WO2001066946A1

WO2001066946A1 - Sound absorber for compressors

Info

Publication number: WO2001066946A1
Application number: PCT/EP2001/002578
Authority: WO
Inventors: Wolfgang Riese
Original assignee: Wolfgang Riese
Priority date: 2000-03-07
Filing date: 2001-03-07
Publication date: 2001-09-13
Also published as: PL357436A1; DE10011023A1; HRP20020726A2; CZ20022795A3; EP1261805A1

Abstract

The invention relates to a sound absorber for compressors. The inventive sound absorber is particularly suitable for being directly placed upon the pressure outlet of a screw compressor. Said sound absorber has a housing (1) which has a flat box-type design. The housing comprises an inlet (9) in the bottom wall (3) and an outlet (11) in the cover wall (5). A dividing wall (15) that extends between the bottom wall (3) and the cover wall (5) divides the housing into a lower inlet chamber (17) and an upper outlet chamber (19). A passage area (21) that is laterally offset in relation to the inlet (9) and the outlet (11) and pertains to the dividing wall (15) has numerous small openings. The sum of the average cross-sections of the openings is equal to or greater than the opening cross-section of the inlet (9). The compressed air flows in parallel in relation to the dividing wall (15) and through the flat inlet and outlet chambers when flowing from the inlet (9) to the outlet (11). Sound is thus effectively absorbed by means of the fine distribution of the air flow through the openings of the passage area pertaining to the dividing wall, whereby no kind of sound absorbing or absorbing material is not arranged in the sound absorber.

Description

Silencers for compressors

The invention relates to a muffler for connection to the pressure outlet of a compressor, as specified in the preamble of claim 1. The muffler according to the invention is preferably, but not exclusively, intended for use with screw compressors, namely both stationary screw compressors and, in particular, screw compressors which are mounted on silo vehicles.

Screw compressors for compressing gases or for producing compressed air are used in a wide variety of fields, e.g. for the compressed air supply of pneumatic tools, for pneumatic requirements and even for the pneumatic starting of jet engines of aircraft. Silo vehicles are an important area of application for the transport of dusty or free-flowing bulk goods. A screw compressor mounted on the vehicle generates the compressed air required to loosen the bulk material in the silo and to discharge the bulk material pneumatically.

A problem with this and other uses of screw compressors is their very high noise level, the noise components generated in the high-frequency range in particular being perceived as being particularly annoying and can cause health damage. Acoustic damping measures are therefore necessary both on the suction side and on the pressure side of the compressor. Absorption mufflers are known for sound absorption on the pressure side of screw compressors, which essentially consist of a rectilinearly flowed, perforated tube on the circumference, which is surrounded by a jacket made of sound-absorbing material, such as steel wool. Such absorption mufflers require a large amount of space and do not have an optimal sound damping effect. It is also disadvantageous if compressed air generated by the compressor is used for the pneumatic request should serve sensitive goods, comes in contact with loose sound insulation material, since there is a risk that particles of the dam material are entrained and contaminate the material to be conveyed. For use with screw compressors, pressure-side silencers in a flat box design are also known, the box being divided by transverse walls into chambers through which the compressed air flows through the labyrinth-like flow path between the inlet and outlet openings, the chambers also partly with sound-absorbing material are lined.

The invention has for its object to provide a muffler of the type specified, which ensures a particularly effective reduction of the noise level, in particular also in the higher frequency range, in a particularly space-saving, in particular flat design, without using sound insulation material.

The solution of the task st specified in claim 1. The subclaims relate to further advantageous features of the muffler according to the invention.

An embodiment of the invention is explained in more detail with reference to the drawing.

