EP2515065B1 - Échangeur de chaleur - Google Patents

Échangeur de chaleur Download PDF

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Publication number
EP2515065B1
EP2515065B1 EP11163491.1A EP11163491A EP2515065B1 EP 2515065 B1 EP2515065 B1 EP 2515065B1 EP 11163491 A EP11163491 A EP 11163491A EP 2515065 B1 EP2515065 B1 EP 2515065B1
Authority
EP
European Patent Office
Prior art keywords
heat exchanger
fins
tubes
air
meander
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.)
Active
Application number
EP11163491.1A
Other languages
German (de)
English (en)
Other versions
EP2515065A1 (fr
Inventor
Edo B. Wissink
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nederlandse Organisatie voor Toegepast Natuurwetenschappelijk Onderzoek TNO
Original Assignee
Nederlandse Organisatie voor Toegepast Natuurwetenschappelijk Onderzoek TNO
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.)
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Publication date
Application filed by Nederlandse Organisatie voor Toegepast Natuurwetenschappelijk Onderzoek TNO filed Critical Nederlandse Organisatie voor Toegepast Natuurwetenschappelijk Onderzoek TNO
Priority to EP11163491.1A priority Critical patent/EP2515065B1/fr
Publication of EP2515065A1 publication Critical patent/EP2515065A1/fr
Application granted granted Critical
Publication of EP2515065B1 publication Critical patent/EP2515065B1/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
    • 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
    • F28F1/126—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 consisting of zig-zag shaped fins
    • 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

Definitions

  • the invention relates to a heat exchanger, notably a micro-channel heat exchanger.
  • the invention further relates to an air conditioning system.
  • a heat exchanger according to the preamble of claim 1 is known from document JPS58160797 .
  • the known heat exchanger comprises a plurality of parallel fins arranged between the adjacent tubes.
  • the known fins have a substantially uniform depth and may be arranged in a suitable profile, like a zigzag between the adjacent tubes.
  • An inflowing air stream impinging on the fins of the known heat exchanger is intercepted by the whole cross-section of the fin structure arranged between the tubes.
  • a heat exchanger notably a micro-channel heat exchanger with improved operational characteristics.
  • an improved heat exchanger in particular it is an object of the invention to provide a heat exchanger having improved fin structure.
  • the fin structure has a reduced resistance for the inflowing stream of air. It particular, it is found advantageous that the substantially parallel surfaces of the meander structure are shaped as respective openings diverging towards the external face of the heat exchanger conceived to intercept the inflowing stream of air.
  • the depth profile provided in the substantially parallel surfaces of the fins is V-shaped, having the wider portion of the V-shape at an external face of the heat exchanger conceived to receive an inflowing stream of air.
  • the heat exchanger is less sensitive to particle contamination present in the inflowing stream of air, which contributed to the improved operational characteristics of the heat exchanger according to the invention.
  • the heat exchanger having the V-shaped depth profiles in the substantially parallel surfaces of the fins has an increased cooling capacity in condensing or frost accumulating conditions. This may be explained by the fact that in the heat exchanger according to the invention an improved water draining capacity is achieved.
  • the depth profile is provided for a portion of the said meander of canted shape.
  • the invention further relates to an air conditioning device comprising the heat exchanger as is discussed with reference to the foregoing.
  • FIG. 1 presents in a schematic way an embodiment of a known heat exchanger.
  • the known heat exchanger 10 comprises a set of tubes 2 enclosing a set of fins 4, which may propagate according to a meander shape in a meander propagation direction M.
  • the fins 4 in the meander structure form mutually substantially parallel surface 3a, ..., 3n, which are transversely arranged to the tubes 2.
  • the surfaces 3a, ...3n are substantially perpendicular to the tubes 2.
  • the known heat exchanger 10 further comprises a manifold 8 comprising a set of channels 6.
  • the known heat exchanger has a limitation that the spaces between the substantially parallel surfaces 3a, ..., 3n may be polluted with particles present in the inflowing air thereby reducing cooling capacity of the known heat exchanger.
  • FIG. 2 presents in a schematic way an embodiment, based on standard heat exchanger 10, of the heat exchanger 20 according to an aspect of the invention having a cross-sectional dimension X, Y and a depth dimension Z.
  • the heat exchanger 20 comprises a set of tubes 23 enclosing the set of fins having the substantially parallel surface 22a, ..., 22n.
  • the fins and the tubes are connected with the manifold 21 provided with channels 21a, ...21n.
  • the substantially parallel surfaces 22a, ..., 22n are provided with a depth profile 25, which has a wider portion at a face surface 24 of the fins conceived to intercept the stream of the inflowing air 26. It will be appreciated that the depth profile may have different shapes.
  • the depth profile 25 provided in the parallel fins 22a, ..., 22n decrease the resistance for the inflowing air 26.
  • the depth profile 25 ensures that the particles possible present in the inflowing air have a lower probability to deposit on the external face portion 24a and thereby to block the pathway of the inflowing air 26 towards the inner volume of the heat exchanger.
  • the depth and slant profile 25 provided in the parallel fins 22a, ..., 22n increase the water drain capacity .
  • the gravity helps to drains the water so it drips of the point of the canted profile.
  • the heat exchanger of the invention has in practice an increased cooling capacity and an increased robustness with respect to operational malfunction.
  • FIG. 3 presents in a schematic way an embodiment in a still different shape of the heat exchanger 30 according to an aspect of the invention.
  • the cross-sectional view shows the staggered tubes 37 with the parallelogram shaped fins having surfaces 32. Air can enter the heat exchanger with reduced flow resistance due to the V-shaped profile 36 and water drains itself easy from the projecting edge of the tube 37.
  • FIG 4 presents in a schematic way a further embodiment of the heat exchanger 40 according to a still further aspect of the invention.
  • the tubes 42 and the fins 41 are affixed to the manifold 43.
  • the fins 41 are provided with the depth profile (i.e. groove) as is discussed with the reference to the foregoing along the complete length of the meander structure having a suitable plurality of substantially parallel surfaces (not shown for clarity).

