water being heated and stored; The hot water heat pump includes a hot water evaporator that exchanges heat with a first circulation medium that has passed through the underground heat exchanger; A hot water condenser condensed with a second circulation medium to be stored in the hot water tank; A first circulation pipe connecting the underground heat exchanger and the hot water evaporator to guide the first circulation medium; And a second circulation pipe connecting the hot water condenser and the hot water tank to guide the second circulation medium.

Between the hot water supply pump and the hot water tank is characterized in that the hot water circulation pipe through which the exchange water flows.

The hot water supply pump is characterized in that a plurality of hot water compressor for compressing the refrigerant is installed.

The plurality of hot water compressors may include a hot water constant pressure compressor configured to perform a constant speed operation, and a hot water inverter compressor that is a variable speed heat pump.

The constant speed compressor is characterized in that it is additionally operated when the load capacity is increased can not afford the load only by the hot water supply inverter compressor.

According to the present invention as described above, there is an advantage that stable heating and cooling is possible and the hot water supply cost is reduced.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot water supply system for an air conditioning system in which an outdoor unit, also called ground source heat pumps (GSHPs), is used, wherein geothermal heat is used as a heat source of an outdoor heat exchanger, and a predetermined temperature is determined by the geothermal heat. The hot water supply system is connected to the system that performs heat exchange in the outdoor unit using the water (heat exchange water).

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

Figure 3 schematically shows the installation of the air conditioner using the geothermal heat is connected to the embodiment of the present invention, Figure 4 is a schematic block diagram of the air conditioner using the geothermal heat employed in the present invention. .

As shown in these figures, the air conditioning system to which the present invention is employed includes at least one indoor unit 200 that coordinates air in an indoor space, and at least one outdoor unit communicating with the indoor unit 200 by a plurality of pipes ( 100) and underground underground heat exchanger (300) for heat exchange between underground heat and circulating medium circulating therein, and a plurality of secondary heat exchangers for outdoor heat exchanger provided in outdoor unit (100). The secondary heat source (400, 450, 460) and the like.

The outdoor unit 100 is a constant speed compressor 120, an inverter compressor 120 ', an accumulator 132 and an outdoor heat exchanger 140 and an outdoor solenoid valve 102 (LEV: linear expansion valve, hereinafter referred to as' outdoor LEV'). .) And the like, and the indoor unit 200 includes an indoor heat exchanger 202, an expansion valve 204, and the like.

In the air conditioner, a plurality of indoor units 200 are connected to one or more outdoor units 100. The common liquid pipe 210, which is a single pipe through which liquid refrigerant flows, is connected between the outdoor unit 100 and the indoor unit 200, and a gas. The common engine 212, which is a single pipe through which the refrigerant flows, is formed in communication. And between the two or more outdoor unit 100 is installed in communication with the high and low pressure common pipe 214 to maintain the balance of the refrigerant.

The high and low pressure common pipe 214 is installed such that the inlet side of the outdoor heat exchanger 140 provided in the plurality of outdoor units 100 communicates with each other to maintain the balance of the refrigerant between the outdoor units 100. Meanwhile, the refrigerant is also introduced into the outdoor heat exchanger 140 of the outdoor unit 100, which is not used among the plurality of outdoor units 100, thereby bringing an effect of improving heat exchange efficiency. And the high or low pressure common pipe 214 is a high pressure or low pressure refrigerant flows in accordance with the cooling or heating action.

The indoor unit 200 is formed with a branch liquid pipe 210 'through which liquid refrigerant flows, and a branch engine 212' through which gas refrigerant flows, and such a branch liquid pipe 210 'and a branch engine 212' are common. It is in communication with the liquid pipe 210 and the common engine 212.

In addition, the diameters of the plurality of branch liquid pipes 210 'and the branch engine 212' are different depending on the capacity of the indoor unit 200 to be connected.

Meanwhile, the outdoor unit 100 is formed with an outdoor liquid pipe 210 "through which liquid refrigerant flows, and an outdoor engine 212" through which gas refrigerant flows, and the outdoor liquid pipe 210 "and an outdoor engine 212" are respectively formed in the outdoor unit 100. Communicating with the common liquid pipe 210 and the common engine 212.

The plurality of auxiliary heat sources (400, 450, 460) is a device for heating or cooling the circulating medium flowing in the underground heat exchanger (300), two or more of these auxiliary heat sources (400, 450, 460) are operated at the same time, or any one is optional Used as

The plurality of auxiliary heat sources (400, 450, 460) is composed of a hot water supply pump 400, a boiler 450, and a cooling tower 460, as shown. Of course, the auxiliary heat source (400, 450, 460) may be provided with any one of the hot water supply pump 400, the boiler 450, the cooling tower 460, or more other devices may be provided.

The hot water heat pump 400 is installed between the outdoor unit 100 and the underground heat exchanger 300 so that the circulation medium circulating the underground heat exchanger 300 emits heat by heat exchange with other exchange water. It is a device to make it.

The boiler 450 is a device installed between the outdoor unit 100 and the underground heat exchanger 300 to heat a circulating medium circulating through the underground heat exchanger 300.

The cooling tower 460 is a device installed between the outdoor unit 100 and the underground heat exchanger 300 to cool the circulating medium circulating the underground heat exchanger 300. Further, a cooling pump 468 for forcing the flow of the circulation medium (water) via the cooling tower 460 is further installed inside or outside the cooling tower 460.

Between the outdoor heat exchanger 140 and the underground heat exchanger 300 of the outdoor unit 100 is provided with a circulation pipe 310 as shown to guide the circulation of the circulation medium, the circulation medium is at least air It consists of a material with a high specific heat, preferably water (H ₂ O).

The circulation pipe 310 is provided with a circulation pump 320 for forcing the flow of the circulation medium. The circulation pump 320 serves to cause the circulation medium inside the circulation pipe 310 to flow in one direction by a power applied from the outside.

