KR20020082939A - Driving control apparatus for refrigerator using reciprocating compressor - Google Patents

Driving control apparatus for refrigerator using reciprocating compressor Download PDF

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Publication number
KR20020082939A
KR20020082939A KR1020010022063A KR20010022063A KR20020082939A KR 20020082939 A KR20020082939 A KR 20020082939A KR 1020010022063 A KR1020010022063 A KR 1020010022063A KR 20010022063 A KR20010022063 A KR 20010022063A KR 20020082939 A KR20020082939 A KR 20020082939A
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KR
South Korea
Prior art keywords
peak value
current peak
current
reciprocating compressor
tdc
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KR1020010022063A
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Korean (ko)
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KR100371197B1 (en
Inventor
황인영
박준형
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엘지전자 주식회사
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Priority to KR10-2001-0022063A priority Critical patent/KR100371197B1/en
Priority to US10/040,639 priority patent/US6623246B2/en
Priority to JP2002015744A priority patent/JP4213388B2/en
Priority to CNB021023786A priority patent/CN1242547C/en
Priority to IT2002MI000145A priority patent/ITMI20020145A1/en
Priority to DE10207511A priority patent/DE10207511B4/en
Publication of KR20020082939A publication Critical patent/KR20020082939A/en
Application granted granted Critical
Publication of KR100371197B1 publication Critical patent/KR100371197B1/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/06—Control using electricity
    • F04B49/065—Control using electricity and making use of computers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B35/00—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for
    • F04B35/04—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for the means being electric
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/12—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by varying the length of stroke of the working members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B2203/00—Motor parameters
    • F04B2203/04—Motor parameters of linear electric motors
    • F04B2203/0401—Current
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B2203/00—Motor parameters
    • F04B2203/04—Motor parameters of linear electric motors
    • F04B2203/0402—Voltage
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B2207/00—External parameters
    • F04B2207/04—Settings
    • F04B2207/046—Settings of length of piston stroke

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Control Of Positive-Displacement Pumps (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)

Abstract

PURPOSE: A method for controlling operation of refrigerator using reciprocating compressor is provided to efficiently operate the refrigerator. CONSTITUTION: A method includes the steps of: a first step comparing current impressed to a motor(M) with previously detected current to detect first current peak value where TDC(Top Dead Center)=0; a second step setting time for re-detection of current peak value where TDC=0 when load changes on the basis of a point of time of detection of the first current peak value of the first step; a third step operating a reciprocating compression part(L.COMP) by controlling turning on/off of a triac(Tr1) with switching control signal corresponding with the current peak value of the first step to determine whether the time for re-detection passes; and a fourth step detecting current peak value where TDC=0 again and controlling operation of a reciprocating compressor with switching control signal on the current peak value when the time for re-detection is determined to pass in the third step.

Description

왕복동식 압축기를 이용한 냉장고의 운전제어방법{DRIVING CONTROL APPARATUS FOR REFRIGERATOR USING RECIPROCATING COMPRESSOR}Operation control method of refrigerator using reciprocating compressor {DRIVING CONTROL APPARATUS FOR REFRIGERATOR USING RECIPROCATING COMPRESSOR}

본 발명은 왕복동식 압축기를 이용한 냉장고의 운전제어방법에 관한 것으로, 특히 냉장고와 주변환경의 변화에 따른 부하 변동에 능동적으로 대처하여 왕복동식 압축기가 항상 최적의 조건에서 운전되도록 한 왕복동식 압축기를 이용한 냉장고의 운전제어방법에 관한 것이다.The present invention relates to an operation control method of a refrigerator using a reciprocating compressor. In particular, the present invention relates to a method of controlling a refrigerator using a reciprocating compressor in which a reciprocating compressor is always operated under optimum conditions by actively dealing with load fluctuations caused by changes in the refrigerator and the surrounding environment. It relates to an operation control method of a refrigerator.

