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WO2019058847A1 - Heat exchanger - Google Patents

Heat exchanger Download PDF

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Publication number
WO2019058847A1
WO2019058847A1 PCT/JP2018/030888 JP2018030888W WO2019058847A1 WO 2019058847 A1 WO2019058847 A1 WO 2019058847A1 JP 2018030888 W JP2018030888 W JP 2018030888W WO 2019058847 A1 WO2019058847 A1 WO 2019058847A1
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WIPO (PCT)
Prior art keywords
hole
heat exchanger
tubes
reduction process
tube
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.)
Ceased
Application number
PCT/JP2018/030888
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French (fr)
Japanese (ja)
Inventor
石井　裕
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Sanden Corp
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Sanden Holdings Corp
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Filing date
Publication date
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Publication of WO2019058847A1 publication Critical patent/WO2019058847A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D1/00—Heat-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
    • F28D1/02—Heat-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
    • F28D1/04—Heat-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
    • F28D1/053—Heat-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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F1/00—Tubular elements; Assemblies of tubular elements
    • F28F1/02—Tubular elements of cross-section which is non-circular
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F1/00—Tubular elements; Assemblies of tubular elements
    • F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
    • F28F1/12—Tubular 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
    • F28F1/24—Tubular 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
    • F28F1/30—Tubular 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 being attachable to the element
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F13/00—Arrangements for modifying heat-transfer, e.g. increasing, decreasing
    • F28F13/06—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media
    • F28F13/08—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media by varying the cross-section of the flow channels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F17/00—Removing ice or water from heat-exchange apparatus

