JP2001147095A - Heat exchanger - Google Patents
Heat exchangerInfo
- Publication number
- JP2001147095A JP2001147095A JP32995199A JP32995199A JP2001147095A JP 2001147095 A JP2001147095 A JP 2001147095A JP 32995199 A JP32995199 A JP 32995199A JP 32995199 A JP32995199 A JP 32995199A JP 2001147095 A JP2001147095 A JP 2001147095A
- Authority
- JP
- Japan
- Prior art keywords
- refrigerant
- heat exchanger
- cores
- core
- header tank
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Details Of Heat-Exchange And Heat-Transfer (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、チューブ、フィン
及びタンクからなるコアの冷媒流路を流通する冷媒と外
気の熱交換を行う熱交換器に関し、特に、複数のコアが
並列に配置されて一体となっている熱交換器に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat exchanger for exchanging heat between a refrigerant flowing through a refrigerant flow path of a core composed of a tube, fins and a tank and outside air, and more particularly to a heat exchanger in which a plurality of cores are arranged in parallel. It relates to an integrated heat exchanger.
【０００２】[0002]
【従来の技術】従来において、車両等の冷凍サイクルに
用いられる熱交換器は、冷媒の熱交換を行う扁平状のチ
ューブと、断面波形状のフィンを備え、前記熱交換チュ
ーブ間にフィンを装着して交互に複数段積層し、前記熱
交換チューブの端部を一対のヘッダタンクに連通接続し
てなる積層型のコアを用いたものが知られている。2. Description of the Related Art Conventionally, a heat exchanger used in a refrigeration cycle of a vehicle or the like has a flat tube for exchanging heat of refrigerant and fins having a corrugated cross section, and fins are mounted between the heat exchange tubes. And a plurality of layers are alternately laminated, and a laminated core formed by connecting the ends of the heat exchange tubes to a pair of header tanks is known.
【０００３】すなわち、熱交換サイクルを流通する冷媒
は、一方のヘッダタンクの流入口からコアに流入し、熱
交換チューブ内部の冷媒流路を流通する。冷媒は、熱交
換チューブを通流する間に、冷媒の熱が前記チューブ及
びフィンに伝達されて外気と熱交換され、他方のヘッダ
タンクの流出口から流出して、再び熱交換サイクルを循
環する。That is, the refrigerant flowing through the heat exchange cycle flows into the core from the inlet of one of the header tanks, and flows through the refrigerant flow path inside the heat exchange tube. While the refrigerant flows through the heat exchange tubes, the heat of the refrigerant is transmitted to the tubes and the fins and exchanges heat with the outside air, flows out of the outlet of the other header tank, and circulates again in the heat exchange cycle. .
【０００４】この種の熱交換器に用いられる熱交換チュ
ーブは、アルミニウム合金を押し出し成形する等して作
製されている。熱交換チューブは、フィンと接触面積を
大きくするために、熱交換チューブ断面が扁平形状とな
るように形成される。A heat exchange tube used in this type of heat exchanger is manufactured by extruding an aluminum alloy or the like. The heat exchange tube is formed such that the heat exchange tube has a flat cross section in order to increase the contact area with the fin.
【０００５】コアの伝熱面積を大きくするために、特開
平４−５２４９８号公報は、複数個の熱交換器を空気通
流方向において前後隣接状態に配置するとともに、各熱
交換器の冷媒回路を直列又は並列に接続した複式熱交換
器を開示している。この複式の熱交換器は、積層された
チューブ、フィン及びタンクからなる積層型のコアを並
列に配置し、スペーサ‐やボルト等の連結部材を用いて
連結した構成となっている。In order to increase the heat transfer area of the core, Japanese Patent Application Laid-Open No. Hei 4-52498 discloses a method in which a plurality of heat exchangers are arranged in front and rear adjacent to each other in the air flow direction, and a refrigerant circuit of each heat exchanger is arranged. Are disclosed in series or in parallel. This double-type heat exchanger has a configuration in which laminated cores composed of laminated tubes, fins, and tanks are arranged in parallel, and connected by using connecting members such as spacers and bolts.
【０００６】[0006]
【発明が解決しようとする課題】近年において、オゾン
層破壊等の問題に鑑み、フロン使用の廃止が求められて
いる。現状の社会情勢を考慮すると、オゾン層破壊につ
ながる冷媒の使用を停止し、それに代わるより良い冷媒
を冷凍サイクルに用いる必要が生じている。例えば、冷
媒として、オゾン層を破壊しない二酸化炭素（ＣＯ２）
等の超臨界流体を用いることが考えられる。In recent years, in view of the problems such as destruction of the ozone layer, the elimination of the use of CFCs has been demanded. In view of the current social situation, it has become necessary to stop using refrigerants that lead to ozone layer depletion and use better alternatives for refrigeration cycles. For example, as a refrigerant, carbon dioxide (CO 2 ) that does not destroy the ozone layer
It is conceivable to use a supercritical fluid such as
【０００７】しかし、超臨界流体を用いる場合、熱交換
過程に伴って体積（密度）変化を生じる気液混合状態の
媒体と比較して、三倍以上の耐圧性が要求される。[0007] However, when a supercritical fluid is used, it is required to have a pressure resistance three times or more as compared with a medium in a gas-liquid mixed state in which a volume (density) changes in accordance with a heat exchange process.
