A fresh air system based on a single burning test chamber

Abstract

The present invention discloses a fresh air system based on a single burning test chamber. The single burning test chamber includes a combustion chamber and a control room. The control room is provided with a main access door and a single-leaf door. The fresh air system includes a fresh air unit, an air inlet duct, an air supply duct, an annular duct, a first air outlet, a second air outlet, a third air outlet, an air suction port, an exhaust duct and an air curtain unit. The air supply duct is communicated with the annular duct. The air suction port is arranged on the inner wall surface of the control room. The first air outlet is located on the inner wall surface on the other side. The second air outlet and the third air outlet are respectively arranged on the inner wall surfaces on the remaining two sides of the control room. The first air outlet, the second air outlet and the third air outlet are respectively communicated with the annular duct. The air curtain unit is installed along the side for hinging of the single-leaf door. The air inlet end of the air curtain unit is communicated with the exhaust duct. The present invention can prevent the burning air from entering the control room and can purify the air in the control room more comprehensively and quickly.

Description

Technical Field

[0001] The present invention relates to a fresh air system based on a single combustion test chamber. Background Art

[0002] A fresh air system is an independent air treatment system composed of a supply air system and an exhaust air system, which is divided into two types: a ducted fresh air system and a ductless fresh air system. The ducted fresh air system consists of a fresh air fan and duct fittings, purifies outdoor air through the fresh air fan and introduces it into the room, and discharges indoor air through the duct; the ductless fresh air system consists of a fresh air fan, and also purifies outdoor air through the fresh air fan and introduces it into the room.

[0003] In some engineering test laboratories, such as a single combustion test chamber, when performing multiple tests, testers need to enter the combustion chamber of the single combustion test chamber to ignite, and then return to the control room to operate the equipment and observe the test. During the ignition process, the combustion chamber and the control room will be in a connected state, which causes the flue gas generated by the previous combustion to be introduced into the interior of the control room, resulting in an increase in the flue gas content inside the control room and seriously endangering the physical health of the testers. Moreover, due to the stratification of the air inside the control room in the vertical direction, the air distribution inside the control room is uneven, making it easy for the flue gas entering the control room to remain inside the control room and unable to be discharged in time, endangering the physical health of the testers. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a fresh air system based on a single combustion test chamber, which can prevent the combustion air from entering the control room and can purify the air inside the control room more comprehensively and quickly.

[0005] To solve the above technical problem, the technical solution adopted by the present invention is as follows:

[0006] A fresh air system based on a single burning test chamber. The single burning test chamber includes a combustion chamber and a control room. The control room is provided with a main access door and a single-leaf door. The control room communicates with the combustion chamber through the single-leaf door. The fresh air system is installed in the control room. The fresh air system includes a fresh air unit, an air inlet pipe and an air supply pipe. The air inlet pipe and the air supply pipe are respectively connected to the air inlet end and the air outlet end of the fresh air unit. It is characterized in that: the fresh air system further includes an annular pipe, a first air outlet, a second air outlet, a third air outlet, an air suction port, an exhaust pipe and an air curtain unit. The annular pipe is connected end to end. The annular pipe is arranged on the top of the control room. The air supply pipe is communicated with the annular pipe. The air suction port is arranged on the inner wall surface of the side of the control room adjacent to the single-leaf door, and the air suction port is adjacent to the single-leaf door. The air suction port is connected to an external exhaust fan through the exhaust pipe. The first air outlet is located on the inner wall surface of the opposite side to the side where the air suction port is located, and is located at the bottom of the control room. The second air outlet and the third air outlet are respectively arranged on the inner wall surfaces of the other two sides of the control room. The second air outlet and the third air outlet are respectively located in the middle and at the top of the control room. The first air outlet, the second air outlet and the third air outlet are respectively communicated with the annular pipe. The opening of the first air outlet is smaller than the openings of the second air outlet and the third air outlet. The air curtain unit is installed along the hinged side of the single-leaf door. The air inlet end of the air curtain unit is communicated with the exhaust pipe. The air curtain unit blows air towards the other side of the single-leaf door to form an air curtain, and the wind direction of the air curtain is biased towards the combustion chamber. The air outlet of the air curtain unit can be opened and closed.

