JP5217893B2 - Blower with silencer box - Google Patents

Description

  The present invention relates to a fan with a sound deadening box that is used by fixing a power terminal block such as a ventilation fan.

  Conventionally, as this type of fan with a sound deadening box, a centrifugal fan is arranged in the duct-like body, a partition on the suction side and the discharge side is provided, and an inverter for connecting a power source is not an air air passage inside the duct-like body (For example, refer to Patent Document 1).

  Hereinafter, the blower with the sound deadening box will be described with reference to FIGS. 9 and 10.

As shown in FIGS. 9 and 10, a box-shaped duct body 101, a suction duct 103 at a body suction inlet 102 on the side for sucking indoor air, and a blow-out side at a body outlet 104 on the side for blowing air outside the room A duct 105 is connected and a centrifugal blower 106 is arranged inside the duct-like airframe 101. The centrifugal blower 106 includes a casing side plate 110 provided with a discharge port 107, a spiral scroll 108, and a casing suction port 109 on one side. The impeller 111 is driven by a rotating shaft 113 of a motor 112 that is fixed in the vicinity of the casing suction port 109. In the duct-shaped airframe 101, a partition 116 that partitions the suction-side airflow path 114 and the discharge-side airflow path 115 is provided, and the inverter 117 that also serves as a power supply terminal block for power connection is connected to the air-flow path inside the duct-shaped airframe 101. It is accommodated in the space 118 on the top surface side of the scroll 108 of the centrifugal blower 106 which is not a part. An inspection opening 119 is provided on the side surface of the duct-shaped airframe 101 facing the motor 112.

  When the centrifugal blower 106 is operated, the air flows through the suction duct 103, flows through the suction air passage 114 along the partition 116, passes through the scroll 108 from the casing suction port 109 of the centrifugal blower 106, and then discharges the wind. It flows along the path 115 along the partition 116, and flows out from the outlet duct 105.

JP 2000-314398 A

  In such a conventional blower with a sound deadening box, the inverter 117 is installed in the top surface space 118 of the scroll 108 of the centrifugal blower 106, which is not the air air passage, and therefore the suction side air passage 114 and the discharge side air passage 115. It is necessary to provide a partition 116 for partitioning, and the structure is complicated. Further, the outer size of the duct-shaped airframe 101 is increased in order to secure the top surface side space 118. In addition, the inverter 117 that also serves as a power supply terminal block for power connection is arranged on a different surface from the inspection opening 119, which requires work from two directions and is poor in maintainability. In the installation space, the space on the top surface side is reduced, and the workability to the power terminal block of the inverter 117 arranged on the top surface is poor. In addition, if the external size of the duct-like machine body 101 is to be reduced while ensuring the maintainability and the workability of the power supply connection, the inverter 117 will be arranged in the duct-like machine body 101 on the surface on the inspection opening 119 side, There is a problem that the top surface side space 118 by the partition 116 becomes a useless space.

  The present invention solves such a conventional problem, by projecting a terminal block base cover provided with a terminal block base to which a power supply terminal block is fixed, toward a front air passage on a casing side plate on the motor side, The outer size of the machine body can be reduced, and a decrease in air volume due to an air current collision with the terminal block base cover when the terminal block base cover is disposed in the machine body can be suppressed. In addition, by providing an air layer between the terminal block base and the casing side plate front air passage with the terminal block base cover, heat transfer to the terminal block base due to the internal gas temperature is suppressed, and condensation in the terminal block base is prevented. It aims at providing the air blower with a silencer box to suppress.

Deadening box of the present invention, in order to achieve the above object, it comprises a double inlet centrifugal fan inside the box-shaped body which is provided to face the body inlet port and body outlet, the double inlet centrifugal blower comprises a casing side plate provided with the discharge port and spiral scroll and the casing inlet on both sides, driven by a rotary shaft of a motor with a fixed impeller near the casing inlet, provided with the motor the A blower with a muffler box provided with an inspection opening on the side of the machine body facing the casing suction port ,
To the body side face of the inspection opening in the same plane, comprising a box-type terminal block base of such projecting the machine body inner side, the power terminal block fixed to the inside of the terminal block base, said terminal block base A terminal block base cover is provided so as to cover and cover a space between the terminal block base and the terminal block base. It is the structure which is arrange | positioned between the said casing suction port provided with the said motor, and the body side surface provided with the said inspection opening .

