WO2019119862A1 - 用于减振降噪的空调器底盘设计方法 - Google Patents
用于减振降噪的空调器底盘设计方法 Download PDFInfo
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- WO2019119862A1 WO2019119862A1 PCT/CN2018/102963 CN2018102963W WO2019119862A1 WO 2019119862 A1 WO2019119862 A1 WO 2019119862A1 CN 2018102963 W CN2018102963 W CN 2018102963W WO 2019119862 A1 WO2019119862 A1 WO 2019119862A1
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- air conditioner
- conditioner chassis
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- 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
- F24F13/32—Supports for air-conditioning, air-humidification or ventilation units
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- 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
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- 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
- F24F2013/247—Active noise-suppression
Definitions
- the invention belongs to the technical field of vibration damping and noise reduction of air conditioners, and particularly relates to a design method of an air conditioner chassis for vibration and noise reduction.
- Vibration and noise testing is one of the must-have items for the factory test of air-conditioning products. It is not difficult to meet the performance requirements of air-conditioning products during the R&D test, but how to reduce the vibration and noise of air-conditioning products to improve customer comfort has always been a problem.
- the traditional design method of the air conditioner chassis is usually that the designer regularly arranges a few sheet metal according to experience (the sheet metal designed by the designer is generally horizontal and vertical). Due to the experience-based design, the randomness of this design method is relatively large, and the test results are good or bad.
- the way to reduce vibration and noise is mainly to control the vibration source and reduce the vibration amplitude on the propagation path.
- the vibration of the sheet metal member is mainly reduced by arranging the reinforcing ribs on the sheet metal member. The designer arranges the ribs of the sheet metal piece according to experience, and it is very likely that the area with a large vibration amplitude is staggered, so that vibration and noise cannot be effectively reduced.
- the present invention proposes a method for reducing vibration loss.
- the air conditioner chassis design method comprises the following steps: determining a installation position of a vibration source on an air conditioner chassis; determining a transmission mode of the vibration source on the air conditioner chassis; according to the installation position And a reinforcing rib is arranged on the air conditioner chassis.
- the step of "determining the transmission mode of the vibration source on the air conditioner chassis” specifically includes: performing finite element modal analysis on the air conditioner chassis to obtain a finite element mode State analysis results; based on the finite element modal analysis results, determine the transmission mode of the vibration source on the air conditioner chassis.
- the step of “arranging the reinforcing ribs on the air conditioner chassis according to the installation position and the transmission manner” specifically includes: optimizing the shape of the air conditioner chassis The analysis obtains the shape optimization analysis result; and the reinforcing rib is arranged on the air conditioner chassis based on the topography optimization analysis result.
- the method further includes: performing finite element modal analysis on the air conditioner chassis again to obtain a finite element mode The analysis result is determined; based on the finite element modal analysis result, the area of the air conditioner chassis having a large vibration amplitude is determined; and the rib is arranged in the area where the vibration amplitude is large.
- the method further includes: after the ribs of the air conditioner chassis are all arranged, verifying vibration of the air conditioner chassis; if the inspection result is expected If required, the arrangement of the ribs of the air conditioner chassis is recorded; otherwise, the arrangement of the ribs of the air conditioner chassis is adjusted.
- the step of "checking the vibration condition of the air conditioner chassis” specifically includes: arranging measurement points on the air conditioner chassis; recording the air conditioner chassis a vibration amplitude at the measurement point; determining whether the vibration condition of the air conditioner chassis meets an expected requirement according to the vibration amplitude value.
- the air conditioner chassis is used for an embedded air conditioner.
- the air conditioner chassis is used for a duct air conditioner.
- the vibration source is a fan motor of the air conditioner.
- the invention Compared with the existing designer's experience in arranging the ribs on the air conditioner chassis according to the experience, the invention reasonably arranges the position of the rib according to the installation position and the transmission mode of the vibration source, thereby avoiding the designer to arrange the air conditioner chassis only by experience.
