KR100290850B1 - Heat exchanger for refrigerator - Google Patents

Heat exchanger for refrigerator Download PDF

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Publication number
KR100290850B1
KR100290850B1 KR1019980000888A KR19980000888A KR100290850B1 KR 100290850 B1 KR100290850 B1 KR 100290850B1 KR 1019980000888 A KR1019980000888 A KR 1019980000888A KR 19980000888 A KR19980000888 A KR 19980000888A KR 100290850 B1 KR100290850 B1 KR 100290850B1
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South Korea
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heat exchanger
air
refrigerant
tri
refrigerator
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KR1019980000888A
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Korean (ko)
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KR19990065554A (en
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이장석
이상욱
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구자홍
엘지전자주식회사
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    • 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
    • F25D17/02Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating liquids, e.g. brine
    • 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
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28FDETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F1/00Tubular elements; Assemblies of tubular elements
    • F28F1/006Tubular elements; Assemblies of tubular elements with variable shape, e.g. with modified tube ends, with different geometrical features

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Geometry (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Defrosting Systems (AREA)

Abstract

PURPOSE: A heat exchanger for a refrigerator is provided to improve heat exchange efficiency by enlarging the contact area between air and the heat exchanger with contacting air blowing from a blower to the heat exchanger. CONSTITUTION: A tri-tube type heat exchanger(5) is composed of first and second refrigerant pipes(51), a defrosting pipe arranged between two refrigerant pipes, and fins connecting refrigerant pipes and the defrosting pipe. The heat exchanger is manufactured with integrally extrusion-molding and bending refrigerant and defrosting pipes and fins continuously. The upper part of the heat exchanger is inclined for the middle of the heat exchanger. Gaps between refrigerant pipes in the lower part are wide, and gaps in the upper part of the heat exchanger are narrow. Inflow of air is performed actively in the lower part with inclining the upper part, and heat exchange efficiency is improved with contacting air to the heat exchanger in the upper part.

Description

냉장고용 열교환기{heat exchanger for refrigerator}Heat exchanger for refrigerator

본 발명은 냉장고에 관한 것으로서, 더욱 상세하게는 냉장고용 열교환기에 관한 것이다.The present invention relates to a refrigerator, and more particularly to a heat exchanger for a refrigerator.

일반적으로 냉장고는 냉매를 압축 ― 응축 ― 팽창 ― 증발시키는 냉동사이클을 반복함에 따라 고내를 저온화시켜 음식물을 장기간동안 신선하게 보관할 수 있도록 한 냉동 및 냉장기기로서, 요식업소뿐만 아니라 일반가정에서도 거의 필수적으로 사용되고 있는 일반화된 가전제품이다.In general, a refrigerator is a refrigeration and refrigerating device that allows food to be kept fresh for a long time by reducing the temperature of the refrigerator by repeating a refrigeration cycle of compressing, condensing, expanding, and evaporating refrigerant, which is almost essential not only in restaurants but also in homes. It is a generalized home appliance that is used as.

상기와 같은 냉장고의 기본적인 구성을 개략적으로 설명하면 다음과 같다.The basic configuration of the refrigerator as described above is as follows.

다만, 설명과정에서 포함되는 구성요소들은 일반적으로 공지된 사항이므로 도시는 생략하기로 한다.However, components included in the description process are generally known, and thus the illustration is omitted.

냉장고는 저온 저압상태의 가스냉매를 고온 고압상태로 승온 승압시키는 압축기(Compressor)와, 상기 압축기로부터 유입되는 고온 고압가스 상태의 냉매를 냉각 응축하여 온도 40℃, 압력 9atm의 액체 냉매로 변환시키는 응축기(Condenser)와, 다른 부분의 냉매관 직경에 비해 축관되어 유입되는 냉매를 감압시키는 모세관(Capillary tube)과, 상기 모세관을 통한 냉매를 저온 저압 상태로 증발하면서 이에 비해 상대적으로 고온인 고내의 공기와 열교환되어 고내를 저온화시키는 증발기(Evaporator)등으로 구성되어 있다.The refrigerator includes a compressor for raising and lowering the gas refrigerant in a low temperature and low pressure state to a high temperature and high pressure state, and a condenser for cooling and condensing the refrigerant in the high temperature and high pressure gas state introduced from the compressor to a liquid refrigerant having a temperature of 40 ° C. and a pressure of 9 atm. (Condenser), a capillary tube for depressurizing the refrigerant introduced through the condenser compared to the diameter of the refrigerant pipe of the other portion, and the air in the chamber having a relatively high temperature while evaporating the refrigerant through the capillary at low temperature and low pressure. It consists of an evaporator which heat-exchanges and lowers the inside of a refrigerator.

