Intake protection device and cleaning device having such a suction protection device

Abstract

A suction protection device for an air duct arrangement between a liquid collection area and a negative pressure source of a cleaning device is disclosed. The suction protection device includes a sealing body, sealing the air duct arrangement when positioned in its closed position and releasing the air duct arrangement when positioned in its open position to suck air out of the liquid collection area. The suction protection device further includes a load actuator configured to generate a pulling load via which the sealing body may be forced into the closed position and/or the open position.

1 . A suction protection device for an air duct arrangement between a liquid collection area and a negative pressure source of a cleaning device comprising:
 a sealing body, sealing the air duct arrangement when positioned in a closed position and releasing the air duct arrangement when positioned in an open position to suck air out of the liquid collection area and   a load actuator to generate a pulling load via which the sealing body is capable of being forced into the closed position and/or the open position.   
     
     
         2 . The suction protection device according to  claim 1 , wherein the sealing body seals the air duct arrangement in its closed position such that liquid and preferably air are prevented from flowing from the liquid collection area to the negative pressure source. 
     
     
         3 . The suction protection device according to  claim 1 , wherein the load actuator is configured to force the sealing body into the closed position and/or the open position, depending on:
 another load being applied to the sealing body; and/or   a position of the sealing body relative to the load actuator; and/or   a position of the sealing body relative to the open position and/or the closed position.   
     
     
         4 . The suction protection device according to  claim 1 , wherein the load actuator may be activated and/or or deactivated; and wherein an amount of the pulling load of the load actuator may be adjustable. 
     
     
         5 . The suction protection device to according to  claim 1 , further comprising a detection device to generate a signal, wherein, based on the signal:
 the load actuator may be activated and/or deactivated to generate pulling load; and/or   the load actuator may be controllable to generate pulling load; and/or   another force may be changeable by the sealing body; and/or   the position of the sealing body may be changeable relative to the load actuator; and/or   the negative pressure source may be controllable.   
     
     
         6 . The suction protection device according to  claim 5 , wherein the detection device comprises at least an actuatable switch to generate the signal. 
     
     
         7 . The suction protection device according to  claim 5 , wherein the detection device comprises at least one sensor configured to generate the signal, wherein the sensor is:
 a filling level sensor to detect a liquid level in the liquid collection area; and/or   an inclination sensor to detect an inclination of the liquid collection area; and/or   a pressure sensor to detect pressure in at least either the liquid collection area, the air duct arrangement and the negative pressure source; and/or   a sensor to detect an operating position of the cleaning device.   
     
     
         8 . The suction protection device according to  claim 1 , wherein the load actuator is configured in such a way that the pulling load decreases or increases with increasing distance of the sealing body to the closed position and/or increases or decreases with increasing distance to the open position, wherein preferably the load decrease or increase proceeds disproportionately with the distance. 
     
     
         9 . The suction protection device according to  claim 1 , wherein the pulling load of the load actuator comprises a magnetic force. 
     
     
         10 . The suction protection device according to  claim 1 , wherein the load actuator comprises a mechanical pulling mechanism to generate the pulling load, wherein the mechanical pulling mechanism preferably comprises a hydraulically and/or pneumatically and/or electrically actuatable pulling load. 
     
     
         11 . The suction protection device according to  claim 1 , wherein a suction force, which is being generated in an operative state via the negative pressure source and which is being applied to the sealing body is, at least partially:
 applied in the direction of the closed position or the open position; and/or   applied in the direction or against the pulling load of the load actuator.   
     
     
         12 . A floor cleaning device for wet cleaning a cleaning surface, comprising:
 a liquid collection container with a liquid collection area to collect a liquid, sucked from a cleaning surface;   an air duct arrangement;   a negative pressure source configured to suck air from the liquid collection area via the air duct arrangement in an operative state, wherein the liquid collection area is underpressurized to suck the liquid; and   a suction protection device according to  claim 1 .   
     
     
         13 . The cleaning device according to  claim 12 , further comprising a guide member to guide the cleaning device, wherein the liquid collection container is disposed on the guide member and is, together with the guide member, adjustable in its length, in particular pivotable, or wherein the liquid collection container at least partly forms the guide member. 
     
     
         14 . The cleaning device according to  claim 13 , further comprising:
 a cleaning unit, and   a joint assembly, which at least comprises a pivot axis and with which the guide member is articulately and about its longitudinal axis connected to the cleaning unit in a torque-transmitting manner.   
     
     
         15 . The cleaning device according to  claim 14 , further comprising at least a tool that is assigned to the cleaning unit and is configured to rest at least in sections on the cleaning surface in an operative state.