JP6486223B2 - Evaporator - Google Patents
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- JP6486223B2 JP6486223B2 JP2015131515A JP2015131515A JP6486223B2 JP 6486223 B2 JP6486223 B2 JP 6486223B2 JP 2015131515 A JP2015131515 A JP 2015131515A JP 2015131515 A JP2015131515 A JP 2015131515A JP 6486223 B2 JP6486223 B2 JP 6486223B2
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この発明は、たとえば自動車に搭載される冷凍サイクルである車両用空調装置に好適に使用されるエバポレータに関する。 The present invention relates to an evaporator suitably used for a vehicle air conditioner that is a refrigeration cycle mounted on an automobile, for example.
この明細書および特許請求の範囲において、各図面の上下、左右を上下、左右というものとする。 In this specification and claims, the upper and lower sides and the left and right sides of each drawing are referred to as up and down and left and right.
車両用空調装置に使用されるエバポレータとして、長手方向を上下方向に向けた状態で左右方向に間隔をおいて配置された複数の熱交換チューブからなり、かつ通風方向に並んだ風下側チューブ列および風上側チューブ列と、風下側チューブ列の熱交換チューブの上下両端側に長手方向を左右方向に向けて配置され、かつ風下側チューブ列の全熱交換チューブが接続された風下側上ヘッダ部および風下側下ヘッダ部と、風上側チューブ列の熱交換チューブの上下両端側に長手方向を左右方向に向けて配置され、かつ風上側チューブ列の全熱交換チューブが接続された風上側上ヘッダ部および風上側下ヘッダ部とを備えており、風下側上ヘッダ部の一端部に冷媒入口が設けられるとともに、風上側上ヘッダ部の冷媒入口と同一端部に冷媒出口が設けられ、風下側チューブ列に、複数の熱交換チューブからなる第１〜第３のチューブ群が、冷媒入口側端部から他端側に向かって並んで設けられ、風上側チューブ列に、複数の熱交換チューブからなる第４および第５のチューブ群が、冷媒出口と反対側の端部から冷媒入口側端部に向かって並んで設けられ、第１チューブ群が冷媒が最初に流れる第１パスになるとともに、第５チューブ群が冷媒が最後に流れる最終パスとなり、第１チューブ群、第３チューブ群および第４チューブ群において、冷媒が熱交換チューブ内を上から下に流れ、第２チューブ群および第５チューブ群において、冷媒が熱交換チューブ内を下から上に流れ、第１チューブ群と第２チューブ群とを合わせた左右方向の寸法が第５チューブ群の左右方向の寸法と等しくなっているとともに、第３チューブ群および第４チューブ群の左右方向の寸法が等しくなっており、第５チューブ群の左右方向の寸法が全体幅の１／２よりも大きくなり、風下側上ヘッダ部に、第１チューブ群の熱交換チューブが通じる第１区画と、第２および第３チューブ群の熱交換チューブが通じる第２区画とが設けられ、風下側下ヘッダ部に、第１および第２チューブ群の熱交換チューブが通じる第３区画と、第３チューブ群の熱交換チューブが通じる第４区画とが設けられ、風上側下ヘッダ部に、第４および第５チューブ群の熱交換チューブが通じる第５区画が設けられ、風上側上ヘッダ部に、第４チューブ群の熱交換チューブが通じる第６区画と、第５チューブ群の熱交換チューブが通じる第７区画とが設けられ、第２区画における第３チューブ群の熱交換チューブが通じている部分と第６区画とが相互に連通させられるとともに、第４区画と第５区画における第４チューブ群の熱交換チューブが通じている部分とが相互に連通させられているエバポレータが知られている（特許文献１参照）。 As an evaporator used in a vehicle air conditioner, a leeward side tube row composed of a plurality of heat exchange tubes arranged at intervals in the left-right direction with the longitudinal direction oriented in the up-down direction and arranged in the ventilation direction, and The leeward side upper header section, which is disposed on the upper and lower end sides of the heat exchange tubes of the leeward side tube row and the upper and lower ends thereof in the longitudinal direction, and to which all the heat exchange tubes of the leeward side tube row are connected, and The leeward lower header section and the windward upper header section that is disposed on both upper and lower ends of the heat exchange tubes in the windward tube row with the longitudinal direction oriented in the left-right direction, and to which all the heat exchange tubes in the windward tube row are connected. And a windward upper header part, a refrigerant inlet is provided at one end of the leeward upper header part, and a refrigerant outlet is provided at the same end as the refrigerant inlet of the windward upper header part. In the leeward side tube row, first to third tube groups including a plurality of heat exchange tubes are provided side by side from the refrigerant inlet side end to the other end side, and a plurality of windward side tube rows are provided in the leeward side tube row. 4th and 5th tube groups which consist of this heat exchange tube are provided along from the edge part on the opposite side to a refrigerant outlet toward a refrigerant inlet side edge part, and the 1st tube group is the 1st through which a refrigerant flows first. The fifth tube group becomes the final path through which the refrigerant flows last, and in the first tube group, the third tube group, and the fourth tube group, the refrigerant flows from the top to the bottom in the heat exchange tube, In the tube group and the fifth tube group, the refrigerant flows from the bottom to the top in the heat exchange tube, and the horizontal dimension of the first tube group and the second tube group is the same as the horizontal dimension of the fifth tube group. equally And the horizontal dimensions of the third tube group and the fourth tube group are equal, and the horizontal dimension of the fifth tube group is larger than ½ of the overall width. The section is provided with a first section through which the heat exchange tubes of the first tube group communicate and a second section through which the heat exchange tubes of the second and third tube groups communicate with each other. The third section through which the heat exchange tubes of the two tube groups communicate and the fourth section through which the heat exchange tubes of the third tube group communicate, and the heat exchange tubes of the fourth and fifth tube groups are provided on the windward lower header portion. A fifth section through which the heat exchange tube of the fourth tube group communicates, and a seventh section through which the heat exchange tube of the fifth tube group communicates, In two sections The portion where the heat exchange tube of the third tube group communicates with the sixth section and the portion where the heat exchange tube of the fourth tube group in the fourth section and the fifth section communicate with each other. There is known an evaporator communicated with (see Patent Document 1).
特許文献１記載のエバポレータによれば、スーパーヒート領域が生じる第５チューブ群での通路抵抗の増加を抑制することが可能になる。しかしながら、第５チューブ群にスーパーヒート領域が生じるので、圧縮機のオフ時に、第５チューブ群の隣り合う熱交換チューブ間の通風間隙を通過した直後の空気の温度が、他のチューブ群の隣り合う熱交換チューブ間の通風間隙を通過した直後の空気の温度よりも高くなる。また、圧縮機のオフ時においても、第３および第４チューブ群の熱交換チューブ内には冷媒が残りやすいので、両チューブ群の隣り合う熱交換チューブ間の通風間隙を通過した直後の空気の温度は比較的低くなる。したがって、エバポレータを通過した直後の空気の温度が左右方向に不均一になる。
According to the evaporator of
ところで、車両用空調装置においては、エバポレータの幅方向の一方の半部における車両中央部側を通過した空気が、ダクトを通して車両中央部に設けられた吹き出し口から運転席に向かって吹き出され、同じく窓側を通過した空気が、ダクトを通して窓側に設けられた吹き出し口から運転席に向かって吹き出されるようになっている。また、エバポレータの幅方向の他方の半部における車両中央部側を通過した空気が、ダクトを通して車両中央部に設けられた吹き出し口から助手席に向かって吹き出され、同じく窓側を通過した空気が、ダクトを通して窓側に設けられた吹き出し口から助手席に向かって吹き出されるようになっている。その結果、エバポレータを通過した空気を窓側に設けられた吹き出し口に導くダクトの長さが、車両中央部に設けられた吹き出し口に導くダクトの長さよりもかなり長くなり、しかもダクトを通過する間に空気は暖められるので、窓側に設けられた吹き出し口から吹き出される空気が暖められる度合いが、車両中央部に設けられた吹き出し口から吹き出される空気が暖められる度合いよりも高くなる。 By the way, in the vehicle air conditioner, the air that has passed through the central part of the vehicle in one half of the evaporator in the width direction is blown out from the air outlet provided in the central part of the vehicle through the duct toward the driver's seat. The air that has passed through the window is blown out from the outlet provided on the window side through the duct toward the driver's seat. In addition, the air that has passed through the center of the vehicle in the other half of the evaporator in the width direction is blown out from the outlet provided in the center of the vehicle through the duct toward the passenger seat, and the air that has also passed through the window is The air is blown out from the air outlet provided on the window side through the duct toward the passenger seat. As a result, the length of the duct that guides the air that has passed through the evaporator to the outlet provided on the window side is considerably longer than the length of the duct that leads to the outlet provided in the center of the vehicle, and while passing through the duct. Since the air is warmed, the degree of warming of the air blown from the air outlet provided on the window side is higher than the degree of warming of the air blown from the air outlet provided in the center of the vehicle.
