Title:
RESTRICTION DEVICE AND REFRIGERATION CYCLE SYSTEM
Document Type and Number:
Japanese Patent JP2016142380
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a restriction device and a refrigeration cycle system capable of restricting occurrence of allophone.SOLUTION: A restriction device 10 comprises: a valve seat member 2 having a valve port 21; a needle valve 4 making a degree of opening of the valve port 21 variable; and a cylindrical guide member 3 for advancing or retracting or guiding the needle valve 4. The needle valve 4 and the guide member 3 have sliding contact surfaces 34 and 46 formed respectively oppositely facing each other through a predetermined clearance and slidably contacted to each other, the clearance is made as an intermediate flow passage 45 for making fluid flow from the valve port 21 toward the secondary side, and the sliding contact surface 46 of the needle valve 4 has a recess groove 47 acting as a flow passage expansion part where a width size of the intermediate flow passage 45 is expanded to be recessed in a direction spaced apart from the sliding contact surface 34 of the guide member 3.SELECTED DRAWING: Figure 3
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Inventors:
TAKADA HIROMASA
TOYAMA YUICHIRO
YAGI SHIMPEI
YOKOTA JUNICHI
TOYAMA YUICHIRO
YAGI SHIMPEI
YOKOTA JUNICHI
Application Number:
JP2015020204A
Publication Date:
August 08, 2016
Filing Date:
February 04, 2015
Export Citation:
Assignee:
SAGINOMIYA SEISAKUSHO INC
International Classes:
F16K17/34; F16K1/32; F16K47/02; F16K47/04; F25B1/00; F25B41/06
Domestic Patent References:
| JP2004218918A | 2004-08-05 | |||
| JPS5990671U | 1984-06-19 | |||
| JP2004218918A | 2004-08-05 | |||
| JPS5990671U | 1984-06-19 | |||
| JPS6349066U | 1988-04-02 | |||
| JPS6349066U | 1988-04-02 |
Attorney, Agent or Firm:
Hideo Takino
Takao Kawasaki
Fumio Takino
Toshiaki Tsuda
Masashi Torino
Takao Kawasaki
Fumio Takino
Toshiaki Tsuda
Masashi Torino