JP3625259B2 - Heat exchanger - Google Patents

Heat exchanger

Info

Publication number
JP3625259B2
JP3625259B2 JP20435499A JP20435499A JP3625259B2 JP 3625259 B2 JP3625259 B2 JP 3625259B2 JP 20435499 A JP20435499 A JP 20435499A JP 20435499 A JP20435499 A JP 20435499A JP 3625259 B2 JP3625259 B2 JP 3625259B2
Authority
JP
Japan
Prior art keywords
heat exchanger
heat
tube
height
tubes
Prior art date
Legal status (The legal status 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 status listed.)
Expired - Fee Related
Application number
JP20435499A
Other languages
Japanese (ja)
Other versions
JP2001033193A (en
Inventor
宗夫 桜田
宗一 加藤
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Valeo Thermal Systems Japan Corp
Original Assignee
Zexel Valeo Climate Control Corp
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 Zexel Valeo Climate Control Corp filed Critical Zexel Valeo Climate Control Corp
Priority to JP20435499A priority Critical patent/JP3625259B2/en
Priority to DE60040620T priority patent/DE60040620D1/en
Priority to EP00912901A priority patent/EP1256771B1/en
Priority to PCT/JP2000/001935 priority patent/WO2001006194A1/en
Publication of JP2001033193A publication Critical patent/JP2001033193A/en
Application granted granted Critical
Publication of JP3625259B2 publication Critical patent/JP3625259B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Images

Classifications

    • 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
    • F28F1/10Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
    • F28F1/12Tubular 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
    • F28F1/126Tubular 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 consisting of zig-zag shaped fins
    • F28F1/128Fins with openings, e.g. louvered fins
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28DHEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D1/00Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
    • F28D1/02Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
    • F28D1/04Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits
    • F28D1/0408Multi-circuit heat exchangers, e.g. integrating different heat exchange sections in the same unit or heat exchangers for more than two fluids
    • F28D1/0426Multi-circuit heat exchangers, e.g. integrating different heat exchange sections in the same unit or heat exchangers for more than two fluids with units having particular arrangement relative to the large body of fluid, e.g. with interleaved units or with adjacent heat exchange units in common air flow or with units extending at an angle to each other or with units arranged around a central element
    • F28D1/0435Combination of units extending one behind the other