[0007] Further, the air curtain unit includes a mounting seat and a wind guiding circular pipe. A vertical mounting groove is provided on the mounting seat. Both ends of the wind guiding circular pipe are closed. The wind guiding circular pipe is located in the mounting groove. Both ends of the wind guiding circular pipe are respectively rotatably supported at both ends of the mounting groove. Both side surfaces of the mounting groove are respectively in contact with the side surface of the wind guiding circular pipe. An air inlet space is left between the wind guiding circular pipe and the bottom surface of the mounting groove. Both ends of the air inlet space are respectively closed by end plates. An air inlet hole communicated with the air inlet space is provided at the bottom of the mounting groove. The air inlet hole serves as the air inlet end of the air curtain unit. Two axial strip-shaped air guiding openings communicated with the middle hole of the wind guiding circular pipe are provided on the side surface of the wind guiding circular pipe located in the air inlet space. A limiting convex strip is provided in the middle of the side surface of the wind guiding circular pipe facing the outside. By rotating the wind guiding circular pipe until the limiting convex strip abuts against one side of the mounting groove, a corresponding strip-shaped air guiding opening faces the outside, while the other strip-shaped air guiding opening is still located in the air inlet space.

[0008] Further, rotating support frames are respectively fixedly provided at both ends of the mounting groove. Rotating shafts are respectively provided at both ends of the wind guiding circular pipe. The rotating shafts are respectively rotatably inserted into the rotating holes of the rotating support frames.

[0009] Further, the included angle between the two strip-shaped air guiding openings is 60°.

[0010] Further, the air suction port is located at the top of the control room.

[0011] Further, the annular pipeline is fixed to the top of the inner wall surface of the control room through a ferrule.

[0012] Further, the distance between the first air outlet and the ground of the control room is 20 cm - 30 cm, the distance between the second air outlet and the ground of the control room is 150 cm - 160 cm, and the distance between the third air outlet and the ground of the control room is 200 cm - 210 cm.

[0013] Further, the first air outlet, the second air outlet, and the third air outlet are all rectangular louver air outlets with adjustable air direction and air outlet size.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] In the present invention, the bottom, middle, and top of the control room are respectively blown by the first air outlet, the second air outlet, and the third air outlet, so that the air on each layer in the control room can flow orderly. Since the opening of the first air outlet is small, the wind speed blown out by the first air outlet is the fastest. In this way, the wind blown out by the first air outlet will drive the wind directions blown out by the second air outlet and the third air outlet to the position of the air suction opening, and the dirty air will also be concentrated at the position of the air suction opening, so that the dirty air in the control room can be discharged more comprehensively and quickly through the air suction opening, achieving a comprehensive and rapid purification effect. In addition, since the position of the single-leaf door is adjacent to the position of the air suction opening, the position where the dirty air is concentrated is also the position of the single-leaf door. When the single-leaf door is opened, the dirty air can also be discharged from the opening of the single-leaf door.

[0016] When the single-leaf door of the present invention is opened, an air curtain can be formed through the air curtain unit to block the flue gas in the combustion chamber from entering the control room, and the air used to form the air curtain is branched from the exhaust duct, rather than the fresh air sent in by the fresh air unit. In this way, the loss of fresh air in the control room can be reduced, and the inside of the control room can be maintained in a positive pressure state. Since the air curtain wind direction is biased towards the combustion chamber, when the single-leaf door is opened, most of the air curtain wind blows towards the combustion chamber, and since the inside of the control room is in a positive pressure state, part of the air in the control room will be discharged from the opening of the open door, further reducing the probability of the flue gas in the combustion chamber entering the control room, thereby ensuring the health of the detection personnel inside the control room. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a three-dimensional schematic diagram of the present invention;

[0018] Figure 2 is a top view schematic diagram of the single combustion test chamber of the present invention;

[0019] Figure 3 is a three-dimensional schematic diagram of the air curtain unit of the present invention;

[0020] Figure 4 is a schematic cross-sectional view of the air curtain unit of the present invention;

[0021] Figure 5 is a front view schematic diagram of the louver air outlet of the present invention;

[0022] Figure 6 is a schematic diagram of air flow in the main view direction when the first air outlet of the present invention blows obliquely upward towards the air suction port;

[0023] Figure 7 is a schematic diagram of air flow in the side view direction when the first air outlet of the present invention blows obliquely upward towards the air suction port;

[0024] Figure 8 is a schematic diagram of air flow in the main view direction when the first air outlet of the present invention blows horizontally.