【０００８】地球環境を考慮して、前記ＣＯ２等の超臨
界流体冷媒を用いる場合は、要求される耐圧性を確保す
るために、冷媒が通流するヘッダタンク及びチューブ等
の部材の肉厚を内圧に耐え得る程度に厚くすることが考
えられる。When a supercritical fluid refrigerant such as the above-mentioned CO 2 is used in consideration of the global environment, the thickness of members such as a header tank and tubes through which the refrigerant flows must be ensured in order to ensure the required pressure resistance. May be made thick enough to withstand the internal pressure.
【０００９】ヘッダタンク及びチューブ等の部材を肉厚
としすると、従来と同一体積を有する熱交換器と比較し
て、ヘッダタンク及びチューブ等の冷媒流路が狭小化
し、通流する冷媒流量が減少して熱交換性能が低下する
という問題を生じる。When the thickness of the members such as the header tank and the tube is made thicker, the refrigerant flow path of the header tank and the tube is narrowed and the flow rate of the flowing refrigerant is reduced as compared with the heat exchanger having the same volume as the conventional one. As a result, there arises a problem that heat exchange performance is reduced.
【００１０】一方、自動車用の熱交換サイクルを構成す
る熱交換器の場合は、搭載スペースが車体等によって一
定範囲の制限されるため、特に、外気の通風方向を考慮
して車体に搭載されるコンデンサにおいては、チューブ
及びフィンの長手方向の長さ等を変化させて、熱交換性
能を確保することは困難である。On the other hand, in the case of a heat exchanger constituting a heat exchange cycle for an automobile, the mounting space is limited to a certain range by the vehicle body or the like. Therefore, the heat exchanger is mounted on the vehicle body particularly in consideration of the ventilation direction of the outside air. In a condenser, it is difficult to secure the heat exchange performance by changing the length of the tube and the fin in the longitudinal direction.
【００１１】このため、前述したように複数のコアを並
列に配置して、熱交換性能を確保した熱交換器の構成が
考えられる。冷凍サイクルを構成する圧縮機内には、圧
縮機メカ部の潤滑や、圧縮機内のモーターの冷却のため
の潤滑用オイルが封入されているが、冷媒が圧縮機を通
過する際に冷媒にオイルが溶け込み、冷媒と共に圧縮機
から出て行ってしまう。Therefore, as described above, a configuration of a heat exchanger in which a plurality of cores are arranged in parallel to ensure heat exchange performance can be considered. Lubricating oil for lubricating the mechanical parts of the compressor and cooling the motor in the compressor is sealed in the compressor that composes the refrigeration cycle.However, when the refrigerant passes through the compressor, oil is added to the refrigerant. It melts and goes out of the compressor together with the refrigerant.
【００１２】この対策としてオイルセパレータをサイク
ル内に置いて、冷媒に溶けこんだオイルを分離して圧縮
機に戻したりするが、オイルセパレータもやはり１００
％のオイル分離はできない。As a countermeasure, an oil separator is placed in the cycle to separate the oil dissolved in the refrigerant and return it to the compressor.
% Oil separation is not possible.
【００１３】冷媒として用いるＣＯ２の比重とオイルの
比重を比較すると、オイルの方が重いため、コアのレイ
アウトによっては少しずつオイルセパレータから漏れて
きたオイルがヘッダタンクの下部に溜まっていき、つい
には潤滑油不測による圧縮機の焼き付けが発生するとい
う問題を生じる。When the specific gravity of CO 2 used as a refrigerant and the specific gravity of oil are compared, the oil leaking from the oil separator gradually accumulates in the lower portion of the header tank depending on the layout of the core because the oil is heavier. The problem arises that the compressor is burned due to unexpected lubricating oil.
【００１４】そこで、本発明は、複数のコアを並列に配
置してなる熱交換器において、オイルがヘッダタンクの
下部に溜まらないようにコアをレイアウトし、熱交換性
能、安全性及び耐久性の向上が可能となる熱交換器を提
供することを目的とする。Accordingly, the present invention provides a heat exchanger in which a plurality of cores are arranged in parallel so that the cores are laid out so that oil does not accumulate in the lower portion of the header tank, and heat exchange performance, safety and durability are improved. An object is to provide a heat exchanger that can be improved.
