KR20060122504A - Control process for restraining the frost of the indoor heat exchanger in air conditioner - Google Patents

Control process for restraining the frost of the indoor heat exchanger in air conditioner Download PDF

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Publication number
KR20060122504A
KR20060122504A KR1020050045035A KR20050045035A KR20060122504A KR 20060122504 A KR20060122504 A KR 20060122504A KR 1020050045035 A KR1020050045035 A KR 1020050045035A KR 20050045035 A KR20050045035 A KR 20050045035A KR 20060122504 A KR20060122504 A KR 20060122504A
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KR
South Korea
Prior art keywords
temperature
heat exchanger
indoor heat
freezing
air conditioner
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KR1020050045035A
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Korean (ko)
Inventor
박정화
Original Assignee
엘지전자 주식회사
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Priority to KR1020050045035A priority Critical patent/KR20060122504A/en
Publication of KR20060122504A publication Critical patent/KR20060122504A/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
    • F24F11/30—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
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F24F11/41—Defrosting; Preventing freezing
    • F24F11/43—Defrosting; Preventing freezing of indoor units
    • 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
    • F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
    • F25B47/02—Defrosting cycles
    • 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
    • F25B2600/02—Compressor control
    • F25B2600/025—Compressor control by controlling speed
    • F25B2600/0251—Compressor control by controlling speed with on-off operation
    • 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
    • F25B2600/11—Fan speed control
    • F25B2600/112—Fan speed control of evaporator fans
    • 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
    • F25B2700/00—Sensing or detecting of parameters; Sensors therefor
    • F25B2700/21—Temperatures
    • F25B2700/2117—Temperatures of an evaporator

Abstract

A control method for preventing freezing of an indoor heat exchanger in an air conditioner is provided to prevent temperature of an indoor heat exchanger from lowering below a freezing point during operation of the air conditioner, and leakage of water generated by temperature deviation per position in the indoor heat exchanger. In a control method for preventing freezing of an indoor heat exchanger in an air conditioner, temperature of refrigerant pipes of an indoor heat exchanger is sensed during operation of a compressor, so that the temperature is compared with a freezing point(T)(S10-S30). If the sensed temperature is lower than a first temperature(A), which is higher than the freezing point, rpm of a fan motor for an indoor fan is set to be higher than a set rpm for normal operation mode by a predetermined degree(S40,S45). If the sensed temperature is higher than a second temperature(B), which is higher than the first one, the rpm of the fan motor is returned to the set rpm(S50,S55).

Description

공기조화기의 실내열교환기 결빙방지제어방법{Control process for restraining the frost of the indoor heat exchanger in air conditioner}Control process for restraining the frost of the indoor heat exchanger in air conditioner

도 1은 본 발명에 따른 공기조화기가 도시된 사시도,1 is a perspective view showing an air conditioner according to the present invention;

도 2는 본 발명에 따른 공기조화기의 냉방운전이 도시된 개략 구성도,Figure 2 is a schematic configuration diagram showing the cooling operation of the air conditioner according to the present invention,

도 3은 본 발명에 따른 공기조화기가 도시된 구성도,3 is a block diagram showing an air conditioner according to the present invention,

도 4는 본 발명에 따른 공기조화기의 실내열교환기 결빙방지제어방법이 도시된 순서도이다. Figure 4 is a flow chart illustrating a method of preventing the indoor heat exchanger freezing of the air conditioner according to the present invention.

<도면의 주요 부분에 관한 부호의 설명><Explanation of symbols on main parts of the drawings>

10: 실내기 11: 실내열교환기10: indoor unit 11: indoor heat exchanger

12: 실내송풍팬 13: 실내송풍팬 모터12: indoor blowing fan 13: indoor blowing fan motor

14: 실내기 제어부 15: 실내배관센서14: indoor unit control unit 15: indoor piping sensor

20: 실외기 21: 실외열교환기20: outdoor unit 21: outdoor heat exchanger

22: 실외송풍팬 23: 실외송풍팬 모터 22: Outdoor Blower Fan 23: Outdoor Blower Fan Motor

24: 어큐뮬레이터 25: 압축기24: accumulator 25: compressor

26: 사방밸브 27: 실외배관센서 26: Four-way valve 27: Outdoor piping sensor

30: 냉매배관 S10: 압축기구동판단단계 30: refrigerant piping S10: compressor driving determination step