In addition, the circulation pipe 310 is further provided with a replenishment tank 330 for replenishing the shortage of the circulation medium flowing through the circulation pipe (310). Then, one side of the replenishment tank 330 is provided with a storage tank 340 for adjusting the pressure of the circulation medium flowing in the circulation pipe 310.

On one side of the hot water supply pump 400, a hot water tank 430 is further provided by the water is heated and stored by heat exchange with the hot water heat pump 400, the hot water heat pump 400 and the hot water tank The hot water pump 432 for forcibly flowing the water circulated between the 430 is installed.

Configuration and connection state of the auxiliary heat source (400, 450, 460) as described above will be described in detail below.

5 schematically shows a configuration of the outdoor unit constituting the air conditioning system according to the present invention.

As shown in the drawing, a plurality of compressors 120 and 120 'are installed inside the outdoor unit 100. The compressors 120 and 120 'compress the refrigerant to be at a high temperature and high pressure. That is, a constant speed compressor 120 for constant speed operation and an inverter compressor 120 ', which is a variable speed heat pump, are installed.

A refrigerant injector 120a is installed at the inlet side of the compressors 120 and 120 '. The refrigerant injector 120a prevents the compressor from being burned by supplying a refrigerant when the compressors 120 and 120 'are overheated according to operating conditions, and the refrigerant used herein is an outdoor heat exchanger 140 to be described below. It is preferred that the refrigerant discharged from is configured to be used.

A constant oil compressor 121 is installed between the constant speed compressor 120 and the inverter compressor 120 'such that the constant speed compressor 120 and the inverter compressor 120' communicate with each other. Accordingly, if a shortage of oil supply occurs in one of the compressors, it is replenished from other compressors to prevent the compressors 120 and 120 'from being burned out due to insufficient flow.

As the compressors 120 and 120 ', a scroll compressor having low noise and high efficiency is used. In particular, the inverter compressor 120' is an inverter scroll compressor in which the rotation speed is controlled according to the load capacity. Therefore, when a small number of indoor units 200 are used and the load capacity is small, the inverter compressor 120 'is operated first, and the constant speed compressor is not available when the load capacity is gradually increased and cannot be handled by the inverter compressor 120'. 120 is activated.

At the outlet side of the constant speed compressor 120 and the inverter compressor 120 ', the compressor discharge temperature sensors 120b and 120'b and the oil separator 122 respectively measure the temperature of the refrigerant discharged from the compressors 120 and 120'. do. The oil separator 122 filters the oil mixed in the refrigerant discharged from the compressors 120 and 120 'to be recovered to the compressors 120 and 120'.

That is, oil used to cool frictional heat generated when the compressors 120 and 120 'are driven is discharged to the outlet of the compressors 120 and 120' together with a refrigerant. The oil in the refrigerant is separated into the oil separator 122. Separated from and sent back to the compressor (120, 120 ') through the oil return pipe (123).

In addition, a check valve 122 ′ is further installed at an outlet side of the oil separator 122 to prevent a backflow of the refrigerant. That is, when only one of the constant speed compressor 120 or the inverter compressor 120 'is operated, the compressed refrigerant is not flowed back into the stationary compressors 120 and 120'.

The oil separator 122 is configured to communicate with the four-way valve 124 by the pipe. The four-way valve 124 is arranged to change the flow direction of the refrigerant according to the cooling and heating operation, each port is an outlet (or oil separator) of the compressor (120, 120 '), the inlet of the compressor (120, 120') Or an accumulator), an outdoor heat exchanger 140, and an indoor unit 200.

Therefore, the refrigerant discharged from the constant speed compressor 120 and the inverter compressor 120 'is collected in one place, and then flows into the four-way valve 124. The compressors 120 and 120' are provided at the inlet of the four-way valve 124. The high pressure sensor 124 'for checking the pressure of the refrigerant discharged from the is installed.

Meanwhile, a hot gas pipe 125 for allowing a part of the refrigerant flowing into the four-way valve 124 from the oil separator 122 to be directly introduced into the accumulator 132 will be described below. It is installed across the directional valve (124).

When the hot gas pipe 125 needs to increase the pressure of the low pressure refrigerant flowing into the accumulator 132 during the operation of the air conditioner, the high pressure refrigerant at the discharge port of the compressors 120 and 120 'is directly directed to the inlet side of the compressor 120 and 120'. In order to be supplied, such a hot gas pipe 125 is provided with a hot gas valve 125 ′, which is a bypass valve, to open and close the pipe.

In addition, the subcooler 130 is provided inside the outdoor unit 100. The supercooler 130 is a subcooling means for further cooling the refrigerant heat exchanged in the outdoor heat exchanger 140, which will be described below, of the outdoor liquid pipe 210 "connected to the outlet side of the outdoor heat exchanger 140. It is formed at an arbitrary position.

The supercooler 130 is formed of a double tube. That is, the outdoor liquid pipe 210 " is provided on the inside, and a reverse feed pipe 130 'is formed on the outside. Thus, the reverse feed pipe 130' is branched from the outlet of the supercooler 130. The transfer pipe 130 'is provided with a supercooled expansion valve 130'a for cooling the refrigerant by expansion.

In this case, a part of the refrigerant discharged from the subcooler 130 is introduced into the reverse transfer pipe 130 'and cooled while passing through the subcooling expansion valve 130'a, and the cooled refrigerant is the subcooler ( While refluxing 130, the inner refrigerant is further cooled. The countercurrent coolant exiting the subcooler 130 is supplied to the accumulator 132 to be described below and circulated.

On the other hand, the outlet of the subcooler 130 is installed with a liquid pipe temperature sensor 130a for measuring the temperature of the refrigerant discharged from the outdoor unit 100, the subcooling inlet sensor 130 at the outlet of the subcooling expansion valve (130'a). 'b) is provided to measure the temperature of the reflux refrigerant flowing into the subcooler 130, the supercooling outlet sensor 130'c in the reverse transfer pipe 130' flowing the reflux refrigerant discharged from the subcooler 130 ) Is provided.

