KR20030032334A - Method for defrost of direct cooling type refrigerator - Google Patents

Method for defrost of direct cooling type refrigerator Download PDF

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Publication number
KR20030032334A
KR20030032334A KR1020010064063A KR20010064063A KR20030032334A KR 20030032334 A KR20030032334 A KR 20030032334A KR 1020010064063 A KR1020010064063 A KR 1020010064063A KR 20010064063 A KR20010064063 A KR 20010064063A KR 20030032334 A KR20030032334 A KR 20030032334A
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KR
South Korea
Prior art keywords
refrigerant
evaporator
defrosting
defrost
freezing
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KR1020010064063A
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Korean (ko)
Inventor
김양규
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엘지전자 주식회사
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Priority to KR1020010064063A priority Critical patent/KR20030032334A/en
Publication of KR20030032334A publication Critical patent/KR20030032334A/en

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B47/00Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
    • F25B47/006Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass for preventing frost
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B30/00Heat pumps
    • F25B30/02Heat pumps of the compression type
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00Fluid-circulation arrangements
    • F25B41/20Disposition of valves, e.g. of on-off valves or flow control valves
    • F25B41/26Disposition of valves, e.g. of on-off valves or flow control valves of fluid flow reversing valves
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00Fluid-circulation arrangements
    • F25B41/30Expansion means; Dispositions thereof
    • F25B41/31Expansion valves
    • F25B41/34Expansion valves with the valve member being actuated by electric means, e.g. by piezo-electric actuators
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2313/00Compression machines, plants or systems with reversible cycle not otherwise provided for
    • F25B2313/029Control issues
    • F25B2313/0294Control issues related to the outdoor fan, e.g. controlling speed
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

Abstract

PURPOSE: A method for defrosting a direct cooling type refrigerator is provided to make high temperature gas remove frost formed around an evaporator. CONSTITUTION: A method comprises the steps of: a first step determining whether time for defrosting has been reached while normal temperature liquefied refrigerant is introduced from a compressor to a condenser and circulates in an expansion valve, a freezer compartment evaporator and a refrigerator compartment evaporator; a second step controlling a three-way valve and introducing refrigerant to the freezer compartment evaporator through a defrosting channel tube to remove frost on the freezer compartment evaporator and the refrigerator compartment evaporator if time for defrosting has been reached; a third step controlling the three-way valve and introducing refrigerant to the condenser to execute normal refrigerating cycle if not.

Description

직냉식 냉장고의 제상방법{METHOD FOR DEFROST OF DIRECT COOLING TYPE REFRIGERATOR}Defrosting method of direct cooling refrigerator {METHOD FOR DEFROST OF DIRECT COOLING TYPE REFRIGERATOR}

본 발명은 직냉식 냉장고의 제상방법에 관한 것으로, 특히 냉동실과 냉장실에 증발기를 가지는 냉장고에 있어서, 팽창 장치로서 개도 조절이 가능한 전자밸브를 적용하여 냉동실 벽면의 서리를 제거할 수 있도록 한 직냉식 냉장고의 제상방법에 관한 것이다.The present invention relates to a defrosting method of a direct-cooling refrigerator, and in particular, in a refrigerator having an evaporator in a freezer compartment and a refrigerating compartment, a defrosting of a direct-cooling refrigerator to remove frost on the wall surface of the freezer compartment by applying a solenoid valve that can adjust an opening degree as an expansion device. It is about a method.

