WO2022149787A1

WO2022149787A1 - Fire prevention damper for exhaust duct

Info

Publication number: WO2022149787A1
Application number: PCT/KR2021/020027
Authority: WO
Inventors: 고의환; 고재환
Original assignee: 고의환; 고재환
Priority date: 2021-01-05
Filing date: 2021-12-28
Publication date: 2022-07-14
Also published as: KR102509163B1; KR20220098879A

Abstract

The present invention relates to a fire prevention damper for an exhaust duct and, more specifically, to a fire prevention damper for an exhaust duct, wherein the fire prevention damper is installed in an exhaust duct inside a building and can prevent the spread of flames and toxic gas in the event of a fire. The fire prevention damper for an exhaust duct according to the present invention is a fire prevention damper which is installed in an exhaust duct (D) inside a building so as to prevent the spread of flames and toxic gas, the fire prevention duct being characterized by comprising: a body (100) which is open at the front and rear and has a passage formed therein; an opening/closing means (200) which is formed as a dual structure consisting of sections respectively disposed at the front and rear of the inside of the body (100), and includes a plurality of rotary shafts (210) rotatably installed inside the body (100) and a plurality of blades (220) respectively coupled to the rotary shafts (210) and opening and closing the passage of the body (100); a link means (300) which includes fixed brackets (310) respectively fixed to the blades (220) and link members (320) link-coupled to the fixed brackets (310) and interlocking the blades (220); fixed fuses (400) which are connected between the body (100) and the blades (220) and are broken by flames and heat from fire, thereby releasing the binding of the blades (220) that are in an open state; an elastic spring (500) which is connected between the inner bottom of the body (100) and the bottom surface of the lower blade (220) and provides an elastic force; and refractory fillers (600) that are in the form of sheet paper and attached to the top surfaces and the bottom surfaces of the blades (220), and that seal the damper passage by expanding in response to heat from flames and fire.

Description

Fire damper for exhaust duct

The present invention relates to a fire damper for an exhaust duct, and more particularly, to a fire damper for an exhaust duct that is installed in an exhaust duct in a building to prevent the spread of flames and toxic smoke in the event of a fire.

In general, an exhaust duct for ventilating indoor air is installed in a building as part of an air conditioning system, and a damper is installed in this exhaust duct to adjust the amount of air circulating indoors and outdoors as needed.

The exhaust duct is a very useful facility in terms of indoor and outdoor ventilation, but in case of a fire, it can be a passageway for flames and smoke to spread.

In recent years, fire dampers that normally maintain an open state to ventilate indoor and outdoor air, and switch to a closed state in case of a fire, are used to prevent flames and smoke from spreading to other places.

An example of such a technique is disclosed in Document 1 below.

In Patent Document 1 below, in the fire duct for blocking the movement of toxic gases and flames mounted on a duct of a building, a frame integrally fixed to the duct; a plurality of blades respectively fixed on a plurality of shafts arranged to be rotatable across the frame from the inside of the frame to open and close the inner space of the frame; A plurality of horizontal link members each integrally fixed to one end of the shafts from the outside of the frame, and a single vertical link rotatably connected to the ends of the horizontal link members to connect all of the horizontal link members integrally connecting link; A rotary shaft is connected to any one of the plurality of shafts, is rotatably mounted on the outside of the frame, and a lever protruding at a right angle from the rotary shaft is provided to rotate the shaft connected thereto through the rotary shaft by the rotation operation of the lever handle part; and a plurality of blade fixing fuses that connect the lowermost blade among the plurality of blades to the lower edge of the frame, melt in a temperature range of 103° C. or higher and fall out by the action of the spring, thereby allowing rotation of the blades and closing the damper. A number of fuses for fixing blades melt and fall off only in case of fire, including ;, and the closed state of the blade can be identified through an externally installed connection link. Disclosed is a fire damper characterized in that it is configured to be able to open the damper.

However, since the conventional technique as described above closes the damper with only the blade when a fire occurs, it simply blocks the passage in the form of a partition. There is a problem of spreading to other places.

An example of a technique for solving this problem is disclosed in Document 2 below.

