JP7029595B2 - Blower - Google Patents

Description

The present invention relates to a blower with a filter that ventilates the interior of a building.

In the conventional blower with a filter, a filter is installed in the suction opening of the housing containing the blower, and air is sucked into the housing through the filter installed in the suction opening to collect and purify dust in the air. It is known that the air is conveyed (see, for example, Patent Document 1).

Hereinafter, the blower with a filter described in Patent Document 1 will be described with reference to FIG.

As shown in FIG. 6, in the conventional blower 101 with a filter, the blower 103 is built in the housing 102. The housing 102 is provided with a suction opening 104 and a blowout opening 105, and the suction opening 104 is provided with a filter unit 106.

When the blower 103 is operated, the air in the room 107 flows into the housing 102 through the suction opening 104 and is discharged from the blowout opening 105 through the blower 103. At this time, the air flow 108 flowing into the housing 102 passes through the filter unit 106 to purify the air.

Special Table 2005-518517

In such a conventional blower with a filter, when a fine filter is installed, the effect of collecting dust in the air is high, but the filter is clogged quickly, the pressure loss is large, and the performance of the blower is deteriorated. .. As a result, there is a problem that the number of times of maintenance (cleaning / regeneration) of the filter required to maintain the performance increases. On the other hand, when a coarse filter is installed, the performance deterioration of the blower due to the clogging of the filter can be suppressed, but there is a problem that the dust collecting effect is lowered.

Therefore, the present invention solves the above-mentioned conventional problems, and an object of the present invention is to provide a blower that can be used for a long period of time by suppressing the maintenance frequency even when a fine filter having a high dust collecting effect is installed. And.

In order to achieve the above object, the blower according to the present invention has a housing provided with a suction opening for sucking air and a blowout opening for blowing out air sucked through the suction opening, and the suction opening through the suction opening. A blower unit that guides air to the outlet, a filter unit that is provided at the suction opening and purifies the air sucked into the housing at a purification position, a filter dust remover that removes dust from the filter unit, and the air blower. The detection unit that detects the related physical quantity that changes with the air volume of the air sucked into the housing by the unit, the calculation unit that calculates the change in the related physical quantity, and the calculation unit based on the change in the related physical quantity calculated by the calculation unit. A control unit for operating a filter dust removing unit is provided, the air blowing unit is provided with an electric motor, the detecting unit detects a current value supplied to the electric motor as the related physical quantity, and the filter dust removing unit is described. An urging unit that urges the filter unit to the downstream side of the purification position, a movable portion that moves the filter unit to the downstream side based on the urging by the urging unit, and an urging unit by the urging unit. The anti-vibration unit is provided with a counter-vibration unit that urges the filter unit to the upstream side and a deterrent unit that suppresses the movement of the filter unit in the upstream direction from the purification position. A blower or the like that moves the filter unit in the upstream direction by a reaction to the release of the urgency by the urging unit to cause the filter unit to collide with the restraining unit, thereby achieving the intended purpose. Is.

According to the present invention, it is possible to provide a blower that can be used for a long period of time by suppressing the maintenance frequency even when a fine filter having a high dust collecting effect is installed.

Schematic perspective view of the blower according to the present invention Side sectional view showing a state in which the urging portion urges the filter portion. Side sectional view showing a state in which the urging portion does not urge the filter portion. Side sectional view of the blower, which is a differential pressure gauge in which the detection unit detects the static pressure of the blower unit. Side cross-sectional view of a blower, which is an anemometer whose detection unit detects the wind speed of air passing through the outlet duct. Side sectional view of a conventional blower with a filter

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings for the understanding of this description. The following embodiments are examples that embody the present invention, and do not limit the technical scope of the present invention. In addition, the same parts are designated by the same reference numerals throughout the drawings, and the second and subsequent explanations are omitted.

