KR101065855B1 - Fan - Google Patents

Abstract

According to an embodiment of the present invention, a blower including a fan housing having a blade and expanding or contracting with a temperature and a gap adjusting portion for adjusting a gap between a blade tip and an inner surface of the fan housing according to a temperature are disclosed. do. The gap control unit maintains a constant gap between the blade tip and the inner surface of the fan housing regardless of the temperature blown into the blower, so that the gap between the blade and the inner surface of the fan housing is small, so that the blade is broken or the gap is too large, increasing the gap loss. The blowing efficiency can be prevented from being lowered.

Blade, Tip, Gap, Adjustable

Description

Blower {FAN}

The present invention relates to a fan having a fan having a plurality of blades and a fan housing for accommodating the fan. More specifically, the gap between the fan housing inner surface and the blade tip can be adjusted according to the temperature of the air blown by the fan. It is about the blower.

Blowers are used in underground spaces and tunnels because they can circulate the internal air, including a rotatable blade.

The blower may comprise a fan with blades and a fan housing for receiving the fan. In addition, the blower may have a predetermined gap formed between the blade tip and the inner surface of the fan housing for smooth driving.

In other words, since the fan with the blade rotates to circulate the air in the underground space or tunnel, the blade tip rotates to prevent the blade from being damaged by hitting the inner surface of the fan housing and to increase the flow efficiency. , End) and the inner surface of the fan housing can be formed.

In general, since the blower operates at room temperature, a gap between the fan housing inner surface and the blade tip can be maintained. However, when the temperature of the air blown by the fan rises, such as a fire, the gap between the blade tip and the inner surface of the fan housing may be narrowed because the blade may expand due to heat.

If the gap between the blade tip and the fan housing inner surface becomes narrow in the event of a fire, the blade tip may not rub smoothly due to friction with the fan housing inner surface, or the gap may be narrowed, and thus the flow rate of the designed air may not be transferred, resulting in a loss of flow. It may occur, and eventually the smoke generated during the fire may not be quickly discharged to the outside of the tunnel.

On the other hand, the gap between the blade tip and the inner surface of the fan housing is large to make the blade run smoothly. However, a large tip clearance can reduce the efficiency of the blower due to the increased amount of air that escapes between the blade tip and the inner surface of the fan housing under normal circumstances.

One embodiment of the present invention, according to the temperature provides a blower that can adjust the gap between the blade tip of the fan and the inner surface of the fan housing for receiving the blade formed fan.

In addition, an embodiment of the present invention provides a blower that can reduce flow loss by maintaining a gap between the blade tip and the inner surface of the fan housing during normal operation.

In addition, an embodiment of the present invention provides a blower capable of sufficiently securing a gap between the blade tip and the inner surface of the fan housing in an emergency such as a fire.

Blower according to an embodiment of the present invention is a fan having a plurality of blades; And a fan housing accommodated therein and spaced apart from the tip of the blade, wherein the fan housing is disposed between an inner surface of the fan housing and the blade tip according to a temperature of air blown by the fan. A gap controller may be formed to control the gap of the gap.

By configuring as described above, the blade can be smoothly driven even in an emergency by adjusting between the fan housing inner surface and the blade team according to the temperature change.

The gap adjusting part may include a variable member receiving part formed outside the fan housing to accommodate the variable member and the variable member provided on the outer circumferential surface of the fan housing. The variable member may use a member whose size or volume may change with temperature, and the blade may increase or decrease in width or volume with temperature change. At this time, the size or volume of the variable member changes according to the temperature change, so that the gap between the blade tip and the inner surface of the fan housing may be maintained by increasing or decreasing the blade.

The variable member accommodating part may include both ends bent toward the outside of the fan housing, and a side of the gap adjusting part facing the variable part formed between the both ends may have a variable opening. When the size of the opening is formed to be variable, the width of the opening may be varied according to a change in size or volume of the variable member due to temperature change.

On the other hand, the variable member receiving portion may be bent toward the outside of the fan housing, one side facing the opening formed in the gap adjusting portion may be covered. Since the variable member receiving portion covers and accommodates the variable member, it is easy to support and fix the variable member to the gap adjusting portion.

A buffered portion may be formed at the covered side of the variable member accommodating portion so that the size of the opening of the gap adjusting portion may vary. The buffer part may change the size or width of the opening of the gap adjusting part as the size or volume of the variable member changes.

