KR20020021914A - Defrost apparatus for refrigerator - Google Patents

Defrost apparatus for refrigerator Download PDF

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Publication number
KR20020021914A
KR20020021914A KR1020000054652A KR20000054652A KR20020021914A KR 20020021914 A KR20020021914 A KR 20020021914A KR 1020000054652 A KR1020000054652 A KR 1020000054652A KR 20000054652 A KR20000054652 A KR 20000054652A KR 20020021914 A KR20020021914 A KR 20020021914A
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KR
South Korea
Prior art keywords
air
evaporator
cooling chamber
defrost
refrigerator
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Application number
KR1020000054652A
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Korean (ko)
Inventor
정성해
신종민
김철환
Original Assignee
구자홍
엘지전자주식회사
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Application filed by 구자홍, 엘지전자주식회사 filed Critical 구자홍
Priority to KR1020000054652A priority Critical patent/KR20020021914A/en
Publication of KR20020021914A publication Critical patent/KR20020021914A/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
    • F25DREFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D21/00Defrosting; Preventing frosting; Removing condensed or defrost water
    • F25D21/06Removing frost
    • F25D21/08Removing frost by electric heating
    • 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
    • F25DREFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D17/00Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces
    • F25D17/04Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection
    • F25D17/06Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection by forced circulation
    • F25D17/067Evaporator fan units
    • 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
    • F25DREFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D2317/00Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass
    • F25D2317/06Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass with forced air circulation
    • F25D2317/063Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass with forced air circulation with air guides

Abstract

PURPOSE: A defrost apparatus for refrigerator is provided to reduce power consumption by allowing the heat generated from the defrost heater to be transferred to the evaporator in a rapid manner, thus minimizing the time taken for defrost operation. CONSTITUTION: A defrost apparatus comprises an evaporator(1) mounted within a cooling chamber, and which cools the hot air introduced through a cooling air return channel(RF) of a freezing compartment(F) and a refrigerating compartment(R); a blower fan(2) mounted in the cooling chamber, and which discharges air to the freezing compartment and refrigerating compartment and sucks air through the cooling air return channel such that the air being sucked passes through the evaporator; a defrost heater(3) mounted in the cooling chamber, and which generates heat to remove the frost formed at the surface of the evaporator during defrost operation; dampers(6,10) mounted to the discharge part of the cooling chamber, and which shut off the discharge part during defrost operation; and a control unit electrically connected to dampers, and which opens dampers and operates the blower fan during normal operation so as to allow air to be smoothly circulated in the refrigerator, and closes dampers and operates the blower fan during defrost operation so as to allow air to be forcibly circulated in the cooling chamber.

Description

냉장고의 제상장치{DEFROST APPARATUS FOR REFRIGERATOR}Defroster of refrigerator {DEFROST APPARATUS FOR REFRIGERATOR}
본 발명은 냉장고의 제상장치에 관한 것으로, 특히 제상운전시 냉각실을 고내와 차단하여 제상시간을 감축한 냉장고의 제상장치에 관한 것이다.The present invention relates to a defrosting apparatus of a refrigerator, and more particularly, to a defrosting apparatus of a refrigerator which reduces the defrosting time by blocking the cooling chamber from inside the refrigerator during defrosting operation.
일반적으로 냉장고는 냉각운전시 고내로부터 냉각실로 반입되는 공기중의 수분이 증발기 표면에 착상되어 열교환 성능을 저하시키거나 공기의 유통을 방해하게 되므로 일정 시간 동안 냉각운전을 실시한 이후에는 반드시 얼마간의 제상운전을 실시하여 상기 증발기에 형성된 서리를 제거함으로써 냉장고의 효율을 향상시키도록 제어되고 있다.In general, refrigerators have some defrosting operation after cooling for a certain period of time since moisture in the air brought into the cooling chamber from the inside of the refrigerator may land on the evaporator and degrade heat exchange performance or impede the flow of air. It is controlled to improve the efficiency of the refrigerator by removing the frost formed in the evaporator.
도 1은 종래 냉장고를 개략적으로 보인 종단면도이고, 도 2는 종래 냉장고의 제상과정을 보인 개략도이다.1 is a vertical cross-sectional view schematically showing a conventional refrigerator, Figure 2 is a schematic view showing a defrost process of a conventional refrigerator.
