At present, there are illegal businesses in the market who often use second-hand or renovated or offline refrigeration compressors to make industrial water chillers in order to seek huge profits. They are used on some water cooled industrial water chillers, air cooled industrial water chillers, and screw type water cooled industrial water chillers, resulting in significant losses for the user manufacturers. Even some businesses, once they have received the payment, do not help the user maintain the compressor when it breaks.
How to distinguish between an original refrigeration compressor and a second-hand compressor? In fact, this method, like the RMB identification method, requires some professional knowledge.
Why is the original refrigeration compressor not warranted? This question is actually very good. Isn't the product covered by three guarantees? It's okay if there's no warranty! Why do you want to sell more expensive and warranty products cheaper?
1. The production cost of original machines cannot be compared to second-hand, refurbished, and offline machines on the market.
2. According to the compressor warranty terms, the original compressor is basically covered by an open cylinder inspection warranty. Only a few brands on the market have unconditional warranties! This type of warranty method is basically used by manufacturers to pay tuition fees for some novice buyers. (If the configuration is too large or too small, the heat dissipation is not good, the compressor cooling is not good, the compressor protection is not good, the wrong installation is wrong, the compressor is damaged due to water ingress into the system, the compressor is also damaged due to lack of phase, the blockage is also returned, and there is no common sense of installation and operation, and the order for repair and matching is also required!) The reason why this type of warranty method is convenient for many buyers (who cannot operate), but also brings harm to many buyers, It is very likely to buy a poor quality repair machine when buying a new product! (Returned for repair) Cause brand discounts and quality degradation!
3. Many buyers have also made it clear from the above explanation that all new joint-venture brand compressors are sold without warranty. If the warranty price is guaranteed to be more than twice as high. Because such manufacturers have strong technology, advanced equipment, several years of production experience, and strict quality inspection for Tianliang's production capacity. There is no deviation in production quality! So there are several major reasons for not maintaining a warranty!
4. Most people who operate refrigeration and maintenance are electricians, mechanics, and others. Often, some of the personnel have experience and skills that are not up to par, and few actually have a certificate to work. Even if they have a certificate, some have no maintenance experience. The most basic analysis of the refrigeration system includes the following four indispensable items: A high and low pressure (compression ratio) B cold coal charging amount C operating current D compressor superheat degree/Excessive deviation of one of the above four items will inevitably lead to compressor loss! If you use the original brand new machine, the operation can achieve the above points, and it will take several years to use it to think it is broken!
5. Compressor differentiation: First of all, if you buy two identical machines, please use a meter to measure the winding resistance. If it is a new machine, it must be consistent! Secondly, if you are buying a machine, please smell if the machine has a strong odor during the pressure test or use an open flame to test the exhaust port for discoloration (the lighter's fire should be yellow, and discoloration indicates that it has been used and has been filled with fluorine, even if the machine is cleaned with gasoline, it cannot be washed).