KR960001991B1

KR960001991B1 - Refrigerator

Info

Publication number: KR960001991B1
Application number: KR1019910014059A
Authority: KR
Inventors: 윤광현
Original assignee: 삼성전자주식회사; 강진구
Priority date: 1991-08-14
Filing date: 1991-08-14
Publication date: 1996-02-08
Also published as: KR930004733A

Abstract

discriminating the operating state of the refrigerator; if the operation of the refrigerator is at the middle state, checking the temperature therein; if the sensed temperature is lower than the middle one, operating the refrigerator at highest or lowest state after performing 5 time-middle cycle; if the sensed temperature is higher, operating the refrigerator at the highest state by memorizing the number of cycles at the highest or lowest state; checking the temperature during the operation at the lowest state; if the checked temperature is lower than a reference temperature during the operation at the lowest state, operating the refrigerator at the lowest state; if it is higher, operating it at the highest state; if the number of cycles during the highest operation is little than that during the lowest and middle state, operating the refrigerator at the highest state; and if it is much more, operating the refrigerator at the middle state.

Description

Automatic temperature control method of the refrigerator

제1도는 종래의 냉장고 고내온도 제어상태를 나타낸 그래프.1 is a graph showing a high temperature control state of a conventional refrigerator.

제2도는 본 발명에 적용되는 냉장고의 개략블럭도.2 is a schematic block diagram of a refrigerator applied to the present invention.

제3도는 본 발명 자동온도제어방법의 플로우챠트.3 is a flowchart of the automatic temperature control method of the present invention.

제4도는 본 발명에 의한 고내온도제어상태를 나타낸 그래프.4 is a graph showing a high internal temperature control state according to the present invention.

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

1 : 마이콤 2 : 마이콤주변회로1: Microcomputer 2: Microcomputer peripheral circuit

3 : 운전상태감지부 4 : 온도감지부3: operation state detection unit 4: temperature detection unit

5 : 부하구동부5: load driving part

본 발명은 냉장고의 자동온도제어방법에 관한 것으로, 특히 냉장고의 고내온도가 부하변동 및 사용빈도에 따라 변화되는 고내온도를 운정상태에 대한 제어기준온도와 비교하여 감지된 온도에 대하여 운전상태를 변경, 구동시킴으로써 변경된 운전상태로 고내온도를 자동조절할 수 있도록 한 냉장고의 자동온도제어방법에 관한 것이다. 일반적으로 냉장고는 고내온도조절을 온도조절기에 의한 온도설정과 온도센서에 의한 감지된 온도로 조절하면서 사용하도록 되어 있는바, 상기 온도조절기는 냉장고 사용시 한번 온도설정을 해놓게 되면, 특별히 많은 식품을 저장하기 전에는 온도조절기에서 설정된 온도 상태를 기준하여 온도센서에 의한 고내온도감지상태에 따라 온도조절하면서 사용하는 것이 보통이었다.The present invention relates to an automatic temperature control method of a refrigerator, and in particular, an operating state is changed with respect to a sensed temperature by comparing the inside temperature at which the inside temperature of the refrigerator is changed according to the load variation and the use frequency with the control reference temperature for the driving state. The present invention relates to an automatic temperature control method of a refrigerator, which is capable of automatically adjusting the internal temperature of the refrigerator to a changed operating state by driving the same. In general, the refrigerator is used to control the internal temperature control by adjusting the temperature set by the temperature controller and the sensed temperature by the temperature sensor. The temperature controller stores a lot of food especially when the temperature is set once when the refrigerator is used. Prior to this, it was common to use the temperature control according to the internal temperature sensing state by the temperature sensor based on the temperature state set in the temperature controller.

따라서 상기 온도조절기가 온도설정된 상태에서 많은 식품이 저장될 경우, 제1도에 도시한 바와 같이, 예를들어 온도조절기가 중온도로 조절되어 있을 경우 고내온도변화는 중온도를 중심으로 하여 압축기와 댐퍼를 구동시키도록 되어 있어, 상기 많은 식품이 저장될 경우 고내온도는 그만큼 상승하게 되므로, 상기 많은 저장식품을 온도조절기에서 설정된 중온도로 낮추려면 장시간이 걸리게 될 뿐 아니라 그만큼 장시간 동안 압축기와 댐퍼를 자주 구동시켜야 하기 때문에 장시간 구동에 따른 소비전력이 많게 되는 문제점을 가지게 되었다.Therefore, when a large amount of food is stored in a state in which the temperature controller is set, as shown in FIG. 1, for example, when the temperature controller is adjusted to medium temperature, the change in temperature inside the compressor is mainly caused by the compressor and damper. Since the internal temperature is increased by the amount of food when the food is stored, it takes a long time to lower the temperature of the stored food to a medium temperature set by the temperature controller as well as frequently drives the compressor and the damper for such a long time. Since it has to be a problem, the power consumption is increased according to the long time driving.

