KR102540695B1 - Blowing device for forward and counter rotation - Google Patents

Abstract

The present invention provides an air blower for normal/reverse rotation, which is able to selectively perform the air supply and the air emission and increase the airflow rate when needed. According to a proper embodiment of the present invention, the air blower for normal/reverse rotation comprises: an air blower casing having an inlet on one end and an outlet on the other end; an air blower motor installed on a center axis of the air blower casing; a blade hub inserted into and mounted on the rotation shaft of the air blower motor; a blade supporter mounted on the blade hub and having a large number of blade bonding plates formed at regular intervals; and a plate-shaped axial flow-type blade fixed on the blade supporter. The blade bonding plate is inclined at the same alternate angle toward a centerline of the rotation shaft of the air blower motor for generating the same emitted air flow rate of the axial flow-type blade during the normal or reverse rotation.

Description

Blowing device for forward and counter rotation {Blowing device for forward and counter rotation}

The present invention relates to a blower used for ventilation, and more particularly, to a blower for forward/reverse rotation capable of selectively supplying and exhausting air and increasing the amount of air blown when necessary.

Blowers are generally used to improve indoor air quality by supplying outdoor air to indoors. As such, the blower is used to forcibly induce a flow of air to replace indoor air with outside air or to remove gases such as toxic gas in a specific area.

In the case of underground parking lots, the airtightness is high, and the exchange between outside air and inside air is not smooth. Because of this, when smoke cannot be controlled or toxic gases cannot be discharged in the event of a fire, serious human casualties are inevitable. It also adversely affects the rescue and suppression activities of the fire brigade. In particular, in the case of domestic underground parking lots, there are only regulations for fire extinguishing facilities and alarm facilities, and there are no special regulations for smoke control or smoke exhaust, so the risk is greater when the initial fire suppression fails.

Ventilation equipment of a general underground parking lot supplies air through a blower, induces pollutants toward the exhaust through a manned fan, and discharges polluted air through an exhaust fan. Therefore, even in the event of a fire, since the blower only supplies air, rapid discharge of toxic gases cannot be expected, increasing the risk of suffocation.

As such, the ventilation equipment of the underground parking lot is for the purpose of inflow of outside air and discharge of vehicle exhaust gas or pollutants, so a blower device that can quickly discharge toxic gases that cause casualties in case of fire is required.

As a background technology of the present invention, Korean Patent Publication No. 10-2022-0003880 (Patent Document 1), a 'blowing device' has been proposed. This is to minimize the swirl flow by including the double inverted blade, thereby minimizing the decrease in air volume due to the purification filter, and enabling stable torque to be maintained. However, this background art cannot be used in combination with the supply and exhaust because the ventilation is performed in one direction only. Therefore, when a blower is installed for air supply, there is a problem in that the toxic gas in the room cannot be quickly discharged to the outside in case of fire.

Korean Patent Publication No. 10-2022-0003880

An object of the present invention is to provide a blower for forward/reverse rotation capable of selectively performing air supply and exhaust and increasing the amount of air blown when necessary.

A blower device for forward/reverse rotation according to a preferred embodiment of the present invention includes a blower casing having a suction port at one end and a discharge port at the other end; a blower motor supported and installed on the central axis of the blower casing; a wing hub fitted to the rotating shaft of the blower motor; a wing support mounted on the wing hub and having a plurality of wing joining plates formed at regular intervals; It has a plate-shaped axial flow type blade fixed to the wing support, but the blade joint plate is tilted at the same offset angle with respect to the center line of the rotation axis of the blower motor in order to generate the same discharge air volume of the axial flow type blade during forward and reverse rotation. It is characterized by having.

In addition, the blower casing has a positive direction region (D) partitioned toward the discharge port based on a vertical reference line (Y) passing through the center of the wing support, and a shape in which the positive direction region (D) is larger toward the suction port and smaller toward the discharge port. It is characterized in that the long holes for increasing forward inflow through are arranged in the circumferential and axial directions to increase the forward airflow amount (Q1).

In addition, in the blower casing, a reverse region R is partitioned toward the inlet on the basis of a vertical reference line Y passing through the center of the wing support, so that the circumference of the reverse region R is larger toward the discharge port and smaller toward the inlet port. It is characterized in that long holes for increasing reverse inflow through are arranged in the circumferential and axial directions to increase the amount of reverse air flow (Q2).

