JP5573698B2 - Heat exchanger and air conditioner - Google Patents

Heat exchanger and air conditioner Download PDF

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JP5573698B2
JP5573698B2 JP2011011251A JP2011011251A JP5573698B2 JP 5573698 B2 JP5573698 B2 JP 5573698B2 JP 2011011251 A JP2011011251 A JP 2011011251A JP 2011011251 A JP2011011251 A JP 2011011251A JP 5573698 B2 JP5573698 B2 JP 5573698B2
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tube
heat exchanger
flat tube
flat
fin
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JP2012154497A (en
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正憲 神藤
好男 織谷
圭史 芦田
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Daikin Industries Ltd
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28FDETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F1/00Tubular elements; Assemblies of tubular elements
    • F28F1/10Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
    • F28F1/12Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
    • F28F1/24Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending transversely
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28DHEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D1/00Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
    • F28D1/02Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
    • F28D1/04Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits
    • F28D1/053Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being straight
    • F28D1/05316Assemblies of conduits connected to common headers, e.g. core type radiators
    • F28D1/05333Assemblies of conduits connected to common headers, e.g. core type radiators with multiple rows of conduits or with multi-channel conduits
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28FDETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F1/00Tubular elements; Assemblies of tubular elements
    • F28F1/10Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
    • F28F1/12Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
    • F28F1/24Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending transversely
    • F28F1/32Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending transversely the means having portions engaging further tubular elements
    • F28F1/325Fins with openings
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28FDETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2215/00Fins
    • F28F2215/12Fins with U-shaped slots for laterally inserting conduits
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28FDETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2275/00Fastening; Joining
    • F28F2275/04Fastening; Joining by brazing

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Geometry (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Description

本発明は、扁平管とフィンとを備え、扁平管内を流れる流体を空気と熱交換させる熱交換器および空気調和機に関する。   The present invention relates to a heat exchanger and an air conditioner that include a flat tube and fins and exchange heat between fluid flowing in the flat tube and air.

従来より、扁平管とフィンとを備えた熱交換器が知られている。例えば、特許文献1に記載された熱交換器では、左右方向に延びる複数の扁平管が互いに所定の間隔をおいて上下に並べられ、板状のフィンが互いに所定の間隔をおいて扁平管の伸長方向に並べられている。この例では、扁平管と板状のフィンとはロウ付け等で接合されている。   Conventionally, a heat exchanger including a flat tube and fins is known. For example, in the heat exchanger described in Patent Document 1, a plurality of flat tubes extending in the left-right direction are arranged one above the other at a predetermined interval, and plate-like fins are arranged at a predetermined interval from each other. They are arranged in the direction of extension. In this example, the flat tube and the plate-like fin are joined by brazing or the like.

特開2003−262485号公報JP 2003-262485 A

しかしながら、フィンと扁平管のロウ付けに線状のロウ材を用いる場合には、ロウ付け時のロウ材配置によっては、溶けたロウ材がフィンと扁平管の接触部分にうまく入り込まない可能性がある。   However, when a linear brazing material is used for brazing the fin and the flat tube, there is a possibility that the molten brazing material may not enter the contact portion between the fin and the flat tube depending on the brazing material arrangement at the time of brazing. is there.

本発明は前記の問題に着目してなされたものであり、扁平管とフィンとを備えた熱交換器において、フィンと扁平管とを確実にロウ付けできるようにすることを目的としている。   The present invention has been made paying attention to the above-described problem, and an object of the present invention is to ensure brazing between the fin and the flat tube in a heat exchanger including the flat tube and the fin.

前記の課題を解決するため、第1の発明は、
下に配列された複数の扁平管(33)と、該扁平管(33)の配列方向に延びる板状に形成され、上記各扁平管(33)が直交方向に差し込まれる切り欠き部(45)を有する複数のフィン(36)とを備えた熱交換器であって、
前記切り欠き部(45)は、前記扁平管(33)が挿入される管挿入部(46)と、該管挿入部(46)の入り口に、該管挿入部(46)における、前記扁平管(33)を挿入する挿入口側から外に向かって幅広となるように傾斜して繋がる傾斜部(S)とを有し、前記管挿入部(46)の周縁(L1)で前記扁平管(33)を挟み、
前記扁平管(33)における幅方向の端部(33a)は、曲面(S2)で形成され、
前記曲面(S2)と前記周縁(L1)との交点(B)は、前記傾斜部(S)と前記周縁(L1)との交点(A)よりも、前記切り欠き部(45)の奥側にあり、
前記曲面(S2)の頂点(C)は、前記交点(A)よりも、前記切り欠き部(45)の外側にあることを特徴とする。
In order to solve the above-mentioned problem, the first invention
A plurality of flat tubes arranged above under (33), is formed in a plate shape extending in the arrangement direction of該扁flat tube (33), notch above the flat tubes (33) are inserted in orthogonal directions (45 ) Having a plurality of fins (36),
The notch (45) includes a tube insertion portion (46) into which the flat tube (33) is inserted, and the flat tube in the tube insertion portion (46) at the entrance of the tube insertion portion (46). (33) and an inclined portion (S) connected to be inclined so as to be widened outward from the insertion port side into which the tube is inserted, and at the periphery (L1) of the tube insertion portion (46) the flat tube ( 33)
An end (33a) in the width direction of the flat tube (33) is formed by a curved surface (S2),
The curved surface (S2) and the intersection of the peripheral edge (L1) (B), rather than an intersection of said front Ki傾 oblique section (S) and the peripheral edge (L1) (A), the notch (45) On the back side,
The vertex (C) of the curved surface (S2) is located outside the notch (45) with respect to the intersection (A).

