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    How to distinguish between original refrigeration compressors and second-hand refrigeration compressors

    How to distinguish between original refrigeration compressors and second-hand refrigeration compressors At present, in order to make huge profits, there are illegal businesses on the market that often use second-hand or refurbished, off-line refrigeration compressors to make industrial chillers. They are used in some water-cooled industrial chillers, air-cooled industrial chillers, and screw-type water-cooled industrial chillers. As a result, it seriously affects the interests of customers and disrupts the cold storage construction market, resulting in major losses for the manufacturers. Even after some merchants have received the payment, they will not help the customers to repair when the compressor is broken. Below, how do we judge whether the compressor is It is to refurbish this issue to discuss. How to distinguish between original refrigeration compressors and second-hand refrigeration compressors? 1. The production cost of the original machine can not be compared with the second-hand goods in the market, refurbishment, and off-line machine. You can observe the gloss of the paint on the outside of the compressor. In general, the gloss of the paint on the outside of the compressor is very good. It should be reflective when the light is good, and the paint of the second-hand refurbished compressor is generally dark. 2. The cleanliness of the compressor refrigeration oil can be observed through the sight glass. Generally, the refrigeration oil of second-hand refurbished compressors contains certain impurities or the transparency of the oil is not high. 3. It can be judged by the sales price of the compressor. The sales profit of new compressors of large manufacturers is generally around 10% -20%. If the sales price is obviously low, it may be the use of second-hand refurbished compressors. 4. The basic operations of refrigeration maintenance are electricians, mechanics, etc., often some of the personnel experience the technology is simply not enough, and there are few who are actually certified to work, even if they hold the certificate, some have no maintenance experience. The most basic analysis of the refrigeration system is indispensable for the following 4 items: A high and low pressure (compression ratio) B cold coal charge C operating current D compressor superheat / 1 of the above 4 items has an excessive deviation, which will cause compressor loss! If you use a brand new machine from the factory, the operation can achieve the above points, and it will take a few years to use it if it is broken! 5. According to the compressor warranty terms, the original compressors are basically open cylinder inspection warranty. Only a few brands on the market have an unconditional warranty! This kind of warranty law is basically that manufacturers pay for some new buyers to pay tuition. (If the size is too large, the size must be small. If the heat dissipation is not good, the compressor should be returned. If the compressor is protected, it must be returned. If you buy the wrong one, you should also return the wrong one! Bad compressors should also be retired, lack of phases, and clogging should also be retired. There is no installation and operation knowledge at all. Orders are also made to make repairs, etc.) Many buyers are hurt, and it is likely that they will buy a repair machine of poor quality when buying new products! (Returned to the factory for repair) caused brand discounts and reduced quality! 6. The above description is clear to many buyers. The new compressor joint venture brand compressors are not guaranteed in the market. If the warranty price is definitely more than doubled. Because such manufacturers have strong technology, advanced equipment, years of production experience, and strict quality inspections of daily production capacity. There is no deviation in production quality! So there are several reasons for not warranty! 7. Compressor distinction: First, if you buy 2 identical machines, please use the meter to measure the winding resistance. If it is a new machine, it must be consistent! Secondly, if you buy a machine, please smell if the odor of the machine is very strong during the pressure test or test the exhaust port with an open flame for discoloration (the lighter's fire should be yellow, the discoloration indicates that it has been used, and has been filled with fluorine Even if the inside of the machine can't be washed with gasoline, it can't be washed).

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    Does the amount of refrigerant cause frost in the return air pipe and the compressor

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