- the vibration-damping and noise-reducing effect caused by the ribs on the upper side is good and bad, thereby effectively reducing the vibration of the air conditioner chassis.
- the arrangement of the ribs of the air conditioner chassis can meet the expected requirements (ie, the vibration reduction and noise reduction effect is obvious)
- the arrangement of the ribs of the air conditioner chassis is recorded, and the above-mentioned reinforcement can be directly applied to the same air conditioner chassis.
- the arrangement of the ribs conveniently and quickly lays out the position of the ribs on the same air conditioner chassis, further reducing the number of tests and greatly reducing the research and development costs.
- FIG. 1 is a schematic flow chart of a method for designing an air conditioner chassis for vibration and noise reduction according to the present invention
- 2A is an air conditioner chassis structure before the reinforcing ribs are arranged in an embodiment of the present invention
- 2B is an air conditioner chassis structure after the reinforcing ribs are arranged in an embodiment of the present invention
- Figure 3A is an arrangement of a conventional reinforcing rib in another embodiment of the present invention.
- Fig. 3B is an air conditioner chassis structure after the reinforcing ribs are arranged in another embodiment of the present invention.
- FIG. 1 is a schematic flow chart of a method for designing an air conditioner chassis for vibration and noise reduction according to the present invention.
- the method of the present invention includes the following steps: S110, determining a mounting position of a vibration source on an air conditioner chassis; S120, determining a transmission mode of the vibration source on the air conditioner chassis; S130, according to a vibration source installation position And the transfer method is arranged on the air conditioner chassis.
- the present invention reasonably arranges the position of the rib according to the installation position and the transmission mode of the vibration source, thereby effectively reducing the vibration of the air conditioner chassis.
- steps S110-S130 of the present invention will be described in detail below with reference to FIGS. 2A and 2B as an example of an air conditioner chassis for an embedded air conditioner.
- Figure 2A is an air conditioner chassis structure prior to placement of stiffeners in an embodiment of the present invention.
- the air conditioner chassis design method of the present invention when designing the air conditioner chassis shown in FIG. 2A, the first step is performed by the method shown in FIG. 1 to determine the vibration source (in this embodiment, the vibration source is the air conditioner of the air conditioner).
- the motor is mounted at the mounting position S of the air conditioner chassis; then step S120 is performed to determine the mode of transmission of the vibration source on the air conditioner chassis.
- the finite element modal analysis of the air conditioner chassis is used to determine the transmission mode of the vibration source on the air conditioner chassis.
- the transmission mode of the vibration source can be judged by observing the specific condition of the first 6-order mode.
- the vibration source excitation is transmitted from the middle to the periphery.
- the mounting position S is taken as the origin, and the reinforcing ribs are arranged on the air conditioner chassis in the form of radiation, thereby increasing the rigidity of the chassis and achieving the purpose of vibration reduction and noise reduction.
- the rib is arranged on the air conditioner chassis by performing shape optimization analysis on the air conditioner chassis, and then based on the result of the topography optimization analysis.
- the finite element modal analysis is performed on the air conditioner chassis with the ribs arranged again, and the finite element modal analysis results are obtained.
- the vibration amplitude on the air conditioner chassis is determined. A larger area is then further placed in the area where the vibration amplitude is larger.
- Fig. 2B is an air conditioner chassis structure after the reinforcing ribs are arranged in an embodiment of the present invention.
- M is a rib arranged on the air conditioner chassis based on the topography optimization analysis; and N is a rib further arranged on a region where the vibration amplitude is large on the air conditioner chassis.
- the invention finds the transmission form of the vibration of the air conditioner chassis, thereby reasonably arranging the position of the reinforcement rib, thereby avoiding the designer's experience alone.
- the effect of damping and noise reduction caused by the ribs on the air conditioner chassis is good and bad.