また、第の発明は
記傾斜部(S)と前記曲面(S2)とで、ロウ材(100)の載置部を構成していることを特徴とする。
The first invention,
Out with pre-Symbol inclined portion (S) and the curved surface (S2), characterized in that it constitutes a mounting portion of the brazing material (100).

これらの構成ではそれぞれ、扁平管(33)とフィン(36)とをロウ付けする際に、線状のロウ材(100)が、傾斜部(S)と曲面(S2)に乗るように配置すれば、ロウ材(100)の中心(P)を、周縁(L1)の延長線(L2)上に近づけることができる。ロウ材(100)を扁平管(33)毎にこのようにセットして、ロウ材(100)を溶かせば、溶けたロウ材(100)は、管挿入部(46)と扁平管(33)の接触部分に確実に広がる。   In each of these configurations, when brazing the flat tube (33) and the fin (36), the linear brazing material (100) is placed on the inclined portion (S) and the curved surface (S2). For example, the center (P) of the brazing material (100) can be brought close to the extension line (L2) of the peripheral edge (L1). If the brazing material (100) is set in this manner for each flat tube (33) and the brazing material (100) is melted, the melted brazing material (100) will become the tube insertion part (46) and the flat tube (33). It spreads reliably in the contact area.

また、第の発明は、
1の発明の熱交換器が設けられた冷媒回路(20)を備え、
前記冷媒回路(20)において冷媒を循環させて冷凍サイクルを行うことを特徴とする空気調和機である。
In addition, the second invention,
A refrigerant circuit (20) provided with the heat exchanger of the first invention;
It is an air conditioner characterized by performing a refrigeration cycle by circulating a refrigerant in the refrigerant circuit (20).

この構成では、第1の発明の熱交換器が冷媒回路(20)に接続される。熱交換器において、冷媒回路(20)を循環する冷媒は、扁平管(33)の流体通路(34)を流れ、通風路を流れる空気と熱交換する。 In this configuration, the heat exchanger of the first invention is connected to the refrigerant circuit (20). In the heat exchanger, the refrigerant circulating in the refrigerant circuit (20) flows through the fluid passage (34) of the flat tube (33) and exchanges heat with the air flowing through the ventilation passage.

本発明によれば、溶けたロウ材(100)がフィン(36)と扁平管(33)の接触部分に入り込みやすい位置に、ロウ材(100)を容易に配置することが可能になる。その結果、本発明では、扁平管(33)とフィン(36)とを確実にロウ付けすることが可能になる。   According to the present invention, it is possible to easily dispose the brazing material (100) at a position where the melted brazing material (100) easily enters the contact portion between the fin (36) and the flat tube (33). As a result, in the present invention, the flat tube (33) and the fin (36) can be securely brazed.

図1は、本実施形態の熱交換器を備える空気調和機の概略構成を示す冷媒回路図である。FIG. 1 is a refrigerant circuit diagram illustrating a schematic configuration of an air conditioner including a heat exchanger according to the present embodiment. 図2は、熱交換器の概略斜視図である。FIG. 2 is a schematic perspective view of the heat exchanger. 図3は、熱交換器の正面を示す一部断面図である。FIG. 3 is a partial cross-sectional view showing the front of the heat exchanger. 図4は、熱交換器の断面の一部を示す図である。FIG. 4 is a view showing a part of a cross section of the heat exchanger. 図5は、熱交換器のフィンの要部を示す図であって、(A)はフィンの正面図であり、(B)は(A)のG−G断面を示す断面図である。5A and 5B are views showing the main parts of the fins of the heat exchanger, wherein FIG. 5A is a front view of the fins, and FIG. 5B is a cross-sectional view showing a GG section of FIG. 図6は、ロウ材の配置を説明する図である。FIG. 6 is a diagram for explaining the arrangement of the brazing material. 図7は、実施形態の扁平管と管挿入部との関係を風上側から視て示す概略断面図である。FIG. 7 is a schematic cross-sectional view showing the relationship between the flat tube and the tube insertion portion of the embodiment as viewed from the windward side.

以下、本発明の実施形態について図面を参照しながら説明する。なお、以下の実施形態は、本質的に好ましい例示であって、本発明、その適用物、あるいはその用途の範囲を制限することを意図するものではない。   Hereinafter, embodiments of the present invention will be described with reference to the drawings. The following embodiments are essentially preferable examples, and are not intended to limit the scope of the present invention, its application, or its use.

