KR100860035B1 - Air-conditioning system and controlling method for the same - Google Patents

Air-conditioning system and controlling method for the same Download PDF

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Publication number
KR100860035B1
KR100860035B1 KR1020070006160A KR20070006160A KR100860035B1 KR 100860035 B1 KR100860035 B1 KR 100860035B1 KR 1020070006160 A KR1020070006160 A KR 1020070006160A KR 20070006160 A KR20070006160 A KR 20070006160A KR 100860035 B1 KR100860035 B1 KR 100860035B1
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KR
South Korea
Prior art keywords
unit
air conditioning
refrigerant
indoor
outdoor
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Application number
KR1020070006160A
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Korean (ko)
Inventor
양동근
양동준
이기섭
Original Assignee
엘지전자 주식회사
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Priority to KR1020070006160A priority Critical patent/KR100860035B1/en
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Publication of KR100860035B1 publication Critical patent/KR100860035B1/en

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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00Control or safety arrangements
    • F24F11/30Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00Control or safety arrangements
    • F24F11/50Control or safety arrangements characterised by user interfaces or communication
    • F24F11/54Control or safety arrangements characterised by user interfaces or communication using one central controller connected to several sub-controllers
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00Control or safety arrangements
    • F24F11/62Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00Control or safety arrangements
    • F24F11/70Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/83Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT-PUMP SYSTEMS
    • F25B2313/00Compression machines, plant, or systems with reversible cycle not otherwise provided for
    • F25B2313/023Compression machines, plant, or systems with reversible cycle not otherwise provided for using multiple indoor units
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT-PUMP SYSTEMS
    • F25B2313/00Compression machines, plant, or systems with reversible cycle not otherwise provided for
    • F25B2313/025Compression machines, plant, or systems with reversible cycle not otherwise provided for using multiple outdoor units

Abstract

An air conditioning system and a method for controlling the same are provided to save energy consumption and to improve heat efficiency by installing divided heat exchangers at one air conditioning unit and using some of them. An air conditioning system comprises at least one outdoor unit(100), at least one air conditioning unit(300), a control unit, and a plurality of divided heat exchangers(330). The air conditioning unit is connected to the outdoor unit, and cools or heats or ventilates room air. The control unit senses an identification number for each air conditioning unit and gives a new address by communicating with the air conditioning unit, and selectively or simultaneously controls the air conditioning unit on the basis of the new address. The divided heat exchangers are installed at the air conditioning unit and have their own identification numbers to be operated individually by the control unit in accordance of a load of the interior of the room.

Description

Air-conditioning system and control method for the same

1 is a configuration diagram schematically showing the configuration of an embodiment of an air conditioning system according to the present invention.

Figure 2 is a piping configuration when the air conditioning system according to the present invention the heating main operation.

Figure 3 is a piping configuration when the air conditioning system according to the present invention the cooling main operation

4 is a block diagram showing a configuration for controlling an air conditioning system according to the present invention.

5 is a flowchart of a control method of an air conditioning system according to the present invention;

Figure 6 is a block diagram showing another embodiment of the air conditioning system according to the present invention.

<Description of the reference numerals for the main parts of the drawings>

100: outdoor unit 200: indoor unit

300: air conditioning unit 310: first blowing fan

320: second blowing fan 330: air conditioning unit heat exchanger

400: refrigerant distribution device 500: communication control device

The present invention relates to an air conditioning system and a control method thereof, and more particularly, to an air conditioning system and a control method thereof capable of efficiently operating the system.

In general, an air handling unit (AHU) is an apparatus for supplying outdoor air to an indoor room and exhausting or circulating the indoor air to perform air conditioning of an indoor space. The air conditioning unit heats or cools air by using a cooling source or a heating source, and blows air through a duct to a required air conditioning space.

The cold source and the heat source is a combination of cold and hot water coil, when cooling the cold water of the freezer to the coil, when heating the steam or hot water of the boiler is also used, but recently used a heat exchanger to form a cooling cycle It is a trend.

In addition, the air conditioning unit is equipped with air cleaning using a filtration function, humidification according to the indoor condition, and a humidification function, and serve to make the indoor space a comfortable environment. That is, the air conditioning unit is configured to purify, cool, dampen, heat, and humidify the air supplied to the room. The air changed according to the state of the indoor space is blown to each room by a blower.

The air used for the air conditioning is returned to the air conditioning unit, mixed with a part of the outside air for ventilation, and used again by cooling / heating.

However, the above-described conventional air conditioning system has the following problems.

First, since a conventional air conditioner operates all of the spaces to be air-conditioned or all of the spaces to be heated, there is a problem in that each indoor space can not be cooled or ventilated to correspond to the load of the indoor space.

Second, the conventional air conditioner is a communication in a batch in the process of connecting a plurality of indoor units with the outdoor unit is not possible to individually communicate communication has a problem that can not operate the indoor unit to meet the load of each indoor space.

