Uniformly-distributed smoke exhaust or gas supply pipeline system and method

Abstract

The invention discloses a uniformly-distributed smoke exhaust or gas supply pipeline system and method, and belongs to the technical field of smoke exhaust, the uniformly-distributed smoke exhaust or gas supply pipeline system comprises a main pipeline, the air outlet end of the main pipeline is connected with a plurality of exhaust fans, and the main pipeline is symmetrically communicated with a plurality of suction units used for sucking smoke; the suction unit comprises first branch pipes and second branch pipes which are arranged in a staggered and communicated mode, a control assembly is arranged between the first branch pipes and the second branch pipes, the control assembly controls the first branch pipes and the second branch pipes to be communicated, and the first branch pipes or the second branch pipes located at the two ends of the control assembly are symmetrical. The first branch pipes and the second branch pipes are arranged in multiple stages, air inlet pipe openings are formed in the two ends of the first branch pipe or the second branch pipe of the last stage, and air suction hoods are arranged at the air inlet pipe openings. The problems that in a smoke exhaust system, the air inlet amount of each air suction opening is not uniform, and the smoke exhaust efficiency is low are solved.

Description

Technical Field

[0001] The present invention belongs to the technical field of smoke exhaust, and in particular relates to a uniformly distributed smoke exhaust or air supply pipeline system and method. Background Art

[0002] Some indoor smoke exhaust systems often use central smoke exhaust ducts, which have the advantages of low cost and easy installation. However, there are also some problems. For example, the air exhaust volume at each position of the duct suction port is difficult to control. Some suction ports have a large air intake, while other suction ports have a small air intake, resulting in different smoke exhaust efficiencies at different positions. For example, in some indoor barbecue and BBQ restaurants, if the air intake volumes of various suction ports are different, some places can be exhausted normally, while places with small air intake cannot be exhausted normally, which will cause smoke to spread indoors and affect the experience.

[0003] Moreover, some of the current smoke exhaust systems only perform single suction. When the smoke exhaust efficiency is reduced, the fan power is simply increased, which results in the smoke exhaust duct not being able to exhaust the smoke quickly and effectively, and will also increase the smoke exhaust cost, and will also cause greater vibration and noise in the duct. Therefore, a duct system and control method that can evenly exhaust smoke are needed to reasonably arrange the smoke exhaust and improve the smoke exhaust efficiency. Summary of the invention

[0004] In view of the above problems, the present invention provides a uniformly distributed smoke exhaust or air supply pipeline system and method, which is used to solve the problem of uneven air intake at each air intake port in the smoke exhaust system and low smoke exhaust efficiency.

[0005] To achieve the above object, the technical solution adopted by the present invention is: a uniformly distributed smoke exhaust pipe system, comprising a main pipe, a plurality of exhaust fans are connected to the air outlet end of the main pipe, and a plurality of suction units for extracting smoke are symmetrically connected to each other on the main pipe;

[0006] The suction unit comprises a first branch pipe and a second branch pipe which are arranged in a staggered manner and in communication with each other, a control component is arranged between the first branch pipe and the second branch pipe, the control component controls the communication between the first branch pipe and the second branch pipe, and the first branch pipes or the second branch pipes at both ends of the control component are symmetrical to each other;

[0007] The first branch pipe and the second branch pipe are arranged in multiple stages, and both ends of the first branch pipe or the second branch pipe of the last stage are air inlet openings, and air suction hoods are arranged at the air inlet openings.

[0008] Compared with the prior art, the beneficial effects of the present invention are as follows: by symmetrically arranging the suction units on the main pipe, and arranging the suction units in a completely symmetrical arrangement of the first branch pipe and the second branch pipe, the distance from each air inlet pipe opening to the main pipe and the pipe diameter can be made the same, so that the smoking areas in different positions can have the same exhaust volume, achieving uniform smoke exhaust, avoiding smoke backflow, and improving the overall smoking efficiency; the smoke exhaust area can be increased by setting up the suction hood.