Definitions

  • the present invention relates to a heat exchanger.
  • An object of the present invention is to suppress frost formation more effectively.
  • the heat exchanger according to one aspect of the present invention is Let directions orthogonal to each other be a first direction, a second direction, and a third direction, A plurality of through holes are provided extending in the first direction and spaced in the second direction, and a plurality of through holes provided in the first direction and spaced in the third direction are formed in each of the through holes.
  • Piping members through which the heat medium flows A plurality of plate members fixed between adjacent piping members, extending in a third direction and spaced apart in the first direction; Heat exchange is performed between the heat medium flowing through the through hole of the piping member and the air flowing in the third direction around the piping member and around the plate member, With respect to the through holes formed on the windward side, reduction processing is performed to make the cross-sectional area smaller than that of the through holes formed on the windward side.
  • the flow rate of the heat medium decreases on the windward side, and the temperature difference with the air is suppressed, so frost formation can be suppressed more effectively.
  • FIG. 1 is a diagram showing a heat exchanger.
  • the heat exchanger 11 functions as an evaporator in a heat pump cycle and a refrigeration circuit, such as a car air conditioner and a showcase.
  • the aluminum heat exchanger 11 includes a pair of upper and lower headers 12, a plurality of tubes 13 (pipe members), and a plurality of fins 14 (plate members).
  • the pair of headers 12 extend in the lateral direction and are spaced apart in the longitudinal direction.
  • the header 12 is formed by a cylindrical pipe whose both ends are closed, and the inside is divided by the partition wall 17 into compartments aligned in the lateral direction.
  • the upper header 12 is internally divided into a section 12A at one end in the lateral direction and a section 12B at the other end in the lateral direction, and an inlet 15 is provided in the section 12A at the one end in the lateral direction.
  • the lower header 12 is internally divided into a section 12C at one end in the lateral direction and a section 12D at the other end in the lateral direction, and a discharge port 16 is provided in the section 12D at the other end in the lateral direction.
  • Each tube 13 extends in the longitudinal direction, and the upper end and the lower end are respectively connected to the header 12 and provided at equal intervals along the lateral direction.
  • the tube 13 has a laterally thin flat shape, and both ends thereof are in communication with the inside of the header 12 and brazed to the header 12.
  • 13a to 13l are sequentially arranged from one end in the lateral direction to the other end.
  • the tube 13 d and the tube 13 e are partitioned by the partition wall 17, and in the lower header 12, the tube 13 h and the tube 13 i are partitioned by the partition wall 17.
  • Each fin 14 is fixed by brazing between adjacent tubes 13.
  • a flow path is formed by the header 12 and the tube 13, through which a refrigerant (heat medium) flows. That is, first, it flows into the section 12A on one end side in the lateral direction of the upper header 12 through the inflow port 15, is distributed to the tubes 13a to 13d, and then flows into the section 12C on one end side in the lateral direction of the lower header 12. Next, after being distributed to the tubes 13e to 13h, they flow into the section 12B on the other end side in the lateral direction in the upper header 12 and then are distributed to the tubes 13i to 13l and then to the other end side in the lateral direction on the lower header 12. It flows into the compartment 12 D and is discharged through the discharge port 16. Thus, as the coolant flows through each tube 13, it exchanges heat with the air flowing around the tubes 13 and the fins 14. That is, the refrigerant evaporates and evaporates to raise the temperature by heat absorption, whereby one air is cooled.
  • a refrigerant heat medium
  • FIG. 2 is a view showing a tube and a fin.
  • (A) in the figure is a view of the tube 13 and the fins 14 as viewed from the windward side in the width direction.
  • the fins 14 are corrugated fins in which thin plates are formed in a rectangular wave shape. Thereby, it becomes possible to integrate and form a plurality of thin plates provided at intervals in the longitudinal direction.
  • Each region surrounded by the fins 14 and the tube 13 serves as a ventilation passage 21 for flowing air in the width direction.
  • (B) in the figure is a view of the tube 13 and the fins 14 as viewed from the longitudinal direction, and the tube 13 is shown in cross section.
  • the tube 13 is formed with a plurality of through holes 22 extending in the longitudinal direction and aligned along the width direction, and the coolant flows through the through holes 22.
  • One end on the windward side in the width direction in the fin 14 is flush and unified so as to be aligned with one end of the tube 13.
  • FIG. 3 is a view showing a tube.
  • the tubes 13a disposed on the upstream side through which the refrigerant flows are shown, but the tubes 13b, 13c, and 13d have the same configuration.
  • (A) in the figure is a view of the header 12 and the tube 13a viewed from the lateral direction
  • (b) in the figure is a view showing an AA cross section
  • (c) in the figure is a BB cross section FIG.
  • a compressed portion 31 is formed by pressing from both sides along the horizontal direction.
  • the closed part 32 which completely closed the flow path is formed.
  • FIG. 4 is an enlarged view of the end of the tube.
  • An insertion hole 33 is formed in the header 12, and one end side of the tube 13 a is inserted into the insertion hole 33.
  • a compression portion 34 is formed by pressing from both sides along the width direction.
  • the compression part 31 is formed in the range in which the compression part 34 is formed.
  • the die for press processing is designed so that the compression unit 31 and the compression unit 34 can be simultaneously processed.
  • a mold for originally pressing the tube 13a from both sides along the lateral direction is required, and a structure capable of press-forming the compression section 31 may be added thereto. .
  • FIG. 5 is a view schematically showing the state of frost formation.
  • the tubes 13a to 13f are illustrated, the through holes 22 through which the refrigerant flows are hatched, and the through holes 22 through which the refrigerant does not flow are illustrated in white.
  • the refrigerant does not flow because the through hole 22 on the upwind side is blocked, and the refrigerant flows to the through hole 22 on the downwind side than that.
  • the through-hole 22 on the upwind side acts as a heat insulating part because the refrigerant does not flow, and the temperature difference with air is suppressed, so it is possible to suppress frost formation on the tips of the tubes 13a to 13d.
  • frost 35 gradually adheres to the fins 14 positioned between the tubes 13a and 13b, between 13b and 13c, and between 13c and 13d, but in a small amount.
  • the refrigerant also flows through the through hole 22 on the upwind side, but heat exchange with air has already been performed on the upstream side, and the refrigerant temperature rises. Since the temperature difference with air is suppressed, frosting is unlikely to occur originally.
  • frost 36 which gradually adheres to the fins 14 located between the tubes 13d and 13e and between 13e and 13f.
  • FIG. 6 is the figure which showed typically the mode of the frost formation in a comparative example.
  • the tubes 13a to 13f are shown, and the through holes 22 through which the refrigerant flows are shown by hatching, and the refrigerant flows through all the through holes 22 including the through hole 22 on the windward side. Therefore, the frost 37 easily adheres to the tips of the upstream tubes 13a to 13d. Furthermore, the frost 38 easily adheres to the fins 14 positioned between the tubes 13a and 13b, between 13b and 13c, and between 13c and 13d, so that the air passage 21 is easily closed. As described above, by forming the compression portion 31 on the upstream side tubes 13a to 13d and closing the through hole 22 formed on the windward side, frost formation can be effectively suppressed.
  • the compression part 31 is formed only to the through-hole 22 formed in the windward side, it is possible to minimize the decrease in the heat exchange efficiency.
  • the compression section 31 is formed only by the tubes 13a to 13d on the upstream side among the plurality of tubes 13a to 13l, the decrease in heat exchange efficiency can be minimized.
  • the compression section 31 is formed by pressing the windward ends of the tubes 13a to 13d from both sides along the width direction, the processing can be easily performed. Further, if the compression section 31 and the compression section 34 are simultaneously press-processed, the number of steps and the cost will not be increased.
  • the compression portion 31 is formed only at the end portion on the upstream side along the longitudinal direction in the through hole 22, it can be processed more easily than forming the compression portion 31 over the entire length.
  • the closed portion 32 is formed only at the upstream end of the through hole 22 along the longitudinal direction, but the present invention is not limited to this.
  • the closed portion 32 is formed over the entire length of the through hole 22
  • FIG. 7 is a view showing a through hole in which a closed portion is formed over the entire length.
  • the compression portion 31 is formed over the entire length in the longitudinal direction of the tube 13 a, and thus the closed portion 32 is formed over the entire length of the through hole 22. This makes it possible to completely suppress the entry of the refrigerant.
  • the compressed portion 31 is formed to form the closed portion 32 which completely closes the through hole 22.
  • the present invention is not limited to this. That is, the through hole 22 formed on the windward side may be reduced only to make the cross-sectional area smaller than that of the through hole 22 formed on the windward side.
  • FIG. 8 is a view showing a through hole whose cross-sectional area is reduced.
  • a reduction part 41 whose cross-sectional area is reduced is formed in the inside of the compression part 31, only in the through hole 22 on the windward side.
  • a reduction part 41 whose cross-sectional area is reduced is formed.
  • the contraction portion 41 does not completely block the flow path, the flow rate of the refrigerant is reduced, which also suppresses the temperature difference from the air, and frost formation can be effectively suppressed.
  • one end on the windward side in the width direction in the fin 14 is flush and unified so as to be aligned with one end of the tube 13, but is not limited to this. That is, the fin 14 may be formed with an extending portion 42 extended on the windward side of the ventilation passage 21 along the width direction.
  • FIG. 9 is a view showing a fin in which an extension is formed.
  • the extension amounts (lengths) of the extensions 42 are uniform. There is no extension on the leeward side in the width direction of the fins 14. As described above, by forming the extension portion 42, even if the frosts 35 and 36 are gradually attached to the front end, it is possible to suppress that the air passage 21 is blocked.
  • the compression portion 31 is formed by pressing the tube 13 from both sides along the lateral direction, but the invention is not limited thereto. That is, since it is only necessary to close the through hole 22, the through hole 22 on the upwind side may be closed by the brazing material 43, for example.
  • FIG. 10 is a view showing a through hole closed by a brazing material. The brazing material 43 is brazed to the through-hole 22 on the upwind side, and the flow path is completely blocked. Thus, it is sufficient that the flow path can be closed without crushing the through hole 22.
  • all the tubes 13a to 13l may be made common, and only the upstream tubes 13a to 13d may be closed with the brazing material 43. As a result, it is not necessary to change the press die between the tubes 13a to 13d on the upstream side and the tubes 13e to 13l on the downstream side, and the cost increase can be suppressed.
  • the compression portion 31 is formed only on the upstream side tubes 13a to 13d, but the invention is not limited to this, and the compression portion 31 may be formed on all the tubes 13a to 13l. Good. As a result, it is not necessary to change the press die between the tubes 13a to 13d on the upstream side and the tubes 13e to 13l on the downstream side, and the cost increase can be suppressed.
  • the header 12 extends in the lateral direction, and the tube 13 extends in the longitudinal direction.
  • the present invention is not limited thereto.
  • the header 12 extends in the longitudinal direction and the tube 13 extends in the lateral direction It may be

