KR20040012348A - A driving control method of inverter air- conditioner - Google Patents

A driving control method of inverter air- conditioner Download PDF

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Publication number
KR20040012348A
KR20040012348A KR1020020045890A KR20020045890A KR20040012348A KR 20040012348 A KR20040012348 A KR 20040012348A KR 1020020045890 A KR1020020045890 A KR 1020020045890A KR 20020045890 A KR20020045890 A KR 20020045890A KR 20040012348 A KR20040012348 A KR 20040012348A
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South Korea
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compressor
operating frequency
expansion valve
outdoor air
opening value
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KR1020020045890A
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Korean (ko)
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정종남
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엘지전자 주식회사
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Priority to KR1020020045890A priority Critical patent/KR20040012348A/en
Publication of KR20040012348A publication Critical patent/KR20040012348A/en

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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00Control or safety arrangements
    • F24F11/88Electrical aspects, e.g. circuits
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00Control or safety arrangements
    • F24F11/70Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/86Control 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
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2140/00Control inputs relating to system states
    • F24F2140/20Heat-exchange fluid temperature

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

Abstract

PURPOSE: A method for controlling operation of an inverter air conditioner is provided to control operation frequency of a compressor and opening degree of an expansion valve depending on temperature of outdoor air. CONSTITUTION: A method includes the steps of: a step setting operating frequency of a compressor and opening degree of an expansion valve depending on temperature of outdoor air; a step measuring temperature of outdoor air; a step driving the compressor at minimum operating frequency depending on the temperature of outdoor air when power is impressed; a step gradually controlling the expansion valve from maximum opening degree to reference opening degree by falling degree variable depending on the temperature of outdoor air to reduce discharge pressure of refrigerant compressed by driving of the compressor; and a step variably controlling rising degree of operating frequency of the compressor depending on the measured temperature of outdoor air so that the operating frequency of the compressor is gradually increased from minimum operating frequency to reference operating frequency.

Description

인버터공기조화기의 운전제어방법{A driving control method of inverter air- conditioner}A driving control method of inverter air conditioner

본 발명은 공기조화기에 관한 것으로, 더욱 상세하게는 압축기주파수와 팽창밸브의 개도값을 제어하는 인버터공기조화기의 운전제어방법에 관한 것이다.The present invention relates to an air conditioner, and more particularly, to an operation control method of an inverter air conditioner for controlling a compressor frequency and an opening value of an expansion valve.

일반적으로 공기조화기는 사용자 요구에 의해서 난방 사이클 및 냉방 사이클을 구동하고, 상기 난방 사이클의 운전에 의해서 더운 여름에 실내를 시원하게 조성한다. 또한 공기조화기는 실내의 습도를 조절하며, 실내공기를 쾌적한 청정상태로 조절한다.In general, an air conditioner drives a heating cycle and a cooling cycle at the request of the user, and cools the room in the hot summer by the operation of the heating cycle. In addition, the air conditioner controls the humidity in the room, and controls the indoor air to a comfortable clean state.

이와 같이 구성되는 공기조화기의 순환 사이클은, 실내측의 열교환기가 응축기의 기능을 담당할 때 난방 사이클로 구성되고, 실내측의 열교환기가 증발기의 기능을 담당할 때 냉방사이클을 구성하게 된다.The circulation cycle of the air conditioner configured as described above consists of a heating cycle when the indoor heat exchanger functions as a condenser, and constitutes a cooling cycle when the indoor heat exchanger functions as an evaporator.

도 1은 일반적인 공기조화기의 냉/난방 사이클의 간략도이다.1 is a schematic diagram of a cooling / heating cycle of a general air conditioner.

상기 난방 사이클에 의한 난방운전은, 먼저 압축기(3)에서 냉매를 압축한다. 압축된 냉매는 실내 열교환기(1)로 전달된다. 이때, 실내 열교환기(1)에 흐르는 냉매가 실내 측으로 열을 방출하여, 실내측으로 따뜻한 바람이 토출된다. 그리고 상기 실내 열교환기(1)를 통과한 냉매는 팽창밸브(4)를 통해서 실외 열교환기(2)로 흡입된다. 이때, 상기 실외 열교환기(2)가 증발 동작을 수행하여 차가운 바람을 실외로 토출시킨다.In the heating operation by the heating cycle, the compressor 3 first compresses the refrigerant. The compressed refrigerant is delivered to the indoor heat exchanger (1). At this time, the refrigerant flowing in the indoor heat exchanger 1 discharges heat to the indoor side, and warm wind is discharged to the indoor side. And the refrigerant passing through the indoor heat exchanger (1) is sucked into the outdoor heat exchanger (2) through the expansion valve (4). At this time, the outdoor heat exchanger (2) performs the evaporation operation to discharge the cold wind to the outside.

