Science post: why is your self-help vending machine compressor refrigeration effect that bad?

Domestic since selling industry development, still has the extremely huge market capacity and gap, many investment mentality friends will use self-help vending machine as a sideline. More investment in three two drinks self-help vending machine, without much effort, can easily develop a sideline. Many friends carefully will find: with a period of cold drinks self-help vending mechanism effect suddenly becomes poor, especially in hot summer, if you can't provide the cold drinks to customers, will directly affect the operation of the success or failure. In fact, this will involve the issue of today need to discuss: the compressor refrigeration problem. Self-help vending mechanism, in fact, cold effect variation for many reasons, one of the reason is very simple, and may even be ignored but crucial, that is welding of cooling system. 1, the welding is not tight, produce funnelled self-help vending mechanism of cold welding system is mainly to refrigeration equipment components into connection, and form a closed system, ensure smooth work of refrigerant in the system. If welding quality is poor, there are funnelled, refrigerant leakage will occur and the refrigeration effect not only, even damage to the core - self-help vending machine - A compressor. 2, improper welding, produce oxide oxide layer issue also is the common problem in welding, welding place produce oxide layer, oxide layer will fall off into crumbs powder with the refrigerant flow, make the system dysfunctional, refrigeration effect is poor; Tiny powder into the compressor cylinder, piston and cylinder of compressor running belong to precision components, powder into cause compressor cylinder, cause inestimable losses to the refrigeration system. So, when consumer is buying self-help vending machine, to the question how to handle? General enterprise will leak detector tests or system pressure maintaining way to leak detection of self-help vending machine welding points, so as to control product in the factory without leakage. But, unfortunately, small workshops or don't have the strength, often can only solve the problem of large leakage, it is difficult to deal with tiny leak. And production experience and strength of the manufacturers, in the beginning of production, refrigeration products have strict standardization production technology and strict process test to control the quality of the products. For example, self-help vending machine to control the welding quality and ensure that every product does not leak, all need to experience the following strict process: 1) System such as piping, heat exchanger components selection, strict control of internal cleanliness especially welding pipe cleanliness in 35 mg/m&sup 2; Less than, and controls the welding gap is less than 0. 2毫米; 2) Nitrogen protection welding, nitrogen pressure not less than 0. 1Mpa； 3) System time is more than 18 minutes, vacuum vacuum control under 10 pa; 4) Leak detection accuracy is 0. 1 g/year; 5) Online testing operation, the system performance index of less than 95% of the standard; And leak test again after the system runs quickly, because the cooling system running, the pressure values on the high side, if there is a small leakage, after system running will be enlarged leakage value, so once again leak detection will be more strict control of product quality. So, consumer is buying self-help vending machine, need special attention the strength of the manufacturer and production experience, to the manufacturer of refrigeration equipment of welding technology and production process more understanding, to avoid the vending machine after a period of time in refrigeration result is bad, can easily operate your self-help vending machine.