A soft ice cream machine with frequency conversion control function

Abstract

The invention discloses a soft ice cream machine with frequency conversion control function: it includes a power interface, a first frequency conversion controller, a stirring motor, a stirring device, a refrigeration motor and a refrigeration compressor, the power supply interface is connected to the first frequency conversion controller, the first The frequency conversion output of the frequency conversion controller controls the stirring motor. The stirring motor is a three-phase squirrel-cage asynchronous motor. The power output of the stirring motor drives the stirring device, and provides power for the refrigeration motor through the power interface, and the power output of the refrigeration motor drives the refrigeration compressor. The invention provides a soft ice cream machine with frequency conversion drive function, which has low noise when the cake body is stirred, is convenient for speed regulation, has a stable starting torque, high efficiency, and can make the cake body adhere evenly.

Description

technical field [0001] The invention relates to a food machine, in particular to an ice cream machine. Background technique [0002] The soft ice cream machine mainly includes a power device, a stirring device and a refrigeration device, and the power device is used to provide power for the stirring device and the refrigeration device of the soft ice cream machine. At present, most of the soft ice cream machines used in the market use single-phase power as the power supply, and the motors that output power generally use single-phase dual-value capacitor asynchronous motors (such as YL90S4-1.1KW). Such as figure 1 As shown, it is an internal wiring method of a single-phase double-value capacitor asynchronous motor, including a main winding Z1Z2, an auxiliary winding U1U2, a starting capacitor C1 (150uF / 275V), and a running capacitor C2 (35uF / 400V) And a centrifugal switch V1V2, one end of the main winding and the auxiliary winding are connected in parallel, the other end of...

AI Technical Summary

Problems solved by technology

However, in the soft ice cream machine, the motor using this power device has the following disadvantages: 1. Due to the defects in the manufacturing process of this type of motor; as the rotating shaft of the motor will intermittently shake up and down along the radial direction, it is easy to generate a magnetic gap , the current is large and the noise is large when working, and it is difficult to start and stop frequently when making cakes

2. Especially when the powder-slurry mixture is made into a cake shape, due to the large current, the contacts of the centrifugal switch of the motor are easily damaged by arc ablation, causing the starting capacitor and running capacitor to be burned, resulting in damage to the motor

3. Due to the high speed of the single-phase motor, the unbalanced load torque, the low energy efficiency of the motor, and the inability to adjust the speed, this will cause the colloid in the mixed slurry to be easily crushed, so that the adhesion of the finished cake body is not enough, and the adhesion is broken. layers, the cake body does not hold enough time for forming, and the appearance is not beautiful

4. Since the drive of the traditional refrigeration compressor uses a fixed-speed compressor to start under full pressure, the current is very large, usually reaching 4-6 times the rated operating current, which will have a great impact on the power grid circuit where it is located

In addition, single-phase motors have high noise, low work efficiency, and high power consumption per unit output.

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