Therefore, the refrigerant passing through the outdoor heat exchanger 140 flows through the center portion and is configured such that the low temperature refrigerant expanded by an expansion valve (not shown) flows in the opposite direction to lower the temperature of the refrigerant.

One side of the subcooler 130, that is, a dryer 131 is provided on one side of the outdoor liquid pipe 210 ″ in which the refrigerant discharged from the outdoor heat exchanger 140 to be described below is guided to the indoor unit 200. The dryer 131 serves to remove moisture contained in the refrigerant flowing through the outdoor liquid pipe 210 ".

An accumulator 132 is installed between the constant speed compressor 120 and the inverter compressor 120 ′. The accumulator 132 filters the liquid refrigerant so that only the gaseous refrigerant flows into the compressors 120 and 120 '.

That is, when the refrigerant remaining in the liquid phase without being evaporated into gas among the refrigerant flowing from the indoor unit 200 directly flows into the compressors 120 and 120 ', the compressor is formed into a gaseous refrigerant having a high temperature and high pressure. ), The load is increased, which causes damage to the compressors 120 and 120 '.

Therefore, among the refrigerants introduced into the accumulator 132, the refrigerant which is not evaporated and remains in the liquid phase is stored in the lower part of the accumulator 132 because it is relatively heavier than the refrigerant in the gas phase, and only the gaseous refrigerant in the upper portion of the compressor 120, 120 Flows into '). On the other hand, the inlet side of the accumulator 132 is provided with a suction pipe temperature sensor 132 ′ for measuring the temperature of the refrigerant sucked and a low pressure sensor 132 ″ for checking the pressure of the refrigerant.

The outdoor heat exchanger 140 is provided inside the outdoor unit 100. The outdoor heat exchanger 140 is a water-cooled heat exchanger such that heat exchange occurs between a refrigerant flowing inside and a circulation medium flowing along the circulation pipe 310.

Although not shown, the outdoor heat exchanger 140 made of a water-cooled heat exchanger is preferably made of a plate heat exchanger type in which a plurality of thin plates are alternately stacked. Therefore, some of such thin plates are configured such that a refrigerant passes therein, and some of the thin plates pass through the circulation medium (water). That is, the thin plates through which the coolant and the circulating medium pass are laminated alternately so that the coolant and the circulating medium flow in a direction crossing each other inside the thin plates.

6 illustrates the configuration and connection state of the auxiliary heat sources 400, 450, and 460 in more detail.

As shown in the figure, the outdoor heat exchanger 140 of the outdoor unit 100 is connected to the refrigerant pipe and the circulation pipe 310 communicating with the indoor heat exchanger 202. That is, the outdoor heat exchanger 140 is connected to the outdoor liquid pipe 210 ", the outdoor engine 212", and the circulation pipe 310, respectively.

Accordingly, heat exchange occurs between the refrigerant flowing in the outdoor liquid pipe 210 ″ and the outdoor engine 212 ″ and the circulation medium (water) flowing in the circulation pipe 310. The circulation pipe 310 is formed to form a closed circuit as a whole, so that the circulation medium therein is continuously circulated while being blocked from the outside.

The underground heat exchanger (300) is a heat exchange between the heat of the underground and the circulation medium flowing in the circulation pipe 310, buried in the deep underground. That is, it is usually preferable to be buried up to 200m above the ground, the depth of the underground heat exchanger 300 depends on the climate of the installation area, it is buried at a depth that can maintain the annual average temperature of the area at all times desirable.

The geothermal heat exchanger 300 may be provided in plurality, it is preferably made of a zigzag shape bent a plurality of times as shown.

As described above, the circulation pipe 310 is connected between the underground heat exchanger 300 and the outdoor heat exchanger 140 to guide the circulating medium (water). The circulation pipe 310 is a supply pipe 312 for guiding the circulation medium to the underground heat exchanger 300 and the circulation medium via the underground heat exchanger 300 is the outdoor heat exchanger 140 again. Return pipe 314 or the like to guide the return to the.

The return pipe 314 is provided with a circulation temperature sensor 316. More specifically, the circulation temperature sensor 316 is installed at the outlet side of the underground heat exchanger 300, and the circulation temperature sensor 316 measures the temperature of the circulation medium via the underground heat exchanger 300. The value measured by the circulation temperature sensor 316 is transmitted to a controller (not shown) that controls the entire system.

The hot water heat pump 400 is used together with the underground heat exchanger 300 or optionally used. That is, it is also possible to use only the hot water supply heat pump 400 for heat exchange of the outdoor heat exchanger 140 without using the underground heat exchanger 300.

A heat pump supply pipe 402 and a heat pump return pipe 402 'are respectively installed between the circulation pipe 310 and the hot water supply pump 400 to guide the flow of the circulation medium (water). Looking in more detail, a heat pump supply pipe 402 for guiding the circulating medium from the supply pipe 312 to the hot water supply pump 400 is branched, from the return pipe 314 the hot water supply pump The heat pump return pipe 402 'which leads the circulating medium via 400 and then returns to the return pipe 314 is branched.

A connection portion of the supply pipe 312 and the heat pump supply pipe 402 is provided with a heat pump supply valve 404, and a connection portion of the return pipe 314 and the heat pump return pipe 402 ′ is a hot water return valve 404. ') Is provided. The heat pump supply valve 404 and the hot water supply return valve 404 ′ are composed of three-way valves (three-way valves) capable of controlling fluid flow in three directions.

Therefore, the heat pump supply valve 404 is the circulating medium flowing out of the outdoor heat exchanger 140 along the supply pipe 312 simultaneously to both sides of the underground heat exchanger 300 and the hot water supply pump 400. It is to be supplied, or to be controlled to be supplied to any one side of the underground heat exchanger 300 and the hot water heat pump 400.

