KR100827791B1 - Method for detecting filter-change period in clean bench - Google Patents

Method for detecting filter-change period in clean bench Download PDF

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KR100827791B1
KR100827791B1 KR1020070004680A KR20070004680A KR100827791B1 KR 100827791 B1 KR100827791 B1 KR 100827791B1 KR 1020070004680 A KR1020070004680 A KR 1020070004680A KR 20070004680 A KR20070004680 A KR 20070004680A KR 100827791 B1 KR100827791 B1 KR 100827791B1
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filter
time
motor
wind speed
detecting
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Korean (ko)
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조연제
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조연제
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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
    • F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
    • F24F3/12—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling
    • F24F3/16—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by purification, e.g. by filtering; by sterilisation; by ozonisation
    • F24F3/167—Clean rooms, i.e. enclosed spaces in which a uniform flow of filtered air is distributed

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Air Conditioning Control Device (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)

Abstract

A method for detecting a filter exchange time of a clean bench is provided to detect a filter exchange time according to various inspection items, and to change a filter at a proper interval. A method for detecting a filter exchange time of a clean bench comprises the steps of: predetermining accumulated motor driving time, service life of a filter, predetermined filter exchange time and wind velocity, and storing it to a memory(S41); reading the accumulated motor driving time, and displaying filter exchange when the accumulated motor driving time is larger than the predetermined service life of the filter(S42); displaying the filter exchange when the accumulated motor driving time is smaller than the predetermined service life of the filter in the second step, but the present time is larger than the predetermined filter exchange time(S43,S49); detecting wind velocity of air discharged by using a wind velocity sensor installed in a rear end of the filter, and judging if the wind velocity is smaller than the predetermined velocity, when the present time is smaller than the predetermined filter exchange time in the third step(S44,S45); detecting rotary force of a motor when the wind velocity is smaller than the predetermined velocity in the fourth step(S46); judging if the detected rotary force of the motor is a maximal value, and displaying the filter exchange when the detected rotary force of the motor is the maximal value(S47); and controlling the rotary force of the motor when the detected rotary force of the motor is not the maximal value(S48).

Description

크린 벤치의 필터 교환주기 검출방법{Method for detecting filter-change period in clean bench}Method for detecting filter-change period in clean bench}

도 1은 본 발명의 적용되는 크린 벤치(1)를 나타낸다.1 shows a clean bench 1 to which the present invention is applied.

도 2는 도 1의 클린 에어 공급장치를 나타내는 구성도이다.FIG. 2 is a configuration diagram illustrating the clean air supply device of FIG. 1.

도 3은 본 발명에 따른 필터 교환주기 검출장치의 구성을 나타내는 기능 블록도이다.3 is a functional block diagram showing the configuration of the filter replacement period detecting apparatus according to the present invention.

도 4는 본 발명에 따른 필터 교환주기 검출방법을 설명하는 플로차트이다.4 is a flowchart illustrating a method for detecting a filter change period according to the present invention.

본 발명은 크린 벤치의 필터 교환주기 검출방법에 관한 것으로, 특히 조사할 항목을 다양화하여 필터의 교환을 적절하게 수행하도록 하는 기술에 관한 것이다.The present invention relates to a method for detecting a filter replacement cycle of a clean bench, and more particularly, to a technique for appropriately performing filter replacement by diversifying items to be investigated.

크린 벤치(clean bench)는 크린 룸(clean room)에서 특히 고도의 청정도가 요구되는 작업을 수행하는데 사용된다. 종래, 크린 벤치는 1인 또는 2인의 작업자가 작업을 수행할 수 있는 작업대와, 작업자가 작업을 수행할 수 있는 작업공간과, 공기 정화를 위하여 필요한 헤파 필터, 송풍기(팬과 모터) 등 부품을 수용하는 케이싱을 입체적으로 구비한 케비넷 구조로 제작되어 왔다.Clean benches are used in clean rooms to perform tasks that require particularly high levels of cleanliness. Conventionally, the clean bench has a work bench where one or two workers can perform work, a workspace where the worker can work, and a part such as a hepa filter and a blower (fan and motor) necessary for air purification. It has been manufactured in a cabinet structure provided with a casing to be accommodated in three dimensions.

