WO2019065198A1

WO2019065198A1 - Blower

Info

Publication number: WO2019065198A1
Application number: PCT/JP2018/033528
Authority: WO
Inventors: 美咲佐岡; 由美子北川; 朗正上原; 井上　大輔
Original assignee: パナソニックＩｐマネジメント株式会社
Priority date: 2017-09-29
Filing date: 2018-09-11
Publication date: 2019-04-04

Abstract

This blower (50) is provided with a case (1), a blowing unit (4), a filter unit (5), a filter dust-removing unit (6), a detection unit (7), a calculation unit (8), and a control unit (9). The case (1) is provided with: an intake opening (2) for suctioning air; and a blow-out opening (3) for blowing out air suctioned through the intake opening (2). The blower unit (4) guides air from the intake opening (2) to the blow-out opening (3). The filter unit (5) is provided in the intake opening (2) and purifies the air, suctioned into the case (1), from a purification position. The filter dust-removing unit (6) removes dust from the filter unit (5). The detection unit (7) detects related physical quantities that change along with the volume of air suctioned into the case (1) by the blowing unit (4). The calculation unit (8) calculates changes in the related physical quantities. The control unit (9) operates the filter dust-removing unit (6) on the basis of the changes in the related physical quantities calculated by the calculation unit (8).

Description

Blower

The present invention relates to a filter-equipped blower for ventilating a room of a building.

Conventionally, a filter is installed at the suction opening of a housing incorporating a blower, and air is collected into the housing through the filter installed at the suction opening, and dust and the like in the air are collected and transported. A fan with a filter is known (see, for example, Patent Document 1).

Hereinafter, the filter-equipped fan described in Patent Document 1 will be described with reference to FIG.

As shown in FIG. 11, in the conventional filter-equipped fan 201, a fan 203 is incorporated in a housing 202. The housing 202 is provided with a suction opening 204 and a blowout opening 205, and the suction opening 204 is provided with a filter unit 206.

When the blower 203 is operated, the air in the room 207 flows into the housing 202 from the suction opening 204 and is discharged from the blowout opening 205 via the blower 203. At this time, the air flow 208 flowing into the housing 202 passes through the filter unit 206 to purify the air.

Further, as shown in FIG. 12, in the box-type belt-driven centrifugal blower described in Patent Document 2, a casing 303 and a motor attachment 302 in which a motor 301 is disposed are fixed on a casing attachment 304. By sliding the motor attachment 302 in the horizontal direction, tension adjustment of the belt 307 between the shaft 305 of the blower in the casing 303 and the rotation shaft 306 of the motor 301 is performed.

Japanese Patent Application Publication No. 2005-518517 Japanese Utility Model Publication No. 61-283800

In such a conventional filter-equipped fan, when a fine-grained filter is installed, the dust collection effect in the air is enhanced, but the filter is quickly clogged, the pressure loss is increased, and the performance of the fan is degraded. . As a result, there is a problem that the number of times of maintenance (cleaning / regeneration) of the filter necessary to maintain the performance is increased. On the other hand, when the coarse filter is installed, although the performance degradation of the fan due to the clogging of the filter can be suppressed, it has a problem that the dust collection effect is lowered.

One object of the present invention is to provide a blower that can be used for a long time while suppressing maintenance frequency even when a fine filter with high dust collection effect is installed.

Moreover, in the air blower of patent document 2, since the casing 303 and the motor attachment 302 which attached the motor 301 were arranged side by side on the casing attachment 304, the wide installation area was required.

Another object of the present invention is to provide a blower having a reduced installation area and improved workability and maintainability.

A blower according to one aspect of the present invention includes a housing, a blower, a filter, a filter dust remover, a detector, a calculator, and a controller. The housing is provided with a suction opening for sucking in air and a blow-off opening for blowing out the air sucked through the suction opening. The blower unit guides the air from the suction opening to the blowout opening. The filter portion is provided at the suction opening and purifies the air sucked into the housing at the purification position. The filter dust removal unit removes dust from the filter unit. The detection unit detects an associated physical quantity that changes with an air volume of air drawn into the housing by the blower. The calculation unit calculates a change in the related physical quantity. The control unit operates the filter dust removal unit based on the change in the related physical quantity calculated by the calculation unit.