S20: 압축기 구동시간판단단계 S30: 결빙판단단계 S20: Compressor driving time determination step S30: Freezing determination step

S40: 제 1결빙방지단계 S50: 제 2결빙방지단계 S40: first freezing prevention step S50: second freezing prevention step

S60: 제 3결빙방지단계 A: 제 1온도 S60: third freezing prevention step A: first temperature

B: 제 2온도 C: 제 3온도 B: second temperature C: third temperature

T: 결빙온도T: freezing temperature

본 발명은 공기조화기의 실내 열교환기 결빙방지제어방법에 관한 것으로서, 특히 압축기의 온/오프를 최대한 자제하는 것과 아울러 상기 공기조화기의 냉방운전시 실내 열교환기의 온도를 감지하여 실내 송풍기의 팬모터 회전속도를 제어함으로서 상기 실내 열교환기의 결빙을 억제하는 공기조화기의 제어방법에 관한 것이다.The present invention relates to an indoor heat exchanger anti-icing control method of an air conditioner, and in particular, to control the compressor on / off as much as possible and to detect the temperature of the indoor heat exchanger during the cooling operation of the air conditioner fan of the indoor blower. The present invention relates to a control method of an air conditioner that suppresses freezing of the indoor heat exchanger by controlling a motor rotation speed.

종래 발명에 의한 공기조화기의 결빙방지제어방법을 살펴보면 다음과 같다. Looking at the anti-icing control method of the air conditioner according to the prior invention as follows.

일반적으로 분리형 공기 조화기는 실내기와 실외기로 구성되고, 상기 실내기에는 실내 송풍팬 및 실내 열교환기가 설치되며, 상기 실외기에는 압축기, 실외 열교환기, 팽창밸브, 사방밸브 및 실외 송풍팬이 설치되고, 상기 실내기와 상기 실외 기는 냉매가 유동되는 배관을 통해 연결된다. In general, a separate air conditioner includes an indoor unit and an outdoor unit, and the indoor unit is provided with an indoor blowing fan and an indoor heat exchanger, and the outdoor unit is provided with a compressor, an outdoor heat exchanger, an expansion valve, a four-way valve, and an outdoor blowing fan. And the outdoor unit are connected through a pipe through which a refrigerant flows.

그래서, 상기 공기 조화기는 상기 사방밸브의 전환에 따라 냉매의 순환방향이 결정되어 냉방운전 또는 난방운전을 행하게 되고, 냉방운전시에는 상기 압축기에서 압축된 냉매는 상기 사방밸브를 거쳐 상기 실외열교환기로 유입되어 상기 압축된 냉매를 응축시키고, 상기 응축된 냉매는 상기 팽창밸브를 통해 팽창된 후 상기 냉매배관을 통해 상기 실내열교환기에 공급되며, 상기 실내열교환기는 실내공기와 상기 냉매를 열교환시켜 상기 냉매가 상기 실내열교환기를 순환하는 공기에 포함된 열을 흡수함으로써 실내측으로 차가운 바람이 배출된다.      Thus, the air conditioner determines the circulation direction of the refrigerant according to the switching of the four-way valve to perform a cooling operation or a heating operation, and during the cooling operation, the refrigerant compressed by the compressor flows into the outdoor heat exchanger through the four-way valve. And condensing the compressed refrigerant, the condensed refrigerant is expanded through the expansion valve and then supplied to the indoor heat exchanger through the refrigerant pipe, and the indoor heat exchanger heat-exchanges the indoor air and the refrigerant to form the refrigerant. By absorbing the heat contained in the air circulating in the indoor heat exchanger, cool wind is discharged to the indoor side.

여기서, 상기 실내공기와 냉매와의 열교환에 따라, 상기 실내 열교환기가 결빙온도(T)이하가 되면 상기 열교환기의 표면에는 결빙이 발생한다. Here, when the indoor heat exchanger is below the freezing temperature (T) as the heat exchange between the indoor air and the refrigerant, freezing occurs on the surface of the heat exchanger.

