蓄冷材容器(18)の容器本体部(22)内には、オフセット状のアルミニウム製インナーフィン(32)が、上下方向のほぼ全体にわたって配置されている。インナーフィン(32)は、上下方向にのびる波頂部(33a)、上下方向にのびる波底部(33b)、および波頂部(33a)と波底部(33b)とを連結する連結部(33c)からなる波状帯板(33)が、上下方向に複数並べられるとともに相互に一体に連結されることにより形成され、上下方向に隣り合う２つの波状帯板(33)の波頂部(33a)どうしおよび波底部(33b)どうしが通風方向に位置ずれしているものである。波状帯板(33)の連結部(33c)は、蓄冷材封入部(26)の側壁(27)と蓄冷材封入部(26)内の蓄冷材との間で伝熱を行う伝熱部となっており、連結部(33c)の左右いずれか一端（ここでは右端）に設けられた波頂部(33a)、および同他端(ここでは左端)に設けられた波底部(33b)の少なくとも一部は、蓄冷材容器(18)の蓄冷材封入部(26)の容器本体部(22)に存在する部分の左右両側壁(27)にろう付されている。この実施形態においては、波状帯板(33)の波頂部(33a)および波底部(33b)は、通風方向に延びる垂直面上に位置する壁状部であり、連結部(33c)は左右方向に延びる垂直面上に位置する壁状部である。
In the container main body portion (22) of the cool storage material container (18), an offset aluminum inner fin (32) is disposed over substantially the entire vertical direction. The inner fin (32) includes a wave crest portion (33a) extending in the vertical direction, a wave bottom portion (33b) extending in the vertical direction, and a connecting portion (33c) connecting the wave crest portion (33a) and the wave bottom portion (33b). A plurality of corrugated strips (33) are arranged in the vertical direction and are integrally connected to each other, and are formed by connecting the corrugated strips (33) adjacent to each other in the vertical direction. (33b) The two are displaced in the ventilation direction. The connecting portion (33c) of the corrugated strip (33) includes a heat transfer portion that transfers heat between the side wall (27) of the cool storage material enclosure (26) and the cool storage material in the cool storage material enclosure (26). At least one of a wave crest (33a) provided at one of the left and right ends (here, the right end) of the connecting portion (33c) and a wave bottom (33b) provided at the other end (here, the left end). The part is brazed to the left and right side walls (27) of the portion of the cool storage material enclosure (26) of the cool storage material container (18) that exists in the container main body (22). In this embodiment, the wave crest portion (33a) and the wave bottom portion (33b) of the corrugated strip (33) are wall-like portions located on a vertical plane extending in the ventilation direction, and the connecting portion (33c) is the left-right direction. It is a wall-shaped part located on the vertical surface extended in.
図３および図４に示すように、凝縮水排水溝(28)における冷媒流通管(13)側を向いた開口が冷媒流通管(13)により塞がれている閉塞部分(31)において、閉塞部分(31)の通風方向の範囲内に冷媒流通管(13)の２以上の仕切壁(16)が存在している。また、閉塞部分(31)において、インナーフィン(31)の波状帯板(33)の伝熱部である連結部(33c)は、波頂部(33a)および波底部(33b)のうちのいずれか一方を介して蓄冷材容器(18)の蓄冷材封入部(26)の左右両側壁(27)のうちのいずれか一方の側壁(27)における凝縮水排水溝(28)の閉塞部分(31)の底壁となる部分のみに接合されるとともに、同他方の側壁(27)とは離隔している。さらに、冷媒流通管(13)の周壁の肉厚をｔ１ｍｍ、蓄冷材容器(18)の蓄冷材封入部(26)の側壁(27)における凝縮水排水溝(28)の底壁となる部分の肉厚をｔ２ｍｍ、凝縮水排水溝(28)の深さをＨｍｍとした場合、ｔ１＜ｔ２、２・ｔ１＞ｔ２、Ｈ＞ｔ１＋ｔ２という関係を満たしている。
As shown in FIGS. 3 and 4, in the closed portion opening facing the refrigerant flow pipe (13) side in the condensed water drain groove (28) is closed by a refrigerant flow pipe (13) (31), closed Two or more partition walls (16) of the refrigerant flow pipe (13) exist within the range of the portion (31) in the ventilation direction. Further, in the closed part (31), the connecting part (33c) which is the heat transfer part of the corrugated strip (33) of the inner fin (31) is one of the wave peak part (33a) and the wave bottom part (33b). The closed portion (31) of the condensate drainage groove (28) on one of the left and right side walls (27) of the cold storage material enclosure (26) of the cold storage material container (18) through one side It is joined only to the part which becomes the bottom wall, and is separated from the other side wall (27). Further, the wall thickness of the peripheral wall of the refrigerant flow pipe (13) is t1 mm, and the bottom wall of the condensate drainage groove (28) in the side wall (27) of the cool storage material enclosure (26) of the cool storage material container (18) is formed. When the thickness is t2 mm and the depth of the condensate drainage groove (28) is Hmm, the relationship of t1 <t2, 2.t1> t2, and H> t1 + t2 is satisfied.
上述した蓄冷機能付きエバポレータ(1)は、車両のエンジンを駆動源とする圧縮機、圧縮機から吐出された冷媒を冷却するコンデンサ（冷媒冷却器）、およびコンデンサを通過した冷媒を減圧する膨張弁（減圧器）とともに冷凍サイクルを構成し、カーエアコンとして、停車時に圧縮機の駆動源であるエンジンを一時的に停止させる車両、たとえば自動車に搭載される。圧縮機が作動している場合には、圧縮機で圧縮されてコンデンサおよび膨張弁を通過した低圧の気液混相の２相冷媒が、冷媒入口(7)を通って蓄冷機能付きエバポレータ(1)の風下側上ヘッダ部(5)内に入り、全冷媒流通管(13)を通って風上側上ヘッダ部(6)の冷媒出口(8)から流出する。そして、冷媒が冷媒流通管(13)内を流れる間に第２間隙(17B)を通過する空気と熱交換をし、冷媒は気相となって流出する。
The evaporator with a cold storage function (1) described above includes a compressor that uses a vehicle engine as a drive source, a condenser that cools the refrigerant discharged from the compressor (refrigerant cooler), and an expansion valve that decompresses the refrigerant that has passed through the condenser. The refrigeration cycle is configured together with the (decompressor) and is mounted as a car air conditioner on a vehicle, for example, an automobile, that temporarily stops the engine that is a drive source of the compressor when the vehicle stops. When the compressor is operating, the low-pressure gas-liquid mixed-phase two-phase refrigerant compressed by the compressor and passed through the condenser and the expansion valve passes through the refrigerant inlet (7) and the evaporator with the cold storage function (1) Enters the leeward upper header portion (5) and flows out from the refrigerant outlet (8) of the leeward upper header portion (6) through the entire refrigerant flow pipe (13). And while a refrigerant | coolant flows through the inside of a refrigerant | coolant distribution pipe | tube (13), it heat-exchanges with the air which passes 2nd clearance gap (17B), and a refrigerant | coolant flows out into a gaseous phase.