(19)
(11) EP 1 336 758 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
04.02.2004 Bulletin 2004/06

(43) Date of publication A2:
20.08.2003 Bulletin 2003/34

(21) Application number: 03003453.2

(22) Date of filing: 14.02.2003
(51) International Patent Classification (IPC)7: F04B 33/00, F25B 45/00
(84) Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT SE SI SK TR
Designated Extension States:
AL LT LV MK RO

(30) Priority: 15.02.2002 JP 2002038112
16.04.2002 JP 2002113014
18.04.2002 JP 2002115854

(71) Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.
Kadoma-shi, Osaka 571-8501 (JP)

(72) Inventor:
  • Numoto, Hironao
    Otsu-shi, Shiga 520-2101 (JP)

(74) Representative: Grünecker, Kinkeldey, Stockmair & Schwanhäusser Anwaltssozietät 
Maximilianstrasse 58
80538 München
80538 München (DE)

   


(54) Vacuum pump and installation method for air conditioner


(57) A vacuum pump and an installation method for an air conditioner are provided, whereby, the installation of an air conditioner can be performed readily in a short period of time, whilst restricting harmful effects on the environment. The interior of a cylinder (15) is divided into two chambers by a piston (16), and intake ports (20) and exhaust ports (19) are provided, these intake ports and exhaust ports having non-return valves installed respectively at the top dead center and the bottom dead center of these two chambers of the cylinder. When the piston (16) is caused to move in either direction, then if the respective exhaust ports (19) are connected together, the air inside the cylinder is exhausted, thereby causing the exhaust port (19) side in the cylinder to assume a pressurized state, and if the intake ports (20) are coupled, then the intake ports (20) in the cylinder are caused to assume a negative pressure state.






Search report