本発明の実施形態について説明する。図1は、本実施形態の熱交換器(30)を備える空気調和機(10)の概略構成を示す冷媒回路図である。実施形態の熱交換器(30)は、後述する空気調和機(10)の室外熱交換器(23)を構成している。   An embodiment of the present invention will be described. FIG. 1 is a refrigerant circuit diagram illustrating a schematic configuration of an air conditioner (10) including a heat exchanger (30) of the present embodiment. The heat exchanger (30) of the embodiment constitutes an outdoor heat exchanger (23) of the air conditioner (10) described later.

−空気調和機−
本実施形態の熱交換器(30)を備えた空気調和機(10)について、図1を参照しながら説明する。
-Air conditioner-
The air conditioner (10) provided with the heat exchanger (30) of the present embodiment will be described with reference to FIG.

〈空気調和機の構成〉
空気調和機(10)は、室外ユニット(11)及び室内ユニット(12)を備えている。室外ユニット(11)と室内ユニット(12)は、液側連絡配管(13)及びガス側連絡配管(14)を介して互いに接続されている。空気調和機(10)では、室外ユニット(11)、室内ユニット(12)、液側連絡配管(13)、及びガス側連絡配管(14)によって、冷媒回路(20)が形成されている。
<Configuration of air conditioner>
The air conditioner (10) includes an outdoor unit (11) and an indoor unit (12). The outdoor unit (11) and the indoor unit (12) are connected to each other via a liquid side connecting pipe (13) and a gas side connecting pipe (14). In the air conditioner (10), the refrigerant circuit (20) is formed by the outdoor unit (11), the indoor unit (12), the liquid side communication pipe (13), and the gas side communication pipe (14).

冷媒回路(20)には、圧縮機(21)と、四方切換弁(22)と、室外熱交換器(23)と、膨張弁(24)と、室内熱交換器(25)とが設けられている。圧縮機(21)、四方切換弁(22)、室外熱交換器(23)、及び膨張弁(24)は、室外ユニット(11)に収容されている。室外ユニット(11)には、室外熱交換器(23)へ室外空気を供給するための室外ファン(15)が設けられている。一方、室内熱交換器(25)は、室内ユニット(12)に収容されている。室内ユニット(12)には、室内熱交換器(25)へ室内空気を供給するための室内ファン(16)が設けられている。   The refrigerant circuit (20) is provided with a compressor (21), a four-way switching valve (22), an outdoor heat exchanger (23), an expansion valve (24), and an indoor heat exchanger (25). ing. The compressor (21), the four-way switching valve (22), the outdoor heat exchanger (23), and the expansion valve (24) are accommodated in the outdoor unit (11). The outdoor unit (11) is provided with an outdoor fan (15) for supplying outdoor air to the outdoor heat exchanger (23). On the other hand, the indoor heat exchanger (25) is accommodated in the indoor unit (12). The indoor unit (12) is provided with an indoor fan (16) for supplying room air to the indoor heat exchanger (25).

冷媒回路(20)は、冷媒が充填された閉回路である。冷媒回路(20)において、圧縮機(21)は、その吐出側が四方切換弁(22)の第1のポートに、その吸入側が四方切換弁(22)の第2のポートに、それぞれ接続されている。また、冷媒回路(20)では、四路四方切換弁(22)の第3のポートから第4のポートへ向かって順に、室外熱交換器(23)と、膨張弁(24)と、室内熱交換器(25)とが配置されている。   The refrigerant circuit (20) is a closed circuit filled with a refrigerant. In the refrigerant circuit (20), the compressor (21) has its discharge side connected to the first port of the four-way switching valve (22) and its suction side connected to the second port of the four-way switching valve (22). Yes. In the refrigerant circuit (20), the outdoor heat exchanger (23), the expansion valve (24), and the indoor heat are sequentially arranged from the third port to the fourth port of the four-way four-way switching valve (22). An exchanger (25) is arranged.

圧縮機(21)は、スクロール型またはロータリ型の全密閉型圧縮機(21)である。四方切換弁(22)は、第1のポートが第3のポートと連通し且つ第2のポートが第4のポートと連通する第1状態(図1に破線で示す状態)と、第1のポートが第4のポートと連通し且つ第2のポートが第3のポートと連通する第2状態(図1に実線で示す状態)とに切り換わる。膨張弁(24)は、いわゆる電子膨張弁(24)である。   The compressor (21) is a scroll type or rotary type hermetic compressor (21). The four-way switching valve (22) has a first state (state indicated by a broken line in FIG. 1) in which the first port communicates with the third port and the second port communicates with the fourth port, The port is switched to a second state (state indicated by a solid line in FIG. 1) in which the port communicates with the fourth port and the second port communicates with the third port. The expansion valve (24) is a so-called electronic expansion valve (24).

室外熱交換器(23)は、室外空気を冷媒と熱交換させる。室外熱交換器(23)は、本実施形態の熱交換器(30)によって構成されている。一方、室内熱交換器(25)は、室内空気を冷媒と熱交換させる。室内熱交換器(25)は、円管である伝熱管を備えたいわゆるクロスフィン型のフィン・アンド・チューブ熱交換器によって構成されている。   The outdoor heat exchanger (23) exchanges heat between the outdoor air and the refrigerant. The outdoor heat exchanger (23) is configured by the heat exchanger (30) of the present embodiment. On the other hand, the indoor heat exchanger (25) exchanges heat between the indoor air and the refrigerant. The indoor heat exchanger (25) is constituted by a so-called cross fin type fin-and-tube heat exchanger provided with a heat transfer tube which is a circular tube.