[0009] As a further improvement of the above solution, the control component includes a connecting box, which is connected to the first branch pipe and the second branch pipe respectively. The connecting box is also provided with partitions for isolating the symmetrical air inlet ends on both sides of the connecting box.

[0010] The technical effect of the above improvement is: through the provided partition, the smoke sucked into the connecting box can be guided and separated, avoiding the smoke colliding with each other and generating resistance after entering the connecting box, thereby improving the smoke exhaust efficiency.

[0011] As a further improvement of the above solution, a movable piece is rotatably provided on one side of the air outlet end of the connecting box, and the movable piece can selectively connect the air outlet end of the connecting box with any air inlet end of the connecting box;

[0012] A driving source for driving the movable sheet to rotate is fixedly arranged on the outer side of the connecting box.

[0013] The technical effect of the above improvement is: by adjusting the actual size of the air inlet opening during air suction through the provided movable sheet, the actual air intake volume of the air inlet opening can be adjusted, so that smooth smoke exhaust operation can be achieved during smoke exhaust.

[0014] As a further improvement of the above solution, a sealing strip in contact with the inner wall of the connecting box is provided on the surface of the movable sheet.

[0015] The technical effect of the above improvement is that the smoke can be prevented from leaking from the gap between the movable sheet and the connecting box by means of the provided sealing strip.

[0016] As a further improvement of the above solution, detectors for measuring smoke velocity are provided on both side walls of the partition.

[0017] The technical effect of the above improvement is that the detector is mainly used to detect the smoke flow velocity to facilitate the calculation of the smoke exhaust volume.

[0018] A uniformly distributed air supply pipeline system replaces the exhaust fan with a hair dryer.

[0019] A control method for a uniformly distributed smoke exhaust pipe system includes a controller and a pipe system, and further includes the following steps:

[0020] Step 1: Preset the initial air intake volume: Start the exhaust fan to start exhausting smoke. The controller obtains the number of air intake ports connected to the control component and preliminarily calculates the total air volume in the main duct. When all air intake ports start to intake air, the air intake volume of a single air intake port is preliminarily determined as:

[0021] Initial air intake = total air volume / number of air intake openings;

[0022] Step 2: Calculate the actual exhaust volume: The detector detects the exhaust gas velocity and transmits the detected data to the controller. The controller performs calculations internally, and the actual exhaust gas intake volume Q is:

[0023] Q = VA,

[0024] Where A represents the opening and closing hole area of ​​the movable sheet in the connecting box, and V is the detected smoke velocity;

[0025] The calculation method of A is: A = l 1 × 2 ,

[0026] l 1 Indicates the width of the active piece, l 2 It represents the vertical distance between the movable piece and the end point of the separator set in the middle, l 2 It is related to the opening and closing angle of the movable piece and is solved by trigonometric functions;

[0027] Step 3: Feedback and adjustment: The controller compares the actual air intake volume data obtained by calculation with the preliminary air intake volume;

[0028] When the actual air intake is greater than the initial air intake, the controller adjusts the opening and closing angle of the movable sheet to reduce the air intake to the initial air intake.

[0029] When the actual air intake is less than the initial air intake, the controller controls the speed of the exhaust fan to increase, or more exhaust fans are connected to the grid to provide greater suction force, thereby achieving the initial air intake.

[0030] The technical effect of the above improvement is: first, by preliminarily estimating the total air intake volume in the main duct, since the first branch pipe and the second branch pipe are completely symmetrical, the preliminary air intake volume of each air inlet pipe opening can be directly calculated theoretically to ensure that the preliminary air intake volume quickly reaches the preset value, and then the actual air intake volume of the air inlet pipe opening is measured by actually measuring the air intake speed of the air inlet pipe opening to ensure that the actual air intake volume is qualified, and in the case of unqualified, the air intake volume of the entire system is stabilized by controlling the movable plate or 15.