(Embodiment 1)
First, a schematic configuration of the blower according to the present invention will be described with reference to FIGS. 1, 2, and 3. 1 is a schematic perspective view of the blower according to the present invention, FIG. 2 is a side sectional view showing a state in which the urging portion urges the filter portion, and FIG. 3 shows the urging portion not urging the filter portion. It is a side sectional view showing a state.

As shown in FIGS. 2 and 3, the blower 50 includes a housing 1, a blower unit 4, a filter unit 5, a filter dust removal unit 6, a detection unit 7, a calculation unit 8, and a control unit 9. I have.

As shown in FIG. 1, the housing 1 is a hexahedron having a substantially rectangular shape, and includes a suction opening 2 and a blowout opening 3.

The suction opening 2 is provided as a rectangular opening on one surface of the housing 1, and a filter portion 5 is provided.

The blowout opening 3 is provided as an opening on one surface different from the suction opening 2 of the housing 1.

The blower portion 4 includes a centrifugal fan 11 that sucks air into the housing 1 through the suction opening 2 and blows out the air sucked into the housing 1 from the blowout opening 3, that is, the blowout opening from the suction opening 2. Guide the air to 3.

The centrifugal fan 11 includes an impeller 12 and an electric motor A13.

The impeller 12 and the electric motor A13 are connected by a pulley 14 and a belt 15, and when the electric motor A13 is supplied with power and rotates, the impeller 12 rotates via the pulley 14 and the belt 15. Although the centrifugal fan is used in this embodiment, an axial fan or a plug fan may be used. Further, although the impeller 12 and the electric motor A13 are connected by the pulley 14 and the belt 15, a direct drive may be used.

The filter unit 5 collects the object to be purified contained in the air sucked from the suction opening 2 by the blower unit 4 at the purification position 10, that is, purifies the air. Here, the purification position 10 is a position where the filter unit 5 purifies air, and a position where the filter unit 5 covers the suction opening 2.

The filter dust removing unit 6 includes an urging unit 16, a movable unit 17, a counter urging unit 18, and a deterrent unit 19.

The urging unit 16 urges the lower end of the filter unit 5 to the downstream side of the purification position 10. In the urging unit 16, the urging unit 16 itself urges the filter unit 5 by power. For example, the urging portion 16 includes an electric motor B20 having a rotating shaft A31 and a cam 21 provided on the rotating shaft A31.

The electric motor B20 rotates the rotating shaft A31 by feeding power.

The cam 21 has a circular shape centered on the rotation axis A31 and has a protrusion portion 22 in an arbitrary direction. In the cam 21, the protrusion 22 urges the filter portion 5 to the downstream side by rotation, and the movable portion 17 is used as the rotation axis B32 to tilt the filter portion 5.

The movable portion 17 moves the filter portion 5 from the purification position 10 to the downstream side based on the bias in the action 41 direction by the urging portion 16. The movable portion 17 is provided as a rotation shaft B32 that aligns one side of the purification position 10 with one side of the filter portion 5 and pivotally supports the filter portion 5 in the rotation direction. Due to the urging by the urging portion 16, the movable portion 17 tilts, for example, the side facing the rotating shaft B32 of the filter portion 5 to the downstream side with one side as the rotating shaft B32.

The counter-urging unit 18 urges the filter unit 5 to the upstream side with respect to the urging by the urging unit 16. As shown in FIGS. 2 and 3, the recoil portion 18 is provided as an elastic body such as a spring 23, and is a spring against the movement (action 41) of the filter portion 5 to the downstream side by the movable portion 17. The reaction 42 of 23 urges the filter unit 5 to attract the filter unit 5 to the purification position 10. The counter-urging portion 18 moves the filter portion 5 to the upstream side with the movable portion 17 as the rotation axis B32 because the counter-urging portion 18 becomes stronger due to the release of the urging of the urging portion 16.