이에 도시된 바와 같이 종래의 냉장고는, 그 후벽부에 냉동실(F) 및 냉장실(R)의 냉기귀환유로(RF)와 연통되는 냉각실(A)이 형성되어 있고, 그 냉각실(A)에는 각 실(F,R)의 냉기귀환유로(RF)를 통해 반입되는 더운 공기를 통과시켜 찬 공기로 만드는 증발기(1) 및 그 증발기(1)로 냉기를 유도하여 차가워진 공기를 다시 냉동실(F) 및 냉장실(R)로 토출시키는 송풍팬(2)이 구비되어 있으며, 상기 증발기(1)의 하단에는 그 증발기(1)에 착상된 서리를 제거하기 위한 제상히터(3)가 장착되어 이루어져 있다.As shown in the drawing, in the conventional refrigerator, a cooling chamber A communicating with the cold air return path RF of the freezing chamber F and the refrigerating chamber R is formed in the rear wall thereof, and the cooling chamber A is provided in the cooling chamber A. The evaporator 1 makes hot air through the hot air return path RF of each chamber F and R, and the cold air is introduced to the evaporator 1 to cool the air again. ) And a blowing fan 2 for discharging to the refrigerating chamber R, and a defrost heater 3 for removing frost formed on the evaporator 1 is mounted at the lower end of the evaporator 1. .
상기 냉각실(A)과 냉동실(F)의 사이에는 두 공간을 구획하는 가이드판(슈라우드판 및 그릴판)(4)이 개재되어 있고, 그 가이드판(4)에는 항상 열려 있어 냉각실(A)의 냉기를 냉동실(F)로 유도하는 냉동실측 공기토출구(4a)가 형성되어 있다.A guide plate (shroud plate and grill plate) 4 is provided between the cooling chamber A and the freezing chamber F to divide the two spaces, and the guide plate 4 is always open and the cooling chamber A The freezer compartment side air discharge port 4a which guides cold air of ()) to the freezer compartment F is formed.
상기 냉각실(A)과 냉장실(R)의 사이에는 송풍팬(2)에 의해 토출되는 냉기의 일부를 냉장실(R)로 유도하는 멀티덕트(5)가 장착되어 있고, 그 멀티덕트(5)의 도입측에는 냉동실 집중냉각 운전을 실시하거나 상술한 제상운전시 냉각실(A)과 냉장실(R)을 차단하도록 개폐되는 냉장실용 댐퍼(6)가 장착되어 있다.Between the cooling chamber A and the refrigerating chamber R, a multi duct 5 for guiding a part of the cold air discharged by the blowing fan 2 to the refrigerating chamber R is mounted, and the multi duct 5 is provided. The introduction side of the refrigerator compartment damper (6) is opened and closed to perform the freezer compartment concentrated cooling operation or to block the cooling chamber (A) and the refrigerating chamber (R) during the defrosting operation described above.
도면중 미설명 부호인 D는 냉동실용 도어 및 냉장실용 도어이다.In the drawings, reference numeral D denotes a door for a freezer compartment and a door for a refrigerator compartment.
상기와 같은 종래 냉장고에서 제상운전을 실시하는 과정은 다음과 같다.The process of performing the defrosting operation in the conventional refrigerator as described above is as follows.
즉, 상기 송풍팬(2)이 작동하게 되면 냉동실(F) 및 냉장실(R)의 더운 공기가 각 실의 냉기귀환유로(RF)를 통해 냉각실(A)로 흡입되었다가 그 냉각실(A)의 증발기(2)를 통과하면서 찬 공기로 변화되어 다시 냉동실(F) 및 냉장실(R)로 토출되고, 이후 각 실(F,R)로 공급되는 공기는 고내에 수납되어 있던 식품들로부터 수분을 흡수하면서 다시 냉각실(A)로 반입되었다가 재토출되는 일련의 과정을 반복하게 되는데, 이 과정에서 냉각실(A)로 반입되는 공기중의 수분은 증발기(1)를 통과하면서 그 증발기(1)의 표면에 서리를 반복 착상시키게 된다.That is, when the blower fan 2 is operated, hot air of the freezing compartment F and the refrigerating compartment R is sucked into the cooling chamber A through the cold air return passage RF of each chamber, and then the cooling chamber A After passing through the evaporator (2) of the evaporator (2) to the cold air is discharged again to the freezer compartment (F) and the refrigerating chamber (R), the air supplied to each chamber (F, R) is then moistened from the food stored in the While absorbing the water, the water is returned to the cooling chamber (A) and is discharged again. In this process, the moisture in the air introduced into the cooling chamber (A) passes through the evaporator (1) and the evaporator ( Frost on the surface of 1) is repeatedly implanted.