すなわち、特許文献１記載のエバポレータにおいては、第１チューブ群と第２チューブ群とを合わせた左右方向の寸法が第５チューブ群の左右方向の寸法と等しくなっているとともに、第３チューブ群および第４チューブ群の左右方向の寸法が等しくなっており、しかも第５チューブ群の左右方向の寸法が全体幅の１／２よりも大きくなるので、運転席または助手席のうちのいずれか一方に、第５チューブ群、第１チューブ群および第２チューブ群の隣り合う熱交換チューブ間の通風間隙を通過した空気が、車両中央部および窓側の吹き出し口から吹き出され、運転席または助手席のうちのいずれか他方に、第５チューブ群および第２チューブ群の隣り合う熱交換チューブ間の通風間隙を通過した空気が、車両中央部の吹き出し口から吹き出されるとともに、第３チューブ群および第４チューブ群の隣り合う熱交換チューブ間の通風間隙を通過した空気が、窓側の吹き出し口から吹き出されることになる。したがって、特許文献１記載のエバポレータを通過した直後の空気の温度が左右方向に不均一であること、および車室内に吹き出される空気がダクトを通過する間に暖められるとともに、車両中央部および窓側の吹き出し口に空気を送るダクトを通過する際の暖められる度合いが異なることに起因して、４カ所から車室内に吹き出される空気の温度のばらつきが大きくなり、乗員の快適性を損なうおそれがある。
That is, in the evaporator described in
そこで、このような問題を解決したエバポレータとして、本出願人は、先に、長手方向を上下方向に向けた状態で左右方向に間隔をおいて配置された複数の熱交換チューブからなり、かつ通風方向に並んだ風下側チューブ列および風上側チューブ列と、風下側チューブ列の熱交換チューブの長手方向両端側に長手方向を左右方向に向けて配置され、かつ風下側チューブ列の全熱交換チューブが接続された風下側下ヘッダ部および風下側上ヘッダ部と、風上側チューブ列の熱交換チューブの長手方向両端側に長手方向を左右方向に向けて配置され、かつ風上側チューブ列の全熱交換チューブが接続された風上側下ヘッダ部および風上側上ヘッダ部とを備えたエバポレータであって、風下側チューブ列に、連続して並んだ複数の熱交換チューブからなる第１〜第５の５つのチューブ群が、第１チューブ群が左右方向中央に位置するとともに第２および第３チューブ群が第１チューブ群の左右両側に位置し、さらに第４および第５チューブ群が左右両端に位置するように設けられ、風上側チューブ列に、第６〜第８の３つのチューブ群が、第８チューブ群が左右方向中央に位置するとともに、第６および第７チューブ群が左右両端に位置するように設けられ、風下側チューブ列の第１チューブ群が、冷媒が最初に流れる第１パスになるとともに、風上側チューブ列の第８チューブ群が冷媒が最後に流れる最終パスとなり、風下側チューブ列において、第１チューブ群から左右両端の第４および第５チューブ群に向かって冷媒が順次流れるとともに、風上側チューブ列において、左右両端の第６および第７チューブ群から最終パスとなる第８チューブ群に向かって冷媒が順次流れるようになされ、風下側チューブ列および風上側チューブ列の左右両端に位置するチューブ群における冷媒の流れ方向が同一であるとともに、当該両チューブ群により１つのパスが構成され、風下側下ヘッダ部に、冷媒入口が設けられるとともに第１チューブ群の熱交換チューブが通じる第１区画と、第２および第４チューブ群の熱交換チューブが通じる第２区画と、第３および第５チューブ群の熱交換チューブが通じる第３区画とが設けられ、風下側上ヘッダ部に、第１〜第３チューブ群の熱交換チューブが通じる第４区画と、第４チューブ群の熱交換チューブが通じる第５区画と、第５チューブ群の熱交換チューブが通じる第６区画とが設けられ、風上側下ヘッダ部に、第６チューブ群の熱交換チューブが通じる第７区画と、第７チューブ群の熱交換チューブが通じる第８区画と、冷媒出口が設けられるとともに第８チューブ群の熱交換チューブが通じる第９区画とが設けられ、風上側上ヘッダ部に、第６チューブ群の熱交換チューブが通じる第１０区画と、第７チューブ群の熱交換チューブが通じる第１１区画と、第８チューブ群の熱交換チューブが通じる第１２区画とが設けられるとともに、第１０および第１１区画と第１２区画とが通じさせられ、風下側下ヘッダ部の第２区画における第４チューブ群の熱交換チューブが連通している部分と、風上側下ヘッダ部の第７区画とが通じさせられ、風下側下ヘッダ部の第３区画における第５チューブ群の熱交換チューブが連通している部分と、風上側下ヘッダ部の第８区画とが通じさせられ、風下側上ヘッダ部の第５区画と風上側上ヘッダ部の第１０区画、および風下側上ヘッダ部の第６区画と風上側上ヘッダ部の第１１区画とがそれぞれ通じさせられ、第１〜第３チューブ群の左右方向の合計幅が、第８チューブ群の左右方向の幅と同一であり、第４チューブ群および第６チューブ群の左右方向の幅が同一であり、第５チューブ群および第７チューブ群の左右方向の幅が同一であり、第４チューブ群と第６チューブ群、および第５チューブ群と第７チューブ群とが通風方向に並ぶとともに、通風方向に並んだ２つのチューブ群での冷媒の流れ方向が同一となり、第４チューブ群と第６チューブ群、および第５チューブ群と第７チューブ群によりそれぞれ１つの熱交換パスが構成され、他のチューブ群がそれぞれ１つの熱交換パスを構成しているエバポレータを提案した(特許文献２参照)。 Therefore, as an evaporator that has solved such a problem, the present applicant has previously formed a plurality of heat exchange tubes arranged at intervals in the left-right direction with the longitudinal direction directed in the up-down direction, and the ventilation is performed. The leeward side tube row and the leeward side tube row arranged in the direction, and the total heat exchange tubes of the leeward side tube row that are arranged with the longitudinal direction facing the left and right sides at both longitudinal ends of the heat exchange tubes of the leeward side tube row Are connected to the both ends in the longitudinal direction of the heat exchange tubes of the windward side tube row, and the total heat of the windward side tube row is arranged. An evaporator having an upwind lower header section and an upwind header section to which an exchange tube is connected, and a plurality of heat exchange tubes arranged in a row on the leeward tube row The first to fifth five tube groups are such that the first tube group is located at the center in the left-right direction, the second and third tube groups are located on the left and right sides of the first tube group, and the fourth and fifth The tube groups are provided so as to be positioned at both left and right ends, the sixth to eighth tube groups are arranged in the windward tube row, the eighth tube group is positioned at the center in the left-right direction, and the sixth and seventh tubes. The first tube group in the leeward tube row is the first path through which the refrigerant flows first, and the eighth tube group in the windward tube row flows last in the first tube group of the leeward tube row. In the leeward side tube row, the refrigerant sequentially flows from the first tube group toward the fourth and fifth tube groups at the left and right ends. The refrigerant sequentially flows from the 6th and 7th tube groups toward the 8th tube group as the final pass, and the flow direction of the refrigerant in the tube groups located at the left and right ends of the leeward side tube row and the upside tube row is the same. In addition, a single path is constituted by both the tube groups, a first section in which a refrigerant inlet is provided in the leeward lower header portion and a heat exchange tube of the first tube group communicates, and second and fourth tubes A second section through which the heat exchange tubes of the group communicate and a third section through which the heat exchange tubes of the third and fifth tube groups communicate, and heat exchange of the first to third tube groups in the leeward upper header section A fourth compartment through which the tubes communicate, a fifth compartment through which the heat exchange tubes of the fourth tube group communicate, and a sixth compartment through which the heat exchange tubes of the fifth tube group communicate; The upper lower header portion is provided with a seventh section through which the heat exchange tube of the sixth tube group communicates, an eighth section through which the heat exchange tube of the seventh tube group communicates, a refrigerant outlet, and a heat exchange tube of the eighth tube group And a ninth section through which the heat exchange tube of the sixth tube group communicates, an eleventh section through which the heat exchange tube of the seventh tube group communicates, and an eighth tube. A heat exchanger tube of the fourth tube group in the second compartment of the leeward side lower header portion is provided. Is connected to the seventh section of the leeward lower header part and the heat exchange tube of the fifth tube group in the third section of the leeward lower header part is communicated , The eighth section of the leeward lower header section is communicated, the fifth section of the leeward upper header section and the tenth section of the leeward upper header section, and the sixth section of the leeward upper header section and the upper windward section. The eleventh section of the header portion is connected to each other, the total width in the left-right direction of the first to third tube groups is the same as the width in the left-right direction of the eighth tube group, and the fourth tube group and the sixth tube The horizontal widths of the groups are the same, the horizontal widths of the fifth tube group and the seventh tube group are the same, the fourth tube group and the sixth tube group, and the fifth tube group and the seventh tube group. Are arranged in the ventilation direction, and the flow directions of the refrigerant in the two tube groups arranged in the ventilation direction are the same, and each of the fourth tube group and the sixth tube group, and the fifth tube group and the seventh tube group, respectively. Consists of two heat exchange paths Is proposed an evaporator which another tube group constitute a single heat exchange path, respectively (see Patent Document 2).
特許文献２記載のエバポレータによれば、冷媒が最後に流れる最終パスとなる風上側チューブ列の左右方向中央部のチューブ群の隣り合う熱交換チューブ間の通風間隙を通過した比較的高温の空気が、比較的短いダクトを通して運転席および助手席の車両中央部に設けられた吹き出し口に送られ、風上側チューブ列の左右方向中央部のチューブ群における左右両端寄りの部分に位置する一部の隣り合う熱交換チューブ間の通風間隙を通過した空気、および風下側チューブ列および風上側チューブ列の左右両端に位置するチューブ群の隣り合う熱交換チューブ間の通風間隙を通過した比較的低温の空気が、比較的長いダクトを通して運転席および助手席の窓側に設けられた吹き出し口に送られる。したがって、運転席および助手席の窓側の吹き出し口から吹き出される空気のエバポレータ通過直後の温度が、運転席および助手席の車両中央部の吹き出し口から吹き出される空気のエバポレータ通過直後の温度よりも低くなる。そして、運転席および助手席の窓側の吹き出し口に送られる空気が暖められる度合いが、車両中央部の吹き出し口に送られる空気が暖められる度合いよりも高くなるのであるから、運転席の車両中央部および窓側の吹き出し口、ならびに助手席の車両中央部および窓側の吹き出し口から吹き出される空気の温度が均一化され、４カ所から車室内に吹き出される空気の温度のばらつきが低減されて、乗員の快適性の低下を抑制することができる。
According to the evaporator described in
しかしながら、特許文献２記載のエバポレータの場合、圧縮機のオン時に、冷媒入口から第１区画内に流入した冷媒は、第１チューブ群からなる第１パスを流れた後に左右に分流し、左側においては第２チューブ群からなる熱交換パスと、第４および第６チューブ群からなる熱交換パスを順次流れた後に第９区画内に入り、右側においては第３チューブ群からなる熱交換パスと、第５および第７チューブ群からなる熱交換パスを順次流れた後に第９区画内に入り、冷媒出口から圧縮機に向けて流出するようになされているので、次のような問題が生じるおそれがある。すなわち、エバポレータを通過する空気の風速分布が左右方向に不均一である場合、風速が速い部分では冷媒の蒸発が促進されて気相冷媒が多くなり、チューブ群の熱交換チューブを流れる際の通路抵抗が増大するので、冷媒流量が減少する。一方、風速が遅い部分では冷媒の蒸発が遅れて液相冷媒が多くなり、チューブ群の熱交換チューブを流れる際の通路抵抗の増大が抑制される。したがって、冷媒は、通路抵抗が比較的小さくなっている風速が遅い部分のチューブ群の熱交換チューブ内を多く流れることになり、エバポレータの左側を通過した空気の温度と、同じく右側を通過した空気の温度とが不均一になる。
However, in the case of the evaporator described in
この発明の目的は、上記問題を解決し、圧縮機のオン時に、エバポレータを通過してきた空気の温度である吐気温を均一化しうるエバポレータを提供することにある。 An object of the present invention is to solve the above-described problem and to provide an evaporator that can equalize the temperature of air that has passed through the evaporator when the compressor is turned on.
本発明は、前記目的を達成するために以下の態様からなる。 In order to achieve the above object, the present invention comprises the following aspects.
