JP2008540891A - Suction muffler for cooling compressor - Google Patents

Suction muffler for cooling compressor Download PDF

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JP2008540891A
JP2008540891A JP2008509271A JP2008509271A JP2008540891A JP 2008540891 A JP2008540891 A JP 2008540891A JP 2008509271 A JP2008509271 A JP 2008509271A JP 2008509271 A JP2008509271 A JP 2008509271A JP 2008540891 A JP2008540891 A JP 2008540891A
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opening
duct
gas
suction muffler
suction
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アルバレンガ，エドアルド・デ・ソーザ
リンク，ロドリゴ
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ワールプール・エシ・ア
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/0027—Pulsation and noise damping means
    • F04B39/0055—Pulsation and noise damping means with a special shape of fluid passage, e.g. bends, throttles, diameter changes, pipes
    • F04B39/0061—Pulsation and noise damping means with a special shape of fluid passage, e.g. bends, throttles, diameter changes, pipes using muffler volumes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/0027—Pulsation and noise damping means
    • F04B39/0055—Pulsation and noise damping means with a special shape of fluid passage, e.g. bends, throttles, diameter changes, pipes
    • F04B39/0066—Pulsation and noise damping means with a special shape of fluid passage, e.g. bends, throttles, diameter changes, pipes using sidebranch resonators, e.g. Helmholtz resonators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/0027—Pulsation and noise damping means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/0027—Pulsation and noise damping means
    • F04B39/0033—Pulsation and noise damping means with encapsulations
    • F04B39/0038—Pulsation and noise damping means with encapsulations of inlet or outlet channels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/10—Adaptations or arrangements of distribution members
    • F04B39/1066—Valve plates
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B31/00—Compressor arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D17/00—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces
    • F25D17/04—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection
    • F25D17/06—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection by forced circulation
    • F25D17/08—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection by forced circulation using ducts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2210/00—Working fluid
    • F05B2210/10—Kind or type
    • F05B2210/12—Kind or type gaseous, i.e. compressible
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2260/00—Function
    • F05B2260/96—Preventing, counteracting or reducing vibration or noise
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S181/00—Acoustics
    • Y10S181/403—Refrigerator compresssor muffler

Abstract

冷却コンプレッサ用のサクションマフラであって、減衰チャンバ（１３、１４）の内部と外部を連通させる、入口開口部（２１、３１）と出口開口部（２２、３２）とを有するガス入口ダクト（２０）とガス出口ダクト（３０）とを担持する減衰チャンバ（１３、１４）を画定する中空本体（１０）を備え、ガス入口およびガス出口ダクト（２０、３０）が、閉鎖端部（２３、３３）を有し、入口および出口開口部（２１、２２、３１、３２）が、上記開口部の同じダクト（２０、３０）の他方の開口部に対する距離よりも小さな一定の距離を上記閉鎖端部（２３、３３）から置いて、所定の周波数に対して最小音響圧力を生じる同じダクト（２０、３０）の領域に位置決めされ、上記ダクト（２０、３０）と上記開口部（２１、３１、２２、３２）のうちの第１の開口部の断面の寸法決めが、サクションマフラの内側のガス振動ノイズを最小限に抑える。  A suction muffler for a cooling compressor, comprising a gas inlet duct (20) having an inlet opening (21, 31) and an outlet opening (22, 32) communicating the inside and the outside of the damping chamber (13, 14). ) And a gas discharge duct (30) carrying a hollow body (10) defining a damping chamber (13, 14), wherein the gas inlet and gas outlet ducts (20, 30) are closed ends (23, 33). ), The inlet and outlet openings (21, 22, 31, 32) having a constant distance smaller than the distance of the opening to the other opening of the same duct (20, 30). (23, 33), positioned in the same duct (20, 30) region that produces a minimum acoustic pressure for a given frequency, the duct (20, 30) and the opening (21, 31, 22). First dimensioning of the cross section of the opening of the 32) are minimized inside the gas vibration noise of the suction muffler.

Description

本発明は、冷却コンプレッサ用のサクションマフラであって、特に冷蔵庫、冷凍庫、噴水式水飲み器、冷蔵ショーケースなどの小型の冷却システムで使用される、冷媒ガスが密閉型コンプレッサに入れられる区域に設けられるタイプのものに関する。   The present invention is a suction muffler for a cooling compressor, particularly used in a small cooling system such as a refrigerator, a freezer, a fountain-type drinker, a refrigerated showcase, etc. Related to the type of

通例、冷蔵システムのコンプレッサは、その吸込み側に、外殻の内側に設けられた音響減衰システムまたはサクションマフラを有する。これは上記冷蔵システムの吸込みラインから到来するガスを吸込み弁へと導くが、この吸込み弁は従来的には、コンプレッサの吸込みおよび吐出し弁が通常取り付けられている弁板のそれぞれの吸込みオリフィスの選択的かつ自動的な開放をもたらすように配設されている。   Typically, a compressor of a refrigeration system has an acoustic damping system or a suction muffler provided inside the outer shell on its suction side. This leads the gas coming from the intake line of the refrigeration system to the intake valve, which has traditionally been associated with each intake orifice of the valve plate to which the compressor intake and discharge valves are normally mounted. Arranged to provide selective and automatic opening.

