KR20010001013A - Defrosting method for air conditioner - Google Patents

Defrosting method for air conditioner Download PDF

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Publication number
KR20010001013A
KR20010001013A KR1019990019966A KR19990019966A KR20010001013A KR 20010001013 A KR20010001013 A KR 20010001013A KR 1019990019966 A KR1019990019966 A KR 1019990019966A KR 19990019966 A KR19990019966 A KR 19990019966A KR 20010001013 A KR20010001013 A KR 20010001013A
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KR
South Korea
Prior art keywords
temperature
heat exchanger
outdoor
defrosting operation
air conditioner
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KR1019990019966A
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Korean (ko)
Inventor
강병식
김병순
김창범
최득관
김주상
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구자홍
엘지전자 주식회사
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Priority to KR1019990019966A priority Critical patent/KR20010001013A/en
Publication of KR20010001013A publication Critical patent/KR20010001013A/en

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    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B1/00—Border constructions of openings in walls, floors, or ceilings; Frames to be rigidly mounted in such openings
    • E06B1/04—Frames for doors, windows, or the like to be fixed in openings
    • E06B1/34—Coverings, e.g. protecting against weather, for decorative purposes
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B1/00—Border constructions of openings in walls, floors, or ceilings; Frames to be rigidly mounted in such openings
    • E06B1/04—Frames for doors, windows, or the like to be fixed in openings
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B1/00—Border constructions of openings in walls, floors, or ceilings; Frames to be rigidly mounted in such openings
    • E06B1/56—Fastening frames to the border of openings or to similar contiguous frames
    • E06B1/60—Fastening frames to the border of openings or to similar contiguous frames by mechanical means, e.g. anchoring means
    • E06B1/6069—Separate spacer means acting exclusively in the plane of the opening; Shims; Wedges; Tightening of a complete frame inside a wall opening
    • E06B1/6076—Separate spacer means acting exclusively in the plane of the opening; Shims; Wedges; Tightening of a complete frame inside a wall opening of screw-type

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  • Engineering & Computer Science (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

PURPOSE: A defrost operation method is provided to achieve an improved efficiency of defrost operation by starting the defrost operation by sensing the temperature of pipe of outdoor heat exchanger and an indoor air temperature. CONSTITUTION: A method comprises a first step of judging whether a predetermined time period has lapsed during heating operation; a second step of judging whether the temperature of the pipeline of an outdoor heat exchanger is a predetermined temperature or lower; and judging whether to start defrost operation in accordance with the outdoor temperature, and starting defrost operation if the outdoor temperature is 0 Deg.C or higher, and starting defrost operation after executing heating operation if the outdoor temperature is lower than 0 Deg.C. A compressor is operated for an increased time period in accordance with the temperature of outdoor air, thus reducing the time required for defrost operation.

Description

공기조화기의 제상운전 방법 {Defrosting method for air conditioner}Defrosting method for air conditioner {Defrosting method for air conditioner}

본 발명은 공기조화기의 제상운전 방법에 관한 것으로서, 특히 실외 열교환기의 배관온도와 실외공기온도를 감지하여 제상운전을 개시함으로써 제상운전을 더욱 효율적으로 할 수 있는 공기조화기의 제상운전 방법에 관한 것이다.The present invention relates to a defrosting operation method of an air conditioner, and more particularly, to a defrosting operation method of an air conditioner that can perform defrosting operation more efficiently by initiating a defrosting operation by sensing a pipe temperature and an outdoor air temperature of an outdoor heat exchanger. It is about.