Description

【0001】
【発明の属する技術分野】
本発明は、相互に用途の異なる二以上の熱交換器を組み合わせた熱交換器に関する。
【0002】
【従来の技術】
従来において、例えば、車両用に用いられる熱交換器は、相互に異なる作用を有する二以上の熱交換器を組み合わせた熱交換器が用いられている。
【0003】
例えば、特開平10−306994号公報には、エンジンのラジエータコア部と、車両用空調装置のコンデンサコア部を一体に構成した熱交換器の発明が開示されている。また、特開平10−253276号公報は、コンデンサコア部とラジエータコア部のチューブ間に配置するフィン幅と、ルーバ枚数の比に着目し、一体的に形成された二つの熱交換器のうち必要放熱量の小さい熱交換器は、前記フィン幅とルーバ枚数の比が小さくなり、必要放熱量の大きい熱交換器は、前記必要放熱量の小さい熱交換器よりも、フィン幅とルーバ枚数の比が大きくなるように熱交換器を構成している。
【0004】
また、特開平10−170184号公報は、二つの熱交換器のチューブ間に装着されるフィンに形成されるルーバ形状に着目し、一の熱交換器に装着するフィンに形成するルーバ形状と、他の熱交換器に装着するフィンに形成するルーバの形状を異なるものとして、二つの熱交換器の熱交換効率の向上を図っている。
【0005】
【発明が解決しようとする課題】
前記公報に掲載された発明のように、二以上の熱交換器を通風方向に対して並列に配置した場合、例えば、二以上の熱交換器を車両に搭載すると、通風方向に対して風上側の熱交換器に外気の通流を阻まれるため、風下側に配置した熱交換器の熱交換性能を維持することは困難である。
【0006】
すなわち、図4に示すように、第一の熱交換器を構成するチューブ13の高さhc’と、第二の熱交換器を構成するチューブ14の高さhr’が同一であると、通風方向の風上側に設置された第一の熱交換器のチューブ13の存在により、この第一の熱交換器のチューブ13を通過した空気は、風速が低下し、その後流側で広がって、第二の熱交換器のチューブ14の表面並びにフィン6のチューブ近傍は風速低下部分となってしまい、第二の熱交換器の熱交換性能が著しく低下するものである。
【0007】
また、設置スペースの制限されたエンジンルーム内に熱交換器を搭載するためには、第一及び第二の熱交換器を、可能な限り近接する必要があり、加えて、軽量化を図ることも要求されている。
【0008】
特に、通風方向に対して直交するようにチューブが設置されていると、高温の媒体が通流する第二の熱交換器のチューブ面に外気が接触せず、熱交換性能が妨げられる。特に、第一及び第二の熱交換器を構成するチューブのピッチが同一であった場合、第二の熱交換器を構成するチューブ面には、外気が通風せず、第二の熱交換器の放熱量は著しく低くなる。
【0009】
そこで、本発明は、前記問題点に鑑みてなされたもので、通風方向に対して直交するように並列に設置した二以上の熱交換器において、風下側の熱交換器の熱交換性能の維持を可能とする熱交換器を提供することを目的とする。
【0010】
【課題を解決するための手段】
本願第1請求項に記載した発明は、通風方向の風上側乃至風下側に通風方向に対して直交するように並列配置された二以上の熱交換器において、前記熱交換器は、複数のチューブを積層してなるものであって、通風方向の風上側に配置された一の熱交換器と、風下側に配置された他の熱交換器は、異なる熱媒体が用いられるものであり、通風方向の風上側に配置された前記一の熱交換器のチューブの高さは、風下側に配置された前記他の熱交換器のチューブの高さよりも小さく構成した熱交換器である。
【0011】
このように、通風方向に対して直交するように並列に二以上の熱交換器を配置する場合、風上側の熱交換器のチューブの高さを、風下側に配置する熱交換器のチューブの高さよりも小さくすると、前記熱交換器のチューブ及びフィン間を通流する外気は、風上側に配置した熱交換器のチューブに阻まれることなく、風下側に設置した熱交換器のチューブ面を通流する。したがって、高温の媒体が通流するチューブから放熱が行われ、風下側に配置した第二の熱交換器の熱交換性能を維持できる。
【0012】
本願第2請求項に記載した発明は、前記請求項1記載の発明において、前記並列に配置された二以上の各熱交換器の各チューブは、チューブの積層間隔が略同一であるとともに、通風方向の風上側に配置された前記一の熱交換器のフィンの高さは、風下側に配置された前記他の熱交換器のフィンの高さよりも小さい構成の熱交換器である
【0013】
例えば、通風方向に対して直交するように第一の熱交換器及び第二の熱交換器が並列に設置された場合、特に、第一の熱交換器と第二の熱交換器を構成するチューブの積層間隔が同一で、それぞれのチューブ高さが同一、若しくは第一の熱交換器のチューブ高さが高いと、通風方向風上側となる第一の熱交換器のチューブの存在により、この第一の熱交換器のチューブを通過した外気は、風速が低下し、その後流側で広がって、第二の熱交換器のチューブの表面並びにフィンのチューブ近傍は風速低下部分となってしまい、第二の熱交換器の熱交換性能が著しく低下してしまう。
【0014】
請求項においては、通風方向の風上側に配置された前記一の熱交換器のフィンの高さが、風下側に配置された前記他の熱交換器のフィンの高さよりも小さく、そして、第一及び第二の熱交換器を構成するチューブの積層間隔が略同一である場合であっても、第一の熱交換器を構成するチューブの高さが、第二の熱交換器を構成するチューブの高さよりも低くなるため、外気の通風を妨げず、そしてこの外気が、第二の熱交換器を構成するチューブ面に到達するため、第二の熱交換器の熱交換性能を維持することができる。
【0015】
本願第3請求項に記載した発明は、前記請求項1又は2いずれか記載の発明において、前記熱交換器を構成する前記各チューブの高さは、1.6mm未満である。
【0016】
熱交換器を構成するチューブは、熱交換器の熱交換効率及びその軽量化を考慮し、そのチューブ高さが1.6mm未満となることが望ましい。とりわけ、第一の熱交換器がコンデンサの場合は、チューブ高さが1.3mm以下となるように寸法設定すると、熱交換効率が更に向上し、熱交換器の小型化、軽量化が一層可能となるものである。
【0017】
本願第4請求項に記載した発明は、前記請求項1乃至3いずれか記載の発明において、前記並列配置された二以上の各熱交換器の間隔は、15mm以下である。
【0018】
例えば、エンジンルーム内に第一及び第二の熱交換器を搭載する場合、設置スペースを低減するため、並列に設置する第一及び第二の熱交換器は、可能な限り近接して設けることが望ましい。一方、第一及び第二の熱交換器を近接して配置すると、通風方向風上側に設置した第一の熱交換器によって、第二の熱交換器に通流する外気が妨げられてしまい、通風方向風下側に設置した熱交換器の熱交換性能が維持できない。
【0019】
本発明のように、風上側に設置した熱交換器を構成するチューブの高さは、風下側に設置した熱交換器を構成するチューブの高さよりも小さく設定しているため、第一及び第二の熱交換器の間隔を15mmのように近接して配置した場合であっても、第二の熱交換器の熱交換性能は維持される。
【0020】
本願第5請求項に記載した発明は、前記請求項1乃至4いずれか記載の発明において、一の熱交換器は、コンデンサであり、他の熱交換器はラジエータである。
【0021】
すなわち、エンジンルーム内に搭載する熱交換器は、高い熱交換性能が要求される、空調用の熱交換サイクルを構成するコンデンサと、エンジンを冷却するラジエータを近接して設置する場合が多い。
【0022】
本願第6請求項に記載した発明は、前記請求項1乃至5いずれか記載の発明において、前記二以上の熱交換器は、共通の部材を用いて一体的に構成した。
【0023】
二以上の熱交換器は、共通部材、例えばブラケットを用いて一体的に構成すると、熱交換器の軽量化を図り、設置スペースを拡大することなく、エンジンルーム内等における取り付けが容易となる。
【0024】
【発明の実施の形態】
図1は、本例の概略構成を示す斜視図である。
【0025】
図1に示すように、本例の熱交換器は、第一及び第二の熱交換器1,2が通風方向に対して並列に配置されている。
【0026】
また、各熱交換器1,2は、複数のチューブ3,4と放熱面積を拡大するため、前記チューブ3,4間にフィン5,6を装着し、前記チューブ3,4及びフィン5、6が複数段積層され、チューブ3、4の両端部がそれぞれヘッダタンク7,8,9,10に接続している。熱交換媒体は、各ヘッダタンク7,8から各チューブ3,4間に分配されて通流し、チューブ3,4及びフィン5,6からの放熱によって高温の媒体が低温の媒体となるように熱交換を行っている。
【0027】
なお、図中矢印は、外気の通風方向を示している。
【0028】
また、本例の第一及び第二の熱交換器1,2は、共通の部材を用いて保持され、一体的に構成されている。本例では、ブラケット15を用いて、第一及び第二の熱交換器1,2をボルトで保持している。具体的には、双方の熱交換器の上下の各エンドプレートに、上下部で各二つのブラケット15を配置し、前後方向にボルトを挿通して固着している。このように第一及び第二の熱交換器を共通の部材で一体的に構成すると、部材の共通化により、それぞれの熱交換器に個別に設けていたブラケットが不要になるため、熱交換器を軽量化でき、容易にエンジンルーム内に取り付けられる。
【0029】
本例においては、通風方向風上側に第一の熱交換器1である車両用空調装置のコンデンサを設置し、通風方向風下側に第二の熱交換器2であるエンジンのラジエータを設置している。
【0030】
本例の熱交換器1,2は、第一の熱交換器1であるコンデンサと第二の熱交換器2であるラジエータの間隔Kは、設置スペースの低減を図るため、15mmである。特に、車両に搭載する場合、設置スペースを低減することは、重要である。
【0031】
このように、第一の熱交換器1と第二の熱交換器2の間隔が近接して設けられていると、通風方向の風上側に設置された第一の熱交換器1によって、外気の通風が妨げられ、第二の熱交換器2、特に、媒体が通流するチューブ4面に外気が通流せず、所望の熱交換性能が得られない。
【0032】
したがって、本例においては、通風方向に対して直交するように並列に配置した第一の熱交換器1を構成するチューブ高さhcを第二の熱交換器2を構成するチューブ高さhrよりも小さくしている。
【0033】
すなわち、通風方向に直交して並列に配置する第一及び第二の熱交換器を構成するチューブの高さは、hc<hrの関係となっている。
【0034】
図2は、チューブ3,4及びフィン5,6を示す第一及び第二の熱交換器1,2の一部断面図である。なお、図中11,12は、フィン5,6に形成したルーバである。なお、図中矢印は、外気の通風方向を示す図である。
【0035】
また、図3は、第一及び第二の熱交換器のチューブ高さの比と、第二の熱交換器の放熱量との関係を示す図である。
【0036】
図3に示すように、hr/hc>1以上、すなわち、通風方向の風上側に設置したコンデンサのチューブの高さが、通風方向の風下側に設置したラジエータのチューブの高さよりも小さくなると第二の熱交換器の放熱量の比は,向上する。図3中、B点は,第一の熱交換器のチューブ高さhc’と第二の熱交換器のチューブ高さhr’の関係がhc’=hr’の関係にある点を示している。
【0037】
また、図3中A点は、第一及び第二の熱交換器のチューブ3,4の高さの関係が、本例に示すhr/hc>1の関係を示している。
また、図3中C点は、第一及び第二の熱交換器のチューブの高さの関係がhr/hc<1の関係を示している。
【0038】
各熱交換器1,2を構成するチューブ3,4は、熱交換性能及び熱交換器の軽量化を考慮し、各チューブ3,4の高さは、1.6mm未満となることが望ましい。とりわけ、第一の熱交換器が本例のようなコンデンサの場合は、そのチューブ高さが1.3mm以下となるように寸法設定すると、熱交換効率が更に向上し、熱交換器の小型化、軽量化が一層可能となるものである。
【0039】
したがって、本例においては、基本的には hc<hr<1.6mmを満たすように熱交換器1,2にチューブ3,4を形成している。
【0040】
前記不等式を満たすチューブを用いて第一及び第二の熱交換器を形成することにより、設置スペースの拡大を図ることなく、第二の熱交換器の熱交換性能を従来よりも向上できる。
【0041】
車内空調用の熱交換サイクルに用いるコンデンサ及びエンジン冷却用のラジエータは、エンジンルームに通風方向に対して直交するように並列に配置される。
【0042】
本例のように、第一の熱交換器であるコンデンサのチューブ高さが、第二の熱交換器であるラジエータのチューブ高さよりも小さく構成されていると、第一の熱交換器によって、第二の熱交換器の熱交換性能を妨げることなく、要求される高い熱交換性能を得ることができる。