In addition, in order to adjust the discharge flow rate of the blowing casing during reverse rotation of the blowing motor, it is installed concentrically on the outside of the blowing casing to form a second suction passage between the blowing casing and the outer circumferentially circularly arranged a casing for adjusting the discharge flow rate having a second forward inlet and a second reverse inlet; a forward discharge flow rate adjusting door hinged to the discharge flow rate adjusting casing to open and close the second forward inlet; a reverse discharge flow rate adjusting door hinged to the discharge flow rate adjusting casing to open and close the second reverse inlet; It is characterized in that it includes first and second door operating means for rotating the door for adjusting the discharge flow rate in the forward direction and the door for adjusting the discharge flow rate in the reverse direction, respectively.

In addition, the first door operating means includes a first door motor fixed to the side of the casing for adjusting the discharge flow rate; a first transfer screw directly connected to the rotation shaft of the first door motor; A transfer block that is screwed to the first transfer screw and moves linearly; a synchro ring that is coaxially inserted outside the casing for adjusting the discharge flow rate and hinged to the transfer block; A first door lever having one end hinged to the synchro ring and the other end hinged to the forward discharge flow rate adjusting door to open and close the forward discharge flow rate adjusting door according to the rotational direction of the first door motor.

In addition, the second door operating means includes a second door motor fixed to the side of the casing for adjusting the discharge flow rate; a second transfer screw directly connected to the rotating shaft of the second door motor; a second transfer block that is screwed to the second transfer screw and linearly moves; a second synchro ring that is coaxially inserted outside the casing for adjusting the discharge flow rate and is hingedly connected to the second transfer block; A second door lever having one end hinged to the second synchro ring and the other end hinged to the door for forward discharge flow rate adjustment to open and close the reverse discharge flow rate adjustment door according to the rotational direction of the second door motor.

In addition, the blower motor is characterized in that it is operated by selecting a contact point A (forward rotation) and a contact point B (reverse rotation) by being circuitically connected to a relay switch or a magnet switch.

When the blower for forward/reverse rotation of the present invention is installed in a ventilation facility, it can normally supply air, and in the special case of a fire, it can be driven in reverse rotation to discharge toxic gases to the outdoors, thereby preventing human casualties indoors. can In addition, it is possible to economically appropriately adjust the amount of air supply and exhaust through the control of the blower. In addition, the inflow amount is increased through the long hole for inflow increase formed in the ventilation casing of the blower device, so that ventilation performance can be improved. In addition, survivability can be further improved by increasing the discharge flow rate during reverse rotation of the blower to increase the discharge performance of toxic gases.

The following drawings attached to this specification illustrate a preferred embodiment of the present invention, and together with the detailed description of the present invention serve to further understand the technical idea of the present invention, the present invention is limited to those described in the accompanying drawings. It should not be construed as limiting.
1 is a partially cut perspective view of a blower according to an embodiment of the present invention;
Figure 2 is a side view of Figure 1;
Figure 3 is a front view of the blower motor shown in Figure 1 and the axial flow blades connected thereto.
Figure 4 is a coupled state diagram of the axial flow wing and wing support shown in Figure 3;
FIG. 5 is a circuit diagram for controlling normal and reverse rotation of the blower motor of FIG. 5;
6 is a modified perspective view of a blower applied to an embodiment of the present invention.
Figure 7 is a front view of Figure 6;
8 is another modified perspective view of a blower applied to an embodiment of the present invention.
Figure 9 is a front view of Figure 8;
10 is a side view of FIG. 9;
Fig. 11 is a front sectional view of Fig. 9;
12 is a view showing a state in which the door for adjusting the discharge flow rate in the reverse direction is opened in FIG. 11;
13 is a view showing a state in which the door for adjusting the discharge flow rate in the forward direction is opened in FIG. 11;
14 is a perspective view of a casing for adjusting discharge flow applied to FIG. 8;

Below, the present invention will be described in detail with reference to the embodiments presented in the accompanying drawings, but the presented embodiments are illustrative for a clear understanding of the present invention, and the present invention is not limited thereto.

Blower device 12 according to an embodiment of the present invention, as shown in FIGS. 1 to 4, a blower casing 121 having a suction port 121a at one end and a discharge port 121b at the other end, and Having a blower motor 123 supported on, a wing hub 124 fitted to the rotational shaft of the blower motor 123, and a plurality of wing bonding plates 125a mounted on the wing hub 124 and formed at regular intervals. It has a wing support 125 and a plate-shaped axial flow type wing 126 fixed to the wing support 125. At this time, the blade joining plate 125a is tilted at the same offset angle θ with respect to the center line X of the rotation axis of the blower motor 123 in order to generate the same discharge air volume of the axial flow type blade 126 during forward and reverse rotation. has a structure

In this way, the axial flow type blades 126 of the blower 12 are manufactured symmetrically at the angle tilted by the blade support 125, so that the same amount of air comes out during forward rotation and reverse rotation. Therefore, the blower 12 can supply air in normal times (when there is no fire), and in particular, in the event of a fire, it can rotate in reverse to quickly exhaust the same amount of air.

