KR20030038599A - A pipe for a refrigerating machine - Google Patents

A pipe for a refrigerating machine Download PDF

Info

Publication number
KR20030038599A
KR20030038599A KR1020030023926A KR20030023926A KR20030038599A KR 20030038599 A KR20030038599 A KR 20030038599A KR 1020030023926 A KR1020030023926 A KR 1020030023926A KR 20030023926 A KR20030023926 A KR 20030023926A KR 20030038599 A KR20030038599 A KR 20030038599A
Authority
KR
South Korea
Prior art keywords
refrigerant
tube
pipe
coolant
inner tube
Prior art date
Application number
KR1020030023926A
Other languages
Korean (ko)
Inventor
위성점
Original Assignee
위성점
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 위성점 filed Critical 위성점
Priority to KR1020030023926A priority Critical patent/KR20030038599A/en
Publication of KR20030038599A publication Critical patent/KR20030038599A/en
Priority to PCT/KR2004/000880 priority patent/WO2004092673A1/en

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F1/00—Tubular elements; Assemblies of tubular elements
    • F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
    • F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
    • F28F1/34—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending obliquely
    • F28F1/36—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending obliquely the means being helically wound fins or wire spirals
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F1/00—Tubular elements; Assemblies of tubular elements
    • F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D7/10—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged one within the other, e.g. concentrically
    • F28D7/106—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged one within the other, e.g. concentrically consisting of two coaxial conduits or modules of two coaxial conduits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F1/00—Tubular elements; Assemblies of tubular elements
    • F28F1/02—Tubular elements of cross-section which is non-circular
    • F28F1/06—Tubular elements of cross-section which is non-circular crimped or corrugated in cross-section
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2210/00—Heat exchange conduits
    • F28F2210/06—Heat exchange conduits having walls comprising obliquely extending corrugations, e.g. in the form of threads

Landscapes

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

Abstract

PURPOSE: A heat exchange pipe for a refrigerating machine is provided to maximize efficiency of heat exchange. CONSTITUTION: A heat exchange pipe includes an inner pipe(10) forming a coolant circulation channel; and an outer pipe(20) forming a refrigerant circulation channel with the inner pipe. At least two spiral grooves(30) are formed on a periphery of the inner pipe to form the refrigerant circulation channel and to protrude toward an inside of the inner pipe. Peak parts of the spiral grooves are formed to be attached on an inside wall of the outer pipe so that at least two of the refrigerant circulation channel are formed independently. Preferably, three of the spiral grooves are formed on the periphery of the inner pipe. Ratio between flow rates of the inner pipe in which coolant circulates and the spiral grooves in which refrigerant circulates is 1:3. Area of the metal inner pipe contacting with refrigerant and coolant is maximized thereby. Heat transmitting efficiency is maximized as refrigerant and coolant are cooled down not by fluid with low heat transmitting efficiency but by direct contact with the pipe, a contacting medium.

Description

냉동기기용 열교환관{A pipe for a refrigerating machine}Heat exchanger tube for refrigerating machine {A pipe for a refrigerating machine}

본 발명은 냉동기기용 열교환관에 관한 것으로, 더욱 상세하게는 이중관으로 이루어진 수냉식 열교환관의 내관 외주연에 냉매가 유동되는 두 개 이상의 나선홈을 형성하여서 냉매와 냉각수 접수면적으로 최대화함과 더불어 냉매와 냉각수의 유동이 난류 유동되게 하여 열교환효율을 극대화 할 수 있도록 함을 목적으로 한 것이다.The present invention relates to a heat exchanger tube for a refrigeration machine, and more particularly, by forming two or more spiral grooves in which a refrigerant flows on an inner circumference of an inner tube of a water-cooled heat exchanger tube composed of a double tube, thereby maximizing the refrigerant and the coolant reception area and The purpose of the present invention is to maximize the heat exchange efficiency by allowing the flow of cooling water to be turbulent.

일반적으로, 냉동기기는 냉매를 고압을 압송하는 콤프레셔와, 상기 콤프레셔에서 압송된 냉매를 냉각시키는 콘덴서와, 상기 콘덴서에서 냉각되어 공급된 냉매를 팽창시켜 주변으로부터 열을 흡수하여 냉각시키는 증발기로 구성된 것이다.In general, a refrigerating device comprises a compressor for compressing a refrigerant at a high pressure, a condenser for cooling the refrigerant conveyed by the compressor, and an evaporator for expanding the refrigerant supplied by the condenser and absorbing heat from the surroundings to cool the refrigerant. .

