KR100677879B1 - Noise reduction method for refrigerator - Google Patents

Noise reduction method for refrigerator Download PDF

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Publication number
KR100677879B1
KR100677879B1 KR1020050045582A KR20050045582A KR100677879B1 KR 100677879 B1 KR100677879 B1 KR 100677879B1 KR 1020050045582 A KR1020050045582 A KR 1020050045582A KR 20050045582 A KR20050045582 A KR 20050045582A KR 100677879 B1 KR100677879 B1 KR 100677879B1
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South Korea
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refrigerator
sound quality
noise
quality index
compressor
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KR1020050045582A
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Korean (ko)
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KR20060123925A (en
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정정교
주재만
이제원
이진경
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삼성전자주식회사
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    • 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
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D29/00—Arrangement or mounting of control or safety devices
    • F25D29/003—Arrangement or mounting of control or safety devices for movable devices
    • 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
    • F25B2500/00—Problems to be solved
    • F25B2500/12—Sound
    • 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
    • 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

Abstract

본 발명은 냉장고의 소음 저감방법에 관한 것으로, 특히 본 발명은 냉장고 작동중일 때의 주변소음에 대한 음질지수가 냉장고 운전 정지 중일 때의 주변소음에 대한 음질지수에 추종하도록 냉장고의 주소음원인 압축기의 회전수를 가변시킴으로서 냉장고의 성능 저하를 최소화하면서도 소비자의 체감 소음 만족도를 극대화한다.The present invention relates to a method for reducing the noise of a refrigerator, and in particular, the present invention relates to a compressor that is an address sound source of a refrigerator so that the sound quality index for ambient noise when the refrigerator is in operation follows the sound quality index for ambient noise when the refrigerator is stopped. By varying the number of revolutions, the performance of the refrigerator is minimized while maximizing consumer's sense of noise.

이를 위해 본 발명은 압축기 작동시의 냉장고 주변소음을 측정하고, 측정된 소음값에 따라 음질지수값을 산출하고, 산출된 음질지수값이 냉장고 주변소음과 소비자의 만족도를 고려하여 미리 설정된 기준음질지수값에 도달하도록 작동 중인 압축기의 회전수를 가감한다.To this end, the present invention measures the noise around the refrigerator during operation of the compressor, calculates the sound quality index value according to the measured noise value, and the calculated sound quality index value is set in advance in consideration of the noise around the refrigerator and the customer's satisfaction. The speed of the running compressor is decremented to reach the value.

Description

냉장고의 소음 저감방법{NOISE REDUCTION METHOD FOR REFRIGERATOR}Noise reduction method of refrigerator {NOISE REDUCTION METHOD FOR REFRIGERATOR}

도 1은 본 발명에 따른 냉장고 소음 저감장치에 대한 제어블록도이다.1 is a control block diagram of a refrigerator noise reduction apparatus according to the present invention.

도 2는 도 1의 제어부에 대한 세부적인 제어블록도이다.FIG. 2 is a detailed control block diagram of the controller of FIG. 1.

도 3은 본 발명의 실시예에 따른 냉장고 소음 저감방법에 대한 제어흐름도이다.3 is a control flowchart of a method for reducing refrigerator noise according to an exemplary embodiment of the present invention.

도 4는 도 3의 압축기, F팬 및 R팬이 모두 작동 중일 때의 냉장고 소음 저감방법에 대한 제어흐름도이다.FIG. 4 is a control flowchart illustrating a method of reducing the noise of a refrigerator when all of the compressor, the F fan, and the R fan of FIG. 3 are in operation.

도 5는 도 3의 압축기과 F팬이 작동 중 일 때의 냉장고 소음 저감방법에 대한 제어흐름도이다.FIG. 5 is a control flowchart illustrating a method of reducing refrigerator noise when the compressor and the F fan of FIG. 3 are in operation.

도 6은 도 3의 압축기과 R팬이 작동 중 일 때의 냉장고 소음 저감방법에 대한 제어흐름도이다.FIG. 6 is a control flowchart illustrating a method of reducing the noise of a refrigerator when the compressor and the R fan of FIG. 3 are in operation.