이러한 종래의 크린 벤치에 있어서, 송풍기의 회전 속도를 일정하게 유지하면서, 토출 풍속을 감지하여 토출 풍속이 기준치(보통 출구 풍속: 0.45m/sec) 이하로 떨어지면 헤파 필터의 교환 시기로 판정하여, 헤파 필터를 교체해 왔다. 그러나, 이러한 방식의 크린 벤치 운용은 헤파 필터의 필터링 능력이 아직 충분함에도 불구하고, 고가의 헤파 필터를 빈번히 교체하게 하여, 크린 벤치의 유지 비용을 과다하게 하는 문제점이 있었다.In the conventional clean bench, while maintaining the rotational speed of the blower, the discharge wind speed is sensed, and when the discharge wind speed falls below the reference value (usually the exit wind speed: 0.45 m / sec), it is determined that the HEPA filter is replaced, The filter has been replaced. However, this type of clean bench operation has a problem in that even though the filtering capability of the hepa filter is still sufficient, the expensive hepa filter is frequently replaced, resulting in excessive maintenance cost of the clean bench.

이러한 문제점을 해결하기 위하여 공개특허공보 제2005-81191호에서는 송풍기의 모터에 모터의 속도를 가감할 수 있는 제어부를 연결하고, 공기배출구와 헤파필터 사이에 헤파필터로부터 배출되는 공기의 압력을 감지하여 제어부에 출력하는 풍압센서를 설치하여, 헤파필터의 배출 공기압이 설정범위 미만으로 떨어지면, 모터를 가속하여 헤파필터의 배출 공기압이 설정범위 내로 유지되게 하는 콘베이어 일체형 크린 벤치를 개시하고 있다.In order to solve this problem, Korean Patent Laid-Open Publication No. 2005-81191 discloses a control unit capable of adjusting the speed of a motor to a motor of a blower, and detecting the pressure of air discharged from a hepa filter between an air outlet and a hepa filter. Disclosed is a conveyor-integrated clean bench which is provided with a wind pressure sensor output to a control unit and accelerates a motor to maintain the discharge air pressure of the hepa filter when the discharge air pressure of the hepa filter falls below the set range.

그러나, 이러한 제어방법에 의할 경우, 단순히 헤파필터의 배출 공기압을 일정하게 유지하는 데에만 초점을 맞춘 것으로 언제 필터를 교환해야 하느냐는 고려하고 있지 않다. 따라서, 실제 필터의 사용 수명을 늘릴지는 모르지만 정확한 필터 교환주기를 놓쳐 오히려 큰 피해를 볼 수 있다는 문제점이 있다.However, this control method focuses only on keeping the exhaust air pressure of the HEPA filter constant, and does not consider when the filter should be replaced. Therefore, although the service life of the actual filter may be extended, there is a problem in that a great damage can be seen by missing an accurate filter replacement cycle.

또한, 모터가 최대로 회전하는 경우에는 더 이상 모터를 가속할 수 없어 상기한 루틴에 따르면 적절한 필터 교환시기를 놓칠 수 있다.In addition, when the motor rotates to the maximum, the motor can no longer be accelerated, and according to the above routine, it is possible to miss an appropriate filter replacement time.

더욱이, 풍압센서가 고장인 경우에는 전혀 필터 교환시기를 알 수 없다는 치명적 결함이 있다.Moreover, there is a fatal flaw that the filter replacement time is not known at all when the wind pressure sensor is broken.

따라서, 본 발명의 목적은 다양한 조사항목에 의해 필터 교환주기를 검출하여 적절한 시기에 필터를 교환할 수 있도록 하는 것이다.Accordingly, it is an object of the present invention to detect filter replacement cycles by various investigation items so that filters can be replaced at an appropriate time.

본 발명의 다른 목적과 특징 및 이점은 이하에 서술되는 실시예를 통하여 더 구체적으로 설명될 것이다.Other objects, features and advantages of the present invention will be described in more detail with reference to the embodiments described below.