Claims (4)

  1. Echangeur de chaleur comprenant un premier ensemble de tubes (23) renfermant un second ensemble d'ailettes de sorte qu'un plan externe est formé par des ailettes entre lesdits tubes qui intercepte un flux d'air entrant, le premier ensemble de tubes (23) coopérant avec un collecteur, dans lequel les ailettes du second ensemble sont sensiblement en forme de méandre ou de forme inclinée comportant un certain nombre de surfaces sensiblement mutuellement parallèles (22a, ..., 22n) dans une direction transversale à la direction de propagation de méandre, dans lequel un profilé de profondeur (25) est prévu dans lesdites surfaces mutuellement parallèles (22a, ..., 22n), caractérisé en ce que le profil de profondeur forme une rainure sur une longueur de la forme de méandre ou inclinée desdites ailettes au niveau du plan extérieur de l'échangeur de chaleur, la rainure (25) ayant une partie plus large formée au niveau du plan extérieur (24) conçue pour intercepter le flux d'air entrant (26) à une résistance à l'écoulement réduite.
  2. Echangeur de chaleur selon la revendication 1, dans lequel le profil de profondeur est en forme de V.
  3. Système de climatisation comprenant un échangeur de chaleur selon l'une quelconque des revendications précédentes.
  4. Utilisation d'un échangeur de chaleur selon l'une quelconque des revendications 1 à 3, avec une application horizontale de l'échangeur de chaleur, le plan d'admission d'air profilé faisant face au sol.
EP11163491.1A 2011-04-21 2011-04-21 Échangeur de chaleur Active EP2515065B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP11163491.1A EP2515065B1 (fr) 2011-04-21 2011-04-21 Échangeur de chaleur

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP11163491.1A EP2515065B1 (fr) 2011-04-21 2011-04-21 Échangeur de chaleur

Publications (2)

Publication Number Publication Date
EP2515065A1 EP2515065A1 (fr) 2012-10-24
EP2515065B1 true EP2515065B1 (fr) 2019-11-06

Family

ID=44358088

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11163491.1A Active EP2515065B1 (fr) 2011-04-21 2011-04-21 Échangeur de chaleur

Country Status (1)

Country Link
EP (1) EP2515065B1 (fr)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58160797A (ja) * 1982-03-19 1983-09-24 Nippon Light Metal Co Ltd 熱交換器
US7281387B2 (en) 2004-04-29 2007-10-16 Carrier Commercial Refrigeration Inc. Foul-resistant condenser using microchannel tubing
US20100006276A1 (en) * 2008-07-11 2010-01-14 Johnson Controls Technology Company Multichannel Heat Exchanger
IN2012DN00867A (fr) * 2009-09-16 2015-07-10 Carrier Corp

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
EP2515065A1 (fr) 2012-10-24

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