JP4588350B2 - Blower - Google Patents

Description

  The present invention relates to a blower that can easily remove dust adhering to a filter, a protective guard, and the like in a blower having a filter and a protective guard at a suction port.

Patent Document 1 describes a blower that cleans the suction port with a conventional blower. This is done by providing a hot air flow path between the air intake on the back of the frame and the hot air outlet on the front, installing a convection fan near the air intake, sending indoor air from the air intake to the hot air flow path, In the heater that blows out from the hot air outlet, instead of the wind, a filter is attached to the back of the convection fan, and a brush that moves in close contact with the outside of the filter is attached, and the brush is moved by the drive member when cleaning the filter, By reversing the convection fan, dust attached to the filter is removed with a brush, and the filter is cleaned by blowing away with the wind of the convection fan.
In addition, a heat treatment apparatus such as a drier is known that cleans a filter by rotating an axial fan reversely (see, for example, Patent Document 2).

JP-A-8-210705 (Claim 1, FIG. 1) JP-A-5-126467 (Claim 1, FIG. 1)

In a blower having a suction port provided with a conventional filter or protective guard, it is assumed that dust or the like adheres to the suction port and causes clogging. In that case, the filter or protective guard was removed and the cleaning was performed periodically.
However, when the blower is mounted at a high place, there is a problem that regular cleaning cannot be performed unless a scaffold is assembled, which results in heavy labor and high maintenance costs. When the blower is installed in a place where it is difficult to perform regular maintenance, there is a problem that the suction port is blocked by the adhesion of dust or the like and the blower cannot be blown.
Moreover, in the air blower which cleans a suction inlet by reversely rotating an axial fan, there exists a subject that the dust of the center part of a fan cannot be blown away but remains. Furthermore, when dust etc. adhere and time passes, there also exists a subject that dust adheres to a filter or a protection guard, and cannot blow off.
If a blower as shown in Patent Document 1 is used, the suction port can be cleaned, but a movable brush for removing dust adhering to the filter must be provided as a separate device, which is costly. There is such a problem. Moreover, since the mechanism is movable, there is a problem that maintenance of the brush itself is required.
Moreover, in patent document 2, since it is necessary to perform the reverse rotation operation of an axial fan manually, there exists a subject that operation is troublesome.

  The present invention has been made to solve the above-described problems, and in a blower having a filter and a protective guard at the suction port, dust attached to the filter and the protective guard can be easily and automatically removed. An object is to obtain a blower that can be used.

In order to solve the above-mentioned problem, the blower according to the present invention is capable of forward rotation and reverse rotation provided in a main body box having a suction port on the back side and a blow-out port on the front side, and the main body box. A motor, an axial fan attached to the rotating shaft of the motor, a filter or protective guard attached to the suction port, and a filter or protective guard corresponding to the central part of the axial fan The outer diameter of the disk is 45 to 65% of the outer diameter of the axial fan, and the filter or the guard is configured in a lattice shape. The control circuit is provided with switch means for switching the rotation direction of the motor to the opposite direction, and a time switch for setting the operation time of the switch means, and is operated in reverse at certain time intervals. It was carried out, and is characterized in that for cleaning by blowing off dust attached to the filter or guard.

According to the present invention, the dust attached to the filter or the protective guard attached to the suction port is cleaned by reversing and blowing off the axial fan at regular intervals before it is fixed. Clogging factor can be eliminated.
Further, even when the blower is installed at a high place, the filter or the protective guard can be easily and automatically cleaned.
Furthermore, since the air can be blown well without clogging the filter and the protective guard, there is an effect that the number of periodic maintenance can be reduced and the maintenance cost can be reduced.

  Embodiments of the present invention will be described below with reference to the drawings.

Embodiment 1 FIG.
1 is a cross-sectional view showing the internal structure of a blower according to Embodiment 1 of the present invention, FIG. 2 is a rear view of a blower equipped with, for example, three blowers of FIG. 1, FIG. 3 is a plan view of FIG. FIG. 3 is a front view of FIG. 2. FIG. 5 is a circuit diagram in the present embodiment.
The air blower 10 is installed in a ceiling-mounted state, a floor-mounted state, or a wall-mounted state for indoor air blowing or cooling of equipment. The blower 10 includes a main body box 1 having a six-sided box shape, and the main body box 1 is provided with a suction port 2 on the back side and an outlet port 3 on the front side. Moreover, the inside of the main body box 1 is partitioned according to the number of blowers. FIG. 1 shows a single blower, and FIG. 2 shows a three blower. In the main body box 1, an axial fan 4 provided inside the orifice 6 and a motor 5 that rotates the axial fan 4 attached to the rotating shaft in the forward and reverse directions are attached to each blower. Further, a common air guide 7 for forming the blowout port 3 on the front side is attached.
The suction port 2 is provided with a filter or protective guard 8 so that dust or foreign matter does not enter the main body box.

