EP3749562B1 - Mélangeur et système de climatisation d'un véhicule ferroviaire - Google Patents

Mélangeur et système de climatisation d'un véhicule ferroviaire Download PDF

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Publication number
EP3749562B1
EP3749562B1 EP19707297.8A EP19707297A EP3749562B1 EP 3749562 B1 EP3749562 B1 EP 3749562B1 EP 19707297 A EP19707297 A EP 19707297A EP 3749562 B1 EP3749562 B1 EP 3749562B1
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EP
European Patent Office
Prior art keywords
mixer
air
inlet
central area
fresh air
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
EP19707297.8A
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German (de)
English (en)
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EP3749562A1 (fr
Inventor
Thomas PLINNINGER
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.)
Siemens Mobility GmbH
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Siemens Mobility GmbH
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Publication of EP3749562A1 publication Critical patent/EP3749562A1/fr
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61D—BODY DETAILS OR KINDS OF RAILWAY VEHICLES
    • B61D27/00—Heating, cooling, ventilating, or air-conditioning
    • B61D27/0018—Air-conditioning means, i.e. combining at least two of the following ways of treating or supplying air, namely heating, cooling or ventilating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61D—BODY DETAILS OR KINDS OF RAILWAY VEHICLES
    • B61D27/00—Heating, cooling, ventilating, or air-conditioning