따라서, 종래에는 상기와 같은 공기 조화기 작동 중의 결빙을 방지하기 위해 실내 냉매배관의 온도를 감지한 후 상기 실내 냉매배관의 온도가 소정온도 이하일 경우 상기 압축기를 정지하고, 상기 실내 열교환기를 정지 또는 상기 실내송풍기의 팬모터를 설정회전속도로 운전하도록 하는 방법으로 상기 실내 열교환기의 결빙을 방지하였다. Therefore, in the related art, after the temperature of the indoor refrigerant pipe is sensed to prevent freezing during operation of the air conditioner, the compressor is stopped when the temperature of the indoor refrigerant pipe is less than a predetermined temperature, and the indoor heat exchanger is stopped or the In order to operate the fan motor of the indoor blower at the set rotation speed to prevent freezing of the indoor heat exchanger.

그런데, 종래와 같이 상기 실내열교환기의 표면부위별 온도편차에 의해 여전히 결빙이 일어나는 부분이 발생하여 누수등이 발생하는 문제점을 가지고 있다. However, as in the related art, a portion in which freezing still occurs due to a temperature difference for each surface portion of the indoor heat exchanger has a problem in that leakage occurs.

본 발명은 상기한 종래 기술의 문제점을 해결하기 위하여 안출된 것으로서, 그 목적은 공기조화기의 실내 열교환기에 부위별 온도편차가 발생하더라도 결빙이 발생하는 온도보다 높은 특정온도에서 실내송풍기의 팬모터를 설정회전속도보다 더높은 회전속도로 구동하여 실내 열교환기의 표면온도를 높임으로서, 결빙이 생기지 않도록 하는 공기 조화기의 실내열교환기 결빙방지제어방법을 제공하는데 있다. The present invention has been made to solve the above-mentioned problems of the prior art, the object of which is that the fan motor of the indoor blower at a specific temperature higher than the temperature at which icing occurs even if the temperature deviation of each part occurs in the indoor heat exchanger of the air conditioner The present invention provides an indoor heat exchanger anti-icing control method of an air conditioner to prevent freezing by increasing the surface temperature of an indoor heat exchanger by driving at a higher rotational speed than a preset rotational speed.

상기한 과제를 해결하기 위한 본 발명에 의한 공기 조화기의 실내열교환기 결빙방지제어방법의 특징에 따르면, 공기조화기의 냉방운전제어방법에 있어서, 압축기 구동중에 실내 열교환기의 냉매배관온도를 감지하여 상기 냉매배관온도가 결빙온도(T)이하인지를 판단하는 결빙판단단계와, 상기 결빙온도(T)보다 높은 제 1온도(A)이하일 경우, 상기 실내 열교환을 위한 팬 모터의 회전속도를 정상운전상태의 설정회전속도보다 일정회전속도만큼 높게 설정하여 운전하는 제 1결빙방지단계와, 상기 배관온도가 상기 제 1온도(A)보다 높게 설정된 제 2온도(B)보다 높은 경우, 상기 실내 열교환을 위한 팬 모터를 상기 설정회전속도로 복귀운전하는 제 2결빙방지단계를 포함하여 구성되는 것을 특징으로 한다. According to a feature of the indoor heat exchanger freezing prevention control method of the air conditioner according to the present invention for solving the above problems, in the cooling operation control method of the air conditioner, the refrigerant pipe temperature of the indoor heat exchanger during the operation of the compressor is sensed Determining whether the refrigerant pipe temperature is equal to or lower than the freezing temperature (T), and when the first temperature (A) is lower than the freezing temperature (T), the rotation speed of the fan motor for indoor heat exchange is normalized. A first anti-icing step of operating by setting a predetermined rotational speed higher than a predetermined rotational speed of the operating state; and when the pipe temperature is higher than the second temperature (B) set higher than the first temperature (A), the indoor heat exchange And a second anti-icing step of returning the fan motor to the set rotation speed.

이하, 본 발명의 바람직한 실시예를 첨부된 도면을 참조하여 보다 상세히 설명하면 다음과 같다.Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

도 1은 본 발명에 따른 공기조화기가 도시된 사시도이고, 도 2는 본 발명에 따른 공기조화기의 냉방운전이 도시된 개략 구성도이고, 도 3은 본 발명에 따른 공 기조화기가 도시된 구성도이며, 도 4는 본 발명에 따른 공기조화기의 팬 모터 제어방법이 도시된 흐름도이다. 1 is a perspective view showing an air conditioner according to the present invention, Figure 2 is a schematic configuration diagram showing the cooling operation of the air conditioner according to the present invention, Figure 3 is a configuration showing an air conditioner according to the present invention 4 is a flowchart illustrating a fan motor control method of an air conditioner according to the present invention.