일반적으로, 공기조화기는 크게 냉방전용으로 사용되는 것과, 냉난방겸용으로 사용되는 것으로 분류할 수 있는데, 냉난방겸용으로 사용되는 공기조화기는 겨울철에 난방으로 사용되는 경우 실외의 온도가 일정온도 이하로 떨어지게 되면 실외 열교환기가 증발기로 동작하는 상태이므로 실외 열교환기와 열 교환을 하는 실외공기의 수분이 실외 열교환기의 표면에 맺힌 후 응결되어 전체 시스템이 제대로 동작할 수 없는 상태에 이르게 된다. 이때, 실외 열교환기의 표면에 응결된 서리를 제거하는 것을 제상운전이라 한다. 즉, 제상운전은 실외 열교환기에 맺힌 서리가 제거될 수 있도록 냉방사이클로 전환하여 실외 열교환기가 일정시간 응축기로 동작하게 함으로써 서리를 제거하도록 운전하는 것이다.In general, air conditioners can be classified into two types, one for cooling and one for heating and cooling. When the air conditioner used for heating and cooling is used for heating in winter, when the outdoor temperature drops below a certain temperature Since the outdoor heat exchanger operates as an evaporator, moisture in the outdoor air that exchanges heat with the outdoor heat exchanger condenses on the surface of the outdoor heat exchanger and condenses, leading to a state in which the entire system cannot operate properly. At this time, removing the frost condensation on the surface of the outdoor heat exchanger is called defrosting operation. That is, the defrosting operation is to switch to a cooling cycle so that the frost formed on the outdoor heat exchanger can be removed so that the outdoor heat exchanger operates as a condenser for a predetermined time to remove frost.

참조된 도면, 도 1은 종래기술에 의한 공기조화기의 개략적인 구성도이다.1 is a schematic configuration diagram of an air conditioner according to the prior art.

종래의 공기조화기는 도 1에 도시된 바와 같이 냉방운전시에는 증발기로 난방운전시에는 응축기로 동작하는 실내 열교환기(1)와, 냉방운전시에는 응축기로 난방운전시에는 증발기로 동작하는 실외 열교환기(3)와, 상기 실내 열교환기(1) 및 상기 실외 열교환기(3)에 각각 설치된 실내외 팬(2, 4)과, 상기 실내 열교환기(1)와 상기 실외 열교환기(3) 사이에 설치되어 이송되는 냉매가 용이하게 증발될 수 있도록 팽창시키는 팽창밸브(5)와, 증발기로 동작하는 열 교환기로부터 저온저압의 냉매를 흡입하여 고온고압의 냉매로 압축시키는 압축기(6)와, 상기 압축기(6)로부터 토출되는 고온고압의 냉매를 냉방운전시에는 상기 실외 열교환기(3)로 난방운전시에는 상기 실내 열교환기(1)로 이송되도록 절환되는 사방밸브(7)로 구성된다.As shown in FIG. 1, a conventional air conditioner includes an indoor heat exchanger 1 that operates as an evaporator during a cooling operation and a condenser during a heating operation, and an outdoor heat exchanger that operates as an evaporator during a heating operation during a cooling operation. Between the indoor heat exchanger 1 and the outdoor heat exchanger 3, the indoor and outdoor fans 2 and 4 installed in the indoor heat exchanger 1 and the outdoor heat exchanger 3, respectively. An expansion valve 5 for expanding the installed and transported refrigerant so that the refrigerant can be easily evaporated, a compressor 6 for sucking low-temperature low-pressure refrigerant from a heat exchanger operating as an evaporator and compressing the low-temperature refrigerant to a high-temperature high-pressure refrigerant; The high temperature and high pressure refrigerant discharged from (6) is composed of a four-way valve (7) switched to be transferred to the outdoor heat exchanger (3) during the cooling operation to the indoor heat exchanger (1) during the heating operation.

상기에서, 난방운전의 경우 난방운전이 일정시간 경과되고 상기 실외 열교환기(3)에 서리가 응결되는 일정온도에 도달하게 되면, 제상운전을 개시하게 되고, 제상운전 개시에 따라 상기 사방밸브(7)가 냉방운전으로 절환되며, 제상운전은 상기 실외 열교환기(3)의 서리가 제거되는 일정온도에 도달하게 되거나 제상운전시간이 일정시간 지난 후에 제상운전을 마치고 다시 난방운전으로 복귀하게 된다.In the heating operation, when the heating operation has elapsed for a certain time and reaches a predetermined temperature at which frost condenses on the outdoor heat exchanger 3, defrosting operation is started, and the four-way valve 7 is started according to the start of the defrosting operation. ) Is switched to the cooling operation, and the defrosting operation reaches a predetermined temperature at which the frost of the outdoor heat exchanger 3 is removed or after the defrosting operation time passes, the defrosting operation is finished, and the heating operation is returned to the heating operation again.

