KR20010047575A - Heating overload driving control apparatus and method for inverter heat pump - Google Patents
Heating overload driving control apparatus and method for inverter heat pump Download PDFInfo
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- KR20010047575A KR20010047575A KR1019990051868A KR19990051868A KR20010047575A KR 20010047575 A KR20010047575 A KR 20010047575A KR 1019990051868 A KR1019990051868 A KR 1019990051868A KR 19990051868 A KR19990051868 A KR 19990051868A KR 20010047575 A KR20010047575 A KR 20010047575A
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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
- F24F11/88—Electrical aspects, e.g. circuits
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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
- F24F11/86—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump circuits
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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
- F24F12/00—Use of energy recovery systems in air conditioning, ventilation or screening
- F24F12/001—Use of energy recovery systems in air conditioning, ventilation or screening with heat-exchange between supplied and exhausted air
- F24F12/002—Use of energy recovery systems in air conditioning, ventilation or screening with heat-exchange between supplied and exhausted air using an intermediate heat-transfer fluid
- F24F12/003—Use of energy recovery systems in air conditioning, ventilation or screening with heat-exchange between supplied and exhausted air using an intermediate heat-transfer fluid using a heat pump
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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
- F24F2140/00—Control inputs relating to system states
- F24F2140/10—Pressure
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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
- F24F2140/00—Control inputs relating to system states
- F24F2140/50—Load
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- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Air Conditioning Control Device (AREA)
Abstract
Description
본 발명은 인버터 히트펌프의 난방 과부하 운전 제어장치 및 방법에 관한 것으로, 특히 난방 과부하 조건에서의 난방운전시에 적정 토출압력에서 안정적인 운전을 수행할 수 있도록 한 인버터 히트펌프의 난방 과부하 운전 제어장치 및 방법에 관한 것이다.The present invention relates to a heating overload operation control apparatus and method for an inverter heat pump, and more particularly, to a heating overload operation control apparatus for an inverter heat pump capable of performing stable operation at an appropriate discharge pressure during heating operation under a heating overload condition; It is about a method.
도1은 종래 인버터 히트펌프의 난방 과부하 운전 제어장치에 대한 구성을 보인 블록도로서, 이에 도시된 바와같이 입력전원(AC)을 직류전원으로 변환하는 교류/직류변환부(10)와; 실내 부하에 따른 운전주파수의 변화에 따른 적절한 펄스폭변조신호를 출력하는 제어부(13)와; 상기 교류/직류변환부(10)로부터 직류전원을 입력받아 이를 상기 펄스폭변조신호에 의해 스위칭하여 3상으로 가변하여 출력하는 인버터부(11)와; 상기 인버터부(11)의 출력신호에 따라 구동되는 압축기(12)와; 상기 압축기(12)의 구동압력이 설정 압력 이상이면 입력전원(AC)을 차단하는 압력스위치 (SW)로 구성되며, 이와같은 종래 장치의 동작을 설명한다.1 is a block diagram showing a configuration of a heating overload operation control apparatus of a conventional inverter heat pump, and as shown therein, an AC / DC converter 10 for converting an input power source AC into a direct current power source; A control unit 13 for outputting an appropriate pulse width modulated signal according to a change in operating frequency according to an indoor load; An inverter unit (11) for receiving a DC power from the AC / DC converter (10) and switching it by the pulse width modulation signal to change the output into three phases; A compressor 12 driven according to the output signal of the inverter unit 11; When the drive pressure of the compressor 12 is greater than or equal to the set pressure, the pressure switch SW cuts off the input power source AC, and the operation of the conventional apparatus will be described.
먼저, 교류/직류변환부(10)는 입력전원(AC)을 입력받아 이를 변환하여 직류전압으로 변환하고, 제어부(13)는 초기 목표운전주파수에 따른 펄스폭변조신호를 인버터부(11)에 인가하며, 그러면 인버터부(11)는 상기 교류/직류변환부(10)의 직류전압을 입력받아 이를 상기 제어부(13)의 펄스폭변조신호에 의해 스위칭하여 3상으로 가변된 교류전압을 압축기(12)에 인가하며, 이에 의해 상기 압축기(12)는 구동되어 소정 압력을 토출한다.First, the AC / DC converter 10 receives an input power source AC and converts it into a DC voltage, and the controller 13 transmits a pulse width modulated signal according to the initial target driving frequency to the inverter unit 11. Then, the inverter unit 11 receives the DC voltage of the AC / DC converter 10 and switches it by the pulse width modulated signal of the controller 13 to convert the AC voltage changed into three phases. 12, by which the compressor 12 is driven to discharge a predetermined pressure.