도 1 , 도 2 또는 도 3에 도시된 바와 같이, 본 발명에 따른 공기조화기는 실내기(10)와 실외기(20)로 구성되고, 상기 실내기(10)와 상기 실외기(20)는 냉매배관(30)을 통해 연결된다. As shown in FIG. 1, FIG. 2, or FIG. 3, the air conditioner according to the present invention includes an indoor unit 10 and an outdoor unit 20, and the indoor unit 10 and the outdoor unit 20 are refrigerant pipes 30. Is connected via).

여기서 상기 실내기(10)에는 실내열교환기(11), 실내송풍팬(12) 및 상기 실내송풍팬(12)의 팬모터(13), 실내기 제어부(14)와 상기 실내열교환기(11)의 배관온도를 감지하는 배관센서(15)를 포함하여 구성되고, 상기 실내기 제어부(14)에 입력된 신호에 따라 상기 팬모터(13)가 제어되게 된다. Here, the indoor unit 10 includes an indoor heat exchanger 11, an indoor blowing fan 12, a fan motor 13 of the indoor blowing fan 12, an indoor unit control unit 14, and a pipe of the indoor heat exchanger 11. It is configured to include a pipe sensor 15 for sensing the temperature, the fan motor 13 is controlled in accordance with the signal input to the indoor unit controller (14).

상기 실외기(20)는 실외송풍팬(22) 및 실외송풍팬(22)의 팬모터(23), 어큐뮬레이터(24), 압축기(25), 사방밸브(26), 팽창밸브(28), 실외열교환기(21) 및 실외기 제어부(29)와 상기 실외열교환기(21)의 배관온도를 감지하는 배관센서(28)가 통신가능하게 연결되어 상기 실외기 제어부(29)가 상기 실외 배관센서(28)의 감지 결과에 따라 상기 실외팬모터(23)와 사방밸브의 구동부(미도시)와 압축기의 구동부(미도시)를 제어한다.The outdoor unit 20 includes an outdoor blower fan 22 and a fan motor 23, an accumulator 24, a compressor 25, a four-way valve 26, an expansion valve 28, and outdoor heat exchange of the outdoor blower fan 22. Unit 21, outdoor unit controller 29 and the pipe sensor 28 for sensing the pipe temperature of the outdoor heat exchanger 21 is communicatively connected so that the outdoor unit control unit 29 of the outdoor pipe sensor 28 According to the detection result, the outdoor fan motor 23 and the driving unit (not shown) of the four-way valve and the driving unit (not shown) of the compressor are controlled.

상기와 같은 구성을 갖는 공기조화기가 냉방운전될 경우, 상기 압축기(25)로 흡입되는 냉매중 액체냉매가 저장되고 기체냉매만이 상기 어큐뮬레이터(24)에 의해 공급되고, 상기 압축기(25)에서 압축된 냉매는 상기 사방밸브(26)를 거쳐 상기 실외열교환기(21)로 유입되어 상기 압축된 냉매를 응축시키고, 상기 응축된 냉매는 상기 팽창밸브(28)를 통해 팽창된 후 상기 냉매배관(30)을 통해 상기 실내열교환기 (11)에 공급되며, 상기 실내열교환기(11)는 실내공기와 상기 냉매를 열교환시켜 상기 팽창된 냉매를 증발시킴으로서 실내공기를 냉각시키게 되고, 상기 증발된 냉매는 다시 상기 압축기(25)에 공급되어 압축됨으로서 상기 냉방 사이클을 반복하게 된다. When the air conditioner having the above configuration is cooled and operated, the liquid refrigerant in the refrigerant sucked into the compressor 25 is stored, and only the gas refrigerant is supplied by the accumulator 24 and compressed in the compressor 25. The refrigerant is introduced into the outdoor heat exchanger 21 through the four-way valve 26 to condense the compressed refrigerant, and the condensed refrigerant is expanded through the expansion valve 28 and then the refrigerant pipe 30 Is supplied to the indoor heat exchanger (11), and the indoor heat exchanger (11) heats the indoor air and the refrigerant to cool the indoor air by evaporating the expanded refrigerant, and the evaporated refrigerant is again The cooling cycle is repeated by being supplied to the compressor 25 and compressed.