【００１５】[0015]
【課題を解決するための手段】本願第１請求項に記載し
た発明は、熱交換チューブとフィンを交互に複数段積層
し、前記熱交換チューブを冷媒の送受給が行われるヘッ
ダタンクに連通接続してなるコアを備え、前記コアはチ
ューブの長手方向を空気の通気方向に対して直交するよ
うに、複数のコアを並列に配置し、各コア間に媒体を流
通する連通部材を備えた熱交換器において、前記各コア
は、冷媒の流入口をヘッダタンクの上部に備え、冷媒の
流出口をヘッダタンクの下部に備えた熱交換器である。According to the first aspect of the present invention, the heat exchange tubes and the fins are alternately stacked in a plurality of stages, and the heat exchange tubes are connected to a header tank for sending and receiving the refrigerant. A plurality of cores are arranged in parallel so that the longitudinal direction of the tube is perpendicular to the direction of air flow, and a communication member that circulates a medium between the cores is provided. In the exchanger, each of the cores is a heat exchanger including a refrigerant inlet at an upper portion of a header tank and a refrigerant outlet at a lower portion of the header tank.
【００１６】各コアの冷媒の流出口は、ヘッダタンクの
下部に備えられているため、オイルがヘッダタンクの下
部に沈殿した場合であっても、オイルはすぐに流出口か
ら流出して、ヘッダタンクの下部に溜まることはない。Since the coolant outlet of each core is provided at the lower part of the header tank, even if the oil settles at the lower part of the header tank, the oil immediately flows out of the outlet and flows out of the header. It does not collect at the bottom of the tank.
【００１７】本願第２請求項に記載した発明は、前記請
求項１記載の発明において、前記熱交換器は、コア間を
通流する冷媒の流れが空気の通風方向に対して対向流と
なるように前記各コアを配置した構成の熱交換器であ
る。According to a second aspect of the present invention, in the first aspect of the invention, in the heat exchanger, the flow of the refrigerant flowing between the cores is a counterflow with respect to the direction of air flow. Thus, the heat exchanger has a configuration in which the cores are arranged as described above.
【００１８】冷凍サイクルから冷媒が流入するコアを空
気の通風方向に対して後列に設置し、冷媒が再び冷凍サ
イクルに流出する他のコアを空気の通風方向に対して最
前列に設置すると、前記各コアを備えた熱交換器間を流
通する冷媒の流れは、空気の通風方向に対して対向流と
なる。When the core into which the refrigerant flows from the refrigeration cycle is installed in the rear row with respect to the direction of air flow, and the other core from which the refrigerant flows out again into the refrigeration cycle is installed in the front row with respect to the air flow direction, The flow of the refrigerant flowing between the heat exchangers provided with the respective cores is a counterflow with respect to the air flow direction.
【００１９】このように、空気の通風方向に対して、熱
交換器内を流れる冷媒の流れが対向流となるようにコア
を配置すると、冷凍サイクルから流入した高圧冷媒は、
前記後列に配置したコアを通流して、ある程度熱交換器
されて温度が低下する。この温度がある程度低下した冷
媒が、空気の通風方向に対して最前列となるコアに通流
されることとなる。したがって、この温度の低下した冷
媒は、空気が吹き付けられる最前列のコアに通流され
て、効率よく熱交換される。したがって、コア間を通流
する冷媒の流れが空気の通風方向に対して対向流となる
ように複数のコアを配置した熱交換器は、熱交換性能の
向上が可能となる。As described above, when the core is arranged so that the flow of the refrigerant flowing in the heat exchanger is opposite to the flow direction of the air, the high-pressure refrigerant flowing from the refrigeration cycle becomes
After passing through the cores arranged in the rear row, the heat is exchanged to a certain extent to lower the temperature. The refrigerant whose temperature has decreased to some extent is passed through the core in the front row in the air flow direction. Therefore, the cooled refrigerant is passed through the core in the front row to which air is blown, and heat is efficiently exchanged. Therefore, a heat exchanger in which a plurality of cores are arranged so that the flow of the refrigerant flowing between the cores is opposed to the flow direction of the air can improve the heat exchange performance.
【００２０】本願第３請求項に記載した発明は、前記請
求項１又は２いずれか記載の発明において、前記ヘッダ
タンクは、ヘッダタンク内部に冷媒流路を複数に区画す
る仕切り板を設け、前記仕切り板に区画された冷媒流路
の断面積は、各区画とも略同一である熱交換器である。According to a third aspect of the present invention, in the invention of the first or second aspect, the header tank is provided with a partition plate for partitioning a refrigerant flow path into a plurality of sections inside the header tank. The cross-sectional area of the refrigerant flow path partitioned into the partition plate is a heat exchanger in which each partition is substantially the same.
