(Summary description)With the continuous improvement of consumers' requirements for air conditioners, variable energy output has become one of the most important and potential technologies after health, energy saving and intelligence. As far as the current air-conditioning industry at home and abroad is concerned, there are two main technologies that can better solve the above functions at the same time: frequency conversion technology and multi-compressor technology. The core of frequency conversion technology lies in the control system, but its materials and research and development costs are high, which will inevitably lead to high prices of frequency conversion products and less purchases by consumers. On the contrary, the core of the multi-compressor technology lies in the design of the refrigeration system. Manufacturers can quickly master the technology and can launch products with lower prices with a low-cost strategy, which greatly improves consumer acceptance.

Multi-compressor air conditioning systems were first used in large central air conditioners and commercial air conditioners. Since these two types of air conditioning systems are not oriented to ordinary household users, the main purpose of their application is not to change energy. With the continuous popularization of household air conditioners and the continuous improvement of user's functional requirements for air conditioners, multi-compressor technology has been gradually applied in household air conditioners, such as: Midea double compressor luxury cabinet. The main features of a multi-compressor air conditioning system are as follows:
①The number of compressors in the air-conditioning system is more than one and the connection mode is series or parallel. Among them, the parallel connection method is more commonly used. The specific connection method is to summarize the exhaust ports of all compressors and all return air ports.
②In the air-conditioning system, each compressor can be controlled separately "on and off". When all the compressors work at the same time, they reach full load, and the system draws out 100% of the energy; when some compressors are stopped, the output energy of the system decreases. By controlling the shutdown and operation of different numbers of compressors, different energy outputs are achieved, that is, the so-called variable energy output.
③The air-conditioning system has high energy efficiency when operating under partial load. Because the heat exchanger of the whole system is matched and designed under the premise of full load operation. Therefore, when operating under partial load, the area of ​​the heat exchanger is relatively increased, and the energy efficiency is higher.

④In order to ensure the reliability of operation, the air-conditioning system is equipped with an efficient oil return and oil distribution system. The most difficult technical problem to solve in a multi-compressor system is the oil return and distribution of lubricating oil. If the oil return is poor or the oil distribution is not uniform, the compressor will be worn out and the system life will be significantly reduced.
⑤Multi-compressor air-conditioning system has a great cost advantage in large-horsepower models. At present, in the compressor market at home and abroad, the relationship between the capacity and price of compressors with a larger number of horses (3 or more) is: when the compressor capacity increases by a multiple, its price increases exponentially. Therefore, the multi-compressor system has certain cost advantages compared with the ordinary fixed-speed system or the inverter air-conditioning system.
⑥Compared with the inverter system, the multi-compressor air-conditioning system has the advantages of low R&D cost, short cycle and no electromagnetic interference. Therefore, under the premise of low cost advantage, its high efficiency, comfort and intelligence can be more concentrated in low-cost air conditioners. The increase in consumer acceptance can also promote the rapid development and popularization of multi-compressor technology.

 

• Categories:Technical Data
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• Time of issue:2017-09-26 20:20
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