이때, 압력스위치(SW)는 상기 압축기(12)의 토출압력이 설정 압력이상이 되면 전원을 차단하도록 스위칭된다.At this time, the pressure switch SW is switched to cut off the power when the discharge pressure of the compressor 12 is higher than the set pressure.
여기서, 상기 히트펌프가 난방운전을 시작하면 실외팬이 운전되고 압축기(12)가 제어부(13)의 펄스폭변조신호에 의해 초기 목표 운전주파수를 향하여 상승하면서 운전된다.Here, when the heat pump starts the heating operation, the outdoor fan is operated and the compressor 12 is operated while rising toward the initial target operating frequency by the pulse width modulation signal of the control unit 13.
이때, 실내팬은 찬바람의 토출을 막기 위하여 초기 운전후 실내배관온도가 적정온도에 도달된후 운전되어 따뜻한 바람을 토출시키는데, 즉 실내배관온도가 적정온도에 도달할 때까지 실내팬을 동작시키지 않기 때문에 압축기(12)는 상당한 압력이 가해지게 되어 그 압축기(12) 자체 및 사방변등의 부품을 손상시키게 된다.At this time, the indoor fan is operated after the indoor piping temperature reaches the proper temperature after the initial operation to prevent the discharge of cold wind to discharge the warm wind, that is, do not operate the indoor fan until the indoor piping temperature reaches the appropriate temperature. As a result, the compressor 12 is subjected to considerable pressure, thereby damaging the compressor 12 itself and other parts such as four sides.
따라서, 압력스위치(SW)를 일정 압력 이상이 되면 스위칭시켜 전원을 차단함으로써 압축기(12)의 운전을 정지시킨다.Therefore, when the pressure switch SW reaches a predetermined pressure or more, the operation of the compressor 12 is stopped by switching off the power supply.
상기에서 초기운전은 압축기(12)가 기동하여 초기 목표 운전주파수에 이르고 찬바람의 토출을 방지하기 위하여 실내배관온도가 34℃이상이 되어 실내팬을 운전시킬때 까지의 운전구간을 말한다.In the above-described initial operation, the compressor 12 starts to reach an initial target operating frequency, and the operation interval until the indoor fan is operated when the indoor piping temperature becomes 34 ° C. or more in order to prevent discharge of cold wind.
여기서, 도2에서 보는 바와같이 초기 목표 운전주파수로 운전할 때 압축기(12)의 토출압력은 외기 온도에 비례하여 증가하는데, 만일 사용자가 난방 과부하 조건(실외온도:21℃,실내온도:27℃)에 가까운 온도조건에서 난방운전을 수행할 때 빈번하게 압력스위치(SW)가 작동되어 히트펌프의 기동이 중단되게 된다.Here, as shown in FIG. 2, when operating at the initial target operating frequency, the discharge pressure of the compressor 12 increases in proportion to the outside air temperature, and if the user is under heating overload condition (outdoor temperature: 21 ° C, indoor temperature: 27 ° C) When the heating operation is performed at a temperature close to the pressure switch (SW) is frequently operated to stop the start of the heat pump.