한편, 상기 공기조화기가 냉방운전 될 경우, 상기 실내송풍팬(12)의 팬 모터(13)는 사용자에 의해 설정된 값인 설정회전속도로 작동되어 상기 실내열교환기(11)에 의해 열교환된 공기를 실내로 송풍한다.On the other hand, when the air conditioner is cooled, the fan motor 13 of the indoor blower fan 12 is operated at a set rotation speed which is a value set by a user to indoor the heat exchanged by the indoor heat exchanger 11. Blow into

여기서, 상기 실내열교환기(11)의 표면은 상기 냉매에 의해 냉각되기 때문에 상기 실내열교환기(11) 표면의 온도가 소정 결빙온도(T)이하가 되면, 공기 중의 수증기가 결빙되는바, 본 발명의 공기조화기는 상기 실내열교환기(11)의 결빙을 방지하기 위한 팬 모터(13)의 제어알고리즘이 실내기 제어부(14)에 의해 구현된다.Here, since the surface of the indoor heat exchanger (11) is cooled by the refrigerant, when the temperature of the surface of the indoor heat exchanger (11) is below a predetermined freezing temperature (T), water vapor in the air freezes, the present invention In the air conditioner, a control algorithm of the fan motor 13 for preventing freezing of the indoor heat exchanger 11 is implemented by the indoor unit controller 14.

도 4에 도시된 바와 같이, 상기 공기조화기의 결빙방지제어방법은 압축기의 작동상태를 판단하는 압축기 구동 판단단계(S10)와, 압축기가 구동중인 경우 압축기의 작동시간을 카운팅하여 판단하는 압축기 구동시간 판단단계(S20)와, 상기 실내열교환기의 배관온도가 제 1온도(A)이하이면 팬 모터의 현 설정회전속도의 회전속도보다 일정 회전속도가 높게 설정하고(S50), 제 1온도(A)보다 높은 제 2온도(B)보다 높은 경우 상기 팬 모터를 설정회전속도로 유지시키고(S60), 결빙온도(T)보다 낮은 제 3온도(C)보다 낮은 경우 상기 실외 열교환기의 압축기 구동을 정지시키고 상기 팬모터를 설정회전속도로 유지시키는(S60) 상기 실내 열교환기의 결빙을 방지하는 결빙방지제어단계(S40 내지 S60)를 포함하여 구성된다.As shown in FIG. 4, the method for preventing icing of the air conditioner includes a compressor driving determination step (S10) of determining an operating state of the compressor, and a compressor driving counting the operating time of the compressor when the compressor is being driven. When the time determination step (S20) and the pipe temperature of the indoor heat exchanger is less than the first temperature (A), the predetermined rotation speed is set higher than the rotation speed of the current set rotation speed of the fan motor (S50), and the first temperature ( When the temperature is higher than the second temperature B higher than A), the fan motor is maintained at the set rotation speed (S60), and when the temperature is lower than the third temperature C lower than the freezing temperature T, the compressor of the outdoor heat exchanger is driven. It stops and maintains the fan motor at a set rotation speed (S60) is configured to include an ice prevention control step (S40 to S60) to prevent the ice of the indoor heat exchanger.

여기서 상기 실내열교환기의 배관온도는 출구측 배관 온도인 것이 바람직하다.Here, the pipe temperature of the indoor heat exchanger is preferably the outlet pipe temperature.

그리고 상기 압축기구동 판단단계(S10)는 공기조화기가 작동 중임에도 실내온도가 낮아서 상기 압축기가 작동되지 않을 수 있는 바, 이를 판단하기 위한 단계이고, 상기 압축기가 구동 중인 경우 상기 압축기 구동시간 판단단계(S20)가 수행되고, 그렇지 않을 경우 즉, 압축기가 구동되지 않은 상태인 경우 상기 팬 모터의 설정회전속도로 유지시킨다.And the compressor drive determination step (S10) is a bar for determining that the compressor may not operate because the room temperature is low even when the air conditioner is in operation, and if the compressor is running the compressor drive time determination step ( S20) is performed, otherwise, that is, if the compressor is not driven to maintain the set rotation speed of the fan motor.