【００２１】このように、仕切り板によって、冷媒流路
が複数に区画され、区画された各冷媒流路の断面積が同
一であると、熱交換されやすい温度の高い冷媒は、チュ
ーブ間を速い流速で通流し、熱交換されるにしたがって
温度が低下し、外部空気と熱交換されにくくなった冷媒
は、ゆっくりチューブ間を通流し、熱交換される時間が
比較的長くなる。したがって、熱交換性能の向上を図る
ことができる。As described above, when the refrigerant flow path is divided into a plurality by the partition plate, and the cross-sectional area of each of the divided refrigerant flow paths is the same, the high-temperature refrigerant which is likely to exchange heat quickly moves between the tubes. The refrigerant that flows at a flow rate and decreases in temperature as the heat is exchanged, and is less likely to be exchanged with the external air flows slowly between the tubes, and the heat exchange time is relatively long. Therefore, the heat exchange performance can be improved.
【００２２】本願第４請求項に記載した発明は、前記請
求項１乃至３いずれか記載の発明において、前記熱交換
器に流通する冷媒は、二酸化炭素（ＣＯ２）である熱交
換器である。According to a fourth aspect of the present invention, in the invention according to any one of the first to third aspects, the refrigerant flowing through the heat exchanger is carbon dioxide (CO 2 ). .
【００２３】冷媒としてＣＯ２を用いると、ＣＯ２は、
フロンのようにオゾン層を破壊する原因とならないた
め、オゾン層の破壊防止につながる。When CO 2 is used as a refrigerant, CO 2 becomes
It does not cause the destruction of the ozone layer as CFCs do, so it leads to prevention of destruction of the ozone layer.
【００２４】[0024]
【発明の実施の形態】以下、本発明の具体例を図面に基
づいて説明する。Embodiments of the present invention will be described below with reference to the drawings.
【００２５】図１は、熱交換器１の概略構成を示す模式
図である。 図１に示すように、本例の熱交換器１は、
２つの同型の積層型のコア２，３が並列に配置され、各
コア２，３間を冷媒が通流可能となるように連結部材４
で連結して一体の熱交換器１を構成している。FIG. 1 is a schematic diagram showing a schematic configuration of the heat exchanger 1. As shown in FIG. 1, the heat exchanger 1 of the present embodiment
Two identical cores 2 and 3 of the same type are arranged in parallel, and the connecting member 4 is connected so that the refrigerant can flow between the cores 2 and 3.
To form an integrated heat exchanger 1.
【００２６】本例にあっては、各コア２，３の一方の２
ａ，３ａが仕切り板２ｃ，３ｃによってそれぞれ２つの
流路室に区画され、他方のヘッダタンク２ｂ，３ｂに仕
切り板がない。In this example, one of the cores 2 and 3
a, 3a are divided into two flow passage chambers by the partition plates 2c, 3c, respectively, and the other header tanks 2b, 3b have no partition plate.
【００２７】ヘッダタンク２ａ，３ａの上部には冷媒入
口２ｄ，３ｄ、下部には冷媒出口２ｅ，３ｅが設けられ
ている。[0027] Refrigerant inlets 2d and 3d are provided in the upper part of the header tanks 2a and 3a, and refrigerant outlets 2e and 3e are provided in the lower part.
【００２８】コア２の冷媒入口２ｄには入口部材５が、
コア３の冷媒出口３ｅには出口部材６が設けられ、コア
２の冷媒出口２ｅとコア３の冷媒入口３ｄとは連結部材
４で連結されている。At the refrigerant inlet 2d of the core 2, an inlet member 5 is provided.
The refrigerant outlet 3e of the core 3 is provided with an outlet member 6, and the refrigerant outlet 2e of the core 2 and the refrigerant inlet 3d of the core 3 are connected by a connecting member 4.
【００２９】入口部材５を通ってコア２の冷媒入口２ｄ
から入った冷媒は、ヘッダタンク２ａ，２ｂ間を１回往
復して出口部２ｅから出て、連結部材４を通ってコア３
の冷媒入口３ｄから入り、ヘッダタンク３ａ，３ｂ間を
１回往復して冷媒出口３ｅから出口部材６を通って出る
構成となっている。The coolant inlet 2d of the core 2 through the inlet member 5
The refrigerant that has entered from the outlet 3e reciprocates once between the header tanks 2a and 2b, exits the outlet 2e, passes through the connecting member 4, and passes through the core 3
, The refrigerant enters and exits through the inlet member 3d, goes back and forth once between the header tanks 3a and 3b, and exits through the outlet member 6 from the refrigerant outlet 3e.
【００３０】図中の細い方の矢印は、熱交換器１内部を
通流する冷媒の通流方向を示す。本例によれば、各コア
の冷媒の流出口２ｅ，３ｅはヘッダタンクの下部に備え
れられているので、冷媒に溶け込んだオイルがヘッダタ
ンクの下部に沈殿しても、すぐに流出口から流出し、ヘ
ッダタンクの下部に溜まることはない。The thinner arrows in the figure indicate the flow direction of the refrigerant flowing inside the heat exchanger 1. According to this example, the outlets 2e and 3e of the refrigerant of each core are provided at the lower part of the header tank. Therefore, even if the oil dissolved in the refrigerant precipitates at the lower part of the header tank, the outlet immediately from the outlet. It does not escape and collect at the bottom of the header tank.