Also, other means may comprise a body inlet port and inside single-suction centrifugal blower box-shaped body which is provided to face the body outlet port, the single inlet centrifugal blower discharge port and spiral scroll And a casing side plate provided with a casing suction port on one side, the impeller is driven by a rotating shaft of a motor fixed in the vicinity of the casing suction port , and an inspection opening is provided on the side surface of the body facing the casing suction port . A fan with a sound deadening box,
To the body side face of the inspection opening in the same plane, comprising a box-type terminal block base of such projecting the machine body inner side, the power terminal block fixed to the inside of the terminal block base, said terminal block base A terminal block base cover is provided so as to cover and cover a space between the terminal block base and the terminal block base. It is the structure which is arrange | positioned between the said casing suction port provided with the said motor, and the body side surface provided with the said inspection opening .

In another aspect, at least one surface of the terminal block base cover is inclined with respect to the side surface of the machine body so that a distance from the casing suction port to the terminal block base cover becomes narrower toward the machine body outlet side. Is provided .

  Another means is a configuration in which the terminal block base cover is arranged to face the position of the non-pressurizing scroll space between the scroll tongue and the flat portion on the scroll opposite tongue side.

In another aspect, the height of the terminal block base cover is such that a sound absorbing material is disposed on the inner surface side of the side surface of the machine body facing the casing suction port, and the side surface of the machine body facing the casing suction port is a reference surface. are those high Kushida than the thickness of the sound absorbing material.

  Another means is a structure in which the terminal block base cover and the terminal block base are integrally formed and fixed to the machine body.

  Another means is a configuration in which a terminal block cover for watertight sealing the terminal block base cover is provided, and the power terminal block is disposed at a position facing the terminal block cover mounting surface of the terminal block base.

According to the present invention, comprising a double inlet centrifugal fan inside the box-shaped body which is provided to face the body inlet port and body outlet, the double inlet centrifugal blower, a discharge port and spiral scroll A casing side plate provided with a casing suction port is provided on both sides, and an impeller is driven by a rotating shaft of a motor fixed in the vicinity of the casing suction port , and inspection is performed on the side surface of the body facing the casing suction port provided with the motor. A blower with a sound deadening box provided with an opening,
To the body side face of the inspection opening in the same plane, comprising a box-type terminal block base of such projecting the machine body inner side, the power terminal block fixed to the inside of the terminal block base, said terminal block base A terminal block base cover is provided so as to cover and cover a space between the terminal block base and the terminal block base. The outer side of the fuselage is provided between the casing suction port provided with the motor and the side surface of the fuselage provided with the inspection opening. It is possible to provide a blower with a sound deadening box that can be suppressed and can effectively prevent dew condensation in the terminal block base.

In addition, it is possible to increase the air volume, Ru can be reduced input.

Also includes a body inlet port and inside single-suction centrifugal blower box-shaped body which is provided to face the body outlet port, the single inlet centrifugal blower, a discharge port and spiral scroll and the casing inlet A blower with a muffler box provided with a casing side plate provided on one side, driven by a rotating shaft of a motor fixed to the vicinity of the casing suction port , and provided with an inspection opening on the side of the machine body facing the casing suction port. There,
To the body side face of the inspection opening in the same plane, comprising a box-type terminal block base of such projecting the machine body inner side, the power terminal block fixed to the inside of the terminal block base, said terminal block base A terminal block base cover is provided so as to cover and cover a space between the terminal block base and the terminal block base. Side, and is arranged between the casing suction port provided with the motor and the side surface of the airframe provided with the inspection opening, so that the outer size of the airframe can be reduced and the air volume is increased. It is possible to provide a blower with a sound deadening box that can reduce input and can suppress condensation in the terminal block base.

Further, by providing at least one surface of the terminal block base cover obliquely with respect to the side surface of the machine body so that the distance from the casing suction port to the terminal block base cover becomes narrower toward the machine body outlet side. In addition, it is possible to provide a blower with a sound deadening box that can prevent an increase in pressure loss due to an airflow collision in the airflow in front of the casing side plate, increase the air volume, and reduce the input.

