Device For Adding Refrigerant Into Automobile Air Conditioning System

Abstract

A device for adding refrigerant into automobile air conditioning system, said device comprising: an air passage, a refrigerant port, and an air conditioning port; the air passage communicates the refrigerant port and the air conditioning port; wherein, a valve and a T-shape connector are provided along the air passage, the valve controls the opening of the air passage; the first end of the T-shape connector communicates with the valve, the second end of the T-shape connector communicates with the air conditioning port, and the third end of the T-shape connector communicates with a pressure gauge. While adding refrigerant, users can read the pressure of the automobile air conditioning system through the pressure gauge.

What is claimed is: 
     
         1 . A device for adding refrigerant into automobile air conditioning system, said device comprising:
 an air passage, a refrigerant port, and an air conditioning port; the air passage communicates the refrigerant port and the air conditioning port; wherein, a valve and a T-shape connector are provided along the air passage, the valve controls the opening of the air passage;   the first end of the T-shape connector communicates with the valve, the second end of the T-shape connector communicates with the air conditioning port, and the third end of the T-shape connector communicates with a pressure gauge;   the refrigerant port further comprises a first end and a second end, which communicates with each other via a center hole; the first end communicates with a refrigerant storage canister; the second end communicates with the valve; a piercing member, a spring, and a rubber seal are disposed in the refrigerant port; the spring bias the rubber seal;   the piercing member comprises a sharp end and a flanging cap; the sharp end of piercing member is disposed in the first end of the refrigerant port and points toward the refrigerant storage canister; the flanging cap contacts the edge of the center hole; the sharp end is used to pierce through the sealing of the refrigerant storage canister;   an hallow end cap is disposed in the second end of the refrigerant port; the end cap contacts the inner surface of the second end and engages the flanging cap of the piercing member.   
     
     
         2 . A device for adding refrigerant into automobile air conditioning system according to  claim 1 , wherein, the valve further comprises a valve body, a charging end, and a supply end;
 the supply end connects to the refrigerant port, and the charging end connects to the T-shape connector; the angle between the charging end and the valve body is an acute angle.   
     
     
         3 . A device for adding refrigerant into automobile air conditioning system according to  claim 2 , wherein, the angle between the charging end and the valve body is between 25 and 75 degree. 
     
     
         4 . A device for adding refrigerant into automobile air conditioning system according to  claim 3 , wherein, the angle between the charging end and the valve body is 43 degree. 
     
     
         5 . A device for adding refrigerant into automobile air conditioning system according to  claim 2 , wherein, the valve body further comprises a plunger seat, a plunger disposed in the plunger seat, and a driving unit; the driving unit includes a trigger connected to the plunger, and a spring biasing the trigger. 
     
     
         6 . A device for adding refrigerant into automobile air conditioning system according to  claim 1 , wherein, a plate is disposed between the first end and the second end of the refrigerant port; threads are formed on the outer surface of the second end; and a sealing ring engaging the plate is provided on the outer surface. 
     
     
         7 . A device for adding refrigerant into automobile air conditioning system according to  claim 1 , wherein, the end cap and the inner surface of the second end are connected by stress. 
     
     
         8 . A device for adding refrigerant into automobile air conditioning system according to  claim 1 , wherein, threads are formed on the outer surface of the end cap and the inner surface of the second end; the end cap threads on the outer surface of the end cap connects to the threads on the inner surface of the second end. 
     
     
         9 . A device for adding refrigerant into automobile air conditioning system according to  claim 1 , wherein, at least one reinforcing strip is formed along the longitudinal direction of the flanging cap; and at least one corresponding groove is formed on the edge of the center hole. 
     
     
         10 . A device for adding refrigerant into automobile air conditioning system according to  claim 1 , wherein, a layer of copper is electroplated on the flanging cap; and the flanging cap is soldered to the edge of the center hole. 
     
     
         11 . A device for adding refrigerant into automobile air conditioning system according to  claim 1 , wherein, a pin is disposed in the center of the air conditioning port; while adding refrigerant, the pin engages with the automobile air conditioner servicing port. 
     
     
         12 . A device for adding refrigerant into automobile air conditioning system according to  claim 1 , wherein, the device further comprises a housing, the refrigerant port and the valve are disposed in the housing; the T-shape connector connects to the housing by tubes; the air conditioning port connects to the T-shape connector by tubes.