- the method of the present invention further includes inspecting the vibration of the air conditioner chassis after the ribs of the air conditioner chassis are all arranged. Specifically, first, a measurement point is arranged on the air conditioner chassis, and then the vibration amplitude at the measurement point is recorded, and based on the vibration amplitude value, it is judged whether the vibration condition of the air conditioner chassis reaches the expected requirement. If the test result does not meet the expected requirements, the arrangement of the ribs of the air conditioner chassis is adjusted (for example, the finite element modal analysis can be performed again); if the test result meets the expected requirements, the arrangement of the ribs of the air conditioner chassis is recorded.
- the above-mentioned rib arrangement can be directly applied, and the position of the ribs can be conveniently and quickly arranged on the same air conditioner chassis, thereby effectively reducing the vibration and noise of the air conditioner chassis, and reducing The number of trials has greatly reduced the cost of research and development.
- FIG. 3A is an arrangement of a conventional rib in another embodiment of the present invention.
- the air conditioner chassis is used for the air duct air conditioner.
- the traditional method of vibration reduction and noise reduction is usually arranged by the designer according to the structure of the product, the position of the vibration source, and the connection mode.
- some reinforcing ribs are arranged in the axial direction. This arrangement can have a certain damping effect in one direction, but the effect in the other two directions is not obvious.
- the structural strength of the panel is correspondingly reduced.
- the vibration source is first determined.
- the vibration source is distributed along the axial direction, so the axial vibration is relatively severe, in order to reduce the bending deformation of the air conditioner chassis.
