KR101844861B1 - Method for searching pipes in the air conditioner - Google Patents

Method for searching pipes in the air conditioner Download PDF

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Publication number
KR101844861B1
KR101844861B1 KR1020160010598A KR20160010598A KR101844861B1 KR 101844861 B1 KR101844861 B1 KR 101844861B1 KR 1020160010598 A KR1020160010598 A KR 1020160010598A KR 20160010598 A KR20160010598 A KR 20160010598A KR 101844861 B1 KR101844861 B1 KR 101844861B1
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KR
South Korea
Prior art keywords
indoor
unit
heating
cooling
outdoor unit
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KR1020160010598A
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Korean (ko)
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KR20170090118A (en
Inventor
정재화
윤필현
송치우
김각중
Original Assignee
엘지전자 주식회사
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Priority to KR1020160010598A priority Critical patent/KR101844861B1/en
Publication of KR20170090118A publication Critical patent/KR20170090118A/en
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Publication of KR101844861B1 publication Critical patent/KR101844861B1/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/89—Arrangement or mounting of control or safety devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
    • F24F1/26—Refrigerant piping
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B49/00—Arrangement or mounting of control or safety devices
    • F25B49/005—Arrangement or mounting of control or safety devices of safety devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2221/00—Details or features not otherwise provided for
    • F24F2221/32—Details or features not otherwise provided for preventing human errors during the installation, use or maintenance, e.g. goofy proof

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Air Conditioning Control Device (AREA)
  • Fuzzy Systems (AREA)
  • Mathematical Physics (AREA)
  • Signal Processing (AREA)

Abstract

The present invention relates to a method of searching for a piping of an air conditioner capable of searching for an indoor air-only indoor unit and an indoor air-only indoor unit during installation of an air conditioner. A method for searching a pipe of an air conditioner according to an embodiment of the present invention is a method for searching a pipe of an air conditioner including an outdoor unit, a distributor connected to the outdoor unit, and a plurality of indoor units connected to the outdoor unit or the distributor Opening all of the plurality of high-pressure valves included in the distributor and opening all of the plurality of indoor expansion valves included in the indoor unit; Searching for a cooling dedicated indoor unit among the plurality of indoor units based on a temperature value of a pipe of the plurality of indoor units; Closing all of the plurality of high-pressure valves included in the distributor; And searching for a heating-dedicated indoor unit among the plurality of indoor units based on temperature values of the plurality of indoor units.

Description

[0001] The present invention relates to an air conditioner,

The present invention relates to a method of searching for a pipe in an air conditioner, and more particularly, to a method of searching for a pipe in an air conditioner capable of searching for an indoor air conditioner dedicated for cooling and an indoor air conditioner for heating only during installation of the air conditioner.

Generally, the air conditioner circulates the refrigerant to cool and heat the indoor space. The air conditioner is divided into a single type air conditioner and a multi air conditioner according to the number of indoor units connected. In the single type air conditioner, one indoor unit is connected to the outdoor unit. In the multi-type air conditioner, a plurality of indoor units are connected to the outdoor unit.

The multi-type air conditioner is divided into a switching type air conditioner and a simultaneous type air conditioner according to a refrigerant flow method. The switching type air conditioner operates all the indoor units in the cooling mode or in the heating mode. The simultaneous air conditioner operates some of the indoor units in the cooling mode and some of the indoor units in the heating mode simultaneously.

The synchronous type air conditioner is provided with a distributor for distributing the refrigerant to a plurality of indoor units. The distributor distributes high-pressure refrigerant and low-pressure refrigerant to each indoor unit so that each indoor unit can operate in the cooling mode or the heating mode. A plurality of distributors may be arranged in the case of a large number of indoor units in a synchronous type air conditioner. At this time, a plurality of valves are arranged in each distributor, piping is connected to each valve, and indoor units are connected to each piping.

In addition, the simultaneous-type air conditioner is provided with a cooling-dedicated indoor unit that is operated only in the cooling mode and a heating-dedicated indoor unit that operates only in the heating mode. The indoor air conditioner and the indoor air conditioner are connected directly to the outdoor unit, not to the distributor.

