Cool water discharging method and a switch valve with cool water discharging function

1. A switch valve with a cool water discharging function, comprising:

a valve body,

a valve spool, and

a thermosensitive module disposed in the valve body, wherein:

the valve body is disposed with an inlet passage, a first outlet passage, and a second outlet passage,

the first outlet passage and the second outlet passage are configured to be respectively connected to the inlet passage,

the valve body is further disposed with a cool water discharging passage configured to be connected to the inlet passage,

a discharging hole connects the first outlet passage and the cool water discharging passage,

a cool water discharging clearance connects the second outlet passage and the cool water discharging passage,

when the valve spool is switched to a position such that the inlet passage is connected to the cool water discharging passage and the inlet passage is fluidly disconnected from the second outlet passage:

water flows into the cool water discharging passage through the inlet passage,

suction force generated by the water flowing to the cool water discharging passage from the inlet passage creates negative pressure that causes residual water from the second outlet passage to move into the cool water discharging passage through the cool water discharging clearance,

the water from the inlet passage and the residual water from the second outlet passage flow out from the cool water discharging passage and the discharging hole to mix with residual water from the first outlet passage to obtain mixed water,

the mixed water flows out from an outlet of the first outlet passage, and

when a temperature of the mixed water rises to a preset value, the thermosensitive module disconnects the discharging hole from the cool water discharging passage.

2. The switch valve with cool water discharging function according to claim 1 , wherein:

a check valve is provided movably in the second outlet passage,

and

when the valve spool is switched to a second position such that the inlet passage is connected to the second outlet passage and the inlet passage is disconnected from the first outlet passage and the cool water discharging passage, water flows into the second outlet passage through a one-way water hole in the check valve.

3. The switch valve with cool water discharging function according to claim 2 , further comprising:

a sealing ring, and

a spring configured to push the check valve to press on the sealing ring, wherein:

the cool water discharging clearance is formed between the check valve and an internal wall of the second outlet passage.

4. The switch valve with cool water discharging function according to claim 3 , wherein:

a joint is disposed in the second outlet passage,

the spring is disposed in the joint, and

the check valve is movably sleeved on the joint to cover the spring.

5. The switch valve with cool water discharging function according to claim 1 , wherein:

a speed-up passage is disposed at a front end of the cool water discharging passage,

the speed-up passage is connected to the inlet passage,

a water flowing area at a central portion of the speed-up passage is smaller than a water flowing area at a front end portion and a rear end portion of the speed-up passage, and

an air suction hole is connected to the rear end portion of the speed-up passage.

6. The switch valve with cool water discharging function according to claim 1 , wherein:

the thermosensitive module comprises a flexible stick and a port configured to open or close the discharging hole, and

the port is connected to the flexible stick.

7. The switch valve with cool water discharging function according to claim 6 , wherein:

the thermosensitive module is disposed in the cool water discharging passage,

when the temperature of the water in the cool water discharging passage is lower than the preset value, the flexible stick is situated in a contracting state and the port opens the discharging hole, and

when the temperature of the water in the cool water discharging passage is equal to or higher than the preset value, the flexible stick is situated in an extending state and the port closes the discharging hole.

8. The switch valve with cool water discharging function according to claim 7 , wherein:

the thermosensitive module further comprises a reset spring, and

one end of the flexible stick and one end of the reset spring are respectively disposed at two sides of the discharging hole to clamp the port.

9. The switch valve with cool water discharging function according to claim 8 , wherein:

the thermosensitive module further comprises a shaft sleeve base,

the shaft sleeve base is connected to an internal wall of the cool water discharging passage in a sealing manner,

the reset spring and the port are disposed in the shaft sleeve base,

a central portion of the port is disposed with a passage running through the port in an axial direction,

the flexible stick pushes the port to move in the axial direction, and

the shaft sleeve base is disposed with a gap corresponding to the discharging hole.

10. A method performed by a switch valve with a cool water discharging function, wherein:

the switch valve comprises:

a valve body,

a valve spool, and

a thermosensitive module disposed in the valve body, wherein:

the valve body is disposed with an inlet passage,

a first outlet passage and a second outlet passage are configured to be respectively connected to the inlet passage,

the valve body is further disposed with a cool water discharging passage configured to be connected to the inlet passage,

a discharging hole connects the first outlet passage and the cool water discharging passage,

an air suction hole connects the second outlet passage and the cool water discharging passage, and

the thermosensitive module is configured to open and close the discharging hole, and

the method comprises:

enabling discharging of cool water by fluidly disconnecting by the valve spool, the inlet passage from the second outlet passage and connecting the inlet passage to the cool water discharging passage, causing water to flow to the cool water discharging passage through the inlet passage,

generating suction force by the water flowing to the cool water discharging passage to create negative pressure that causes residual cool water in the second outlet passage to move into the cool water discharging passage through the air suction hole,

mixing water flowing through the discharging hole with residual cool water in the first outlet passage to obtain mixed water,

discharging the mixed water from an outlet of the first outlet passage, and

when a temperature of the mixed water rises to a preset value, closing, by the thermosensitive module, the discharging hole to end the discharging of the cool water.

11. The switch valve with cool water discharging function according to claim 9 , wherein:

the gap is between one end of the reset spring and the port in the axial direction.

12. The switch valve with cool water discharging function according to claim 9 , wherein the water flowing into the cool water discharging passage from the inlet passage creates a positive pressure to close an air suction hole between the cool water discharging passage and the cool water discharging clearance.