I. Introduction

 

Industrial washing machines are electrical equipment used in hotels, guesthouses, laundries or factories to wash large quantities of clothes. The washing process generally consists of water intake, washing forward rotation, pause, washing reverse rotation, drainage and dehydration. With the rapid development of automation and the continuous improvement of industrial process requirements, industrial washing machines have higher and higher requirements for inverters, which can meet the requirements of high starting torque, multi-speed, wide voltage range, automatic slip compensation and fast speed. Powerful communication methods, etc. Moreover, it has stable performance and can adapt to various complex high temperature and high humidity environments.

 

2. Composition and working principle of fully automatic industrial washing machine

 

A fully automatic industrial washing machine refers to a large-capacity washing machine that has the functions of initial washing, washing, rinsing, bleaching and dehydration, and without manual operation between functions, which can realize automatic conversion. Industrial washing machines can be divided into suspension type, water injection balance type, and gravity fixed type according to different ways of damping and damping. At present, the mainstream products on the market are suspension type fully automatic industrial washing machines. It is mainly composed of housing, frame panel, drum in the main shaft, transmission system, anti-vibration system, front door parts, feeding parts, brake parts, drain valve parts, super vibration parts, control parts, pipeline parts and pneumatic systems.

 

The working principle of the fully automatic industrial washing machine is: under the unified scheduling management of the timing controller, the asynchronous motor is controlled by the inverter to continuously perform forward and reverse rotation to realize the asynchronous movement of water and clothing, so that water and clothing can rub against each other , Knead to achieve the purpose of washing. It mainly has the following washing procedures:

 

First of all, add water, wash in forward and reverse rotation for 25 minutes. After washing, drain water and enter the dehydration stage. The dehydration stage includes three processes of uniform distribution, medium removal and high removal. Uniform distribution means that there is water and no water. Rotate forward for 1.5 minutes at a higher speed than the washing process to make the clothes evenly adhere to the inside of the drum of the washing machine to make the subsequent dehydration process smooth; 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 clothes to the required level.

 

There are two ways to set the speed:

 

1) In a multi-stage speed mode, directly set the running speed of each stage on the inverter;

 

2) Through the special control computer of the washing machine, the operating speed of each stage is set by communication. The operating speed of each stage is: Washing: around 7HZ, uniform distribution: around 15HZ, medium release: 80HZ, high release: 110HZ

 

Third, the advantages of using easy-drive GT210 inverter

 

1. Large starting torque, normal starting at full load;

 

2. High, medium and low speeds in the whole process, stable speed;

 

3. No stall or no flow during acceleration and deceleration;

 

4. Wide speed range;

 

5. Large low-frequency torque meets the 7HZ washing process;

 

6. The parameter setting is simple, the default V/F can meet the production needs;

 

7. Install protective cover, with strong environmental adaptability;

 

6.concluding remarks

 

Easydrive GT210 inverter has been successfully applied in the field of industrial washing machines. After a period of customer use verification, its superior performance (large low-frequency torque, wide speed range, high steady-state accuracy, flexible and convenient operation, and full functional protection) and The high reliability has been well received by customers and fully meets the needs of the industrial washing machine industry.