Rotary valve

Abstract

The invention discloses a rotary valve, which comprises a stator, a rotor arranged in the stator, a driving mechanism for driving the rotor to rotate, and a sealing cover connected with the stator; a small gap exists between the stator and the rotor; a gas channel is arranged in the rotor; a high pressure gas buffer chamber and a low pressure gas buffer chamber are arranged in the circumferentialdirection of the rotor, and are respectively provided with a notch; the circumferential direction of the rotor is also provided with a groove communicated with the gas channel; and the stator is provided with a high pressure gas inlet communicated with the high pressure gas buffer chamber, a low pressure gas inlet communicated with the low pressure gas buffer chamber, and a gas trough communicated with the groove. The rotary valve can reduce the switching resistance between high pressure and low pressure in the rotary valve, improves switching efficiency, reduces the complexity of a rotary valve system, and has reliable operation, long service life and low noise.

Description

technical field [0001] The invention relates to the field of refrigerator manufacturing, in particular to a contactless rotary valve. Background technique [0002] In the regenerative refrigerator system, the rotary valve is used to switch between high pressure and low pressure in the gas flow channel to form the stable fluctuating pressure required for the refrigerator to work. The rotary valves in early refrigerators were contact rotary valves, often called planar rotary valves. Due to the need for sealing, the rotor end face of the planar rotary valve is in close contact with the stator, which will not only cause problems such as high motor power and large volume and mass of the rotary valve, but also cause wear and tear due to the mechanical contact between the rotor and the stator. , the worn-out particles will not only reduce the life of the rotary valve, but also enter the refrigerator with the airflow, affecting the performance of the refrigerator. [0003] The app...

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Problems solved by technology

[0004] However, the non-contact rotary valve in the prior art also has defects: the structure of the rotary valve has a large switching resistance when switching between high pressure and low pressure; in order to keep the balance and stability of the rotary valve in operation, the rotary valve uses two high-pressure intake The method of symmetrically setting the air inlet and two low-pressure air inlets increases the number and complexity of the air inlet pipes; when the rotation frequency of the motor itself is constant, increasing the switching frequency between high pressure and low pressure must rely on increasing the high pressure air inlet and the number of low-pressure inlets, which further increases the complexity of the inlet piping

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