상기한 목적은, 누적 모터구동시간, 필터수명, 필터교환 예정일시, 및 풍속을 미리 설정하여 메모리에 저장하는 제 1 단계; 상기 설정된 누적 모터구동시간을 판독하여 상기 설정된 필터수명과 비교하여 큰 경우 필터교환을 표시하는 제 2 단계; 상기 제 2 단계에서 작은 것으로 판정된 경우, 현재일시를 상기 설정된 필터교환 예정일시와 비교하여 큰 경우 필터교환을 표시하는 제 3 단계; 상기 제 3 단계에서 작은 것으로 판정된 경우, 필터 후단에 설치된 풍속센서를 이용하여 배출되는 공기의 풍속을 검출하여 상기 설정된 풍속보다 작은지를 판정하는 제 4 단계; 상기 제 4 단계에서 작은 것으로 판정된 경우, 모터의 회전력을 검출하는 제 5 단계; 상기 검출된 모터 회전력이 최대값인 지를 판정하여 최대값이면 필터교환을 표시하는 제 6 단계; 및 최대값이 아닌 경우, 상기 모터의 회전력을 제어하는 제 7 단계로 이루어지는 크린 벤치의 필터 교환주기 검출방법에 의해 달성된다.The above object is a first step of setting in advance a cumulative motor driving time, filter life, scheduled filter replacement time, and wind speed in a memory; A second step of reading the set cumulative motor driving time and displaying a filter replacement when the set cumulative motor driving time is large compared with the set filter life; A third step of displaying a filter change when the current date and time are larger than the set filter replacement scheduled date and time, when it is determined as small in the second step; A fourth step of detecting whether the air velocity of the discharged air is smaller than the set wind speed by using a wind speed sensor installed at the rear end of the filter when it is determined to be smaller in the third step; A fifth step of detecting a rotational force of the motor when it is determined as small in the fourth step; A sixth step of determining whether the detected motor rotational force is the maximum value and displaying a filter change if the maximum value is reached; And a filter change period detection method of the clean bench, which is constituted of a seventh step of controlling the rotational force of the motor, if not the maximum value.

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도 1은 본 발명의 적용되는 크린 벤치(1)를 나타낸다.1 shows a clean bench 1 to which the present invention is applied.

도시된 바와 같이, 크린 벤치(1)는 상부 본체(11)와 상부본체(11)를 지지하는 하부본체(12)로 구성되는 본체(10)를 구비한다. 상부본체(11)는 전면이 개구된 'ㄷ'자 형상으로 그 상면과 하면이 지지대(14)로 연결되고, 작업자가 작업을 수행하는 작업대(13)가 하면 위에 형성된다.As shown, the clean bench 1 has a main body 10 composed of an upper main body 11 and a lower main body 12 supporting the upper main body 11. The upper body 11 is a 'c' shape of the front opening is connected to the upper and lower surfaces to the support 14, the work table 13 for the operator to perform the work is formed on the lower surface.

상부본체(11)의 전면에는 플레이트(20)가 설치되고 플레이트(20)에는 다수 개의 노즐(14)이 형성되어 본체(10) 내부로부터 클린 에어가 외부로 분사된다. 또한, 상부본체(11)의 전면에는 조작 패널(17)과 전기 콘센트(15)가 설치된다. 필요한 경우, 하부본체(12)에도 콘센트(16)를 설치할 수 있다.A plate 20 is installed on the front surface of the upper body 11 and a plurality of nozzles 14 are formed on the plate 20 so that clean air is injected from the inside of the main body 10 to the outside. In addition, the operation panel 17 and the electrical outlet 15 are provided on the front of the upper body (11). If necessary, the outlet 16 may also be installed in the lower body 12.

도 2는 도 1의 클린 에어 공급장치를 나타내는 구성도이다.FIG. 2 is a configuration diagram illustrating the clean air supply device of FIG. 1.

상부본체(11)의 전면 플레이트(20) 내부에는 헤파 필터(22)가 설치되고 전면 플레이트(20)와 헤파 필터(22) 사이에는 헤파 필터(22)로부터 배출되는 클린 에어의 풍속을 측정하는 풍속센서(28)가 설치된다.The HEPA filter 22 is installed inside the front plate 20 of the upper body 11, and the wind speed for measuring the air velocity of clean air discharged from the HEPA filter 22 between the front plate 20 and the HEPA filter 22. The sensor 28 is installed.

송풍기(24)와 헤파 필터(22) 간의 공기 흐름은 덕트(23)에 의해 안내되고, 송풍기(24)는 모터(26)에 의해 구동된다.The air flow between the blower 24 and the HEPA filter 22 is guided by the duct 23, and the blower 24 is driven by the motor 26.

본 발명에 따른 필터 교환주기 검출장치(30)는 풍속센서(28)로부터의 정보와 모터(26)로부터의 정보에 기초하여 필터 교환주기를 검출한다.The filter replacement period detecting device 30 according to the present invention detects the filter replacement period based on the information from the wind speed sensor 28 and the information from the motor 26.

도 3은 본 발명에 따른 필터 교환주기 검출장치의 구성을 나타내는 기능 블록도이다.3 is a functional block diagram showing the configuration of the filter replacement period detecting apparatus according to the present invention.

