KR100595549B1 - Compressor driving apparatus and method of refrigerator with reciprocating compressor - Google Patents

Compressor driving apparatus and method of refrigerator with reciprocating compressor Download PDF

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KR100595549B1
KR100595549B1 KR1020040011488A KR20040011488A KR100595549B1 KR 100595549 B1 KR100595549 B1 KR 100595549B1 KR 1020040011488 A KR1020040011488 A KR 1020040011488A KR 20040011488 A KR20040011488 A KR 20040011488A KR 100595549 B1 KR100595549 B1 KR 100595549B1
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compressor
refrigerator
control signal
power supply
control unit
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KR1020040011488A
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Korean (ko)
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KR20050082884A (en
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최기철
박경배
홍언표
허종태
곽태희
기성현
김용수
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엘지전자 주식회사
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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
    • F25D29/005—Mounting of control devices
    • 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
    • F04B49/02—Stopping, starting, unloading or idling control
    • 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
    • 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
    • F25B31/00—Compressor arrangements
    • F25B31/02—Compressor arrangements of motor-compressor units
    • F25B31/023—Compressor arrangements of motor-compressor units with compressor of reciprocating-piston type
    • 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
    • F25B49/00—Arrangement or mounting of control or safety devices
    • F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
    • F25B49/022—Compressor control arrangements
    • 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
    • F25B49/00—Arrangement or mounting of control or safety devices
    • F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
    • F25B49/025—Motor control arrangements
    • 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
    • F04B2207/03—External temperature
    • 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
    • F25B2600/024—Compressor control by controlling the electric parameters, e.g. current or voltage
    • 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
    • F25B2700/00—Sensing or detecting of parameters; Sensors therefor
    • F25B2700/15—Power, e.g. by voltage or current
    • F25B2700/151—Power, e.g. by voltage or current of the compressor motor
    • 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
    • F25B2700/00—Sensing or detecting of parameters; Sensors therefor
    • F25B2700/21—Temperatures
    • F25B2700/2104—Temperatures of an indoor room or compartment

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Control Of Positive-Displacement Pumps (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)

Abstract

본 발명은 왕복동식 압축기를 채용한 냉장고의 압축기 구동장치 및 방법에 관한 것으로, 과전압이 인가되어도 리액터를 이용하여 임피던스를 증가시킴으로써, 스트로크를 감소시켜 압축기를 구동하여 냉력을 발생시키도록 한 것이다. 이를 위하여 본 발명은 냉장고내의 온도를 검출하여, 그 검출온도가 일정온도 이하이면 압축기를 구동시키기 위한 제어신호를 출력하는 냉장고 제어부와; 상기 냉장고 제어부의 제어신호에 의해 온/오프되어, 압축기측으로 전원을 공급하는 메인 릴레이와; 정상운전시, 스위칭제어신호에 의해 구동커패시터에 연결되어, 압축기를 정상적으로 운전시키고, 과전압 발생시, 스위칭제어신호에 의해 리액터측으로 연결되어, 스트로크를 감소시키는 스위치와; 전원전압을 기준전압과 비교하고, 그 비교결과에 근거하여 상기 스위치를 제어하기 위한 스위칭제어신호를 출력하는 압축기 제어부를 포함하여 구성한다.The present invention relates to a compressor driving apparatus and method for a refrigerator employing a reciprocating compressor, and to increase the impedance by using a reactor even when an overvoltage is applied, thereby reducing the stroke to drive the compressor to generate a cooling force. To this end, the present invention includes a refrigerator control unit for detecting a temperature in the refrigerator and outputting a control signal for driving the compressor when the detected temperature is below a predetermined temperature; A main relay turned on / off by a control signal of the refrigerator control unit and supplying power to a compressor side; A switch connected to the drive capacitor by a switching control signal during normal operation to operate the compressor normally, and connected to the reactor side by a switching control signal when an overvoltage occurs to reduce the stroke; And a compressor control unit for comparing the power supply voltage with a reference voltage and outputting a switching control signal for controlling the switch based on the comparison result.