ADVANTAGE OF THE INVENTION According to this invention, even when the fine filter with a high dust collection effect is installed, a maintenance frequency can be suppressed and the fan which can be used for a long time can be provided.

FIG. 1 is a schematic perspective view of a blower according to Embodiment 1 of the present invention. FIG. 2 is a side sectional view showing a state in which the biasing unit biases the filter unit. FIG. 3 is a side sectional view showing a state in which the biasing unit does not bias the filter unit. FIG. 4 is a side sectional view of the blower according to the second embodiment. FIG. 5 is a side cross-sectional view of the blower according to the third embodiment. FIG. 6 is a schematic cross-sectional view in a side view of a blower according to Embodiment 5 of the present invention. FIG. 7 is a schematic cross-sectional view in a rear view of the blower. FIG. 8 is a perspective view of the blower with the top panel of the housing removed. FIG. 9 is a perspective view of a motor attachment. FIG. 10 is a schematic view showing the distance between the first rotation axis and the second rotation axis. FIG. 11 is a side sectional view of a conventional filter-equipped fan. FIG. 12 is a cross-sectional view showing a conventional box-type belt-driven centrifugal fan.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings for understanding of the present description. The following embodiment is an example embodying the present invention, and does not limit the technical scope of the present invention. Moreover, the same code | symbol is attached | subjected about an identical site | part through all the drawings, and the description after the second time is abbreviate | omitted.

Embodiment 1
First, the 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 first embodiment of the present invention, FIG. 2 is a side sectional view showing a state in which the biasing unit biases the filter unit, and FIG. 3 is a filter unit. It is a sectional side view which shows the state which is not urging | biasing.

As shown in FIGS. 2 and 3, the blower 50 includes the housing 1, the blower 4, the filter 5, the filter dust collector 6, the detector 7, the calculator 8, and the controller 9. Have.

The housing 1 is a substantially rectangular hexahedron as shown in FIG. The housing 1 is provided with a suction opening 2 and a blowout opening 3.

The suction opening 2 is provided on one surface of the housing 1 as a rectangular opening.

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

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

The centrifugal fan 11 includes an impeller 12 and an electric motor 13.

The impeller 12 and the motor 13 are connected by a pulley 14 and a belt 15. When the motor 13 is supplied with power and rotates, the impeller 12 is rotated via the pulley 14 and the belt 15. In addition, although the ventilation part 4 is provided with the centrifugal fan in this Embodiment, you may provide an axial-flow fan and a plug fan. Further, although the impeller 12 and the motor 13 are connected by the pulley 14 and the belt 15, they may be driven in direct connection.

The filter unit 5 collects at the purification position 10 the purification target contained in the air sucked from the suction opening 2 by the blower unit 4. That is, the filter unit 5 purifies the air. Here, the purification position 10 is a position where the filter unit 5 purifies air, and is a position where the suction opening 2 is covered by the filter unit 5.

The filter dust removing unit 6 includes a biasing unit 16, a movable unit 17, a counter biasing unit 18, and a restraining unit 19. The filter dust removal unit 6 removes dust from the filter unit 5.

The biasing unit 16 biases the lower end of the filter unit 5 to the downstream side of the cleaning position 10. In the biasing unit 16, the biasing unit 16 itself biases the filter unit 5 by power. For example, the biasing unit 16 includes an electric motor 20 having a rotating shaft 31 and a cam 21 provided on the rotating shaft 31. Here, the downstream side is a direction in which the air sucked from the suction opening 2 flows.

The electric motor 20 rotates the rotating shaft 31 by power feeding.

The cam 21 has a circular shape centered on the rotation shaft 31 and has a projection 22 in any direction. The cam 21 urges the filter unit 5 downstream with the projection 22 by rotation, and tilts the filter unit 5 with the movable unit 17 as the rotation shaft 32.

The movable portion 17 moves the filter portion 5 from the purification position 10 to the downstream side based on the biasing in the direction of the action 41 by the biasing portion 16. The movable portion 17 is provided as a rotation shaft 32 for axially supporting the filter portion 5 in the rotational direction with one side 10 a of the purification position 10 and one side 5 a of the filter portion 5 being aligned. The movable portion 17 is biased by the biasing portion 16 to tilt, for example, the side facing the rotation shaft 32 of the filter unit 5 with the one side as the rotation shaft 32 toward the downstream side.

