KR20000034314A - Method for controlling temperature of refrigerator - Google Patents

Method for controlling temperature of refrigerator Download PDF

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Publication number
KR20000034314A
KR20000034314A KR1019980051604A KR19980051604A KR20000034314A KR 20000034314 A KR20000034314 A KR 20000034314A KR 1019980051604 A KR1019980051604 A KR 1019980051604A KR 19980051604 A KR19980051604 A KR 19980051604A KR 20000034314 A KR20000034314 A KR 20000034314A
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KR
South Korea
Prior art keywords
refrigerator
temperature
compressor
operation rate
operating ratio
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KR1019980051604A
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Korean (ko)
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최병준
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전주범
대우전자 주식회사
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Priority to KR1019980051604A priority Critical patent/KR20000034314A/en
Publication of KR20000034314A publication Critical patent/KR20000034314A/en

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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
    • 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
    • F25D11/00—Self-contained movable devices, e.g. domestic refrigerators
    • 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
    • F25D2400/00—General features of, or devices for refrigerators, cold rooms, ice-boxes, or for cooling or freezing apparatus not covered by any other subclass
    • F25D2400/34—Temperature balancing devices
    • 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
    • F25D2600/00—Control issues
    • F25D2600/06—Controlling according to a predetermined profile

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

Abstract

PURPOSE: A method for controlling temperature of refrigerator is provided to maintain a proper temperatures in a freezer chamber and a cool chamber and prevent weak cooling phenomenon of the freezer chamber by driving the refrigerator by resetting the driving on/off points of a compressor according to the change of operating ratio when the external room temperature is low. CONSTITUTION: A method for controlling temperature of refrigerator comprises the steps of computing and determining an operating ratio of the refrigerator for a predetermined time period(200), outputting a predetermined control signal if a change of the operating ratio is determined to be a condition for low room temperature(300), resetting on/off temperatures of an operating ratio of a compressor when the ratio is increased or decreased(400,600), and determining whether a difference between a current operating ratio and a preset operating ratio is below than a predetermined value according to the reset operating ratio(500,700).

Description

냉장고의 저실온 제어방법.Low temperature control method of the refrigerator.

본 발명은 냉장고의 저실온 제어방법에 관한 것으로서, 특히 냉장고의 운전율을 판단하여 저실온시 운전율을 재설정함으로써 냉동실의 약냉 현상을 방지하도록 하는 냉장고의 저실온 제어방법에 관한 것이다.The present invention relates to a method for controlling low temperature of a refrigerator, and more particularly, to a method for controlling low temperature of a refrigerator to prevent a weak cooling phenomenon of a freezer compartment by determining an operation rate of the refrigerator and resetting the operation rate at low temperature.

일반적으로 냉장고는 냉각 사이클(Cooling cycle)을 이용하여 식품을 냉동 및 냉장 보관하는데 사용되는 가전제품으로, 압축기(Compressor)에서 고온, 고압으로 압축된 냉매가스를 응축기(Condenser)에서 외기와의 열 교환으로 액화시켜 리시버 드라이어(Receiver dryer)에서 여과한 뒤, 모세관(Capillary Tube)을 통해 저온, 저압의 액냉매로 단열 팽창시키게 된다.Generally, a refrigerator is a household appliance used to freeze and refrigerate food by using a cooling cycle. The refrigerator exchanges refrigerant gas, which has been compressed at high and high pressure in a compressor, to the outside air in a condenser. After liquefied by filtration in the receiver dryer (Receiver dryer), through the capillary tube (Capillary Tube) is adiabatic expansion with low-temperature, low-pressure liquid refrigerant.

특히, 간냉식(Fan-Cooling) 냉장고는 증발기(Evaporator)에서 팬(Fan)에 의해 순환되는 캐비넷 내의 고내(Cavity) 공기와 열을 교환시켜 흡수되는 냉매의 증발열에 의해 수납된 음식물을 냉동 및 냉장시키게 되고, 팬 및 압축기의 구동/정지 제어로서 온도 제어를 수행한다.In particular, a fan-cooling refrigerator exchanges heat with cavity air in a cabinet circulated by a fan in an evaporator to freeze and refrigerate food stored by evaporative heat of refrigerant absorbed. Temperature control is performed as the drive / stop control of the fan and the compressor.

