Silencer and electronic equipment

Abstract

A silencer is disclosed that includes a housing having a flat enclosing shape and having formed therein a passage for silencing; and pores, being formed at the housing so as to be communicatively connected with the passage, into which a sound wave to be noise is introduced. The pores, being formed close to the periphery of the housing, are configured so that the sound wave travels in the planar direction of the housing.

1 . A silencer, comprising: 
 a housing having a flat enclosing shape and having formed therein a passage for silencing; and    one or more pores, being formed at said housing so as to be communicatively connected with said passage, into which a sound wave to be noise is introduced;    wherein said pores, being formed close to the periphery of said housing, are configured so that said sound wave to be noise travels in a planar direction of said housing.    
   
   
       2 . The silencer as claimed in  claim 1 , 
 wherein one or more partition plates for partitioning said housing in the thickness direction are provided so as to form within said housing plural of the passages in which said sound wave to be noise travels.    
   
   
       3 . The silencer as claimed in  claim 1 , 
 wherein a reflecting plate for reflecting toward said passage said sound wave to be noise is provided at said housing.    
   
   
       4 . The silencer as claimed in  claim 1 , 
 wherein said housing is made airproof except for positions at which said pores are formed.    
   
   
       5 . A silencer, comprising: 
 a housing having a flat enclosing shape and having formed therein an air layer for silencing; and    a plurality of pores, being formed at said housing so as to be communicatively connected with said air layer, into which a sound wave to be noise is introduced;    wherein said pores are configured so as to make height positions from a surface of said housing from which said pores open to differ.    
   
   
       6 . The silencer as claimed in  claim 5 , 
 wherein one or more pipes are provided at said pores so that by varying the lengths of said pipes, the height positions relative to the surface of said housing from which said pores open are varied.    
   
   
       7 . The silencer as claimed in  claim 5 , 
 wherein varying the wall thickness of said housing varies depths of said pores being formed at said housing.    
   
   
       8 . A silencer, comprising: 
 a housing having a flat enclosing shape and having formed therein an air layer for silencing; and    a plurality of pores, being formed at said housing so as to be communicatively connected with said air layer, into which sound wave to be noise is introduced;    wherein said pores are configured so as to make opening areas of said pores to differ.    
   
   
       9 . A silencer, comprising: 
 a housing having a flat enclosing shape and having formed therein an air layer for silencing;    one or more pores, being formed at said housing so as to be communicatively connected with said air layer, into which a sound wave to be noise is introduced; and    area-varying means for varying opening areas of said pores.    
   
   
       10 . The silencer as claimed in  claim 9 , 
 wherein said area-varying means is configured to vary, in order to make decreased opening areas, the opening areas of said pores when the speed of cooling air increases.    
   
   
       11 . A silencer, comprising: 
 a housing having a flat enclosing shape and having formed therein an air layer for silencing;    one or more pores, being formed at said housing so as to be communicatively connected with said air layer, into which a sound wave to be noise is introduced; and    shape-varying means for varying thickness of said housing.    
   
   
       12 . The silencer as claimed in  claim 11 , 
 wherein said shape-varying means is configured to decrease the thickness of said housing when the speed of cooling air increases.    
   
   
       13 . A silencer, comprising: 
 a housing having an enclosing shape and having formed therein an air layer for silencing; and    one or more inlet sections, being formed at said housing so as to be communicatively connected with said air layer, into which a sound wave to be noise is introduced;    wherein multiple fins for cooling having formed thereon one or more pores are provided within said housing.    
   
   
       14 . A silencer, comprising: 
 a housing having an enclosing shape and having formed therein an air layer for silencing; and    one or more inlet sections, being formed at said housing so as to be communicatively connected with said air layer, into which a sound wave to be noise is introduced;    wherein fins for cooling having formed one or more pores and fins for cooling not having formed one or more of the pores are juxtaposed; and    a shielding plate is provided at each end of a pair of said fin for cooling with pores and said fin for cooling without pores.    
   
   
       15 . Electronic equipment, including within an apparatus mainframe a fan for cooling and a silencer for silencing noise generated at said fan, 
 wherein the silencer comprises:    a housing having a flat enclosing shape and having formed therein a passage for silencing; and    one or more pores, being formed at said housing so as to be communicatively connected with said passage, into which a sound wave to be noise is introduced;    and wherein said pores, being formed close to the periphery of said housing, are configured so that said sound wave to be noise travels in a planar direction of said housing.    
   
