DD239570A1

DD239570A1 - AIR INTAKE FOR AIR HEATING AND AIR CONDITIONING IN RAIL VEHICLES

Info

Publication number: DD239570A1
Application number: DD27898885A
Authority: DD
Inventors: Juergen Schumann; Rainer Kochte
Original assignee: Bautzen Waggonbau Veb
Priority date: 1985-07-26
Filing date: 1985-07-26
Publication date: 1986-10-01

Abstract

Die Erfindung betrifft eine Umlaufansaugung fuer Luftheizungs- und Klimaanlagen in Schienenfahrzeugen welche in, der Personenbefoerderung dienenden, Fahrzeugen Anwendung finden kann. Ziel und Aufgabe der Erfindung bestehen in der Schaffung einer Umluftansaugung der eingangs beschriebenen Art, die keine konstruktiv bedingten Aufbauten an der Seitenwand erfordert und die Moeglichkeit der Schallabsorbtion der aus dem Unterfluraggregat dringenden Lueftergeraeusche bei geringsten Druckverlusten bietet. Diese Aufgabe wird geloest durch die Verwendung von mit schallabsorbierender Isolation ausgekleideten Ansaughauben sowie den Einsatz eines speziellen Schalldaemmkanals.The invention relates to a Umlaufansaugung for air heating and air conditioning systems in rail vehicles which can be found in serving the Personenbefoerderung, vehicles application. The aim and object of the invention are to provide a Umluftansaugung of the type described above, which does not require structurally related structures on the side wall and offers the possibility of Schallabsorbtion urgent from the underfloor unit fan noise at minimum pressure drops. This task is solved by the use of suction hoods lined with sound absorbing insulation as well as the use of a special sound damper channel.

Description

Die Erfindung soll nachfolgend an einem Ausführungsbeispiel näher erläutert werden. Die zugehörigen Zeichnungen zeigenThe invention will be explained in more detail below using an exemplary embodiment. The accompanying drawings show

Fig. 1: den Querschnitt durch die erfindungsgemäße Umluftansaugung Fig. 2: den Längsschnitt durch die erfindungsgemäße Umluftansaugung Fig. 3: den Querschnitt durch eine Ansaughaube1: the cross section through the recirculation air intake according to the invention FIG. 2: the longitudinal section through the recirculation air intake according to the invention FIG. 3: the cross section through an intake hood

Aus den Zeichnungen ist der Aufbau einer erfindungsgemäßen Umluftansaugung eines Großraumwagens ersichtlich, die aus den unter zwei Sitzen auf dem Fußboden montierten Absaughauben 1, unter denen sich die zum Sammelkanal 3 führenden Luftkanäle 2 befinden und des sich anschließenden im Querträgerbereich des Untergestells angeordneten Schalldämmkanals mit den Schalldämmkulissen 7 besteht.The construction of a Umluftansaugung according to the invention of a large-capacity car is apparent from the mounted under two seats on the floor suction hoods 1, below which are leading to the collecting duct 3 air ducts 2 and the adjoining arranged in the cross member area of the undercarriage sound insulation channel with the Schalldämmkulissen 7 exists.

Die Umluft gelangt aus dem Fahrgastraum durch Lamellengitter in eine oder mehrere Absaughauben 1. Die Absaughauben sind unter den Sitzen auf der den Lufteintrittsstutzen des im Untergestell des Waggons befestigten Luftaufbereitungsaggregaten 6 gegenüberliegenden Wagenseite angeordent. Die Lamellengitter und ein an der Decke der Absaughaube 1 befindlicher Leitkegel 8 gewährleisten eine gute Luftströmung innerhalb der Absaughaube. Die Decke der Absaughaube 1 mit dem Leitkegel 8 und die Seitenwände des Haubenunterteils sind mit schallabsorbierendem Material 10 ausgekleidet, so daß aus dem Untergestell dringende Geräusche des oberen Frequenzbereiches gemindert werden.The circulating air passes from the passenger compartment through louvred grille in one or more suction hoods 1. The suction hoods are angeordent under the seats on the air inlet nozzle of the attached in the undercarriage of the wagon air treatment units 6 opposite side of the car. The louvred grille and a cones 8 located on the ceiling of the exhaust hood 1 ensure good air flow within the exhaust hood. The ceiling of the suction hood 1 with the traffic cone 8 and the side walls of the hood base are lined with sound-absorbing material 10, so that urgent noise of the upper frequency range can be reduced from the base.

Die Anwendung von mehreren Absaughauben erlaubt bei größeren Luftmengen die Luftgeschwindigkeit im Gitterbereich gering zu halten, und damit Zugerscheinungen im Fußbereich der Fahrgäste und Luftgeräusche am Gitter zu vermeiden. Gleichzeitig werden die Druckverluste innerhalb der Absaughauben herabgesetzt. Nach dem Passieren der Absaughauben gelangt die Umluft durch entsprechende Fußbodenöffnungen 9 und anschließende Luftkanäle 2 zum außen wärmeisolierten Sammelkanal 3.The use of multiple suction hoods allows for larger amounts of air to keep the air speed in the grid area low, and thus to avoid drafts in the foot of the passengers and air noise on the grid. At the same time, the pressure losses within the suction hoods are reduced. After passing through the suction hoods, the circulating air passes through corresponding floor openings 9 and subsequent air ducts 2 to the externally thermally insulated collecting duct 3.