한편, 증발기(Evaporator) 주위의 냉기를 팬에 의해 강제로 대류 시켜 냉각시키는 이러한 간냉식(Fan-Cooling) 냉장고 중에서, 냉장실 온도 중심으로 온도 제어를 하는 냉장고는 냉동실에 하나의 팬을 구비하는데, 냉장실내에서 검출된 온도를 중심으로 냉기를 토출시키는 팬과, 가스 상태의 냉매를 액화시키기 위하여 저압저온 냉매 가스를 고압고온 냉매 가스로 변환시키는 압축기(Compressor)를 구동 제어하여 증발기 주위의 냉기를 냉동실 및 냉장실로 토출시켜서 냉장고의 온도를 적정 온도로 유지시킨다.Meanwhile, among these fan-cooling refrigerators in which cold air around an evaporator is forced to convection by a fan and cooled, a refrigerator having a temperature control centered on a refrigerator compartment temperature has one fan in the freezer compartment. A fan that discharges cold air around the detected temperature and a compressor that converts low-pressure low-temperature refrigerant gas into high-pressure high-temperature refrigerant gas in order to liquefy the refrigerant in a gaseous state. The temperature of the refrigerator is maintained at an appropriate temperature.

부연 설명하면, 검출된 냉장실 온도가 기설정된 적정 상한 온도 이상이면 팬과 압축기를 구동 온 제어하고, 검출된 냉장실 온도가 기설정된 적정 하한 온도 이하이면 팬과 압축기를 구동 오프로 제어하여 냉장실 및 냉동실의 온도 제어를 수행한다.In detail, if the detected refrigerator compartment temperature is higher than or equal to a predetermined upper limit temperature, the fan and the compressor are driven on and controlled. If the detected refrigerator compartment temperature is lower than or equal to the preset lower limit temperature, the fan and the compressor are controlled to be driven off to control the refrigerator and the freezer compartment. Perform temperature control.

그런데, 냉장고가 위치한 장소 주변의 온도가 계속 낮은 상태를 유지하게 되면(저실온시) 냉장실의 내부 온도 역시 낮은 상태를 유지하게 되고, 이에 따라 압축기 구동온 25분, 압축기 구동오프 220분으로 운전함으로써, 팬 및 압축기가 장시간 구동 오프 되게 된다.However, if the temperature around the place where the refrigerator is kept is kept low (at low room temperature), the internal temperature of the refrigerating chamber is also kept low, and thus the compressor is operated at 25 minutes of compressor driving and 220 minutes of compressor driving off. The fan and compressor will be off for a long time.

이러한 문제점을 해결하기 위하여, 외부온도 센서가 감지한 온도가 13℃(저실온) 이하인 경우 압축기와 반대로 센서 부위의 히터를 구동시켜 강제로 압축기를 구동하게 되는데, 압축기가 구동 온일 경우 냉장실 히터를 오프시키고, 압축기가 구동 오프일 경우 냉장실 히터를 온 시키게 된다.In order to solve this problem, when the temperature detected by the external temperature sensor is less than 13 ℃ (low room temperature), the compressor is forced to drive the heater in the sensor region as opposed to the compressor, when the compressor is driven on, the refrigerator compartment heater is turned off If the compressor is off, the refrigerator compartment heater is turned on.

또한, 압축기의 오프 후에 20분 동안 압축기의 재기동을 방지하게 된다.It also prevents the compressor from restarting for 20 minutes after the compressor is turned off.

그런데, 이러한 방법은 냉장실의 온도는 적정 상한온도 이하를 유지할 수 있지만 장시간 팬 및 압축기의 구동 오프로 냉동실의 온도가 상승하여 냉동실 약냉 현상이 발생하게 되는 문제점이 있다.However, this method has a problem that the temperature of the refrigerating compartment can be maintained below the appropriate upper limit temperature, the temperature of the freezer compartment is increased due to the drive off of the fan and the compressor for a long time, the freezer compartment weak cooling phenomenon occurs.

이를 해결하기 위해 임의로 센서의 감지 온도를 높게 설정(외부온도 센서가 감지한 온도가 14℃이상 19℃이하일 경우 압축기 운전의 온/오프시 오프점 -1℃ 하향운전)하여 팬과 압축기를 강제 구동함으로써 냉동실의 온도를 유지하게 된다.To solve this problem, the sensor's sensing temperature is arbitrarily set (when the temperature detected by the external temperature sensor is more than 14 ℃ and less than 19 ℃, the fan and the compressor are driven down by the off point -1 ℃ when the compressor is turned on / off). As a result, the temperature of the freezer compartment is maintained.

그런데, 이러한 경우 별도의 외기온도 센서 및 센서 주위에 히터를 부착해야 하는 등 추가 비용이 발생하게 되는 문제점이 있다.However, in this case, there is a problem in that additional costs are generated such as a separate external temperature sensor and a heater to be attached around the sensor.