[0025] Meanings of the reference numerals in the figure:

[0026] 1 - Fresh air unit; 11 - Air inlet duct; 12 - Air supply duct; 2 - Annular duct; 3 - First air outlet; 4 - Second air outlet; 41 - Connecting pipe; 5 - Third air outlet; 6 - Air suction port; 61 - Exhaust duct; 611 - Exhaust branch pipe; 62 - Air curtain unit; 621 - Mounting base; 6211 - Mounting groove; 622 - Air guiding circular pipe; 6221 - Limit rib; 6222 - Strip-shaped air outlet; 6223 - Rotating shaft; 623 - Rotating support frame; 624 - End plate; 625 - Intake space; 626 - Intake hole; 7 - Control room; 71 - Main access door; 72 - Single-leaf door; 8 - Combustion chamber; 9 - Louver air outlet; 91 - Blade. Detailed implementation manners

[0027] The present invention will be further described below in conjunction with embodiments.

[0028] As Figure 1 and Figure 2 shown, a fresh air system based on a single-body combustion test chamber, wherein the combustion test chamber includes a combustion chamber 8 and a control room 7. The side of the control room 7 is surrounded by four walls. A main access door 71 and a single-leaf door 72 are respectively provided on the front and rear side walls of the control room 7. The single-leaf door 72 is close to the left side wall. The control room 7 is communicated with the combustion chamber 8 through the single-leaf door 72. The fresh air system is installed in the control room 7. Among them, the fresh air system includes a fresh air unit 1, an air inlet duct 11, an air supply duct 12, an annular duct 2, a first air outlet 3, a second air outlet 4, a third air outlet 5, an air suction port 6, an exhaust duct 61 and an air curtain unit 62.

[0029] The air inlet duct 11 and the air supply duct 12 are respectively connected to the air inlet end and the air outlet end of the fresh air unit 1. The fresh air unit 1 extracts the outside air through the air inlet duct 11, purifies the passing air, and then sends it out through the air supply duct 12. The annular duct 2 is connected end to end, fixed to the top of the inner wall surface of the control room 7 through the ferrule 21, and arranged along the top edge of the control room 7. The air supply duct 12 is communicated with the annular duct 2.

[0030] The air suction port 6 is arranged on the left inner wall surface of the control room 7 adjacent to the single-leaf door 72, and the air suction port 6 is adjacent to the single-leaf door 72. The air suction port 6 is connected to the exhaust duct 61. The exhaust duct 61 is further connected to an external exhaust fan through an exhaust branch pipe 611 extending upward and communicating with it. The first air outlet 3 is located on the right inner wall surface opposite to the side where the air suction port 6 is located, and at the bottom of the control room 7, so as to sweep the air at the bottom of the control room 7. The second air outlet 4 and the third air outlet 5 are respectively arranged on the rear and front inner wall surfaces of the control room 7. The second air outlet 4 and the third air outlet 5 are respectively located in the middle and at the top of the control room 7, so as to sweep the air in the middle and at the top of the control room 7. The first air outlet 3, the second air outlet 4 and the third air outlet 5 are respectively communicated with the annular duct 2 through the connecting pipe 41. The opening of the first air outlet 3 is smaller than the openings of the second air outlet 4 and the third air outlet 5, so that the wind speed of the wind blown out from the first air outlet 3 will be greater than the wind speed of the wind blown out from the second air outlet 4 and the third air outlet 5, so that the wind blown out from the first air outlet 3 can guide the wind blown out from the second air outlet 4 and the third air outlet 5.