The following Patent Document 2 discloses: a tube body configured to intermittently flow an airflow while rotating a rotating plate to open, close and rotate by a hinge on one side of a hollow tube having openings at both ends; A mesh network is inserted into the opening hole of the tube body, but a fireproof material is coated or applied on the grill surface or the wire rod surface of the mesh network to block all the penetrating mesh eyes while foaming and expanding when a fire occurs. Fire-resistant filling net to block the transfer; In the fire damper having a fire-resistance filling net composed of, the hollow tube of the tube body is formed with a margin for securing a foaming space that is slightly expanded compared to the duct diameter on the longitudinal line, so that a fire-resisting net of a large area compared to the diameter of the duct is inserted. Fireproof filling, characterized in that the air flow transfer is smooth and the foaming space of the fireproof filler is secured, and a steel wire support is inserted between the plurality of fireproof filling nets inserted into the foaming space secured free space. A fire damper having a mesh is disclosed.

However, the conventional technique as described above has a problem in that the exhaust efficiency is lowered because the flow of indoor air that is normally exhausted to the outside through the exhaust duct is hindered due to the structure in which the mesh network is installed inside the tube body.

The object of the present invention was devised to solve the above problems, and as the fireproof filler attached to the upper and lower surfaces of the blade expands in response to the heat caused by the flame, it completely fills the gap between the blades so that the flame and An object of the present invention is to provide a fire damper for an exhaust duct capable of preventing the spread of toxic smoke.

In addition, in the event of a fire, as the fireproof fillers attached to the upper and lower outer surfaces and both outer surfaces of the body expand in response to heat from the flame, they fill the gaps and seams between the exhaust duct and the damper, so that flames and toxic smoke are different spaces. An object of the present invention is to provide a fire damper for an exhaust duct that can prevent diffusion into the air.

In addition, the fireproof filler is manufactured to be attached to the upper and lower outer surfaces and both outer surfaces of the body in advance during the manufacturing process of the damper prior to construction, thereby preventing the spread of flames and toxic smoke in the event of a fire after construction. An object of the present invention is to provide a fire damper for an exhaust duct with excellent workability.

In order to achieve the above object, the fire damper for an exhaust duct according to the present invention is installed in the exhaust duct (D) in a building to prevent the spread of flames and toxic smoke. being the body 100; Opening/closing means 200 comprising a plurality of rotation shafts 210 rotatably installed inside the body 100 and a plurality of blades 220 respectively coupled to the rotation shafts 210 to open and close the passage of the body 100 . ); Link means 300 comprising a fixing bracket 310 fixed to each of the blades 220 and a link member 320 that is link-coupled to the fixing bracket 310 to interlock the blades 220 with each other; a fixed fuse 400 connected between the body 100 and the blade 220 to release the binding of the blade 220 in an open state while being cut by flame and heat; and an elastic spring 500 connected between the inner bottom of the body 100 and the bottom surface of the lower blade 220 to provide an elastic force.

In addition, the body 100 is composed of a combination of upper and lower plates and side plates provided on both sides of the upper and lower plates, and the front and rear ends of the upper and lower plates and the front and rear ends of the side plates are bent inwardly extending inward flanges 110 ) is characterized in that each is formed.

In addition, the body 100 is composed of a combination of an upper plate, a lower plate, and side plates provided on both sides of the upper and lower plates, and inner flanges 110 bent inward and extending inwardly are formed at front and rear ends of the upper and lower plates, respectively. And, the front and rear ends of the side plate are characterized in that each of the outer flanges 120 extending outwardly multi-stage bent are formed.

In addition, the body 100 is composed of an upper plate, a lower plate, and a combination of side plates provided on both sides of the upper plate and the lower plate, and the front end of the upper plate, the lower plate and the side plate has an outer flange 120 that is bent and extended to the outside in multiple stages. It is characterized in that each of the inner flanges 110 bent inwardly extending inwardly are formed at the rear ends of the upper plate, the lower plate, and the side plate.

In addition, the body 100 is composed of a combination of an upper plate, a lower plate, and side plates provided on both sides of the upper and lower plates, and the front and rear ends of the upper and lower plates and the front and rear ends of the side plates are external flanges ( 120) is characterized in that each is formed.

In addition, the body 100 is characterized in that it is formed in a cylindrical shape.

In addition, the opening and closing means 200 is characterized in that a plurality of vertically disposed inside the body (100).

In addition, the opening and closing means 200 is characterized in that it is composed of a double structure in which a plurality of vertically arranged front and rear inner front and rear of the body (100), respectively.

In addition, both ends of the rotating shaft 210 are respectively supported on both inner surfaces of the body 100 .

In addition, both ends of the rotating shaft 210 are characterized in that each protrudes toward both outer surfaces of the body 100 .

In addition, a plurality of reinforcing frames 130 are installed spaced apart from each other in the longitudinal direction of the body 100 in order to reinforce the structural strength of the body 100 on the upper inner surface and the lower inner surface of the body 100 .