1)長手方向を上下方向に向けた状態で左右方向に間隔をおいて配置された複数の熱交換チューブからなり、かつ通風方向に並んだ第１チューブ列および第２チューブ列と、第１チューブ列の熱交換チューブの上下両側に長手方向を左右方向に向けて配置され、かつ第１チューブ列の全熱交換チューブが接続された第１ヘッダ部および第２ヘッダ部と、第２チューブ列の熱交換チューブの上下両側に長手方向を左右方向に向けて配置され、かつ第２チューブ列の全熱交換チューブが接続された第３ヘッダ部および第４ヘッダ部とを備えており、第１チューブ列に、連続して並んだ複数の熱交換チューブからなる５以上の奇数のチューブ群が設けられ、第２チューブ列に、連続して並んだ複数の熱交換チューブからなりかつ第１チューブ列のチューブ群よりも２つ少ない数のチューブ群が設けられ、第１チューブ列および第２チューブ列の左右両端に位置するチューブ群における冷媒の流れ方向が同一であるとともに、当該両チューブ群によりそれぞれ１つのパスが構成されているエバポレータであって、
第１チューブ列および第２チューブ列の左右いずれか同一端のチューブ群により、冷媒が最初に流れる第１パスが構成され、第２チューブ列の第１パスとなるチューブ群に隣接するチューブ群により、冷媒が最後に流れる最終パスが構成され、第１チューブ列および第２チューブ列の第１パスとは反対側の端部のチューブ群、および残りのチューブ群によりそれぞれ１つの中間パスが構成され、冷媒が、第１パスからすべての中間パスを順次流れた後最終パスを流れるようになされているエバポレータ。
1) A first tube row and a second tube row, each of which is composed of a plurality of heat exchange tubes arranged at intervals in the left-right direction with the longitudinal direction oriented in the vertical direction, and arranged in the ventilation direction, and the first tube A first header section and a second header section which are arranged on both upper and lower sides of the heat exchange tubes in the row with the longitudinal direction thereof being directed in the left-right direction, and to which the total heat exchange tubes of the first tube row are connected; The first tube includes a third header portion and a fourth header portion, which are arranged on both upper and lower sides of the heat exchange tube with the longitudinal direction being directed in the left-right direction, and to which the total heat exchange tubes of the second tube row are connected. An odd-numbered tube group of 5 or more consisting of a plurality of heat exchange tubes arranged in a row is provided, and a plurality of heat exchange tubes arranged in a row in the second tube row and the first tube row Chu There are two tube groups fewer than the tube group, the refrigerant flow directions in the tube groups located at the left and right ends of the first tube row and the second tube row are the same, and each of the tube groups has 1 each. An evaporator with two paths,
The first path through which the refrigerant first flows is constituted by the tube group at the same end on either the left or right side of the first tube row and the second tube row, and the tube group adjacent to the tube group serving as the first pass of the second tube row The final path through which the refrigerant flows last is configured, and one intermediate path is configured by the tube group at the end opposite to the first path of the first tube row and the second tube row, and the remaining tube group, respectively. The evaporator is configured such that the refrigerant flows in the final path after sequentially flowing through all the intermediate paths from the first path.
2)第１ヘッダ部が、第１チューブ列の第１パスのチューブ群の熱交換チューブが通じる区画と、第１チューブ列の第１パスのチューブ群とは反対側端部のチューブ群および当該チューブ群に隣接するチューブ群の熱交換チューブが通じる区画とを有し、
第２ヘッダ部が、第１チューブ列の第１パスのチューブ群および当該チューブ群に隣接するチューブ群の熱交換チューブが通じる区画と、第１チューブ列の第１パスのチューブ群とは反対側端部のチューブ群の熱交換チューブが通じる区画とを有し、
第３ヘッダ部が、冷媒入口が設けられるとともに第２チューブ列の第１パスのチューブ群の熱交換チューブが通じる区画と、第２チューブ列の第１パスのチューブ群とは反対側端部のチューブ群の熱交換チューブが通じる区画と、冷媒出口が設けられるとともに第２チューブ列の最終パスのチューブ群の熱交換チューブが通じる区画とを有し、
第４ヘッダ部が、第２チューブ列の第１パスのチューブ群の熱交換チューブが通じる区画と、第２チューブ列の第１パスのチューブ群とは反対側端部のチューブ群および当該チューブ群に隣接するチューブ群の熱交換チューブが通じる区画と、第２チューブ列の最終パスのチューブ群の熱交換チューブが通じる区画とを有し、
第１ヘッダ部における第１チューブ列の第１パスのチューブ群の熱交換チューブが通じる区画と、第３ヘッダ部における第２チューブ列の第１パスのチューブ群の熱交換チューブが通じる区画とが通じさせられ、第１ヘッダ部における第１チューブ列の第１パスのチューブ群とは反対側端部のチューブ群および当該チューブ群に隣接するチューブ群の熱交換チューブが通じる区画と、第３ヘッダ部における第２チューブ列の第１パスのチューブ群とは反対側端部のチューブ群の熱交換チューブが通じる区画とが通じさせられ、
第２ヘッダ部における第１チューブ列の第１パスのチューブ群および当該チューブ群に隣接するチューブ群の熱交換チューブが通じる区画と、第４ヘッダ部における第２チューブ列の第１パスのチューブ群の熱交換チューブが通じる区画とが通じさせられ、第２ヘッダ部における第１チューブ列の第１パスのチューブ群とは反対側端部のチューブ群の熱交換チューブが通じる区画と、第４ヘッダ部における第２チューブ列の第１パスのチューブ群とは反対側端部のチューブ群および当該チューブ群に隣接するチューブ群の熱交換チューブが通じる区画とが通じさせられている上記1)記載のエバポレータ。
2) The first header section includes a section through which the heat exchange tube of the tube group of the first path of the first tube row communicates, a tube group at the end opposite to the tube group of the first path of the first tube row, and A section through which the heat exchange tubes of the tube group adjacent to the tube group communicate,
A section through which the second header portion communicates with the tube group of the first path of the first tube row and the heat exchange tube of the tube group adjacent to the tube group, and the side opposite to the tube group of the first pass of the first tube row A section through which the heat exchange tubes of the end tube group communicate,
The third header portion is provided with a refrigerant inlet and a section through which the heat exchange tube of the first pass tube group of the second tube row communicates with the end portion on the opposite side of the first pass tube group of the second tube row. A section through which the heat exchange tubes of the tube group communicate, and a section through which the refrigerant outlet is provided and through which the heat exchange tubes of the tube group of the final path of the second tube row communicate,
The fourth header portion is a section through which the heat exchange tubes of the tube group of the first pass of the second tube row communicate, the tube group on the opposite side of the tube group of the first pass of the second tube row, and the tube group. A section through which the heat exchange tube of the tube group adjacent to the pipe communicates, and a section through which the heat exchange tube of the tube group of the final path of the second tube row communicates,
A section through which the heat exchange tubes of the first pass tube group of the first tube row in the first header section communicate with a section through which the heat exchange tubes of the first pass tube group of the second tube row in the third header section communicate. A section through which the heat exchange tube of the tube group adjacent to the tube group adjacent to the tube group and the tube group at the opposite end to the tube group of the first path of the first tube row in the first header portion communicates, and the third header A section through which the heat exchange tube of the tube group at the opposite end to the tube group of the first path of the second tube row in the section is communicated,
A section through which the first-pass tube group of the first tube row in the second header section and a heat exchange tube of the tube group adjacent to the tube group communicate, and a first-pass tube group of the second tube row in the fourth header portion A section through which the heat exchange tubes of the first tube row of the first header row of the second header section communicate with the heat exchange tubes of the tube group opposite to the section of the first header row, and a fourth header. The section of 1) above, wherein the tube group at the end opposite to the tube group of the first pass of the second tube row in the section and the section through which the heat exchange tube of the tube group adjacent to the tube group communicates are communicated Evaporator.
3)第１チューブ列に、第１〜第５の５つのチューブ群が、第１チューブ群が第１パスのチューブ群となるように、左右いずれか一端から他端に向かって順番に並んで設けられ、第２チューブ列に、第６〜第８の３つのチューブ群が、第６チューブ群が第１パスのチューブ群となるとともに、第７チューブ群が第２チューブ列の第１パスのチューブ群とは反対側端部のチューブ群となり、さらに第８チューブ群が左右方向中央に位置するともに最終パスのチューブ群となるように設けられ、
第１ヘッダ部に、第１チューブ群の熱交換チューブが通じる第１区画と、第２および第３チューブ群の熱交換チューブが通じる第２区画と、第４および第５チューブ群の熱交換チューブが通じる第３区画とが設けられ、第２ヘッダ部に、第１および第２チューブ群の熱交換チューブが通じる第４区画と、第３および第４チューブ群の熱交換チューブが通じる第５区画と、第５チューブ群の熱交換チューブが通じる第６区画とが設けられ、第３ヘッダ部に、冷媒入口が設けられるとともに第６チューブ群の熱交換チューブが通じる第７区画と、第７チューブ群の熱交換チューブが通じる第８区画と、冷媒出口が設けられるとともに第８チューブ群の熱交換チューブが通じる第９区画とが設けられ、第４ヘッダ部に、第６チューブ群の熱交換チューブが通じる第１０区画と、第７および第８チューブ群の熱交換チューブが通じる第１１区画とが設けられ、第１１区画が、第２チューブ列の第１パスのチューブ群とは反対側端部のチューブ群および当該チューブ群に隣接するチューブ群の熱交換チューブが通じる区画と、第２チューブ列の最終パスのチューブ群の熱交換チューブが通じる区画とを兼ねており、
第１ヘッダ部の第１区画と第３ヘッダ部の第７区画とが通じさせられ、第１ヘッダ部の第３区画における第５チューブ群の熱交換チューブが連通している部分と第３ヘッダ部の第８区画とが通じさせられ、第２ヘッダ部の第４区画における第１チューブ群の熱交換チューブが連通している部分と第４ヘッダ部の第１０区画とが通じさせられ、第２ヘッダ部の第６区画と第４ヘッダ部の第１１区画における第７チューブ群の熱交換チューブが連通している部分とが通じさせられ、
第１チューブ群および第６チューブ群により第１パスが構成され、第８チューブ群により最終パスが構成され、第５チューブ群および第７チューブ群と、第２〜第４チューブ群とによりそれぞれ中間パスが構成されている上記2)記載のエバポレータ。
3) In the first tube row, the first to fifth tube groups are arranged in order from either one of the left and right sides to the other end so that the first tube group becomes the tube group of the first pass. The sixth tube group is the first pass tube group, and the seventh tube group is the first tube pass of the second tube row. The tube group is the tube group at the end opposite to the tube group, and the eighth tube group is located at the center in the left-right direction and is provided as the tube group of the final pass,
A first section through which the heat exchange tubes of the first tube group communicate with the first header section, a second section through which the heat exchange tubes of the second and third tube groups communicate, and heat exchange tubes of the fourth and fifth tube groups A third section through which the heat exchange tubes of the first and second tube groups communicate with the second header portion, and a fifth section through which the heat exchange tubes of the third and fourth tube groups communicate. And a sixth section through which the heat exchange tube of the fifth tube group communicates, a seventh section through which the refrigerant inlet is provided at the third header portion and the heat exchange tube of the sixth tube group communicates, and a seventh tube An eighth section through which the heat exchange tubes of the group communicate, and a ninth section through which the refrigerant outlet is provided and through which the heat exchange tubes of the eighth tube group communicate. And the eleventh section through which the heat exchange tubes of the seventh and eighth tube groups communicate, and the eleventh section is the end opposite to the tube group of the first path of the second tube row. And a section through which the heat exchange tubes of the tube group adjacent to the tube group and a section through which the heat exchange tubes of the tube group in the final path of the second tube row communicate,
The first header section and the seventh section of the third header section are communicated with each other, and the third header and the portion where the heat exchange tubes of the fifth tube group in the third section of the first header section communicate with each other The eighth section of the first header group is communicated with the portion of the fourth header section of the second header section where the heat exchange tubes of the first tube group communicate with the tenth section of the fourth header section. The 6th section of the 2 header part and the part where the heat exchange tubes of the 7th tube group in the 11th section of the 4th header part are communicated,
The first pass is composed of the first tube group and the sixth tube group, the final pass is composed of the eighth tube group, and the fifth tube group, the seventh tube group, and the second to fourth tube groups are respectively intermediate. The evaporator according to 2) above, wherein the path is configured.
