JP2003130567A - Heat exchanger - Google Patents
Heat exchangerInfo
- Publication number
- JP2003130567A JP2003130567A JP2001321798A JP2001321798A JP2003130567A JP 2003130567 A JP2003130567 A JP 2003130567A JP 2001321798 A JP2001321798 A JP 2001321798A JP 2001321798 A JP2001321798 A JP 2001321798A JP 2003130567 A JP2003130567 A JP 2003130567A
- Authority
- JP
- Japan
- Prior art keywords
- heat transfer
- heat
- heat exchanger
- slit
- fins
- 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.)
- Granted
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
- F28F1/24—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 transversely
- F28F1/32—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 transversely the means having portions engaging further tubular elements
- F28F1/325—Fins with openings
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Geometry (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
Description
【発明の詳細な説明】
【０００１】
【発明の属する技術分野】本発明は、熱交換器に係り、
特に、伝熱フィンを備えた熱交換器に関する。
【０００２】
【従来の技術】熱交換器として、平行に配列された複数
枚の伝熱フィンと、この伝熱フィンに直交させて配設さ
れた伝熱管とで形成されたクロスフィンチューブ型のも
のが知られている。このような熱交換器は、伝熱管内を
通流する熱媒（又は冷媒）と伝熱フィン間を通流する気
流との熱交換を行うもので、伝熱フィンには、熱交換量
を増やすためにスリットや切り起こしルーバー（以下、
スリットと総称する）などが形成されている。
【０００３】ところが、冬の暖房時に、伝熱フィン間を
通流する外気の熱が奪われて外気中の水分が凝縮し、ス
リット部分に霜が付着することがある。このように伝熱
フィンに霜が付着すると、熱交換器を通流する風量が減
少するため、かえって交換熱量が減少する場合がある。
このような問題を解決するものとして、特開平2-166392
号公報に記載のように、伝熱フィンの一部にスリットを
設けないフラット部を形成し、スリットの着霜時に一定
の風量をフラット部に通流させるようにして、熱交換器
の熱交換量の低下を抑制することが提案されている。
【０００４】
【発明が解決しようとする課題】しかしながら、上記従
来技術においては、フラット部の配置に配慮がなされて
いないためスリット部とフラット部との気流のバランス
が悪いという問題がある。すなわち、フラット部の通風
抵抗は、スリットが設けられている部分に比べて低い。
このため、スリット部を流れる空気量がフラット部に比
べて少なくなりすぎると、全体として熱交換器の熱交換
量が低下してしまうことになる。
【０００５】本発明の課題は、スリット部とフラット部
を設けた熱交換器の熱交換量の低下を抑制することにあ
る。
【０００６】
【課題を解決するための手段】本発明の熱交換器は、上
記課題を解決するために、平行に配列された複数枚の伝
熱フィンと、この伝熱フィンに直交させて配設された伝
熱管とを備え、伝熱管は上下方向に複数段、かつ水平方
向に複数列設けられ、伝熱フィンは、上下端部の伝熱面
及び少なくとも上下に隣り合う伝熱管の間の伝熱面に、
スリット又はルーバが形成された第1の部分とスリット
又はルーバが形成されていない第2の部分とを有し、水
平方向に隣り合う列の第2の部分は互いに上下方向に伝
熱管の段間の距離以上ずらして形成されてなることを特
徴とする。
【０００７】すなわち、本発明は、伝熱フィンに沿って
水平に流れる気流の流れ方向に対して、前列のフラット
部の位置と後列のフラット部の位置とを上下方向にずら
すことにより、気流の流れを曲げてフラット部の通風抵
抗を増大させ、熱交換器全体の気流のバランスを改善し
て、熱交換量の低下を抑制するものである。
【０００８】言い換えれば、隣り合う伝熱管列のフラッ
ト部の上下方向の位置ずれを調整して、全体の通風抵抗
を調整する。これにより、風量のバランスを改善でき
る。なお、隣り合う列の伝熱管は互いに上下方向に位置
をずらして配設することができる。
【０００９】
【発明の実施の形態】以下、本発明を適用してなる熱交
換器の一実施形態について図１を参照して説明する。図
１は、本発明を適用してなる熱交換器の縦断面図であ
る。
【００１０】本実施形態の熱交換器は、図１に示すよう
に、クロスフィンチューブ型の熱交換器である。伝熱フ
ィン１は、長方形の平板からなり紙面方向に一定の間隔
で複数枚並べられている。それぞれの伝熱フィン１に
は、複数の穴３が設けられ、穴３は、上下方向に複数
（図示例では４段）、図において左右方向（気流の流れ
方向）に複数列（図示例では２列）に配列されている。
また、図示矢印６で示す気流の流れ方向に対して、前列
の穴３と後列の穴３とは互いに上下方向に位置をずらし
て配置されている。それぞれの穴３には伝熱管５が挿入
されている。それぞれの伝熱管５は図示していない連結
管で連結され、１本の冷媒流路が形成されている。
【００１１】伝熱フィン１の伝熱面には、スリットが形
成されたスリット部９と、スリットが形成されていない
フラット部８Ａ、８Ｂが設けられている。スリット部９
は、上下方向に伸びるスリットを、気流方向に複数並べ
て伝熱面に配列して形成されている。また、スリット部
９は、上下方向に隣り合う伝熱管５に挟まれる領域の伝
熱面と、一定の広がりを有する伝熱面が形成される上下
方向の端部に設けられている。本実施形態では、前列の
最下段の伝熱管５とその上の伝熱管５の間の伝熱面にス
リットが形成されていないフラット部８Ａが設けられ、
後列の最上段の伝熱管５の上部の伝熱面にスリットが形
成されていないフラット部８Ｂが設けられている。な
お、前列と後列の伝熱管５に挟まれる伝熱面の中央部分
は、上下方向全域にわたってスリットが形成されていな
いフラット領域１１となっている。
【００１２】このように構成される実施形態の熱交換器