The heat pump return pipe 402 'is provided with a hot water temperature sensor 406. That is, the hot water supply temperature sensor 406 is installed at the outlet side of the hot water supply heat pump 400, and the hot water temperature sensor 406 is supplied from the hot water supply heat pump 400 through the heat pump return pipe 402 ′. It measures the temperature of the circulating medium discharged. The hot water temperature sensor 406 is connected to a controller (not shown) to provide the measured temperature to the controller.

Heat exchange takes place inside the hot water heat pump 400. That is, not only heat exchange with the circulation medium, but also heat exchange occurs with the exchange water (water) flowing through the hot water circulation pipe 420 to be described below.

The hot water supply tank 430 is connected to one side (the right side in FIG. 6) of the hot water heat pump 400. Then, the hot water supply condenser 412 to be described below and the hot water supply tank 430 is connected to the hot water circulation pipe 420 forming a closed circuit, the hot water circulation pipe 420 inside the exchange water (water) is circulated Done. Accordingly, heat exchange occurs while the exchange water (water) flowing in the hot water circulation pipe 420 passes through the hot water condenser 412, and the hot water exchanged by the heat exchange along the hot water circulation pipe 420. The water is introduced into the tank 430 to exchange heat with water stored in the hot water tank 430. In this case, the water stored in the hot water tank 430 is heated.

The hot water circulation pipe 420 is provided with a hot water pump 432. The hot water pump 432 is a pump that allows the exchange water (water) flowing in the hot water circulation pipe 420 to continuously flow in one direction, and is operated by a power supplied from the outside.

The boiler 450 is for heating the circulation medium and is connected to the circulation pipe 310. That is, the return pipes 314 of the circulation pipes 310 are connected to each other.

Looking in more detail, the boiler 450 is to heat the circulating medium by the energy supplied from the outside, between the boiler 450 and the return pipe 314 between the boiler supply pipe 452 and the boiler return pipe ( 452 'are in communication with each other.

The boiler supply pipe 452 is a flow path for guiding the circulation medium flowing inside the return pipe 314 into the boiler 450, and the boiler return pipe 452 'is circulated through the boiler 450. The flow path guides the medium to return to the return pipe 314.

A boiler supply valve 454 and a boiler return valve 454 'are respectively installed at the connection portion between the return pipe 314, the boiler supply pipe 452, and the boiler return pipe 452'. Like the heat pump supply valve 404 and the hot water return valve 404 'described above, the boiler supply valve 454 and the boiler return valve 454' include three-way valves capable of controlling fluid flow in three directions. Therefore, the circulation medium supply to the boiler 450 is controlled according to the opening and closing of the boiler supply valve 454 and the boiler return valve 454 '.

A boiler temperature sensor 456 is installed in the boiler return pipe 452 '. That is, the boiler temperature sensor 456 is a sensor for measuring the temperature of the circulating medium via the boiler 450, and the value (measurement temperature) measured by the boiler temperature sensor 456 is transmitted to the controller.

The cooling tower 460 is connected to the return pipe 314. The cooling tower 460 is a device for cooling the circulation medium by contact with air. Since the cooling tower 460 is a device used for cooling the cooling water in a factory or the like, its detailed configuration and principle are omitted.

The cooling tower supply pipe 462 and the cooling tower return pipe 462 ′ are respectively communicated between the return pipe 314 and the cooling tower 460. The cooling tower supply pipe 462 is a flow path for guiding the circulation medium flowing inside the return pipe 314 into the cooling tower 460, and the cooling tower return pipe 462 ′ is circulated through the cooling tower 460. The flow path guides the medium to return to the return pipe 314.

Cooling tower supply valve 464 and cooling tower return valve 464 'are respectively provided at the connection portion between the return pipe 314, the cooling tower supply pipe 462, and the cooling tower return pipe 462'. The cooling tower supply valve 464 and the cooling tower return valve 464 'are made of a three-way valve capable of controlling fluid flow in three directions similarly to the heat pump supply valve 404 and the hot water supply return valve 404' described above. Therefore, the supply of the circulation medium to the cooling tower 460 is controlled in accordance with the opening and closing of the cooling tower supply valve 464 and the cooling tower return valve 464 '.

The cooling tower return pipe 462 ′ is provided with a cooling temperature sensor 466. That is, the cooling temperature sensor 466 is a sensor for measuring the temperature of the circulating medium via the cooling tower 460, and the value (temperature) measured by the cooling temperature sensor 466 is transmitted to the controller.

On the other hand, the cooling tower return pipe 462 'is further provided with a cooling pump 468. The cooling pump 468 applies pressure in one direction (the right in FIG. 6) so that the circulation medium via the cooling tower 460 flows to the outdoor heat exchanger 140 through the return pipe 314. That is, the circulating medium introduced into the cooling tower 460 is exposed to the air for heat exchange with the air, and then collected again to flow through the cooling tower return pipe 462 '. As such, the cooling pump 468 forces the flow of the circulation medium flowing through the cooling tower return pipe 462 'and prevents the backflow of the circulation medium.

The circulation pump 320 is to force the flow of the circulation medium flowing through the circulation pipe 310, it is preferably installed in the return pipe (314). In more detail, as shown, the circulation pump 320 is installed between the storage tank 340 and the boiler 450 to force the flow of the circulation medium in one direction (the right side in FIG. 6).

The replenishment tank 330 is a circulating medium storage device for supplying a circulating medium to the circulation pipe 310. That is, the replenishment tank 330 is for replenishing the circulating medium lacking due to leakage or evaporation through the circulation pipe 310.

The replenishment tank 330 is configured to communicate with the return pipe 314 and the replenishment pipe 332. The replenishment pipe 332 is provided with a replenishment valve 334 to control the circulation medium supplied to the return pipe 314 by opening and closing the replenishment pipe 332.

The replenishment valve 334 is configured to be opened and closed manually by a user, or automatically opened and closed by the control of a controller (not shown).