한편, 냉방 사이클에 의한 냉방 운전은, 먼저 압축기(3)에서 냉매를 압축한다. 상기 압축된 냉매는 실외 열교환기(2)로 전달된다. 실외 열교환기(2)는 전달된 냉매를 응축하고, 응축된 냉매는 팽창밸브(4)를 통해서 실내 열교환기(1)로 전달시킨다. 따라서 실내 열교환기(1)가 구동됨에 따라, 냉매가 실내 공기의 열을 흡수하여, 실내측으로 차가운 바람이 토출된다.On the other hand, in the cooling operation by a cooling cycle, the compressor 3 first compresses a refrigerant | coolant. The compressed refrigerant is delivered to the outdoor heat exchanger (2). The outdoor heat exchanger 2 condenses the delivered refrigerant, and the condensed refrigerant is transferred to the indoor heat exchanger 1 through the expansion valve 4. Therefore, as the indoor heat exchanger 1 is driven, the refrigerant absorbs heat of indoor air, and cold wind is discharged to the indoor side.

이때, 상기 팽창밸브(4)는 실내 열교환기(1)와 실외 열교환기(2) 사이에 연결되어, 냉매가 일정한 비율로 흐르도록 조절하는 기능을 수행한다. 즉, 초기 운전조건에서는 팽창밸브(4)의 개도값이 크게 열려, 열교환된 냉매가 많이 흐르도록제어하고, 소정시간 동안 팽창밸브(4)의 개도값이 적어져, 결과적으로 설정된 개도값에 도달하여 냉매가 일정한 비율로 흐르도록 제어한다. 또한, 압축기(3)는 냉매를 압축하는데, 초기 운전조건에서부터 운전주파수가 단계적으로 상승하여, 소정시간이 경과하면 설정된 기준 운전주파수에 도달한다.At this time, the expansion valve (4) is connected between the indoor heat exchanger (1) and the outdoor heat exchanger (2), and performs a function to control the refrigerant flows at a constant rate. That is, in the initial operation condition, the opening value of the expansion valve 4 is greatly opened, so that a large amount of heat exchanged refrigerant flows, and the opening value of the expansion valve 4 decreases for a predetermined time, resulting in reaching the set opening value. To control the refrigerant to flow at a constant rate. In addition, the compressor 3 compresses the refrigerant, and the operating frequency rises step by step from the initial operating condition, and reaches a set reference operating frequency when a predetermined time elapses.

상기와 같이 팽창밸브(4)와 압축기(3)가 구동하는데 있어서, 팽창밸브(4)의 개도값과 압축기(3)의 운전주파수는 다음과 같이 제어된다.In driving the expansion valve 4 and the compressor 3 as described above, the opening value of the expansion valve 4 and the operating frequency of the compressor 3 are controlled as follows.

도 2는 종래 기술에 따른 인버터공기조화기의 팽창밸브(4)의 개도값과 압축기(3)의 운전주파수 상태도이다.2 is a state diagram of an opening value of an expansion valve 4 and an operating frequency of the compressor 3 of the inverter air conditioner according to the related art.

인버터공기조화기로 전원이 인가되면, 압축기(3)가 구동을 시작하여 냉매를 압축한다. 압축된 냉매는 실외 열교환기(2)로 전달되고, 실외 열교환기(2)로 전달된 냉매는 팽창밸브(4)에 전달된다. 상기 팽창밸브(4)는 압축된 냉매가 일정한 양으로 실내 열교환기(1)로 공급되도록 개도값을 제어한다.When power is applied to the inverter air conditioner, the compressor 3 starts driving to compress the refrigerant. The compressed refrigerant is delivered to the outdoor heat exchanger 2, and the refrigerant delivered to the outdoor heat exchanger 2 is delivered to the expansion valve 4. The expansion valve 4 controls the opening value so that the compressed refrigerant is supplied to the indoor heat exchanger 1 in a constant amount.

즉, 도면에 도시된 바와 같이, 인버터공기조화기가 초기 구동시에는 40초 동안 압축기(3)의 운전주파수가 2HZ로 운전하고, 동시에 압축기(3)의 구동으로 인해 압축된 냉매가 팽창밸브(4)로 공급된다. 이때, 상기 팽창밸브(4)는 30초 동안 최대로 열린 상태에서 냉매를 통과시킨다.That is, as shown in the figure, when the inverter air conditioner is initially driven, the operating frequency of the compressor 3 is operated at 2HZ for 40 seconds, and at the same time, the refrigerant compressed by the drive of the compressor 3 is expanded by the expansion valve 4. Is supplied. At this time, the expansion valve (4) passes through the refrigerant in the maximum open state for 30 seconds.

상기 팽창밸브(4)의 개도값이 최대인 초기 구동시에는, 압축기(3)의 운전주파수에 따른 냉매가 공급되어도 팽창밸브(4)가 최대 개도값으로 열려, 냉매를 압축하는 압축기(3)의 압력이 증가하지 않는다.In the initial driving at which the opening value of the expansion valve 4 is maximum, the compressor 3 opens the expansion valve 4 to the maximum opening value even when the refrigerant according to the operating frequency of the compressor 3 is supplied, thereby compressing the refrigerant. Does not increase the pressure.