일반적인 왕복동식 압축기는, 다상의 고정자에 권취된 코일에 공급되는 전원을 스위칭소자를 이용하여 단속함으로써, 회전 토오크(TORQUE)를 발생시키게 되는데, 회전자와 고정자간의 여자상태를 순차적으로 가변시킴으로써, 자기 흡입력에 의하여 정방향 회전 토오크를 발생시킬 수 있다.In general, a reciprocating compressor generates a torque by interrupting the power supplied to a coil wound around a multi-phase stator by using a switching element. By sequentially changing the excitation state between the rotor and the stator, The forward rotational torque can be generated by the suction force.

만약, 특정 여자상태를 가변시키지 않을 때에는 일정 위치에서 회전자가 정지하도록 할 수 있으며, 최대 인덕턴스 형상을 기점으로 스위칭소자에 인가되는 입력펄스 신호의 위상을 제어함으로써 역회전력을 발생시킬 수 있는 다양한 구동제어가 가능함에 따라 방향 제어가 필요한 전자 제품들에 적용되어 사용되고 있다.If the specific excitation state is not changed, the rotor can be stopped at a predetermined position, and various drive control that can generate reverse power by controlling the phase of the input pulse signal applied to the switching element based on the maximum inductance shape. As is possible, it is applied to electronic products requiring direction control.

특히, 냉장고나 에어컨에 사용되는 왕복동식 압축기는, 모터에 인가되는 전압으로 압축비를 가변할 수 있고, 따라서 냉력을 사용자의 의도에 따라 가변하여 제어하는 장점이 있는 것으로, 이와 같은 왕복동식 압축기를 첨부한 도면을 참조하여 상세히 설명한다.In particular, the reciprocating compressor used in the refrigerator or the air conditioner can vary the compression ratio by the voltage applied to the motor, and thus has the advantage of controlling the cooling power according to the user's intention. It will be described in detail with reference to one drawing.

도1은 일반적인 왕복동식 압축기의 운전제어장치에 대한 구성을 보인 블록도로서, 이에 도시된 바와같이 스트로크 지령치에 따라, 내부 모터에 인가되는 전압에 의해, 피스톤이 상하운동으로 스트로크를 가변시켜 냉력을 조절하는 왕복동식 압축부(L.COMP)와; 인가전압에 의해 스트로크를 증가시킴에 따라, 상기 왕복동식 압축부(L.COMP)에 발생하는 전압을 검출하는 전압검출부(30)와; 인가전압에 의해 스트로크를 증가시킴에 따라, 상기 왕복동식 압축부(L.COMP)에 인가되는 전류를 검출하는 전류 검출부(20)와; 상기 전압검출부(30) 및 전류 검출부(20)로부터 검출된 전압과 전류로 스트로크를 계산하고, 그 스트로크를 스트로크지령치와 비교하여 그에 따른 스위칭제어신호를 출력하는 마이크로컴퓨터(40)와; 상기 마이크로컴퓨터 (40)의 스위칭제어신호에 따라, 교류전원을 트라이악(Tr1)으로 단속시켜 상기 왕복동식 압축부(L.COMP)에 전압을 인가하는 전기회로부(10)로 구성되고, 이와같이 구성된 종래 장치의 동작을 설명한다.1 is a block diagram showing a configuration of an operation control device of a general reciprocating compressor. As shown in FIG. 1, the piston changes the stroke in vertical motion by the voltage applied to the internal motor according to the stroke command value. A reciprocating compression unit (L.COMP) for adjusting; A voltage detector (30) which detects a voltage generated in the reciprocating compression section (L.COMP) as the stroke is increased by an applied voltage; A current detector 20 which detects a current applied to the reciprocating compressor L.COMP as the stroke is increased by an applied voltage; A microcomputer (40) for calculating a stroke from the voltage and current detected by the voltage detector (30) and the current detector (20), comparing the stroke with a stroke command value, and outputting a switching control signal accordingly; In accordance with the switching control signal of the microcomputer 40, it consists of an electrical circuit section 10 for interrupting the AC power to the triac (Tr1) to apply a voltage to the reciprocating compression section (L.COMP), and thus The operation of the conventional apparatus will be described.

