Oil injector for refrigerants of air conditioners and the like
First Claim
1. In a refrigeration system which includes a compressor and an evaporator with the usual conduits extending therebetween and having a refrigerant charging port on the high or low pressure sides of the compressor;
- a device for injecting a predetermined amount of refrigerant oil into said system, said device comprising in combination a cylinder, a piston reciprocal within said cylinder, an end cap on one end of said cylinder, a piston rod extending from one side of said piston and screw threadably engaging through said end cap whereby rotation of said piston rod moves said piston within said cylinder, a further end cap on the other end of said cylinder, filling means in said further end cap and an injector assembly operatively connected to said further end cap, said injection assembly including a manually operated valve, means for purging said injector assembly and means for detachably connecting said injector assembly to the high or low pressure side of a refrigeration system for injecting oil into said system.
1 Assignment
0 Petitions
Accused Products
Abstract
A cylinder is provided with a piston therein having a piston rod screw threadably engaging through one end cap so that rotation of the rod moves the piston along the cylinder. A filler is situated in the other end cap thus allowing the cylinder to be filled with refrigerant oil. An injection assembly is connected to the other end cap and includes a valve, a tube and a connector which may be connected to the high or low side of the refrigerant circuit of a refrigeration assembly such as an air conditioner. Once connected to the refrigerant circuit, a loosening of one union allows the refrigerant within the circuit to purge the line whereupon the union is tightened. The piston rod is marked with indicia along the length thereof so that rotation of the rod a predetermined distance indicates to the operator that a given amount of oil has been ejected from the cylinder and into the refrigerant system.
30 Citations
24 Claims
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1. In a refrigeration system which includes a compressor and an evaporator with the usual conduits extending therebetween and having a refrigerant charging port on the high or low pressure sides of the compressor;
- a device for injecting a predetermined amount of refrigerant oil into said system, said device comprising in combination a cylinder, a piston reciprocal within said cylinder, an end cap on one end of said cylinder, a piston rod extending from one side of said piston and screw threadably engaging through said end cap whereby rotation of said piston rod moves said piston within said cylinder, a further end cap on the other end of said cylinder, filling means in said further end cap and an injector assembly operatively connected to said further end cap, said injection assembly including a manually operated valve, means for purging said injector assembly and means for detachably connecting said injector assembly to the high or low pressure side of a refrigeration system for injecting oil into said system.
- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
- 13. The combination of a refrigeration system and a device for injecting a predetermined amount of refrigerant oil into said system, said system including a compressor and an evaporator with conventional conduits extending therebetween and including a refrigerant charging port on the high or low pressure side of the compressor, said device including a cylinder, a piston reciprocal within said cylinder, an end cap on one end of said cylinder, a piston rod extending from one side of said piston and screw threadably engaging through said end cap whereby rotation of said piston rod moves said piston within said cylinder, a further end cap on the other end of said cylinder, filling means in said further end cap and an injector assembly operatively connected to said further end cap, said injection assembly including a manually operated valve, means for purging said injector assembly and means for detachably connecting said injector assembly to the high or low pressure side of a refrigeration system for injecting oil into said system.
Specification