본 발명의 목적은 냉장고의 고내온도를 온도센서로 감지하되, 저장식품의 변동전동에 따라 감지되는 고내 온도 변화정도를 운전상태에 대한 제어기준온도와 비교하여 감지온도에 대하여 운전상태를 변경시켜 운전변경 상태에 따른 기준온도로 온도조절되도록 함으로써 온도조절기 없이도 저장식품의 정도에 따라 자동으로 고내온도가 자동조절되는 냉장고를 제공하는데 있으며, 본 발명의 다른목적은 저장식품의 량에 따라 변화하게 되는 고내온도를 소정시간동안 운전정도를 변화하면서 온도조절을 하도록 하되 제어기준온도 이상에서 상승되는 시간을 소정단계로 구분하여 그 단계에 따라 운전상태를 조절하도록 하고, 특정시간 또는 일정시간동안 고내온도상승이 없을 때에는 자동으로 절전운전되도록 하여 불필요한 운전구동에 따른 소비전력을 줄일 수 있는 자동온도제어방법을 제공하는데 있다.An object of the present invention is to detect the internal temperature of the refrigerator with a temperature sensor, by comparing the degree of change in the internal temperature detected according to the fluctuation of the stored food compared with the control reference temperature for the operating state to change the operation state for the operation temperature It is to provide a refrigerator in which the internal temperature is automatically adjusted according to the degree of stored food without a temperature controller by adjusting the temperature to a reference temperature according to the changed state, another object of the present invention is to change the amount of stored food in accordance with the amount of stored food The temperature is controlled by changing the operation degree for a predetermined time, but the temperature rising above the control reference temperature is divided into predetermined steps to adjust the operation state according to the step. When there is no power, it automatically saves power and consumes power according to unnecessary operation. To provide automatic temperature control method that can reduce.

상기의 목적을 실현하기 위하여 본 발명은 현재 운전상태를 판단하는 단계와, 상기 현운전단계에서 판단된 운전상태의 온도와 감지된 운도와 비교하는 단계와, 상기 비교단계에서 감지온도가 높을 경우 소정의 시간대로 구분하여 구분된 시간대에 따라 소정운전 상태인 강, 중 또는 약운전을 하도록 하는 운전단계로 이루어지도록 한 것을 특징으로 한다.In order to achieve the above object, the present invention provides a method of determining a current driving state, comparing a temperature of a driving state determined in the current driving stage with a detected cloudiness, and a predetermined value when the sensing temperature is high in the comparing step. It is characterized in that it is made of a driving step to make a predetermined driving state of the river, middle or weak driving according to the divided time zone.

이하 첨부된 도면에 의거 본 발명을 상세히 설명하면 다음과 같다.Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