On the other hand, the buffer portion may be formed at the corner of the one side of the variable member receiving portion, it may be formed to protrude toward the outside of the fan housing. When the variable member is variable, the edge of the variable member may be expanded or contracted, and the buffer part may be referred to as a free space according to the expansion or reduction of the variable member.

The variable member may be formed of a material that expands or contracts according to the temperature of the air blown by the fan. In this way, by forming the variable member made of a material that expands or contracts according to the temperature, it is possible to expand or contract the gap adjusting part according to the temperature inside the fan housing. As a result, the gap between the tip of the blade and the fan gap adjusting portion whose size or volume changes with temperature inside the fan housing can be maintained at a constant interval.

Meanwhile, the gap adjusting part may be formed only in a portion of the fan housing corresponding to the thickness of the hub to which the blade is connected. The gap adjuster formed as described above may correspond to blade width or volume increase or decrease according to a temperature inside the fan housing. In other words, it is possible to increase or decrease the width or size of the gap adjuster according to the blade width or volume increase, thereby preventing the fan housing and the blade tip from colliding with each other.

In addition, a plurality of variable member accommodating parts may be provided along the circumferential direction of the gap adjusting part. By increasing the number of the variable member accommodating portion as described above, the gap adjusting portion can be smoothly expanded or contracted.

On the other hand, according to the blower according to an embodiment of the present invention, a fan having a plurality of blades; And a fan housing accommodated therein and spaced apart from the tip of the blade, wherein the fan housing adjusts the opening and the size of the opening depending on the temperature of the air blown by the fan. The gap control unit may be formed.

The gap adjusting part may include a variable member that expands or contracts according to the temperature of the air blown by the fan, and the size of the opening may be adjusted in conjunction with the expansion or contraction of the variable member. By adjusting the size of the opening as described above, the gap size between the tip region of the blade and the gap adjusting portion, which is changed in size depending on the temperature inside the blower, may be maintained.

The gap adjustment part is formed only in a portion of the fan housing corresponding to the thickness of the hub to which the blade is connected, so that the gap adjustment part can be easily expanded or contracted according to the expansion or contraction of the blade.

The blower according to an embodiment of the present invention provides a variable member capable of expanding or contracting according to a temperature, so that when the blade expands or contracts according to temperature change, the variable member also expands or contracts between the fan housing inner surface and the blade tip. It allows the gap formed to be maintained.

In addition, the blower according to an embodiment of the present invention is to expand or contract the variable member according to the temperature to maintain a gap between the blade tip and the inner surface of the fan housing can smoothly flow air in the blower. As a result, it is possible to reduce the flow efficiency of the blower by maximizing the flow of air flowing through the blower inner passage.

In addition, since the blower according to the embodiment of the present invention expands or contracts only in an emergency, the gap between the fan housing and the blade tip may be optimally maintained regardless of the emergency and emergency.

Hereinafter, with reference to the accompanying drawings will be described in detail with respect to the configuration and operation according to an embodiment of the present invention. The following description is one of several aspects of the patentable invention and the following description forms part of the detailed description of the invention. In the following description, well-known functions or constructions are not described in detail for the sake of clarity and conciseness.

1 is a view schematically showing a blower according to an embodiment of the present invention, FIG. 2 is a cross-sectional view taken along the cutting line I-I of FIG. 1, and FIG. 3 is a cross-sectional view taken along the cutting line II-II of FIG. to be.

Referring to Figure 1, the blower 100 according to an embodiment of the present invention is accommodated in the fan 120, a fan 120 having a plurality of blades 124 and spaced apart from the tip of the blade 124 It may include a fan housing 180 provided.

The blower 100 allows the internal air to circulate in a space such as an underground space, a tunnel, etc., and in some cases, may play an important role of circulating fire heat and external air in an emergency such as a fire.

In the fan housing 180, a fan 120 having a plurality of blades 124 may be provided, and a motor (not shown) for supplying power to the rotation of the blades 124 and a rotation shaft of the blades 124. (Not shown) and the like, and a filter for filtering dust in the air introduced through the fan housing 180 may be provided.

In addition, the fan housing 180 is provided with a hub 122 that can support and secure the blade 124. The hub 122 is mounted on the rotating shaft connected to the motor, and the blade 124 rotates when the rotating shaft rotates. The hub 122 may be generally formed in a circular shape, and a plurality of blades 124 may be provided along the circumference of the hub 122.