The above-described air conditioner is installed in a building and then commissioned before normal operation. A pipeline searching operation is performed to search which piping is connected to each indoor unit during the trial operation of the air conditioner. It is necessary to search for indoor air-only indoor unit and indoor air-only indoor unit during the piping search by the pipeline search operation.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a method of searching for a piping of an air conditioner capable of searching for an indoor air-only indoor unit and an indoor air-only indoor unit during installation of the air conditioner.

The problems of the present invention are not limited to the above-mentioned problems, and other problems not mentioned can be clearly understood by those skilled in the art from the following description.

According to an aspect of the present invention, there is provided a method for searching for a pipe in an air conditioner, including: an outdoor unit; a distributor connected to the outdoor unit; and a plurality of indoor units connected to the outdoor unit or the distributor, The method comprising: opening all the plurality of high-pressure valves included in the distributor and opening all the plurality of indoor expansion valves included in the indoor unit; Searching for a cooling dedicated indoor unit among the plurality of indoor units based on a temperature value of a pipe of the plurality of indoor units; Closing all of the plurality of high-pressure valves included in the distributor; And searching for a heating-dedicated indoor unit among the plurality of indoor units based on temperature values of the plurality of indoor units.

According to another aspect of the present invention, there is provided a method of searching for a pipe in an air conditioner, including: an outdoor unit; a distributor connected to the outdoor unit; a plurality of cooling and heating indoor units connected to the distributor; A method of searching for a piping of an air conditioner including an indoor air conditioner dedicated to cooling and an indoor air conditioner dedicated to heating connected to the outdoor unit, the method comprising: supplying high-pressure refrigerant to the plurality of air conditioner indoor units and the air conditioner- A step of searching for the cooling-dedicated indoor unit by supplying refrigerant; And searching for the heating-dedicated indoor unit by supplying high-pressure refrigerant to the heating-dedicated indoor unit without supplying the refrigerant to the plurality of cooling / heating indoor units and the cooling-dedicated indoor unit.

The details of other embodiments are included in the detailed description and drawings.

According to the piping search method of an air conditioner of the present invention, one or more of the following effects can be obtained.

First, there is an advantage that the indoor expansion valve and the distributor high pressure valve of the indoor unit can be controlled to find out the indoor unit for cooling only and the indoor unit dedicated for heating quickly and accurately.

Secondly, there is an advantage that the outdoor unit can be operated properly and the indoor unit for cooling only and the indoor unit for heating can be found quickly and accurately in a stable cycle.

Third, there is an advantage that the search for the indoor air conditioner dedicated to the cooling, the search for the indoor air conditioner dedicated to the heating, and the search for the indoor air conditioner can be performed rapidly.

The effects of the present invention are not limited to the effects mentioned above, and other effects not mentioned can be clearly understood by those skilled in the art from the description of the claims.

1 is a block diagram schematically illustrating an air conditioner according to an embodiment of the present invention.
2 is a flowchart illustrating a method of searching for a pipe of an air conditioner according to an embodiment of the present invention.
FIG. 3 is a diagram illustrating searching for a cooling-dedicated indoor unit in a method of searching for a pipe in an air conditioner according to an embodiment of the present invention.
FIG. 4 is a diagram illustrating searching for a heating-dedicated indoor unit in a method of searching for a pipe in an air conditioner according to an embodiment of the present invention.
5 is a diagram illustrating a method for searching for a cooling / heating indoor unit in a method of searching for a pipe in an air conditioner according to an embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention and the manner of achieving them will become apparent with reference to the embodiments described in detail below with reference to the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. To fully disclose the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout the specification.

Hereinafter, the present invention will be described with reference to the drawings for explaining a piping search method of an air conditioner according to embodiments of the present invention.

1 is a block diagram schematically illustrating an air conditioner according to an embodiment of the present invention.

An air conditioner according to an embodiment of the present invention includes an outdoor unit 1 for compressing a refrigerant and exchanging heat with outdoor air, a plurality of distributors 10 and 20 connected to the outdoor unit 1, a plurality of distributors And a plurality of indoor units 100, 200, 310, and 320 connected to the outdoor unit 1.

The outdoor unit (1) is installed outdoors, compresses the refrigerant, and exchanges the refrigerant with the outdoor air. The outdoor unit 1 includes a compressor for compressing the refrigerant, an outdoor heat exchanger for exchanging the refrigerant with the outdoor air, an outdoor expansion valve for expanding the refrigerant, and an outdoor expansion valve for switching the refrigerant flow path to guide the refrigerant compressed in the compressor to the outdoor heat exchanger A switching unit for guiding the refrigerant evaporated in the outdoor heat exchanger to the compressor, and a control unit (1a) for controlling the operation of the air conditioner.

