(19)
(11) EP 0 926 345 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
08.03.2000 Bulletin 2000/10

(43) Date of publication A2:
30.06.1999 Bulletin 1999/26

(21) Application number: 98124026.0

(22) Date of filing: 17.12.1998
(51) International Patent Classification (IPC)7F04B 39/10
(84) Designated Contracting States:
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
Designated Extension States:
AL LT LV MK RO SI

(30) Priority: 26.12.1997 JP 36003797

(71) Applicant: Sanden Corporation
Isesaki-shi, Gunma 372-8502 (JP)

(72) Inventors:
  • Kurihara, Masayuki c/o Sanden Corporation
    Isesaki-shi, Gunma, 372-8502 (JP)
  • Uchikado, Iwao c/o Sanden Corporation
    Isesaki-shi, Gunma, 372-8502 (JP)
  • Kimura, Yoshio c/o Sanden Corporation
    Isesaki-shi, Gunma, 372-8502 (JP)
  • Noda, Tetsuya c/o Sanden Corporation
    Isesaki-shi, Gunma, 372-8502 (JP)

(74) Representative: Prüfer, Lutz H., Dipl.-Phys. et al
PRÜFER & PARTNER GbR, Patentanwälte, Harthauser Strasse 25d
81545 München
81545 München (DE)

   


(54) Shape of suction hole and discharge hole of refrigerant compressor


(57) Discharge holes and suction holes having shapes that suppress the turbulence of a refrigerant gas flow is disclosed. The shape of the discharge hole according to the present invention has a tapered surface wall, such that the circumference of the discharge hole increases from the piston cylinder surface to the discharge chamber surface. Similarly, the shape of the suction hole according to the present invention has a tapered surface wall such that the circumference of the suction hole increases from the suction chamber surface to the piston cylinder surface. The present invention allows the flow path of the refrigerant gas to flow approximately tangential to the valve reed by providing a tapered surface wall. The flow resistance of the discharge hole or the suction hole is reduced such that the volume efficiency of the compressor is improved and compressor noise is suppressed.







Search report