[0031] As a further improvement of the above scheme, in step 3, in order to avoid smoke backflow, it is preferred to ensure that the actual air intake of the air inlet is not less than the minimum safe air intake;

[0032] That is, the controller calculates the air suction priority of the air inlet according to the difference between the actual air intake volume and the minimum safe air intake volume. The higher the priority, the lower the actual air intake volume of the air inlet is than the minimum safe air intake volume, and the more it is necessary to ensure its air intake volume.

[0033] As a further improvement of the above solution, the controller adjusts the opening and closing angles of the movable plates in each control component in order of priority to increase the air intake until the minimum safe air intake is reached or the movable plates are fully opened;

[0034] After all the movable sheets have been adjusted, if the actual air intake of some suction units is still lower than the minimum safe air intake, the controller adjusts the operating state of the exhaust fan to increase its speed, or connects more exhaust fans to the grid, thereby increasing the total air volume, so that the actual air intake of each air inlet pipe reaches or exceeds the minimum safe air intake;

[0035] After all exhaust fans have been adjusted, if the actual air intake of some air inlet openings is still lower than the minimum safe air intake, the controller will send out an alarm signal to prompt the user to take emergency measures to prevent the risk of smoke backflow.

[0036] The technical effect of the above improvement is: by measuring the actual air intake volume of different suction pipe openings, arranging the priorities, and adjusting the movable plates and the main pipeline according to the order of priority, the air intake pipe openings with low air intake volume are adjusted to make the air intake volume of each part of the air intake pipe opening tend to be average, which will be more stable during smoke exhaust, avoid the situation of poor smoke exhaust, and thus avoid the situation of smoke backflow at some air intake pipe openings.

[0037] As a further improvement of the above scheme, in step 3, to ensure the normal and stable operation of the system, the uniformity of the system is calculated according to the difference between the actual air inlet volume and the ideal air inlet volume of each air inlet port, which is the sum of the squares of the difference between the actual air inlet volume and the ideal air inlet volume of each air inlet port divided by the number of each air inlet port, that is,

[0038]

[0039] Where n represents the number of air inlet ports, Q i represents the actual air volume of the i-th air inlet, Q i ′ represents the ideal air volume of the i-th air inlet;

[0040] When the uniformity of the system is less than the preset uniformity target value, the adjustment of the opening and closing angle of the movable sheet and the operating state of the exhaust fan is stopped, and the system enters a stable operating mode.

[0041] The technical effect of the above improvement is: by calculating the system average, the difference in air intake volume at the air inlets of each part of the entire system can be known, so that it can be intuitively judged whether the air intake volume at the air inlet of the entire system has been adjusted, and therefore it can be used as an indicator for the subsequent smooth operation of the entire system. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 It is a structural schematic diagram of the smoke exhaust pipe system in the present invention;

[0043] Figure 2 for Figure 1 A schematic diagram of the local enlarged structure at point A in the middle;

[0044] Figure 3 It is an abstract schematic diagram of the swing angle of the movable sheet in the present invention;

[0045] Figure 4 is a control flow chart of the first part of the control method of the present invention;

[0046] Figure 5 This is a control flow chart of the second part of the control method in the present invention.

[0047] In the figure: 10, main pipeline; 11, first branch pipe; 12, control component; 121, connecting box; 122, partition; 123, movable sheet; 13, second branch pipe; 14, suction hood; 15, exhaust fan; 16, sealing strip; 17, detector; 20, suction unit. DETAILED DESCRIPTION

[0048] In order to enable those skilled in the art to better understand the technical solution, the present invention is described in detail below in conjunction with embodiments. The description in this section is only exemplary and explanatory and should not have any limiting effect on the scope of protection of the present invention.