【0043】
【発明の効果】
以上説明したように、本発明は、通風方向の風上側乃至風下側に通風方向に対して直交するように並列配置された二以上の熱交換器において、前記熱交換器は、複数のチューブを積層してなるものであって、通風方向の風上側に配置された一の熱交換器と、風下側に配置された他の熱交換器は、異なる熱媒体が用いられるものであり、通風方向の風上側に配置された前記一の熱交換器のチューブの高さは、風下側に配置された前記他の熱交換器のチューブの高さよりも小さく構成した熱交換器である。
【0044】
このように、通風方向に対して直交するように並列に二以上の熱交換器を配置する場合、風上側の熱交換器のチューブの高さを、風下側に配置する熱交換器のチューブの高さよりも小さくすると、前記熱交換器のチューブ及びフィン間を通流する外気は、風上側に配置した熱交換器のチューブに阻まれることなく、風下側に設置した熱交換器のチューブ面を通流する。したがって、高温の媒体が通流するチューブから放熱が行われ、風下側に配置した第二の熱交換器の熱交換性能を維持できる。
【0045】
また、前記並列配置された二以上の各熱交換器のチューブは、チューブの積層間隔が略同一であっても、第一の熱交換器を構成するチューブの高さが、第二の熱交換器を構成するチューブの高さよりも小さくなるため、第二の熱交換器に対する外気の通風を妨げず、外気が、第二の熱交換器を構成するチューブ面に到達するため、第二の熱交換器の熱交換性能を維持できる。
【0046】
また、前記熱交換器のチューブの高さを1.6mm未満とすると、熱交換効率が向上し、熱交換器の軽量化を図ることができる。とりわけ、第一の熱交換器がコンデンサの場合は、そのチューブ高さが1.3mm以下となるように寸法設定すると、熱交換効率が更に向上し、熱交換器の小型化、軽量化が一層可能となるものである。
【0047】
また、本発明は、第二の熱交換器の熱交換性能を維持できるため、並列に配置する熱交換器の間隔を15mm以下に設定でき、熱交換器の設置スペースを低減できる。
【0048】
また、通風方向に対して直交するように並列に配置した熱交換器は、一の熱交換器は、コンデンサであり、他の熱交換器はラジエータである。
【0049】
高い熱交換性能が要求される、空調用の熱交換サイクルを構成するコンデンサと、エンジンを冷却するラジエータであっても、要求される熱交換性能を満たして、二つの熱交換器を並列に配置できる。
【0050】
また、前記二以上の熱交換器は、共通の部材を用いて一体的に構成しているので、熱交換器の軽量化が図られ、設置スペースを拡大することなく、エンジンルーム内等における取り付けの容易化を図ることができるものである。
【0051】
【図面の簡単な説明】
【図1】本発明の具体例に係り、第一及び第二の熱交換器の概略構成を示す斜視図である。
【図2】本発明の具体例に係り、図1の熱交換器の一部断面を示す図である。
【図3】本発明の具体例に係り、第一及び第二の熱交換器を構成するチューブ高さの比と第二の熱交換器の放熱量の比の関係を示す図である。
【図4】従来例に係り、第一及び第二の熱交換器の一部断面を示す図である。
【符号の説明】
1 第一の熱交換器
2 第二の熱交換器
3 チューブ
4 チューブ
5 フィン
6 フィン
7 ヘッダタンク
8 ヘッダタンク
9 ヘッダタンク
10 ヘッダタンク
11 ルーバ
12 ルーバ
13 チューブ
14 チューブ
15 ブラケット
K 間隔
hc 第一の熱交換器のチューブの高さ
hr 第二の熱交換器のチューブの高さ
hc’ 第一の熱交換器のチューブの高さ
hr’ 第二の熱交換器のチューブの高さ
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a heat exchanger in which two or more heat exchangers having different uses are combined.
[0002]
[Prior art]
Conventionally, for example, as a heat exchanger used for a vehicle, a heat exchanger in which two or more heat exchangers having different actions are combined is used.
[0003]
For example, Japanese Patent Laid-Open No. 10-306994 discloses an invention of a heat exchanger in which a radiator core portion of an engine and a condenser core portion of a vehicle air conditioner are integrally configured. Japanese Patent Application Laid-Open No. 10-253276 discloses a necessary one of two heat exchangers formed integrally, paying attention to the ratio of the fin width and the number of louvers arranged between the tubes of the condenser core portion and the radiator core portion. A heat exchanger with a small heat dissipation amount has a smaller ratio between the fin width and the number of louvers, and a heat exchanger with a large heat dissipation amount has a ratio between the fin width and the number of louvers than a heat exchanger with a small heat dissipation amount. The heat exchanger is configured so as to be large.
[0004]
JP-A-10-170184 discloses a louver shape formed on a fin attached to one heat exchanger, focusing on a louver shape formed on a fin attached between tubes of two heat exchangers, The heat exchange efficiency of the two heat exchangers is improved by changing the shape of the louver formed on the fins attached to the other heat exchangers.
[0005]
[Problems to be solved by the invention]
When two or more heat exchangers are arranged in parallel with the ventilation direction as in the invention described in the publication, for example, when two or more heat exchangers are mounted on a vehicle, the windward side with respect to the ventilation direction Therefore, it is difficult to maintain the heat exchange performance of the heat exchanger arranged on the leeward side.
[0006]
That is, as shown in FIG. 4, if the height hc ′ of the tube 13 constituting the first heat exchanger and the height hr ′ of the tube 14 constituting the second heat exchanger are the same, the ventilation Due to the presence of the tube 13 of the first heat exchanger installed on the windward side in the direction, the air passing through the tube 13 of the first heat exchanger decreases in wind speed and then spreads on the downstream side, The surface of the tube 14 of the second heat exchanger and the vicinity of the fin 6 tube become portions where the wind speed is reduced, and the heat exchange performance of the second heat exchanger is significantly reduced.
[0007]
Moreover, in order to mount a heat exchanger in an engine room where installation space is limited, the first and second heat exchangers must be as close as possible, and in addition, weight reduction should be achieved. Is also required.
[0008]
In particular, when the tube is installed so as to be orthogonal to the ventilation direction, outside air does not contact the tube surface of the second heat exchanger through which the high-temperature medium flows, and the heat exchange performance is hindered. In particular, when the pitches of the tubes constituting the first and second heat exchangers are the same, outside air is not passed through the tube surfaces constituting the second heat exchanger, and the second heat exchanger The amount of heat released becomes extremely low.
[0009]
Therefore, the present invention has been made in view of the above problems, and in two or more heat exchangers installed in parallel so as to be orthogonal to the ventilation direction, the heat exchange performance of the leeward heat exchanger is maintained. It aims at providing the heat exchanger which enables this.
[0010]
[Means for Solving the Problems]