먼저, 왕복동식 압축부(L.COMP)는 사용자에 의해 설정된 스트로크 지령치에 따른 인가전압에 의해, 피스톤이 상하 운동되고, 이로 인해 스트로크가 가변되어 냉력을 조절한다.First, the reciprocating compression section (L.COMP), the piston is moved up and down by the applied voltage according to the stroke command value set by the user, thereby the stroke is variable to adjust the cooling force.

한편, 전기회로부(10)의 트라이악(Tr1)은 마이크로컴퓨터(40)의 스위칭제어신호에 의해 턴온 주기가 길어짐에 의해 스트로크가 증가되는데, 이때 왕복동식 압축부(L.COMP)의 모터(M)에 인가되는 인가전압과 전류를 각기 전압검출부(30)와 전류검출부(20)에서 검출하여 이를 마이크로컴퓨터(40)에 인가한다.Meanwhile, the stroke of the triac Tr1 of the electric circuit unit 10 is increased due to a long turn-on period due to the switching control signal of the microcomputer 40, wherein the motor M of the reciprocating compressor L.COMP is increased. The voltage and the current applied to the) are detected by the voltage detector 30 and the current detector 20, and applied to the microcomputer 40.

그러면, 상기 마이크로컴퓨터(40)는 상기 전압검출부(30)와 전류검출부(20)로부터 검출된 인가전압과 전류를 이용하여 스트로크를 계산한후, 이 스트로크를스트로크지령치와 비교하여 그에 따라 스위칭제어신호를 출력한다.Then, the microcomputer 40 calculates a stroke using the applied voltage and current detected from the voltage detector 30 and the current detector 20, and compares the stroke with the stroke command value and accordingly switches the control signal. Outputs

즉, 상기 마이크로컴퓨터(40)는 계산된 스트로크가 스트로크 지령치 보다 작으면, 트라이악(Tr1)의 온주기를 길게 하는 스위칭제어신호를 출력하여 왕복동식 압축부(L.COMP)에 인가되는 전압을 증가시킨다.That is, when the calculated stroke is smaller than the stroke command value, the microcomputer 40 outputs a switching control signal for lengthening the on-cycle of the triac Tr1, thereby converting the voltage applied to the reciprocating compressor L.COMP. Increase.

상술한 바와 달리, 상기 마이크로컴퓨터(40)는 계산된 스트로크가 스트로크 지령치 보다 크면, 트라이악(Tr1)의 온주기를 짧게 하는 스위칭제어신호를 출력하여 왕복동식 압축부(L.COMP)에 인가되는 전압을 감소시킨다.Unlike the above, when the calculated stroke is larger than the stroke command value, the microcomputer 40 outputs a switching control signal for shortening the on-cycle of the triac Tr1 and is applied to the reciprocating compression unit L.COMP. Reduce the voltage.

그러나, 상술한 바와같이 같이 동작하는 왕복동식 압축기는, 기구적 운동 특성이 심한 비선형성을 가지고 있으므로 그 비선형성을 감안하지 않는 선형적인 제어 방법으로는 정밀 제어가 불가능한 문제점이 있다.However, since the reciprocating compressor operating as described above has a nonlinearity in which the mechanical motion characteristics are severe, there is a problem that precise control is impossible with a linear control method that does not take into account the nonlinearity.

이를 해결하기 위하여, 왕복동식 압축기의 최적의 운전조건이 TDC=0인 지점을 검출하여 그 지점에서의 스위칭제어신호로 운전을 제어하여 운전효율을 향상시키지만, 이때 최초 검출한 스위칭제어신호로 왕복동식 압축기를 소정 시간동안 계속하여 운전할 경우에는 냉장고와 주변환경의 변화에 따른 부하변동에 의해 피스톤의 위치가 TDC=0에서 벗어나게 되는 문제점이 있다.In order to solve this problem, the optimum operation condition of the reciprocating compressor is detected by TDC = 0 and the operation is controlled by the switching control signal at the point to improve the operation efficiency. When the compressor is continuously operated for a predetermined time, there is a problem that the position of the piston is out of TDC = 0 due to the load change caused by the change of the refrigerator and the surrounding environment.