〈冷房運転〉
空気調和機(10)は、冷房運転を行う。冷房運転中には、四方切換弁(22)が第1状態に設定される。また、冷房運転中には、室外ファン(15)及び室内ファン(16)が運転される。
<Cooling operation>
The air conditioner (10) performs a cooling operation. During the cooling operation, the four-way switching valve (22) is set to the first state. During the cooling operation, the outdoor fan (15) and the indoor fan (16) are operated.

冷媒回路(20)では、冷凍サイクルが行われる。具体的に、圧縮機(21)から吐出された冷媒は、四方切換弁(22)を通って室外熱交換器(23)へ流入し、室外空気へ放熱して凝縮する。室外熱交換器(23)から流出した冷媒は、膨張弁(24)を通過する際に膨張してから室内熱交換器(25)へ流入し、室内空気から吸熱して蒸発する。室内熱交換器(25)から流出した冷媒は、四方切換弁(22)を通過後に圧縮機(21)へ吸入されて圧縮される。室内ユニット(12)は、室内熱交換器(25)において冷却された空気を室内へ供給する。   In the refrigerant circuit (20), a refrigeration cycle is performed. Specifically, the refrigerant discharged from the compressor (21) flows into the outdoor heat exchanger (23) through the four-way switching valve (22), dissipates heat to the outdoor air, and is condensed. The refrigerant flowing out of the outdoor heat exchanger (23) expands when passing through the expansion valve (24), then flows into the indoor heat exchanger (25), absorbs heat from the indoor air, and evaporates. The refrigerant that has flowed out of the indoor heat exchanger (25) passes through the four-way switching valve (22) and then is sucked into the compressor (21) and compressed. The indoor unit (12) supplies the air cooled in the indoor heat exchanger (25) to the room.

〈暖房運転〉
空気調和機(10)は、暖房運転を行う。暖房運転中には、四方切換弁(22)が第2状態に設定される。また、暖房運転中には、室外ファン(15)及び室内ファン(16)が運転される。
<Heating operation>
The air conditioner (10) performs heating operation. During the heating operation, the four-way selector valve (22) is set to the second state. During the heating operation, the outdoor fan (15) and the indoor fan (16) are operated.

冷媒回路(20)では、冷凍サイクルが行われる。具体的に、圧縮機(21)から吐出された冷媒は、四方切換弁(22)を通って室内熱交換器(25)へ流入し、室内空気へ放熱して凝縮する。室内熱交換器(25)から流出した冷媒は、膨張弁(24)を通過する際に膨張してから室外熱交換器(23)へ流入し、室外空気から吸熱して蒸発する。室外熱交換器(23)から流出した冷媒は、四方切換弁(22)を通過後に圧縮機(21)へ吸入されて圧縮される。室内ユニット(12)は、室内熱交換器(25)において加熱された空気を室内へ供給する。   In the refrigerant circuit (20), a refrigeration cycle is performed. Specifically, the refrigerant discharged from the compressor (21) flows into the indoor heat exchanger (25) through the four-way switching valve (22), dissipates heat to the indoor air, and condenses. The refrigerant flowing out of the indoor heat exchanger (25) expands when passing through the expansion valve (24), then flows into the outdoor heat exchanger (23), absorbs heat from the outdoor air, and evaporates. The refrigerant that has flowed out of the outdoor heat exchanger (23) passes through the four-way switching valve (22) and then is sucked into the compressor (21) and compressed. The indoor unit (12) supplies the air heated in the indoor heat exchanger (25) to the room.

−本実施形態の熱交換器−
空気調和機(10)の室外熱交換器(23)を構成する本実施形態の熱交換器(30)について説明する。
-Heat exchanger of this embodiment-
The heat exchanger (30) of this embodiment which comprises the outdoor heat exchanger (23) of an air conditioner (10) is demonstrated.

〈熱交換器の全体構成〉
図2は、本実施形態の熱交換器(30)の概略斜視図である。また、図3は、本実施形態の熱交換器(30)の正面を示す一部断面図である。図2及び図3に示すように、本実施形態の熱交換器(30)は、一つの第1ヘッダ集合管(31)と、一つの第2ヘッダ集合管(32)と、多数の扁平管(33)と、多数のフィン(36)とを備えている。第1ヘッダ集合管(31)、第2ヘッダ集合管(32)、扁平管(33)、及びフィン(36)は、何れもアルミニウム合金製の部材であって、互いにロウ付けによって接合されている。
<Overall configuration of heat exchanger>
FIG. 2 is a schematic perspective view of the heat exchanger (30) of the present embodiment. FIG. 3 is a partial cross-sectional view showing the front of the heat exchanger (30) of the present embodiment. As shown in FIGS. 2 and 3, the heat exchanger (30) of the present embodiment includes one first header collecting pipe (31), one second header collecting pipe (32), and many flat tubes. (33) and a large number of fins (36). The first header collecting pipe (31), the second header collecting pipe (32), the flat pipe (33), and the fin (36) are all made of an aluminum alloy and are joined to each other by brazing. .

