KR100430003B1 - Drive control method of multi airconditioner - Google Patents

Drive control method of multi airconditioner Download PDF

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Publication number
KR100430003B1
KR100430003B1 KR10-2002-0001741A KR20020001741A KR100430003B1 KR 100430003 B1 KR100430003 B1 KR 100430003B1 KR 20020001741 A KR20020001741 A KR 20020001741A KR 100430003 B1 KR100430003 B1 KR 100430003B1
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South Korea
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indoor unit
compressor
unit
final
determining whether
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KR10-2002-0001741A
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Korean (ko)
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KR20030061197A (en
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하도용
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엘지전자 주식회사
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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
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/83—Control 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
    • F24F11/84—Control 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 using valves
    • 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
    • F24F11/63—Electronic processing
    • 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
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/30—Expansion means; Dispositions thereof
    • F25B41/31—Expansion valves
    • 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
    • F25B2600/00—Control issues
    • F25B2600/25—Control of valves
    • F25B2600/2513—Expansion valves

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

Abstract

본 발명은 멀티에어컨의 운전제어방법에 관한 것으로, 실내기 오프시 실내기의 팽창장치가 닫히는 속도를 압축기의 운전주파수가 낮아지는 속도와 대응되게 제어함으로써 안전하게 실내기를 정지시킬 수 있도록 한 것이다. 이를 위하여 본 발명은 한대의 실외기에 여러대의 실내기가 접속되어 운전되는 멀티에어컨에 있어서, 실내기 운전을 판단하여, 실내기가 운전중이면 정상적으로 팽창장치를 전체 부하에 따라 제어하는 제1 과정과; 실내기가 오프되면, 해당실내기에서 실외기로 현재 정보를 전송한후, 그 실외기로부터 해당 실내기로 응답신호가 전송되었는지를 판단하는 제2 과정과; 상기 제2 과정의 판단결과, 응답신호가 전송되었으면, 압축기의 운전여부를 판단하는 제3 과정과; 상기 제3 과정의 판단결과, 압축기가 정지되었으면, 해당 실내기의 팽창변을 닫고, 압축기가 운전중이면 해당 실내기가 최종 실내기인지를 판단하는 제4 과정과; 상기 제4 과정의 판단결과, 해당 실내기가 최종 실내기가 아니면 팽창변을 닫고, 해당 실내기가 최종 실내기이면 팽창변을 유지하는 제5 과정으로 이루어진다.The present invention relates to a driving control method for a multi-air conditioner, and to control the speed at which the expansion device of the indoor unit is closed when the indoor unit is off to correspond to the speed at which the operating frequency of the compressor is lowered to safely stop the indoor unit. To this end, the present invention provides a multi-air conditioner in which a plurality of indoor units are connected to one outdoor unit and is operated. The first process of determining indoor unit operation and normally controlling the expansion device according to the total load when the indoor unit is in operation; If the indoor unit is turned off, transmitting a current information from the indoor unit to the outdoor unit, and then determining whether a response signal is transmitted from the outdoor unit to the indoor unit; A third step of determining whether to operate the compressor when a response signal is transmitted as a result of the determination of the second step; A fourth step of determining whether the indoor unit is the final indoor unit when the compressor is stopped, closing the expansion valve of the indoor unit, and determining whether the indoor unit is the final indoor unit when the compressor is in operation; As a result of the determination of the fourth process, if the indoor unit is not the final indoor unit, the expansion valve is closed, and if the indoor unit is the final indoor unit, a fifth process is maintained.

Description

멀티에어컨의 운전제어방법{DRIVE CONTROL METHOD OF MULTI AIRCONDITIONER}DRIVE CONTROL METHOD OF MULTI AIRCONDITIONER

본 발명은 멀티에어컨의 운전제어방법에 관한 것으로, 특히 실내기 오프시 실내기의 팽창장치가 닫히는 속도를 압축기의 운전주파수가 낮아지는 속도와 대응되게 제어함으로써 안전하게 실내기를 정지시킬 수 있도록 한 멀티에어컨의 운전제어방법에 관한 것이다.The present invention relates to an operation control method of a multi-air conditioner, and in particular, by controlling the speed at which the expansion device of the indoor unit is closed when the indoor unit is turned off to correspond to the speed at which the operation frequency of the compressor decreases, the operation of the multi-air conditioner can be safely stopped. It relates to a control method.