상기 결빙방지제어단계는 상기 실내 열교환기의 배관온도가 결빙온도(T)보다 작거나 같은지를 판단하는 결빙판단단계(S30)와, 상기 제 1 온도(A)보다 같거나 낮은지를 판단하는 제 1 결빙방지단계(S40)와, 상기 배관온도가 제 2 온도(B)보다 높은지를 판단하는 제 2 결빙방지단계(S50)와, 상기 제 1 결빙방지단계(S40)후에 상기 배관온도가 제 3온도(C)보다 같거나 낮은지를 판단하는 제 3 결빙방지단계(S60)를 포함하여 구성된다.The freezing prevention control step may include a freezing determination step (S30) for determining whether a pipe temperature of the indoor heat exchanger is less than or equal to a freezing temperature (T), and a first determining whether the pipe temperature of the indoor heat exchanger is less than or equal to the first temperature (A). An anti-freezing step (S40), a second anti-icing step (S50) for determining whether the pipe temperature is higher than the second temperature (B), and the pipe temperature after the first freezing prevention step (S40) is a third temperature And a third anti-icing step (S60) for determining whether it is equal to or lower than (C).

여기서 상기 제 1, 2, 3 온도(A)(B)(C)중 상기 제 2온도(B)가 제일 높고, 제 3온도(C)가 가장 낮다.The second temperature B is the highest among the first, second and third temperatures A, B, and C, and the third temperature C is the lowest.

그리고, 상기 제 1결빙방지단계(S40)에서는 상기 실내 열교환기의 냉배배관온도가 상기 결빙온도(T)보다 높은 제 1온도(A)보다 같거나 낮을 경우 설정회전속도에 소정의 회전속도를 더한 회전속도로 실내송풍기의 팬모터를 구동시켜 상기 실내 열교환기에 보다 많은 양의 바람을 송풍하게 되고, 상기 송풍된 공기에 의해 상기 실내 열교환기의 표면온도를 높게 한다.In addition, in the first freezing prevention step (S40), if the cold piping temperature of the indoor heat exchanger is equal to or lower than the first temperature A higher than the freezing temperature T, a predetermined rotation speed is added to the set rotation speed. The fan motor of the indoor blower is driven at a rotational speed to blow more wind into the indoor heat exchanger, and the surface temperature of the indoor heat exchanger is increased by the blown air.

그러나, 상기 실내 열교환기의 냉배배관온도가 제 1온도(A)보다 높을 때에는 상기 실내송풍기의 팬모터를 설정회전속도로 유지시킨다.However, when the cold piping temperature of the indoor heat exchanger is higher than the first temperature (A), the fan motor of the indoor blower is maintained at the set rotation speed.

또한, 상기 제 2결빙방지단계(S50)에서는 상기 실내 열교환기의 냉배배관온도가 상기 제 1결빙방지단계(S40)를 통과하되 상기 제 1온도(A)보다 높은 제 2온도(B)보다 높은 경우 상기 제 1결빙방지단계(S40)에서의 회전속도보다는 낮은 설정회전속도로 복귀시켜 실내송풍기의 팬모터를 회전시킨다.In addition, in the second freezing prevention step (S50), the cold piping temperature of the indoor heat exchanger passes through the first freezing prevention step (S40) but is higher than the second temperature (B) higher than the first temperature (A). In this case, the fan motor of the indoor blower is rotated by returning to the set rotation speed lower than the rotation speed in the first icing prevention step (S40).

다음으로, 상기 제 3결빙방지단계(S60)에서는 상기 실내 열교환기의 냉배배관온도가 상기 제 1결빙방지단계(S40)를 통과하였으나 상기 결빙온도(T)보다 낮은 제3온도(C)보다 낮은 경우 상기 실외 열교환기의 압축기 및 실외 송풍기를 정지시킴과 아울러 상기 실내 송풍기의 팬모터를 설정회전속도로 구동시킨후, 실내열교환기의 표면온도를 높아지게 한다.Next, in the third freezing prevention step (S60), the cold piping temperature of the indoor heat exchanger has passed the first freezing prevention step (S40) but lower than the third temperature (C) lower than the freezing temperature (T). In this case, the compressor and the outdoor blower of the outdoor heat exchanger are stopped, and the fan motor of the indoor blower is driven at a predetermined rotational speed, thereby increasing the surface temperature of the indoor heat exchanger.

