KR20040003876A - method for controling cooling system with two evaporators - Google Patents

method for controling cooling system with two evaporators Download PDF

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Publication number
KR20040003876A
KR20040003876A KR1020020038703A KR20020038703A KR20040003876A KR 20040003876 A KR20040003876 A KR 20040003876A KR 1020020038703 A KR1020020038703 A KR 1020020038703A KR 20020038703 A KR20020038703 A KR 20020038703A KR 20040003876 A KR20040003876 A KR 20040003876A
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KR
South Korea
Prior art keywords
refrigerant
evaporator
cycle
compressor
cooling system
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KR1020020038703A
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Korean (ko)
Inventor
정의엽
김세영
김경식
이태희
김양규
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엘지전자 주식회사
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Application filed by 엘지전자 주식회사 filed Critical 엘지전자 주식회사
Priority to KR1020020038703A priority Critical patent/KR20040003876A/en
Priority to DE10260350.2A priority patent/DE10260350B4/en
Priority to JP2002379190A priority patent/JP3816872B2/en
Priority to GB0230334A priority patent/GB2390419B/en
Priority to CNA021583838A priority patent/CN1467459A/en
Publication of KR20040003876A publication Critical patent/KR20040003876A/en

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/10—Preparation of respiratory gases or vapours
    • A61M16/1075—Preparation of respiratory gases or vapours by influencing the temperature
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M2205/00—General characteristics of the apparatus
    • A61M2205/33—Controlling, regulating or measuring
    • A61M2205/3368—Temperature
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M2205/00—General characteristics of the apparatus
    • A61M2205/36—General characteristics of the apparatus related to heating or cooling
    • A61M2205/3653—General characteristics of the apparatus related to heating or cooling by Joule effect, i.e. electric resistance

Abstract

PURPOSE: An operation control method of a cooling system with two evaporators is provided to collect a refrigerant remaining in the evaporators and prevent lack of the refrigerant in the system, in changing a cooling cycle. CONSTITUTION: A cooling system has two evaporators selectively executing an F-cycle and an R-cycle. In the F-cycle, a refrigerant, passing through a compressor and a condenser, is switched by a three-way valve, and the refrigerant successively flows through a first expanding device and an F-evaporator. In the R-cycle, the refrigerant is switched by the three-way valve and the refrigerant successively flows through a second expanding device and an R-evaporator. In an operation control method of the cooling system, the refrigerant remaining in the F-evaporator is collected to the compressor and the condenser by closing the three-way valve for a predetermined time and operating the compressor, in cycle conversion from the F-cycle to the R-cycle. The refrigerant remaining in the F-evaporator is evaporated by turning an F-fan, in closing the three-way valve.

Description

2개의 증발기가 구비된 냉각시스템의 운전제어방법{method for controling cooling system with two evaporators}Method for controlling cooling system with two evaporators

본 발명은 2개의 증발기가 구비된 냉각시스템에 관한 것으로서, 더욱 상세하게는 사이클 전환시 증발기에 잔류된 냉매를 회수하여 냉각시스템의 냉매부족현상을 방지토록 한 운전제어방법에 관한 것이다.The present invention relates to a cooling system having two evaporators, and more particularly, to an operation control method for recovering the refrigerant remaining in the evaporator during cycle switching to prevent the refrigerant shortage of the cooling system.

일반적인 냉장고는 냉동실 및 냉장실에 음식물을 넣고 보관하여 음식물을 신선한 상태로 장기간 동안 보관할 수 있도록 한 장치이다.A general refrigerator is a device for storing food in a fresh state for a long time by storing food in a freezer and a refrigerating compartment.

이러한 냉장고는 하나의 증발기로 냉동실과 냉장실에 냉기를 공급하는 1개의 증발기가 구비된 냉각시스템과, 냉동실과 냉장실에 각각 증발기를 설치하여 각 실을 독립적으로 제어하는 2개의 증발기가 구비된 냉각시스템으로 구분된다.The refrigerator is a cooling system having one evaporator for supplying cold air to the freezer compartment and the refrigerating compartment with one evaporator, and a cooling system having two evaporators for controlling each compartment independently by installing evaporators in the freezer compartment and the refrigerating compartment. Are distinguished.