4)第１チューブ群および第６チューブ群の左右方向の幅が同一であり、第５チューブ群および第７チューブ群の左右方向の幅が同一であり、第２〜第４チューブ群の左右方向の合計幅が、第８チューブ群の左右方向の幅と同一である上記3)記載のエバポレータ。 4) The left and right widths of the first tube group and the sixth tube group are the same, the left and right widths of the fifth tube group and the seventh tube group are the same, and the left and right directions of the second to fourth tube groups The evaporator according to the above item 3), wherein the total width is the same as the width in the left-right direction of the eighth tube group.
5)第１チューブ列、第１ヘッダ部および第２ヘッダ部が風下側に設けられ、第２チューブ列、第３ヘッダ部および第４ヘッダ部が風上側に設けられている上記1)〜4)のうちのいずれかに記載のエバポレータ。 5) The above 1) to 4), wherein the first tube row, the first header portion and the second header portion are provided on the leeward side, and the second tube row, the third header portion and the fourth header portion are provided on the leeward side. The evaporator according to any one of the above.
6)冷媒が、第１および第２チューブ列の左右両端チューブ群の熱交換チューブ内を上から下に流れるようになっている上記1)〜5)のうちのいずれかに記載のエバポレータ。 6) The evaporator according to any one of 1) to 5) above, wherein the refrigerant flows from the top to the bottom in the heat exchange tubes of the left and right end tube groups of the first and second tube rows.
上記1)〜6)のエバポレータによれば、第１チューブ列および第２チューブ列の左右いずれか同一端のチューブ群により、冷媒が最初に流れる第１パスが構成され、第２チューブ列の第１パスとなるチューブ群に隣接するチューブ群により、冷媒が最後に流れる最終パスが構成され、第１チューブ列および第２チューブ列の第１パスとは反対側の端部のチューブ群、および残りのチューブ群によりそれぞれ１つの中間パスが構成され、冷媒が、第１パスからすべての中間パスを順次流れた後最終パスを流れるようになされているので、エバポレータを通過する空気の風速分布が左右方向に不均一であったとしても、圧縮機のオン時に、次のようにしてエバポレータを通過した空気の吐気温が左右方向に均一化される。すなわち、エバポレータを通過する空気の風速が速い部分では冷媒の蒸発が促進されて気相冷媒が多くなり、熱交換チューブを流れる際の通路抵抗が増大するが、冷媒が、第１パスからすべての中間パスを順次流れた後最終パスを流れるようになされていると、すべてのパスを構成するチューブ群の熱交換チューブを流れる冷媒の流量が均一化される。したがって、エバポレータの全部分を通過した空気の温度が均一化される。 According to the evaporators 1) to 6) described above, the first path through which the refrigerant flows first is configured by the tube groups at the left and right ends of the first tube row and the second tube row. The tube group adjacent to the tube group that forms one pass constitutes the final path through which the refrigerant flows last, the tube group at the end opposite to the first path of the first tube row and the second tube row, and the remaining Each of the tube groups constitutes one intermediate path, and the refrigerant flows through all the intermediate paths sequentially from the first path and then flows through the final path, so that the wind speed distribution of the air passing through the evaporator is Even if the direction is not uniform, when the compressor is turned on, the air discharge temperature of the air that has passed through the evaporator is made uniform in the left-right direction as follows. That is, in the part where the wind speed of the air passing through the evaporator is high, the evaporation of the refrigerant is promoted and the amount of the gas phase refrigerant increases, and the passage resistance when flowing through the heat exchange tube increases, If the flow passes through the intermediate path and then flows through the final path, the flow rate of the refrigerant flowing through the heat exchange tubes of the tube group constituting all the paths is made uniform. Therefore, the temperature of the air that has passed through the entire part of the evaporator is made uniform.
また、第２チューブ列における第１パスとなるチューブ群に隣接し、かつ冷媒が最後に流れる最終パスを構成するチューブ群にスーパーヒート領域が生じるので、圧縮機のオフ時に、最終パスとなる前記チューブ群の隣り合う熱交換チューブ間の通風間隙を通過した直後の空気の温度が、他のチューブ群の隣り合う熱交換チューブ間の通風間隙を通過した直後の空気の温度よりも高くなる。また、第１チューブ列および第２チューブ列の左右いずれか同一端のチューブ群により、冷媒が最初に流れる第１パスが構成され、第１チューブ列および第２チューブ列の第１パスとは反対側の端部のチューブ群に１つの中間パスが構成され、前記第１パスおよび前記中間パスを構成する２つのチューブ群における冷媒の流れ方向が同一であるので、圧縮機のオフ時においても、両チューブ列の左右両端のチューブ群の熱交換チューブ内には冷媒が残りやすくなり、両チューブ群の隣り合う熱交換チューブ間の通風間隙を通過した直後の空気の温度は比較的低くなる。 In addition, since a superheat region is generated in a tube group that is adjacent to the tube group that is the first pass in the second tube row and that constitutes the final pass through which the refrigerant flows, the final pass becomes when the compressor is turned off. The temperature of the air immediately after passing through the ventilation gap between adjacent heat exchange tubes of the tube group is higher than the temperature of the air immediately after passing through the ventilation gap between adjacent heat exchange tubes of another tube group. Also, the first path through which the refrigerant first flows is constituted by the tube group at the same end on either the left or right side of the first tube row and the second tube row, and is opposite to the first path of the first tube row and the second tube row. One intermediate path is formed in the tube group at the end on the side, and the flow direction of the refrigerant in the two tube groups constituting the first path and the intermediate path is the same, so even when the compressor is off, The refrigerant tends to remain in the heat exchange tubes of the tube groups at both the left and right ends of both tube rows, and the temperature of the air immediately after passing through the ventilation gap between adjacent heat exchange tubes of both tube groups becomes relatively low.
しかも、上記1)〜6)のエバポレータによれば、冷媒が最後に流れる最終パスを構成するチューブ群の隣り合う熱交換チューブ間の通風間隙を通過した比較的高温の空気が、比較的短いダクトを通して運転席および助手席の車両中央部に設けられた吹き出し口に送られ、最終パスを構成するチューブ群の左右両側のチューブ群の隣り合う熱交換チューブ間の通風間隙を通過した比較的低温の空気が、比較的長いダクトを通して運転席および助手席の窓側に設けられた吹き出し口に送られる。したがって、運転席および助手席の窓側の吹き出し口から吹き出される空気のエバポレータ通過直後の温度が、運転席および助手席の車両中央部の吹き出し口から吹き出される空気のエバポレータ通過直後の温度よりも低くなる。そして、運転席および助手席の窓側の吹き出し口に送られる空気が暖められる度合いが、車両中央部の吹き出し口に送られる空気が暖められる度合いよりも高くなるのであるから、運転席の車両中央部および窓側の吹き出し口、ならびに助手席の車両中央部および窓側の吹き出し口から吹き出される空気の温度が均一化され、４カ所から車室内に吹き出される空気の温度のばらつきが低減されて、乗員の快適性の低下を抑制することができる。 In addition, according to the evaporators 1) to 6), the relatively hot air that has passed through the ventilation gap between adjacent heat exchange tubes of the tube group constituting the final path through which the refrigerant flows last is a relatively short duct. Through the air vent between the adjacent heat exchange tubes of the tube groups on both the left and right sides of the tube group constituting the final path. Air is sent through a relatively long duct to an outlet provided on the window side of the driver's seat and passenger seat. Therefore, the temperature immediately after passing the evaporator of the air blown from the window side outlet of the driver's seat and the passenger seat is higher than the temperature immediately after passing the evaporator of the air at the center of the driver's seat and the passenger's seat. Lower. And since the degree to which the air sent to the driver side and the passenger side window side air outlet is warmed is higher than the degree to which the air sent to the air outlet at the center of the vehicle is warmed, And the temperature of air blown out from the window outlet and the center of the passenger seat and the window outlet, and the variation in the temperature of the air blown into the passenger compartment from four locations is reduced. The decrease in comfort can be suppressed.
以下、この発明の実施形態を、図面を参照して説明する。以下に述べる実施形態は、この発明によるエバポレータを車両用空調装置を構成する冷凍サイクルに適用したものである。この実施形態において、空気は、図面に矢印Ｘで示す方向に流れてエバポレータを通過し、車両用空調装置が搭載されている車両の車室内に送り込まれる。 Embodiments of the present invention will be described below with reference to the drawings. In the embodiment described below, the evaporator according to the present invention is applied to a refrigeration cycle constituting a vehicle air conditioner. In this embodiment, air flows in the direction indicated by the arrow X in the drawing, passes through the evaporator, and is sent into the vehicle interior of the vehicle in which the vehicle air conditioner is mounted.
なお、以下の説明において、「アルミニウム」という用語には、純アルミニウムの他にアルミニウム合金を含むものとする。 In the following description, the term “aluminum” includes aluminum alloys in addition to pure aluminum.
図１はこの発明のエバポレータを適用したエバポレータの全体構成を示し、図２および図３はその構成を概略的に示し、図４は図１のエバポレータにおける冷媒の流れを示す。 FIG. 1 shows the overall configuration of an evaporator to which the evaporator of the present invention is applied, FIGS. 2 and 3 schematically show the configuration, and FIG. 4 shows the flow of refrigerant in the evaporator of FIG.
図１〜図３において、エバポレータ(1)は、幅方向を図１に矢印Ｘで示す通風方向に向けるとともに長手方向を上下方向に向けた状態で左右方向に等間隔で配置された複数のアルミニウム製熱交換チューブ(2)からなる風下側チューブ列(3)（第１チューブ列）および風上側チューブ列(4)（第２チューブ列）と、風下側チューブ列(3)の熱交換チューブ(2)の上下両端側に長手方向を左右方向に向けて配置され、かつ風下側チューブ列(3)の全熱交換チューブ(2)が接続されたアルミニウム製風下側上ヘッダ部(5)（第１ヘッダ部）およびアルミニウム製風下側下ヘッダ部(6)（第２ヘッダ部）と、風上側チューブ列(4)の熱交換チューブ(2)の上下両端側に長手方向を左右方向に向けて配置され、かつ風上側チューブ列(4)の全熱交換チューブ(2)が接続されたアルミニウム製風上側上ヘッダ部(7)（第３ヘッダ部）および風上側下ヘッダ部(8)（第４ヘッダ部）とを備えている。風下側チューブ列(3)および風上側チューブ列(4)における熱交換チューブ(2)の数と、隣り合う熱交換チューブ(2)間の間隔は等しくなっている。 1 to 3, the evaporator (1) has a plurality of aluminum layers arranged at equal intervals in the left-right direction with the width direction directed in the ventilation direction indicated by the arrow X in FIG. 1 and the longitudinal direction directed in the vertical direction. The leeward side tube row (3) (first tube row) and the leeward side tube row (4) (second tube row) comprising the heat exchange tubes (2) and the heat exchange tubes (3) of the leeward side tube row (3) 2) An aluminum leeward upper header section (5) (first) arranged on both upper and lower ends of the leeward side, with the longitudinal direction oriented in the left-right direction and connected to the total heat exchange tube (2) of the leeward tube row (3) 1 header part) and aluminum leeward lower header part (6) (second header part), and the upper and lower ends of the heat exchange tubes (2) of the windward tube row (4) with the longitudinal direction facing left and right Aluminum which is arranged and connected to the total heat exchange tube (2) of the windward tube row (4) Includes um manufactured windward upper header portion (7) (third header portion) and the windward lower header section (8) (4 header portion). The number of heat exchange tubes (2) in the leeward side tube row (3) and the windward side tube row (4) is equal to the interval between the adjacent heat exchange tubes (2).