그러나, 상기 실내 열교환기의 냉배배관온도가 상기 제 1결빙방지단계(S40)를 통과하였으나 상기 제 3온도(C)보다 높을 경우 실내열교환기의 표면온도를 높이기 위해 상기 제 1결빙방지단계(S45)로 복귀시킨다.However, when the cold piping temperature of the indoor heat exchanger passes the first freezing prevention step (S40) but is higher than the third temperature (C), the first freezing prevention step (S45) to increase the surface temperature of the indoor heat exchanger. Return to).

따라서, 상기 결빙방지단계(S40 내지 S60)는 상기 실내 열교환기의 냉배배관온도가 상기 제 1온도(A)보다 낮았을 경우, 상기 실내열교환기의 팬모터의 회전속도를 설정회전속도에 소정의 회전속도를 더한 회전속도로 팬모터를 구동시킴으로서 상기 실내열교환기의 표면온도를 높여주어 상기 실내 열교환기의 냉매배관온도를 감지하는 부위의 온도편차에 의해 발생할 수 있는 결빙으로 인한 누수등의 문제를 방지할 수 있다.Therefore, in the freezing prevention step (S40 to S60), when the cold piping temperature of the indoor heat exchanger is lower than the first temperature (A), the rotational speed of the fan motor of the indoor heat exchanger is set to a predetermined rotational speed. By operating the fan motor at the rotational speed plus the rotational speed, the surface temperature of the indoor heat exchanger is increased to solve the problems such as water leakage due to freezing caused by the temperature deviation of the sensing area of the refrigerant heat exchanger of the indoor heat exchanger. You can prevent it.

이상과 같이 본 발명에 의한 공기조화기의 실내열교환기 결빙방지제어방법을예시된 도면을 참조로 설명하였으나, 본 명세서에 개시된 실시예와 도면에 의해 본 발명은 한정되지 않고, 기술사상이 보호되는 범위 이내에서 응용될 수 있다. As described above, the indoor heat exchanger freezing prevention control method of the air conditioner according to the present invention was described with reference to the illustrated drawings, but the present invention is not limited by the embodiments and drawings disclosed herein, and the technical concept is protected. It can be applied within the range.

상기와 같이 구성되는 본 발명에 의한 공기조화기의 실내열교환기 결빙방지제어방법은 공기조화기의 작동중에 실내열교환기의 온도가 결빙온도이하로 내려가는 것을 방지하는 결빙방지제어단계를 수행하기 때문에, 상기 실내열교환기에 부위별 온도편차에 의해 발생할 수 있는 누수등의 문제를 제거함으로서, 상기 실내열교환기가 결빙되는 것을 최대한 억제하는 이점을 가지고 있다.Since the indoor heat exchanger anti-icing control method of the air conditioner according to the present invention configured as described above performs an anti-ice control step of preventing the temperature of the indoor heat exchanger from dropping below freezing temperature during operation of the air conditioner. By eliminating the problems such as leakage caused by the temperature deviation for each part in the indoor heat exchanger, it has the advantage of suppressing the freezing of the indoor heat exchanger as much as possible.

Claims (4)