일반적으로 에어컨은, 여러개의 룸에 각각 하나씩 실내기를 설치하고, 이들의 실내기와 연결된 하나의 실외기로 구성된 멀티형과, 단순하게 실외기와 실내기만으로 이루어진 분리형과, 상기 실외기와 실내기가 함께 구성된 일체형으로 나누어진다.In general, an air conditioner is divided into a multi-type consisting of one outdoor unit installed in each of several rooms, one outdoor unit connected to these indoor units, a separate type consisting of only an outdoor unit and an indoor unit, and an integral type consisting of the outdoor unit and the indoor unit together. .

상기 멀티에어컨은, 한대의 실외기에 여러대의 실내기가 접속되어 운전되는 것으로, 냉매를 팽창시키는 팽창장치는 주로 실외기에서 설치되나 최근의 빌딩 멀티에어컨에 있어서는 실내기에 설치되는 것이 보통이다.The multi-air conditioner is operated by connecting several indoor units to one outdoor unit. An expansion device for expanding a refrigerant is mainly installed in an outdoor unit, but in a recent building multi-air conditioner, an indoor unit is usually installed.

도1은 일반적인 멀티 에어컨의 냉매싸이클을 보인도로서, 이에 도시된 바와같이 냉매를 압축하는 압축기와, 압축되어진 냉매를 응축하는 응축기와, 상기 응축기가 주위환경으로 부터 열을 잘 빼앗기도록 하는 실외팬으로 이루어진 실외기와; 냉매의 압력을 강화하는 팽창장치와, 냉매를 증발시키면서 열이 흡수되게 하는 증발기로 이루어져 각기 해당 실내로 찬공기를 토출하는 다수의 실내기로 구성된다.1 is a view illustrating a refrigerant cycle of a general multi-air conditioner. As shown in FIG. 1, a compressor for compressing a refrigerant, a condenser for condensing the compressed refrigerant, and an outdoor fan for allowing the condenser to take heat away from the environment An outdoor unit consisting of; An expansion device for reinforcing the pressure of the refrigerant and an evaporator for absorbing heat while evaporating the refrigerant, each of which comprises a plurality of indoor units for discharging cold air into the room.

이러한, 멀티 에어컨이 냉매 싸이클은, 압축기에서 압축되어진 냉매가 응축기에서 응축되어 기체 상태에서 액체 상태로 바뀌면서 열을 실외기로 방출한후, 팽창장치를 통해 압력이 떨어진다.In the multi-air conditioner refrigerant cycle, the refrigerant compressed in the compressor is condensed in the condenser and discharges heat to the outdoor unit while changing from a gas state to a liquid state, and then the pressure drops through the expansion device.

상기 증발기는,압력이 떨어진 냉매를 액체에서 기체로 증발하면서 열을 흡수하게 되고, 그 증발기의 표면이 차가워지면서 실내기의 팬에 의해 실내의 더운 공기가 증발기와 열교환하면서 냉방이 이루어진다.The evaporator absorbs heat while evaporating the refrigerant under pressure from the liquid to the gas. The surface of the evaporator cools down while the hot air of the indoor unit is cooled by heat exchange with the evaporator by the fan of the indoor unit.

만약, 임의의 실내기가 운전 정지 되는 경우, 실내기의 팽창장치가 닫히는 속도가 압축기의 운전주파수가 낮아지는 속도보다 빠르게 되면, 냉매의 순환경로가 차단되어 싸이클의 압력이 높아지고, 이로인해 전체 시스템에 손상을 주는 문제점이 있다.If any indoor unit is stopped, if the expansion speed of the indoor unit is closed faster than the operation frequency of the compressor is lowered, the circulation path of the refrigerant is blocked and the pressure of the cycle is increased, thereby damaging the whole system. There is a problem giving.