상기의 장치들을 필수적으로 갖추고 있는 통상적인 냉장고의 형태는 도 1에서와 같이 냉장고의 외형을 구성하고 있는 단열재인 외부케이스(1)와, 상기 외부케이스의 내측 상부 또는 하부에 위치하며 증발기(이하“열교환기”라 함)(5)에 의해 열교환된 냉기가 직접 유입되어 약 -18℃의 실내온도를 유지하는 냉동실(2)과, 상기 냉동실과 베리어(Barrier)(4)에 의해 구분되며 냉동실측으로부터 냉기가 공급되는 과정에서 열교환됨에 따라 상기 냉동실(2)에 비해 고온(0∼7℃)상태의 실내온도를 유지하는 냉장실(3)로 대별되어 있으며, 상기 냉동실(2)과 냉장실(3)의 전방에는 각 실을 개폐하기 위한 도어(2a)(3a)가 각각 구비되어 있다.The conventional refrigerator is essentially equipped with the above-mentioned devices, as shown in FIG. Cold air heat exchanged by the heat exchanger (5) is introduced into the freezer compartment (2) and the freezer compartment (Barrier) (4) to maintain an indoor temperature of about -18 ℃, the freezer compartment side As it is heat exchanged in the process of supplying cold air from the refrigerator compartment 2 is divided into a refrigerator compartment (3) for maintaining a room temperature of a high temperature (0 ~ 7 ℃) state, compared to the freezer compartment (2), the freezer compartment (2) and the refrigerating compartment (3) In front of the doors, doors 2a and 3a for opening and closing the chambers are respectively provided.

한편, 상기의 열교환기(5)는 도 2에서와 같이 제 1, 2 냉매관(50)(51)과, 상기 두 냉매관사이에 나란하게 배열된 제상관(52)과, 상기 두 냉매관과 제상관 사이에 일체로 형성된 핀(Fin)(53)으로 구성되어 있다.Meanwhile, the heat exchanger 5 includes first and second refrigerant pipes 50 and 51, a defrost pipe 52 arranged side by side between the two refrigerant pipes, and the two refrigerant pipes as shown in FIG. 2. And a fin (53) integrally formed between the defrosting pipe.

상기 핀(53)상에는 장공형의 루버(Louvre)(54)가 일정간격으로 무수히 많이 형성되어 있으며, 상기 루버에는 이 루버로 통과하는 공기에 방향성을 부여하기 위해 루버를 가로질러 일정각도로 경사진 경사판(55)이 형성되어 있고, 상기의 제 1, 2 냉매관(50)(51), 제상관(52), 핀(53)을 “S”자형으로 연속반복되게 절곡하여 최종적인 열교환기의 형태를 이루게 되는데, 이를 이른바 트라이-튜브형(Tri-tube type) 열교환기라 한다.On the fin 53, a large number of long louvers 54 are formed at regular intervals, and the louvers are inclined at a predetermined angle across the louvers to give direction to the air passing through the louvers. The inclined plate 55 is formed, and the first and second refrigerant pipes 50, 51, the defrost pipe 52, and the fin 53 are repeatedly bent in a “S” shape to form a final heat exchanger. It forms a shape, which is called a tri-tube type heat exchanger.

상기 트라이 튜브형 열교환기(5)는 그 재질이 알루미늄(Al)으로 되어 있어 자체중량이 가벼울뿐만 아니라 성형성이 좋아 제작이 용이한 장점을 지니고 있으며, 통기성을 향상시켜 외부공기와의 열교환면적이 커짐에 따라 제상효율은 물론 열교환효율을 향상시킬 수 있는등의 장점이 있다.The tri-tube type heat exchanger (5) is made of aluminum (Al), which is not only light in weight but also has good moldability and is easy to manufacture. The heat exchange area of the tri-tube heat exchanger 5 is increased by improving air permeability. As a result, the defrosting efficiency as well as the heat exchange efficiency can be improved.

한편, 도 3에서와 같이 열교환기(5)를 정면에서 보았을 때 열교환기의 상부 중앙에 송풍팬(6)이 위치하고 있으므로 송풍팬으로 흡입되는 공기는 열교환기의 하부로부터 상부를 거치게 된다.Meanwhile, when the heat exchanger 5 is viewed from the front as shown in FIG. 3, the blower fan 6 is positioned at the upper center of the heat exchanger so that the air sucked into the blower fan passes through the upper portion from the bottom of the heat exchanger.

따라서, 송풍팬(6)의 송풍력에 의해 열교환기를 통하는 공기는 열교환기(5)의 하단부에서는 비교적 넓게 분포되어 유입되며, 열교환기(5)의 상부로 갈수록 점진적으로 통과면적이 좁아져 도면의 A영역에서와 같이 사다리꼴 형상이 된다.Accordingly, the air passing through the heat exchanger by the blowing force of the blower fan 6 is relatively distributed at the lower end of the heat exchanger 5, and gradually passes through the upper part of the heat exchanger 5 to narrow the passage area. As in area A, the shape becomes trapezoid.