*도면의 주요 기능에 대한 부호의 설명** Description of the symbols for the main functions of the drawings *

10 : F실온도센서 11 : R실온도센서10: F room temperature sensor 11: R room temperature sensor

12 : 온도설정부 13 : 주변소음측정부12: temperature setting unit 13: ambient noise measurement unit

20 : 제어부 21 : 마이크로프로세서20 control unit 21 microprocessor

22 : 음질지수산출회로 23 : 소음레벨비교회로22: sound quality index calculation circuit 23: noise level comparison

24 : 기주음질지수조절회로 25 : 음질지수비교회로24: host sound quality index control circuit 25: sound quality index non-church

26 : 압축기회전수조절회로 27 : 팬회전수조절회로26: compressor rotation speed control circuit 27: fan rotation speed control circuit

30 : 압축기구동부 31 : 압축기30: compressor driving unit 31: compressor

40 : 팬구동부 41 : F팬40: fan drive 41: F fan

42 : R팬42: R fan

본 발명은 냉장고의 소음 저감방법에 관한 것으로, 더욱 상세하게는 냉장고 작동에 따른 소비자의 체감 소음 만족도를 향상시킬 수 있는 냉장고의 소음 저감방법에 관한 것이다.The present invention relates to a noise reduction method of a refrigerator, and more particularly, to a noise reduction method of a refrigerator capable of improving consumer's haptic noise satisfaction according to the operation of the refrigerator.

최근에는 환경에 대한 관심이 높아지면서 저소음 냉장고에 대한 요구가 높아지고 있는 추세이다.Recently, the demand for low-noise refrigerators is increasing due to increasing environmental concern.

따라서, 종래에는 냉장고 소음을 저감시키기 위해 냉장고의 소음레벨 자체를 저감시키거나, 별도의 장치를 이용하여 주간과 야간을 판별하여 야간에는 냉장고를 압축능력을 떨어뜨려 조용하게 운전하는 기술이 사용되고 있다.Therefore, in order to reduce the noise of the refrigerator, a technology of reducing the noise level of the refrigerator itself or discriminating day and night by using a separate device and reducing the compression capacity at night is quietly used.

하지만, 전자의 경우 소음을 저감시키기 위해 냉장고 성능을 양보해야 하는 문제가 있을 뿐만 아니라, 냉장고의 소음레벨을 떨어뜨리더라도 소음의 음질특성에 따른 근본적인 체감소음문제를 해결할 수 없어 소비자의 체감 소음을 만족시키지 못하는 경우가 많다. 또한, 후자의 경우, 역시 근본적인 체감소음문제를 해결하지 못할 뿐만 아니라, 생활패턴의 변화로 인해, 야간에도 냉장고 사용이 빈번해지고 있는 추세에 있음에도 불구하고, 냉장고의 성능이 지나치게 낮아지는 결과를 초래하는 문제점이 있다.However, the former not only has to yield the performance of the refrigerator in order to reduce the noise, but even if the noise level of the refrigerator is lowered, it is not possible to solve the fundamental haptic noise caused by the sound quality characteristics of the noise, thereby satisfying the consumers' haptic noise. In many cases you can't. In addition, in the latter case, not only does not solve the fundamental haptic noise problem, but also due to changes in living patterns, the use of the refrigerator is frequently used even at night, resulting in excessively low performance of the refrigerator. There is a problem.

본 발명은 전술한 문제점을 해결하기 위한 것으로, 본 발명의 목적은 냉장고의 성능 저하를 최소화하면서도 소비자의 체감 소음 만족도를 극대화할 수 있는 냉장고의 소음 저감방법을 제공하는 것이다.The present invention is to solve the above problems, an object of the present invention is to provide a noise reduction method of the refrigerator that can maximize the consumer's sense of noise satisfaction while minimizing the performance degradation of the refrigerator.

또한, 본 발명의 다른 목적은 체감 소음 만족도를 만족시키면서도 냉장고의 성능을 향상시킬 수 있는 냉장고의 소음 저감방법을 제공하는 것이다.In addition, another object of the present invention is to provide a refrigerator noise reduction method that can improve the performance of the refrigerator while satisfying the haptic noise satisfaction.

전술한 목적을 달성하기 위한 본 발명의 냉장고의 소음 저감방법은 회전수 조절 가능한 압축기를 구비한 냉장고의 소음을 저감하는 방법에 있어서, 압축기 작동시의 냉장고 주변소음을 측정하고, 상기 측정된 소음값에 따라 음질지수값을 산출하고, 상기 산출된 음질지수값이 냉장고 주변소음과 소비자의 만족도를 고려하여 미리 설정된 기준음질지수값에 도달하도록 작동 중인 압축기의 회전수를 가감하는 것을 특징으로 한다.The noise reduction method of the refrigerator of the present invention for achieving the above object in the method for reducing the noise of the refrigerator having a compressor capable of adjusting the rotation speed, measuring the ambient noise around the refrigerator during operation of the compressor, the measured noise value The sound quality index value is calculated, and the number of rotations of the compressor in operation is set so that the calculated sound quality index value reaches a preset reference sound quality index value in consideration of the noise around the refrigerator and the customer's satisfaction.