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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)

Abstract

Le problème décrit par la présente invention est d'empêcher une formation de givre de manière plus efficace. La solution selon l'invention porte sur l'exécution d'un traitement de réduction au moyen duquel les aires de section transversale de trous traversants 22 formés du côté au vent sont rendues plus petites que celles des trous traversants 22 formés du côté sous le vent.The problem described by the present invention is to prevent frost formation more effectively. The solution according to the invention relates to the execution of a reduction treatment by means of which the cross-sectional areas of through-holes 22 formed on the windward side are made smaller than those of through-holes 22 formed on the leeward side. .

Description

熱交換器Heat exchanger

　本発明は、熱交換器に関するものである。 The present invention relates to a heat exchanger.

　冷媒管を流れる冷媒とフィンを通過する空気との間で熱交換を行なう熱交換器では、フィンの先端に着霜して通風路が塞がれると、熱交換効率が低下してしまう。特許文献１では、着霜によって通風路が塞がれることを抑制するために、フィンを冷媒管よりも風上側に延長させることを提案している。 In a heat exchanger that performs heat exchange between the refrigerant flowing through the refrigerant pipe and the air passing through the fins, if the air passage is blocked by frosting on the tip of the fins, the heat exchange efficiency decreases. In patent document 1, in order to suppress that a ventilation path is obstruct | occluded by frost formation, extending a fin to windward rather than a refrigerant pipe is proposed.

特開２０１２－１６３３２３号公報JP 2012-163323 A

　しかしながら、フィンを冷媒管よりも風上側に延長させるだけでは、着霜を十分に抑制できない可能性がある。
　本発明の課題は、着霜をより効果的に抑制することである。 However, extending the fins to the windward side more than the refrigerant pipe may not sufficiently suppress frost formation.
An object of the present invention is to suppress frost formation more effectively.

　本発明の一態様に係る熱交換器は、
　互いに直交する方向を、第一の方向、第二の方向、及び第三の方向とし、
　第一の方向に延び第二の方向に間隔を空けて複数設けられ、夫々には第一の方向に延び第三の方向に間隔を空けて複数設けられた貫通孔が形成され、貫通孔に熱媒体が流れる配管部材と、
　隣り合う配管部材同士の間に固定され、第三の方向に延び、第一の方向に間隔を空けて設けられた複数の板部材と、を備え、
　配管部材の貫通孔を流れる熱媒体と、配管部材の周囲及び板部材の周囲を第三の方向に流れる空気と、の間で熱交換を行なうものであり、
　風上側に形成された貫通孔に対して、風下側に形成された貫通孔よりも断面積を小さくする縮小加工が行なわれている。 The heat exchanger according to one aspect of the present invention is
Let directions orthogonal to each other be a first direction, a second direction, and a third direction,
A plurality of through holes are provided extending in the first direction and spaced in the second direction, and a plurality of through holes provided in the first direction and spaced in the third direction are formed in each of the through holes. Piping members through which the heat medium flows;
A plurality of plate members fixed between adjacent piping members, extending in a third direction and spaced apart in the first direction;
Heat exchange is performed between the heat medium flowing through the through hole of the piping member and the air flowing in the third direction around the piping member and around the plate member,
With respect to the through holes formed on the windward side, reduction processing is performed to make the cross-sectional area smaller than that of the through holes formed on the windward side.

　本発明によれば、風上側で熱媒体の流量が減少し、空気との温度差が抑制されるので、着霜をより効果的に抑制することができる。 According to the present invention, the flow rate of the heat medium decreases on the windward side, and the temperature difference with the air is suppressed, so frost formation can be suppressed more effectively.

熱交換器を示す図である。It is a figure showing a heat exchanger. チューブ及びフィンを示した図である。It is a figure showing a tube and a fin. チューブを示した図である。It is a figure showing a tube. チューブの差し込み端部を拡大した図である。It is the figure which expanded the insertion end part of the tube. 着霜の様子を模式的に示した図である。It is the figure which showed the mode of frost formation typically. 比較例における着霜の様子を模式的に示した図である。It is the figure which showed typically the mode of frost formation in a comparative example. 全長にわたって閉塞部が形成された貫通孔を示す図である。It is a figure which shows the through-hole in which the closure part was formed over the full length. 断面積が小さくされた貫通孔を示す図である。It is a figure which shows the through-hole in which the cross-sectional area was made small. 延長部が形成されたフィンを示す図である。It is a figure which shows the fin in which the extension part was formed. ろう材によって閉塞された貫通孔を示す図である。It is a figure which shows the through-hole closed by the brazing material.

　以下、本発明の実施形態を図面に基づいて説明する。なお、各図面は模式的なものであって、現実のものとは異なる場合がある。また、以下の実施形態は、本発明の技術的思想を具体化するための装置や方法を例示するものであり、構成を下記のものに特定するものでない。すなわち、本発明の技術的思想は、特許請求の範囲に記載された技術的範囲内において、種々の変更を加えることができる。 Hereinafter, embodiments of the present invention will be described based on the drawings. Each drawing is schematic and may be different from the actual one. In addition, the following embodiments illustrate apparatuses and methods for embodying the technical idea of the present invention, and the configuration is not specified to the following. That is, the technical idea of the present invention can be variously modified within the technical scope described in the claims.