Fig. 1 is a plan view of the muffler

Fig. 2 is a side view of the muffler

Fig. 3 is a plan view of the muffler similar to Fig. 1, but with the top wall removed

4 shows a section through the muffler along the line A-A of FIG. 1st

5 and 6 in the same representation as Fig. 3 and 4, a modified embodiment of the muffler. ι-3 3 I- ¹ 3 3 o σ 3 o H tn £ T3 α α α IT} CΛ D 3 3 3 D> cP CΛ α π 3 rt ≤ <α

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Φ CΛ Φ CΛ h- ¹ φ φ D o CΛ ιQ φ rt d 3 ^* ω ht 3 ^" DJ p Φ ιQ 3 h- ¹ Φ P- DP 3 er rt CΛ PP d rt o Φ d h- ¹ hi CΛ DJ Φ Ω od rt 13 3 Φ ιQ α hh Φ hf Ω "1 rt rt O o DJ ι-i P hi DJ CΛ hi CΛ P- DJ - • hi tr hi CΛ • -> 13 CΛ Φ DJ ιQ d 3 ^* P - hf φ DJ D - 3 ^* ιQ 3 o rt 3 ri ^¬ o £ rt rt rt φ P DJ Φ h- ¹ Φ o 3 Φ rt o rt iQ P- ι-idd ιv> rt Φ tr rt • <: 1 tt "Φ rt N φ P CΛ N> D rt 3 DJ rt hf 13 X? • rt n hf Φ ιQ α 3 Φ Ό Hi h- ¹ P o h- ¹ 3 Ω Ω oh ^ P- rt rt N hti P - P 'P- rt

3 " ^{^} O er Φ P φ 3 φ h- ^■ CΛ Hi P- • 3 ^' 3 ^" 3 d φ Φ iQ rt rt 3 Φ o DJ d 3 (Λ o 3 ^* P n: er φ CΛ φ hi rt P - φ Hi Ω hi rt 3 hf Φ Φ H 3 tr Hi o - d 3 CΛ o Φ CΛ D hi CΛ -— - Φ 3 3 ^" G α DJ DJ P- α o P ri ^¬ CΛ Φ Φ rt 3 Hi

Φ 3 φ ^* 3 <φ i N DJ d 3 Φ d h- ¹ 3 H ~ o εp ⁾ CΛ tt 3 hi Φ P Hi

N ri ^¬ CΛ O Φ Φ o hi d Φ hi Φ CΛ 3 3 hi er Φ P- Φ *. ri ^¬ o rt 3 CΛ <3 rt 3 tt CΛ - 3 i Ω d P hi P ιQ Φ α tt 3 d P- tt - O σ D od

CΛ hf φ co α 3 ^" α? T Ω CΛ Ω α ^ QPG 3 3 CL 3 Φ hi 3 CL h- ¹ 3 n hi Φ D DJ Φ rt 3 ^" rt 3 ^" P- VD Φ Φ 3 <^ P Φ 3 DJ? P- dd ιQ "α CΛ 1 H d 3 hi d Φ rt hi φ 3 1 M Φ P- o Φ ι-3 P DJ P ^ o rt Ω α hf DJ

DJ Φ • ι- (α h + i 3 Φ Φ Φ ^{^} Φ w Ω hi 3 hf Φ 3 3 h-- 3 hf; v 0) Ω ι>h-> 3 o Φ rt rt 1 1 Φ P- o • 1 3 P Φ 1 1 DJ 1 hf dr er

3 ^* 1 1 hi 3 1 1 h- ¹ 3 Φ 1 Φ 1 1 1 1 1

CL s 3 CΛ CΛ hi pi CΛ ιQ h- ¹ α Φ CΛ Hi CΛ S Φ rt 3 ≤ SD CΛ CΛ £ hi Φ CΛ CΛ 13 CL P- CD Pl P ^ α

P- φ DJ Ω Ω d CΛ Ω Φ o Φ 3 Ω P- Ω Φ P- Φ P- o d Ω P- Φ Φ hi φ Ω Φ 3 o Φ Φ CΛ P- SD

Φ P- εp 3 ^* tr 3 3 ^* 3 CΛ CΛ 13 ^" 3 3 ^" rt 3 P- φ σ CΛ 3 ^" Ω hi 3 Hi 3 3 ^* DJ hi er 1 Λ Ω 3

CΛ ιQ DJ hi ιQ ζ DJ DJ φ Hi i DJ DJ iQ α Φ 3 ^" α P- hi rt CL Φ hf s: tr 13 φ CΛ φ P ¹ DJ P- h- ¹ εp 3 τι P- DJ d P" Φ 3 ^" ι-i P- 7T P Φ 3 3 DJ N Φ Φ P- SD Λ d CΛ Hl