일반적으로 냉동사이클 장치는, 도 1에 도시한 바와 같이, 작동유체, 즉 냉매를 압축하여 고온 고압 상태로 변환시키는 압축기(10)와, 그 압축기(10)에서 압축된 고온 고압 상태의 냉매를 액상으로 변환시키면서 내부 잠열을 외부로 방출시키는 응축기(20)와, 상기 응축기(20)에서 액상으로 변환된 냉매의 압력을 저하시키는 팽창기구(30)와, 상기 팽창기구(30)에서 팽창된 액체 상태의 냉매를 기체로 증발시키면서 외부의 열을 흡수하는 증발기(40)를 포함하여 구성된다. 상기 응축기(20)와 증발기(40)는 외부와의 열교환을 이루게 되므로 열교환기라고도 한다.In general, a refrigeration cycle apparatus, as shown in Figure 1, the working fluid, that is, a compressor (10) for compressing and converting the refrigerant into a high temperature and high pressure state, and the refrigerant in the high temperature and high pressure state compressed by the compressor 10 in a liquid phase Condenser 20 for releasing internal latent heat to the outside while converting to the outside, an expansion mechanism 30 for lowering the pressure of the refrigerant converted into a liquid phase from the condenser 20, and a liquid state expanded from the expansion mechanism 30 It comprises a evaporator 40 for absorbing the heat of the outside while evaporating the refrigerant of the gas. The condenser 20 and the evaporator 40 is also called a heat exchanger because the heat exchange with the outside.

이와 같은 냉동사이클 장치의 압축기(10)는 저온, 저압의 기체 냉매를 흡입하여 고온, 고압으로 압축하게 되고, 그 고온, 고압의 기체는 응축기(20)로 들어가 냉각수 또는 공기에 의해 열교환되어 상온 고압의 액체 상태의 냉매가 된다.The compressor 10 of the refrigerating cycle apparatus sucks gas refrigerant of low temperature and low pressure and compresses the gas refrigerant at high temperature and high pressure. The gas of high temperature and high pressure enters the condenser 20 and is heat-exchanged by cooling water or air to obtain room temperature and high pressure. It becomes the liquid refrigerant of the liquid state.

상기 상온 고압의 액체 상태의 냉매는 증발기(40)로 보내기 전에 미리 증발하기 쉬운 상태로까지 압력을 내리는 작용과 액체의 냉매의 유량을 제어하는 모세관을 거쳐 저온 저압의 액체 상태의 냉매가 된다.The liquid refrigerant at room temperature and high pressure becomes a liquid refrigerant at low temperature and low pressure through a capillary for controlling the flow rate of the refrigerant and the action of lowering the pressure to a state which is easy to evaporate before being sent to the evaporator 40 in advance.

상기 저온 저압의 액체 상태의 냉매는 상기 증발기(40)에 의해 열을 흡수한다. 이에 의해 열을 빼앗긴 공기는 냉각되어 자연 대류 또는 팬에 의해서 순환하여 실내나 냉장고 속을 저온으로 유지한다.The low temperature low pressure liquid refrigerant absorbs heat by the evaporator 40. As a result, the deprived air is cooled and circulated by natural convection or a fan to keep the room or the inside of the refrigerator at a low temperature.

그러나, 상기와 같이 동작하는 종래 기술의 직냉식 냉장고는 최대 단점인 제상문제를 가지고 있어, 냉동실 벽면의 서리를 제거하기가 어려웠다.However, the conventional direct-cooling refrigerator operating as described above has a defrost problem which is the biggest disadvantage, and it is difficult to remove frost on the wall of the freezer compartment.

서리를 제거하기 위해서 Hydrocarbon계 냉매를 적용할 경우 폭발성 때문에 히터제상은 위험한 문제점이 있었다.In case of applying hydrocarbon-based refrigerant to remove frost, the defrost of heater is a dangerous problem.

또한, 사람이 직접 손으로 냉동실 벽면의 서리를 제거하기도 번거로운 문제점이 있었다.In addition, there is a problem that a person directly removes the frost on the freezer wall by hand.

따라서, 본 발명은 상기와 같은 문제점을 해결하기 위하여 창안한 것으로, 팽창장치로 전자팽창밸브를 적용하며 압축기출구와 팽창변 입구를 연결하는 제상 유로관을 설치하고 그 제상 유로관의 입구에 삼방밸브를 설치하여 제상운전시 삼방변의 유로 방향을 제상 유로관 라인으로 위치시켜 압축기 출구단의 고온의 가스가 지나도록 한다.Accordingly, the present invention has been made to solve the above problems, applying an electromagnetic expansion valve as an expansion device, and install a defrost flow path pipe connecting the compressor outlet and the expansion valve inlet and the three-way valve at the inlet of the defrost flow pipe In the defrosting operation, the three-way flow path is positioned in the defrost flow pipe line so that the hot gas at the outlet of the compressor passes.