第1ヘッダ集合管(31)と第2ヘッダ集合管(32)は、何れも両端が閉塞された細長い中空円筒状に形成されている。図3では、熱交換器(30)の左端に第1ヘッダ集合管(31)が立設され、熱交換器(30)の右端に第2ヘッダ集合管(32)が立設されている。つまり、第1ヘッダ集合管(31)と第2ヘッダ集合管(32)は、それぞれの軸方向が上下方向となる姿勢で設置されている。   Each of the first header collecting pipe (31) and the second header collecting pipe (32) is formed in an elongated hollow cylindrical shape whose both ends are closed. In FIG. 3, the first header collecting pipe (31) is erected at the left end of the heat exchanger (30), and the second header collecting pipe (32) is erected at the right end of the heat exchanger (30). That is, the first header collecting pipe (31) and the second header collecting pipe (32) are installed in such a posture that their respective axial directions are in the vertical direction.

図3に示すように、扁平管(33)は、その断面形状が扁平な長円形あるいは角の丸い矩形となった伝熱管である。熱交換器(30)において、複数の扁平管(33)は、その伸長方向が左右方向となり、且つそれぞれの平坦な側面が互いに向かい合う姿勢で配置されている。また、複数の扁平管(33)は、互いに一定の間隔をおいて上下に並んで配置されている。各扁平管(33)は、その一端部が第1ヘッダ集合管(31)に挿入され、その他端部が第2ヘッダ集合管(32)に挿入されている。   As shown in FIG. 3, the flat tube (33) is a heat transfer tube whose cross-sectional shape is a flat oval or a rounded rectangle. In the heat exchanger (30), the plurality of flat tubes (33) are arranged in a posture in which the extending direction is the left-right direction and the flat side surfaces face each other. In addition, the plurality of flat tubes (33) are arranged side by side at regular intervals. Each flat tube (33) has one end inserted into the first header collecting tube (31) and the other end inserted into the second header collecting tube (32).

図4は、熱交換器(30)の断面の一部を示す図である。図4に示すように、各扁平管(33)には、複数の流体通路(34)が形成されている。各流体通路(34)は、扁平管(33)の伸長方向に延びる通路である。各扁平管(33)において、複数の流体通路(34)は、扁平管(33)の伸長方向と直交する幅方向に一列に並んでいる。各扁平管(33)に形成された複数の流体通路(34)は、それぞれの一端が第1ヘッダ集合管(31)の内部空間に連通し、それぞれの他端が第2ヘッダ集合管(32)の内部空間に連通している。熱交換器(30)へ供給された冷媒は、扁平管(33)の流体通路(34)を流れる間に空気と熱交換する。   FIG. 4 is a view showing a part of a cross section of the heat exchanger (30). As shown in FIG. 4, each flat tube (33) is formed with a plurality of fluid passages (34). Each fluid passage (34) is a passage extending in the extending direction of the flat tube (33). In each flat tube (33), the plurality of fluid passages (34) are arranged in a line in the width direction orthogonal to the extending direction of the flat tube (33). One end of each of the plurality of fluid passages (34) formed in each flat pipe (33) communicates with the internal space of the first header collecting pipe (31), and the other end of each of the plurality of fluid passages (34) is the second header collecting pipe (32 ). The refrigerant supplied to the heat exchanger (30) exchanges heat with air while flowing through the fluid passage (34) of the flat tube (33).

〈フィンの構成〉
図4に示すように、フィン(36)は、金属板をプレス加工することによって形成された縦長の板状フィンである。フィン(36)には、フィン(36)の前縁(38)からフィン(36)の幅方向に延びる細長い切り欠き部(45)が、多数形成されている。フィン(36)では、多数の切り欠き部(45)が、フィン(36)の長手方向に一定の間隔で形成されている。切り欠き部(45)の風下寄りの部分は、管挿入部(46)を構成している。管挿入部(46)は、上下方向の幅が扁平管(33)の厚さと実質的に等しい。また、管挿入部(46)の長さは、扁平管(33)の幅と実質的に等しい。それぞれの扁平管(33)は、フィン(36)の管挿入部(46)に挿入され、管挿入部(46)の周縁部とロウ付けによって接合される。このロウ付けのため、本実施形態は、切り欠き部(45)の形状と扁平管(33)の形状の関係に特徴がある。この特徴については後に詳述する。
<Fin configuration>
As shown in FIG. 4, the fin (36) is a vertically long plate-like fin formed by pressing a metal plate. The fin (36) has a number of elongated notches (45) extending in the width direction of the fin (36) from the front edge (38) of the fin (36). In the fin (36), a large number of notches (45) are formed at regular intervals in the longitudinal direction of the fin (36). The portion closer to the lee of the notch (45) constitutes the tube insertion portion (46). The tube insertion portion (46) has a vertical width substantially equal to the thickness of the flat tube (33). The length of the tube insertion part (46) is substantially equal to the width of the flat tube (33). Each flat tube (33) is inserted into the tube insertion portion (46) of the fin (36) and joined to the peripheral portion of the tube insertion portion (46) by brazing. Because of this brazing, this embodiment is characterized by the relationship between the shape of the notch (45) and the shape of the flat tube (33). This feature will be described in detail later.

