Valve

1. A valve, comprising a valve body and a valve core disk, wherein the valve body is provided with a passage configured for allowing a fluid to pass through; the valve core disk is provided within the passage and is rotatable with respect to the valve body; the valve core disk is provided with through holes, one side face of the valve core disk is provided with a one-way diaphragm, and the one-way diaphragm is configured for sealing the through holes in one direction, so as to enable the valve core disk to seal the passage in one direction; the valve core disk and a section of the passage both are in a circular shape; on an outer circumferential surface of the valve core disk, an annular slot is provided along an extending direction of the outer circumferential surface; a seal ring is provided in the annular slot; the seal ring is in interference fit with a side wall of the passage, so as to fill in a gap between the valve core disk and the side wall of the passage, and to enable the valve core disk to universally rotate with respect to the valve body.

2. The valve according to claim 1 , wherein a blocking part is provided at an opening at one end of the valve body; the blocking part is a hollow housing with one end opened, and the blocking part is in a hollowed-out shape.

3. The valve according to claim 1 , further comprising an upper cover, wherein the upper cover is provided on an end port of the valve body for sealing the passage.

4. The valve according to claim 1 , wherein the valve core disk is provided with a plurality of the through holes, and the plurality of the through holes are distributed on the valve core disk, forming a circular shape whose circle center is at a circle center of the valve core disk; and a central portion of the one-way diaphragm is fixedly connected with a central portion of the valve core disk.

5. The valve according to claim 4 , wherein a one-way diaphragm connecting rod is provided at a center of the one-way diaphragm, and the one-way diaphragm connecting rod is perpendicular to the one-way diaphragm; and the valve core disk has a center provided with a clamping hole for clamping the one-way diaphragm connecting rod.

6. The valve according to claim 4 , wherein the through holes are in a fan shape, and a circle center of the fan shape is close to the circle center of the valve core disk; a stop block is provided on an arc-shaped edge of each of the through holes, and the stop blocks are configured to block the one-way diaphragm.

7. The valve according to claim 3 , further comprising a base, wherein the base is provided with a mounting hole for mounting the valve body.

8. The valve according to claim 7 , wherein the upper cover is provided with a connecting sheet, and an annular baffle is provided on an edge of one end of the valve body close to the upper cover;

the base is provided with a recess for receiving the connecting sheet; and the annular baffle is configured to fix the connecting sheet in the recess.

9. The valve according to claim 7 , wherein the upper cover and the base are connected through a connecting belt, and the upper cover, the base and the connecting belt are designed to be integrated.

10. The valve according to claim 1 , wherein the valve body is divided into upper and lower parts and the valve body is formed by assembling the upper and lower parts.

11. The valve according to claim 10 , wherein the valve core disk and the seal ring are assembled and then mounted into the upper and lower parts of the valve body, and a diameter of an opening of the upper part is smaller than size of the valve core disk, such that it is not easy to remove the valve core disk in use.