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
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WIPO (PCT)
Prior art keywords
muffler
outer tube
air conditioner
pulsation
inner tube
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.)
Ceased
Application number
PCT/CN2007/001692
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English (en)
French (fr)
Inventor
Weixiong LIANG
Zhanshan Li
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.)
Gree Electric Appliances Inc of Zhuhai
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/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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)

Description

空调用脉动消声器 技术领域
本发明涉及消声减振器领域， 尤其涉及一种空调用脉动消声器。 背景技术
空调用消声器是为了解决空调在运行的过程中所产生的噪音， 现有的消声 器可分为： 阻性消声器、 对抗性消声器和阻抗复合型消声器。 对抗性消声器， 它是利用管道截面突变，造成声阻抗的失配使声传播能量减小；其次是利用消 声器腔体内界面的反射， 即让声波在一定长度 ( 1/4波长) 的空间内， 来回反 射， 把声能转化成机械能和热能耗散， 从而达到降噪目的。该类型消声器只能 对某些频率成分起消声作用，当噪声峰值波长大于腔体长度五倍时， 消声器将 失去作用。 因而要改进消声器性能， 一般采用两种方法：
( 1 ) 扩张室消声器进口插入内接管， 插入长度取扩张室长度的 1/4 (扩 张室长度为 1/4噪声峰值波长）。 这种结构的消声器的特点是： 消声品质因数 高， 但降噪带宽窄， 稳定性差。它的消声原理其实是把噪声峰值能量转化为机 械能， 达到降噪目的。 因此消声器前部的管路振动和压力都会变大， 在管路的 强度不足时， 会明显表现出来。
(2) 用多节不同长度的扩张室串联,使它们的通过频率互相错开,以达到 宽频带的降噪。 考虑成本及安装问题， 不宜在空调上应用。 发明内容
本发明要解决的技术问题， 在于针对现有技术的上述缺陷， 提供一种消声 器， 此消声器的体积小、 降噪稳定。
本发明是通过以下技术方案来实现的： 一种空调用脉动消声器， 包括消声 器外管， 该消声器外管所围成的空间为消声腔； 消声器外管上带有外管进口、 外管出口；在消声腔内设有消声器内管，消声器内管前端与外管进口连接相通， 在消声器内管的管壁上设有多个通孔。
在本发明的空调用脉动消声器中， 所述消声器内管的后端封闭。
在本发明的空调用脉动消声器中，所述消声腔前端直径大，在靠近后端处 直径逐渐缩小， 形成炮弹形。
在本发明的空调用脉动消声器中，所述消声腔靠近后端处直径逐渐缩小而 使消声器外管的后端形成向内凹的弧面。
在本发明的空调用脉动消声器中，所述消声腔的容积为 30至 45立方厘米。 在本发明的空调用脉动消声器中，所述多个通孔的总面积大于所述消声器 内管的截面积。
在本发明的空调用脉动消声器中，所述多个通孔在所述消声器内管的管壁 上均匀分散设置。
在本发明的空调用脉动消声器中，至少有一个所述通孔设于所述消声器内 管靠近所述外管进口处。
在本发明的空调用脉动消声器中，在所述消声器外管靠近外管出口处的管 壁上设有凹口。
综上， 本发明的优点是-
1、 能够对宽频率的噪声进行消声， 稳定性强；
2、 消声器尺寸小， 安装、 生产方便；
3、 炮弹形的消声腔结构消声效果好； 4、 消声器内管上靠近外管进口处的通孔保证消声器的回油。 附图说明
图 1是本发明脉动消声器的剖视图；
图 2是空调系统使用普通消声器时的频谱图；
图 3是同一空调系统使用本发明的脉动消声器时的频谱图。 具体实施方式
请参见图 1， 一种空调用脉动消声器， 包括消声器外管 1， 该消声器外管 1 所围成的空间为消声腔 2， 消声腔 2的容积为 36立方厘米； 该消声腔 2前端 直径大，在靠近后端处直径逐渐缩小，而使消声器外管 1的后端形成向内凹的 圆弧面， 且整个消声器外管 1前端大后端小形成倒置的炮弹形； 消声器外管 1 上带有外管进口 3、 外管出口 4; 在消声腔 2内设有消声器内管 5， 消声器内 管 5前端与外管进口 3连接相通。在消声器内管 5的管壁上均匀分散的设有多 个通孔 6，且至少有一个通孔 6设于消声器内管 5靠近外管进口 3处的管壁上， 消声器内管 5的后端封闭； 多个通孔 6的总面积大于消声器内管 5的截面积。 消声器外管 1靠近外管出口的管壁上设有两个凹口 7。
本发明中， 脉动气流 （噪声）从消声器外管 1前端的外管进口进入消声器 内管 5， 从通孔 6内传出， 在消声腔 2内来回反射， 而把难以解决的低频脉动 气流 （噪声） 转化成容易解决的高频脉动气流 （噪声）， 而克服了原消声器对 不同频率的噪声的消声效果不稳定的缺陷。即先转化噪声的频率，再进行消声， 此为本发明与已有结构的最大不同。 同时， 此结构可采用小尺寸的消声器， 避 免消声器尺寸过大带来的难题。 本发明的进一步改进是： 所述消声器内管 5的后端封闭。 要控制脉动气流 从消声器内管 5后端的流出量， 可以采用多种结构， 如： 减小消声器后端的直 径， 或在消声器后端设置一个小直径的通孔。而将消声器内管 5后端封闭， 可 避免大部分脉动气流从消声器内管 5的后端流出， 也可方便加工。
消声腔 2前端直径大， 在靠近后端处直径逐渐缩小， 形成炮弹形。 从通孔 6喷出来的强劲流柱， 射向四周， 然后混合在炮弹形状的消声腔 2中。 炮弹形. 的消声腔 2可以减小涡流， 同时对射流再进行了高频滤波，而达到最终的消声 目的。
消声腔 2靠近后端处直径逐渐缩小而使消声器外管 1的后端形成向内凹的 圆弧面。 从通孔 6中喷射出来的流柱混合后， 经内凹的圆弧面柔顺过渡流出， 使流体脉动减小， 从而减弱管路振动和低频噪声， 以提高降噪的效果。
所述消声器外管 1所围成的消声腔的容积为 30至 45立方厘米。本发明以 空调消声为目的， 经过多次试验计算， 制冷量 12000W以下的家用空调， 理想 的消声腔容积为 32至 42立方厘米的范围， 考虑实际加工、装配的互换性， 将 消声器的容积限定在容积为 30至 45立方厘米的范围。
通孔 6的总面积大于所述消声器内管 5的截面积。 此结构主要是为了以保 证消声器内管 5中的质量流。且通孔 6在所述消声器内管 5的管壁上均勾分散 设置， 以保证从消声器内管 5射出的脉动气流的流速及频率尽量均勾统一。
至少有一个所述通孔 6设于所述消声器内管 5靠近所述外管进口 3处。通 过此通孔可保证消声器的回油。
在消声器外管 1靠近外管出口 4处的管壁上设有凹口 7， 对插入的连接管 起到定位作用。
将本实施例在带有 AWA5530EGH型号压縮机的一个空调系统上进行试验 对比（请见图 2、 图 3)， 由以上频谱对比可以看出： 使用普通消声器时， 噪声 峰值为 50.4dB/2.00E- 5Pa， 使用本实施例时， 噪声峰值为 41.5dB/2.00E-5Pa。 即使用本实施例时， 能够将高频脉动气流（噪声）进行消声， 同时也能将低频 脉动气流 （噪声） 进行消声， 提高消声的稳定性， 消声效果好。