즉, 상술한 바와같이 종래에는 실내 배관온도가 적정온도에 도달할 때까지 실내팬을 동작시키지 않게 되어 압축기 및 사방변등에 상당한 압력이 가해지게 되어 부품의 손상을 초래하게 되고, 이를 방지하기 위하여 압력스위치를 장착하여 일정 압력이상이 걸리게 되면 전원을 차단하여 압축기의 운전을 정지시키지만 사용자가 난방과부하조건에 가까운 온도조건에서 난방운전을 할 경우 빈번하게 그 압력스위치가 작동되어 사용자의 클레임의 발생 원인이 됨과 아울러 과도한 압력상승으로 압축기 및 사방변등의 부품의 손상되는 문제점이 있었다.That is, as described above, the indoor fan is not operated until the indoor piping temperature reaches an appropriate temperature, so that a considerable pressure is applied to the compressor and the four sides, resulting in damage to the parts, and to prevent the pressure. If a certain pressure is exceeded by mounting a switch, the power is cut off to stop the operation of the compressor.However, if the user operates the heating at a temperature close to the heating and overload condition, the pressure switch is frequently operated to cause the user's claim. In addition, there was a problem of damage to parts such as compressor and all four sides due to excessive pressure rise.
따라서, 상기와 같은 문제점을 감안하여 창안한 본 발명은 난방과부하조건 근방에서 난방운전시 적정 토출압력에서 압축기가 안정적으로 동작할 수 있도록 한 인버터 히트펌프의 난방과부한 운전 제어장치및 방법을 제공함에 그 목적이 있다.Accordingly, the present invention devised in view of the above problems provides a control device and method for heating overload operation of an inverter heat pump that enables the compressor to be stably operated at a proper discharge pressure during heating operation near a heating overload condition. The purpose is.
도1은 종래 인버터 히트펌프의 난방 과부하 운전 제어장치에 대한 구성을 보인 블록도.1 is a block diagram showing a configuration for a heating overload operation control apparatus of a conventional inverter heat pump.
도2는 도1에 있어서, 토출압력과 초기 목표 운전주파수에 따른 관계를 보인도.FIG. 2 is a diagram showing the relationship between the discharge pressure and the initial target operating frequency in FIG. 1; FIG.
도3은 본 발명 인버터 히트펌프의 난방 과부하 운전 제어장치에 대한 구성을 보인 블록도.Figure 3 is a block diagram showing the configuration for the heating overload operation control apparatus of the present invention inverter heat pump.
도4는 본 발명 인버터 히트펌프의 난방 과부하 운전 제어방법에 대한 동작 흐름도.Figure 4 is an operation flowchart of the heating overload operation control method of the inverter heat pump of the present invention.
도5는 본 발명이 적용되는 인버터 히트펌프의 개략도.5 is a schematic view of an inverter heat pump to which the present invention is applied.
도6은 도3에 있어서, 토출압력과 초기 목표 운전주파수에 따른 관계를 보인도.FIG. 6 is a diagram showing the relationship between the discharge pressure and the initial target operating frequency in FIG.
도7은 도3에 있어서, 각각의 실외온도에 따른 초기 목표운전주파수를 보인도.7 is a view showing the initial target operating frequency according to each outdoor temperature in FIG.
*****도면의 주요부분에 대한 부호의 설명********** Description of the symbols for the main parts of the drawings *****
10:교류/직류변환부 11:인버터부10: AC / DC converter 11: Inverter
12:압축기 13:제어부12: compressor 13: control unit
14:실외온도센서14: outdoor temperature sensor
상기와 같은 목적을 달성하기 위한 본 발명은 입력전원을 직류전원으로 변환하는 교류/직류변환부와; 초기 운전시 실외온도를 감지하는 실외온도센서와; 초기 운전시 상기 실외온도센서의 감지값에 따라 초기 목표 운전주파수를 결정하여 그 운전주파수에 따른 펄스폭 변조신호를 출력하고, 실내배관온도가 설정온도가 되면 초기운전을 종료하고 실내외 부하상태에 따른 펄스폭변조신호를 출력하는 제어부와; 상기 교류/직류변환부로부터 직류전원을 입력받아 이를 상기 펄스폭변조신호에 의해 스위칭하여 3상으로 가변하여 출력하는 인버터부와; 상기 인버터부의 출력신호에 따라 구동되는 압축기와; 상기 압축기의 구동압력이 설정 압력 이상이면 입력전원을 차단하는 압력스위치를 포함하여 구성한 것을 특징으로 한다.The present invention for achieving the above object is an AC / DC conversion unit for converting the input power to DC power; An outdoor temperature sensor for detecting an outdoor temperature during initial operation; During the initial operation, the initial target operation frequency is determined according to the detected value of the outdoor temperature sensor, and the pulse width modulation signal is output according to the operation frequency. When the indoor piping temperature reaches the set temperature, the initial operation is terminated and A control unit for outputting a pulse width modulation signal; An inverter unit for receiving a DC power from the AC / DC converter and switching it by the pulse width modulated signal to change the output into three phases; A compressor driven according to an output signal of the inverter unit; When the drive pressure of the compressor is greater than the set pressure is characterized in that it comprises a pressure switch for shutting off the input power.