[0049] like Figure 1-2 As shown, the specific scheme of this embodiment is: a uniformly distributed smoke exhaust pipe system, including a main pipe 10, a plurality of exhaust fans 15 are connected to the air outlet end of the main pipe 10, and a plurality of suction units 20 for extracting smoke are symmetrically connected to each other on the main pipe 10. Figure 1 As shown, the dotted boxes on both sides of the main pipeline 10 are the suction units 20, and the suction units 20 are completely symmetrical, that is, the arrangement positions of the suction units 20 are symmetrical, and the various components in the suction units 20 are also arranged symmetrically with each other;

[0050] The suction unit 20 includes a first branch pipe 11 and a second branch pipe 13 which are arranged in a staggered manner to communicate with each other. Figure 1Taking the up, down, left, and right directions as an example, in this real-time embodiment, the first branch pipe 11 is arranged horizontally, the second branch pipe 13 is arranged vertically, the first branch pipe 11 and the second branch pipe 13 are arranged perpendicular to each other, a control component 12 is arranged between the first branch pipe 11 and the second branch pipe 13, the control component 12 controls the connection between the first branch pipe 11 and the second branch pipe 13, and the first branch pipe 11 or the second branch pipe 13 at both ends of the control component 12 are completely symmetrical. Specifically, in this embodiment, the control component 12 is taken as the center, and the length and diameter of the first branch pipe 11 or the second branch pipe 13 at both ends of the control component 12 are completely the same;

[0051] The first branch pipe 11 and the second branch pipe 13 are arranged in multiple stages, and both ends of the first branch pipe 11 or the second branch pipe 13 of the last stage are air inlet openings, and an air suction hood 14 is arranged at the air inlet opening. This arrangement can ensure that the distances between all the air inlet openings and the main pipe 10 are equal, and the diameters of the pipes are the same. Therefore, it can be ensured from the hardware that the air intake volume of the air inlet openings at various positions is the same. Therefore, when exhausting smoke, uniform smoke exhaust can be achieved to avoid the situation where some positions are exhausted normally while other positions cannot be exhausted.

[0052] like Figure 2 As shown, as a preferred embodiment of the above embodiment, the control component 12 includes a connecting box 121. In the present embodiment, the connecting box 121 is a cubic box body, and the connecting box 121 is respectively connected to the first branch pipe 11 and the second branch pipe 13. The connecting box 121 is also provided with a partition 122 for isolating the symmetrical air inlet ends on both sides of the connecting box 121. In the present embodiment, the partition 122 is specifically a partition plate, and is transitioned in a circular arc. Such a setting can avoid collision when the air inlet pipes on both sides of the connecting box 121 meet in the connecting box 121 when air is taken in at the same time, thereby reducing wind resistance during smoke exhaust.

[0053] like Figure 2 As shown, as a preferred embodiment of the above embodiment, a movable sheet 123 is rotatably provided on one side of the air outlet end of the connecting box 121, and the movable sheet 123 can selectively connect the air outlet end of the connecting box 121 with any air inlet end of the connecting box 121. In this embodiment, two movable sheets 123 are provided, which respectively correspond to the connection of the pipes on both sides of the control component 12;

[0054] A driving source for driving the movable piece 123 to rotate is fixedly arranged on the outside of the connecting box 121. In the present embodiment, the driving source is a small motor, and the movable piece 123 is driven to rotate through a worm gear structure. The rotating shaft of the movable piece 123 and the worm gear shaft of the worm gear are fixedly transmitted to each other. Through the arranged movable piece 123, the size of the air inlet of different air inlet pipes can be adjusted, and the connection and closing of the air inlet pipes can be adjusted.

[0055] like Figure 2 As shown, as a preferred embodiment of the above embodiment, a sealing strip 16 in contact with the inner wall of the connecting box 121 is provided on the surface of the movable piece 123, and the sealing strip 16 is mainly used to prevent smoke from leaking from the gap between the movable piece 123 and the connecting box 121.

[0056] As a preferred embodiment of the above embodiment, detectors 17 for measuring smoke velocity are provided on both side walls of the partition 122. The detector 17 is mainly used to detect the smoke velocity to facilitate the actual measurement of the exhaust volume.

[0057] A uniformly distributed air supply pipe system includes all the components in the above-mentioned embodiment. The main difference is that the exhaust fan 15 is replaced by a hair dryer. After the hair dryer is started, air can be evenly blown into the first branch pipe 11 and the second branch pipe 13, so that the first branch pipe 11 and the second branch pipe 13 can achieve a uniform air supply effect.