상기한 바와 같은 냉동기기의 콘덴서는 냉매관이 순환되는 열교환관을 지그재그로 배열하고, 상기 열교환관 사이에 냉각핀을 개재시켜서 대기중의 공기와의 접촉에 의하여 냉각이 이루어지게 구성된 것이다.The condenser of the refrigerating device as described above is arranged in a zigzag arrangement of the heat exchanger tube through which the refrigerant tube is circulated, and is configured to be cooled by contact with air in the air by interposing a cooling fin between the heat exchanger tubes.

이상과 같은 종래 콘덴서의 열교환관은 공기와 접촉에 의한 대류이동에 의하여 냉각이 이루어지므로 열교환효율이 미약한 문제점이 있었다.Since the heat exchanger tube of the conventional condenser as described above is cooled by convection movement by contact with air, the heat exchange efficiency has a weak problem.

이에, 상기 열교환관을 이중관체로 형성하여 내관에는 냉각수가 순환되게 하고, 상기 내관과 외관 사이에 냉매가 순환되는 냉매순환관로를 형성하여서 대류이동에 의한 냉각이 아닌 냉각수와의 직접 접촉에 의하여 냉각이 이루어지게 하므로서 냉각효율을 극대화 하였다.Accordingly, the heat exchange tube is formed into a double tube to allow cooling water to circulate in the inner tube, and a refrigerant circulation tube path through which the refrigerant is circulated between the inner tube and the outer tube so that cooling is performed by direct contact with the cooling water rather than by convection movement. By maximizing the cooling efficiency.

그러나, 상기한 바와 같이 이중관으로 이루어진 종래의 열교환관은 내관과 외관 사이에 형성되는 냉매순환관로의 간격을 일정하게 유지하기가 용이하지 않으며, 냉매와 냉각수의 흐름이 단순한 층류 유동을 하게 되어 있어 냉각수가 순환되는 내관으로부터 먼곳에 위치되는 냉매와의 열교환이 원활하게 이루어지지 않는 등의 문제점이 있었다.However, the conventional heat exchanger tube made of a double tube as described above is not easy to maintain a constant interval between the refrigerant circulation pipe formed between the inner tube and the exterior, and the coolant and the coolant flow is a simple laminar flow There was a problem such that heat exchange with a refrigerant located far away from the inner tube through which the gas is circulated is not performed smoothly.

이에, 본 발명을 상술한 문제점을 해결하기 위하여 창출한 것으로, 이중관구조로 이루어진 열교환관에 있어서 냉각수가 순환되는 내관의 외주연에 냉매가 유동되는 두 개 이상의 나선홈을 형성하여 냉매와 냉각수의 접수면적을 극대화하며 냉매와 냉각수가 난류유동되게 하여 열교환효율을 극개화 할 수 있게 한 것이다.Accordingly, the present invention was created in order to solve the above-described problems, and in the heat exchanger tube having a double tube structure, two or more spiral grooves in which the refrigerant flows are formed at the outer periphery of the inner tube through which the coolant is circulated to receive the refrigerant and the coolant. It maximizes the area and maximizes heat exchange efficiency by allowing turbulent flow of refrigerant and coolant.

도 1 은 본 발명에 따른 일 실시예를 보인 사시도.1 is a perspective view showing an embodiment according to the present invention.

도 2 는 본 발명에 따른 일 실시예를 보인 측 단면도.Figure 2 is a side cross-sectional view showing an embodiment according to the present invention.

도 3 은 본 발명에 따른 일 실시예를 보인 정 단면도.Figure 3 is a cross-sectional view showing an embodiment according to the present invention.

<도면의 주요부분에 대한 부호의 설명><Description of the symbols for the main parts of the drawings>

10 : 내관10: inner tube

20 : 외관20: appearance

30 : 나선홈30: spiral groove

이하, 첨부된 도면에 의하여 상세히 설명하면 다음과 같다.Hereinafter, described in detail by the accompanying drawings as follows.