両チューブ列(3)(4)の隣接する熱交換チューブ(2)どうしの間の通風間隙(9)および左右両端の熱交換チューブ(2)の外側に、それぞれ両チューブ列(3)(4)の熱交換チューブ(2)に跨って共有されるようにアルミニウム製コルゲートフィン(11)が配置されて両熱交換チューブ(2)にろう付され、左右両端のコルゲートフィン(11)の外側にそれぞれアルミニウム製サイドプレート(12)が配置されてコルゲートフィン(11)にろう付されている。左右両端の熱交換チューブ(2)とサイドプレート(12)との間も通風間隙(9)となっている。両チューブ列(3)(4)の隣接する熱交換チューブ(2)どうしの間の通風間隙(9)を通過した空気は、車両用空調装置が搭載されている車両の車室内に送り込まれる。 Both tube rows (3) (4) are placed outside the ventilation gap (9) between adjacent heat exchange tubes (2) of both tube rows (3) and (4) and outside the heat exchange tubes (2) on both left and right ends. The aluminum corrugated fins (11) are placed so as to be shared across the heat exchange tubes (2) and brazed to both heat exchange tubes (2), and the outer sides of the corrugated fins (11) at the left and right ends. Aluminum side plates (12) are respectively disposed and brazed to the corrugated fins (11). A ventilation gap (9) is also formed between the heat exchange tubes (2) at the left and right ends and the side plates (12). The air that has passed through the ventilation gap (9) between the adjacent heat exchange tubes (2) in the tube rows (3) and (4) is sent into the vehicle compartment of the vehicle in which the vehicle air conditioner is mounted.
風下側チューブ列(3)に、連続して並んだ複数の熱交換チューブ(2)からなる５以上の奇数、ここでは第１〜第５の５つチューブ群(13)(14)(15)(16)(17)が設けられ、風上側チューブ列(4)に、連続して並んだ複数の熱交換チューブ(2)からなりかつ風下側チューブ列(3)のチューブ群(13)(14)(15)(16)(17)よりも２つ少ない数、ここでは第６〜第８の３つのチューブ群(18)(19)(21)が設けられている。 An odd number of 5 or more consisting of a plurality of heat exchange tubes (2) arranged in series in the leeward side tube row (3), here, the first to fifth five tube groups (13), (14), (15) (16) (17) is provided, and the tube group (13) (14) of the plurality of heat exchange tubes (2) arranged continuously in the windward tube row (4) and in the leeward tube row (3). ), (15), (16), and (17), a number that is two less, here, six to eighth tube groups (18), (19), and (21) are provided.
風下側チューブ列(3)においては、第１〜第５チューブ群(13)(14)(15)(16)(17)は左端部から順に並んで設けられている。風上側チューブ列(4)においては、第６および第７チューブ群(18)(19)は左右両端部に設けられ、第８チューブ群(21)は左右方向の中央部に設けられている。第１チューブ群(13)および第６チューブ群(18)の左右方向の幅と、両チューブ群(13)(18)に含まれる熱交換チューブ(2)の数とは同一であることが好ましく、第５チューブ群(17)および第７チューブ群(19)の左右方向の幅と、両チューブ群(17)(19)に含まれる熱交換チューブ(2)の数とは同一であることが好ましい。また、第２〜第４チューブ群(14)(15)(16)の左右方向の合計幅およびこれらチューブ群(14)(15)(16)に含まれる熱交換チューブ(2)の合計数と、第８チューブ群(21)の左右方向の幅および第８チューブ群(21)に含まれる熱交換チューブ(2)の数とは同一であることが好ましい。さらに、風下側チューブ列(3)の５つのチューブ群(13)(14)(15)(16)(17)の幅および各チューブ群(13)(14)(15)(16)(17)に含まれる熱交換チューブ(2)の数は、第１チューブ群(13)から第５チューブ群(17)にかけて徐々に増大していることが好ましい。 In the leeward tube row (3), the first to fifth tube groups (13), (14), (15), (16), and (17) are provided in order from the left end. In the windward tube row (4), the sixth and seventh tube groups (18) and (19) are provided at both left and right ends, and the eighth tube group (21) is provided at the center in the left and right direction. The horizontal width of the first tube group (13) and the sixth tube group (18) is preferably the same as the number of heat exchange tubes (2) included in both the tube groups (13) and (18). The horizontal width of the fifth tube group (17) and the seventh tube group (19) and the number of heat exchange tubes (2) included in both the tube groups (17) and (19) may be the same. preferable. Further, the total width in the left-right direction of the second to fourth tube groups (14), (15), and (16) and the total number of heat exchange tubes (2) included in these tube groups (14), (15), and (16) The width in the left-right direction of the eighth tube group (21) and the number of heat exchange tubes (2) included in the eighth tube group (21) are preferably the same. In addition, the width of the five tube groups (13), (14), (15), (16), and (17) in the leeward tube row (3) and the tube groups (13), (14), (15), (16), and (17) It is preferable that the number of heat exchange tubes (2) included in is gradually increased from the first tube group (13) to the fifth tube group (17).
なお、第２〜第４の各チューブ群(14)(15)(16)の左右方向の幅が等しくなっているとともに含まれる熱交換チューブ(2)の数が等しくなっていてもよい。この場合にも、左右方向の幅は、第１チューブ群(13)が第２チューブ群(14)よりも狭くなっているとともに第５チューブ群(17)が第４チューブ群(16)よりも広くなっており、かつ含まれる熱交換チューブ(2)の数は、第１チューブ群(13)が第２チューブ群(14)よりも少なく、かつ第５チューブ群(17)が第４チューブ群(16)よりも多くなっていることが好ましい。 The second to fourth tube groups (14), (15), and (16) may have the same width in the left-right direction and the same number of heat exchange tubes (2). Also in this case, the width in the left-right direction is such that the first tube group (13) is narrower than the second tube group (14) and the fifth tube group (17) is smaller than the fourth tube group (16). The number of heat exchange tubes (2) that are wide and included is less in the first tube group (13) than in the second tube group (14), and the fifth tube group (17) in the fourth tube group. It is preferable that the number is larger than (16).
風下側上ヘッダ部(5)と風上側上ヘッダ部(7)、および風下側下ヘッダ部(6)と風上側下ヘッダ部(8)とは、たとえば１つのタンク(22)(23)内を左右方向にのびる仕切部(22a)(23a)により通風方向に２つの空間に分割することにより設けられている。 The leeward upper header (5) and the windward upper header (7), and the leeward lower header (6) and the windward lower header (8) are, for example, in one tank (22) (23). Is divided into two spaces in the ventilation direction by partition portions (22a) and (23a) extending in the left-right direction.
風下側上ヘッダ部(5)に、風下側上ヘッダ部(5)内を分割部(5a)により左右方向に並んだ複数の空間に分割することによって、第１チューブ群(13)の熱交換チューブ(2)が通じる第１区画(24)と、第２および第３チューブ群(14)(15)の熱交換チューブ(2)が通じる第２区画(25)と、第４および第５チューブ群(16)(17)の熱交換チューブ(2)が通じる第３区画(26)とが設けられている。 Heat exchange of the first tube group (13) is performed by dividing the leeward upper header part (5) into a plurality of spaces arranged in the left-right direction by the dividing part (5a) in the leeward upper header part (5). A first compartment (24) through which the tube (2) communicates, a second compartment (25) through which the heat exchange tubes (2) of the second and third tube groups (14) (15) communicate, and fourth and fifth tubes. A third section (26) through which the heat exchange tubes (2) of the groups (16) and (17) communicate is provided.
風下側下ヘッダ部(6)に、風下側下ヘッダ部(6)内を分割部(6a)により左右方向に並んだ複数の空間に分割することによって、第１および第２チューブ群(13)(14)の熱交換チューブ(2)が通じる第４区画(27)と、第３および第４チューブ群(15)(16)の熱交換チューブ(2)が通じる第５区画(28)と、第５チューブ群(17)の熱交換チューブ(2)が通じる第６区画(29)とが設けられている。 By dividing the leeward lower header portion (6) into a plurality of spaces arranged in the left-right direction by the dividing portion (6a), the first and second tube groups (13) are divided into the leeward lower header portion (6). A fourth section (27) through which the heat exchange tube (2) of (14) communicates, and a fifth section (28) through which the heat exchange tubes (2) of the third and fourth tube groups (15) and (16) communicate; A sixth section (29) through which the heat exchange tube (2) of the fifth tube group (17) communicates is provided.
風上側上ヘッダ部(7)に、風上側上ヘッダ部(7)内を分割部(7a)により左右方向に並んだ複数の空間に分割することによって、冷媒入口(31)が設けられるとともに第６チューブ群(18)の熱交換チューブ(2)が通じる第７区画(32)と、第７チューブ群(19)の熱交換チューブ(2)が通じる第８区画(33)と、冷媒出口(34)が設けられるとともに第８チューブ群(21)の熱交換チューブ(2)が通じる第９区画(35)とが設けられている。冷媒入口(31)および冷媒出口(34)は風上側上ヘッダ部(7)の上壁部分に上向きに設けられている。 The upwind header section (7) is provided with a refrigerant inlet (31) by dividing the inside of the upwind header section (7) into a plurality of spaces arranged in the left-right direction by the dividing section (7a). A seventh compartment (32) through which the heat exchange tube (2) of the six tube group (18) communicates, an eighth compartment (33) through which the heat exchange tube (2) of the seventh tube group (19) communicates, and a refrigerant outlet ( 34) and a ninth section (35) through which the heat exchange tube (2) of the eighth tube group (21) communicates. The refrigerant inlet (31) and the refrigerant outlet (34) are provided upward on the upper wall portion of the windward upper header section (7).
風上側下ヘッダ部(8)に、風上側下ヘッダ部(8)内を分割部(8a)により左右方向に並んだ複数の空間に分割することによって、第６チューブ群(18)の熱交換チューブ(2)が通じる第１０区画(36)と、第７および第８チューブ群(19)(21)の熱交換チューブ(2)が通じる第１１区画(37)とが設けられている。 Heat exchange of the sixth tube group (18) is performed by dividing the inside of the upwind lower header portion (8) into a plurality of spaces arranged in the left and right direction by the dividing portion (8a) in the upwind lower header portion (8). A tenth section (36) through which the tube (2) communicates and an eleventh section (37) through which the heat exchange tubes (2) of the seventh and eighth tube groups (19) and (21) communicate are provided.