그러나, 종래의 공기조화기의 제상운전 방법은 제상운전의 개시를 단순히 일정시간이 경과된 조건과 상기 실외 열교환기(3)가 일정온도에 도달한 조건으로 판단하게 되므로 필요이상으로 제상운전을 하게 되어 제상운전시간이 많이 소요되는 문제점이 있다.However, in the conventional defrosting operation method of the air conditioner, since the start of the defrosting operation is simply determined as a condition in which a predetermined time has elapsed and a condition in which the outdoor heat exchanger 3 reaches a certain temperature, the defrosting operation is performed more than necessary. There is a problem that takes a lot of defrost operation time.

본 발명은 상기한 종래 기술의 문제점을 해결하기 위하여 안출된 것으로서, 제상운전 개시를 실외 열교환기와 실외공기온도를 감지하고 그에 따라 제상운전 개시를 하게 됨으로써 제상운전은 효율적으로 개시하여 제상운전에 걸리는 시간을 절약할 수 있는 공기조화기의 제상운전 방법을 제공하는데 그 목적이 있다.The present invention has been made in order to solve the above problems of the prior art, the defrosting operation is started by detecting the outdoor heat exchanger and the outdoor air temperature and the defrosting operation is started accordingly, the defrosting operation is started efficiently, the time taken for the defrosting operation An object of the present invention is to provide a defrosting operation method of an air conditioner that can save energy.

도 1은 종래기술에 의한 공기조화기의 개략적인 구성도,1 is a schematic configuration diagram of an air conditioner according to the prior art,

도 2는 본 발명에 의한 공기조화기의 개략적인 구성도,2 is a schematic configuration diagram of an air conditioner according to the present invention;

도 3은 본 발명에 의한 공기조화기의 제상운전에 관한 블록도,3 is a block diagram of a defrosting operation of an air conditioner according to the present invention;

도 4는 본 발명에 의한 공기조화기 제상운전 방법에 관한 그래프이다.Figure 4 is a graph of the air conditioner defrosting operation method according to the present invention.

〈도면의 주요 부분에 관한 부호의 설명〉<Explanation of symbols about main part of drawing>

51 : 실내 열교환기 52 : 실내 팬51: indoor heat exchanger 52: indoor fan

53 : 실외 열교환기 53a : 실외 열교환기 온도센서53: outdoor heat exchanger 53a: outdoor heat exchanger temperature sensor

53b : 실외공기 온도센서 54 : 실외 팬53b: Outdoor air temperature sensor 54: Outdoor fan

55 : 팽창밸브 56 : 압축기55 expansion valve 56 compressor

57 : 사방밸브 60 : 제어부57: four-way valve 60: control unit

본 발명은 냉매를 압축하여 토출하는 압축기와, 상기 압축기에서 토출된 냉매의 유동 방향을 변환해 주는 사방밸브와, 냉매와 외부 공기와 열 교환이 일어나는 실내외측의 열 교환기와, 상기 실내외측의 열 교환기의 냉매유량을 제어하는 팽창밸브를 포함하는 공기조화기의 제상운전 방법에 있어서,The present invention provides a compressor for compressing and discharging a refrigerant, a four-way valve for changing a flow direction of the refrigerant discharged from the compressor, a heat exchanger inside and outside where heat exchange occurs between the refrigerant and outside air, and heat inside and outside the room. In the defrosting operation method of the air conditioner comprising an expansion valve for controlling the refrigerant flow rate of the exchanger,