《実施形態》
　《構成》
　以下の説明では、互いに直交する三方向を、便宜的に、縦方向（第一の方向）、横方向（第二の方向）、及び幅方向（第三の方向）とする。
　図１は、熱交換器を示す図である。
　熱交換器１１は、カーエアコンやショーケース等、ヒートポンプサイクル及び冷凍回路において、蒸発器として機能するものである。アルミ製の熱交換器１１は、上下一対のヘッダ１２と、複数のチューブ１３（配管部材）と、複数のフィン１４（板部材）と、を備える。 << Embodiment >>
"Constitution"
In the following description, for convenience, the three directions orthogonal to one another are taken as the longitudinal direction (first direction), the lateral direction (second direction), and the width direction (third direction).
FIG. 1 is a diagram showing a heat exchanger.
The heat exchanger 11 functions as an evaporator in a heat pump cycle and a refrigeration circuit, such as a car air conditioner and a showcase. The aluminum heat exchanger 11 includes a pair of upper and lower headers 12, a plurality of tubes 13 (pipe members), and a plurality of fins 14 (plate members).

　一対のヘッダ１２は、横方向に延び、縦方向に間隔を空けて設けられている。ヘッダ１２は、両端が閉塞された円筒状の配管によって形成されており、内部は隔壁１７によって横方向に並んだ区画に仕切られている。上方のヘッダ１２は、内部が横方向一端側の区画１２Ａと横方向他端側の区画１２Ｂとに分けられており、横方向一端側の区画１２Ａには流入口１５が設けられている。下方のヘッダ１２は、内部が横方向一端側の区画１２Ｃと横方向他端側の区画１２Ｄとに分けられており、横方向他端側の区画１２Ｄには排出口１６が設けられている。 The pair of headers 12 extend in the lateral direction and are spaced apart in the longitudinal direction. The header 12 is formed by a cylindrical pipe whose both ends are closed, and the inside is divided by the partition wall 17 into compartments aligned in the lateral direction. The upper header 12 is internally divided into a section 12A at one end in the lateral direction and a section 12B at the other end in the lateral direction, and an inlet 15 is provided in the section 12A at the one end in the lateral direction. The lower header 12 is internally divided into a section 12C at one end in the lateral direction and a section 12D at the other end in the lateral direction, and a discharge port 16 is provided in the section 12D at the other end in the lateral direction.

　各チューブ１３は、縦方向に延び、上端及び下端の夫々がヘッダ１２に接続され、横方向に沿って等間隔に設けられている。チューブ１３は横方向に薄い扁平形状であり、両端をヘッダ１２の内部に連通させてヘッダ１２にろう付けされている。ここでは１２本ある場合を示してあり、夫々を識別する場合は、横方向の一端から他端に向かって順に１３ａ～１３ｌとする。上方のヘッダ１２では、チューブ１３ｄとチューブ１３ｅとの間が隔壁１７によって仕切られており、下方のヘッダ１２では、チューブ１３ｈとチューブ１３ｉとの間が隔壁１７によって仕切られている。
　各フィン１４は、隣り合うチューブ１３同士の間にろう付けによって固定されている。 Each tube 13 extends in the longitudinal direction, and the upper end and the lower end are respectively connected to the header 12 and provided at equal intervals along the lateral direction. The tube 13 has a laterally thin flat shape, and both ends thereof are in communication with the inside of the header 12 and brazed to the header 12. Here, the case where there are 12 lines is shown, and when identifying each of them, 13a to 13l are sequentially arranged from one end in the lateral direction to the other end. In the upper header 12, the tube 13 d and the tube 13 e are partitioned by the partition wall 17, and in the lower header 12, the tube 13 h and the tube 13 i are partitioned by the partition wall 17.
Each fin 14 is fixed by brazing between adjacent tubes 13.

　ヘッダ１２及びチューブ１３によって、流路が形成されており、そこを冷媒（熱媒体）が流れる。すなわち、先ず流入口１５を介して上方のヘッダ１２における横方向一端側の区画１２Ａへ流入し、チューブ１３ａ～１３ｄに分配されてから下方のヘッダ１２における横方向一端側の区画１２Ｃへ流入する。次にチューブ１３ｅ～１３ｈに分配されてから上方のヘッダ１２における横方向他端側の区画１２Ｂへ流入し、次にチューブ１３ｉ～１３ｌに分配されてから下方のヘッダ１２における横方向他端側の区画１２Ｄへ流入し、排出口１６を介して排出される。こうして、冷媒は各チューブ１３を流れるときに、チューブ１３及びフィン１４の周囲を流れる空気との間で熱交換を行なう。すなわち、冷媒は蒸発気化することで吸熱によって昇温され、一方の空気が冷やされる。 A flow path is formed by the header 12 and the tube 13, through which a refrigerant (heat medium) flows. That is, first, it flows into the section 12A on one end side in the lateral direction of the upper header 12 through the inflow port 15, is distributed to the tubes 13a to 13d, and then flows into the section 12C on one end side in the lateral direction of the lower header 12. Next, after being distributed to the tubes 13e to 13h, they flow into the section 12B on the other end side in the lateral direction in the upper header 12 and then are distributed to the tubes 13i to 13l and then to the other end side in the lateral direction on the lower header 12. It flows into the compartment 12 D and is discharged through the discharge port 16. Thus, as the coolant flows through each tube 13, it exchanges heat with the air flowing around the tubes 13 and the fins 14. That is, the refrigerant evaporates and evaporates to raise the temperature by heat absorption, whereby one air is cooled.