The outdoor unit (1) operates as a cooling body or a heating body in accordance with the operation of the switching unit. The main cooling operation is the operation in which the refrigerant is condensed in the outdoor heat exchanger, and the heating operation is the operation in which the refrigerant is evaporated in the outdoor heat exchanger. The cooling main body operation and the heating main body operation are changed by the switching portion of the outdoor unit (1). The switching unit of the outdoor unit 1 guides the refrigerant compressed in the compressor during the cooling main body operation to the outdoor heat exchanger and guides the refrigerant evaporated in the outdoor heat exchanger to the compressor during the heating main body operation.

Each of the plurality of indoor units 100, 200, 310, and 320 is disposed in an indoor space to heat-exchange the refrigerant with indoor air to cool or heat the indoor space. Each of the plurality of indoor units includes an indoor heat exchanger for exchanging the refrigerant with the room air and an indoor expansion valve (105, 205, 315, 325) for expanding or bypassing the refrigerant.

Is connected to the control unit 1a of the outdoor unit 1 of the plurality of indoor expansion valves 105, 205, 315 and 325 by wire or wireless communication and is opened or closed under the control of the control unit 1a of the outdoor unit 1, do.

Each of the plurality of indoor units 100, 200, 310, and 320 includes sensing units 100a, 200a, 310a, and 320a. The plurality of sensing units 100a, 200a, 310a, and 320a are provided in the plurality of indoor units 100, 200, 310, and 320, respectively. The sensing units 100a, 200a, 310a, and 320a include temperature sensors and / or pressure sensors. In the present embodiment, the sensing units 100a, 200a, 310a, Sensor.

The plurality of sensing units 100a, 200a, 310a and 320a are connected to the control unit 1a of the outdoor unit 1 by wire or wireless communication and transmit the measured values to the control unit 1a of the outdoor unit 1. In the present embodiment, the plurality of sensing units 100a, 200a, 310a, and 320a transmit the measured temperature value of the pipe to the control unit 1a of the outdoor unit 1 through wired or wireless communication. The control unit 1a of the outdoor unit 1 stores which one of the plurality of indoor units 100, 200, 310, and 320 the plurality of the sensing units 100a, 200a, 310a, and 320a are disposed.

The plurality of indoor units 100, 200, 310, and 320 are connected to the outdoor unit 1 to directly communicate with the outdoor unit 1, And a plurality of cooling and heating indoor units 310 and 320 connected to the plurality of distributors 10 and 20 and operated in a cooling mode or a heating mode.

The indoor expansion valve (105) of the indoor air conditioner (100) is controlled in opening degree to expand the refrigerant, and the indoor heat exchanger evaporates the refrigerant to cool the indoor space. The indoor air conditioner 100 is connected to the outdoor unit 1 through a cooling connection pipe. The cooling connection pipe for connecting the cooling exclusive indoor unit 100 and the outdoor unit 1 is constituted by a plurality of pipes and guides the refrigerant condensed in the outdoor unit 1 or the cooling and heating indoor units 310 and 320 to the cooling exclusive indoor unit 100 , And guides the refrigerant evaporated in the indoor unit (100) for cooling only to the outdoor unit (1). The sensing unit 100a of the indoor unit 100 for cooling only measures the outlet pipe temperature of the indoor heat exchanger of the indoor unit 100 for cooling only and transmits the temperature value of the measured pipe to the control unit 1a of the outdoor unit 1.

The indoor expansion valve (205) of the indoor heat exchanger (200) is completely opened to bypass the refrigerant, and the indoor heat exchanger condenses the refrigerant to heat the indoor space. The heating-dedicated indoor unit 200 is connected to the outdoor unit 1 through a heating connection pipe. The heating connection pipe connecting the heating-dedicated indoor unit 200 and the outdoor unit 1 is constituted by a plurality of pipes, and guides the high-pressure refrigerant compressed by the compressor of the outdoor unit 1 to the heating-dedicated indoor unit 200, And guides the refrigerant condensed in the outdoor unit (200) to the outdoor unit (1). The sensing unit 200a of the heating-dedicated indoor unit 200 measures the temperature of the outlet pipe of the indoor heat exchanger of the heating-dedicated indoor unit 200 and transmits the temperature value of the measured pipe to the control unit 1a of the outdoor unit 1.

