Bladeless fan

Abstract

The present disclosure relates to a bladeless fan, which includes a housing and a power device, wherein the power device communicates with a fluid passage and a negative pressure passage disposed in the housing respectively; the fluid passage communicates with the outside through a plurality of exhaust ports, and the negative pressure communicates with the outside through a plurality of suction ports; a middle region inside the fluid passage is provided with a spoiler device so that a path along which the fluid passes through the spoiler device is larger than a path along which the fluid passes around the corresponding inner wall, thereby generating a pressure difference. The present disclosure enables a higher-speed flow of the fluid inside the fluid passage through pressure difference without adding extra power, and generates a faster air speed in a more energy-saving way, thereby achieving a remarkable effect of cooling.

What is claimed is: 
     
         1 . A bladeless fan, comprising a housing and a power device, wherein the power device communicates with a fluid passage and a negative pressure passage disposed in the housing respectively; the fluid passage communicates with the outside through a plurality of exhaust ports, and the negative pressure communicates with the outside through a plurality of suction ports; a middle region inside the fluid passage is provided with a spoiler device so that a path along which the fluid passes through the spoiler device is larger than a path along which the fluid passes around the corresponding inner wall, thereby generating a pressure difference. 
     
     
         2 . The bladeless fan according to  claim 1 , wherein a middle region inside the fluid passage is provided with a spoiler device so that a high pressure around the inner wall of the fluid passage transfers a pressure difference to a low pressure generated in the middle region, which reduces the frictional force around the inner wall of the fluid passage and converts the pressure around the inner wall into a driving force inside the fluid passage. 
     
     
         3 . The bladeless fan according to  claim 1 , wherein the fluid passage disposed in a side face in the front-rear direction of the housing communicates with the outside through a plurality of uniformly distributed exhaust ports, and the negative pressure passage disposed in the other side face of the housing communicates with the outside through a plurality of uniformly distributed suction ports. 
     
     
         4 . The bladeless fan according to  claim 1 , wherein the spoiler device is a spoiler face that is concave or convex on the surface thereof, the spoiler face is curved, triangular, trapezoidal or spiral, and the spoiler face extends the fluid passage path. 
     
     
         5 . The bladeless fan according to  claim 1 , wherein the shape of the housing is one of the following shapes: diamond shape, pyramid shape, rhombus shape, olive shape, square shape, rectangular shape, triangular shape, curved shape, spherical shape, circular shape or elliptical shape; and the turning portion inside the fluid passage is curved. 
     
     
         6 . The bladeless fan according to  claim 1 , further comprising a base; wherein the power device is disposed inside the base, an exhaust end of the power device communicates with the fluid passage through a conduit, and a suction end of the power device communicates with the negative pressure passage through the conduit. 
     
     
         7 . The bladeless fan according to  claim 5 , wherein the shape of the housing is one of the following shapes: diamond shape, pyramid shape, rhombus shape, olive shape, square shape, rectangular shape or triangular shape; and the fluid passage inside the housing is circular or elliptical or curved. 
     
     
         8 . A bladeless fan, comprising a housing and a power device, wherein at least one fluid passage disposed in the housing communicates with the outside through a plurality of exhaust ports, the exhaust ports are disposed in at least one of a front side face, a rear side face, a left side face and a right side face of the housing, and the power device communicates with the exhaust ports through the fluid passage; a middle region inside the fluid passage is provided with a spoiler device so that a path along which the fluid passes through the spoiler device is larger than a path along which the fluid passes around the corresponding inner wall, thereby generating a pressure difference. 
     
     
         9 . The bladeless fan according to  claim 8 , wherein the spoiler device is a spoiler face that is concave or convex on the surface thereof, the spoiler face is curved, triangular, trapezoidal or spiral, and the spoiler face extends the fluid passage path; the shape of the housing is one of the following shapes: diamond shape, pyramid shape, rhombus shape, olive shape, square shape, rectangular shape, triangular shape, curved shape, spherical shape, circular shape or elliptical shape; and the turning portion inside the fluid passage is curved. 
     
     
         10 . The bladeless fan according to  claim 8 , wherein the power device is disposed inside the housing, an exhaust end of the power device communicates with the exhaust ports of the fluid passage through a conduit, and a suction end of the power device communicates with the outside through suction ports disposed in the housing; the at least one fluid passage communicates with each other to form a pressure from high to low inside the fluid passage and to gradually transfer a pressure difference.