　次に、チューブ１３及びフィン１４の詳細について説明する。
　図２は、チューブ及びフィンを示した図である。
　図中の（ａ）はチューブ１３及びフィン１４を幅方向の風上側から見た図である。
　フィン１４は、薄板を矩形波状に形成したコルゲートフィンである。これにより、縦方向に間隔を空けて設けられた複数の薄板を一体化して形成することが可能となる。このフィン１４とチューブ１３とで囲まれた各領域が、幅方向に空気を流すための通風路２１となる。 Next, details of the tube 13 and the fins 14 will be described.
FIG. 2 is a view showing a tube and a fin.
(A) in the figure is a view of the tube 13 and the fins 14 as viewed from the windward side in the width direction.
The fins 14 are corrugated fins in which thin plates are formed in a rectangular wave shape. Thereby, it becomes possible to integrate and form a plurality of thin plates provided at intervals in the longitudinal direction. Each region surrounded by the fins 14 and the tube 13 serves as a ventilation passage 21 for flowing air in the width direction.

　図中の（ｂ）はチューブ１３及びフィン１４を縦方向から見た図であり、チューブ１３についてはその断面を示す。
　チューブ１３には、縦方向に延び、幅方向に沿って並んだ複数の貫通孔２２が形成されており、各貫通孔２２に冷媒が流れる。
　フィン１４における幅方向の風上側となる一端は、チューブ１３の一端と揃うように面一で統一されている。 (B) in the figure is a view of the tube 13 and the fins 14 as viewed from the longitudinal direction, and the tube 13 is shown in cross section.
The tube 13 is formed with a plurality of through holes 22 extending in the longitudinal direction and aligned along the width direction, and the coolant flows through the through holes 22.
One end on the windward side in the width direction in the fin 14 is flush and unified so as to be aligned with one end of the tube 13.

　図３は、チューブを示した図である。
　ここでは、チューブ１３ａ～１３ｌのうち、冷媒が流れる上流側に配置されたチューブ１３ａを示しているが、チューブ１３ｂ、１３ｃ、１３ｄについても同様の構成である。
　図中の（ａ）はヘッダ１２及びチューブ１３ａを横方向から見た図であり、図中の（ｂ）はＡ－Ａ断面を示す図であり、図中の（ｃ）はＢ－Ｂ断面を示す図である。
　チューブ１３ａのうち、縦方向における上流側の端部で、且つ幅方向における風上側の端部には、横方向に沿った両側からプレス加工を行なった圧縮部３１が形成されている。圧縮部３１の内部では、最も風上側に形成された貫通孔２２のみが圧潰され、流路を完全に閉塞した閉塞部３２が形成されている。 FIG. 3 is a view showing a tube.
Here, among the tubes 13a to 13l, the tubes 13a disposed on the upstream side through which the refrigerant flows are shown, but the tubes 13b, 13c, and 13d have the same configuration.
(A) in the figure is a view of the header 12 and the tube 13a viewed from the lateral direction, (b) in the figure is a view showing an AA cross section, and (c) in the figure is a BB cross section FIG.
In the end of the tube 13a on the upstream side in the vertical direction, and at the end of the windward side in the width direction, a compressed portion 31 is formed by pressing from both sides along the horizontal direction. In the inside of the compression part 31, only the through hole 22 formed on the windward side is crushed, and the closed part 32 which completely closed the flow path is formed.

　図４は、チューブの端部を拡大した図である。
　ヘッダ１２には差込穴３３が形成されており、この差込穴３３にチューブ１３ａの一端側が差し込まれる。チューブ１３ａにおける縦方向の一端側には、差込穴３３への差し込みを容易にするために、幅方向に沿った両側からプレス加工を行なった圧縮部３４が形成されている。この圧縮部３４が形成されている範囲内で圧縮部３１が形成されている。プレス加工の金型は、圧縮部３１と圧縮部３４とを同時に加工できるように設計しておく。なお、圧縮部３４をプレス成形するには、元々、チューブ１３ａを横方向に沿った両側から押さえる金型が必要とされるため、そこに圧縮部３１をプレス成形可能な構造を追加すればよい。 FIG. 4 is an enlarged view of the end of the tube.
An insertion hole 33 is formed in the header 12, and one end side of the tube 13 a is inserted into the insertion hole 33. At one end side in the longitudinal direction of the tube 13a, in order to facilitate insertion into the insertion hole 33, a compression portion 34 is formed by pressing from both sides along the width direction. The compression part 31 is formed in the range in which the compression part 34 is formed. The die for press processing is designed so that the compression unit 31 and the compression unit 34 can be simultaneously processed. In order to press-mold the compression section 34, a mold for originally pressing the tube 13a from both sides along the lateral direction is required, and a structure capable of press-forming the compression section 31 may be added thereto. .

　《作用》
　次に、実施形態の主要な作用効果について説明する。
　暖房運転時に熱交換器１１を蒸発器として使用する場合、周囲の空気を冷却するため、チューブ１３やフィン１４の先端側に着霜が生じやすく、通風路２１が閉塞されると熱交換効率が低下してしまう。
　そこで、チューブ１３ａ～１３ｌのうち、上流側のチューブ１３ａ～１３ｄにおいて、縦方向における上流側の端部、且つ幅方向における風上側の端部に、圧縮部３１を形成している。この圧縮部３１により、最も風上側に形成された貫通孔２２のみを圧潰し、流路を完全に閉塞している。これにより、最も風上側の貫通孔２２には冷媒が流れず、空気との温度差が抑制されるので、着霜をより効果的に抑制することができる。 << Operation >>
Next, main functions and effects of the embodiment will be described.
When the heat exchanger 11 is used as an evaporator during heating operation, frost is likely to be formed on the tip side of the tube 13 and the fins 14 to cool the surrounding air, and if the air passage 21 is blocked, heat exchange efficiency is increased. It will decrease.
Therefore, in the tubes 13a to 13d on the upstream side among the tubes 13a to 13l, the compression portion 31 is formed at the upstream end in the vertical direction and the windward end in the width direction. Only the through hole 22 formed on the windward side is crushed by the compression section 31, and the flow path is completely closed. As a result, the refrigerant does not flow through the through hole 22 on the windward side and the temperature difference with the air is suppressed, so frost formation can be suppressed more effectively.

