Flow passage switching valve

A flow passage switching valve for switching a flow passage through which fluid flows or for opening or closing the flow passage, the valve comprising:

• a valve body that rotates around a valve axis and includes a valve body outer peripheral surface, which faces outward in a valve radial direction and extends to surround the valve axis, wherein the valve radial direction is a radial direction of the valve axis;
• a valve main body that includes:
• a valve chamber accommodating the valve body;
• and
• a main body inner peripheral surface opposed to the valve body outer peripheral surface and facing the valve chamber;
• and
• a resilient sealing member that is accommodated in the valve chamber and is placed outward of the valve body in the valve radial direction to be interposed between the valve body outer peripheral surface and the main body inner peripheral surface in the valve radial direction, wherein:
• the valve main body further includes a first opening hole and a second opening hole each passing through the valve main body from the valve chamber in the valve radial direction;
• the second opening hole is located side by side with the first opening hole in a circumferential direction of the valve axis;
• the valve body includes one or at least two valve body openings that open outward in the valve radial direction;
• the one or at least two valve body openings communicate with one of the first opening hole and the second opening hole in accordance with a rotation position of the valve body;
• the sealing member includes:
• a first sealing part and a second sealing part each being clamped between the valve body outer peripheral surface and the main body inner peripheral surface;
• and
• a joining part connecting together the first sealing part and the second sealing part;
• the first sealing part extends to surround a peripheral edge of the first opening hole on the main body inner peripheral surface side;
• when one opening of the one or at least two valve body openings communicates with the first opening hole, the first sealing part prevents a leak of the fluid flowing between the one opening and the first opening hole;
• the second sealing part extends to surround a peripheral edge of the second opening hole on the main body inner peripheral surface side;
• when the one opening of the one or at least two valve body openings communicates with the second opening hole, the second sealing part prevents a leak of the fluid flowing between the one opening and the second opening hole;
• the joining part includes a first joining end portion connected to the first sealing part and a second joining end portion connected to the second sealing part, and is placed at a position where a mutual interval between the first sealing part and the second sealing part is the smallest in the circumferential direction;
• and
• each of at least the first joining end portion and the second joining end portion of the joining part is pressed outward in the valve radial direction by the valve body outer peripheral surface to be resiliently deformed.