Control valve and manufacturing method therefor

A method for manufacturing a control valve, comprising:

• providing a valve core, a valve body, and a bottom cover, wherein the valve body comprises a side wall part, the control valve has a valve cavity, the side wall part forms at least part of the wall of the valve cavity, the valve core comprises a top plate, a bottom plate, a first block, and a valve-core shaft assembly, the top plate and the bottom plate are arranged along a height direction of the valve core, the valve-core shaft assembly comprises a transmission connection part, at least part of the transmission connection part is located on a side, facing away from the bottom plate, of the top plate, the valve body further comprises a top wall part and a second block, the top wall part is arranged close to one end of the side wall part, the top wall part has a through hole, which communicates with the valve cavity, and the other end of the side wall part has an opening communicating with the valve cavity;
• mounting the valve core into the valve cavity from the opening, and making at least part of the transmission connection part go through the through hole to be located outside the valve body, so as to allow the first block to abut against the second block and restrict the valve core from continuing to rotate towards the second block, when the valve core rotates to a predetermined position;
• and
• fixedly connecting the bottom cover to an end, away from the top wall part, of the side wall part, and arranging the bottom cover and the end, away from the top wall part, of the side wall part in a sealed manner,
• wherein the valve-core shaft assembly comprises a first valve-core shaft and a second valve-core shaft, the first valve-core shaft comprises a first connection part, the second valve-core shaft comprises a second connection part, a step part, and a transmission connection part, and the transmission connection part and the second connection part are arranged along a height direction of the second valve-core shaft, the step part is located on an outer peripheral side of the second connection part, and the step part has a step surface;
• after providing the valve core, the valve body, and the bottom cover, the method further comprises:
• assembling the first valve-core shaft, the second valve-core shaft, and a sealing ring to allow the first connection part to be in transmission connection the second connection part drive, wherein the sealing ring is mounted on an outer peripheral side of the second valve-core shaft and contacts the step surface or there is a gap between the sealing ring and the step surface.