모터구동시간 검출부(32)는 모터(26)가 구동할 때마다 검출된 구동시간을 제어부(31)에 전달하고 제어부(31)는 모터 구동시간을 누적하여 메모리(36)에 저장한다.The motor driving time detector 32 transmits the detected driving time to the controller 31 each time the motor 26 is driven, and the controller 31 accumulates and stores the motor driving time in the memory 36.

필터교환 예정일시 입력부(33)는 사용자가 필터를 교환한 후 다음에 필터를 교환할 예정일시를 입력하도록 대기하며, 입력된 필터교환 예정일시를 제어부(31)에 전달하고, 제어부(31)는 전달받은 필터교환 예정일시를 메모리(36)에 저장한다.The scheduled filter replacement date input unit 33 waits for a user to input a scheduled date for exchanging a filter after replacing the filter, and transmits the input filter scheduled scheduled date to the control unit 31, and the control unit 31 The received filter replacement date and time are stored in the memory 36.

풍속검출부(34)는 풍속센서(28)에서 검출한 풍속을 디지털 변환하여 제어부(31)에 전달한다.The wind speed detector 34 digitally converts the wind speed detected by the wind speed sensor 28 and transmits it to the controller 31.

모터회전력 검출부(35)는 모터 구동시 모터(26)의 회전력을 검출하여 제어부(31)에 전달한다.The motor rotating power detector 35 detects the rotational force of the motor 26 when the motor is driven and transmits the rotational force to the controller 31.

설정부(37)는 사용자 입력에 따라 필터 교환주기의 검출을 위한 항목으로 모터구동시간, 필터교환 예정일시, 풍속 중 어느 것을 적용할 것인지를 설정한다. 또한, 사용자 입력에 따라 필터 수명을 고려한 시간을 설정하고, 다음에 필터를 교환할 예정일시를 설정하며, 또한, 헤파 필터로부터 배출되는 공기의 풍속값을 설정한다. 설정부(37)를 통하여 설정된 설정정보는 메모리(36)에 저장된다.The setting unit 37 sets which of the motor driving time, the scheduled filter replacement date, and the wind speed is applied as an item for detecting the filter replacement cycle according to the user input. In addition, a time in consideration of the filter life is set in accordance with the user input, a time when a filter is to be replaced next is set, and a wind speed value of air discharged from the HEPA filter is set. The setting information set through the setting unit 37 is stored in the memory 36.

메모리(36)는 EEPROM과 같이 소거가능한 비휘발성 메모리가 사용될 수 있으며, 상기 각 부분으로부터 제공되는 정보 값을 저장함과 동시에 사용자가 설정한 값을 저장한다.The memory 36 may use an erasable nonvolatile memory such as an EEPROM. The memory 36 stores a value set by a user while storing information values provided from the respective parts.

도 4는 본 발명에 따른 필터 교환주기 검출방법을 설명하는 플로차트이다. 이 실시예에서는 사용자가 설정부(37)를 통하여 모터구동시간, 필터교환 예정일시, 풍속 모두를 조사항목으로 설정한 경우를 예로 들어 설명한다.4 is a flowchart illustrating a method for detecting a filter change period according to the present invention. In this embodiment, the case where the user sets all the motor drive time, the filter replacement scheduled date, and the wind speed as a survey item through the setting unit 37 will be described as an example.

크린 벤치(1)가 구동되면, 필터 교환주기 검출장치(30)의 제어부(31)는 메모리(36)로부터 설정정보를 판독하여 조사할 항목을 불러들인다. 이 예에서는 모터구동시간, 필터교환 예정일시, 풍속 모두를 조사항목으로 설정하였기 때문에 이들 모 두에 대해 조사를 한다.When the clean bench 1 is driven, the control unit 31 of the filter change cycle detection device 30 reads the setting information from the memory 36 and retrieves the item to be examined. In this example, the motor drive time, filter replacement date, and wind speed are all set as survey items.

먼저, 제어부(31)는 모터구동시간 검출부(32)에 의해 제공되어 메모리(36)에 누적 저장된 총 모터구동시간을 판독한다(단계 S41).First, the control unit 31 reads the total motor driving time provided by the motor driving time detection unit 32 and accumulated and stored in the memory 36 (step S41).

이어, 판독한 총 모터구동시간과 메모리(36)에 저장된 기설정 필터 수명시간보다 큰 지를 판정한다(단계 S42). 즉, 크린 벤치(1)에 사용되는 모터(26)의 구동시간은 곧 필터의 이용시간이므로 필터의 수명시간에 기초하여 교환시기를 설정하고 이를 모터(26)의 구동시간을 통하여 간접적으로 비교할 수 있다.Then, it is determined whether or not the total motor driving time read out and the preset filter life time stored in the memory 36 are larger (step S42). That is, since the driving time of the motor 26 used for the clean bench 1 is the use time of the filter, it is possible to set an exchange time based on the life time of the filter and compare it indirectly through the driving time of the motor 26. have.

판정결과, 판독한 총 모터구동시간이 기설정된 필터 수명시간보다 큰 경우(단계 S42: 예), 필터의 수명이 다한 경우라고 판정하여 필터 교환을 표시한다(단계 S49). 반면, 판독한 총 모터구동시간이 기설정된 필터 수명시간보다 작은 경우(단계 S42: 아니오), 다음 단계로 진행하여 현재일시가 기설정된 필터교환 예정일시보다 큰 지를 판정한다(단계 S43).As a result of the determination, when the read total motor driving time is larger than the predetermined filter life time (step S42: YES), it is determined that the filter has reached the end of the life of the filter, and the filter replacement is displayed (step S49). On the other hand, if the read total motor driving time is smaller than the predetermined filter life time (step S42: NO), the flow advances to the next step to determine whether the current date and time is larger than the predetermined filter replacement time (step S43).

현재일시가 기설정된 필터교환 예정일시보다 큰 경우(단계 S43: 예), 필터의 수명이 다한 경우라고 판정하여 필터 교환을 표시한다(단계 S49). 반면, 현재일시가 기설정된 필터교환 예정일시보다 작은 경우(단계 S43: 아니오), 다음 단계로 넘어가 풍속을 검출한다(단계 S44).If the current date and time is larger than the predetermined filter replacement scheduled date (step S43: YES), it is determined that the filter has reached the end of its life (step S49). On the other hand, if the current date and time is smaller than the predetermined filter replacement scheduled date (step S43: NO), the flow advances to the next step to detect the wind speed (step S44).

즉, 상기한 바와 같이, 풍속검출부(34)는 전면 플레이트(20)와 헤파 필터(22) 사이에 설치된 풍속센서(28)로부터 풍속값을 제공받고 디지털 변환하여 제어부(31)에 전달한다.That is, as described above, the wind speed detector 34 receives the wind speed value from the wind speed sensor 28 installed between the front plate 20 and the HEPA filter 22, and digitally converts the wind speed value to the controller 31.

이어 제어부(31)는 메모리(36)에 저장된 기설정 풍속값을 판독하여 상기 풍 속검출부(34)로부터 전달된 검출 풍속값과 비교한다(단계 S45).Subsequently, the controller 31 reads the preset wind speed value stored in the memory 36 and compares it with the detected wind speed value transmitted from the wind speed detector 34 (step S45).

비교결과, 검출 풍속값이 기설정 풍속값보다 큰 경우(단계 S45: 아니오), 정상적인 것으로 판정하여 종료 처리한다. 반면, 검출 풍속값이 기설정 풍속값보다 작은 경우(단계 S45: 예), 모터의 회전력이 작거나 또는 필터가 오염으로 막힌 것이 그 원인일 수 있다.As a result of the comparison, when the detected wind speed value is larger than the preset wind speed value (step S45: NO), it is determined to be normal and the process ends. On the other hand, if the detected wind speed value is smaller than the preset wind speed value (step S45: YES), the cause may be that the rotational force of the motor is small or the filter is clogged with contamination.

이를 위해, 모터회전력 검출부(35)는 현재 모터(26)의 회전력을 검출한다(단계 S46). To this end, the motor rotational power detecting unit 35 detects the rotational force of the current motor 26 (step S46).

제어부(31)는 모터회전력 검출부(35)가 검출한 현재 모터(26)의 회전력이 최대값인지를 판정한다(단계 S47).The control part 31 determines whether the rotational force of the current motor 26 which the motor rotational power detection part 35 detected is the maximum value (step S47).

판정결과, 현재 모터의 회전력이 최대값이면(단계 S47: 예), 필터가 오염으로 막힌 것으로 판단하여 필터 교환을 표시한다(단계 S49). 반면, 현재 모터의 회전력이 최대값이 아니면(단계 S47: 아니오), 팬 속도를 제어하여(단계 S48) 회전력을 증가시킨다.As a result of the determination, if the rotational force of the current motor is the maximum value (step S47: YES), it is determined that the filter is clogged with contamination, and filter replacement is displayed (step S49). On the other hand, if the rotational force of the current motor is not the maximum value (step S47: NO), the fan speed is controlled (step S48) to increase the rotational force.

이상에서는 본 발명의 바람직한 실시예에 기초하여 설명하였지만, 당업자의 수준에서 다양한 변경이 가능하다.Although described above based on the preferred embodiment of the present invention, various changes are possible at the level of those skilled in the art.

가령, 풍속센서의 설치위치는 헤파필터의 후단에 적절한 곳으로 선택할 수 있다. 또한, 현재일시는 내장된 타이머를 이용하여 검출할 수 있다. 또한, 상기한 실시예는 모터구동시간, 필터교환 예정일시, 풍속 모두를 조사항목으로 설정한 경우를 예로 들었으나 상황에 따라 적절하게 조합하여 적용할 수 있다.For example, the installation position of the wind speed sensor can be selected to be suitable for the rear end of the HEPA filter. In addition, the current date and time can be detected using a built-in timer. In addition, the above-described embodiment is a case in which all of the motor drive time, the filter replacement date, and the wind speed are set as the survey items, but may be appropriately combined according to the situation.

따라서, 본 발명의 범위는 상기한 실시예에 한정되어서는 안 되며, 이하에 기재되는 특허청구범위에 의해 해석되어야 한다.Therefore, the scope of the present invention should not be limited to the above embodiments, but should be construed by the claims described below.

이상에서 설명한 바와 같이, 본 발명에 따르면 다양한 조사항목에 의해 필터 교환주기를 검출하여 적절한 시기에 필터를 교환할 수 있다는 이점이 있다.As described above, according to the present invention, there is an advantage in that the filter replacement cycle can be detected by various irradiation items and the filter can be replaced at an appropriate time.

또한, 어느 하나의 조사항목의 체크가 불가능하더라도 다른 조사항목을 통하여 필터교환 여부를 알 수 있어 필터교환 체크의 사각지대가 생기지 않는다는 이점이 있다.In addition, even if it is impossible to check any one of the survey items, it is possible to know whether or not the filter is exchanged through other survey items, so that there is no blind spot of the filter replacement check.

Claims (4)

삭제delete 삭제delete 누적 모터구동시간, 필터수명, 필터교환 예정일시, 및 풍속을 미리 설정하여 메모리에 저장하는 제 1 단계;A first step of setting in advance a cumulative motor driving time, a filter life, a scheduled filter replacement time, and a wind speed in a memory; 상기 설정된 누적 모터구동시간을 판독하여 상기 설정된 필터수명과 비교하여 큰 경우 필터교환을 표시하는 제 2 단계;A second step of reading the set cumulative motor driving time and displaying a filter replacement when the set cumulative motor driving time is large compared with the set filter life; 상기 제 2 단계에서 작은 것으로 판정된 경우, 현재일시를 상기 설정된 필터교환 예정일시와 비교하여 큰 경우 필터교환을 표시하는 제 3 단계;A third step of displaying a filter change when the current date and time are larger than the set filter replacement scheduled date and time, when it is determined as small in the second step; 상기 제 3 단계에서 작은 것으로 판정된 경우, 필터 후단에 설치된 풍속센서를 이용하여 배출되는 공기의 풍속을 검출하여 상기 설정된 풍속보다 작은지를 판정하는 제 4 단계;A fourth step of detecting whether the air velocity of the discharged air is smaller than the set wind speed by using a wind speed sensor installed at the rear end of the filter when it is determined to be smaller in the third step; 상기 제 4 단계에서 작은 것으로 판정된 경우, 모터의 회전력을 검출하는 제 5 단계;A fifth step of detecting a rotational force of the motor when it is determined as small in the fourth step; 상기 검출된 모터 회전력이 최대값인 지를 판정하여 최대값이면 필터교환을 표시하는 제 6 단계; 및A sixth step of determining whether the detected motor rotational force is the maximum value and displaying a filter change if the maximum value is reached; And 최대값이 아닌 경우, 상기 모터의 회전력을 제어하는 제 7 단계로 이루어지는 것을 특징으로 하는 크린 벤치의 필터 교환주기 검출방법.And the seventh step of controlling the rotational force of the motor, if not the maximum value. 삭제delete
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KR20170092802A (en) * 2016-02-04 2017-08-14 전자부품연구원 Management Method and System for Data Center Air Conditioner
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