- some of the stiffeners are stepped along the axial direction (as in the conventional arrangement of Figure 1).
- the finite element modal analysis of the air conditioner chassis is carried out to obtain the finite element modal analysis results.
- the region with large vibration amplitude on the air conditioner chassis is determined, and then the vibration amplitude is large.
- the area is further arranged with reinforcing ribs. Referring to FIG. 3B, FIG.
- 3B is an air conditioner chassis structure after the reinforcing ribs are disposed in another embodiment of the present invention. As shown in FIG. 3B, the axial rib M1 and the radial rib N1 are alternately arranged at a position where the vibration is large. Then, after the ribs of the air conditioner chassis are completely arranged, the vibration of the air conditioner chassis is checked. For details, please refer to the above, and details are not described herein.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Air Conditioning Control Device (AREA)
- Air Filters, Heat-Exchange Apparatuses, And Housings Of Air-Conditioning Units (AREA)
Abstract
一种用于减振降噪的空调器底盘设计方法，包括下列步骤：确定振源在空调器底盘上的安装位置(S110)；确定振源在所述空调器底盘上的传递方式(S120)；根据所述安装位置和所述传递方式在所述空调器底盘上布置加强筋(S130)。根据振源的安装位置和传递方式合理地布置加强筋的位置，避免了设计人员仅靠经验来布置空调器底盘上的加强筋而导致的减振降噪效果时好时坏的现象，从而有效地降低了空调器底盘的振动。
Description
本发明属于空调器减振降噪技术领域，具体涉及一种用于减振降噪的空调器底盘设计方法。
振动和噪音测试是空调产品出厂试验的必检项目之一。在研发试验过程中，满足空调产品的性能要求并不困难，但是如何降低空调产品的振动和噪音以提高客户的舒适度一直是个难题。目前，为了减振降噪的目的，空调器底盘的传统设计方式通常是设计人员根据经验，规则地布置几条钣金(设计人员布置的钣金一般是横平竖直的形式)。由于是以经验为主的设计，因而会导致这种设计方式的随机性比较大，试验效果也是时好时坏。
另一方面，对于正在研发中的空调产品，降低振动和噪音的方式主要是控制振源和降低传播途经上的振动幅值。在振源相同的条件下，主要是通过在钣金件上布置加强筋的方式降低钣金件的振动。设计人员根据经验布置钣金件的加强筋，很有可能会错开振动幅值较大的区域，这样就无法有效地降低振动和噪音。
因此，本领域需要一种新的方法来解决上述问题。
发明内容
为了解决现有技术中的上述问题，即为了解决设计人员根据经验在钣金件上布置加强筋的方式无法有效降低空调器底盘振动和噪音的问题，本发明提出了一种用于减振降噪的空调器底盘设计方法，所述空调器底盘设计方法包括下列步骤：确定振源在空调器底盘上的安装位置；确定振源在所述空调器底盘上的传递方式；根据所述安装位置和所述传递方式在所述空调器底盘上布置加强筋。
在上述空调器底盘设计方法的优选实施方式中，“确定振源在所述空调器底盘上的传递方式”的步骤具体包括：对所述空调器 底盘进行有限元模态分析，获取有限元模态分析结果；基于有限元模态分析结果，确定振源在所述空调器底盘上的传递方式。
在上述空调器底盘设计方法的优选实施方式中，“根据所述安装位置和所述传递方式在所述空调器底盘上布置加强筋”的步骤具体包括：对所述空调器底盘进行形貌优化分析，获取形貌优化分析结果；基于所述形貌优化分析结果在所述空调器底盘上布置加强筋。
