JP6220692B2 - Heat exchanger - Google Patents
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- JP6220692B2 JP6220692B2 JP2014021915A JP2014021915A JP6220692B2 JP 6220692 B2 JP6220692 B2 JP 6220692B2 JP 2014021915 A JP2014021915 A JP 2014021915A JP 2014021915 A JP2014021915 A JP 2014021915A JP 6220692 B2 JP6220692 B2 JP 6220692B2
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Description
この発明は熱交換器に関する。 The present invention relates to a heat exchanger.
この明細書および特許請求の範囲において、「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 this specification and claims, the term “aluminum” includes aluminum alloys in addition to pure aluminum.
近年、環境保護や自動車の燃費向上などを目的として、信号待ちなどの停車時にエンジンを自動的に停止させる自動車が提案されている。 In recent years, automobiles have been proposed that automatically stop the engine when the vehicle stops, such as when waiting for a signal, for the purpose of environmental protection or improvement in automobile fuel efficiency.
しかしながら、通常のカーエアコンにおいては、エンジンを停止させると、エンジンを駆動源とする圧縮機が停止するので、エバポレータに冷媒が供給されなくなり、冷房能力が急激に低下するという問題がある。 However, in a normal car air conditioner, when the engine is stopped, the compressor using the engine as a driving source stops, so that there is a problem that the refrigerant is not supplied to the evaporator and the cooling capacity is rapidly reduced.
そこで、このような問題を解決するために、エバポレータに蓄冷機能を付与し、エンジンが停止して圧縮機が停止した際に、エバポレータに蓄えられた冷熱を放冷して車室内を冷却することが考えられている。 Therefore, in order to solve such problems, the evaporator is provided with a cold storage function, and when the engine stops and the compressor stops, the cold stored in the evaporator is discharged to cool the vehicle interior. Is considered.
この種の蓄冷機能付きエバポレータとして、上下方向にのびるとともに幅方向が通風方向を向いた複数の扁平状冷媒流通管（熱交換管）が、互いに間隔をおいて並列状に配置されており、隣り合う冷媒流通管どうしの間に間隙が形成され、全間隙のうち一部でかつ複数の間隙に蓄冷材が封入された蓄冷材容器が配置されるとともに、残りの間隙にフィンが配置され、フィンが配置された間隙が通風間隙となり、蓄冷材容器が、２枚の金属板の周縁部どうしを接合することにより形成されている蓄冷機能付きエバポレータが提案されている（特許文献１参照）。 In this type of evaporator with a cold storage function, a plurality of flat refrigerant flow pipes (heat exchange pipes) extending in the vertical direction and having the width direction facing the ventilation direction are arranged in parallel with a space between each other. A gap is formed between the matching refrigerant circulation pipes, and a cool storage material container in which the cool storage material is sealed in a part and a plurality of the gaps is disposed, and fins are disposed in the remaining gaps. An evaporator with a cold storage function has been proposed in which a gap in which is disposed becomes a ventilation gap and a cold storage material container is formed by joining the peripheral portions of two metal plates (see Patent Document 1).
特許文献１記載の蓄冷機能付きエバポレータによれば、圧縮機が作動している通常の冷房時には、冷媒流通管内を流れる冷媒の有する冷熱が、蓄冷材容器の両側壁を形成する金属板を経て蓄冷材容器内の蓄冷材に伝わって蓄冷材に冷熱が蓄えられるようになっている。一方、圧縮機が停止した際には、蓄冷材容器内の蓄冷材に蓄えられた冷熱が、蓄冷材容器の両側壁を形成する金属板を経て冷媒流通管に伝えられ、冷媒流通管を通って蓄冷材容器が配置された間隙の両隣の間隙に配置されたフィンに伝えられ、フィンから当該間隙を流れる空気に放冷されるようになっている。 According to the evaporator with a cold storage function described in Patent Document 1, during normal cooling when the compressor is operating, the cold heat of the refrigerant flowing in the refrigerant flow pipe is stored through the metal plates that form both side walls of the cold storage material container. It is transmitted to the cool storage material in the material container, and cold energy is stored in the cool storage material. On the other hand, when the compressor is stopped, the cold heat stored in the regenerator material in the regenerator container is transmitted to the refrigerant distribution pipe via the metal plates forming both side walls of the regenerator container, and passes through the refrigerant distribution pipe. Then, it is transmitted to the fins arranged in the gaps adjacent to the gap where the cold storage material container is arranged, and is cooled by the air flowing through the gaps from the fins.