3 σ "3 α hf Φ o 3 d 3 P- P ¹ DJ P- o Φ d 3 O α N d CΛ hi 3 d Ω hi rt d

CΛ α ΪT- Φ α α 3 o hi CL er oa α a Φ htl υa P hi εp 3 ^ CL d • σ 13 Hi Φ CΛ 3- α 3 d tt P- D ⁾ φ hf DJ DJ α Φ CΛ DJ Φ ^ a ri ^¬ Φ 3 hf Φ 3 Φ 3 03 φ DJ P- 03 P- Ω DJ Φ 3 tQ

3 3 Ω 3 3 DJ 3 CΛ g Φ P- 3 υa 3 CΛ rt tt 3 o 3 P- s: hf iQ • 3 hi 3 Φ 3 3 ^* h- ¹ P- h- ¹ ? 3 ^* 13 α p. 3 13 Ω 3 hf Ω? Φ 13 rt Φ hi CΛ CΛ rt o 3 CΛ? V tt α hi Φ 13 P- ¹ ιQ Φ α

Φ H Hi hf na Hi tr CΛ ^ a 3 ^" o 3 Hl hi 3 D SD P-; v rt σ Φ KQ (D o 3 d Φ tt CL Φ α Φ

3 tt DJ d CΛ Hl Φ Φ DJ rt d Φ 3 DJ φ P- P- P- 3 o D ⁾ Φ Φ hi Φ 3 3 CL 3 P- tc ιQ SD Hl hi hi

Ϊ Ω d 3 φ P- 3 hf O ri ^¬ 3 13 εp hi Ω α CΛ Ω CL 3 3 -> P- 3 13 tt Q Ω φ tt 3 d P- tt 3 ^{^} Hl iQ P- 3 o • h- ¹ Hl tt hf Φ 3 Ϊ DJ rt tr Hi CΛ 3 er 03 DJ CΛ hf 3 CΛ 3 ^" li 13 3 υa CΛ

3 rt CΛ 3 α g α Hi CΛ CD φ g ri ^¬ o Hi • DJ α (D εp P- Φ iQ DJ CΛ Hl CL rt α CL £ dg DJ φ d CΛ CΛ <O g DJ tt hf Φ hf P- d Φ h- ¹ CΛ 03 Φ <er Φ φ CΛ H

Φ N φ P- CΛ 3 φ 3 3 α ri ^¬ CΛ Ω tt α 1 3 CΛ D Φ (D 0 CΛ DJ 3 0 CΛ φ hf 3 φ o-

3 d 3 hi o ^ 3 13 d tt 0 tr hf Φ S CΛ d <rt Φ DJ hi CΛ Hi o d DJ- 3 φ P- CΛ P- 3

3 * "H *» Hi σ hi hf hf DJ s hi DJ 3 φ Φ hf 3 π rt Ω (D hf Z. εp rt 3 3 d

P- JO d 3 φ Φ Ω 3 Φ h- ¹ φ ri ^¬ α CL hf 3 P 3 ^" tr Φ Φ Φ 00 N tt Φ 3

3 IT * Φ 3 - 0 o hf CΛ 3 ^" ^• » 3 3 CL tt hi Hi φ CL 3 α DJ H 3 P- or CΛ P- (D CΛ iQ

3 d H ιQ rt 3 ^* CΛ ri ^¬ α CL Φ hi d DJ S hf φ rt P- N •• CΛ Λ 3 3 εp o CΛ

Φ Hl α ζ 3 tt α Hi DJ Φ hf P- Ω CD 3 ^* DJ Hi 3 hi hf φ Φ Ω CL ιQ CΛ Φ £ hf rt Φ CL DJ Φ Φ P- 3 ^* o DJ d 3 rt lQ DJ? R CΛ hi rt P- P- Φ d α 3 03 Ω α P- tt DJ X Φ 3 CΛ rt H hf 13 ιQ Φ tt 3 D rt Λ "SD iQ P P-DJ CL 3 ^* ≤ d • α

3 d P- CΛ CL α rt • hi? Hl £ Φ P- d 3 hi CL hi rt rt 3 Φ Φ 3 h- ¹ 3 φ H P- hf Φ

CΛ O CL P- DJ o φ CL φ tt P- Φ εp DJ P- dd CΛ 13 3 CΛ h- ¹ o- CΛ DJ hi Ω hi

<^ i σ 3 Φ P- ιQ εp iQ> CΛ P- P- hi hf Ω 3 • α ιQ OJ 3 Ω O DJ Hi - P- he CL iQ d? r tr CΛ 1

