KR101175887B1

KR101175887B1 - high temperature reversible axial fan for emergency ventilation

Info

Publication number: KR101175887B1
Application number: KR1020100139294A
Authority: KR
Inventors: 정철영; 고희환; 박창덕; 손성한; 이정근
Original assignee: 주식회사 귀뚜라미 범양냉방
Priority date: 2010-12-30
Filing date: 2010-12-30
Publication date: 2012-08-21
Also published as: KR20120077361A

Abstract

The present invention relates to a high temperature axial blower installed inside or outside a tunnel or in an independent space, comprising: a housing coupled to the inside and outside of the tunnel or in an independent space; A plurality of blades rotatably provided in the housing; A blade tip coupled to an end region of the blade to close a gap between the blade and the housing, wherein the blade tip melts when exposed to a high temperature above a reference temperature, even though the blade is thermally expanded by a high temperature. Characterized in that the material is provided to maintain the gap between the housing.

Description

High temperature reversible axial blower for emergency ventilation {HIGH TEMPERATURE REVERSIBLE AXIAL FAN FOR EMERGENCY VENTILATION}

The present invention relates to an axial blower, and more particularly, to a blower that is installed inside or outside a tunnel or in an independent space and can be stably used even in the event of a fire.

Ventilation ducts or structural flow paths are formed in the narrow spaces and underground spaces, such as tunnels, to keep the air quality fresh. A blower for drawing inside the tunnel is provided.

In the case of a blower used in such a tunnel and an underground space, a structural requirement for rapidly discharging toxic gas and high temperature heat generated in a fire due to a vehicle accident or a fire due to other causes is required.

In general, such a high temperature reversible blower blows fresh air into the underground space during normal times, and operates in reverse in case of emergency (for reasons of fire or smoke) to discharge harmful substances inside.

Therefore, in normal forward operation, high efficiency is required to reduce operating costs, and it must have a high reverse air volume ratio in response to an emergency situation.

1 is a schematic diagram schematically showing the structure of a general blower 10. As shown, a typical blower 10 includes a housing 11 and a plurality of blades 13 rotating inside the housing 11.

Here, the housing 11 and the blade 13 are provided to rotate while maintaining a predetermined gap (d) as shown in FIG. The gap d is for preventing contact with the wall surface of the housing 11 when the metal blade 13 is thermally expanded as the temperature rises.

In addition, the gap d is provided for ease of assembly during product production or to prevent the blade 13 from being broken or generating noise due to contact with the housing 11 during operation.

However, when the gap d is large, the rotation is smooth and the assembly is improved during mass production, and the precision of the product manufacturing is low, so that the cost of the product can be lowered, while the reflow of the working fluid between the gaps d is reduced. There is a problem that the efficiency of the product is lowered and the noise is greater.

Accordingly, in the case of a normal room temperature blower, the precision cast product maintains a gap of about 1 mm and a sheet metal work blower of about 2 mm to 10 mm. However, in the case of a blower used in a tunnel, the gap should be maintained about 1.5 to 3 times wider than the gap of a general blower in preparation for thermal expansion of metal when exposed to high temperatures during a fire. Accordingly, there is a disadvantage in that the efficiency of the high temperature blower used in the tunnel is lower than that of the normal room temperature blower.

SUMMARY OF THE INVENTION An object of the present invention is to provide an axial blower for emergency ventilation which can compensate for the thermal expansion of a blade by improving the efficiency by narrowing the gap and increasing the gap at high temperatures.

One aspect of the present invention for achieving the above technical problem relates to a high temperature axial flow blower installed in or outside the tunnel or an independent space. The axial blower of the present invention includes a housing coupled to the tunnel wall surface; A plurality of blades rotatably provided in the housing; A blade tip coupled to an end region of the blade to close a gap between the blade and the housing, wherein the blade tip melts when exposed to a high temperature above a reference temperature, even though the blade is thermally expanded by a high temperature. It is provided with a material to maintain the gap between the housing.

According to one embodiment, the blade tip may be provided with any one of a thermoplastic resin or wax and a low temperature molten metal that is melted at a predetermined reference temperature.