風下側上ヘッダ部(5)の第１区画(24)と、風上側上ヘッダ部(7)の第７区画(32)とが、仕切部(22a)に設けられた複数の連通穴(38)（連通部）を介して通じさせられ、風下側上ヘッダ部(5)の第３区画(26)における第５チューブ群(17)の熱交換チューブ(2)が連通している部分と、風上側上ヘッダ部(7)の第８区画(33)とが、仕切部(22a)に設けられた複数の連通穴(39)（連通部）を介して通じさせられ、風下側下ヘッダ部(6)の第４区画(27)における第１チューブ群(13)の熱交換チューブ(2)が通じている部分と、風上側下ヘッダ部(8)の第１０区画(36)とが、仕切部(23a)に設けられた複数の連通穴(41)（連通部）を介して通じさせられ、風下側下ヘッダ部(6)の第６区画(29)と、風上側下ヘッダ部(8)の第１１区画(37)における第７チューブ群(19)が通じている部分とが、仕切部(23a)に設けられた複数の連通穴(42)（連通部）を介して通じさせられている。 The first section (24) of the leeward upper header section (5) and the seventh section (32) of the leeward upper header section (7) are a plurality of communication holes (38) provided in the partition section (22a). ) (Communication part), the part where the heat exchange tube (2) of the fifth tube group (17) in the third section (26) of the leeward side upper header part (5) communicates, The 8th section (33) of the upwind header section (7) is communicated with the plurality of communication holes (39) (communication section) provided in the partition section (22a), and the downwind lower header section The portion of the fourth section (27) of (6) where the heat exchange tube (2) of the first tube group (13) communicates with the tenth section (36) of the upwind lower header section (8), The sixth section (29) of the leeward side lower header part (6) and the leeward side lower header part ( The part of the eleventh section (37) in 8) through which the seventh tube group (19) communicates is provided in the partition (23a). The plurality of communication holes (42) (communication portion) are communicated.
風下側チューブ列(3)および風上側チューブ列(4)に上述したようにして第１〜第８チューブ群(13)〜(19)(21)が設けられるとともに、風下側両ヘッダ部(5)(6)および風上側両ヘッダ部(7)(8)に上述したようにして冷媒入口(31)、冷媒出口(34)および第１〜第１１区画(24)〜(29)(32)(33)(35)〜(37)が設けられることによって、第１チューブ群(13)、第３チューブ群(15)、第５チューブ群(17)、第６チューブ群(18)および第７チューブ群(19)の熱交換チューブ(2)内を冷媒が上から下に流れるようになっているとともに、第２チューブ群(14)、第４チューブ群(16)および第８チューブ群(21)の熱交換チューブ(2)内を冷媒が下から上に流れるようになっており、第１および第６の２つのチューブ群(13)(18)により１つの熱交換パスが構成され、第５および第７の２つのチューブ群(17)(19)により１つの熱交換パスが構成され、第２〜第４チューブ群(14)〜(16)および第８チューブ群(21)によりそれぞれ１つの熱交換パスが構成されている。 As described above, the leeward side tube row (3) and the leeward side tube row (4) are provided with the first to eighth tube groups (13) to (19) (21), and both the leeward side header portions (5 ) (6) and the windward header sections (7) and (8) as described above, the refrigerant inlet (31), the refrigerant outlet (34) and the first to eleventh sections (24) to (29) (32) By providing (33) (35)-(37), the first tube group (13), the third tube group (15), the fifth tube group (17), the sixth tube group (18) and the seventh tube group The refrigerant flows from the top to the bottom in the heat exchange tube (2) of the tube group (19), and the second tube group (14), the fourth tube group (16), and the eighth tube group (21 ) In the heat exchange tube (2) from below to above, and the first and sixth two tube groups (13) and (18) constitute one heat exchange path, 5 and 7 groups of two tubes (17) (19) It consists more one heat exchange paths, one heat exchange paths each of which is constituted by the second to fourth tube group (14) - (16) and eighth tube group (21).
したがって、図４に示すように、減圧器により減圧された冷媒は、冷媒入口(31)から第７区画(32)内に流入し、次のように４つの経路を流れて第９区画(35)の冷媒出口(34)から圧縮機に向けて流出するようになされている。第１の経路は、第７区画(32)、連通穴(38)、第１区画(24)、第１チューブ群(13)、第４区画(27)、第２チューブ群(14)、第２区画(25)、第３チューブ群(15)、第５区画(28)、第４チューブ群(16)、第３区画(26)、第５チューブ群(17)、第６区画(29)、連通穴(42)、第１１区画(37)、第８チューブ群(21)および第９区画(35)である。第２の経路は、第７区画(32)、連通穴(38)、第１区画(24)、第１チューブ群(13)、第４区画(27)、第２チューブ群(14)、第２区画(25)、第３チューブ群(15)、第５区画(28)、第４チューブ群(16)、第３区画(26)、連通穴(39)、第８区画(33)、第７チューブ群(19)、第１１区画(37)、第８チューブ群(21)および第９区画(35)である。第３の経路は、第７区画(32)、第６チューブ群(18)、第１０区画(36)、連通穴(41)、第４区画(27)、第２チューブ群(14)、第２区画(25)、第３チューブ群(15)、第５区画(28)、第４チューブ群(16)、第３区画(26)、第５チューブ群(17)、第６区画(29)、連通穴(42)、第１１区画(37)、第８チューブ群(21)および第９区画(35)である。第４の経路は、第７区画(32)、第６チューブ群(18)、第１０区画(36)、連通穴(41)、第４区画(27)、第２チューブ群(14)、第２区画(25)、第３チューブ群(15)、第５区画(28)、第４チューブ群(16)、第３区画(26)、連通穴(39)、第８区画(33)、第７チューブ群(19)、第１１区画(37)、第８チューブ群(21)および第９区画(35)である。 Therefore, as shown in FIG. 4, the refrigerant depressurized by the decompressor flows into the seventh section (32) from the refrigerant inlet (31), flows through the four paths as follows, and passes through the ninth section (35). ) From the refrigerant outlet (34) toward the compressor. The first path consists of the seventh section (32), the communication hole (38), the first section (24), the first tube group (13), the fourth section (27), the second tube group (14), 2 sections (25), 3rd tube group (15), 5th section (28), 4th tube group (16), 3rd section (26), 5th tube group (17), 6th section (29) The communication hole (42), the eleventh section (37), the eighth tube group (21), and the ninth section (35). The second path consists of the seventh section (32), the communication hole (38), the first section (24), the first tube group (13), the fourth section (27), the second tube group (14), 2 sections (25), 3rd tube group (15), 5th section (28), 4th tube group (16), 3rd section (26), communication hole (39), 8th section (33), 7 tube group (19), 11th section (37), 8th tube group (21) and 9th section (35). The third path consists of the seventh section (32), the sixth tube group (18), the tenth section (36), the communication hole (41), the fourth section (27), the second tube group (14), 2 sections (25), 3rd tube group (15), 5th section (28), 4th tube group (16), 3rd section (26), 5th tube group (17), 6th section (29) The communication hole (42), the eleventh section (37), the eighth tube group (21), and the ninth section (35). The fourth path consists of the seventh section (32), the sixth tube group (18), the tenth section (36), the communication hole (41), the fourth section (27), the second tube group (14), 2 sections (25), 3rd tube group (15), 5th section (28), 4th tube group (16), 3rd section (26), communication hole (39), 8th section (33), 7 tube group (19), 11th section (37), 8th tube group (21) and 9th section (35).
そして、第１および第６チューブ群(13)(18)により構成された熱交換パスが、冷媒が最初に流れる第１パスになり、第２〜第４チューブ群(14)(15)(16)の各チューブ群により構成された熱交換パスが、中間パスである第２〜第４パスになり、第５および第７チューブ群(17)(19)により構成された熱交換パスが、中間パスである第５パスになり、第８チューブ群(21)により構成された熱交換パスが、冷媒が最後に流れる第６パス（最終パス）になっている。したがって、冷媒が、前記４つの経路のうちのいずれの経路で流れたとしても、第１〜第６パスを順次流れる。 The heat exchange path constituted by the first and sixth tube groups (13) and (18) becomes the first path through which the refrigerant flows first, and the second to fourth tube groups (14), (15), (16). The heat exchange paths formed by the tube groups are the second to fourth paths that are intermediate paths, and the heat exchange paths formed by the fifth and seventh tube groups (17) and (19) are the intermediate paths. The heat exchange path constituted by the eighth tube group (21) is the sixth path (final path) through which the refrigerant flows last. Therefore, even if the refrigerant flows through any of the four paths, the refrigerant sequentially flows through the first to sixth paths.
上述したエバポレータ(1)は、圧縮機、冷媒冷却器としてのコンデンサおよび減圧器としての膨張弁とともに冷凍サイクルを構成し、車両用空調装置として車両、たとえば自動車に搭載される。そして、たとえばエバポレータ(1)の左半部における車両中央寄り（右側）の通風間隙(9)を通過した空気が、比較的短いダクトを通して車両中央部に設けられた吹き出し口に送られるとともに当該吹き出し口から運転席に向かって吹き出され、同じく左半部における窓側（左側）の通風間隙(9)を通過した空気が、比較的長いダクトを通して窓側に設けられた吹き出し口に送られるとともに当該吹き出し口から運転席に向かって吹き出されるようになっている。また、エバポレータ(1)の右半部における車両中央寄り（左側）の通風間隙(9)を通過した空気が、比較的短いダクトを通して車両中央部に設けられた吹き出し口に送られるとともに当該吹き出し口から助手席に向かって吹き出され、同じく右半部における窓側（右側）の通風間隙(9)を通過した空気が、比較的長いダクトを通して窓側に設けられた吹き出し口に送られるとともに当該吹き出し口から助手席に向かって吹き出されるようになっている。 The evaporator (1) described above constitutes a refrigeration cycle together with a compressor, a condenser as a refrigerant cooler, and an expansion valve as a decompressor, and is mounted on a vehicle, for example, an automobile, as a vehicle air conditioner. Then, for example, air that has passed through the ventilation gap (9) closer to the vehicle center (right side) in the left half of the evaporator (1) is sent to a blowout port provided in the vehicle center through a relatively short duct and Air blown out from the mouth toward the driver's seat and passed through the ventilation gap (9) on the window side (left side) in the left half is sent to the air outlet provided on the window side through a relatively long duct and the air outlet The air is blown out toward the driver's seat. In addition, the air that has passed through the ventilation gap (9) near the center of the vehicle (left side) in the right half of the evaporator (1) is sent to the outlet provided in the center of the vehicle through a relatively short duct and the outlet The air that was blown out from the front passenger seat and passed through the window side (right side) ventilation gap (9) in the right half is sent to the air outlet provided on the window side through a relatively long duct and from the air outlet. It is blown out toward the passenger seat.