しかしながら、特許文献１記載の蓄冷機能付きエバポレータによれば、蓄冷材容器を形成する金属板を必要とし、部品点数が多くなるという問題がある。また、全ての間隙にフィンが配置されていないので、全フィンと間隙を流れる空気との間の伝熱面積が不足するおそれがる。しかも、蓄冷機能付きエバポレータを通過する空気に対する通気抵抗が比較的大きくなる。 However, according to the evaporator with a cool storage function described in Patent Document 1, there is a problem that a metal plate that forms a cool storage material container is required and the number of parts increases. Further, since fins are not arranged in all the gaps, there is a possibility that the heat transfer area between all the fins and the air flowing through the gaps is insufficient. And the ventilation resistance with respect to the air which passes the evaporator with a cool storage function becomes comparatively large.
この発明の目的は、上記問題を解決し、部品点数を低減しうる熱交換器を提供することにある。 An object of the present invention is to provide a heat exchanger that can solve the above problems and reduce the number of parts.
本発明は、上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)長手方向を同方向に向けるとともに幅方向を通風方向に向けた状態で、互いに間隔をおいて配置された複数の扁平状熱交換管と、隣り合う熱交換管どうしの間に形成された通風間隙に配置されたフィンとを備えており、熱交換管に熱輸送媒体が流れる複数の管路が幅方向に並んで形成されている熱交換器において、
熱交換管の少なくとも１つの管路内に、熱交換管を形成する金属よりも単位容積あたりの熱容量の大きい材料からなる固相の顕熱蓄熱材が、管路の内面との間に流通間隙が形成されるように配置されている熱交換器。
1) Formed between a plurality of flat heat exchange tubes arranged adjacent to each other and adjacent heat exchange tubes with the longitudinal direction in the same direction and the width direction in the ventilation direction. A heat exchanger including a plurality of fins arranged in the ventilation gap, wherein a plurality of pipes through which the heat transport medium flows are arranged in the width direction in the heat exchange pipe,
A solid-phase sensible heat storage material made of a material having a larger heat capacity per unit volume than the metal forming the heat exchange pipe is disposed between at least one pipe of the heat exchange pipe and the inner surface of the pipe. A heat exchanger that is arranged to form.
2)熱交換管の全管路のうち少なくとも１つの管路の幅が、他の管路の幅よりも広幅となっており、当該広幅管路内に顕熱蓄熱材が配置されている上記1)記載の熱交換器。 2) The width of at least one of the entire pipes of the heat exchange pipe is wider than the width of the other pipes, and the sensible heat storage material is disposed in the wide pipe. 1) The heat exchanger described.
3)顕熱蓄熱材が配置された管路が、熱交換管の通風方向下流側端部に存在している上記1)または2)記載の熱交換器。 3) The heat exchanger according to 1) or 2) above, wherein the pipe line on which the sensible heat storage material is disposed is present at the downstream end of the heat exchange pipe in the ventilation direction.
4)熱交換管の長手方向の両側部分にヘッダタンクが配置されるとともに、熱交換管の両端部がヘッダタンクに接続されており、顕熱蓄熱材が、熱交換管の両ヘッダタンク間に位置する部分の全長にわたって存在するように配置されている上記1)〜3)のうちのいずれかに記載の熱交換器。 4) The header tanks are arranged on both sides of the heat exchange pipe in the longitudinal direction, and both ends of the heat exchange pipe are connected to the header tank, and the sensible heat storage material is placed between the header tanks of the heat exchange pipe. The heat exchanger according to any one of the above 1) to 3), which is disposed so as to exist over the entire length of the portion located.
5)熱交換管の管壁が内側に変形することによって、顕熱蓄熱材が管路内で固定されている上記1)〜4)のうちのいずれかに記載の熱交換器。 5) The heat exchanger according to any one of the above 1) to 4), wherein the sensible heat storage material is fixed in the pipe line by deforming the tube wall of the heat exchange tube inward.
6)熱交換管がアルミニウムからなり、顕熱蓄熱材がステンレス鋼からなる上記1)〜5)のうちのいずれかに記載の熱交換器。 6) The heat exchanger according to any one of 1) to 5) above, wherein the heat exchange tube is made of aluminum and the sensible heat storage material is made of stainless steel.