본 발명은 상기와 같은 문제점을 해결하기 위하여 안출된 것으로, 최초 TDC=0인 전류피크치에 해당되는 듀티비를 가진 스위칭제어신호로 운전하다가 일정시간이 지나면 다시 TDC=0인 전류피크치를 검출함으로써 냉장고를 효율적으로 운전하도록 한 왕복동식 압축기를 이용한 냉장고의 운전제어방법을 제공함에 그 목적이있다.The present invention has been made to solve the above problems, the operation by switching to a control signal having a duty ratio corresponding to the current peak value of the first TDC = 0, the refrigerator by detecting the current peak value of TDC = 0 again after a certain time It is an object of the present invention to provide a operation control method of a refrigerator using a reciprocating compressor to efficiently operate a.

도1은 종래 왕복동식 압축기의 운전제어장치에 대한 구성을 보인 회로도.1 is a circuit diagram showing a configuration for an operation control apparatus of a conventional reciprocating compressor.

도2는 본 발명 왕복동식 압축기를 이용한 냉장고의 운전제어방법이 적용되는 장치의 구성을 보인 회로도.Figure 2 is a circuit diagram showing the configuration of the apparatus to which the operation control method of the refrigerator using the reciprocating compressor of the present invention is applied.

도3은 도2에 있어서, 스위칭제어신호의 듀티비를 증가시킴에 따른 전류파형을 보인도.FIG. 3 is a diagram showing a current waveform as the duty ratio of the switching control signal is increased in FIG. 2; FIG.

도4는 도2에 있어서, 시간에 따른 전류값의 변화를 보인도.4 is a view showing a change in the current value with time in FIG.

상기와 같은 목적을 달성하기 위한 본 발명은 스트로크 지령치에 따른 인가 전압에 의해, 피스톤이 상하운동으로 스트로크를 가변시켜 냉력을 조절하는 왕복동식 압축기를 채용한 냉장고에 있어서, 모터에 인가되는 전류를 이전에 검출된 전류와 비교하여 TDC=0인 최초 전류 피크치를 검출하는 제1 단계와; 상기 제1 단계의 최초 전류피크치의 검출 시점을 기준으로, 부하 변동시 다시 TDC=0인 전류피크치를 검출하기 위한 재검출시간을 설정하는 제2 단계와; 상기 제1 단계의 전류피크치에 해당되는 스위칭제어신호로 트라이악의 온/오프를 제어하여 왕복동식 압축부를 운전하면서 재검출시간이 경과되는지를 판단하는 제3 단계와; 상기 제3 단계의 판단결과, 재검출시간이 경과되면, 다시 TDC=0인 전류피크치를 검출하여 그 전류피크치에서의 스위칭제어신호로 왕복동식 압축기의 운전을 제어하는 제4 단계로 수행함을 특징으로 한다.The present invention for achieving the above object, in the refrigerator employing a reciprocating compressor that adjusts the cooling force by varying the stroke in the vertical movement of the piston by the applied voltage according to the stroke command value, transfer the current applied to the motor A first step of detecting an initial current peak value of TDC = 0 compared to the current detected at; A second step of setting a redetection time for detecting a current peak value of TDC = 0 again when the load fluctuates based on a detection time point of the initial current peak value of the first step; A third step of determining whether the redetection time has elapsed while controlling the on / off of the triac with the switching control signal corresponding to the current peak value of the first step to operate the reciprocating compression unit; As a result of the determination in the third step, if the redetection time has elapsed, the current peak value of TDC = 0 is detected again, and the fourth step of controlling the operation of the reciprocating compressor with the switching control signal at the current peak value is performed. do.