In addition, it is characterized in that the fire resistant filler 600 in the form of sheet paper is attached to the upper and lower surfaces of the blade 220 to seal the damper passage as it expands in response to heat caused by flames and pyrotechnic heat.

In addition, the upper inner surface and the lower inner surface of the body 100 are characterized in that the fire resistant filler 600 in the form of sheet paper is respectively attached to seal the damper passage as it expands in response to heat caused by flames and pyrotechnic heat.

In addition, the fire resistant filler 600 in the form of sheet paper is attached to the outer surface of the upper and lower portions of the body 100 and the outer surfaces of both sides to seal the damper passage as it expands in response to heat caused by flames and fire heat, respectively. .

In addition, a plurality of fixing clips 700 are bound to the front and rear ends of the blade 220 to strengthen the fixing force of the fire resistant filler 600 attached to the upper and lower surfaces of the blade 220 .

As described above, the fire damper for an exhaust duct according to the present invention completely fills the gap between the blades as the fireproof filler attached to the upper and lower surfaces of the blade expands in response to heat from the flame, thereby preventing flames and toxic smoke from entering other spaces. It has the effect of preventing the spread.

In addition, in the event of a fire, as the fireproof fillers attached to the upper and lower outer surfaces and both outer surfaces of the body expand in response to the heat from the flame, they fill the gaps and seams between the exhaust duct and the damper, so flames and toxic smoke are different spaces. It has the effect of preventing the spread of

In addition, the fireproof filler is manufactured to be attached to the upper and lower outer surfaces and both outer surfaces of the body in advance during the manufacturing process of the damper prior to construction, thereby preventing the spread of flames and toxic smoke in the event of a fire after construction. The workability is excellent, and the manufacturing process is also easy, so there is an effect of improving productivity and reducing manufacturing cost.

1 to 3 are views showing a temporary example of the body in the fire damper for an exhaust duct according to the present invention.

4 to 6 are views showing another embodiment of the body according to the present invention.

7 to 9 are views showing another embodiment of the body according to the present invention.

10 to 12 are views showing another embodiment of the body according to the present invention.

13 is a view showing another embodiment of a body according to the present invention;

14 is a view showing a state in which a fire resistant filler is attached to the body and blade of the fire damper for an exhaust duct according to the present invention.

15 is a view showing the structure of the opening and closing means disposed up and down inside the body according to the present invention.

Figure 16 is a view showing the structure of the opening and closing means arranged up and down on the inner front and rear of the body according to the present invention.

17 is a view showing a state in which the fixing clip is bound to the blade according to the present invention.

18 is a view showing the closed state of the blade in the fire damper for an exhaust duct according to the present invention.

In the best form for the practice of the present invention, the fire damper for the exhaust duct is installed in the exhaust duct (D) in the building to prevent the spread of flames and toxic smoke. being the body 100; Opening/closing means 200 comprising a plurality of rotation shafts 210 rotatably installed inside the body 100 and a plurality of blades 220 respectively coupled to the rotation shafts 210 to open and close the passage of the body 100 . ); Link means 300 comprising a fixing bracket 310 fixed to each of the blades 220 and a link member 320 that is link-coupled to the fixing bracket 310 to interlock the blades 220 with each other; a fixed fuse 400 connected between the body 100 and the blade 220 to release the binding of the blade 220 in an open state while being cut by flame and heat; and an elastic spring 500 connected between the inner bottom of the body 100 and the bottom surface of the lower blade 220 to provide an elastic force.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

The fire damper for an exhaust duct according to the present invention is installed in the exhaust duct (D) in a building to prevent the spread of flames and toxic smoke, and includes a body (100), an opening/closing means (200), a link means (300), and fixing. It includes a fuse 400 and an elastic spring 500 .

First, the body 100 is opened front and rear to form a passage inside, and is composed of a combination of an upper plate and a lower plate made of a metal plate, and side plates provided on both sides of the upper plate and the lower plate, respectively.

This body 100 may be configured as a built-in structure installed inside the exhaust duct (D) or an external structure connected between a plurality of exhaust ducts (D) depending on the situation of the exhaust duct construction site. Various embodiments of the structure of the body related thereto will be described.

1 to 3, the body 100 is composed of an upper plate, a lower plate, and a combination of side plates provided on both sides of the upper and lower plates, respectively, at the front and rear ends of the upper and lower plates and the front and rear ends of the side plates Each of the inner flanges 110 bent inwardly extending may be formed.