の動作について以下に説明する。熱交換器に通流する空
気は、前列側から後列側に向かって伝熱フィン１の伝熱
面に沿って流れ、伝熱フィン１と伝熱管５を介して、伝
熱管５内を流れる冷媒と熱交換を行なう。スリット部９
に着霜していない通常状態のとき、空気の通風抵抗はフ
ラット部８Ａ、８Ｂよりもスリット部９が若干大きいた
め、その分だけフラット部８Ａ、８Ｂに流れる空気量が
多くなる。しかし、本実施形態では、前列側と後列側の
フラット部８Ａ，８Ｂの位置を高さ方向にずらしている
ことから、前列のフラット部８Ａから流出する気流は、
後列側の通風抵抗が大きいスリット部９に流入し、その
流れが妨げられることになる。その結果、前列側のフラ
ット部８Ａから流出する気流の一部は、流れの向き変え
て他のスリット部９及び後列側のフラット部８Ｂに流入
することになる。この流れの向き変えるときの圧力損失
によって、伝熱フィン１の上下方向にわたる通風抵抗の
バランス、ひいては風量のバランスが改善される。
【００１３】特に、冬季の暖房時に、スリット部９に着
霜すると、スリット部９の通風抵抗が増大するので、従
来のように前列側のフラット部と後列側のフラット部の
高さ位置が同じ又は高さ方向に重なる部分があると、フ
ラット部を流れる風量が多くなりすぎ、熱交換器全体と
しての熱交換量が低下する。この点、本実施形態によれ
ば、前列側と後列側のフラット部８Ａ，８Ｂの位置を高
さ方向にずらしていることから、フラット部８Ａ、８Ｂ
を流れる風量の増大を抑えて、伝熱フィン１の上下方向
にわたる風量のバランスを図ることができ、熱交換器全
体としての熱交換量の低下を改善することができる。
【００１４】また、前列側と後列側のフラット部８Ａ，
８Ｂの数、及び高さ方向の位置ずれ量を適宜調整するこ
とにより、伝熱フィン１の上下方向にわたる風量のバラ
ンスを調整することができる。
【００１５】図１に示す実施形態では、スリット部９
は、上下方向に複数並べられたスリットで形成されてい
るものについて説明した。本発明はこれに限らず、例え
ば、図２及び図４に示すように、中間部分にフラット面
が設けられたスリット部１０、１４や、図３に示すよう
に、上流側から下流側にかけてスリットの数や面積が増
加するように形成されたスリット部１２など、さまざま
な公知の形状のスリットを用いることができる。また、
図１に示す実施の形態では、スリットを設けたが、ルー
バーであってもよい。
【００１６】また、図１では、伝熱管５の配置を４段と
し前後列１つずつフラット部８Ａ、８Ｂを設けた構成と
したが、伝熱管５の配置を多数の段とする場合、フラッ
ト部８Ａ、８Ｂは、同様のパターンで繰り返し上下方向
に点在するように配置する。なお、図３に示すように、
前後２列の伝熱管５が挿通する伝熱フィン１を、前列の
伝熱フィン１ａと後列の伝熱フィン１ｂで構成すること
ができる。これにより、伝熱フィン１ａを裏返すことで
１ｂとすることができるので、左右のどちらの列にも用
いることができ、製作が容易に行える。さらに、図４に
示すように、伝熱フィン１の側縁及び中央に上下方向に
延びるリブ２０を設けることで、伝熱フィン１の剛性を
高めることができるので好ましい。
【００１７】
【発明の効果】本発明によれば、熱交換器の熱交換量の
低下を抑制することができる。Description: BACKGROUND OF THE INVENTION [0001] 1. Field of the Invention [0002] The present invention relates to a heat exchanger,
In particular, it relates to a heat exchanger provided with heat transfer fins. 2. Description of the Related Art As a heat exchanger, a cross fin tube type formed by a plurality of heat transfer fins arranged in parallel and a heat transfer tube arranged orthogonally to the heat transfer fins. Things are known. Such a heat exchanger exchanges heat between a heat medium (or a refrigerant) flowing in the heat transfer tube and an airflow flowing between the heat transfer fins. To increase the number of slits and cut-out louvers (hereafter,
Slits) are formed. However, during heating in winter, the heat of the outside air flowing between the heat transfer fins is taken away, and the moisture in the outside air is condensed, and frost may adhere to the slit portion. When frost adheres to the heat transfer fins in this way, the amount of air flowing through the heat exchanger decreases, and the amount of exchanged heat may instead decrease.
To solve such a problem, Japanese Patent Application Laid-Open No. 2-166392
As described in the publication, a flat portion having no slit is formed in a part of the heat transfer fin, and a constant air flow is passed through the flat portion when the frost of the slit is formed, so that heat exchange of the heat exchanger is performed. It has been proposed to suppress the reduction in volume. [0004] However, in the above-mentioned prior art, there is a problem that the air flow between the slit portion and the flat portion is imbalanced because no consideration is given to the arrangement of the flat portion. That is, the ventilation resistance of the flat portion is lower than that of the portion where the slit is provided.
