Piston compressor and portable refrigerator comprising same

Abstract

A piston compressor and a portable refrigerator. The portable refrigerator comprises a piston compressor, the piston compressor comprising a cylinder head, a cylinder head gasket, a valve plate, an intake valve, a valve gasket and a crankcase, wherein the cylinder head comprises a cylinder head high-pressure chamber and a cylinder head discharge hole, the crankcase comprises a crankcase high-pressure chamber and a crankcase discharge hole corresponding to the cylinder head discharge hole, and the piston compressor is provided with a plurality of gas discharge paths for discharging gas that enters the cylinder head high-pressure chamber, the plurality of gas discharge paths comprising: a gas discharge path, along which the gas leaves the cylinder head high-pressure chamber, passes through a gas guide hole in the cylinder head gasket, a gas guide hole in the valve plate, a gas guide hole in the intake valve and a gas guide hole in the valve gasket in sequence to a crankcase channel to enter the crankcase high-pressure chamber, then enters the crankcase discharge hole through a crankcase discharge channel, and is discharged through the cylinder head discharge hole; and at least one further gas discharge path, along which the gas leaves the cylinder head high-pressure chamber and returns to be discharged through the cylinder head discharge hole.

1 . A piston compressor, comprising a cylinder head, a cylinder head gasket, a valve plate, an intake valve, a valve gasket and a crankcase, the cylinder head comprising a cylinder head high-pressure chamber and a cylinder head discharge hole, and the crankcase comprising a crankcase channel, a crankcase high-pressure chamber, a crankcase discharge channel, and a crankcase discharge hole that corresponds to the cylinder head discharge hole, characterized in that the piston compressor is provided with a plurality of gas discharge paths for discharging gas that enters the cylinder head high-pressure chamber, the plurality of gas discharge paths comprising:
 a gas discharge path, along which the gas leaves the cylinder head high-pressure chamber, passes through a gas guide hole in the cylinder head gasket, a gas guide hole in the valve plate, a gas guide hole in the intake valve and a gas guide hole in the valve gasket in sequence to the crankcase channel to enter the crankcase high-pressure chamber, then enters the crankcase discharge hole through the crankcase discharge channel, and is discharged through the cylinder head discharge hole; and at least one further gas discharge path, along which the gas leaves the cylinder head high-pressure chamber and returns to be discharged through the cylinder head discharge hole.   
     
     
         2 . The piston compressor of  claim 1 , characterized in that the crankcase channel is a recess in communication with the crankcase high-pressure chamber; and the crankcase discharge channel is a recess having one end in communication with the crankcase high-pressure chamber and the other end in communication with the crankcase discharge hole. 
     
     
         3 . The piston compressor of  claim 1 , characterized in that the at least one further gas discharge path comprises a gas discharge path, along which the gas leaves the cylinder head high-pressure chamber, passes through an additional gas guide hole in the cylinder head gasket, an additional gas guide hole in the valve plate, an additional gas guide hole in the intake valve and an additional gas guide hole in the valve gasket in sequence to an additional crankcase channel to enter the crankcase high-pressure chamber, then enters the crankcase discharge hole through the crankcase discharge channel, and is discharged through the cylinder head discharge hole. 
     
     
         4 . The piston compressor of  claim 1 , characterized in that the at least one further gas discharge path comprises a gas discharge path, along which the gas leaves the cylinder head high-pressure chamber, passes through an additional gas guide hole in the cylinder head gasket, an additional gas guide hole in the valve plate, an additional gas guide hole in the intake valve and an additional gas guide hole in the valve gasket in sequence to an additional crankcase discharge channel to enter the crankcase discharge hole, and is then discharged through a cylinder head discharge hole. 
     
     
         5 . The piston compressor of  claim 1 , characterized in that the at least one further gas discharge path comprises: a gas discharge path, along which the gas leaves the cylinder head high-pressure chamber, passes through an additional gas guide hole in the cylinder head gasket, an additional gas guide hole in the valve plate, an additional gas guide hole in the intake valve and an additional gas guide hole in the valve gasket in sequence to an additional crankcase channel to enter the crankcase high-pressure chamber, then enters the crankcase discharge hole through the crankcase discharge channel, and is discharged through the cylinder head discharge hole; and a gas discharge path, along which the gas leaves the cylinder head high-pressure chamber, passes through a further additional gas guide hole in the cylinder head gasket, a further additional gas guide hole in the valve plate, a further additional gas guide hole in the intake valve and a further additional gas guide hole in the valve gasket in sequence to an additional crankcase discharge channel to enter the crankcase discharge hole, and is then discharged through the cylinder head discharge hole. 
     
     
         6 . The piston compressor of  claim 3 , characterized in that the additional crankcase channel is a recess in communication with the crankcase high-pressure chamber; and the additional crankcase discharge channel is a recess in communication with the crankcase discharge hole. 
     
     
         7 . The piston compressor of  claim 1 , characterized in that the at least one further gas discharge path comprises two gas discharge paths, along one of which the gas leaving the cylinder head high-pressure chamber and passing through an additional gas guide hole in the cylinder head gasket, an additional gas guide hole in the valve plate, an additional gas guide hole in the intake valve and an additional gas guide hole in the valve gasket in sequence to the crankcase gas guide channel enters the crankcase high-pressure chamber, then enters the crankcase discharge hole through the crankcase discharge channel, and is discharged through the cylinder head discharge hole; and along the other of which the gas enters the crankcase discharge hole and is discharged through the cylinder head discharge hole. 
     
     
         8 . The piston compressor of  claim 7 , characterized in that the crankcase gas guide channel is in the form of an L-shaped recess, and comprises a first guiding portion for guiding the gas to the crankcase high-pressure chamber and a second guiding portion for guiding the gas to the crankcase discharge hole. 
     
     
         9 . The piston compressor of  claim 1 , characterized in that the at least one further gas discharge path comprises a gas discharge path, along which the gas leaves the cylinder head high-pressure chamber, passes through an additional gas guide hole in the cylinder head gasket to a valve plate discharge channel in the valve plate, then enters a valve plate discharge hole, and is discharged through the cylinder head discharge hole. 
     
     
         10 . The piston compressor of  claim 9 , characterized in that the valve plate discharge channel is a through-going slit or a recess in communication with the valve plate discharge hole. 
     
     
         11 . A portable refrigerator, characterized in that the portable refrigerator comprises a piston compressor according to  any one of the preceding claims . 
     
     
         12 . The portable refrigerator according to  claim 11 , characterized in that the portable refrigerator is a vehicle-mounted refrigerator.