  Further, the terminal block base cover is arranged to face the position of the non-pressurizing scroll space between the scroll tongue and the scroll non-tongue side flat portion, thereby causing an air current collision in the front air passage on the casing side plate. It is possible to provide a blower with a sound deadening box that can prevent an increase in pressure loss, increase the air volume, and reduce the input.

Further , a sound absorbing material is arranged on the inner surface side of the airframe side surface facing the casing suction port, and the height of the terminal block base cover with the side surface of the airframe surface facing the casing suction port as a reference surface is the sound absorbing material. by high Kushida than the thickness of the can increase the air volume, it is possible to reduce the input, it is possible to provide a fan of an effect of suppressing noise.

  Moreover, providing a blower with a sound deadening box that has an effect of improving the dew condensation suppressing force in the terminal block base by integrally forming the terminal block base cover and the terminal block base and fixing the terminal block base to the fuselage. Can do.

  In addition, by providing a terminal block cover that watertightly seals the terminal block base cover and arranging the power supply terminal block at a position facing the terminal block cover mounting surface of the terminal block base, the power supply of water dripping on the top surface of the aircraft It is possible to provide a fan with a sound deadening box that can suppress adhesion to the terminal block and improve safety.

Plane | planar block diagram of the air blower with a silencer box of Embodiment 1 of this invention Side structure diagram showing the installation state of the blower with the sound deadening box Plane | planar block diagram of the air blower with a silencer box of Embodiment 2 of this invention Plane | planar block diagram of the air blower with a silencer box of Embodiment 3 of this invention Side structure diagram of fan with silencer box according to embodiment 4 of the present invention Plane | planar block diagram of the air blower with a silencer box of Embodiment 5 of this invention The perspective view of the terminal block base cover part of Embodiment 6 of this invention Plane | planar block diagram of the air blower with a silencer box of Embodiment 7 of this invention Plan view of conventional blower with silencer box Side view of the fan with the sound deadening box

Claim 1 deadening box according to the present invention comprises a double inlet centrifugal fan inside the box-shaped body which is provided to face the body inlet port and body outlet, the double inlet centrifugal blower, The casing suction port provided with the motor, which is provided with a casing side plate provided with a discharge port, a spiral scroll and a casing suction port on both side surfaces, and is driven by a rotating shaft of a motor fixed to the vicinity of the casing suction port. A blower with a muffler box provided with an inspection opening on the side of the airframe facing the airframe,
To the body side face of the inspection opening in the same plane, comprising a box-type terminal block base of such projecting the machine body inner side, the solid was constant power terminal block inside the terminal block base, said terminal block A terminal block base cover is provided so as to cover and cover the base from the inner side of the fuselage and between the terminal block base, and the terminal block base cover is located closer to the fuselage than the rotating shaft of the impeller. The air outlet side is disposed between the casing suction port provided with the motor and the airframe side surface provided with the inspection opening , and the motor closes the casing suction port. The air volume of the side plate front air passage is less than the motor side on the motor side, and the terminal block base cover protrudes from the airframe surface toward the front air passage on the casing side plate on the motor side, which is the air passage on the side with less air volume. Aircraft exterior While reducing the exposure of the power terminal block, it is possible to reduce the pressure loss inside the small aircraft airflow collision. In addition, since the terminal block base is arranged in the air passage, the temperature of the internal gas is transmitted to the terminal block base, and the terminal base cover provides an air layer between the terminal block base and the air passage. It has the effect | action that the heat transfer to the terminal block base of gas temperature can be suppressed.

Further, the air flow from the Ke pacing side plate front air duct deflects blocked the channel to the terminal block base, that the casing inlet preoral airflow toward the casing inlet port, the air flow in the rotation axis direction of the impeller And the airflow inflow load to the impeller can be reduced.