[0058] Similarly, the exhaust fan 15 can be replaced by a water pump to achieve uniform water supply in the pipeline system.

[0059] Refer to the attached Figure 3 , 4 5. A control method for a uniformly distributed smoke exhaust pipe system, comprising a controller and a pipe system, wherein the controller is not shown in the accompanying drawings, and further comprising the following steps:

[0060] Step 1, preset preliminary air intake volume: start the exhaust fan 15, start exhaust and smoke exhaust, the controller obtains the number of air intake ports connected to the control component 12, and preliminarily calculates the total air volume in the main duct 10. In this embodiment, the total air volume is generally based on the air intake volume of one exhaust fan 15 when it is normally running at rated power, or is set according to actual needs; when all air intake ports start to intake air, the air intake volume of a single air intake port is preliminarily determined as:

[0061] Initial air intake = total air volume / number of air intake openings;

[0062] The number of air inlet openings = the number of control components 12 connected to the last stage × 2;

[0063] In this step, firstly, the preliminary air intake volume of each air inlet port is calculated according to the total air volume. The sum of the preliminary air intake volumes of each air inlet port is theoretically the total air volume. This is mainly because in the present application, all the air extraction units, as well as the first branch pipe 11 and the second branch pipe 13 in the air extraction unit are arranged in a completely symmetrical state. Therefore, when the wind resistance is negligible, the air intake volume of each air inlet port is equal.

[0064] Step 2: Calculate the actual air volume: The detector 17 detects the wind speed of the smoke and transmits the detected data to the controller. The controller performs calculations internally, and the actual smoke intake volume Q is:

[0065] Q = VA,

[0066] Wherein A represents the opening and closing hole area of ​​the movable sheet 123 in the connecting box 121, and V is the detected smoke velocity;

[0067] The calculation method of A is: A = l 1 × 2 ,

[0068] Please refer to the attached Figure 3 As shown, in this embodiment, l 1 represents the width of the movable sheet 123. Since the width of the movable sheet 123 is constant, l 2 The vertical distance between the movable sheet 123 and the end point of the intermediate partition 122 is indicated. Figure 3 h in the formula represents the effective width of smoke passing through, l 2 is related to the opening and closing angle θ of the movable sheet 123. When the opening and closing angle θ increases, l 2 becomes larger, so it can be abstracted as shown in the following Figure 3 In the triangle OPQ, point O represents the rotation center point of the movable sheet 123, point P represents the contact point between the movable sheet 123 and the partition 122, and point Q represents the end point of the movable sheet 123, so the value of h is obtained by solving the trigonometric function;

[0069] Step 3: Feedback and adjustment: The controller compares the actual air intake volume data obtained by calculation with the preliminary air intake volume;

[0070] When the actual air intake volume is greater than the preliminary air intake volume, the controller adjusts the opening and closing angle of the movable sheet 123 to reduce the air intake volume to the preliminary air intake volume;

[0071] When the actual air intake is less than the initial air intake, the controller controls the speed of the exhaust fan 15 to increase, or more exhaust fans 15 are connected to the grid to provide a greater suction force, thereby achieving the initial air intake. In this embodiment, the initial air intake is only used as a non-limiting standard in the smoke exhaust process, that is, in actual operation, the initial air intake needs to meet the normal smoke exhaust effect, and is preset according to the actual situation during use.

[0072] As a preferred embodiment of the above embodiment, in step 3, in order to avoid smoke backflow, it is preferred to ensure that the actual air intake volume of the air inlet pipe is not less than the minimum safe air intake volume;

[0073] That is, the controller calculates the air suction priority of the air inlet according to the difference between the actual air intake volume and the minimum safe air intake volume. The higher the priority, the lower the actual air intake volume of the air inlet is than the minimum safe air intake volume, and the more it is necessary to ensure its air intake volume.

