WO2000047941A1 - Procede de reduction du volume d'un echangeur de chaleur et echangeur de chaleur fabrique selon ledit procede - Google Patents

Procede de reduction du volume d'un echangeur de chaleur et echangeur de chaleur fabrique selon ledit procede Download PDF

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Publication number
WO2000047941A1
WO2000047941A1 PCT/JP2000/000784 JP0000784W WO0047941A1 WO 2000047941 A1 WO2000047941 A1 WO 2000047941A1 JP 0000784 W JP0000784 W JP 0000784W WO 0047941 A1 WO0047941 A1 WO 0047941A1
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WO
WIPO (PCT)
Prior art keywords
heat exchanger
fin
heat exchange
corrugated
heat
Prior art date
Application number
PCT/JP2000/000784
Other languages
English (en)
Japanese (ja)
Inventor
Kunihiko Nishishita
Original Assignee
Zexel Valeo Climate Control Corporation
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Zexel Valeo Climate Control Corporation filed Critical Zexel Valeo Climate Control Corporation
Publication of WO2000047941A1 publication Critical patent/WO2000047941A1/fr

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Classifications

    • 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
    • F28F13/18—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by applying coatings, e.g. radiation-absorbing, radiation-reflecting; by surface treatment, e.g. polishing
    • 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
    • F28F17/005—Means for draining condensates from heat exchangers, e.g. from evaporators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
    • F28F3/02—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations
    • F28F3/025—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being corrugated, plate-like elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
    • F28F3/02—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations
    • F28F3/025—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being corrugated, plate-like elements
    • F28F3/027—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being corrugated, plate-like elements with openings, e.g. louvered corrugated fins; Assemblies of corrugated strips
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2245/00—Coatings; Surface treatments
    • F28F2245/02—Coatings; Surface treatments hydrophilic