The invention described in claim 1 of the present application is the two or more heat exchangers arranged in parallel so as to be orthogonal to the ventilation direction on the windward side or the leeward side of the ventilation direction, wherein the heat exchanger includes a plurality of tubes. The one heat exchanger arranged on the windward side in the ventilation direction and the other heat exchanger arranged on the leeward side use different heat media. the height of the direction of the windward arranged the one heat exchanger to the side tube is a heat exchanger configured smaller than the height of the leeward of the other heat exchanger disposed on the side of the tube.
[0011]
Thus, when two or more heat exchangers are arranged in parallel so as to be orthogonal to the ventilation direction, the height of the tube of the heat exchanger on the windward side is the height of the tube of the heat exchanger arranged on the leeward side. When the height is smaller than the height, the outside air flowing between the tubes and fins of the heat exchanger is not blocked by the heat exchanger tubes arranged on the leeward side, and the tube surface of the heat exchanger installed on the leeward side is not blocked. Circulate. Therefore, heat is radiated from the tube through which the high-temperature medium flows, and the heat exchange performance of the second heat exchanger disposed on the leeward side can be maintained.
[0012]
The invention described in claim 2 of the present application is that, in the invention of claim 1, the tubes of the two or more heat exchangers arranged in parallel have substantially the same stacking interval of the tubes , and ventilation The height of the fins of the one heat exchanger disposed on the leeward side of the direction is a heat exchanger configured to be smaller than the height of the fins of the other heat exchanger disposed on the leeward side .
[0013]
For example, when the first heat exchanger and the second heat exchanger are installed in parallel so as to be orthogonal to the ventilation direction, in particular, the first heat exchanger and the second heat exchanger are configured. If the tube stacking interval is the same and each tube height is the same, or if the tube height of the first heat exchanger is high, this is due to the presence of the tube of the first heat exchanger that is the upwind side in the ventilation direction. The outside air that has passed through the tube of the first heat exchanger has a reduced wind speed, then spreads on the downstream side, and the surface of the tube of the second heat exchanger and the vicinity of the fin tube become a wind speed reduced portion, The heat exchange performance of the second heat exchanger will be significantly reduced.
[0014]
In this claim , the height of the fin of the one heat exchanger arranged on the windward side in the ventilation direction is smaller than the height of the fin of the other heat exchanger arranged on the leeward side, and Even when the stacking intervals of the tubes constituting the first and second heat exchangers are substantially the same, the height of the tubes constituting the first heat exchanger constitutes the second heat exchanger. Because it is lower than the height of the tube, the outside air is not obstructed, and this outside air reaches the tube surface constituting the second heat exchanger, so the heat exchange performance of the second heat exchanger is maintained. it can be.
[0015]
The invention described in claim 3 of the present application is the invention according to claim 1 or 2, wherein the height of each tube constituting the heat exchanger is less than 1.6 mm.
[0016]
It is desirable that the tube constituting the heat exchanger has a tube height of less than 1.6 mm in consideration of the heat exchange efficiency of the heat exchanger and its weight reduction. In particular, when the first heat exchanger is a condenser, setting the dimensions so that the tube height is 1.3 mm or less will further improve the heat exchange efficiency and further reduce the size and weight of the heat exchanger. It will be.
[0017]
The invention described in claim 4 of the present application is the invention of any one of claims 1 to 3, wherein the interval between the two or more heat exchangers arranged in parallel is 15 mm or less.
[0018]
For example, when installing the first and second heat exchangers in the engine room, the first and second heat exchangers installed in parallel should be provided as close as possible to reduce the installation space. Is desirable. On the other hand, when the first and second heat exchangers are arranged close to each other, the first heat exchanger installed on the upwind side in the ventilation direction prevents outside air flowing through the second heat exchanger, The heat exchange performance of the heat exchanger installed on the leeward side in the ventilation direction cannot be maintained.
[0019]
As in the present invention, the height of the tube constituting the heat exchanger installed on the leeward side is set smaller than the height of the tube constituting the heat exchanger installed on the leeward side. Even when the distance between the two heat exchangers is arranged as close as 15 mm, the heat exchange performance of the second heat exchanger is maintained.
[0020]
In the invention described in claim 5 of the present application, in the invention of any one of claims 1 to 4, one heat exchanger is a condenser, and the other heat exchanger is a radiator.
[0021]
That is, in many cases, a heat exchanger mounted in an engine room is installed close to a condenser that constitutes a heat exchange cycle for air conditioning, which requires high heat exchange performance, and a radiator that cools the engine.