フィン(36)では、隣り合う切り欠き部(45)の間の部分が伝熱部(37)を構成し、管挿入部(46)の風下側の部分が風下側板部(47)を構成している。つまり、フィン(36)には、扁平管(33)を挟んで上下に隣り合う複数の伝熱部(37)と、各伝熱部(37)の風下側の端部に連続する一つの風下側板部(47)とが設けられている。本実施形態の熱交換器(30)では、フィン(36)の伝熱部(37)が上下に並んだ扁平管(33)の間に配置され、風下側板部(47)が扁平管(33)よりも風下側へ突出している。伝熱部(37)同士間が通風路を構成している。   In the fin (36), the part between the adjacent notches (45) constitutes the heat transfer part (37), and the leeward side part of the tube insertion part (46) constitutes the leeward side plate part (47). ing. In other words, the fin (36) has a plurality of heat transfer portions (37) adjacent to each other up and down across the flat tube (33), and one leeward continuous to the leeward end of each heat transfer portion (37). A side plate portion (47) is provided. In the heat exchanger (30) of the present embodiment, the heat transfer section (37) of the fin (36) is disposed between the flat tubes (33) arranged in the vertical direction, and the leeward side plate portion (47) is disposed in the flat tube (33 ) Protrudes further to the leeward side. Between the heat transfer parts (37) constitutes a ventilation path.

図5は、本実施形態の熱交換器(30)のフィンの要部を示す図であって、(A)はフィンの正面図であり、(B)は(A)のG−G断面を示す断面図である。図5に示すように、フィン(36)の伝熱部(37)及び風下側板部(47)には、複数のルーバー(50,60)が形成されている。各ルーバー(50,60)は、伝熱部(37)及び風下側板部(47)を切り起こすことによって形成されている。   FIG. 5: is a figure which shows the principal part of the fin of the heat exchanger (30) of this embodiment, Comprising: (A) is a front view of a fin, (B) is GG cross section of (A). It is sectional drawing shown. As shown in FIG. 5, a plurality of louvers (50, 60) are formed in the heat transfer section (37) and the leeward side plate section (47) of the fin (36). Each louver (50, 60) is formed by raising the heat transfer section (37) and the leeward side plate section (47).

〈フィンと扁平管のロウ付け〉
図6は、ロウ材(100)の配置を説明する図である。同図は、熱交換器(30)の断面の一部を示している。フィン(36)の切り欠き部(45)は、管挿入部(46)の幅(W1)よりも広い幅(W2)を有する幅広部(45a)を有している。また、切り欠き部(45)は、管挿入部(46)の入り口側で、該管挿入部(46)の入り口に、該管挿入部(46)における、前記扁平管(33)を挿入する挿入口側から外に向かって幅広となるように傾斜して繋がる傾斜部(S)を有している。ここで、図6に示すように、扁平管(33)の扁平部分を挟む、管挿入部(46)の周縁部をL1とし、該周縁(L1)と傾斜部(S)との交点をAとする。
<Brazing of fins and flat tubes>
FIG. 6 is a view for explaining the arrangement of the brazing material (100). The figure shows a part of a cross section of the heat exchanger (30). The notch (45) of the fin (36) has a wide portion (45a) having a width (W2) wider than the width (W1) of the tube insertion portion (46). The notch (45) inserts the flat tube (33) in the tube insertion portion (46) into the inlet of the tube insertion portion (46) on the inlet side of the tube insertion portion (46). It has an inclined portion (S) that is inclined and connected so as to become wider from the insertion port side toward the outside. Here, as shown in FIG. 6, the peripheral portion of the tube insertion portion (46) sandwiching the flat portion of the flat tube (33) is L1, and the intersection of the peripheral portion (L1) and the inclined portion (S) is A. And

本実施形態の扁平管(33)は、幅方向の端部(33a)が曲面(S2)になっている。図6に示すように、端部(33a)(曲面(S2))の断面形状は、この例では半円状になっている。この半円状の部分は、周縁(L1)と接している。図6に示す断面において、端部(33a)と周縁(L1)との交点(B)(接点)は、交点(A)よりも下側、すなわち管挿入部(46)の奥側に位置している。また、図6に示すように、端部(33a)の頂点(C)は、交点(A)よりも上側、すなわち管挿入部(46)の外側に位置している。   As for the flat tube (33) of this embodiment, the edge part (33a) of the width direction is a curved surface (S2). As shown in FIG. 6, the cross-sectional shape of the end portion (33a) (curved surface (S2)) is a semicircular shape in this example. This semicircular portion is in contact with the peripheral edge (L1). In the cross section shown in FIG. 6, the intersection (B) (contact point) between the end (33a) and the peripheral edge (L1) is located below the intersection (A), that is, on the back side of the tube insertion portion (46). ing. Moreover, as shown in FIG. 6, the vertex (C) of the end portion (33a) is located above the intersection (A), that is, outside the tube insertion portion (46).