在上述空调器底盘设计方法的优选实施方式中，在所述空调器底盘上布置加强筋之后，所述方法还包括：对所述空调器底盘再次进行有限元模态分析，获取有限元模态分析结果；基于上述有限元模态分析结果，确定所述空调器底盘上振动幅值较大的区域；在所述振动幅值较大的区域布置加强筋。
在上述空调器底盘设计方法的优选实施方式中，所述方法还包括：在所述空调器底盘的加强筋全部布置完成之后，对所述空调器底盘的振动情况进行检验；如果检验结果达到预期要求，则记录所述空调器底盘的加强筋的布置方式；否则，对所述空调器底盘的加强筋的布置方式进行调整。
在上述空调器底盘设计方法的优选实施方式中，“对所述空调器底盘的振动情况进行检验”的步骤具体包括：在所述空调器底盘上布置测量点；记录所述空调器底盘上的所述测量点处的振动幅值；根据所述振动幅值判断所述空调器底盘的振动情况是否达到预期要求。
在上述空调器底盘设计方法的优选实施方式中，所述空调器底盘用于嵌入式空调器。
在上述空调器底盘设计方法的优选实施方式中，所述空调器底盘用于风管机空调器。
在上述空调器底盘设计方法的优选实施方式中，所述振源是所述空调器的风机电机。
相对于现有设计人员根据经验在空调器底盘上布置加强筋的方式，本发明根据振源的安装位置和传递方式合理地布置加强筋的位置，避免了设计人员仅靠经验来布置空调器底盘上的加强筋而导致的减振降噪效果时好时坏的现象，从而有效地降低了空调器底盘的振动。此外，当空调器底盘的加强筋的布置方式能够达到预期要求(即 减振降噪效果明显)，则记录空调器底盘的加强筋的布置方式，针对相同的空调器底盘，可以直接套用上述加强筋的布置方式，方便快捷地在相同的空调器底盘上布置加强筋的位置，进一步减少了试验的次数，极大地节约了研发成本。
图1是本发明的用于减振降噪的空调器底盘设计方法的流程示意图；
图2A是本发明的一种实施例中布置加强筋之前的空调器底盘结构；
图2B是本发明的一种实施例中布置加强筋之后的空调器底盘结构；
图3A是本发明的另一种实施例中传统加强筋的布置方式；
图3B是本发明的另一种实施例中布置加强筋之后的空调器底盘结构。
为使本发明的实施例目的、技术方案和优点更加明显，下面将结合附图对本发明的技术方案进行清楚、完整地描述，显然，所述描述的实施例是本发明的一部分实施例，而不是全部实施例。本领域技术人员应当理解的是，这些实施方式仅仅用于解释本发明的技术原理，并非旨在限制本发明的保护范围。
参照图1，图1是本发明的用于减振降噪的空调器底盘设计方法的流程示意图。如图1所示，本发明的方法包括以下步骤：S110、确定振源在空调器底盘上的安装位置；S120、确定振源在空调器底盘上的传递方式；S130、根据振源的安装位置和传递方式在空调器底盘上布置加强筋。相对于现有设计人员根据经验在空调器底盘上布置加强筋的方式，本发明根据振源的安装位置和传递方式合理地布置加强筋的位置，从而有效地降低了空调器底盘的振动。另一方面，由于设计人员仅靠经验布置空调器底盘上的加强筋，容易导致空调器底盘的 减振降噪效果出现时好时坏的现象，通过本发明的减振降噪方法能够有效避免上述情形。
作为一种示例，下面结合图2A和图2B以用于嵌入式空调器的空调器底盘为例，对本发明的步骤S110-S130进行详细说明。
首先参照图2A，图2A是本发明的一种实施例中布置加强筋之前的空调器底盘结构。按照本发明的空调器底盘设计方法对图2A所示的空调器底盘进行设计时，首先通过图1所示的方法执行步骤S110，确定振源(本实施例中，振源为空调器的风机电机)在该空调器底盘上的安装位置S；然后执行步骤S120，确定振源在该空调器底盘上的传递方式。具体是通过对空调器底盘进行有限元模态分析来确定振源在空调器底盘上的传递方式。通常情况下，在有限元模态分析中，通过观察前6阶振型的具体情况即可判断振源的传动方式。在本实施例中，振源激励由中间向周围传递。基于此，为了减少空调器底盘的弯曲变形，在步骤S130中，以安装位置S为原点，按照辐射的形式在空调器底盘上布置加强筋，从而增加底盘刚度，达到减振降噪的目的。
在一种具体的实施方式中，在步骤S130中，通过对空调器底盘进行形貌优化分析，然后基于形貌优化分析的结果在空调器底盘上布置加强筋。在空调器底盘布置加强筋之后，对已布置加强筋的空调器底盘再次进行有限元模态分析，获取有限元模态分析结果，基于有限元模态分析结果，确定空调器底盘上振动幅值较大的区域，然后在振动幅值较大的区域进一步布置加强筋。参照图2B，图2B是本发明的一种实施例中布置加强筋之后的空调器底盘结构。按照本发明的方法在空调器底盘上布置加强筋后如图2B所示。其中，M为基于形貌优化分析在空调器底盘上布置的加强筋；N为在空调器底盘上振动幅值较大的区域进一步布置的加强筋。
如上所述，本发明根据振源的安装位置S，并结合有限元模态分析的方法，找到空调器底盘振动的传递形式，从而合理地布置加强筋的位置，避免了设计人员仅靠经验来布置空调器底盘上的加强筋而导致的减振降噪效果时好时坏的现象。