본 발명은 냉매와 냉각수의 접수면적을 극대화함과 더불어 회류유동에 의한 난류유동을 유발시켜 열교환효율을 극대화 할 수 있도록 한 것으로, 냉각수 순환관로를 형성하는 내관(10)과, 상기 내관(10)과 외관(20)사이에 냉매순환관로를 형성한 냉동기기의 열교환관에 있어서; 상기 내관(10)의 외주연에 냉매순환관로를 형성하며 내관(10)의 내측으로 돌출되는 나선돌기를 형성하는 두 개 이상의 나선홈(30)을 형성한 것이다.The present invention is to maximize the receiving area of the refrigerant and the cooling water and to maximize the heat exchange efficiency by causing turbulent flow by the circulating flow, the inner tube (10) and the inner tube (10) forming a cooling water circulation pipe In the heat exchange tube of the refrigerating machine, the refrigerant circulation pipe line is formed between the outer and the exterior (20); Two or more spiral grooves 30 are formed on the outer circumference of the inner tube 10 to form a refrigerant circulation pipe and form a spiral protrusion protruding into the inner tube 10.

여기서, 상기 나선홈(30)에 의하여 형성되는 두 개 이상의 냉매순환관로가 각기 독립적인 관로를 형성할 수 있게 나선홈(30)의 산부위가 외관의 내벽에 밀착되게 형성하여 실시함이 바람직한 것이다.Here, the two or more refrigerant circulation pipes formed by the spiral grooves 30 are preferably formed so that the mountain portion of the spiral grooves 30 closely adheres to the inner wall of the exterior so as to form independent pipelines. .

그리고, 상기 나선홈(30)은 세줄 형성하여 실시함이 바람직한 것으로, 냉각수가 순환되는 내관(10)의 유량과 상기 냉매가 순환되는 나선홈(30)의 유량비는 1 : 3 으로 형성하여 실시함이 바람직한 것이다.In addition, the spiral groove 30 is preferably formed by three lines, and the flow rate ratio of the inner pipe 10 through which the coolant is circulated and the flow rate between the spiral groove 30 through which the refrigerant is circulated is 1: 3. This is desirable.

이하, 본 발명에 의한 열교환 과정을 설명하면 다음과 같다.Hereinafter, the heat exchange process according to the present invention will be described.

상기한 바와 같이 냉각수순환관로를 형성하는 내관(10)과, 상기 내관(10)과 외관(20) 사이에 냉매순환관로를 형성한 냉동기기의 열교환관에 있어서 상기 내관의 외주연에 냉매순환관로를 형성하며 내관(10)의 내측으로 돌출되는 나선돌기를 형성하는 두 개 이상의 나선홈(30)을 형성한 본 발명을 냉동기기에 적용하여 실시하게 되면, 상기 내관(10)으로 유입된 냉각수는 회류유동되며 순환되어 중심부와 내관(10)에 접한 냉각수가 서로 순환믹싱되며 유동되게되고, 상기 내관(10)의 외면에 형성한 나선홈(30)을 따라 유동되는 냉매도 회류유동되며 중앙부위와 외측의 냉매가 순환되며 유동되게 되는 것이다.As described above, in the heat exchanger tube of the inner tube (10) forming the cooling water circulation line and the refrigerant circulation pipe line formed between the inner tube (10) and the exterior (20), the refrigerant circulation tube at the outer circumference of the inner tube. When the present invention is applied to the refrigerator by forming two or more spiral grooves 30 forming spiral protrusions protruding inwardly of the inner tube 10, the cooling water introduced into the inner tube 10 is The circulation flow is circulated and the cooling water contacting the center and the inner tube 10 are circulated and mixed with each other to flow, and the refrigerant flowing along the spiral groove 30 formed on the outer surface of the inner tube 10 is also flowed through the central portion and The refrigerant outside is circulated and flows.

이상과 같이 냉매가 중앙부위와 외측이 서로 믹싱되게 되면 금속보다 열전도율이 낮은 냉매 자체의 열전달에 의한 냉각이 아니라 고루게 순환되며 금속제의 내관과 직접 접촉을 통하여 열전달이 이루어지고 냉각수 또한 동일한 과정을 통하여 열전달이 이루어지므로 냉각수에 의한 냉매의 냉각이 효율적으로 이루어지는 것이다.As described above, when the coolant is mixed with the center and the outside, the coolant is circulated evenly instead of cooling by the heat transfer of the coolant itself, which has a lower thermal conductivity than the metal, and heat is transferred through direct contact with the inner tube made of metal. Since the heat transfer is performed, the cooling of the refrigerant by the cooling water is efficiently performed.