In addition, the fan housing 180 includes a gap adjusting unit 140 for adjusting a gap between the inner surface of the fan housing 180 and the tip 126 of the blade 124 according to the temperature of the air blown by the fan 120. Can be formed.

That is, a predetermined gap may be formed between the tip of the blade 124 and the inner surface of the fan housing 180. The gap may prevent the blade 124 from being damaged by colliding or rubbing the blade 124 tip and the inner surface of the fan housing 180 when the blade 124 rotates in the fan housing 180.

Since the fan 120 is normally operated at room temperature in a normal state, the gap between the blade 124 tip and the inner surface of the fan housing 180 may vary in size, length and width of the blade 124 at room temperature, and the fan housing ( 180) may be formed in consideration of the shape, diameter, and the like.

Here, when an emergency situation such as a fire occurs in a space such as a tunnel in which the blower 100 is installed, the temperature of the space in which the blower 100 is installed, such as the inside of the tunnel, may increase, and at this time, The length, size and width can be thermally expanded by the elevated temperature. When the length, size, or width of the blade 124 is expanded by heat, the gap between the inner surface of the fan housing 180 and the tip of the blade 124 may be narrowed. As a result, the tip of the blade 124 may become a fan housing ( The fan 120 may become difficult to operate smoothly, such as friction with the inner surface of the 180.

In this case, the gap adjusting unit 140 may enlarge the diameter of the fan housing 180 to correspond to the length, size, or width of the expanded blade 124, and the like by the operation of the gap adjusting unit 140. 124 The gap between the tip and fan housing 180 can be adjusted.

Hereinafter, a part of the fan housing 180 is also expanded or contracted in response to the expansion or contraction of the blade 124 as the temperature rises, thereby keeping the gap between the blade 124 tip and the inner surface of the fan housing 180 as constant as possible. This will be described in detail with respect to the fan housing 180.

Referring to FIG. 2, the fan housing 180 adjusts the gap G between the inner surface of the fan housing 180 and the tip 126 of the blade 124 according to the temperature of the air blown by the fan 120. The gap adjusting unit 140 may be formed.

The gap adjusting part 140 may include a variable member accommodating part 160 formed on an outer circumferential surface of the fan housing 180 to accommodate the variable member 150 and the variable member 150.

The variable member accommodating part 160 may include a variable part 170 which is bent toward the outside of the fan housing 180, and has an opening 148 in the fan housing 180 facing the variable part 170. Can be formed. Here, the variable part 170 may also be formed as an opening.

That is, the upper side of the variable member accommodating part 160 may be opened to expose the upper surface of the variable member 150 to the outside. In addition, both ends of the variable member receiving unit 160 may be bent in the corner direction of the variable member 150 to prevent the variable member 150 from being separated from the variable member receiving unit 160.

In addition, an opening 148 may be formed in the fan housing 180 or the gap adjusting part 140 facing the opened upper side of the variable member accommodating part 160. The opening 148 refers to a gap formed between the end of the fan housing 180 or the gap adjusting unit 140. In one embodiment of the present invention, the left end of the gap adjusting unit 140 is the gap adjusting unit 140. Positioned above the right end of the end of the fan housing 180 will be described with an example formed to overlap each other.

In addition, in the exemplary embodiment of the present invention, the fan housing 180 is formed in a circular shape so that the gap adjusting part 140 is formed along the circumferential direction according to the fan housing 180. In addition, the variable member accommodating part 160 may be formed in plural along the circumferential direction of the gap adjusting part 140 or the fan housing 180, but in one embodiment of the present invention, the variable member accommodating part is provided for convenience of description. One case where one 160 is formed and one opening 148 formed in the fan housing 180 is also taken as an example.

The left end of the gap adjusting unit 140 may be located above the right end of the gap adjusting unit 140, and at this time, the left end of the gap adjusting unit 140 may be bent to the right end of the gap adjusting unit 140. ) May be formed. In this case, the opening 148 may be a predetermined space formed between the bent portion 142 and the right end portion. The space may expand or contract according to the temperature of air flowing through the inside of the fan housing 180, and the size or width of the gap adjuster 140 may change due to the expansion or contraction of the space.

