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公开(公告)号：US10316865B2
公开(公告)日：2019-06-11
申请号：US15556486
申请日：2016-03-02
Applicant: DENSO CORPORATION
Inventor： Yoshiyuki Yokoyama , Haruyuki Nishijima , Etsuhisa Yamada , Ryota Nakashima , Yoshiaki Takano , Kazunori Mizutori , Yorito Kohara , Hiroshi Shintani
Abstract: An ejector has a nozzle, a body, a passage defining member and a drive portion. The body has a refrigerant suction port and a pressure increasing portion. A nozzle passage is defined between an inner surface of the nozzle and an outer surface of the passage defining member and has a minimum sectional area portion, a tapered portion, and an expansion portion. The minimum sectional area portion has a smallest passage sectional area. The tapered portion is located upstream of the minimum sectional area portion in a refrigerant flow direction and has a passage sectional area decreasing toward the minimum sectional area portion gradually. The expansion portion is located downstream of the minimum sectional area portion in the refrigerant flow direction and has a passage sectional area increasing gradually. The passage defining member has a groove that is recessed to increase the passage sectional area of the nozzle passage.
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