An diesen schließt sich der im Querträgerbereich des Untergestells angeordnete Schalldämmkanal 4 an, welcher quer zur Wagenlängsachse liegend die Verbindung zur über den Lufteintrittsstutzen des Luftaufbereitungsaggregates befindlichen !Mischkammer 5 realisiert. ^: These are adjoined by the sound-absorbing channel 4 arranged in the cross-member region of the underframe, which transversally to the longitudinal axis of the carriage establishes the connection to the mixing chamber 5 located above the air inlet connection of the air treatment unit. ^:

Zu der Mischkammer 5, die auf den Lufteintrittsstutzen des Luftaufbereitungsaggregates 6 befestigt ist, befindet sich eine Klappe, die die jeweiligen Luftströme (Frisch-, Um- oder Mischluftbetrieb) einstellt. Die Frischluft strömt hier aus dem sich darüber befindlichen Frischluftkanal, der an das in der Seitenwand angeordnete Frischluftgitter anschließt. Der Schalldämmkanal 4 ist doppelwandig ausgeführt, wobei zwischen dem äußeren Mantelblech und der aus gelochtem Siebblech bestehenden Innenverkleidung schallabsorbierendes Material 10 eingebracht ist. Zur Erhöhung der Wirksamkeit der Schalldämmung sind längs im Schalldämmkanal aus Siebblechen gefertigte mit Schalldämm-Material gefüllte Kulissen 7 vorgesehen, die die Querschnittsbreite des Kanals unterteilen. Die zwischen Außen- und Innenverkleidung vorhandene schallabsorbierende Materialschicht 10 dient außer der Dämmung der vom Lüfter des Luftaufbereitungsaggregates erzeugten Geräusche auch der Senkung der eindringenden Fahrgeräusche und als Isolation gegen einen den Wirkungsgrad der Luftheizungs- oder Klimaanlage verschlechternden Wärmeaustausch.To the mixing chamber 5, which is attached to the air inlet nozzle of the air treatment unit 6, there is a flap which adjusts the respective air flows (fresh, re-circulating or mixed air operation). The fresh air flows out of the fresh air duct above it, which adjoins the fresh air grille arranged in the side wall. The sound-absorbing channel 4 is double-walled, with sound-absorbing material 10 being introduced between the outer jacket plate and the inner panel consisting of perforated screen plate. To increase the effectiveness of the sound insulation longitudinally produced in the sound absorption channel of screen plates provided with sound insulation material scenes 7 are provided which divide the cross-sectional width of the channel. The existing between the outer and inner lining sound-absorbing material layer 10 is used in addition to the insulation of the fan of the air treatment unit generated noise and the reduction of penetrating driving noise and insulation against a deterioration of the efficiency of the air heating or air conditioning heat exchange.

Claims

Invention claim:

Umluftansaugung for air heating and air conditioning systems in rail vehicles, with underfloor arranged air treatment unit, characterized in that on the floor of a rail vehicle suction hoods, which are lined with sound-absorbing insulation and provided with down-facing louvred grids and louvers, are mounted in the port per intake hood Air duct is arranged, which is followed by a collecting channel, which in turn located in a, located in the cross member area of the car undercarriage, sound insulation channel, which is lined with sound-absorbing insulation, opens, which is followed by the Luftaufbereitungsaggregai.

For this 3 pages drawings

Field of application of the invention

The invention relates to a Umluftansaugung for air heating and air conditioning systems in rail vehicles, which may find application in the design and production of passenger cars, traction vehicles and other passenger transport applications.

Characteristic of the known technical solutions

In the previously known technical solutions with underfloor arranged air treatment units, the recirculation was sucked for reprocessing through a grid, which integrated in a suction box with flap to adjust the proportional air flows (fresh air, circulating air) below the window sill by its construction on the side wall, limiting the aisle width , was arranged. Such a restriction of the available space through the Umluftansaugung is not favorable in compartment cars with side passage, but still reasonable.

In addition, the arrangement of the Umluftansaugung at this point of the car has the great shortcoming that the fan noise from the air treatment unit on the shortest route get into the interior and due to the short air gap hardly effective sound-absorbing measures can be taken. Another disadvantage of this type of Umluftansaugung is the outside of the same location of the side wall provided arrangement of the fresh air grille through which driving noise on the Stellklappenraum and then penetrate through the Umluftgitter almost undamped in the car. Again, effective sound insulation measures are not applicable and compliance with prescribed noise parameters can not be guaranteed. For large capacity cars, the spatial structure of the recirculation air intake at this point of the side wall is also still disadvantageous because the space for the arrangement of the seats is limited and drafts for the passengers sitting in front of the intake, are inevitable. Add to that the extraordinary noise pollution. For this reason, the arrangement of the Umluftansaugung in the manner described above in general, and in those with increased comfort conditions in particular can not be used in large capacity cars.

Object of the invention

The object of the invention is to provide a Umluftansaugung for air heating and air conditioning systems in rail vehicles with underfloor arranged air treatment unit, which requires no design-related structures on the side wall and thus avoids a restriction of the passenger compartment width.

Explanation of the essence of the invention

The invention has for its object to provide a Umluftansaugung, as set forth in more detail under the aim of the invention, which offers the possibility of Schallabsorbtion from the 'underfloor unit urgent fan noise and keeps the pressure losses as low as possible.

According to the invention this object is achieved in that suction hoods are mounted on the floor of a rail vehicle. These suction hoods are lined with sound-absorbing insulation and provided with down-facing louvred grids and louvers. Following each suction hood, an air duct is arranged, to which a collecting duct is connected. This collection channel opens into a, located in the cross member area of the car frame, sound insulation channel, which is lined with sound-absorbing insulation. At this soundproofing the air conditioning unit connects.