ロウ材(100)は、図6の紙面垂直方向に延びる線状のロウ材である。この例では、図6に示すように、ロウ材(100)は円形断面をしている。ロウ付けを行う際には、ロウ材(100)は、傾斜部(S)と曲面(S2)上(前記半円状の部分)に乗るように配置する。すなわち、傾斜部(S)と前記曲面(S2)とで、ロウ材(100)の載置部を構成している。このようにロウ材を配置することで、ロウ材の中心(P)を、周縁(L1)の延長線(L2)上に近づけることができる。   The brazing material (100) is a linear brazing material extending in the direction perpendicular to the paper surface of FIG. In this example, as shown in FIG. 6, the brazing material (100) has a circular cross section. When brazing, the brazing material (100) is disposed so as to ride on the inclined portion (S) and the curved surface (S2) (the semicircular portion). That is, the inclined portion (S) and the curved surface (S2) constitute a placement portion for the brazing material (100). By arranging the brazing material in this way, the center (P) of the brazing material can be brought close to the extension line (L2) of the peripheral edge (L1).

図7は、扁平管(33)と管挿入部(46)との関係を風上側から視て示す概略断面図である。図7に示すように、扁平管(33)がフィン(36)の管挿入部(46)に差し込まれた状態では、扁平管(33)と管挿入部(46)の縁部(46a)との間に、略Vの字状の溝(70)が形成される。この状態で、扁平管(33)と管挿入部(46)とのロウ付けが行われ、扁平管(33)が管挿入部(46)の縁部(46a)と接合される。その際、扁平管(33)と管挿入部(46)の縁部(46a)との間に上記溝(70)が形成されて、縁部(46a)の縁端部分では加工上の公差やばらつきにより、扁平管(33)と管挿入部(46)の間には若干の隙間(例えば100分の数ミリ程度の隙間)ができている。そのため、溶融したロウ材は毛細管現象によって上記隙間の部分等に積極的に流れ込む。これにより、扁平管(33)と切り欠き部(45)の縁部(46a)との接合部において十分な量のロウ材が確保される。そのため、扁平管(33)がフィン(36)と確実に接合される。特に、管挿入部(46)の縁部(46a)の全周に亘って上記溝(70)が形成されるため、扁平管(33)のほぼ全周とフィン(36)とが確実に密着する。   FIG. 7 is a schematic cross-sectional view showing the relationship between the flat tube (33) and the tube insertion portion (46) as viewed from the windward side. As shown in FIG. 7, when the flat tube (33) is inserted into the tube insertion portion (46) of the fin (36), the flat tube (33) and the edge (46a) of the tube insertion portion (46) In between, a substantially V-shaped groove (70) is formed. In this state, the flat tube (33) and the tube insertion portion (46) are brazed, and the flat tube (33) is joined to the edge (46a) of the tube insertion portion (46). At that time, the groove (70) is formed between the flat tube (33) and the edge (46a) of the tube insertion portion (46), and the edge portion of the edge (46a) Due to the variation, a slight gap (for example, a gap of about several hundredths of a millimeter) is formed between the flat tube (33) and the tube insertion portion (46). Therefore, the molten brazing material actively flows into the gap portion and the like by a capillary phenomenon. As a result, a sufficient amount of brazing material is secured at the joint between the flat tube (33) and the edge (46a) of the notch (45). Therefore, the flat tube (33) is securely joined to the fin (36). In particular, since the groove (70) is formed over the entire periphery of the edge (46a) of the tube insertion portion (46), almost the entire periphery of the flat tube (33) and the fin (36) are securely adhered to each other. To do.

また、縁部(46a)がない場合であっても、一般的に加工上の公差やばらつきにより、扁平管(33)と管挿入部(46)の間には若干の隙間(例えば100分の数ミリ程度の隙間)ができる。そのため、この場合にも扁平管(33)と管挿入部(46)との間に、溶融したロウ材が毛細管現象によって流れ込む。   Even when there is no edge (46a), a slight gap (for example, 100 minutes) is generally formed between the flat tube (33) and the tube insertion portion (46) due to processing tolerances and variations. A gap of about a few millimeters is possible. Therefore, also in this case, the molten brazing material flows between the flat tube (33) and the tube insertion portion (46) by capillary action.

したがって、ロウ材(100)を扁平管(33)毎に上記のようにセットし、例えば熱交換器(30)を加熱炉(図示は省略)に入れてロウ材を溶かせば、ロウ材の中心(P)が、前記延長線(L2)上の近くに位置するので、溶けたロウ材は、管挿入部(46)と扁平管(33)の接触部分(周縁(L1))に確実に入り込む。これにより、扁平管(33)とフィン(36)とが確実に接合される。   Therefore, if the brazing material (100) is set for each flat tube (33) as described above, for example, the heat exchanger (30) is placed in a heating furnace (not shown) to melt the brazing material, the center of the brazing material Since (P) is located near the extension line (L2), the molten brazing material surely enters the contact portion (periphery (L1)) of the tube insertion part (46) and the flat tube (33). . Thereby, a flat tube (33) and a fin (36) are joined reliably.