공기조화기의 냉방운전제어방법에 있어서,In the cooling operation control method of the air conditioner, 압축기 구동중에 실내 열교환기의 냉매배관온도를 감지하여 상기 냉매배관온도가 결빙온도(T)이하인지를 판단하는 결빙판단단계와;A freezing judging step of detecting a refrigerant pipe temperature of the indoor heat exchanger during the operation of the compressor to determine whether the refrigerant pipe temperature is below the freezing temperature (T); 상기 결빙온도(T)보다 높은 제 1온도(A)이하일 경우, 상기 실내 열교환을 위한 팬 모터의 회전속도를 정상운전상태의 설정회전속도보다 일정회전속도만큼 높게 설정하여 운전하는 제 1결빙방지단계와;When the temperature is less than the first temperature (A) higher than the freezing temperature (T), the first freezing prevention step of operating by setting the rotational speed of the fan motor for the indoor heat exchange higher than the set rotational speed in the normal operation state by a predetermined rotational speed Wow; 상기 배관온도가 상기 제 1온도(A)보다 높게 설정된 제 2온도(B)보다 높은 경우, 상기 실내 열교환을 위한 팬 모터를 상기 설정회전속도로 복귀운전하는 제 2결빙방지단계를 포함하여 구성되는 것을 특징으로 하는 공기조화기의 실내열교환기 결빙방지 제어방법.When the piping temperature is higher than the second temperature (B) is set higher than the first temperature (A), comprising a second anti-icing step of returning the fan motor for the indoor heat exchange at the set rotation speed Ice heat prevention control method of the indoor heat exchanger, characterized in that the air conditioner. 제 1항에 있어서,The method of claim 1, 상기 결빙판단단계에서 상기 실내열교환기의 배관온도가 상기 결빙온도(T)이하일 경우, 실외 열교환기의 압축기를 정지시킴과 아울러 상기 팬모터 회전속도를 상기 설정회전속도로 하여 구동시키는 것을 특징으로 하는 공기조화기의 실내열교환기 결빙방지 제어방법.When the pipe temperature of the indoor heat exchanger is below the freezing temperature (T) in the freezing determination step, the compressor of the outdoor heat exchanger is stopped and the fan motor is rotated at the set rotation speed. Control method of freezing prevention of indoor heat exchanger of air conditioner. 제 1항에 있어서,The method of claim 1, 상기 제 2 결빙방지단계에서 상기 배관온도가 상기 결빙온도(T)보다 낮은 제 3온도(C)이하인 경우, 실외 열교환기의 압축기를 정지시킴과 아울러 상기 실내 열교환을 위한 팬 모터를 상기 설정회전속도로 운전시키는 것을 특징으로 하는 공기조화기의 실내 열교환기 결빙방지 제어방법.When the pipe temperature is less than or equal to the third temperature (C) lower than the freezing temperature (T) in the second freezing prevention step, the compressor of the outdoor heat exchanger is stopped and the fan motor for the indoor heat exchange is set at the set rotation speed. Control method of the indoor heat exchanger freezing of the air conditioner, characterized in that the operation. 제 1항에 있어서,The method of claim 1, 상기 제 2 결빙방지단계에서 상기 배관온도가 상기 제 3온도(C)보다 높을 경우 상기 실내 열교환기의 배관온도가 상승되도록 상기 제 1결빙방지단계의 팬 모터 회전속도를 유지시키는 것을 특징으로 하는 공기조화기의 실내열교환기 결빙방지 제어방법.In the second freezing prevention step, if the pipe temperature is higher than the third temperature (C), the air to maintain the fan motor rotational speed of the first freezing prevention step to increase the pipe temperature of the indoor heat exchanger Control method of freezing prevention of indoor heat exchanger of air conditioner.
KR1020050045035A 2005-05-27 2005-05-27 Control process for restraining the frost of the indoor heat exchanger in air conditioner KR20060122504A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106642509A (en) * 2015-10-30 2017-05-10 青岛海尔空调器有限总公司 Control method for preventing heat exchanger in indoor unit of radiation type air conditioner from being frosted
CN110836456A (en) * 2018-08-17 2020-02-25 青岛海尔空调器有限总公司 Control method for inhibiting frosting of air conditioner
CN110836457A (en) * 2018-08-17 2020-02-25 青岛海尔空调器有限总公司 Control method for inhibiting frosting of air conditioner
CN111550906A (en) * 2020-05-21 2020-08-18 广东美的制冷设备有限公司 Anti-freezing control method for indoor unit of air conditioner and air conditioner

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106642509A (en) * 2015-10-30 2017-05-10 青岛海尔空调器有限总公司 Control method for preventing heat exchanger in indoor unit of radiation type air conditioner from being frosted
CN106642509B (en) * 2015-10-30 2019-05-31 青岛海尔空调器有限总公司 A kind of control method for preventing heat exchanger frosting in radiant air conditioning indoor unit
CN110836456A (en) * 2018-08-17 2020-02-25 青岛海尔空调器有限总公司 Control method for inhibiting frosting of air conditioner
CN110836457A (en) * 2018-08-17 2020-02-25 青岛海尔空调器有限总公司 Control method for inhibiting frosting of air conditioner
CN111550906A (en) * 2020-05-21 2020-08-18 广东美的制冷设备有限公司 Anti-freezing control method for indoor unit of air conditioner and air conditioner

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