1. Introduction of Industrial Washing Machine:
In recent years, industrial washing equipment has been dominated by water washing equipment in particular, and the application of frequency converters has become more and more popular. The frequency converter has therefore brought a new technological revolution to industrial washing equipment, from the earliest non-adjustable semi-automatic washing machines to use. Two double-speed motors are used to realize a four-speed fully automatic washing machine, and finally developed into a modern washing machine that can realize multiple speeds with only one motor.
Industrial washing machines require the inverter to provide high torque, multi-speed, wide voltage range, automatic slip compensation and convenient communication methods; stable performance, can adapt to the high temperature and high humidity environment of various hotels and hotel laundry rooms; inverter Suppliers can provide timely and perfect services. In short, the inverter is required to adapt to the specific washing process requirements of industrial washing machines and the service requirements of specific customer groups.
2. Working process:
The washing process of the fully automatic washing machine is as follows:
First, add water and wash in forward and reverse directions for 25 minutes. After washing, drain and enter the dehydration stage. The dehydration stage includes three processes: uniform distribution, medium removal and high removal. Even distribution is in the presence and absence of water. Rotate forward at a higher speed than the washing process for 1.5 minutes to make the clothes evenly adhere to the inside of the drum of the washing machine to make the subsequent dehydration process stable; after draining, increase the speed to enter the medium-speed dehydration process (2 minutes), and then enter The high-speed dehydration process (5 minutes) reduces the moisture content of the laundry to the required level.
3. Control principle:
There are two ways to set the speed:
1) Set the running speed of each stage directly on the inverter in a multi-stage speed mode;
2) Set the running speed of each stage through the communication computer through the dedicated control computer of the washing machine.
The electrical wiring schematic diagram of the industrial washing machine is as follows. The inverter requires the ALPHLA 6000 high-performance vector inverter. This inverter has excellent performance such as large starting torque, smooth operation, and perfect fault protection measures.
The industrial washing machine will frequently rotate forward and reverse when it is working. When the frequency conversion control system is adopted, it can meet the following requirements:
â—Ž Large starting torque
â—Ž Stable speed throughout
â—Ž No stall during acceleration and deceleration
â—Ž Wide speed range
â—Ž When the second water is added, the load reaches the maximum value, and the low-frequency torque output meets the requirements
ALPHA6000 type inverter not only has special V / F curve automatic lifting function, but also optimizes the V / F curve according to actual needs in each link of washing. It has a unique powerful multi-speed function (8-speed). In industrial washing machines, the V / F curve is generally required as follows:
In the picture:
a, A represents the lowest voltage and lowest frequency
b, B stands for intermediate voltage and intermediate frequency
c, C represents the highest voltage and basic operating frequency
The point (A, a) can be at the origin. The range of A is approximately between 0 and 4 Hz, and the range of a is approximately between 0 and 25 V. Adjusting point (A, a) can affect the starting torque of the equipment and thus affect the equipment. Washing speed. If the point (A, a) moves down, the starting frequency of the device is low, the washing machine starts slowly and smoothly, and the low-frequency starting torque of the inverter is required to be large.
The adjustment of points (B, b) directly affects the running current of the equipment during washing, which is a very important point. If the slope between points (A, a) and (B, b) is large, that is, the slope of the V / F curve is steep, the operating current will be large, but the slope is too slow, and it needs to be adjusted according to experience.
Take the 100kg washing machine as an example:
(A, a) point: 2HZ, 24V
(B, b) point: 25HZ, 112V
(C, c) point: 50HZ, 380V
Four, use effect:
After testing on a 100kg washing machine, the data are as follows:
The above data was obtained through repeated experiments. During the period of continuous operation for four hours, there was no abnormal accident, and the temperature rise of the inverter was very small. In addition, similar conclusions are drawn on the 30kg, 50kg, and 70kg models. It can be seen that the ALPHA6000 inverter is indeed a high-quality inverter suitable for use in washing equipment
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