The blower motor 123 may be manually adjusted to high (1120 rpm), medium (900 rpm), or weak (600 rpm) through phase control (voltage control method). In addition, the blower motor 123 is electrically connected to, for example, a fire detection sensor so that the rotational speed can be automatically selected and adjusted. As such, the blower 12 can manually or automatically select and control the rotational speed of the blower motor 123, enabling economical operation.

Here, the blower 12 may select contact point A (forward rotation) and contact point B (reverse rotation) by the relay switch 13 or the magnet switch as shown in FIG. 5 .

On the other hand, as shown in FIGS. 6 and 7, the deformed blowing casing 121 is divided into a forward region D and a reverse region R, which are bisected by a vertical reference line Y passing through the center of the wing support 125, On the periphery of the forward region D, long holes 1211 for increasing inflow in the forward direction are arranged in the circumferential and axial directions in a shape that is larger toward the suction port 121a and smaller toward the discharge port 121b, and is arranged in the circumferential and axial directions, and ) may have a structure in which a long hole 1212 for increasing reverse inflow is formed around the discharge port 121b and becomes smaller toward the suction port 121a.

Therefore, the blower 12 can increase the ventilation power by increasing the amount of air supplied by introducing additional air through the long hole 1211 for increasing forward inflow at normal times. In addition, the blower 12 rotates in the reverse direction in the event of a fire, so that more smoke and toxic gas can be introduced and discharged to the outside through the long hole 1212 for increasing reverse inflow.

On the other hand, in order to adjust the flow rate discharged from the blowing casing 121 of the blowing device 12, the present invention is installed concentrically on the outside of the blowing casing 121 as shown in FIGS. 8 to 12 and the blowing casing 121 A second suction passage 131a is formed between the casing 131 for adjusting the discharge flow rate having a second forward inlet 131b and a second reverse inlet 131c circularly arranged around the outer circumferential surface, and a second positive direction A forward discharge flow rate adjusting door 132 hinged to the discharge flow rate adjusting casing 131 to open and close the inlet port 131b, and a discharge flow rate adjusting casing 131 to open and close the second reverse inlet port 131c. It may include a reverse discharge flow rate adjusting door 133 and first and second door operating means 141 and 142 for rotating and operating the forward discharge flow rate adjusting door 132 and the reverse discharge flow rate adjusting door 133, respectively.

Here, the second forward inlet (131b) and the second reverse inlet (131c) are slightly larger than the corresponding door to the rear of the hinge so that there is no collision in opening the closed discharge flow rate adjustment door 132 and the second reverse inlet (131c). It is preferable to configure

The first door operating means 141 includes a first door motor 1411 fixed to the side of the casing 131 for adjusting the discharge flow rate, a first transfer screw 1412 directly connected to the rotational shaft of the first door motor 1411, A transfer block 1413 that is screwed to the first transfer screw 1412 and moves linearly, and a synchro ring 1414 that is coaxially inserted outside the casing 131 for adjusting discharge flow and hinged to the transfer block 1413 , One end is hinged to the synchro ring 1414 and the other end is hinged to the door 132 for adjusting the discharge flow rate in the forward direction according to the rotation direction of the first door motor 1411 The first opening and closing of the door 132 for adjusting the discharge flow rate It can be composed of one door lever (1415).

Therefore, when the first door motor 1411 is driven while the door 132 for adjusting the discharge flow rate in the forward direction is closed, the transfer block 1413 linearly moves in the first transfer screw 1412 and at the same time the synchro ring 1414 moves forward. As shown in FIG. 13, all the forward discharge flow control doors 132 hinged to the synchro ring 1414 open at the same time, so that the inflow into the blowing casing 121 increases and the air supply amount Q1 can be increased, thereby increasing ventilation performance this improves

As described above, according to the present invention, the door 132 for adjusting the discharge flow rate in the forward direction arranged in a circle in the blower 12 has a simple structure that can be opened at the same time, so that there is no fear of failure and the manufacturing cost can be reduced.

On the other hand, the second door operating means 142 includes a second door motor 1421 fixed to the side of the casing 131 for adjusting the discharge flow rate, and a second transfer screw 1422 directly connected to the rotational shaft of the second door motor 1421. And, a transfer block 1423 screwed to the second transfer screw 1422 and moving linearly, and a synchro ring 1424 that is coaxially inserted outside the casing 131 for adjusting discharge flow and hinged to the transfer block 1423 ), and one end is hinged to the synchro ring 1424 and the other end is hinged to the door 132 for forward discharge flow rate adjustment, opening and closing the door 132 for forward discharge flow rate adjustment according to the rotation direction of the second door motor 1421 It may be composed of the second door lever 1425.