The cooling and heating indoor units 310 and 320 are operated in a cooling mode or a heating mode. In the cooling mode, the indoor expansion valves (315, 325) of the indoor / outdoor heating and cooling indoor units (310, 320) are regulated to expand the refrigerant, and the indoor heat exchanger evaporates the refrigerant to cool the indoor space. In the heating mode, the indoor expansion valves 315 and 325 of the air conditioner indoor units 310 and 320 are completely opened to bypass the refrigerant, and the indoor heat exchanger condenses the refrigerant to heat the indoor space. The sensing units 310a and 320a of the heating and cooling indoor units 310 and 320 measure the outlet pipe temperature of the indoor heat exchangers of the cooling and heating indoor units 310 and 320 and measure the temperature value of the pipe measured by the control unit 1a of the outdoor unit 1. [ Lt; / RTI >

The plurality of cooling and heating indoor units (310, 320) are connected to the plurality of distributors (10, 20) by a plurality of distributor connecting pipes. The distributor connecting piping connecting the cooling and heating indoor units 310 and 320 and the distributors 10 and 20 is constituted by a plurality of piping and is connected to the outdoor unit 1 through the high- The indoor units 310 and 320 and the refrigerant distributed in the distributors 10 and 20 are condensed in the outdoor unit 1 or the cooling and heating indoor units 310 and 320 to guide the refrigerant distributed to the indoor units 310 and 320, , 320) to the distributors (10, 20).

The plurality of cooling and heating indoor units 310 and 320 may be divided into a plurality of groups and connected to the plurality of distributors 10 and 20, respectively. In the present embodiment, the plurality of cooling and heating indoor units 310 and 320 include a plurality of first cooling and heating indoor units 310 and a plurality of second cooling and heating indoor units 320. The plurality of first cooling and heating indoor units 310 are connected to the first distributor 10 and the plurality of second cooling and heating indoor units 320 are connected to the second distributor 20.

The distributors 10 and 20 supply the refrigerant condensed in the outdoor unit 1 or the heating and cooling indoor units 310 and 320 operating in the heating mode to the heating and cooling indoor units 310 and 320 operating in the cooling mode, And supplies the refrigerant compressed in the outdoor unit (1) to the cooling / heating indoor units (310, 320).

A plurality of distributors 10 and 20 may be provided and a plurality of distributors 10 and 20 may include a first distributor 10 and a second distributor 20 in this embodiment.

A plurality of distributors (10, 20) are connected to the outdoor unit (1). Each of the plurality of distributors 10 and 20 includes a high pressure pipe through which the refrigerant compressed in the outdoor unit 1 flows and a liquid pipe through which the refrigerant condensed in the outdoor unit 1 or the cooling and heating indoor units 310 and 320 flows, ) Or refrigerant evaporated in the cooling / heating indoor units (310, 320) flows to the outdoor unit (1).

Each of the plurality of distributors (10, 20) includes a plurality of high-pressure valves (10a, 20a). The plurality of high pressure valves 10a and 20a are disposed in the respective distributors 10 and 20 in correspondence with the plurality of cooling and heating indoor units 310 and 320 connected to the respective distributors 10 and 20. In this embodiment, a plurality of first high-pressure valves 10a are disposed in the first distributor 10, and a plurality of second high-pressure valves 20a are disposed in the second distributor 20.

Each of the plurality of high-pressure valves 10a, 20a is connected to each corresponding distributor connecting pipe. Each of the plurality of high-pressure valves 10a and 20a is compressed by the outdoor unit 1 at the time of opening and supplies the high-pressure refrigerant distributed by the distributors 10 and 20 to the corresponding cooling / heating indoor units 310 and 320 through the distributor connection pipe. The plurality of first high pressure valves 10a supply the high pressure refrigerant to the plurality of first cooling and heating indoor units 310 and the plurality of second high pressure valves 20a supply the plurality of second cooling and heating indoor units 320 And the high-pressure refrigerant is supplied.

