JP3359466B2 - Evaporator for room air conditioner - Google Patents
Evaporator for room air conditionerInfo
- Publication number
- JP3359466B2 JP3359466B2 JP14166695A JP14166695A JP3359466B2 JP 3359466 B2 JP3359466 B2 JP 3359466B2 JP 14166695 A JP14166695 A JP 14166695A JP 14166695 A JP14166695 A JP 14166695A JP 3359466 B2 JP3359466 B2 JP 3359466B2
- Authority
- JP
- Japan
- Prior art keywords
- heat transfer
- transfer tubes
- evaporator
- flat heat
- flat
- 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
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
- F28F17/00—Removing ice or water from heat-exchange apparatus
- F28F17/005—Means for draining condensates from heat exchangers, e.g. from evaporators
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Devices For Blowing Cold Air, Devices For Blowing Warm Air, And Means For Preventing Water Condensation In Air Conditioning Units (AREA)
Description
【０００１】[0001]
【産業上の利用分野】この発明に係るルームエアコン用
エバポレータは、一般住宅の室内を冷房或は除湿する為
のルームエアコンに組み込み、室内に吹き出す空気の温
度を低下させる。BACKGROUND OF THE INVENTION An evaporator for a room air conditioner according to the present invention is incorporated in a room air conditioner for cooling or dehumidifying a room in a general house, and lowers the temperature of air blown into the room.
【０００２】[0002]
【従来の技術】ルームエアコンには、伝熱管とフィンと
を有するエバポレータを組み込んで、室内に吹き出す空
気を冷却自在としている。冷房時には上記伝熱管に液状
冷媒を送り込み、この液状冷媒を内部で蒸発させる事に
より、エバポレータの温度を低下させる。空調用の空気
は隣り合う伝熱管同士の間に設けられたフィンの間を通
過する事で温度低下する。この際、空気中に含まれる水
蒸気は、上記伝熱管及びフィンの表面で凝縮する。この
様に伝熱管及びフィンの表面に付着した凝縮水は、重力
により流下してエバポレータの下方に設けられたドレン
受に捕集され、ドレンホースを通じて排出される。2. Description of the Related Art A room air conditioner incorporates an evaporator having heat transfer tubes and fins so that air blown into a room can be cooled. At the time of cooling, a liquid refrigerant is sent to the heat transfer tube, and the liquid refrigerant is evaporated therein, thereby lowering the temperature of the evaporator. The temperature of the air-conditioning air drops when it passes between fins provided between adjacent heat transfer tubes. At this time, the water vapor contained in the air condenses on the surfaces of the heat transfer tubes and the fins. The condensed water that has adhered to the surfaces of the heat transfer tubes and the fins flows down by gravity, is collected by a drain receiver provided below the evaporator, and is discharged through a drain hose.
【０００３】従来の一般的なエバポレータは、上記伝熱
管として銅製の円管を使用し、上記フィンとしてアルミ
ニウム薄板製で平板状のプレートフィンを使用してい
た。そして、エバポレータの設置状態で、多数のプレー
トフィンを鉛直方向に配置していた。従って、上記伝熱
管及びフィンの表面に付着した凝縮水は、上記多数のプ
レートフィンの表面を下方に向け円滑に流れ、上記ドレ
ン受に効率良く捕集される。A conventional general evaporator uses a copper circular tube as the heat transfer tube and a flat plate fin made of a thin aluminum plate as the fin. Then, with the evaporator installed, a number of plate fins are arranged in the vertical direction. Therefore, the condensed water adhering to the surfaces of the heat transfer tubes and the fins smoothly flows downward on the surfaces of the plate fins, and is efficiently collected by the drain receiver.
【０００４】銅製の円管とプレートフィンとを組み合わ
せたエバポレータは、凝縮水排出の面からは好ましい
が、冷房効率の面からは必ずしも好ましいものではな
い。即ち、円管は通気抵抗が大きい割合に伝熱効率が悪
く、表面が平坦なプレートフィンは空気との間の熱交換
効率が必ずしも良くない。この為、十分な冷房能力を得
る為には、通風面積が広い、大型のエバポレータを使用
する必要があった。[0004] An evaporator in which a copper circular tube and a plate fin are combined is preferable in terms of discharging condensed water, but is not necessarily preferable in terms of cooling efficiency. That is, the heat transfer efficiency of the circular tube is low to the extent that the airflow resistance is large, and the plate fin having a flat surface does not necessarily have a good heat exchange efficiency with air. For this reason, in order to obtain sufficient cooling capacity, it was necessary to use a large evaporator having a large ventilation area.
【０００５】この様な事情に鑑みて本発明者等は、小型
で十分な冷房能力を得られるルームエアコン用エバポレ
ータを考えた。この新規なルームエアコン用エバポレー
タの構造に就いて、本発明の実施例を示す図１により説
明する。このエバポレータ１は、水平方向（図１の左右
方向）に間隔をあけて配置された左右１対のヘッダ２
ａ、２ｂを有する。各ヘッダ２ａ、２ｂは、アルミニウ
ム合金製の円管の上下両端開口を蓋体により塞いで成
り、互いに対向する側面に、スリット状の通孔３、３を
形成している。又、一方（図１の右方）のヘッダ２ａの
内側中間部は隔壁で仕切られて、上側の入口室と下側の
出口室とに２分割されている。そして、このうちの入口
室に入口管４を、出口室に出口管５を、それぞれ接続し
ている。隔壁は、上記ヘッダ２ａの高さ方向中央よりも
少し上側に存在する。従って、上記出口室の容積は、上
記入口室の容積よりも大きい。これは、気液混合状態で
上記入口室に繰り込まれた冷媒が、このエバポレータ内
で蒸発する事により体積を増大させてから、上記出口室
に送り出される為である。他方（図１の左方）のヘッダ
２ｂの内部には隔壁は設けていない。In view of such circumstances, the present inventors have conceived an evaporator for a room air conditioner which is small and has sufficient cooling capacity. An embodiment of the novel room air conditioner evaporator will be described with reference to FIG. 1 showing an embodiment of the present invention. This evaporator 1 is composed of a pair of left and right headers 2 arranged at intervals in the horizontal direction (the left and right direction in FIG. 1).