Description

왕복동식 압축기를 채용한 냉장고의 압축기 구동장치 및 방법{COMPRESSOR DRIVING APPARATUS AND METHOD OF REFRIGERATOR WITH RECIPROCATING COMPRESSOR}Compressor Driving Apparatus and Method of Refrigerator Adopting Reciprocating Compressor {COMPRESSOR DRIVING APPARATUS AND METHOD OF REFRIGERATOR WITH RECIPROCATING COMPRESSOR}

도1은 종래 왕복동식 압축기를 채용한 냉장고의 압축기 구동장치에 대한 실시예의 구성을 보인 블록도.1 is a block diagram showing an embodiment of a compressor driving apparatus of a refrigerator employing a conventional reciprocating compressor.

도2는 본 발명 왕복동식 압축기를 채용한 냉장고의 압축기 구동장치에 대한 실시예의 구성을 보인 블록도.2 is a block diagram showing an embodiment of a compressor driving apparatus of a refrigerator employing the reciprocating compressor of the present invention;

도3은 본 발명 왕복동식 압축기를 채용한 냉장고의 압축기 구동방법에 대한 동작흐릅도. 3 is an operation flowchart of a compressor driving method of a refrigerator employing the reciprocating compressor of the present invention.

*****도면의 주요부분에 대한 부호의 설명********** Description of the symbols for the main parts of the drawings *****

10:냉장고 제어부 20:압축기 제어부10: refrigerator control unit 20: compressor control unit

본 발명은 왕복동식 압축기를 채용한 냉장고의 압축기 구동장치 및 방법에 관한 것으로, 특히 과전압이 인가되어도 리액터를 이용하여 임피던스를 증가시킴으로써, 스트로크를 감소시켜 압축기를 구동하여 냉력을 발생시키도록 한 왕복동식 압축기를 채용한 냉장고의 압축기 구동장치 및 방법에 관한 것이다.The present invention relates to a compressor driving apparatus and method for a refrigerator employing a reciprocating compressor, and in particular, even when an overvoltage is applied, a reciprocating type for generating a cooling force by driving a compressor by reducing a stroke by increasing an impedance using a reactor. A compressor driving apparatus and method for a refrigerator employing a compressor.

일반적으로, 왕복동식 압축기(Reciprocating Compressor)는 피스톤이 실린더의 내부에서 선형으로 왕복운동을 하면서 냉매가스를 흡입 압축하여 토출하는 것으로, 보다 구체적으로는 피스톤을 구동하는 방식에 따라 레시프로(Recipro) 방식과 리니어(Linear) 방식으로 구분할 수 있다.In general, a reciprocating compressor (Reciprocating Compressor) is a piston in a cylinder reciprocating linearly in the inside of the cylinder to suck and compress the refrigerant gas and discharge, more specifically, according to the method of driving the piston (Recipro) method It can be divided into and linear method.

레시프로(Recipro) 방식은 회전모터에 크랭크 샤프트를 결합하고 이 크랭크 샤프트에 피스톤을 결합하여 회전모터의 회전력을 직선 왕복운동으로 전환하는 방식인데 반하여, 리니어(Linear) 방식은 직선모터의 가동자에 피스톤을 직접 연결하여 모터의 직선운동으로 피스톤을 왕복운동시키는 방식이다.Recipro method combines the crankshaft with the rotary motor and piston with the crankshaft to convert the rotational force of the rotary motor into linear reciprocating motion, whereas the linear method is applied to the actuator of the linear motor. Directly connecting the piston to reciprocate the piston by the linear motion of the motor.

본 발명은 리니어(Linear) 방식을 적용한 왕복동식 압축기에 관한 것이다.The present invention relates to a reciprocating compressor applying a linear system.