The airflow sucked from the suction port 2 is blown from the blowout port 3 through the axial fan 4 and the air guide 7 in the orifice 6. For example, in the case of indoor ventilation, dust floating in room air adheres when passing through a filter or protective guard 8 attached to the suction port 2 and accumulates on the filter or protective guard 8. In particular, as the amount of dust in the room increases, the filter or the protective guard 8 often clogs in a short time. If the air blower is used while being clogged, the predetermined air blowing ability cannot be sufficiently exhibited.
Further, when the air blower is installed at a high place, it is necessary to assemble a scaffold when removing the clogging of the filter or the protective guard 8, which is very labor-intensive and dangerous. For this reason, a large amount of maintenance costs are required.

Therefore, in the present embodiment, as shown in FIG. 5, the control circuit of the motor 5 is provided with switch means 11 (for example, a relay switch) for switching the rotation direction of the motor 5 to the opposite direction and the operation time of the switch means 11. A time switch 12 to be set is incorporated. The control circuit of the motor 5 may be provided inside the main body or may be provided outside.

According to the present embodiment, when the time set by the time switch 12 is reached, the time switch 12 is turned on, and the switch unit 11 is switched from the solid line position shown in FIG. 5 to the broken line position. As a result, the motor 5 switches from the forward rotation state to the reverse rotation state, so that the air flow is reversed in the direction of exiting from the suction port 2, and the dust accumulated in the filter or the protective guard 8 attached to the suction port 2 is fixed. It can be blown away and cleaned before. For example, if the time for performing the reverse operation is set outside the working hours, there will be no problem due to dust flying. In addition, by setting an appropriate reverse rotation operation time, it is possible to reduce dust from adhering to the filter or the protective guard 8 as much as possible.
The time switch 12 is turned off when a predetermined reverse operation time elapses, whereby the switch means 11 switches the motor 5 to the forward rotation side (solid line position in FIG. 5).
Due to the structure of the blower 10, the cleaning work due to clogging of the filter or the protective guard 8 can be completed easily and automatically without removing the filter or the protective guard.

Embodiment 2. FIG.
In the present embodiment, in the first embodiment, the time switch 12 causes the blower to reversely operate only for a certain period of time when the operation is started, thereby providing the function of cleaning. Thereby, even if the power is turned off outside the operation time, the filter or the protective guard 8 can be cleaned without any problem.

Embodiment 3 FIG.
In the present embodiment, in the first embodiment, the time switch 12 causes the blower to reversely operate only during a certain period of time when the operation ends and to have a cleaning function. Thereby, even if the power is turned off outside the operation time, the filter or the protective guard 8 can be cleaned without any problem.

Embodiment 4 FIG.
In the present embodiment, since the wind flow is weak at the central portion of the axial fan 4 in the first embodiment, dust attached to the front surface (front surface viewed from the back side in FIG. 1) of the axial fan center portion is removed. For a portion that cannot be blown away, a disk 9 is attached to the center of the filter or protective guard 8 corresponding to the center of the axial fan 4. Thereby, the dust adhering to the center part vicinity of the axial fan 4 can be decreased. If the size of the disk 9 is too large, the air blowing capability will be reduced, and if it is too small, dust will start to accumulate on the filter or the protective guard 8, so that the size can be set to an appropriate size. It is an important point.
The outer diameter of the disk 9 that ensures the air blowing capability and does not deposit dust on the filter or the protective guard 8 is set to 45 to 65% of the outer diameter of the axial fan.
In the present embodiment, any one of the first to third embodiments is performed.

Embodiment 5 FIG.
In the present embodiment, in the first embodiment, the air volume at the time of reverse operation is made larger than that at the time of normal operation. That is, the control circuit is configured to increase the number of rotations of the motor 5 during the reverse rotation operation than during the normal rotation operation. Thereby, the filter or the protective guard 8 can be effectively cleaned in a short time.

Embodiment 6 FIG.
In the present embodiment, in Embodiment 1, the function of adjusting the air volume during the reverse rotation operation to be smaller than that during the normal rotation operation is provided. That is, the control circuit is configured so that the number of rotations of the motor 5 is reduced during the reverse rotation operation than during the normal rotation operation. As a result, it is possible to cope with the problem of dust flying when the filter or the protective guard 8 is cleaned.

It is sectional drawing which shows the internal structure of the air blower in embodiment. It is a rear view of the air blower with three air blowers. FIG. 3 is a plan view of FIG. 2. FIG. 3 is a front view of FIG. 2. It is a circuit diagram of the air blower in an embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Main body box body, 2 Suction port, 3 Outlet port, 4 Axial fan, 5 Motor, 6 Orifice, 7 Air guide, 8 Filter or protection guard, 9 Disc, 10 Blower, 11 Switch means, 12 Time switch.

Claims (1)

A main body box having a suction port on the back side and a blow-off port on the front side, a motor provided inside the main body box capable of normal rotation and reverse rotation, and an axial fan attached to the rotation shaft of the motor And a filter or a protective guard attached to the suction port, and a disc attached to a central portion of the filter or protective guard corresponding to a central portion of the axial fan, the outer diameter of the disc being Switch means having a size of 45 to 65% with respect to the outer diameter of the axial fan, and the filter or protection guard being configured in a lattice shape, and switching means for switching the rotation direction of the motor to the opposite direction to the control circuit of the motor And a time switch that sets the operating time of the switch means, and performs reverse operation at a certain time interval and adheres to the filter or the protective guard. Blower, characterized in that for cleaning blowing dust was.

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