Meanwhile, the gap adjusting part 140 may further include a bent surface 144 extending in the right end direction from the bent portion 142 so as to support the lower portion of the variable member 150. The bent surface 144 prevents the variable member 150 from being separated from the variable member receiving unit 160.

The variable member 150 may be made of a material having a good thermal expansion rate that may expand or contract according to a change in temperature of air flowing in the fan housing 180. When the variable member 150 expands or contracts according to temperature, the size or width of the gap adjusting unit 140 may expand or contract due to a change in shape or volume of the variable member 150.

Meanwhile, referring to FIG. 3, the gap adjusting unit 140 may be formed in a thickness portion corresponding to the blade 124 in the overall thickness direction of the fan housing 180.

As described above, a gap G may be formed between the inner surface of the fan housing 180 and the tip 126 of the blade 124. However, when the air temperature of the space in which the blower 100 is mounted increases, the blade 124 may expand, and thus, the blade 124 tip 126 and the inner surface of the fan housing 180 may collide with each other to prevent air. Difficulty in circulation may occur, and in some cases, the blade 124 may be damaged.

In this case, the gap between the inner surface of the fan housing 180 and the blade 124 may be constant by expanding the width or volume of the fan housing 180 using the gap adjusting unit 140. As such, the gap adjusting unit 140 may be formed at a position corresponding to the blade 124 so as to adjust a gap between the inner surface of the fan housing 180 and the blade 124.

In addition, as described above, the hub 122 in which the blade 124 is mounted may be provided inside the fan housing 180, and a plurality of blades 124 may be provided along the outer circumferential surface of the hub 122. In addition, the fan housing 180 may be provided with a motor (M) for supplying power to the rotation of the blade 124 and the rotation axis (D) according to the rotation of the blade (124).

Referring back to FIG. 2, the upper portion of the variable member 150 may be exposed to the outside by the variable portion 170, and the lower portion may maintain a state supported by the support surface 146. In this case, an opening 148 may be formed between the bent portion 142 and the right end of the gap adjusting portion 140. In addition, a gap G is formed between the blade 124 tip 126 and the inner surface of the gap adjusting part 140 so that the blade 124 tip 126 and the fan housing 180 of the blade 124 rotate when the blade 124 rotates. The inner surface of the blade 124 may be prevented from being damaged, and the air flows smoothly by forming a space in which air flows in the blower 100.

At this time, when the air temperature in the blower 100 rises, the blade 124 and the variable member 150 may expand. The variable member 150 may expand in left / right and front / rear directions, and when the variable member 150 expands, both ends of the gap control unit 140 may be pushed left and right to expand the opening 148. . As the opening 148 is expanded, the gap G between the blade 124 tip 126 and the inner surface of the gap adjusting part 140 may be maintained, so that the blade 124 may rotate smoothly.

4 is a diagram schematically illustrating a blower according to another exemplary embodiment of the present invention, and FIG. 5 is a cross-sectional view taken along line III-III of FIG. 4.

Before describing the drawings, detailed descriptions of the same or equivalent components as those described above will be omitted.

4 and 5, the fan housing 180 may have a gap adjusting part 240 formed therein, and the gap adjusting part 240 may be bent toward the outside of the fan housing 180 and may have a gap adjusting part ( One side facing the 240 may include a variable member receiving portion 260 is covered.

The variable member accommodating part 260 may accommodate the variable member 150 without a portion of which the upper part facing the outside of the fan housing 180 is covered (that is, covered) without the variable member 150 being exposed to the outside. In this case, buffer parts 262a and 262b may be formed on the variable member accommodating part 260 to facilitate expansion or contraction of the variable member accommodating part 260 according to expansion or contraction of the variable member 150.

The buffer parts 262a and 262b may be formed at an upper edge of the variable member accommodating part 260 and may protrude toward the outside of the fan housing 180. The buffer parts 262a and 262b provide a free space so that the gap adjusting part 240 can be expanded according to the width or volume of the expanded variable member 150 when the variable member 150 is expanded.

That is, as described above, when the air temperature inside the blower 100 rises, the blade 124 may expand, and the blade tip 126 may collide with the inner surface of the gap adjuster 240 to damage the blade 124. The air flow in the blower 100 may not be smooth.