상기 측정된 소음레벨정도에 따라 상기 기준음질지수값을 가감하고, 상기 산출된 음질지수값이 가감된 상기 기준음질지수값에 도달하도록 작동 중인 압축기의 회전수를 가감하는 것을 특징으로 한다.The reference sound quality index value is added or subtracted according to the measured noise level, and the number of rotations of the compressor in operation is adjusted to reach the reference sound quality index value to which the calculated sound quality index value is added or subtracted.

상기 측정된 소음값이 미리 설정된 소음값보다 높으면, 상기 기준음질지수값을 소정수준 높이고, 상기 측정된 소음값이 미리 설정된 값보다 낮으면, 상기 기준 음질지수값을 소정수준 낮추는 것을 특징으로 한다.When the measured noise value is higher than the preset noise value, the reference sound quality index value is increased to a predetermined level, and when the measured noise value is lower than the preset value, the reference sound quality index value is lowered to a predetermined level.

상기 음질지수값이 상기 기준음질지수값보다 적으면, 상기 압축기의 회전수를 높이고, 상기 음질지수값이 상기 기준음질지수값보다 크면, 상기 압축기의 회전수를 낮추는 것을 특징으로 한다.When the sound quality index value is less than the reference sound quality index value, the rotation speed of the compressor is increased, and when the sound quality index value is larger than the reference sound quality index value, it is characterized in that the rotation speed of the compressor is lowered.

상기 작동중인 압축기의 회전수를 낮출 때, 작동 중인 냉장실팬과 냉동실팬의 회전수를 소정수준 증가시키는 것을 특징으로 한다.When the rotational speed of the compressor in operation is lowered, the rotational speed of the refrigerating chamber fan and the freezing chamber fan is increased to a predetermined level.

이하에서는 본 발명의 바람직한 실시예를 본 도면을 참조하여 상세하게 설명하도록 한다.Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

도 1에 도시된 바와 같이, 본 발명에 따른 냉장고 소음 저감장치는 전반적인 제어를 수행하는 제어부(20)를 구비한다.As shown in Figure 1, the refrigerator noise reduction apparatus according to the present invention includes a control unit 20 for performing the overall control.

이 제어부(20)의 입력측에는 냉동실(F실)의 온도를 감지하기 위한 냉동실온도센서(10), 냉장실(R실)의 온도를 감지하기 위한 냉장실온도센서(11), 냉장실 및 냉동실의 온도를 설정하여 제어부(20)에 입력하기 위한 온도설정부(12), 냉장고의 주변소음을 검출하기 위한 주변소음측정부(13)가 전기적으로 연결된다.On the input side of the control unit 20, the temperature of the freezer compartment temperature sensor 10 for detecting the temperature of the freezer compartment (F chamber), the refrigerating compartment temperature sensor 11 for detecting the temperature of the refrigerating compartment (R chamber), the temperature of the refrigerating chamber and the freezer compartment The temperature setting unit 12 for setting and inputting the control unit 20 and the ambient noise measurement unit 13 for detecting ambient noise of the refrigerator are electrically connected to each other.

주변소음측정부(13)는 마이크로폰으로 이루어진다.The ambient noise measurement unit 13 is made of a microphone.

또한 제어부(20)의 출력측에는 제어부(20)의 제어신호에 의해 압축기(COMP)(31)를 구동하기 위한 압축기구동부(30)와, 냉동실팬(이하 F팬이라 칭함)(41)과 냉장실팬(이하 R팬이라 칭함)(42)을 구동하기 위한 팬구동부(40)가 전기적으로 연결된다. 이때, 압축기(31), F팬, R팬은 회전수 조절 가능한 압축기와 송풍팬이다.In addition, on the output side of the control unit 20, a compressor driving unit 30 for driving the compressor (COMP) 31 by a control signal of the control unit 20, a freezer compartment fan (hereinafter referred to as an F fan) 41 and a refrigerating compartment fan The fan driving part 40 for driving 42 (hereinafter referred to as R fan) is electrically connected. At this time, the compressor 31, the F fan, the R fan is a compressor and a blowing fan that can be adjusted in rotation speed.

또한 제어부(20) 내의 자체 메모리에는 냉장고 주변소음과 소비자의 만족도를 고려하여 미리 설정된 기준음질지수가 저장되어 있다. 이때, 기준음질지수는 냉장고의 운전정지 중일 때, 냉장고 주변소음을 측정한 후 측정된 소음값의 음의 크기(loudness)와, 음의 거칠기(roughness)와, 음의 날카로움(sharpness) 등으로부터 음질지수(sound quality index)에 대하여 소비자의 체감 소음 만족도를 대변하는 음질지수를 기준음질지수로 선정하고, 선정된 기준음질지수를 메모리에 미리 저장시킨다.In addition, in the internal memory of the controller 20, the reference sound quality index preset in consideration of the noise around the refrigerator and the customer's satisfaction is stored. At this time, the reference sound quality index is the sound quality from the loudness, the roughness, the sharpness of the noise, etc. of the measured noise value after measuring the noise around the refrigerator when the refrigerator is stopped. For the sound quality index, the sound quality index representing the consumer's perceived noise satisfaction is selected as the reference sound quality index, and the selected reference sound quality index is stored in advance in the memory.