본 발명은 상기와 같은 문제점을 해결하기 위하여 창출된 것으로서, 냉장고의 운전율을 판단하여 운전율의 변화에 따라 압축기의 구동온/오프 온도 포인트를 재설정함으로써 냉동실의 약냉 현상을 방지하도록 하는 냉장고의 저실온 제어방법을 제공하는데 그 목적이 있다.The present invention was created in order to solve the above problems, and determines the operation rate of the refrigerator and resets the driving on / off temperature point of the compressor according to the change of the operation rate. The purpose is to provide a room temperature control method.

도1은 본 발명에 따른 냉장고의 저실온 제어방법에 관한 구성도,1 is a block diagram of a method for controlling low temperature of a refrigerator according to the present invention;

도2는 본 발명의 바람직한 실시예에 따른 플로우 차트,2 is a flow chart according to a preferred embodiment of the present invention;

＜도면의 주요부분에 대한 부호의 설명＞<Description of the code | symbol about the principal part of drawing>

10...온도센서 20...센서 감지회로10 ... temperature sensor 20 ... sensor detection circuit

30...마이컴 40...팬 구동부30.Microcomputer 40 ... Fan drive

50...팬 60...압축기 구동부50 ... fan 60 ... compressor drive

70...압축기70 ... compressor

상기 목적을 달성하는 본 발명 냉장고의 저실온 제어방법은, 일정시간 동안 냉장고의 운전율을 계산 및 판단하는 단계와,Low temperature control method of the refrigerator of the present invention to achieve the above object, the step of calculating and determining the operation rate of the refrigerator for a predetermined time;

상기 운전율을 변화를 판단하여 변화시 저실온 조건으로 판단하여 소정의 제어신호를 출력하는 단계와,Judging the operation rate by changing the operation rate, and outputting a predetermined control signal by judging as a low temperature condition when the change occurs;

상기 운전율의 증가 또는 감소시 압축기의 운전율 온/오프 온도점을 각각 재설정하는 단계와,Resetting an operating rate on / off temperature point of the compressor when the operating rate is increased or decreased, respectively;

상기 재설정된 운전율에 따라 구동되는 현운전율과 기설정된 설정운전율의 차이가 기설정된 소정값 이하인지를 판단하는 단계를 포함하여 된 것을 특징으로 한다.And determining whether a difference between the current operation rate and the preset setting operation rate that is driven according to the reset operation rate is equal to or less than a predetermined predetermined value.

상기와 같이 구성된 본 발명의 특징에 의하면, 본 발명에 따른 냉장고의 저실온 제어방법은, 냉장고의 운전율의 변화에 따라 압축기의 구동온/오프 온도 포인트를 재설정함으로써 저실온시 냉동실의 약냉 현상을 방지할 수 있게 된다.According to a feature of the present invention configured as described above, the low temperature control method of the refrigerator according to the present invention, by resetting the drive on / off temperature point of the compressor according to the change in the operation rate of the refrigerator to reduce the weak cooling phenomenon of the freezer at low temperature It can be prevented.

이하, 첨부된 도면을 참조하여 본 발명 냉장고의 저실온 제어방법에 대해 상세히 설명한다.Hereinafter, with reference to the accompanying drawings will be described in detail a low temperature control method of the refrigerator of the present invention.

도1은 본 발명에 따른 냉장고의 저실온 제어방법에 대한 블록도로서, 온도센서(10), 센서 감지회로(20), 마이컴(30), 팬 구동부(40), 팬(50), 압축기 구동부(60), 압축기(70)를 포함한다.1 is a block diagram of a method for controlling a low temperature of a refrigerator according to the present invention, a temperature sensor 10, a sensor sensing circuit 20, a microcomputer 30, a fan driver 40, a fan 50, and a compressor driver. 60, the compressor 70 is included.

이러한 구성에 있어서, 온도센서는(10)는 냉장실내의 소정 위치에 설치되어 냉장실의 실내 온도를 검출하여 냉장실 온도 검출 신호를 후출하는 마이컴(30)의 A/D(Analog to Digital)포트로 인가한다.In this configuration, the temperature sensor 10 is installed at a predetermined position in the refrigerating compartment, and detects the room temperature of the refrigerating compartment to return to the A / D (Analog to Digital) port of the microcomputer 30 that outputs a refrigerating compartment temperature detection signal. Is authorized.

그리고, 센서 감지회로(20)는 온도센서(10)로부터 감지된 온도 검출 신호를 변환하여 후술하는 마이컴(30)의 A/D 포트로 인가한다.Then, the sensor detection circuit 20 converts the temperature detection signal detected by the temperature sensor 10 and applies it to the A / D port of the microcomputer 30 which will be described later.