7)熱交換管が冷熱を輸送する媒体を流すとともに、顕熱蓄熱材が熱交換管の管路内を流れる媒体の有する冷熱により冷却されるようになされ、熱交換管内を流れる媒体が、隣り合う熱交換管どうしの間の通風間隙を流れる空気から熱を奪って気化し、蓄冷機能付きエバポレータとして用いられる上記1)〜6)のうちのいずれかに記載の熱交換器。 7) The heat exchange pipe flows a medium for transporting cold heat, and the sensible heat storage material is cooled by the cold heat of the medium flowing in the pipe of the heat exchange pipe. The heat exchanger according to any one of the above 1) to 6), which is used as an evaporator with a cold storage function by removing heat from the air flowing through the ventilation gap between the matching heat exchange pipes.
8)熱交換管が温熱を輸送する媒体を流すとともに、顕熱蓄熱材が熱交換管の管路内を流れる媒体の有する温熱により加熱されるようになされている上記1)〜6)のうちのいずれかに記載の熱交換器。 8) Among the above 1) to 6), in which the heat exchange pipe flows the medium for transporting the heat, and the sensible heat storage material is heated by the heat of the medium flowing in the pipe of the heat exchange pipe The heat exchanger in any one of.
上記1)〜8)の熱交換器によれば、熱交換管の少なくとも１つの管路内に、熱交換管を形成する金属よりも単位容積あたりの熱容量の大きい材料からなる固相の顕熱蓄熱材が、管路の内面との間に流通間隙が形成されるように配置されているので、顕熱蓄熱材が配置された管路を有する熱交換管を流れる熱輸送媒体の有する冷熱または温熱が、顕熱蓄熱材に蓄えられる。たとえば、上記7)の熱交換器のように、熱交換管が冷熱を輸送する媒体を流すとともに、顕熱蓄熱材が、顕熱蓄熱材が配置された管路を有する熱交換管内を流れる媒体の有する冷熱により冷却されるようになされ、熱交換管内を流れる媒体が、隣り合う熱交換管どうしの間の通風間隙を流れる空気から熱を奪って気化し、蓄冷機能付きエバポレータとして用いられる場合、圧縮機が作動している通常の冷房時には、顕熱蓄熱材が配置された管路を有する熱交換管内を流れる媒体の有する冷熱が、顕熱蓄熱材に伝わって顕熱蓄熱材に冷熱が蓄えられる。一方、圧縮機が停止した際には、顕熱蓄熱材に蓄えられた冷熱が熱交換管の管壁に伝えられ、管壁およびフィンを通って顕熱蓄熱材が配置された熱交換管の両隣の通風間隙を流れる空気に放冷される。 According to the heat exchangers 1) to 8) above, the sensible heat of the solid phase made of a material having a larger heat capacity per unit volume than the metal forming the heat exchange pipe in at least one pipe line of the heat exchange pipe Since the heat storage material is arranged so that a flow gap is formed between the inner surface of the pipe line, the cold heat of the heat transport medium flowing through the heat exchange pipe having the pipe line where the sensible heat storage material is arranged or Warm heat is stored in the sensible heat storage material. For example, like the heat exchanger of 7) above, a medium in which a heat exchange pipe flows a cold transport medium and a sensible heat storage material flows in a heat exchange pipe having a pipe line in which the sensible heat storage material is arranged When the medium flowing in the heat exchange pipe is vaporized by taking heat from the air flowing through the ventilation gap between adjacent heat exchange pipes and used as an evaporator with a cold storage function, During normal cooling when the compressor is operating, the cold heat of the medium flowing in the heat exchange pipe having the pipe line where the sensible heat storage material is arranged is transmitted to the sensible heat storage material, and the sensible heat storage material stores the cold heat. It is done. On the other hand, when the compressor is stopped, the cold heat stored in the sensible heat storage material is transmitted to the tube wall of the heat exchange tube, and the heat exchange tube in which the sensible heat storage material is disposed through the tube wall and the fins. It is cooled by the air flowing through the ventilation gaps on both sides.
