Troubleshooting of refrigerant leakage in test chamber
Teddy Bear plush toys, popular with girls, have a wide range of sales. The soft filler feels very comfortable. Its main materials are wool fabric and polypropylene cotton filler. There are four main types of plush fabrics. The first common yarn, Python material, can be divided into light, smooth, and can be divided into Yin and Yang direction. And matte gauze is matte color, basically without two faces of yin and yang. The second kind of yarn is called special yarn. It has plain wool cloth and long and short wool. Wool length should be controlled at 4-20 mm. The third kind is called wool, wool grows in the range of 20-120 mm, any wool can grow in the range of 20-45 mm, only 65 mm and 120 mm above 45 mm, belongs to long hair, wool is relatively straight, not easy to curl. The fourth is curly hair, which is granular hair, lambskin hair, or hair root is bundled, curly hair above. Polypropylene cotton, commonly known as baby cotton, hollow cotton, also known as cotton, chemical fiber man-made materials, polypropylene, polypropylene (plastic optical density, especially attention to polypropylene and polyester not confused) from the process difference: there are mainly hollow fibers and two kinds, the product has good high temperature resistance. Flexibility, smooth feeling.
Cloth introduction:
1.Yarn-dyed cloth: the structure of the silk thread is well
shaped. The appearance is similar to 5 pieces of satin and 8 pieces of satin.
The density is better than 5 pieces of satin and 8 pieces of satin.
Specifications are generally 75 * 100D, 75 * 150D and so on. The raw material
of tinted cloth: it can be cotton, blended or polyester, or pure chemical
fiber, which is formed by the different organization of the fabric. The product
that lubricious ding bu makes popularity is wide, glossiness drape feels good,
feel soft. Elastic colored butyl cloth "adopts polyester FDY dayou light
50D*DTY75D+ spandex 40D as the raw material, and USES satin weave weave in the
jet loom. Because the warp thread adopts dayou light silk, the cloth surface
has charm, and occupies a place in the recent fabric market with the advantages
of lightness, smoothness, elasticity, comfort and luster. Polyester low-elastic
silk is the raw material, the fabric structure USES satin plain grain to change
the texture, woven on the air jet loom, grey cloth and then after desizing,
pre-shrinking, softness and other treatment, the fabric permeability is
particularly good, and feel soft and smooth, fabric width is 150cm. Design and
color d set comfort, modern sense, artistic sense in one of the new fabrics
2. Non-woven fabrics: They are directional or random fibers. They
are a new generation of environmental protection materials. They are
moisture-proof, breathable, flexible, light, non-combustion-supporting, easy to
decompose, non-toxic, non-irritating and colorful.
3. Twill: various twill fabrics are used to make the surface of
the fabric show oblique lines formed by warp or weft floating lines. Twill is a
medium thickness denim, there are two kinds of thick, fine (20-40 pieces), are
using 2/1 left twill organization, texture than plain cloth slightly thick
soft, front lines clear.
4, rabbit wool: rabbit wool fiber scales are relatively smooth.
Soft sex, hygroscopicity, do not have a ball, also be rabbit flannelette
material underwear rises in recent years one of main reasons. Rabbit hair
belongs to amino acid protein fiber, which is similar to the composition and
structure of human skin, has a good skin-friendly feeling, and has the function
of maintaining animal life.
5, crystal super soft wool surface to be more delicate, feel
better. High density between fibers, strong three-dimensional sense of hair,
beautiful appearance, compared with the original super soft, glossiness is
higher, feel more soft and thick, fine texture, environmental protection and so
on.
6, wool fabrics have a velveteen, velvet, velvet, cluster
flannelette, polyester silk fabrics flannelette flannelette, knitted fabrics,
cotton fabrics flannelette velvet, velvet fabrics, warp knitted fabrics
flannelette (new varieties, with 50 d polyester yarn and polyester FDY such
DTY75D / 36 f/strong mesh as raw material, using the knitting chain structure,
fabrics successively after scouring desizing, finalize the design, dyeing,
softening, stenter stereotypes, such as deep processing), hole ring
flannelette, super soft plush cloth (the latest varieties), short plush cloth
(the latest varieties)
Our company is equipped with advanced production machines and
complete inspection machines to improve production efficiency and quality. Our
aim is to provide the best service, the fastest delivery time, high quality
products and low price quotation to all customers.
Teddy Bear Teddy Bear,Plush Teddy Bear,Giant Teddy Bear,Plush Stuffed Teddy Bear SHEN ZHEN HAO XIAN LONG TECHNOLGY.CO.,LTD , https://www.haoxianlongtoys.com
The compressor of the high and low temperature test chamber draws low-temperature and low-pressure refrigerant gas from the suction pipe, and after the motor is driven to drive the piston to compress it, the high-temperature and high-pressure refrigerant gas is discharged to the exhaust pipe to provide power for the refrigeration cycle. Compression - condensation - expansion - evaporation (endothermic) refrigeration cycle. What if the refrigerant leaks?
First, observe the pressure gauge on the back of the high and low temperature test chamber to see if the pressure is within the normal range. If it is lower than the normal value, it indicates that the refrigerant leaks. The refrigeration system of the high and low temperature test chamber should be leak tested to the copper tube. The high-pressure nitrogen gas is input, and the leak detector is combined with the soap water to check the leak point. Usually, there is only one leak point, and sometimes there are many leak points, which is relatively rare. After finding the leak point, the leak is welded and sealed by oxygen welding, and then the refrigeration system is filled with nitrogen gas for 48 hours. During the pressure keeping process, the pressure gauge pointer is not changed, indicating that the leak point has been repaired normally and nitrogen is released. The system can be recharged by charging the system with environmentally friendly refrigerants R404 and R23 (brand: DuPont) refrigeration system. 