For this reason, if the amount of air flowing through the slit portion is too small compared to the flat portion, the heat exchange amount of the heat exchanger as a whole will decrease. [0005] An object of the present invention is to suppress a decrease in the amount of heat exchange of a heat exchanger provided with a slit portion and a flat portion. In order to solve the above-mentioned problems, a heat exchanger according to the present invention is provided with a plurality of heat transfer fins arranged in parallel, and arranged orthogonally to the heat transfer fins. Provided with heat transfer tubes, the heat transfer tubes are provided in a plurality of stages in the vertical direction, and in a plurality of rows in the horizontal direction, and the heat transfer fins are provided between the heat transfer surfaces at the upper and lower ends and at least the heat transfer tubes adjacent vertically. On the heat transfer surface,
It has a first portion in which a slit or louver is formed and a second portion in which no slit or louver is formed, and the second portions of rows adjacent in the horizontal direction are located vertically between heat transfer tube stages. Characterized by being shifted by more than the distance of That is, according to the present invention, the position of the flat part in the front row and the position of the flat part in the rear row are shifted in the vertical direction with respect to the flow direction of the air flow flowing horizontally along the heat transfer fins. By bending the flow, the ventilation resistance of the flat part is increased, the balance of the air flow of the entire heat exchanger is improved, and a decrease in the amount of heat exchange is suppressed. [0008] In other words, by adjusting the vertical displacement of the flat portions of the adjacent rows of heat transfer tubes, the overall ventilation resistance is adjusted. Thereby, the balance of the air volume can be improved. Note that the heat transfer tubes in adjacent rows can be arranged so as to be vertically displaced from each other. An embodiment of a heat exchanger according to the present invention will be described below with reference to FIG. FIG. 1 is a longitudinal sectional view of a heat exchanger to which the present invention is applied. As shown in FIG. 1, the heat exchanger of the present embodiment is a cross-fin tube type heat exchanger. The heat transfer fins 1 are formed of a rectangular flat plate, and a plurality of the heat transfer fins 1 are arranged at regular intervals in the paper surface direction. Each of the heat transfer fins 1 is provided with a plurality of holes 3, a plurality of holes 3 in the vertical direction (four steps in the illustrated example), and a plurality of rows (in the illustrated example, left and right directions (flow direction of the airflow)). 2 rows).