【００３１】図中の太い方の矢印は、空気の通流方向を
示し、本例の場合、空気の通流方向に対して、熱交換器
１の冷媒入口側のコア２が後列、冷媒出口側のコア３が
前列となるように配置されている。The thick arrow in the drawing indicates the direction of air flow. In the case of this example, the core 2 on the refrigerant inlet side of the heat exchanger 1 is located in the rear row with respect to the air flow direction. The cores 3 on the side are arranged in the front row.
【００３２】すなわち、熱交換器１を流れる冷媒の流れ
は、空気通風方向に対して対向流となっている。That is, the flow of the refrigerant flowing through the heat exchanger 1 is a counterflow with respect to the air flow direction.
【００３３】したがって、高圧冷媒は、まず後列のコア
２を通流して熱交換されてある程度温度が低下し、その
後、空気が吹き付けられる前列のコア３に通流されて効
率良く熱交換される。また、後列のコア２を通流する冷
媒は、冷媒温度が高いため、前列のコア３間を通風して
暖まった空気によっても十分冷却されて効率よく熱交換
される。したがって、冷媒の流れが空気の通風方向に対
して対向流となるように複数のコアを並列に配置する
と、熱交換器の熱交換性能が向上する。Therefore, the high-pressure refrigerant first passes through the cores 2 in the rear row and exchanges heat to lower the temperature to some extent. Then, the high-pressure refrigerant passes through the cores 3 in the front row to which air is blown, and exchanges heat efficiently. Further, since the refrigerant flowing through the cores 2 in the rear row has a high refrigerant temperature, it is sufficiently cooled even by the air that has passed through the cores 3 in the front row and warmed up, so that heat is efficiently exchanged. Therefore, when a plurality of cores are arranged in parallel so that the flow of the refrigerant is opposite to the direction of air flow, the heat exchange performance of the heat exchanger is improved.
【００３４】また、仕切り板２ｃ，３ｃによって上下に
区画されたコア２，３の冷媒流路の断面積は、上下の区
画とも略同一となるように構成されている。The cross-sectional area of the coolant passages of the cores 2 and 3 vertically divided by the partition plates 2c and 3c is configured to be substantially the same as the upper and lower partitions.
【００３５】すなわち、仕切り板２ｃ，３ｃは、上下の
区画がほぼ同じ数のチューブを含むようなヘッダタンク
２ａ，３ａのほぼ中央部に設けられる。That is, the partition plates 2c, 3c are provided substantially at the center of the header tanks 2a, 3a such that the upper and lower sections contain substantially the same number of tubes.
【００３６】ＣＯ２等の超臨界流体を冷媒として用いる
と、コア２に流入する冷媒は，温度が高く、コア２から
流出する段階の冷媒と比較して、その体積は大きくな
る。したがって、低温かつ体積の小さい冷媒が略同一の
冷媒流路を通流した場合と比較して、高温かつ体積の大
きい冷媒の流速は、速くなる。一方、コア３を流通する
冷媒は、コア２を流通して熱交換されているため、コア
２を通流する冷媒と比較して低温かつ体積が小さくな
り、流速は、コア２を通流する冷媒の流速と比較して遅
くなる。When a supercritical fluid such as CO 2 is used as the refrigerant, the refrigerant flowing into the core 2 has a higher temperature and has a larger volume than the refrigerant flowing out of the core 2. Therefore, the flow rate of the high-temperature and large-volume refrigerant is higher than that in the case where the low-temperature and small-volume refrigerant flows through the substantially same refrigerant flow path. On the other hand, since the refrigerant flowing through the core 3 flows through the core 2 and undergoes heat exchange, the refrigerant has a lower temperature and a smaller volume than the refrigerant flowing through the core 2, and the flow velocity of the refrigerant flows through the core 2. It is slower than the flow rate of the refrigerant.
【００３７】したがって、仕切り板２ｃ，３ｃによっ
て，断面積が略同一となるように冷媒流路が区画されて
いると、熱交換されやすい温度の高い冷媒は、チューブ
間を速い速度で通流し、熱交換されるに従って温度が低
下し、外部空気と熱交換されにくくなった冷媒は、ゆっ
くりチューブ間を通流し、熱交換される時間が比較的長
くなる。このように、区画された冷媒流路の断面積が略
同一であると、コアを通流する冷媒の体積変化、通流速
度等を考量して、熱交換性能の向上を図ることが可能と
なる。Therefore, if the refrigerant passages are partitioned by the partition plates 2c, 3c so that the cross-sectional areas are substantially the same, the high-temperature refrigerant that is easily exchanged heat flows between the tubes at a high speed. The refrigerant whose temperature decreases as the heat is exchanged and which is not easily exchanged with the external air flows slowly between the tubes, and the heat exchange time becomes relatively long. As described above, when the sectional areas of the divided refrigerant flow paths are substantially the same, it is possible to improve the heat exchange performance by considering the volume change of the refrigerant flowing through the core, the flow velocity, and the like. Become.