[0022]
In the invention described in claim 6 of the present application, in the invention of any one of claims 1 to 5, the two or more heat exchangers are integrally configured using a common member.
[0023]
If the two or more heat exchangers are configured integrally using a common member, for example, a bracket, the heat exchanger can be reduced in weight, and can be easily installed in the engine room or the like without increasing the installation space.
[0024]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is a perspective view showing a schematic configuration of this example.
[0025]
As shown in FIG. 1, in the heat exchanger of this example, the first and second heat exchangers 1 and 2 are arranged in parallel to the ventilation direction.
[0026]
In addition, each heat exchanger 1, 2 has fins 5, 6 mounted between the tubes 3, 4 in order to expand the heat radiation area with the plurality of tubes 3, 4. Are stacked, and both ends of the tubes 3 and 4 are connected to the header tanks 7, 8, 9 and 10, respectively. The heat exchange medium is distributed between the tubes 3 and 4 from the header tanks 7 and 8 and flows therethrough, and heat is generated so that the high-temperature medium becomes a low-temperature medium by heat radiation from the tubes 3 and 4 and the fins 5 and 6. We are exchanging.
[0027]
In addition, the arrow in a figure has shown the ventilation direction of external air.
[0028]
Moreover, the 1st and 2nd heat exchangers 1 and 2 of this example are hold | maintained using the common member, and are comprised integrally. In this example, the bracket 15 is used to hold the first and second heat exchangers 1 and 2 with bolts. Specifically, two brackets 15 are arranged on the upper and lower end plates of both heat exchangers at the upper and lower portions, and bolts are inserted and fixed in the front-rear direction. When the first and second heat exchangers are configured integrally with a common member in this way, the brackets that are individually provided in the respective heat exchangers become unnecessary due to the common use of the members. Can be reduced in weight and can be easily installed in the engine room.
[0029]
In this example, a condenser of a vehicle air conditioner that is the first heat exchanger 1 is installed on the windward side of the ventilation direction, and an engine radiator that is the second heat exchanger 2 is installed on the leeward side of the ventilation direction. Yes.
[0030]
In the heat exchangers 1 and 2 of this example, the distance K between the condenser which is the first heat exchanger 1 and the radiator which is the second heat exchanger 2 is 15 mm in order to reduce the installation space. In particular, when mounting on a vehicle, it is important to reduce the installation space.
[0031]
Thus, when the space | interval of the 1st heat exchanger 1 and the 2nd heat exchanger 2 is provided closely, by the 1st heat exchanger 1 installed in the windward side of the ventilation direction, external air This prevents the outside air from flowing through the second heat exchanger 2, particularly the surface of the tube 4 through which the medium flows, and the desired heat exchange performance cannot be obtained.
[0032]
Therefore, in this example, the tube height hc constituting the first heat exchanger 1 arranged in parallel so as to be orthogonal to the ventilation direction is set to be higher than the tube height hr constituting the second heat exchanger 2. Is also small.
[0033]
That is, the heights of the tubes constituting the first and second heat exchangers arranged in parallel perpendicular to the ventilation direction have a relationship of hc <hr.
[0034]
FIG. 2 is a partial cross-sectional view of the first and second heat exchangers 1 and 2 showing the tubes 3 and 4 and the fins 5 and 6. In the figure, 11 and 12 are louvers formed on the fins 5 and 6. In addition, the arrow in a figure is a figure which shows the ventilation direction of external air.
[0035]
Moreover, FIG. 3 is a figure which shows the relationship between ratio of the tube height of a 1st and 2nd heat exchanger, and the thermal radiation amount of a 2nd heat exchanger.
[0036]
As shown in FIG. 3, when hr / hc> 1 or more, that is, when the height of the condenser tube installed on the windward side in the ventilation direction becomes smaller than the height of the radiator tube installed on the leeward side in the ventilation direction, The ratio of heat dissipation of the second heat exchanger is improved. In FIG. 3, point B indicates that the relationship between the tube height hc ′ of the first heat exchanger and the tube height hr ′ of the second heat exchanger is in a relationship of hc ′ = hr ′. .
[0037]
Moreover, the point A in FIG. 3 has shown the relationship of the height of the tubes 3 and 4 of the 1st and 2nd heat exchanger of the relationship of hr / hc> 1 shown in this example.
Moreover, the C point in FIG. 3 has shown the relationship of hr / hc <1 in the relationship of the height of the tube of a 1st and 2nd heat exchanger.
[0038]
In consideration of heat exchange performance and weight reduction of the heat exchanger, it is desirable that the height of each of the tubes 3 and 4 be less than 1.6 mm. In particular, in the case where the first heat exchanger is a condenser as in this example, the heat exchange efficiency is further improved and the heat exchanger is reduced in size by setting the tube height to be 1.3 mm or less. Thus, the weight can be further reduced.
