KR20080027703A - Driving apparatus and method for reciprocating compressor - Google Patents

Driving apparatus and method for reciprocating compressor Download PDF

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Publication number
KR20080027703A
KR20080027703A KR1020060093186A KR20060093186A KR20080027703A KR 20080027703 A KR20080027703 A KR 20080027703A KR 1020060093186 A KR1020060093186 A KR 1020060093186A KR 20060093186 A KR20060093186 A KR 20060093186A KR 20080027703 A KR20080027703 A KR 20080027703A
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South Korea
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center point
cooling force
correction value
cold power
compression unit
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KR1020060093186A
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Korean (ko)
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김정우
이형국
이철웅
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엘지전자 주식회사
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Priority to KR1020060093186A priority Critical patent/KR20080027703A/en
Publication of KR20080027703A publication Critical patent/KR20080027703A/en

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    • 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
    • F04B49/16—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 adjusting the capacity of dead spaces of working chambers
    • 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
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/0005—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00 adaptations of pistons
    • 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
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/12—Casings; Cylinders; Cylinder heads; Fluid connections
    • F04B39/122—Cylinder block
    • 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
    • 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
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2210/00—Working fluid
    • F05B2210/10—Kind or type
    • F05B2210/12—Kind or type gaseous, i.e. compressible
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2210/00—Working fluid
    • F05B2210/10—Kind or type
    • F05B2210/14—Refrigerants with particular properties, e.g. HFC-134a
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S417/00—Pumps

Abstract

An apparatus of controlling the operation of a reciprocating type compressor and a method having the same are provided to independently control the compressor depending on cooling load by allowing a center point of a piston to move depending on the cooling load which is differently required in two evaporators. An apparatus of controlling the operation of a reciprocating type compressor comprises a storage unit(100), an operation unit for a center point compensation value(200), and a control unit(300). The compressor includes a first compression unit(401), which sucks and compresses refrigerant according to a first desired cooling force, and a second compression unit(402), which sucks and discharges the compressed refrigerant according to a second desired cooling force. The storage unit stores an offset compensation value based on a difference between the first desired cooling force and the second desired cooling force. The operation unit detects the difference between the first desired cooling force and the second desired cooling force, and selects the offset compensation value based on the difference, and then outputs a center point compensation value based on the selected offset compensation value. The control unit outputs a control signal based on the center point compensation value.

Description

왕복동식 압축기의 운전제어장치 및 방법{DRIVING APPARATUS AND METHOD FOR RECIPROCATING COMPRESSOR}Operation Control System and Method of Reciprocating Compressor {DRIVING APPARATUS AND METHOD FOR RECIPROCATING COMPRESSOR}

도 1은 종래 왕복동식 압축기를 적용한 냉동시스템의 일례를 보인 계통도,1 is a system diagram showing an example of a refrigeration system to which a conventional reciprocating compressor is applied;

도 2는 본 발명 왕복동식 압축기를 적용한 냉동시스템 또는 히트펌프시스템의 일례를 보인 계통도,2 is a system diagram showing an example of a refrigeration system or a heat pump system to which the reciprocating compressor of the present invention is applied;

도 3은 본 발명 왕복동식 압축기의 운전제어장치에 대한 구성을 보인 블록도.Figure 3 is a block diagram showing the configuration of the operation control device of the reciprocating compressor of the present invention.

도 4는 도 3에 있어서, 냉력에 따라 피스톤의 중심점 이동을 보인 예시도.4 is an exemplary view showing the movement of the center point of the piston in accordance with the cooling force in FIG.

도 5는 본 발명 왕복동식 압축기의 운전제어방법에 대한 동작흐름도.5 is an operational flow chart for the operation control method of the reciprocating compressor of the present invention.