【００３８】本例においては、各コアの冷媒流路が仕切
り板によって上下２つに区画される構成を示したが、仕
切り板の数と配置を変え、３つ以上に区画することも可
能である。In the present embodiment, the structure in which the refrigerant flow path of each core is divided into two upper and lower parts by the partition plate is shown. However, the number and arrangement of the partition plates may be changed to three or more. is there.
【００３９】本例では、冷媒としてＣＯ２を用いている
ため、オゾン層の破壊防止につながる。また、本例で
は、熱交換器は、２つのコアから構成されているが、３
つ以上のコアを同様に連結して構成してもよい。In this embodiment, since CO 2 is used as the refrigerant, the ozone layer is prevented from being destroyed. In this example, the heat exchanger is composed of two cores,
One or more cores may be similarly connected and configured.
【００４０】次に本発明の熱交換器１の他の具体例につ
いて説明する。Next, another specific example of the heat exchanger 1 of the present invention will be described.
【００４１】図２は、前記熱交換器１の他の具体例を示
す模式図であり、前記図１と同一部材には、同一符号を
用いて記載している。FIG. 2 is a schematic diagram showing another specific example of the heat exchanger 1, and the same members as those in FIG. 1 are denoted by the same reference numerals.
【００４２】本例においては、ヘッダタンクに仕切り板
を配置せず、各コアで冷媒流路は区画されていない。In this embodiment, no partition plate is arranged in the header tank, and the refrigerant flow path is not defined by each core.
【００４３】前記具体例においては、冷媒入口とで冷媒
出口が同一のヘッダタンクに設けられていたが、本例に
おいては、冷媒入口２ｄ，３ｄを一方のヘッダタンク２
ｂ，３ａに設け、冷媒出口２ｅ，３ｅを他方のヘッダタ
ンク２ａ，３ｂの下部に設けている。In the specific example, the refrigerant outlet and the refrigerant outlet are provided in the same header tank. In this embodiment, however, the refrigerant inlets 2d and 3d are connected to one header tank 2d.
b, 3a, and refrigerant outlets 2e, 3e are provided below the other header tanks 2a, 3b.
【００４４】コア２の冷媒入口２ｄには、入口部材５を
設け、コア３の冷媒出口３ｅには、出口部材６を設けて
いる。コア２の冷媒出口２ｅとコア３の冷媒入口３ｄ
は、連結部材４で連結されている。An inlet member 5 is provided at a refrigerant inlet 2d of the core 2, and an outlet member 6 is provided at a refrigerant outlet 3e of the core 3. Refrigerant outlet 2e of core 2 and refrigerant inlet 3d of core 3
Are connected by a connecting member 4.
【００４５】入口部材５を通って冷媒入口２ｄからコア
２に流入した冷媒は、ヘッダタンク２ｂから各チューブ
に分配されて他方のヘッダタンク２ａへと移動する。そ
して、冷媒２ａから流出した冷媒は、連結部材４を通っ
て、冷媒入口３ｄからコア３に流入し、ヘッダタンク３
ａから各チューブに分配されてヘッダタンク３ｂへと移
動し、冷媒出口３ｅから出口部材６を通って流出し、冷
凍サイクルを循環する構成となっている。本例の熱交換
器１は、仕切り板を設けていないため、部品点数を減ら
すことができる。The refrigerant flowing into the core 2 from the refrigerant inlet 2d through the inlet member 5 is distributed from the header tank 2b to each tube and moves to the other header tank 2a. The refrigerant flowing out of the refrigerant 2a passes through the connecting member 4, flows into the core 3 from the refrigerant inlet 3d, and flows into the header tank 3d.
From a, it is distributed to each tube, moves to the header tank 3b, flows out from the refrigerant outlet 3e through the outlet member 6, and circulates in the refrigeration cycle. Since the heat exchanger 1 of the present example does not include a partition plate, the number of parts can be reduced.
【００４６】なお、図３は、熱交換器１を構成するコア
２又は３の正面図である。FIG. 3 is a front view of the core 2 or 3 constituting the heat exchanger 1.
【００４７】図３に示すように，本例のコアは２は、チ
ューブ７及びフィン８を交互に多数積層し、これらの積
層されたチューブ７の各両端を一対のヘッダタンク２
ａ，２ｂに連通接続し、積層したチューブ７及びフィン
８の上下にサイドプレート１０，１０を装着した構成の
積層型のコア２である。As shown in FIG. 3, the core 2 of this embodiment has a large number of tubes 7 and fins 8 alternately stacked, and each end of the stacked tubes 7 is connected to a pair of header tanks 2.
This is a laminated core 2 having a configuration in which side plates 10 and 10 are mounted above and below a laminated tube 7 and fins 8, which are connected to a and 2 b, respectively.