제2도는 본 발명 자동온도제어방법이 적용되는 냉장고의 개략적인 블럭도로서, 내부의 프로그램에 따라 냉장고의 전체구동을 제어하는 마이콤(1)과, 상기 마이콤(1)에 동작전원공급, 초기상태리세트, 클럭신호를 발생시키는 마이콤주변회로(2)와, 운전상태를 감지하는 운전상태감지부(3)와, 냉동, 냉장실내의 온도를 감지하는 온도감지부(4)와, 마이콤(1)의 제어에 따라 압축기(C), 제상히터(HT), 냉장실댐퍼(RD)을 각기 구동시키는 부하구동부(5)로 구성되며, 이는 먼저 마이콤주변회로(2)의 신호에 의하여 마이콤(1)의 프로그램된 상태로 각부를 제어하게 되는데, 이때 온도감지부(4)에서는 고내온도를 감지하여 감지된 신호를 마이콤(1)에 입력시키면 마이콤(1)에서는 운전상태감지부(3)를 통해 감지된 운전상태로 입력된 신호를 제어하여 부하구동부(5)를 통해 압축기(C), 제상히터(HT), 냉장고댐퍼(RD)를 카운트하면서 제어하여 냉장고의 고내온도를 자동조절하도록 되어 있다. 제3도는 본 발명 자동온도제어방법의 플로우챠트로서, 냉장고의 현재운전 상태 강, 중, 약인가를 편별하는 현운전판별단계(300)와, 상기 현운전판별단계(300)에서 판별된 운전상태가 중운전 상태일 때 감지온도가 중온도상한치 이상인가를 판별하는 중온도판별단계(301)와, 상기 중온도판별단계(301)에서 감지온도가 중온도상한치보다 작으면 정상 중운전사이클이 5회 이상인가를 판별한 후, 5회 이상이 아니면 중운전하도록 하는 중운전단계(303)와, 상기 중운전단계(303)에서 5이상이면 약운전하는 약운전단계(304)와, 상기 중온도판별단계(301)에 감지온도가 중온도상한치보다 크면 소정시간 이내인가를 판별하여 소정시간이내이면 약운전라는 소정시간 판별단계(305)와, 상기 소정시간 판별단계(305)에서 소정시간이 경과하고 중온도가 소정의 제1시간이내인가를 판별하여 제1소정시간이내이면 강운전사이클 1을 기억시킨 후 강운전을 수행하는 제1소정시간판별단계(306)와, 상기 제1소정시간판별단계(306)에서 제1소정시간이 경과하면 중온도가 제2소정시간이내인가를 판별하여 중온도가 제2소정시간이내이면 강운전 사이클 2를 기억시킨 후 강운전을 수행하고, 상기 중온도가 제2소정시간이 경과하면 강운전사이클 3을 기억시킨 후 강운전을 수행하는 제2소정시간판별단계(307)와, 상기 현운전판별단계(300)에서 판별된 상태가 약운전일때 감지온도가 약온도상한치 이상인가를 판별하는 약온도판별단계(302)와, 상기 약온도판별단계(302)에서 감지온도가 약온도 상한치보다 크면 소정시간이내인가를 판별하여 약온도가 소정시간이내이면 중운전을 수행하는 소정시간판별단계(308)와, 상기 소정시간판별단계(308)에서 소정시간이 경과하고 약온도가 제2소정시간 이상인가를 판별하는 제2소정시간 이상이면 강운전사이클 2를 기억시킨 후 강운전하고, 제2소정시간이내이면 강운전사이클 1을 기억시킨 후 강운전을 수행하는 제1소정시간 판별단계(309)와, 상기 현운전판별단계(300)에서 판별된 상태가 강운전일 경우 강운전 사이클이 강운전사이클횟수보다 큰가를 판단하여 크면 강운전을 수행하는 강운전판단단계(310)와, 상기 강운전판단단계(310)에서 강운전사이클이 크면 강운전 사이클 횟수를 클리어시키고 중운전을 하는 중운전단계(311)로 이루어지도록 한 것이다. 상기와 같은 단계들로 이루어지는 본 발명의 작용효과를 설명하면 다음과 같다. 먼저 냉장고가 가동중인 상태에서, 제2도의 마이콤주변회로(2)로부터 신호가 입력되고, 온도감지부(4)에 의햐여 냉장고내에 식품에 따른 고내온도가 감지된 입력신호가 마이콤(1)에 입력되고, 마이콤(1)에서는 우선 운전상태감지부(3)로부터 현재 냉장고의 운전상태가 어떤 운전상태인가를 제3도의 현운전판단단계(300)에서 판별하게 된다.2 is a schematic block diagram of a refrigerator to which the automatic temperature control method of the present invention is applied. The microcomputer 1 controls the overall operation of the refrigerator according to an internal program, and the operating power is supplied to the microcomputer 1, and an initial state is shown in FIG. The microcomputer peripheral circuit 2 for generating reset and clock signals, the operating state sensing unit 3 for detecting the operating state, the temperature sensing unit 4 for sensing the temperature in the freezer and refrigerator compartment, and the microcomputer 1 The load driving unit 5 drives the compressor C, the defrost heater HT, and the refrigerating chamber damper RD according to the control of the control unit, which is first controlled by the signal of the microcomputer peripheral circuit 2. Each part is controlled in the programmed state of the temperature sensor 4, and the temperature detection unit 4 detects a high temperature inside and inputs a detected signal to the microcomputer 1, whereby the microcomputer 1 detects the operation state 3. Through the load driving unit 5 by controlling the input signal in the operating state The control and the accumulation count (C), defrost heater (HT), the refrigerator damper (RD) is adapted to automatically adjust the inside temperature of the refrigerator. 