Breaking the innovation of refrigerators | 'Thinking barriers' | Upstream and downstream linkages promote industry development

On October 31, the 2018 China Household Appliance Technology Conference-Fridge/Freezer Professional Technology Branch was held in Ningbo. The conference attracted about 200 people from relevant upstream and downstream organizations, enterprises, and research institutes to sign up for the refrigerator industry. Expertise, standard regulations, future trends, upgrade directions, etc. have been deeply exchanged.

Inverter refrigerator ushered in explosive growth

In October 2016, with the upgrade of China's refrigerator energy efficiency standards, China's inverter refrigerator industry ushered in explosive growth. Industry online data shows that domestic household inverter refrigerators increased by 74% in 2016 compared with 2016. The industry will regard 2017 as the inverter refrigerator. The year of product explosion, and 2018 is the year in which the inverter refrigerator is inspected by the market.

Refrigerator frequency conversion technology has become the standard of more and more manufacturers. However, seemingly simple frequency conversion technology requires strong technical support and system integration. Embraco project development director Evandro Francisco Gon pointed out that the frequency conversion technology is 'soft and hard 'Combined refrigerator overall system solution, 'hard' represents the compressor, frequency conversion board, complete machine and other hardware, 'soft' is the perfect combination of hardware and system, and the perfect execution of the program control program. Only guarantee the refrigerator' The perfect match between soft and hard technology can achieve excellent product performance.

In the Chinese market, the inverter frequency conversion technology is still very young. The explosive growth of frequency conversion products not only brings opportunities to the industry, but also challenges, such as the energy efficiency improvement bottleneck of inverter compressors, the batch risk of frequency conversion board quality problems, etc. The energy efficiency improvement, noise reduction, food preservation performance and stability of the technology can be brought about by technology. The household inverter refrigerator will continue to grow in China, and the industrial upgrading must be based on technological innovation and quality assurance. In the process of development, you can't be lucky, and there are no shortcuts to follow.

To improve the inverter frequency conversion technology, the perfect match between the compressor and the system is essential. At the meeting, Embraco proposed the inverter compressor 'Double Cool Refrigeration Solution', which realized through the new compressor and refrigeration system solution. The advantages of the evaporator system are maximized, which combines the refrigeration capacity of the refrigerator, energy efficiency, cost control, and brings the system control to a new level, providing a 'core' power for the inverter refrigerator to achieve better performance.

Do not forget the truth, explore new developments in preservation technology

At the meeting, Dr. Wang Haiyan from Hisense (Shandong) Refrigerator Co., Ltd. made a review report on the development of refrigerator preservation technology. She pointed out that the essence of food corruption is the result of the growth and reproduction of bacteria and other foods acting on food; The mechanism of food is to inhibit microbial reactions through physical, chemical, biological and other factors, prolong food preservation, storage period.

Among them, the physical factors affecting the growth and reproduction of microorganisms mainly include temperature, ultraviolet light, pulsed electric field, ionizing radiation, etc.; chemical factors include moisture, humidity, oxygen environment, etc., while biological factors include symbiosis, antagonism, etc. The factors combine to produce inhibition and induction.

By understanding these essential mechanisms, we can make progress in the preservation of food materials by taking advantage of the situation. 'For example, quick-cooling, quick-freezing technology is to maintain temperature by adjusting temperature; water-ion technology is to keep fresh by humidity; and antibacterial materials can inhibit microbial growth; ultraviolet, plasma has In addition, there are vacuum preservation, nitrogen preservation, catalyst adsorption and preservation, etc. According to different ingredients, these technologies can be selectively used.

At the meeting, Wang Haiyan introduced the current 7 major preservation technologies in the mainstream of the industry.

Taking zero-degree preservation as an example, using precise temperature control technology, the temperature of the compartment can be infinitely close to 0 °C but not lower than 0 °C, keeping the food neither freezing nor maintaining the lowest temperature above freezing, and maximally inhibiting bacteria. Breeding and nutrient loss, more suitable for the preservation of meat, seafood and fruits and vegetables, to ensure the freshness and nutrition of the ingredients. In this respect, Siemens home appliances as the forerunner of the industry, after years of exploration and technical iteration, maintain advanced technology.

In addition, vacuum preservation is another popular technology trend in recent years. The vacuum pump is used to extract the air in the confined space, so that the food is in a low-pressure, low-oxygen environment, reducing food oxidation and blocking secondary pollution. In this field, Siemens Home Appliances and Hitachi own Mature technology. At this year's IFA show, there are already Turkish brands, which are applied to the entire refrigerator door to realize the differentiated application of technology.