상기한 제어부(20)는 마이크로프로세서(21)와, 음질지수산출회로(22)와, 소음레벨비교회로(23)와, 기준음질지수조절회로(24)와, 음질지수비교회로(25)와, 압축기회전수조절회로(26)와, 팬회전수조절회로(27)를 구비한다.The control unit 20 includes a microprocessor 21, a sound quality index calculation circuit 22, a noise level comparison circuit 23, a reference sound index control circuit 24, a sound quality index non-intersection 25 and And a compressor rotation speed regulating circuit 26 and a fan rotation speed regulating circuit 27.

음질지수산출회로(22)는 측정된 냉장고 주변소음으로부터 음질지수를 산출하는 회로이다. 이때, 음질지수는 측정된 냉장고 주변소음에 포함된 음의 크기(loudness)와, 음의 거칠기(roughness)와, 음의 날카로움(sharpness) 등으로부터 미리 설정된 음질지수식을 통하여 음질지수를 산출한다. 음의 크기는 음압레벨, 음의 주파수 및 주파수 대역폭에 의해 결정되며, 음의 거칠기는 음압레벨, 음의 주파수, 변조주파수에 의해 결정되며, 음의 날카로움은 음의 크기와 주파수에 의해 결정된다.The sound quality index calculation circuit 22 is a circuit for calculating the sound quality index from the measured noise around the refrigerator. In this case, the sound quality index is calculated through a preset sound quality index from the loudness, the roughness of the sound, the sharpness of the sound, etc. included in the measured noise around the refrigerator. The loudness of sound is determined by sound pressure level, sound frequency and frequency bandwidth. The roughness of sound is determined by sound pressure level, sound frequency and modulation frequency, and the sharpness of sound is determined by sound volume and frequency.

소음레벨비교회로(23)는 측정된 냉장고 주변소음의 소음레벨과 기준소음레벨을 비교하는 회로이다.The noise level comparison furnace 23 is a circuit for comparing the noise level of the noise around the refrigerator with the reference noise level.

기준음질지수조절회로(24)는 기준음질지수를 가감하여 음질지수값을 조절하 는 회로이다.The reference sound quality index control circuit 24 is a circuit for adjusting the sound quality index value by adding or subtracting the reference sound quality index.

음질지수비교회로(25)는 음질지수산출회로(22)로부터 산출된 음질지수와 기준음질지수를 비교하는 회로이다.The sound quality index non-crossing path 25 is a circuit for comparing the sound quality index calculated from the sound quality index calculation circuit 22 and the reference sound index.

압축기회전수조절회로(26)는 압축기(31)의 회전수를 조절하는 회로이다.The compressor rotation speed control circuit 26 is a circuit for adjusting the rotation speed of the compressor 31.

팬회전수조절회로(27)는 F팬(41)과 R팬(42)의 회전수를 조절하는 회로이다.The fan rotation speed regulating circuit 27 is a circuit for adjusting the rotation speed of the F fan 41 and the R fan 42.