[0031] The air curtain unit 62 is installed along the hinged side of the single-leaf door 72, so that the air curtain unit 62 can blow towards the opening of the single-leaf door 72. The air inlet end of the air curtain unit 62 is communicated with the exhaust duct 61. The air curtain unit 62 blows towards the other side of the single-leaf door 72 to form an air curtain. Thus, when the single-leaf door 72 is opened, the flue gas of the combustion chamber 8 can be blocked from entering the control room 7, and the wind direction of the air curtain is biased towards the combustion chamber 8, so that the blown air can be discharged towards the combustion chamber 8. The air outlet of the air curtain unit 62 can be opened and closed. The air curtain unit 62 can be opened when the single-leaf door 72 is opened, and the air curtain unit 62 is also closed when the single-leaf door 72 is closed.

[0032] During use, the fresh air unit 1 sends the purified fresh air into the annular duct 2. Since the annular duct 2 is connected end to end, the fresh air blows out from the first air outlet 3, the second air outlet 4, and the third air outlet 5, thereby blowing on the bottom, middle, and top of the control room 7. Since the wind speed of the wind blowing out from the first air outlet 3 is greater than that of the wind blowing out from the second air outlet 4 and the third air outlet 5, the wind blowing out from the second air outlet 4 and the third air outlet 5 will be guided by the wind blowing out from the first air outlet 3 and blow towards the side where the air suction port 6 and the single-leaf door 72 are located. The dirty air will also be concentrated on the side where the air suction port 6 and the single-leaf door 72 are located. The air suction port 6 sucks the dirty air on its side and discharges it outward through the exhaust duct 61. Before opening the single-leaf door 72 to enter the combustion chamber 8, it is necessary to first open the air curtain unit 62. The air curtain unit 62 generates an air curtain. The air used for the air curtain is the dirty air in the control room 7. Then, open the single-leaf door 72. The air curtain blows towards the opening of the single-leaf door 72. Since the control room 7 is in a positive pressure state, the dirty air on this side in the control room 7 will also be discharged from the opening of the single-leaf door 72 to the combustion chamber 8, thereby better preventing the flue gas in the combustion chamber 8 from entering the control room 7 and purifying the air in the control room 7 faster. After ignition is completed, close the single-leaf door 72 and then close the air curtain unit 62.

[0033] On the other hand, since carbon dioxide is denser than air, the carbon dioxide entering the control room 7 will be close to the ground. Therefore, the first air outlet 3 can better blow the carbon dioxide towards the side where the air suction port 6 and the single-leaf door 72 are located for discharge. The wind blowing out from the first air outlet 3 will diffuse from the surface of the bottom plate to form an organized air flow pattern. The second air outlet 4 and the third air outlet 5 are respectively arranged in the middle and at the top, making the air flow pattern in the control room stable and not forming large vortices. The air temperature is relatively stable in the horizontal direction and stratified in the vertical direction. During the exhaust process of the air suction port 6, the wake of the fresh air can move the dirty air upward under the driving force of the air flow pattern, bringing it above the side of the control room where the air suction port is located and discharging it from the air suction port.

[0034] Such as Figures 6 to 7 is a schematic diagram of the air flow direction in the control room 7 during operation. Among them, Figure 6 in, the blowing direction of the first air outlet 3 is obliquely upward towards the air suction port 6, and the wind blown out from the second air outlet 4 and the third air outlet 5 flows towards the air suction port 6 under the drive of the wind blown out from the first air outlet 3. Figure 7 For Figure 6 side view schematic diagram in the state. Figure 7 in, the blowing direction of the first air outlet 3 is adjusted to blow horizontally, and the air flow moves upward near the air suction port 6.