[0039]
Therefore, in this example, the tubes 3 and 4 are basically formed in the heat exchangers 1 and 2 so as to satisfy hc <hr <1.6 mm.
[0040]
By forming the first and second heat exchangers using tubes that satisfy the inequality, the heat exchange performance of the second heat exchanger can be improved as compared with the conventional one without increasing the installation space.
[0041]
The condenser used for the heat exchange cycle for in-vehicle air conditioning and the radiator for cooling the engine are arranged in parallel in the engine room so as to be orthogonal to the ventilation direction.
[0042]
As in this example, when the tube height of the condenser that is the first heat exchanger is configured to be smaller than the tube height of the radiator that is the second heat exchanger, by the first heat exchanger, The required high heat exchange performance can be obtained without interfering with the heat exchange performance of the second heat exchanger.
[0043]
【The invention's effect】
As described above, the present invention relates to two or more heat exchangers arranged in parallel so as to be orthogonal to the ventilation direction from the windward side to the leeward side of the ventilation direction, wherein the heat exchanger includes a plurality of tubes. One heat exchanger arranged on the windward side in the ventilation direction and the other heat exchanger arranged on the leeward side use different heat media, and are in the direction of ventilation. windward side arranged a height of the one of the heat exchanger tube is a heat exchanger configured smaller than the height of the leeward of the other heat exchanger disposed on the side of the tube.
[0044]
Thus, when two or more heat exchangers are arranged in parallel so as to be orthogonal to the ventilation direction, the height of the tube of the heat exchanger on the windward side is the height of the tube of the heat exchanger arranged on the leeward side. When the height is smaller than the height, the outside air flowing between the tubes and fins of the heat exchanger is not blocked by the heat exchanger tubes arranged on the leeward side, and the tube surface of the heat exchanger installed on the leeward side is not blocked. Circulate. Therefore, heat is radiated from the tube through which the high-temperature medium flows, and the heat exchange performance of the second heat exchanger disposed on the leeward side can be maintained.
[0045]
Further, the tubes of the two or more heat exchangers arranged in parallel may have the same height as the second heat exchange even if the stacking interval of the tubes is substantially the same. Since it is smaller than the height of the tube constituting the heat exchanger, the outside air does not interfere with the ventilation of the second heat exchanger, and the outside air reaches the tube surface constituting the second heat exchanger. The heat exchange performance of the exchanger can be maintained.
[0046]
Moreover, when the height of the tube of the heat exchanger is less than 1.6 mm, the heat exchange efficiency is improved and the weight of the heat exchanger can be reduced. In particular, if the first heat exchanger is a condenser, setting the dimensions so that the tube height is 1.3 mm or less further improves the heat exchange efficiency, further reducing the size and weight of the heat exchanger. It is possible.
[0047]
Moreover, since this invention can maintain the heat exchange performance of a 2nd heat exchanger, the space | interval of the heat exchanger arrange | positioned in parallel can be set to 15 mm or less, and the installation space of a heat exchanger can be reduced.
[0048]
In the heat exchangers arranged in parallel so as to be orthogonal to the ventilation direction, one heat exchanger is a condenser and the other heat exchanger is a radiator.
[0049]
Capacitors that make up a heat exchange cycle for air conditioning that requires high heat exchange performance and a radiator that cools the engine satisfy the required heat exchange performance and arrange two heat exchangers in parallel it can.
[0050]
In addition, since the two or more heat exchangers are integrally configured using a common member, the heat exchanger can be reduced in weight and installed in an engine room or the like without increasing the installation space. Can be facilitated.
[0051]
[Brief description of the drawings]
FIG. 1 is a perspective view showing a schematic configuration of first and second heat exchangers according to a specific example of the present invention.
FIG. 2 is a diagram showing a partial cross section of the heat exchanger of FIG. 1 according to a specific example of the present invention.
FIG. 3 is a diagram illustrating the relationship between the ratio of the height of tubes constituting the first and second heat exchangers and the ratio of the heat dissipation amount of the second heat exchanger according to a specific example of the present invention.
FIG. 4 is a diagram showing a partial cross section of the first and second heat exchangers according to a conventional example.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 1st heat exchanger 2 2nd heat exchanger 3 Tube 4 Tube 5 Fin 6 Fin 7 Header tank 8 Header tank 9 Header tank 10 Header tank 11 Louver 12 Louver 13 Tube 14 Tube 15 Bracket K Space | interval hc 1st Heat exchanger tube height hr Second heat exchanger tube height hc 'First heat exchanger tube height hr' Second heat exchanger tube height