The holes 3 in the front row and the holes 3 in the rear row are arranged so as to be vertically displaced from each other with respect to the flow direction of the airflow indicated by the arrow 6 in the drawing. A heat transfer tube 5 is inserted into each hole 3. Each of the heat transfer tubes 5 is connected by a connection tube (not shown), and one refrigerant flow path is formed. The heat transfer surface of the heat transfer fin 1 is provided with a slit portion 9 having a slit and flat portions 8A and 8B having no slit. Slit part 9
Is formed by arranging a plurality of slits extending in the vertical direction in the air flow direction and arranging them on the heat transfer surface. Further, the slit portions 9 are provided at the end in the vertical direction where the heat transfer surface in a region sandwiched between the heat transfer tubes 5 adjacent in the vertical direction and the heat transfer surface having a certain spread are formed. In the present embodiment, a flat portion 8A in which no slit is formed is provided on the heat transfer surface between the lowermost heat transfer tube 5 in the front row and the heat transfer tube 5 thereabove.
A flat portion 8B in which no slit is formed is provided on the upper surface of the heat transfer tube 5 in the rearmost uppermost stage. The central part of the heat transfer surface sandwiched between the heat transfer tubes 5 in the front row and the rear row is a flat area 11 in which no slit is formed in the entire vertical direction. The operation of the heat exchanger of the embodiment configured as described above will be described below. The air flowing through the heat exchanger flows along the heat transfer surface of the heat transfer fins 1 from the front row to the rear row, and flows through the heat transfer tubes 5 via the heat transfer fins 1 and the heat transfer tubes 5. And heat exchange. Slit part 9
In the normal state where no frost is formed, the airflow resistance of the slit portion 9 is slightly larger than that of the flat portions 8A and 8B, so that the amount of air flowing through the flat portions 8A and 8B increases by that much. However, in this embodiment, since the positions of the flat portions 8A and 8B on the front row side and the rear row side are shifted in the height direction, the airflow flowing out of the front row flat sections 8A is
The air flows into the slit portion 9 where the ventilation resistance on the rear row side is large, and the flow is obstructed. As a result, a part of the airflow flowing out of the front row side flat portion 8A changes the direction of the flow and flows into the other slit portion 9 and the rear row side flat portion 8B. Due to the pressure loss when changing the direction of the flow, the balance of the ventilation resistance in the vertical direction of the heat transfer fins 1 and, consequently, the balance of the air volume are improved. In particular, when frost is formed on the slit portion 9 during heating in winter, the ventilation resistance of the slit portion 9 increases, so that the height of the flat portion on the front row and the flat portion on the rear row are the same as in the conventional case. Alternatively, if there is a portion that overlaps in the height direction, the amount of air flowing through the flat portion becomes too large, and the heat exchange amount of the entire heat exchanger decreases. In this respect, according to the present embodiment, the positions of the flat portions 8A and 8B on the front row side and the rear row side are shifted in the height direction, so that the flat sections 8A and 8B are shifted.
It is possible to suppress an increase in the amount of air flowing through the heat transfer fins 1 and balance the amount of air flowing in the vertical direction of the heat transfer fins 1, thereby improving a reduction in the amount of heat exchange of the entire heat exchanger. The front and rear row flat portions 8A, 8A,
By appropriately adjusting the number of 8B and the amount of displacement in the height direction, the balance of the air volume in the vertical direction of the heat transfer fins 1 can be adjusted. In the embodiment shown in FIG.
