Four-way valve and air conditioning system provided with same
View Patent ↗A four-way valve and an air conditioning system provided with same are provided. The four-way valve includes a valve body, a piston and a sealing member. The valve body is provided with a valve cavity. The piston is movably disposed in the valve cavity. The sealing member is disposed on the piston and at least a part of the sealing member fits against an inner wall of the valve cavity. The valve cavity is separated into a high-pressure chamber and a low-pressure chamber by the piston. The piston is provided with an air passage structure which is in communication with the sealing member, and the air passage structure is in communication with the high-pressure chamber. A medium in the high-pressure chamber is in contact with the sealing element through the air passage structure.
1 . A four-way valve comprising a valve body, a piston and two sealing members, the valve body having a valve cavity, the piston being movably disposed in the valve cavity, the two sealing members being disposed on the piston and at least a part of each of the two sealing members being capable of abutting against an inner wall of the valve cavity;
wherein the valve cavity is separated into a high-pressure chamber and a low-pressure chamber by the piston, the high-pressure chamber and the low-pressure chamber are mutually independent;
the piston is provided with only one first air passage, and the first air passage is in communication with the two sealing members and in communication with the high-pressure chamber, and a high-pressure medium in the high-pressure chamber is capable of pressing the two sealing members against the inner wall of the valve cavity through the first air passage;
two gaps are formed between the piston and the two sealing members on both sides of the piston correspondingly, the gap extends in an axial direction of the valve body, and two ends of the first air passage are both directly in communication with the two gaps; and
the first air passage extends from a sealing member on one side of the piston to the sealing member on the other side of the piston.
2 . The four-way valve of claim 1 , wherein the two sealing members are symmetrically provided on both sides of the piston, and the first air passage is in communication with the two sealing members and symmetrically provided on both sides of the piston relative to an axial direction of the piston.
3 . The four-way valve of claim 1 , wherein a mounting groove is provided on both sides of the piston and the sealing member is movably disposed in the mounting groove.
4 . The four-way valve of claim 3 , wherein an elastic member is provided between the sealing member and the piston, the elastic member is disposed within the mounting groove, and the elastic member is capable of providing a resilient force to the sealing member for movement toward an inner wall of the valve body.
5 . An air conditioning system comprising a compressor and a four-way valve of claim 1 .