이러한 리니어(Linear) 방식의 왕복동식 압축기는 전술한 바와 같이 회전 운동을 직선 운동으로 변환하는 크랭크 샤프트(Crankshaft)가 없어 마찰 손실이 적으므로, 압축 효율면에서 일반 압축기 보다 압축 효율이 높다.As described above, the linear reciprocating compressor does not have a crankshaft for converting rotational motion into linear motion and thus has low frictional loss, and thus, the compression efficiency is higher than that of a general compressor.

상기 왕복동식 압축기가 냉장고나 에어컨에 사용될 경우에, 상기 왕복동식 압축기에 입력되는 전압(Voltage)을 가변 시킴에 따라 상기 왕복동식 압축기의 압축 비(compression ratio)를 가변 할 수 있어 냉력(Freezing Capacity)을 제어할 수 있다.When the reciprocating compressor is used in a refrigerator or an air conditioner, the compression ratio of the reciprocating compressor may be varied by varying a voltage input to the reciprocating compressor, thereby freezing capacity. Can be controlled.

도1은 종래 왕복동식 압축기를 채용한 냉장고의 압축기 구동장치에 대한 실시예의 구성을 보인 블록도이다.1 is a block diagram showing an embodiment of a compressor driving apparatus of a refrigerator employing a conventional reciprocating compressor.

도1에 도시된 바와같이, 냉장고내의 온도를 검출하여, 그 검출온도에 따라 압축기의 동작전원을 공급하도록 제어하는 냉장고 제어부(1)와; 상기 냉장고 제어 부(1)의 제어신호에 의해, 턴온되어 압축기로 동작전원을 공급하는 냉장고측 메인 릴레이(MR1)와; 압축기의 용량을 가변하기 위한 제어신호를 출력하는 압축기 제어부 (2)와; 상기 압축기 제어부(2)의 제어신호에 의해, 상기 냉장고측 메인 릴레이(MR)를 통해 입력되는 동작전원을 차단 또는 통과시키는 압축기측 메인 릴레이(MR2)와; 상기 압축기 제어부(2)의 제어신호에 의해, 압축기의 용량을 가변하기 위하여 각기 온/오프 제어되는 제1,제2 용량 가변 릴레이(VR1),(VR2)를 구비한다.As shown in Fig. 1, the refrigerator control unit 1 detects the temperature in the refrigerator and controls to supply the operating power of the compressor according to the detected temperature; A refrigerator main main relay MR1 which is turned on by a control signal of the refrigerator control unit 1 and supplies an operating power to a compressor; A compressor controller (2) for outputting a control signal for varying the capacity of the compressor; A compressor-side main relay (MR2) for blocking or passing the operating power input through the refrigerator-side main relay (MR) by a control signal of the compressor controller (2); In accordance with the control signal of the compressor control unit 2, in order to vary the capacity of the compressor, the first and second capacity variable relays VR1 and VR2 which are controlled on and off, respectively.

상기 냉장고 제어부(1)는 냉장고내의 온도를 검출하여, 그 검출된 온도가 사용자에 의해 설정된 온도보다 높으면, 냉장고내로 냉기를 공급하기 위하여, 압축기로 전원을 공급하도록 제어하고, 상기 검출온도가 설정된 온도보다 낮으면, 냉장고내로 공급되는 냉기를 차단하기 위하여, 압축기로 공급되는 동작전원을 차단하도록 제어한다.The refrigerator control unit 1 detects the temperature in the refrigerator, and if the detected temperature is higher than the temperature set by the user, controls the refrigerator to supply power to the compressor to supply cold air into the refrigerator, and the detected temperature is set to the temperature. If it is lower, in order to block the cold air supplied into the refrigerator, it is controlled to cut off the operating power supplied to the compressor.

즉, 냉장고내의 온도가 설정온도보다 낮으면, 상기 냉장고 제어부(1)의 제어신호에 의해, 냉장고측 메인 릴레이(MR1)는 오프되어, 압축기로 공급되는 전원을 차단한다.That is, when the temperature in the refrigerator is lower than the set temperature, the refrigerator-side main relay MR1 is turned off by the control signal of the refrigerator control unit 1 to cut off the power supplied to the compressor.