본 발명은 상기와 같은 문제점을 해결하기 위하여 안출된 것으로, 실내기 오프시 실내기의 팽창장치가 닫히는 속도를 압축기의 운전주파수가 낮아지는 속도와 대응되게 제어함으로써 안전하게 실내기를 정지시킬 수 있도록 한 멀티에어컨의 운전제어방법을 제공함에 그 목적이 있다.The present invention has been made to solve the above problems, by controlling the speed at which the expansion device of the indoor unit is closed when the indoor unit is off to correspond to the speed at which the operating frequency of the compressor lowers the safety of the multi-air conditioner The purpose is to provide an operation control method.

도1은 일반적인 멀티에어컨의 구성을 보인 블록도.1 is a block diagram showing a configuration of a general multi-air conditioner.

도2는 본 발명 멀티 에어컨의 운전제어방법에 대한 동작흐름도.Figure 2 is a flow chart for the operation control method of the present invention multi air conditioner.

상기와 같은 목적을 달성하기 위한 본 발명은, 한대의 실외기에 여러대의 실내기가 접속되어 운전되는 멀티에어컨에 있어서, 실내기 운전을 판단하여, 실내기가 운전중이면 정상적으로 팽창장치를 전체 부하에 따라 제어하는 제1 과정과; 실내기가 오프되면, 해당실내기에서 실외기로 현재 정보를 전송한후, 그 실외기로부터 해당 실내기로 응답신호가 전송되었는지를 판단하는 제2 과정과; 상기 제2 과정의 판단결과, 응답신호가 전송되었으면, 압축기의 운전여부를 판단하는 제3 과정과; 상기 제3 과정의 판단결과, 압축기가 정지되었으면, 해당 실내기의 팽창변을 닫고, 압축기가 운전중이면 해당 실내기가 최종 실내기인지를 판단하는 제4 과정과; 상기 제4 과정의 판단결과, 해당 실내기가 최종 실내기가 아니면 팽창변을 닫고, 해당 실내기가 최종 실내기이면 팽창변을 유지하는 제5 과정으로 수행함을 특징으로 한다.In order to achieve the above object, the present invention provides a multi-air conditioner in which a plurality of indoor units are connected to an outdoor unit and is operated. The indoor unit is determined to operate and normally controls the expansion device according to the total load when the indoor unit is in operation. A first process; If the indoor unit is turned off, transmitting a current information from the indoor unit to the outdoor unit, and then determining whether a response signal is transmitted from the outdoor unit to the indoor unit; A third step of determining whether to operate the compressor when a response signal is transmitted as a result of the determination of the second step; A fourth step of determining whether the indoor unit is the final indoor unit when the compressor is stopped, closing the expansion valve of the indoor unit, and determining whether the indoor unit is the final indoor unit when the compressor is in operation; As a result of the determination of the fourth process, if the indoor unit is not the final indoor unit, the expansion valve is closed, and if the indoor unit is the final indoor unit, it is performed as a fifth process of maintaining the expansion valve.

이하, 본 발명에 의한 멀티에어컨의 운전제어방법에 대한 작용 및 효과를 첨부한 도면을 참조하여 상세히 설명한다.Hereinafter, with reference to the accompanying drawings, the operation and effect of the operation control method of the multi-air conditioner according to the present invention will be described in detail.

