(19)
(11) EP 1 691 149 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
10.10.2007 Bulletin 2007/41

(43) Date of publication A2:
16.08.2006 Bulletin 2006/33

(21) Application number: 06000619.4

(22) Date of filing: 12.01.2006
(51) International Patent Classification (IPC): 
F25B 41/06(2006.01)
(84) Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR
Designated Extension States:
AL BA HR MK YU

(30) Priority: 13.01.2005 JP 2005006344
14.11.2005 JP 2005329466

(71) Applicant: DENSO CORPORATION
Kariya-city, Aichi-pref. 448-8661 (JP)

(72) Inventors:
  • Murase, Yoshinori Intellectual Property Dept.
    Kariya-City Aichi-Pref. 448-8661 (JP)
  • Tomatsu, Yoshitaka Intellectual Property Dept.
    Kariya-City Aichi-Pref. 448-8661 (JP)
  • Kakehashi, Nobuharu Intellectual Property Dept.
    Kariya-City Aichi-Pref. 448-8661 (JP)
  • Ohta, Hiromi Intellectual Property Dept.
    Kariya-City Aichi-Pref. 448-8661 (JP)

(74) Representative: Klingseisen, Franz et al
Klingseisen & Partner Bräuhausstrasse 2
80331 München
80331 München (DE)

   


(54) Expansion valve for refrigerating cycle


(57) An expansion valve for a refrigerating cycle, in which the body dimensions and the weight of the whole valve can be reduced and a reduction in cost can be achieved.
An expansion valve of the invention comprising a temperature-sensing portion arranged in a refrigerant passage leading to an evaporator from a gas cooler or an internal heat exchanger in a vapor compression type refrigerating cycle and varied in internal pressure according to a refrigerant temperature at an outlet side of the gas cooler or on an outlet side of the internal heat exchanger, a valve member that mechanically interlocks with a change in internal pressure of the temperature-sensing portion to adjust an opening degree of a valve port, and a body that accommodates therein the valve member, and wherein the body is provided with a flow passage, through which a refrigerant reduced in pressure by the valve member is led to the evaporator while a refrigerant temperature at the outlet side of the gas cooler or on the outlet side of the internal heat exchanger is transmitted to the temperature-sensing portion. Also, that density, at which a refrigerant is charged in a temperature-sensing body, is set in the range of about 200 kg/m3 to about 600 kg/m3. Further, a ratio of a temperature-sensing cylinder corresponding portion to the temperature-sensing body is made at least 60 %.







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