반대로, 냉장고의 온도가 설정온도보다 높으면, 상기 냉장고 제어부(1) 및 압축기 제어부(1)의 제어신호에 의해, 냉장고측 메인릴레이(MR1)와 압축기측 메인 릴레이(MR2)가 온되어 압축기로 동작전원이 공급되고, 이때 외부 전압의 변동값에 따라, 제1,제2 용량 가변 릴레이(VR1,VR2)가 교번으로 턴온되어 압축기의 용량을 가변한다.On the contrary, when the temperature of the refrigerator is higher than the set temperature, the refrigerator main main relay MR1 and the compressor main main relay MR2 are turned on by the control signals of the refrigerator control unit 1 and the compressor control unit 1 to operate as a compressor. Power is supplied, and at this time, the first and second variable-capacity relays VR1 and VR2 are alternately turned on to vary the capacity of the compressor according to the variation of the external voltage.

여기서, 상기 압축기의 용량을 가변하기 위하여, 압축기 제어부(2)는 압축기 측 메인 릴레이(MR2)를 오프시켜, 상기 냉장고측에서 입력되는 전원을 차단한 다음, 상기 제1,제2 용량 가변 릴레이(VR1,VR2)의 온/오프를 제어하여 압축기 용량을 가변한다.Here, in order to vary the capacity of the compressor, the compressor control unit 2 turns off the compressor side main relay MR2, cuts off the power input from the refrigerator side, and then the first and second variable capacity relays ( The compressor capacity is varied by controlling the on / off of VR1 and VR2.

이때, 도1과 같이 전압 제어없이 직접 전원에 연결하여 운전하는 경우에, 외부전원이 직투입 되어도 과도한 스트로크가 발생하지 않도록 하기 위하여, PTC를 이용하여 모터 외부 임피던스를 조정하는데, 즉 외부전원이 설정된 전압보다 높게 공급되는 경우에, 내부 회로를 보호하기 위하여, 상기 PTC는 오프되어 압축기의 동작을 정지시킨다.At this time, in the case of operating by connecting directly to the power supply without voltage control as shown in FIG. 1, in order to prevent excessive stroke even if the external power is directly input, the motor external impedance is adjusted using PTC, that is, the external power is set. When supplied higher than the voltage, in order to protect the internal circuit, the PTC is turned off to stop the operation of the compressor.

그러나, 전원 사정 및 지역에 따라 전압이 과도하게 높은 값으로 장기간 발생하는 경우에는 냉장고가 동작되지 않아 냉장고에 보관된 음식물이 손상되는 문제점이 있다. However, when the voltage is excessively generated for a long time according to the power supply situation and region, there is a problem that the food stored in the refrigerator is damaged because the refrigerator is not operated.

본 발명은 상기와 같은 문제점을 해결하기 위하여 안출된 것으로, 과전압이 인가되어도 리액터를 이용하여 임피던스를 증가시킴으로써, 스트로크를 감소시켜 압축기를 구동하여 냉력을 발생시키도록 한 왕복동식 압축기를 채용한 냉장고의 압축기 구동장치 및 방법을 제공함에 그 목적이 있다.SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and the refrigerator employs a reciprocating compressor to generate a cooling force by driving the compressor by reducing the stroke by increasing the impedance by using a reactor even when overvoltage is applied. Its purpose is to provide a compressor drive and method.