本发明的方法还包括：在空调器底盘的加强筋全部布置完成之后，对空调器底盘的振动情况进行检验。具体地，首先在空调器 底盘上布置测量点，然后记录该测量点处的振动幅值，根据该振动幅值判断空调器底盘的振动情况是否达到预期要求。如果检验结果未达到预期要求，则对空调器底盘的加强筋的布置方式进行调整(例如可以再次进行有限元模态分析)；如果检验结果达到预期要求，则记录空调器底盘的加强筋的布置方式，针对相同的空调器底盘，可以直接套用上述加强筋的布置方式，方便快捷地在相同的空调器底盘上布置加强筋的位置，从而有效地降低了空调器底盘的振动和噪音，并且减少了试验的次数，极大地节约了研发成本。
此外，相对于现有设计人员仅依靠经验的过度复杂的布置方式，他能够更本发明的方法在空调器底盘上形成的加强筋的布置方式更简洁，从而能够减少了空调器底盘的制造成本。而且，通过本发明的方法得到的加强筋的布置方式是固定的，这样避免了设计人员盲目地布置空调器底盘上的加强筋，从而出现试验效果时好时坏的随机现象，减少了试验次数，极大地节约了研发成本。
作为另一种示例，首先参照图3A，图3A是本发明的另一种实施例中传统加强筋的布置方式。图示中空调器底盘用于风管机空调器，对于风管机空调器的空调器底盘，传统减振降噪的方式通常由设计人员根据产品的结构、振源的位置和连接方式进行布置，如图3A所示，在轴向布置一些加强筋，这种布置方式在一个方向上能起到有一定的减振效果，但是在另外两个方向上起到的效果不明显。另外，增加加强筋尺寸的同时，相应地减弱了面板的结构强度。
按照本发明的方法对该空调器底盘布置加强筋时，首先确定振源，在本实施例中，振源沿轴向分布，故轴向的振动比较剧烈，为了减少空调器底盘的弯曲变形，首先沿轴向步骤一些加强筋(如图1中的传统布置方式)。然后对该空调器底盘进行有限元模态分析，获取有限元模态分析结果，基于有限元模态分析结果，确定空调器底盘上振动幅值较大的区域，然后在振动幅值较大的区域进一步布置加强筋。参照图3B，图3B是本发明的另一种实施例中布置加强筋之后的空调器底盘结构。如图3B所示，在振动较大的位置进行轴向筋M1和径向筋N1交替布置。然后在空调器底盘的加强筋全部布置完成之后，对空调器底盘的振动情况进行检验，具体请参见上文，在此不再赘述。
至此，已经结合附图所示的优选实施方式描述了本发明的技术方案，但是，本领域技术人员容易理解的是，本发明的保护范围显然不局限于这些具体实施方式。在不偏离本发明的原理的前提下，本领域技术人员可以对相关技术特征作出等同的更改或替换，这些更改或替换之后的技术方案都将落入本发明的保护范围之内。
Claims (9)
- 一种用于减振降噪的空调器底盘设计方法，其特征在于，所述方法包括下列步骤：确定振源在空调器底盘上的安装位置；确定振源在所述空调器底盘上的传递方式；根据所述安装位置和所述传递方式在所述空调器底盘上布置加强筋。
- 根据权利要求1所述的空调器底盘设计方法，其特征在于，“确定振源在所述空调器底盘上的传递方式”的步骤具体包括：对所述空调器底盘进行有限元模态分析，获取有限元模态分析结果；基于有限元模态分析结果，确定振源在所述空调器底盘上的传递方式。
- 根据权利要求2所述的空调器底盘设计方法，其特征在于，“根据所述安装位置和所述传递方式在所述空调器底盘上布置加强筋”的步骤具体包括：对所述空调器底盘进行形貌优化分析，获取形貌优化分析结果；基于所述形貌优化分析结果在所述空调器底盘上布置加强筋。
- 根据权利要求3所述的空调器底盘设计方法，其特征在于，在所述空调器底盘上布置加强筋之后，所述方法还包括：对所述空调器底盘再次进行有限元模态分析，获取有限元模态分析结果；基于上述有限元模态分析结果，确定所述空调器底盘上振动幅值较大的区域；在所述振动幅值较大的区域布置加强筋。
- 根据权利要求4所述的空调器底盘设计方法，其特征在于，所述方法还包括：在所述空调器底盘的加强筋全部布置完成之后，对所述空调器底盘的振动情况进行检验；如果检验结果达到预期要求，则记录所述空调器底盘的加强筋的布置方式；否则，对所述空调器底盘的加强筋的布置方式进行调整。
- 根据权利要求5所述的空调器底盘设计方法，其特征在于，“对所述空调器底盘的振动情况进行检验”的步骤具体包括：在所述空调器底盘上布置测量点；记录所述空调器底盘上的所述测量点处的振动幅值；根据所述振动幅值判断所述空调器底盘的振动情况是否达到预期要求。
- 根据权利要求1至6中任一项所述的空调器底盘设计方法，其特征在于，所述空调器底盘用于嵌入式空调器。
- 根据权利要求1至6中任一项所述的空调器底盘设计方法，其特征在于，所述空调器底盘用于风管机空调器。
- 根据权利要求1至6中任一项所述的空调器底盘设计方法，其特征在于，所述振源是所述空调器的风机电机。
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