圧縮機のオン時には、圧縮機、コンデンサおよび膨張弁を通過した冷媒が、冷媒入口(31)から第７区画(32)に流入し、上述した４つの経路を通って第１〜第６パスを順次流れ、冷媒出口(34)から流出する。冷媒が、風下側チューブ列(3)の熱交換チューブ(2)内、および風上側チューブ列(4)の熱交換チューブ(2)内を流れる間に、通風間隙(9)を通過する空気と熱交換をし、空気は冷却され、冷媒は気相となって流出する。エバポレータ(1)を通過した空気は、上述のようにして、車両中央部に設けられた吹き出し口および窓側に設けられた吹き出し口から運転席および助手席に吹き出され、車室内が冷房される。 When the compressor is on, the refrigerant that has passed through the compressor, the condenser, and the expansion valve flows into the seventh section (32) from the refrigerant inlet (31), and passes through the first to sixth paths through the four paths described above. Sequentially flows and flows out from the refrigerant outlet (34). While the refrigerant flows in the heat exchange tubes (2) of the leeward tube row (3) and in the heat exchange tubes (2) of the windward tube row (4), the air passing through the ventilation gap (9) Heat exchange is performed, the air is cooled, and the refrigerant flows out as a gas phase. As described above, the air that has passed through the evaporator (1) is blown out to the driver seat and the passenger seat from the air outlet provided in the center of the vehicle and the air outlet provided on the window side, thereby cooling the passenger compartment.
すなわち、エバポレータ(1)の左半部においては、第８チューブ群(21)の一部の通風間隙(9)を通過した後、第２チューブ群(14)および第３チューブ群(15)の少なくとも一部の通風間隙(9)を通過した空気が、比較的短いダクトを通して車両中央部に設けられた吹き出し口に送られるとともに当該吹き出し口から運転席に向かって吹き出され、第６チューブ群(18)の通風間隙(9)を通過した後、第１チューブ群(13)の通風間隙(9)を通過した空気が、比較的長いダクトを通して窓側に設けられた吹き出し口に送られるとともに当該吹き出し口から運転席に向かって吹き出されるようになっている。また、エバポレータ(1)の右半部においては、第８チューブ群(21)の一部の通風間隙(9)を通過した後、第４チューブ群(15)の通風間隙(9)を通過した空気が、比較的短いダクトを通して車両中央部に設けられた吹き出し口に送られるとともに当該吹き出し口から助手席に向かって吹き出され、第７チューブ群(19)の通風間隙(9)を通過した後、第５チューブ群(17)の通風間隙(9)を通過した空気が、比較的長いダクトを通して窓側に設けられた吹き出し口に送られるとともに当該吹き出し口から助手席に向かって吹き出されるようになっている。 That is, in the left half of the evaporator (1), after passing through a part of the ventilation gap (9) of the eighth tube group (21), the second tube group (14) and the third tube group (15) The air that has passed through at least a part of the ventilation gap (9) is sent to a blowing port provided in the center of the vehicle through a relatively short duct and blown out from the blowing port toward the driver's seat. After passing through the ventilation gap (9) of 18), the air that has passed through the ventilation gap (9) of the first tube group (13) is sent to the blowout opening provided on the window side through the relatively long duct and the blowout. It is blown out from the mouth toward the driver's seat. In the right half of the evaporator (1), after passing through a part of the ventilation gap (9) of the eighth tube group (21), it passed through the ventilation gap (9) of the fourth tube group (15). After the air is sent to the air outlet provided in the center of the vehicle through a relatively short duct and blown out from the air outlet toward the passenger seat, after passing through the ventilation gap (9) of the seventh tube group (19) The air that has passed through the ventilation gap (9) of the fifth tube group (17) is sent to a blowing port provided on the window side through a relatively long duct and blown out from the blowing port toward the passenger seat. It has become.
ところで、圧縮機のオン時には、一般的に、エバポレータを通過する空気の風速が速い部分では冷媒の蒸発が促進されて気相冷媒が多くなり、熱交換チューブ(2)を流れる際の通路抵抗が増大する傾向にあるが、上記実施形態のエバポレータ(1)においては、冷媒が、第１パスから第５パスに順次流れた後最終パスである第６パスを流れるようになされているので、すべてのパスを構成するチューブ群(13)(14)(15)(16)(17)(18)(19)(21)の熱交換チューブ(2)を流れる冷媒の流量が均一化される。したがって、エバポレータ(1)の全部分を通過した空気の温度が均一化される。 By the way, when the compressor is turned on, generally, vaporization of the refrigerant is promoted in the portion where the wind speed of the air passing through the evaporator is high, the gas phase refrigerant increases, and the passage resistance when flowing through the heat exchange tube (2) is increased. Although it tends to increase, in the evaporator (1) of the above embodiment, the refrigerant flows through the sixth path, which is the final path, after sequentially flowing from the first path to the fifth path. The flow rate of the refrigerant flowing through the heat exchange tubes (2) of the tube groups (13), (14), (15), (16), (17), (18), (19), and (21) constituting the above path is made uniform. Therefore, the temperature of the air that has passed through the entire part of the evaporator (1) is made uniform.
圧縮機のオフ時には、スーパーヒート領域を有する第８チューブ群(21)の通風間隙(9)を通過した直後の空気の温度が、第１〜第７チューブ群(13)〜(19)の通風間隙(9)を通過した直後の空気の温度よりも高くなる。また、第１チューブ群(13)と第６チューブ群(18)、および第５チューブ群(17)と第７チューブ群(19)においては、当該両チューブ群(13)(18)および(17)(19)により１つのパスが構成されているので、圧縮機のオフ時においても、これらのチューブ群(13)(18)および(17)(19)の熱交換チューブ(2)内には冷媒が残りやすく、その結果両チューブ群(13)(18)および(17)(19)の通風間隙(9)を通過した直後の空気の温度は比較的低くなる。したがって、運転席および助手席の窓側の吹き出し口から吹き出される空気のエバポレータ(1)通過直後の温度が、運転席および助手席の車両中央部の吹き出し口から吹き出される空気のエバポレータ(1)通過直後の温度よりも低くなっており、しかも運転席および助手席の窓側の吹き出し口に送られる空気が暖められる度合いが、車両中央部の吹き出し口に送られる空気が暖められる度合いよりも高くなるのであるから、運転席の車両中央部および窓側の吹き出し口、ならびに助手席の車両中央部および窓側の吹き出し口から吹き出される空気の温度が均一化され、４カ所から車室内に吹き出される空気の温度のばらつきが低減されて、乗員の快適性の低下を抑制することができる。 When the compressor is off, the temperature of the air immediately after passing through the ventilation gap (9) of the eighth tube group (21) having the superheat region is the ventilation of the first to seventh tube groups (13) to (19). It becomes higher than the temperature of the air immediately after passing through the gap (9). In the first tube group (13) and the sixth tube group (18), and in the fifth tube group (17) and the seventh tube group (19), both the tube groups (13), (18) and (17 ) (19) constitutes one path, so even when the compressor is off, the heat exchange tubes (2) of these tube groups (13) (18) and (17) (19) The refrigerant tends to remain, and as a result, the temperature of the air immediately after passing through the ventilation gap (9) between the tube groups (13), (18), (17), and (19) becomes relatively low. Therefore, the temperature of the air blown from the air outlet (1) in the driver seat and the passenger seat on the window side immediately after passing through the air outlet (1) in the center of the driver seat and the passenger seat in the air evaporator (1) The temperature is lower than the temperature immediately after passing, and the degree of warming of the air sent to the driver's and front passenger's window side air outlets is higher than the degree of warming of the air sent to the air outlets in the center of the vehicle Therefore, the temperature of the air blown out from the vehicle central part of the driver's seat and the window-side outlet and the vehicle central part of the passenger seat and the window-side outlet is made uniform, and the air blown out from the four places into the vehicle interior The variation in the temperature of the passenger can be reduced, and a decrease in passenger comfort can be suppressed.
この発明のエバポレータにおいて、上述した実施形態のエバポレータ(1)とは逆向き、すなわち第１チューブ群(13)、第３チューブ群(15)、第５チューブ群(17)、第６チューブ群(18)および第７チューブ群(19)の熱交換チューブ(2)内を冷媒が下から上に流れ、第２チューブ群(14)、第４チューブ群(16)および第８チューブ群(21)の熱交換チューブ(2)内を冷媒が上から下に流れるように、冷媒入口(31)、冷媒出口(34)および第１〜第１１区画(24)〜(29)(32)(33)(35)〜(37)が設けられていてもよい。 In the evaporator according to the present invention, the first tube group (13), the third tube group (15), the fifth tube group (17), the sixth tube group ( 18) and the seventh tube group (19) in the heat exchange tube (2), the refrigerant flows from the bottom to the top, the second tube group (14), the fourth tube group (16) and the eighth tube group (21) The refrigerant inlet (31), the refrigerant outlet (34), and the first to eleventh sections (24) to (29) (32) (33) so that the refrigerant flows from the top to the bottom of the heat exchange tube (2). (35) to (37) may be provided.
また、上述した実施形態のエバポレータ(1)においては、風下側チューブ列(3)（第１チューブ列）に５つのチューブ群(13)〜(17)が設けられ、風上側チューブ列(4)（第２チューブ列）に３つのチューブ群(18)(19)(21)が設けられているが、風下側チューブ列(3)に５以上の奇数のチューブ群が設けられ、風上側チューブ列(4)に風下側チューブ列(3)のチューブ群よりも２つ少ない数のチューブ群が設けられていれば、チューブ群の数は上述した実施形態の数に限定されるものではない。 Moreover, in the evaporator (1) of embodiment mentioned above, five tube groups (13)-(17) are provided in the leeward side tube row | line | column (3) (1st tube row | line | column), and an upwind side tube row | line | column (4) Three tube groups (18), (19) and (21) are provided in the (second tube row), but an odd number of five or more tube groups are provided in the leeward tube row (3). If (4) is provided with two less tube groups than the tube group of the leeward side tube row (3), the number of tube groups is not limited to the number of the embodiments described above.
この発明によるエバポレータは、車両用空調装置を構成する冷凍サイクルに好適に用いられる。 The evaporator according to the present invention is suitably used for a refrigeration cycle constituting a vehicle air conditioner.