상기와 같은 목적을 달성하기 위한 본 발명은 난방 운전 시작키가 입력되면 초기 운전시 실외팬을 운전시킨후 실외온도센서를 통해 실외온도를 감지하여 그 실외온도가 소정온도 이상인지를 판단하는 제1 단계와; 상기 제1 단계의 판단결과 실외온도가 소정 온도이면 그 실외온도에 해당되는 초기 목표 운전주파수로 압축기를 운전시킨후 실내배관온도가 설정 온도에 도달하였는지를 판단하는 제2 단계와; 상기 제2 단계의 판단결과 실내배관온도가 설정 온도에 도달하면 실내팬을 동작시켜 초기 운전을 종료한 다음 실내외 부하상태에 따라 정상운전을 수행하는 제3 단계로 수행함을 특징으로 한다.In order to achieve the above object, the present invention provides a first method for determining whether the outdoor temperature is above a predetermined temperature by sensing an outdoor temperature through an outdoor temperature sensor after driving an outdoor fan during initial operation when a heating operation start key is input. Steps; A second step of determining whether the indoor piping temperature reaches a set temperature after operating the compressor at an initial target operating frequency corresponding to the outdoor temperature if the outdoor temperature is a predetermined temperature as a result of the determination in the first step; As a result of the determination of the second step, when the indoor piping temperature reaches the set temperature, the indoor fan is operated to terminate the initial operation, and then perform the third step of performing normal operation according to the indoor and outdoor load conditions.
이하, 본 발명에 의한 인버터 히트펌프의 난방 과부한 운전 제어장치및 방법에 대한 작용및 효과를 첨부한 도면을 참조하여 상세히 설명한다.Hereinafter, with reference to the accompanying drawings, the operation and effects of the heating overload operation control apparatus and method of the inverter heat pump according to the present invention will be described in detail.
도3은 본 발명 인버터 히트펌프의 난방 과부하 운전 제어장치에 대한 구성을 보인 블록도로서, 입력전원(AC)을 직류전원으로 변환하는 교류/직류변환부(10)와; 초기 운전시 실외온도를 감지하는 실외온도센서(14)와; 초기 운전시 상기 실외온도센서(14)의 감지값에 따라 초기 목표 운전주파수를 결정하여 그 운전주파수에 따른 펄스폭 변조신호를 출력하고, 실내배관온도가 설정온도가 되면 초기운전을 종료하고 실내외 부하상태에 따른 펄스폭 변조신호를 출력하는 제어부(13)와; 상기 교류/직류변환부(10)로부터 직류전원을 입력받아 이를 상기 펄스폭 변조신호에 의해 스위칭하여 3상으로 가변하여 출력하는 인버터부(11)와; 상기 인버터부(11)의 출력신호에 따라 구동되는 압축기(12)와; 상기 압축기(12)의 구동압력이 설정 압력 이상이면 입력전원(AC)을 차단하는 압력스위치(SW)를 구비한다.Figure 3 is a block diagram showing the configuration of the heating overload operation control apparatus of the inverter heat pump of the present invention, and the AC / DC converter 10 for converting the input power (AC) to a direct current power; An outdoor temperature sensor 14 for detecting an outdoor temperature during initial operation; During the initial operation, the initial target operation frequency is determined according to the detected value of the outdoor temperature sensor 14, and the pulse width modulation signal is output according to the operation frequency. When the indoor piping temperature reaches the set temperature, the initial operation is terminated and the indoor / outdoor load is terminated. A control unit 13 for outputting a pulse width modulated signal according to a state; An inverter unit (11) for receiving a DC power from the AC / DC converter (10) and switching it by the pulse width modulation signal to change the output into three phases; A compressor 12 driven according to the output signal of the inverter unit 11; When the driving pressure of the compressor 12 is equal to or higher than the set pressure, a pressure switch SW for shutting off the input power AC is provided.
