Purchase must see! How to distinguish between original refrigeration compressor and second-hand refrigeration compressor

Purchase must see! How to distinguish between original refrigeration compressor and second-hand refrigeration compressor

At present, illegal businesses on the market often use second-hand or refurbished or offline refrigeration compressors to make industrial chillers in order to make huge profits. They are used in some water-cooled industrial chillers, air-cooled industrial chillers, and screw-type water-cooled industrial chillers. This seriously affects the interests of customers and disrupts the cold storage construction market, resulting in major losses for users. Even some merchants will not help customers repair the compressor when the compressor is broken after receiving the payment. Next, how do we judge whether the compressor is It is the issue of renovation to discuss.

　　How to distinguish original refrigeration compressor and second-hand refrigeration compressor?

　　 1. The production cost of the original machine cannot be compared with the second-hand, refurbished, and offline machines on the market. You can observe the gloss of the exterior paint of the compressor. Generally speaking, the gloss of the exterior paint of the compressor is very good, and it should be reflective under good lighting conditions, while the paint of second-hand refurbished compressors is generally dark.

　　2. The cleanliness of the compressor refrigerating oil can be observed through the sight glass. Generally, the refrigerating 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 compressors. The sales profit of new compressors from large manufacturers is generally around 10%-20%. If the selling price is obviously low, it may be a second-hand refurbished compressor.

　　4. Basically all electricians and mechanics in the operation of refrigeration maintenance are often electricians, mechanics, etc. There are often some personnel who have no experience and skills at all, and few are truly certified to work, even if the license holders have some without maintenance experience. The most basic analysis of the refrigeration system is indispensable for the following four items: A high and low pressure (compression ratio) B cold coal charge C operating current D compressor superheat / the above four items have an excessive deviation, which will cause compressor loss! If you use the original brand new machine, the operation can achieve the above points, and it will take a few years to think that 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 unconditional warranties! This kind of warranty method basically means that manufacturers pay for the tuition fees for some novice buyers. (If the equipment is large, the equipment must be refunded, the heat dissipation is not good, the compressor must be refunded, the compressor must be refunded if the compressor is protected, and the wrong installation must be refunded! The broken compressor must be returned, the phase is missing, the blockage must be returned, there is no common sense of installation and operation, and the order is repaired!) This kind of warranty method is convenient for many buyers (not operating), but it also gives Many buyers have caused harm, and it is very likely that they bought a poor quality repair machine when buying a new product! (Returned to the factory for repair) caused brand discounts and reduced quality!

　　6. Many buyers are also aware of the above description. The brand new joint venture compressors on the market are not guaranteed. Such as the warranty price must be sold more than 1 times higher. Because such manufacturers have strong technology, advanced equipment, several years of production experience, and strict quality inspections with a large amount of production capacity. There is no deviation in production quality! So there are several reasons for non-warranty!

　　 7. Compressor distinction: First, if you buy two identical machines, please use a meter to measure the winding resistance. If it is a new machine, it must be the same! Secondly, if you buy a machine, please smell the peculiar smell of the machine when you test pressure, or use an open flame to test whether the exhaust port is discolored (the lighter's fire should be yellow, and the discoloration indicates that it has been used and has been charged with fluorine. Even if the inside of the machine is cleaned with gasoline, it cannot be washed).