Common repair methods for high and low temperature test chambers

Common repair methods for high and low temperature test chambers Failure analysis: First, observe whether the high and low temperature box refrigeration compressor can be started during the operation of the high and low temperature test chamber. If the compressor of the high and low temperature chamber can be started during operation, the main power supply is indicated. The electrical circuits to the high and low temperature box compressors are normal, and there is no problem in the electrical system. When there is no problem with the electrical system of the high and low temperature chamber, continue to check the refrigeration system. First check the two sets of refrigeration compressors in the high and low temperature box. If the exhaust and suction pressures of the low temperature (R23) compressor are lower than the normal value, and the suction pressure is evacuated, this indicates the cooling of the main refrigeration unit. The dose is obviously insufficient. Then touch the exhaust and suction lines of the R23 compressor of the main unit of the high and low temperature chamber by hand. If the temperature of the exhaust line is not high, the temperature of the suction line is not low (no frost). It also illustrates the lack of R23 refrigerant in the host group. One of the high and low temperature test chambers is the main unit, and the other is the auxiliary unit. When the cooling rate is high, the two sets of units work at the same time. In the early stage of the temperature maintenance stage, the two units still work at the same time. When the temperature is initially stabilized, the auxiliary unit stops working, and the host group maintains the temperature drop and stability. If the host group R23 leaks, the cooling effect of the host group will be small. Because the two units work at the same time during the cooling process, there is no temperature stability, and the cooling rate is lowered. During the temperature maintenance phase, once the auxiliary unit stops working, the main unit has no cooling effect, and the air temperature in the high and low temperature test chamber will rise slowly. When the temperature rises to a certain level, the control system will start the auxiliary unit to cool down, then The auxiliary unit stops working again. If it is repeated, there will be a phenomenon that the low temperature cannot be maintained.

Animal series keyrings, a variety of types, can be customized according to customer needs of different animal series keyrings. Its main materials are wool fabric and polypropylene cotton filler. There are four main types of plush fabrics. The first common yarn, made of BOA material, can be divided into light yarn, usually straight yarn, and can be divided into yin and Yang yarn in different directions. And matte gauze is matte color, basically without both yin and yang. The second kind of yarn is called special yarn. It has sheets and long short wool. The length of wool is controlled at 4-20 mm. The third kind is called wool, wool grows in the range of 20-120 mm, can do any wool growth in the range of 20-45 mm, more than 45 mm is only 65 mm and 120 mm, belongs to long hair, wool is straight, not easy to curl. The fourth type is curly hair, usually granular hair, wool or curly hair. Polypropylene cotton, commonly known as baby cotton, hollow cotton, also known as cotton, chemical fiber man-made materials polypropylene, polypropylene (a plastic optical density, special attention to polyester can not be confused) from the technological differences: mainly hollow fiber and two kinds, respectively: good elasticity of products, smooth feel. The Plush key chain produced by our company is beautiful and generous, durable, three-dimensional, bright and compact. Products can be made according to customer requirements of different specifications, colors, thickness, grade, packaging, etc. Marks can be customized, is a good choice for promotional gifts. Animal series Keyrings can not only decorate your life, but also highlight your nobility. What kind of Keychain a person uses, you can see his personality, life and hobbies, you can also see who can bring you good luck.


Major description:
1. Cloth ordering: in modern society, there is a clear division of labor, and manufacturers have their own responsibilities for the manufacturing of cloth and the production of doll products. Production problems tend to occur in non-factory processes. For this reason, it is particularly important for us to control the quality of materials. We strictly select several fixed material cooperative factories, which not only ensure the richness of material color, but also control the stability of material quality.
2. Making knife mold: the time required for making the knife mold of plush dolls is short, and it only takes a few hours from the start of making to the official use of the knife mold. Come on! Low price! Fashion! It has become an important factor for most companies to choose plush dolls as promotional gifts, conference gifts and event souvenirs.
3. Fabric opening: there are four ways to open the plush doll: punching machine, laser, electric shearing, and thermal shearing. Punch material opening needs to unfold the whole roll of cloth lamination first. The more layers there are, the lower the material opening cost will be. In the industry, generally, the 28 to 33 layers shall prevail. The factory will be subject to the 28 floor, in each process in strict accordance with the standard implementation to ensure the large cargo and sample effect of the anastomosis.
4. Electric embroidery and silk-screen printing: electric embroidery and silk-screen printing are the main presentation forms of logo or pattern on the customized figures; Silk-screen printing is a printing process, most of the cases are not necessarily electric embroidery looks high-grade. However, electrical embroidery cannot completely replace silk screen printing. For example, small and complex patterns or logo electrical embroidery cannot be realized. Only silk screen printing can show fine and clear patterns. For example, some parts of the requirements to make patterns at the same time to avoid the hardening of the parts affect the appearance (electrical embroidery will lead to the hardening of the parts), then also need to choose the process of electrical embroidery to show the logo or pattern. Of course, we don't have to worry about which process to choose to show our logo. We will provide professional solutions according to the actual situation.
5. Stitching and cutting: stitching is a process of stitching all cut pieces together, which is one of the most important processes in all processes. Whether the sewing process is strictly in accordance with the standardization will directly affect the smoothness of the appearance of the doll; Our factory has established strict sewing standards. A. Sewing seam 45 mm, uniform stop, needle spacing 12 inches. B. Fine needle with 11# needle and 402 fine thread. C. All point positions and bone positions must be aligned and shall not be exploded.
6, rolling cotton: cotton seems to be a simple process, in fact, is a very important process; Indeed, it is very easy to learn cotton, a new master as long as five minutes can learn to cotton. But it's not easy to do the simple job of making cotton well. Cotton is not only to cotton into the doll's shell inside, cotton also needs to be flushed evenly, to ensure that the finished product is a round full appearance. Simple things can be repeated to become an expert, to become a cotton expert needs at least three years to accumulate; And I plant all the cotton puncher is more than five or six years of experts.
7, sewing manual: sewing, manual, is the final process of plush toys finished products; Each doll in the cutting stitching stage will leave a position without stitching, the position is commonly known as leather or cotton left mouth position, as the name suggests is reserved for leather and cotton. And this position can only wait until the cotton is finished after the manual suture.
8. Product quality inspection: the product quality inspection is the last quality control link. After the product passes the quality inspection, it becomes the final product to be delivered to the customer. As a product quality inspector, I need not only the carefulness to find out product defects comprehensively, and the technology to repair defects, but more importantly, a sense of responsibility and a mindset that customers will not be satisfied if I am not satisfied.
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Animal Series Key Rings

Animal Series Key Rings,Animal Dolphin Key ring,Animal Creative Students Key Ring,Quality Animal Key Rings

SHEN ZHEN HAO XIAN LONG TECHNOLGY.CO.,LTD , https://www.haoxianlongtoys.com