** 도면의 주요 부분에 대한 부호의 설명 **** Description of symbols for the main parts of the drawing **

100:저장유닛 200:중심점 보정치 연산유닛100: storage unit 200: center correction value calculation unit

300:제어유닛 400.401,401:압축유닛300: control unit 400.401, 401: compression unit

본 발명은 두 개의 증발기를 갖는 냉동사이클에 적용되는 왕복동식 압축기에 관한 것으로, 특히 두개의 압축유닛을 형성하여 고정된 실린더 내부를, 각각의 증 발기에서 요구하는 냉동부하에 따라 동축상에 결합된 피스톤의 중심점을 이동하여 왕복운동시킬 수 있도록 한 왕복동식 압축기의 운전제어장치 및 방법에 관한 것이다.The present invention relates to a reciprocating compressor applied to a refrigeration cycle having two evaporators, and in particular, to form two compression units, the fixed cylinder inside of which is coaxially coupled according to the freezing load required by each evaporator. The present invention relates to an operation control apparatus and method for a reciprocating compressor capable of reciprocating by moving a center point of a piston.

일반적으로, 왕복동식 압축기는 냉매를 압축하는 압축실이 하나이기 때문에 그 압축실로 흡입된 냉매가 압축되어 토출될 때까지는 1단 압축만이 가능하다. 따라서 냉동시스템의 효율을 향상시키기 위하여는 내부열교환기(또는, Suction Line Heat Exchanger)를 사용하여 냉력을 증가시키고 있다. 즉, 도 1에서와 같이 증발기(4)를 통과한 저온의 기체냉매를 이용하여 응축기(2)에서 나오는 고온의 액체냉매를 과냉시킬 수 있도록 열교환기(5)가 구비된 냉동사이클을 구성하고 있다. 이러한 냉동사이클은 압축기(1)로 흡입되는 냉매의 비체적이 다소 상승하더라도 그 압축기 입구에서의 냉매온도를 높여 최종적으로는 압축기(1)에 액냉매가 유입되는 것을 막을 수 있다. Generally, since a reciprocating compressor has only one compression chamber for compressing a refrigerant, only one stage compression is possible until the refrigerant sucked into the compression chamber is compressed and discharged. Therefore, in order to improve the efficiency of the refrigeration system, an internal heat exchanger (or a suction line heat exchanger) is used to increase the cooling power. That is, as shown in FIG. 1, a refrigeration cycle having a heat exchanger 5 is configured to supercool the high temperature liquid refrigerant from the condenser 2 using a low temperature gas refrigerant that has passed through the evaporator 4. . In such a refrigeration cycle, even if the specific volume of the refrigerant sucked into the compressor 1 rises slightly, the refrigerant temperature at the compressor inlet can be increased to finally prevent the liquid refrigerant from flowing into the compressor 1.

이는 상기 압축기(1)의 실린더로 액체냉매가 유입되는 경우 그 액체냉매가 실린더를 윤활하는 오일을 씻어내려 피스톤과의 마모를 촉진시킬 수 있을 뿐만 아니라 과압축으로 인해 밸브의 손상을 야기할 수 있으므로 가급적 액냉매가 실린더로 유입되는 것을 미연에 차단하는 것이 흡입되는 냉매의 비체적이 상승하여 발생되는 흡입손실 보다는 압축기의 신뢰성 측면에서는 더 유리하기 때문이다. When the liquid refrigerant flows into the cylinder of the compressor (1), the liquid refrigerant may wash away the oil lubricating the cylinder to promote wear with the piston and cause damage to the valve due to overcompression. This is because blocking the liquid refrigerant from entering the cylinder in advance is more advantageous in terms of the reliability of the compressor than the suction loss caused by the increase in the specific volume of the refrigerant to be sucked.

또 다른 이유로는, 팽창밸브(3) 입구단에서 과냉도를 증가시켜서 팽창밸브 통과 후 증발기(4) 입구의 엔탈피를 낮추므로 증발기의 냉동능력이 향상되고, 이에 따라 냉동시스템의 능력을 향상시킬 수 있기 때문이다.Another reason is that by increasing the supercooling at the inlet end of the expansion valve (3) to lower the enthalpy of the inlet of the evaporator (4) after passing through the expansion valve, the freezing capacity of the evaporator can be improved, thereby improving the capacity of the refrigeration system. Because there is.