　図５は、着霜の様子を模式的に示した図である。
　ここでは、チューブ１３ａ～１３ｆだけを図示し、冷媒が流れる貫通孔２２を網掛けで示し、冷媒が流れない貫通孔２２を白抜きで示している。上流側のチューブ１３ａ～１３ｄでは、最も風上側の貫通孔２２が閉塞されているため冷媒が流れず、それよりも風下側の貫通孔２２には冷媒が流れる。最も風上側の貫通孔２２は、冷媒が流れないことで断熱部として作用し、空気との温度差が抑制されるので、チューブ１３ａ～１３ｄの先端への着霜を抑制することができる。また、チューブ１３ａと１３ｂとの間、１３ｂと１３ｃとの間、及び１３ｃと１３ｄとの間に位置するフィン１４に、徐々に霜３５が付着してゆくが少量である。一方、下流側のチューブ１３ｅ～１３ｌでは、最も風上側の貫通孔２２にも冷媒が流れているが、既に上流側にて空気との熱交換が行なわれており、冷媒温度が上昇することにより、空気との温度差が抑制されているため、元々、着霜が生じにくい。また、チューブ１３ｄと１３ｅとの間、及び１３ｅと１３ｆとの間に位置するフィン１４に、徐々に付着してゆく霜３６も少量である。 FIG. 5 is a view schematically showing the state of frost formation.
Here, only the tubes 13a to 13f are illustrated, the through holes 22 through which the refrigerant flows are hatched, and the through holes 22 through which the refrigerant does not flow are illustrated in white. In the tubes 13a to 13d on the upstream side, the refrigerant does not flow because the through hole 22 on the upwind side is blocked, and the refrigerant flows to the through hole 22 on the downwind side than that. The through-hole 22 on the upwind side acts as a heat insulating part because the refrigerant does not flow, and the temperature difference with air is suppressed, so it is possible to suppress frost formation on the tips of the tubes 13a to 13d. In addition, frost 35 gradually adheres to the fins 14 positioned between the tubes 13a and 13b, between 13b and 13c, and between 13c and 13d, but in a small amount. On the other hand, in the tubes 13e to 13l on the downstream side, the refrigerant also flows through the through hole 22 on the upwind side, but heat exchange with air has already been performed on the upstream side, and the refrigerant temperature rises. Since the temperature difference with air is suppressed, frosting is unlikely to occur originally. There is also a small amount of frost 36 which gradually adheres to the fins 14 located between the tubes 13d and 13e and between 13e and 13f.

　ここで、圧縮部３１を設けない場合の比較例について説明する。
　図６は、比較例における着霜の様子を模式的に示した図である。
　ここでは、チューブ１３ａ～１３ｆだけを図示し、冷媒が流れる貫通孔２２を網掛けで示しており、最も風上側の貫通孔２２を含め全ての貫通孔２２に冷媒が流れている。したがって、上流側のチューブ１３ａ～１３ｄの先端に霜３７が付着しやすい。さらに、チューブ１３ａと１３ｂとの間、１３ｂと１３ｃとの間、及び１３ｃと１３ｄとの間に位置するフィン１４にも、霜３８が付着しやすく、通風路２１を塞ぎやすい。
　このように、上流側のチューブ１３ａ～１３ｄに対して圧縮部３１を形成し、最も風上側に形成された貫通孔２２を閉塞することで、着霜を効果的に抑制することができる。 Here, a comparative example in which the compression unit 31 is not provided will be described.
FIG. 6: is the figure which showed typically the mode of the frost formation in a comparative example.
Here, only the tubes 13a to 13f are shown, and the through holes 22 through which the refrigerant flows are shown by hatching, and the refrigerant flows through all the through holes 22 including the through hole 22 on the windward side. Therefore, the frost 37 easily adheres to the tips of the upstream tubes 13a to 13d. Furthermore, the frost 38 easily adheres to the fins 14 positioned between the tubes 13a and 13b, between 13b and 13c, and between 13c and 13d, so that the air passage 21 is easily closed.
As described above, by forming the compression portion 31 on the upstream side tubes 13a to 13d and closing the through hole 22 formed on the windward side, frost formation can be effectively suppressed.

　また、最も風上側に形成された貫通孔２２に対してのみ、圧縮部３１を形成しているので、熱交換効率が低下することを最小限に抑制することができる。
　また、複数のチューブ１３ａ～１３ｌのうち上流側のチューブ１３ａ～１３ｄでのみ、圧縮部３１を形成しているので、熱交換効率が低下することを最小限に抑制できる。
　また、チューブ１３ａ～１３ｄにおける風上側の端部を幅方向に沿った両側からプレス加工することにより、圧縮部３１を形成しているので、容易に加工することができる。また、圧縮部３１と圧縮部３４とを同時にプレス加工すれば、工数や費用が増大することもない。
　また、貫通孔２２における縦方向に沿った上流側の端部のみ、圧縮部３１を形成しているので、全長にわたって圧縮部３１を形成するよりも、容易に加工することができる。 Moreover, since the compression part 31 is formed only to the through-hole 22 formed in the windward side, it is possible to minimize the decrease in the heat exchange efficiency.
In addition, since the compression section 31 is formed only by the tubes 13a to 13d on the upstream side among the plurality of tubes 13a to 13l, the decrease in heat exchange efficiency can be minimized.
In addition, since the compression section 31 is formed by pressing the windward ends of the tubes 13a to 13d from both sides along the width direction, the processing can be easily performed. Further, if the compression section 31 and the compression section 34 are simultaneously press-processed, the number of steps and the cost will not be increased.
In addition, since the compression portion 31 is formed only at the end portion on the upstream side along the longitudinal direction in the through hole 22, it can be processed more easily than forming the compression portion 31 over the entire length.