The storage tank 340 is for controlling the pressure of the circulation medium flowing in the circulation pipe 310, it is formed to communicate with the return pipe 314 and the storage pipe 342. That is, the storage tank 340 is to be a buffer area for adjusting the pressure of the circulation medium inside the circulation pipe 310 that changes instantaneously, as shown, spaced apart from the return pipe 314 or the return pipe It is integrally formed in the middle of 314.

7 is a block diagram showing the configuration of the hot water supply pump 400.

As shown in the figure, a plurality of parts such as a hot water evaporator 410 and a hot water condenser 412 are installed in the hot water heat pump 400, the hot water evaporator 410 and a hot water condenser 412. The hot water supply pipes 422 communicate with each other. In addition, the hot water refrigerant flows through the hot water supply pipe 422.

The hot water evaporator 410 and the hot water condenser 412 are heat exchangers corresponding to the outdoor heat exchanger 140 and the indoor heat exchanger 202, and are water-cooled heat exchangers in which heat exchange occurs by water, not air. In addition, the hot water refrigerant is preferably made of the same refrigerant as the refrigerant flowing between the indoor heat exchanger 202 and the outdoor heat exchanger (140).

In more detail, the hot water evaporator 410 causes heat exchange between the hot water flowing in the circulation pipe 310 and the hot water refrigerant flowing in the hot water pipe 422. The hot water condenser 412 is a portion in which the hot water refrigerant flowing through the hot water supply pipe 422 and the exchange water (water) circulating inside the hot water circulation pipe 420 exchange heat with each other.

The hot water evaporator 410 serves as an evaporator. Therefore, in the hot water evaporator 410, the hot circulation medium and the low temperature hot water refrigerant exchange heat with each other. Therefore, in the hot water evaporator 410, the hot circulation medium is cooled and condensed, and the hot hot water refrigerant is evaporated to receive high temperature (preferably gas state).

On the other hand, the hot water condenser 412 serves as a condenser. Therefore, in this hot water condenser 412, the hot hot water refrigerant and the low temperature exchange water exchange with each other. Therefore, in the hot water condenser 412, the hot hot water refrigerant is cooled and condensed, and the low temperature exchange water receives heat to become high temperature (preferably in a gas state).

The hot water supply pipe 422 is divided into a hot water liquid pipe 422 'and a hot water pipe 422 ". The hot water liquid pipe 422' is a tube through which a relatively high pressure hot water refrigerant flows. Hot water refrigerant is introduced into the hot water evaporator 410 through 422 ', and the hot water supply pipe 422 "is a tube through which a hot water refrigerant having a relatively low pressure flows. The hot water refrigerant passing through the hot water vaporizer 410 flows.

The hot water supply pipe 422 ″ is provided with a plurality of hot water compressors 414 and 414 '. The hot water compressors 414 and 414' compress the hot water refrigerant to obtain a high temperature and high pressure, and the hot water constant pressure compressor 414 performs constant speed operation. And a hot water inverter compressor 414 ', which is a variable speed heat pump.

The hot water compressors 414 and 414 'are preferably used as the compressors having low noise and high efficiency, such as the compressors 120 and 120' described above. Particularly, the hot water compressors 414 'are the loads of the hot water compressors 412. Inverter scroll compressors are used in which the speed is adjusted according to the capacity. Therefore, when the load acting on the hot water supply condenser 412 is relatively small, only the hot water supply inverter compressor 414 'is first operated, and the load capacity gradually increases, so that only the hot water supply inverter compressor 414' cannot be handled. The hot water constant-pressure compressor 414 is finally started.

The hot water oil separator 416 is provided at the outlet side of the hot water inverter compressor 414 '. The hot water oil separator 416 filters the oil mixed in the refrigerant discharged from the hot water inverter compressor 414 'and recovers the oil into the hot water inverter compressor 414'. That is, oil used to cool the frictional heat generated when the hot water supply inverter compressor 414 'is driven is discharged to the outlet of the hot water supply inverter compressor 414' along with the hot water refrigerant, and the oil in the refrigerant It is separated from the hot water oil separator 416 and sent back to the hot water inverter compressor 414 'through the hot water oil recovery pipe 416'.

Further, a hot water check valve 417 is further installed at the outlet side of the hot water oil separator 416 and the hot water constant pressure compressor 414 to prevent backflow of the refrigerant. That is, the hot water check valve 417 prevents the hot water refrigerant from flowing back into the hot water supply compressors 414 and 414 'when only one of the hot water constant pressure compressor 414 and the hot water inverter compressor 414' is operated.

The refrigerant discharged from the hot water constant pressure compressor 414 and the hot water inverter compressor 414 ′ join each other at the confluence valve 418 and then flow into the hot water condenser 412.

A hot water accumulator 424 is installed at the inlet side of the hot water constant pressure compressor 414 and the hot water inverter compressor 414 '. The hot water accumulator 424 filters the liquid refrigerant so that only the gaseous refrigerant flows into the hot water compressors 414 and 414 '. That is, the hot water coolant that is not evaporated by gas among the hot water coolant refrigerants discharged through the hot water vaporizer 410 is stored in the lower portion of the hot water accumulator 424 because it is relatively heavier than the hot water hot water coolant. Only the gaseous hot water refrigerant of the upper portion flows into the hot water compressors (414 and 414 ').

A hot water expansion valve 426 is installed in the hot water liquid pipe 422 '. The hot water expansion valve 426 functions as the expansion valve 204 provided in the indoor unit 200, and serves to depressurize the hot water refrigerant flowing into the hot water vaporizer 410.
The circulation pipe 310 connecting the hot water evaporator 410 and the underground heat exchanger 300 may be a first circulation pipe, and the hot water supply connecting the hot water condenser 412 and the hot water tank 430. The circulation pipe 420 may be a second circulation pipe.
In addition, the exchange water circulating in the first circulation pipe may be referred to as a first circulation medium, and the circulation water flowing in the second circulation pipe may be referred to as a second circulation medium.
Therefore, depending on whether the heat pump supply valve 404 is open, the first circulation medium and the second circulation medium may flow together, and only the second circulation medium may flow.