한편, 압축기(3)의 구동이 40초가 경과하면, 60초 동안 압축기(3)는 다음과같은 운전 주파수식으로 제어된다.On the other hand, when the driving of the compressor 3 has elapsed for 40 seconds, the compressor 3 is controlled in the following operating frequency formula for 60 seconds.

[식1a][Equation 1a]

상기와 같은 운전주파수로 압축기(3)가 60초 동안 구동하고, 동시에 압축기(3) 구동으로 인해서 압축된 냉매는 팽창밸브(4)로 공급된다. 이때, 상기 팽창밸브(4)의 개도값은 초기 기동시 개도값보다 더 작다. 상기 팽창밸브(4)의 개도값은 70초 동안 1.5×pb의 개도값으로 도달하도록 닫히면서 냉매를 배출한다.The compressor 3 is driven for 60 seconds at the operation frequency as described above, and at the same time, the refrigerant compressed by the compressor 3 is supplied to the expansion valve 4. At this time, the opening value of the expansion valve 4 is smaller than the opening value at the initial start. The opening value of the expansion valve 4 is closed to reach the opening value of 1.5 x pb for 70 seconds while discharging the refrigerant.

그리고 압축기(3)의 구동시간이 60초를 경과하면, 압축기(3)의 운전주파수는 전 단계보다 더 많이 상승하지만, 팽창밸브(4)의 개도값은 더 작은 개도값으로 진행한다. 즉, 압축기(3)는 다음과 같은 운전주파수 식으로 구동한다.When the driving time of the compressor 3 passes 60 seconds, the operating frequency of the compressor 3 rises more than the previous stage, but the opening value of the expansion valve 4 proceeds to a smaller opening value. That is, the compressor 3 is driven by the following operating frequency equation.

[식2a][Equation 2a]

상기와 같은 운전주파수로 압축기(3)가 60초동안 구동하고, 동시에 압축기(3)의 구동으로 인해서 압축된 냉매는 팽창밸브(4)로 공급된다. 이때, 상기 팽창밸브(4)의 개도값은 전 단계보다 더 적은 개도값이 된다. 즉, 상기 팽창밸브(4)의 개도값은 1.2×pb의 개도값으로 60초 동안 닫히면서 냉매를 배출한다.At the same operating frequency, the compressor 3 is driven for 60 seconds, and at the same time, the refrigerant compressed by the drive of the compressor 3 is supplied to the expansion valve 4. At this time, the opening value of the expansion valve 4 is smaller than the previous step. That is, the opening value of the expansion valve 4 is closed for 60 seconds at an opening value of 1.2 x pb to discharge the refrigerant.

그리고 60초가 경과하면, 압축기(3)의 운전주파수는 전 단계보다 더 많이 상승하여 기준주파수(Fb)에 도달하고, 상기 기준주파수로 계속 구동된다. 그리고 팽창밸브(4)의 개도값은 전 단계보다 더 적게 열려 기준 개도값(1.0×pb)에 도달하게된다.When 60 seconds have elapsed, the operating frequency of the compressor 3 rises more than the previous stage, reaches the reference frequency Fb, and continues to operate at the reference frequency. The opening value of the expansion valve 4 is less open than in the previous step to reach the reference opening value (1.0 x pb).

상기와 같이 기준주파수로 압축기(3)가 구동됨과 동시에 압축된 냉매가 팽창밸브(4)로 유입될 때, 상기 팽창밸브(4)의 개도값이 기준 개도값에 도달함에 따라 안정적으로 냉매의 유출입이 조절될 수 있도록 한다.As described above, when the compressor 3 is driven at the reference frequency and the compressed refrigerant flows into the expansion valve 4, the coolant flows out stably as the opening value of the expansion valve 4 reaches the reference opening value. This can be adjusted.

이때, 상기와 같이 압축기(3)의 운전주파수가 구동되는데 있어서, 주파수 상승속도가 실내외 전 온도범위에 대해서 현재 압축기(3)의 운전주파수가 50hz이하이면, 목표주파수를 향하여 1초당 1hz 상승하고, 현재주파수가 50hz이상이면 2초당 1hz상승하게 설계되었다. 즉, 실내/외 온도변화 유무에 관계없이 압축기(3)의 현재 운전주파수 측정값만으로 압축기(3)의 운전주파수 증가치를 제어하였다.At this time, when the operating frequency of the compressor (3) is driven as described above, if the operating frequency of the current compressor (3) is less than 50hz for the entire indoor and outdoor temperature range, 1hz per second rises toward the target frequency, If the current frequency is more than 50hz, it is designed to increase 1hz every 2 seconds. That is, the operating frequency increase value of the compressor 3 is controlled only by the current operating frequency measurement value of the compressor 3 regardless of whether the indoor / outdoor temperature changes.

그러나 실외 공기온도가 고온인 경우, 압축기 구동에 따른 전류가 상승하게 된다. 그리고, 실외기 내에 구성된 부품온도가 상승되면, 본체에 흐르는 전류가 증가하게 된다.However, when the outdoor air temperature is a high temperature, the current due to the compressor driving is increased. Then, when the component temperature configured in the outdoor unit is increased, the current flowing in the main body increases.