Claims (6)

通風方向の風上側乃至風下側に通風方向に対して直交するように並列配置された二以上の熱交換器において、
前記熱交換器は、複数のチューブを積層してなるものであって、
通風方向の風上側に配置された一の熱交換器と、風下側に配置された他の熱交換器は、異なる熱媒体が用いられるものであり、
通風方向の風上側に配置された前記一の熱交換器のチューブの高さは、風下側に配置された前記他の熱交換器のチューブの高さよりも小さいことを特徴とする熱交換器。
In two or more heat exchangers arranged in parallel so as to be orthogonal to the ventilation direction on the windward side or the leeward side of the ventilation direction,
The heat exchanger is formed by laminating a plurality of tubes,
One heat exchanger arranged on the windward side in the ventilation direction and the other heat exchanger arranged on the leeward side use different heat media,
The height of the ventilating direction of the windward arranged the one heat exchanger to the side of the tube, the heat exchanger being less than the height of the other heat exchanger tube disposed downwind.
前記並列に配置された二以上の各熱交換器の各チューブは、チューブの積層間隔が略同一であるとともに、通風方向の風上側に配置された前記一の熱交換器のフィンの高さは、風下側に配置された前記他の熱交換器のフィンの高さよりも小さいことを特徴とする前記請求項1記載の熱交換器。The tubes of the two or more heat exchangers arranged in parallel have substantially the same stacking interval , and the height of the fins of the one heat exchanger arranged on the windward side in the ventilation direction is The heat exchanger according to claim 1, wherein the heat exchanger is smaller than a fin height of the other heat exchanger disposed on the leeward side . 前記各チューブの高さは、1.6mm未満であることを特徴とする前記請求項1又は2いずれか記載の熱交換器。The heat exchanger according to claim 1 or 2, wherein the height of each tube is less than 1.6 mm. 前記並列に配置された二以上の各熱交換器の間隔は、15mm以下であることを特徴とする前記請求項1乃至3いずれか記載の熱交換器。4. The heat exchanger according to claim 1, wherein an interval between the two or more heat exchangers arranged in parallel is 15 mm or less. 5. 前記熱交換器は、一の熱交換器は、コンデンサであり、他の熱交換器はラジエータであることを特徴とする前記請求項1乃至4いずれか記載の熱交換器。5. The heat exchanger according to claim 1, wherein one heat exchanger is a condenser, and the other heat exchanger is a radiator. 前記二以上の熱交換器は、共通の部材を用いて一体的に構成したことを特徴とする前記請求項1乃至5いずれか記載の熱交換器。The heat exchanger according to any one of claims 1 to 5, wherein the two or more heat exchangers are integrally formed using a common member.
JP20435499A 1999-07-19 1999-07-19 Heat exchanger Expired - Fee Related JP3625259B2 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP20435499A JP3625259B2 (en) 1999-07-19 1999-07-19 Heat exchanger
DE60040620T DE60040620D1 (en) 1999-07-19 2000-03-29 VEHICLE COMPRISING TWO HEAT EXCHANGERS
EP00912901A EP1256771B1 (en) 1999-07-19 2000-03-29 Vehicle incorporating two heat exchangers
PCT/JP2000/001935 WO2001006194A1 (en) 1999-07-19 2000-03-29 Heat exchanger

