How to rectify the chaos of home appliance repair

How to rectify the chaos of home appliance repair The Ministry of Commerce promulgated the management method for appliance repair service industry this year. It requires that the staff of the maintenance company must undergo qualification training, and must not falsely list, exaggerate, or forge maintenance service items and contents, and clearly define the value-added service, maintenance process, and charges for home appliance accessories. standard. However, this method has been formally implemented so far, its own home appliance repair "black dot" or a lot.

Why did the management approach fail to cure the chaos of appliance maintenance? The author believes that the main lack of specific supporting measures. The relevant management measures establish the specifications of the appliance repair service industry and define what constitutes illegal acts. These are all necessary, but the accompanying technical operating rules need to be followed up in a timely manner, including how to implement and who will lead the operation. Specific supervision, and so on. To put it plainly, the management measures cannot only hope that the practitioners themselves will find their own conscience to be “so good,” but must adopt concrete and effective measures so that practitioners are not afraid to take risks and cut off the unscrupulous managers’ lives.

There is no lack of examples of government orders in the household appliance industry. The recent implementation of home appliances trade-in appliances and home appliances to the countryside have been successful. Manufacturers, sellers, and consumers have benefited from all three factors. The reason is due to the participation of relevant government departments and supporting policies. Introduced. Now, the home appliance repair service industry also needs this top-down “total mobilization”, especially the regular army of appliance repair service industry that is deeply affected by the “bad money drives out good money”, and it is also deeply concerned about the establishment of an orderly market. Hope.

"Black network points" make a living with fraud. What's bad is the reputation of the entire industry. It is the law-abiding regular army who suffers and affects the business. Moreover, “black network points” are not operated, and the regular military needs to spend a lot of energy and expenses on personnel, technology, logistics, and brand image. The cost is high, and the efficiency is often no match for “black network points”. In this situation, the normal service life of home appliance repair services is difficult. As a result, the results can only follow the trend, and they also lose momentum and the service level is hard to increase.

In order to clean up the source, the appliance repair service industry calls for management measures to be “landed” as soon as possible. In Shanghai, at least three things can be done at present. One is to improve and popularize the “door-to-door service permit” inquiry system. The Shanghai Electronic Product Maintenance Service Industry Association has established an on-site service permit inquiry system for consumers to check the identity of maintenance personnel. Such a system needs to be jointly promoted by the government and industry associations in order to achieve full coverage of the market; second is to strengthen special training for home appliance repair services to improve the qualification level of practitioners; third is to support the regular army, with positive pressure. Like Hualian Jiawei is the Shanghai Bailian Group’s home appliance service brand, it should encourage such brands to become bigger and stronger.

Policies must be implemented and effective implementation is a top priority. Only when the supporting measures are put in place as soon as possible, the management rights and responsibilities will be clarified as soon as possible, and the management measures of the appliance repair service industry can reflect the authority and rigidity of the law, escort the regular army of the industry, and eradicate the chaotic phenomenon of the appliance repair service industry.


The Co-Al Co-doped Barium Titanate Lead-free Piezoelectric Ceramics was successfully developed by Yuhai company through repeated experiments. By Researching the influence of Co-Al Co-doping on the structure and properties of Barium Titanate-based piezoelectric ceramics, the formulation and preparation technology of Barium Titanate-based piezoelectric ceramics were optimized. Yuhai`s BaTiO3 was prepared by conventional solid-phase sintering method, with the piezoelectric constant d33 (>170pC/N), dielectric loss tgδ≤0.5% and mechanical coupling coefficient  Kp≥0.34.

Barium titanate lead-free piezoelectric ceramics are important basic materials for the development of modern science and technology, which was widely used in the manufacture of ultrasonic transducers, underwater acoustic transducers, electroacoustic transducers, ceramic filters, ceramic transformers, ceramic frequency discriminators, high voltage generators, infrared detectors, surface acoustic wave devices, electro-optic devices, ignition and detonation devices, and piezoelectric gyroscope and so on.

Application:  military, ocean, fishery, scientific research, mine detection, daily life and other fields.

 

China Patent of Yuhai company`s BaTiO3

Chinese Patent No.: ZL 2011 1 0126758.6   

Name: Lead-free Barium Titanate Piezoelectric Material with Addition of Cobalt and Aluminum 

8



Lead free piezo material BaTiO3

Lead-free Material

Properties

 

 

BaTiO3

Dielectric Constant

ɛTr3

 

1260

Coupling factor

KP

 

0.34

 

K31

 

0.196

 

K33

 

0.43

 

Kt

 

0.32

Piezoelectric coefficient

d31

10-12m/v

-60

 

d33

10-12m/v

160

 

g31

10-3vm/n

-5.4

 

g33

10-3vm/n

14.3

Frequency coefficients

Np

 

3180

 

N1

 

2280

 

N3

 

 

 

Nt

 

2675

Elastic compliance coefficient

Se11

10-12m2/n

8.4

Machanical quality factor

Qm

 

1200

Dielectric loss factor

Tg δ

%

0.5

Density

ρ

g/cm3

5.6

Curie Temperature

Tc

°C

115

Young's modulus

YE11

<109N/m3

119

Poison Ratio

 

 

0.33

 


Lead Free Piezoelectric Elements

Piezo Element,Piezo Ceramic Elements,Piezoelectric Ceramic,Pzt Tubes

Zibo Yuhai Electronic Ceramic Co., Ltd. , https://www.yhpiezo.com