또한, 내관(10)의 외벽이 요입된 나선홈(30)을 따라 냉매가 유동되게 되어 있어 접수면적이 극대화되는 것이다.In addition, since the refrigerant flows along the spiral groove 30 in which the outer wall of the inner tube 10 is recessed, the reception area is maximized.

따라서, 본 발명은 냉각수가 순환되는 내관의 외주연에 요입형성된 두 개이상의 나선홈으로 이루어진 냉매순환관로를 형성하므로서 냉매와 냉각수의 접촉매개체인 내관의 접수면적이 극대화되며, 순환되는 냉매 및 냉각수 자체의 냉각이 열전달이 낮은 유체 자체에 의한 것이 아닌 접촉매개체인 관체와의 직접접촉에 의하여 이루어져 열전달효율이 극대화되는 매우 유용한 것이다.Therefore, the present invention forms a refrigerant circulation conduit consisting of two or more spiral grooves formed in the outer periphery of the inner tube through which the coolant is circulated, thereby maximizing the receiving area of the inner tube, which is the contact medium between the coolant and the coolant, and circulating the refrigerant and the coolant itself. The cooling is not by the fluid itself, which is low in heat transfer, but by direct contact with the tube, which is the contact medium, which is very useful for maximizing heat transfer efficiency.

Claims (3)

냉각수가 순환되는 내관과 상기 내관과 외관사이에 냉매순환관로를 형성한 냉동기기의 열교환관에 있어서;A heat exchange tube of a refrigerating device, wherein a refrigerant circulation pipe is formed between an inner tube through which cooling water is circulated, and a coolant circulation pipe line between the inner tube and an outer tube; 상기 내관(10)의 외주연에 냉매순환관로를 형성하며 내관의 내측으로 돌출되는 나선돌기를 형성하는 두 개 이상의 나선홈(30)을 형성한 것을 특징으로 하는 냉동기기용 열교환관.Refrigerant heat exchanger tube, characterized in that to form a refrigerant circulation pipe path on the outer periphery of the inner tube (10) and formed two or more spiral grooves (30) to form a spiral protrusion protruding into the inner tube. 제 1 항에 있어서;The method of claim 1; 상기 나선홈(30)에 의하여 형성되는 두 개 이상의 냉매순환관로가 각기 독립적인 관로를 형성할 수 있게 나선홈(30)의 산부위가 외관의 내벽에 밀착되게 형성한 것을 특징으로 하는 냉동기기용 열교환관.Heat exchanger for a refrigeration machine, characterized in that the mountain portion of the spiral groove 30 is formed in close contact with the inner wall of the exterior so that two or more refrigerant circulation pipes formed by the spiral groove 30 can form independent pipelines, respectively. tube. 제 1 항에 있어서;The method of claim 1; 상기 나선홈(30)은 세줄 형성하고, 냉각수가 순환되는 내관(10)의 유량과 상기 냉매가 순환되는 나선홈(30)의 유량비는 1 : 3 으로 형성한 것을 특징으로 하는 냉동기기용 열교환관.The spiral groove (30) is formed in three lines, the flow rate ratio of the flow rate of the inner tube (10) through which the cooling water is circulated and the spiral groove (30) through which the refrigerant is circulated, characterized in that formed by 1: 3.
KR1020030023926A 2003-04-16 2003-04-16 A pipe for a refrigerating machine KR20030038599A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
KR1020030023926A KR20030038599A (en) 2003-04-16 2003-04-16 A pipe for a refrigerating machine
PCT/KR2004/000880 WO2004092673A1 (en) 2003-04-16 2004-04-16 A heat exchange pipe for a refrigerating machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020030023926A KR20030038599A (en) 2003-04-16 2003-04-16 A pipe for a refrigerating machine

Publications (1)

Publication Number Publication Date
KR20030038599A true KR20030038599A (en) 2003-05-16

Family

ID=29579352

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020030023926A KR20030038599A (en) 2003-04-16 2003-04-16 A pipe for a refrigerating machine

Country Status (2)

Country Link
KR (1) KR20030038599A (en)
WO (1) WO2004092673A1 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100555216B1 (en) * 2005-08-23 2006-03-03 김진태 draught beer selling apparatus
KR100893620B1 (en) * 2007-04-10 2009-04-20 노창식 Cooling coil for an induction-heating
US7866378B2 (en) 2004-11-09 2011-01-11 Denso Corporation Double-wall pipe, method of manufacturing the same and refrigerant cycle device provided with the same
KR101031101B1 (en) * 2009-01-14 2011-04-25 손광억 separation type heat exchanger
KR101437560B1 (en) * 2013-04-24 2014-09-04 주식회사 카이저제빙기 A heat exchanger for water cooling system