마이크로프로세서(21)의 작용을 살펴보면, 마이크로프로세서(21)는 상기한 구성요소들간의 상호작용에 의하여, 먼저, 압축기(31) 작동시의 냉장고 주변소음을 검출하고, 검출된 소음값에 따라 음질지수값을 산출하고, 산출된 음질지수값이 냉장고 주변소음과 소비자의 만족도를 고려하여 미리 설정된 기준음질지수값에 도달하도록 산출된 음질지수값과 기준음질지수값을 비교하여 산출된 음질지수값이 기준음질지수값보다 적으면, 압축기(31)의 회전수를 소정수준 높이고, 산출된 음질지수값이 기준음질지수값보다 크면, 압축기(31)의 회전수를 소정수준 낮춘다. 이로 인해, 냉장고의 성능 감소를 최소화하면서도 소비자의 체감 소음 만족도를 극대화하게 된다. 이때, 마이크로프로세서(21)는 측정된 냉장고 주변 소음값과 미리 설정된 값을 비교하여 냉장고 주변이 주간과 같이 시끄러운 상태인지 야간과 같이 조용한 상태인지를 판단하고, 시끄러운 상태이면, 냉장고가 냉장고 성능 확보를 우선하여 운전되도록 미리 설정된 기준음질지수값을 소정수준 증가시키고, 조용한 상태이면, 냉장고가 소비자의 체감 소음 만족도를 우선하여 운전되도록 미리 설정된 음질지수값을 소정수준 감소시킨다.Referring to the operation of the microprocessor 21, the microprocessor 21 first detects the noise around the refrigerator during operation of the compressor 31 by the interaction between the above components, and the sound quality according to the detected noise value. The sound quality index value is calculated by comparing the sound quality index value and the sound quality index value calculated so that the calculated sound quality index value reaches a preset standard sound quality index value in consideration of the noise around the refrigerator and the customer's satisfaction. If it is less than the reference sound quality index value, the rotation speed of the compressor 31 is raised to a predetermined level, and if the calculated sound quality index value is larger than the reference sound quality index value, the rotation speed of the compressor 31 is lowered to a predetermined level. This maximizes the consumer's perceived noise satisfaction while minimizing the decrease in performance of the refrigerator. At this time, the microprocessor 21 compares the measured noise value around the refrigerator with a preset value to determine whether the refrigerator is in a noisy state such as a daytime or a quiet state at night, and if it is noisy, the refrigerator secures the refrigerator performance. First, the reference sound quality index value preset to be operated is increased to a predetermined level, and in a quiet state, the refrigerator reduces the predetermined sound quality index value to a predetermined level so as to operate in preference to the consumer's haptic noise satisfaction.

한편, 산출된 음질지수값이 기준음질지수값보다 커서, 압축기(31)의 회전수 를 소정수준 낮추어 운전하는 경우에는 상대적으로 소음의 대역폭이 넓어 체감소음평가시 영향이 적은 송풍팬(F팬과 R팬)의 회전수를 증가시켜 압축능력 감소에 따른 냉장고 성능 저하를 최소화한다.On the other hand, when the calculated sound quality index value is larger than the reference sound quality index value, and the operation speed of the compressor 31 is lowered by a predetermined level, a relatively wider bandwidth of noise has a relatively low impact blow fan (F fan and R fan) to increase the number of revolutions to minimize the deterioration of refrigerator performance due to reduced compression capacity.

이하에서는 본 발명의 실시예에 따른 냉장고 소음 저감방법을 설명한다.Hereinafter will be described a refrigerator noise reduction method according to an embodiment of the present invention.

도 4를 살펴보면, 먼저, 단계 S100에서 제어부(20)는 냉장고가 운전정지 중인지를 판단한다.Referring to FIG. 4, first, in step S100, the controller 20 determines whether the refrigerator is stopped.

냉장고가 운전정지 중이면, 단계 S101에서 제어부(20)는 냉장고의 주변소음(N)을 측정한다.If the refrigerator is stopped, the controller 20 measures the ambient noise N of the refrigerator in step S101.

냉장고의 주변소음(N)을 검출한 후 단계 S102에서, 제어부(20)는 검출된 소음의 음의 크기, 거칠기, 날카로움 정도를 분석하여 음질지수를 산출한 후 이 중에서 소비자의 체감 소음만족도를 대변하는 음질지수를 기준음질지수(SQ_s)로 설정한다.After detecting the ambient noise (N) of the refrigerator, in step S102, the control unit 20 calculates a sound quality index by analyzing the loudness, roughness, and sharpness of the detected noise, and among them, represents the consumer's perceived noise satisfaction level. The sound quality index to be set as the reference sound quality index (SQ_s).

그런 후, 단계 S103에서, 제어부(20)는 냉동실온도(Tf)를 검출하고, 단계 S104에서, 검출된 냉동실온도(Tf)와 사용자에 의해 설정된 냉동실설정온도(Tfs)를 비교한다.Then, in step S103, the control unit 20 detects the freezer compartment temperature Tf, and in step S104, compares the detected freezer compartment temperature Tf with the freezer compartment set temperature Tfs set by the user.

단계 S104의 비교결과 냉동실온도(Tf)가 냉동실설정온도(Tfs)보다 높으면, 단계 S105에서 제어부(20)는 냉장실온도(Tr)를 검출하고, 단계 S106에서, 검출된 냉장실온도(Tr)와 사용자에 의해 설정된 냉장실설정온도(Trs)를 비교한다.When the freezer compartment temperature Tf is higher than the freezer compartment set temperature Tfs as a result of the comparison of step S104, the control unit 20 detects the refrigerator compartment temperature Tr in step S105, and in step S106, the detected refrigerator compartment temperature Tr and the user. Compare the refrigerator compartment set temperature (Trs) set by.