도2는 본 발명 멀티에어컨의 운전제어방법에 대한 동작흐름도로서, 이에 도시한 바와같이 실내기 운전을 판단하여, 실내기가 운전중이면 정상적으로 팽창장치를 전체 부하에 따라 제어하는 제1 과정과; 실내기가 오프되면, 해당실내기에서 실외기로 현재 정보를 전송한후, 그 실외기로부터 해당 실내기로 응답신호가 전송되었는지를 판단하는 제2 과정과; 상기 제2 과정의 판단결과, 응답신호가 전송되었으면, 압축기의 운전여부를 판단하는 제3 과정과; 상기 제3 과정의 판단결과, 압축기가 정지되었으면, 해당 실내기의 팽창변을 닫고, 압축기가 운전중이면 해당 실내기가 최종 실내기인지를 판단하는 제4 과정과; 상기 제4 과정의 판단결과, 해당 실내기가 최종 실내기가 아니면 팽창변을 닫고, 해당 실내기가 최종 실내기이면 팽창변을 유지하는 제5 과정으로 이루어지며, 이와같은 본 발명의 동작을 설명한다.FIG. 2 is a flowchart illustrating an operation control method for a multi-air conditioner according to the present invention. As shown in FIG. 1, the operation of the indoor unit is determined, and when the indoor unit is in operation, a first process of normally controlling the expansion device according to the total load; If the indoor unit is turned off, transmitting a current information from the indoor unit to the outdoor unit, and then determining whether a response signal is transmitted from the outdoor unit to the indoor unit; A third step of determining whether to operate the compressor when a response signal is transmitted as a result of the determination of the second step; A fourth step of determining whether the indoor unit is the final indoor unit when the compressor is stopped, closing the expansion valve of the indoor unit, and determining whether the indoor unit is the final indoor unit when the compressor is in operation; As a result of the determination of the fourth process, if the indoor unit is not the final indoor unit, the expansion valve is closed, and if the indoor unit is the final indoor unit, the fifth process is performed to maintain the expansion valve, and thus the operation of the present invention will be described.

먼저, 임의의 실내기가 운전되는 경우에, 압축기에서 압축되어진 냉매가 응축기에서 응축되어 기체 상태에서 액체 상태로 바뀌면서 열을 실외기로 방출한후,해당 실내기에 연결된 팽창장치를 통해 압력이 떨어진다.First, when any indoor unit is operated, the refrigerant compressed in the compressor condenses in the condenser, releases heat to the outdoor unit as it changes from gas to liquid state, and then the pressure drops through the expansion device connected to the indoor unit.

그러면, 해당 실내기에 구비된 증발기는, 압력이 떨어진 냉매를 액체에서 기체로 증발하면서 열을 흡수하게 되고, 그 증발기의 표면이 차가워지면서 실내기의 팬에 의해 실내의 더운 공기가 증발기와 열교환하면서 냉방이 이루어진다.Then, the evaporator provided in the indoor unit absorbs heat while evaporating the refrigerant under pressure from the liquid to the gas, and the surface of the evaporator cools, while the indoor air is cooled by heat of the indoor unit by the fan of the indoor unit. Is done.

이때, 실외기는 정상적으로 팽창장치를 전체 부하에 따라 제어한다.At this time, the outdoor unit normally controls the expansion device according to the total load.

만약,임의의 실내기가 오프되면, 그 실내기의 마이컴이 현재 자신의 정보를 실외기 마이컴에 전송한후, 그 실외기로부터 해당실내기로 응답신호가 전송되었는지를 판단하는데, 응답신호를 받을 때까지 해당 실내기의 팽창장치는 현재 개도를 계속하여 유지한다.If the indoor unit is turned off, the microcomputer of the indoor unit transmits its own information to the outdoor unit microcomputer, and then determines whether a response signal is transmitted from the outdoor unit to the indoor unit until the response signal is received. The inflation device continues to maintain the current opening.

상기 판단결과, 실외기로부터 응답신호가 전송되면, 실외기의 압축기가 운전중인지를 판단하여, 압축기가 정지상태이면 해당 실내기에 연결된 팽창장치의 개도를 닫고, 압축기가 운전중이면 해당 실내기가 최종 실내기인지를 판단한다.As a result of the determination, when a response signal is transmitted from the outdoor unit, it is determined whether the compressor of the outdoor unit is in operation. If the compressor is in a stopped state, the opening degree of the expansion device connected to the indoor unit is closed, and if the compressor is in operation, whether the indoor unit is the final indoor unit. To judge.

상기 판단결과, 해당 실내기가 최종 실내기가 아니면 팽창변을 닫고, 해당 실내기가 최종 실내기이면 팽창변을 유지한후, 압축기가 꺼지고 나면 팽창변을 닫는다.As a result of the determination, if the indoor unit is not the final indoor unit, the expansion valve is closed. If the indoor unit is the final indoor unit, the expansion valve is maintained, and after the compressor is turned off, the expansion valve is closed.