또한, 실외 공기온도 변화에 상관없이 전자팽창밸브의 개도값 제어가 항상 동일하여, 실외 공기온도가 고온인 경우, 토출되는 냉매로 인한 압력상승으로 인해서 전류폭주가 발생되는 문제점이 있었다.In addition, regardless of the change in the outdoor air temperature, the opening value control of the electronic expansion valve is always the same, and when the outdoor air temperature is a high temperature, there is a problem that a current runaway occurs due to the pressure rise due to the discharged refrigerant.

따라서 본 발명의 목적은 실외 공기온도에 따라, 인버터공기조화기의 압축기의 운전주파수와 팽창밸브의 개도값을 제어하는 인버터공기조화기의 운전제어방법을 제공함에 있다.Accordingly, an object of the present invention is to provide an operation control method of an inverter air conditioner that controls the operating frequency of the compressor of the inverter air conditioner and the opening value of the expansion valve according to the outdoor air temperature.

도 1은 일반적인 공기조화기의 냉/난방 사이클.1 is a cooling / heating cycle of a typical air conditioner.

도 2는 종래 기술에 따른 인버터공기조화기의 팽창밸브의 개도값과 운전주파수의 제어상태도.Figure 2 is a control state diagram of the opening value and operating frequency of the expansion valve of the inverter air conditioner according to the prior art.

도 3은 본 발명에 따른 인버터공기조화기의 팽창밸브의 개도값과 운전주파수의 제어상태도.3 is a control state diagram of the opening value and the operating frequency of the expansion valve of the inverter air conditioner according to the present invention.

* 도면의 주요 부분에 대한 부호의 설명 *Explanation of symbols on the main parts of the drawings

1 : 실내 열교환기2 : 실외 열교환기1: indoor heat exchanger 2: outdoor heat exchanger

3 : 압축기4 : 팽창밸브3: compressor 4: expansion valve

상기 목적을 달성하기 위한 본 발명에 따른 인버터공기조화기의 운전제어방법은, 실외 공기온도에 따라, 압축기의 운전주파수 및 팽창밸브의 개도값을 설정하는 단계와; 실외 공기온도를 측정하는 단계와; 전원이 인가되면, 실외 공기온도에 따라 압축기가 최소운전주파수로 구동하는 단계와; 상기 압축기의 구동으로 압축된 냉매의 토출압력을 저감시키기 위해서, 실외 공기온도에 따라 하강폭을 가변조절해서 팽창밸브를 최대값에서 기준개도값으로 단계적으로 제어하는 단계와; 압축기의 운전주파수가 최소운전주파수에서 기준 운전주파수까지 단계적으로 증가하도록, 측정된 실외 공기온도에 따라 압축기의 운전주파수 상승폭을 가변조절하는 단계를 포함하여 구성된다.Operation control method of the inverter air conditioner according to the present invention for achieving the above object, the step of setting the operating frequency of the compressor and the opening value of the expansion valve according to the outdoor air temperature; Measuring the outdoor air temperature; When the power is applied, driving the compressor at the minimum operating frequency according to the outdoor air temperature; Controlling the expansion valve step by step from a maximum value to a reference opening value by varying a drop width in accordance with outdoor air temperature in order to reduce the discharge pressure of the refrigerant compressed by the driving of the compressor; And variably adjusting the operating frequency rise of the compressor according to the measured outdoor air temperature so that the operating frequency of the compressor increases step by step from the minimum operating frequency to the reference operating frequency.

이하 본 발명에 따른 인버터공기조화기의 운전제어방법에 대해 상세하게 살펴보면 다음과 같다.Hereinafter, the operation control method of the inverter air conditioner according to the present invention will be described in detail.

도 3은 본 발명에 따른 인버터공기조화기의 팽창밸브의 개도값과 운전주파수의 제어상태도이다.3 is a control state diagram of an opening value and an operating frequency of an expansion valve of an inverter air conditioner according to the present invention.

인버터공기조화기에 전원이 인가되고 도면에 도시된 바와 같이, 실외 공기온도가 41도 이하이면, 팽창밸브의 개도값과 압축기의 운전주파수는 다음과 같이 구동된다.When power is supplied to the inverter air conditioner and as shown in the figure, when the outdoor air temperature is 41 degrees or less, the opening value of the expansion valve and the operating frequency of the compressor are driven as follows.

도시된 바와 같이, 인버터공기조화기 본체로 전원이 인가되고, 압축기(3)가 구동을 시작하여 냉매를 압축한다. 압축된 냉매는 실외 열교환기(2)로 전달되고, 상기 실외 열교환기(2)로 전달된 냉매는 팽창밸브(4)에 전달된다. 상기 팽창밸브(4)는 압축된 냉매가 일정한 양으로 실내 열교환기(1)로 공급되도록 개도값을 제어한다.As shown, power is applied to the inverter air conditioner body, and the compressor 3 starts to drive to compress the refrigerant. The compressed refrigerant is delivered to the outdoor heat exchanger 2, and the refrigerant delivered to the outdoor heat exchanger 2 is delivered to the expansion valve 4. The expansion valve 4 controls the opening value so that the compressed refrigerant is supplied to the indoor heat exchanger 1 in a constant amount.