단계 S106의 비교결과 냉장실온도(Tr)가 냉장실설정온도(Trs)보다 높으면, 단계 S107에서 제어부(20)는 압축기(31), F팬(41) 및 R팬(42)을 모두 온 시킨다. 이때, 압축기(31), F팬(41), R팬(42)을 미리 설정된 회전수로 작동시킨다. 그런 후 A로 진행하여 도 4에서 그에 따른 냉장고 저감알고리즘을 수행한다. 한편, 냉장실온도(Tr)가 냉장실설정온도(Trs)보다 낮으면, 단계 S108에서 제어부(20)는 R팬(42)을 제외한 압축기(31)와 F팬(41)을 온 시킨다. 그런 후 B로 진행하여 도 5에서 그에 따른 냉장고 저감알고리즘을 수행한다.When the refrigerating chamber temperature Tr is higher than the refrigerating chamber set temperature Trs as a result of the comparison of step S106, the control unit 20 turns on the compressor 31, the F fan 41 and the R fan 42 in step S107. At this time, the compressor 31, the F fan 41, and the R fan 42 are operated at a predetermined rotation speed. Then proceed to A to perform the refrigerator reduction algorithm according to FIG. On the other hand, if the refrigerator compartment temperature Tr is lower than the refrigerator compartment set temperature Trs, the control unit 20 turns on the compressor 31 and the F fan 41 except for the R fan 42 in step S108. Then, proceed to B to perform the refrigerator reduction algorithm according to FIG.

한편, 단계 S104의 비교결과 냉동실온도(Tf)가 냉동실설정온도(Tfs)보다 낮으면, 단계 S109에서 제어부(20)는 냉장실온도(Tr)를 검출하고, 단계 S110에서, 검출된 냉장실온도(Tr)와 사용자에 의해 설정된 냉장실설정온도(Trs)를 비교한다.On the other hand, if the freezer compartment temperature Tf is lower than the freezer compartment set temperature Tfs as a result of the comparison of step S104, the controller 20 detects the refrigerator compartment temperature Tr in step S109, and detects the refrigerator compartment temperature Tr in step S110. ) And the refrigerator set temperature (Trs) set by the user.

단계 S110의 비교결과 냉장실온도(Tr)가 냉장실설정온도(Trs)보다 높으면, 단계 S111에서 제어부(20)는 F팬(41)을 제외한 압축기(31)와 R팬(42)을 온 시킨다. 이때, 압축기(31)와 R팬(42)을 미리 설정된 회전수로 작동시킨다. 그런 후 C로 진행하여 도 6에서 그에 따른 냉장고 저감알고리즘을 수행한다. 한편, 냉장실온도(Tr)가 냉장실설정온도(Trs)보다 낮으면, 단계 S112에서 제어부(20)는 압축기(31), F팬(41), R팬(42)을 모두 오프시킨다. 그런 후 단계 S101로 리턴한다.When the refrigerating chamber temperature Tr is higher than the refrigerating chamber set temperature Trs as a result of the comparison of step S110, in step S111, the control unit 20 turns on the compressor 31 and the R fan 42 except for the F fan 41. At this time, the compressor 31 and the R fan 42 are operated at a predetermined rotation speed. Thereafter, the process proceeds to C to perform the refrigerator reduction algorithm according to FIG. 6. On the other hand, if the refrigerator compartment temperature Tr is lower than the refrigerator compartment set temperature Trs, the control unit 20 turns off the compressor 31, the F fan 41, and the R fan 42 in step S112. Then, the process returns to step S101.

도 4를 살펴보면, 압축기(31), F팬(41) 및 R팬(42)가 모두 온 된 상태에서, 단계 S200에서 제어부(20)는 냉장고의 주변소음(N)을 검출하고, 단계 S201에서, 음질지수(SQ_Index)를 산출한다. 이때, 상술한 바와 마찬가지로, 검출된 소음의 음의 크기, 거칠기, 날카로움 정도를 분석하여 음질지수를 산출한다.Referring to FIG. 4, in a state where the compressor 31, the F fan 41, and the R fan 42 are all turned on, in step S200, the controller 20 detects ambient noise N of the refrigerator, and in step S201. The sound quality index SQ_Index is calculated. In this case, as described above, the sound quality index is calculated by analyzing the loudness, roughness, and sharpness of the detected noise.

그런 후 냉장고 주변소음레벨에 따라 기준음질지수를 가감하는 방식으로 냉장고 주변소음이 주간과 같이 시끄러운 상태에서는 냉장고 성능확보를 위한 운전을 우선하여 수행하고, 야간과 같이 조용한 상태에서는 소비자의 체감소음만족도를 우선하여 수행하기 위하여 냉장고 주변소음 정도를 판단할 수 있도록 먼저, 단계 S202에서, 제어부는 검출된 소음레벨(N)과 미리 설정된 레벨(N_s)을 비교한다.After that, the reference sound quality index is added or subtracted according to the ambient noise level around the refrigerator. When the noise around the refrigerator is noisy as in the daytime, the operation for securing the performance of the refrigerator is prioritized. First of all, in step S202, the controller compares the detected noise level N with a preset level N_s so as to determine the degree of noise around the refrigerator in order to perform the priority.