Each of the plurality of distributors (10, 20) includes a plurality of low-pressure valves. Each of the plurality of low-pressure valves is condensed in the outdoor unit 1 or the cooling / heating indoor units 310 and 320 at the time of opening and supplies the refrigerant distributed by the distributors 10 and 20 to the corresponding cooling / heating indoor units 310 and 320 through the distributor connection pipe .

A plurality of high-pressure valves (10a, 20a) and a plurality of low-pressure valves are connected to a plurality of distributor connecting pipes respectively in pairs. When the high-pressure valves 10a and 20a are opened, the cooling and heating indoor units 310 and 320 connected to the distributor connection pipe are operated in the heating mode. When the low-pressure valve is opened, the cooling and heating indoor units 310 and 320 connected to the distributor connection pipe, Mode.

In the installation of the air conditioner, the operator extends a plurality of distributor connecting pipes from each of the plurality of distributors 10 and 20, places them in the respective indoor spaces, and connects the air conditioner indoor units 310 and 320 to the respective distributor connecting pipes do. In addition, the operator extends the heating connection pipe and the cooling connection pipe from the outdoor unit 1 and arranges them in the indoor space, connects the heating-dedicated indoor unit 200 to the heating connection pipe, connects the cooling- do.

The functions of the cooling indoor unit 100, the heating indoor unit 200, and the cooling and heating indoor units 310 and 320 are the same as those of the cooling indoor unit 310 and the indoor unit 320. That is, In addition, it is difficult to distinguish the exterior connection between the cooling connection pipe, the heating connection pipe and the distributor connection pipe, and it is difficult to determine what is connected to the building when installed in the building.

Accordingly, the worker can be sure that before the normal operation of the air conditioner, the indoor units 100, 200, 310 and 320 are connected to the connecting pipes, and that any of the indoor units 100, 200, 310 and 320 is connected to the outdoor unit 1 It is determined whether the indoor unit 100 is the dedicated indoor unit 100 or the indoor unit 200 dedicated to the heating and that the indoor units 100, 200, 310 and 320 are connected to the distributors 10 and 20, Perform the operation.

The control unit 1a of the outdoor unit 1 operates the outdoor unit 1 as a cooling body or a heating body and operates a plurality of indoor expansion valves 105, 205, 315 and 325 and a plurality of high pressure valves 10a And 20a are opened to search the cooling dedicated indoor unit 100 and the heating dedicated indoor unit 200 by the temperature values of the pipes measured by the plurality of sensing units 100a, 200a, 310a and 320a.

FIG. 2 is a flowchart illustrating a method of searching for a pipe of an air conditioner according to an exemplary embodiment of the present invention. FIG. 3 is a flow chart illustrating a method of searching for a dedicated air conditioner in a method of searching for a pipe in an air conditioner according to an exemplary embodiment of the present invention. FIG. 4 is a diagram illustrating searching for a dedicated heating-purpose indoor unit in the method of searching for a pipe in the air conditioner according to the embodiment of the present invention, FIG. 5 is a view for explaining the piping search of the air conditioner according to an embodiment of the present invention, Fig. 2 is a diagram showing how an air-conditioning indoor unit is searched in the method of Fig.

The control unit 1a of the outdoor unit 1 opens the indoor expansion valves 105, 205, 315 and 325 of all the indoor units 100, 200, 310 and 320, The high-pressure valves 10a and 20a are opened (S210). 3, the control unit 1a of the outdoor unit 1 opens all of the indoor expansion valves 105, 205, 315, and 325 so that the refrigerant is supplied to all the indoor units 100, 200, 310, do. 3, the control unit 1a of the outdoor unit 1 opens all of the plurality of high-pressure valves 10a and 20a so that the plurality of cooling / heating indoor units 310 and 320 operate in the heating mode.

The control unit 1a of the outdoor unit 1 operates the outdoor unit 1 as a heating main body so that the outdoor unit 1 evaporates the refrigerant (S220). The control section (1a) of the outdoor unit (1) controls the switching section so that the switching section guides the refrigerant evaporated in the outdoor heat exchanger to the compressor, and operates the compressor to compress the refrigerant. The control unit 1a of the outdoor unit 1 receives and stores temperature values of the pipe measured by the plurality of sensing units 100a, 200a, 310a, and 320a when the heating main body operation of the outdoor unit 1 is started.