【００４８】ヘッダタンク２ａ，２ｂは、円筒状の筒状
部材の両端開口を図示を省略した閉塞部材で閉塞し、筒
状部材の周壁にチューブ７を挿入する複数のチューブ挿
入孔が形成されている。The header tanks 2a and 2b have both ends of a cylindrical tubular member closed by closing members (not shown), and a plurality of tube insertion holes for inserting tubes 7 are formed in the peripheral wall of the cylindrical member. I have.
【００４９】[0049]
【発明の効果】以上説明したように、本発明は、熱交換
チューブとフィンを交互に複数段積層し、前記熱交換チ
ューブを冷媒の送受給が行われるヘッダタンクに連通接
続してなるコアを備え、前記コアはチューブの長手方向
を空気の通気方向に対して直交するように、複数のコア
を並列に配置し、各コア間に媒体を流通する連通部材を
備えた熱交換器において、前記各コアは、冷媒の流入口
をヘッダタンクの上部に備え、冷媒の流出口をヘッダタ
ンクの下部に備えた熱交換器である。As described above, according to the present invention, a core formed by alternately stacking a plurality of heat exchange tubes and fins and connecting the heat exchange tubes to a header tank through which a refrigerant is sent and received is provided. In the heat exchanger, a plurality of cores are arranged in parallel so that the longitudinal direction of the tube is perpendicular to the direction of air flow, and a communication member that circulates a medium between the cores is provided. Each core is a heat exchanger having an inlet for the refrigerant at an upper portion of the header tank and an outlet for the refrigerant at a lower portion of the header tank.
【００５０】各コアの冷媒の流出口は、ヘッダタンクの
下部に備えられているため、オイルがヘッダタンクの下
部に沈殿した場合であっても、オイルはすぐに流出口か
ら流出して、ヘッダタンクの下部に溜まることはない。
したがって、圧縮器には十分量のオイルが供給され、潤
滑油不足による焼き付け等生じることなく、熱交換サイ
クルの安全性・耐久性が確保される。Since the outlet of the refrigerant of each core is provided at the lower part of the header tank, even if the oil settles at the lower part of the header tank, the oil immediately flows out of the outlet and flows out of the header. It does not collect at the bottom of the tank.
Therefore, a sufficient amount of oil is supplied to the compressor, and the safety and durability of the heat exchange cycle are ensured without burning due to lack of lubricating oil.
【００５１】このように、空気の通風方向に対して、熱
交換器内を流れる冷媒の流れが対向流となるようにコア
を配置すると、冷凍サイクルから流入した高圧冷媒は、
前記後列に配置したコアを通流して、ある程度熱交換器
されて温度が低下し、この温度がある程度低下した冷媒
が空気の通風方向に対して最前列となるコアに通流され
て、効率よく熱交換される。したがって、コア間を通流
する冷媒の流れが空気の通風方向に対して対向流となる
ように複数のコアを配置した熱交換器は、熱交換性能の
向上を図ることが可能となる。As described above, when the core is arranged so that the flow of the refrigerant flowing in the heat exchanger is opposite to the flow direction of the air, the high-pressure refrigerant flowing from the refrigeration cycle becomes
Through the cores arranged in the rear row, the temperature is reduced to a certain extent by the heat exchanger, and the refrigerant whose temperature has decreased to a certain extent is passed through the core in the front row with respect to the ventilation direction of the air, so that the efficiency is improved. Heat exchanged. Therefore, the heat exchanger in which the plurality of cores are arranged so that the flow of the refrigerant flowing between the cores is opposite to the flow direction of the air can improve the heat exchange performance.
【００５２】また、本発明の熱交換器は、ヘッダタンク
内部に冷媒流路を複数に区画する仕切り板を設け、前記
仕切り板に区画された冷媒流路の断面積は、各区画とも
略同一となるように構成している。In the heat exchanger of the present invention, a partition plate for partitioning the refrigerant flow path into a plurality of sections is provided inside the header tank, and the cross-sectional area of the refrigerant flow path partitioned by the partition plate is substantially the same for each section. It is configured so that
【００５３】このように、仕切り板によって、冷媒流路
が複数に区画され、区画された各冷媒流路の断面積が同
一であると、熱交換されやすい温度の高い冷媒は、チュ
ーブ間を速い流速で通流し、熱交換されるにしたがって
温度が低下し、外部空気と熱交換されにくくなった冷媒
は、ゆっくりチューブ間を通流し、熱交換される時間が
比較的長くなる。したがって、熱交換性能の向上を図る
ことができる。As described above, when the refrigerant flow path is divided into a plurality by the partition plate, and the cross-sectional area of each of the divided refrigerant flow paths is the same, the high-temperature refrigerant which is likely to exchange heat quickly moves between the tubes. The refrigerant that flows at a flow rate and decreases in temperature as the heat is exchanged, and is less likely to be exchanged with the external air flows slowly between the tubes, and the heat exchange time is relatively long. Therefore, the heat exchange performance can be improved.