Definitions

  • the invention relates to a mixer and an arrangement for air conditioning a rail vehicle.
  • Fresh air FL is supplied to a mixer M via a first input and circulating air UL via a second input.
  • the circulating air UL comes from an interior IR of the rail vehicle and is fed to the mixer M with the aid of a duct system KS2.
  • the fresh air FL is obtained from the external environment of the rail vehicle and is also fed to the mixer M.
  • the supplied circulating air UL is mixed with the supplied fresh air FL by the mixer M and a so-called supply air ZL is generated from this.
  • the supply air ZL is fed via an output of the mixer M to an air conditioning unit KLG and to a supply fan ZUL downstream of the air conditioning unit KLG.
  • the supplied supply air ZL is air-conditioned or its temperature regulated by the air-conditioning unit KLG. With the aid of the downstream supply fan ZUL, the air-conditioned supply air ZL is supplied to the interior IR of the rail vehicle via a duct system KS1.
  • Part of the conditioned air returns to the mixer M via the duct system KS2 described above as circulating air UL from the interior IR of the rail vehicle.
  • the capacity of the supply fan ZUL may be overwhelmed, so that its maintenance requirements increase or its service life decreases.
  • An additional UML circulating fan with circulating air intake is connected upstream of the mixer M, so that pressure losses on the circulating air side are compensated for by the powerful, additional circulating air intake.
  • fans that are additionally required or whose capacity is increased increase the power consumption of the resulting overall system and the costs of the resulting air-conditioning arrangement.
  • the arrangement according to the invention addresses, as the core item, a mixer for use in an air conditioning arrangement of a rail vehicle.
  • the mixer has a first input, a second input, an output, and a middle section located between the two inputs and the output.
  • the first entrance is connected to a fresh air supply, so that fresh air reaches the central area via the first entrance.
  • the second inlet is connected to a circulating air supply, so that circulating air enters the central area via the second inlet.
  • supply air is generated from the supplied circulating air and from the supplied fresh air by mixing, which air reaches the outlet of the mixer.
  • the middle section of the mixer is connected to the first input via an opening.
  • the opening forms a transition area between the entrance and the middle area, so that the supplied fresh air is guided from the first entrance via the transition area to the middle area.
  • the transition area includes a profile with a cross-section shaped like an aerofoil.
  • the profile is arranged in the transition area in such a way that the supplied fresh air generates a negative pressure along the transition area, through which the circulating air is drawn in more strongly into the middle area of the mixer.
  • the present invention is based on an efficient and redesigned introduction of fresh air into the mixer.
  • the incoming fresh air is fed into the mixer via a profile with an aerofoil cross-section, so that a Coanda effect is created along the profile.
  • Coanda effect describes the tendency of a gas flow to run along a convex surface of the airfoil-shaped profile (instead of separating from it) and to move on accelerated in an original flow direction.
  • the interaction of the fresh air and circulating air flowing along the wing profile creates a negative pressure on the circulating air side of the mixer, through which the circulating air then flows is increasingly sucked into the interior of the mixer (an injector principle is therefore advantageously used).
  • a fresh air fan is connected upstream of the first input of the mixer.
  • the fresh air fan draws in fresh air, pressurizes it and supplies the pressurized fresh air to the mixer via the first inlet of the mixer.
  • the fresh air fan is designed as a side channel compressor.
  • a side channel blower With a low volume flow, a side channel blower has a high pressure gain and thus a steep characteristic curve.
  • Such a side channel compressor easily overcomes pressure losses and efficiently conveys the fresh air into the mixer in order to additionally support its circulating air intake.
  • the fresh air is introduced into the mixer in an aerodynamically efficient manner.
  • a cost-effective and low-effort circulating air intake is implemented in the mixer, with which any pressure losses in an air-conditioning arrangement can be compensated.
  • the present invention brings advantages in terms of the overall efficiency of the air-conditioning arrangement, since overall less electrical power is required for its operation.
  • the present invention brings advantages in terms of the required installation space, since components that were previously required are no longer required or can be made smaller in size.
  • the present invention also has advantages in terms of acoustics, since the mixer according to the invention has no moving components that cause noise.
  • the present invention uses a fresh air fan to supply fresh air at an increased pressure to the mixer on the input side. This supports the conveyance of the circulating air into the mixer. As a result, the circulating air is increasingly sucked in through the mixer.
  • the mixer M11 has a first input E11, a second input E12 and an output A11.
  • the mixer M11 also has a cylindrical central area B11.
  • the mixer M11 is supplied with fresh air FL via the first input E11 and circulating air UL via the second input E12.
  • the fresh air FL is mixed with the circulating air UL and an inlet air ZL is generated from this.
  • the first inlet E11 is designed as a tube which is arranged radially circumferentially on an outer side AS11 of the mixer M11 and correspondingly opens radially circumferentially in the direction of the middle region B11 into the interior of the mixer M11.
  • This opening OF11 thus forms a peripheral transition area UB11, which is arranged between the entrance E11 and the cylindrical central area B11.
  • the circumferential transition area UB11 includes a profile PR11, which has an airfoil-shaped cross section, which is described in more detail below.
  • FIG 2 shows with reference to FIG 1 a detail of the mixer M11 according to the invention in a sectional view.
  • the airfoil-shaped cross section of the profile PR11 has a concave, i.e. inwardly curved, surface OB11 in the direction of the supplied fresh air FL or in the direction of the first inlet E11.
  • the airfoil-shaped cross section of the profile PR11 has a convex, ie outwardly curved, surface OB12 in the direction of the supplied circulating air UL or in the direction of the cylindrical middle region B11.
  • the outwardly curved surface OB12 of the profile PR11 is arranged opposite the opening OF11 and has a (small) air gap LS11 as a distance from it.
  • the transition area UB11 thus has the functionality of an injector:
  • the supplied fresh air FL causes a negative pressure along the transition area UB11, via which the circulating air UL is sucked into the mixer M11 or in its central area B11 to a greater extent.
  • FIG 3 shows with reference to FIG 1 and FIG 2 an advantageous extension of the mixer M11 according to the invention.
  • a fresh air fan FRL is connected upstream of the first input E11 of the mixer M11.
  • the fresh air fan draws in fresh air FL, applies pressure to it and feeds the pressurized fresh air FL to the mixer M11 via the first input E11 of the mixer M11.
  • the fresh air fan FRL is designed in particular as a side channel compressor. With a low volume flow, a side channel blower has a high pressure gain and thus a steep characteristic curve.
  • This side channel compressor easily overcomes pressure losses and efficiently conveys fresh air FL into the mixer M11 in order to additionally support its circulating air intake.
  • FIG 4 shows an air conditioning scheme of a rail vehicle using the mixer M11 according to the invention.
  • the mixer M11 is supplied with fresh air FL via a first input and circulating air UL via a second input.
  • the circulating air In this case, UL comes from an interior IR of the rail vehicle and is fed to the mixer M11 with the aid of a channel system KS2.
  • the fresh air FL is obtained from the external environment of the rail vehicle and is also supplied to the mixer M11.
  • the supplied circulating air UL is mixed with the supplied fresh air FL by the mixer M11 and a so-called supply air ZL is generated therefrom.
  • the supply air ZL is fed via an output of the mixer M11 to an air conditioning device KLG and to a supply fan ZUL downstream of the air conditioning device KLG.
  • the supplied supply air ZL is air-conditioned or its temperature regulated by the air-conditioning unit KLG. With the aid of the downstream supply fan ZUL, the conditioned supply air ZL is supplied to the interior IR of the rail vehicle via a duct system KS1.
  • Part of the conditioned air returns to the mixer M via the duct system KS2 described above as circulating air UL from the interior IR of the rail vehicle.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Air-Conditioning For Vehicles (AREA)
  • Jet Pumps And Other Pumps (AREA)