In order to solve the above problems, it is an object of the present invention to provide an air conditioning system that can control an indoor unit or an air conditioning unit according to the required load of each separated indoor space.

Another object of the present invention is to provide an air conditioning system and a method of controlling the same, which can efficiently communicate the connection between an outdoor unit, an indoor unit, and an air conditioning unit.

In order to achieve the object as described above, the present invention is connected to one or more outdoor units, the outdoor unit, one or more air conditioning units for cooling or heating the indoor space, through the communication with the air conditioning unit, the air conditioning unit Recognizing each unique number for and give a new address, and provides an air conditioning system including a control device for selectively or simultaneously controlling the air conditioning unit according to the address.

The air conditioning system may further include one or more indoor units connected to the outdoor unit for cooling or heating the indoor space simultaneously or selectively with the air conditioning unit.

The air conditioning system may further include a load sensor for detecting the load of the indoor space to control the air conditioning unit and the indoor unit according to the load of the indoor space.

In addition, the air conditioning system is controlled by the control device, and may further include a refrigerant distribution device for controlling the refrigerant flowing on the outdoor unit, air conditioning unit, the indoor unit.

The control device recognizes the unique number of the indoor unit, and can give a new address for the indoor unit to control the air conditioning unit and the indoor unit.

The air conditioning unit may include a plurality of split heat exchangers each having a unique number so that the air conditioning unit may be individually operated by the control apparatus according to the load of the corresponding indoor space.

According to another embodiment of the present invention, the present invention is a recognition step of recognizing the unique number for the air conditioning unit for heating or cooling the room space, the first address for setting a new address for the unique number of the recognized air conditioning unit It provides a control method of an air conditioning system including a setting step and an operation step of selectively or simultaneously operating the air conditioning unit according to the address.

The control method of the air conditioning system may further include a second address setting step of recognizing a unique number for an indoor unit which is simultaneously or selectively operated with the air conditioning unit and setting a new address for the unique number of the indoor unit. Can be.

The control method of the air conditioning system may further include a load sensing step of sensing a load of the indoor space to control the air conditioning unit and the indoor unit.

The operation step may include individually driving a plurality of split heat exchangers installed in one air conditioning unit according to the load of the corresponding indoor space.

Hereinafter, exemplary embodiments of an air conditioning system and a control method thereof according to the present invention will be described with reference to the accompanying drawings.

1, a configuration of an embodiment of an air conditioning system according to the present invention will be described.

The air conditioning system is connected to at least one outdoor unit 100, the outdoor unit 100, at least one air conditioning unit 300 for cooling or heating an indoor space or the communication unit 300 through the communication with the air conditioning unit 300 And a control device for recognizing each unique number for the air conditioning unit 300, giving a new address, and selectively or simultaneously controlling the air conditioning unit 300 according to the address.

The air conditioning system further includes an indoor unit 200 connected to the outdoor unit 100 and individually controlled from the air conditioning unit 300. In addition, the control device controls the flow of the refrigerant, as well as communication between the outdoor unit, indoor unit, air conditioning unit.

The indoor unit 200 and the air conditioning unit 300 may be installed in the same indoor space, or may be installed in separate compartments of the indoor space. Hereinafter, only the case where the indoor unit 200 and the air conditioning unit 300 are individually installed in each indoor space will be described.

In addition, the air conditioning system includes a refrigerant distribution device 400 for controlling the refrigerant flowing on the air conditioning unit 300, the indoor unit 200 and the outdoor unit 100. Specifically, one end of the refrigerant distribution device 400 is connected to the outdoor unit 100, the other end is connected to the indoor unit 200 or the air conditioning unit 300. Details of the indoor unit, the outdoor unit and the refrigerant distribution device will be described later with reference to FIGS. 2 and 3.

On the other hand, the air conditioning unit 300 is a first blowing fan 310 for discharging the room air (RA: Room Air) to the outside, and a second blowing fan 320 for supplying air introduced from the outside into the indoor space And an air conditioning unit heat exchanger 330 for heating or cooling the air supplied to the indoor space.

In addition, the air conditioning unit 300 may further include a filtration device 327 for purifying Supplied Air (SA) supplied to the indoor space, and a humidity control device 329 for humidifying or humidifying the air. Can be.

In addition, one side of the air conditioning unit 300 is provided with an outdoor air inlet 323 for sucking outdoor air (O.A .: Outdoor Air) into the air conditioning unit 300. In addition, an indoor air inlet 311 for discharging the indoor air RA to the outside, an exhaust port 313 for discharging the indoor air to the outside, and a blower 321 for supplying air to the room are provided together. .

The outdoor air intake port 323, the indoor air intake port 311, the exhaust port 313, and the blower port 321 are respectively connected to a duct (not shown) forming a flow path through which air can travel, and the duct is indoor or outdoor. It is provided to communicate with. Thereby, air is sucked in from outdoors or indoors, and is discharged again to outdoors or indoors.