a and 2b. Each of the headers 2a and 2b is formed by closing the upper and lower ends of a circular pipe made of an aluminum alloy with lids, and has slit-shaped through holes 3 and 3 formed on opposing side surfaces. The middle part of the inside of one header 2a (right side in FIG. 1) is partitioned by a partition wall, and is divided into an upper inlet chamber and a lower outlet chamber. The inlet pipe 4 is connected to the inlet chamber, and the outlet pipe 5 is connected to the outlet chamber. The partition wall exists slightly above the center of the header 2a in the height direction. Therefore, the volume of the outlet chamber is larger than the volume of the inlet chamber. This is because the refrigerant drawn into the inlet chamber in a gas-liquid mixed state evaporates in the evaporator to increase the volume, and is then sent out to the outlet chamber. No partition is provided inside the header 2b on the other side (left side in FIG. 1).
【０００６】上述の様な１対のヘッダ２ａ、２ｂの間に
は、複数の扁平伝熱管６、６を設けている。この扁平伝
熱管６、６は、アルミニウム合金製の薄板を、幅方向中
央部で断面Ｕ字形に折り返し、幅方向両端縁同士をろう
付けする事により構成されている。この様な扁平伝熱管
６、６は、上下方向に亙り互いに間隔をあけて配置さ
れ、それぞれの両端部を上記各通孔３、３内に挿入し
て、それぞれの両端開口を上記両ヘッダ２ａ、２ｂ内に
通じさせている。上記各通孔３、３の内周縁と上記各扁
平伝熱管６、６の両端部外周面との間は全周に亙り密に
ろう付けしている。この様に１対のヘッダ２ａ、２ｂ同
士の間に掛け渡した複数の扁平伝熱管６、６同士の間に
は、コルゲート型の伝熱フィン７、７を挟持し、これら
各伝熱フィン７、７と上記各扁平伝熱管６、６の上下両
面とをろう付けしている。これら各伝熱フィン７、７
は、アルミニウム合金製の薄板により造られ、平坦部と
折り返し部とを交互に連続させた波形形状を有する。こ
のうちの平坦部には、ルーバと称される曲げ起こし部が
形成されて、隣り合う平坦部同士の間を通過する空気の
流れを乱す様にしている。A plurality of flat heat transfer tubes 6, 6 are provided between the pair of headers 2a, 2b as described above. The flat heat transfer tubes 6 are formed by folding a thin plate made of an aluminum alloy into a U-shaped cross section at the center in the width direction and brazing the both ends in the width direction. Such flat heat transfer tubes 6, 6 are arranged at intervals from one another in the vertical direction. Both ends are inserted into the through holes 3, 3, and the openings at both ends are connected to the headers 2a. , 2b. The inner peripheral edges of the through holes 3, 3 and the outer peripheral surfaces of both ends of the flat heat transfer tubes 6, 6 are brazed tightly over the entire circumference. The corrugated heat transfer fins 7, 7 are sandwiched between the plurality of flat heat transfer tubes 6, 6 bridged between the pair of headers 2a, 2b in this manner. , 7 and the upper and lower surfaces of the flat heat transfer tubes 6, 6 are brazed. Each of these heat transfer fins 7, 7
Is made of a thin plate made of an aluminum alloy and has a corrugated shape in which flat portions and folded portions are alternately continued. A bent portion called a louver is formed in the flat portion to disturb the flow of air passing between adjacent flat portions.
【０００７】最上段の扁平伝熱管６の上面にろう付けさ
れた伝熱フィン７の上側、並びに最下段の扁平伝熱管６
の下面にろう付けされた伝熱フィン７の下側には、それ
ぞれサイドプレート１４ａ、１４ｂをろう付け固定して
いる。このうち、上側のサイドプレート１４ａの一部に
取付フランジ１５、１５を折り曲げ形成し、この取付フ
ランジ１５、１５によってエバポレータ１を、ルームエ
アコンの本体に取り付け自在としている。The upper side of the heat transfer fins 7 brazed to the upper surface of the uppermost flat heat transfer tube 6 and the lowermost flat heat transfer tube 6
Side plates 14a and 14b are brazed and fixed to the lower side of the heat transfer fins 7 brazed to the lower surface of the fin, respectively. Of these, mounting flanges 15 and 15 are formed by bending a part of the upper side plate 14a, and the evaporator 1 can be mounted on the main body of the room air conditioner by the mounting flanges 15 and 15.
【０００８】上述の様な扁平伝熱管６、６とコルゲート
型の伝熱フィン７、７とから構成されるエバポレータ１
は、小型で大きな冷房能力を発揮できる。即ち、扁平伝
熱管６、６は、同じ流路面積を有する円管に比べて通気
抵抗が小さい為、エバポレータに同じ量の冷媒を流すと
仮定した場合に、伝熱管の存在に基づく通気抵抗を減少
させられる。又、扁平伝熱管６、６の内外両面と冷媒若
しくは空気との間の熱交換効率が、円管の場合に比べて
向上する。更に、ルーバを設けたコルゲート型の伝熱フ
ィン７、７は平坦なプレートフィンに比べて空気との間
の熱交換効率が良く、エバポレータ１を通過する空気を
効率良く冷却できる。これらにより、図１に示す様な扁
平伝熱管６、６とコルゲート型の伝熱フィン７、７とか
ら成るエバポレータ１は、円管とプレートフィンとから
成る従来のエバポレータに比べて、小型で十分な冷房能
力を得られる。The evaporator 1 comprising the flat heat transfer tubes 6, 6 and the corrugated heat transfer fins 7, 7 as described above.