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7347059B2 (en) * 2005-03-09 2008-03-25 Kelix Heat Transfer Systems, Llc Coaxial-flow heat transfer system employing a coaxial-flow heat transfer structure having a helically-arranged fin structure disposed along an outer flow channel for constantly rotating an aqueous-based heat transfer fluid flowing therewithin so as to improve heat transfer with geological environments
US7363769B2 (en) 2005-03-09 2008-04-29 Kelix Heat Transfer Systems, Llc Electromagnetic signal transmission/reception tower and accompanying base station employing system of coaxial-flow heat exchanging structures installed in well bores to thermally control the environment housing electronic equipment within the base station
JP6172950B2 (en) * 2012-02-01 2017-08-02 株式会社Uacj Double tube for heat exchanger

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1096147A (en) * 1976-04-28 1981-02-24 James L. Cunningham Heat transfer tube and method of making same
JPH1038491A (en) * 1996-07-23 1998-02-13 Toyo Radiator Co Ltd Double tube type heat exchanger
JP2001201275A (en) * 2000-01-21 2001-07-27 Daikin Ind Ltd Double tube heat exchanger

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7866378B2 (en) 2004-11-09 2011-01-11 Denso Corporation Double-wall pipe, method of manufacturing the same and refrigerant cycle device provided with the same
US9669499B2 (en) 2004-11-09 2017-06-06 Denso Corporation Double-wall pipe, method of manufacturing the same and refrigerant cycle device provided with the same
KR100555216B1 (en) * 2005-08-23 2006-03-03 김진태 draught beer selling apparatus
KR100893620B1 (en) * 2007-04-10 2009-04-20 노창식 Cooling coil for an induction-heating
KR101031101B1 (en) * 2009-01-14 2011-04-25 손광억 separation type heat exchanger
KR101437560B1 (en) * 2013-04-24 2014-09-04 주식회사 카이저제빙기 A heat exchanger for water cooling system

Also Published As

Publication number Publication date
WO2004092673A1 (en) 2004-10-28

Similar Documents

Publication Publication Date Title
CN111156841B (en) Plate heat exchanger intelligently controlled according to outlet temperature
KR20030038599A (en) A pipe for a refrigerating machine
CN111238265B (en) Water-cooling plate heat exchanger with pulsating vibration
CN100373100C (en) Outdoor unit of air-conditioner
CN111336843B (en) Water-cooling plate heat exchanger with circular structure
CN111336844B (en) Circular structure plate heat exchanger with adjacent temperature comparison control flow
CN110793370B (en) Design method of water-cooled tube plate heat exchanger
CN111238264B (en) Water-cooling plate heat exchanger capable of distributing flow according to wall surface temperature
CN202792723U (en) Parallel flow condenser for freezer
KR100575278B1 (en) A tube for heat exchange with a capillary-type heat pipe
CN105485969B (en) Heat-exchanger rig and semiconductor freezer with the heat-exchanger rig
CN110779371A (en) Water-cooling tube-plate heat exchanger with optimally distributed fluid inlet and outlet
CN113405382B (en) Shell and tube heat exchanger
CN105466100B (en) Heat-exchanger rig and semiconductor freezer with the heat-exchanger rig
CN216592334U (en) High-temperature-resistant and corrosion-resistant spiral evaporator
CN216308690U (en) Shell and tube heat exchanger
CN217685994U (en) Air conditioner outdoor unit and air conditioner
CN218672462U (en) Semiconductor refrigerating system
TWM628966U (en) Fin exchange device capable of selecting liquid and gas operation
CN218723356U (en) Auxiliary cooling device for cooling water of refrigerator
CN110779372B (en) Water-cooled tube plate heat exchanger with variable cylindrical fin spacing
CN111156840B (en) Water-cooling plate heat exchanger with uniform heat exchange
KR200288633Y1 (en) Multistep Continuous Heat-Exchange System
KR19990034215U (en) Condenser of heat exchanger
KR100339565B1 (en) Condenser for refrigerator

Legal Events

Date Code Title Description
A201 Request for examination
N231 Notification of change of applicant
E902 Notification of reason for refusal
E90F Notification of reason for final refusal
E601 Decision to refuse application
E801 Decision on dismissal of amendment