《本実施形態における効果》
以上のように本実施形態によれば、溶けたロウ材(100)がフィン(36)と扁平管(33)の接触部分に入り込みやすい位置に、ロウ材(100)を容易に配置することが可能になる。その結果、本実施形態では、扁平管(33)とフィン(36)とを確実にロウ付けすることが可能になる。
<< Effect in this embodiment >>
As described above, according to the present embodiment, the brazing material (100) can be easily disposed at a position where the melted brazing material (100) easily enters the contact portion between the fin (36) and the flat tube (33). It becomes possible. As a result, in the present embodiment, the flat tube (33) and the fin (36) can be brazed reliably.

《その他の実施形態》
なお、扁平管(33)における端部(33a)の形状は例示である。例えば、断面が楕円となるように構成することも可能である。
<< Other Embodiments >>
In addition, the shape of the edge part (33a) in a flat tube (33) is an illustration. For example, the cross section may be an ellipse.

また、フィン(36)に設けたルーバー(50,60)の形状、配置、数は例示である。また、ルーバー(50,60)に代えて、フィン(36)の一部分を膨出させるようにしてもよい。   The shape, arrangement, and number of louvers (50, 60) provided on the fin (36) are merely examples. Further, instead of the louvers (50, 60), a part of the fin (36) may be bulged.

本発明は、扁平管とフィンとを備え、扁平管内を流れる流体を空気と熱交換させる熱交換器および空気調和機として有用である。   The present invention includes a flat tube and fins, and is useful as a heat exchanger and an air conditioner for exchanging heat between fluid flowing in the flat tube and air.

10 空気調和機
20 冷媒回路
33 扁平管
33a 端部
34 流体通路(通路)
36 フィン
45 切り欠き部
46 管挿入部
S 傾斜部
DESCRIPTION OF SYMBOLS 10 Air conditioner 20 Refrigerant circuit 33 Flat tube 33a End part 34 Fluid path (passage)
36 Fin 45 Notch 46 Pipe insertion part S Inclination part

Claims (2)

下に配列された複数の扁平管(33)と、該扁平管(33)の配列方向に延びる板状に形成され、上記各扁平管(33)が直交方向に差し込まれる切り欠き部(45)を有する複数のフィン(36)とを備えた熱交換器であって、
前記切り欠き部(45)は、前記扁平管(33)が挿入される管挿入部(46)と、該管挿入部(46)の入り口に、該管挿入部(46)における、前記扁平管(33)を挿入する挿入口側から外に向かって幅広となるように傾斜して繋がる傾斜部(S)とを有し、前記管挿入部(46)の周縁(L1)で前記扁平管(33)を挟み、
前記扁平管(33)における幅方向の端部(33a)は、曲面(S2)で形成され、
前記曲面(S2)と前記周縁(L1)との交点(B)は、前記傾斜部(S)と前記周縁(L1)との交点(A)よりも、前記切り欠き部(45)の奥側にあり、
前記曲面(S2)の頂点(C)は、前記交点(A)よりも、前記切り欠き部(45)の外側にあり、
前記傾斜部(S)と前記曲面(S2)とで、ロウ材(100)の載置部を構成していることを特徴とする熱交換器。
A plurality of flat tubes arranged above under (33), is formed in a plate shape extending in the arrangement direction of該扁flat tube (33), notch above the flat tubes (33) are inserted in orthogonal directions (45 ) Having a plurality of fins (36),
The notch (45) includes a tube insertion portion (46) into which the flat tube (33) is inserted, and the flat tube in the tube insertion portion (46) at the entrance of the tube insertion portion (46). (33) and an inclined portion (S) connected to be inclined so as to be widened outward from the insertion port side into which the tube is inserted, and at the periphery (L1) of the tube insertion portion (46) the flat tube ( 33)
An end (33a) in the width direction of the flat tube (33) is formed by a curved surface (S2),
The curved surface (S2) and the intersection of the peripheral edge (L1) (B), rather than an intersection of said front Ki傾 oblique section (S) and the peripheral edge (L1) (A), the notch (45) On the back side,
The apex of the curved surface (S2) (C), the also the intersection point (A), Ri outside near the notch (45),
The inclined portion (S) and the curved surface (S2) constitute a mounting portion for the brazing material (100) .
請求項の熱交換器が設けられた冷媒回路(20)を備え、
前記冷媒回路(20)において冷媒を循環させて冷凍サイクルを行うことを特徴とする空気調和機。
A refrigerant circuit (20) provided with the heat exchanger according to claim 1 ,
An air conditioner that performs a refrigeration cycle by circulating a refrigerant in the refrigerant circuit (20).
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WO2015040746A1 (en) 2013-09-20 2015-03-26 三菱電機株式会社 Heat exchanger, air conditioner device using said heat exchanger, and method for producing said heat exchanger
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