Definitions

  • the present invention relates to a method for reducing a heat exchanger and a heat exchanger manufactured by the method.
  • the present invention relates to a heat exchanger used for an evaporator or the like of a vehicle air conditioner, and more particularly to a method for downsizing while maintaining high performance and a heat exchanger manufactured by the method.
  • the surface of a heat exchanger such as an evaporator is provided with a corrosion-resistant coating for preventing corrosion and a hydrophilic coating for improving drainage.
  • Silica-based and resin-based films are mainly used as the hydrophilic film. Under normal usage conditions, organic components and the like that adhere to the surface are present. Is about 10 to 20 °.
  • corrugated fins used in the heat exchanger have a fin pitch (B in FIG. 5 (a)) of 3.5 mm or more. This is the fin pitch required to ensure drainage between the fins. If the fin pitch is made smaller than this, moisture will accumulate in the ventilation space between the fins, impeding ventilation.
  • an object of the present invention is to provide a method of reducing the size of a heat exchanger that can be reduced while maintaining good drainage and heat exchange efficiency, and a heat exchanger manufactured by the method.
  • the present invention provides a method for reducing the size of a heat exchanger having a corrugated fin for promoting heat exchange in a core portion in which a heat exchange medium and external air exchange heat, the method comprising: To reduce the heat exchange efficiency due to the shortening of the fin width of the corrugated fin when the core width, which is the length, is reduced.
  • the fin pitch of the corrugated fin is reduced to at least the corrugated fin. Is subjected to a superhydrophilic treatment so that the contact angle with water becomes approximately 7 ° or less.
  • the fin pitch is reduced so that the surface area of the fin is increased, and the surface of the fin is reduced.
  • the shape factor for increasing the surface area of the corrugated tofin is the distance B between the tops of the adjacent peaks facing in the same direction.
  • a louver gap which is a distance D of the louver 15 formed by being cut and raised in the plane portion of the Korge fin, There is a fin height that is the distance C between the tops of the hills facing in opposite directions.
  • the inventor has determined that the relationship between the fin pitch, the louver gap, and the fin height and the cooling performance, that is, the heat exchange efficiency, is as shown in FIG. 6, FIG. 7, and FIG. I found that there is.
  • the fin pitch, the louver gap, and the fin height all have a peak at a certain value, and the cooling performance tends to decrease as the distance from the beak increases. This is because the surface area of the fin decreases as the distance from the peak increases, or the surface area increases but the permeability decreases.
  • the fin pitch is in the range of 2.0 to 3.4 mm
  • the clearance between the fins is in the range of 0.15 to 0.8 mm
  • the fin height is in the range of 4 to 9 mm. Things.
  • the corrugated fins formed using the above range are subjected to a superhydrophilic treatment, so that the fins can be made denser and drainage can be ensured.
  • a superhydrophilic treatment it is possible to achieve both high density of fins and drainage, even at a small fin pitch that could not be reached conventionally.
  • This makes it possible to produce a thin corrugated fin with excellent heat exchange efficiency and drainage even if the fin width is reduced, so that the heat exchanger can be made thin while maintaining high performance. Can be achieved.
  • conventional heat exchangers have a core width of around 60 mm mainly in view of heat exchange efficiency, etc., but as described above, excellent heat exchange efficiency and drainage If a thin corrugated fin having flexibility is used, a heat exchanger exhibiting good performance can be provided even if the core width is reduced to a range of 30 to 56 mm.
  • the superhydrophilic treatment can be performed by forming a hydrophilic film containing titanium oxide.
  • Titanium oxide is a photocatalyst that generates a strong oxidizing effect by irradiation of weak ultraviolet light contained in sunlight, fluorescent light, and the like.
  • Hydrophobic components such as organic matter attached to the fin surface are oxidatively decomposed. For this reason, it is possible to obtain a super-hydrophilic state in which the hydrophilicity is maintained for a long time and the contact angle 0 with water (see FIG. 10) is about 7 ° or less.
  • the titanium oxide not only decomposes the above-mentioned hydrophobic components but also oxidizes and decomposes components that emit a bad odor, so that they also have an effect of preventing bad odor and the like.
  • FIG. 1 is a diagram showing a flow of a method for reducing the size of a heat exchanger according to the present invention.
  • FIG. 2 (a) is a front view showing a heat exchanger according to an embodiment of the present invention
  • FIG. 2 (b) is a side view of the heat exchanger.
  • FIG. 3 (a) is a perspective view showing a heat exchanger
  • FIG. 3 (b) is a perspective view showing a tube forming plate constituting a tube element.
  • FIG. 4 is a perspective view showing a corrugated fin used in the heat exchanger.
  • FIG. 5 (a) is a sectional view showing the structure of a corrugated fin