In addition, the air conditioning unit 300 is connected to the outdoor unit 100 to form a cooling cycle, the air conditioning unit heat exchanger 330 for discharging the heat (S.A.) to be supplied to the room is installed.

When the air conditioning unit 300 is operated by heating, the exhaust (E.A .: Exhausted Air) is discharged at a higher temperature than the outdoor air (O.A.). In this case, the exhaust discharged to the outside and the outdoor air introduced from the outside may be configured to exchange heat with each other. For example, a heating element may be installed between the exhaust port housing 315 in which the exhaust port 313 is formed and the inlet housing 325 in which the outdoor air inlet 323 is formed.

Specifically, the heating element includes an exhaust passage connecting the outlet of the first blowing fan and the exhaust port, and a suction passage connecting the intake port of the outdoor air inlet and the second blowing fan. Here, the exhaust passage and the suction passage are installed while alternately crossing in the form of a thin layer. As a result, the exhaust air flowing on the exhaust passage and the outdoor air flowing on the suction passage exchange heat with each other.

Of course, an exhaust pipe and an extension pipe for extending the outdoor air inlet may be provided, and a total heat exchange device for heat exchange between the exhaust and outdoor air may be separately provided on the extension pipe.

In addition, the air conditioning system further includes a load sensor (not shown) for detecting the load of the indoor space in order to control the air conditioning unit 300 and the indoor unit 200 according to the load of the indoor space. . In this embodiment, a temperature sensor is used as the load detection sensor, but is not limited thereto. For example, the load detection sensor may be a pollution degree sensor that measures the pollution degree of the indoor space.

The load sensor is installed on one side of the indoor space, the data detected by the load sensor is transmitted to the control device, the control device is to coordinate the indoor space based on the data.

2 is a view illustrating a state in which a heating main unit is operated for one air conditioning unit and two indoor units, and FIG. 3 is a view illustrating a state in which a cooling main unit is operated.

1 to 3, the outdoor unit 100 is disposed on a plurality of compressors 110 for compressing a refrigerant, a plurality of outdoor heat exchangers 120 for exchanging refrigerant, and a discharge side of the compressor 110. The four-way valve 130 for switching the flow path of the refrigerant, and the accumulator 140 is connected to the suction side of the compressor 110 to provide a refrigerant in the gas state to the compressor 110, and the like.

The four-way valve 130 switches the flow direction of the refrigerant depending on whether the indoor space is to be heated or cooled. For example, when the system mainly performs the operation of heating the indoor space, that is, the heating main operation, the four-way valve 130 directly cools the refrigerant discharged from the compressor 110 without passing through the outdoor heat exchanger 120. Guide to flow to the distribution device (400).

When the heating main body operation is performed, the outdoor heat exchanger 120 serves as an evaporator, and a flow path is formed such that the refrigerant evaporated in the outdoor heat exchanger 120 flows into the compressor 110 and is compressed again. . An evaporation fan 150 is provided near the outdoor heat exchanger 120 to help vaporize the refrigerant when the outdoor heat exchanger 120 serves as an evaporator.

In addition, the four-way valve 130 guides the refrigerant discharged from the compressor 110 to the outdoor heat exchanger 120 when the system mainly performs the operation of cooling the indoor space, that is, the cooling main body operation.

When the cooling main body operation is performed, the outdoor heat exchanger 120 serves as a condenser, and the refrigerant discharged from the compressor 110 is condensed in the outdoor heat exchanger 120. As such, the flow path through which the refrigerant flows is determined by the switching of the four-way valve 130, and the operation state of the outdoor unit 100 and further, the air conditioning system is determined.

The outdoor expansion valve 150 is provided on the pipe opposite to the compressor 110 of the outdoor heat exchanger 120. An electronic expansion valve (EEV) may be used as the outdoor expansion valve 150. The electronic expansion valve is a valve for controlling the refrigerant flow rate of the evaporator by the electronic control device. In particular, the electromagnetic expansion valve is used in the case of long operating time and large load fluctuations, thereby reducing energy use.

On the other hand, the air conditioning system further includes at least one indoor unit 200 connected to the outdoor unit (100). The indoor unit 200 includes an indoor heat exchanger 211 and 221 and an indoor expansion valve 213 and 223 connected to the indoor heat exchanger 211 and 221 by a refrigerant pipe. Here, the indoor expansion valves 213 and 223 are preferably made of an electromagnetic expansion valve.

The refrigerant distribution device 400 includes a refrigerant pipe interconnecting the outdoor unit 100, the indoor unit 200, and the air conditioning unit 300, and a refrigerant installed on the refrigerant pipe to control the opening and closing of the refrigerant pipe. It includes a control valve.