When the heating main body operation is started, the high-pressure refrigerant compressed by the compressor flows to the heating-dedicated indoor unit 200 and the plurality of distributors 10, 20. The high-pressure refrigerant flowing into the plurality of distributors (10, 20) flows to the plurality of cooling and heating indoor units (310, 320). The refrigerant which has flowed into the heating-dedicated indoor unit 200 and the plurality of cooling and heating indoor units 310 and 320 is condensed and then flows to the outdoor unit 1. [ A part of the refrigerant flowing into the outdoor unit (1) is expanded in the outdoor expansion valve and evaporated in the outdoor heat exchanger. Another part of the refrigerant flowing into the outdoor unit (1) flows into the indoor unit (100) for cooling only. The refrigerant which has flowed into the cooling-dedicated indoor unit (100) is expanded and evaporated and then flows to the outdoor unit (1).

3, the control unit 1a of the outdoor unit 1 opens the outdoor unit 1 in a state where all the indoor expansion valves 105, 205, 315, and 325 and all the high-pressure valves 10a and 20a are opened, To supply the compressed high-pressure refrigerant to the plurality of cooling / heating indoor units (310, 320) and the heating-dedicated indoor unit (200), and to supply the condensed refrigerant to the indoor unit (100) for cooling only.

In this step, the control unit 1a of the outdoor unit 1 operates the outdoor unit 1 as the heating main body. The outdoor unit 1 is operated by the outdoor unit 1 as the cooling unit, Pressure refrigerant to the indoor units (310, 320) and the heating-dedicated indoor unit (200) and supply the condensed refrigerant to the indoor unit (100) for cooling only.

The control unit 1a of the outdoor unit 1 controls the indoor temperature of the indoor unit 100 for cooling only by the temperature value of the pipe measured by the plurality of sensing units 100a, 200a, 310a, and 320a of the plurality of indoor units 100, 200, (S230). The control unit 1a of the outdoor unit 1 is controlled by the plurality of sensors 100a, 200a, 310a, and 320a after a predetermined period of time has elapsed after the heating operation of the outdoor unit 1 is stabilized or the heating operation is started And receives the temperature value of the pipe.

The control unit 1a of the outdoor unit 1 judges the outdoor unit whose temperature value of the pipe among the plurality of indoor units 100, 200, 310, and 320 has dropped to be the indoor unit 100 for cooling only. The control unit 1a of the outdoor unit 1 compares the temperature values of the plurality of pipelines with the temperature values of the plurality of pipes stored at the start of the heating main body operation. The control unit 1a of the outdoor unit 1 controls the indoor unit provided with the sensing unit 100a that measures the temperature value of the pipe when the temperature value of the received pipe is lower than the preset value of the stored pipe, It is judged to be the dedicated indoor unit 100. The control unit 1a of the outdoor unit 1 judges that there is no indoor air-conditioning dedicated cooling unit 100 when there is no temperature value of the pipe which is lower than the preset value of the temperature of the stored pipe.

The control unit 1a of the outdoor unit 1 closes the indoor expansion valve 105 of the indoor unit 100 for cooling only (S240). The control unit 1a of the outdoor unit 1 closes the indoor expansion valve 105 of the indoor unit 100 for cooling only so that the refrigerant is not supplied to the indoor unit 100 dedicated for cooling. The control unit 1a of the outdoor unit 1 keeps all of the indoor expansion valves 205, 315, and 325 except for the indoor expansion valve 105 of the indoor unit 100 dedicated for cooling only in an opened state.

If it is determined that there is no indoor air-conditioning dedicated cooling system 100, this step is omitted. Also, even if the cooling-dedicated indoor unit 100 is searched according to the embodiment, this step may be omitted.

The control unit 1a of the outdoor unit 1 searches the indoor unit 100 for cooling only and closes the indoor expansion valve 105 of the indoor unit 100 for cooling only and then the outdoor unit 1 is operated for a predetermined time . In addition, when the control unit 1a of the outdoor unit 1 determines that there is no indoor unit 100 dedicated to cooling, the outdoor unit 1 is operated for a predetermined time and then the operation is terminated.

The control unit 1a of the outdoor unit 1 closes all the plurality of high-pressure valves 10a and 20a of the plurality of distributors 10 and 20 (S250). 4, the control unit 1a of the outdoor unit 1 closes all of the plurality of high-pressure valves 10a and 20a so that the refrigerant is not supplied to the plurality of cooling and heating indoor units 310 and 320. [ The control section (1a) of the outdoor unit (1) holds or closes the plurality of low-pressure valves in a closed state.

