Location History:
- Hellam, PA (US) (2010 - 2018)
- Etters, PA (US) (2017 - 2019)
Company Filing History:
5 out of 1,941 
1 out of 179 
Years Active: 2010-2019
Title: The Innovative Contributions of Andrew John Graybill
Introduction
Andrew John Graybill is a notable inventor based in Etters, PA (US). He has made significant contributions to the field of refrigeration technology, holding a total of 6 patents. His work focuses on improving the efficiency and functionality of refrigeration systems.
Latest Patents
Among his latest patents is a "Refrigerant control system for a flash tank." This innovative refrigeration system utilizes a tube-side condenser, such as a microchannel condenser, paired with a shell-side evaporator like a falling film evaporator. A flash tank economizer is strategically placed between the condenser and the evaporator, with an inlet valve controlled based on the subcooling of condensate from the condenser. The vapor exiting the flash tank is directed to a system compressor via an economizer line. Additionally, liquid phase refrigerant, combined with some gas phase refrigerant, exits the flash tank and is directed through an orifice before entering the evaporator.
Another significant patent is the "Method for controlling an economizer circuit." This method involves a valve that regulates refrigerant flow between the economizer and the compressor. The valve can be opened or closed based on the output frequency provided to the compressor motor by a variable speed drive and the operating condition of the economizer.
Career Highlights
Throughout his career, Andrew has worked with prominent companies in the industry, including Johnson Controls Technology Company and York International Corporation. His experience in these organizations has allowed him to develop and refine his innovative ideas in refrigeration technology.
Collaborations
Andrew has collaborated with several talented individuals, including William L. Kopko and Satheesh Kulankara. These collaborations have contributed to the advancement of his projects and patents.
Conclusion
Andrew John Graybill's contributions to refrigeration technology through his patents and collaborations highlight his innovative spirit and dedication to improving industry standards. His work continues to influence the field and inspire future advancements in refrigeration systems.