한편, 마이컴(30)은 센서 감지회로(20)로부터 A/D포트를 통하여 온도 검출 신호가 인가되고, 운전율을 측정 및 판단하게 된다.Meanwhile, the microcomputer 30 receives a temperature detection signal from the sensor sensing circuit 20 through the A / D port, and measures and determines the operation rate.

그리고, 일정시간 동안 운전율의 누적치를 측정하여 변화가 없을 경우 통상운전을 수행한다.And, if there is no change by measuring the cumulative value of the operation rate for a predetermined time and performs normal operation.

또한, 운전율의 변화가 있을 경우 압축기(70)의 구동온/오프 포인트를 재설정하여 제어 신호를 출력하게 된다.In addition, when there is a change in the operation rate, the control signal is output by resetting the driving on / off point of the compressor 70.

팬 구동부(40)는 구동 소자 및 릴레이 등을 이용하여 마이컴(30)의 제어에 의거하여 소정 구동 신호를 팬(50)으로 출력하며, 팬(50)은 팬 구동부(40)로부터의 구동 신호에 의거하여 구동되어 도시 생략된 증발기 주변의 냉기를 냉동실과 냉장실로 토출시킨다.The fan driver 40 outputs a predetermined drive signal to the fan 50 under the control of the microcomputer 30 using a drive element, a relay, and the like, and the fan 50 is connected to the drive signal from the fan driver 40. Driven on the basis to discharge the cold air around the evaporator (not shown) to the freezer compartment and the refrigerating compartment.

또한, 압축기 구동부(60)는 구동 소자 및 릴레이 등을 이용하여 마이컴(30)의 제어에 의거하여 소정 구동 신호를 압축기(70)로 출력하며, 압축기(70)는 상술한 바 있는 냉동 사이클에서 기화된 냉매를 다시 액화시켜 재사용하기 위한 준비 단계로 도시 생략된 증발기로부터의 저온저압의 냉매 가스를 고온고압의 냉매 가스로 압축 변환하여 도시 생략된 응축기로 출력한다.In addition, the compressor driver 60 outputs a predetermined drive signal to the compressor 70 under the control of the microcomputer 30 using a drive element, a relay, or the like, and the compressor 70 is vaporized in the aforementioned refrigeration cycle. As a preliminary step for liquefying and reusing the used refrigerant, the refrigerant gas of low temperature and low pressure from the evaporator, not shown, is compressed and converted into a refrigerant gas of high temperature and high pressure, and outputted to a condenser, not shown.

다음에, 상술한 구성부를 포함하는 본 발명의 바람직한 실시예에 따른 냉장고의 저실온 제어 과정을 첨부한 도2의 흐름도를 참조하여 상세히 설명한다.Next, the low temperature control process of the refrigerator according to the preferred embodiment of the present invention including the above-described configuration will be described in detail with reference to the flowchart of FIG. 2.

먼저, 냉장고의 통상운전 시에(단계100) 냉장실의 온도를 검출하는 온도 센서는 냉장실 온도를 검출하여 냉장실 온도 검출 신호를(일반적으로 직류 레벨의 전압값) 마이컴의 A/D포트로 인가하게 된다.First, during normal operation of the refrigerator (step 100), the temperature sensor detecting the temperature of the refrigerator compartment detects the temperature of the refrigerator compartment and applies a refrigerator compartment temperature detection signal (generally, a DC level voltage value) to the microcomputer A / D port. .

그리고, 마이컴은 일정시간 동안 냉장고의 운전율을 측정 및 판단하게 된다.(단계200)Then, the microcomputer measures and determines the operation rate of the refrigerator for a predetermined time (step 200).

다음에, 운전율의 변화가 있을 경우 마이컴은 저실온 조건으로 판단하여 제어신호를 출력한다.(단계300)Next, if there is a change in the driving rate, the microcomputer determines that the low temperature condition is output and outputs a control signal (step 300).

한편, 상술한 단계에서 저실온일 경우 냉장실의 온도도 상대적으로 낮게되는데, 팬과 압축기가 장시간 구동 오프를 유지하기 때문에 팬과 압축기의 구동율이 낮아져서 냉동실의 약냉 현상이 발생할 수 있다.On the other hand, when the room temperature is low in the above-described step, the temperature of the refrigerating chamber is also relatively low. Since the fan and the compressor maintain the driving off for a long time, the driving ratio of the fan and the compressor may be lowered, which may cause a weak cooling phenomenon in the freezer compartment.

