A fluid management assembly, comprising a valve body and a first valve core, wherein the fluid management assembly further comprises a first chamber and a second chamber, a wall forming the second chamber comprises an inner wall of the valve body; in the second chamber a first port of a conduction pipe is arranged, and the first port of the conduction pipe faces the bottom wall of the second chamber; the first valve core is arranged in the first chamber, the first valve core is rotatable in the first chamber, the first valve core is provided with a conduction passage and a throttle passage, the fluid management assembly comprises a throttle chamber formed by the throttle passage, and the throttle chamber or the conduction passage is configured to communicate the first chamber with the second chamber; and wherein the fluid management assembly comprises a first flow passage, a second flow passage, a third flow passage and a fourth flow passage, the first flow passage, the second flow passage and the third flow passage have openings in an outer wall of the valve body, the first flow passage is in communication with the first chamber, and the conduction passage or the throttle chamber is configured to communicate the fourth flow passage with the first chamber; the second flow passage is in communication with the second chamber, and the third flow passage is provided with a first opening of the third flow passage in the wall of the second chamber, wherein the first flow passage is an inlet passage of the first chamber and a fluid enters the first chamber through the first flow passage, wherein an operation position of the first valve core at least includes a first operation position and a second operation position and is able to switch between the first operation position and a second operation position by rotating the first valve core in the first chamber, in the first operation position of the first valve core, the second chamber is not in communication with the first chamber, the fluid in the first chamber leaves the first chamber through the fourth flow passage, and enters the third flow passage, in the second operation position of the first valve core, the first chamber is in communication with the second chamber through the throttle passage, the fluid in the first chamber enters the second chamber after being throttled by the throttle passage, and the throttled fluid is gas-liquid separated in the second chamber into a gaseous fluid and a liquid fluid, the gaseous fluid enters the second flow passage through the conduction pipe and is discharged out of the fluid management assembly, and the liquid fluid enters the third flow passage through the first opening and is discharged out of the fluid management assembly through the third flow passage. the first valve core is arranged in the first chamber, the first valve core is rotatable in the first chamber, the first valve core is provided with a conduction passage and a throttle passage, the fluid management assembly comprises a throttle chamber formed by the throttle passage, and the throttle chamber or the conduction passage is configured to communicate the first chamber with the second chamber; and wherein the fluid management assembly comprises a first flow passage, a second flow passage, a third flow passage and a fourth flow passage, the first flow passage, the second flow passage and the third flow passage have openings in an outer wall of the valve body, the first flow passage is in communication with the first chamber, and the conduction passage or the throttle chamber is configured to communicate the fourth flow passage with the first chamber; the second flow passage is in communication with the second chamber, and the third flow passage is provided with a first opening of the third flow passage in the wall of the second chamber, wherein the first flow passage is an inlet passage of the first chamber and a fluid enters the first chamber through the first flow passage, wherein an operation position of the first valve core at least includes a first operation position and a second operation position and is able to switch between the first operation position and a second operation position by rotating the first valve core in the first chamber, in the first operation position of the first valve core, the second chamber is not in communication with the first chamber, the fluid in the first chamber leaves the first chamber through the fourth flow passage, and enters the third flow passage, in the second operation position of the first valve core, the first chamber is in communication with the second chamber through the throttle passage, the fluid in the first chamber enters the second chamber after being throttled by the throttle passage, and the throttled fluid is gas-liquid separated in the second chamber into a gaseous fluid and a liquid fluid, the gaseous fluid enters the second flow passage through the conduction pipe and is discharged out of the fluid management assembly, and the liquid fluid enters the third flow passage through the first opening and is discharged out of the fluid management assembly through the third flow passage.