난방운전시에 일정시간이 경과되었는지를 판단하는 경과시간 판단단계와, 실외 열교환기의 배관온도가 일정 온도 이하인지를 판단하는 온도 판단단계와, 실외온도에 따라 제상운전을 개시여부를 판단하는 제상운전 개시단계를 포함하는 것을 특징으로 한다.An elapsed time determining step of determining whether a predetermined time has elapsed during the heating operation, a temperature determining step of determining whether a pipe temperature of the outdoor heat exchanger is below a predetermined temperature, and a defrosting determining whether to start defrosting operation according to the outdoor temperature. It characterized in that it comprises an operation start step.

여기서, 상기 제상운전 개시단계는 실외온도가 0℃ 이상인 경우에는 제상운전을 개시하고, 실외온도가 0℃ 이하인 경우에는 그 실외온도가 낮은 온도일수록 더 긴 시간 동안 난방운전을 한 후 제상운전을 개시하는 것을 특징으로 한다.Here, in the defrosting operation start step, the defrosting operation is started when the outdoor temperature is 0 ° C. or higher, and when the outdoor temperature is 0 ° C. or lower, the defrosting operation is started after the heating operation is performed for a longer time as the outdoor temperature is lower. Characterized in that.

이하, 본 발명의 실시예를 참조된 도면을 참조하여 설명하면 다음과 같다.Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.

우선 참조된 도면, 도 2는 본 발명에 의한 공기조화기의 개략적인 구성도이고, 도 3은 본 발명에 의한 공기조화기의 제상운전에 관한 블록도이며, 도 4는 본 발명에 의한 공기조화기 제상운전 방법에 관한 그래프이다.2 is a schematic configuration diagram of an air conditioner according to the present invention, FIG. 3 is a block diagram of a defrosting operation of the air conditioner according to the present invention, and FIG. 4 is an air conditioner according to the present invention. This is a graph about the defrosting operation method.

본 발명에 의한 공기조화기는 도 2 및 도 3에 도시된 바와 같이 냉방운전시에는 증발기로 난방운전시에는 응축기로 동작하는 실내 열교환기(51)와, 냉방운전시에는 응축기로 난방운전시에는 증발기로 동작하는 실외 열교환기(53)와, 상기 실외 열교환기의 배관온도를 감지하는 실외 열교환기 배관온도센서(53a)와, 실외공기의 온도를 감지하는 실외공기 온도센서(53b)와, 상기 실내 열교환기(51) 및 상기 실외 열교환기(53)에 각각 설치된 실내외 팬(52, 54)과, 상기 실내 열교환기(51)와 상기 실외 열교환기(53) 사이에 설치되어 이송되는 냉매가 용이하게 증발될 수 있도록 팽창시키는 팽창밸브(55)와, 증발기로 동작하는 열 교환기로부터 저온저압의 냉매를 흡입하여 고온고압의 냉매로 압축시키는 압축기(56)와, 상기 압축기(56)로부터 토출되는 고온고압의 냉매를 냉방운전시에는 상기 실외 열교환기(53)로 난방운전시에는 상기 실내 열교환기(51)로 이송되도록 절환되는 사방밸브(57)와 상기 실외 열교환기 온도센서(53a)와 상기 실외공기 온도센서(53b)로부터 신호를 입력받아 제상운전을 제어하는 제어부(60)로 구성된다.As shown in FIGS. 2 and 3, the air conditioner according to the present invention has an indoor heat exchanger 51 that operates as a condenser during heating operation and a condenser during heating operation, and an evaporator during heating operation as a condenser during cooling operation. An outdoor heat exchanger (53) operating in the air, an outdoor heat exchanger pipe temperature sensor (53a) for detecting a pipe temperature of the outdoor heat exchanger, an outdoor air temperature sensor (53b) for detecting a temperature of outdoor air, and the indoor The indoor and outdoor fans 52 and 54 installed in the heat exchanger 51 and the outdoor heat exchanger 53, respectively, and the refrigerant installed between the indoor heat exchanger 51 and the outdoor heat exchanger 53 are easily transferred. An expansion valve 55 which expands to be evaporated, a compressor 56 which sucks low-temperature low-pressure refrigerant from a heat exchanger operating as an evaporator and compresses the refrigerant into a high-temperature high-pressure refrigerant, and a high-temperature high pressure discharged from the compressor 56 Refrigerants The four-way valve 57 and the outdoor heat exchanger temperature sensor 53a and the outdoor air temperature sensor which are switched to be transferred to the outdoor heat exchanger 53 during the cooling operation to the indoor heat exchanger 51 during the heating operation. 53b) is configured to receive a signal from the control unit 60 for controlling the defrosting operation.