(1)：エバポレータ
(2)：熱交換チューブ
(3)：風下側チューブ列（第１チューブ列）
(4)：風上側チューブ列（第２チューブ列）
(5)：風下側上ヘッダ部（第１ヘッダ部）
(6)：風下側下ヘッダ部（第２ヘッダ部）
(7)：風上側上ヘッダ部（第３ヘッダ部）
(8)：風上側下ヘッダ部（第４ヘッダ部）
(13)(14)(15)(16)(17)(18)(19)(21)：第１〜第８チューブ群
(24)(25)(26)(27)(28)(29)：第１〜第６区画
(31)：冷媒入口
(32)(33)：第７〜第８区画
(34)：冷媒出口
(35)(36)(37)：第９〜第１１区画
(38)(39)(41)(42)：連通穴
(1): Evaporator
(2): Heat exchange tube
(3): Downward tube row (first tube row)
(4): Windward tube row (second tube row)
(5): Downward upper header (first header)
(6): Downstream lower header (second header)
(7): Windward upper header (third header)
(8): Upwind lower header (fourth header)
(13) (14) (15) (16) (17) (18) (19) (21): First to eighth tube groups
(24) (25) (26) (27) (28) (29): First to sixth sections
(31): Refrigerant inlet
(32) (33):
(34): Refrigerant outlet
(35) (36) (37):
(38) (39) (41) (42): Communication hole
Claims (6)
第１チューブ列および第２チューブ列の左右いずれか同一端のチューブ群により、冷媒が最初に流れる第１パスが構成され、第２チューブ列の第１パスとなるチューブ群に隣接するチューブ群により、冷媒が最後に流れる最終パスが構成され、第１チューブ列および第２チューブ列の第１パスとは反対側の端部のチューブ群、および残りのチューブ群によりそれぞれ１つの中間パスが構成され、冷媒が、第１パスからすべての中間パスを順次流れた後最終パスを流れるようになされているエバポレータ。 A first tube row and a second tube row, each of which is composed of a plurality of heat exchange tubes arranged at intervals in the left-right direction with the longitudinal direction oriented in the vertical direction, and arranged in the ventilation direction; Heat exchange between the first and second header portions, which are arranged on both the upper and lower sides of the heat exchange tubes with the longitudinal direction oriented in the left-right direction and to which the total heat exchange tubes of the first tube row are connected, and the second tube row It is provided with a third header part and a fourth header part, which are arranged on both upper and lower sides of the tube with the longitudinal direction facing the left and right direction, and to which the total heat exchange tube of the second tube row is connected. An odd number of 5 or more tube groups each including a plurality of heat exchange tubes arranged in a row are provided, and the second tube row includes a plurality of heat exchange tubes arranged in a row and includes a tube of the first tube row. There are two tube groups less than the group, the refrigerant flow directions in the tube groups located at the left and right ends of the first tube row and the second tube row are the same, and each of the tube groups has one each. An evaporator whose path is composed,
The first path through which the refrigerant first flows is constituted by the tube group at the same end on either the left or right side of the first tube row and the second tube row, and the tube group adjacent to the tube group serving as the first pass of the second tube row The final path through which the refrigerant flows last is configured, and one intermediate path is configured by the tube group at the end opposite to the first path of the first tube row and the second tube row, and the remaining tube group, respectively. The evaporator is configured such that the refrigerant flows in the final path after sequentially flowing through all the intermediate paths from the first path.
第２ヘッダ部が、第１チューブ列の第１パスのチューブ群および当該チューブ群に隣接するチューブ群の熱交換チューブが通じる区画と、第１チューブ列の第１パスのチューブ群とは反対側端部のチューブ群の熱交換チューブが通じる区画とを有し、
第３ヘッダ部が、冷媒入口が設けられるとともに第２チューブ列の第１パスのチューブ群の熱交換チューブが通じる区画と、第２チューブ列の第１パスのチューブ群とは反対側端部のチューブ群の熱交換チューブが通じる区画と、冷媒出口が設けられるとともに第２チューブ列の最終パスのチューブ群の熱交換チューブが通じる区画とを有し、
第４ヘッダ部が、第２チューブ列の第１パスのチューブ群の熱交換チューブが通じる区画と、第２チューブ列の第１パスのチューブ群とは反対側端部のチューブ群および当該チューブ群に隣接するチューブ群の熱交換チューブが通じる区画と、第２チューブ列の最終パスのチューブ群の熱交換チューブが通じる区画とを有し、
第１ヘッダ部における第１チューブ列の第１パスのチューブ群の熱交換チューブが通じる区画と、第３ヘッダ部における第２チューブ列の第１パスのチューブ群の熱交換チューブが通じる区画とが通じさせられ、第１ヘッダ部における第１チューブ列の第１パスのチューブ群とは反対側端部のチューブ群および当該チューブ群に隣接するチューブ群の熱交換チューブが通じる区画と、第３ヘッダ部における第２チューブ列の第１パスのチューブ群とは反対側端部のチューブ群の熱交換チューブが通じる区画とが通じさせられ、
第２ヘッダ部における第１チューブ列の第１パスのチューブ群および当該チューブ群に隣接するチューブ群の熱交換チューブが通じる区画と、第４ヘッダ部における第２チューブ列の第１パスのチューブ群の熱交換チューブが通じる区画とが通じさせられ、第２ヘッダ部における第１チューブ列の第１パスのチューブ群とは反対側端部のチューブ群の熱交換チューブが通じる区画と、第４ヘッダ部における第２チューブ列の第１パスのチューブ群とは反対側端部のチューブ群および当該チューブ群に隣接するチューブ群の熱交換チューブが通じる区画とが通じさせられている請求項１記載のエバポレータ。 The first header section is a section through which the heat exchange tubes of the first pass tube group of the first tube row communicate, and the tube group on the opposite side of the first pass tube group of the first tube row and the tube group. A section through which the heat exchange tubes of the tube group adjacent to
A section through which the second header portion communicates with the tube group of the first path of the first tube row and the heat exchange tube of the tube group adjacent to the tube group, and the side opposite to the tube group of the first pass of the first tube row A section through which the heat exchange tubes of the end tube group communicate,
The third header portion is provided with a refrigerant inlet and a section through which the heat exchange tube of the first pass tube group of the second tube row communicates with the end portion on the opposite side of the first pass tube group of the second tube row. A section through which the heat exchange tubes of the tube group communicate, and a section through which the refrigerant outlet is provided and through which the heat exchange tubes of the tube group of the final path of the second tube row communicate,
The fourth header portion is a section through which the heat exchange tubes of the tube group of the first pass of the second tube row communicate, the tube group on the opposite side of the tube group of the first pass of the second tube row, and the tube group. A section through which the heat exchange tube of the tube group adjacent to the pipe communicates, and a section through which the heat exchange tube of the tube group of the final path of the second tube row communicates,
A section through which the heat exchange tubes of the first pass tube group of the first tube row in the first header section communicate with a section through which the heat exchange tubes of the first pass tube group of the second tube row in the third header section communicate. A section through which the heat exchange tube of the tube group adjacent to the tube group adjacent to the tube group and the tube group at the opposite end to the tube group of the first path of the first tube row in the first header portion communicates, and the third header A section through which the heat exchange tube of the tube group at the opposite end to the tube group of the first path of the second tube row in the section is communicated,
A section through which the first-pass tube group of the first tube row in the second header section and a heat exchange tube of the tube group adjacent to the tube group communicate, and a first-pass tube group of the second tube row in the fourth header portion A section through which the heat exchange tubes of the first tube row of the first header row of the second header section communicate with the heat exchange tubes of the tube group opposite to the section of the first header row, and a fourth header. The tube group at the opposite end to the tube group of the first path of the second tube row in the section and the section through which the heat exchange tube of the tube group adjacent to the tube group communicates are connected. Evaporator.
第１ヘッダ部に、第１チューブ群の熱交換チューブが通じる第１区画と、第２および第３チューブ群の熱交換チューブが通じる第２区画と、第４および第５チューブ群の熱交換チューブが通じる第３区画とが設けられ、第２ヘッダ部に、第１および第２チューブ群の熱交換チューブが通じる第４区画と、第３および第４チューブ群の熱交換チューブが通じる第５区画と、第５チューブ群の熱交換チューブが通じる第６区画とが設けられ、第３ヘッダ部に、冷媒入口が設けられるとともに第６チューブ群の熱交換チューブが通じる第７区画と、第７チューブ群の熱交換チューブが通じる第８区画と、冷媒出口が設けられるとともに第８チューブ群の熱交換チューブが通じる第９区画とが設けられ、第４ヘッダ部に、第６チューブ群の熱交換チューブが通じる第１０区画と、第７および第８チューブ群の熱交換チューブが通じる第１１区画とが設けられ、第１１区画が、第２チューブ列の第１パスのチューブ群とは反対側端部のチューブ群および当該チューブ群に隣接するチューブ群の熱交換チューブが通じる区画と、第２チューブ列の最終パスのチューブ群の熱交換チューブが通じる区画とを兼ねており、
第１ヘッダ部の第１区画と第３ヘッダ部の第７区画とが通じさせられ、第１ヘッダ部の第３区画における第５チューブ群の熱交換チューブが連通している部分と第３ヘッダ部の第８区画とが通じさせられ、第２ヘッダ部の第４区画における第１チューブ群の熱交換チューブが連通している部分と第４ヘッダ部の第１０区画とが通じさせられ、第２ヘッダ部の第６区画と第４ヘッダ部の第１１区画における第７チューブ群の熱交換チューブが連通している部分とが通じさせられ、
第１チューブ群および第６チューブ群により第１パスが構成され、第８チューブ群により最終パスが構成され、第５チューブ群および第７チューブ群と、第２〜第４チューブ群とによりそれぞれ中間パスが構成されている請求項２記載のエバポレータ。 In the first tube row, the first to fifth tube groups are provided in order from either one of the left and right sides to the other end so that the first tube group becomes the tube group of the first pass. In the second tube row, the sixth to eighth tube groups, the sixth tube group becomes the tube group of the first pass, and the seventh tube group is the tube group of the first pass of the second tube row. And the tube group at the opposite end, and the eighth tube group is located at the center in the left-right direction and is provided to be the final pass tube group,
A first section through which the heat exchange tubes of the first tube group communicate with the first header section, a second section through which the heat exchange tubes of the second and third tube groups communicate, and heat exchange tubes of the fourth and fifth tube groups A third section through which the heat exchange tubes of the first and second tube groups communicate with the second header portion, and a fifth section through which the heat exchange tubes of the third and fourth tube groups communicate. And a sixth section through which the heat exchange tube of the fifth tube group communicates, a seventh section through which the refrigerant inlet is provided at the third header portion and the heat exchange tube of the sixth tube group communicates, and a seventh tube An eighth section through which the heat exchange tubes of the group communicate, and a ninth section through which the refrigerant outlet is provided and through which the heat exchange tubes of the eighth tube group communicate. And the eleventh section through which the heat exchange tubes of the seventh and eighth tube groups communicate, and the eleventh section is the end opposite to the tube group of the first path of the second tube row. And a section through which the heat exchange tubes of the tube group adjacent to the tube group and a section through which the heat exchange tubes of the tube group in the final path of the second tube row communicate,
The first header section and the seventh section of the third header section are communicated with each other, and the third header and the portion where the heat exchange tubes of the fifth tube group in the third section of the first header section communicate with each other The eighth section of the first header group is communicated with the portion of the fourth header section of the second header section where the heat exchange tubes of the first tube group communicate with the tenth section of the fourth header section. The 6th section of the 2 header part and the part where the heat exchange tubes of the 7th tube group in the 11th section of the 4th header part are communicated,
The first pass is composed of the first tube group and the sixth tube group, the final pass is composed of the eighth tube group, and the fifth tube group, the seventh tube group, and the second to fourth tube groups are respectively intermediate. The evaporator according to claim 2, wherein the path is configured.
The evaporator according to any one of claims 1 to 5, wherein the refrigerant flows from top to bottom in the heat exchange tubes of the left and right end tube groups of the first and second tube rows.
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