그러나, 상기와 같은 종래 냉동사이클은, 서로 다른 2개의 증발기를 동시에 구성할 수 없기 때문에 냉장실과 냉동실의 증발온도가 다를 때 효율이 높아지는 냉장고와 같은 시스템에 1단 압축 사이클만 적용하면 냉동시스템의 효율이 높지 않게 되는 문제점도 있었다.However, the conventional refrigeration cycle as described above, because it is not possible to configure two different evaporators at the same time efficiency of the refrigeration system if only one stage compression cycle is applied to a system, such as a refrigerator, where the efficiency is increased when the evaporation temperature of the refrigerating compartment and the freezer compartment is different There was also a problem that is not high.

이에 따라, 2개의 증발기를 갖는 냉동사이클이 개발되었고, 그 냉동사이클에 효과적으로 대응하기 위하여 2개의 압축유닛을 구비하는 왕복동식 압축기가 개발되었다.Accordingly, a refrigeration cycle having two evaporators has been developed, and a reciprocating compressor having two compression units has been developed to effectively cope with the refrigeration cycle.

여기서, 상기 2개의 압축유닛은 동축상에 위치하는 실린더 내부를 하나의 피스톤을 왕복 운동함으로써 2단 압축 사이클을 적용할 수 있다.Here, the two compression units may apply a two-stage compression cycle by reciprocating one piston in a cylinder located coaxially.

그러나, 종래 2개의 압축유닛을 구비한 왕복동식 압축기는, 피스톤의 중심점이 일정함에 따라, 2개의 증발기는, 각각의 증발기에서 요구되는 냉력에 독립적으로 대응하지 못하는 문제점이 있다.However, conventional reciprocating compressors having two compression units have a problem that, as the center point of the piston is constant, the two evaporators do not independently respond to the cooling force required in each evaporator.

예를 들어, 냉동실과 냉장실의 경우에, 냉장실에서 요구되는 냉력과 냉동실에서 요구하는 냉력이 서로 다름에도 불구하고, 항상 동일한 냉력을 발생해야만 하는 문제점이 있다. For example, in the case of the freezing compartment and the refrigerating compartment, there is a problem that the same cooling force must always be generated even though the cooling force required in the refrigerating compartment and the cooling force required in the freezing compartment are different.

상기와 같은 문제점을 감안하여 창안한 본 발명은,두 개의 압축유닛을 형성하여 고정된 실린더 내부를, 각각의 증발기에서 요구하는 냉동부하에 따라 동축상에 결합된 피스톤의 중심점을 이동하여 왕복운동시킴으로써, 각각의 냉동부하에 독립적으로 대응할 수 있도록 한 왕복동식 압축기의 운전제어장치 및 방법을 제공함 에 그 목적이 있다.The present invention has been made in view of the above problems, by forming two compression units by reciprocating by moving the center point of the coaxially coupled piston according to the freezing load required by each evaporator fixed cylinder inside It is an object of the present invention to provide an operation control apparatus and method for a reciprocating compressor capable of independently responding to each refrigeration load.

상기와 같은 목적을 달성하기 위하여 본 발명은,The present invention to achieve the above object,

제1 냉력요구치에 따라, 냉매를 흡입하여 압축하는 제1 압축유닛과 제2 냉력요구치에 따라, 상기 압축된 냉매를 압축하여 토출하는 제2 압축유닛을 구비하는 왕복동식 압축기의 운전제어장치 있어서,In the operation control apparatus of the reciprocating compressor comprising a first compression unit for sucking and compressing the refrigerant in accordance with the first cooling force requirement and a second compression unit for compressing and discharging the compressed refrigerant in accordance with the second cooling force requirement,

상기 제1 냉력요구치와 상기 제2 냉력요구치의 차이에 따른 오프셋 보정치를 저장하는 저장유닛과;A storage unit for storing an offset correction value according to a difference between the first cold power demand value and the second cold power demand value;

상기 제1 냉력요구치와 상기 제2 냉력요구치의 차이를 검출하여 그 차이에 따른 오프셋 보정치를 상기 저장유닛에서 선택하고, 그 선택된 오프셋 보정치를 중심점 보정치로 출력하는 중심점 보정치 연산유닛과;A center point correction value calculating unit which detects a difference between the first cold power demand value and the second cold power demand value, selects an offset correction value according to the difference from the storage unit, and outputs the selected offset correction value as a center point correction value;

상기 중심점 보정치에 따라, 피스톤의 중심점을 제1 압축유닛 또는 제2 압축유닛으로 이동시키기 위한 제어신호를 출력하는 제어유닛을 포함하여 구성한 것을 특징으로 한다.According to the center point correction value, it characterized in that it comprises a control unit for outputting a control signal for moving the center point of the piston to the first compression unit or the second compression unit.