したがって、特許文献１記載の蓄冷機能付きエバポレータのように、２枚の金属板からなる蓄冷材容器を必要としないので、部品点数を低減することができる。しかも、全ての通風間隙にフィンが配置されるので、特許文献１記載の蓄冷機能付きエバポレータに比較して、全フィンと通風間隙を流れる空気との間の伝熱面積が増大する。しかも、全通風間隙が蓄冷材容器により塞がれることはないので、特許文献１記載の蓄冷機能付きエバポレータに比較して、熱交換器を通過する空気に対する通気抵抗が小さくなる。 Therefore, unlike the evaporator with a cool storage function described in Patent Document 1, a cool storage material container made of two metal plates is not required, so the number of parts can be reduced. And since a fin is arrange | positioned at all the ventilation gaps, compared with the evaporator with a cool storage function of patent document 1, the heat-transfer area between all the fins and the air which flows through a ventilation gap increases. In addition, since the entire ventilation gap is not blocked by the cool storage material container, the ventilation resistance to the air passing through the heat exchanger is smaller than that of the evaporator with the cool storage function described in Patent Document 1.
上記2)の熱交換器によれば、顕熱蓄熱材の容積を大きくすることができるので、蓄熱量を増やすことができ、放熱時間を延ばすことが可能になる。 According to the heat exchanger of 2), since the volume of the sensible heat storage material can be increased, the amount of stored heat can be increased, and the heat radiation time can be extended.
上記3)の熱交換器において、熱交換管が冷熱を輸送する媒体を流すとともに、顕熱蓄熱材が、顕熱蓄熱材が配置された管路を有する熱交換管内を流れる媒体の有する冷熱により冷却されるようになされている場合、通常、熱交換管の通風方向下流側の管路を流れる媒体の温度が他の管路を流れる媒体の温度よりも低くなるので、顕熱蓄熱材をより低い温度に冷却することが可能になる。 In the heat exchanger of the above 3), the heat exchange pipe flows a medium for transporting cold heat , and the sensible heat storage material is cooled by the cold heat of the medium flowing in the heat exchange pipe having a pipe line in which the sensible heat storage material is disposed. When cooled, the temperature of the medium flowing through the pipe downstream of the heat exchange pipe in the ventilation direction is usually lower than the temperature of the medium flowing through the other pipe. It becomes possible to cool to a low temperature.
上記4)の熱交換器によれば、放熱時に、顕熱蓄熱材が配置された熱交換管の両隣の通風間隙を流れる空気に、顕熱蓄熱材の全体から放熱することができ、当該通風間隙を流れる空気全体の温度を均一化することが可能になる。 According to the heat exchanger of the above 4), at the time of heat radiation, heat can be radiated from the entire sensible heat storage material to the air flowing through the ventilation gaps on both sides of the heat exchange pipe on which the sensible heat storage material is arranged. It becomes possible to make the temperature of the whole air flowing through the gap uniform.
上記5)の熱交換器によれば、熱交換管の管路内での顕熱蓄熱材の移動が阻止され、顕熱蓄熱材の移動に起因する異音の発生が抑制される。 According to the heat exchanger of 5) above, the movement of the sensible heat storage material in the pipe line of the heat exchange pipe is prevented, and the generation of noise due to the movement of the sensible heat storage material is suppressed.
上記7)の熱交換器によれば、熱交換管が冷熱を輸送する媒体を流すとともに、顕熱蓄熱材が熱交換管の管路内を流れる媒体の有する冷熱により冷却されるようになされ、熱交換管内を流れる媒体が、隣り合う熱交換管どうしの間の通風間隙を流れる空気から熱を奪って気化し、蓄冷機能付きエバポレータとして用いられる場合、圧縮機が作動している通常の冷房時には、顕熱蓄熱材が配置された管路を有する熱交換管内を流れる媒体の有する冷熱が、顕熱蓄熱材に伝わって顕熱蓄熱材に冷熱が蓄えられる。一方、圧縮機が停止した際には、顕熱蓄熱材に蓄えられた冷熱が熱交換管の管壁に伝えられ、管壁およびフィンを通って顕熱蓄熱材が配置された熱交換管の両隣の通風間隙を流れる空気に放冷される。 According to the heat exchanger of the above 7), the heat exchange pipe flows the medium for transporting cold heat, and the sensible heat storage material is cooled by the cold heat of the medium flowing in the pipe line of the heat exchange pipe, When the medium flowing in the heat exchange pipe takes the heat from the air flowing through the ventilation gap between adjacent heat exchange pipes and vaporizes and is used as an evaporator with a cold storage function , during normal cooling when the compressor is operating The cold heat of the medium flowing through the heat exchange pipe having the pipe line in which the sensible heat storage material is disposed is transmitted to the sensible heat storage material, and the cold heat is stored in the sensible heat storage material. On the other hand, when the compressor is stopped, the cold heat stored in the sensible heat storage material is transmitted to the tube wall of the heat exchange tube, and the heat exchange tube in which the sensible heat storage material is disposed through the tube wall and the fins. It is cooled by the air flowing through the adjacent ventilation gap.