상기 2개의 증발기가 구비된 냉각시스템은 제어부에 의해 삼방변을 절환시킴으로써 냉매가 두 개의 증발기 중에서 하나의 증발기로 유입되도록 한다. 이때, 상기 증발기 근처에는 각각 팬이 설치되고, 상기 팬의 회전에 의해 각 실의 증발기에 유입된 냉매와 공기가 열교환되도록 한다.The cooling system provided with the two evaporators switches the three sides by the control unit so that the refrigerant flows into one of the two evaporators. At this time, each fan is installed near the evaporator, and the refrigerant and the air introduced into the evaporator of each chamber are exchanged by the rotation of the fan.

이러한 작용에 의해 상기 냉동실 또는 냉장실의 온도가 제어부에 미리 설정된 조건을 만족하면, 상기 증발기에 냉매의 공급이 중단됨과 아울러 이 증발기 근처에 설치된 팬은 회전이 정지된다.When the temperature of the freezing compartment or the refrigerating compartment satisfies a condition set in advance by the controller, supply of the refrigerant to the evaporator is stopped and the fan installed near the evaporator stops rotating.

이와 같이, 상기 냉각시스템은 냉동실 또는 냉장실의 온도가 제어부에 미리 설정된 조건을 만족하면 압축기를 정지시키고, 상기 냉동실 또는 냉장실의 온도가 소정 온도이상으로 상승되면 압축기를 다시 가동시키는 운전을 반복적으로 수행한다.As described above, the cooling system stops the compressor when the temperature of the freezing compartment or the refrigerating compartment satisfies a preset condition in the controller, and repeatedly operates the compressor again when the temperature of the freezing compartment or the refrigerating compartment rises above a predetermined temperature. .

그러나, 상기 냉각시스템은 삼방변을 절환하여 2개의 증발기 중 어느 하나의 증발기로 냉매를 공급할 경우, 상기 하나의 증발기에 유입된 냉매는 더 이상 압축기로 유입되지 않고 일정량이 증발기에 잔류하게 되는 문제점이 있다.However, when the cooling system supplies refrigerant to one of the two evaporators by switching the three sides, the refrigerant introduced into the one evaporator no longer flows into the compressor and a certain amount remains in the evaporator. have.

이러한 냉각시스템의 운전제어방법은 잔류된 냉매를 회수할 수 없기 때문에냉매부족현상이 발생되며, 이러한 현상에 의해 냉각성능이 상대적으로 저하되는 문제점이 있다.Since the operation control method of the cooling system cannot recover the remaining refrigerant, there is a problem of insufficient refrigerant, which causes a relatively low cooling performance.

또한, 상기 압축기를 다시 운전할 때에 증발기에 잔류된 액냉매가 압축기로 유입됨에 따라 상기 압축기의 실린더 내에서 윤활 문제가 발생되어 압축기의 신뢰성을 확보할 수 없는 문제점이 있다.In addition, when the compressor is operated again, as the liquid refrigerant remaining in the evaporator flows into the compressor, there is a problem in that lubrication problems occur in the cylinder of the compressor, thereby preventing the reliability of the compressor.

상기한 제반 문제점을 해결하기 위해, 본 발명은 냉매사이클 전환시 증발기에 잔류하던 냉매를 회수하여 시스템 내의 냉매부족현상을 방지하도록 하는 것을 목적으로 한다.In order to solve the above problems, an object of the present invention is to recover the refrigerant remaining in the evaporator when the refrigerant cycle is switched to prevent the lack of refrigerant in the system.

도 1은 본 발명 2개의 증발기가 구비된 냉각시스템의 개략적인 구성을 나타낸 구성도.1 is a configuration diagram showing a schematic configuration of a cooling system provided with two evaporators of the present invention.