It looks at the operation of the hot water supply device of the air conditioner using geothermal heat according to the present invention having the configuration as described above.

First, referring to Figure 4 looks at the flow of the refrigerant and the circulation medium of the air conditioner using the geothermal heat.

Since a closed circuit through which refrigerant flows is formed between the indoor unit 200 and the outdoor unit 100, the refrigerant exchanges heat while circulating the outdoor unit 100 and the indoor unit 200 as shown by the arrows.

At this time, the outdoor heat exchanger 140 is composed of a water-cooled heat exchanger. Therefore, in the outdoor heat exchanger 140, a refrigerant circulating between the indoor unit 200 and the outdoor unit 100 and a circulating medium (water) circulating between the outdoor unit 100 and the underground heat exchanger 300 are mutually selected. Heat exchange will occur.

On the other hand, the flow of the refrigerant flowing between the indoor unit 200 and the outdoor unit 100 is the direction of the flow is opposite to each other according to the cooling or heating of the indoor space. On the other hand, the direction of the circulation medium (water) flowing along the circulation pipe 310 is always constant and does not need to be reversed. That is, it is continuously flowing in the direction shown by the arrow in FIG.

Next, with reference to FIGS. 4 and 5 will be described in more detail with respect to the flow of the refrigerant flowing between the outdoor unit 100 and the indoor unit 200 and each action.

As described above, in the air conditioning system according to the present invention, a plurality of indoor units 200 are connected to one outdoor unit 100, and some or all indoor units 200 are operated according to a user's selection.

When the air conditioning system is operated (cooling operation), the outdoor LEV 102 is opened so that refrigerant flows between the outdoor unit 100 and the indoor unit 200.

First, referring to the refrigerant flow in the outdoor unit 100, the gas refrigerant flowing from the indoor unit 200 passes through the four-way valve 124 and then enters the accumulator 132. The gas refrigerant leaving the accumulator 132 is introduced into the compressors 120 and 120 '. Meanwhile, when the refrigerant supplied to the compressors 120 and 120 'is insufficient or the compressors 120 and 120' are overheated, the refrigerant is supplied from the refrigerant injector 120a.

The refrigerant compressed by the compressors 120 and 120 ′ is discharged to the discharge port and passes through the oil separator 122. In the oil separator 122, oil contained in the refrigerant is separated and recovered to the compressors 120 and 120 ′ through the oil recovery pipe 123.

That is, as the refrigerant is compressed in the compressors 120 and 120 ', oil is mixed in the refrigerant. Since the oil is in the liquid state and the refrigerant is in the gas state, the oil is separated from the oil separator 122 which is the gas-liquid separator.

On the other hand, the oil inside the compressors 120 and 120 'on both sides is balanced by the fungal oil pipe 121 connecting the constant speed compressor 120 and the inverter compressor 120'.

The refrigerant passing through the oil separator 122 flows into the outdoor heat exchanger 140 through the four-way valve 124. Since the outdoor heat exchanger 140 functions as a condenser (in the cooling mode), the refrigerant is cooled through heat exchange with a circulating medium to become a liquid refrigerant. The refrigerant passing through the outdoor heat exchanger 140 is further cooled while passing through the subcooler 130.

The refrigerant passing through the supercooler 130 passes through a dryer 131 for removing moisture contained in the refrigerant, and then flows into the indoor unit 200 through the common liquid pipe 210. Meanwhile, some of the refrigerant passing through the compressors 120 and 120 'may be introduced into another outdoor unit 100 through the high and low pressure common pipe 214.

The refrigerant supplied to the other outdoor unit 100 through the high and low pressure common pipe 214 flows into the outdoor heat exchanger 140 of the outdoor unit 100 that is stopped to balance the refrigerant pressure as a whole, and the outdoor unit that is stopped ( The predetermined heat exchange also occurs through the outdoor heat exchanger 140 of 100).

When the refrigerant is supplied to the indoor unit 200 through the common liquid pipe 210, the refrigerant is supplied to each indoor unit 200 in operation through the branched liquid pipe 210 ′ branched from the common liquid pipe 210. The refrigerant is decompressed in the expansion valve 204 and heat exchanges in the indoor heat exchanger 202. At this time, since the indoor heat exchanger 202 serves as an evaporator, the refrigerant becomes low pressure gas through heat exchange.

The refrigerant discharged from the indoor heat exchanger 202 is collected through the branch engine 212 ′ to the common engine 212 and then flows into the outdoor unit 100. The refrigerant introduced into the outdoor unit 100 through the common engine 212 and the outdoor engine 212 ″ enters the accumulator 132 through the four-way valve 124.

In the accumulator 132, the liquid refrigerant that has not been evaporated is filtered out, and only the refrigerant in the gaseous state is selected and supplied to the compressors 120 and 120 '. Through this process, one cycle is completed.

On the other hand, when it is operated by heating operation, the refrigerant flows in the opposite direction to the above, and the amount of refrigerant is controlled in the outdoor LEV (102).

8 and 9 illustrate a state in which the circulation medium (water) flows through the circulation pipe 310.

First, FIG. 8 shows a basic circuit in the case where the underground heat exchanger 300 is used alone. That is, a plurality of auxiliary heat sources 400, 450, and 460 are not used, and a state in which a circulating medium (water) circulates between the outdoor heat exchanger 140 and the underground heat exchanger 300 as an arrow is illustrated.

In this case, the heat pump supply pipe 402 and the heat pump return pipe 402 ', the boiler supply valve 454 and the boiler return valve 454', and the cooling tower supply valve 464 and the cooling tower return valve 464 '. By circulating the flow of the circulating medium to the hot water heat pump 400, the boiler 450 and the cooling tower 460.