도4는 본 발명 인버터 히트펌프의 난방 과부하 운전 제어방법에 대한 동작흐름도로서, 이에 도시한 바와같이 난방 운전 시작키가 입력되면 초기 운전시 실외팬을 운전시킨후 실외온도센서(14)를 통해 실외온도를 감지하여 그 실외온도가 소정온도 이상인지를 판단하는 제1 단계와; 상기 제1 단계의 판단결과 실외온도가 소정 온도이면 그 실외온도에 해당되는 초기 목표 운전주파수로 압축기(12)를 운전시킨후 실내배관온도가 설정 온도에 도달하였는지를 판단하는 제2 단계와; 상기 제2 단계의 판단결과 실내배관온도가 설정 온도에 도달하면 실내팬을 동작시켜 초기 운전을 종료한 다음 실내외 부하상태에 따라 정상 운전을 수행하는 제3 단계로 이루어지며, 이와같은 본 발명의 동작을 설명한다.4 is a flowchart illustrating a method for controlling the heating overload operation of the inverter heat pump according to the present invention. As shown in FIG. 4, when the heating operation start key is input, the outdoor fan is operated outdoors during the initial operation after the outdoor temperature sensor 14 is operated. Detecting a temperature to determine whether the outdoor temperature is equal to or greater than a predetermined temperature; A second step of determining whether the indoor piping temperature reaches a set temperature after operating the compressor 12 at an initial target operating frequency corresponding to the outdoor temperature if the outdoor temperature is a predetermined temperature as a result of the determination in the first step; As a result of the determination of the second step, when the indoor piping temperature reaches the set temperature, the indoor fan is operated to terminate the initial operation, and then the third step of performing normal operation according to the indoor and outdoor load conditions. Explain.
먼저, 일반적인 동작은 종래와 동일하다. 즉, 교류/직류변환부(10)는 입력전원(AC)을 입력받아 이를 변환하여 직류전압으로 변환하고, 제어부(13)는 초기 목표운전주파수에 따른 펄스폭 변조신호를 인버터부(11)에 인가하며, 그러면 인버터부 (11)는 상기 교류/직류변환부(10)의 직류전압을 입력받아 이를 상기 제어부(13)의 펄스폭 변조신호에 의해 스위칭하여 3상으로 가변된 교류전압을 압축기(12)에 인가한다.First, the general operation is the same as in the prior art. That is, the AC / DC converter 10 receives an input power source AC and converts it into a DC voltage, and the controller 13 transmits a pulse width modulated signal according to the initial target driving frequency to the inverter unit 11. Then, the inverter unit 11 receives the DC voltage of the AC / DC converter 10 and switches it by the pulse width modulation signal of the controller 13 to convert the AC voltage which is changed into three phases. 12).
이에 따라, 상기 압축기(12)는 구동되어 소정 압력을 토출하는데, 만약 상기 압축기(12)의 토출압력이 설정 압력이상이 되면 전원이 차단되도록 압력스위치(SW)가 스위칭된다.Accordingly, the compressor 12 is driven to discharge a predetermined pressure. If the discharge pressure of the compressor 12 is greater than or equal to the set pressure, the pressure switch SW is switched so that the power is cut off.
이때, 본 발명은 제어부(13)가 실외온도센서(14)를 통해 감지되는 실외온도값에 따라 적합한 초기 목표운전수를 결정하여 그 주파수 만큼만 압축기(12)를 구동시키면서 초기운전을 종료하도록 제어한다.In this case, the present invention controls the controller 13 to terminate the initial operation while driving the compressor 12 only by the frequency by determining the appropriate initial target driver according to the outdoor temperature value detected by the outdoor temperature sensor 14.