Also includes a body inlet port and inside single-suction centrifugal blower box-shaped body which is provided to face the body outlet port, the single inlet centrifugal blower, a discharge port and spiral scroll and the casing inlet A blower with a muffler box provided with a casing side plate provided on one side, driven by a rotating shaft of a motor fixed to the vicinity of the casing suction port , and provided with an inspection opening on the side of the machine body facing the casing suction port. There,
To the body side face of the inspection opening in the same plane, comprising a box-type terminal block base of such projecting the machine body inner side, the power terminal block fixed to the inside of the terminal block base, said terminal block base A terminal block base cover is provided so as to cover and cover a space between the terminal block base and the terminal block base. The terminal block base cover is disposed between the casing suction port provided with the motor and the fuselage side surface provided with the inspection opening. By projecting toward the airflow in front of the side plate, airflow from the airflow in front of the casing side plate is blocked by the terminal block base cover and deflected while reducing the exposure of the power terminal block to the outer surface of the fuselage. , Single suction type centrifugal transfer By the casing inlet preoral airflow toward the casing inlet port of the machine, can flow into the air flow in the rotation axis direction of the impeller, it is possible to reduce the air flow flowing load to the impeller. In addition, since the terminal block base is arranged in the air passage, the temperature of the internal gas is transmitted to the terminal block base, and the terminal base cover provides an air layer between the terminal block base and the air passage. It has the effect | action that the heat transfer to the terminal block base of gas temperature can be suppressed.

Further, at least one surface of the terminal block base cover is provided obliquely with respect to the side surface of the machine body so that a distance from the casing suction port to the terminal block base cover becomes narrower toward the machine body outlet side. Yes, by providing a slant rectifying surface on the terminal block base, the airflow from the casing side plate front airflow is deflected without colliding with the terminal block base, and becomes the airflow before the casing suction port toward the casing suction port. The airflow can flow in the rotation axis direction of the impeller, and the airflow inflow load to the impeller can be reduced.

Further, the terminal block base cover is arranged so as to be opposed to the position of the non-boosting scroll space between the scroll tongue and the flat part on the scroll non-tongue side, and the terminal block base is arranged in the non-boosting scroll space. By disposing it facing the position, the airflow from the front air passage in the casing side plate is divided into the boost scroll space at the terminal block base, and becomes the airflow before the casing suction port toward the casing suction port, so that the impeller The airflow can flow in the direction of the rotation axis, and the airflow inflow load to the impeller can be reduced.

Further , a sound absorbing material is arranged on the inner surface side of the airframe side surface facing the casing suction port, and the height of the terminal block base cover with the side surface of the airframe surface facing the casing suction port as a reference surface is the sound absorbing material. of are those high Kushida than the thickness, airflow from the casing side plate front air duct is deflected at the terminal block base projecting from the sound absorbing material, that the casing inlet preoral airflow toward the casing inlet, impeller The airflow can flow in the direction of the rotation axis of the airflow, and the airflow inflow load on the impeller can be reduced.

  In addition, the terminal block base cover and the terminal block base are integrally formed and fixed to the fuselage, and the airtightness of the internal air layer between the terminal block base cover and the terminal block base is increased. It has the effect | action that the heat insulation performance of a cover can be improved.

  In addition, a terminal block cover that provides water-tightness to the terminal block base cover is provided, and the power terminal block is arranged at a position facing the terminal block cover mounting surface of the terminal block base. In contrast, the terminal block cover prevents water from entering the terminal block base, and the power terminal block is located away from the terminal block cover mounting surface, thereby preventing water from adhering to the power terminal block. .

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Embodiment 1)
As shown in FIG. 1, a machine body inlet 1 and a machine outlet 2 are provided on opposite side surfaces of a box-shaped body 3. The airframe 3 is provided with a suction adapter 5 that connects the suction side duct 4 to the airframe suction port 1, and the airframe outlet 2 is provided with a blowout adapter 7 that connects the blowout side duct 6. Inside the airframe 3, there is an air passage 8 from the airframe inlet 1 to the air outlet 2, and a double suction centrifugal blower 9 is arranged in the airway 8.

  Both suction type centrifugal blowers 9 include an impeller 12 fixed to a motor 10 via a rotating shaft 11, a discharge port 13 facing the fuselage outlet 2, a spiral scroll 14, and casing side plates 15 on both side surfaces. A fan casing 16. The casing side plate 15 is provided with an orifice 18 having a casing suction port 17 opened.

  An inspection opening 19 is provided on the side of the machine body 3 facing the motor 10, and the inspection opening 19 is closed by an inspection panel 20 having substantially the same dimensions as the inspection opening 19.