The counter biasing unit 18 biases the filter unit 5 upstream with respect to biasing by the biasing unit 16. The anti-biasing portion 18 is provided as an elastic body such as a spring 23, as shown in FIGS. The counter biasing unit 18 causes the filter unit 5 to draw the filter unit 5 to the purification position 10 by the reaction 42 of the spring 23 against the downstream movement (action 41) of the filter unit 5 by the movable unit 17. Energize. The anti-biasing unit 18 moves the filter unit 5 to the upstream side by using the movable unit 17 as the rotation shaft 32 because the biasing of the anti-biasing unit 18 becomes stronger by releasing the biasing of the biasing unit 16.

The suppression unit 19 suppresses movement of the filter unit 5 upstream of the purification position 10. The suppressing portion 19 is provided around the suction opening 2 at the purification position 10 as a rib or a protrusion that protrudes to the inner peripheral side of the suction opening 2. The restraining portion 19 contacts the filter portion 5 at the purification position 10 with respect to the movement of the filter portion 5 to the upstream side by the counter biasing portion 18, that is, the filter portion 5 collides with the restraining portion 19. Stop moving the part 5 to the upstream side.

The detection unit 7 detects an associated physical quantity that changes with the air volume of the air drawn into the housing 1 by the blower unit 4. The detection unit 7 is, for example, an ammeter that detects a current value supplied to the motor 13. The current supplied from the external power supply passes through the internal wiring 24 through the detection unit 7 and is supplied to the motor 13. That is, the associated physical quantity in the present embodiment is a current value, and the detection unit 7 detects the current value supplied to the motor 13 which changes with the change of the air volume.

The calculating unit 8 calculates a change in the current value detected by the detecting unit 7.

The control unit 9 operates the biasing unit 16 of the filter dust removal unit 6 based on the change in the current value calculated by the calculation unit 8 to perform biasing on the filter unit 5 and release of the biasing.

The above is the schematic configuration of the blower 50.

Subsequently, the automatic dust removing operation of the filter unit 5 in the blower 50 will be described.

Normally, in the blower 50, when the pressure loss increases due to the clogging of the filter unit 5, the air volume of the air carried by the blower unit 4 decreases and the load applied to the motor 13 decreases, so the current value supplied to the motor 13 Decreases.

In the present embodiment, the detection unit 7 detects the current value supplied to the motor 13 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 is reduced, and the control unit 9 transmits a signal to the energizing unit 16. By this signal, the urging unit 16 is operated, and at the same time, the operation of the blower unit 4 is stopped. When the biasing unit 16 operates, the electric motor 20 is supplied with power and is rotated to rotate the cam 21. When the cam 21 rotates, the filter portion 5 is biased by the action 41 of the projection portion 22, and the filter portion 5 rotates to the downstream side with the movable portion 17 as the rotation shaft 32.

Next, the protruding portion 22 of the cam 21 passes through the filter portion 5 to release the biasing of the biasing portion 16. When the biasing by the biasing unit 16 is released, only the reaction 42 of the counter biasing unit 18 acts on the filter unit 5, the filter unit 5 moves the movable unit 17 upstream as the rotation shaft 32, The filter unit 5 collides with the suppression unit 19 at the cleaning position 10. 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 surface on the upstream side of the filter unit 5. Therefore, by causing the filter unit 5 to collide with the suppression unit 19 from the downstream side, the dust collected by the filter unit 5 can be dropped to the upstream side, and the dust of the filter unit 5 can be removed. 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 simultaneously restart the operation of the blower unit 4.

As described above, the filter unit 5 is moved based on the change in the value of the current supplied to the motor 13 and collides with the suppression unit 19 to transmit the impact force directed to the upstream side to the dust and collect the dust. Dust in the filter unit 5 is removed. Therefore, clogging of the filter in long-term use reduces pressure loss increase, and maintenance frequency can be suppressed or eliminated 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 13, but may be the power value input to the motor 13. Further, the related physical quantity detected by the detection unit 7 may be used as the number of rotations of the motor 13.