이때, 상기 제상히터(3)가 작동하여 증발기(1)의 표면에 착상된 서리를 녹여 제거하는 제상운전을 실시하게 되는데, 이러한 제상운전은 먼저 상기 송풍팬(2)이 정지되어 고내의 공기가 냉각실(A)로 흡입되는 것을 차단함과 동시에 상기한 제상히터(3)가 작동하여 그 복사열 또는 전도열로 증발기(1) 표면에 착상된 서리를 제상시키는 것이었다.At this time, the defrost heater (3) is operated to perform a defrost operation to melt and remove the frost formed on the surface of the evaporator (1), the defrosting operation is the blow fan (2) first stop the air in the The defrost heater 3 was operated at the same time as the suction to the cooling chamber A and the defrost heater 3 was operated to defrost frost formed on the surface of the evaporator 1 by its radiant or conductive heat.
그러나, 상기와 같은 종래 냉장고의 제상장치에 있어서는, 상기 증발기(1)에 착상되는 서리가 제상히터(3)로부터 발생되는 복사열이나 전도열에 의해서만 제거되도록 이루어져 있으나, 이는 상기 제상히터(3)로부터 발생되는 복사열이나 전도열이 증발기(1) 전체에 전달되는 속도가 늦어져 제상시간이 길게 소요됨에 따라 냉장고의 본래 기능과는 관계없는 제상에 필요한 전력소비량이 증가하게 되는 문제점이 있었다.However, in the defrosting apparatus of the conventional refrigerator as described above, the frost formed on the evaporator 1 is removed only by radiant heat or conductive heat generated from the defrost heater 3, which is generated from the defrost heater 3. There is a problem in that the power consumption required for defrost irrelevant to the original function of the refrigerator increases as the radiant heat or conduction heat is transmitted to the entire evaporator 1 and the defrost time is long.
본 발명은 상기와 같은 종래 냉장고의 제상장치가 가지는 문제점을 감안하여 안출한 것으로, 제상운전시 제상히터로부터 발생되는 열이 증발기 전체에 빠르게 전달되도록 하여 제상운전에 소요되는 시간을 최소화함으로써 전력소비량을 저감시킬 수 있는 냉장고의 제상장치를 제공하려는데 그 목적이 있다.The present invention has been made in view of the problems of the defrosting apparatus of the conventional refrigerator as described above, and the power consumption is reduced by minimizing the time required for defrosting operation so that the heat generated from the defrost heater during the defrosting operation is quickly transferred to the entire evaporator. It is an object of the present invention to provide a defroster of a refrigerator that can be reduced.
도 1은 종래 냉장고를 개략적으로 보인 종단면도.1 is a longitudinal sectional view schematically showing a conventional refrigerator.
도 2는 종래 냉장고의 제상과정을 보인 개략도.2 is a schematic view showing a defrosting process of a conventional refrigerator.
도 3은 본 발명 냉장고의 제상장치를 설명하기 위해 일부를 개략적으로 보인 종단면도.Figure 3 is a longitudinal sectional view schematically showing a part to explain the defrosting device of the refrigerator of the present invention.
도 4a 및 도 4b는 본 발명 냉장고의 제상장치에서 정상운전시와 제상운전시에 따른 각각의 동작상태를 보인 개략도.Figures 4a and 4b is a schematic view showing each operation state according to the normal operation and the defrosting operation in the defrosting apparatus of the present invention refrigerator.