Is small and can exert large cooling capacity. That is, since the flat heat transfer tubes 6 and 6 have a smaller airflow resistance than a circular tube having the same flow passage area, the airflow resistance based on the presence of the heat transfer tubes is reduced when the same amount of refrigerant is flowed through the evaporator. Be reduced. Moreover, the heat exchange efficiency between the inner and outer surfaces of the flat heat transfer tubes 6 and 6 and the refrigerant or air is improved as compared with the case of a circular tube. Furthermore, the corrugated heat transfer fins 7, 7 provided with louvers have higher heat exchange efficiency with air than flat plate fins, and can efficiently cool air passing through the evaporator 1. Thus, the evaporator 1 including the flat heat transfer tubes 6 and 6 and the corrugated heat transfer fins 7 and 7 as shown in FIG. 1 is smaller and more sufficient than the conventional evaporator including the circular tube and the plate fin. High cooling capacity.
【０００９】[0009]
【発明が解決しようとする課題】ところが、扁平伝熱管
６、６とコルゲート型の伝熱フィン７、７とから成るエ
バポレータ１の場合、そのままでは凝縮水排出の面から
問題が生じる。即ち、水平方向に配設された扁平伝熱管
６、６同士の間に挟持された伝熱フィン７、７の表面に
付着した凝縮水は、そのままでは表面張力により伝熱フ
ィン７、７の折り返し部に溜ったまま、下方に流下しな
い。この結果、伝熱フィン７、７の一部が凝縮水で詰
り、エバポレータ１の通気面積が減少して、このエバポ
レータ１による冷却能力が低下する。更に著しい場合に
は、上記伝熱フィン７、７に付着した凝縮水が風に送ら
れて室内に飛散し、室内を汚損したり、或は室内に居る
者に不快感を与える事がある。However, in the case of the evaporator 1 comprising the flat heat transfer tubes 6, 6 and the corrugated heat transfer fins 7, 7, a problem arises in terms of the discharge of condensed water as it is. That is, the condensed water adhering to the surfaces of the heat transfer fins 7, 7 sandwiched between the flat heat transfer tubes 6, 6 disposed in the horizontal direction, turns the heat transfer fins 7, 7 back by the surface tension as it is. Do not flow downward while remaining in the part. As a result, a part of the heat transfer fins 7 is clogged with the condensed water, the ventilation area of the evaporator 1 is reduced, and the cooling capacity of the evaporator 1 is reduced. In a more severe case, the condensed water adhering to the heat transfer fins 7, 7 may be sent to the wind and scattered into the room, thereby contaminating the room or giving a person who is in the room a discomfort.
【００１０】上記エバポレータ１を縦長に配置すれば、
図１に示す様に横長に配置した場合に比べて凝縮水の排
出は円滑に行なえる。但し、室内に冷風を効率良く行き
渡らせる為には、エバポレータ１を横長に配置する必要
がある為、凝縮水排出の為に縦長配置を採用する事は現
実的でない。本発明は、この様な不都合を解消すべく、
扁平伝熱管６、６とコルゲート型の伝熱フィン７、７と
から成り、良好な冷房能力を有するエバポレータ１の凝
縮水排出を良好に行なえる様にすべく、発明したもので
ある。If the evaporator 1 is vertically arranged,
As shown in FIG. 1, the condensed water can be discharged more smoothly as compared with the case where it is arranged horizontally. However, since the evaporator 1 needs to be arranged horizontally in order to spread cold air efficiently in the room, it is not realistic to adopt a vertically long arrangement for discharging condensed water. The present invention, in order to eliminate such inconvenience,
The present invention has been invented in order to make it possible to discharge condensed water from the evaporator 1 having flat heat transfer tubes 6 and 6 and corrugated heat transfer fins 7 and 7 having good cooling capacity.
【００１１】[0011]
【課題を解決するための手段】本発明のルームエアコン
用エバポレータは、水平方向に間隔をあけて配置された
左右１対のヘッダと、上下方向に亙り互いに間隔をあけ
て配置され、それぞれの両端部をこれら両ヘッダ内に通
じさせた複数の扁平伝熱管と、金属薄板を波形に形成し
て成り、隣り合う扁平伝熱管同士の間に挟持されたコル
ゲート型の伝熱フィンとを備える。そして、上記各扁平
伝熱管の風下側端縁部を隣接する伝熱フィンの風下側端
縁よりも風下側に突出させている。更に、本発明のルー
ムエアコン用エバポレータの場合には、上記各扁平伝熱
管の風下側端縁に接触若しくは近接する状態で上下方向
に配置された導水板を備える。そして、この導水板は、
互いにＶ字形に設けられた１対の平板部と、これら両平
板部同士を連続させた折り返し部と、この折り返し部の
長さ方向複数個所に形成された、上記各扁平伝熱管の風
下側端部が進入自在な切り欠きとを備えたものであり、
これら各切り欠きの奥端部に上記各扁平伝熱管の風下側
端縁を、接触若しくは近接させている。SUMMARY OF THE INVENTION An evaporator for a room air conditioner according to the present invention is provided with a pair of left and right headers spaced apart in the horizontal direction and spaced apart from each other in the vertical direction. The heat exchanger includes a plurality of flat heat transfer tubes whose portions are communicated with both headers, and corrugated heat transfer fins formed by corrugating a thin metal plate and sandwiched between adjacent flat heat transfer tubes. The leeward edge of each of the flat heat transfer tubes protrudes more leeward than the leeward edge of the adjacent heat transfer fin. Further, in the case of the evaporator for a room air conditioner of the present invention, there is provided a water guide plate vertically arranged so as to be in contact with or close to the leeward edge of each of the flat heat transfer tubes. And this water guide plate,
A pair of flat plate portions provided in a V-shape with each other, a folded portion in which these flat plate portions are connected to each other, and a leeward end of each of the flat heat transfer tubes formed at a plurality of positions in the length direction of the folded portion. Part with a notch that can enter freely,
The leeward side edge of each of the flat heat transfer tubes is in contact with or near the deep end of each of the notches.