When the related physical quantity is the rotation speed, the increase and decrease of the rotation speed differ according to the type of the blower. For example, in the case where the blower is a propeller fan, when the pressure loss increases due to the clogging of the filter, the air volume of the air carried by the blower 4 decreases and the torque of the motor 13 increases and the rotational speed decreases. That is, the detection unit 7 detects the decrease in the rotation speed as the associated physical quantity, and the calculation unit 8 calculates the change. Then, when the number of rotations falls below the set value, the air volume is considered to be decreasing, and the control unit 9 transmits a signal to the urging unit 16 to operate the urging unit 16 at the same time. Stop the operation of

Further, for example, when the blower is a sirocco fan, if the pressure loss increases due to the clogging of the filter, the air volume of the air carried by the blower unit 4 decreases and the torque of the motor 13 decreases, so the rotational speed increases. That is, the detection unit 7 detects an increase in the number of revolutions as a related physical quantity, and the calculation unit 8 calculates the change. When the rotational speed exceeds the set value, the air volume is considered to be decreasing, and the control unit 9 transmits a signal to the urging unit 16 to operate the urging unit 16 at the same time as the blower unit 4. Stop the operation of

Second Embodiment
A blower according to a second embodiment of the present invention will be described using FIG.

In the present embodiment, only the points different from the first embodiment will be described.

FIG. 4 is a side sectional view of the blower according to the second embodiment. In the blower 51 shown in FIG. 4, the detection unit 7 is a differential pressure gauge that detects the difference between the pressure in the housing 1 and the atmospheric pressure generated by the suction of the air into the housing 1 by the blowing unit 4. That is, the related physical quantity in the present embodiment is pressure. The detection unit 7 includes a pressure guiding pipe 25 and a pressure guiding pipe 26. The pressure guiding pipe 25 is configured to measure the pressure in the housing 1 and the pressure guiding pipe 26 is configured to measure the atmospheric pressure.

When the pressure loss increases due to the clogging of the filter unit 5, the air volume of the air carried by the blower unit 4 decreases, and the pressure in the housing 1 generated by suction into the casing 1 by the 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 is reduced, and a signal is sent from the control unit 9 to the biasing unit 16 to operate the biasing unit 16. The subsequent movement is the same as in the first embodiment, and is therefore omitted.

Third Embodiment
The blower according to the third embodiment of the present invention will be described using FIG.

FIG. 5 is a side cross-sectional view of the blower according to the third embodiment. The blower 52 shown in FIG. 5 further includes an outlet duct 27 provided in the outlet opening 3. The detection unit 7 is an anemometer having a wind speed sensor 28 and detects the wind speed of air passing through the blowout duct 27. That is, the related physical quantity in the present embodiment is the wind speed.

When the pressure loss increases due to the clogging of the filter unit 5, the air volume of the air carried by the blower unit 4 decreases. That is, the air volume of the air passing through the outlet duct 27 is reduced, and the wind speed of the air passing through the outlet duct 27 is reduced. 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 air volume passing through the blowout duct 27 from the wind speed and the cross-sectional area of the blowout duct 27. Then, when the amount of air 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. The subsequent movement is the same as in the first embodiment, and is therefore omitted.

Embodiment 4
A blower according to a fourth embodiment of the present invention will be described.

In the present embodiment, only the points different from the first to third embodiments will be described. Note that this embodiment can be implemented in combination with Embodiments 1 to 3.

In the present embodiment, control unit 9 stores the initial value of the related physical quantity in advance. Here, the initial value is the value of the related physical quantity in the state where the filter unit 5 is not clogged. In other words, when the filter unit 5 is clogged, the values of the associated physical quantities deviate from the initial values. The control unit 9 repeats the dust removing process by the filter dust removing unit 6 when the amount of deviation becomes equal to or larger than a predetermined range.

Specifically, the control unit 9 stores in advance the initial value of the related physical quantity in the storage unit. Then, the comparison unit compares the related physical quantity calculated by the calculation unit 8 with the initial value at predetermined timing, for example, every month. When it is determined that the calculated related physical quantity deviates from the initial value as a result of the comparison by the comparison section, the control section 9 specifically sets the difference between the calculated related physical quantity and the initial value within a predetermined range. When it is above, the dust removal process by the filter dust removal part 6 is repeated. The dust removal processing by the filter dust removal unit 6 is repeated by the control unit 9, for example, ten times, which is a predetermined upper limit number of repetitions.