상기와 같은 목적을 달성하기 위하여 본 발명은, 제1 냉력요구치에 따라, 냉매를 흡입하여 압축하는 제1 압축유닛과 제2 냉력요구치에 따라, 상기 압축된 냉매를 압축하여 토출하는 제2 압축유닛을 구비하는 왕복동식 압축기의 운전제어방법에 있어서,In order to achieve the above object, the present invention provides a first compression unit for sucking and compressing a refrigerant according to a first cold power requirement and a second compression unit for compressing and discharging the compressed refrigerant according to a second cold power requirement. In the operation control method of a reciprocating compressor comprising:

상기 제1 냉력요구치와 상기 제2 냉력요구치를 감지하는 과정과;Sensing the first cold power demand value and the second cold power demand value;

상기 제1 냉력요구치와 제2 냉력요구치의 크기를 비교하고, 그 비교결과에 근거하여 피스톤의 중심점을 이동하는 과정을 수행함을 특징으로 한다.Comparing the size of the first cooling force request value and the second cooling force request value, based on the comparison result is characterized in that for performing the process of moving the center point of the piston.

이하, 본 발명에 의한 왕복동식 압축기의 운전제어장치 및 방법을 첨부한 도면을 참조하여 상세하게 설명한다.Hereinafter, an operation control apparatus and method for a reciprocating compressor according to the present invention will be described in detail with reference to the accompanying drawings.

도 2는 본 발명 왕복동식 압축기의 운전제어장치 및 방법이 적용되는 왕복동식 압축기의 구성을 보인 개략도이다.2 is a schematic view showing the configuration of a reciprocating compressor to which the operation control apparatus and method of the present invention reciprocating compressor are applied.

도 3은 본 발명 왕복동식 압축기의 운전제어장치에 대한 구성을 보인 블록도이다.Figure 3 is a block diagram showing the configuration of the operation control device of the reciprocating compressor of the present invention.

도 3에 도시한 바와 같이 본 발명은, 저장유닛(100), 중심점 보정치 연산유닛(200),제어유닛(300), 제1,제2 압축유닛(401),(402)으로 이루어진 압축유닛(40))을 포함하여 구성한다.As shown in FIG. 3, the present invention provides a compression unit including a storage unit 100, a center point correction value calculating unit 200, a control unit 300, first and second compression units 401, and 402. 40)).

상기 저장유닛(100)은 실험에 의해, 상기 제1 냉력요구치와 상기 제2 냉력요구치의 차이에 따른 오프셋 보정치를 기저장한다.The storage unit 100 stores an offset correction value according to a difference between the first cold power requirement and the second cold power requirement by experiment.

여기서, 상기 제1 냉력요구치와 제2 냉력요구치는, 냉동실과 냉장실에서 요구하는 냉력일 수 있다.Here, the first cold power request value and the second cold power request value may be the cold power required by the freezer compartment and the refrigerating compartment.

상기 중심점 보정치 연산유닛(200)은 상기 제1 냉력요구치와 상기 제2 냉력요구치의 차이를 검출하여 그 차이에 따른 오프셋 보정치를 상기 저장유닛(100)에서 선택하고, 그 선택된 오프셋 보정치를 중심점 보정치로 출력한다.The center point correction value calculating unit 200 detects a difference between the first cold power requirement value and the second cold power requirement value, selects an offset correction value according to the difference from the storage unit 100, and selects the selected offset correction value as a center point correction value. Output

상기 제어유닛(300)은 상기 중심점 보정치에 따라, 피스톤의 중심점을 제1 압축유닛(401) 또는 제2 압축유닛(402)으로 이동시키기 위한 제어신호를 출력한다.The control unit 300 outputs a control signal for moving the center point of the piston to the first compression unit 401 or the second compression unit 402 according to the center point correction value.

