Combination suction regulator for medical use

1. A combination suction regulator for medical use which comprises a cover, a vacuum gauge, a regulating module, an integrated flow channel module having a plurality of board surface flow channels, an intermittent timer, a mode select switch, a vacuum relief and an air buffer, wherein:

A. the air buffer is disposed inside the cover and integrally formed as a whole with the integrated flow channel module, there are two air holes disposed on a left and on a right side of a bottom part of the air buffer for communicating with the board surface flow channels that are susceptible to interference in the integrated flow channel module;

B. a flow channel board and a bottom board are coupled with each other to form the integrated flow channel module; the bottom board has a probe/adapter port at a middle part thereof which connects with an input vacuum source via a threaded connecting inlet, and three timer regulating needle valves on a board surface thereof for communicating with the corresponding board surface flow channels and adjusting the intermittent timer on and off; the flow channel board has a front side and a back side; the front side of the flow channel board has a pole at an upper end thereof for installing the mode select switch, and four to six board surface flow channel connection holes for communicating with the board surface flow channels on the flow channel board; in a middle part of the front side of the flow channel board, a metal pole, a timer channel hole and a valve seat of a change valve are disposed which are all connected to the intermittent timer; in a lower part of the front side of the flow channel board, a sleeve seat for installing the regulating module is disposed, which has mouths communicating with the board surface flow channels; and a threaded fitting port at a bottom part of the flow channel board forms an outlet of the suction regulator;

C. the intermittent timer comprises a diaphragm piston disposed on one side and the change valve disposed on another side of the middle part of the front side of the flow channel board; the diaphragm piston comprises a body, a diaphragm, a return spring and piston rod; the change valve comprises a connecting rod, a crank and a torsion spring, a valve plate and the valve seat disposed in the middle part of the front side of the flow channel board; the diaphragm piston connects to and controls the change valve through the piston rod.

2. The combination suction regulator for medical use as in claim 1 , wherein the front side of the flow channel board has six board surface flow channel connection holes Sf 1 -Sf 6 at the upper end thereof, and the back side of the flow channel board has six corresponding board surface flow channel connection holes Sb 1 -Sb 6 .

3. The combination suction regulator for medical use as in claim 1 , wherein one side of the mode select switch has mode select switch flow channels S 1 , S 2 , which form a mode selector with the board surface flow channel connection holes Sf 1 -Sf 6 of the flow channel board.

4. The combination suction regulator for medical use as in claim 1 , wherein the valve seat of the change valve has six valve channel holes Qf 1 -Qf 6 in the middle part of the front side of the flow channel board and six corresponding valve channel holes Qb 1 -Qb 6 on the back side of the flow channel board.

5. The combination suction regulator for medical use as in claim 1 , wherein the valve plate of the change valve has change valve flow channels C 1 , C 2 , C 3 which form the change valve with the six valve channel holes Qf 1 -Qf 6 on the valve seat.

6. The combination suction regulator for medical use as in claim 1 , wherein three timer regulating needle valves (T 0 ,T 1 ,T 2 ) are on a back of the integrated flow channel module and used for communicating with the corresponding board surface flow channels to adjust time of the intermittent timer.