이에 의해, 상기 고온의 가스는 전자팽창변을 지나 냉동, 냉장용 증발기를 순차적으로 지나면서 증발기 주위에 붙어있는 서리를 제거할 수 있도록 한 직냉식 냉장고의 제상방법을 제공함에 그 목적이 있다.It is an object of the present invention to provide a method of defrosting a direct-cooling refrigerator to remove frost stuck around an evaporator while sequentially passing the evaporator for freezing and refrigeration after passing the electronic expansion valve.

도 1은 종래 직냉식 냉장고의 냉동 사이클을 보인 예시도.1 is an exemplary view showing a refrigeration cycle of a conventional direct cooling refrigerator.

도 2는 본 발명 직냉식 냉장고의 냉동 사이클을 보인 예시도.Figure 2 is an exemplary view showing a refrigeration cycle of the present invention direct-cooling refrigerator.

도 3은 본 발명 직냉식 냉장고의 제상방법을 보인 흐름도.Figure 3 is a flow chart showing a defrosting method of the present invention direct-cooling refrigerator.

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

21: 압축기 22: 삼방밸브21: compressor 22: three-way valve

23: 응축기 24: 팽창밸브23: condenser 24: expansion valve

25: 냉동용 증발기 26: 냉장용 증발기25: refrigeration evaporator 26: refrigeration evaporator

상기와 같은 목적을 달성하기 위한 본 발명은, 냉동 및 냉장용 증발기를 구비한 직냉식 냉장고에 있어서, 압축기의 냉매를 응축기로 유입시켜 상온의 액체 상태의 냉매가 팽창밸브 및 냉동용,냉장용 증발기로 순환중 상기 직냉식 냉장고의 제상시점인가를 판단하는 제1 과정과; 상기 제상시점이면 삼방밸브를 제어하여 제상유로관을 통해 냉매를 냉동용 증발기측으로 유입시켜 냉동용, 냉장용 증발기의 서리를 제거하는 제2 과정과; 상기 판단결과 제상시점이 아니면 상기 삼방밸브를 제어하여 상기 응축기측으로 냉매를 유입시켜 상기 평상시 냉동사이클을 수행하는 제3 과정으로 이루어진 것을 특징으로 한다.In the present invention for achieving the above object, in the direct-cooling refrigerator having a freezer and refrigeration evaporator, the refrigerant of the compressor is introduced into the condenser so that the refrigerant in the liquid state at room temperature to the expansion valve and the freezing, refrigeration evaporator A first step of determining whether the defrosting point of the direct-cooling refrigerator is in circulation; A second process of controlling the three-way valve to introduce a refrigerant to the freezing evaporator through the defrost flow path to remove the frost of the freezing and refrigeration evaporators; If the determination result is not the point of defrosting, it is characterized in that the third step of performing the normal refrigeration cycle by controlling the three-way valve to flow the refrigerant to the condenser side.

이하, 본 발명에 따른 일실시예를 첨부한 도면을 참조하여 상세히 설명하면 다음과 같다.Hereinafter, an embodiment according to the present invention will be described in detail with reference to the accompanying drawings.

도 3은 본 발명 직냉식 냉장고의 제상방법을 보인 흐름도로서, 이에 도시된 바와 같이 냉동 및 냉장용 증발기를 구비한 직냉식 냉장고에 있어서, 압축기의 냉매를 응축기로 유입시켜 상온의 액체 상태의 냉매가 팽창밸브 및 냉동용,냉장용 증발기로 순환중 상기 직냉식 냉장고의 제상시점인가를 판단하는 제1 과정과; 상기 제상시점이면 삼방밸브를 제어하여 제상유로관을 통해 냉매를 냉동용 증발기측으로 유입시켜 냉동용, 냉장용 증발기의 서리를 제거하는 제2 과정과; 상기 판단결과 제상시점이 아니면 상기 삼방밸브를 제어하여 상기 응축기측으로 냉매를 유입시켜 상기 평상시 냉동사이클을 수행하는 제3 과정으로 이루어진 것으로, 이와 같이 구성된 본 발명의 동작을 설명하면 다음과 같다.3 is a flow chart illustrating a defrosting method of the direct-cooling refrigerator of the present invention. In the direct-cooling refrigerator having a freezing and refrigerating evaporator as shown in the drawing, the refrigerant of the compressor is introduced into the condenser to allow the liquid refrigerant at room temperature to expand the expansion valve. And a first process of determining whether the defrosting point of the direct-cooling refrigerator is in circulation during the circulation of the freezing and refrigeration evaporators. A second process of controlling the three-way valve to introduce a refrigerant to the freezing evaporator through the defrost flow path to remove the frost of the freezing and refrigeration evaporators; As a result of the determination, if the defrost point is not included, a third process of controlling the three-way valve to introduce the refrigerant into the condenser and performing the normal refrigeration cycle will be described.