  The air passage from the machine body suction port 1 to the casing suction port 17 forms a casing side plate front air passage 21 sandwiched between the inner surfaces of the machine body 3 facing the casing suction port 17, and is formed on the same body 3 as the inspection opening 19. A box-type terminal block base cover 22 is arranged, and a box-type terminal block base 24 with a power terminal block 23 fixed inside is arranged inside the terminal block base cover 22, and the terminal block base cover 22 and the terminal block base 24 are arranged. An air layer 25 is provided between them. The terminal block base cover 22 is disposed so as to protrude from the surface of the machine body 3 toward the casing 10 side plate front air passage 21 on the motor 10 side, and the casing inlet airflow 26 toward the casing inlet 17 flows in the vicinity of the terminal block base cover 22. And

  Further, the terminal block base cover 22 is arranged between the rotating shaft 11 of the impeller 12 and the airframe outlet 2.

  In addition, as shown in FIG. 2, the airframe 3 is constructed by connecting the suction side duct 4 to the airframe suction port 1 and the airflow side duct 6 to the airframe outlet 2 in the ceiling 27, and the airframe 3 is connected to the airframe on the suction side. A suction port 1, an air outlet 2 on the air outlet side, a double suction centrifugal fan 9 inside the air body 3, and a construction hanging fitting 28 on the outer surface are arranged. The airframe 3 is installed on the ceiling 27 by fixing the construction hanging bracket 28 to the suspension bolt 30 embedded in the ceiling surface 29. When the both suction type centrifugal blowers 9 are operated, the air in the room 31 passes through the suction side duct 4 and the blowout side duct 6 via the both suction type centrifugal blowers 9 and is exhausted to the outdoor 32. The ceiling back 27 and the room 31 are partitioned by a ceiling material 33, and a ceiling inspection port 34 is provided in the lower part of the body 3 of the ceiling material 33.

  With the above configuration, since the motor 10 closes the central portion of the casing suction port 17, the air volume of the casing side plate front air passage 21 is smaller on the motor side than the non-motor side, and the terminal block base cover 22 is blown from the surface of the body 3. By projecting toward the front air passage 21 on the casing side plate on the motor 10 side, which is the air passage with less air flow, the exposure of the power terminal block 23 to the outer surface of the airframe 3 is reduced, and the airflow collision is reduced and the inside of the airframe 3 is reduced. Pressure loss can be reduced.

  Also, the airflow from the casing side plate front air passage 21 is deflected by closing the flow path at the terminal block base cover 22, and becomes the airflow 26 before the casing suction port toward the casing suction port 17. The airflow can flow in the direction of the rotating shaft 11 and the airflow inflow load to the impeller 12 can be reduced.

  Further, by providing the air layer 25 between the terminal block base cover 22 and the terminal block base 24, the gas temperature of the casing inlet airflow 26 is insulated by the air layer 25, and the heat transfer of the gas temperature to the terminal block base 24 is performed. Can be suppressed.

  Thus, according to the air blower with a sound deadening box according to Embodiment 1 of the present invention, the outer dimensions of the airframe 3 can be reduced, and a decrease in the air volume can be suppressed.

  In addition, the air volume can be increased and the input can be reduced.

  Moreover, the dew condensation in the terminal block base 24 can be suppressed.

  Furthermore, since the fuselage 3 can be made small, the space of the ceiling back 27 can be lowered to ensure a large living space height in the room 31 and to increase the size of both suction centrifugal fans 9 while securing the air volume. Since there is no need, when taking out both suction type centrifugal blowers 9 at the time of maintenance, even if the ceiling inspection port 34 is small, it can work easily, and maintenance property improves.

(Embodiment 2)
As shown in FIG. 3, the airframe inlet 1 and the airframe outlet 2 are provided on opposite side surfaces of the box-shaped airframe 3. The airframe 3 is provided with a suction adapter 5 that connects the suction side duct 4 to the airframe suction port 1, and the airframe outlet 2 is provided with a blowout adapter 7 that connects the blowout side duct 6. Inside the airframe 3, there is an air passage 8 from the airframe inlet 1 to the air outlet 2, and a single suction centrifugal blower 35 is arranged in the airway 8.

  The single suction centrifugal blower 35 includes an impeller 12 fixed to a motor 10 via a rotating shaft 11, a discharge port 13 facing the fuselage outlet 2, a spiral scroll 14, and casing side plates 15 on both side surfaces. A fan casing 16. The casing side plate 15 on the motor 10 side is provided with an orifice 18 having a casing suction port 17 opened.