したがって、特許文献１記載の蓄冷機能付きエバポレータのように、２枚の金属板からなる蓄冷材容器を必要としないので、部品点数を低減することができる。しかも、全ての通風間隙にフィンが配置されるので、特許文献１記載の蓄冷機能付きエバポレータに比較して、全フィンと通風間隙を流れる空気との間の伝熱面積が増大する。しかも、全通風間隙が蓄冷材容器により塞がれることはないので、特許文献１記載の蓄冷機能付きエバポレータに比較して、熱交換器を通過する空気に対する通気抵抗が小さくなる。 Therefore, unlike the evaporator with a cool storage function described in Patent Document 1, a cool storage material container made of two metal plates is not required, so the number of parts can be reduced. And since a fin is arrange | positioned at all the ventilation gaps, compared with the evaporator with a cool storage function of patent document 1, the heat-transfer area between all the fins and the air which flows through a ventilation gap increases. In addition, since the entire ventilation gap is not blocked by the cool storage material container, the ventilation resistance to the air passing through the heat exchanger is smaller than that of the evaporator with the cool storage function described in Patent Document 1.
以下、この発明の実施形態を、図面を参照して説明する。この実施形態は、この発明による熱交換器を蓄冷機能付きエバポレータに適用したものであり、熱輸送媒体は冷媒である。 Embodiments of the present invention will be described below with reference to the drawings. This embodiment state, and are obtained by applying the heat exchanger according to the invention in the evaporator with a cool storage function, the heat transport medium is Ru refrigerant der.
以下の説明において、通風方向下流側（図１に矢印Ｘで示す方向、図２の右側）を前、これと反対側を後というものとし、通風方向上流側から見た際の上下、左右（図１の上下、左右）を上下、左右というものとする。 In the following description, the downstream side in the ventilation direction (the direction indicated by the arrow X in FIG. 1, the right side in FIG. 2) is the front, and the opposite side is the rear, and when viewed from the upstream side in the ventilation direction, 1 is referred to as up and down and left and right.
また、全図面を通じて同一物および同一部分には同一符号を付す。 Moreover, the same code | symbol is attached | subjected to the same thing and the same part through all drawings.
図１はこの発明による熱交換器を適用した蓄冷機能付きエバポレータの全体構成を概略的に示し、図２〜図４はその要部の構成を示す。 FIG. 1 schematically shows the overall configuration of an evaporator with a cold storage function to which a heat exchanger according to the present invention is applied, and FIGS. 2 to 4 show the configuration of the main part thereof.
図１において、蓄冷機能付きエバポレータ(1)（熱交換器）は、上下方向に間隔をおいて配置された左右方向にのびるアルミニウム製上ヘッダタンク(2)およびアルミニウム製下ヘッダタンク(3)と、両ヘッダタンク(2)(3)間に設けられた熱交換コア部(4)とを備えている。 In FIG. 1, an evaporator (1) (heat exchanger) with a cold storage function includes an aluminum upper header tank (2) and an aluminum lower header tank (3), which are arranged in the vertical direction and are spaced apart from each other. And a heat exchange core portion (4) provided between the header tanks (2) and (3).
上ヘッダタンク(2)は、前側（通風方向下流側）に位置する風下側上ヘッダ部(5)と、後側（通風方向上流側）に位置しかつ風下側上ヘッダ部(5)に一体化された風上側上ヘッダ部(6)とを備えている。風下側上ヘッダ部(5)の右端部に冷媒入口(7)が設けられ、風上側上ヘッダ部(6)の右端部に冷媒出口(8)が設けられている。下ヘッダタンク(3)は、前側に位置する風下側下ヘッダ部(9)と、後側に位置しかつ風下側下ヘッダ部(9)に一体化された風上側下ヘッダ部(11)とを備えている。 The upper header tank (2) is integrated with the leeward upper header part (5) located on the front side (downstream side of the ventilation direction) and the rear side (upstream side of the ventilation direction) and integrated with the leeward side upper header part (5) And a windward upper header section (6). A refrigerant inlet (7) is provided at the right end of the leeward upper header (5), and a refrigerant outlet (8) is provided at the right end of the leeward upper header (6). The lower header tank (3) includes a leeward lower header portion (9) located on the front side, and an upwind lower header portion (11) located on the rear side and integrated with the leeward lower header portion (9). It has.