【００５４】また、熱交換器を流通する冷媒として、二
酸化炭素（ＣＯ２）を用いると、ＣＯ２は、フロンのよ
うにオゾン層を破壊する原因とならないため、オゾン層
の破壊防止につながる。When carbon dioxide (CO 2 ) is used as the refrigerant flowing through the heat exchanger, CO 2 does not cause the destruction of the ozone layer unlike Freon, and therefore, prevents the ozone layer from being destroyed.
【００５５】[0055]
【図１】本発明の具体例に係り、熱交換器の概略構成を
示す模式図である。FIG. 1 is a schematic diagram showing a schematic configuration of a heat exchanger according to a specific example of the present invention.
【図２】本発明の具体例に係り、熱交換器の概略構成を
示す模式図である。FIG. 2 is a schematic diagram showing a schematic configuration of a heat exchanger according to a specific example of the present invention.
【図３】熱交換器のコアを示す正面図である。FIG. 3 is a front view showing a core of the heat exchanger.
１ 熱交換器 ２ コア ２ａ ヘッダタンク ２ｂ ヘッダタンク ２ｃ 仕切り板 ２ｄ 冷媒入口 ２ｅ 冷媒入口 ３ コア ３ａ ヘッダタンク ３ｂ ヘッダタンク ３ｃ 仕切り板 ３ｄ 冷媒入口 ３ｅ 冷媒出口 ４ 連結部材 ５ 入口部材 ６ 出口部材 ７ チューブ ８ フィン １０ サイドプレート DESCRIPTION OF SYMBOLS 1 Heat exchanger 2 Core 2a Header tank 2b Header tank 2c Partition plate 2d Refrigerant inlet 2e Refrigerant inlet 3 Core 3a Header tank 3b Header tank 3c Partition plate 3d Refrigerant inlet 3e Refrigerant outlet 4 Connecting member 5 Inlet member 6 Outlet member 7 Tube 8 Fin 10 side plate
Claims (4)
積層し、前記熱交換チューブを冷媒の送受給が行われる
ヘッダタンクに連通接続してなるコアを備え、チューブ
の長手方向を空気の通気方向に対して直交するように複
数の前記コアを並列に配置し、各コア間に媒体を流通す
る連通部材を備えた熱交換器において、 前記各コアは、冷媒の流入口をヘッダタンクの上部に備
え、冷媒の流出口をヘッダタンクの下部に備えたことを
特徴とする熱交換器。1. A core comprising a plurality of heat exchange tubes and fins alternately stacked in a plurality of layers, and the heat exchange tubes being connected to a header tank through which a refrigerant is sent and received. In a heat exchanger having a plurality of cores arranged in parallel so as to be orthogonal to a direction and a communication member for circulating a medium between the cores, each core has an inlet for a refrigerant at an upper part of a header tank. Wherein the refrigerant outlet is provided at a lower portion of the header tank.
の流れが空気の通風方向に対して対向流となるように前
記各コアを配置したことを特徴とする前記請求項１記載
の熱交換器。2. The heat exchanger according to claim 1, wherein each of the cores is arranged such that a flow of the refrigerant flowing between the cores is a counterflow with respect to a direction of air flow. Heat exchanger.
に冷媒流路を複数に区画する仕切り板を設け、前記仕切
り板に区画された冷媒流路の断面積は、各区画とも略同
一であることを特徴とする請求項１又は２いずれか記載
の熱交換器。3. The header tank is provided with a partition plate for partitioning a plurality of refrigerant flow paths inside the header tank, and a sectional area of the refrigerant flow path partitioned by the partition plate is substantially the same for each partition. The heat exchanger according to claim 1, wherein:
炭素（ＣＯ２）であることを特徴とした前記請求項１乃
至３いずれか記載の熱交換器。4. The heat exchanger according to claim 1, wherein the refrigerant flowing through the heat exchanger is carbon dioxide (CO 2 ).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32995199A JP2001147095A (en) | 1999-11-19 | 1999-11-19 | Heat exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32995199A JP2001147095A (en) | 1999-11-19 | 1999-11-19 | Heat exchanger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2001147095A true JP2001147095A (en) | 2001-05-29 |
Family
ID=18227097
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP32995199A Pending JP2001147095A (en) | 1999-11-19 | 1999-11-19 | Heat exchanger |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2001147095A (en) |
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| JP2002071291A (en) * | 2000-08-28 | 2002-03-08 | Japan Climate Systems Corp | Heat exchanger |
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| JP4540815B2 (en) * | 2000-08-28 | 2010-09-08 | 株式会社日本クライメイトシステムズ | Heat exchanger |
| JP2005207716A (en) * | 2003-04-21 | 2005-08-04 | Denso Corp | Refrigerant evaporator |
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| JP2016008807A (en) * | 2014-06-26 | 2016-01-18 | 株式会社ケーヒン・サーマル・テクノロジー | Heat exchanging device |
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