Hereinafter, one outdoor unit 100, one air conditioning unit 300, two indoor units, that is, a refrigerant distribution device provided when the first indoor unit 210 and the second indoor unit 220 are operated. Explain.

In the air conditioner according to the present embodiment, a first refrigerant pipe 410 connecting the discharge end of the compressor 110 of the outdoor unit 100 to the first indoor unit 210, the second indoor unit, and the air conditioning unit 300. ) Is provided.

The first refrigerant pipe 410 is for connecting the first refrigerant branch pipe 411 and the first indoor unit 210 of the first refrigerant pipe for connecting the outdoor unit 100 with the air conditioning unit 300. The second refrigerant branch pipe 413 of the first refrigerant pipe, and the third refrigerant branch pipe 415 of the first refrigerant pipe for connecting with the second indoor unit 220.

In addition, the air conditioner includes a second refrigerant for connecting the outdoor heat exchanger 120, the outdoor expansion valve 160, the first indoor unit 210, the second indoor unit 220, and the air conditioning unit 300. The pipe 430 is installed.

The second refrigerant pipe 430 is connected to the first refrigerant branch pipe 431 and the first indoor unit 210 of the second refrigerant pipe for connecting the outdoor heat exchanger 160 to the air conditioning unit 300. A second refrigerant branch pipe 433 of the second refrigerant pipe for the purpose, and a third refrigerant branch pipe 435 of the second refrigerant pipe for connecting with the second indoor unit 220.

In addition, the air conditioner further includes a third refrigerant pipe 450 for connecting the indoor unit 200, the air conditioning unit 300, and the accumulator 140.

One side of the third refrigerant pipe 450 is connected to the accumulator 140 and then connected to the inlet end of the compressor 110 of the outdoor unit 100. In addition, the other side of the third refrigerant pipe is the first refrigerant branch pipe 451 of the third refrigerant pipe connected to the air conditioning unit 300, the second refrigerant of the third refrigerant pipe connected to the first indoor unit 210. The branch pipe 453 and the third refrigerant branch pipe 455 of the third refrigerant pipe connected to the second indoor unit 220.

Here, in the heating main operation, the refrigerant discharged from the compressor 110 by the switching of the four-way valve 130 allows the refrigerant to flow toward the indoor unit 200 and the air conditioning unit 300 without passing through the outdoor heat exchanger 120. do.

In the cooling main body operation, the refrigerant discharged from the compressor 110 by the switching of the four-way valve 130 passes through the outdoor heat exchanger 120 and then flows toward the indoor unit 200 and the air conditioning unit 300.

In addition, if there are a lot of indoor spaces to be cooled among the indoor spaces that the user wants to cooperate with, the cooling subject is operated, and if there are many indoor spaces to be heated, the heating subject is operated. Of course, whether or not the outdoor unit 100 is driven by heating or cooling main operation is whether the capacity of the units operated by heating in the indoor unit 200, the air conditioning unit 300 is large, or of the units driven by cooling It may be determined depending on whether the capacity is large. That is, whether the heating main driving or the cooling main driving will be determined according to whether the heating load is required a lot or the cooling load requires a lot.

At this time, the refrigerant control valve is a first refrigerant control valve (421, 423) for controlling the refrigerant flowing in the air conditioning unit, and a second refrigerant control valve (441, 443) for controlling the refrigerant flowing in the first indoor unit And third refrigerant control valves 461 and 463 for regulating the refrigerant flowing in the second indoor unit. On / off valves are used as the first refrigerant control valves 421 and 423, the second refrigerant control valves 441 and 443, and the third refrigerant control valves 461 and 463.

The first refrigerant control valve may include a first refrigerant control valve 421 of a first refrigerant pipe installed on a first refrigerant branch pipe 411 of the first refrigerant pipe, and a first refrigerant of a third refrigerant pipe. And a first refrigerant control valve 423 of the third refrigerant pipe installed on the branch pipe 451.

The second refrigerant control valve may include a second refrigerant control valve 441 of the first refrigerant pipe installed on the second refrigerant branch pipe 413 of the first refrigerant pipe, and a second refrigerant of the third refrigerant pipe. And a second refrigerant control valve 443 of the third refrigerant pipe installed on the branch pipe 453.

The third refrigerant control valve may include a third refrigerant control valve 461 of the first refrigerant pipe installed on the third refrigerant branch pipe 415 of the first refrigerant pipe, and a third refrigerant of the third refrigerant pipe. And a third refrigerant control valve 463 of the third refrigerant pipe installed on the branch pipe 455.

Hereinafter, the operation of the air conditioning system according to the present invention configured as described above will be described in detail.

First, when a user determines whether to heat or cool each air conditioning space and inputs it to the system, the control device determines the amount of heating and cooling loads required for the entire system and compares them.