An inspection opening 19 is provided on the side of the machine body 3 facing the motor 10, and the inspection opening 19 is closed by an inspection panel 20 having substantially the same dimensions as the inspection opening 19.

  The air passage from the machine body suction port 1 to the casing suction port 17 forms a casing side plate front air passage 21 sandwiched between the inner surfaces of the machine body 3 facing the casing suction port 17, and is formed on the same body 3 as the inspection opening 19. A box-type terminal block base cover 22 is arranged, and a box-type terminal block base 24 with a power terminal block 23 fixed inside is arranged inside the terminal block base cover 22, and the terminal block base cover 22 and the terminal block base 24 are arranged. An air layer 25 is provided between them. The terminal block base cover 22 is disposed so as to protrude from the surface of the machine body 3 toward the casing 10 side plate front air passage 21 on the motor 10 side, and the casing inlet airflow 26 toward the casing inlet 17 flows in the vicinity of the terminal block base cover 22. The terminal block base cover 22 is arranged between the rotating shaft 11 of the impeller 12 and the fuselage outlet 2.

  The construction method for the ceiling using the construction hanging bracket 28 is the same as that in the first embodiment.

  With the above configuration, the terminal block base cover 22 protrudes from the surface of the fuselage 3 toward the casing 10 side plate front air passage 21 on the motor 10 side, thereby reducing the exposure of the power terminal block 23 to the outer surface of the fuselage 3 and reducing the casing side plate. The airflow from the front air passage 21 is blocked by the terminal block base cover 22 so that the airflow is deflected and becomes the airflow 26 before the casing suction port toward the casing suction port 17. The airflow can flow into the impeller 12, and the airflow inflow load to the impeller 12 can be reduced.

  Further, by providing the air layer 25 between the terminal block base cover 22 and the terminal block base 24, the gas temperature of the casing inlet airflow 26 is insulated by the air layer 25, and the heat transfer of the gas temperature to the terminal block base 24 is performed. Can be suppressed.

  As described above, according to the blower with a sound deadening box according to the second embodiment of the present invention, the outer size of the airframe 3 can be reduced, the air volume can be increased, and the input can be reduced.

  Moreover, the dew condensation in the terminal block base 24 can be suppressed.

(Embodiment 3)
As shown in FIG. 4, the surface of the terminal block base cover 22 that faces the machine body suction port 1 is a rectifying surface 36 that is formed obliquely toward the casing suction port 17 side.

  With the above-described configuration, the airflow from the casing side plate front air passage 21 is deflected without colliding with the terminal block base cover 22, and becomes the casing inlet front airflow 26 toward the casing inlet 17, thereby rotating the impeller 12. Airflow can flow in the direction of the axis 11, and the airflow inflow load to the impeller 12 can be reduced.

  As described above, according to the blower with a sound deadening box according to the third embodiment of the present invention, an increase in pressure loss due to an airflow collision in the casing side plate front air passage 21 can be prevented, the air volume can be increased, and the input can be reduced.

(Embodiment 4)
As shown in FIG. 5, the terminal block base cover 22 is arranged to face the position of the non-pressurizing scroll space 39 between the tongue portion 37 of the scroll 14 and the scroll non-tongue side flat portion 38 of the double suction centrifugal blower 9. The configuration is as follows.

According to the above configuration, the terminal block base cover 22 is disposed to face the position of the non-boosting scroll space 39, so that the airflow from the casing side plate front air passage 21 is not boosted scroll space in the terminal block base cover 22. As a result, the airflow can flow in the direction of the rotating shaft 11 of the impeller 12 and the airflow inflow load on the impeller 12 can be reduced. This is because the non-pressurizing scroll space 39 between the end portion of the logarithmic spiral expansion of the scroll 14 and the tongue portion 37 is a region where the air blowing efficiency of the centrifugal blower is generally considered to be low. By disposing the terminal block base cover 22 which is a thing, the fall of the ventilation efficiency by an air current collision is prevented.

  As described above, according to the blower with a sound deadening box according to the fourth embodiment of the present invention, an increase in pressure loss due to an airflow collision in the casing side plate front air passage 21 can be prevented, the air volume can be increased, and the input can be reduced.

  In addition, even if it is the structure which uses a single suction type centrifugal blower instead of the both suction type centrifugal blowers 9 according to a required air volume, it does not produce a difference in the effect.