먼저, 도 2는 본 발명 직냉식 냉장고의 냉동 사이클을 보인 예시도로서, 작동유체, 즉 냉매를 압축하여 고온 고압 상태로 변환시키는 압축기(21)와, 평상시 운전 또는 제상운전에 따라 압축기의 출력 유로를 제어하는 삼방밸브(22)와; 상기 삼방밸브(22)에 의해 평상시에는 상기 압축기(21)에서 압축된 고온 고압 상태의 냉매를 액상으로 변환시키면서 내부 잠열을 외부로 방출시키는 응축기(23)와, 상기 응축기(23)에서 액상으로 변환된 냉매의 압력 저하시키거나 또는 제상운전시 상기 압축기(21)의 고온 고압의 냉매 가스를 통하는 관을 팽창시키는 팽창밸브(24)와, 상기 팽창밸브(24)에서 팽창된 액체 상태의 냉매를 기체로 증발시키면서 외부의 열을 흡수하는 냉동용 증발기(25)와; 상기 냉동용 증발기(25)의 냉매를 입력받아 열교환을 작게하여 외부의 열을 흡수하는 냉장용 증발기(26)를 포함하여 구성된다.First, Figure 2 is an exemplary view showing a refrigerating cycle of the direct-cooling refrigerator of the present invention, the compressor 21 for compressing the working fluid, that is, the refrigerant to a high temperature and high pressure state, and the output flow path of the compressor according to the usual operation or defrost operation A three-way valve 22 for controlling; Normally by the three-way valve 22, the condenser 23 for releasing the internal latent heat to the outside while converting the refrigerant of the high temperature and high pressure state compressed by the compressor 21 to the liquid phase, and the condenser 23 is converted to the liquid phase The expansion valve 24 for expanding the pipe through the refrigerant gas of the high temperature and high pressure of the compressor 21 during the defrost operation or defrosting operation, and the refrigerant in the liquid state expanded from the expansion valve 24 A freezing evaporator 25 which absorbs external heat while evaporating to a temperature; It comprises a refrigeration evaporator 26 for receiving the refrigerant from the refrigeration evaporator 25 to reduce the heat exchange to absorb the external heat.

본 발명의 동작은 평상시 운전상태와 평상시 운전상태로 동작중 서리가 발생하게 되면 제상운전상태로 운전을 하게 된다.The operation of the present invention operates in the defrosting operation state when frost occurs during the operation in the normal operation state and the normal operation state.

평상시 냉동사이클은 다음과 같다. 압축기(21)는 냉장용 증발기(25)의 저온, 저압의 기체 냉매를 흡입하여 고온, 고압으로 압축하게 되고, 그 고온, 고압의 기체는 응축기(23)로 들어가 냉각수 또는 공기에 의해 열교환되어 상온 고압의 액체 상태의 냉매가 된다.Normal refrigeration cycle is as follows. The compressor 21 sucks the low-temperature, low-pressure gas refrigerant of the refrigerating evaporator 25 and compresses the gas refrigerant at high temperature and high pressure. The high-temperature, high pressure gas enters the condenser 23 and is heat-exchanged by cooling water or air to obtain room temperature. It becomes a high-pressure liquid refrigerant.