즉, 도6에서 보는 바와같이 실외온도에 따른 토출압력을 압력스위치(SW)가 작동하는 압력 이하로 제어함으로써 난방 과부하 조건에서의 난방운전시, 초기운전을 과도한 압력 상승없이 수행할 수 있게 된다.That is, as shown in Figure 6 by controlling the discharge pressure according to the outdoor temperature below the pressure operating the pressure switch (SW), during the heating operation under heating overload conditions, it is possible to perform the initial operation without excessive pressure rise.
다시 말하면, 난방 운전키가 입력되어 운전이 시작되면, 초기 운전을 수행하게 되고, 그 초기 운전이 종료되면 제어부(13)는 실내외 부하 상태에 따라 주파수를 가변하도록 하는 펄스폭 변조신호를 출력한다.In other words, when the heating operation key is input and the operation is started, the initial operation is performed. When the initial operation is terminated, the controller 13 outputs a pulse width modulation signal for varying the frequency according to the indoor and outdoor load conditions.
그러면, 인버터부(11)가 교류/직류변환부(10)의 직류전압을 입력받아 이를 상기 제어부(13)의 펄스폭 변조신호에 의해 스위칭하여 3상으로 가변된 교류전압을 압축기(12)에 인가하여 정상운전을 수행하게 된다.Then, the inverter unit 11 receives the DC voltage of the AC / DC converter 10 and switches it by the pulse width modulation signal of the control unit 13 to convert the AC voltage which is changed into three phases to the compressor 12. Normal operation will be performed by applying
상술한 바와같이, 상기 제어부(13)는 초기 운전시 실외팬이 구동된후 실외온도센서(14)를 통해 감지되는 실외온도에 따라 초기 목표 운전주파수를 도7과 같이 결정하여 그에 따라 압축기(12)의 구동을 제어하게 된다.As described above, the controller 13 determines the initial target operating frequency as shown in FIG. 7 according to the outdoor temperature detected by the outdoor temperature sensor 14 after the outdoor fan is driven during initial operation, and accordingly the compressor 12 ) To control the driving.
이후, 실내배관온도가 34℃가 되면 실내팬을 구동시킨후 초기 운전을 종료한 다음, 실내외 부하 상태에 따라 주파수를 가변하면서 정상 운전상태로 들어가게 된다.Thereafter, when the indoor piping temperature reaches 34 ° C., the indoor fan is driven and the initial operation is ended, and then the frequency is varied according to the indoor and outdoor load conditions to enter the normal operation state.
여기서, 도5는 본 발명이 적용되는 인버터 히트펌프의 실시예에 대한 개략도이다.5 is a schematic diagram of an embodiment of an inverter heat pump to which the present invention is applied.
이상에서 상세히 설명한 바와같이 본 발명은 난방 과부하 조건(실외온도:21℃,실내온도:27℃)에서의 난방 운전시에도 적정 토출 압력으로 운전하여 부품의 손상을 방지하고 고객의 클레임에 적절하게 대응할 수 있는 효과가 있다.As described in detail above, the present invention operates at an appropriate discharge pressure even when heating is operated under heating overload conditions (outdoor temperature: 21 ° C, room temperature: 27 ° C) to prevent damage to components and to properly respond to customer's claims. It can be effective.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR100797610B1 (en) * | 2006-11-02 | 2008-01-23 | 주식회사 대우일렉트로닉스 | Heating overload detecting and control method of heat-pump compring electronic expansion valve |
| RU2598867C2 (en) * | 2013-12-27 | 2016-09-27 | Мицубиси Электрик Корпорейшн | Air conditioning unit and method of controlling air conditioner |
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| KR102110536B1 (en) * | 2018-06-21 | 2020-05-28 | 엘지전자 주식회사 | Compressor driving device and air conditioner including the same |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR100797610B1 (en) * | 2006-11-02 | 2008-01-23 | 주식회사 대우일렉트로닉스 | Heating overload detecting and control method of heat-pump compring electronic expansion valve |
| RU2598867C2 (en) * | 2013-12-27 | 2016-09-27 | Мицубиси Электрик Корпорейшн | Air conditioning unit and method of controlling air conditioner |
| US9696045B2 (en) | 2013-12-27 | 2017-07-04 | Mitsubishi Electric Corporation | Air conditioner and control method of air conditioner |
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