Pressure-fed vacuum swimming pool cleaning robot

1. An automatic swimming pool cleaning robot, comprising

a body terminated by a suction head;

an astable valve housed in the body;

a suction pipe having a lengthwise section and including a first lower end and a second upper end, the first lower end being attached to the body and connected to the suction head via the astable valve, the astable valve being put in motion by vacuum generated by a vacuum source and discontinuously putting the suction head in communication with the second upper end of the suction pipe;

a recuperation filter that, during operation, is selectively connected to the second upper end of the suction pipe; and

a venturi injector installed on the lengthwise section of the suction pipe on the second upper end of the suction pipe, the venturi injector including an inlet orifice and an outlet nozzle, the venturi injector presenting the inlet orifice exterior to the suction pipe, and including the outlet nozzle interior to the suction pipe and pointing approximately in the direction of suction, the inlet orifice, during operation, being selectively connected to a pressurized water source, wherein the venturi injector forms the vacuum source during operation;

and a plug selectively sealing the inlet orifice, wherein the recuperating filter is removably connected to the second upper end of the suction pipe and when the filter is removed and the plug seals the inlet orifice of the injector, the robot can also be operated by connecting the second upper end of the suction pipe to an external vacuum source.

2. The robot according to claim 1 , wherein the suction pipe includes two passages connected to the body at the first lower end of the suction pipe and the robot further comprises:

a connection with three mutually communicating branches, the branches being two lateral branches and a central branch, the two lateral branches connecting the two passages to each other and to the central branch; and

a common conduit connecting the central branch to the second upper end of the suction pipe, wherein the injector is installed on the common conduit.

3. The robot according to claim 2 , wherein the astable valve includes at least a first seat subject to the vacuum and a pivoting closing element, the closing element pivoting between a closed position in which it seals the first seat, and a disengaged position in which it is released from the first seat, and in which the closing element, at least when it reaches either the closed or the disengaged position, is drawn to the other of said positions.

4. The robot according to claim 1 , wherein the astable valve includes at least a first seat subject to the vacuum and a pivoting closing element, the closing element pivoting between a closed position in which it seals the first seat, and a disengaged position in which it is released from the first seat, and in which the closing element, at least when it reaches either the closed or disengaged position, is drawn to the other of said positions.

5. The robot according to claim 1 , wherein the plug seals the inlet orifice of the injector and the second upper end of the pipe is connected to an external vacuum source.

6. The robot according to claim 1 , wherein the plug seals the inlet orifice of the injector, the filter is removed from the second upper end of the suction pipe and the second upper end of the pipe is connected to an external vacuum source.

7. The robot according to claim 1 wherein the astable valve comprises a wedge hammer.

8. An automatic swimming pool cleaning robot, comprising

a body terminated by a suction head;

an astable valve housed in the body;

a suction pipe having a lengthwise section and including a first lower end and a second upper end, the first lower end being attached to the body and connected to the suction head via the astable valve and the suction pipe includes two passages connected to the body at the first lower end of the suction pipe, the astable valve being put in motion by vacuum generated by a vacuum source and discontinuously putting the suction head in communication with the second upper end of the suction pipe;

a recuperation filter that, during operation, is selectively connected to the second upper end of the suction pipe; and

a venturi injector installed on the lengthwise section of the suction pipe on the second upper end of the suction pipe, the venturi injector including an inlet orifice and an outlet nozzle, the venturi injector presenting the inlet orifice exterior to the suction pipe, and including the outlet nozzle interior to the suction pipe and pointing approximately in the direction of suction, the inlet orifice, during operation, being selectively connected to a pressurized water source, wherein the venturi injector forms the vacuum source during operation;

a plug selectively sealing the inlet orifice, wherein the recuperating filter is removably connected to the second upper end of the suction pipe so that the robot may also be operated by sealing the inlet orifice of the injector and connecting the second upper end of the suction pipe to an external vacuum source;

a connection with three mutually communicating branches, the branches being two lateral branches and a central branch, the two lateral branches connecting the two passages to each other and to the central branch; and

a common conduit connecting the central branch to the second upper end of the suction pipe, wherein the injector is installed on the common conduit.

9. The robot according to claim 8 , wherein the astable valve includes at least a first seat subject to the vacuum and a pivoting closing element, the closing element pivoting between a closed position in which it seals the first seat, and a disengaged position in which it is released from the first seat, and in which the closing element, at least when it reaches either the closed or the disengaged position, is drawn to the other of said positions.