Reciprocating compressor

Abstract

The invention discloses a reciprocating compressor. The reciprocating compressor comprises a lower shell, an upper shell, a stator, a rotor, a crankshaft, a crankshaft support, a piston, a connecting rod, an air cylinder, a valve seat and a cylinder cover. The valve seat is installed on the front end face of the air cylinder and blocked through the cylinder cover. The crankshaft is fixed to the crankshaft support. The rear end of the piston is connected with a piston rod. The front end of the connecting rod is connected with the piston rod through a rotating shaft. The rear end of the connecting rod is connected with the crankshaft in a rotating mode. A seal cover which seals the rear end face of the air cylinder is arranged on the rear end face of the air cylinder, wherein a through hole which is in sliding seal fit with the piston rod is formed in the center of the seal cover. The air cylinder with the sealed front end and the sealed rear end is divided by the piston into a compression working chamber and an auxiliary air suction chamber. At least one auxiliary suction hole which is communicated with low-pressure air inside a compressor shell and the auxiliary air suction chamber is formed in the wall of the air cylinder in the circumferential direction. An auxiliary air suction channel communicated with the auxiliary air suction chamber is formed in the wall of the air cylinder. When the compression working chamber sucks air, the auxiliary suction hole of the auxiliary air suction chamber is blocked by the piston from the side face.

Description

【Technical field】 [0001] The invention relates to compressor technology, in particular to a reciprocating compressor. 【Background technique】 [0002] Among the current reciprocating compressors, especially piston compressors, such as figure 1 As shown, it includes lower housing 1a, upper housing 2a, suction muffler 3a, stator 4a, rotor 5a, crankshaft 6a, crankshaft bracket 7a, piston 8a, connecting rod 9a, cylinder 10a, valve seat 11a and cylinder head 12a , when the cylinder 10a is in the air intake process, the quality of the refrigerant actually sucked into the cylinder is often much smaller than the theoretically calculated value, resulting in a lower discharge cooling capacity. The main reason is that when inhaling, the suction valve of the valve seat 11a has been closed before the piston 8a reaches the bottom dead center, so that the refrigerant can no longer enter the cylinder 10a. Therefore, the theoretically calculated refrigerant value is not sucked into the cavit...

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Problems solved by technology

[0002] Among the current reciprocating compressors, especially piston compressors, such as figure 1 As shown, it includes lower housing 1a, upper housing 2a, suction muffler 3a, stator 4a, rotor 5a, crankshaft 6a, crankshaft bracket 7a, piston 8a, connecting rod 9a, cylinder 10a, valve seat 11a and cylinder head 12a , when the cylinder 10a is in the air intake process, the mass of the refrigerant actually sucked into the cylinder is often much smaller than the theoretically calculated value, resulting in a lower discharge cooling capacity

The main reason is that when inhaling, the suction valve of the valve seat 11a has been closed before the piston 8a reaches the bottom dead center, so that the refrigerant can no longer enter the cylinder 10a. Therefore, the theoretically calculated refrigerant value is not sucked into the cavity of the cylinder 10a At the same time, due to the existence of the clearance volume, when the exhaust is finished, some high-pressure gas still remains in the cylinder 10a, so the suction valve in the valve seat 11a can only be opened after the high-pressure gas becomes low pressure when inhaling. The air valve plate allows the refrigerant to enter the cylinder 10a, resulting in a shorter time for the refrigerant to enter the cylinder 10a, which easily leads to insufficient air intake

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