Analysis of patents of the valve of refrigeration compressor
From the perspective of patent,analyzed the patents related to the valve technique for compressors used for refrigeration.The number of the related patents dis-tributed by countries was summarized.The trends of number of patents distributed by cal-endar year of grant in China and foreign countries were shown respectively.The main ap-plicants were also list in this paper.The paper summarized the main categories of the valve technique for compressors and their patent distribution.Different valve structures were re-viewed.The purpose of this paper is to provide useful information for further development of the valve technique for refrigeration compressors.