이에 반하여 열교환기를 정면에서 보았을 때 인접하는 관(제 1, 2 냉매관과 제상관을 지칭함)과 관 사이가 일률적으로 평행하게 형성되어 있는 구조상 실질적으로 공기가 통과되는 부분(A영역)을 제외한 나머지 부분(B영역)에는 공기통과량이 적었으므로 열교환기(5)의 부피에 비해 열교환효율이 떨어지는 문제점이 있었다.On the other hand, when the heat exchanger is viewed from the front, except for the portion where the air passes substantially (area A) due to the structure in which the adjacent pipes (refer to the first and second refrigerant pipes and the defrost pipes) and the pipes are formed in parallel in a uniform manner. The portion (region B) had a small amount of air passage, so that the heat exchange efficiency was lowered compared to the volume of the heat exchanger 5.

본 발명은 상기와 같은 종래의 문제점을 해결하기 위해 안출한 것으로서, 그 목적은 송풍팬으로부터 불어오는 공기가 열교환기에 좀더 많이 접촉되도록하여 열전달효율을 향상시키기 위한 것이다.The present invention has been made to solve the conventional problems as described above, the object is to improve the heat transfer efficiency by allowing the air blowing from the blower fan more contact with the heat exchanger.

상기의 목적을 달성하기 위한 본 발명은 트라이 튜브형 열교환기를 구비한 냉장고에 있어서; 상기 트라이 튜브형 열교환기를 정면에서 보았을 때 그 상단이 열교환기의 중앙부쪽으로 기울어진 형태로 된 것을 특징으로 하는 냉장고용 열교환기를 제공함에 있다.The present invention for achieving the above object is a refrigerator provided with a tri-tubular heat exchanger; When viewed from the front of the tri-tube heat exchanger to provide a heat exchanger for a refrigerator, characterized in that the top is inclined toward the center portion of the heat exchanger.

도 1은 일반적인 냉장고의 일예를 도시한 측단면도1 is a side cross-sectional view showing an example of a typical refrigerator.

도 2는 종래 트라이-튜브형 열교환기를 도시한 사시도Figure 2 is a perspective view of a conventional tri-tube heat exchanger

도 3은 종래 트라이-튜브형 열교환기의 정면도3 is a front view of a conventional tri-tube heat exchanger

도 4는 본 발명의 트라이-튜브형 열교환기의 정면도4 is a front view of the tri-tube heat exchanger of the present invention;

도면의 주요부분에 대한 부호의 설명Explanation of symbols for main parts of the drawings

5 : 열교환기 50 : 제 1 냉매관5: heat exchanger 50: first refrigerant pipe

51 : 제 2 냉매관 53 : 제상관51: second refrigerant pipe 53: defrost pipe

이하, 첨부된 도 4를 참조하여 본 발명의 열교환기에 대해 상세히 설명하면 다음과 같다.Hereinafter, with reference to the accompanying Figure 4 will be described in detail for the heat exchanger of the present invention.

우선, 트라이 튜브형 열교환기의 구성은 제 1, 2 냉매관(50)(51)과, 상기 두 냉매관사이에 나란하게 배열된 제상관(52)과, 상기 두 냉매관과 제상관 사이를 잇는 핀(Fin)(53)이 일체로 압출성형되어 있다.First, the configuration of the tri-tube type heat exchanger is the first and second refrigerant pipes 50 and 51, the defrost pipe 52 arranged side by side between the two refrigerant pipes, and the connection between the two refrigerant pipes and the defrost pipe. Fin 53 is integrally extruded.

또한, 상기의 제 1, 2 냉매관(50)(51), 제상관(52), 핀(53)을 “S”자형으로 연속반복되게 절곡하여 최종적인 열교환기의 형태를 이루게 되는데, 이때 상기 열교환기(5)는 이를 정면에서 보았을 때 열교환기의 중앙부를 기점으로 양쪽 상단이 중앙부쪽으로 기울도록 형성되어 있다.In addition, the first and second refrigerant pipes 50, 51, defrost pipes 52, fins 53 are continuously bent in a “S” shape to form a final heat exchanger. The heat exchanger 5 is formed such that both upper ends thereof are inclined toward the center part from the center of the heat exchanger when viewed from the front.

그 이유는 송풍팬(6)이 열교환기(5)의 상단에 설치되어 있으므로 송풍팬의 회전력에 의해 공기를 흡입할때에는 필수적으로 열교환기를 거치게 되는데, 이때 열교환기를 거치는 공기는 열교환기의 하부로부터 상부를 향해 이동된다.The reason is that the blower fan 6 is installed on the top of the heat exchanger 5, so when the air is sucked by the rotational force of the blower fan, the air passes through the heat exchanger. Is moved towards.