즉, 도 3에 도시된 바와 같이, 인버터공기조화기가 초기 구동시에는, 40초 동안 압축기(3)의 운전주파수가 25hz로 운전하고, 동시에 압축기(3)의 구동으로 인해 압축된 냉매가 팽창밸브(4)로 공급된다. 이때, 상기 팽창밸브(4)는 30초 동안 최대로 열린 상태에서 냉매를 통과시킨다.That is, as shown in FIG. 3, when the inverter air conditioner is initially driven, the operating frequency of the compressor 3 is operated at 25 hz for 40 seconds, and at the same time, the refrigerant compressed by the driving of the compressor 3 is expanded. It is supplied to (4). At this time, the expansion valve (4) passes through the refrigerant in the maximum open state for 30 seconds.

상기 팽창밸브(4)의 개도값이 최대인 초기 구동시에는, 압축기(3)의 운전주파수에 따른 냉매가 공급되어도 팽창밸브(4)가 최대 개도값으로 열려져, 팽창밸브(4)로 고온고압의 냉매가 안정적으로 공급된다. 또한, 냉매를 압축하는 압축기(3)의 압력이 증가하지 않는다.In the initial driving at which the opening value of the expansion valve 4 is maximum, the expansion valve 4 is opened to the maximum opening value even when the refrigerant according to the operating frequency of the compressor 3 is supplied, so that the expansion valve 4 has a high temperature and high pressure. Coolant is stably supplied. In addition, the pressure of the compressor 3 for compressing the refrigerant does not increase.

한편, 압축기(3)의 구동이 40초가 경과하면, 압축기(3)는 다음과 같은 운전주파수 식으로 60초 동안 구동제어된다.On the other hand, when the drive of the compressor 3 has elapsed for 40 seconds, the compressor 3 is drive controlled for 60 seconds by the following operating frequency formula.

[식1b][Equation 1b]

상기와 같은 운전주파수로 압축기(3)가 60초 동안 구동하고, 동시에 압축기(3) 구동으로 인해서 압축된 냉매는 팽창밸브(4)로 공급된다. 이때, 상기 팽창밸브(4)의 개도값은 초기 기동시 개도값보다 더 작다. 상기 팽창밸브(4)의 개도값은 70초 동안 1.5×pb의 개도값으로 도달하도록 닫히면서 냉매를 배출한다.The compressor 3 is driven for 60 seconds at the operation frequency as described above, and at the same time, the refrigerant compressed by the compressor 3 is supplied to the expansion valve 4. At this time, the opening value of the expansion valve 4 is smaller than the opening value at the initial start. The opening value of the expansion valve 4 is closed to reach the opening value of 1.5 x pb for 70 seconds while discharging the refrigerant.

그리고 압축기(3)의 구동시간이 60초를 경과하면, 압축기(3)의 운전주파수는 전 단계보다 더 많이 상승하지만, 팽창밸브(4)의 개도값은 더 작은 개도값을 진행한다. 즉, 압축기(3)는 다음과 같은 운전주파수 식으로 구동한다.When the driving time of the compressor 3 has elapsed 60 seconds, the operating frequency of the compressor 3 increases more than the previous stage, but the opening value of the expansion valve 4 advances the smaller opening value. That is, the compressor 3 is driven by the following operating frequency equation.

[식2b][Equation 2b]

상기와 같은 운전주파수로 압축기(3)가 60초 동안 구동하고, 동시에 압축기(3)의 구동으로 인해서 압축된 냉매는 팽창밸브(4)로 공급된다. 이때, 상기 팽창밸브(4)의 개도값은 전 단계보다 더 적은 개도값이 된다. 즉, 상기 팽창밸브(4)의 개도값은 1.2×pb의 개도값으로 60초 동안 닫히면서 냉매를 배출한다.The compressor 3 is driven for 60 seconds at the operation frequency as described above, and at the same time, the refrigerant compressed by the driving of the compressor 3 is supplied to the expansion valve 4. At this time, the opening value of the expansion valve 4 is smaller than the previous step. That is, the opening value of the expansion valve 4 is closed for 60 seconds at an opening value of 1.2 x pb to discharge the refrigerant.

그리고 60초가 경과하면, 압축기(3)의 운전주파수는 전 단계보다 더 많이 상승하여 기준주파수에 도달하고, 상기 기준주파수로 계속 구동된다. 그리고 팽창밸브(4)의 개도값은 전 단계보다 더 적게 열려 기준 개도값(1.0×pb)에 도달하게 된다.After 60 seconds, the operating frequency of the compressor 3 rises more than the previous stage to reach the reference frequency and continues to operate at the reference frequency. The opening value of the expansion valve 4 is smaller than that of the previous stage to reach the reference opening value (1.0 x pb).