The control unit 1a of the outdoor unit 1 transfers the outdoor unit 1 to the heating main body so that the outdoor unit 1 evaporates the refrigerant (S260). The control section (1a) of the outdoor unit (1) controls the switching section so that the switching section guides the refrigerant evaporated in the outdoor heat exchanger to the compressor, and operates the compressor to compress the refrigerant. The control unit 1a of the outdoor unit 1 measures a plurality of sensors 200a, 310a, and 320a excluding the sensing unit 100a of the indoor unit 100 for cooling only when the heating operation of the outdoor unit 1 is resumed And receives and stores the temperature value of the pipe.

When the heating main body operation is started, the high-pressure refrigerant compressed in the compressor flows to the heating-dedicated indoor unit (200). The refrigerant that has flowed into the heating-dedicated indoor unit 200 is condensed and then flows to the outdoor unit 1. The refrigerant flowing into the outdoor unit (1) is expanded in the outdoor expansion valve and evaporated in the outdoor heat exchanger.

4, when the indoor expansion valve 105 of the indoor air-conditioning indoor unit 100 is closed and the indoor expansion valve 205 of the indoor air-heating indoor unit 200 is opened and all the high-pressure valves 10a and 20a are closed The control unit 1a of the outdoor unit 1 operates the outdoor unit 1 as a heating main body to supply the compressed high pressure refrigerant to the heating exclusive indoor unit 200 and supplies the refrigerant to the plurality of cooling and heating indoor units 310, The refrigerant is not supplied to the indoor unit 100.

In this step, the control unit 1a of the outdoor unit 1 operates the outdoor unit 1 as the heating main body. The outdoor unit 1 is operated by the outdoor unit 1 as the cooling unit, It is possible to supply the refrigerant compressed at high pressure to the plurality of cooling / heating indoor units (310, 320) and the indoor unit (100) for cooling only.

The control unit 1a of the outdoor unit 1 controls the temperature of the indoor heat exchanger 200 as the temperature value of the pipe measured by the plurality of sensing units 100a, 200a, 310a and 320a of the plurality of indoor units 100, 200, (S270). The control unit 1a of the outdoor unit 1 controls a plurality of indoor units other than the sensing unit 100a of the indoor unit 100 for cooling only after the heating operation of the outdoor unit 1 is stabilized or the heating operation is started, And receives temperature values of the pipe measured by the sensing units 200a, 310a, and 320a.

The control unit 1a of the outdoor unit 1 determines that the indoor unit 200 having the temperature value of the pipe among the plurality of indoor units 100, 200, 310, The control unit 1a of the outdoor unit 1 compares the temperature values of the received plurality of pipes with the temperature values of the plurality of pipes stored at the time of restarting the heating main body operation. The control unit 1a of the outdoor unit 1 controls the indoor unit provided with the sensing unit 200a that measures the temperature value of the pipe when the temperature value of the received pipe rises to be lower than a predetermined value It is judged to be the indoor unit 200. The control unit 1a of the outdoor unit 1 judges that there is no indoor air-conditioner 200 when there is no temperature value of the pipe which is lower than the preset temperature value.

The control unit 1a of the outdoor unit 1 closes the indoor expansion valve 205 of the heating-dedicated indoor unit 200 (S240). 5, the control unit 1a of the outdoor unit 1 closes the indoor expansion valve 205 of the heating-dedicated indoor unit 200 so that the refrigerant is not supplied to the indoor unit 200 for heating only. The control unit 1a of the outdoor unit 1 opens all of the indoor expansion valves 315 and 325 except for the indoor expansion valve 105 of the indoor unit 100 for cooling only and the indoor expansion valve 205 of the indoor unit 200 for heating only .

If it is determined that there is no indoor air-conditioner 200, this step is omitted. Also, even if the heating-dedicated indoor unit 200 is searched according to the embodiment, this step may be omitted.