Claims (5)

  1. Mélangeur destiné à être utilisé avec un système de climatisation d'un véhicule ferroviaire,
    - dans lequel le mélangeur (M11) présente une première entrée (E11), une seconde entrée (E12), une sortie (A11) et une région centrale (B11) agencée entre les deux entrées (E11, E12) et la sortie (A11),
    - dans lequel la première entrée (Ell) peut être reliée à une alimentation en air frais de sorte que de l'air frais (FL) parvient dans la région centrale (B11) en passant par la première entrée (E11),
    - dans lequel la seconde entrée (E12) peut être reliée à une alimentation en air recirculé de sorte que de l'air recirculé (UL) parvient dans la région centrale (B11) en passant par la seconde entrée (E12),
    - dans lequel de l'air d'alimentation (ZL) parvenant au niveau de la sortie (A11) du mélangeur est généré par mélange dans la région centrale (B11) à partir de l'air recirculé (UL) et de l'air frais (FL) acheminés,
    - dans lequel la région centrale (B11) du mélangeur (M11) est reliée à la première entrée (Ell) par une ouverture (OF11) et l'ouverture (OF11) forme une région de transition (UB11) entre l'entrée (Ell) et la région centrale (B11) de sorte que l'air frais acheminé est guidé de la première entrée (Ell) vers la région centrale (B11) en passant par la région de transition (UB11),
    - dans lequel la région de transition (UB11) inclut un profil (PR11) présentant une section transversale en forme d'aile,
    - dans lequel le profil (PR11) est agencé dans la région de transition (UB11) de telle manière que l'air frais (FL) acheminé génère le long de la région de transition (UB11) une dépression grâce à laquelle l'air recirculé (UL) est aspiré de manière renforcée dans la région centrale (B11) du mélangeur (M11), caractérisé en ce que :
    - la région centrale (B11) du mélangeur (M11) est de forme cylindrique,
    - la première entrée (Ell) du mélangeur (M11) est conçue sous forme de tube,
    - le tube est agencé de manière radialement circonférentielle au niveau d'un côté extérieur (AS11) du mélangeur (M11),
    - le tube présente, de manière radialement circonférentielle en direction de la région centrale (B11) et en direction de l'intérieur du mélangeur (M11), l'ouverture (OF11) qui forme la région de transition (UB11) circonférentielle agencée entre l'entrée (Ell) et la région centrale (B11) cylindrique.
  2. Mélangeur selon la revendication 1,
    - dans lequel la section transversale en forme d'aile du profil (PR11) présente, en direction de l'air frais (FL) acheminé resp. en direction de la première entrée (E11), une surface (OB11) incurvée vers l'intérieur,
    - dans lequel la section transversale en forme d'aile du profil (PR11) présente, en direction de l'air recirculé (UL) acheminé resp. en direction de la région centrale (B11) cylindrique, une surface (OB12) incurvée vers l'extérieur,
    - dans lequel la surface (OB12) incurvée vers l'extérieur du profil (PR11) est agencée vis-à-vis de l'ouverture (OF11) et présente par rapport à celle-ci un entrefer (LS11) sous la forme d'un espacement.
  3. Mélangeur selon la revendication 1, dans lequel une soufflante d'air frais (FRL) est placée en amont de la première entrée (Ell) du mélangeur (M11) de sorte que de l'air frais (FL) aspiré grâce à la soufflante d'air frais (FRL) parvient au niveau de la première entrée (Ell) du mélangeur (M11) en étant soumis à une pression.
  4. Mélangeur selon la revendication 3, dans lequel la soufflante d'air frais (FRL) est réalisée sous la forme d'un compresseur à canal latéral.
  5. Système de climatisation d'un véhicule ferroviaire avec un mélangeur (M11) réalisé selon l'une quelconque des revendications 1 à 4,
    - dans lequel le mélangeur est conçu afin de générer de l'air d'alimentation (ZL) à partir d'air frais (FL) acheminé jusqu'au mélangeur (M111) en passant par une première entrée et d'air recirculé (UL) acheminé jusqu'au mélangeur (M111) en passant par une seconde entrée,
    - dans lequel le mélangeur (M11) est relié côté sortie à un climatiseur (KLG) de sorte que l'air d'alimentation est guidé vers le climatiseur en vue d'une climatisation et d'un ajustement de température,
    - dans lequel une soufflante d'alimentation (ZUL), par l'intermédiaire de laquelle l'air d'alimentation climatisé parvient dans un espace intérieur (IR) du véhicule ferroviaire en passant par un système de canalisation (KS2), est placée en aval du climatiseur (KLG), et
    - dans lequel l'espace intérieur (IR) du véhicule ferroviaire est relié à une entrée du mélangeur (M11) par l'intermédiaire d'un système de canalisation (KS2) de sorte qu'au moins une partie de l'air d'alimentation climatisé provenant de l'espace intérieur (IR) parvient sous forme d'air recirculé à la seconde entrée du mélangeur (M11) en passant par un système de canalisation (KS2).
EP19707297.8A 2018-03-15 2019-02-14 Mélangeur et système de climatisation d'un véhicule ferroviaire Active EP3749562B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102018203986 2018-03-15
PCT/EP2019/053724 WO2019174848A1 (fr) 2018-03-15 2019-02-14 Mélangeur et système de climatisation d'un véhicule ferroviaire