When dust removal processing by the filter dust removal unit 6 is repeated, the control unit 9 performs calculation of the related physical amount by the calculation unit 8 and comparison with the initial value for each dust removal processing, and compares the related physical amount with the initial value. If a certain deviation amount falls below a predetermined range, the repetition is ended. Here, when the repetition of the dust removal processing has reached the predetermined repetition upper limit number, the control unit 9 ends the repetition of the dust removal processing. And control part 9 starts operation of filter dust removal part 6 based on change of related physical quantity again after a definite period of time progress from the end of repetition. Here, “after a predetermined period of time” is, for example, one month which is the same as a predetermined timing.

By the above processing, it is possible to repeat the dust removal processing according to the degree of clogging of the filter unit 5, to suppress the maintenance frequency, and to make the blower 50 usable for a long time in an efficient state.

Fifth Embodiment
First, a schematic configuration of a blower according to the fifth embodiment will be described with reference to FIGS. 6, 7 and 8. FIG. 6 is a schematic cross-sectional view in a side view of a blower according to Embodiment 5 of the present invention. FIG. 7 is a schematic cross-sectional view of the blower in a rear view. FIG. 8 is a perspective view of the blower with the top panel of the housing removed.

The blower 54 is provided with the housing | casing 131 and the ventilation part 160, as shown in FIG. The blower unit 160 includes an impeller 102, a casing 103, a motor 107, a belt 110, and a motor attachment 121.

As shown in FIG. 8, the housing 131 is a substantially rectangular hexahedron, and includes a top panel 135 and a hood 136. Moreover, the top surface opening 134, the suction opening 132, and the blowing opening 133 are provided in the housing | casing 131. As shown in FIG.

The top opening 134 is provided as an opening on the top of the housing 131 in the installed state.

The top panel 135 is a flat panel that can be attached to and detached from the housing 131, and can open and close the top opening 134 by attaching and detaching. The top panel 135 is fixed to the housing 131 using a screw or the like. By opening the top panel 135, access to the motor 107, the belt 110, the motor attachment 121, the

pulleys

108 and 109 described later, etc. stored inside the housing 131 becomes possible.

The suction opening 132 is provided as a rectangular opening on the front surface of the housing 131 in the installed state.

The hood 136 is disposed so as to cover the three surfaces above and on both sides of the suction opening 132 vertically outward from the front surface. The hood 136 includes an upper surface 141, a side surface 142, and a side surface 143.

The upper surface 141 is configured to project most from the housing 131 in the vertical direction from the front surface, starting from the vicinity of the upper side of the suction opening 132 on the front surface.

The side surface 142 and the side surface 143 are disposed to face each other, and are configured to protrude in the vertical direction from the front surface on the front surface and in the vicinity of the side of the suction opening 132. The side surface 142 and the side surface 143 have a substantially right triangle plate shape in which the distance to the front surface gradually decreases toward the lower side starting from the tip of the upper surface 141 in the protruding direction.

The blowout opening 133 is provided as an opening on the bottom surface of the housing 131 in the installed state. The blowout opening 133 is an opening having a shape that matches the casing blowout port 105 that is the blowout port of the casing 103. The air blown out to the outside of the housing 131 through the blowout opening 133 is supplied to, for example, an air conditioner of a house or a building.

As shown in FIGS. 6 and 7, the impeller 102 has a substantially cylindrical shape and has blades on its circumference, and rotates around a rotation shaft 101 (first rotation shaft) to blow wind. It is a fan, and specifically, a sirocco fan or a turbo fan can be applied. The impeller 102 is provided with a pulley 108 on a rotating shaft 101.

The casing 103 has a spiral scroll 103d, a casing side plate 103a which sandwiches the scroll 103d to form one surface of the casing 103, and a casing side plate 103b which forms the other surface of the casing 103. The casing 103 incorporates the impeller 102. The casing 103 is provided with a casing inlet 104 and a casing outlet 105. In addition, the casing 103 includes a tongue portion 103 c inside the casing 103. A support 103 e is welded to the casing 103. An installation rack 111 is disposed on the bottom of the housing 131. The casing 103 is fixed to the upper part of the installation stand 111 with a bolt and a nut in the installed state of the installation stand 111.

