Vacuum cleaning device

Abstract

A vacuum cleaning device comprises a housing having a dirty air inlet and a clean air outlet. An airflow path extends between the dirty air inlet and the clean air outlet. A dust container is mounted to the housing wherein the airflow path goes through the dust container. A motor fan assembly is mounted in the housing and is configured to create an air flow along the airflow path in a blow mode and a suction mode. A controller is configured to control the motor fan assembly in the blow mode and the suction mode. The controller is configured to control the motor fan assembly to pulse the motor fan assembly at first fan speed when in the blow mode.

1 . A vacuum cleaning device comprising:
 a housing having a dirty air inlet and a clean air outlet and an airflow path between the dirty air inlet and the clean air outlet;   a dust container mounted to the housing wherein the airflow path goes through the dust container;   a motor fan assembly mounted in the housing configured, to create an air flow along the airflow path in a blow mode and a suction mode; and   a controller configured to control the motor fan assembly in the blow mode and the suction mode;   wherein the controller is configured to control the motor fan assembly to pulse the motor fan assembly at first fan speed when in the blow mode, and the motor fan assembly pulses by alternatingly increasing and decreasing the fan speed over time.   
     
     
         2 . The vacuum cleaning device according  claim 1  wherein the first fan speed is a maximum fan speed. 
     
     
         3 . The vacuum cleaning device according to  claim 1  wherein the controller is configured to pulse the motor fan assembly at the first fan speed for a first time period and a second fan speed for a second time period. 
     
     
         4 . The vacuum cleaning device according to  claim 3  wherein the first time period is between 600 ms-1000 ms. 
     
     
         5 . (canceled) 
     
     
         6 . The vacuum cleaning device according to  claim 3  wherein the second fan speed is less than the first fan speed. 
     
     
         7 . The vacuum cleaning device according to  claim 3  wherein the second fan speed is 20% of the first fan speed. 
     
     
         8 . (canceled) 
     
     
         9 . The vacuum cleaning device according to  claim 3  wherein the second time period is longer than the first time period. 
     
     
         10 . The vacuum cleaning device according to  claim 3  wherein the second time period is between 750 ms to 2000 ms. 
     
     
         11 . The vacuum cleaning device according to  claim 3  wherein the controller is configured to alternate pulsing the motor fan assembly between the first fan speed and the second fan speed. 
     
     
         12 . The vacuum cleaning device according to  claim 1  wherein the controller is configured to actuate an indicator during the blow mode. 
     
     
         13 . The vacuum cleaning device according to  claim 1  wherein the motor fan assembly is configured to generate an airflow from the dust container to the dirty air inlet in the blow mode. 
     
     
         14 . The vacuum cleaning device according to  claim 1  wherein the motor fan assembly is configured to generate an airflow from the dirty air inlet to the dust container in the suction mode. 
     
     
         15 . (canceled) 
     
     
         16 . The vacuum cleaning device according to  claim 1  wherein the controller is configured to control the motor fan assembly in a blow mode based on a signal received from a user actuated interface. 
     
     
         17 . The vacuum cleaning device according to  claim 16  wherein the user actuated interface is a button mounted on the housing.