The restraining unit 19 suppresses the movement of the filter unit 5 to the upstream side of the purification position 10. The restraining portion 19 is provided around the suction opening 2 at the purification position 10 as a rib or a protrusion protruding toward the inner peripheral side of the suction opening 2. The restraint unit 19 filters by contacting the filter unit 5 at the purification position 10, that is, the filter unit 5 collides with the restraint unit 19 in response to the movement of the filter unit 5 to the upstream side by the repulsion unit 18. Stop the movement of the part 5 to the upstream side.

The detection unit 7 detects a related physical quantity that changes with the air volume of the air sucked into the housing 1 by the blower unit 4. The detection unit 7 is, for example, an ammeter that detects the current value supplied to the electric motor A13. The current supplied from the external power source passes through the internal wiring 24 and is supplied to the electric motor A13 via the detection unit 7. That is, the related physical quantity in the present embodiment is a current value, and the detection unit 7 detects the current value supplied to the electric motor A13, which changes with the change of the air volume.

The calculation unit 8 calculates the change in the current value detected by the detection unit 7.

The control unit 9 operates the urging unit 16 of the filter dust removing unit 6 based on the change in the current value calculated by the calculating unit 8, and urges and releases the urging to the filter unit 5.

The above is the schematic configuration of the blower 50.

Subsequently, the automatic dust removal operation of the filter in the blower 50 will be described.

Normally, in a blower, when the pressure loss becomes large due to the clogging of the filter, the air volume of the air carried by the blower portion 4 decreases and the load applied to the motor A13 becomes smaller, so that the current value supplied to the motor A13 decreases. ..

In the present embodiment, the detection unit 7 detects the current value supplied to the electric motor A13 as a related physical quantity, and the calculation unit 8 calculates the change. Then, when the current value falls below the set value, it is considered that the air volume has decreased, and the control unit 9 transmits a signal to the urging unit 16 to operate the urging unit 16 and at the same time, the air blowing unit 4 Stop the operation of. When the urging unit 16 operates, the electric motor B20 is supplied with power to rotate, and the cam 21 is rotated. When the cam 21 rotates, the filter portion 5 is urged by the action 41 of the protrusion portion 22, and the filter portion 5 rotates downstream with the movable portion 17 as the rotation axis B32.

Next, the urging portion 16 is released from the urging portion 16 by passing the protruding portion 22 of the cam 21 through the filter portion 5. When the urging by the urging unit 16 is released, only the reaction 42 of the reaction urging unit 18 acts on the filter unit 5, so that the filter unit 5 moves to the upstream side via the movable unit 17 and the filter unit 5 collides with the restraining unit 19 at the purification position. Here, the blowing direction is from the upstream side to the downstream side, and the collected purification object, for example, dust is collected on the upstream side surface of the filter unit 5. Therefore, by colliding the filter unit 5 with the restraining unit 19 from the downstream side, the dust collected by the filter unit 5 can be knocked down to the upstream side to remove the dust from the filter unit 5. After the dust removal operation is completed, a signal is sent from the control unit 9 to the urging unit 16 to stop the operation of the urging unit 16 and at the same time restart the operation of the blower unit 4.

As described above, the filter unit 5 is moved based on the change in the current value supplied to the electric motor A13 and collides with the suppression unit 19, so that the impact force toward the upstream side is transmitted to the dust and collected. The dust in the filter unit 5 is removed. Therefore, it is possible to reduce the increase in pressure loss due to the clogging of the filter in long-term use, and to suppress or eliminate the maintenance frequency even in long-term use.

In the present embodiment, the related physical quantity detected by the detection unit 7 is the current value supplied to the motor A13, but it may be the power value input to the motor A13.

(Embodiment 2)
A blower according to a second embodiment of the present invention will be described with reference to FIG.

In this embodiment, only the differences from the first embodiment will be described.