The control unit 1a of the outdoor unit 1 starts searching for a plurality of indoor units 310 and 320 connected to the plurality of distributors 10 and 20 at step S290. 5, the control unit 1a of the outdoor unit 1 controls the outdoor unit 1 in a state in which the indoor expansion valves 105 and 205 of the indoor unit for cooling only 100 and the indoor unit for heating only 200 are closed, To search for the plurality of cooling and heating indoor units (310, 320) without supplying the refrigerant to the cooling dedicated indoor unit (100) and the heating exclusive indoor unit (200).

5, the control unit 1a of the outdoor unit 1 opens a part of the plurality of high-pressure valves 10a and 20a, and a part of the plurality of cooling and heating indoor units 310 and 320 is compressed in the compressor of the outdoor unit 1 And supplies high-pressure refrigerant. In the present embodiment, a plurality of first high-pressure valves 10a of the first distributor 10 are opened to supply high-pressure refrigerant to the plurality of first air-conditioning indoor units 310. [

The control unit 1a of the outdoor unit 1 controls the cooling and heating indoor units 310 and 320 as the temperature values of the pipes measured at the plurality of sensing units 100a, 200a, 310a and 320a of the plurality of indoor units 100, 200, ). The control unit 1a of the outdoor unit 1 determines that the indoor unit having the temperature value of the pipe among the plurality of indoor units 100, 200, 310 and 320 is increased to a plurality of the first cooling and heating indoor units 310 connected to the first distributor 10 do.

The control unit 1a of the outdoor unit 1 can sequentially open a plurality of the high pressure valves 10a and 20a to search for the plurality of the cooling and heating indoor units 310 and 320 according to the embodiment.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, It should be understood that various modifications may be made by those skilled in the art without departing from the spirit and scope of the present invention.

1: outdoor unit 1a: control unit
10: first distributor 20: second distributor
10a, 20a: high pressure valve 100: indoor air conditioner
200: Indoor unit for heating only 310: First indoor unit for heating and cooling
320: second cooling and heating indoor unit 105, 205, 315, 325: indoor expansion valve
100a, 200a, 310a, 320a:

Claims (12)

A method for searching for a piping of an air conditioner including an outdoor unit, a distributor connected to the outdoor unit, and a plurality of indoor units connected to the outdoor unit or the distributor,
Opening all of the plurality of high-pressure valves included in the distributor and opening all of the plurality of indoor expansion valves included in the indoor unit;
Searching for a cooling dedicated indoor unit among the plurality of indoor units based on a temperature value of a pipe of the plurality of indoor units;
Closing the indoor expansion valve of the searched cooling-only indoor unit;
Closing all of the plurality of high-pressure valves included in the distributor; And
And searching for a heating-only indoor unit among the plurality of indoor units based on the temperature value of the piping of the plurality of indoor units. The method according to claim 1,
Further comprising the step of opening a part of the plurality of high-pressure valves to search for the air-conditioning indoor / outdoor unit among the plurality of indoor units. The method according to claim 1,
Further comprising the step of operating the outdoor unit as a heating main body operation so that the outdoor unit evaporates the refrigerant before searching for the cooling dedicated indoor unit. The method according to claim 1,
Further comprising the step of operating the outdoor unit as a heating main body operation so that the outdoor unit evaporates the refrigerant before searching for the heating exclusive indoor unit. The method according to claim 1,
And determining that the indoor unit whose temperature value is lowered in the plurality of indoor units is the indoor unit for cooling only when searching for the cooling dedicated indoor unit. delete The method according to claim 1,
And determining the indoor unit having the temperature value of the pipe in the plurality of indoor units as the heating-dedicated indoor unit in the step of searching for the heating-dedicated indoor unit. 8. The method of claim 7,
And closing the indoor expansion valve of the heating-dedicated indoor unit. delete delete delete delete
KR1020160010598A 2016-01-28 2016-01-28 Method for searching pipes in the air conditioner KR101844861B1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20190132081A (en) * 2018-05-18 2019-11-27 엘지전자 주식회사 Air-conditioning system and pipe connection searching method of the same

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Publication number Priority date Publication date Assignee Title
KR102482403B1 (en) 2018-07-10 2022-12-29 엘지전자 주식회사 Air Conditioning system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20190132081A (en) * 2018-05-18 2019-11-27 엘지전자 주식회사 Air-conditioning system and pipe connection searching method of the same
KR102470528B1 (en) * 2018-05-18 2022-11-25 엘지전자 주식회사 Air-conditioning system and pipe connection searching method of the same

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