상기와 같이 기준주파수로 압축기(3)가 구동됨과 동시에 압축된 냉매가 팽창밸브(4)로 유입될 때, 상기 팽창밸브(4)의 개도값이 기준 개도값에 도달함에 따라 안정적으로 냉매의 유출입이 조절될 수 있도록 한다.As described above, when the compressor 3 is driven at the reference frequency and the compressed refrigerant flows into the expansion valve 4, the coolant flows out stably as the opening value of the expansion valve 4 reaches the reference opening value. This can be adjusted.

이때, 상기와 같이 실외 공기온도가 43도 미만인 경우, 상기 압축기(3)의 운전주파수가 50HZ이하인 경우 1초당 1HZ씩 상승시키고, 상기 압축기(3)의 운전주파수의 회전상태가 50HZ이상인 경우는 2초당 1HZ씩 상승시킨다.At this time, when the outdoor air temperature is less than 43 degrees as described above, if the operating frequency of the compressor 3 is 50HZ or less, increase by 1HZ per second, and when the rotational state of the operating frequency of the compressor 3 is 50HZ or more 2 Increase by 1HZ per second.

한편, 실외 공기온도가 43도 이상이면, 압축기(3)의 운전주파수 및 팽창밸브(4)의 개도값이 다음과 같이 제어된다.On the other hand, if the outdoor air temperature is 43 degrees or more, the operating frequency of the compressor 3 and the opening value of the expansion valve 4 are controlled as follows.

실외 공기온도가 43도 이상되면, 압축기(3)는 과부하 운전조건이라 판단하여압축기(3)의 운전주파수 및 팽창밸브(4)의 개도값을 제어한다. 즉, 도면에 도시된 바와 같이 인버터공기조화기가 초기 구동시, 40초 동안 압축기(3)의 운전주파수가 25hz로 운전하고, 동시에 압축기(3)의 구동으로 인해서 압축된 냉매가 팽창밸브(4)로 공급된다. 이때, 상기 팽창밸브(4)는 30초 동안 최대로 열린 상태이다.When the outdoor air temperature is 43 degrees or more, the compressor 3 determines that it is an overload operation condition and controls the operating frequency of the compressor 3 and the opening value of the expansion valve 4. That is, as shown in the drawing, when the inverter air conditioner is initially driven, the operating frequency of the compressor 3 is operated at 25 hz for 40 seconds, and at the same time, the refrigerant compressed by the drive of the compressor 3 is expanded to the expansion valve 4. Is supplied. At this time, the expansion valve (4) is in the maximum open state for 30 seconds.

상기 팽창밸브(4)의 개도값이 최대인 초기 구동시에는, 압축기(3)의 운전주파수에 따른 고온고압의 냉매가 안정적으로 공급되고, 또한 냉매를 압축하는 압축기(3)의 압력이 증가하는 것이 방지된다.In the initial driving at which the opening value of the expansion valve 4 is maximum, the refrigerant of high temperature and high pressure according to the operating frequency of the compressor 3 is stably supplied, and the pressure of the compressor 3 that compresses the refrigerant increases. Is prevented.

한편, 압축기(3)의 구동시간이 40초가 경과하면, 압축기(3)는 60초 동안 다음과 같은 운전주파수 식으로 제어된다.On the other hand, when the driving time of the compressor 3 has elapsed 40 seconds, the compressor 3 is controlled by the following operating frequency formula for 60 seconds.

[식1c][Equation 1c]

상기와 같은 운전주파수로 압축기(3)가 60초 동안 구동하고, 동시에 압축기(3) 구동으로 인해서 압축된 냉매는 팽창밸브(4)로 공급된다. 이때, 상기 팽창밸브(4)의 개도값은 초기 기동시 개도값보다 더 작다. 상기 팽창밸브(4)의 개도값은 70초 동안 2.0×pb의 개도값으로 도달하도록 기동제어되면서 열리게 된다. 이는 표준조건에서보다 과부하 운전조건에서 팽창밸브(4)의 개도값이 더 큰 값으로 적용됨으로서, 압축된 냉매가 실외 열교환기(2)를 거쳐 팽창밸브(4)를 통과하여 실내 열교환기(1)로 유입됨에 따라 발생되는 부하증가를 줄일 수 있다. 또한, 이로 인해서 더욱 빠른 시간 안에 실내 공기를 시원하게 조성하여 표준 온도조건으로 인버터공기조화기가 구동하도록 제어할 수 있다.The compressor 3 is driven for 60 seconds at the operation frequency as described above, and at the same time, the refrigerant compressed by the compressor 3 is supplied to the expansion valve 4. At this time, the opening value of the expansion valve 4 is smaller than the opening value at the initial start. The opening value of the expansion valve 4 is opened while being controlled to start to reach an opening value of 2.0 x pb for 70 seconds. This is because the opening value of the expansion valve 4 is larger in the overload operation condition than in the standard condition, so that the compressed refrigerant passes through the expansion valve 4 through the outdoor heat exchanger 2 and the indoor heat exchanger 1 It can reduce the increase in load caused by the flow into. In addition, it is possible to control the inverter air conditioner to operate under standard temperature conditions by making the indoor air cooler in a faster time.