상기 상온 고압의 액체 상태의 냉매는 냉동용 증발기(25)로 보내기 전에 미리 증발하기 쉬운 상태로까지 압력을 내리는 작용과 액체의 냉매의 유량을 제어하는 팽창 밸브(24)를 통해 저온 저압의 액체 상태의 냉매가 된다.The liquid refrigerant at room temperature and high pressure is a liquid state of low temperature and low pressure through an expansion valve 24 for controlling the flow rate of the refrigerant and the action of lowering the pressure to a state which is easy to evaporate before being sent to the freezing evaporator 25. Becomes a refrigerant.

상기 저온 저압의 액체 상태의 냉매는 상기 냉동용 증발기(25)에 의해 열을 흡수한다. 이에 의해 열을 빼앗긴 공기는 냉각되어 자연 대류 또는 팬에 의해서 순환하여 냉동실을 저온으로 유지시킨다.The low temperature low pressure liquid refrigerant absorbs heat by the freezing evaporator 25. The deprived air is thereby cooled and circulated by natural convection or a fan to keep the freezer compartment at a low temperature.

또한, 냉장용 증발기(26)는 식품을 보관하기 적합한 냉장고의 온도를 유지하게 된다.In addition, the refrigeration evaporator 26 will maintain the temperature of the refrigerator suitable for storing food.

상기와 같은 구성으로 냉동사이클 운전을 수행하게 되면, 냉장용 증발기(26)는 상기 압축기의 온, 오프에 동작에 따라 오프시에 서리가 제거 되지만, 냉동용 증발기(25)는 서리가 제거되지 않는다.When the refrigeration cycle operation is performed in the above configuration, the refrigeration evaporator 26 is defrosted at the time of off according to the operation on or off of the compressor, but the refrigeration evaporator 25 is not removed. .

상기 서리를 제거하기 위해서 본 발명은 제상 사이클로 운전을 하게 된다.In order to remove the frost, the present invention operates in a defrost cycle.

즉, 상기 압축기(21)는 냉매를 압축하여 고온 고압 상태로 변환시키고, 삼방밸브(22)에 의해 응축기(23)로 열려있는 유로를 차단하고, 제상유로관으로 유로 라인을 설정함으로써, 팽창밸브(24)측으로 그 고온 고압의 냉매 가스를 보내고, 그 고온 고압의 냉매 가스는 상기 팽창밸브(24)를 통해 상기 냉동용 증발기(25)의 서리를 제거하게 된다.That is, the compressor 21 compresses the refrigerant and converts the refrigerant into a high temperature and high pressure state, blocks the flow path opened by the three-way valve 22 to the condenser 23, and sets the flow path line as the defrost flow path pipe, thereby expanding the expansion valve. The refrigerant gas at the high temperature and high pressure is sent to the (24) side, and the refrigerant gas at the high temperature and high pressure removes the frost of the freezing evaporator 25 through the expansion valve 24.

따라서, 본 발명은 제상운전시 삼방밸브의 밸브를 제어하여 유로방향을 제상유로관 라인으로 하여 압축기의 고온 고압의 냉매 가스를 팽창밸브측으로 보내게 됨으로써, 냉동용 증발기의 서리를 제거할 수 있다.Therefore, the present invention controls the valve of the three-way valve during the defrosting operation to send the refrigerant gas of the high temperature and high pressure of the compressor to the expansion valve side by using the flow path direction as the defrost flow passage line, thereby eliminating the frost of the freezing evaporator.

이상에서 상세히 설명한 바와 같이 본 발명은 전자 팽창 밸브를 적용하여 압축기출구와 팽창밸브 입구를 연결하는 제상유로 라인을 설치하고, 그 제상유로 라인의 입구에 삼방밸브를 설치하여 제상 운전시 삼방변의 유로 방향을 상기 제상유로 라인으로 위치시켜 압축기출구단의 고온의 가스가 지나가도록 한다.As described in detail above, the present invention provides a defrost flow passage line connecting the compressor outlet and the expansion valve inlet by applying an electromagnetic expansion valve, and installs a three-way valve at the inlet of the defrost flow passage line, so that the three-way flow path in the defrost operation Is positioned in the defrost flow passage line to allow the hot gas at the compressor outlet to pass.