단계 S202의 비교결과 냉장고 주변소음이 상대적으로 켜서 검출된 소음레벨(N)이 미리 설정된 레벨(N_s)보다 높으면, 단계 S203에서, 제어부(20)는 기준음질지수(SQ_s)를 SQ_s+a(여기서, a는 상수)로 소정수준 높인다. 또한, 냉장고 주변소음이 정상수준이어서 검출된 소음레벨(N)이 미리 설정된 레벨(N_s)과 동일하면, 단계 S204에서, 제어부(20)는 기준음질지수(SQ_s)를 현재수준(SQ_s)으로 유지시킨다. 한편, 냉장고 주변소음이 상대적으로 적어서 검출된 소음레벨(N)이 미리 설정된 레벨(N_s)보다 낮으면, 단계 S205에서, 제어부(20)는 기준음질지수(SQ_s)를 SQ_s-a(여기서, a는 상수)로 소정수준 낮춘다.As a result of the comparison of step S202, when the ambient noise of the refrigerator is relatively turned on and the detected noise level N is higher than the preset level N_s, in step S203, the controller 20 sets the reference sound quality index SQ_s to SQ_s + a (where , a is a constant). In addition, if the noise level (N) detected because the ambient noise around the refrigerator is normal level is equal to the preset level (N_s), in step S204, the control unit 20 maintains the reference sound quality index (SQ_s) at the current level (SQ_s). Let's do it. On the other hand, if the noise level (N) detected because the noise around the refrigerator is relatively low is lower than the preset level (N_s), in step S205, the control unit 20 sets the reference sound quality index (SQ_s) SQ_s-a (where a Lower the predetermined level.

그런 후, 단계 S206에서, 제어부(20)는 단계 S201에서 산출된 음질지수(SQ_Index)와 미리 설정된 기준음질지수(SQ_s)의 크기를 비교한다.Then, in step S206, the control unit 20 compares the sound quality index SQ_Index calculated in step S201 with the size of the preset reference sound index SQ_s.

단계 S205의 비교결과, 산출된 음질지수(SQ_Index)가 미리 설정된 기준음질지수(SQ_s)보다 높으면, 단계 S207에서, 제어부(20)는 산출된 음질지수(SQ_Index)가 미리 설정된 기준음질지수(SQ_s)까지 낮추도록 압축기(31)의 회전수를 현재의 회전수보다 감소시킨다. 이때, 압축 능력이 떨어져 냉장고 성능저하가 최소화되도록 작동중인 F팬과 R팬의 회전수를 현재의 회전수보다 증가시킨다. 이에 따라, 냉장고의 성능 저하를 최소화하면서도 소비자의 체감 소음 만족도를 극대화할 수 있게 된다.As a result of the comparison of step S205, if the calculated sound quality index SQ_Index is higher than the preset reference sound quality index SQ_s, in step S207, the control unit 20 sets the calculated sound quality index SQ_Index to the preset reference sound quality index SQ_s. The rotational speed of the compressor 31 is reduced from the current rotational speed so as to lower it. At this time, the rotational speed of the F fan and the R fan is increased to the current rotational speed so that the compression capacity is reduced to minimize the decrease in the refrigerator performance. Accordingly, it is possible to maximize the consumer's haptic noise satisfaction while minimizing the deterioration of the refrigerator.

한편, 단계 S205의 비교결과, 산출된 음질지수(SQ_Index)가 미리 설정된 기준음질지수(SQ_s)보다 낮으면, 단계 S209에서, 제어부(20)는 산출된 음질지수(SQ_Index)가 미리 설정된 기준음질지수(SQ_s)까지 높아지도록 압축기(31)의 회전수를 현재의 회전수보다 증가시킨다. 이에 따라, 소비자의 체감 소음 만족도를 만족시키면서도 냉장고의 성능을 향상시킬 수 있게 된다.On the other hand, if the calculated sound quality index (SQ_Index) is lower than the preset reference sound quality index (SQ_s) as a result of the comparison of step S205, in step S209, the controller 20 determines that the calculated sound quality index (SQ_Index) is the preset reference sound index. The rotation speed of the compressor 31 is increased to the current rotation speed so as to be up to SQ_s. Accordingly, the performance of the refrigerator can be improved while satisfying the consumer's haptic noise satisfaction.