P 'hi tt hf φ φ d P- 3 Φ α 3 ^* d Φ iQ? Hi d Φ 3 Φ D ⁾ h- ¹ CD er CΛ rt

DJ φ 3 Hi 0 CL hf Ω or CD Φ ≤ M hf ιQ CΛ CD Hi Hi hi Φ Λ 3 P- φ CD SD CL CD CTi

Ω P- P- Hi P- P- 3 "3 hi 13 φ 3 3 P- hf Ω o d 3 P- σ o 13 Ω hf 3 3 P- 3

3 ^" rt er 3 Φ tt φ 3 CΛ h- ¹ 3 CΛ • *» tt 3 "CΛ <Φ CΛ d α? 3 Φ 3 hh 3 ^" SD? Φ tt α 1

Φ d Φ α CΛ hf CΛ a α 13 Φ Φ o P- CΛ o 3 ^ 3 Φ DJ iQ α Φ d o

3 3 hi d rt φ φ DJ DJ P- d 3 D £ CD CΛ 3 ^{^} Φ hi DJ DJ n 3 3 Φ hi Φ hi P- CΛ 3 to er na d 3 ιQ <hf CΛ hi 3 saDJ P- h- ¹ rt O 3 N ΪP εp 3 σ φ f CΛ Ω 13 φ Φ Φ α CΛ 3 "ua Φ tt> rt Q DJ tt 3 φ DJ 3 ^" Φ d Φ KΩ DJ 3 Φ DJ rt 3 ^" hi CL CΛ CΛ tt £ rt CΛ CΛ hf 3 DJ QP Φ rt li P CΛ <Φ CΛ iQ CL O er d N d • 13 Φ d Ω

CΛ Φ ιQ ri ^¬ er 3 P "Φ? R Hl P CΛ ri ^¬ CΛ £ O hi CΛ CΛ tt α 3 Φ rt rt N Hi Φ CΛ N 3 ^" Λ ιQ Φ tt P- DJ CΛ ≤ φ ru CΛ P- O h- ¹ Φ> ≤ Ω CΛ Φ 13 P- Φ d ιQ n ιQ CΛ P- hf O

CΛ α 3 3 tr P- -> 3 ^" Ω N tt Φ P- ¹ 3 h- ¹ Φ 3 ^* CΛ hi ζ 3 hi hi CD Φ o φ P ^*

Ω Φ P- DJ H "α 3 α Ω ι-i tr d P- P 'P- d P- DJ 7i Φ CΛ Φ d hf H hf hf φ DJ

3 ^* hi tt p rt t- ¹ φ DJ 3 ^" o φ hf ιQ er Φ ιQ D 3 CΛ o CΛ Λ Ω hi> V <3 3 CΛ CΛ d σ h-"

D ⁾ CΛ Φ Φ P- CΛ rt α α 3 Φ - DJ P- Φ P 3 Ω CΛ tr α h- ¹ Φ α Φ 3 Φ h- ¹ h- ¹ rt DJ 3 Ω Hl Φ Φ T] <Φ P - Hi g 3 α 13 tr O hi Φ DJ hi hf Φ u 3 α

P ¹ hf 3 3 ^* 3 ^" dd α hi hf o φ rt S hf g P-> DJ hi DJ hi DJ 3 rt £ CΛ o hf Φ DJ

CL Φ CΛ Φ hf σ φ hf i d P Φ d 3 tt \ -> d N Φ Φ Φ 3 Hi CL 3

DJ Ω α Ω H 0 p ^ CΛ a 2 α z. CΛ er 3 P Φ 3 d 13 CΛ - ¹ DJ σ 3 <3 PP o Φ 13

3 Λ "α> 3 ^" <CL α PD ⁾ o Φ φ P- Φ hf 3 Hi CΛ CL d Φ d Φ α 3 na N P- ¹ CΛ o Hl

13 Φ 3 DJ O φ P Ω φ li 3 hf 3 Ω P hi <! ri ^¬ ≤ P- tt o DJ Hi 3 CΛ li d Φ 3 • ιQ 3 φ