サクションマフラは、コンプレッサの適切な動作にとっていくつかの重要な機能を有する。これには例えば、ガスを案内すること、吸込みによって引き起こされた振動から生じるノイズを減衰すること、シリンダ内に引き込まれているガスを断熱すること、吸込み弁の動きを制御することなどがある。   The suction muffler has several important functions for proper operation of the compressor. This includes, for example, guiding the gas, attenuating noise resulting from vibrations caused by suction, insulating the gas drawn into the cylinder, and controlling the movement of the suction valve.

本冷却コンプレッサは、ボリューム管タイプのサクションマフラを使用する。このタイプのサクションマフラは通常、吸込みラインから到来するガスを直接吸込み弁に向けて導く管によって相互連結された一連のボリュームからなる。現在、上記管は、冷媒ガスの通路のための開放端部を有している。   This cooling compressor uses a volume pipe type suction muffler. This type of suction muffler typically consists of a series of volumes interconnected by tubes that direct the gas coming from the suction line directly towards the suction valve. Currently, the tube has an open end for the passage of the refrigerant gas.

ガスの移動は振動を生み出し、吸込み弁に向かうガス流れと反対の方向に伝播されるノイズを生成する。サクションマフラが、ガスがマフラ内に入ってゆくその吸音出口で効率的である程、上記振動は小さくなる。   The movement of the gas creates vibrations and generates noise that propagates in the opposite direction to the gas flow towards the suction valve. The more efficient the suction muffler is at its sound absorption outlet through which gas enters the muffler, the smaller the vibration.

コンプレッサの性能に対するサクションマフラの影響は極めて重要であり、サクションマフラの内側ボリュームと管の長さ両方に対する寸法決めが、コンプレッサの効率を大きく決定する。知られているボリューム管タイプのサクションマフラは広く使用されているが、上記管の特定の動作モードでノイズピークを呈するという欠点を有する。   The effect of the suction muffler on the performance of the compressor is extremely important, and the sizing of both the inner volume of the suction muffler and the length of the tube greatly determines the efficiency of the compressor. Although known volume tube type suction mufflers are widely used, they have the disadvantage of exhibiting noise peaks in certain operating modes of the tube.

本発明の目的は、従来技術の解決方法の不都合さを提示せずに、ガスが引込み弁に引き込まれてゆく際に生じる振動に対してより良好なノイズ減衰をもたらす、往復式密閉コンプレッサ用のサクションマフラを提供することである。   The object of the present invention is for a reciprocating hermetic compressor that provides better noise attenuation against vibrations that occur when gas is drawn into a retraction valve without presenting the disadvantages of prior art solutions. It is to provide a suction muffler.

本発明のより詳しい目的は、特定の周波数帯域に対する音響減衰を最適化することができる上述のサクションマフラを提供することである。   A more detailed object of the present invention is to provide a suction muffler as described above that can optimize acoustic attenuation for a particular frequency band.

本発明のこれらおよび他の目的は、外殻内に取り付けられた冷却コンプレッサ用のサクションマフラであって、減衰チャンバに対して外部の入口開口部と、減衰チャンバの内部にある出口開口部とを有するガス入口ダクト、ならびに減衰チャンバの内部にある入口開口部と、上記減衰チャンバに対して外部の出口開口部とを有するガス出口ダクトを担持する少なくとも１つの減衰チャンバを画定する中空本体を備え、ガス入口およびガス出口ダクトの少なくとも一方が少なくとも１つの閉鎖端部を有し、入口および出口開口部の１つが、それぞれのダクトに沿って、上記開口部の同じダクトの他方の開口部に対する距離よりも小さい一定の距離を上記閉鎖端部から置いて、所定の周波数に対して最小の音響圧力を生じるこの同じダクトの領域に位置決めされ、上記ダクトと上記開口部の第１の開口部の断面の寸法は、サクションマフラの内側のガス振動ノイズを最小限に抑えるように決められているサクションマフラを提供することによって達成される。   These and other objects of the present invention are a suction muffler for a cooling compressor mounted in an outer shell, comprising an inlet opening external to the damping chamber and an outlet opening inside the damping chamber. A hollow body defining a gas inlet duct having at least one damping chamber carrying a gas outlet duct having a gas inlet duct having an inlet opening inside the damping chamber and an outlet opening external to the damping chamber; At least one of the gas inlet and gas outlet ducts has at least one closed end, and one of the inlet and outlet openings is along the respective duct by a distance from the opening of the same duct to the other opening of the same duct. A region of this same duct that places a minimum constant distance from the closed end to produce the lowest acoustic pressure for a given frequency Positioned and the cross-sectional dimensions of the duct and the first opening of the opening are achieved by providing a suction muffler that is determined to minimize gas vibration noise inside the suction muffler. .

上記ガスダクトと上記開口部の断面の寸法は、吸込み弁の閉鎖および開放時に発生するサクションマフラの内側のガス振動ノイズを最小にするように決められる。最小音響圧力の領域は、ダクトの音響モードの結節点として表される。   The cross-sectional dimensions of the gas duct and the opening are determined so as to minimize gas vibration noise inside the suction muffler that occurs when the suction valve is closed and opened. The region of minimum acoustic pressure is represented as the node of the acoustic mode of the duct.

本発明を、本発明の一実施形態の一例としてここに掲げる添付図面に基づいて以下に述べる。   The present invention will be described below with reference to the accompanying drawings shown here as an example of an embodiment of the present invention.

本発明は、冷却システムで使用されるタイプのコンプレッサであって、密閉外殻１の内側に、一方端部にピストン３を入れておき、反対端部をシリンダカバー４によって閉鎖させて、その中に、シリンダ２の内側でピストン３の上部分とシリンダ２の反対端部およびシリンダカバー４の間に設けられた弁板７との間に画定された圧縮チャンバ６と、吸込みおよび吐出し弁８ａ、８ｂによってそれぞれ閉鎖された吸込みオリフィス７ａと吐出しオリフィス７ｂを介して選択的に流体連通する吸込みチャンバ（図示せず）と吐出しチャンバ５を画定するシリンダブロックを有するモータコンプレッサアセンブリを備えるコンプレッサに関して記載する。   The present invention is a compressor of the type used in a cooling system, in which a piston 3 is placed at one end inside a sealed outer shell 1 and an opposite end is closed by a cylinder cover 4, And a compression chamber 6 defined between the upper part of the piston 3 inside the cylinder 2 and a valve plate 7 provided between the opposite end of the cylinder 2 and the cylinder cover 4, and a suction and discharge valve 8a. , 8b with respect to a compressor comprising a motor compressor assembly having a suction chamber (not shown) and a cylinder block defining a discharge chamber 5 selectively in fluid communication via a suction orifice 7a and a discharge orifice 7b, respectively. Describe.

図示しているところによるとコンプレッサによって引き込まれ、コンプレッサが結合されている冷却システムの吸込みライン（図示せず）から到来するガスは、サクションマフラから外殻１の内部に到達するが、このサクションマフラは、一般に上記外殻１の内側に設けられ、コンプレッサの吸込みチャンバの内部と流体連通するように維持されている。   As shown, the gas drawn in by the compressor and coming from the suction line (not shown) of the cooling system to which the compressor is coupled reaches the inside of the outer shell 1 from the suction muffler. Is generally provided inside the outer shell 1 and is maintained in fluid communication with the interior of the compressor suction chamber.

ここに同封する図面で示しているように、本発明のサクションマフラは、プラスチックなどの低熱伝導性の材料で全体が作られている中空本外１０を備えるが、これは、少なくとも１つの減衰チャンバ１３であって、例えば上記中空本体１０の内部にあり、減衰チャンバ１３に対して外部の入口開口部２１と、減衰チャンバ１３の内部にある出口開口部２２とを有するガス入口ダクト２０、ならびに減衰チャンバ１３の内部にある入口開口部３１と上記減衰チャンバ１３に対して外部の出口開口部３２とを有するガス出口ダクト３０を担持する減衰チャンバ１３を画定する。   As shown in the enclosed drawings, the suction muffler of the present invention comprises a hollow outer 10 made entirely of a low thermal conductivity material such as plastic, which comprises at least one attenuation chamber. A gas inlet duct 20, for example inside the hollow body 10 and having an inlet opening 21 external to the damping chamber 13 and an outlet opening 22 inside the damping chamber 13, and damping A damping chamber 13 is defined which carries a gas outlet duct 30 having an inlet opening 31 inside the chamber 13 and an outlet opening 32 external to the damping chamber 13.

本発明によると、ガス入口およびガス出口ダクト２０、３０の少なくとも一方は少なくとも１つの閉鎖端部２３、３３を有し、入口および出口開口部２１、２２、３１、３２のうちの１つが、閉鎖端部２３、３３から、同じダクト２０、３０の上記開口部の他方の開口部に対する距離よりも小さな一定の距離を置いてそれぞれのダクト２０、３０に沿って、所定の周波数に対して最小音響圧力を生じるその領域に位置決めされ、上記ダクト２０、３０と、上記開口部２１、３１、２２、３２のうちの第１の開口部の断面の寸法は、サクションマフラの内側のガス振動ノイズを最小限にするようなやり方で決められる。   According to the invention, at least one of the gas inlet and gas outlet ducts 20, 30 has at least one closed end 23, 33, one of the inlet and outlet openings 21, 22, 31, 32 being closed. Minimum acoustics for a given frequency along each duct 20, 30 at a certain distance from the ends 23, 33 at a distance smaller than the distance of the opening of the same duct 20, 30 to the other opening. The dimension of the cross section of the first opening of the ducts 20, 30 and the openings 21, 31, 22, 32, which is positioned in the area where pressure is generated, minimizes gas vibration noise inside the suction muffler. Decided in such a way as to limit.

本発明によると、各閉鎖端部２３、３３は、最小音響圧力の上記領域を支配している同じガス圧力を受ける。   According to the present invention, each closed end 23, 33 is subjected to the same gas pressure governing the region of minimum acoustic pressure.

図２および図３で示している構造では、サクションマフラは減衰チャンバ１３を有しているが、減衰チャンバ１３には、ガス入口ダクト２０であって、その入口開口部２１を、コンプレッサが結合された冷却システムの吸込みラインに連結されたコンプレッサへのガス供給部と流体連通させ、その出口開口部２２を、例えばコンプレッサの弁板７の吸込みオリフィス７ａに直接連結されるコンプレッサの吸込み側と流体連通させるガス入口ダクト２０が設けられている。   In the structure shown in FIGS. 2 and 3, the suction muffler has a damping chamber 13. The damping chamber 13 is a gas inlet duct 20, and its inlet opening 21 is connected to a compressor. Fluid communication with the gas supply to the compressor connected to the suction line of the cooling system, and the outlet opening 22 is in fluid communication with the suction side of the compressor directly connected to the suction orifice 7a of the valve plate 7 of the compressor, for example. A gas inlet duct 20 is provided.

本発明の構造上の選択肢によれば、第１減衰チャンバ１３のガス出口ダクト３０の出口開口部３２は、例えば図５に示しているように他方の減衰チャンバ１４を介して吸込みオリフィス７ａと流体連通するように維持され、上記他方の減衰チャンバ１４は、上記他方の減衰チャンバ１４の内部に通じる入口開口部４１と、吸込みオリフィス７ａに連結された出口開口部４２とを有する別のガス出口ダクト４０を有する。   According to the structural option of the present invention, the outlet opening 32 of the gas outlet duct 30 of the first damping chamber 13 is connected to the suction orifice 7a and the fluid via the other damping chamber 14, for example as shown in FIG. The other damping chamber 14 is maintained in communication and has another gas outlet duct having an inlet opening 41 leading to the interior of the other damping chamber 14 and an outlet opening 42 connected to the suction orifice 7a. 40.

図５に示している構造では、サクションマフラは、例えば、上記中空本体１０に対して内部の、また共通壁１５によって相互に離隔された２つの減衰チャンバ１３、１４を画定する中空本体１０を備える。上記第１の減衰チャンバ１３の内部に、ガス入口ダクト２０の出口開口部２２が突出し、ガス出口ダクト３０の入口開口部３１は、その出口開口部３２を、他方の減衰チャンバ１４の内部に突出させて、上記減衰チャンバ１３、１４の間に流体連通をもたらす。   In the structure shown in FIG. 5, the suction muffler comprises a hollow body 10 that defines two damping chambers 13, 14, for example, internal to the hollow body 10 and separated from each other by a common wall 15. . The outlet opening 22 of the gas inlet duct 20 protrudes into the first attenuation chamber 13, and the inlet opening 31 of the gas outlet duct 30 protrudes from the outlet opening 32 into the other attenuation chamber 14. To provide fluid communication between the damping chambers 13,14.

この構造では、他方の減衰チャンバ１４の内部にも別のガス出口ダクト４０の入口開口部４１が突出しており、この別のガス出口ダクト４０は、出口開口部４２を弁板７の吸込みオリフィス７ａに連結させている。   In this structure, an inlet opening 41 of another gas outlet duct 40 also protrudes inside the other damping chamber 14, and this another gas outlet duct 40 has an outlet opening 42 that is connected to the suction orifice 7 a of the valve plate 7. It is connected to.

本発明によると、ガスダクト２０、３０、４０はそれぞれ、その入口および出口開口部２１、２２、３１、３２、４１、４２の少なくとも１つが、このダクト２０、３０、４０に沿って、同じダクト２０、３０、４０の各閉鎖端部２３、３３から、同じダクト２０、３０、４０の他方の開口部に対する上記開口部の距離よりも短い一定の距離を置いて、所定の周波数に対して最小音響圧力を生じるこのダクト２０、３０、４０の領域に位置決めされるように画定された外形を有し、上記ダクト２０、３０、４０と、上記開口部２、３１、２２、３２、４１、４２の第１の開口部の上記断面の寸法決めは、サクションマフラの内部のガス振動ノイズを最小限にするように画定され、上記開口部２１、３１、２２、３２、４１、４２の第１の開口部の中間線と、上記閉鎖端部２３、３３が設けられた同じダクト２０、３０、４０の閉鎖端部２３、３３との距離は、上記開口部２１、３１、２２、３２、４１、４２の直径の半分よりも大きい。   According to the invention, each of the gas ducts 20, 30, 40 has at least one of its inlet and outlet openings 21, 22, 31, 32, 41, 42 along the same duct 20, along this duct 20, 30, 40. , 30, 40 from each closed end 23, 33 at a certain distance shorter than the distance of the opening relative to the other opening of the same duct 20, 30, 40, and the minimum acoustic wave for a given frequency. Having an outline defined to be positioned in the area of this duct 20, 30, 40 that produces pressure, and the ducts 20, 30, 40 and the openings 2, 31, 22, 32, 41, 42 The dimensioning of the cross-section of the first opening is defined to minimize gas vibration noise inside the suction muffler, and the first opening of the openings 21, 31, 22, 32, 41, 42. The distance between the intermediate line and the closed ends 23, 33 of the same ducts 20, 30, 40 provided with the closed ends 23, 33 is the distance between the openings 21, 31, 22, 32, 41, 42. Greater than half the diameter.

図２、図３、および図４に示している構造上の選択肢では、サクションマフラの中空本体１０は、内部に減衰チャンバ１３を１つだけ有しており、減衰チャンバ１３の内部に、ガス入口ダクト２０の出口開口部２２と、ガス出口ダクト３０の入口開口部３１とが突出している。しかしこの構造では、ガス入口ダクト２０は、上記ガス入口ダクト２０の入口開口部２１の付近に位置付けられた、最小音響圧力の結節領域に画定された閉鎖端部２３を有する。この構造では、ガス出口ダクト３０は、閉鎖端部を有しても、有さなくてもよい。図４は、図２に示すガス出口ダクト３０が、上記ガス出口ダクト３０の入口開口部３１の付近に設けられた閉鎖端部３３を有する構造を示す。   2, 3, and 4, the hollow body 10 of the suction muffler has only one damping chamber 13 inside, and inside the damping chamber 13 is a gas inlet. An outlet opening 22 of the duct 20 and an inlet opening 31 of the gas outlet duct 30 protrude. However, in this configuration, the gas inlet duct 20 has a closed end 23 defined in the nodal region of minimum acoustic pressure, located near the inlet opening 21 of the gas inlet duct 20. In this configuration, the gas outlet duct 30 may or may not have a closed end. FIG. 4 shows a structure in which the gas outlet duct 30 shown in FIG. 2 has a closed end 33 provided in the vicinity of the inlet opening 31 of the gas outlet duct 30.

本発明によれば、各ガス入口およびガス出口ダクト２０、３０、４０は、各減衰チャンバ１３、１４のそれぞれの閉鎖端部２３、３３を少なくとも１つ有することができる。   In accordance with the present invention, each gas inlet and gas outlet duct 20, 30, 40 can have at least one closed end 23, 33 for each attenuation chamber 13, 14.

図５で示す構造では、ガス入口ダクト３０は減衰チャンバ１３の内部で、上記ガス入口ダクト３０の入口開口部３１の付近に、閉鎖端部３３を有する。ここでは図示していないが、言うまでもなく、閉鎖端部を同じガスダクトの出口開口部に隣接して設けることもできる。   In the structure shown in FIG. 5, the gas inlet duct 30 has a closed end 33 in the attenuation chamber 13 in the vicinity of the inlet opening 31 of the gas inlet duct 30. Although not shown here, it goes without saying that a closed end can be provided adjacent to the outlet opening of the same gas duct.

ここに図示していない他の構造上の代替形態では、最小音響圧力の領域に画定される開口部は、それぞれの減衰チャンバ１３、１４で、中空本体１０の内側の各ガス入口およびガス出口ダクト２０、３０、４０の入口および出口開口部２１、２２、３１、３２、４１、４２のうちの１つである。   In other structural alternatives not shown here, the openings defined in the region of minimum acoustic pressure are the respective damping chambers 13, 14 in the respective gas inlet and outlet ducts inside the hollow body 10. One of the 20, 30, 40 inlet and outlet openings 21, 22, 31, 32, 41, 42.

少なくとも１つの閉鎖端部２３、３３が設けられたガスダクト２０、３０、４０（または中空本体１０に設けられる可能性のある他のダクト）の外形の画定から、減衰された一定の周波数を有するように音響モードが決定され、上記減衰は、最小音響の結節を有する（複数の）ガスダクト２０、３０、４０の領域、即ち最小圧力を備えた領域で起こる。サクションマフラの各ガスダクト２０、３０、４０で支配している圧力は、最小圧力と最大圧力の領域を有する静止または音響圧力である。最小圧力の領域が決定された後は、各ダクト２０、３０、４０の上記入口開口部２１、３１、４１または出口開口部２２、３２、４２とそれぞれの閉鎖端部２３、３３とを設ける領域を決定することができる。結節領域に１つまたは複数の開口部が設けられた各ガスダクト２０、３０、４０は、それぞれの閉鎖端部２３、３３を、ガスが上記サクションマフラの中空本体１０の内部と直接に連通するのを回避するようなやり方で構築させて有する。   Due to the definition of the outer shape of the gas ducts 20, 30, 40 (or other ducts that may be provided in the hollow body 10) provided with at least one closed end 23, 33, to have a constant frequency attenuated The acoustic mode is determined and the attenuation occurs in the region of the gas ducts 20, 30, 40 having the least acoustic nodules, i.e. the region with the minimum pressure. The pressure governing each gas duct 20, 30, 40 of the suction muffler is a static or acoustic pressure having a region of minimum pressure and maximum pressure. After the area of the minimum pressure is determined, the areas where the inlet openings 21, 31, 41 or the outlet openings 22, 32, 42 and the closed ends 23, 33 of the ducts 20, 30, 40 are provided. Can be determined. Each gas duct 20, 30, 40 provided with one or more openings in the knot region communicates the respective closed end 23, 33 directly with the interior of the hollow body 10 of the suction muffler. It is built in such a way as to avoid.

本発明の構造上の選択肢では、図３に示すように、中空本体１０の内側壁部分が、ガスダクト２０、３０、４０の閉鎖端部２３、３３が固定して嵌められたカバー部分を画定し、上記カバー部分は、糊、締め付け具、突起部、または締まり嵌めなどの適切な保持手段によってそこに保持される。図４および図５に示す構造上の選択肢では、各閉鎖端部２３、３３はそれぞれのカバーを組み込んでいるが、これは例えばダクトの形成とともに単一部片として射出成形することによって、または重ね射出成形することによって、例えばガスダクト２０、３０、４０のそれぞれの本体の残りの部分との単一部片として画定される。   In the structural option of the present invention, as shown in FIG. 3, the inner wall portion of the hollow body 10 defines a cover portion in which the closed ends 23, 33 of the gas ducts 20, 30, 40 are fixedly fitted. The cover portion is held there by suitable holding means such as glue, clamps, protrusions or interference fits. In the structural options shown in FIGS. 4 and 5, each closed end 23, 33 incorporates a respective cover, which may be injection molded as a single piece, for example, together with the formation of a duct, or overlaid. By injection molding, it is defined as a single piece with the rest of the body of each of the gas ducts 20, 30, 40, for example.

本発明の他の構造上の選択肢では、ガスダクト２０、３０、４０は、隣接する閉鎖端部２３、３３を閉鎖するカバーを担持し、固定する。   In another structural option of the present invention, the gas ducts 20, 30, 40 carry and secure a cover that closes the adjacent closed ends 23, 33.

本発明によると、閉鎖端部２３、３３は、それぞれのガスダクト２０、３０、４０の最小音響圧力の結節領域に画定された開口部を通過するガス流れの方向によって交差される平面に画定され、上記開口部の位置決めは、図６に示しているように、最小音響圧力の点で圧力が受け取られるようにして、所定周波数帯域で大きな音響減衰を作り出す。   According to the present invention, the closed ends 23, 33 are defined in a plane intersected by the direction of gas flow through the opening defined in the nodal region of the minimum acoustic pressure of the respective gas duct 20, 30, 40, The positioning of the opening creates a large acoustic attenuation in a predetermined frequency band so that the pressure is received at the point of minimum acoustic pressure, as shown in FIG.

他の構造上の選択肢では、閉鎖端部２３、３３は、第１、第２、第３のガスダクト２０、３０、４０のうちの１つの上記開口部２１、３１、２２、３２、４２のうちの第１の開口部を通過するガス流れの方向と平行な平面に画定され、上記開口部の位置決めも、図６に示しているように、最小音響圧力の点で圧力が受け取られるようにして、所定周波数帯域で大きな音響減衰を作り出す。   In other structural options, the closed ends 23, 33 are of the openings 21, 31, 22, 32, 42 of one of the first, second, third gas ducts 20, 30, 40. The opening is positioned in a plane parallel to the direction of gas flow through the first opening, so that the positioning of the opening is such that pressure is received at the point of minimum acoustic pressure, as shown in FIG. Creates a large acoustic attenuation in a given frequency band.

本発明の特定の態様を、便宜のみのために、各図面の図に示しているが、本発明によって各態様を他の態様に組み合わせることもできる。他の実施形態も可能なものとして当業者によって認識され、これらも本請求項の範囲に含まれるべきである。したがって、上述の説明は、本発明の保護範囲を限定するものではなく、例示するものとして解釈されるべきである。このような全ての自明の修正形態および代替形態は、ここに添付する請求項で画定される保護範囲内に見出されるものである。   Although specific aspects of the invention are shown in the drawings for convenience only, each aspect may be combined with other aspects according to the invention. Other embodiments will be recognized by those skilled in the art as possible and should be included within the scope of the claims. Therefore, the above description should not be construed as limiting, but should be construed as illustrative. All such obvious modifications and alternatives are to be found within the protection scope defined by the claims appended hereto.

サクションマフラを担持するコンプレッサの概略部分縦断面図である。It is a general | schematic fragmentary longitudinal cross-section of the compressor which carries a suction muffler. 本発明にしたがって構築されたサクションマフラの概略部分横断上面図であって、サクションマフラのガス入口ダクトとガス出口ダクトを担持する減衰チャンバを有している。FIG. 2 is a schematic partial cross-sectional top view of a suction muffler constructed in accordance with the present invention, having a damping chamber carrying a gas inlet duct and a gas outlet duct of the suction muffler. 図２の線ＩＩＩ−ＩＩＩによる、本発明のサクションマフラの構造の概略縦断面図であって、サクションマフラのガス入口ダクトを担持する減衰チャンバを有している。FIG. 3 is a schematic longitudinal sectional view of the structure of the suction muffler of the present invention, taken along line III-III in FIG. 2, with a damping chamber carrying a gas inlet duct of the suction muffler. 図２の線ＩＶ−ＩＶによる、本発明のサクションマフラの別の概略縦断面図であって、サクションマフラのガス出口ダクトを示している。FIG. 4 is another schematic longitudinal cross-sectional view of the suction muffler of the present invention, taken along line IV-IV in FIG. 2, showing the gas outlet duct of the suction muffler. 本発明のサクションマフラの別の構造の概略縦断面図であって、サクションマフラのガス入口ダクトとガス出口ダクトとをそれぞれが担持する２つの減衰チャンバを有している。It is a schematic longitudinal cross-sectional view of another structure of the suction muffler of this invention, Comprising: It has two attenuation | damping chambers which each carry the gas inlet duct and gas outlet duct of a suction muffler. 従来技術（実線）によるマフラの構造と、本発明による構造（破線）とによって得られた、周波数２ｋＨｚに対する減衰曲線を示す概略的グラフである。It is a schematic graph which shows the attenuation curve with respect to frequency 2kHz obtained by the structure of the muffler by a prior art (solid line), and the structure (broken line) by this invention.

Claims (12)

