Damping structure device capable of lowering resonance amplitude of compressor unit piping

Abstract

The invention discloses a damping structure device capable of lowering resonance amplitude of compressor unit piping, and relates to the technical field of air-conditioning compressor piping vibration reduction. According to the core technical scheme, the principle of increasing a damping effect theory is used, and one or more damping rubber pieces are connected between different piping of a compressor. Accordingly, the resonance amplitude of the compressor unit piping can be effectively lowered without a current compensation device, and the operation frequency range of the variable frequency compressor is greatly widened, energy loss is reduced, and the energy efficiency of an air-conditioner is improved. Meanwhile, the piping does not need to be in a specific shape in the space, piping design personnel can have large design play space in a limited space, the trial-and-error times of piping design and experiments can be reduced, experiment cost is lowered, and the time to market of products is shortened. The damping structure device capable of lowering resonance amplitude of the compressor unit piping is low in cost, convenient to use, capable of greatly shortening the construction time, improving the work efficiency, and having high practical and popularization value.

Description

technical field [0001] The invention relates to a related technical field of compressor piping vibration reduction, in particular to the vibration reduction of household air conditioner compressor piping, light commercial air conditioner compressor piping, and commercial air conditioner compressor piping. Background technique [0002] The piping vibration generated by air-conditioning compressors during transportation and operation is often the main cause of piping breakage. Among the above reasons, the resonance phenomenon generated when the excitation frequency of the external force is too close to the natural frequency of the piping leads to large amplitude and vibration of the piping. High stress situations are most severe. [0003] In order to reduce the vibration of the air conditioner compressor piping, in the prior art, there are mainly the following methods for piping vibration reduction: use the vibration damping element of the internal parts of the compressor (suc...

AI Technical Summary

Problems solved by technology

Due to the increase of the external mass of the piping, the piping stress will increase significantly under the transportation vibration; in addition, the high-frequency natural frequency of the original piping, under the action of the external mass, the intermediate frequency natural frequency of the new piping may also be close to the excitation frequency of the compressor; The fastening of multiple sets of piping is to strengthen the overall stiffness of the piping on the one hand and increase the natural frequency of the piping, but it lacks appropriate piping deflection, which is not conducive to the transportation safety of the compressor piping; in addition, under the piping resonance, its amplitude is still significant, It is unfavorable for the reliability of piping, and its shape is specific, which is also unfavorable for implementation

[0005] In the above methods, basically only the natural frequency of the piping is transferred to another frequency region, which increases the natural frequency density of this frequency region. For inverter compressors, it is a frequency region that should be avoided. Significantly limits the operating frequency range of the inverter compressor

The method of adding piping mass and increasing piping stiffness will also increase the natural frequency and modal transition of the medium and high frequency piping that are easy to be ignored, resulting in piping resonance when the inverter compressor is running at medium and high frequency

Especially in order to avoid close to the resonance frequency of the piping when the inverter compressor is running, the driving frequency code of the inverter compressor is pre-selected for different types of air-conditioning units based on past experience to keep away from the resonance frequency of the piping. However, due to the piping configuration of the system Space changes and changes in the use environment often lead to slight changes in the dynamic performance of the piping, thus re-changing the distribution of the resonance frequency of the piping, so that the original drive frequency of the inverter compressor is too close to the resonance frequency of the piping, resulting in abnormal Expected piping resonance, resulting in piping breakage under long-term operation

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