** 도면의 주요 부분에 대한 부호의 설명 **** Description of symbols for the main parts of the drawing **
1 : 증발기 2 : 송풍팬1: evaporator 2: blower fan
3 : 제상히터 4A : 슈라우드판3: defrost heater 4A: shroud board
4a : 공기통구 5 : 멀티덕트4a: air vent 5: multi duct
6 : 냉장실측 댐퍼 10 : 냉동실측 댐퍼6: cold room side damper 10: freezer side damper
F : 냉동실 R : 냉장실F: Freezer R: Refrigerator
RF : 냉기귀환유로RF: Cold Return Euro
본 발명의 목적을 달성하기 위하여, 냉동실 냉기귀환유로 및 냉장실 냉기귀환유로의 각 도출단에 도입부가 연통되는 동시에 상기 냉동실측 공긴토출구 및 냉장실측 공기토출구에 도출부가 일괄 연통되도록 밀폐공간을 이루는 냉각실의 내부에 장착되어 상기한 각각의 냉기귀환유로를 통해 반입되는 더운 공기를 냉각시키는 증발기와,In order to achieve the object of the present invention, the inlet is communicated to each of the leading end of the freezer cold air return flow path and the refrigerating compartment cold air return flow path, and at the same time, the cooling chamber forming a sealed space so that the lead-out part is connected to the freezer compartment air outlet port and the refrigerating compartment air outlet port collectively. An evaporator mounted inside the cooler to cool hot air introduced through each of the cold air return passages;
상기 냉각실에 장착되어 공기를 냉동실 및 냉장실로 토출하였다가 각각의 냉기귀환유로를 통해 다시 흡입시키면서 그 반입되는 공기가 증발기를 통과하도록 유도하는 송풍팬과,A blowing fan mounted in the cooling chamber and discharging air to the freezing chamber and the refrigerating chamber and sucking the air back through each of the cold air return passages to guide the introduced air through the evaporator;
상기 냉각실에 장착되어 제상운전시 증발기 표면에 착상된 서리를 제거하도록 열을 발생시키는 제상히터와,A defrost heater mounted on the cooling chamber and generating heat to remove frost formed on the surface of the evaporator during defrosting operation;
상기 냉각실의 도출부에 장착되어 제상운전시 그 도출부를 차단하는 댐퍼와,A damper mounted to the derivation part of the cooling chamber and blocking the derivation part during defrosting operation;
상기 댐퍼에 전기적으로 연결되어 정상운전시에는 그 댐퍼를 여는 동시에 송풍팬을 작동시켜 고내의 공기가 원활하게 유동되도록 하는 반면 제상운전시에는 상기한 댐퍼를 닫는 동시에 송풍팬을 작동시켜 냉각실내에서 공기가 강제 순환되도록 함으로써 강제대류에 의한 열전달이 발생되도록 제어하는 제어부를 포함한 냉장고의 제상장치가 제공된다.The damper is electrically connected to the damper to open the damper and operate the blower fan during normal operation so that the air in the refrigerator flows smoothly while the defrosting operation closes the damper and operates the blower fan to operate the air in the cooling chamber. Provided is a defrosting apparatus of a refrigerator including a control unit for controlling forced circulation to generate heat transfer by forced convection.
이하, 본 발명에 의한 냉장고의 제상장치를 첨부도면에 도시된 일실시예에 의거하여 상세하게 설명한다.Hereinafter, the defrosting apparatus of the refrigerator according to the present invention will be described in detail based on the embodiment shown in the accompanying drawings.
도 3은 본 발명 냉장고의 제상장치를 설명하기 위해 일부를 개략적으로 보인 종단면도이다.Figure 3 is a longitudinal sectional view schematically showing a part to explain the defrosting apparatus of the present invention refrigerator.
이에 도시된 바와 같이 본 발명에 의한 제상장치가 구비된 냉장고는 그 후벽부에 냉동실(F) 및 냉장실(R)의 냉기귀환유로(RF)와 연통되는 냉각실(A)이 형성되고, 그 냉각실(A)에는 각 실의 냉기귀환유로(RF)를 통해 반입되는 더운 공기를 통과시켜 찬 공기로 만드는 증발기(1) 및 그 증발기(1)로 냉기를 유도하여 차가워진 공기를 다시 냉동실(F) 및 냉장실(R)로 토출시키는 송풍팬(2)이 구비되며, 상기 증발기(1)의 하단에는 그 증발기(1)에 착상된 서리를 제거하기 위한 제상히터(3)가 장착되어 구성된다.As shown in the drawing, the refrigerator equipped with the defrosting apparatus according to the present invention has a cooling chamber A communicating with the cold air return passage RF of the freezing chamber F and the refrigerating chamber R at a rear wall thereof, and cooling the refrigerator. In the chamber (A), the evaporator (1) which makes hot air through the hot air return path (RF) of each thread, becomes cold air, and induces cold air to the evaporator (1) to return the cold air to the freezer compartment (F). And a blowing fan 2 for discharging to the refrigerating chamber R, and a defrost heater 3 for removing frost formed on the evaporator 1 is mounted at the lower end of the evaporator 1.