Publications (2)

Publication Number Publication Date
EP3749562A1 EP3749562A1 (fr) 2020-12-16
EP3749562B1 true EP3749562B1 (fr) 2022-03-30

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Application Number Title Priority Date Filing Date
EP19707297.8A Active EP3749562B1 (fr) 2018-03-15 2019-02-14 Mélangeur et système de climatisation d'un véhicule ferroviaire

Country Status (6)

Country Link
US (1) US11414103B2 (fr)
EP (1) EP3749562B1 (fr)
CN (1) CN111867915B (fr)
ES (1) ES2910408T3 (fr)
RU (1) RU2742916C1 (fr)
WO (1) WO2019174848A1 (fr)

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DE102006017004B3 (de) * 2006-04-11 2007-10-25 Airbus Deutschland Gmbh Vorrichtung zur Vermischung von Frischluft und Heizluft sowie Verwendung derselben in einem Belüftungssystem eines Flugzeuges
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Also Published As

Publication number Publication date
RU2742916C1 (ru) 2021-02-11
WO2019174848A1 (fr) 2019-09-19
CN111867915B (zh) 2023-01-20
US11414103B2 (en) 2022-08-16
CN111867915A (zh) 2020-10-30
US20200406939A1 (en) 2020-12-31
ES2910408T3 (es) 2022-05-12
EP3749562A1 (fr) 2020-12-16

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