The blower 51 shown in FIG. 4 is a differential pressure gauge in which the detection unit 7 detects the difference between the pressure in the housing 1 generated by the suction of air into the housing 1 by the blower unit 4 and the atmospheric pressure. That is, the related physical quantity in this embodiment is pressure. The detection unit 7 has a pressure guiding tube A25 and a pressure guiding tube B26, and the pressure guiding tube A25 has a structure for measuring the pressure inside the housing 1, and the pressure guiding tube B26 has a structure for measuring the atmospheric pressure.

When the pressure loss becomes large due to the clogging of the filter unit 5, the air volume of the air carried by the air blower unit 4 decreases, and the pressure in the housing 1 generated by the suction into the housing 1 by the air blower unit 4 increases. The detection unit 7 detects the difference between the pressure in the housing 1 and the atmospheric pressure, that is, the static pressure of the blower unit 4, and the calculation unit 8 calculates the change. Then, when the static pressure of the blower unit 4 exceeds the set value, it is considered that the air volume has decreased, and a signal is sent from the control unit 9 to the urging unit 16 to operate the urging unit 16. Since the subsequent movements are the same as those in the first embodiment, they will be omitted.

(Embodiment 3)
The blower of the third embodiment of the present invention will be described with reference to FIG.

In this embodiment, only the differences from the first embodiment will be described.

The blower 52 shown in FIG. 5 is provided with a blowout duct 27 in the blowout opening 3, and the detection unit 7 is an anemometer having a wind speed sensor 28, and detects the wind speed of the air passing through the blowout duct 27. That is, the related physical quantity in this embodiment is the wind speed.

When the pressure loss becomes large due to the clogging of the filter portion 5, the air volume of the air carried by the blower portion 4 decreases. That is, the air volume of the air passing through the outlet duct 27 decreases, and the wind speed of the air passing through the outlet duct 27 decreases. The wind speed sensor 28 of the detection unit 7 detects the wind speed of the air passing through the blowout duct 27, and the calculation unit 8 calculates the amount of air passing through the blowout duct 27 from the wind speed and the cross-sectional area of the blowout duct 27. Then, when the air volume passing through the blowout duct 27 falls below the set value, a signal is sent from the control unit 9 to the urging unit 16 to operate the urging unit 16. Since the subsequent movements are the same as those in the first embodiment, they will be omitted.

The blower according to the present invention can remove dust such as fine sand and dust, and is useful as a blower that suppresses maintenance frequency in long-term use.

1 Housing 2 Suction opening 3 Blow-out opening 4 Blower 5 Filter 6 Filter dust remover 7 Detection 8 Calculation 9 Control 10 Purification position 11 Centrifugal fan 12 Impeller 13 Motor A
14 Pulley 15 Belt 16 Biasing part 17 Movable part 18 Anti-urging part 19 Deterrence part 20 Motor B
21 Cam 22 Protruding part 23 Spring 24 Internal wiring 25 Pressure guiding tube A
26 Pressure guiding tube B
27 Blow-out duct 28 Wind speed sensor 31 Rotating shaft A
32 Rotating shaft B
41 Action 42 Reaction 50,51,52 Blower

Claims (4)