That is, the control device compares the magnitude ratio of the capacity ratio of the indoor unit 200 and the air conditioning unit 300 to be cooled and operated with the capacity ratio of the indoor unit 200 and the air conditioning unit 300 to be heated and operated. If it is large, the heating subject operation is decided. If the cooling load is large, the cooling subject operation is decided. In addition, the compressor 110 inside the outdoor unit 100 is operated to operate the air conditioning system.

Referring to Figure 2, looks at from the case where the air conditioning system is the heating main operation.

When the air conditioning system is driven mainly by heating, the control device switches the four-way valve 130 to allow the refrigerant entering the outdoor unit 100 through the second refrigerant pipe 430 to the outdoor expansion valve 150. And a flow path to flow into the compressor 110 through the outdoor heat exchanger 120.

Here, the outdoor expansion valve 150 composed of an electromagnetic expansion valve is controlled to expand the refrigerant. The refrigerant expanded through the outdoor expansion valve 150 is evaporated while being heat-exchanged in the outdoor heat exchanger 120, and the refrigerant flows into the accumulator 140 connected to the inlet of the compressor 110 and is temporarily stored. The accumulator 140 controls the amount of the refrigerant flowing into the compressor 110 and also separates the gaseous refrigerant from the liquid phase refrigerant.

Thereafter, the refrigerant flows into the compressor 110 and is compressed and discharged. The refrigerant discharged from the compressor 110 is guided into the refrigerant distribution device 400 through the first refrigerant pipe 410.

On the other hand, the control device of the first refrigerant control valve 421 and the first refrigerant pipe of the first refrigerant pipe to flow to the space selected by the user to heat, that is, the air conditioning unit 300 and the first indoor unit 210. The second refrigerant control valve 441 is opened.

Then, the refrigerant is condensed through the air conditioning unit heat exchanger 330 and the indoor heat exchanger 211 of the first indoor unit 210 through the first refrigerant pipe 410, and the air conditioning unit 300 The first indoor unit 210 is heated. Of course, the first refrigerant control valve 423 of the third refrigerant pipe connected to the air conditioning unit 300 and the first indoor unit 210 in order to prevent the refrigerant from flowing back through the third refrigerant pipe 450. And the second refrigerant control valve 443 of the third refrigerant pipe should be closed.

The refrigerant exiting the air conditioning unit 300 and the first indoor unit 210 may include the first refrigerant branch pipe 431 of the second refrigerant pipe, the second refrigerant branch pipe 433 of the second refrigerant pipe, and the second refrigerant pipe. It flows through the refrigerant pipe 430. At this time, some of the refrigerant is introduced into the second indoor unit 220 along the third refrigerant branch pipe 435 of the second refrigerant pipe. And, the rest is recovered to the outdoor unit 100 through the second refrigerant pipe 430.

As shown in FIG. 2, the third refrigerant control valve 463 of the third refrigerant pipe connected to the second indoor unit 220 is opened, and the third refrigerant control valve 461 of the first refrigerant pipe is closed. Then, a part of the refrigerant flowing out of the first indoor unit 210 and the air conditioning unit 300 which performs the heating operation is transferred to the second indoor unit 220 which is cooled by the second refrigerant pipe 430. Flow.

Since the third refrigerant control valve 463 of the third refrigerant pipe is opened, the refrigerant exiting the second indoor unit 220 is moved to the accumulator 140 through the third refrigerant pipe 450 and then the compressor. Flows into 110.

Referring to Figure 3, looks at the case where the air conditioning system is a cooling main operation.

When the air conditioning system is operated in a cooling main body, the control device causes a part of the refrigerant discharged from the compressor 110 to be moved to the refrigerant distribution device 400 through the first refrigerant pipe 410, and the other part is outdoors. After passing through the heat exchanger, the second refrigerant pipe 430 is moved to the refrigerant distribution device.

 The refrigerant flowing toward the outdoor heat exchanger 120 condenses while passing through the outdoor heat exchanger 120. The condensed refrigerant is guided into the refrigerant distribution device 400 through the second expansion pipe 430 after passing through the outdoor expansion valve 150. At this time, the outdoor expansion valve 150 is in a deployed state.

The control device includes an air conditioning unit 300 for performing a cooling operation, a first refrigerant control valve 423 of a third refrigerant pipe connected to the first indoor unit 210, and a second refrigerant control valve of the third refrigerant pipe. 443 is opened, and the first refrigerant control valve 421 of the first refrigerant pipe and the second refrigerant control valve 441 of the first refrigerant pipe are closed.

The control device opens a third refrigerant control valve 461 of the first refrigerant pipe connected to the second indoor unit 220 performing the heating operation, and opens a third refrigerant control valve 463 of the third refrigerant pipe. ) Closes.

Then, the refrigerant flowing through the second refrigerant pipe 430 flows into the air conditioning unit 300 and the first indoor unit 210 which perform the cooling operation.

