Title:
流量調整弁
Document Type and Number:
Japanese Patent JP6901161
Kind Code:
B2
Abstract:
To provide a flow rate adjustment valve capable of effectively reducing noise generated due to pressure fluctuation and a refrigerant separation phenomenon in passing through a valve port, and reducing pressure loss and the like.SOLUTION: In a flow rate adjustment valve 1 including a valve main body 5 provided with: a valve chest 6 and a valve port 10; and a valve body 30 designed to obtain an equal percent characteristic or a characteristic approximate thereto as flow rate characteristics and having a curved surface portion 33 for changing a flow rate of fluid flowing through the valve port 10 according to a lifting amount, and increased in curvature or control angle of the curved surface portion 33 continuously or gradually toward a tip, a diameter of the valve port 10 is successively increased in three or more stages in accordance with separation from the valve chest 6. Concretely, a first valve port portion 11 having a diameter D1, a second valve port portion 12 having a diameter D2 (>D1), and a third valve port portion 13 having a diameter D3(>D2) are successively disposed from the valve chest 6 side. More preferably, D1, D2, D3 are determined so that (valve port ratio: D2/D1) and (valve port ratio: D3/D2) are kept within prescribed ranges.SELECTED DRAWING: Figure 1
Inventors:
Takeshi Suganuma
Ino Taishi
Eri Omori
Ino Taishi
Eri Omori
Application Number:
JP2019234634A
Publication Date:
July 14, 2021
Filing Date:
December 25, 2019
Export Citation:
Assignee:
Fuji Koki Co., Ltd.
International Classes:
F16K1/42; F16K47/02
Domestic Patent References:
| JP2005221095A | ||||
| JP2014081046A | ||||
| JP5696093B2 | ||||
| JP6083946U | ||||
| JP2004340260A |
Foreign References:
| US20110192467 |
Attorney, Agent or Firm:
Hiraki International Patent Office