Electronic scale capable of quantitatively adding liquid and method for quantitatively adding liquid

Abstract

The invention discloses an electronic scale capable of quantitatively adding liquid. The electronic scale capable of quantitatively adding the liquid comprises a tray. A weight sensor is connected with the tray and arranged below the tray. The weight sensor is connected with an operating circuit board through a shielded wire. The operating circuit board controls an electromagnetic valve to be opened and closed. The operating circuit board comprises a microprocessor. Output signals of the weight sensor are transmitted to an amplifier through a sampling circuit. After the output signals are processed through the amplifier, the output signals are input the microprocessor through an analog to digital (A/D) transition circuit. The microprocessor controls the electromagnetic valve to be opened and closed through a valve control circuit. According to the electronic scale capable of quantitatively adding the liquid, accurate and automatic filling of air conditioner refrigerants can be achieved, and a price is more reasonable. Further disclosed is a method for quantitatively adding the liquid. The electronic scale is adopted in the method for quantitatively adding the liquid.

Description

technical field [0001] The invention relates to an electronic balance, in particular to an electronic balance capable of quantitatively adding liquid. Background technique [0002] Before a new air conditioner leaves the factory, it is usually necessary to add a certain amount of refrigeration oil and refrigerant to the interior of the air conditioner. If manual filling is used, it is very time-consuming and laborious, and the weight of the filling is not easy to control; if the refrigerant recovery and filling machine is used for filling, the production cost of the manufacturer will be increased, and the purchase of the refrigerant recovery and filling machine alone is worthless. Fei's cost. [0003] However, the functions of existing electronic scales are relatively single, and generally can only be used to measure the weight of objects, without the function of quantitatively adding liquid. Contents of the invention [0004] The technical problem to be solved by the p...

AI Technical Summary

Problems solved by technology

If manual filling is used, it is very time-consuming and laborious, and the weight of the filling is not easy to control; if the refrigerant recovery and filling machine is used for filling, the production cost of the manufacturer will be increased, and the purchase of the refrigerant recovery and filling machine alone is worthless. Fee's cost

[0003] However, the functions of the existing electronic scales are relatively single, and generally can only be used to measure the weight of objects, without the function of quantitatively adding liquid

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