The casing suction port 104 is provided at a flat surface of the cylindrical shape of the impeller 102 in the casing 103, that is, at a position facing the casing side plate 103a and the casing side plate 103b, as an opening for sucking air into the casing 103 inside. In the present embodiment, as shown in FIG. 7, the casing suction ports 104 are provided on both side surfaces of the casing 103. Specifically, the casing suction port 104 has a circular shape, and is provided at one place near the center of the casing side plate 103b or at two places near the center of the casing side plate 103a and the casing side plate 103b.

The casing outlet 105 is an opening for blowing out the air sucked into the inside of the casing 103 through the casing inlet 104, and is provided at a position opposed to the outlet 133 provided on the bottom surface of the housing 131. The casing outlet 105 is connected to the outlet opening 133 to blow out the air sucked into the housing 131 via the suction opening 132 to the outside of the housing 131.

The motor 107 rotates about the rotation shaft 106 (second rotation shaft). The motor 107 includes a pulley 109 on the rotating shaft 106. The motor 107 is fixed to the casing 103 via a motor attachment 121. The rotating shaft 101 and the rotating shaft 106 can be changed in distance from each other by the motor attachment 121 so that the axial direction always remains parallel.

The belt 110 transmits the power of the motor 107 to the impeller 102 via the pulley 108 inserted into the rotating shaft 101 and the pulley 109 inserted into the rotating shaft 106.

The motor attachment 121 is made of a steel plate, and as shown in FIG. 7, fixes the motor 107 to the casing 103. Specifically, as shown in FIG. 9, the motor attachment 121 includes a pedestal portion 122, a pivot portion 123, and a pedestal fixing portion 125.

Hereinafter, the detailed structure of the motor attachment 121 will be described with reference to FIG. FIG. 9 is a perspective view of the motor attachment 121. As shown in FIG.

The pedestal portion 122 has a fixed surface 129 on which the motor 107 is disposed, and a back surface 130 which is a back side of the fixed surface 129, and has a rectangular plate shape. The back surface 130 faces the scroll 103 d. One side of the pedestal portion 122 is longer than the distance between the casing side plate 103 a and the casing side plate 103 b. That is, at least one of the casing side plate 103a and the casing side plate 103b, the protrusion 144 of FIG. 7 is formed on the side of the casing side plate 103a or the casing side plate 103b. That is, the back surface 130 of the protrusion 144 is disposed at an angle that deflects the air flow 145 from the direction of the suction opening 132 to the air flow 146 in the direction of the casing suction port 104 in a side view of the casing 103 (FIG. 6). In other words, the motor attachment 121 is disposed on the downstream side of the upper portion of the casing 103 such that the back surface 130 faces the suction opening 132 and the casing suction port 104. The pedestal portion 122 includes, for example, pivots 123 at both ends of one side, that is, at one end, and pedestal fixing portions 125 at both ends of the other side opposite to one side having the pivots 123, that is, the other end. In the pedestal portion 122, a long hole 128 elongated in one direction is provided in the vicinity of the other end where the pedestal fixing portion 125 is provided.

The bearing portion 123 is rotatably fixed on both sides of the outer wall of the casing 103, that is, the casing side plate 103a and the casing side plate 103b. That is, the shaft support portion 123 is fixed by a nut welded to the casing side plate 103a and the casing side plate 103b and a fixing bolt 124 corresponding to the nut. By loosening the two fixing bolts 124, the pivoting portion 123, that is, the motor attachment 121 can be pivoted about the rotation axis with a line connecting the two fixing bolts 124 constituting the pivoting portion 123 as a rotation axis. Become.

The pedestal fixing portion 125 is fixed to the casing 103 with the both sides of the casing 103, that is, the casing side plate 103a and the casing side plate 103b. In the pedestal fixing portion 125, one end of an L-shaped L fitting 126 is fixed to the casing side plate 103a (or the casing plate 103b), and the other end of the L fitting 126 is welded to the lower end of the round bar 127 or fixed by a bolt and a nut It is done. The upper end of the round rod 127 penetrates the long hole 128 and functions as a bolt. That is, the two nuts passed through the round rod 127 sandwich the round rod 127 penetrating the long hole 128 from the vertical direction of the pedestal portion 122, thereby separating the pedestal portion 122 from the outer periphery of the scroll 103d by a fixed distance. Fix to In other words, the pedestal fixing portion 125 fixes the rotation of the pivot portion 123.