상기와 같은 목적을 달성하기 위한 본 발명은, 냉장고내의 온도를 검출하여, 그 검출온도가 일정온도 이하이면 압축기를 구동시키기 위한 제어신호를 출력하는 냉장고 제어부와; 상기 냉장고 제어부의 제어신호에 의해 온/오프되어, 압축기측으 로 전원을 공급하는 메인 릴레이와; 정상운전시, 스위칭제어신호에 의해 구동커패시터에 연결되어, 압축기를 정상적으로 운전시키고, 과전압 발생시, 스위칭제어신호에 의해 리액터측으로 연결되어, 스트로크를 감소시키는 스위치와; 전원전압을 기준전압과 비교하고, 그 비교결과에 근거하여 상기 스위치를 제어하기 위한 스위칭제어신호를 출력하는 압축기 제어부를 포함하는 것을 특징으로 한다.The present invention for achieving the above object is a refrigerator control unit for detecting a temperature in the refrigerator, and outputs a control signal for driving the compressor when the detected temperature is below a predetermined temperature; A main relay turned on / off by a control signal of the refrigerator control unit and supplying power to a compressor side; A switch connected to the drive capacitor by a switching control signal during normal operation to operate the compressor normally, and connected to the reactor side by a switching control signal when an overvoltage occurs to reduce the stroke; And a compressor controller for comparing the power supply voltage with a reference voltage and outputting a switching control signal for controlling the switch based on the comparison result.

상기와 같은 목적을 달성하기 위한 본 발명은, 냉장고가 기동되면, 냉장고에 공급되는 전원전압을 검출하여 그 전원전압을 기준전압과 비교하는 과정과; 상기 비교결과, 전원전압이 기준전압보다 작으면, 냉장고내의 온도에 따라, 커패시터를 통해 정상적으로 압축기를 구동시키고, 상기 전원전압이 기준전압보다 크면, 냉장고내 온도에 따라,리액터를 통해 임피턴스를 증가시켜 스트로크를 감소시키도록 압축기를 구동하는 과정으로 수행함을 특징으로 한다.The present invention for achieving the above object is, when the refrigerator is started, the process of detecting the power supply voltage supplied to the refrigerator and comparing the power supply voltage with a reference voltage; As a result of the comparison, if the power supply voltage is less than the reference voltage, the compressor is normally driven through the capacitor according to the temperature in the refrigerator, and if the power supply voltage is greater than the reference voltage, the impedance is increased through the reactor according to the temperature in the refrigerator. To drive the compressor to reduce the stroke.

이하, 본 발명에 의한 왕복동식 압축기를 채용한 냉장고의 압축기 구동장치 및 방법에 대한 작용과 효과를 첨부한 도면을 참조하여 상세히 설명한다.Hereinafter, the operation and effects of the compressor driving apparatus and method of the refrigerator employing the reciprocating compressor according to the present invention will be described in detail with reference to the accompanying drawings.

도2는 본 발명 왕복동식 압축기를 채용한 냉장고의 압축기 구동장치에 대한 구성을 보인 블록도이다.2 is a block diagram showing a configuration of a compressor driving apparatus of a refrigerator employing the reciprocating compressor of the present invention.

도2에 도시한 바와같이, 본 발명은 냉장고내의 온도를 검출하여, 그 검출온도가 일정온도 이하이면 압축기를 구동시키기 위한 제어신호를 출력하는 냉장고 제어부와; 상기 냉장고 제어부의 제어신호에 의해 온/오프되어, 압축기측으로 전원을 공급하는 메인 릴레이와; 정상운전시, 스위칭제어신호에 의해 구동커패시터에 연결되어, 압축기를 정상적으로 운전시키고, 과전압 발생시, 스위칭제어신호에 의해 리 액터측으로 연결되어, 스트로크를 감소시키는 스위치와; 전원전압을 기준전압과 비교하고, 그 비교결과에 근거하여 상기 스위치를 제어하기 위한 스위칭제어신호를 출력하는 압축기 제어부를 구비하며, 이와같은 본 발명의 동작을 설명한다.As shown in Fig. 2, the present invention provides a refrigerator control unit which detects a temperature in a refrigerator and outputs a control signal for driving a compressor when the detected temperature is below a predetermined temperature; A main relay turned on / off by a control signal of the refrigerator control unit and supplying power to a compressor side; A switch connected to the drive capacitor by a switching control signal in normal operation to operate the compressor normally and connected to the reactor side by a switching control signal in the event of an overvoltage, thereby reducing stroke; A compressor control unit for comparing a power supply voltage with a reference voltage and outputting a switching control signal for controlling the switch based on the comparison result is described. The operation of the present invention will be described.