한편, 도 5와 도 6에서는 상기와 동일한 제어를 통하여, 작동중인 압축기와 송풍팬을 제어하여 냉장고의 성능 저하를 최소화하면서도 소비자의 체감 소음 만족도를 극대화한다. 더불어, 소비자의 체감 소음 만족도를 만족시키면서도 냉장고의 성능을 향상시키게 된다.Meanwhile, in FIG. 5 and FIG. 6, the same control as described above controls the compressor and the blower fan in operation to maximize the consumer's haptic noise satisfaction while minimizing performance degradation of the refrigerator. In addition, the performance of the refrigerator is improved while satisfying the consumers' haptic noise satisfaction.

이상에서 상세히 설명한 바와 같이, 본 발명은 냉장고 작동중일 때의 주변소음에 대한 음질지수가 냉장고 운전 정지 중일 때의 주변소음에 대한 음질지수에 추종하도록 냉장고의 주소음원인 압축기의 회전수를 가변시킴으로서 냉장고의 성능 저하를 최소화하면서도 소비자의 체감 소음 만족도를 극대화할 수 있는 효과가 있다.As described in detail above, the present invention provides a refrigerator by varying the number of revolutions of the compressor, which is the address sound source of the refrigerator, so that the sound quality index for ambient noise when the refrigerator is in operation follows the sound quality index for ambient noise when the refrigerator is stopped. Minimize performance degradation while maximizing consumer's perceived noise satisfaction.

또한, 본 발명은 주변 환경소음이 변화하여도 소비자의 만족도를 일정하게 유지시킬 수 있는 효과가 있다.In addition, the present invention has the effect of maintaining a constant consumer satisfaction even if the ambient environmental noise changes.

또한, 본 발명은 소비자의 체감 소음 만족도를 만족시키면서도 냉장고의 성능을 향상시킬 수 있는 효과가 있다.In addition, the present invention has the effect of improving the performance of the refrigerator while satisfying the consumer's haptic noise satisfaction.

Claims (5)

회전수 조절 가능한 압축기를 구비한 냉장고의 소음을 저감하는 방법에 있어서,In the method of reducing the noise of the refrigerator having a compressor capable of adjusting the rotation speed, 압축기 작동시의 냉장고 주변소음을 측정하고,Measure the noise around the refrigerator during compressor operation 상기 측정된 소음값에 따라 음질지수값을 산출하고,Calculating a sound quality index value according to the measured noise value, 상기 측정된 소음값에 따라 냉장고 주변소음과 소비자의 만족도를 고려하여 미리 설정된 기준음질지수값을 가감하고,In accordance with the measured noise value in consideration of the noise around the refrigerator and the customer's satisfaction, the predetermined reference sound quality index value is added or subtracted, 상기 산출된 음질지수값이 상기 가감된 기준음질지수값에 도달하도록 작동 중인 압축기의 회전수를 가감하는 것을 특징으로 하는 냉장고의 소음 저감방법.Noise reduction method of the refrigerator, characterized in that for reducing the number of revolutions of the compressor in operation so that the calculated sound quality index value reaches the reduced reference sound quality index value. 삭제delete 제1항에 있어서, 상기 측정된 소음값이 미리 설정된 소음값보다 높으면, 상기 기준음질지수값을 소정수준 높이고, 상기 측정된 소음값이 미리 설정된 값보다 낮으면, 상기 기준음질지수값을 소정수준 낮추는 것을 특징으로 하는 냉장고의 소음 저감방법.The reference sound quality index value according to claim 1, wherein if the measured noise value is higher than a preset noise value, the reference sound quality index value is raised to a predetermined level, and if the measured noise value is lower than a preset value, the reference sound quality index value is set to a predetermined level. Noise reduction method of the refrigerator characterized in that the lowering. 제1항에 있어서, 상기 음질지수값이 상기 기준음질지수값보다 적으면, 상기 압축기의 회전수를 높이고, 상기 음질지수값이 상기 기준음질지수값보다 크면, 상기 압축기의 회전수를 낮추는 것을 특징으로 하는 냉장고의 소음 저감방법.The method of claim 1, wherein the rotational speed of the compressor is increased when the sound quality index value is less than the reference sound quality index value, and the rotation speed of the compressor is lowered when the sound quality index value is larger than the reference sound quality index value. Noise reduction method of the refrigerator. 제1항에 있어서, 상기 작동중인 압축기의 회전수를 낮출 때, 작동 중인 냉장실팬과 냉동실팬의 회전수를 소정수준 증가시키는 것을 특징으로 하는 냉장고의 소음 저감방법.The method of claim 1, wherein when the rotational speed of the compressor is lowered, the rotational speed of the refrigerating compartment fan and the freezing compartment fan is increased by a predetermined level.
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