3 is a flowchart of the automatic temperature control method of the present invention, wherein the operation operation discrimination step 300 for discriminating between the current operation state strong, medium, and weak application of the refrigerator and the operation state determined in the current operation determination step 300 are performed. If the sensing temperature is less than the upper limit of the middle temperature in the middle temperature judging step (301) and the middle temperature judging step (301) to determine whether the detected temperature is higher than the upper limit of the middle temperature in the heavy operation state, After determining whether more than five times, if not more than five times the heavy operation step 303, if the five or more in the heavy operation step 303, weak operation step 304 for weak operation and the medium temperature If the detected temperature is greater than the upper limit of the middle temperature in the determination step 301, it is determined whether it is within a predetermined time, and if it is within a predetermined time, a predetermined time determination step 305 called weak operation and a predetermined time have elapsed in the predetermined time determination step 305. And the medium temperature is within the first predetermined time If the first predetermined time is within the first predetermined time, the first predetermined time judging step 306 and the first predetermined time judging step 306 to store the strong driving cycle 1 and then carry out the strong driving have elapsed. If the medium temperature is within the second predetermined time, if the medium temperature is within the second predetermined time, if the medium temperature is within the second predetermined time, the strong driving cycle 2 is memorized and the strong driving is performed. The second predetermined time judging step 307 for carrying out strong driving after storing 3, and the weak temperature for judging whether the detected temperature is higher than the upper limit of the weak temperature when the state determined in the current driving judging step 300 is weak operation. The determination step 302 and the predetermined temperature discrimination step 308 for determining whether the detected temperature is greater than or equal to the upper limit of the predetermined temperature in the medicine temperature judging step 302 to perform a heavy operation if the medicine temperature is within the predetermined time. And, in the predetermined time determination step 308 If the predetermined time has elapsed and the temperature is equal to or greater than the second predetermined time or more, the driving time is stored after the strong driving cycle 2 is stored. The first predetermined time determining step 309 for performing the step, and if the state determined in the current operation discriminating step 300 is a strong driving to determine whether the strong driving cycle is greater than the number of strong driving cycles In the driving determination step 310 and the strong driving determination step 310, if the strong driving cycle is large, the heavy driving cycle is cleared and the heavy driving step 311 is performed to perform the heavy driving. Referring to the operation and effect of the present invention made of the above steps are as follows. First, while the refrigerator is in operation, a signal is input from the microcomputer peripheral circuit 2 of FIG. 2, and an input signal in which the high temperature inside the refrigerator is sensed in the refrigerator by the temperature sensing unit 4 is input to the microcomputer 1. In operation, the microcomputer 1 first determines from the operation state detecting unit 3 what kind of operation state the operation state of the current refrigerator is in the current operation determination step 300 of FIG.