이에 의해, 직냉식 냉장고의 최대 단점인 제상문제를 해결함과 동시에 HYDROCARBON계 냉매 적용에 따른 폭발성 위험을 없애고, 사람이 직접 손으로 냉동실 벽면의 서리를 제거해야 하는 번거로움을 없애는 효과가 있다.This solves the defrost problem, which is the biggest disadvantage of the direct-cooling refrigerator, and at the same time, eliminates the explosive risk caused by the application of the HYDROCARBON-based refrigerant, and has the effect of eliminating the inconvenience of having to remove the frost on the freezer wall by hand.

Claims (2)

냉동 및 냉장용 증발기를 구비한 직냉식 냉장고에 있어서, 압축기의 냉매를 응축기로 유입시켜 상온의 액체 상태의 냉매가 팽창밸브 및 냉동용,냉장용 증발기로 순환중 상기 직냉식 냉장고의 제상시점인가를 판단하는 제1 과정과; 상기 제상시점이면 삼방밸브를 제어하여 제상유로관을 통해 냉매를 냉동용 증발기측으로 유입시켜 냉동용, 냉장용 증발기의 서리를 제거하는 제2 과정과; 상기 판단결과 제상시점이 아니면 상기 삼방밸브를 제어하여 상기 응축기측으로 냉매를 유입시켜 상기 평상시 냉동사이클을 수행하는 제3 과정으로 이루어진 것을 특징으로 하는 직냉식 냉장고의 제상방법.In a direct-cooling refrigerator having a freezing and refrigerating evaporator, the refrigerant of the compressor is introduced into the condenser to determine whether the liquid refrigerant at room temperature is defrosting time of the direct-cooling refrigerator during circulation to the expansion valve and the freezing and refrigerating evaporator. A first process; A second process of controlling the three-way valve to introduce a refrigerant to the freezing evaporator through the defrost flow path to remove the frost of the freezing and refrigeration evaporators; The defrosting method of the direct-cooling refrigerator, characterized in that the third step of performing the normal refrigeration cycle by introducing the refrigerant to the condenser side by controlling the three-way valve if the defrost point is not determined. 제 1항에 있어서, 상기 제2 과정은 팽창밸브를 전개(全開)하여 다량의 고온, 고압 기체상태의 냉매가 증발기로 유입되도록 하는 단계를 더 포함하여 수행하는 것을 특징으로 하는 직냉식 냉장고의 제상방법.The method of claim 1, wherein the second process further comprises the step of expanding the expansion valve so that a large amount of high-temperature, high-pressure gaseous refrigerant flows into the evaporator. .
KR1020010064063A 2001-10-17 2001-10-17 Method for defrost of direct cooling type refrigerator KR20030032334A (en)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60182661U (en) * 1984-05-15 1985-12-04
JPS62169969A (en) * 1986-01-23 1987-07-27 Daikin Ind Ltd Refrigerator
JPH01159564A (en) * 1987-12-16 1989-06-22 Sanyo Electric Co Ltd Refrigerator
JPH0278873A (en) * 1988-09-13 1990-03-19 Daikin Ind Ltd Defrost operation controller for refrigerating device
KR920020172A (en) * 1991-04-15 1992-11-20 이헌조 Refrigerator Refrigeration Cycle Defroster
JPH09178329A (en) * 1995-12-28 1997-07-11 Sharp Corp Freezer-refrigerator

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60182661U (en) * 1984-05-15 1985-12-04
JPS62169969A (en) * 1986-01-23 1987-07-27 Daikin Ind Ltd Refrigerator
JPH01159564A (en) * 1987-12-16 1989-06-22 Sanyo Electric Co Ltd Refrigerator
JPH0278873A (en) * 1988-09-13 1990-03-19 Daikin Ind Ltd Defrost operation controller for refrigerating device
KR920020172A (en) * 1991-04-15 1992-11-20 이헌조 Refrigerator Refrigeration Cycle Defroster
JPH09178329A (en) * 1995-12-28 1997-07-11 Sharp Corp Freezer-refrigerator

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