 The refrigerant flowing into the air conditioning unit 300 is guided and expanded to the air conditioning unit expansion valve 340 of the air conditioning unit 300. The expanded refrigerant absorbs the surrounding heat while evaporating from the air conditioning unit heat exchanger 330 and serves as a cold source. The evaporated refrigerant flows to the first refrigerant branch pipe 451 of the third refrigerant pipe, and is guided to the outdoor unit 100 through the third refrigerant pipe 450.

Similarly, the refrigerant flowing to the first indoor unit 210 is guided to the indoor expansion valve 213 of the first indoor unit and expanded. Since the expanded refrigerant absorbs the surrounding heat while evaporating from the indoor heat exchanger 211, the indoor heat exchanger 211 serves as a cold source. The evaporated refrigerant flows to the second refrigerant branch pipe 453 of the third refrigerant pipe, and is guided to the outdoor unit 100 through the third refrigerant pipe 450.

The refrigerant guided to the outdoor unit 100 is introduced into the compressor 110 through the accumulator 140 and compressed again.

Meanwhile, when the second indoor unit 220 is heated as shown in FIG. 3, the refrigerant flows into the second indoor unit through the third refrigerant branch pipe 415 of the first refrigerant pipe. The refrigerant is condensed while passing through the indoor heat exchanger 221 of the second indoor unit 220. Of course, in order to prevent the refrigerant from flowing back through the third refrigerant pipe 450, the third refrigerant control valve 463 of the third refrigerant pipe should be closed.

The refrigerant exiting the second indoor unit 220 performing the heating operation flows through the second refrigerant pipe 430 and flows into the air conditioning unit 300 and the first indoor unit 210 performing the cooling operation. .

Of course, the present invention is not limited to the above-described embodiment, but a plurality of outdoor units may be provided to operate a cooling main body or a heating main body.

In addition, in the state of FIG. 2, the first refrigerant control valve 421 of the first refrigerant pipe 410, the second refrigerant control valve 441 of the first refrigerant pipe, and the third refrigerant control valve of the first refrigerant pipe ( 461 is opened, the first refrigerant control valve 423 of the third refrigerant pipe 450, the second refrigerant control valve 443 of the third refrigerant pipe, and the third refrigerant control valve 463 of the third refrigerant pipe. When the door is closed, the first indoor unit, the second indoor unit and the entire air unit perform the heating operation.

On the contrary, in the state of FIG. 3, the first refrigerant control valve 421 of the first refrigerant pipe 410, the second refrigerant control valve 441 of the first refrigerant pipe, and the third refrigerant control valve of the first refrigerant pipe ( 461 is closed, the first refrigerant control valve 423 of the third refrigerant pipe 450, the second refrigerant control valve 443 of the third refrigerant pipe, and the third refrigerant control valve 463 of the third refrigerant pipe. When is opened, the first indoor unit, the second indoor unit and the entire air unit performs the cooling operation.

Referring to Figure 4, the configuration for the communication connection between the outdoor unit, the indoor unit and the air conditioning unit in the air conditioning system according to the present invention.

The control device provided in the air conditioning system according to the present invention controls the outdoor unit microcomputer 510 for controlling the general matters of the outdoor unit, the indoor unit microcomputer 560 for controlling the general matters of the indoor unit, and the general control of the air conditioning unit. An air conditioning unit microcomputer 590, and a communication line 530 for communication between the outdoor unit, outdoor unit, air conditioning unit.

In addition, the control device is an outdoor unit communication circuit unit 520 for connecting between the outdoor unit microcomputer 510 and the communication line 530, the indoor unit communication circuit unit for connecting between the indoor unit microcomputer 560 and the communication line 530. 550, and an air conditioning unit communication circuit unit 570 connecting between the air conditioning unit microcomputer and the communication line.

Here, the communication line includes both wired and wireless communication lines. If the communication line is a wireless communication line, the outdoor unit communication circuit unit, the indoor unit communication circuit unit and the air conditioning unit communication circuit unit 570 may be configured to directly communicate with each other.

The outdoor unit microcomputer 510 and the outdoor unit communication circuit unit 520 are installed in the outdoor unit 100, and the indoor unit microcomputer 560 and the indoor unit communication circuit unit 550 are installed in the indoor unit 200. The air conditioning unit microcomputer 590 and the air conditioning unit communication circuit unit 570 are installed in the air conditioning unit.

The outdoor unit microcomputer 510 includes an outdoor unit address setting unit 511 for setting addresses of a plurality of indoor units and air conditioning units, and data transmitted / received between the indoor unit and the air conditioning unit and the outdoor unit according to the specification of the outdoor unit. And an outdoor unit data converter 513 for appropriate conversion.

The outdoor unit address setting unit 511 communicates with and receives information while communicating with the outdoor unit data conversion unit 513, and the outdoor unit data conversion unit 513 communicates with the outdoor unit communication circuit unit 520. You exchange information.

In addition, the outdoor unit address setting unit 511 sets a new address for the indoor unit and the air conditioning unit to be operated based on the data transmitted and received through the outdoor unit data conversion unit.