상기 열교환기(5)로 유입되는 공기는 열교환의 하부에서는 넓은 영역을 점유하게 되고 상부로 올라올수록 점유영역이 좁아지므로 이러한 공기의 유입경로에 부응하기 위한 효과적인 형태이기 때문이다.This is because the air flowing into the heat exchanger 5 occupies a wide area in the lower part of the heat exchanger, and the area occupied by the upper part becomes narrower.

또 다른 이유로는 열교환기(5)의 하부로부터 유입되는 공기는 비교적 고온의 공기이므로 상대적으로 저온인 열교환기와 접촉되면 온도차에 의해 서리가 발생되는데, 이러한 서리는 최초 공기유입로인 열교환기(5)의 하부에서 주로 발생하게 된다.For another reason, since the air flowing from the lower part of the heat exchanger 5 is relatively hot air, when contacted with a relatively low temperature heat exchanger, frost is generated by the temperature difference. This frost is the first air inflow path 5. It occurs mainly at the bottom of.

따라서, 열교환기(5)의 상하부를 동시에 줄이게 되면 상술한 바와 같이온도차에 의해 열교환기의 하부는 착상되어 공기의 유입을 차단하게 됨으로써 냉동효율을 저하시키는 요인이 될 수 있다.Therefore, if the upper and lower parts of the heat exchanger 5 are simultaneously reduced, the lower part of the heat exchanger is formed by the temperature difference as described above, thereby blocking the inflow of air, which may be a factor of lowering the refrigeration efficiency.

이를 감안하여 상기와 같이 열교환기(5)의 상부에만 기울기를 형성하여 하부에서는 공기가 원활히 유입되도록 하고, 상부에서는 유입되는 공기가 열교환기와 접촉되도록하여 효율적인 열전달효과를 얻을 수 있게 된다.In view of this, the inclination is formed only on the upper part of the heat exchanger 5 as described above, so that air is smoothly introduced from the lower part, and the incoming air is brought into contact with the heat exchanger to obtain an efficient heat transfer effect.

한편, 상기와 같은 열교환기(5)는 알루미늄으로 되어 있고, 구조상 불완전한 형태이므로 장기간 사용할 때에는 내,외적 요인에 의하여 형상이 변경될 수 있는 소지가 있으므로 별도의 고정수단에 의해 냉장고 본체에 고정하는 것이 바람직하다.On the other hand, since the heat exchanger 5 is made of aluminum and is incomplete in structure, the shape of the heat exchanger 5 may change due to internal and external factors when it is used for a long time. desirable.

이상과 같은 본 발명의 열교환기를 적용함으로써 열전달 매체인 공기와 열교환기 접촉면적을 넓혀 열전달효율을 향상시킬 수 있는 효과가 있다.By applying the heat exchanger of the present invention as described above there is an effect that can improve the heat transfer efficiency by widening the contact area of the heat transfer medium and air.

Claims (1)

냉동실 후방에 설치되어, 공기와의 열교환을 수행하는 트라이튜브형 열교환기와, 상기 트라이튜브형 열교환기 상부에 설치되어 공기를 강제 순환시키는 송풍팬을 포함하는 냉장고에 있어서,In the refrigerator comprising a tri-tube heat exchanger installed in the rear of the freezing chamber, and performing a heat exchange with the air, and a blowing fan installed in the upper portion of the tri-tube heat exchanger forcibly circulating air, 상기 트라이튜브형 열교환기의 하부측에서 굴곡하는 냉매관의 간격은 넓게 하고, 상기 트라이튜브형 열교환기의 상부측에서 굴곡하는 냉매관의 간격은 좁게 함과 동시에 상기 냉매관을 대략 중앙부를 기준으로 좌우 대칭되게 굴곡 형성하여, 상기 송풍팬의 흡입력에 의해 공기가 열교환기의 하부측에서는 원활히 유입되고, 열교환기의 상부측에서는 공기의 토출영역에 포함되는 냉매관을 증가시켜 열교환효율을 향상시키는 것을 특징으로 하는 냉장고용 열교환기.The interval between the refrigerant pipes bent at the lower side of the tri-tube heat exchanger is widened, and the interval between the refrigerant pipes bent at the upper side of the tri-tube heat exchanger is narrowed, and the refrigerant tube is symmetrically symmetrically with respect to the center. It is formed to be bent, the air flows smoothly in the lower side of the heat exchanger by the suction force of the blower fan, on the upper side of the heat exchanger to increase the refrigerant pipe included in the discharge area of the air to improve the heat exchange efficiency Heat exchanger.
KR1019980000888A 1998-01-14 1998-01-14 Heat exchanger for refrigerator KR100290850B1 (en)

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