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP20435499A JP3625259B2 (en) 1999-07-19 1999-07-19 Heat exchanger

Publications (2)

Publication Number Publication Date
JP2001033193A JP2001033193A (en) 2001-02-09
JP3625259B2 true JP3625259B2 (en) 2005-03-02

Family

ID=16489128

Family Applications (1)

Application Number Title Priority Date Filing Date
JP20435499A Expired - Fee Related JP3625259B2 (en) 1999-07-19 1999-07-19 Heat exchanger

Country Status (4)

Country Link
EP (1) EP1256771B1 (en)
JP (1) JP3625259B2 (en)
DE (1) DE60040620D1 (en)
WO (1) WO2001006194A1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4420689B2 (en) * 2004-01-29 2010-02-24 株式会社ヴァレオサーマルシステムズ Automobile front structure
JP2008039322A (en) * 2006-08-08 2008-02-21 Univ Of Tokyo Heat exchanger and heat exchange apparatus having the same
US8196646B2 (en) 2008-12-15 2012-06-12 Delphi Technologies, Inc. Heat exchanger assembly
JP7047361B2 (en) * 2017-12-08 2022-04-05 株式会社デンソー Heat exchanger

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58108394A (en) * 1981-12-21 1983-06-28 Hitachi Ltd Heat exchanger
US5529116A (en) * 1989-08-23 1996-06-25 Showa Aluminum Corporation Duplex heat exchanger
DE4327213C2 (en) * 1993-08-13 1997-12-11 Ruecker Gmbh Recuperative heat exchangers, in particular coolers for motor vehicles
EP0773419B1 (en) * 1995-11-13 2003-02-05 Denso Corporation Heat exchanger
US5730213A (en) * 1995-11-13 1998-03-24 Alliedsignal, Inc. Cooling tube for heat exchanger
JP3855346B2 (en) * 1997-03-17 2006-12-06 株式会社デンソー Heat exchanger
JPH1194485A (en) * 1997-09-19 1999-04-09 Denso Corp Duplex heat exchanger
JPH11148795A (en) * 1997-11-14 1999-06-02 Toyo Radiator Co Ltd Combined heat exchanger
JPH11218396A (en) * 1997-11-28 1999-08-10 Zexel:Kk Parallel installation integrated type heat exchanger and manufacture thereof

Also Published As

Publication number Publication date
DE60040620D1 (en) 2008-12-04
EP1256771A4 (en) 2005-11-09
WO2001006194A1 (en) 2001-01-25
JP2001033193A (en) 2001-02-09
EP1256771A1 (en) 2002-11-13
EP1256771B1 (en) 2008-10-22

Similar Documents

Publication Publication Date Title
US6213196B1 (en) Double heat exchanger for vehicle air conditioner
US6889757B2 (en) Core structure of integral heat-exchanger
JP2000346578A (en) Duplex type heat exchanger
US20130153174A1 (en) Microchannel heat exchanger fin
JP5803768B2 (en) Heat exchanger fins and heat exchangers
JP2005106328A (en) Heat exchanging device
JP2004299609A (en) Heat exchanging apparatus for vehicle
JP3625259B2 (en) Heat exchanger
JP3214373B2 (en) Flat heat transfer tube
JP4690605B2 (en) Corrugated fin heat exchanger
JPH0452498A (en) Double heat exchanger
JP4173959B2 (en) Integrated heat exchanger core structure
JP3861787B2 (en) Composite heat exchanger and automobile equipped with the same
JP2005061648A (en) Heat exchanger
JP4397676B2 (en) Automotive heat exchanger
JPH0257421A (en) Heat exchanger for vehicle
CN215810372U (en) Plate-fin heat exchanger capable of improving heat dissipation effect
JP2005003350A (en) Heat exchanger fin, heat exchanger, condenser and evaporator
JP2005140454A (en) Heat exchanger
JP2006015980A (en) Ventilation structure of heat exchanger for heat radiation of vehicle
JPH0560483A (en) Oil cooler
JPS6152589A (en) Air-to-air heat exchanger
JP3133057B2 (en) Corrugated fin for heat exchanger
JP2009186108A (en) Heat exchanger
JP2008087747A (en) Heat exchanger for vehicle

Legal Events

Date Code Title Description
A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20040309

RD01 Notification of change of attorney

Free format text: JAPANESE INTERMEDIATE CODE: A7426

Effective date: 20040428

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20040430

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A821

Effective date: 20040430

RD02 Notification of acceptance of power of attorney

Free format text: JAPANESE INTERMEDIATE CODE: A7422

Effective date: 20040607

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20041102

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20041126

R150 Certificate of patent or registration of utility model

Ref document number: 3625259

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150

Free format text: JAPANESE INTERMEDIATE CODE: R150

S533 Written request for registration of change of name

Free format text: JAPANESE INTERMEDIATE CODE: R313533

R350 Written notification of registration of transfer

Free format text: JAPANESE INTERMEDIATE CODE: R350

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20071210

Year of fee payment: 3

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20081210

Year of fee payment: 4

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20081210

Year of fee payment: 4

S533 Written request for registration of change of name

Free format text: JAPANESE INTERMEDIATE CODE: R313533

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20081210

Year of fee payment: 4

R350 Written notification of registration of transfer

Free format text: JAPANESE INTERMEDIATE CODE: R350

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20091210

Year of fee payment: 5

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20101210

Year of fee payment: 6

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20101210

Year of fee payment: 6

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20111210

Year of fee payment: 7

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20111210

Year of fee payment: 7

S533 Written request for registration of change of name

Free format text: JAPANESE INTERMEDIATE CODE: R313533

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20111210

Year of fee payment: 7

R350 Written notification of registration of transfer

Free format text: JAPANESE INTERMEDIATE CODE: R350

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20121210

Year of fee payment: 8

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20131210

Year of fee payment: 9

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

S111 Request for change of ownership or part of ownership

Free format text: JAPANESE INTERMEDIATE CODE: R313117

R350 Written notification of registration of transfer

Free format text: JAPANESE INTERMEDIATE CODE: R350

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

LAPS Cancellation because of no payment of annual fees