On the other hand, the air conditioning unit 300 is provided with an air conditioning unit memory 540 for storing information about the air conditioning unit, the air conditioning unit memory 540 is unique to the air conditioning unit is stored a unique number given in the production of the air conditioning unit The number storage unit 583 and the air conditioning unit address storage unit 581 in which a new address given by the outdoor unit address setting unit 511 is stored.

In addition, the air conditioning unit microcomputer 590 organizes the data to be transmitted and received, and converts the data to meet the standard of the air conditioning unit data conversion unit 593, and the air conditioning unit in the outdoor unit address setting unit 511 The air conditioning unit address setting unit 591 transmits and sets a new address to the air conditioning unit address storage unit 581.

The air conditioning unit address setting unit 591 also reads the unique number stored in the air conditioning unit unique number storage unit 583 and transmits the unique number to the air conditioning unit data conversion unit 593.

On the other hand, the indoor unit 200 is an indoor unit that stores a new address given by the indoor unit unique number storage unit 541 and the outdoor unit address setting unit 511 stores the unique number assigned to the production of the indoor unit An indoor unit memory 580 including an address storage unit 543 is installed.

In addition, the indoor unit microcomputer 560 organizes the transmission and reception data and converts the data to conform to the standard of the indoor unit data unit 563, and the outdoor unit address setting unit 511 in the indoor unit Indoor unit for transmitting a new address assigned to the indoor unit address storage unit 543 and reading the unique number stored in the indoor unit unique number storage unit 541 and transmitting it to the indoor unit data conversion unit 563. And an address setting unit 561.

4 and 5, a control method of an air conditioning system according to the present invention will be described. Specifically, the process of setting a new address of the indoor unit and the air conditioning unit by the control device provided in the present invention will be described.

First, when power is applied to the indoor unit and the air conditioning unit to air condition the indoor space, the outdoor unit microcomputer detects the indoor unit and the air conditioning unit to which power is applied. That is, power is applied to the indoor unit and the air conditioning unit to be air-conditioned and the indoor unit and the air conditioning unit are electrically connected to the outdoor unit (S10).

At the same time, the load sensor detects the load of the indoor space to be coordinated, and transmits data on the detected load to the controller.

On the other hand, the control device reads the unique number of the operated indoor unit and the air conditioning unit and gives a new address according to the unique number to the indoor unit and the air conditioning unit. (S30, S50). Then, the controller checks whether the new address setting is completed (S70), and controls each indoor unit and the air conditioning unit according to the address of the newly assigned indoor unit and the air conditioning unit. At this time, the control device controls the indoor unit and the air conditioning unit according to the load of the indoor space based on the data detected by the load detection sensor.

Here, the process of the control device to give a new address of the indoor unit and the air conditioning unit as follows.

First, in order to set the addresses of the indoor unit and the air conditioning unit, the outdoor unit address setting unit 511 transmits an address setting start signal indicating the address setting start to the outdoor unit data conversion unit 513. Then, the outdoor unit data conversion unit 513 converts the address setting start signal according to the communication line standard, and the converted address setting start signal is indoors via the outdoor unit communication circuit unit 520 and the communication line 530. The unit communication circuit unit 550 and the air conditioning unit communication circuit unit 570 are transmitted.

The address setting start signal transmitted to the indoor unit communication circuit unit 550 and the air conditioning unit communication circuit unit 570 passes through the indoor unit data conversion unit 563 and the air conditioning unit data conversion unit 593, respectively. Each signal is converted to a standard.

The address setting start signal converted to fit the indoor unit and the air conditioning unit is transmitted to the indoor unit address setting unit 561 and the air conditioning unit address setting unit 591. Then, the indoor unit address setting unit 561 and the air conditioning unit address setting unit 591 read the unique numbers of each of the indoor unit and the air conditioning unit and transmits it to the outdoor unit address setting unit 511.

Thereafter, the outdoor unit address setting unit 511 assigns a new address to the indoor unit and the air conditioning unit according to the unique numbers of the indoor unit and the air conditioning unit. Then, the indoor unit address setting unit 561 and the air conditioning unit address setting unit 591 store the newly set address in each of the indoor unit address storage unit 543 and the air conditioning unit address storage unit 581.

Here, the step of setting a new address for the unique number of the air conditioning unit is called the first address setting step, and the step of setting a new address for the unique number of the indoor unit is called the second address setting step. The first address setting step and the second address setting step may be performed simultaneously or sequentially.

The above-described method checks whether the address setting for the air conditioning unit and the indoor unit is completed, and if the address setting is not completed, the above-described process is repeated again.

Finally, when the address setting for the air conditioning unit and the indoor unit is completed, the outdoor unit communicates with the indoor unit and the air conditioning unit with the new address, and the indoor unit and the air conditioning unit are based on the load detected by the load sensor. It is operated selectively or simultaneously.