図１および図２に示すように、熱交換コア部(4)には、長手方向が上下方向を向くとともに幅方向が通風方向（前後方向）を向いた複数のアルミニウム押出形材製扁平状熱交換管(12)が、左右方向（熱交換管(12)の厚み方向）に間隔をおいて並列状に配置されている。ここでは、前後方向に間隔をおいて配置された２つの熱交換管(12)からなる複数の組(13)が左右方向に間隔をおいて配置されており、前後の熱交換管(12)よりなる組(13)の隣り合うものどうしの間に通風間隙(14)が形成されている。前側の熱交換管(12)の上端部は風下側上ヘッダ部(5)に接続されるとともに、同下端部は風下側下ヘッダ部(9)に接続されている。また、後側の熱交換管(12)の上端部は風上側上ヘッダ部(6)に接続されるとともに、同下端部は風上側下ヘッダ部(11)に接続されている。そして、冷媒は、冷媒入口(7)を通ってエバポレータ(1)の風下側上ヘッダ部(5)内に入り、全熱交換管(12)を通って風上側上ヘッダ部(6)の冷媒出口(8)から流出するようになっている。 As shown in FIGS. 1 and 2, the heat exchanging core portion (4) has a flat heat made of a plurality of extruded aluminum shapes whose longitudinal direction faces the vertical direction and whose width direction faces the ventilation direction (front-rear direction). The exchange pipes (12) are arranged in parallel in the left-right direction (thickness direction of the heat exchange pipe (12)). Here, a plurality of sets (13) consisting of two heat exchange tubes (12) arranged at intervals in the front-rear direction are arranged at intervals in the left-right direction, and the front and rear heat exchange tubes (12) A ventilation gap (14) is formed between adjacent members of the set (13). The upper end of the front heat exchange pipe (12) is connected to the leeward upper header (5), and the lower end is connected to the leeward lower header (9). The upper end of the rear heat exchange pipe (12) is connected to the windward upper header (6), and the lower end is connected to the windward lower header (11). Then, the refrigerant passes through the refrigerant inlet (7) and enters the leeward upper header portion (5) of the evaporator (1), passes through the total heat exchange pipe (12), and flows into the leeward upper header portion (6). It flows out from the outlet (8).
熱交換コア部(4)における全通風間隙(14)に、両面にろう材層を有するアルミニウムブレージングシートからなり、かつ前後方向にのびる波頂部、前後方向にのびる波底部、および波頂部と波底部とを連結する連結部よりなるアルミニウム製コルゲートフィン(15)が、前後両熱交換管(12)に跨るように配置されて通風間隙(14)を形成する左右両側の組(13)を構成する前後両熱交換管(12)にろう付されている。また、左右両端の冷媒流通管(12)の組(13)の外側にも両面にろう材層を有するアルミニウムブレージングシートからなるコルゲートフィン(15)が配置されて前後両冷媒流通管(12)にろう付され、さらに左右両端のコルゲートフィン(15)の外側にアルミニウム製サイドプレート(16)が配置されてコルゲートフィン(15)にろう付されている。 The entire ventilation gap (14) in the heat exchange core part (4) is made of an aluminum brazing sheet having a brazing filler metal layer on both sides, and has a wave crest extending in the front-rear direction, a wave bottom extending in the front-rear direction, and a wave crest and a wave bottom. Corrugated fins (15) made of aluminum, which are connected to each other, are arranged so as to straddle both the front and rear heat exchange pipes (12) to form a pair (13) on both the left and right sides forming a ventilation gap (14) It is brazed to both the front and rear heat exchange tubes (12). In addition, corrugated fins (15) made of aluminum brazing sheets having brazing filler metal layers on both sides are also arranged outside the set (13) of the refrigerant flow pipes (12) at the left and right ends, and the front and rear refrigerant flow pipes (12). The aluminum side plate (16) is disposed outside the corrugated fins (15) at both the left and right ends and brazed to the corrugated fins (15).