The body 100 having the above structure is a built-in structure installed inside the exhaust duct (D), and after being inserted and installed inside the exhaust duct (D), bolts and the like are fastened from the outside of the exhaust duct (D). to fix it

4 to 6, the body 100 is composed of an upper plate, a lower plate, and a combination of side plates provided on both sides of the upper plate and the lower plate, and the front and rear ends of the upper plate and the lower plate are bent inwardly and extended. The inner flanges 110 are formed, respectively, and the front and rear ends of the side plates may be respectively formed with outer flanges 120 extending outwardly in multiple stages.

The body 100 having the above structure is a built-in structure installed inside the exhaust duct (D) like the structure of the body described above, and after being inserted into the exhaust duct (D), the exhaust duct (D) Fix it by fastening bolts, etc., from the outside of the

7 to 9, the body 100 is composed of a combination of an upper plate, a lower plate, and side plates provided on both sides of the upper plate and the lower plate, and the front ends of the upper plate, the lower plate and the side plate are multi-staged to the outside. The bent outer flange 120 is formed, respectively, and the rear end of the upper plate, the lower plate, and the side plate may be respectively formed with the inner flange 110 bent inwardly extending.

The body 100 having the above structure is a built-in structure installed inside the exhaust duct (D) like the structure of the body described above, but at the end of the exhaust duct (D) where the outer flange 120 faces each other. It is fixed by fastening bolts or the like in a state in close contact between the formed flanges.

10 and 12, the body 100 is composed of an upper plate, a lower plate, and a combination of side plates provided on both sides of the upper and lower plates, respectively, at the front and rear ends of the upper and lower plates and the front and rear ends of the side plates The outer flanges 120 extending outwardly in multiple stages may be respectively formed.

The body 100 having the above structure is an external structure connected between a plurality of exhaust ducts (D), and an exhaust duct (D) in which outer flanges 120 respectively formed at front and rear ends of the body 100 face each other. ) in close contact with the flange formed at the end of the bolt, etc. to fix it.

13, the body 100 may be configured in a cylindrical shape. This cylindrical body 100 is for connection with the cylindrical exhaust duct (D).

On the other hand, a plurality of reinforcing frames 130 are installed to be spaced apart from each other along the longitudinal direction of the body 100 on the upper inner surface and the lower inner surface of the body 100 . The reinforcing frame 130 is formed in a “L” shape.

The reinforcing frame 130 serves to reinforce the structural strength of the body 100 to prevent distortion and deformation.

As shown in FIG. 14 , a fire resistant filler 600 in the form of sheet paper may be attached to the upper and lower surfaces of the blade 220 to seal the damper passage as it expands in response to heat caused by flames and pyrotechnic heat.

Since the conventional fire dampers block the damper passage only by the operation of the blades when a fire occurs, there is a problem that flames and toxic gases penetrate into the gaps generated between the blades.

In order to solve this problem, in the present invention, a fire-resisting filler 600 in the form of sheet paper is attached to the upper and lower surfaces of the blade 220, respectively, and the fire-resisting filler 600 expands rapidly in volume when the flame is ignited. Therefore, when a fire occurs, it expands in response to the heat caused by the flame and completely fills the gap between the blades 220, thereby preventing the flame and toxic smoke from spreading to other spaces.

In addition, the fire resistant filler 600 in the form of sheet paper may be attached to the upper inner surface and the lower inner surface of the body 100 to seal the damper passage as it expands in response to heat caused by flames and pyrotechnic heat.

In addition, although not shown in the drawings, fire-resisting fillers 600 in the form of sheet paper are attached to the outer surfaces of the upper and lower portions and both outer surfaces of the body 100 to seal the damper passage as they expand in response to heat caused by flames and fire heat, respectively. can be

Conventionally, there is a problem in that flames and toxic smoke easily penetrate through gaps generated in the process of installing a damper in an exhaust duct or installing a damper in a wall penetrating part.

In addition, in the prior art, it is difficult and difficult to separately install a structure for preventing the spread of flame and toxic smoke in the gap and seam between the exhaust duct and the damper at the construction site, so work time is delayed. There is this.

In order to solve this, the present invention provides a gap between the exhaust duct and the damper as the intumescent fireproof filler 600 attached to the outer surfaces of the upper and lower parts of the body 100 and both outer surfaces expands in response to heat from the flame when a fire occurs. And by filling the seam, it is possible to prevent the spread of flames and toxic smoke to other spaces.