【００１２】[0012]
【作用】上述の様に構成される本発明のルームエアコン
用エバポレータの場合には、伝熱フィンの表面に付着し
た凝縮水が各扁平伝熱管の風下側端縁部で隣接する伝熱
フィンの風下側端縁よりも風下側に突出した部分に、エ
バポレータを通過する空気の流れによって送り出され
る。又、本発明のルームエアコン用エバポレータの場合
には、上記各扁平伝熱管の風下側端縁に接触若しくは近
接する状態で上下方向に配置された導水板の内側に、く
さび状の断面形状を有する隙間が形成される為、この導
水板の近傍に集まった凝縮水は、各切り欠きを通じてこ
の隙間内に、毛細管現象により吸引される。この様にし
て隙間内に吸引された凝縮水は、次第に隙間の一部で厚
さ寸法が大きくなった部分にまで達する（押し出され
る）。厚さ寸法の大きい部分では、毛細管現象により凝
縮水を保持しておく作用が弱い。従って、上記隙間内に
吸引された凝縮水の量が或る程度多くなると、この凝縮
水は、重力により、この隙間の下端開口からエバポレー
タの下方に滴下し、室外に排出される。In the case of the evaporator for a room air conditioner of the present invention configured as described above, the condensed water adhering to the surface of the heat transfer fin is removed from the heat transfer fin adjacent to the leeward edge of each flat heat transfer tube. The air is sent out to the portion that protrudes to the leeward side from the leeward edge by the flow of air passing through the evaporator. Further, in the case of the evaporator for a room air conditioner of the present invention, the evaporator is in contact with or near the leeward side edge of each of the flat heat transfer tubes.
Since a gap having a wedge-shaped cross-sectional shape is formed inside the water guide plate arranged vertically in contact with the condensed water collected near the water guide plate, through each notch, in this gap, Aspirated by capillary action. The condensed water sucked into the gap in this way gradually reaches (extrudes) a part of the gap where the thickness dimension is increased. In a portion having a large thickness dimension, the function of retaining condensed water by capillary action is weak. Therefore, when the amount of condensed water sucked into the gap increases to some extent, the condensed water drops from the lower end opening of the gap to below the evaporator by gravity and is discharged outside the room.
【００１３】[0013]
【実施例】図１〜５は本発明の第一実施例として、要件
の両方を採用した構造を示している。尚、前述の
「本発明の前提となる新規構造」部分で説明した部分に
就いては重複する説明を省略し、以下、凝縮水の排出を
効率良く行なうべく、この新規構造部分に付加した構造
を中心に説明する。1 to 5 show, as a first embodiment of the present invention, a structure employing both requirements. It should be noted that the description of the portion described in the above-mentioned "New structure on which the present invention is based" is omitted, and a structure added to this new structure portion will be described below in order to efficiently discharge condensed water. This will be mainly described.
【００１４】複数のコルゲート型の伝熱フィン７、７と
共にエバポレータ１を構成する扁平伝熱管６、６の風下
側端縁部は、図３に示す様に、隣接する伝熱フィン７、
７の風下側端縁よりも風下側（図３の右側）に突出させ
ている。上記各扁平伝熱管６、６を、アルミニウム合金
製の薄板を折り返し、幅方向両端縁同士をろう付けする
事により造る場合には、ろう付けの為の突き合わせ部
８、８を、図３に示す様に風下側に配置する。As shown in FIG. 3, the leeward side edges of the flat heat transfer tubes 6, 6 constituting the evaporator 1 together with the plurality of corrugated heat transfer fins 7, 7 are adjacent to each other.
7 is made to protrude further to the leeward side (right side in FIG. 3) than the leeward side edge. In the case where the flat heat transfer tubes 6 are formed by folding a thin plate made of an aluminum alloy and brazing the both edges in the width direction, the butted portions 8 for brazing are shown in FIG. To the leeward side.
【００１５】上記各扁平伝熱管６、６は図１に示す様
に、それぞれの中間部を鈍角（例えば１７４〜１７８度
程度。図示の例では１７６度。）に折り曲げている。従
ってこれら各扁平伝熱管６、６は、長さ方向（図１の左
右方向）中央部が高くなったヘ字形となっている。そし
て、これら各扁平伝熱管６、６の上面が、水平方向に対
して少し（例えば１〜３度程度。図示の例では２度。）
傾斜している。勿論、各サイドプレート１４ａ、１４ｂ
も、上記各扁平伝熱管６、６と同方向に折り曲げてい
る。As shown in FIG. 1, each of the flat heat transfer tubes 6 has an intermediate portion bent at an obtuse angle (for example, about 174 to 178 degrees; in the illustrated example, 176 degrees). Accordingly, each of the flat heat transfer tubes 6 has a f-shape in which the central portion in the length direction (the left-right direction in FIG. 1) is raised. The upper surface of each of the flat heat transfer tubes 6 is slightly (for example, about 1 to 3 degrees; 2 degrees in the illustrated example) with respect to the horizontal direction.
It is inclined. Of course, each side plate 14a, 14b
Are bent in the same direction as the flat heat transfer tubes 6.