In recent years, catalyst technology has been applied on a large scale, using catalysts to stimulate the activity of air molecules, producing reduction reactions, decomposing ripening gases, and highlighting the removal of odor and effective antibacterial. This technology has been widely used in Haier, Hisense, LG and other products. in.

Another example is ion preservation technology, which eliminates microorganisms by high-pressure discharge particles, and is suitable for rich preservation scenes, mainly for Japanese brands and domestic Hisense, Midea and other enterprises.

In addition, there are electrostatic field preservation technology, quick-freezing preservation technology and ice temperature preservation technology.

Wang Haiyan pointed out that refrigerators are home food management centers, and future technological advances in the refrigerator industry should focus on extending food freshness, food management, food nutrition, nutritional analysis, food safety and other steps. On this basis, whether it is partition storage, Intelligent, or other differentiated technology paths, are all right. 'The innovation of the refrigerator should return to the essence. I saw an Australian designer's tree-shaped refrigerator with 'trunk', 'twig' and 'fruit' The other parts, and the 'fruit' is the compartment for partition storage. Different 'fruits' can achieve different functions such as vacuuming, dryness preservation, humidity preservation, etc. If the food deteriorates, the 'fruit' will also change color. From the appearance it It's completely different from the refrigerator, but it's the same. There are five years ago when I saw the New Zealand designer's 'refrigerator wall', which is a honeycomb structure, which is also the concept of precise temperature control in the partition. In short, on the basis of not forgetting the truth, If you use your imagination, you will usher in a new era of refrigerator preservation technology.

At the meeting, Wang Haiyan also briefly reported on the IEC refrigerator fresh-keeping standard, "refrigerator fresh-keeping requirements and test methods", "refrigerator fresh meat preservation requirements and test methods", "fridge fresh-keeping technology evaluation norms" and other standards. .

Refrigerator lying and transport requirements have rules to follow

When it comes to standards, I have to mention the special requirements for the storage and transportation of refrigerators in this session. The 'requirements' is a group standard set by the China Household Electrical Appliances Association on the improvement technology of refrigerators. The standard working group member unit, Fei Bin of Qingdao Haier Co., Ltd. analyzed the standard.

Fei Bin pointed out that in 2016, the country introduced a policy of over-limitation of vehicles. For refrigerator enterprises that are mainly based on double-layered vertical transportation, transportation costs have increased, and many home appliance companies have begun to perform horizontal transportation. In shipping container transportation, Using a high-rise cabinet to lay a layer on the upper floor can increase the amount of packing, and the average cost per transport is reduced by 25%. Under this circumstance, the refrigerator is a new transportation trend, and the industry is in urgent need of unified horizontal discharge implementation standards, reducing the cause. Product failure caused by irregular placement.

In July 2017, led by the Household Appliances Association, each refrigerator and compressor company participated in the establishment of this standard. After the project was initiated, the standard working group divided the development process into seven major stages, and the previous four stages were completed. Complete standard text and technical manuals.

Within the framework of this standard, the working group's ability to protect the package under high temperature and high humidity transportation and storage environment, the falling condition of the lying surface during the horizontal and horizontal transportation process, the random vibration close to the actual transportation situation, and the horizontal transportation and packaging And the protection ability of the interior packaging, the upper part of the clamping side when loading and unloading, the lower part and the operation of clamping the top surface and the bottom surface, the falling process during loading and unloading, the impact when the brake is placed, and the height of about 1.8m during the unloading process. The loading and unloading truck is placed in the horizontal direction, the direction of the flipping, the pressure in the lying state, the pedaling, and the necessary stepping operation when the worker carries out the tarpaulin operation and unloading on the product, and the reliability of the transporting press under the lying state is carried out. A large number of simulation tests. Eliminate the faults that occur during the test, propose reasonable improvement plans, determine the position of the rotating plate, load the high plate, single or double-layer loading, multi-row loading sequence, laying protective cardboard, The optimized operation specification during the unloading process provides the best basis for the horizontal release of the refrigerator product.

It is reported that the standard is expected to be officially implemented during the year.

In addition to the above speeches, this session also invited upstream materials from Hegang New Materials, Wanlang Magnetics, Bailin Chemical, Gao Zhouxin Materials, VAI Precision Strip, Fujian Scitech New Materials, etc. Trend, refrigerator door seal, activated carbon filter, valve plate, valve plate, vacuum insulation board related technology and application to share. Also invited Professor Yu Jianlin from Xi'an Jiaotong University to 'air-cooled refrigerator heat exchanger frosting And the progress of defrosting research was introduced, and excellent papers from companies and organizations such as Hisense, Bosi Home Appliances, Midea, Meizhi, China Household Electrical Appliances Research Institute were also introduced at the meeting.