Has been described with a plurality of slits arranged in the vertical direction. The present invention is not limited to this. For example, as shown in FIGS. 2 and 4, slits 10 and 14 in which a flat surface is provided in an intermediate portion, and as shown in FIG. Various known shapes of slits, such as the slit portion 12 formed so as to increase the number and area of the slits, can be used. Also,
Although the slit is provided in the embodiment shown in FIG. 1, a louver may be used. In FIG. 1, the heat transfer tubes 5 are arranged in four stages and the flat portions 8A and 8B are provided one by one in the front and rear rows. However, when the heat transfer tubes 5 are arranged in many stages, The portions 8A and 8B are arranged so as to be repeatedly scattered in the same pattern in the vertical direction. In addition, as shown in FIG.
The heat transfer fins 1 into which the front and rear two rows of heat transfer tubes 5 are inserted can be constituted by the front row heat transfer fins 1a and the rear row heat transfer fins 1b. Thus, the heat transfer fins 1a can be turned upside down to form 1b, so that the heat transfer fins 1a can be used in either of the left and right rows, and can be easily manufactured. Further, as shown in FIG. 4, it is preferable to provide the ribs 20 extending in the vertical direction at the side edges and the center of the heat transfer fin 1 because the rigidity of the heat transfer fin 1 can be increased. According to the present invention, a decrease in the amount of heat exchange of the heat exchanger can be suppressed.
【図面の簡単な説明】
【図１】本発明を適用してなる熱交換器の一実施形態の
縦断面図である。
【図２】本発明を適用してなる熱交換器の一実施形態の
変形例である。
【図３】本発明を適用してなる熱交換器の一実施形態の
変形例である。
【図４】本発明を適用してなる熱交換器の一実施形態の
変形例である。
【符号の説明】
１ 伝熱フィン
５ 伝熱管
８Ａ、８Ｂ フラット部
９ スリット部BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a longitudinal sectional view of one embodiment of a heat exchanger to which the present invention is applied. FIG. 2 is a modified example of one embodiment of the heat exchanger to which the present invention is applied. FIG. 3 is a modification of one embodiment of the heat exchanger to which the present invention is applied. FIG. 4 is a modification of one embodiment of the heat exchanger to which the present invention is applied. [Description of Signs] 1 Heat transfer fins 5 Heat transfer tubes 8A, 8B Flat section 9 Slit section
Claims (1)
と、該伝熱フィンに直交させて配設された伝熱管とを備
え、前記伝熱管は上下方向に複数段、かつ水平方向に複
数列設けられ、 前記伝熱フィンは、上下端部の伝熱面及び少なくとも上
下に隣り合う前記伝熱管の間の伝熱面に、スリット又は
ルーバが形成された第1の部分と該スリット又はルーバ
が形成されていない第2の部分とを有し、水平方向に隣
り合う列の第2の部分は互いに上下方向に前記伝熱管の
段間の距離以上ずらして形成されてなる熱交換器。Claims 1. A heat transfer fin comprising a plurality of heat transfer fins arranged in parallel, and a heat transfer tube arranged perpendicular to the heat transfer fins, wherein the heat transfer tubes are arranged in a plurality in a vertical direction. The heat transfer fins are provided in a plurality of rows in a horizontal direction, and the heat transfer fins have a first or second heat transfer surface between upper and lower end portions and at least a heat transfer surface between the heat transfer tubes vertically adjacent to each other. And the second portion where the slit or louver is not formed, and the second portions of the horizontally adjacent rows are formed to be shifted from each other in the vertical direction by a distance equal to or more than the distance between the steps of the heat transfer tube. Heat exchanger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001321798A JP3867113B2 (en) | 2001-10-19 | 2001-10-19 | Heat exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001321798A JP3867113B2 (en) | 2001-10-19 | 2001-10-19 | Heat exchanger |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2003130567A true JP2003130567A (en) | 2003-05-08 |
| JP3867113B2 JP3867113B2 (en) | 2007-01-10 |
Family
ID=19138955
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001321798A Expired - Fee Related JP3867113B2 (en) | 2001-10-19 | 2001-10-19 | Heat exchanger |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3867113B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012145302A (en) * | 2011-01-14 | 2012-08-02 | Hitachi Appliances Inc | Refrigeration cycle device |