In addition, the fire resistant filler 600 is manufactured to be attached to the upper and lower outer surfaces and both outer surfaces of the body 100 in advance during the manufacturing process of the damper prior to construction, thereby preventing the spread of flames and toxic smoke in the event of a fire after construction. At the same time, it has excellent constructability due to easy construction, and the manufacturing process is also easy to improve productivity and reduce manufacturing costs.

The opening/closing means 200 normally maintains an open state to ventilate indoor and outdoor air, and operates automatically when a fire occurs to close the damper passage to prevent the spread of fire.

As shown in FIG. 15 , the opening/closing means 200 may be configured in a structure in which a plurality of openings and closing means 200 are vertically disposed inside the body 100 .

As shown in FIG. 16 , the opening/closing means 200 may have a dual structure in which a plurality of the opening and closing means 200 are vertically disposed on the inside front and rear sides of the body 100 , respectively.

In particular, the opening/closing means 200 can prevent the flame from penetrating into the adjacent exhaust duct even when the flame intensity is strong according to the double structure disposed on the inner front and rear of the body 100, respectively. And, even when a failure occurs in the blade 220 located on the front side, it is possible to prevent the spread of the flame by the blade 220 located on the rear side, so it is stable.

On the other hand, the opening and closing means 200 is a plurality of rotation shafts 210 rotatably installed inside the body 100 , and a plurality of blades respectively coupled to the rotation shafts 210 to open and close the passage of the body 100 . (220).

The opening/closing means 200 configured as described above is normally maintained with the blades 220 in an open state.

That is, the lower blade 220 is maintained connected to the inner bottom surface of the body 100 through the elastic spring 500 and the fixed fuse 400 .

Therefore, the plurality of blades 220 are maintained in a horizontal state by the elastic spring 500 and the fixed fuse 400, and ventilation is made.

In addition, when a fire occurs, when flames and toxic smoke rise above a certain temperature while passing through the inside of the body 100, the fixed fuse 400 is melted and cut through the elastic restoring force of the elastic spring 500 blade ( 220) rotate to close the damper passage.

The rotation shaft 210 rotatably supports each of the blades 220 , and both ends thereof are rotatably supported through bearings (not shown) installed on both inner surfaces of the body 100 .

Both ends of the rotating shaft 210 may be configured to be respectively supported on both inner surfaces of the body 100 .

In addition, both ends of the rotating shaft 210 may be configured to protrude from both outer surfaces of the body 100 .

17, a plurality of fixing clips 700 are bound to the front and rear ends of the blade 220 to strengthen the fixing force of the fire resistant filler 600 attached to the upper and lower surfaces of the blade 220. can

The fixing clip 700 is preferably made of a metal material having an elastic force as a whole.

The fixing clip 700 is bound to the front and rear ends of the blade 220 to fix and support the fire resistant filler 600 attached to the upper and lower surfaces of the blade 220 .

The link means 300 includes a fixing bracket 310 fixed to the blade 220, respectively, and a link member 320 coupled to the fixing bracket 310 to link the blades 220 to each other.

The link means 300 connects the middle of the blades 220 in a link type so that a plurality of blades 220 are rotated in cooperation with each other.

The fixed fuse 400 is connected between the body 100 and the blade 220 so that the binding of the blade 220 in an open state is released while being cut off by flame and heat. Preferably, the fixed fuse 400 is melted and broken only in a temperature range above a predetermined temperature.

The elastic spring 500 is connected between the inner bottom of the body 100 and the bottom surface of the lower blade 220 to provide an elastic force.

The elastic spring 500 is a general spring that exerts an elastic force, and is connected between the inner bottom of the body 100 and the bottom surface of the lower blade 220 so that the blade 220 of the opening and closing means 200 is in a horizontal state. maintained and kept open.

As shown in FIG. 18 , in the present invention, when the fixed fuse 400 is melted and cut due to the heat caused by the flame when a fire occurs, the blade 220 is rotated by the elastic restoring force of the stretched elastic spring 500 . while closing the passage of the body 100 . In addition, as the fire resistant filler 600 attached to the upper and lower surfaces of the blade 220 expands in response to heat from the flame, the damper passage is sealed to prevent the flame and toxic smoke from spreading to other spaces.

Although the present invention has been mainly described with reference to the accompanying drawings, it will be apparent to those skilled in the art that various modifications can be made without departing from the scope of the present invention from these descriptions. Accordingly, the scope of the present invention should be construed by the appended claims to include examples of many such modifications.