【００１６】更に、上記エバポレータ１の一部で、左右
１対のヘッダ２ａ、２ｂよりも少しだけ内側に寄った部
分には、金属製或は合成樹脂製の導水板９、９を設けて
いる。図示の実施例の場合にこの導水板９、９は、アル
ミニウム合金製の板材をＶ字形に折り曲げる事により構
成しており、１対の平板部１０ａ、１０ｂと、これら両
平板部１０ａ、１０ｂの風上側端縁同士を連続させる折
り返し部１１とを備える。そして、この折り返し部１１
を設けた風上側端縁部に、複数の切り欠き１２、１２
を、上記扁平伝熱管６、６と等ピッチで形成している。
これら各切り欠き１２、１２は、全体をＶ字形に形成さ
れており、それぞれの奥端部に、Ｕ字形の切り込み１
３、１３を形成している。これら各切り込み１３、１３
には、上記各扁平伝熱管６、６の風下側端部で、前記伝
熱フィン７、７の風下側端縁よりも突出した部分が、進
入自在である。図示の実施例では、上記各平板部１０
ａ、１０ｂの一部で互いに対向する複数個所（図示の例
では、４個所ずつ合計８個所）に、相手側の平板部１０
ａ、１０ｂに向けて突出する凸部１７、１７を形成して
いる。上記アルミニウム合金製の板材をＶ字形に折り曲
げた状態では、これら凸部１７、１７の先端同士が互い
に突き当たり、１対の平板部１０ａ、１０ｂ同士の間
に、くさび状の断面形状を有し小さな（例えば０．５〜
１mm程度）厚さ寸法を有する隙間１８を形成する。尚、
この様な隙間１８を確保する為に、上記各平板部１０
ａ、１０ｂには、凸部１７、１７に代えて、折り曲げ縁
を形成する事もできる。折り曲げ縁は、各平板部１０
ａ、１０ｂの一部で上記折り返し部１１と反対側端縁
を、互いに近づく方向に折り曲げ形成する。Further, water guide plates 9 made of metal or synthetic resin are provided on a part of the evaporator 1 which is slightly inward from the pair of left and right headers 2a and 2b. . In the case of the illustrated embodiment, the water guide plates 9, 9 are formed by bending a plate made of an aluminum alloy into a V-shape, and a pair of flat plate portions 10a, 10b and a pair of flat plate portions 10a, 10b are formed. A folded portion 11 for making the windward edges continuous with each other. Then, the folded portion 11
A plurality of notches 12, 12
Are formed at the same pitch as the flat heat transfer tubes 6.
Each of these notches 12, 12 is formed in a V-shape as a whole, and a U-shaped notch 1
3 and 13 are formed. Each of these cuts 13, 13
At the leeward end of each of the flat heat transfer tubes 6, 6, a portion protruding from the leeward edge of the heat transfer fins 7, 7 can enter freely. In the illustrated embodiment, each of the flat plate portions 10
a, 10b, a plurality of opposing portions (in the illustrated example, four locations in total, eight locations in total),
Protrusions 17, 17 projecting toward a, 10b are formed. In the state where the aluminum alloy plate material is bent in a V-shape, the tips of the projections 17 abut against each other and have a wedge-shaped cross-sectional shape between the pair of flat plate portions 10a and 10b. (For example, 0.5 to
A gap 18 having a thickness of about 1 mm is formed. still,
In order to secure such a gap 18, each of the flat plate portions 10
A bent edge can be formed on a and 10b instead of the convex portions 17 and 17. The bent edge is each flat plate portion 10
In portions a and 10b, the opposite side edges of the folded portion 11 are bent and formed in directions approaching each other.
【００１７】又、上記１対の平板部１０ａ、１０ｂのう
ち、一方の平板部１０ａの上下両端部には、この平板部
１０ａから他方の平板部１０ｂと反対側に直角に折れ曲
がった、取付板部１６、１６を形成している。上記導水
板９、９をエバポレータ１に取り付けるには、これら取
付板部１６、１６を上側のサイドプレート１４ａの両端
部上面並びに下側のサイドプレート１４ｂの両端部下面
に、リベット、止めピン、ねじ、ろう付け等により固定
する。この様に固定した状態では、上記各扁平伝熱管
６、６の風下側端縁と上記各切り込み１３、１３の奥端
とが、接触若しくは近接する。尚、これら各切り込み１
３、１３は、扁平伝熱管６、６と等ピッチで形成されて
いる。この為、上記各導水板９、９は、本来の目的であ
る凝縮水の排出機能の他、エバポレータ１の組立時に於
ける、扁平伝熱管６、６の位置決め用治具としての機能
も備える。Of the pair of flat plates 10a and 10b, the upper and lower ends of one flat plate 10a have mounting plates bent at right angles from the flat plate 10a to the opposite side to the other flat plate 10b. The parts 16 and 16 are formed. In order to attach the water guide plates 9 and 9 to the evaporator 1, the attachment plates 16 and 16 are attached to upper surfaces of both ends of the upper side plate 14a and lower surfaces of both ends of the lower side plate 14b by rivets, set pins, and screws. And fixed by brazing or the like. In such a fixed state, the leeward edge of each of the flat heat transfer tubes 6 and 6 comes into contact with or close to the deep end of each of the cuts 13. Each of these cuts 1
3 and 13 are formed at the same pitch as the flat heat transfer tubes 6 and 6. For this reason, each of the water guide plates 9 has a function as a jig for positioning the flat heat transfer tubes 6 in assembling the evaporator 1 in addition to a function of discharging condensed water, which is an original purpose.
【００１８】更に、図示の実施例では、上側のサイドプ
レート１４ａに形成した取付フランジ１５、１５は、図
３に示す様に、このサイドプレート１４ａに対して鋭角
（例えば７０〜８０度程度。図示の例では７５度。）に
傾斜している。従って、上記取付フランジ１５、１５を
ルームエアコン本体に設けた鉛直方向の取付部に結合固
定した場合に、上記各扁平伝熱管６、６の上下両面は、
風上側が高く、風下側が低くなる方向に、上記鋭角の余
角分（例えば２０〜１０度。図示の例では１５度。）だ
け傾斜する。Further, in the illustrated embodiment, the mounting flanges 15, 15 formed on the upper side plate 14a are acute angles to the side plate 14a (for example, about 70 to 80 degrees, as shown in FIG. 3). In the example of FIG. Therefore, when the mounting flanges 15 and 15 are connected and fixed to a vertical mounting portion provided in the room air conditioner main body, the upper and lower surfaces of each of the flat heat transfer tubes 6 and 6 are:
Incline in the direction in which the windward side is higher and the leeward side is lower by the additional angle of the acute angle (for example, 20 to 10 degrees; 15 degrees in the illustrated example).