Hl 3 hf hf tt tr hf rt rt d CL 3 ^* Ω DJ o tt φ 3 hf hi 3? R CΛ 3 ^* 3 hi Φ 03 Φ CΛ hf

Φ α CΛ lf φ Hi P DJ 3 d 3 ^J P * 3 CΛ ιQ P CΛ 13 Φ o Φ SD u rt • 3 d rt CΛ hf Φ P CL DJ Φ π hf P "3 ιQ 3 α Φ s: Φ d σ Hi cn 3 3 "Hi CΛ hf

CΛ 3 Ω D> a P- hi 3 Φ P vQ Φ 3 o h- ¹ <3 3 Φ DJ Φ φ 13 • rt 3 -> CΛ P ¹ ? rt d 3

3 ^" 3 φ 3 - h- ¹ 3 hf h- ¹ O o ιQ CΛ 3 hi rϊ hi 3 P- DJ P P-> DJ hf o

DJ d Ό 3 1 J d DJ O 3 h- ¹ CΛ hf d li ^¬ 1 CΛ N φ DP rt Ω Ω o 3 P rt iQ d 3 α d 3 <rt 3 P- Φ tt φ 1 Φ ε tt rt CΛ Φ CΛ 3 ^{* *} 3 rt P 1

Hi CL Φ Φ Φ rt O P- rt hi hi 3 ^* hf 1 Φ CL rt o 1 1 hi φ 3 O 1 rt o 3 03 3

1 1 3 1

CΛ zd N CΛ *. hti SDNH a N Φ rt 03 α O h- ¹ 3 JO α Φ "3 h (rt σ CΛ li ^¬ CΛ rt

Ω DJ 3 Φ Z P- P * P- d z P- Φ d P- H Φ P- Φ CD Φ φ SD hi P- Φ Φ Φ Φ tt P- hf

3 ^* 3 hf d 3 Φ Ω hi φ Ω 3 Φ 3 P- P- Φ Hl tr H h (Hi CΛ 3 hi hf 3 φ

3 α ~ \ 3 α α X 3 ^" Ω P- 3 ^" hi rt Hi P 'hi H "SD P-. O α φ 3 CΛ α rt

P- OD ιQ ^ CD P- rt tr rt rt PJ CΛ H Hl α t- ¹ Φ d Φ Φ d 3 3 φ P- α Ω Φ rt co α d Φ hi o P- rt Φ d 3 tt Φ rt Φ d X Φ hi X Hi CL Cπ (D 3 Ω φ 3 "3 rt -J Φ hf 3 CΛ 3 H 3 α ri ^¬ hi hh P- hi tt P- d 3 3 ^* 3 P- α hf Ω ON CΛ P - JO ιQ Φ £ D tt α rt O o SD 3 d N h Φ tt P- d α d 3 ^* Z zz P- rt Φ 3 d 3 P- P- 3 NO 3 er na 3 Φ hf 3 CΛ CL Φ 3

Φ 3 α CΛ P- α φ SD CΛ rt Hl tr H α φ 3 hh CΛ d Φ Φ N CΛ CL 3 φ rt CΛ CL

H ιQ Φ rt H DJ P- 3 rt CΛ P- N Φ hi Z 3 hh 3 P- Λ hh H P- φ

Φ hf hf α ε rt α O: Φ 3 Ξ φ P- ^ 1 tt DJ tt φ σ> dd: O: Ω α I Hi O: • tt Hi X rt φ P- tr * 3 P- P- 3 CΛ tt N -> 3 3 Φ 3 "3 3" JO Φ

P- DJ: o 3 α 3 o Hi P- Φ P- 3 d P ¹ CL ri X d rt DJ: N CL 3 hi d tt φ hf

3 3 ^* d 0: <Φ Cπ SD 3 oh Φ Hi D • D ⁾ : hi P- εp φ N Φ 3 3 hh rt hi hi Hi 0 hi yes ε d 3 α rt d cP Φ O: o σ φ P - JO σ 3 and others P ¹ 1–1. hf Ω Hi hf Φ d 3 C α d tt hi Cπ rt P- 3 3 Φ α 3 Φ Φ CΛ CΛ Φ tt