먼저, 상기 냉장고 제어부(10)는 냉장고내의 온도를 검출하여, 그 검출된 온도가 사용자에 의해 설정된 온도보다 높으면, 냉장고내로 냉기를 공급하기 위하여, 압축기로 동작전원을 공급하도록 제어하고, 상기 검출온도가 설정된 온도보다 낮으면, 냉장고내로 공급되는 냉기를 차단하기 위하여, 압축기로 공급되는 동작전원을 차단하도록 제어한다.First, the refrigerator controller 10 detects a temperature in the refrigerator, and if the detected temperature is higher than a temperature set by the user, controls the refrigerator to supply operating power to the compressor to supply cold air into the refrigerator, and detects the detected temperature. When is lower than the set temperature, in order to block the cold air supplied into the refrigerator, the control to cut the operating power supplied to the compressor.

즉, 상기 냉장고 제어부(10)는 냉장고내의 온도가 설정온도보다 낮으면, 구동부(30)를 통해 상기 냉장고측 메인 릴레이(MR1)를 오프시키도록 제어하여 압축기로 공급되는 전원을 차단시키고, 이로 인해 압축기의 동작이 정지되어 냉장고내로의 냉기공급이 중단된다.That is, when the temperature in the refrigerator is lower than the set temperature, the refrigerator controller 10 controls to turn off the refrigerator-side main relay MR1 through the driver 30 to cut off the power supplied to the compressor. The operation of the compressor is stopped to stop the supply of cold air into the refrigerator.

반대로, 상기 냉장고 제어부(10)는 냉장고내의 온도가 설정온도보다 높으면,구동부(30)를 통해 상기 냉장고측 메인 릴레이(MR)를 온시키도록 제어하여 압축기로 전원을 공급한다.On the contrary, if the temperature in the refrigerator is higher than the set temperature, the refrigerator controller 10 controls the refrigerator to turn on the refrigerator side main relay MR through the driver 30 to supply power to the compressor.

이때, 압축기 제어부(20)는, 외부 전압의 변동이 일정값 이상이 되면, 제1,제2 용량 가변 릴레이(VR1),(VR2)중 어느 하나를 선택하여 압축기의 용량을 가변한다.At this time, the compressor controller 20 selects any one of the first and second variable-capacity relays VR1 and VR2 to vary the capacity of the compressor when the change in the external voltage becomes a predetermined value or more.

여기서, 상기 압축기의 용량을 가변하기 위하여, 압축기 제어부(20)는 압축기측 메인 릴레이(MR2)를 오프시켜, 상기 냉장고측에서 입력되는 전원을 차단한 다 음, 상기 제1,제2 용량 가변 릴레이(VR1,VR2)의 온/오프를 제어하여 압축기 용량을 가변한다.In this case, in order to vary the capacity of the compressor, the compressor control unit 20 turns off the compressor side main relay MR2 to cut off the power input from the refrigerator side, and then the first and second capacity variable relays. The compressor capacity is varied by controlling the on / off of (VR1, VR2).

이렇게 압축기를 구동시키면서, 상기 압축기 제어부(20)는, 소정 주기 간격으로 전원전압을 검출하여 그 전원전압을 기준전압과 비교하고, 그 비교결과 전원전압이 기준전압보다 크면 과전압으로 판단하고, 전원전압이 기준전압보다 작으면 정상전압으로 판단한다.While driving the compressor in this way, the compressor control unit 20 detects the power supply voltage at predetermined intervals and compares the power supply voltage with a reference voltage. If the power supply voltage is greater than the reference voltage, the compressor control unit 20 determines that the power supply voltage is overvoltage. If it is less than this reference voltage, it is judged as a normal voltage.

여기서, 상기 정상전압의 범위는 ±15%정도의 값으로 설정되므로, 기준전압은 정상전압보다 15%정도 큰 값으로 설정한다.Here, since the range of the normal voltage is set to a value of about 15%, the reference voltage is set to a value about 15% greater than the normal voltage.