【００１９】上述の様に構成される本発明のルームエア
コン用エバポレータの場合には、次の様な作用により、
扁平伝熱管６、６及び伝熱フィン７、７の表面に付着し
た凝縮水を効率良く排出する。ルームエアコンの運転時
に、エバポレータ１の温度低下に伴って上記両部材６、
７の表面に付着した凝縮水は、図示しない送風ファンに
より送られる風により、このエバポレータ１を構成する
上記各扁平伝熱管６、６の風下側に送られる。そして、
これら各扁平伝熱管６、６の風下側端縁部で、隣接する
伝熱フィン７、７の風下側端縁よりも風下側に突出した
部分に達し、前記突き合わせ部８、８に集まる。特に、
図示の実施例の場合には、上述の様に、上記各扁平伝熱
管６、６の上下両面が傾斜しているので、上記両部材
６、７の表面に付着した凝縮水が上記各突き合わせ部
８、８に効率良く集められる。In the case of the evaporator for a room air conditioner of the present invention configured as described above, the following operation is performed.
Condensed water adhering to the surfaces of the flat heat transfer tubes 6, 6 and the heat transfer fins 7, 7 is efficiently discharged. During operation of the room air conditioner, the two members 6,
The condensed water adhering to the surface of the evaporator 1 is sent to the leeward side of the flat heat transfer tubes 6 constituting the evaporator 1 by the air sent by a blowing fan (not shown). And
At the leeward edge of each of the flat heat transfer tubes 6, 6, the heat transfer fins 7, 7 reach the leeward side from the leeward edge of the adjacent heat transfer fins 7, and gather at the butting portions 8, 8. In particular,
In the illustrated embodiment, as described above, since the upper and lower surfaces of each of the flat heat transfer tubes 6 and 6 are inclined, condensed water adhered to the surfaces of the two members 6 and 7 is removed by the respective butting portions. Collected efficiently at 8, 8.
【００２０】この様にして、上記各扁平伝熱管６、６の
風下側端縁部に存在する突き合わせ部８、８に集められ
た凝縮水は、更にこれら各扁平伝熱管６、６の傾斜（図
示の実施例では前記２度）に沿って、各扁平伝熱管６、
６の両端部に向けて流れる。そして、これら各扁平伝熱
管６、６の風下側端縁に接触若しくは近接する状態で上
下方向に設けられた導水板９、９に沿って流下する。図
示の実施例では、これら各導水板９、９は、上下方向に
連続する隙間１８を有する。この隙間１８はくさび状の
断面形状を有し、しかも厚さ寸法は小さい為、上記各導
水板９、９の近傍に集まった凝縮水は、前記切り込み１
３、１３を含む切り欠き１２、１２を通じて隙間１８内
に、毛細管現象により吸引される。この様にして隙間１
８内に吸引された凝縮水は、次第に隙間１８の一部で厚
さ寸法が大きくなった部分にまで達する（押し出され
る）。厚さ寸法の大きい部分では、毛細管現象により凝
縮水を保持しておく作用が弱い。従って、上記隙間１８
内に吸引された凝縮水の量が或る程度多くなると、この
凝縮水は、重力により、この隙間１８の下端開口から、
エバポレータ１の下方に設けられたドレン受に滴下し、
ドレンホース等を通じて室外に排出される。In this way, the condensed water collected at the butting portions 8, 8 existing on the leeward side edges of the flat heat transfer tubes 6, 6 is further inclined by the flat heat transfer tubes 6, 6. In the illustrated embodiment, each flat heat transfer tube 6,
6 flows toward both ends. Then, it flows down along the water guide plates 9, 9 provided in the vertical direction in a state of contacting or approaching the leeward edge of each of the flat heat transfer tubes 6, 6. In the illustrated embodiment, each of the water guide plates 9 has a gap 18 that is continuous in the vertical direction. Since the gap 18 has a wedge-shaped cross-sectional shape and a small thickness, condensed water collected near each of the water guide plates 9, 9 is removed by the cut 1.
The gas is sucked into the gap 18 through the notches 12 and 12 including the caps 3 and 13 by capillary action. In this way, gap 1
The condensed water sucked into 8 gradually reaches (extrudes) a part of the gap 18 where the thickness dimension is increased. In a portion having a large thickness dimension, the function of retaining condensed water by capillary action is weak. Therefore, the gap 18
When the amount of the condensed water sucked into the inside increases to a certain degree, the condensed water flows from the lower end opening of the gap 18 due to gravity.
Drip into a drain receiver provided below the evaporator 1,
It is discharged outside through a drain hose or the like.
【００２１】次に、図６は本発明の第二実施例を示して
いる。本実施例の場合には、扁平伝熱管６、６を構成す
るアルミニウム合金板の両端縁部に折り曲げ縁１９、１
９を形成している。そして、扁平伝熱管６、６を構成し
た状態で、これら各扁平伝熱管６、６の風下側端縁部に
凹溝２０、２０を、各扁平伝熱管６、６の全長に亙って
形成している。各扁平伝熱管６、６の上面を風下側端縁
部にまで流れた凝縮水は、上面側の凹溝２０、２０内を
流れて排出される。その他の構成及び作用は、上述した
第一実施例と同様である。FIG. 6 shows a second embodiment of the present invention. In the case of the present embodiment, the bent edges 19, 1 and 1 are provided at both end portions of the aluminum alloy plate constituting the flat heat transfer tubes 6, 6.
9 are formed. Then, with the flat heat transfer tubes 6, 6 formed, concave grooves 20, 20 are formed over the entire length of the flat heat transfer tubes 6, 6 at the leeward edge of the flat heat transfer tubes 6, 6. are doing. The condensed water that has flowed on the upper surface of each of the flat heat transfer tubes 6 and 6 to the leeward side edge portion flows through the concave grooves 20 and 20 on the upper surface and is discharged. Other configurations and operations are the same as those of the above-described first embodiment.