   
       16 . The electronic equipment as claimed in  claim 15 , 
 wherein one or more partition plates for partitioning said housing in a thickness direction are provided so as to form within said housing plural of the passages in which said sound wave to be noise travels.    
   
   
       17 . The electronic equipment as claimed in  claim 15 , 
 wherein a reflecting plate for reflecting toward said passage said sound wave to be noise is provided at said housing.    
   
   
       18 . The electronic equipment as claimed in  claim 15 , 
 wherein said housing is made airproof except for positions at which said pores are formed.    
   
   
       19 . Electronic equipment, including within an apparatus mainframe a fan for cooling and a silencer for silencing noise generated at said fan, 
 wherein the silencer comprises:    a housing having a flat enclosing shape and having formed therein an air layer for silencing; and    a plurality of pores, being formed at said housing so as to be communicatively connected with said air layer, into which a sound wave to be noise is introduced;    and wherein said pores are configured so as to make height positions from a surface of said housing from which said pores open to differ.    
   
   
       20 . The electronic equipment as claimed in  claim 19 , 
 wherein one or more pipes are provided at said pores so that by varying the lengths of said pipes, the height positions relative to the surface of said housing from which said pores open are varied.    
   
   
       21 . The electronic equipment as claimed in  claim 19 , 
 wherein varying the wall thickness of said housing varies depths of said pores being formed at said housing.    
   
   
       22 . Electronic equipment, including within an apparatus mainframe a fan for cooling and a silencer for silencing noise generated at said fan, 
 wherein the silencer comprises:    a housing having a flat enclosing shape and having formed therein an air layer for silencing; and    a plurality of pores, being formed at said housing so as to be communicatively connected with said air layer, into which a sound wave to be noise is introduced;    and wherein said pores are configured so as to make opening areas of said pores to differ.    
   
   
       23 . Electronic equipment, including within an apparatus mainframe a fan for cooling and a silencer for silencing noise generated at said fan, 
 wherein the silencer comprises:    a housing having a flat enclosing shape and having formed therein an air layer for silencing;    one or more pores, being formed at said housing so as to be communicatively connected with said air layer, into which a sound wave to be noise is introduced; and    area-varying means for varying opening areas of said pores.    
   
   
       24 . The electronic equipment as claimed in  claim 23 , 
 wherein said area-varying means is configured to vary, in order to decrease said opening areas, the opening areas of said pores when the speed of cooling air increases.    
   
   
       25 . Electronic equipment, including within an apparatus mainframe a fan for cooling and a silencer for silencing noise generated at said fan, 
 wherein the silencer comprises:    a housing having a flat enclosing shape and having formed therein an air layer for silencing; and    one or more pores, being formed at said housing so as to be communicatively connected with said air layer, into which a sound wave to be noise is introduced; and    shape-varying means for varying thickness of said housing.    
   
   
       26 . The electronic equipment as claimed in  claim 25 , 
 wherein said shape-varying means is configured to decrease the thickness of said housing when the speed of cooling air increases.    
   
   
       27 . Electronic equipment, including within an apparatus mainframe a fan for cooling and a silencer for silencing noise generated at said fan, 
 wherein the silencer comprises:    a housing having an enclosing shape and having formed therein an air layer for silencing; and    one or more inlet sections, being formed at said housing so as to be communicatively connected with said air layer, into which a sound wave to be noise is introduced;    and wherein multiple fins for cooling having formed one or more pores are provided within said housing.    
   
   
       28 . Electronic equipment, including within an apparatus mainframe a fan for cooling and a silencer for silencing noise generated by said fan, the silencer comprising: 
 a housing having an enclosing shape and having formed therein an air layer for silencing; and    one or more inlet sections, being formed at said housing so as to be communicatively connected with said air layer, into which a sound wave to be noise is introduced;    wherein fins for cooling having formed one or more pores and fins for cooling not having formed one or more of the pores are juxtaposed; and    a shielding plate is provided at each end of a pair of said fins for cooling with pores and said fins for cooling without pores.