On the other hand, the object of the present invention can be achieved by an axial blower installed in or outside the tunnel or in an independent space. An axial blower according to the present invention includes a housing coupled to the tunnel wall surface; A plurality of blades rotatably provided in the housing; An extension housing extending radially outwardly on one side of the housing to widen the gap of the blade end region; and a charge filled in the space between the housing and the extension housing and melted when exposed to a high temperature above a predetermined reference temperature. It includes a molten member to maintain the gap between the blade and the extended housing even if the blade is thermally expanded by.

According to one embodiment, the melting member may be provided with any one of a thermoplastic resin or wax and a low temperature molten metal that is melted at a predetermined reference temperature.

According to the present invention, it is possible to provide an axial flow blower for a tunnel that can compensate for thermal expansion of a blade by increasing the efficiency by narrowing the gap at ordinary times and widening the gap at high temperatures.

1 is a perspective view showing the configuration of a general blower,
2 is an exemplary view showing a gap between a blade and a housing of a general blower;
Figure 3 is a schematic diagram showing the configuration of the blower according to the first embodiment of the present invention and the change of the gap during fire,
4 is a schematic diagram showing the configuration of a blower according to a second embodiment of the present invention.

In order to fully understand the present invention, preferred embodiments of the present invention will be described with reference to the accompanying drawings. The embodiments of the present invention may be modified into various forms, and the scope of the present invention should not be construed as being limited to the embodiments described in detail below. This embodiment is provided to more completely explain the present invention to those skilled in the art. Therefore, the shapes and the like of the elements in the drawings can be exaggeratedly expressed to emphasize a clearer description. It should be noted that in the drawings, the same members are denoted by the same reference numerals. Detailed descriptions of well-known functions and constructions which may be unnecessarily obscured by the gist of the present invention are omitted.

Figure 3 is a schematic diagram showing a cross-sectional configuration of the axial blower 100 according to the present invention. As shown, the axial blower 100 according to the present invention is coupled to the housing 110, the blade 120 rotates inside the housing 110, and the blade 120 is melted by the high temperature blades Tip 130.

The axial flow blower 100 according to the present invention is installed in the interior or exterior of the tunnel or in an independent space to allow fresh air to flow into the interior in normal times, and discharge smoke or high temperature internal air to the outside in case of a fire. To cleanse the air.

The housing 110 is installed inside or outside the tunnel or in an independent space to support the position of the axial blower 100. A plurality of blades 120 are disposed radially inside the housing 110 to rotate about a rotation axis (not shown). The blade 120 is provided with a metal material so that it can be stably operated even at a high temperature. A rotating shaft (not shown) of the blade 120 is connected to and driven by a driving source (not shown).

Blade tip 130 is coupled to the end of the blade 120 is usually improved the operating efficiency by minimizing the gap between the blade 120 and the housing 110, in the event of fire is melted by heat in the blade 120 and The gap between the housings 110 can be maintained.

Blade tip 130 is provided with a material that is easily melted when exposed to high temperatures. Accordingly, the low temperature state is coupled to the end of the blade 120 to minimize the gap between the blade 120 and the housing 110 to increase the efficiency. To this end, the blade tip 130 may be provided with any one of a thermoplastic resin, a wax or a low temperature molten metal that is melted at a predetermined reference temperature, specifically, 70 ℃ ~ 150 ℃.

As shown in the upper region of FIG. 3, a blade tip 130 having a width A is coupled to the blade 120 so that the gap between the housing 110 and the blade tip 130 is minimized to L1. The gap between the blade 120 and the housing 110 is reduced by the width of the blade tip 130 when compared with the case without the blade tip 130. Accordingly, the back flow of the working fluid is reduced to minimize noise and increase the blowing efficiency. As the blowing efficiency increases, power consumption can also be saved.

On the other hand, the blade tip 130 is melted at a predetermined reference temperature when exposed to the flame (F) as shown in the lower region of FIG. At this time, the blade 120 of the metal material is thermally expanded by the high temperature so that the total length is extended by a. The gap between the blade 120 and the housing 110 is widened to L2 due to the melting of the blade tip 130, so that even when the blade 120 is extended, the risk of contact or collision with the housing 110 is prevented, so that it is stable even when a fire occurs. Can be driven.

