A Method for Indirect Measurement of Spring Stiffness and Mover Mass of Linear Compressor

Abstract

The invention discloses a method for indirectly measuring spring rigidity of a linear compressor and mover mass. The method comprises the following steps: connecting acoustic load in an outlet of the compressor to pressurize the whole system; determining at least two groups of incompletely-equivalent acoustic impedance imaginary parts and angular frequency data under the condition that the acoustic impedance real parts of the acoustic load are ensured to be unchanged; combining resonance conditions of the compressor; and calculating to obtain the spring rigidity and the mover mass, wherein the angular frequency data is angular frequency corresponding to highest electro-acoustic conversion efficiency of the compressor. Compared with the prior art, the method has the beneficial effects that: on the premise of not disassembling the linear compressor, an indirect test is performed on the compressor, the test method is simple and easy to operate, and damages, caused by disassembling the compressor, to internal structural parts of the compressor are avoided.

Description

technical field [0001] The invention belongs to the field of linear compressors, and in particular relates to an indirect measurement method for the spring stiffness and the mass of a mover of a linear compressor. Background technique [0002] Due to the combination of key technologies such as linear motors, flexible leaf springs, and gap seals, linear compressors have a series of advantages such as long life, no friction, low vibration, low noise, and high reliability. They have been widely used in low-temperature refrigerators and refrigerators. . The linear compressor can be understood as composed of three major parts: the circuit part, the mechanical part and the acoustic load part. Among them, the mechanical part connects the circuit and the acoustic load, and plays the role of effectively converting electric power into sound power. The two key parameters of the mover mass and spring stiffness in the mechanical part directly affect the sound power output characteristi...

AI Technical Summary

Problems solved by technology

After the linear compressor has been running for a long time, due to some reasons, such as the change of the material properties of the leaf spring, the deflation of the insulating layer of the moving coil winding, etc., the spring stiffness and the mass of the mover change, which affects the output characteristics of the compressor.

If you need to measure these two parameters at this time, you need to disassemble the compressor, which is inconvenient

In addition, since the seal of the linear compressor relies on the micron-level gap between the piston and the cylinder, it also makes its assembly extremely difficult

And in some occasions, the lack of the above-mentioned measuring devices makes it difficult to obtain parameters

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