In this case, the width or size of the gap control unit 240 may be expanded or contracted by providing the variable member 150 that may expand or contract according to the air temperature change. For example, when the temperature in the blower 100 rises and the variable member 150 expands, the gap adjusting part 240 may expand left and right. In this case, the buffer parts 262a and 262b may be opened in a direction corresponding to the direction in which the gap adjusting part 240 extends, and the width or size of the gap adjusting part 240 is equal to the width of the buffer parts 262a and 262b. May be enlarged to maintain a gap G between the blade 124 tip 126 and the inner surface of the gap adjusting part 240.

On the other hand, the end of the gap adjusting unit 240 and the other end is not connected can be formed a variable interval. That is, an opening 248 is formed between the left end and the right end of the gap adjusting part 240 so that when the variable member 150 expands or contracts, its size may be widened or reduced, and the widened or reduced size is It may be referred to as the gap G between the tip 126 of the blade 124 and the inner surface of the gap adjusting part 240.

In addition, the gap adjusting part 240 may further include a support part 242 supporting and accommodating a lower portion of the variable member 150, and the support part 242 extends toward the other end of the gap adjusting part 240. Can support the lower portion of the variable member 150

The variable member 150 is provided outside the fan housing 180 to maintain a gap formed between the blade 124 which is expanded or contracted by the temperature change in the blower 100 and the inner surface of the fan housing 180 as described above. In addition, the gap adjusting part 240 in which the variable member 150 is mounted is enlarged or reduced in the same direction as the expansion or contraction direction of the variable member 150 so that the blade 124 tip 126 and the inner surface of the fan housing 180 are extended. The gap G between them can be maintained.

Although the preferred embodiments of the present invention have been described above by way of example, the scope of the present invention is not limited to these specific embodiments, and may be appropriately changed within the scope described in the claims.

1 is a view schematically showing a blower according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view taken along the line II of FIG. 1.

3 is a cross-sectional view taken along the line II-II of FIG. 1.

4 is a view schematically showing a blower according to another embodiment of the present invention.

FIG. 5 is a cross-sectional view taken along line III-III of FIG. 4.

<Explanation of symbols for the main parts of the drawings>

100: blower 120: fan

140: gap adjustment unit 150: variable member

160: variable member receiving portion 180: fan housing

Claims (12)

A fan having a plurality of blades; And And a fan housing accommodated therein and spaced apart from a tip of the blade. The blade tip corresponding side of the fan housing has a length varying in the circumferential direction according to the temperature of the air blown by the fan to adjust a diameter of the fan housing to adjust a gap between the inner surface of the fan housing and the blade tip. The adjustment part is formed, The gap adjusting unit, A variable member provided on an outer circumferential surface of the blade tip corresponding side of the fan housing to vary in length in the circumferential direction; A variable member accommodating part formed outside the fan housing to accommodate the variable member Blower comprising a. delete The method of claim 1, The variable member accommodating part includes both ends bent toward the outside of the fan housing, and one side of the gap adjusting part facing the variable part formed between the both ends is provided with a variable opening. The method of claim 1, The variable member accommodating part is bent toward the outside of the fan housing, and one side facing the opening formed in the gap adjusting part is covered, the blower. 5. The method of claim 4, The blower of the variable member accommodating portion is provided with a buffer portion to vary the size of the opening of the gap adjusting portion. The method of claim 5, The shock absorber is formed at the edge of the one side of the variable member receiving portion, the blower protruding toward the outside of the fan housing. The method according to any one of claims 1 and 3 to 6, The variable member is a blower formed of a material that expands or contracts according to the temperature of the air blown by the fan. The method of claim 7, wherein And the gap adjusting part is formed only in a portion of the fan housing corresponding to the thickness of the hub to which the blade is connected. The method of claim 7, wherein Blower is provided with a plurality of the variable member receiving portion in the circumferential direction of the gap adjusting portion. A fan having a plurality of blades; And And a fan housing accommodated therein and spaced apart from a tip of the blade. The blade tip corresponding side of the fan housing is changed in length in the circumferential direction according to the temperature of the air blown by the fan to adjust the diameter of the fan housing and change the size of the opening set in the circumferential direction. The gap adjusting portion is formed to adjust, The gap adjusting unit, Variable member that expands or contracts in the circumferential direction at the corresponding outer peripheral surface of the blade tip in accordance with the temperature of the air blown by the fan Blower comprising a. delete The method of claim 10, And the gap adjusting part is formed only in a portion of the fan housing corresponding to the thickness of the hub to which the blade is connected.

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