　《変形例》
　実施形態では、貫通孔２２における縦方向に沿った上流側の端部のみ、閉塞部３２を形成しているが、これに限定されるものではなく、貫通孔２２の全長にわたって閉塞部３２を形成してもよい。
　図７は、全長にわたって閉塞部が形成された貫通孔を示す図である。
　ここでは、チューブ１３ａにおける縦方向の全長にわたって圧縮部３１が形成されており、したがって貫通孔２２の全長にわたって閉塞部３２が形成されている。これにより、冷媒の侵入を完全に抑制できる。 << Modification >>
In the embodiment, the closed portion 32 is formed only at the upstream end of the through hole 22 along the longitudinal direction, but the present invention is not limited to this. The closed portion 32 is formed over the entire length of the through hole 22 You may
FIG. 7 is a view showing a through hole in which a closed portion is formed over the entire length.
Here, the compression portion 31 is formed over the entire length in the longitudinal direction of the tube 13 a, and thus the closed portion 32 is formed over the entire length of the through hole 22. This makes it possible to completely suppress the entry of the refrigerant.

　実施形態では、圧縮部３１を形成することで、貫通孔２２を完全に閉塞した閉塞部３２を形成しているが、これに限定されるものではない。すなわち、風上側に形成された貫通孔２２に対して、風下側に形成された貫通孔２２よりも断面積を小さくする縮小加工を行なうだけでもよい。
　図８は、断面積が小さくされた貫通孔を示す図である。
　圧縮部３１の内部では、最も風上側の貫通孔２２にのみ、断面積を小さくした縮小部４１が形成されている。縮小部４１は、流路を完全に閉塞することはないが、冷媒の流量を減少させるので、これによっても空気との温度差が抑制され、着霜を効果的に抑制することができる。なお、断面積を小さくすると流速が増加するが、同時に流路抵抗となるため、侵入冷媒量が減少し、更に冷媒には潤滑のためのオイルが添加されているため、このオイルの粘性によって極端に流速が増加することはない。 In the embodiment, the compressed portion 31 is formed to form the closed portion 32 which completely closes the through hole 22. However, the present invention is not limited to this. That is, the through hole 22 formed on the windward side may be reduced only to make the cross-sectional area smaller than that of the through hole 22 formed on the windward side.
FIG. 8 is a view showing a through hole whose cross-sectional area is reduced.
In the inside of the compression part 31, only in the through hole 22 on the windward side, a reduction part 41 whose cross-sectional area is reduced is formed. Although the contraction portion 41 does not completely block the flow path, the flow rate of the refrigerant is reduced, which also suppresses the temperature difference from the air, and frost formation can be effectively suppressed. Note that if the cross-sectional area is reduced, the flow velocity increases, but at the same time, the flow path resistance is reduced, and the amount of intruding refrigerant decreases, and further oil for lubrication is added to the refrigerant. There is no increase in flow velocity.

　実施形態では、フィン１４における幅方向の風上側となる一端は、チューブ１３の一端と揃うように面一で統一されているが、これに限定されるものではない。すなわち、フィン１４には、幅方向に沿って通風路２１よりも風上側に延長させた延長部４２を形成してもよい。
　図９は、延長部が形成されたフィンを示す図である。
　ここでは、各延長部４２の延長量（長さ）は統一されている。なお、フィン１４における幅方向の風下側に延長部はない。このように、延長部４２を形成することで、その先端に徐々に霜３５、３６が付着してゆくとしても、通風路２１が閉塞されることを抑制できる。 In the embodiment, one end on the windward side in the width direction in the fin 14 is flush and unified so as to be aligned with one end of the tube 13, but is not limited to this. That is, the fin 14 may be formed with an extending portion 42 extended on the windward side of the ventilation passage 21 along the width direction.
FIG. 9 is a view showing a fin in which an extension is formed.
Here, the extension amounts (lengths) of the extensions 42 are uniform. There is no extension on the leeward side in the width direction of the fins 14. As described above, by forming the extension portion 42, even if the frosts 35 and 36 are gradually attached to the front end, it is possible to suppress that the air passage 21 is blocked.

　実施形態では、チューブ１３に対して、横方向に沿った両側からプレス加工を行なった圧縮部３１を形成しているが、これに限定されるものではない。すなわち、貫通孔２２を閉塞できればよいので、最も風上側の貫通孔２２を例えばろう材４３によって閉塞してもよい。
　図１０は、ろう材によって閉塞された貫通孔を示す図である。
　最も風上側の貫通孔２２に対して、ろう材４３がろう付けされ、流路を完全に閉塞している。このように、貫通孔２２を圧潰しなくとも、その流路を塞ぐことができればよい。この場合、チューブ１３ａ～１３ｌを全て共通化し、上流側のチューブ１３ａ～１３ｄだけに、ろう材４３による閉塞を行なえばよい。これにより、上流側のチューブ１３ａ～１３ｄと、下流側のチューブ１３ｅ～１３ｌとで、プレス金型を変更する必要がなくなり、コストアップを抑制できる。 In the embodiment, the compression portion 31 is formed by pressing the tube 13 from both sides along the lateral direction, but the invention is not limited thereto. That is, since it is only necessary to close the through hole 22, the through hole 22 on the upwind side may be closed by the brazing material 43, for example.
FIG. 10 is a view showing a through hole closed by a brazing material.
The brazing material 43 is brazed to the through-hole 22 on the upwind side, and the flow path is completely blocked. Thus, it is sufficient that the flow path can be closed without crushing the through hole 22. In this case, all the tubes 13a to 13l may be made common, and only the upstream tubes 13a to 13d may be closed with the brazing material 43. As a result, it is not necessary to change the press die between the tubes 13a to 13d on the upstream side and the tubes 13e to 13l on the downstream side, and the cost increase can be suppressed.

