At present, the trend of refrigeration industry is embodied in energy conservation, environmental protection and intelligent control. As one of the four key components of refrigeration system, the development trend of expansion valve is consistent with the industry as a whole. The trend of electronic expansion valve replacing thermal expansion valve began to appear many years ago, even more obvious in recent years, the replacement speed is also accelerating, and the annual growth of sales volume of electronic expansion valve also confirms this point.
It is pointed out that "in the field of refrigeration, thermal expansion valve and capillary still occupy the main consumption. Firstly, in the field of commercial refrigeration, the market is relatively conservative, and it will take longer for the market to accept electronically controlled products. In addition, the schemes of electronic expansion valve and controller need to become more competitive, but more and more refrigeration customers have begun to use electronic products Expansion valve, and benefit from it, many refrigeration customers want to know about electronic expansion valve, and often through large and medium-sized technology promotion meeting to introduce the technology of electronic expansion valve, so in the long run, energy saving is the big direction, electronic expansion valve is the inevitable choice. "
Some insiders also think that in a short time, electronic expansion valve can not completely replace thermal expansion valve. "Compared with thermal expansion valve, the technology of electronic expansion valve is more complex and its application cost is more expensive. In order to give full play to the advantages of electronic expansion valve, it is necessary to provide controller, temperature sensor and pressure transmitter. However, the cost of peripheral controller and probe with stable performance is relatively high. The use of low-cost temperature sensors, because of their unstable quality, is easy to cause damage to the system and compressor. " Emerson environmental optimization technology said that Emerson environmental optimization technology provides products with high reliability and energy efficiency, which can ensure good operation of customers and achieve energy saving. Emerson environmental optimization technology provides overall solutions for the air conditioning and cold chain industries. Our solutions combine compressors, fluid control valves, electronic controls and monitoring systems to bring more value to our customers.
Of course, it is only a matter of time before the electronic expansion valve becomes more and more mature and widely used, and the electronic controller and sensor are upgraded.
For the great heat of electronic expansion valve and the problem of replacing thermal expansion valve, Danfoss stressed: "in the field of commercial refrigeration and air conditioning, we believe that the selection and use of expansion valve should be based on the application needs of customers, while taking into account the accuracy of control and reliability of operation. Refrigeration enterprises should choose electronic expansion valve or thermal expansion valve to optimize the system on the basis of fully verifying the function and reliability according to their own technological development, specific product types and application environment of target customers, rather than simply pursuing intelligent control and ignoring the reliability of the core functions of the system. "
At the same time, the use of electronic expansion valve needs to consider the cooperation of electronic expansion valve, controller and sensor. The quality of control directly determines the accuracy and reliability of valve operation, which requires refrigeration enterprises to master control technology for technical reserves. As a global leader in the expansion valve industry, Danfoss has continuously increased investment in the development of electronic expansion valve. By providing a combination of electronic expansion valve, controller, driver and temperature sensor, Danfoss can provide customers with overall solutions, reduce the difficulty of customer implementation, bring customers the best matching of cost and revenue, and actively promote the electronic expansion valve in high-precision room air conditioning The application of chiller, heat pump and other high-end industries has established a leading position in the Chinese market.
In the field of commercial refrigeration, the difficulty of the promotion of electronic expansion valve lies in the need for support from many other aspects, such as cost-effective controllers and sensors, and professional installation and debugging personnel. Obviously, this aspect is not mature, which has always been committed to doing, but this is a relatively conservative market, which will not change dramatically overnight Transformation needs us to cultivate. Sanhua is actively developing the expansion valve controller. At the same time, in order to support the use of the controller, the pressure sensor has been developed step by step, and the vertical needle provides a set of very competitive overall packaging scheme to the market.