Claims

权利要求书
、 空调用脉动消声器， 包括消声器外管 （1 )， 其特征在于： 该消声器外管
( 1 )所围成的空间为消声腔（2);消声器外管（1 )上带有外管进口（3)、 外管出口 （4); 在消声腔（2) 内设有消声器内管（5)， 消声器内管（5) 前端与外管进口 （3)连接相通， 在消声器内管 （5) 的管壁上设有多个 通孔（6)。
、 如权利要求 1所述的空调用脉动消声器， 其特征在于： 所述消声器内管
(5) 的后端封闭。
、 如权利要求 2所述的空调用脉动消声器， 其特征在于： 所述消声腔 （2) 前端直径大， 在靠近后端处直径逐渐缩小， 形成炮弹形。
、 如权利要求 3所述的空调用脉动消声器， 其特征在于： 所述消声腔 （2) 靠近后端处直径逐渐缩小而使消声器外管（1 )的后端形成向内凹的弧面。 、 如权利要求 1-4中任一项所述的空调用脉动消声器， 其特征在于： 所述 消声腔（2) 的容积为 30至 45立方厘米。
、 如权利要求 1-4中任一项所述的空调用脉动消声器， 其特征在于： 所述 多个通孔 （6) 的总面积大于所述消声器内管 （5) 的截面积。
、 如权利要求 1-4中任一项所述的空调用脉动消声器， 其特征在于： 所述 多个通孔（6) 在所述消声器内管 （5) 的管壁上均勾分散设置。
、 如权利要求 1-4中任一项所述的空调用脉动消声器， 其特征在于： 至少 有一个所述通孔 （6) 设于所述消声器内管 （5)靠近所述外管进口 （3) 处。
、 如权利要求 1-4中任一项所述的空调用脉动消声器， 其特征在于： 在所 述消声器外管 （1 )靠近外管出口 （4) 处的管壁上设有凹口 （7)。
PCT/CN2007/001692 2006-07-25 2007-05-24 Atténuateur d'impulsions pour climatiseur Ceased WO2008014659A1 (fr)

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

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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

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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

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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