[0035] Among them, such as Figure 3 and Figure 4As shown in the figure, the air curtain unit 62 includes a mounting base 621 and a wind guiding circular pipe 622. The mounting base 621 is a square through pipe, and one side of the square through pipe is removed, thereby forming a vertical mounting groove 6211 on the mounting base 621. Both ends of the wind guiding circular pipe 622 are closed. The wind guiding circular pipe 622 is located in the mounting groove 6211, and a part of the wind guiding circular pipe 622 protrudes from the notch of the mounting groove 6211. Both ends of the wind guiding circular pipe 622 are respectively rotatably supported at both ends of the mounting groove 6211. The diameter of the wind guiding circular pipe 622 is equal to the width of the mounting groove 6211. Both side surfaces of the mounting groove 6211 are respectively in contact with the side surface of the wind guiding circular pipe 622. There is an air intake space 625 left between the bottom surface of the wind guiding circular pipe 622 and the mounting groove 6211. Both ends of the air intake space 625 are respectively closed by end plates 624. The end plates 624 are respectively in contact with both end surfaces of the wind guiding circular pipe 622. An air intake hole 626 communicating with the air intake space is provided at the bottom of the mounting groove 6211. The air intake hole 626 serves as the air intake end of the air curtain unit 62. On the side surface of the wind guiding circular pipe 622 located in the air intake space, there are two axial strip-shaped air guiding openings 6222 communicating with the middle hole of the wind guiding circular pipe 622. The included angle between the two strip-shaped air guiding openings 6222 is 60°. A limiting rib 6221 is provided in the middle of the side surface of the wind guiding circular pipe 622 facing the outside. The limiting rib 6221 is welded to the wind guiding circular pipe 622. When in use, when the wind guiding circular pipe 622 is rotated until the limiting rib 6221 abuts against one side of the mounting groove 6211, a corresponding strip-shaped air guiding opening 6222 faces the outside, while the other strip-shaped air guiding opening 6222 is still located in the air intake space 625. In this way, the air entering the air intake space 625 from the exhaust duct 61 will enter the wind guiding circular pipe 622 from the strip-shaped air guiding opening 6222 located in the air intake space 625, and then be blown out from the other strip-shaped air guiding opening 6222 to form an air curtain. In this embodiment, when the wind guiding circular pipe is rotated by 60°, the limiting rib 6221 can abut against one side of the mounting groove 6211. The structure of the above air curtain unit 62 is simple and convenient to use.

[0036] The rotatable mounting structure of the wind guiding circular pipe 622 is as follows: Rotating support frames 623 are respectively and fixedly provided at both ends of the mounting groove 6211. Rotation holes are provided in the rotating support frames 623. Shafts 6223 are respectively provided at both ends of the wind guiding circular pipe 622. The shafts 6223 are respectively rotatably inserted into the rotation holes of the rotating support frames 623.

[0037] In this embodiment, the air suction port 6 is located at the top of the control room 7. Since the air flow guided by the air blown out from the first air outlet 3 blows towards the inner wall surface where the air suction port 6 is located, the air flow near or blowing on the inner wall surface where the air suction port is located will flow upward, so that the dirty air can be discharged better and faster through the air suction port provided at the top.

[0038] More reasonably, the distance between the first air outlet 3 of this embodiment and the ground of the control room 7 is 20 cm - 30 cm, the distance between the second air outlet 4 and the ground of the control room 7 is 150 cm - 160 cm, and the distance between the third air outlet 5 and the ground of the control room 7 is 200 cm - 210 cm. The advantage of such a design is that since the height of an adult sitting on a chair is about 120 cm - 130 cm, it can avoid the fresh air directly blowing on the heads of the testers and improve the comfort of the testers.

[0039] For better air blowing, the first air outlet 3, the second air outlet 4, and the third air outlet 5 of this embodiment are all rectangular louver air vents 9 that can adjust the air direction and air volume, as Figure 5 shown. The louver air vent 9 is a conventional structure, which is provided with multiple blades 91. Friction plates are provided at the hinge joints at both ends of the blades 91. The air direction and air volume can be adjusted by swinging the blades, and the friction plates prevent the blades from rotating randomly due to the blowing.

[0040] The above embodiments of the present invention do not limit the protection scope of the present invention. The implementation manners of the present invention are not limited thereto. All kinds of modifications, substitutions, or changes made to the above structure of the present invention according to the above content of the present invention, in accordance with the common general knowledge and customary means in the art, without departing from the above basic technical idea of the present invention, shall fall within the protection scope of the present invention.