이하, 본 발명에 의한 왕복동식 압축기를 이용한 냉장고의 운전제어방법에 대한 작용 및 효과를 첨부한 도면을 참조하여 상세히 설명한다.Hereinafter, the operation and effect of the operation control method of the refrigerator using the reciprocating compressor according to the present invention will be described in detail with reference to the accompanying drawings.

도2는 본 발명 왕복동식 압축기를 이용한 냉장고의 운전제어방법이 적용되는 장치의 구성을 보인 회로도로서, 이에 도시한 바와같이 모터에 인가되는 전류를 검출하는 전류검출부(20)와; 상기 전류검출부(20)의 검출전류를 이전에 검출된 전류와 비교하여 그에 따라 전류피크치검출신호를 출력하는 전류피크치검출부(100)와; 상기 전류피크치검출부(100)로부터 전류피크치 검출신호가 입력되면 그 전류피크치가 유지되도록 스위칭제어신호를 출력하는 마이크로컴퓨터(40)와; 상기 마이크로컴퓨터(40)의 스위칭제어신호에 따라, 교류전원을 트라이악 (Tr1)으로 단속시켜 왕복동식 압축부(L.COMP)에 전압을 인가하는 전기회로부(10)로 구성하며, 이와같이 구성한 본 발명의 동작을 설명한다.FIG. 2 is a circuit diagram showing the configuration of an apparatus to which the operation control method of a refrigerator using the reciprocating compressor of the present invention is applied, and as shown therein, a current detecting unit 20 for detecting a current applied to a motor; A current peak detection unit (100) for comparing the detected current of the current detection unit (20) with a previously detected current and outputting a current peak detection signal accordingly; A microcomputer 40 for outputting a switching control signal so that the current peak value is maintained when the current peak detection signal is input from the current peak detection unit 100; In accordance with the switching control signal of the microcomputer 40, it consists of an electric circuit section 10 for interrupting the AC power to the triac (Tr1) to apply a voltage to the reciprocating compression section (L.COMP). The operation of the invention will be described.

먼저, 왕복동식 압축부(L.COMP)는 사용자에 의해 설정된 스트로크 지령치에 따른 스트로크전압에 의해, 피스톤이 상하 운동되고, 이로 인해 스트로크가 가변되어 냉력을 조절한다.First, the reciprocating compression section (L.COMP), the piston is moved up and down by the stroke voltage according to the stroke command value set by the user, thereby the stroke is variable to adjust the cooling force.

즉, 전기회로부(10)의 트라이악(Tr1)이 마이크로컴퓨터(40)의 스위칭제어신호에 따라 턴온 주기가 길어짐에 의해 스트로크가 증가되면, 그 스트로크에 의해 왕복동식 압축부(L.COMP)가 구동된다.That is, when the triac Tr1 of the electric circuit unit 10 increases the stroke due to the longer turn-on period according to the switching control signal of the microcomputer 40, the reciprocating compression unit L.COMP Driven.

이때, 전류검출부(20)는 상기 왕복동식 압축부(L.COMP)에 인가되는 전류를 검출하여 이를 전류피크치검출부(100)에 인가하고, 이에 따라 상기 전류피크치검출부(100)는 상기 전류검출부(20)로부터 검출전류를 입력받아 이를 이전 검출전류와 비교하여 그에 따른 전류피크치 검출신호를 출력하는데, 즉 상기 전류피크치검출부 (100)는 현재 검출전류와 이전 검출전류를 비교하여, 그 비교결과 이전 검출전류가 현재 검출전류보다 크면 그 시점을 전류 피크치로 인식하여 그에 따른 전류피크치검출신호를 출력한다.At this time, the current detection unit 20 detects the current applied to the reciprocating compression unit (L.COMP) and applies it to the current peak detection unit 100, accordingly, the current peak detection unit 100 is the current detection unit ( 20) receives the detection current from the current and compares it with the previous detection current and outputs the current peak detection signal accordingly, that is, the current peak detection unit 100 compares the current detection current with the previous detection current, and detects the previous detection result. If the current is larger than the current detection current, the point of time is recognized as the current peak value and the current peak detection signal is output accordingly.