도 2는 도 1의 냉각시스템의 운전제어방법을 나타낸 선도.FIG. 2 is a diagram illustrating a method for controlling operation of the cooling system of FIG. 1. FIG.

* 도면의 주요 부분에 대한 부호의 설명 *Explanation of symbols on the main parts of the drawings

1 : 압축기 2 : 응축기1: compressor 2: condenser

2a : 응축팬 3 : 삼방변2a: condensation fan 3: three-way

4 : 제1팽창장치 5 : F증발기4: 1st expansion device 5: F evaporator

5a : F팬 6 : 제2팽창장치5a: F fan 6: second expansion device

7 : R증발기 7a : R팬7: R evaporator 7a: R fan

상기 목적을 달성하기 위해, 본 발명은 압축기 및 응축기를 거친 냉매가 삼방변에 의해 절환되어 제1팽창장치와 F증발기를 순차적으로 유동하는 F사이클과, 삼방변에 의해 절환되어 제2팽창장치와 R증발기를 순차적으로 유동하는 R사이클을 선택적으로 수행하는 2개의 증발기가 구비된 냉각시스템에 있어서, 상기 F사이클에서 R사이클로 전환시 상기 삼방변을 소정 시간() 동안 폐쇄하고 압축기를 가동시킴으로써, 상기 F증발기에 잔류된 냉매를 압축기 및 응축기로 회수하도록 함을 특징으로 하는 2개의 증발기가 구비된 냉각시스템의 운전제어방법을 제공한다.In order to achieve the above object, the present invention provides an F cycle through which the refrigerant having passed through the compressor and the condenser is switched by three directions to sequentially flow the first expansion device and the F evaporator, and the second expansion device is switched by three directions. A cooling system having two evaporators for selectively performing an R cycle of sequentially flowing an R evaporator, wherein the three-way displacement is changed to a predetermined time when switching from the F cycle to the R cycle. By closing during the operation and operating the compressor, it provides a method of controlling the operation of the cooling system having two evaporators characterized in that to recover the refrigerant remaining in the F evaporator to the compressor and the condenser.

이하, 본 발명 2개의 증발기가 구비된 냉각시스템에 관해 참조된 도 1 및 도 2를 참조하여 설명하기로 한다.Hereinafter, the present invention will be described with reference to FIGS. 1 and 2 with reference to a cooling system provided with two evaporators.

도 1은 본 발명 2개의 증발기가 구비된 냉각시스템의 개략적인 구성을 나타낸 구성도이고, 도 2는 도 1의 냉각시스템의 운전제어방법을 나타낸 선도이다.1 is a block diagram showing a schematic configuration of a cooling system having two evaporators of the present invention, and FIG. 2 is a diagram showing a method for controlling operation of the cooling system of FIG.

도 1을 참조하면, 상기 냉각시스템은 압축기(1), 응축기(2), 삼방변(3), 2개의 팽창장치(4,6) 및 2개의 증발기(5,7)를 포함하여 구성된다.Referring to Figure 1, the cooling system comprises a compressor (1), a condenser (2), three sides (3), two expansion devices (4, 6) and two evaporators (5, 7).

상기 응축기(2)와 압축기(1) 사이의 냉매배관은 소정 길이 부분이 분지되며, 상기 삼방변(3)은 분지된 부분에 설치된다. 상기 삼방변(3)에 연결된 일측 분지관에는 제1팽창장치(4) 및 F증발기(5)가 설치되고, 타측 분지관에는 제2팽창장치(6) 및 R증발기(7)가 설치된다.The refrigerant pipe between the condenser (2) and the compressor (1) is branched in a predetermined length portion, the three-way side (3) is provided in the branched portion. The first expansion device 4 and the F evaporator 5 are installed in one branch pipe connected to the three sides 3, and the second expansion device 6 and the R evaporator 7 are installed in the other branch pipe.

