Backpack vacuum cleaner

Abstract

The present invention discloses a backpack vacuum cleaner, which includes a dust collection part, a base part, a vacuum electric fan and an air pressure alarm unit. The vacuum electric fan introduces dust-containing airflow into a dust collection bag from a dust inlet and guides air entering an exhaust space to an exhaust port. An air pressure detection element arranged in the tank detects the pressure in the exhaust space. The alarm sends an alarm signal to the outside and can decide whether to give an alarm to the outside based on a detection result of the air pressure detection element.

1 . A backpack vacuum cleaner, comprising:
 a dust collection part comprising a tank with a dust inlet, wherein a dust collection container and a high-efficiency filter are mounted inside the tank, the dust collection container comprises a dust collection bag made of a breathable material, the high-efficiency filter is cylindrical and sleeved outside the dust collection bag, and an exhaust space is arranged between the high-efficiency filter and an inner wall surface of the tank; the dust inlet, the dust collection bag, the high-efficiency filter and the exhaust space are sequentially communicated; the tank comprises a tank body with a hollow internal structure and an openable tank cover mounted on the top of the tank body, and the dust inlet is arranged on the tank cover; a short air inlet pipe communicated with the dust inlet is arranged at the bottom of the tank cover and extends downwards from the dust inlet, and a tail end of the short air inlet pipe extends into the dust collection bag;   a base part comprising a housing adjoining below the tank, an exhaust port communicated with the outside being arranged on the housing;   a vacuum electric fan for introducing dust-containing airflow into the dust collection bag from the dust inlet and guiding air entering the exhaust space to the exhaust port;   an air pressure alarm unit comprising an air pressure detection element arranged on the tank and used for detecting pressure in the exhaust space and an alarm used for sending an alarm signal to the outside, wherein the alarm can decide whether to send an alarm signal to the outside based on a detection result of the air pressure detection element; the air pressure detection element comprises an air pressure sensor, an air pressure processing chip and an air pressure sensing switch, the air pressure sensor detects the pressure in the exhaust space and outputs pressure data to the air pressure processing chip, and the air pressure processing chip outputs corresponding electrical signals to the air pressure sensing switch; and the air pressure sensing switch and the alarm are connected in series in an alarm circuit.   
     
     
         2 . The backpack vacuum cleaner according to  claim 1 , wherein the alarm comprises a warning light and/or a buzzer arranged on the housing. 
     
     
         3 . The backpack vacuum cleaner according to  claim 1 , wherein a hook is arranged on the tank body, a circumferential slot is arranged on an outer edge of the tank cover, and the tank cover is fixed to an upper part of the tank body by the hook being clamped in the slot. 
     
     
         4 . The backpack vacuum cleaner according to  claim 1 , wherein a hole communicated with the exhaust space is formed in a wall of the tank, and the air pressure detection element is assembled at the hole. 
     
     
         5 . The backpack vacuum cleaner according to  claim 1 , wherein the housing and the tank are integrally provided. 
     
     
         6 . The backpack vacuum cleaner according to  claim 1 , wherein the vacuum electric fan comprises an impeller assembly and a motor for driving the impeller assembly to rotate to generate a negative pressure, the motor is arranged in the housing, and the impeller assembly is arranged in the tank and/or the housing. 
     
     
         7 . The backpack vacuum cleaner according to  claim 1 , wherein the high-efficiency filter has a first vertical centerline extending in an up-down direction, and the dust collection bag has a second vertical centerline extending in the up-down direction, and the first vertical centerline coincides with the second vertical centerline. 
     
     
         8 . The backpack vacuum cleaner according to  claim 1 , wherein the dust collection bag has a double-layer dust bag structure, the dust bag in an inner layer is a disposable paper dust bag that is easy to replace, and the dust bag in an outer layer is a cloth dust bag reusable after cleaning. 
     
     
         9 . The backpack vacuum cleaner according to  claim 8 , wherein the cloth dust bag consists of two surface layers of non-woven fabrics and a cotton core sandwiched therebetween. 
     
     
         10 . The backpack vacuum cleaner according to  claim 1 , wherein the high-efficiency filter comprises a cylindrical filter element which is circumferentially formed in a pleated and folded manner and a support member fixed on an outer side and/or an inner side of the cylindrical filter element. 
     
     
         11 . The backpack vacuum cleaner according to  claim 10 , wherein the support member comprises a pair of cylindrical support meshes, and the cylindrical filter element in a pleated form is sandwiched between the pair of support meshes. 
     
     
         12 . The backpack vacuum cleaner according to  claim 11 , wherein the support meshes are made of a stretched metal mesh. 
     
     
         13 . The backpack vacuum cleaner according to  claim 11 , wherein the support meshes are edge-sealed and fixed at seams with smooth splicing strips. 
     
     
         14 . The backpack vacuum cleaner according to  claim 11 , wherein the high-efficiency filter is further provided with a bottom cover fixed at the bottom of the support meshes, and the high-efficiency filter forms a cylindrical structure with an open upper part and a sealed lower part. 
     
     
         15 . The backpack vacuum cleaner according to  claim 8 , wherein an upper end of the paper dust bag is provided with a mounting plate extending radially outward, each of the cloth dust bag and the high-efficiency filter is fixedly provided with a bezel at an upper edge, and sealing gaskets are also arranged between the bezel of the high-efficiency filter and the tank body, and between the bezel of the high-efficiency filter and the mounting plate of the paper dust bag. 
     
     
         16 . The backpack vacuum cleaner according to  claim 1 , wherein an upper edge of the dust collection container and the upper edge of the high-efficiency filter are clamped and fixed between the tank cover and the tank body. 
     
     
         17 . The backpack vacuum cleaner according to  claim 1 , further comprising a back-carrying system arranged on the tank and/or the housing and a rechargeable battery pack for supplying power to the vacuum electric fan.