그러면, 마이크로컴퓨터(40)는 상기 전류피크치 검출신호를 입력받아 그 전류파형의 피크치가 유지되도록 그 전류피크치 검출신호가 입력되는 시점에 해당되는 듀티비를 가진 스위칭제어신호를 전기회로부(10)에 인가한다.Then, the microcomputer 40 receives the current peak detection signal and transmits a switching control signal having a duty ratio corresponding to the point in time at which the current peak detection signal is input to the electric circuit unit 10 so that the peak value of the current waveform is maintained. Is authorized.

이에 따라, 전기회로부(10)는 상기 마이크로컴퓨터(40)의 스위칭제어신호에 의해, 교류전원을 트라이악(Tr1)으로 단속시켜 상기 왕복동식 압축부(L.COMP)에 전압을 인가하여 그 왕복동식 압축부(L.COMP)의 운전을 제어한다.Accordingly, the electric circuit unit 10 regulates the AC power to the triac Tr1 by the switching control signal of the microcomputer 40 to apply a voltage to the reciprocating compression unit L.COMP, thereby Controls the operation of the L.COMP.

여기서, 도3은 스위칭제어신호의 듀티비를 증가시킴에 따른 전류파형의 변화를 나타낸 것으로, 실험에 의해 전류파형의 피크치가 발생하는 구간이 TDC가 '0'인 지점임을 알 수 있다.3 shows a change in the current waveform as the duty ratio of the switching control signal is increased, and it can be seen from the experiment that the section where the peak value of the current waveform occurs is the point where the TDC is '0'.

여기서, 냉장고의 주변환경의 변화에 따라, 도4와 같이 왕복동식 압축기에 가해지는 부하가 변동되는데, 본 발명은 냉장고를 효율적으로 운전하기 위하여 TDC=0인 최초 전류피크치를 검출한 시점을 기준으로 TDC=0인 전류피크치를 재검출하기 위한 재검출시간을 설정한후, 그 최초 전류피크치에서의 스위칭제어신호로 왕복동식 압축기의 운전을 제어하다가, 재검출시간이 되면, 다시 TDC=0인 전류피크치를 검출하여 그 전류피크치에서의 스위칭제어신호로 왕복동식압축기의 운전을 제어한다.Here, the load applied to the reciprocating compressor is changed as shown in FIG. 4 according to the change of the surrounding environment of the refrigerator. The present invention is based on the point of time when the initial current peak value of TDC = 0 is detected in order to operate the refrigerator efficiently. After setting the redetection time for redetecting the current peak value of TDC = 0, the operation of the reciprocating compressor is controlled by the switching control signal at the initial current peak value. The peak value is detected and the operation of the reciprocating compressor is controlled by the switching control signal at the current peak value.

즉, TDC=0인 전류피크치에서의 스위칭제어신호로 왕복동식 압축기의 운전을 제어하다가, 기설정된 재검출시간이 되면 다시 TDC=0인 전류피크치를 검출하여 왕복동식 압축기의 운전을 제어하는데, 이와 같은 동작을 재검출 시간마다 반복 수행한다.That is, the operation of the reciprocating compressor is controlled by the switching control signal at the current peak value of TDC = 0, and when the preset redetection time is reached, the current peak value of TDC = 0 is detected again to control the operation of the reciprocating compressor. The same operation is repeated for each redetection time.

보다 상세하게 본 발명을 설명하면, 우선 최적의 운전조건으로 TDC=0인 최초 전류피크치를 검출한후, 그 전류피크치 검출시점을 기준으로 소정시간이 지나면 다시 TDC=0인 전류피크치를 검출하기 위한 재검출시간을 설정한다.In more detail, the present invention will first detect the initial current peak value of TDC = 0 as the optimum operating condition, and then detect the current peak value of TDC = 0 again after a predetermined time from the point of time when the current peak value is detected. Set the redetection time.

