Expansion valve for use in refrigerating and like

专利名称：Expansion valve for use in refrigerating and

like apparatus

发明人：WOLF LOUIS JOEL申请号：US82569申请日：19490321公开号：US2594701A公开日：19520429

摘要：677,632. Valves. REFRIGERATOR COMPONENTS, Ltd. March 10, 1949 [March 10,1948], No. 7399/48. Class 135. A pressure-regulating valve suitable for use as anexpansion valve in a refrigerator comprises a body 1 having a diaphragm chamber 2, anopen-ended skirt 7 coaxial with the chamber 2, inlet and outlet branches 11, 9 openinginto the skirt, and a detachable valve unit comprising a plug 14 screwed into the skirt anda valve assembly wholly accommodated in the plug, the arrangement permitting removalof the valve assembly without disturbing pipe connections and the diaphragm. The valveshown is of the type in which the pressure of an adjustable spring 20 and the evaporatoror outlet pressure acting through a passage 27 on the lower side of the diaphragmtending to close the valve are balanced by a spring 5 and a fluid pressure acting on theupper side of the diaphragm, the fluid pressure varying according to the temperature ofthe refrigerant at the outlet of the evaporator. The upper end of the plug 14 limits thedownward movement of the diaphragm and has a bore in which slides a cap 25 engaging avalveactuating pin 26, the valve member being a ball 19 coacting with a seat 18. Resilientsealing rings 28, 29 are provided in grooves in the plug 14. A filter 12 is fitted in the inlet11. In a modification, the upper side of the diaphragm is open to atmosphere and the

spring above the diaphragm is adjustable. The valve member is of the needle type and.the inlet passage is rearranged to reduce the overall height of the valve.

申请人：REFRIGERATOR COMPONENTS LIMITED

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