6, another embodiment of the air conditioning system according to the present invention will be described.

Unlike the above-described exemplary embodiment, the air conditioning system according to the present embodiment includes a plurality of outdoor units and includes one air conditioning unit 2000. In addition, the air conditioning system is a refrigerant distribution device (3200) for controlling the flow of the refrigerant between the plurality of outdoor units and one air conditioning unit (2000), for controlling communication between a plurality of outdoor units and one air conditioning unit The control device 3100 may further include.

In particular, the air conditioning unit includes a plurality of split heat exchangers each having a unique number so that the air conditioning unit can be individually operated by the control device according to the load of the indoor space. Specifically, the plurality of heat exchangers, that is, the first heat exchanger 2110, the second heat exchanger 2120, the third heat exchanger 2130, and the fourth heat exchanger 2140 may be a plurality of outdoor units, that is, the first heat exchanger 2140. The outdoor unit 1100, the second outdoor unit 1200, the third outdoor unit 1300, and the fourth outdoor unit 1400 respectively correspond to each other and are individually controlled according to the load of the indoor space.

Of course, each outdoor unit may vary in capacity depending on the load of the indoor space. In addition, the plurality of divided heat exchangers and the outdoor unit may be alternately operated according to the load of the indoor space. For example, when the load of the indoor space is 100, the maximum capacity of the first heat exchanger 2110 is 100, and the maximum capacity of the second heat exchanger 2120 is 200, in order to satisfy the load of the indoor space. The first heat exchanger 2110 and the second heat exchanger 2120 may be operated alternately. Here, the second outdoor unit 1200 connected to the second heat exchanger 2120 may be an outdoor unit having a variable capacity.

In addition, some of the plurality of split heat exchangers may be used for a cooling operation, and some may be used for a heating operation. Then, there is no separate defrosting operation, which has the advantage that no heating interruption or reduction in heating capacity occurs.

The present invention is not limited to the above-described embodiments, and those skilled in the art can make modifications without departing from the spirit of the present invention, and such modifications are within the scope of the present invention.

The air conditioning system and control method thereof according to the present invention have the following effects.

First, according to the present invention, through the communication between the air conditioning unit and the outdoor unit installed in each indoor space, there is an advantage that the operating efficiency can be increased by selectively or simultaneously controlling the air conditioning unit corresponding to each indoor space. . In other words, it is possible to increase the driving efficiency by supplying as much energy as necessary to the indoor space that requires air conditioning.

Second, recognize each unique number for the indoor unit and the air conditioning unit connected to the outdoor unit and give a new address, and can control the system effectively and smoothly by being able to operate the indoor unit and the air conditioning unit separately based on the address. There is an advantage to this.

Third, there is an advantage that the refrigerant can be easily distributed by installing a refrigerant distribution device for controlling the refrigerant flowing on the outdoor unit, the air conditioning unit and the indoor unit.

Fourth, according to the present invention, by installing a plurality of heat exchangers divided into one air conditioning unit, when only a small amount of cooling and heating requirements are required, only a part of the divided heat exchangers can be used to operate effectively.

Claims (10)

  1. One or more outdoor units;
    At least one air conditioning unit connected to the outdoor unit for cooling or heating an indoor space;
    A control device for recognizing each unique number for the air conditioning unit, giving a new address, and selectively or simultaneously controlling the air conditioning unit according to the address through communication with the air conditioning unit; And
    And a plurality of split heat exchangers, each of which is provided in the air conditioning unit and each of which is assigned a number so as to be individually operated by the control apparatus according to the load of the corresponding indoor space.
  2. The method of claim 1,
    Air conditioning system further comprises one or more indoor units connected to the outdoor unit for cooling or heating the indoor space simultaneously or selectively with the air conditioning unit.
  3. The method of claim 2,
    Air conditioning system further comprises a load sensor for detecting the load of the indoor space in order to control the air conditioning unit and the indoor unit according to the load of the indoor space.
  4. The method according to claim 2 or 3,
    And a refrigerant distribution device controlled by the control device and configured to control the refrigerant flowing on the outdoor unit, the air conditioning unit, and the indoor unit.
  5. The method according to claim 2 or 3,
    The control device recognizes the unique number of the indoor unit, the air conditioning system, characterized in that to control the air conditioning unit and the indoor unit by giving a new address for the indoor unit.
  6. delete
  7. A recognition step of recognizing a unique number for an air conditioning unit for cooling or heating an indoor space;
    A first address setting step of setting a new address for the unique number of the recognized air conditioning unit; And,
    And an operation step of selectively or simultaneously operating the air conditioning unit according to the address, wherein the operation step comprises: individually operating a plurality of heat exchangers installed in one air conditioning unit according to the load of the corresponding indoor space. Control method of the system.
  8. delete
  9. delete
  10. delete
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