상기 압축기 제어부(20)는, 현재 전원전압이 정상전압으로 판단되면, 스위치 (SW)를 구동커패시터(C)와 연결시켜 정상적으로 압축기를 구동시키고, 현재 전원전압이 과전압으로 판단되면, 스위치(SW)를 리액터와 연결시켜 스트로크를 감소시킴으로써, 압축기를 안정하게 구동시킨다.When it is determined that the current power supply voltage is a normal voltage, the compressor controller 20 connects the switch SW to the driving capacitor C to normally drive the compressor. When the current power supply voltage is determined to be an overvoltage, the switch SW The compressor is stably driven by reducing the stroke by connecting the reactor to the reactor.

보다 상세하게, 도3을 참조하여 본 발명을 설명하면, 우선 냉장고내 온도를 검출하고(SP1), 그 검출온도가 일정 온도보다 작으면 냉장고측 메인 릴레이(MR1)를 오프시켜 압축기로의 전원공급을 중단한다(SP2,SP4).More specifically, the present invention will be described with reference to FIG. 3. First, the temperature in the refrigerator is detected (SP1), and if the detected temperature is lower than the predetermined temperature, the refrigerator-side main relay MR1 is turned off to supply power to the compressor. Stop (SP2, SP4).

만약, 상기 검출온도가 일정온도보다 높으면(SP2), 냉장고측 메인 릴레이 (MR)를 온시켜 압축기로 전원을 공급한다(SP5,SP6)If the detected temperature is higher than the predetermined temperature (SP2), the refrigerator-side main relay (MR) is turned on to supply power to the compressor (SP5, SP6).

그 다음, 압축기로 전원을 공급하여 압축기를 동작시키면서, 외부 전압의 변동이 소정값 이상 크게 발생하면, 제1,제2 용량 가변 릴레이(VR1,VR2)중 어느 하나를 선택하여 현재 압축기의 용량을 가변한다(SP7~SP9).Then, when the power is supplied to the compressor to operate the compressor and the external voltage fluctuates more than a predetermined value, one of the first and second variable capacitance relays VR1 and VR2 is selected to adjust the capacity of the current compressor. It is variable (SP7 to SP9).

이러한 상태에서, 냉장고에 공급되는 전원전압을 소정 주기 간격으로 검출하여 그 전원전압을 기준전압과 비교한다(SP9).In this state, the power supply voltage supplied to the refrigerator is detected at predetermined cycle intervals and the power supply voltage is compared with the reference voltage (SP9).

상기 비교결과, 전원전압이 기준전압보다 작으면, 구동 커패시터(C)를 통해, 상술한 방법으로 압축기를 구동시키고(SP11), 만약, 상기 전원전압이 기준전압보다 크면, 리액터를 통해 임피턴스를 증가시켜 스트로크를 감소시키도록 압축기를 구동시킨다(SP10).As a result of the comparison, if the power supply voltage is smaller than the reference voltage, the compressor is driven through the driving capacitor C in the above-described method (SP11). If the power supply voltage is higher than the reference voltage, the impedance is increased through the reactor. The compressor is driven to increase and decrease the stroke (SP10).

다시 말해서, 본 발명은 냉장고에 공급되는 전원을 소정 주기간격으로 검출하여, 그 전원전압이 일정전압 이상의 과전압이어도 리액터를 이용하여 임피던스를 증가시킴으로써, 압축기의 스트로크를 감소시켜 최소한의 냉력을 발생시키도록 한 것이다.In other words, the present invention detects the power supplied to the refrigerator at a predetermined main interval, and increases the impedance using a reactor even if the power supply voltage is over a predetermined voltage, thereby reducing the stroke of the compressor to generate the minimum cooling power. It is.

