Noise testing method for air-cooled variable-frequency refrigerator

Abstract

The invention discloses a noise testing method for an air-cooled inverter refrigerator, and relates to the technical field of refrigerators. The method comprises the steps that parts capable of generating noise in the refrigerator are determined, and then the running time of a noise testing program is determined; a noise test program preparation stage; operation noise frequencies of the air door and the electric valve are obtained; operation noise values of a refrigeration fan and a condenser fan are obtained; obtaining an operation noise value of the compressor; the operation noise value during combined operation of the compressor, the refrigeration fan and the condenser fan is obtained; and ending the noise test of the refrigerator. By testing the noise values generated during operation of different parts in stages, various noises possibly generated during operation of the refrigerator can be quickly determined, so that a product is better guided to be improved, and the method has high market application value.

Description

technical field [0001] The invention belongs to the technical field of refrigerators, and in particular relates to a noise testing method of an air-cooled inverter refrigerator. Background technique [0002] In recent years, with the upgrading of refrigerator product structure and the advancement of frequency conversion technology, the market share of frequency conversion refrigerators is increasing, and frequency conversion products are gradually replacing the original fixed frequency refrigerators. In addition to energy saving and freshness preservation, the frequency conversion refrigerator is another main technical advantage of quietness. However, after various refrigerator manufacturers launched frequency conversion products, the number of noise complaints of some products was higher than that of traditional fixed frequency products. The main reasons were the following two aspects: 1) The frequency conversion compressor and frequency conversion fan use multiple speeds, ...

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Problems solved by technology

However, after various refrigerator manufacturers launched frequency conversion products, the number of noise complaints of some products was higher than that of traditional fixed frequency products. Large, there may be resonance at some rotational speeds; however, due to the impact of noise test efficiency and long test time, the design stage and production sampling test did not perform noise verification for all rotational speeds

2) During the use of the refrigerator, in addition to the steady-state noise, there are various unsteady-state noises generated by the operation noise of the damper, the operation noise of the electric valve, the startup noise of the compressor, the speed-up and speed-down of the compressor, and the compressor shutdown. Refrigerant backflow sound, etc., this kind of noise is not within the test range stipulated by the national standard, and each enterprise has not established a unified method for effective detection

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