The above is the schematic configuration of the blower 54.

Subsequently, the change of the position of the motor 107 in the blower 54 will be described in detail with reference to FIG. Generally, in a belt-driven centrifugal fan, it is necessary to adjust the length of the belt between the pulleys at the time of installation, that is, between the rotating shaft 101 of the impeller 102 and the rotating shaft 106 of the motor 107. Furthermore, it is necessary to correct the belt deflection which occurs as time passes. And, such adjustment of the belt is performed by changing the distance between the rotating shaft 101 and the rotating shaft 106.

In the present embodiment, the motor attachment 121 is fixed to the upper portion of the casing 103 in the installed state of the casing 103, more specifically to the outer side (position farther from the rotation shaft 101) than the outer peripheral end of the casing 103. There is.

In this state, the two nuts at the upper end of the round bar 127 of the pedestal fixing portion 125 are loosened. Thereby, the fixation of the pedestal portion 122 by the pedestal fixing portion 125 is released.

Next, in a state where the fixing of the pedestal portion 122 is released, the tightening of the support portion 123 by the nut and the fixing bolt 124 is loosened. Thus, the shaft support portion 123 is a rotary shaft 140 fixing the shaft support portion 123 to the casing 103, strictly speaking, a line connecting two fixing bolts 124 fixing the shaft support portion 123 to the casing 103 And becomes rotatable.

When the bearing 123 is rotatable with respect to the casing 103, the rotation shaft 106 of the motor 107 can move on the circumference of a circle centered on the rotation shaft 140. Therefore, by rotating around the rotation axis 140, the inter-axis distance Y between the rotation axis 106 and the rotation axis 101 can be changed. When changing the inter-axis distance Y, since the round rod 127 penetrates the long hole 128, the round rod 127 slides in the long hole 128 according to the rotation of the motor attachment 121. There is.

Based on this, the inter-axial distance Y can be changed to, for example, the inter-axial distance Y ', and tension adjustment of the belt 110 becomes possible. After adjusting the tension of the belt 110, the rotation of the shaft support portion 123 is suppressed by the nut and the fixing bolt 124, and the two nuts of the pedestal fixing portion 125 are tightened to fix the pedestal portion 122 to the casing 103. The shaft support portion 123 and the pedestal fixing portion 125 are disposed at both ends of the pedestal portion 122, so the motor attachment 121 is firmly fixed to the casing 103.

As described above, the inter-axial distance Y can be changed by fixing the motor attachment 121 above the casing 103 and rotating the shaft support portion 123. For this reason, the installation area of the housing 131 can be made smaller than in the configuration in which the motor mounting tool is disposed on the bottom surface of the housing and slid in the horizontal direction to change the distance between the shafts, and the workability is improved. be able to.

In addition, since the motor attachment 121 is disposed on the upper portion of the casing 103 and the top opening 134 is provided, even when another device or the like is disposed around the casing 131, from above, it is The interaxial distance Y can be easily changed, that is, the maintainability can be improved.

Further, since the pedestal fixing portion 125 is provided in the vicinity of the other end with respect to the shaft support portion 123 provided at one end of the pedestal portion 122, the motor 107 can be firmly fixed to the casing 103. Can prevent loosening and detachment of the

Further, the back surface 130 can deflect the air flow of air sucked in from the direction of the suction opening 132 in the direction of the casing suction port 104 and rectify the air flow inside the housing. That is, the amount of blowoff air can be increased by utilizing the motor attachment 121 which can normally cause pressure loss.

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.

DESCRIPTION OF

SYMBOLS

1, 131

Case

2, 132, 204

Suction opening

3, 133, 205 Blow-off opening 4, 160 Blower part 5 Filter part 6 Filter dust removal part 7 Detection part 8 Calculation part 9 Control part 10 Purification position 11

Centrifugal fan

12, 102 blade Car 13

Motor

14, 108, 109

Pulley

15, 110, 307 Belt 16 Biasing part 17 Movable part 18 Opposite biasing part 19 Restraining part 20 Motor 21 Cam 22 Protrusive part 23 Spring 24

Internal wiring

25, 26 Conductor tube 27 Blowing out duct 28

Wind speed sensor

31, 32, 140, 306 Rotation axis 41 Action 42

Reaction

50, 51, 52, 54, 203 Blower 101 Rotation axis (first rotation axis)
106 axis of rotation (second axis of rotation)