그리고 압축기(3)의 구동시간이 60초가 경과하면, 압축기(3)의 운전주파수가 전 단계보다 더 많이 상승하지만, 팽창밸브(4)의 개도값은 더 작은 개도값으로 진행된다. 즉, 압축기(3)는 다음과 같은 운전주파수 식으로 구동한다.When the driving time of the compressor 3 has elapsed 60 seconds, the operating frequency of the compressor 3 increases more than the previous stage, but the opening value of the expansion valve 4 proceeds to a smaller opening value. That is, the compressor 3 is driven by the following operating frequency equation.

[식2c][Equation 2c]

상기와 같은 운전주파수 식으로 압축기(3)의 구동시간이 60초 동안 구동하고, 동시에 압축기(3)의 구동으로 인해서 압축된 냉매는 팽창밸브(4)로 공급된다. 이때, 상기 팽창밸브(4)의 개도값은 전 단계보다 더 적은 개도값이 된다. 즉, 상기 팽창밸브(4)의 개도값은 1.5×pb의 개도값으로 110초 동안 기동제어되면서 열리게 된다. 이때, 상기 팽창밸브(4)의 개도값은 표준조건에서보다 과부하 운전조건에서 더 큰 값으로 적용된다.The driving time of the compressor 3 is driven for 60 seconds by the operating frequency formula as described above, and at the same time, the refrigerant compressed by the driving of the compressor 3 is supplied to the expansion valve 4. At this time, the opening value of the expansion valve 4 is smaller than the previous step. That is, the opening value of the expansion valve (4) is opened while the start control for 110 seconds to the opening value of 1.5 × pb. At this time, the opening value of the expansion valve 4 is applied to a larger value in the overload operating conditions than in the standard conditions.

상기와 같이 기준주파수로 압축기(3)가 구동됨과 동시에 압축된 냉매가 팽창밸브(4)로 유입될 때, 상기 팽창밸브(4)의 개도값이 기준 개도값으로 열림에 따라 안정적으로 냉매의 유출입이 조절될 수 있다.As described above, when the compressor 3 is driven at the reference frequency and the compressed refrigerant flows into the expansion valve 4, the opening and closing value of the expansion valve 4 is stably opened and opened as the reference opening value. This can be adjusted.

이때, 상기와 같이 실외 공기온도가 41도 이상인 경우, 상기 압축기(3)의 운전주파수는 25HZ이하인 경우, 1초당 1HZ씩 상승시키고, 상기 압축기(3)의 운전주파수가 25HZ이상인 경우, 3초당 1HZ씩 상승시키며, 상기 압축기(3)의 운전주파수가 50HZ이상인 경우, 10초당 1HZ씩 상승시킨다.At this time, when the outdoor air temperature is 41 degrees or more as described above, when the operating frequency of the compressor (3) is 25HZ or less, 1HZ per second is increased, and when the operating frequency of the compressor (3) is 25HZ or more, 1HZ per 3 seconds When the operating frequency of the compressor (3) is 50HZ or more, increase by 1HZ every 10 seconds.

이상 살펴본 바와 같이 본 발명은 측정된 실외 공기온도를 기설정된 실외 공기온도값과 비교하여, 전자팽창밸브의 개도값을 제어하고 동시에 압축기의 운전주파수를 단계적으로 제어하는 것을 기본적인 기술적 사상으로 한다.As described above, in the present invention, it is a basic technical idea to compare the measured outdoor air temperature with a preset outdoor air temperature value, to control the opening value of the electromagnetic expansion valve and to simultaneously control the operation frequency of the compressor.

본 발명의 권리는 위에서 설명된 실시예에 한정되지 않고 청구범위에 기재된 바에 의해 정의되며, 본 발명의 분야에서 통상의 지식을 가진 자가 청구범위에 기재된 권리범위 내에서 다양한 변형과 개작을 할 수 있다는 것은 자명하다.The rights of the present invention are not limited to the embodiments described above, but are defined by the claims, and those skilled in the art can make various modifications and adaptations within the scope of the claims. It is self-evident.

따라서 본 발명에 따른 인버터공기조화기의 운전제어방법으로 인해서 다음과 같은 효과를 기대할 수 있다.Therefore, the following effects can be expected due to the operation control method of the inverter air conditioner according to the present invention.

본 발명으로 인해서 초기 기동시 높은 실외 공기온도에 대하여 전자팽창변의 개도값을 각 단계에서 상향 조정함으로서, 제품내에 흐르는 전류를 제어하여 전류폭주를 방지하였다. 그리고 실외 온도가 특정 온도 이상인 경우, 압축기의 주파수 상승속도를 낮추어 전류제한을 안정적으로 수행하도록 제어할 수 있다.According to the present invention, the current opening in the product is controlled by preventing the current runaway by adjusting the opening value of the electron expansion edge at each stage with respect to the high outdoor air temperature at the initial start-up. And when the outdoor temperature is above a certain temperature, it is possible to control to reduce the frequency rising speed of the compressor to perform a stable current limit.