이와 같은 본 발명의 동작을 설명한다.Such operation of the present invention will be described.

먼저, 저장유닛(100)에, 실험에 따라 검출되는 상기 제1 냉력요구치와 상기 제2 냉력요구치의 차이에 따른 오프셋 보정치들을 기저장한다.First, in the storage unit 100, offset correction values according to a difference between the first cold power requirement value and the second cold power requirement value detected according to an experiment are prestored.

이러한 상태에서, 상기 중심점 보정치 연산유닛(200)은 제1 냉력요구치와 제2 냉력요구치를 감지한다.In this state, the center point correction value calculating unit 200 detects the first cooling force requirement value and the second cooling force requirement value.

즉, 상기 중심점 보정치 연산유닛(200)은 냉동실 및 냉장실에서 요구하는 냉력을 감지한다.That is, the center point correction value calculating unit 200 detects the cooling force required by the freezer compartment and the refrigerating compartment.

상기 중심점 보정치 연산유닛(200)은 상기 제1 냉력요구치와 상기 제2 냉력요구치의 차이값을 계산하고, 그 계산된 차이값으로 상기 저장유닛(100)에 기저장된 오프셋 보정치를 선택하여 그 선택된 오프셋 보정치를 중심점 보정치로 제어유닛(300)에 출력한다.The center point correction value calculating unit 200 calculates a difference value between the first cooling force requirement value and the second cooling force requirement value, selects an offset correction value previously stored in the storage unit 100 as the calculated difference value, and selects the selected offset value. The correction value is output to the control unit 300 as the center point correction value.

이에 따라, 상기 제어유닛(300)은 상기 중심점 보정치에 따라, 피스톤의 중심을 이동시키기 위한 제어신호를 출력한다.Accordingly, the control unit 300 outputs a control signal for moving the center of the piston according to the center point correction value.

여기서,상기 제어신호는 도 4의 (b)와 같이, 상기 중심점 보정치에 대응하는, 비대칭적인 파형을 가진 정현파신호이다.Here, the control signal is a sine wave signal having an asymmetric waveform corresponding to the center point correction value, as shown in FIG.

즉, 상기 제어신호는 정현파신호에, 중심점 보정치에 따른 직류전압이 가산된다.That is, the control signal is added to the sine wave signal, the DC voltage according to the center point correction value.

예를 들어, 상기 제어유닛(300)은 제1 압축유닛(401)에 대한 제1 냉력요구치가 상기 제2 압축유닛(402)에 대한 제2 냉력 요구치보다 크면 피스톤(스트로크)의 중심점을, 도4의 (a)에서 도 4의 (b)로 이동시킨다.For example, the control unit 300 shows the center point of the piston (stroke) when the first cooling force requirement for the first compression unit 401 is greater than the second cooling force requirement for the second compression unit 402. It moves from 4 (a) to FIG. 4 (b).

반대로, 상기 제어유닛(300)은 제1 압축 유닛(401)에 대한 제1 냉력요구치가 제2 압축유닛(402)에 대한 제2 냉력요구치 보다 작으면 피스톤(스트로크)의 중심점을 제2 압축유닛(402)측으로 이동시킨다.On the contrary, if the first cooling force requirement for the first compression unit 401 is smaller than the second cooling force requirement for the second compression unit 402, the control unit 300 sets the center point of the piston (stroke) to the second compression unit. Move to the (402) side.

보다 상세하게, 도 5를 참조하여 설명하면, 중심점 보정치 연산유닛(200)은 냉동실(제1 압축유닛)과 냉장실(제2 압축유닛)에서 각기 요구되는 제1 냉력요구치,제2 냉력요구치를 감지하고(SP10), 그 제1 냉력요구치와 제2 냉력 요구치의 크기를 비교한다(SP11).In more detail, referring to FIG. 5, the center point correction value calculating unit 200 detects the first cooling force requirements and the second cooling force requirements respectively required in the freezing compartment (first compression unit) and the refrigerating compartment (second compression unit). (SP10), and compares the magnitude of the first cold power requirement value with the second cold power requirement value (SP11).