또한, 상기 응축기(2) 근처에는 응축팬(2a)이 설치되는 한편, 상기 F증발기(5)와 R증발기(7) 근처에는 F팬(5a) 및 R팬(7a)이 각각 설치된다.In addition, a condenser fan 2a is installed near the condenser 2, while an F fan 5a and an R fan 7a are installed near the F evaporator 5 and the R evaporator 7, respectively.

이와 같이 구성된 2개의 증발기가 구비된 냉각시스템의 운전제어방법에 관해 설명하면 다음과 같다.Referring to the operation control method of the cooling system equipped with two evaporators configured as described above are as follows.

먼저, 상기 압축기(1)에서 압축된 냉매는 응축기(2)에서 응축되어 삼방변(3)에 보내지고, 상기 삼방변(3)은 제어부에서 제어함에 따라 냉매를 제1팽창장치(4) 및 F증발기(5)로 보내거나, 혹은 제2팽창장치(6) 및 R증발기(7)로 보낸다.First, the refrigerant compressed by the compressor (1) is condensed in the condenser (2) and sent to the three-way (3), the three-way (3) is controlled by the control unit to control the refrigerant in the first expansion device (4) and It is sent to F evaporator 5, or it is sent to 2nd expansion apparatus 6 and R evaporator 7. As shown in FIG.

상기 증발기에 유입된 냉매는 외기와 열교환됨에 의해 기체상태의 냉매 또는 2상 상태의 냉매로 전환된 후에 압축기(1)로 재유입된다.The refrigerant introduced into the evaporator is introduced into the compressor 1 after being converted into a gaseous state refrigerant or a two-phase state state by heat exchange with outside air.

이와 같은 냉각시스템은 압축기(1) 및 응축기(2)를 거친 냉매를 삼방변(3)에 의해 상기 제1팽창장치(4)와 F증발기(5)를 순차적으로 유동시키는 F사이클과, 상기 제2팽창장치(6)와 R증발기(7)를 순차적으로 유동시키는 R사이클을 선택적으로 수행한다.Such a cooling system includes an F cycle for sequentially flowing the refrigerant passing through the compressor (1) and the condenser (2) by the three-way direction (3) and the first expansion device (4) and the F evaporator (5). The R cycle which sequentially flows the two expansion apparatus 6 and the R evaporator 7 is selectively performed.

이러한 냉각시스템은 F사이클에서 R사이클로 혹은 그 반대로 연속하여 운전되는데, 도 2와 같이 F사이클에서 R사이클로 전환될 때에 상기 삼방변(3)을 소정 시간() 동안 폐쇄하고 압축기(1)를 가동시킴으로써, 상기 F증발기(5)에 잔류된 냉매를 압축기(1) 및 응축기(2)로 회수하도록 한다.This cooling system is operated continuously from the F cycle to the R cycle or vice versa, and when the three-sided (3) is switched to the R cycle from the F cycle as shown in FIG. ) And the compressor 1 is operated to recover the refrigerant remaining in the F evaporator 5 to the compressor 1 and the condenser 2.

이때, 상기 삼방변(3)을 폐쇄할 때에 F팬(5a)을 회동시켜 F증발기(5)에 잔류된 냉매를 증발시키는 것이 바람직하다.At this time, it is preferable to rotate the F fan 5a when the three-way side 3 is closed to evaporate the refrigerant remaining in the F evaporator 5.

이는 상기 압축기(1)에서 F증발기(5)에 잔류된 냉매를 흡입할 때에 상기 F팬(5a)을 회전시켜 F증발기(5)의 냉매를 기화시킴으로써 상기 압축기(1)가 냉매를 흡입하는 성능을 향상시킬 수 있도록 F증발기(5) 내의 압력을 상승시키도록 하기 위함이다.This is because the compressor 1 sucks the refrigerant by rotating the F fan 5a to vaporize the refrigerant of the F evaporator 5 when the compressor 1 sucks the refrigerant remaining in the F evaporator 5. This is to increase the pressure in the F evaporator 5 so as to improve the pressure.