  • FIG. 5 (b) is a sectional view showing the structure of a louver formed on the corrugated fin.
  • Fig. 6 is a graph showing the relationship between the fin pitch of corrugated fins and cooling performance.
  • FIG. 7 is a graph showing the relationship between the louver gap and the cooling performance.
  • FIG. 8 is a graph showing the relationship between the fin height of the corrugated fin and the cooling performance.
  • Fig. 9 (a) is a schematic diagram showing a pen-in heat exchanger. (b) is a perspective view showing a separate tank type heat exchanger.
  • FIG. 10 is a diagram showing a contact angle with water.
  • the heat exchanger 1 used in this embodiment shown in FIGS. 2 and 3 is formed of an aluminum alloy and is used for evaporators and the like of vehicle air conditioners, through which a refrigerant flows.
  • a plurality of tube elements 3 each having a flow path formed therein and a plurality of corrugated fins 2 for promoting heat exchange between a refrigerant and air are alternately stacked.
  • the tube element 3 is configured by joining two tube forming plates 10 in which the flow path forming portions 13 are bulged as shown in FIG. 3 so that the bulging portions face each other. Is done. Further, a first communication hole 11 and a second communication hole 12 are formed at a lower end portion of the tube forming plate 10, and a folded wall is formed at a substantially central portion of the tube forming plate 10. A part 14 is formed. As a result, the refrigerant flow path formed by the flow path forming portion 13 becomes substantially U-shaped, and the refrigerant flowing from the first communication hole 11 flows at the upper end of the folded wall portion 14 as shown by the arrow in the drawing. It turns back and flows out from the second communication hole 12.
  • the first and second communication holes 11 and 12 are connected to the first and second communication holes 11 and 12 of the adjacent tube element 3 to form a tank portion 4.
  • the tank portion 4 has a refrigerant inlet 5 for guiding the refrigerant from the outside into the heat exchanger 1 and a refrigerant outlet 6 for allowing the refrigerant flowing inside the heat exchanger 1 to flow to the outside.
  • two tube elements 3, 3 located near the center of the plurality of tube elements 2, As shown in FIG. 3 (a), the refrigerant flowing from the refrigerant inlet 5 makes two round trips (4) inside the heat exchanger 1 due to the fact that the first communication holes 11 of FIG. After passing, the refrigerant flows out of the refrigerant outlet 6.
  • the corrugated fin 2 shown in FIG. 4 is formed in a meandering shape in order to increase the surface area, and a louver 15 is formed by cutting and raising a plane portion.
  • the geometric elements for changing the surface area of the corrugated fin 2 include a fin bite B, a fin height C, and a clearance D as shown in FIGS. 5 (a) and 5 (b).
  • Fin pitch B is the distance between the tops of the adjacent peaks facing in the same direction
  • Fin height C is the distance between the tops of the peaks facing in opposite directions
  • the louver gap is the distance between adjacent louvers 15.
  • the surface of the heat exchanger 1 containing the corrugated fins 2 is subjected to a superhydrophilic treatment to ensure the drainage of the densified corrugated fins 2.
  • the core width A of the heat exchanger 1 can be reduced while maintaining high heat exchange efficiency and good drainage.
  • the corrugated fin 2 according to this embodiment has a fin pitch B formed in a range of 2.0 to 3.4 mm capable of exhibiting 70 to 80% or more performance, as shown in FIG.
  • the louver gap D is formed in a range of 0.15 to 0.8 mm (see FIG. 7), and the fin height C is formed in a range of 4 to 9 mm (see FIG. 8). .
  • the core width A of the heat exchanger 1 can be reduced to 30 to 56 mm while maintaining the heat exchange efficiency and drainage.
  • the superhydrophilic treatment is performed by forming a hydrophilic film composed of a mixture of a water retention material such as silica and titanium oxide on the surface of the corrugated fin 2.
  • Titanium oxide is a photocatalyst that generates a strong oxidizing effect when irradiated with weak ultraviolet rays contained in sunlight, fluorescent light, and the like, and oxidizes and decomposes organic dirt such as oil attached to the film surface. Therefore, it is possible to obtain a super-hydrophilic state in which the hydrophilicity is maintained for a long time and the contact angle with water (see FIG. 10) is about 7 ° or less. Further, the titanium oxide not only decomposes the hydrophobic component, but also oxidizes and decomposes the component that emits offensive odor, so that the effect of preventing odor can be obtained at the same time.
  • the hydrophilic film may be formed on the chromium-containing corrosion-resistant film. According to this, corrosion of the base material of the entire heat exchanger 1 including the corrugated fins 2 can be prevented.
  • the method of reducing the size of the heat exchanger according to the present invention is not limited to the laminate type heat exchanger as shown in FIGS. 2 and 3, but as shown in FIG. 9 (a).
  • a simple serpentine type or a separate tank type as shown in Fig. 9 (b) can be used.
  • Industrial applicability As described above, according to the present invention, the density of the corrugated fins can be increased without impairing the drainage properties, so that a high-performance, thin-width heat exchanger can be manufactured.