[0074] In this embodiment, the controller adjusts the opening and closing angles of the movable pieces 123 in each control component 12 in order of priority to increase the air intake until the minimum safe air intake is reached or the movable piece 123 is fully opened;

[0075] At the same time, in order to make the actual air intake volume of the air inlet pipe reach the ideal air intake volume, when the actual air intake volume of the air inlet pipe reaches the minimum safe air intake volume, the air intake volume is still adjusted by confirming the priority to ensure that the ideal air intake volume can be achieved.

[0076] Specifically, after all the movable pieces 123 are adjusted, if the actual air intake of some suction units 20 is still lower than the minimum safe air intake, the controller will adjust the operating state of the exhaust fan 15 to increase its rotation speed, or connect more exhaust fans 15 to the grid, thereby increasing the total air volume, so that the actual air intake of each air inlet port reaches or exceeds the minimum safe air intake;

[0077] After all exhaust fans 15 are adjusted, if the actual air intake of some air inlet openings is still lower than the minimum safe air intake, the controller will send out an alarm signal to prompt the user to take emergency measures to prevent the risk of smoke backflow.

[0078] As a preferred method of the above embodiment, in step 3, to ensure the normal and stable operation of the system, the uniformity of the system is calculated based on the difference between the actual air intake volume of each air inlet opening and the ideal air intake volume, where the so-called ideal air intake volume is the preset preliminary air intake volume of the air inlet opening, and the square sum of the difference between the actual air intake volume of each air inlet opening and the ideal air intake volume is divided by the number of each air inlet opening, that is,

[0079]

[0080] Where n represents the number of air inlet ports, Q i represents the actual air volume of the i-th air inlet, Q i ′ represents the ideal air volume of the i-th air inlet;

[0081] When the uniformity of the system is less than the preset uniformity target value, it means that the air inlet volumes of the air inlet ports in the system are not much different and the air inlet volumes of the air inlet ports are uniform. At this time, the adjustment of the opening and closing angle of the movable sheet 123 and the operating state of the exhaust fan 15 is stopped, and the system enters a stable operating mode.

[0082] For example: There are 5 air inlet ports, and the ideal air volume is set to 500m3 / h, the ideal uniformity is 50, and the actual measured air inlet volume of No. 1, 2, 3, 4, and 5 pipes is 480m 3 / h、470m 3 / h、460m 3 / h、500m 3 / h、510m 3 / h; the actual uniformity is:

[0083]

[0084] It can be seen that the difference between the air intake volume of each pipe opening at this time and the ideal air intake volume is still relatively large, so it is necessary to continue to adjust the opening and closing angle of the movable plate 123 and the operating state of the exhaust fan 15 to achieve the appropriate air intake volume; at the same time, according to the difference between the ideal air intake volume and the actual air intake volume, the adjustment priority order is determined to be: 3, 2, 1, 5, 4, and adjustments are made in this order. In addition, in order to adapt to actual needs, during the adjustment of the first-level pipe opening, the other second-level pipe openings will be adjusted synchronously, and the adjustment range will decrease with the priority order until no adjustment is made.

[0085] It should be noted that, in this article, the terms include, contain or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. Specific examples are used in this article to illustrate the principle and implementation of the technical solution of the present invention. The above examples are only used to help understand the method of the present invention and its core idea. The above are only preferred implementations of the present invention. It should be pointed out that due to the limitations of textual expression and the objective existence of infinite specific structures, for ordinary technicians in this technical field, without departing from the principle of the present invention, several improvements, modifications or changes can be made, and the above technical features can also be combined in an appropriate manner; these improvements, modifications, changes or combinations, or the direct application of the concept and technical solution of the invention to other occasions without improvement, should be regarded as the protection scope of the present invention.