상기 본 발명의 상세한 설명에서 행해진 구체적인 실시 양태 또는 실시예는 어디까지나 본 발명의 기술 내용을 명확하게 하기 위한 것으로 이러한 구체적 실시예에 한정해서 협의로 해석해서는 안되며, 본 발명의 정신과 다음에 기재된 특허 청구의 범위내에서 여러가지 변경 실시가 가능한 것이다.The specific embodiments or examples made in the detailed description of the present invention are intended to clarify the technical contents of the present invention to the extent that they should not be construed as limited to these specific embodiments and should not be construed in consultation. Various changes can be made within the scope of.

이상에서 상세히 설명한 바와같이 본 발명은, 실내기 오프시 실내기의 팽창장치가 닫히는 속도를 압축기의 운전주파수가 낮아지는 속도보다 느리게 제어함으로써 시스템의 손상없이 안전하게 실내기를 정지시키는 효과가 있다.As described in detail above, the present invention has the effect of stopping the indoor unit safely without damaging the system by controlling the closing speed of the expansion device of the indoor unit when the indoor unit is turned off slower than the speed at which the operating frequency of the compressor is lowered.

Claims (3)

한대의 실외기에 여러대의 실내기가 접속되어 운전되는 멀티에어컨에 있어서,In a multi air conditioner in which several indoor units are connected to one outdoor unit and operated, 실내기 운전을 판단하여, 실내기가 운전중이면 정상적으로 팽창장치를 전체 부하에 따라 제어하는 제1 과정과;Determining the indoor unit operation, and controlling the expansion device according to the total load if the indoor unit is in operation; 실내기가 오프되면, 해당실내기에서 실외기로 현재 정보를 전송한후, 그 실외기로부터 해당 실내기로 응답신호가 전송되었는지를 판단하는 제2 과정과;If the indoor unit is turned off, transmitting a current information from the indoor unit to the outdoor unit, and then determining whether a response signal is transmitted from the outdoor unit to the indoor unit; 상기 제2 과정의 판단결과, 응답신호가 전송되었으면, 압축기의 운전여부를 판단하는 제3 과정과;A third step of determining whether to operate the compressor when a response signal is transmitted as a result of the determination of the second step; 상기 제3 과정의 판단결과, 압축기가 정지되었으면, 해당 실내기의 팽창변을 닫고, 압축기가 운전중이면 해당 실내기가 최종 실내기인지를 판단하는 제4 과정과;A fourth step of determining whether the indoor unit is the final indoor unit when the compressor is stopped, closing the expansion valve of the indoor unit, and determining whether the indoor unit is the final indoor unit when the compressor is in operation; 상기 제4 과정의 판단결과, 해당 실내기가 최종 실내기가 아니면 팽창변을 닫고, 해당 실내기가 최종 실내기이면 팽창변을 유지하는 제5 과정으로 수행함을 특징으로 하는 멀티에어컨의 운전제어방법.As a result of the determination of the fourth process, if the indoor unit is not the final indoor unit, the expansion valve is closed, and if the indoor unit is the final indoor unit, the operation control method of the multi-air conditioner, characterized in that performed in the fifth process of maintaining the expansion valve. 제1 항에 있어서, 제3 과정은,The method of claim 1, wherein the third process comprises: 응답신호가 전송될때까지 현재 팽창변의 개도를 계속하여 유지하는 단계를 포함하는 것을 특징으로 하는 멀티에어컨의 운전제어방법.And maintaining the opening degree of the current expansion valve until a response signal is transmitted. 제1 항에 있어서, 제5 과정은,According to claim 1, The fifth process, 압축기가 정지할 때까지 팽창변의 개도를 계속 유지하다가 압축기가 정지되면 팽창변을 닫는 단계를 포함하는 것을 특징으로 하는 멀티에어컨의 운전제어방법.And maintaining the opening of the expansion valve until the compressor stops, and closing the expansion valve when the compressor is stopped.
KR10-2002-0001741A 2002-01-11 2002-01-11 Drive control method of multi airconditioner KR100430003B1 (en)

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