상기 비교결과(SP11), 상기 중심점 보정치 연산유닛(200)은 제1 냉력 요구치가 제1 압축 유닛(401)에 대한 제1 냉력요구치가 제2 압축유닛(402)에 대한 제2 냉력요구치 보다 크면 피스톤(스트로크)의 중심점을 제1 압축유닛(401)측으로 이동시키기 위한 중심점 보정치를 제어유닛에 인가하고, 이에 따라 상기 제어유닛은 상기 중심점 보정치에 따라, 상기 피스톤(스트로크)의 중심점을 상기 제1 압축유닛(401)측으로 이동시킨다(SP12).When the comparison result SP11, the center point correction value calculating unit 200 has a first cooling force request value greater than the first cooling force requirement for the first compression unit 401 is greater than the second cooling force requirement for the second compression unit 402. A center point correction value for moving the center point of the piston (stroke) to the first compression unit 401 side is applied to the control unit, and accordingly, the control unit sets the center point of the piston (stroke) according to the center point correction value to the first unit. It moves to the compression unit 401 side (SP12).

상기 비교결과((SP11), 상기 중심점 보정치 연산유닛(200)은 제1 냉력 요구치가 제1 압축 유닛(401)에 대한 제1 냉력요구치가 제2 압축유닛(402)에 대한 제2 냉력요구치 보다 작으면 피스톤(스트로크)의 중심점을 제2 압축유닛(402)측으로 이동시키기 위한 중심점 보정치를 제어유닛(300)에 인가하고, 이에 따라 상기 제어유닛(300)은 상기 중심점 보정치에 따라, 상기 피스톤(스트로크)의 중심점을 상기 제2 압축유닛(402)측으로 이동시킨다(SP13).As a result of the comparison (SP11), the center point correction value calculating unit 200 has a first cooling force request value that is greater than the first cooling force requirement value for the first compression unit 401 than the second cooling force requirement value for the second compression unit 402. If it is small, the center point correction value for moving the center point of the piston (stroke) to the second compression unit 402 side is applied to the control unit 300. Accordingly, the control unit 300 according to the center point correction value, the piston ( The center point of the stroke is moved toward the second compression unit 402 (SP13).

상기 본 발명의 상세한 설명에서 행해진 구체적인 실시 양태 또는 실시 예는 어디까지나 본 발명의 기술 내용을 명확하게 하기 위한 것으로 이러한 구체적 실시 예에 한정해서 협의로 해석해서는 안되며, 본 발명의 정신과 다음에 기재된 특허 청구의 범위 내에서 여러 가지 변경 실시가 가능한 것이다.Specific embodiments or embodiments made in the detailed description of the present invention are intended to clarify the technical contents of the present invention to the last, and should not be construed as limited to these specific embodiments by consultation, the spirit of the present invention and the claims Various changes can be made within the scope of.

이상에서 상세히 설명한 바와 같이 본 발명은, 두 개의 압축유닛을 형성하여 고정된 실린더 내부를, 각각의 증발기에서 요구하는 냉동부하에 따라 동축상에 결합된 피스톤의 중심점을 이동하여 왕복운동시킴으로써, 각각의 냉동부하에 독립적으로 대응하여 운전효율을 향상시키는 효과가 있다.As described in detail above, the present invention, by forming two compression units by moving the center point of the piston coupled to the coaxial reciprocating motion according to the freezing load required by each evaporator, Independently corresponding to the refrigeration load has the effect of improving the operating efficiency.