図３および図４に示すように、熱交換管(12)には、冷媒が流れる複数の管路(17)(18)が幅方向に並んで形成されている。全ての管路(17)(18)のうち少なくとも１つ、ここでは前後方向中央部の１つの管路(17)の前後方向の幅は、他の管路(18)の前後方向の幅よりも広くなっており、当該広幅管路(17)内に、熱交換管(12)よりも単位容積あたりの熱容量の大きいステンレス鋼からなる顕熱蓄熱材(19)が、管路(17)の内面との間に流通間隙(20)が形成されるように配置されている。顕熱蓄熱材(19)は、熱交換管(12)の全長にわたって配置されており、顕熱蓄熱材(19)は、熱交換管(12)における両ヘッダタンク(2)(3)間に位置する部分の全長にわたって存在している。また、熱交換管(12)の管壁(21)の前後方向中央部分の上下両端部における管路(17)の左右両側の部分は内側に変形させられており、当該変形部(22)に左右両側から挟まれることによって、顕熱蓄熱材(19)が熱交換管(12)の管路(17)内で固定されている。 As shown in FIGS. 3 and 4, the heat exchange pipe (12) is formed with a plurality of pipes (17) and (18) through which the refrigerant flows side by side in the width direction. The width in the front-rear direction of at least one of all the pipes (17), 18 (here, one pipe (17) in the central portion in the front-rear direction is larger than the width in the front-rear direction of the other pipes (18)). In the wide pipe line (17), a sensible heat storage material (19) made of stainless steel having a larger heat capacity per unit volume than the heat exchange pipe (12) is connected to the pipe line (17). It arrange | positions so that a circulation gap (20) may be formed between inner surfaces. The sensible heat storage material (19) is arranged over the entire length of the heat exchange pipe (12), and the sensible heat storage material (19) is located between the header tanks (2) (3) in the heat exchange pipe (12). It exists over the entire length of the located part. In addition, the left and right side portions of the pipe line (17) at both the upper and lower ends of the center portion in the front-rear direction of the pipe wall (21) of the heat exchange pipe (12) are deformed inward, and the deformed portion (22) The sensible heat storage material (19) is fixed in the pipe line (17) of the heat exchange pipe (12) by being sandwiched from both the left and right sides.
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）、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。そして、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、全熱交換管(12)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。冷媒が熱交換管(12)内を流れる間に、通風間隙(14)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 depressurizes the refrigerant that has passed through the condenser ( A refrigeration cycle is configured together with a decompressor, and is mounted as a car air conditioner on a vehicle, such as an automobile, that temporarily stops an engine that is a drive source of a 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 has an evaporator with a cold storage function ( It enters into the leeward upper header part (5) of 1) and flows out from the refrigerant outlet (8) of the leeward upper header part (6) through the total heat exchange pipe (12). While the refrigerant flows through the heat exchange pipe (12), the refrigerant exchanges heat with the air passing through the ventilation gap (14), and the refrigerant flows out as a gas phase.
圧縮機の作動時には、熱交換管(12)内を流れる冷媒の有する冷熱が、顕熱蓄熱材(19)の全体に伝わって顕熱蓄熱材(19)に冷熱が蓄えられる。 During the operation of the compressor, the cold heat of the refrigerant flowing in the heat exchange pipe (12) is transmitted to the entire sensible heat storage material (19), and the cold heat is stored in the sensible heat storage material (19).
圧縮機が停止した場合には、顕熱蓄熱材(19)に蓄えられた冷熱が、熱交換管(12)の管壁(21)およびコルゲートフィン(15)を経て通風間隙(14)を通過する空気に伝えられる。したがって、エバポレータ(1)を通過した風の温度が上昇したとしても、当該風は冷却されるので、冷房能力の急激な低下が防止される。 When the compressor stops, the cold energy stored in the sensible heat storage material (19) passes through the ventilation gap (14) through the pipe wall (21) and the corrugated fin (15) of the heat exchange pipe (12). To the air to do. Therefore, even if the temperature of the wind that has passed through the evaporator (1) rises, the wind is cooled, so that a rapid decrease in the cooling capacity is prevented.
図５および図６は、この発明の熱交換器を適用した蓄冷機能付きエバポレータの他の実施形態を示す。 5 and 6 show another embodiment of an evaporator with a cold storage function to which the heat exchanger of the present invention is applied.