Accordingly, the circulation medium flowing along the circulation pipe 310 continuously circulates in the counterclockwise direction as shown by an arrow in FIG. 8, and this flow direction is irrespective of whether the air conditioning system is cooled or heated. Maintain a constant direction. That is, the outdoor heat exchanger 140 is circulated in a constant direction regardless of whether it is used as a condenser or an evaporator.

However, when the outdoor heat exchanger 140 is used as a condenser (in the cooling mode), the circulation medium flowing through the circulation pipe 310 serves to cool the refrigerant in the outdoor heat exchanger 140. On the contrary, when the outdoor heat exchanger 140 is used as an evaporator (when heating mode), the circulation medium flowing through the circulation pipe 310 will serve to heat the refrigerant in the outdoor heat exchanger 140.

When the circulation medium flowing through the circulation pipe 310 is insufficient, the user manually opens the replenishment valve 334 to replenish the circulation medium according to a signal of a controller (not shown), or control of the controller. The replenishment valve 334 is automatically opened and closed accordingly.

In addition, the circulation pump 320 allows the circulation medium flowing through the circulation pipe 310 to continuously flow in one direction (counterclockwise in FIG. 8) without countercurrent flow, and the circulation pump 320 is applied from the outside. It is driven by the power supply.

Such a circulation mechanism is the simplest use mechanism using geothermal heat in the air conditioning system according to the present invention. In this state, when the temperature of the circulation medium measured by the circulation temperature sensor 316 does not reach the required temperature, The auxiliary heat sources 400, 450 and 460 described above are operated. That is, when the temperature of the circulation medium in the return pipe 314 passing through the underground heat exchanger 300 does not become a temperature sufficient to cool or heat the refrigerant in the outdoor heat exchanger 140, the auxiliary heat source. At least one of (400, 450, 460) is operated to cool or heat the circulating medium.

9 illustrates a circulating medium flow when the hot water heating pump 400 is operated. As shown in FIG. 9, the hot water heating pump 400 operates mainly when the air conditioning system according to the present invention is operated in a cooling mode.

First, arrows indicate solid lines when the circulating medium is simultaneously supplied to both the underground heat exchanger 300 and the hot water heat pump 400. Therefore, at this time, the heat pump supply valves 404 are all opened to guide the circulating medium from the outdoor heat exchanger 140 to both the underground heat exchanger 300 and the hot water heat pump 400. do.

In addition, at this time, since the hot water supply tank 430 is also operated, the exchange water flows inside the hot water circulation pipe 420. Therefore, heat exchange occurs in the hot water condenser 412. That is, the hot water refrigerant passing through the hot water condenser 412 is cooled by heat exchange with the exchange water in the hot water circulation pipe 420. In this case, the hot water of the hot water supply tank 430 is heated by the hot exchange water to produce high temperature water.

Meanwhile, the circulating medium cooled while passing through the underground heat exchanger 300 and the hot water heat pump 400 are combined again and introduced into the outdoor heat exchanger 140. In the outdoor heat exchanger 140, the cooled circulation medium and the high temperature refrigerant exchange heat with each other, so that the refrigerant is cooled and the circulation medium is heated.

Next, the flow in which the arrow is shown by the dotted line is a case where the circulation medium passes only through the hot water supply pump 400. That is, there is a case where the circulation medium does not flow through the underground heat exchanger (300).

In this case, the heat pump supply valve 404 blocks the flow path to the underground heat exchanger 300, opens only the flow path to the hot water heat pump 400, and the circulation medium coming out of the outdoor heat exchanger 140 is It is controlled to pass only through the hot water supply pump 400.

In this case, since the hot water tank 430 is also operated as described above, in the hot water evaporator 410, heat exchange occurs between the circulation medium and the hot water refrigerant, and the hot water condenser 412 between the hot water refrigerant and the exchange water. Heat exchange will occur. Therefore, the circulation medium is cooled while passing through the hot water supply pump 400. The circulation and heat exchange of the hot water refrigerant in the hot water heat pump 400 will be described in detail below.

The circulating medium discharged after passing through the hot water supply heat pump 400 has a temperature value measured by the hot water temperature sensor 406, and the measured temperature value is transmitted to a controller (not shown). Therefore, the controller determines whether the temperature of the circulating medium from the hot water supply heat pump 400 is sufficient to cool the refrigerant in the outdoor heat exchanger 140 to determine whether the other auxiliary heat source (cooling tower) is operated. .

For example, when the temperature of the circulating medium from the hot water supply pump 400 is higher than the cooling threshold temperature of the refrigerant to be cooled in the outdoor heat exchanger 140, the circulating medium passes through the cooling tower 460. Should be further cooled. Here, the cooling threshold temperature is a value set as an upper limit of the temperature required for condensation of the gaseous refrigerant in the outdoor heat exchanger 140 during the cooling operation of the air conditioning system.

In addition, the process of heat-exchanging the refrigerant with the circulation medium introduced into the outdoor heat exchanger 140 is as described above.

FIG. 10 illustrates an operation state in which the hot water heat pump 400 exchanges heat with the underground heat exchanger 300, and hot water is generated in the hot water tank 430. That is, FIG. 10 does not operate the outdoor unit 100 and the indoor unit 200 as described above, and the hot water supply pump 400 interacts with the underground heat exchanger 300 in the hot water supply tank 430. The state of use is shown to allow the production of hot water.

As shown in this figure, the circulation medium flows to the underground heat exchanger 300 and the hot water heat pump 400. That is, the outdoor heat exchanger 140 does not flow. Therefore, in this case, the heat pump supply valve 404 is open at both left and right sides and the bottom is closed, and the heat pump return valve 404 ′ is open at both sides and the top is closed, so that the circulation medium is the underground heat exchanger 300. ) And the hot water heat pump 400 flows only on both sides.

In addition, at this time, since the hot water supply tank 430 is also operated, the exchange water flows inside the hot water circulation pipe 420. Therefore, heat exchange occurs in the hot water condenser 412. That is, the hot water refrigerant passing through the hot water condenser 412 is cooled by heat exchange with the exchange water in the hot water circulation pipe 420. In this case, the water inside the hot water tank 430 is heated by the hot exchange water to become hot water.