Here, the width of the blade tip 130 is preferably provided to minimize the gap in consideration of the thermal expansion coefficient of the metal material forming the blade 120.

On the other hand, Figure 4 is a schematic diagram showing the side configuration of the axial blower 100a according to the second embodiment of the present invention. While the axial blower 100 according to the preferred embodiment of the present invention described above adjusts the gap by coupling the blade tip 130 to the end of the blade 120, the axial blower according to the second embodiment of the present invention. 100a adjusts the gap by coupling the melting member 150 to the housing 110.

To this end, the axial blower 100a according to the second exemplary embodiment of the present invention includes an extension housing 110 extending radially outward in an area corresponding to the blade 120 in the area of the housing 110. . That is, the housing 110 includes an extended housing 110 region in which only a diameter corresponding to the blade 120 is radially outwardly provided.

In addition, the gap between the blade 120 and the extension housing 110 is minimized by filling the melting member 150 in the expansion space between the extension housing 110 and the housing 110. That is, since the melting member 150 is filled to the inner wall surface of the housing 110, the gap of the blade 120 is minimized and provided between the melting members 150.

Melting member 150 is provided with a material that is easily melted when exposed to high temperatures. The melting member 150 may be provided with any one of a thermoplastic resin, a wax, or a low temperature molten metal melted at a predetermined reference temperature.

On the other hand, in the event of a fire, the molten member 150 exposed to high temperature is melted so that the gap between the blade 120 and the extended housing 110 has a diameter d in which the extended housing 110 is extended compared to the housing 110. Will increase by. Therefore, even if the blade 120 is thermally expanded by the high temperature to extend its length, the gap is increased, thereby preventing the blade 120 from contacting or colliding with the inner wall surface of the extended housing 110. Accordingly, even when a fire occurs, the axial blower 100a may be stably driven.

As described above, the axial blower according to the present invention combines a molten member that is melted by a high temperature to a blade or a housing, thereby minimizing the gap in a low temperature state, thereby increasing the blowing efficiency, and melting in the event of a fire, thereby widening the gap, so that the blade Even stretching by thermal expansion can prevent the risk of contact or collision with the housing.

Therefore, even if a fire occurs, the axial blower can be driven stably without failure.

Embodiment of the axial blower for the tunnel of the present invention described above is merely illustrative, and those skilled in the art to which the present invention pertains that various modifications and equivalent other embodiments are possible. You can see well. Therefore, it is to be understood that the present invention is not limited to the above-described embodiments. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims. It is also to be understood that the invention includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the appended claims.

100: blower
110: housing
120: blade
130: blade tip
140: extended housing
150: melting member

Claims

In the axial blower installed inside or outside the tunnel or in a separate space,
A housing coupled to the interior or exterior of the tunnel or to an independent space;
A plurality of blades rotatably provided in the housing;
A blade tip coupled to an end region of the blade to narrow a gap between the blade and the housing,
The blade tip is made of a material that is melted when exposed to a high temperature higher than the reference temperature to maintain the gap between the blade and the housing even if the blade is thermally expanded due to high temperature, emergency reversible axial flow blower for emergency ventilation .

The method of claim 1,
The blade tip is a high-temperature reversible axial blower for emergency ventilation, characterized in that it is provided with any one selected from the group consisting of a thermoplastic resin, a wax and a low temperature molten metal that is melted at 70 ℃ ~ 150 ℃.

In the axial blower installed inside or outside the tunnel or in a separate space,
A housing coupled to the interior or exterior of the tunnel or to an independent space;
A plurality of blades rotatably provided in the housing;
An extension housing extending radially outwardly on one side of the housing to widen the gap of the blade end region;
And a melting member filled in the space between the housing and the extended housing and melted when exposed to a high temperature above a reference temperature so that the gap between the blade and the extended housing is maintained even when the blade is thermally expanded by a high temperature. High temperature reversible axial blower for emergency ventilation.

The method of claim 3,
The melting member is a high temperature reversible axial blower for emergency ventilation, characterized in that it is provided with any one selected from the group consisting of a thermoplastic resin, a wax and a low temperature molten metal that is melted at 70 ℃ ~ 150 ℃.