Claims (6)

제1 냉력요구치에 따라, 냉매를 흡입하여 압축하는 제1 압축유닛과 제2 냉력요구치에 따라, 상기 압축된 냉매를 압축하여 토출하는 제2 압축유닛을 구비하는 왕복동식 압축기의 운전제어장치 있어서,In the operation control apparatus of the reciprocating compressor comprising a first compression unit for sucking and compressing the refrigerant in accordance with the first cooling force requirement and a second compression unit for compressing and discharging the compressed refrigerant in accordance with the second cooling force requirement, 상기 제1 냉력요구치와 상기 제2 냉력요구치의 차이에 따른 오프셋 보정치를 저장하는 저장유닛과;A storage unit for storing an offset correction value according to a difference between the first cold power demand value and the second cold power demand value; 상기 제1 냉력요구치와 상기 제2 냉력요구치의 차이를 검출하여 그 차이에 따른 오프셋 보정치를 상기 저장유닛에서 선택하고, 그 선택된 오프셋 보정치를 중심점 보정치로 출력하는 중심점 보정치 연산유닛과;A center point correction value calculating unit which detects a difference between the first cold power demand value and the second cold power demand value, selects an offset correction value according to the difference from the storage unit, and outputs the selected offset correction value as a center point correction value; 상기 중심점 보정치에 따라, 피스톤의 중심점을 제1 압축유닛 또는 제2 압축유닛으로 이동시키기 위한 제어신호를 출력하는 제어유닛을 포함하는 왕복동식 압축기의 운전제어장치.And a control unit for outputting a control signal for moving the center point of the piston to the first compression unit or the second compression unit, in accordance with the center point correction value. 제1 항에 있어서, 상기 제어신호는,The method of claim 1, wherein the control signal, 상기 중심점 보정치에 대응하는, 비대칭적인 파형의 정현파인 왕복동식 압축기의 운전제어장치.And a symmetrical sine wave of an asymmetric waveform corresponding to the center point correction value. 제1 항에 있어서, 상기 제어신호는,The method of claim 1, wherein the control signal, 정현파에, 중심점 보정치에 따른 직류전압이 가산되는 왕복동식 압축기의 운 전제어장치.Operation control device for a reciprocating compressor in which a DC voltage is added to a sine wave according to a center point correction value. 제1 냉력요구치에 따라, 냉매를 흡입하여 압축하는 제1 압축유닛과 제2 냉력요구치에 따라, 상기 압축된 냉매를 압축하여 토출하는 제2 압축유닛을 구비하는 왕복동식 압축기의 운전제어방법에 있어서,In the operation control method of the reciprocating compressor comprising a first compression unit for sucking and compressing the refrigerant in accordance with the first cooling force requirement and a second compression unit for compressing and discharging the compressed refrigerant in accordance with the second cooling force requirement. , 상기 제1 냉력요구치와 상기 제2 냉력요구치를 감지하는 과정과;Sensing the first cold power demand value and the second cold power demand value; 상기 제1 냉력요구치와 제2 냉력요구치의 크기를 비교하고, 그 비교결과에 근거하여 피스톤의 중심점을 이동하는 과정을 수행하는 왕복동식 압축기의 운전제어방법.And comparing the magnitudes of the first cold power demand value and the second cold power demand value, and moving a center point of the piston based on the comparison result. 제4 항에 있어서, The method of claim 4, wherein 상기 제1 냉력요구치와 상기 제2 냉력요구치의 차이에 따른 오프셋 보정치를 검출하여 저장하는 과정을 더 포함하는 왕복동식 압축기의 운전제어방법.And detecting and storing an offset correction value according to a difference between the first cold power demand value and the second cold power demand value. 제4 항에 있어서, 상기 피스톤의 중심점을 이동하는 과정은,The process of claim 4, wherein the moving of the center point of the piston comprises: 상기 제1 냉력요구치가 상기 제2 냉력요구치보다 크면 피스톤의 중심점을 제1 압축 유닛측으로 이동하고,If the first cooling force requirement is greater than the second cooling force requirement, the center point of the piston is moved to the first compression unit side, 상기 제2 냉력요구치가 상기 제1 냉력요구치보다 크면 피스톤의 중심점을 제2 압축 유닛측으로 이동하는 단계를 포함하는 왕복동식 압축기의 운전제어방법.And moving the center point of the piston toward the second compression unit when the second cooling force requirement is greater than the first cooling force requirement.
KR1020060093186A 2006-09-25 2006-09-25 Driving apparatus and method for reciprocating compressor KR20080027703A (en)

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