【００２２】尚、図示の実施例では、各扁平伝熱管６、
６の上面を水平方向に対して傾斜させると共に導水板
９、９を設けているが、何れか一方のみでも、凝縮水の
排出を或る程度効率良く行なえる。例えば、各扁平伝熱
管６、６の上面を水平方向に対して傾斜させただけの場
合には、各扁平伝熱管６、６の上面に沿って両端側に流
れた凝縮水は、次いで左右１対のヘッダ２ａ、２ｂの表
面に沿って下方に流下し、上記ドレン受に滴下する。
又、上記各扁平伝熱管６、６の上面を水平にしたまま、
上記導水板９、９のみを設けた場合には、先ず、上記各
扁平伝熱管６、６の風下側端縁部で各導水板９、９の近
傍位置に存在する凝縮水がこれら各導水板９、９に沿っ
て流下する。そして、各導水板９、９部分の凝縮水が減
少した分、これら各導水板９、９から離れた部分に付着
した凝縮水が、次々にこれら各導水板９、９に向けて流
れ、エバポレータ１全体に付着した凝縮水の排出が、各
導水板９、９を通じて行なわれる。但し、各扁平伝熱管
６、６の上面を水平方向に対して傾斜させると共に導水
板９、９を設ければ、凝縮水の排出をより効率良く行な
える。又、凝縮水の滴下位置を狭い範囲（導水板９、９
の直下位置）に規制できるので、エバポレータ１の下方
に設けるドレン受が小さくて足りる。In the illustrated embodiment, each flat heat transfer tube 6,
Although the upper surface of 6 is inclined with respect to the horizontal direction and the water guide plates 9 and 9 are provided, the discharge of the condensed water can be performed to some extent efficiently by only one of them. For example, when the upper surfaces of the flat heat transfer tubes 6, 6 are merely inclined with respect to the horizontal direction, the condensed water flowing to both ends along the upper surfaces of the flat heat transfer tubes 6, 6 is then left and right. It flows down along the surface of the pair of headers 2a and 2b, and drops on the drain receiver.
Also, with the upper surfaces of the flat heat transfer tubes 6 and 6 kept horizontal,
When only the water guide plates 9 and 9 are provided, first, condensed water existing in the vicinity of the respective water guide plates 9 and 9 at the leeward edge of each of the flat heat transfer tubes 6 and 6 is subjected to the respective water guide plates. Flow down along 9,9. The condensed water adhering to the portions away from the respective water guide plates 9 and 9 flows toward the respective water guide plates 9 and 9 one after another by an amount corresponding to the reduced condensed water in the respective water guide plates 9 and 9 and the evaporator. The condensed water adhered to the whole 1 is discharged through each of the water guide plates 9, 9. However, if the upper surfaces of the flat heat transfer tubes 6 are inclined with respect to the horizontal direction and the water guide plates 9 are provided, the condensed water can be discharged more efficiently. In addition, the drop position of the condensed water is set in a narrow range (water guide plates 9, 9).
(The position immediately below the evaporator 1), the drain receiver provided below the evaporator 1 is small and sufficient.
【００２３】又、図示の実施例では、各扁平伝熱管６、
６の中央部を高く、両端部を低くしているが、これとは
逆に、中央部を低く、両端部を高くする事もできる。こ
の場合に導水板９は、エバポレータ１の中央部に１個又
は複数個設ける。この場合には、小さなドレン受を、エ
バポレータ１の中央部下方に１個だけ設ければ足りる。
又、図示は省略したが、導水板の一端縁部をヘッダ２
ａ、２ｂにろう付け等により固定し、この導水板の他端
縁を各扁平伝熱管６、６の風下側端縁部に接触若しくは
近接させる事もできる。更には、導水板を合成樹脂製と
する事もできる。但し、合成樹脂製の導水板を使用する
場合には、エバポレータ１を構成する他の部材同士をろ
う付け接合した後、導水板を装着する。In the illustrated embodiment, each of the flat heat transfer tubes 6,
Although the central part of 6 is made high and both ends are made low, conversely, the central part can be made low and both ends can be made high. In this case, one or more water guide plates 9 are provided at the center of the evaporator 1. In this case, it is sufficient to provide only one small drain receiver below the center of the evaporator 1.
Although not shown, one edge of the water guide plate is connected to the header 2.
a, 2b by brazing or the like, and the other end of the water guide plate can be brought into contact with or close to the leeward edge of each of the flat heat transfer tubes 6, 6. Further, the water guide plate may be made of a synthetic resin. However, when a water guide plate made of synthetic resin is used, the water guide plate is attached after brazing and joining other members constituting the evaporator 1 together.
【００２４】[0024]
【発明の効果】本発明のルームエアコン用エバポレータ
は、以上に述べた通り構成され作用するので、良好な冷
房能力を有するエバポレータの凝縮水排出を良好に行な
って、小型でしかも優れた冷房能力を有するルームエア
コンの実用化に寄与できる。Since the evaporator for a room air conditioner of the present invention is constructed and operates as described above, the evaporator having a good cooling ability can discharge condensed water satisfactorily and have a small and excellent cooling ability. It can contribute to the practical application of room air conditioners.
【図１】本発明の第一実施例を示す正面図。FIG. 1 is a front view showing a first embodiment of the present invention.
【図２】図１の左部拡大図。FIG. 2 is an enlarged view of the left part of FIG.
【図３】図１の拡大Ａ−Ａ断面図。FIG. 3 is an enlarged sectional view taken on line AA of FIG. 1;
【図４】導水板のみを取り出して図２の左方から見た
図。FIG. 4 is a diagram showing only a water guide plate taken out and viewed from the left side of FIG. 2;
【図５】図４の拡大底面図。FIG. 5 is an enlarged bottom view of FIG. 4;
【図６】本発明の第二実施例を示す、図３と同様の図。FIG. 6 is a view similar to FIG. 3, showing a second embodiment of the present invention.