그 다음, 왕복동식 압축기에 대한 최적의 운전조건인 TDC=0인 최초 전류 피크치에서의 스위칭제어신호로 트라이악(Tr1)의 온/오프를 제어하면서 왕복동식 압축부(L.COMP)를 운전시킨다.Then, the reciprocating compressor L.COMP is operated while controlling the on / off of the triac Tr1 with a switching control signal at the initial current peak value of TDC = 0, which is an optimum operating condition for the reciprocating compressor. .

여기서, 상기 최초 전류 피크치에서의 스위칭제어신호로 상기 왕복동식 압축부(L.COMP)를 계속하여 운전하게 되면, 소정 시간 경과후, 냉장고와 주변환경의 변화에 따라 도4와 같이 부하의 변동이 발생하게 된다.Here, if the reciprocating compressor (L.COMP) is continuously operated with the switching control signal at the initial current peak value, after a predetermined time elapses, the load fluctuation is changed according to the change in the refrigerator and the surrounding environment. Will occur.

이에 따라, 상기 왕복동식 압축부(L.COMP)를 상기 최초 전류피크치에서의 스위칭제어신호로 운전하다가 재검출시간이 되면, 다시 TDC=0인 전류피크치를 검출한후, 그 검출 전류피크치에서의 스위칭제어신호로 왕복동식 압축부(L.COMP)의 운전을 제어한다.Accordingly, when the reciprocating compressor L.COMP is operated with the switching control signal at the initial current peak value and the redetection time comes, the current peak value of TDC = 0 is detected again, and then the The switching control signal controls the operation of the reciprocating compressor L.COMP.

여기서, 상기 TDC=0인 전류피크치가 검출되면 그 검출시점에 자동으로 타이머가 셋되어 재검출시간을 카운팅한다.Here, when the current peak value of TDC = 0 is detected, a timer is automatically set at the time of detection to count the redetection time.

다시 말해서, 본 발명은 냉장고나 주변환경에 의한 부하변동을 감안하여, 왕복동식 압축기의 최적의 운전 조건인 TDC=0인 최초 전류피크치의 스위칭제어신호로 왕복동식 압축기를 운전하다가, 사용자에 의해 기설정된 재검출시간이 되면 다시 TDC=0인 전류피크치를 검출하여 그 전류피크치에서의 스위칭제어신호로 왕복동식 압축기를 운전시킨다.In other words, the present invention allows the user to operate the reciprocating compressor with a switching control signal of the initial current peak value of TDC = 0, which is an optimum operating condition of the reciprocating compressor, in consideration of load fluctuations caused by the refrigerator or the surrounding environment. When the set redetection time is reached, a current peak value of TDC = 0 is detected again and the reciprocating compressor is operated with a switching control signal at the current peak value.

이상에서 상세히 설명한 바와같이 본 발명은 왕복동식 압축기를 냉장고에 적용하여 운전시킬 경우에, 기구적인 특성에 의한 비선형적 특성을 감지하기 위해,TDC=0인 최초 전류 피크치를 검출하여 그 최초 전류피크치에서의 스위칭제어신호로 왕복동식압축기를 운전하다가 기설정된 재검출시간이 되면, 다시 최적의 운전조건으로 TDC=0인 전류피크치를 검출하여 그 전류피크치에서의 스위칭제어신호로 트라이악의 온/오프를 제어함으로써 냉장고의 왕복동식 압축기가 항상 TDC=0인 최적의 상태로 운전되는 효과가 있다.As described in detail above, when the reciprocating compressor is operated in a refrigerator, the present invention detects an initial current peak value of TDC = 0 and detects a non-linear characteristic due to mechanical characteristics. When the reciprocating compressor is operated with the switching control signal of, when the preset redetection time comes, the current peak value of TDC = 0 is again detected as the optimum operating condition, and the triac on / off is controlled by the switching control signal at the current peak value. As a result, the reciprocating compressor of the refrigerator is always operated in an optimal state where TDC = 0.