상기 본 발명의 상세한 설명에서 행해진 구체적인 실시 양태 또는 실시예는 어디까지나 본 발명의 기술 내용을 명확하게 하기 위한 것으로 이러한 구체적 실시예에 한정해서 협의로 해석해서는 안되며, 본 발명의 정신과 다음에 기재된 특허 청구의 범위내에서 여러가지 변경 실시가 가능한 것이다.The specific embodiments or examples made in the detailed description of the present invention are intended to clarify the technical contents of the present invention to the extent that they should not be construed as limited to these specific embodiments and should not be construed in consultation. Various changes can be made within the scope of.

이상에서 상세히 설명한 바와같이 본 발명은, 과전압이 인가되어도 리액터를 이용하여 임피던스를 증가시켜 스트로크를 감소시킴으로써, 최소한의 냉력을 발생하여 냉장고의 운전정지에 따른 음식물의 손실을 방지하는 효과가 있다.As described in detail above, the present invention has an effect of preventing the loss of food due to the shutdown of the refrigerator by generating a minimum cooling force by increasing the impedance to reduce the stroke even when an overvoltage is applied.

Claims (3)

냉장고내의 온도를 검출하여, 그 검출온도가 일정온도 이하이면 압축기를 구동시키기 위한 제어신호를 출력하는 냉장고 제어부와; A refrigerator control unit which detects a temperature in the refrigerator and outputs a control signal for driving the compressor when the detected temperature is below a predetermined temperature ; 상기 냉장고 제어부의 제어신호에 의해 온/오프되어, 압축기측으로 전원을 공급하는 메인 릴레이와;A main relay turned on / off by a control signal of the refrigerator control unit and supplying power to a compressor side; 정상운전시, 스위칭제어신호에 의해 구동커패시터에 연결되어, 압축기를 정상적으로 운전시키고,In normal operation, it is connected to the driving capacitor by the switching control signal to operate the compressor normally, 과전압 발생시, 스위칭제어신호에 의해 리액터측으로 연결되어, 스트로크를 감소시키는 스위치와;A switch connected to the reactor side by a switching control signal to reduce stroke when an overvoltage occurs; 전원전압을 기준전압과 비교하고, 그 비교결과에 근거하여 상기 스위치를 제어하기 위한 스위칭제어신호를 출력하는 압축기 제어부를 포함하는 것을 특징으로 하는 왕복동식 압축기를 채용한 냉장고의 압축기 구동장치.And a compressor controller for comparing a power supply voltage with a reference voltage and outputting a switching control signal for controlling the switch based on the comparison result. 제1 항에 있어서, 압축기 제어부는, The method of claim 1, wherein the compressor control unit, 전원전압이 기준전압보다 크면, 스위치를 리액터에 연결시켜, 스트로크를 감소시키도록 제어하는 것을 특징으로 하는 왕복동식 압축기를 채용한 냉장고의 압축기 구동장치.The compressor drive device of a refrigerator employing a reciprocating compressor, characterized in that if the power supply voltage is greater than the reference voltage, the switch is connected to the reactor to control the stroke to be reduced. 냉장고가 기동되면, 냉장고에 공급되는 전원전압을 검출하여 그 전원전압을 기준전압과 비교하는 과정과;Detecting a power supply voltage supplied to the refrigerator when the refrigerator is started, and comparing the power supply voltage with a reference voltage; 상기 비교결과, 전원전압이 기준전압보다 작으면, 구동 커패시터를 통해 정상적으로 압축기를 구동시키고,As a result of the comparison, when the power supply voltage is less than the reference voltage, the compressor is normally driven through the driving capacitor, 상기 전원전압이 기준전압보다 크면, 리액터를 통해 임피턴스를 증가시켜 스트로크를 감소시키도록 압축기를 구동하는 과정으로 수행함을 특징으로 하는 왕복동식 압축기를 채용한 냉장고의 압축기 구동방법.If the power supply voltage is greater than the reference voltage, the compressor driving method of the refrigerator employing a reciprocating compressor, characterized in that the step of driving the compressor to reduce the stroke by increasing the impedance through the reactor.
KR1020040011488A 2004-02-20 2004-02-20 Compressor driving apparatus and method of refrigerator with reciprocating compressor KR100595549B1 (en)

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