P- 3 ^* 3 N tr ¹ Hi 3 α z φ ι-i ι-i er Ω • 3 d CΛ SD Φ CL HN rt X s: rt CΛ ddd α P- DJ hi Ω CΛ Φ 3 "d Φ 3 zd : CΛ CΛ 3 d Φ d φ hf P- Φ rt Φ rt 3 Hl tt Φ J-. 3 3 ^* ri ^¬ P- 3 DJ: 3 Ω N P- CΛ O: O P-

CΛ P- hf CΛ rt X α P> CL φ P * tt DJ CL 0 CΛ 3 CΛ tr Φ P- Ω Φ Ω 3 3 h- ¹

O: Ω O: Φ «P- P- α H SD P- p CL c CL rt d (D P- Φ 3 ^* P- 3" d Φ P-

Hl tr 3 3 Φ φ o φ ddo CΛ tP JO 3- er CTi Φ φ Φ P- Hl h- ¹ 3 H 3 z 3 3

Hi O: P- P- 3 H 3 -J ri ^¬ O: Φ hi Φ hi ita Ω rt Φ dz φ P- φ

3 Hi co CΛ 3 CΛ 3 Ω li ^¬ - tt Hi Hl φ H α φ H CL 3 P- H 3 CΛ P- 3 d HHK φ Z P- 3 "tt 3 Hl hi Φ DJ 3 CL CL 3 tt DJ: 3 hi α Λ 3

3 O 3 vQ DJ 3 rt hf α 3 φ P- H Φ φ P-. ri3 o? σ P- d> na εp d α P- tt 3 α hf er P- O d X CΛ Ω KΩ tr h! Φ tt 13 CL <CΛ hi ιQ Φ <3 1

3 Φ CΛ z CL tu P- H φ Φ 3 P- rt 3 Φ hi α 3 Hi P- O SD Φ? hf Φ CΛ

KΩ o hf rt d CΛ rt o Hl na o H CΛ Φ tr ¹ CΛ P- Φ hh 3 3 P- Φ CΛ H rt -

, α 3 co li ^¬ rt Ω φ h- ¹ Φ 3 O: N3 rt hi d P- Φ CL H P- φ rt P- Ω er ι-i

Φ φ α α tt CΛ ^* rt Φ 3 (Λ 3 P ¹ Φ Φ Hl Ω CΛ tt CΛ N CΛ 3 cr rt - P- O: 1 hi P ¹ hf φ Φ 3 O: Φ ZXZ d t- «rt tr H - P- Ω SD Φ 3 3 3

CΛ H 3 CΛ Hi 3 SD P- co DJ 3 P- D na Φ tr G 3 3 P- α li na α rt tt Φ H o KΩ 3 3 rt d φ CL Φ z H SD 3 α rt d P- hi Φ Φ α hi Φ 3 P- P- 3 CL Φ hi H d CΛ oo ri ^¬ - ¹ rt P- P- rt 3 Ω

O: hf 3 d Φ P- d CΛ 3 CΛ HN CL 3 Ω CΛ hi Ω hi σ tt P- Φ 3 Φ 3 "cP H CΛ 3 3 3 rt« hi ⁾ d P- 3 ^* rt Ω 3 ^{^} CΛ Φ Φ hi rt tt N JO Ω rt Φ Φ • P- SD Φ Cπ hi tt> rt H 3 P- li ^¬ P- 3 CL P- α <3 d

H z Φ 3 ^" hi P- Φ - 3 P- - d hi Φ Φ tt d P- hi 3 Φ Φ P- 3

Φ Hl CΛ O: 3 α 3 H CL> CΛ P- Ω CL 3 "tr α CΛ CΛ d: 3 hf rt z P- rt 3 DJ d Φ SD: CL dd Hl rt? P- rt Φ P- Hl CΛ Ω d

P- rt Φ H d 3 hi O hi co εp P- CΛ CΛ d: rt φ Φ 3 φ d: P-? φ φ hi α tt tt Φ XO: 3 CL Ω CD Cπ rt tt rt rt 3 ^{^} CΛ 3 α CL 3 ^" O d CΛ P- CΛ φ 3