(Embodiment 5)
As shown in FIG. 6, the sound absorbing material 40 is disposed on the inner surface of the machine body 3, and the terminal block base cover protruding height 42 toward the casing side plate front air passage 21 of the terminal block base cover 22 is set to the terminal block base cover side sound absorbing material thickness. It is set to be higher than 43.

  With the above configuration, the airflow from the front air passage 21 on the casing side plate is deflected by the terminal block base cover 22 protruding from the sound absorbing material 40 and becomes the airflow 26 before the casing suction port toward the casing suction port 17. The airflow can flow in the direction of the twelve rotating shafts 11, and the airflow inflow load to the impeller 12 can be reduced.

  As described above, according to the blower with a sound deadening box according to the fifth embodiment of the present invention, the sound absorbing material 40 is arranged on the inner surface of the body 3 and the terminal block base cover protrudes toward the front air passage 21 of the casing side plate of the terminal block base cover 22. By adopting a configuration in which the height 42 is made higher than the terminal block base cover side sound absorbing material thickness 43, the air volume can be increased, the input can be reduced, and noise can be suppressed.

(Embodiment 6)
As shown in FIG. 7, the terminal block base cover 22 and the terminal block base 24 are integrated and fixed to the machine body 3.

  With the above configuration, the airtightness of the air layer 25 inside the terminal block base cover 22 and the terminal block base 24 can be increased, and the heat insulating performance of the terminal block base cover can be improved.

  As described above, according to the blower with a sound deadening box according to the sixth embodiment of the present invention, the terminal block base cover 22 and the terminal block base 24 are integrally formed and fixed to the machine body 3. The occurrence of dew condensation in 24 will be suppressed.

(Embodiment 7)
As shown in FIG. 8, the terminal block base cover 22 is fixed to the machine body 3 independently of the inspection panel 20.

  Further, a terminal block cover 44 for watertightly sealing the terminal block base cover 22 is provided, and the power supply terminal block 23 is arranged at a position facing the terminal block cover 44 mounting surface of the terminal block base 24.

  The construction hanging bracket 28 is fixed to the outer surface of the body 3 other than the surface on which the terminal block base cover 22 is arranged.

  With the above configuration, the terminal block base cover 22 is fixed to the machine body 3 independently of the inspection panel 20, and the terminal block base cover 22 is fixed to the machine body 3 with the inspection panel 20 removed. Since power can be applied to the power supply terminal block 23 inside the terminal block base 24, the test operation state of the motor 10 and the impeller 12 can be confirmed from the inspection opening 19 only by performing the attaching / detaching operation of the inspection panel 20.

  Further, a terminal block cover 44 for water-tightening the terminal block base cover 22 is provided, and the power supply terminal block 23 is arranged at a position facing the terminal block cover 44 mounting surface of the terminal block base 24 inside the terminal block base cover 22. The terminal block cover 44 prevents water from entering the terminal block base 24 against water dripping on the top surface of the machine body 3, and the power terminal block 23 is located away from the mounting surface of the terminal block cover 44. Thus, it is possible to prevent water from adhering to the power terminal block 23.

  In addition, the construction hanging bracket 28 is fixed to the outer surface of the body 3 other than the surface on which the terminal block base cover 22 is disposed, and the construction suspension bracket 28 is mounted on the body other than the surface on which the terminal block base cover 22 is disposed. 3 When the scroll 14 is small and the distance between the rotating shaft 11 and the airframe outlet 2 is small by fixing to the outer surface, the vicinity of the airframe outlet 2 without interfering with the terminal base cover 22 to the suspension bracket 28 for construction. Can be arranged.

  As described above, according to the blower with a sound deadening box according to the seventh embodiment of the present invention, the terminal block base cover 22 is fixed to the airframe 3 independently of the inspection panel 20, thereby improving workability during maintenance. It will be possible.

  Further, a terminal block cover 44 for water-tightening the terminal block base cover 22 is provided, and the power supply terminal block 23 is arranged at a position facing the terminal block cover 44 mounting surface of the terminal block base 24 inside the terminal block base cover 22. As a result, the adhesion of water dripping onto the top surface of the body 3 to the power terminal block 23 can be suppressed, and the safety can be improved.

