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Thermostatic and electronic expansion valves for ammonia.

[In Japanese. / En japonais.]

Author(s) : SAKANO K.

Type of article: Article

Summary

In the near future, a small-sized system and minimized refrigerant will be required for ammonia refrigerating systems. Therefore, direct expansion systems should be considered. Thermostatic expansion valves for ammonia are especially suitable for liquid injection in "dry" evaporators. Recently, automation, lower manpower, and energy savings are increasingly in demand. Electronic expansion valves are most suitable for these demands. Those operating on the principle of pulse width modulation designed for small refrigerating plants are presented. The valves are built with a standard solenoid valve which has been modified to meet the demand for a very long lifetime. These electronic control systems can be used not only for expansion valve control but also diagnostic functions and data communication.

Details

  • Original title: [In Japanese. / En japonais.]
  • Record ID : 1996-1566
  • Languages: Japanese
  • Source: Refrigeration - vol. 70 - n. 812
  • Publication date: 1995/06
  • Document available for consultation in the library of the IIR headquarters only.

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