상기 냉각실(F)과 냉동실(R)의 사이에는 두 공간을 구획하도록슈라우드판(4A)과 그릴판(4B)이 소정간격을 두고 이루어진 가이드판(4)이 개재되며, 상기 슈라우드판(4A)에는 상기한 송풍팬(2)으로부터 토출되는 공기를 통과시키는 공기통구(4a)가 형성되고, 상기 그릴판(4B)에는 슈라우드판(4A)의 공기통구(4a)를 통과한 냉기중 일부를 냉동실(F)측으로 유도하는 냉동실측 공기토출구(4b)가 형성되며, 상기 슈라우드판(4A)의 공기통구(4a)에는 제상운전시 그 공기통구(4a)를 차단하는 냉동실용 댐퍼(10)가 장착된다.The shroud plate 4A and the grill plate 4B are interposed between the cooling chamber F and the freezing chamber R so as to partition the two spaces, and the shroud plate 4A is provided. Is formed in the air vent (4a) for passing the air discharged from the blowing fan (2), the grill plate 4B is a part of the cold air passing through the air vent (4a) of the shroud plate (4A). A freezer compartment air discharge port 4b leading to the freezer compartment F side is formed, and a freezer damper 10 is provided at the air vent 4a of the shroud plate 4A to block the air vent 4a during defrosting operation. Is mounted.
상기 냉장실(R)측 후벽부에는 냉각실(A)로부터 토출되는 찬 공기를 냉장실(R)로 유도하는 멀티덕트(5)가 슈라우드판(4A)과 그릴판(4B) 사이의 공기유로와 연통되도록 장착되고, 상기 멀티덕트(5)의 도입측에는 찬 공기가 냉장실(R)로 유입되는 것을 조절하도록 냉장실용 덕트(6)가 장착된다.On the rear wall side of the refrigerating chamber R, a multi duct 5 for directing cold air discharged from the cooling chamber A to the refrigerating chamber R communicates with an air flow path between the shroud plate 4A and the grill plate 4B. It is mounted so as to, and the introduction side of the multi-duct (5) is equipped with a refrigerating chamber duct (6) to control the cold air flow into the refrigerating chamber (R).
상기 제상히터(3)는 본 실시예에서와 같이 증발기(1)의 하단에 설치되어 주로 복사열을 전달하는 비접촉식 히터가 통상적으로 적용되나 상기 증발기(1)에 접촉되어 주로 전도열을 전달하는 접촉식 히터도 사용될 수 있다.The defrost heater 3 is installed at the bottom of the evaporator 1 as in the present embodiment, but a non-contact heater that mainly transmits radiant heat is generally applied, but a contact heater that mainly contacts the evaporator 1 and transmits conductive heat. May also be used.
도면중 종래와 동일한 부분에 대하여는 동일한 부호를 부여하였다.In the drawings, the same reference numerals are given to the same parts as in the prior art.
도면중 미설명 부호인 D는 냉동실용 도어 및 냉장실용 도어이다.In the drawings, reference numeral D denotes a door for a freezer compartment and a door for a refrigerator compartment.
상기와 같은 본 발명에 의한 제상장치가 구비된 냉장고의 동작은 다음과 같다.Operation of the refrigerator equipped with a defrosting device according to the present invention as described above is as follows.