  Further, the construction hanging bracket 28 is fixed to the outer surface of the machine body 3 other than the surface on which the terminal block base cover 22 is arranged, so that the outer dimension of the machine body 3 can be reduced according to the size of the scroll 14. It becomes.

  In addition to the purpose of air conveyance such as ventilation blower, air conditioner, dehumidifier, humidifier, air purifier, etc., the equipment can be cooled by using the air blown from the air outlet, the outside size of the airframe can be reduced, and the air volume is reduced. Since the cooling effect is high, it can be applied to the use of air blowing for equipment that can be installed compactly.

DESCRIPTION OF SYMBOLS 1 Airframe inlet 2 Airframe outlet 3 Airframe 8 Air path 9 Both suction type centrifugal blower 10 Motor 11 Rotating shaft 12 Impeller 13 Discharge port 14 Scroll 15 Casing side plate 17 Casing inlet 19 Inspection opening 20 Inspection panel 21 Casing side plate front Air path 22 Terminal block base cover 23 Power supply terminal block 24 Terminal block base 25 Air layer 26 Airflow in front of casing suction port 28 Suspension metal fitting 35 Single suction centrifugal fan 36 Rectifying surface 37 Tongue 38 Flat part on the side opposite to the tongue 39 Non-boosting scroll space 40 Sound absorbing material 42 Terminal block base cover protrusion height 43 Terminal block base cover side sound absorbing material thickness 44 Terminal block cover

Claims (7)

A double-suction centrifugal blower is provided inside a box-shaped airframe provided with a fuselage suction port and a fuselage outlet facing each other, and this dual-suction centrifugal blower has a discharge port, a spiral scroll, and a casing suction port. Casing side plates are provided on both sides,
Driven by the rotating shaft of the motor which fixed the impeller near the casing suction port,
A blower with a muffler box provided with an inspection opening on the side of the machine body facing the casing suction port provided with the motor,
To the body side face of the inspection opening in the same plane, with the terminal block base box-so as to protrude into the body inner side,
Fix the power terminal block inside this terminal block base,
A terminal block base cover is provided so as to cover and form a space between the terminal block base from the inside of the machine body and the terminal block base,
The terminal block base cover is disposed on the fuselage outlet side with respect to the rotating shaft of the impeller and between the casing suction port provided with the motor and the fuselage side surface provided with the inspection opening. Blower with silencer box. A single-suction centrifugal blower is provided inside a box-shaped airframe that is provided with the airframe inlet and the air outlet facing each other.
The single inlet centrifugal blower comprises a casing side plate provided with the discharge port and spiral scroll and the casing inlet on one side,
Driven by the rotating shaft of the motor which fixed the impeller near the casing suction port,
A blower with a muffler box provided with an inspection opening on the side of the machine body facing the casing suction port ,
To the body side face of the inspection opening in the same plane, with the terminal block base box-so as to protrude into the body inner side,
Fix the power terminal block inside this terminal block base,
A terminal block base cover is provided so as to cover and form a space between the terminal block base from the inside of the machine body and the terminal block base,
The terminal block base cover is disposed on the airframe outlet side of the rotating shaft of the impeller and between the casing suction port provided with the motor and the side surface of the airframe provided with the inspection opening.
Fan with the sound deadening box to be. As the distance from the casing inlet port to said terminal block base cover is narrowed toward the body outlet port side, the claim is provided obliquely at least one surface with respect to the machine body side surface of the terminal block base cover 1 or 2. A blower with a sound deadening box. The terminal block base cover from the tongue of the scroll of claims 1 to 3, characterized in that a structure in which arranged opposite to the position of non-boost scroll space between Hanshita side flat portion of the scroll A blower with a sound deadening box according to any one of the above. Disposing a sound absorbing material on the inner surface side of the side surface of the airframe facing the casing suction port ,
The height of the terminal block base cover the body side facing the casing inlet port to the reference plane, sound deadening box machine according to any higher-Kushida of claims 1 to 4 the thickness of the sound absorbing material. The terminal block base cover and formed by integrating the terminal block base, deadening box according to any one of claims 1 5, characterized in that a structure to be fixed to the machine body. The terminal cover to watertight the terminal block base cover provided,
The blower with a muffler box according to any one of claims 1 to 6 , wherein a power terminal block is arranged at a position facing the terminal block cover mounting surface of the terminal block base.

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