Techniques of manufacturing fans and evase devices

Abstract

Manufacturing techniques and architectures directed to an improved fan device that can be integrated into an evase. Manufacturing techniques of an improved evase device can be designed with rounded corners that can facilitate, e.g., mitigation of reverse flow that traditionally grows back from corners of a transition from an axial fan to a rectangular duct.

1 . A method of fabricating an evase device, comprising:
 forming, by a device comprising a processor, a housing that encompasses a channel that extends in a longitudinal direction from a first side of the housing to a second side of the housing;   forming, by the device, a first opening in the housing that is situated at the first side of the housing, wherein the first opening is configured to receive a flow of a fluid discharged by a fan;   forming, by the device, a second opening in the housing that is situated at the second side of the housing, wherein the second opening is configured to discharge the flow of the fluid into a duct;   forming, by the device, rounded corners at the second side of the housing, wherein the rounded corners are determined to mitigate a reverse flow of the fluid at corners of the duct; and   forming, by the device, a central pod having a shape that is cylindrical over an entire length from the first opening to the second opening and is determined to reduce impact loss at the second opening.   
     
     
         2 . The method of  claim 1 , further comprising forming or assembling, by the device, an intermediate baffle situated in the channel. 
     
     
         3 . The method of  claim 2 , wherein the rounded corners are first rounded corners and the intermediate baffle is configured with second rounded corners that are determined to mitigate the reverse flow of the fluid. 
     
     
         4 . The method of  claim 1 , further comprising forming or assembling, by the device, the fan situated within the housing. 
     
     
         5 . The method of  claim 4 , further comprising forming or assembling, by the device, a motor of the fan that is situated within the channel. 
     
     
         6 . The method of  claim 4 , wherein the fan is an axial fan. 
     
     
         7 . The method of  claim 4 , wherein the fan is plenum fan. 
     
     
         8 . The method of  claim 4 , wherein, during the forming the first opening, the first opening is configured to have an annular shape with a diameter that matches an impeller hub diameter of the fan. 
     
     
         9 . The method of  claim 1 , wherein, during the forming the second opening, the second opening is configured to interface to a rectangular shaped duct. 
     
     
         10 . The method of  claim 9 , wherein the rectangular shaped duct has squared corners. 
     
     
         11 . The method of  claim 1 , wherein, during the forming the rounded corners that are determined to mitigate the reverse flow, a shape of the rounded corners is determined according to a Reynolds number calculation. 
     
     
         12 . The method of  claim 1 , wherein, during the forming the rounded corners that are determined to mitigate the reverse flow, a shape of the rounded corners is determined to reduce an impact loss in connection with a conversion of a velocity pressure of the fluid into a static pressure. 
     
     
         13 . The method of  claim 1 , further comprising forming or assembling a container for the evase device that is filled with a material that absorbs sound. 
     
     
         14 . A method of fabricating an evase fan device, comprising:
 forming, by a device comprising a processor, a housing that encompasses a channel that extends in a longitudinal direction from a first side of the housing to a second side of the housing;   forming, by the device, a fan device that is situated at the first side of the housing;   forming, by the device, a first opening in the housing that is situated at the first side of the housing, wherein the first opening is configured to receive a flow of a fluid discharged by the fan device;   forming, by the device, a second opening in the housing that is situated at the second side of the housing, wherein the second opening is configured to discharge the flow of the fluid into a duct;   forming, by the device, rounded corners at the second side of the housing, wherein the rounded corners are determined to mitigate a reverse flow of the fluid at corners of the duct; and   forming, by the device, a central pod having a shape that is cylindrical over an entire length between the first opening and the second opening, and is determined to reduce impact loss at the second opening.   
     
     
         15 . The method of  claim 14 , further comprising forming or assembling, by the device, an intermediate baffle situated in the channel. 
     
     
         16 . The method of  claim 15 , wherein the rounded corners are first rounded corners and the intermediate baffle is configured with second rounded corners that are determined to mitigate the reverse flow of the fluid. 
     
     
         17 . The method of  claim 14 , further comprising forming or assembling, by the device a motor of the fan device that is situated within the channel. 
     
     
         18 . The method of  claim 14 , further comprising forming or assembling, by the device a motor of the fan device that is situated outside the channel. 
     
     
         19 . A method of fabricating an evase fan device, comprising:
 forming, by a device comprising a processor, a housing that encompasses a channel that extends in a longitudinal direction from a first side of the housing to a second side of the housing;   forming, by the device, a fan device that is situated at the first side of the housing, wherein a motor of the fan device is situated within the channel;   forming, by the device, a first opening in the housing that is situated at the first side of the housing, wherein the first opening is configured to receive a flow of a fluid discharged by the fan device;   forming, by the device, a second opening in the housing that is situated at the second side of the housing, wherein the second opening is configured to discharge the flow of the fluid into a duct;   forming, by the device, rounded corners at the second side of the housing, wherein the rounded corners are determined to mitigate a reverse flow of the fluid at corners of the duct; and   forming, by the device, a central pod having a shape that is cylindrical over an entire length from the first opening to the second opening and is determined to reduce impact loss at the second opening.   
     
     
         20 . The method of  claim 14 , further comprising forming or assembling, by the device, an intermediate baffle situated in the channel.