Claims (2)

스트로크 지령치에 따른 인가 전압에 의해, 피스톤이 상하운동으로 스트로크를 가변시켜 냉력을 조절하는 왕복동식 압축기를 채용한 냉장고에 있어서,In a refrigerator employing a reciprocating compressor in which the piston changes the stroke in vertical motion by an applied voltage according to the stroke command value, thereby adjusting the cooling power. 모터에 인가되는 전류를 이전에 검출된 전류와 비교하여 TDC=0인 최초 전류 피크치를 검출하는 제1 단계와;A first step of detecting an initial current peak value of TDC = 0 by comparing a current applied to the motor with a previously detected current; 상기 제1 단계의 최초 전류피크치의 검출 시점을 기준으로, 부하 변동시 다시 TDC=0인 전류피크치를 검출하기 위한 재검출시간을 설정하는 제2 단계와;A second step of setting a redetection time for detecting a current peak value of TDC = 0 again when the load fluctuates based on a detection time point of the initial current peak value of the first step; 상기 제1 단계의 전류피크치에 해당되는 스위칭제어신호로 트라이악의 온/오프를 제어하여 왕복동식 압축부를 운전하면서 재검출시간이 경과되는지를 판단하는 제3 단계와;A third step of determining whether the redetection time has elapsed while controlling the on / off of the triac with the switching control signal corresponding to the current peak value of the first step to operate the reciprocating compression unit; 상기 제3 단계의 판단결과, 재검출시간이 경과되면, 다시 TDC=0인 전류피크치를 검출하여 그 전류피크치에서의 스위칭제어신호로 왕복동식 압축기의 운전을 제어하는 제4 단계로 수행함을 특징으로 하는 왕복동식 압축기를 이용한 냉장고의 운전제어방법.As a result of the determination in the third step, if the redetection time has elapsed, the current peak value of TDC = 0 is detected again, and the fourth step of controlling the operation of the reciprocating compressor with the switching control signal at the current peak value is performed. Operation control method of the refrigerator using a reciprocating compressor. 제1 항에 있어서, TDC=0인 전류피크치가 검출되면 그 검출시점에 자동으로 타이머가 셋되어 재검출시간을 카운팅하는 단계가 포함되는 것을 특징으로 하는 왕복동식 압축기를 이용한 냉장고의 운전제어방법.The operation control method of a refrigerator using a reciprocating compressor according to claim 1, further comprising a step of counting a redetection time by automatically setting a timer when a current peak value of TDC = 0 is detected.
KR10-2001-0022063A 2001-04-13 2001-04-24 Driving control apparatus for refrigerator using reciprocating compressor KR100371197B1 (en)

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Application Number Priority Date Filing Date Title
KR10-2001-0022063A KR100371197B1 (en) 2001-04-24 2001-04-24 Driving control apparatus for refrigerator using reciprocating compressor
US10/040,639 US6623246B2 (en) 2001-04-13 2002-01-09 Apparatus and method for controlling operation of linear motor compressor
JP2002015744A JP4213388B2 (en) 2001-04-13 2002-01-24 Operation control device and operation control method for reciprocating compressor
CNB021023786A CN1242547C (en) 2001-04-13 2002-01-24 Device and method for controlling running of compressor of linear motor
IT2002MI000145A ITMI20020145A1 (en) 2001-04-13 2002-01-29 DEVICE AND PROCEDURE FOR CHECKING THE OPERATION OF A LINEAR MOTOR-COMPRESSOR
DE10207511A DE10207511B4 (en) 2001-04-13 2002-02-22 Apparatus and method for controlling the operation of a linear motor compressor

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100815424B1 (en) * 2005-04-06 2008-03-20 엘지전자 주식회사 Capacity variableness driving control method for refrigerator in using reciprocating compressor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100815424B1 (en) * 2005-04-06 2008-03-20 엘지전자 주식회사 Capacity variableness driving control method for refrigerator in using reciprocating compressor

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