이와 같이 실외 공기온도가 매우 높아, 압축기가 과부하 상태에 도달하는 경우, 압축기주파수 제어와 동시에 전자팽창밸브의 개도값을 제어함으로 인해서 빠른 시간 내에 안정된 전류가 흐르도록 제어함으로서, 본 발명에 따른 제품을 사용하는 사용자는 제품에 대한 만족감을 극대화시킬 수 있다.As such, when the outdoor air temperature is very high and the compressor reaches an overload condition, a stable current flows within a short time by controlling the compressor frequency and simultaneously controlling the opening value of the electromagnetic expansion valve, thereby controlling the product according to the present invention. Users can maximize their satisfaction with the product.

Claims (1)

실외 공기온도에 따라, 압축기의 운전주파수 및 팽창밸브의 개도값을 설정하는 단계와;Setting an operating frequency of the compressor and an opening value of the expansion valve according to the outdoor air temperature; 실외 공기온도를 측정하는 단계와;Measuring the outdoor air temperature; 전원이 인가되면, 실외 공기온도에 따라 압축기가 최소운전주파수로 구동하는 단계와;When the power is applied, driving the compressor at the minimum operating frequency according to the outdoor air temperature; 상기 압축기의 구동으로 압축된 냉매의 토출압력을 저감시키기 위해서, 실외 공기온도에 따라 하강폭을 가변조절해서 팽창밸브를 최대값에서 기준개도값으로 단계적으로 제어하는 단계와;Controlling the expansion valve step by step from a maximum value to a reference opening value by varying a drop width in accordance with outdoor air temperature in order to reduce the discharge pressure of the refrigerant compressed by the driving of the compressor; 압축기의 운전주파수가 최소운전주파수에서 기준 운전주파수까지 단계적으로 증가하도록, 측정된 실외 공기온도에 따라 압축기의 운전주파수 상승폭을 가변조절하는 단계를 포함하여 구성되는 인버터공기조화기의 운전제어방법.And variably adjusting the operating frequency rise of the compressor according to the measured outdoor air temperature so that the operating frequency of the compressor increases from the minimum operating frequency to the reference operating frequency step by step.
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KR100667977B1 (en) * 2000-01-21 2007-01-15 주식회사 엘지이아이 Method and device for control capillary tube in inverter air conditioner
KR100735170B1 (en) * 2005-01-21 2007-07-03 엘지전자 주식회사 Driving control method of the linear expansion valve of a multi-type airconditioner
CN103134135A (en) * 2011-11-25 2013-06-05 比亚迪股份有限公司 Control method and control system for household air conditioner electronic expansion valve
CN107560085A (en) * 2017-09-18 2018-01-09 上海三菱电机·上菱空调机电器有限公司 Compressor of air conditioner minimum running frequency control method and control device
CN109579230A (en) * 2018-11-16 2019-04-05 青岛海信日立空调系统有限公司 A kind of distribution method and device of compressor frequency
CN110925938A (en) * 2019-11-07 2020-03-27 珠海格力电器股份有限公司 Air conditioner starting operation control method and device and air conditioner
CN112555977A (en) * 2020-12-10 2021-03-26 广东芬尼克兹节能设备有限公司 Frequency modulation method and device of variable frequency heat pump, computer equipment and storage medium
CN113819639A (en) * 2021-09-07 2021-12-21 青岛海尔空调器有限总公司 Control method and device for adjusting frequency of air conditioner compressor

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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100667977B1 (en) * 2000-01-21 2007-01-15 주식회사 엘지이아이 Method and device for control capillary tube in inverter air conditioner
KR100735170B1 (en) * 2005-01-21 2007-07-03 엘지전자 주식회사 Driving control method of the linear expansion valve of a multi-type airconditioner
CN103134135A (en) * 2011-11-25 2013-06-05 比亚迪股份有限公司 Control method and control system for household air conditioner electronic expansion valve
CN103134135B (en) * 2011-11-25 2015-08-26 比亚迪股份有限公司 A kind of control method of household air conditioner electronic expansion valve and control system
CN107560085A (en) * 2017-09-18 2018-01-09 上海三菱电机·上菱空调机电器有限公司 Compressor of air conditioner minimum running frequency control method and control device
CN109579230A (en) * 2018-11-16 2019-04-05 青岛海信日立空调系统有限公司 A kind of distribution method and device of compressor frequency
CN109579230B (en) * 2018-11-16 2021-01-08 青岛海信日立空调系统有限公司 Compressor frequency distribution method and device
CN110925938A (en) * 2019-11-07 2020-03-27 珠海格力电器股份有限公司 Air conditioner starting operation control method and device and air conditioner
CN112555977A (en) * 2020-12-10 2021-03-26 广东芬尼克兹节能设备有限公司 Frequency modulation method and device of variable frequency heat pump, computer equipment and storage medium
CN113819639A (en) * 2021-09-07 2021-12-21 青岛海尔空调器有限总公司 Control method and device for adjusting frequency of air conditioner compressor
CN113819639B (en) * 2021-09-07 2022-12-23 青岛海尔空调器有限总公司 Control method and device for adjusting frequency of air conditioner compressor

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