이처럼 압축기(1)에 흡입된 냉매는 응축기(2)에 임시적으로 저장되며, 상기 R사이클이 다시 시작될 때에 삼방밸브가 R증발기(7) 측으로 절환되면 상기 응축기(2)에 저장된 냉매는 R증발기(7)로 유입된다.The refrigerant sucked in the compressor 1 is temporarily stored in the condenser 2. When the three-way valve is switched to the R evaporator 7 when the R cycle is restarted, the refrigerant stored in the condenser 2 is stored in the R evaporator ( 7) flows into.

이와 같이, 상기 F증발기(5)에 잔존하는 냉매를 R사이클 개시 전에 회수하여 응축기(2)에 임시적으로 저장하기 때문에, 상기 냉각시스템 내의 거의 모든 냉매가 냉각작용을 수행하는데 사용될 수 있도록 하였다.Thus, since the refrigerant remaining in the F evaporator 5 is recovered before the start of the R cycle and temporarily stored in the condenser 2, almost all the refrigerant in the cooling system can be used to perform the cooling operation.

이어, 상기 R사이클이 시작되자마자 F증발기(5)로부터 회수한 냉매를 R증발기(7)에 보다 빨리 공급할 수 있기 때문에 냉각시스템의 냉각성능을 보다 향상시킬 수 있으며, 상기 R사이클 시작 초기에 R증발기(7)에 보다 빠른시간 내에 정상상태에 도달될 수 있도록 하였다.Subsequently, since the refrigerant recovered from the F evaporator 5 can be supplied to the R evaporator 7 sooner as soon as the R cycle starts, the cooling performance of the cooling system can be further improved. The evaporator 7 was allowed to reach steady state in a faster time.

또한, 상기 압축기(1)를 재가동하였을 때에 압축기(1)로 액체 냉매가 유입되는 것을 방지함으로써 상기 압축기(1)의 신뢰성을 확보할 수 있다.In addition, the reliability of the compressor 1 can be ensured by preventing the liquid refrigerant from flowing into the compressor 1 when the compressor 1 is restarted.

이와 같이, 본 발명의 기술적 사상은 F사이클에서 R사이클로 전환시 팽창변을 패쇄함과 아울러 압축기 및 F팬을 가동하여 증발기에 잔류하는 냉매를 회수하여 상기 냉각시스템에서 냉매부족현상을 방지하도록 한 것이다.As described above, the technical idea of the present invention is to prevent the shortage of refrigerant in the cooling system by recovering the refrigerant remaining in the evaporator by closing the expansion valve when switching from the F cycle to the R cycle and operating the compressor and the F fan.

이상에서와 같이, 본 발명에 따른 효과는 다음과 같다.As above, the effects according to the present invention are as follows.

첫째, 상기 냉각시스템의 F증발기에 잔존하던 냉매를 회수하여 시스템 내의 냉매부족현상을 방지토록 하였다.First, the refrigerant remaining in the F evaporator of the cooling system was recovered to prevent the refrigerant shortage in the system.

둘째, 상기 F증발기에 아직 남아있는 냉기를 증발시키기 위해 상기 F팬을 회동시킬 때에, 상기 F팬의 작용에 의해 냉동실에 냉기를 공급하여 열효율을 보다 향상시키고, 냉매의 회수를 가속시킬 수 있다.Second, when the F fan is rotated to evaporate the cool air still remaining in the F evaporator, the F fan can supply cold air to the freezing chamber to further improve thermal efficiency and accelerate recovery of the refrigerant.

셋째, 상기 F증발기 내에 냉매가 하는 것을 방지함으로써, 상기 압축기 재가동시 F증발기의 액냉매가 압축기로 유입됨에 따라 액압축에 의한 압손을 방지함으로써, 상기 압축기의 신뢰성을 확보할 수 있도록 하였다.Third, by preventing the refrigerant in the F evaporator, by preventing the pressure loss due to the liquid compression as the liquid refrigerant of the F evaporator flows into the compressor when the compressor restarts, it is possible to ensure the reliability of the compressor.