１ エバポレータ ２ａ、２ｂ ヘッダ ３ 通孔 ４ 入口管 ５ 出口管 ６ 扁平伝熱管 ７ 伝熱フィン ８ 突き合わせ部 ９ 導水板 １０ａ、１０ｂ 平板部 １１ 折り返し部 １２ 切り欠き １３ 切り込み １４ａ、１４ｂ サイドプレート １５ 取付フランジ １６ 取付板部 １７ 凸部 １８ 隙間 １９ 折り曲げ縁 ２０ 凹溝 DESCRIPTION OF SYMBOLS 1 Evaporator 2a, 2b Header 3 Through-hole 4 Inlet pipe 5 Outlet pipe 6 Flat heat transfer tube 7 Heat transfer fin 8 Butting part 9 Water guide plate 10a, 10b Flat plate part 11 Folding part 12 Notch 13 Notch 14a, 14b Side plate 15 Mounting flange Reference Signs List 16 mounting plate part 17 convex part 18 gap 19 bent edge 20 concave groove
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) F25B 39/02 ──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. 7 , DB name) F25B 39/02
Claims (2)
１対のヘッダと、上下方向に亙り互いに間隔をあけて配
置され、それぞれの両端部をこれら両ヘッダ内に通じさ
せた複数の扁平伝熱管と、金属薄板を波形に形成して成
り、隣り合う扁平伝熱管同士の間に挟持されたコルゲー
ト型の伝熱フィンとを備え、上記各扁平伝熱管の風下側
端縁部を隣接する伝熱フィンの風下側端縁よりも風下側
に突出させると共に、上記各扁平伝熱管の風下側端縁に
接触若しくは近接する状態で上下方向に配置された導水
板を備え、この導水板は、互いにＶ字形に設けられた１
対の平板部と、これら両平板部同士を連続させた折り返
し部と、この折り返し部の長さ方向複数個所に形成され
た、上記各扁平伝熱管の風下側端部が進入自在な切り欠
きとを備えたものであり、これら各切り欠きの奥端部に
上記各扁平伝熱管の風下側端縁を、接触若しくは近接さ
せたルームエアコン用エバポレータ。1. A pair of left and right headers arranged at intervals in the horizontal direction, and a plurality of flattened members arranged at intervals in the vertical direction, with both ends passing through the headers. A heat transfer tube and a corrugated heat transfer fin sandwiched between adjacent flat heat transfer tubes, which are formed by forming a thin metal plate into a waveform, and adjoin the leeward edge of each of the flat heat transfer tubes. Along with projecting to the leeward side of the leeward edge of the heat transfer fins, a water guide plate is provided in the up and down direction in a state of contacting or approaching the leeward edge of each of the flat heat transfer tubes. 1 provided in a V-shape with each other
A pair of flat plate portions, a folded portion in which these two flat plate portions are continuous with each other, and a notch formed at a plurality of positions in the length direction of the folded portion, in which a leeward end of each of the flat heat transfer tubes can enter. An evaporator for a room air conditioner in which the leeward side edge of each of the flat heat transfer tubes is brought into contact with or close to the deep end of each of the notches.
く、風下側が低くなる様に傾斜させた、請求項１に記載
したルームエアコン用エバポレータ。2. The evaporator for a room air conditioner according to claim 1, wherein the upper and lower surfaces of each of the flat heat transfer tubes are inclined such that the windward side is high and the leeward side is low.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14166695A JP3359466B2 (en) | 1995-06-08 | 1995-06-08 | Evaporator for room air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14166695A JP3359466B2 (en) | 1995-06-08 | 1995-06-08 | Evaporator for room air conditioner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08334277A JPH08334277A (en) | 1996-12-17 |
| JP3359466B2 true JP3359466B2 (en) | 2002-12-24 |
Family
ID=15297363
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14166695A Expired - Fee Related JP3359466B2 (en) | 1995-06-08 | 1995-06-08 | Evaporator for room air conditioner |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3359466B2 (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4098495B2 (en) * | 2001-06-22 | 2008-06-11 | カルソニックカンセイ株式会社 | Air conditioner for vehicles |
| JP4529459B2 (en) * | 2004-01-30 | 2010-08-25 | パナソニック株式会社 | Air conditioner |
| JP2010019534A (en) * | 2008-07-14 | 2010-01-28 | Daikin Ind Ltd | Heat exchanger |
| JP5172772B2 (en) * | 2009-04-24 | 2013-03-27 | シャープ株式会社 | Heat exchanger and air conditioner equipped with the same |
| JP6136124B2 (en) * | 2012-06-14 | 2017-05-31 | 株式会社富士通ゼネラル | Heat exchanger manufacturing method and heat exchanger |
| JP2013257109A (en) * | 2012-06-14 | 2013-12-26 | Fujitsu General Ltd | Heat exchanger |
| JP2013255940A (en) * | 2012-06-14 | 2013-12-26 | Fujitsu General Ltd | Manufacturing method for heat exchanger and the heat exchanger |
| CN102889820B (en) * | 2012-10-15 | 2016-03-02 | 杭州三花微通道换热器有限公司 | For condensate water guide structure and the heat exchanger of heat exchanger |
| CN104870922B (en) * | 2012-12-21 | 2017-12-08 | 特灵国际有限公司 | Condensate drain of heat exchanger coils and preparation method thereof |
| KR101730172B1 (en) * | 2015-08-03 | 2017-04-25 | 동환산업 주식회사 | Evaporator for vehicle air conditioner with vertical structure of header pipe |
-
1995
- 1995-06-08 JP JP14166695A patent/JP3359466B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH08334277A (en) | 1996-12-17 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |