WO2008014659A1 - Atténuateur d'impulsions pour climatiseur - Google Patents

Atténuateur d'impulsions pour climatiseur Download PDF

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Publication number
WO2008014659A1
WO2008014659A1 PCT/CN2007/001692 CN2007001692W WO2008014659A1 WO 2008014659 A1 WO2008014659 A1 WO 2008014659A1 CN 2007001692 W CN2007001692 W CN 2007001692W WO 2008014659 A1 WO2008014659 A1 WO 2008014659A1
Authority
WO
WIPO (PCT)
Prior art keywords
muffler
outer tube
air conditioner
pulsation
inner tube
Prior art date
Application number
PCT/CN2007/001692
Other languages
English (en)
Chinese (zh)
Inventor
Weixiong LIANG
Zhanshan Li
Original Assignee
Gree Electric Appliances Inc. Of Zhuhai
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.)
Filing date
Publication date
Application filed by Gree Electric Appliances Inc. Of Zhuhai filed Critical Gree Electric Appliances Inc. Of Zhuhai
Publication of WO2008014659A1 publication Critical patent/WO2008014659A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/24—Means for preventing or suppressing noise

Definitions

  • the invention relates to the field of noise dampers, and in particular to a pulsation muffler for air conditioners. Background technique
  • the air conditioner muffler is used to solve the noise generated by the air conditioner during operation.
  • the existing muffler can be divided into: a resistive muffler, a confrontation muffler and an impedance composite muffler.
  • the antagonist muffler which utilizes the sudden change of the pipe section, causes the acoustic impedance mismatch to reduce the acoustic propagation energy; the second is to use the reflection of the interface inside the muffler cavity, that is, the sound wave is within a certain length (1/4 wavelength) space, Reflecting back and forth, converting sound energy into mechanical energy and heat energy dissipation, thereby achieving noise reduction.
  • This type of muffler can only silence some frequency components. When the noise peak wavelength is greater than five times the cavity length, the muffler will lose its effect. Therefore, to improve the performance of the muffler, two methods are generally used:
  • the inlet of the expansion chamber muffler is inserted into the inner tube, and the insertion length is taken as 1/4 of the length of the expansion chamber (the length of the expansion chamber is 1/4 noise peak wavelength).
  • the muffler of this structure is characterized by: high sound quality factor, but narrow noise reduction bandwidth and poor stability. Its muffling principle is actually to convert the peak energy of noise into mechanical energy to achieve the purpose of noise reduction. Therefore, the vibration and pressure of the pipe at the front of the muffler will become large, and it will be apparent when the strength of the pipe is insufficient.
  • the technical problem to be solved by the present invention is to provide an anti-sound for the above-mentioned defects of the prior art.
  • the muffler is small in size and stable in noise reduction.
  • a pulsation muffler for air conditioner comprising a muffler outer tube, the space enclosed by the outer tube of the muffler is a muffler cavity; the outer tube of the muffler has an outer tube inlet and an outer tube outlet; A muffler inner tube is arranged in the muffler chamber, and the front end of the inner tube of the muffler is connected with the inlet of the outer tube, and a plurality of through holes are arranged in the tube wall of the inner tube of the muffler.
  • the rear end of the inner tube of the muffler is closed.
  • the front end of the muffling chamber has a large diameter, and the diameter gradually decreases toward the rear end to form a bullet shape.
  • the diameter of the muffling chamber is gradually reduced near the rear end such that the rear end of the outer tube of the muffler forms an inwardly concave arc surface.
  • the volume of the muffling chamber is 30 to 45 cubic centimeters.
  • the total area of the plurality of through holes is larger than the sectional area of the inner tube of the muffler.
  • the plurality of through holes are uniformly dispersed on the pipe wall of the inner tube of the muffler.
  • At least one of the through holes is provided in the muffler inner tube near the outer tube inlet.
  • a notch is provided in the wall of the muffler outer tube near the outlet of the outer tube.
  • the size of the muffler is small, easy to install and produce
  • the sound-absorbing cavity structure of the shell-shaped structure has good sound-absorbing effect; 4.
  • the through hole on the inner tube of the muffler near the inlet of the outer tube ensures the oil return of the muffler.
  • Figure 1 is a cross-sectional view of the pulsation muffler of the present invention
  • Figure 2 is a spectrum diagram of an air conditioner system using a conventional muffler
  • Fig. 3 is a spectrogram of the same air conditioning system using the pulsation muffler of the present invention. Detailed ways
  • a pulsation muffler for an air conditioner includes a muffler outer tube 1 , and a space surrounded by the muffler outer tube 1 is a muffler chamber 2 , and the volume of the muffler chamber 2 is 36 cubic centimeters; the front end of the muffler chamber 2 has a large diameter , the diameter is gradually reduced near the rear end, and the rear end of the outer tube 1 of the muffler forms an inwardly concave arc surface, and the front end of the outer portion of the outer muffler 1 is small and has an inverted projectile shape; the outer tube 1 of the muffler The outer tube inlet 3 and the outer tube outlet 4 are provided; the muffler inner tube 5 is disposed in the muffler chamber 2, and the front end of the muffler inner tube 5 is connected to the outer tube inlet 3.
  • a plurality of through holes 6 are uniformly distributed on the pipe wall of the muffler inner tube 5, and at least one through hole 6 is provided on the wall of the muffler inner tube 5 near the outer tube inlet 3, behind the muffler inner tube 5.
  • the end is closed; the total area of the plurality of through holes 6 is larger than the cross-sectional area of the muffler inner tube 5.
  • the muffler outer tube 1 is provided with two recesses 7 on the wall of the tube near the outlet of the outer tube.
  • the pulsating air flow enters the muffler inner tube 5 from the outer tube inlet at the front end of the outer tube 1 of the muffler, passes through the through hole 6, and reflects back and forth in the muffler chamber 2, and the low frequency pulsating air flow which is difficult to solve (
  • the noise is converted into an easily solved high-frequency pulsating airflow (noise), which overcomes the defect that the original muffler has an unstable muffling effect on noise of different frequencies. That is, the frequency of the noise is first converted, and then the noise is silenced, which is the biggest difference between the present invention and the existing structure.
  • this structure can adopt a small-sized muffler to avoid the problem caused by the oversized size of the muffler.
  • a further improvement of the invention is that the rear end of the muffler inner tube 5 is closed.
  • various structures can be employed, such as: reducing the diameter of the rear end of the muffler, or providing a small diameter through hole at the rear end of the muffler.
  • the rear end of the muffler inner tube 5 is closed, so that most of the pulsating airflow can be prevented from flowing out from the rear end of the muffler inner tube 5, and the processing can be facilitated.
  • the anechoic chamber 2 has a large diameter at the front end and gradually decreases in diameter near the rear end to form a bullet shape.
  • a strong flow column ejected from the through hole 6 is directed to the periphery and then mixed in the muffler chamber 2 in the shape of a projectile.
  • the damper chamber 2 can reduce the eddy current, and at the same time, the jet is further filtered by high frequency to achieve the final noise reduction purpose.
  • the diameter of the muffler chamber 2 is gradually reduced near the rear end such that the rear end of the outer tube 1 of the muffler forms an inwardly concave circular arc surface. After the flow column ejected from the through hole 6 is mixed, the concave arc surface is smoothly transitioned out, so that the fluid pulsation is reduced, thereby weakening the pipeline vibration and the low frequency noise, thereby improving the noise reduction effect.
  • the muffler chamber surrounded by the muffler outer tube 1 has a volume of 30 to 45 cubic centimeters.
  • the invention aims at noise reduction of air conditioners, and after many tests and calculations, the household air conditioners with a cooling capacity of 12,000 W or less, the ideal muffling chamber volume is in the range of 32 to 42 cubic centimeters, considering the interchangeability of actual processing and assembly, the muffler is The volume is limited to a volume in the range of 30 to 45 cubic centimeters.
  • the total area of the through holes 6 is larger than the sectional area of the inner tube 5 of the muffler. This structure is primarily intended to ensure mass flow in the inner tube 5 of the muffler. And the through hole 6 is uniformly disposed on the wall of the inner tube 5 of the muffler to ensure that the flow velocity and frequency of the pulsating airflow emitted from the inner tube 5 of the muffler are as uniform as possible.
  • At least one of the through holes 6 is provided in the muffler inner tube 5 near the outer tube inlet 3.
  • the through hole ensures the return of the muffler.
  • a notch 7 is formed in the wall of the muffler outer tube 1 near the outlet 4 of the outer tube to position the inserted connecting tube.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust Silencers (AREA)

Abstract

Cette invention concerne un atténuateur d'impulsions pour un climatiseur. Cet atténuateur comprend un tuyau externe (1) atténuateur, l'espace défini par le tuyau externe (1) formant une cavité d'attenuation (2). Un orifice d'admission (3) de tuyau externe et un orifice d'échappement (4) de tuyau externe sont formés dans le tuyau externe (1) atténuateur. Un tuyau interne (5) atténuateur est installé dans la cavité d'atténuation (2). L'extrémité avant du tuyau interne (5) atténuateur est reliée de manière à communiquer avec l'orifice d'admission (3) du tuyau externe. Certains trous traversants (6) sont ménagés sur la paroi du tuyau interne (5)atténuateur.
PCT/CN2007/001692 2006-07-25 2007-05-24 Atténuateur d'impulsions pour climatiseur WO2008014659A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN200620062030.6 2006-07-25
CNU2006200620306U CN2926903Y (zh) 2006-07-25 2006-07-25 空调用脉动消声器

Publications (1)

Publication Number Publication Date
WO2008014659A1 true WO2008014659A1 (fr) 2008-02-07

Family

ID=38281151

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2007/001692 WO2008014659A1 (fr) 2006-07-25 2007-05-24 Atténuateur d'impulsions pour climatiseur

Country Status (2)

Country Link
CN (1) CN2926903Y (fr)
WO (1) WO2008014659A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102338257A (zh) * 2010-07-28 2012-02-01 新昌县铁牛金属制造有限公司 不锈钢消音器及其制造工艺

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103912754A (zh) * 2012-12-31 2014-07-09 海尔集团公司 一种消音器、制造方法及冷柜
CN104863861B (zh) * 2015-05-05 2017-03-08 陈金杰 一种用于螺杆式制冷机的脉动消音装置
CN107956673B (zh) * 2017-11-21 2019-03-22 浙江工贸职业技术学院 一种消音减振器
CN110762000A (zh) * 2018-07-26 2020-02-07 广东美的环境科技有限公司 增焓脉动衰减装置、涡旋压缩机及空调系统
CN109405317A (zh) * 2018-09-25 2019-03-01 青岛海尔空调电子有限公司 用于空调器的补气增焓管路系统

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN86104117A (zh) * 1986-11-27 1988-03-16 上海船用柴油机研究所 调频式排气稳流装置
CN2424299Y (zh) * 2000-01-11 2001-03-21 魏多山 汽车消声器

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN86104117A (zh) * 1986-11-27 1988-03-16 上海船用柴油机研究所 调频式排气稳流装置
CN2424299Y (zh) * 2000-01-11 2001-03-21 魏多山 汽车消声器

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102338257A (zh) * 2010-07-28 2012-02-01 新昌县铁牛金属制造有限公司 不锈钢消音器及其制造工艺

Also Published As

Publication number Publication date
CN2926903Y (zh) 2007-07-25

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