　実施形態では、上流側のチューブ１３ａ～１３ｄに対してのみ、圧縮部３１を形成しているが、これに限定されるものではなく、チューブ１３ａ～１３ｌの全てに圧縮部３１を形成してもよい。これにより、上流側のチューブ１３ａ～１３ｄと、下流側のチューブ１３ｅ～１３ｌとで、プレス金型を変更する必要がなくなり、コストアップを抑制できる。
　実施形態では、ヘッダ１２が横方向に延び、チューブ１３が縦方向に延びる構成にしているが、これに限定されるものではなく、ヘッダ１２が縦方向に延び、チューブ１３が横方向に延びる構成としてもよい。 In the embodiment, the compression portion 31 is formed only on the upstream side tubes 13a to 13d, but the invention is not limited to this, and the compression portion 31 may be formed on all the tubes 13a to 13l. Good. As a result, it is not necessary to change the press die between the tubes 13a to 13d on the upstream side and the tubes 13e to 13l on the downstream side, and the cost increase can be suppressed.
In the embodiment, the header 12 extends in the lateral direction, and the tube 13 extends in the longitudinal direction. However, the present invention is not limited thereto. The header 12 extends in the longitudinal direction and the tube 13 extends in the lateral direction It may be

　以上、限られた数の実施形態を参照しながら説明したが、権利範囲はそれらに限定されるものではなく、上記の開示に基づく実施形態の改変は、当業者にとって自明のことである。 Although the foregoing has been described with reference to a limited number of embodiments, the scope of rights is not limited to them, and modifications of the embodiments based on the above disclosure are obvious to those skilled in the art.

　１１　熱交換器
　１３　チューブ（配管部材）
　１４　フィン（板部材）
　２１　通風路
　３１　圧縮部
　３２　閉塞部
　４１　縮小部
　４２　延長部
　４３　ろう材 11 heat exchanger 13 tube (pipe member)
14 Fin (plate member)
21 air passage 31 compression portion 32 closed portion 41 reduction portion 42 extension portion 43 brazing material

Claims (7)

　互いに直交する方向を、第一の方向、第二の方向、及び第三の方向とし、
　前記第一の方向に延び前記第二の方向に間隔を空けて複数設けられ、夫々には前記第一の方向に延び前記第三の方向に間隔を空けて複数設けられた貫通孔が形成され、前記貫通孔に熱媒体が流れる配管部材と、
　隣り合う前記配管部材同士の間に固定され、前記第三の方向に延び、前記第一の方向に間隔を空けて設けられた複数の板部材と、を備え、
　前記配管部材の前記貫通孔を流れる前記熱媒体と、前記配管部材の周囲及び前記板部材の周囲を前記第三の方向に流れる空気と、の間で熱交換を行なうものであり、
　風上側に形成された前記貫通孔に対して、風下側に形成された前記貫通孔よりも断面積を小さくする縮小加工が行なわれていることを特徴とする熱交換器。 Let directions orthogonal to each other be a first direction, a second direction, and a third direction,
A plurality of through holes extending in the first direction and spaced in the second direction are provided, and a plurality of through holes are provided extending in the first direction and spaced in the third direction. A piping member through which a heat medium flows through the through hole;
A plurality of plate members fixed between the adjacent piping members, extending in the third direction and spaced apart in the first direction;
Heat exchange is performed between the heat medium flowing through the through hole of the piping member and air flowing around the piping member and around the plate member in the third direction,
A heat exchanger characterized in that reduction processing is performed on the through holes formed on the upwind side to make a cross-sectional area smaller than that of the through holes formed on the downwind side. 　最も風上側に形成された前記貫通孔にのみ、前記縮小加工が行なわれていることを特徴とする請求項１に記載の熱交換器。 The heat exchanger according to claim 1, wherein the reduction process is performed only on the through hole formed on the windward side. 　前記縮小加工により前記貫通孔が閉塞されていることを特徴とする請求項１又は２に記載の熱交換器。 The heat exchanger according to claim 1 or 2, wherein the through hole is closed by the reduction process. 　複数の前記配管部材のうち、前記熱媒体が流れる上流側に配置された前記配管部材でのみ、前記縮小加工が行なわれていることを特徴とする請求項１～３の何れか一項に記載の熱交換器。 The said reduction process is performed only with the said piping member arrange | positioned in the upstream which the said heat medium flows among several said piping members, The said reduction process is described in any one of the Claims 1-3 characterized by the above-mentioned. Heat exchanger. 　前記配管部材における風上側の端部を前記第二の方向に沿った両側からプレス加工することにより、前記縮小加工が行なわれていることを特徴とする請求項１～４の何れか一項に記載の熱交換器。 The reduction process is performed by pressing the windward end portion of the piping member from both sides along the second direction. Heat exchanger described. 　前記貫通孔における前記第一の方向に沿った上流側の端部にのみ、前記縮小加工が行なわれていることを特徴とする請求項１～５の何れか一項に記載の熱交換器。 The heat exchanger according to any one of claims 1 to 5, wherein the reduction process is performed only on the upstream end of the through hole along the first direction. 　前記配管部材と前記板部材とで囲まれた領域を、前記第三の方向に空気を流すための通風路とし、前記板部材は、前記第三の方向に沿って前記通風路よりも風上側に延長させた延長部を備えることを特徴とする請求項１～６の何れか一項に記載の熱交換器。 An area surrounded by the piping member and the plate member is a ventilation path for flowing air in the third direction, and the plate member is located on the windward side of the ventilation path along the third direction. A heat exchanger according to any one of the preceding claims, characterized in that it comprises an extension which is extended to
PCT/JP2018/030888 2017-09-19 2018-08-22 Heat exchanger Ceased WO2019058847A1 (en)

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JP2017178915A JP2019052823A (en) 2017-09-19 2017-09-19 Heat exchanger

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012072955A (en) * 2010-09-29 2012-04-12 Mitsubishi Heavy Ind Ltd Heat exchanger
WO2013008464A1 (en) * 2011-07-14 2013-01-17 パナソニック株式会社 Outdoor heat exchanger, and air conditioning device for vehicle

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012072955A (en) * 2010-09-29 2012-04-12 Mitsubishi Heavy Ind Ltd Heat exchanger
WO2013008464A1 (en) * 2011-07-14 2013-01-17 パナソニック株式会社 Outdoor heat exchanger, and air conditioning device for vehicle

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