Claims

1. A fresh air system based on a single burning test chamber, the single burning test chamber comprising a combustion chamber and a control room, the control room being provided with a main access door and a single-leaf door, the control room communicating with the combustion chamber through the single-leaf door, the fresh air system being installed in the control room, the fresh air system comprising a fresh air unit, an air inlet duct and an air supply duct, the air inlet duct and the air supply duct being respectively connected to the air inlet end and the air outlet end of the fresh air unit, characterized in that: The fresh air system further includes an annular duct, a first air outlet, a second air outlet, a third air outlet, an air suction port, an exhaust duct, and an air curtain unit. The annular duct is connected end to end, and the annular duct is arranged on the top of the control room. The air supply duct is communicated with the annular duct. The air suction port is arranged on the inner wall surface of the side of the control room adjacent to the single-leaf door, and the air suction port is adjacent to the single-leaf door. The air suction port is connected to an external exhaust fan through the exhaust duct. The first air outlet is located on the inner wall surface of the other side opposite to the side where the air suction port is located, and is located at the bottom of the control room. The second air outlet and the third air outlet are respectively arranged on the inner wall surfaces of the other two sides of the control room. The second air outlet and the third air outlet are respectively located in the middle and at the top of the control room. The first air outlet, the second air outlet, and the third air outlet are respectively communicated with the annular duct. The opening of the first air outlet is smaller than the openings of the second air outlet and the third air outlet. The air curtain unit is installed along the side of the single-leaf door for hinging. The air inlet end of the air curtain unit is communicated with the exhaust duct. The air curtain unit blows air towards the other side of the single-leaf door to form an air curtain, and the wind direction of the air curtain is biased towards the combustion chamber. The air outlet of the air curtain unit can be opened and closed.

2. The fresh air system based on a single combustion test chamber according to claim 1, characterized in that: The air curtain unit includes a mounting seat and a wind guiding circular pipe. The mounting seat is provided with a vertical mounting groove. Both ends of the wind guiding circular pipe are closed. The wind guiding circular pipe is located in the mounting groove. Both ends of the wind guiding circular pipe are respectively rotatably supported at both ends of the mounting groove. Both side surfaces of the mounting groove are respectively in contact with the side surface of the wind guiding circular pipe. An air inlet space is left between the wind guiding circular pipe and the bottom surface of the mounting groove. Both ends of the air inlet space are respectively closed by end plates. An air inlet hole communicated with the air inlet space is arranged at the bottom of the mounting groove. The air inlet hole serves as the air inlet end of the air curtain unit. Two axial strip-shaped air guiding openings communicated with the middle hole of the wind guiding circular pipe are arranged on the side surface of the wind guiding circular pipe located in the air inlet space. A limiting convex strip is arranged in the middle of the side surface of the wind guiding circular pipe facing the outside. By rotating the wind guiding circular pipe until the limiting convex strip abuts against one side of the mounting groove, one corresponding strip-shaped air guiding opening faces the outside, while the other strip-shaped air guiding opening is still located in the air inlet space.

3. The fresh air system based on a single burner test chamber according to claim 2, wherein: Rotating support frames are respectively fixedly arranged at both ends of the mounting groove. Rotating shafts are respectively arranged at both ends of the wind guiding circular pipe. The rotating shafts are respectively rotatably inserted into the rotating holes of the rotating support frames.

4. The fresh air system based on a single-body combustion test chamber according to claim 3, wherein: The included angle between the two strip-shaped air guiding openings is 60°.

5. The fresh air system based on a single burner test chamber according to claim 1, characterized in that: The air suction port is located at the top of the control room.

6. The fresh air system based on a single-body combustion test chamber according to claim 1, wherein: The annular duct is fixed to the top of the inner wall surface of the control room through a ferrule.

7. The fresh air system based on a single-body combustion test chamber according to claim 1, wherein: The distance between the first air outlet and the ground of the control room is 20 cm - 30 cm. The distance between the second air outlet and the ground of the control room is 150 cm - 160 cm. The distance between the third air outlet and the ground of the control room is 200 cm - 210 cm.

8. The fresh air system based on a single-body combustion test chamber according to claim 1, wherein: The first air outlet, the second air outlet and the third air outlet are all rectangular louver air outlets with adjustable air direction and air output size.

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