따라서, 상기 현운전판단단계(300)에서 중운전상태로 판단될 경우, 상기 온도감지부(4)에서 감지된 감지온도와 상기 운전상태감지부(3)로부터 감지된 중운전상태에 따른 중온도 상한치와 고저를 중온도판별단계(301)로 비교판단하게 되며, 이때 중온도는 냉동실경우 -18±2℃로 제어하고 상한치는 -16℃가 된다.Therefore, when it is determined that the medium operation state in the current operation determination step 300, the medium temperature according to the detected temperature detected by the temperature detection unit 4 and the heavy operation state detected by the operation state detection unit 3 The upper limit and the high and low are compared with the middle temperature determination step 301. At this time, the middle temperature is controlled at -18 ± 2 ° C. in the freezer, and the upper limit is -16 ° C.

따라서 -16℃보다 감지온도가 높게 되면 소정시간판별단계(305)에서 감지된 감지온도가 중온도상한치를 초과하는 시간을 측정하여 소정시간(3분) 이내이면 그대로 약운전을 하고, 상기 소정시간 판별단계(305)에서 3분 이상이 되면 제1소정시간판별단계(306)에서 상기 감지온도가 중온도 상한치를 초과하는 시간이 제1소정시간(10분)이내이면 강운전시 운전해야 할 강운전사이클 1을 버퍼에 기억시킨 후 강운전을 하며 상기 제1소정시간(3분) 이상이 되면 제1소정시간판별단계(307)에서 상기 감지온도가 중온도상한치를 초과하는 시간이 제2소정시간(20분)이내이면 강운전시 운전해야 할 강운전사이클 2를 버퍼에 기억시키고, 제2소정시간(20분) 이상이면 강운전사이클 3을 버퍼에 기억시켜서 제어기준온도를 강운전하여 고내온도를 제어하는 다시말하면 제4도에 도시한 바와같이 중운전상태에서 감지온도가 중온도 상한치 이상으로 상기 소정시간 유지될 때 운전제어기준온도를 강운전기준온도로 변경하여 제2도의 부하구동부(5)의 압축기(C)와 냉장고 댐퍼(RD)를 강운전으로 구동시킴으로써, 감지온도(B')가 보다 따른 시간(TN)에 중운전상태의 중온도에 도달시킬 수 있게 된다.Therefore, if the sensing temperature is higher than -16 ℃, the time measured by the predetermined time discrimination step 305 exceeds the upper limit of the middle temperature is measured, and if it is within a predetermined time (3 minutes), the operation is performed as it is, the predetermined time When the determination step 305 is 3 minutes or more, if the time when the detected temperature exceeds the upper limit of the middle temperature in the first predetermined time determination step 306 is within the first predetermined time (10 minutes) After the cycle 1 is stored in the buffer, the driving operation is performed, and when the first predetermined time (3 minutes) or more is reached, the time when the detected temperature exceeds the upper limit of the middle temperature in the first predetermined time determination step 307 is the second predetermined time. If it is within 20 minutes, the driving cycle 2, which should be operated during strong driving, is stored in the buffer. If the driving time is over the second predetermined time (20 minutes), the driving cycle 3 is stored in the buffer. In other words to control As shown in the figure, when the sensing temperature is maintained above the upper limit of the middle temperature for the predetermined time, the operation control reference temperature is changed to the strong driving reference temperature so that the compressor C and the refrigerator damper of the load driving section 5 of FIG. By driving the RD in the strong driving mode, it is possible to reach the medium temperature in the medium driving state at the time TN at which the sensing temperature B 'is more.

한편, 상기 중온도판별단계(301)에서 감지온도가 중온도상한치를 초과하지 않는 경우 중운전단계(303)에서 정상중 운전사이클이 몇번 진행되었는가를 판별하여 5회 이하이면 중온도를 계속 유지하는 중운전을 수행하고, 중운전사이클이 5회 이상이 냉장고를 사용하지 않거나, 야간으로 판단하여 약운전으로 약온도기준 온도로 변경하여 부하구동부(5)의 압축기(C)와 냉장고댐퍼(RD)를 구동시켜 약운전을 하게 된다. 또한 상기 현운전판단단계(300)에서 약운전상태로 판단된 셩우, 상기 중운전단계들에서와 같이 약온도판별단계(302)에서 감지온도가 약운전상한치 이상인가를 판별하고, 이하이면 그대로 약운전을 하고, 소정시간판별단계(308)에서 감지온도가 약운전상한치를 소정시간(3분) 초과하면 그대로 중온도로 하여 중운전을 하며, 상기 감지온도가 약운전상한치를 초과하는 시간이 3분 이상이 되면 제1소정시간판단단계(309)에서 3분 이상 제1소정시간(10분) 이내이면 강운전시 운전해야 할 강운전사이클 2를 버퍼에 기억시킨 후 강운전하고, 상기 제1소정시간 판단단계(309)에서 감지온도가 약운전상한치의 초과하는 시간 10분 이상이면 강운전시 운전해야 할 강운전사이클 1을 버퍼에 기억시킨 후 제어기준온도를 강운전으로 하는 압축기(C)와 냉장고댐퍼(RD)를 구동시킨다.On the other hand, if the detected temperature does not exceed the upper limit of the middle temperature in the medium temperature determination step 301, it is determined how many times the normal operation cycle has been carried out in the medium operation step 303, and if it is 5 times or less, the medium temperature is continuously maintained. After the operation is performed, the medium operation cycle does not use the refrigerator at least five times, or it is determined at night to change the weak temperature reference temperature in the weak operation to change the compressor (C) and the refrigerator damper (RD) of the load driving unit (5). We drive and run weakly. In addition, if it is determined that the weak operation state in the current operation determination step 300, as in the medium operation stages, it is determined whether the detected temperature is above the upper limit of the weak operation in the weak temperature determination step 302, and if it is less than about If the detected temperature exceeds the weak operation upper limit value for a predetermined time (3 minutes) in the predetermined time discrimination step 308, heavy operation is performed with the medium temperature as it is, and the time for which the detected temperature exceeds the weak operation upper limit value is 3 minutes. If more than 3 minutes in the first predetermined time determination step (309) within the first predetermined time (10 minutes), the first driving time is stored in the buffer of the strong driving cycle 2 to be operated during the strong driving operation, and then the first predetermined time determination In step 309, if the detected temperature exceeds 10 minutes above the upper limit of the weak operation, the compressor C and the refrigerator damper storing the driving cycle 1 to be operated in the strong driving in the buffer and then setting the control reference temperature in the strong driving ( Drive RD) Kinda.