넷째, 동일용량의 시스템이라도 상대적으로 적은 양의 냉매를 사용할 수 있도록 하였다.Fourth, relatively small amount of refrigerant can be used even with the same capacity system.

Claims (2)

압축기 및 응축기를 거친 냉매가 삼방변에 의해 절환되어 제1팽창장치와 F증발기를 순차적으로 유동하는 F사이클과, 삼방변에 의해 절환되어 제2팽창장치와 R증발기를 순차적으로 유동하는 R사이클을 선택적으로 수행하는 2개의 증발기가 구비된 냉각시스템에 있어서,The refrigerant passing through the compressor and the condenser is switched by three directions to flow the first expansion device and the F evaporator sequentially, and the R cycle switched by the three directions to sequentially flow the second expansion device and the R evaporator. In a cooling system equipped with two evaporators to perform optionally, 상기 F사이클에서 R사이클로 전환시 상기 삼방변을 소정 시간() 동안 폐쇄하고 압축기를 가동시킴으로써, 상기 F증발기에 잔류된 냉매를 압축기 및 응축기로 회수하도록 함을 특징으로 하는 2개의 증발기가 구비된 냉각시스템의 운전제어방법.When the tricycle is switched from the F cycle to the R cycle, a predetermined time ( And operating the compressor so that the refrigerant remaining in the F evaporator is recovered to the compressor and the condenser. 제 1 항에 있어서,The method of claim 1, 상기 삼방변을 폐쇄할 때에 F팬을 회동시켜 F증발기에 잔류된 냉매를 증발시키도록 함을 특징으로 하는 2개의 증발기가 구비된 냉각시스템의 운전제어방법.And closing the three-way valve so that the F fan is rotated to evaporate the refrigerant remaining in the F evaporator.
KR1020020038703A 2002-07-04 2002-07-04 method for controling cooling system with two evaporators KR20040003876A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
KR1020020038703A KR20040003876A (en) 2002-07-04 2002-07-04 method for controling cooling system with two evaporators
DE10260350.2A DE10260350B4 (en) 2002-07-04 2002-12-20 A method of controlling operation of a dual evaporator cooling system
JP2002379190A JP3816872B2 (en) 2002-07-04 2002-12-27 Operation control method of refrigeration system with two evaporators
GB0230334A GB2390419B (en) 2002-07-04 2002-12-31 Controlling the Operation of Cooling Systems Provided With Two Evaporators
CNA021583838A CN1467459A (en) 2002-07-04 2002-12-31 Controlling the operation of cooling systems provided with two evaporators

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100846114B1 (en) * 2007-03-30 2008-07-15 엘지전자 주식회사 Controlling process for refrigerator
US7441413B2 (en) 2004-03-23 2008-10-28 Samsung Electronics Co., Ltd. Refrigerator and control method thereof
WO2008147007A1 (en) * 2007-05-25 2008-12-04 Lg Electronics Inc. Refrigerating system
KR101275182B1 (en) * 2007-05-25 2013-06-18 엘지전자 주식회사 Control method of refrigerating system
KR20150001618A (en) * 2013-06-27 2015-01-06 엘지전자 주식회사 Refrigerator and Control method of the same

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7441413B2 (en) 2004-03-23 2008-10-28 Samsung Electronics Co., Ltd. Refrigerator and control method thereof
KR100846114B1 (en) * 2007-03-30 2008-07-15 엘지전자 주식회사 Controlling process for refrigerator
WO2008147007A1 (en) * 2007-05-25 2008-12-04 Lg Electronics Inc. Refrigerating system
KR101275182B1 (en) * 2007-05-25 2013-06-18 엘지전자 주식회사 Control method of refrigerating system
US8978410B2 (en) 2007-05-25 2015-03-17 Lg Electronics Inc. Refrigerating system having two evaporators performing heat exchange
KR20150001618A (en) * 2013-06-27 2015-01-06 엘지전자 주식회사 Refrigerator and Control method of the same

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