Wide-range air performance detection system and method for household electrical appliances

Abstract

The invention discloses a wide-range air performance detection system and method for household electrical appliances, and the system comprises an air performance measurement device, a first differential pressure transmitter, a second differential pressure transmitter, a third differential pressure transmitter, a first protection solenoid valve, a second protection solenoid valve, a first relay control circuit, a second relay control circuit, a barometric pressure transmitter, a temperature sensor, a six-channel A / D conversion digital display meter, an upper computer, a to-be-detected electric appliance, and a connecting pipe. The system employs three pressure transmitters with different ranges to be combined for measurement, employs a modification value line pair to achieve correction and modification, improves the accuracy of measurement, and enlarges the measurement range. A design that a diffusion segment can be replaced is employed, thereby achieving the detection of different household electrical appliances through one system, and reducing the cost of hardware. The system employs multi-point static pressure ports, and reduces the impact on a structure from the arrangement of a pressure-sharing grid.

Description

technical field [0001] The invention belongs to the technical category of air performance detection of household electrical appliances, and in particular relates to an air performance detection device system and method for free air intake and pipeline air outlet electrical products. Background technique [0002] Among household electrical appliances, some products are mainly used for the conversion of indoor or local flue gas, typical products such as range hoods, ventilation fans, etc. In recent years, integrated stoves, which are electrical appliances that integrate gas stoves or induction cookers, lower range hoods, disinfection cabinets and other kitchen appliances, have developed rapidly. At present, the annual output and sales volume of these electrical products in our country are very large. The annual sales volume of ventilation fans is about 100 million units, the sales volume of range hoods is about 10 million units, and the annual sales volume of integrated stove...

AI Technical Summary

Problems solved by technology

[0007] 2. The cost of equipment investment is too large

[0008] 3. The unreasonable setting of the pressure point leads to the deviation of the test results

Therefore, it is not enough to reflect the average static pressure on the inner surface of the decompression cylinder only through a single static pressure tapping hole, which will cause the test results to deviate from the true value

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