Therefore, when the second door motor 1421 is driven while the door 133 for adjusting the discharge flow in the reverse direction is closed, the second transfer block 1423 linearly moves in the second transfer screw 1422 and at the same time the second synchro ring 1424 ) moves backward, and all the reverse discharge flow control doors 133 hinged to the second synchro ring 1424 are opened at the same time as shown in FIG. Toxic gas) emissions (Q2) can be increased.

So far, the present invention has been described in detail with reference to the presented embodiments, but those skilled in the art can make various modifications and variations without departing from the technical spirit of the present invention with reference to the presented embodiments. will be. The present invention is not limited by these variations and modifications, but is limited only by the claims appended below.

12: blower
121: blowing casing
123: blowing motor
124: wing hub
125: wing support
126: axial flow wing
131: casing for adjusting discharge flow
132: Door for adjusting the discharge flow rate in the forward direction
133: door for adjusting the discharge flow rate in the reverse direction
141,142: first and second door operating means

Claims (7)

delete delete delete a blowing casing 121 having a suction port 121a at one end and a discharge port 121b at the other end;
a blower motor 123 supported and installed on the central axis of the blower casing 121;
a wing hub 124 fitted to the rotation shaft of the blower motor 123;
a wing support 125 mounted on the wing hub 124 and having a plurality of wing joining plates 125a formed at regular intervals;
It has a plate-shaped axial flow type wing 126 fixed to the wing support 125,
The blade joining plate 125a is tilted at the same offset angle θ with respect to the rotation axis center line X of the blower motor 123 in order to generate the same discharge air volume of the axial flow type blade 126 during forward and reverse rotation. there is,
In the blower casing 121, a forward direction area D is partitioned toward the discharge port 121b based on a vertical reference line Y passing through the center of the wing support 125, and a suction port 121a around the forward direction area D. ) side, and the long hole 1211 for forward inflow increase, which penetrates in a shape that becomes larger on the side and smaller on the discharge port 121b side, is arranged in the circumferential and axial directions so that the forward air flow rate Q1 increases,
In order to adjust the discharge flow rate of the blowing casing 121 when the blowing motor 123 rotates in the reverse direction,
It is installed concentrically on the outside of the blowing casing 121 to form a second suction passage 131a between the blowing casing 121 and the second positive inlet 131b circularly arranged around the outer circumferential surface and the second suction passage 131b. a casing 131 for adjusting the discharge flow rate having a reverse inlet port 131c;
a forward discharge flow rate adjusting door 132 hinged to the discharge flow rate adjusting casing 131 to open and close the second forward inlet port 131b;
a reverse discharge flow rate adjusting door 133 hinged to the discharge flow rate adjusting casing 131 to open and close the second reverse inlet port 131c;
Blowing device for forward/reverse rotation, characterized in that it includes first and second door operating means (141, 142) for rotating and operating the door (132) for adjusting the discharge flow rate in the forward direction and the door (133) for adjusting the discharge flow rate in the reverse direction, respectively. According to claim 4,
The first door operating means 141 is
a first door motor 1411 fixedly installed on the side of the casing 131 for adjusting the discharge flow rate;
a first transfer screw 1412 directly connected to the rotation shaft of the first door motor 1411;
a transfer block 1413 that is screwed to the first transfer screw 1412 and moves linearly;
a synchro ring 1414 coaxially inserted outside the casing 131 for adjusting the discharge flow rate and hingedly connected to the transfer block 1413;
One end is hinged to the synchro ring 1414 and the other end is hinged to the door 132 for adjusting the discharge flow rate in the forward direction to open and close the door 132 for adjusting the discharge flow rate in the forward direction according to the rotation direction of the first door motor 1411. A blower for forward/reverse rotation, characterized in that it includes a door lever (1415). According to claim 4,
The second door operating means 142 is
a second door motor 1421 fixedly installed on the side of the casing 131 for adjusting the discharge flow rate;
a second transfer screw 1422 directly connected to the rotation shaft of the second door motor 1421;
a second transfer block 1423 that is screwed to the second transfer screw 1422 and linearly moves;
a second synchro ring 1424 coaxially inserted outside the casing 131 for adjusting the discharge flow rate and hingedly connected to the second transfer block 1423;
One end is hinged to the second synchro ring 1424 and the other end is hinged to the forward discharge flow control door 132 to open and close the reverse discharge flow control door 133 according to the rotation direction of the second door motor 1421 A blower for forward/reverse rotation, characterized in that it includes a second door lever (1425). delete

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