Exhaust valve device, compressor and heat exchange equipment

Abstract

The invention relates to a gas exhaust valve device, a compressor and heat exchange equipment. The gas exhaust valve device comprises a gas exhaust valve base (6), a gas exhaust valve (5) and a gas exhaust valve spring (3), wherein the gas exhaust valve base (6) is provided with a gas exhaust opening (61) which is communicated with a to-be-exhausted cavity; the gas exhaust valve spring (3) is used for pressing the gas exhaust valve (5) and the gas exhaust valve base (6) against a housing corresponding to the to-be-exhausted cavity; the gas exhaust valve (5) is positioned between the gas exhaust valve spring (3) and the gas exhaust valve base (6); the gas exhaust valve (5) is an elastic sheet and is adhered on the end surface of the gas exhaust valve base (6) for sealing the gas exhaust opening (61), and lifts when pressure of the to-be-exhausted cavity is greater than a set value for opening the gas exhaust opening (61) for exhausting gas and closes the gas exhaust opening (61) after gas exhaustion is ended. The gas exhaust valve device can improve timely opening-closing performance of the valve, and can reduce gas exhaustion loss and dynamic leakage, so that effective gas exhaustion amount is improved, and efficiency of the compressor is further improved.

Description

technical field [0001] The invention relates to the technical field of compressors, in particular to an exhaust valve device, a compressor and heat exchange equipment. Background technique [0002] Compressor is an important part of heat exchange equipment. It is a mechanical device that can convert low-pressure gas into high-pressure gas. It sucks low-temperature and low-pressure refrigerant gas from the suction pipe, and drives the piston to compress it through the operation of the motor. , to discharge high-temperature and high-pressure refrigerant gas to the exhaust pipe to provide power for the heat exchange cycle, thereby realizing the refrigeration cycle of compression-condensation-expansion-evaporation. [0003] The exhaust process of the compressor is mainly controlled by the exhaust valve device. When the exhaust is required, the exhaust valve is opened, and the exhaust valve is closed after the exhaust is completed. The valve seat of the traditional reciprocating ...

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Problems solved by technology

[0006] However, the exhaust valve used in this type of compressor has the following problems: (1) the mass of the exhaust valve is relatively large, so that the inertial force of the valve is relatively large, resulting in poor timely opening and closing performance of the exhaust valve; (2) Due to the high stiffness of the exhaust valve, the pressure of the compression chamber has to overcome the spring force of the exhaust valve, which will cause excessive exhaust loss (see figure 2 The exhaust section of the working curve shown), the efficiency of the compressor is low; (3) The diameter of the exhaust port is equal to the diameter of the cylinder, and the size is large

As a result, the circumference of the leakage surface from the exhaust chamber to the compression chamber is large, and dynamic leakage is prone to occur, resulting in a large amount of clearance expansion (see figure 2 Expansion section of the shown working curve), which reduces the effective displacement of the compressor, making the cooling capacity low, which in turn leads to low compressor efficiency

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