Referring to Figure 10 looks at the flow of hot water refrigerant in the hot water heat pump 400 in detail.

As shown, in the hot water evaporator 410, heat exchange occurs between the circulating medium and the hot water refrigerant. That is, the circulating medium flowing through the circulation pipe 310 and the hot water refrigerant circulating the hot water supply pipe 422 cross each other to exchange heat.

In more detail, since the hot water evaporator 410 serves as an evaporator, in the hot water evaporator 410, a high temperature circulation medium is cooled, and a low temperature hot water refrigerant is evaporated by receiving heat to evaporate a high temperature refrigerant (gas refrigerant). ).

Then, the hot water refrigerant discharged from the hot water evaporator 410 flows through the hot water supply engine 422 ", and the hot water refrigerant flowing through the hot water supply engine 422" flows into the hot water accumulator 424. .

The hot water accumulator 424 filters the liquid hot water refrigerant. That is, the hot water coolant that is not evaporated by gas among the hot water coolant refrigerants discharged through the hot water vaporizer 410 is stored in the lower portion of the hot water accumulator 424 and is filtered out, and only the gaseous hot water coolant of the upper portion is filtered. The hot water compressors 414 and 414 'are introduced and compressed.

At this time, depending on the load applied to the hot water condenser 412, the hot water compressor (414, 414 ') may be used in part or all. That is, when the load is small, only the hot water supply inverter compressor 414 'is used first, and the hot water constant pressure compressor 414 is additionally added only when the load capacity gradually increases so that only the hot water inverter compressor 414' cannot be handled. Is operated. In addition, since the hot water inverter compressor 414 'is made of a variable speed heat pump, the rotation speed is adjusted according to the size of the load.

The hot water refrigerant passed through the hot water inverter compressor 414 'is introduced into the hot water oil separator 416. In the hot water oil separator 416, the oil mixed in the hot water refrigerant discharged from the hot water inverter compressor 414 'is filtered, and the filtered oil is again supplied through the hot water oil recovery pipe 416'. It is sent back to the inverter compressor 414 '.

The hot water refrigerant discharged from the hot water oil separator 416 and the hot water constant pressure compressor 414 passes through the hot water check valve 417 and joins each other at the confluence valve 418, and then the hot water condenser 412. Flows into.

The hot water condenser 412 is a portion where the hot water refrigerant flowing in the hot water supply pipe 422 and the exchange water (water) circulating in the hot water circulation pipe 420 exchange with each other. Since the hot water condenser 412 serves as a condenser, the hot hot water refrigerant is cooled and condensed, and the low temperature exchange water receives heat to become a high temperature.

The hot water coolant having a low temperature while passing through the hot water condenser 412 flows through the hot water liquid pipe 422 ', and notifies the hot water expansion valve 426. While passing through the hot water expansion valve 426, the hot water refrigerant is decompressed and introduced into the hot water vaporizer 410.

Hot water refrigerant flowing through the hot water supply pipe 422 through this process is to complete one cycle, the hot water tank 430 by the hot water heat pump 400 is to be made of hot water .

The scope of the present invention is not limited to the above-described embodiments, and many other modifications based on the present invention will be possible to those skilled in the art within the scope of the present invention.

As described above, in the hot water supply device for an air conditioner using geothermal heat according to the present invention, the hot water heat pump is configured to be independently operable. That is, the hot water heat pump exchanges heat with an underground heat exchanger using underground heat, and is configured to generate hot water in a hot water tank installed connected to the hot water heat pump.

Therefore, since hot water is generated using underground heat, the cost of hot water supply is reduced. That is, there is an advantage that can be used to quickly generate hot water at a low cost.

Claims (6)

A plurality of indoor units that match the air in the indoor space, an outdoor heat exchanger communicating with the indoor unit and a plurality of pipes and a compressor for compressing refrigerant, and a plurality of outdoor units connected to the outdoor heat exchanger of the outdoor unit In the geothermal air conditioner including a underground heat exchanger is buried underground to heat exchange between the heat of the underground and the circulation medium circulating inside, A hot water supply pump connected to the outdoor unit and the underground heat exchanger and including a hot water evaporator and a hot water condenser to exchange heat with the circulation medium; A hot water tank installed in connection with the hot water condenser, the water being heated and stored; The hot water heat pump, A hot water evaporator that exchanges heat with the first circulation medium passing through the underground heat exchanger; A hot water condenser condensed with a second circulation medium to be stored in the hot water tank; A first circulation pipe connecting the underground heat exchanger and the hot water evaporator to guide the first circulation medium; And The hot water supply device of the air conditioner using the geothermal heat comprises a second circulation pipe for connecting the hot water condenser and the hot water tank, and guides a second circulation medium. The method of claim 1, The hot water heat pump, Hot water compressor for compressing the refrigerant passing through the hot water evaporator; And And a hot water expander for expanding the refrigerant passing through the hot water condenser. The hot water supply device for an air conditioner using geothermal heat, characterized in that both the refrigerant of the hot water condenser and hot water evaporator heat exchange with water so that continuous hot water can be performed without the need for defrost operation. The method of claim 1, The hot water supply heat pump, the hot water supply device of the air conditioner using geothermal heat, characterized in that the indoor unit is selectively operated only when performing the indoor cooling. The method of claim 1, The hot water supply heat pump is a hot water supply device of the air conditioner using geothermal heat characterized in that the operation when the temperature of the circulating medium is higher than the reference temperature during indoor cooling. delete The method of claim 2, The hot water compressor, Hot water constant speed compressor to run constant speed and It includes a hot water inverter compressor that is a variable speed heat pump (Variable Speed Heat Pump), The hot water supply constant speed compressor is additionally operated when the load capacity is increased and can not afford the load only by the hot water supply inverter compressor.

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