또한 상기 현운전판단단계(300)에서 강운전상태로 판단된 경우, 강운전 판단단계(310)에서 강운전사이클이 상기 중운전, 약운전시 고내온도상승을 판단하여 버퍼에 기억된 강운전사이클 횟수만큼 운전을 하고 있는가를 판단하여 강운전사이클이 강운전사이클 횟수만큼 운전되지 않았으면 계속 강운전을 하고, 상기 강운전사이클이 상기 강운전사이클 횟수만큼 운전되었으면 중운전단계(311)에서 상기 강운전사이클 횟수를 클리어시키고 중온도로 하는 압축기(C)와 탬퍼(RD)를 구동시켜 중운전를 하도록 한 것이다.In addition, when it is determined in the current driving determination step 300 in the strong driving state, in the strong driving determination step 310, the heavy driving cycle stored in the buffer by determining the temperature rise in the high temperature during the medium operation, weak operation If it is determined that the driving has been performed as many times as the number of times the strong driving cycle is not driven by the number of strong driving cycles continue to drive strong, and if the strong driving cycle has been operated by the number of strong driving cycles in the heavy operation step 311 The cycle number was cleared and the compressor C and the tamper RD were driven at medium temperature for heavy operation.

이상에서 설명한 바와같이 본 발명은 냉장고의 고내온도를 온도센서로 감지하되 저장식품의 량에 대한 감지된 고내온도를 냉장고의 운전상태에 따른 제어기준온도와 비교하여 감지된 고내온도에 대하여 운전상태를 변경시켜 줌으로써 온도조절이 자동으로 이루어지도록 하여 사용자가 저장식품정도에 따라 일일이 온도조절을 해야 하는 불편함을 해소할 수 있는 동시에, 온도조절기가 불필요하게 되어 온도조절기 설치에 따른 제반문제점을 해소할 수 있는 효과를 제공하게 되는 것이다.As described above, the present invention detects the inside temperature of the refrigerator with a temperature sensor, but compares the detected inside temperature for the amount of food stored with the control reference temperature according to the operating state of the refrigerator to determine the operating state with respect to the inside temperature. By changing the temperature, the temperature control is automatically performed, so that the user can eliminate the inconvenience of having to adjust the temperature according to the degree of stored food, and at the same time, there is no need for the temperature controller, thereby eliminating the problems associated with the installation of the temperature controller. It will provide an effect.

Claims

In the automatic temperature control method of the refrigerator which detects the inside temperature of the refrigerator by a temperature sensor and automatically controls the inside temperature at the detected temperature, determining whether the operation state of the refrigerator is strong, medium or weak. A middle temperature judging step 300 and a middle temperature judging step 301 for judging whether the detected temperature is equal to or higher than a temperature upper limit when the operation state determined in the current run judging step 300 is a medium operation; In step 301, if the detected temperature is lower than the upper limit of the middle temperature, the heavy operation cycle determines five or more times, and then performs a strong driving or weak operation (303) and 304. If the detected temperature is higher than the upper limit of the middle temperature, Predetermined time determination steps (305 to 306) for driving the vehicle while storing the number of the weak operation or the temporary operation cycle for each predetermined time elapsed unit, and the detected temperature is higher than the upper limit of the weak temperature during the weak operation in the current operation determination step (300). is it In the medicine temperature discrimination step 302 for discriminating and the detection temperature in the medicine temperature discrimination step 302 is lower than the upper limit of the medicine temperature, a weak operation is performed. Predetermined time determination steps 308 and 309 for strong driving, and when the strong driving cycle is less than the number of strong driving cycles memorized during the heavy driving and the weak driving during the current driving determination step 300 The automatic temperature control method of the refrigerator comprising a step (310) and (311) of carrying out heavy operation after clearing the number of strong driving cycles when the number of strong driving cycles is greater.