Fluid circulating apparatus

A fluid circulating apparatus comprising:

• a reservoir housing having an internal space for storing a fluid and including a plurality of ports;
• a valve part communicating with the internal space of the reservoir housing and some ports, and allowing the fluid in the internal space to be circulated selectively to some or all of the ports;
• and
• a pump part disposed in the reservoir housing to be connected to the valve part, and pumping the fluid passed through the valve part,
• wherein the ports of the reservoir housing include a first port, a second port, and a third port,
• the first port is disposed on an upper side of the reservoir housing,
• the second port is disposed on a lower side of the reservoir housing, and
• the third port is open upward from a top of the reservoir housing,
• wherein the valve part includes a valve housing, a valve, and an actuator,
• the valve housing includes a first passage opened to the internal space, a second passage opened to the second port, and a third passage opened to the third port, and
• a rotation position of the valve is determined based on whether the actuator is operated, and each passage is thus opened and closed selectively,
• wherein the valve includes a plurality of first through holes disposed in an outer surface and a first through hole matching the first passage is always open to the first passage regardless of the rotation position of the valve, and a first through hole matching the second passage selectively opens and closes the second passage depending on the rotation position of the valve, and a second through hole disposed in an upper surface and constantly communicating with the third passage, and
• wherein the pump part is disposed above the valve housing, and communicates with the third port of the reservoir housing and the third passage of the valve housing.