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

Abstract

L'invention porte sur un procédé de réduction du volume d'un échangeur de chaleur permettant la réduction de la taille d'un échangeur alors que des bonnes capacités d'évacuation et d'échange de chaleur sont conservées, ainsi que sur un échangeur de chaleur fabriqué selon ledit procédé. Le procédé de réduction de la taille d'un échangeur de chaleur possédant des ailettes ondulées favorisant l'échange de chaleur au niveau d'une partie centrale dans laquelle l'échange de chaleur est assuré entre un milieu caloporteur et l'air extérieur, consiste à réduire le pas des ailettes ondulées, de sorte que la diminution de l'efficacité de l'échange de chaleur induit par la réduction de la largeur des ailettes ondulées soit compensé, lorsque la largeur du noyau qui correspond à la longueur de la partie centrale en direction des évent est réduite ; et à appliquer un traitement super-hydrophile, de sorte que l'angle de contact avec l'eau soit réduit à environ 7° ou moins, au moins sur la surface des ailettes ondulées.
PCT/JP2000/000784 1999-02-12 2000-02-14 Procede de reduction du volume d'un echangeur de chaleur et echangeur de chaleur fabrique selon ledit procede WO2000047941A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP11034433A JP2000234892A (ja) 1999-02-12 1999-02-12 熱交換器の縮小方法及びこの方法により製造される熱交換器
JP11/34433 1999-02-12

Publications (1)

Publication Number Publication Date
WO2000047941A1 true WO2000047941A1 (fr) 2000-08-17

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PCT/JP2000/000784 WO2000047941A1 (fr) 1999-02-12 2000-02-14 Procede de reduction du volume d'un echangeur de chaleur et echangeur de chaleur fabrique selon ledit procede

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WO (1) WO2000047941A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20020061937A (ko) * 2001-01-19 2002-07-25 한국델파이주식회사 자동차용 증발기의 센터
JP3775302B2 (ja) 2002-01-23 2006-05-17 株式会社デンソー 熱交換器
JP2011185589A (ja) * 2010-02-09 2011-09-22 Sumitomo Light Metal Ind Ltd 空気調和機用サーペンタイン熱交換器
JP6002583B2 (ja) * 2013-01-08 2016-10-05 株式会社ケーヒン・サーマル・テクノロジー エバポレータ
JP6997722B2 (ja) * 2016-12-02 2022-01-18 三菱電機株式会社 熱交換器および空気調和装置

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5913078A (ja) * 1982-07-14 1984-01-23 Nippon Radiator Co Ltd アルミニウム蒸発器の表面処理方法
JPS6012088U (ja) * 1983-06-30 1985-01-26 カルソニックカンセイ株式会社 熱交換器
JPH01291097A (ja) * 1988-05-18 1989-11-22 Showa Alum Corp 熱交換器
JPH0219390B2 (fr) * 1981-04-01 1990-05-01 Diesel Kiki Co
JPH09229585A (ja) * 1995-12-22 1997-09-05 Toto Ltd 熱交換器及び熱交換器の運転方法
JPH09314041A (ja) * 1996-05-30 1997-12-09 Toto Ltd 気泡付着防止器材及びその製造方法

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0219390B2 (fr) * 1981-04-01 1990-05-01 Diesel Kiki Co
JPS5913078A (ja) * 1982-07-14 1984-01-23 Nippon Radiator Co Ltd アルミニウム蒸発器の表面処理方法
JPS6012088U (ja) * 1983-06-30 1985-01-26 カルソニックカンセイ株式会社 熱交換器
JPH01291097A (ja) * 1988-05-18 1989-11-22 Showa Alum Corp 熱交換器
JPH09229585A (ja) * 1995-12-22 1997-09-05 Toto Ltd 熱交換器及び熱交換器の運転方法
JPH09314041A (ja) * 1996-05-30 1997-12-09 Toto Ltd 気泡付着防止器材及びその製造方法

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