따라서, 본 발명에서는 운전율의 변화시 압축기의 구동온/오프 온도 포인트를 재설정하게 되는데, 운전율을 감소시와(단계400) 운전율의 증가시에(단계600) 이에 대응하도록 운전율을 재설정하게 된다.Therefore, in the present invention, when the operation rate is changed, the driving on / off temperature point of the compressor is reset, and the operation rate is reset so as to correspond to the decrease in the operation rate (step 400) and the increase in the operation rate (step 600). Done.

이어서, 운전율의 감소시 이에 대응하도록 재설정된 운전율에 따라 냉장고를 운전하고, 기설정된 압축기의 설정운전율과 현운전율의 차이가 소정값 이하인지를 판단하게 된다.(단계500)Subsequently, when the operation rate decreases, the refrigerator is operated according to the operation rate reset to correspond thereto, and it is determined whether the difference between the preset operation rate and the current operation rate of the preset compressor is less than or equal to the predetermined value.

다음에, 운전율의 증가시 이에 대응하도록 재설정된 운전율에 따라 냉장고를 운전하고, 기설정된 압축기의 설정운전율과 현운전율의 차이가 소정값 이하인지를 판단하게 된다.(단계600)Next, when the operation rate is increased, the refrigerator is operated according to the operation rate reset to correspond thereto, and it is determined whether the difference between the preset operation rate and the current operation rate of the preset compressor is less than or equal to the predetermined value.

즉, 압축기의 설정 운전율이 현운전율 이상일 경우 최종 단계를 검출하여 압축기의 구동온점이 구동오프점 이상인지를 판단하게 된다.(단계180)That is, when the set operation ratio of the compressor is equal to or greater than the current operation ratio, the final stage is detected and it is determined whether the driving on point of the compressor is equal to or higher than the driving off point.

이상 설명한 바와 같이 본 발명에 따르면, 냉장실 온도 중심으로 냉장고의 온도를 제어함에 있어서, 냉장고의 외부 온도가 저실온시 냉장고의 운전율을 판단하여 운전율의 변화시 이에 대응하도록 압축기의 구동온/오프 포인트를 재설정하여 냉장고를 구동시킴으로써 냉동실의 약냉 현상을 방지하면서 냉동실 및 냉장실을 적정 온도를 유지할 수 있는 효과가 있다.As described above, according to the present invention, in controlling the temperature of the refrigerator based on the temperature of the refrigerator compartment, the operation of the compressor is turned on / off so as to determine the operation rate of the refrigerator when the external temperature of the refrigerator is low, and to respond to the change of the operation rate. By resetting the point to operate the refrigerator, there is an effect of maintaining a proper temperature in the freezer compartment and the refrigerating compartment while preventing a weak cooling phenomenon of the freezer compartment.

Claims (1)

일정시간 동안 냉장고의 운전율을 계산 및 판단하는 단계와,Calculating and determining an operation rate of the refrigerator for a predetermined time; 상기 운전율을 변화를 판단하여 변화시 저실온 조건으로 판단하여 소정의 제어신호를 출력하는 단계와,Judging the operation rate by changing the operation rate, and outputting a predetermined control signal by judging as a low temperature condition when the change occurs; 상기 운전율의 증가 또는 감소시 압축기의 운전율 온/오프 온도점을 각각 재설정하는 단계와,Resetting an operating rate on / off temperature point of the compressor when the operating rate is increased or decreased, respectively; 상기 재설정된 운전율에 따라 구동되는 현운전율과 기설정된 설정운전율의 차이가 기설정된 소정값 이하인지를 판단하는 단계를 포함하여 된 것을 특징으로 하는 냉장고의 저실온 제어방법.And determining whether a difference between the current operation rate and the preset setting operation rate that is driven according to the reset operation rate is equal to or less than a predetermined predetermined value.
KR1019980051604A 1998-11-28 1998-11-28 Method for controlling temperature of refrigerator KR20000034314A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100577122B1 (en) * 1999-08-30 2006-05-09 삼성전자주식회사 Method of controlling compartment temperature for a refrigerator
CN109425195A (en) * 2017-08-30 2019-03-05 合肥美的电冰箱有限公司 Refrigerator temperature control method, device and refrigerator

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100577122B1 (en) * 1999-08-30 2006-05-09 삼성전자주식회사 Method of controlling compartment temperature for a refrigerator
CN109425195A (en) * 2017-08-30 2019-03-05 合肥美的电冰箱有限公司 Refrigerator temperature control method, device and refrigerator

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