外殻（１）内に取り付けられた冷却コンプレッサ用のサクションマフラであって、減衰チャンバ（１３、１４）に対して外部の入口開口部（２１）と、減衰チャンバ（１３、１４）の内部にある出口開口部（２２）とを有するガス入口ダクト（２０）、ならびに減衰チャンバ（１３、１４）の内部にある入口開口部（３１）と、前記減衰チャンバ（１３、１４）に対して外部の出口開口部（３２）とを有するガス出口ダクト（３０）を担持する少なくとも１つの減衰チャンバ（１３、１４）を画定する中空本体（１０）とを備えるサクションマフラであって、ガス入口ダクトおよびガス出口ダクト（２０、３０）の少なくとも一方が少なくとも１つの閉鎖端部（２３、３３）を有し、入口および出口開口部（２１、２２、３１、３２）の１つが、それぞれのダクト（２０、３０）に沿って、前記開口部の同じダクト（２０、３０）の他方の開口部に対する距離よりも小さい一定の距離を前記閉鎖端部（２３、３３）から置いて、所定の周波数に対して最小の音響圧力を生じる同じダクト（２０、３０）の領域に位置決めされ、前記ダクト（２０、３０）の寸法と前記開口部（２１、３１、２２、３２）の第１の開口部の断面の寸法とが、サクションマフラの内側のガス振動ノイズを最小限に抑えるように決めれられていることを特徴とする、サクションマフラ。   A suction muffler for a cooling compressor mounted in an outer shell (1), which has an inlet opening (21) external to the damping chamber (13, 14) and an inside of the damping chamber (13, 14). A gas inlet duct (20) having an outlet opening (22), as well as an inlet opening (31) inside the damping chamber (13, 14) and external to the damping chamber (13, 14) A suction muffler comprising a hollow body (10) defining at least one damping chamber (13, 14) carrying a gas outlet duct (30) having an outlet opening (32), the gas inlet duct and the gas At least one of the outlet ducts (20, 30) has at least one closed end (23, 33), one of the inlet and outlet openings (21, 22, 31, 32) Along the respective ducts (20, 30), a certain distance from the closed end (23, 33) is placed which is smaller than the distance of the opening to the other opening of the same duct (20, 30). Positioned in the area of the same duct (20, 30) producing the smallest acoustic pressure for a given frequency, the dimensions of the duct (20, 30) and the first of the openings (21, 31, 22, 32) 1. A suction muffler characterized in that the dimension of the cross section of the opening of 1 is determined so as to minimize gas vibration noise inside the suction muffler. ガス入口ダクト（２０）が、その入口開口部（２１）を、コンプレッサが結合された冷却システムのサクションラインに連結させていることを特徴とする、請求項１に記載のサクションマフラ。   Suction muffler according to claim 1, characterized in that the gas inlet duct (20) connects its inlet opening (21) to the suction line of the cooling system to which the compressor is coupled. ガス出口ダクト（３０）が、その出口開口部（３２）を、コンプレッサの弁板（７）に設けられた吸込みオリフィス（７ａ）と流体連通させていることを特徴とする、請求項１または２に記載のサクションマフラ。   3. A gas outlet duct (30), characterized in that its outlet opening (32) is in fluid communication with a suction orifice (7a) provided in the valve plate (7) of the compressor. The suction muffler described in 1. ガス出口ダクト（３０）の出口開口部（３２）が、前記他方の減衰チャンバ（１４）の内部に通じる入口開口部（４１）と、吸込みオリフィス（７ａ）に連結された出口開口部（４２）とを有する別のガス出口ダクト（４０）を有する別の減衰チャンバ（１４）を介して吸込みオリフィス（７ａ）と流体連通するように維持されることを特徴とする、請求項３に記載のサクションマフラ。   The outlet opening (32) of the gas outlet duct (30) is connected to the inlet opening (41) leading to the inside of the other damping chamber (14) and the suction orifice (7a). 4. Suction according to claim 3, characterized in that it is maintained in fluid communication with the suction orifice (7a) via another damping chamber (14) having another gas outlet duct (40) having Muffler. 他方の減衰チャンバ（１４）のガス入口およびガス出口ダクト（３０、４０）の少なくとも一方が、少なくとも１つの閉鎖端部（３３）を有し、入口および出口開口部（３１、４１、３２、４２）のうちの１つが、それぞれのダクト（３０、４０）に沿って、前記開口部の同じダクト（３０、４０）の他方の開口部に対する距離よりも小さい一定の距離を前記閉鎖端部（３３）から置いて、所定の周波数に対して最小の音響圧力を生じる同じダクト（３０、４０）の領域に位置決めされ、前記ダクト（３０、４０）の寸法と前記開口部（３１、４１、３２、４２）の第１の開口部の断面の寸法とが、サクションマフラの内部のガス振動ノイズを最小限に抑えるように決められていることを特徴とする、請求項４に記載のサクションマフラ。   At least one of the gas inlet and gas outlet ducts (30, 40) of the other damping chamber (14) has at least one closed end (33), and the inlet and outlet openings (31, 41, 32, 42). ) Have a constant distance along the respective duct (30, 40) less than the distance of the opening to the other opening of the same duct (30, 40). ) And positioned in the region of the same duct (30, 40) that produces the smallest acoustic pressure for a given frequency, the dimensions of the duct (30, 40) and the opening (31, 41, 32, The suction muffler according to claim 4, characterized in that the dimension of the cross section of the first opening of (42) is determined so as to minimize gas vibration noise inside the suction muffler. 閉鎖端部（２３、３３）が、前記最小音響圧力の領域を支配している同じガス圧力を受けることを特徴とする、請求項１から５のいずれか一項に記載のサクションマフラ。   Suction muffler according to any one of the preceding claims, characterized in that the closed end (23, 33) is subjected to the same gas pressure governing the region of minimum acoustic pressure. 前記開口部（２１、３１、４１、２２、３２、４２）のうちの第１の開口部の中間線とガスダクト（２０、３０、４０）の閉鎖端部（２３、３３）との距離が、前記開口部（２１、３１、４１、２２、３２、４２）の直径の半分よりも大きいことを特徴とする、請求項６に記載のサクションマフラ。   Of the openings (21, 31, 41, 22, 32, 42), the distance between the intermediate line of the first opening and the closed end (23, 33) of the gas duct (20, 30, 40) is Suction muffler according to claim 6, characterized in that it is larger than half the diameter of the opening (21, 31, 41, 22, 32, 42). 閉鎖端部（２３、３３）が、ガスダクト（２０、３０、４０）の前記開口部（２１、３１、４１、２２、３２、４２）の第１の開口部を通過するガス流れの方向によって交差される平面に画定されることを特徴とする、請求項７に記載のサクションマフラ。   The closed end (23, 33) intersects with the direction of gas flow through the first opening (21, 31, 41, 22, 32, 42) of the opening (21, 31, 41, 22, 32, 42) of the gas duct (20, 30, 40). The suction muffler according to claim 7, wherein the suction muffler is defined by a flat surface. 閉鎖端部（２３、３３）が、ガスダクト（２０、３０、４０）の前記開口部（２１、３１、４１、２２、３２、４２）の第１の開口部を通過するガス流れの方向と平行の平面に画定されることを特徴とする、請求項８に記載のサクションマフラ。   The closed end (23, 33) is parallel to the direction of gas flow through the first opening of the opening (21, 31, 41, 22, 32, 42) of the gas duct (20, 30, 40). The suction muffler according to claim 8, wherein the suction muffler is defined in a plane. 少なくとも１つの閉鎖端部（２３、３３）が、中空本体（１０）の壁部分によって画定されることを特徴とする、請求項１から９のいずれか一項に記載のサクションマフラ。   Suction muffler according to any one of the preceding claims, characterized in that at least one closed end (23, 33) is defined by a wall portion of the hollow body (10). 少なくとも１つの閉鎖端部（２３、３３）がカバーを担持することを特徴とする、請求項１から９のいずれか一項に記載のサクションマフラ。   Suction muffler according to any one of the preceding claims, characterized in that at least one closed end (23, 33) carries a cover. カバーが、それぞれの閉鎖端部（２３、３３）に組み込まれていることを特徴とする、請求項１１に記載のサクションマフラ。   Suction muffler according to claim 11, characterized in that a cover is incorporated in each closed end (23, 33).
JP2008509271A 2005-05-03 2006-05-02 Suction muffler for cooling compressor Pending JP2008540891A (en)

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BRPI0501740-8A BRPI0501740A (en) 2005-05-03 2005-05-03 refrigeration compressor suction filter
PCT/BR2006/000085 WO2006116830A1 (en) 2005-05-03 2006-05-02 Suction muffler for a refrigeration compressor

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