즉, 상기 송풍팬(2)이 작동하게 되면 냉동실(F) 및 냉장실(R)의 더운 공기가 각 실의 냉기귀환유로(RF)를 통해 냉각실(A)로 흡입되었다가 그 냉각실(A)의 증발기(1)를 통과하면서 찬 공기로 변화되어 다시 냉동실(F) 및 냉장실(R)로 토출되고,이후 각 실(F,R)로 공급되는 공기는 고내에 수납되어 있던 식품들로부터 수분을 흡수하면서 다시 냉각실(A)로 반입되었다가 재토출되는 일련의 과정을 반복하게 되는데, 이 과정에서 냉각실(A)로 반입되는 공기중의 수분은 증발기(1)를 통과하면서 그 증발기(1)의 표면에 서리를 반복 착상시켜 공기의 유통을 방해하게 되므로 일정한 주기 또는 착상량의 정도에 따라 제상운전을 실시하게 된다.That is, when the blower fan 2 is operated, hot air of the freezing compartment F and the refrigerating compartment R is sucked into the cooling chamber A through the cold air return passage RF of each chamber, and then the cooling chamber A After passing through the evaporator 1 of the evaporator 1, the air is changed into cold air and discharged again into the freezing chamber F and the refrigerating chamber R, and the air supplied to each chamber F and R is then moistened from foods stored in the refrigerator. While absorbing the water, the water is returned to the cooling chamber (A) and is discharged again. In this process, the moisture in the air introduced into the cooling chamber (A) passes through the evaporator (1) and the evaporator ( Since the frost on the surface of 1) is repeatedly disturbed to prevent the flow of air, the defrosting operation is carried out according to a certain period or degree of implantation.
이러한 제상운전을 보다 상세히 살펴보면, 도 4a에 도시된 바와 같이 먼저 상기 냉동실측 댐퍼(10)와 냉장실측 댐퍼(6)가 마이콤(미도시)에 의해 함께 닫혀 냉각실(A)을 냉동실(F) 및 냉장실(R)과 차단함과 동시에 상기 제상히터(3)를 작동시켜 열을 발생시키게 되고, 이후 상기 송풍팬(2)이 작동하여 각 실(F,R)의 냉기귀환유로(RF)를 통해 냉각실(A)로 유입되는 공기를 증발기(1)의 도입단에서 도출단까지 빠르게 순환시키게 된다.Looking at the defrosting operation in more detail, as shown in FIG. 4A, the freezer compartment side damper 10 and the refrigerator compartment side damper 6 are closed together by a microcomputer (not shown) to close the cooling compartment A and the freezer compartment F. And while blocking the refrigerating chamber (R) and at the same time to operate the defrost heater (3) to generate heat, and then the blowing fan (2) to operate the cold air return flow path (RF) of each chamber (F, R) Through the air flowing into the cooling chamber (A) through the introduction end of the evaporator (1) is quickly circulated.
이때, 상기 냉각실(A) 내에서 순환하는 공기는 제상히터(3)로부터 열을 전달받아 증발기(1)에 강제 전달하는 소위 강제대류에 의한 대류 열전달이 발생되어 기존의 비접촉식 히터의 경우에는 복사 열전달 뿐만이 아니라 대류 열전달이 부가되면서 증발기(1)의 제상시간이 단축되는 반면, 접촉식 히터의 경우에는 전도에 의한 열전달 뿐만이 아니라 대류에 의한 열전달이 부가되어 역시 증발기(1)의 제상시간이 단축되게 된다.At this time, the air circulating in the cooling chamber A receives heat from the defrost heater 3 and convective heat transfer is generated by so-called forced convection, which is forcibly transferred to the evaporator 1. While not only heat transfer but convection heat transfer is added, the defrosting time of the evaporator 1 is shortened, whereas in the case of a contact heater, not only heat transfer by conduction but also heat transfer by convection is added so that the defrosting time of the evaporator 1 is also shortened. do.
다음, 이와 같은 제상운전이 끝나 증발기(1)의 표면에 착상된 서리층이 제거된 후에는 마이콤에 의해 상기한 제상히터(3)가 정지되는 동시에 냉동실측 댐퍼(10) 및 냉장실측 댐퍼(6)가 함께 열리면서 정상적인 냉각운전이 재개되는 것이다.Next, after the defrosting operation is completed and the frost layer formed on the surface of the evaporator 1 is removed, the defrost heater 3 is stopped by the microcomputer and the freezer compartment side damper 10 and the refrigerator compartment side damper 6 are stopped. ) Will open together and normal cooling operation will resume.