상기와 같이 구성된 본 발명에 의한 공기조화기의 제상운전 방법을 설명하면 다음과 같다.The defrosting operation method of the air conditioner according to the present invention configured as described above is as follows.

먼저, 전원이 공급되고 난방운전으로 40분 이상이 경과한 경우, 상기 제어부(60)는 상기 실외 열교환기 온도센서(53a)로부터 상기 실외 열교환기(53)의 배관온도를 감지하고 그 온도가 -5℃ 이하인 경우에는 상기 실외공기 온도센서(53b)로부터 입력된 실외공기에 따라 제상운전 개시여부를 판단한다. 즉, 상기 제어부(60)는 실외공기의 온도가 0℃ 이상인 경우에는 곧바로 제상운전을 개시하도록 하고, 실외공기의 온도가 0℃ 이하인 경우에는 아래의 식에서 그 온도에 해당하는 시간만큼 더 난방운전을 진행한 후 제상운전을 개시하게 된다.First, when power is supplied and 40 minutes or more have elapsed in a heating operation, the controller 60 senses a pipe temperature of the outdoor heat exchanger 53 from the outdoor heat exchanger temperature sensor 53a, and the temperature is −. In the case of 5 ° C. or less, it is determined whether the defrosting operation is started according to the outdoor air input from the outdoor air temperature sensor 53b. That is, the control unit 60 starts the defrosting operation immediately when the temperature of the outdoor air is 0 ° C. or more, and further heats the heating operation by the time corresponding to the temperature in the following equation when the temperature of the outdoor air is 0 ° C. or less. After the defrosting operation is started.

실외온도(℃)Outdoor temperature (℃) 00 -1-One -2-2 -3-3 -4-4 -5-5 -6-6 -7-7 -8-8 -9-9 -10-10 시간(분)Minutes 00 1212 2424 3232 4040 5252 6060 6868 7676 8080 8080

상기에서, 실외온도가 -10℃ 이하인 경우에는 그 시간을 80분으로 하여 난방하는 총시간이 120분이 되도록 한다.In the above, when the outdoor temperature is -10 ° C or less, the time is 80 minutes so that the total heating time is 120 minutes.

상기와 같이 제상운전이 개시되면, 상기 제어부(60)는 상기 사방밸브(57)가 절환되도록 하고, 상기 압축기(56), 팽창밸브(55), 실내외 팬(52, 54)을 제어하면서 제상운전을 하게 된다.When the defrosting operation is started as described above, the control unit 60 causes the four-way valve 57 to be switched, and the defrosting operation while controlling the compressor 56, the expansion valve 55, and the indoor / outdoor fans 52 and 54. Will be

그리고, 제상운전이 일정시간 이상 계속 되거나 상기 실외 열교환기(53)의 배관온도가 일정온도에 이르게 되면 상기 제어부(60)는 제상운전을 종료하고 다시 난방운전을 개시하도록 제어한다.When the defrosting operation continues for a predetermined time or when the pipe temperature of the outdoor heat exchanger 53 reaches a predetermined temperature, the controller 60 controls to end the defrosting operation and start the heating operation again.