| JP2014228236A (en) * | 2013-05-24 | 2014-12-08 | 三菱電機株式会社 | Flat tube heat exchanger, air conditioner outdoor unit including flat tube heat exchanger, and method of manufacturing flat tube heat exchanger |
| CN107965948A (en) * | 2017-11-21 | 2018-04-27 | 广东美的制冷设备有限公司 | Heat-exchanger rig and air-conditioning equipment |
| CN112665224A (en) * | 2021-01-15 | 2021-04-16 | 青岛海信日立空调***有限公司 | Air conditioner |
| US11561014B2 (en) * | 2016-03-16 | 2023-01-24 | Samsung Electronics Co., Ltd. | Air conditioner including a heat exchanger |
-
2001
- 2001-10-19 JP JP2001321798A patent/JP3867113B2/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012145302A (en) * | 2011-01-14 | 2012-08-02 | Hitachi Appliances Inc | Refrigeration cycle device |
| JP2014228236A (en) * | 2013-05-24 | 2014-12-08 | 三菱電機株式会社 | Flat tube heat exchanger, air conditioner outdoor unit including flat tube heat exchanger, and method of manufacturing flat tube heat exchanger |
| US11561014B2 (en) * | 2016-03-16 | 2023-01-24 | Samsung Electronics Co., Ltd. | Air conditioner including a heat exchanger |
| CN107965948A (en) * | 2017-11-21 | 2018-04-27 | 广东美的制冷设备有限公司 | Heat-exchanger rig and air-conditioning equipment |
| CN112665224A (en) * | 2021-01-15 | 2021-04-16 | 青岛海信日立空调***有限公司 | Air conditioner |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3867113B2 (en) | 2007-01-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP2314972B1 (en) | Heat exchanger | |
| JP4989979B2 (en) | Heat exchanger | |
| JP4946348B2 (en) | Air heat exchanger | |
| JP3110196U (en) | Thin tube heat exchanger | |
| KR19990021475A (en) | Fin Heat Exchanger | |
| US5667006A (en) | Fin tube heat exchanger | |
| JPH07109353B2 (en) | Heat exchanger with fins | |
| KR20060012303A (en) | Heat exchanger fin, heat exchanger, condensers, and evaporators | |
| JP2003130567A (en) | Heat exchanger | |
| US5642777A (en) | Fin tube heat exchanger | |
| JP2017161186A (en) | Fin tube heat exchanger | |
| JPH0363499A (en) | Heat exchanger with fins | |
| JP2002031434A (en) | Heat exchanger for air conditioner | |
| JPH1123179A (en) | Heat exchanger with fin | |
| JP2005180772A (en) | Indoor unit of air conditioner | |
| JP4184110B2 (en) | Finned tube heat exchanger | |
| JPH0313794A (en) | Heat exchanger with fin | |
| JP3883880B2 (en) | Heat exchanger | |
| JPH0886581A (en) | Cross-fin tube type heat exchanger | |
| JP3074113B2 (en) | Refrigerant evaporator | |
| JP2005003350A (en) | Heat exchanger fin, heat exchanger, condenser and evaporator | |
| CN216080086U (en) | Air conditioner | |
| JP2010127511A (en) | Heat exchanger | |
| JPH0612376Y2 (en) | Air heat exchanger | |
| JP2002090082A (en) | Heat exchanger |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20051213 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20051220 |
|
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20060404 |
|
| A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20060501 |
|
| R150 | Certificate of patent or registration of utility model |
Free format text: JAPANESE INTERMEDIATE CODE: R150 |
|
| R154 | Certificate of patent or utility model (reissue) |
Free format text: JAPANESE INTERMEDIATE CODE: R154 |
|
| S111 | Request for change of ownership or part of ownership |
Free format text: JAPANESE INTERMEDIATE CODE: R313113 |
|
| SZ03 | Written request for cancellation of trust registration |
Free format text: JAPANESE INTERMEDIATE CODE: R313Z03 |
|
| 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: 20091020 Year of fee payment: 3 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20091020 Year of fee payment: 3 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20101020 Year of fee payment: 4 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20111020 Year of fee payment: 5 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20121020 Year of fee payment: 6 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20121020 Year of fee payment: 6 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20131020 Year of fee payment: 7 |
|
| 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: R313113 |
|
| S531 | Written request for registration of change of domicile |
Free format text: JAPANESE INTERMEDIATE CODE: R313531 |
|
| R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
| LAPS | Cancellation because of no payment of annual fees |