Claims

A housing provided with a suction opening for sucking air and a blow-off opening for blowing out the air sucked through the suction opening;
A blower which guides the air from the suction opening to the blowout opening;
A filter portion provided at the suction opening for purifying the air sucked into the housing at a purification position;
A filter dust removing unit for removing dust from the filter unit;
A detection unit that detects an associated physical quantity that changes with an air volume of the air sucked into the housing by the blower unit;
A calculation unit that calculates a change in the related physical quantity;
A control unit that operates the filter dust removal unit based on a change in the associated physical quantity calculated by the calculation unit.
The filter dust removing unit is
An urging unit for urging the filter unit to the downstream side of the purification position;
A movable portion for moving the filter portion to the downstream side based on the biasing by the biasing portion;
A counter-biasing unit that biases the filter unit upstream with respect to biasing by the biasing unit;
And a suppression unit configured to suppress movement of the filter unit to the upstream side of the purification position.
The counter biasing unit
The air blower according to claim 1, wherein the filter unit is moved to the upstream side by a reaction to the release of the urging by the urging unit to cause the filter unit to collide with the restraining unit.
The blower includes a motor.
The detection unit is
The blower according to claim 1, wherein a current value supplied to the motor is detected as the associated physical quantity.
The blower includes a motor.
The detection unit is
The blower according to claim 1, wherein a value of power supplied to the motor is detected as the associated physical quantity.
The detection unit is
The air blower according to claim 1 or 2, wherein a difference between a pressure in the casing and an atmospheric pressure, which is generated by suction of the air into the casing by the blower unit, is detected as the associated physical quantity.
It further comprises an outlet duct provided at the outlet opening,
The detection unit is
The air blower according to claim 1 or 2, wherein a wind speed of air passing through the blowout duct is detected as the associated physical quantity.
The blower includes a motor.
The blower according to claim 1, wherein the detection unit detects a rotational speed of the motor as the associated physical quantity.
The control unit
The initial value of the related physical amount is compared with the related physical amount calculated by the calculation unit, and when there is a difference between the initial value and the calculated related physical amount as a result of the comparison, a predetermined range or more is present. The fan according to any one of claims 1 to 7, wherein dust removal processing by the filter dust removal unit is repeated.
The control unit
When the repetition of the dust removal processing reaches the predetermined repetition upper limit number, the repetition of the dust removal processing is ended, and the operation of the filter dust removal part based on the change of the related physical quantity is started after a predetermined period has elapsed from the end of the repetition. The blower according to claim 8.
The blower unit is
An impeller rotating about a first rotation axis;
A casing having a spiral shape and incorporating the impeller;
A motor that rotates about the second axis of rotation;
A belt connecting the first rotation shaft and the second rotation shaft to transmit the power of the motor to the impeller;
And a motor attachment for securing the motor to the casing.
The motor attachment is
A pedestal for fixing the motor;
The blower according to claim 1, further comprising: a pivot portion rotatably connecting the pedestal portion to the outer wall of the casing.
The shaft branch is
The fan according to claim 10, wherein the fan pivots to change the distance between the first rotation shaft and the second rotation shaft.
The motor attachment is
The air blower according to claim 10, further comprising: a pedestal fixing portion configured to fix rotation of the pivot portion.
The pedestal fixing portion is
The air blower according to claim 12, wherein the blower is provided in the vicinity of the other end with respect to the shaft support provided at one end of the pedestal.
The motor attachment is
The blower according to any one of claims 10 to 13, wherein the blower is fixed to an upper portion of the casing in an installed state of the casing.
In the casing,
A casing suction port for drawing air into the casing;
The blower according to any one of claims 10 to 14, further comprising: a casing outlet for blowing out the air sucked from the casing inlet.
The pedestal portion is
A fixed surface on which the motor is disposed;
And a back surface that is a back surface of the fixed surface,
The back side is
The air blower according to claim 15, wherein the air flow from the direction of the suction opening is deflected in the direction of the suction port of the casing in a side view of the casing.
The housing is
The fan according to claim 15 or 16, further comprising a top panel for opening and closing a top opening provided on the top surface in the installation state of the housing.