이와 같이, 본 발명에 의한 공기조화기의 제상운전 방법은 실외공기의 온도에 따라 일정시간 상기 압축기(56)를 더 운전하게 되므로 제상운전에 소요되는 시간을 절약할 수 있는 효과를 제공한다.As described above, the defrosting operation method of the air conditioner according to the present invention provides an effect of saving the time required for the defrosting operation because the compressor 56 is further operated for a predetermined time according to the temperature of the outdoor air.

Claims (2)

냉매를 압축하여 토출하는 압축기와, 상기 압축기에서 토출된 냉매의 유동 방향을 변환해 주는 사방밸브와, 냉매와 외부 공기와 열 교환이 일어나는 실내외측의 열 교환기와, 상기 실내외측의 열 교환기의 냉매유량을 제어하는 팽창밸브를 포함하는 공기조화기의 제상운전 방법에 있어서,A compressor for compressing and discharging the refrigerant, a four-way valve for changing the flow direction of the refrigerant discharged from the compressor, a heat exchanger inside and outside where heat exchange occurs between the refrigerant and outside air, and a refrigerant in the heat exchanger inside and outside. In the defrosting operation method of the air conditioner including an expansion valve for controlling the flow rate, 난방운전시에 일정시간이 경과되었는지를 판단하는 경과시간 판단단계와, 실외 열교환기의 배관온도가 일정 온도 이하인지를 판단하는 온도 판단단계와, 실외온도에 따라 제상운전을 개시여부를 판단하는 제상운전 개시단계를 포함하는 것을 특징으로 하는 공기조화기의 제상운전 방법.An elapsed time determining step of determining whether a predetermined time has elapsed during the heating operation, a temperature determining step of determining whether a pipe temperature of the outdoor heat exchanger is below a predetermined temperature, and a defrosting determining whether to start defrosting operation according to the outdoor temperature. Defrosting operation method of the air conditioner comprising the operation start step. 상기 제상운전 개시단계는 실외온도가 0℃ 이상인 경우에는 제상운전을 개시하고, 실외온도가 0℃ 이하인 경우에는 그 실외온도가 낮은 온도일수록 더 긴 시간 동안 난방운전을 한 후 제상운전을 개시하는 것을 특징으로 하는 공기조화기의 제상운전 방법.The defrosting operation start step is to start the defrosting operation when the outdoor temperature is 0 ℃ or more, and to start the defrosting operation after heating operation for a longer time when the outdoor temperature is lower than 0 ℃. Defrosting operation method of the air conditioner characterized in that.
KR1019990019966A 1999-06-01 1999-06-01 Defrosting method for air conditioner KR20010001013A (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100444971B1 (en) * 2002-08-06 2004-08-18 삼성전자주식회사 Multi-chamber type air conditioner and method for controlling electric expansion valve thereof
KR100689897B1 (en) * 2004-12-31 2007-03-08 위니아만도 주식회사 Method for defrosting operation of air-conditioner used both cooler and heater
KR100696121B1 (en) * 2005-02-04 2007-03-20 엘지전자 주식회사 Method for defrosting of Air conditioner for simultaneously heating and cooling
US8707719B2 (en) 2008-11-17 2014-04-29 Daikin Industries, Ltd. Air conditioner
KR20140092589A (en) * 2013-01-16 2014-07-24 엘지전자 주식회사 Air Conditioner And Control Method For The Same

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100444971B1 (en) * 2002-08-06 2004-08-18 삼성전자주식회사 Multi-chamber type air conditioner and method for controlling electric expansion valve thereof
KR100689897B1 (en) * 2004-12-31 2007-03-08 위니아만도 주식회사 Method for defrosting operation of air-conditioner used both cooler and heater
KR100696121B1 (en) * 2005-02-04 2007-03-20 엘지전자 주식회사 Method for defrosting of Air conditioner for simultaneously heating and cooling
US8707719B2 (en) 2008-11-17 2014-04-29 Daikin Industries, Ltd. Air conditioner
KR20140092589A (en) * 2013-01-16 2014-07-24 엘지전자 주식회사 Air Conditioner And Control Method For The Same

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