A housing provided with a suction opening for sucking air and a blowout opening for blowing out the air sucked through the suction opening.
A blower that guides air from the suction opening to the blowout opening,
A filter unit provided in the suction opening to purify the air sucked into the housing at a purification position,
A filter dust removing unit that removes dust from the filter unit,
A detection unit that detects a related physical quantity that changes with the air volume of air sucked into the housing by the ventilation unit.
A calculation unit that calculates changes in the related physical quantities,
A control unit that operates the filter dust removal unit based on a change in a related physical quantity calculated by the calculation unit is provided.
The blower is provided with a motor and
The detector is
The current value supplied to the motor is detected as the related physical quantity, and the current value is detected.
The filter dust remover is
An urging unit that urges the filter unit to the downstream side of the purification position,
A movable part that moves the filter part to the downstream side based on the urging by the urging part, and
A counter-urging unit that urges the filter unit to the upstream side against the urging by the urging unit,
A deterrent unit for suppressing the movement of the filter unit in the upstream direction from the purification position is provided.
The repulsive part is
A blower that moves the filter unit in the upstream direction by a reaction to the release of the urgency by the urging unit and causes the filter unit to collide with the restraining unit. A housing provided with a suction opening for sucking air and a blowout opening for blowing out the air sucked through the suction opening.
A blower that guides air from the suction opening to the blowout opening,
A filter unit provided in the suction opening to purify the air sucked into the housing at a purification position,
A filter dust removing unit that removes dust from the filter unit,
A detection unit that detects a related physical quantity that changes with the air volume of air sucked into the housing by the ventilation unit.
A calculation unit that calculates changes in the related physical quantities,
A control unit that operates the filter dust removal unit based on a change in a related physical quantity calculated by the calculation unit is provided.
The blower portion is equipped with a motor and has an electric motor.
The detector is
The electric power value input to the motor is detected as the related physical quantity, and the electric power value is detected.
The filter dust remover is
An urging unit that urges the filter unit to the downstream side of the purification position,
A movable part that moves the filter part to the downstream side based on the urging by the urging part, and
A counter-urging unit that urges the filter unit to the upstream side against the urging by the urging unit,
A deterrent unit for suppressing the movement of the filter unit in the upstream direction from the purification position is provided.
The repulsive part is
A blower that moves the filter unit in the upstream direction by a reaction to the release of the urgency by the urging unit and causes the filter unit to collide with the restraining unit. A housing provided with a suction opening for sucking air and a blowout opening for blowing out the air sucked through the suction opening.
A blower that guides air from the suction opening to the blowout opening,
A filter unit provided in the suction opening to purify the air sucked into the housing at a purification position,
A filter dust removing unit that removes dust from the filter unit,
A detection unit that detects a related physical quantity that changes with the air volume of air sucked into the housing by the ventilation unit.
A calculation unit that calculates changes in the related physical quantities,
A control unit that operates the filter dust removal unit based on a change in a related physical quantity calculated by the calculation unit is provided.
The detector is
As the related physical quantity, the difference between the pressure inside the housing and the atmospheric pressure caused by the suction into the housing by the blower is detected.
The filter dust remover is
An urging unit that urges the filter unit to the downstream side of the purification position,
A movable part that moves the filter part to the downstream side based on the urging by the urging part, and
A counter-urging unit that urges the filter unit to the upstream side against the urging by the urging unit,
A deterrent unit for suppressing the movement of the filter unit in the upstream direction from the purification position is provided.
The repulsive part is
A blower that moves the filter unit in the upstream direction by a reaction to the release of the urgency by the urging unit and causes the filter unit to collide with the restraining unit. A housing provided with a suction opening for sucking air and a blowout opening for blowing out the air sucked through the suction opening.
A blower that guides air from the suction opening to the blowout opening,
A filter unit provided in the suction opening to purify the air sucked into the housing at a purification position,
A filter dust removing unit that removes dust from the filter unit,
A detection unit that detects a related physical quantity that changes with the air volume of air sucked into the housing by the ventilation unit.
A calculation unit that calculates changes in the related physical quantities,
A control unit that operates the filter dust removal unit based on a change in a related physical quantity calculated by the calculation unit is provided.
The outlet is provided with an outlet duct.
The detector is
As the related physical quantity, the wind speed of the air passing through the outlet duct is detected.
The filter dust remover is
An urging unit that urges the filter unit to the downstream side of the purification position,
A movable part that moves the filter part to the downstream side based on the urging by the urging part, and
A counter-urging unit that urges the filter unit to the upstream side against the urging by the urging unit,
A deterrent unit for suppressing the movement of the filter unit in the upstream direction from the purification position is provided.
The repulsive part is
A blower that moves the filter unit in the upstream direction by a reaction to the release of the urgency by the urging unit and causes the filter unit to collide with the restraining unit.

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