Claims

In the fire damper installed in the exhaust duct (D) in the building to prevent the spread of flame and toxic smoke,

The front and rear are opened, the body 100 is formed a passage to the inside;

Opening/closing means 200 comprising a plurality of rotation shafts 210 rotatably installed inside the body 100 and a plurality of blades 220 respectively coupled to the rotation shafts 210 to open and close the passage of the body 100 . );

Link means 300 comprising a fixing bracket 310 fixed to each of the blades 220 and a link member 320 that is link-coupled to the fixing bracket 310 to interlock the blades 220 with each other;

a fixed fuse 400 connected between the body 100 and the blade 220 to release the binding of the blade 220 in an open state while being cut by flame and heat; and

Fire damper for exhaust duct comprising a; an elastic spring (500) connected between the inner bottom of the body (100) and the bottom surface of the lower blade (220) to provide an elastic force.
The method according to claim 1,

The body 100 is composed of an upper plate, a lower plate, and a combination of side plates provided on both sides of the upper and lower plates, respectively,

Fire damper for exhaust duct, characterized in that the front and rear ends of the upper and lower plates and the front and rear ends of the side plates are respectively formed with inner flanges (110) bent and extended inward.
The method according to claim 1,

The body 100 is composed of an upper plate, a lower plate, and a combination of side plates provided on both sides of the upper and lower plates, respectively,

The front and rear ends of the upper plate and the lower plate are respectively formed with inner flanges (110) bent and extended inward, and the front and rear ends of the side plates are respectively formed with outer flanges (120) bent and extended outward in multiple stages. for fire dampers.
The method according to claim 1,

The body 100 is composed of an upper plate, a lower plate, and a combination of side plates provided on both sides of the upper and lower plates, respectively,

The front ends of the upper plate, the lower plate and the side plate are respectively formed with outer flanges 120 bent and extended outward in multiple stages, and the rear ends of the upper plate, the lower plate and the side plate are respectively formed with inner flanges 110 bent and extended inward. fire damper for exhaust ducts.
The method according to claim 1,

The body 100 is composed of an upper plate, a lower plate, and a combination of side plates provided on both sides of the upper and lower plates, respectively,

A fire damper for an exhaust duct, characterized in that the front and rear ends of the upper and lower plates and the front and rear ends of the side plates are respectively formed with outer flanges (120) extending outwardly in multiple stages.
The method according to claim 1,

The body 100 is a fire damper for an exhaust duct, characterized in that made of a cylindrical shape.
The method according to claim 1,

The fire damper for the exhaust duct, characterized in that a plurality of the opening and closing means (200) are arranged vertically inside the body (100).
The method according to claim 1,

The opening/closing means (200) is a fire damper for an exhaust duct, characterized in that it has a dual structure in which a plurality of them are vertically disposed on the front and rear sides of the body (100).
The method according to claim 1,

Both ends of the rotation shaft (210) are fire dampers for exhaust ducts, characterized in that each supported on both inner surfaces of the body (100).
The method according to claim 1,

Both ends of the rotating shaft (210) are fire dampers for exhaust ducts, characterized in that each protrudes to both outer surfaces of the body (100).
The method according to claim 1,

Exhaust duct, characterized in that a plurality of reinforcing frames 130 are installed spaced apart along the longitudinal direction of the body 100 in order to reinforce the structural strength of the body 100 on the upper inner surface and the lower inner surface of the body 100 fire damper.
The method according to claim 1,

Fire damper for exhaust duct, characterized in that the sheet paper type fireproof filler 600 is respectively attached to the upper surface and lower surface of the blade 220 to seal the damper passage as it expands in response to heat caused by flames and pyrotechnic heat.
The method according to claim 1,

Fire damper for exhaust duct, characterized in that the fire-resistant filler 600 in the form of sheet paper is attached to the upper inner surface and the lower inner surface of the body 100 so as to seal the damper passage as it expands in response to heat caused by flame and fire. .
The method according to claim 1,

Exhaust duct, characterized in that the fireproof filler 600 in the form of sheet paper is attached to the outer surfaces of the upper and lower portions of the body 100 and the outer surfaces of both sides to seal the damper passage as it expands in response to heat caused by flames and fire heat, respectively. for fire dampers.
The method according to claim 1,

Fire prevention for an exhaust duct, characterized in that a plurality of fixing clips 700 are bound to the front and rear ends of the blade 220 to strengthen the fixing force of the fire resistant filler 600 attached to the upper and lower surfaces of the blade 220 damper.