본 발명에 의한 냉장고의 제상장치는, 냉동실 및 냉장실에 일괄 연통되는 냉각실의 도출부에 제상운전시 닫히는 댐퍼를 장착함과 아울러 이러한 제상운전중에도 송풍팬을 작동시켜 냉각실내에서 공기가 강제 순환되면서 강제대류에 의한 열전달이 발생되도록 함으로써, 제상운전시 제상히터로부터 발생되는 열이 증발기 전체에 빠르게 전달되도록 하여 제상운전에 소요되는 시간을 최소화함으로써 전력소비량을 저감시킬 수 있다.The defrosting apparatus of the refrigerator according to the present invention is equipped with a damper which is closed during defrosting operation at the derivation part of the cooling chamber connected to the freezer compartment and the refrigerating compartment, and operates a blower fan during such defrosting operation, thereby forcibly circulating air in the cooling compartment. By allowing heat transfer by forced convection, heat generated from the defrost heater during the defrosting operation is quickly transmitted to the entire evaporator, thereby minimizing the time required for the defrosting operation, thereby reducing power consumption.

Claims (1)

  1. 냉동실 냉기귀환유로 및 냉장실 냉기귀환유로의 각 도출단에 도입부가 연통되는 동시에 상기 냉동실측 공긴토출구 및 냉장실측 공기토출구에 도출부가 일괄 연통되도록 밀폐공간을 이루는 냉각실의 내부에 장착되어 상기한 각각의 냉기귀환유로를 통해 반입되는 더운 공기를 냉각시키는 증발기와,Each inlet is communicated with each leading end of the freezer compartment cold return flow path and the refrigerating compartment cold air return flow path, and is mounted inside the cooling chamber forming a sealed space so that the outlet parts communicate with the freezer compartment air outlet port and the refrigerating compartment air outlet port. An evaporator for cooling hot air brought in through a cold return flow path,
    상기 냉각실에 장착되어 공기를 냉동실 및 냉장실로 토출하였다가 각각의 냉기귀환유로를 통해 다시 흡입시키면서 그 반입되는 공기가 증발기를 통과하도록 유도하는 송풍팬과,A blowing fan mounted in the cooling chamber and discharging air to the freezing chamber and the refrigerating chamber and sucking the air back through each of the cold air return passages to guide the introduced air through the evaporator;
    상기 냉각실에 장착되어 제상운전시 증발기 표면에 착상된 서리를 제거하도록 열을 발생시키는 제상히터와,A defrost heater mounted on the cooling chamber and generating heat to remove frost formed on the surface of the evaporator during defrosting operation;
    상기 냉각실의 도출부에 장착되어 제상운전시 그 도출부를 차단하는 댐퍼와,A damper mounted to the derivation part of the cooling chamber and blocking the derivation part during defrosting operation;
    상기 댐퍼에 전기적으로 연결되어 정상운전시에는 그 댐퍼를 여는 동시에 송풍팬을 작동시켜 고내의 공기가 원활하게 유동되도록 하는 반면 제상운전시에는 상기한 댐퍼를 닫는 동시에 송풍팬을 작동시켜 냉각실내에서 공기가 강제 순환되도록 함으로써 강제대류에 의한 열전달이 발생되도록 제어하는 제어부를 포함한 냉장고의 제상장치.The damper is electrically connected to the damper to open the damper and operate the blower fan during normal operation so that the air in the refrigerator flows smoothly while the defrosting operation closes the damper and operates the blower fan to operate the air in the cooling chamber. The defrosting apparatus of the refrigerator including a control unit for controlling the heat transfer by forced convection by forced circulation.
KR1020000054652A 2000-09-18 2000-09-18 Defrost apparatus for refrigerator KR20020021914A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20040035228A (en) * 2002-10-18 2004-04-29 김용찬 Defrosting method and device of refrigerators
KR100827870B1 (en) * 2006-09-06 2008-05-07 엘지전자 주식회사 Refrigerator and method of operating a refrigerator
KR20150045796A (en) * 2013-10-21 2015-04-29 엘지전자 주식회사 Refrigerator

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20040035228A (en) * 2002-10-18 2004-04-29 김용찬 Defrosting method and device of refrigerators
KR100827870B1 (en) * 2006-09-06 2008-05-07 엘지전자 주식회사 Refrigerator and method of operating a refrigerator
KR20150045796A (en) * 2013-10-21 2015-04-29 엘지전자 주식회사 Refrigerator

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