図５および図６に示す蓄冷機能付きエバポレータ(1)の場合、熱交換管(12)の全ての管路(17)(18)のうち少なくとも１つ、ここでは風下側端部の１つの管路(17)の前後方向の幅は、他の管路(18)の前後方向の幅よりも広くなっており、当該広幅管路(17)内に、熱交換管(12)よりも単位容積あたりの熱容量の大きいステンレス鋼からなる顕熱蓄熱材(19)が、管路(17)の内面との間に流通間隙(20)が形成されるように配置されている。顕熱蓄熱材(19)は、熱交換管(12)の全長にわたって配置されており、顕熱蓄熱材(19)は、熱交換管(12)における両ヘッダタンク(2)(3)間に位置する部分の全長にわたって存在している。また、熱交換管(12)の管壁(21)の通風方向風下側部分の上下両端部における管路(17)の左右両側の部分は内側に変形させられており、当該変形部(22)に左右両側から挟まれることによって、顕熱蓄熱材(19)が熱交換管(12)の管路(17)内で固定されている。 In the case of the evaporator (1) with a cold storage function shown in FIGS. 5 and 6, at least one of all the pipes (17) and (18) of the heat exchange pipe (12), here, one pipe at the leeward end. The width in the front-rear direction of the path (17) is wider than the width in the front-rear direction of the other pipe (18), and the unit volume of the wide pipe (17) is larger than that of the heat exchange pipe (12). A sensible heat storage material (19) made of stainless steel having a large heat capacity is disposed so that a flow gap (20) is formed between the inner surface of the pipe (17). The sensible heat storage material (19) is arranged over the entire length of the heat exchange pipe (12), and the sensible heat storage material (19) is located between the header tanks (2) (3) in the heat exchange pipe (12). It exists over the entire length of the located part. In addition, the left and right side portions of the pipe line (17) at the upper and lower ends of the ventilation direction leeward side portion of the pipe wall (21) of the heat exchange pipe (12) are deformed inward, and the deformed portion (22) The sensible heat storage material (19) is fixed in the pipe line (17) of the heat exchange pipe (12).
上記２つの実施形態においては、この発明による熱交換器が、蓄冷機能付きエバポレータに適用されているが、これに限定されるものではなく、熱交換管が温熱を輸送する媒体を流すものであり、顕熱蓄熱材が、熱交換管内を流れる媒体の有する温熱により加熱されるようになされている熱交換器に適用されることもある。 In the above two embodiments, the heat exchanger according to the present invention is applied to an evaporator with a cold storage function. However, the heat exchanger is not limited to this, and the heat exchange pipe flows a medium for transporting warm heat. The sensible heat storage material may be applied to a heat exchanger that is heated by the warm heat of the medium flowing in the heat exchange tube.
この発明による熱交換器は、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のカーエアコンを構成する冷凍サイクルの蓄冷機能付きエバポレータに好適に用いられる。 The heat exchanger according to the present invention is suitably used for an evaporator with a cold storage function of a refrigeration cycle that constitutes a car air conditioner of a vehicle that temporarily stops an engine that is a drive source of a compressor when the vehicle is stopped.
(1)：蓄冷機能付きエバポレータ（熱交換器）
(2)(3)：ヘッダタンク
(12)：熱交換管
(14)：通風間隙
(15)：コルゲートフィン
(17)：広幅管路
(18)：管路
(19)：顕熱蓄熱材
(21)：管壁
(22)：変形部
(1): Evaporator with heat storage function (heat exchanger)
(2) (3): Header tank
(12): Heat exchange pipe
(14): Ventilation gap
(15): Corrugated fin
(17): Wide pipeline
(18): Pipe line
(19): Sensible heat storage material
(21): Pipe wall
(22): Deformation part
Claims (8)
熱交換管の少なくとも１つの管路内に、熱交換管を形成する金属よりも単位容積あたりの熱容量の大きい材料からなる固相の顕熱蓄熱材が、管路の内面との間に流通間隙が形成されるように配置されている熱交換器。 Ventilation gaps formed between a plurality of flat heat exchange tubes that are spaced apart from each other and adjacent heat exchange tubes with the longitudinal direction oriented in the same direction and the width direction directed in the ventilation direction And a heat exchanger in which a plurality of pipes through which a heat transport medium flows are arranged side by side in the width direction.
A solid-phase sensible heat storage material made of a material having a larger heat capacity per unit volume than the metal forming the heat exchange pipe is disposed between at least one pipe of the heat exchange pipe and the inner surface of the pipe. A heat exchanger that is arranged to form.
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| EP3508363B1 (en) * | 2016-08-31 | 2022-11-30 | CRRC Qingdao Sifang Co., Ltd. | Phase-change energy storage air duct and automobile air conditioning system |
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