3 P- 3 na Φ ^* S • H hi HO:> d SH 3 3 (D 3 (D 3 rt

CL O Λ CΛ ι-i rt α P- (D P- P- d hh d H er o d Φ uQ 3 N Ω ιQ

Φ JO 3 d S hf Φ rt P- M 3 rt rt 3 hh «CΛ Ω Φ α 3 3 rt Φ tr α tt hf Φ CΛ φ tt <: P- hf li ^¬ Φ 3 rt rt 3 o rt tr CΛ P - • Φ ^ rt d na

Hl ≤ H Φ ri tt P- CΛ CΛ CΛ d σ hi Ω Hi CΛ O 3 3 φ hi tt

SD CΛ H rt φ ri ^¬ CΛ 3 ^" O:? H 3 Φ P- Φ 3 ^" P- Hl 3 Φ 3 Ω 3 d φ 3 Ω SD CΛ CΛ H <! rt hi hl DJ O P- rt P- H? O SD 3 tr n

Φ X α 3 "d Φ O: CΛ o tt H Φ Hi g hi Φ rt 3 P- D ⁾ H CΛ d Z Φ f hf P- 3 Hi rt Hl ri ^¬ 3 P- O: 3 3 g 3 3 _l. CΛ Φ tt rt 3 Ω Hi ^ Φ α hi

1 O co P- ιQ N Hi tt 3 3 d φ φ? er P- 3 rt DJ Ω P- P-

3 Cπ rt tt rt 3 3 Φ Φ d er 3 hi hh α DJ o CD o α SD hi g 3 "Φ Ω rt 1 d P- 3 Φ Φ CL 3 3 Φ 1 tr

3 O 3 £ 1 P- hi Φ Φ d ri ^¬ na φ Φ CΛ 1 P ¹ KD φ hf 3 hf 3 tt

1 hi 1 P ¹ H 1 1 rt

Claims

claims

1. muffler for connection to the pressure outlet of a compressor, with a substantially flat housing (1) which is formed by a substantially flat bottom wall (3), a substantially parallel top wall (5) and peripheral walls (7), an inlet opening (9) in the bottom wall (3) and an outlet opening (11) in the top wall (5), and one between the bottom wall (3) and top wall (5) arranged approximately parallel to this partition (15), which the interior of the Dividing the housing into an inlet chamber (15) and an outlet chamber (19), the partition (15) having at least one passage area (21) in which numerous small openings are arranged closely next to one another in the partition wall (15), and the passage area ( 21) at a distance, seen parallel to the partition, from the inlet opening (9) and from the outlet opening (11) is arranged such that gaseous medium supplied by the compressor from the inlet opening (9) through the Inlet chamber (17) to the passage area (21) and from this through the outlet chamber (19) to the outlet opening (11) flows essentially parallel to the partition (15).

2. Muffler according to claim 1, characterized in that the sum of the passage cross sections of all the openings arranged in the passage area (21) is equal to or greater than the opening cross section of the inlet opening (9).

3. Silencer according to claim 1 and 2, characterized in that the clear height of the inlet chamber (17) and the clear height of the outlet chamber (19), viewed perpendicular to the partition (15), is less than half, preferably less than a quarter, the length and width of the inlet chamber (17) and outlet chamber (19), seen parallel to the partition (15).

4. Silencer according to one of claims 1 to 3, characterized in that the headroom of the outlet chamber (19) is greater than that of the inlet chamber (17).

5. Muffler according to one of claims 1 to 4, characterized in that the bottom wall (3), top wall (5), peripheral walls (7) and partition (17) of the housing

Aluminum exist and that no sound absorption material is arranged in the interior of the housing (1).

6. Muffler according to one of claims 1 to 4, characterized in that in the outlet chamber (19) at least one reflection wall (35, 37) is arranged, which is substantially transverse to the flow path from the passage area (21) to the outlet opening (11) flowing air and has at least one flow opening (39, 41) for the passage of air.

7. Muffler according to claim 6, characterized in that, in the presence of two or more reflection walls (35, 37), the passage openings (39, 41) of which are offset in the transverse direction of the flow path of the air.

8. Arrangement of a muffler according to one of claims 1 to 7 between a compressor and a consumer downstream of the compressor for compressed air, the inlet opening (9) with the pressure outlet of the compressor and the outlet opening (11) with the compressed air inlet of the Consumer is connected directly or via an intermediate line.