Claims

1. A uniformly distributed smoke exhaust duct system, characterized in that: It comprises a main pipeline (10), the air outlet end of the main pipeline (10) is connected to a plurality of exhaust fans (15), and the main pipeline (10) is symmetrically connected to a plurality of suction units (20) for extracting smoke; The suction unit (20) comprises a first branch pipe (11) and a second branch pipe (13) which are arranged in a staggered manner and in communication with each other, a control component (12) is arranged between the first branch pipe (11) and the second branch pipe (13), the control component (12) controls the communication between the first branch pipe (11) and the second branch pipe (13), and the first branch pipe (11) or the second branch pipe (13) located at both ends of the control component (12) are symmetrical to each other; The first branch pipe (11) and the second branch pipe (13) are arranged in multiple stages, and both ends of the first branch pipe (11) or the second branch pipe (13) of the last stage are air inlet openings, and an air suction hood (14) is provided at the air inlet opening.

2. A uniformly distributed smoke exhaust duct system according to claim 1, characterized in that The control component (12) comprises a connecting box (121), the connecting box (121) being connected to the first branch pipe (11) and the second branch pipe (13) respectively, and a partition (122) is also provided in the connecting box (121) for isolating the air inlet ends symmetrically on both sides of the connecting box (121).

3. The evenly distributed smoke exhaust duct system according to claim 2, characterized in that: A movable sheet (123) is rotatably provided on one side of the air outlet end of the connecting box (121), and the movable sheet (123) can selectively connect the air outlet end of the connecting box (121) with any air inlet end of the connecting box (121); A driving source for driving the movable sheet (123) to rotate is fixedly arranged on the outer side of the connecting box (121).

4. The evenly distributed smoke exhaust duct system according to claim 3, characterized in that: A sealing strip (16) in contact with the inner wall of the connecting box (121) is arranged on the surface of the movable sheet (123), and detectors (17) for measuring smoke velocity are arranged on both side walls of the partition (122).

5. A uniformly distributed gas supply pipeline system, characterized in that: The exhaust fan (15) described in any one of claims 1 to 4 is replaced by a hair dryer.

6. A control method for a uniformly distributed smoke exhaust duct system, characterized in that: The method comprises a controller and the pipeline system of claim 4, further comprising the following steps: Step 1, preset preliminary air intake volume: start the exhaust fan (15) to start exhausting air and smoke, the controller obtains the number of air intake ports connected to the control component (12), and preliminarily calculates the total air volume in the main pipeline (10); when all the air intake ports start to intake air, the air intake volume of a single air intake port is preliminarily determined as: Initial air intake = total air volume / number of air intake ports; Step 2: Calculate the actual air volume: The detector (17) detects the air velocity of the smoke to be drawn and transmits the detected data to the controller. The controller performs calculations internally, and the actual air volume Q of the smoke drawn is: Q = VA, Wherein A represents the opening and closing hole area of ​​the movable sheet (123) in the connecting box (121), and V represents the detected smoke velocity; The calculation method of A is: A = l1 × l2, l1 represents the width of the movable sheet (123), l2 represents the vertical distance between the movable sheet (123) and the end points of the partition (122) arranged in the middle, and l2 is related to the opening and closing angle of the movable sheet (123) and is obtained by solving trigonometric functions; Step 3: Feedback and adjustment of actual air intake volume: The controller compares the actual air intake volume data obtained by calculation with the preliminary air intake volume; When the actual air intake volume is greater than the preliminary air intake volume, the controller adjusts the opening and closing angle of the movable sheet (123) so that the air intake volume drops to the preliminary air intake volume; When the actual air intake volume is less than the initial air intake volume, the controller controls the speed of the exhaust fan (15) to increase, or more exhaust fans (15) are connected to the grid to provide a greater suction force, thereby achieving the initial air intake volume.

7. A control method for a uniformly distributed smoke exhaust duct system according to claim 6, characterized in that: In step 3, to avoid smoke backflow, it is preferred to ensure that the actual air intake volume of the air inlet is not less than the minimum safe air intake volume; That is, the controller calculates the air suction priority of the air inlet according to the difference between the actual air intake volume and the minimum safe air intake volume. The higher the priority, the lower the actual air intake volume of the air inlet is than the minimum safe air intake volume, and the more it is necessary to ensure its air intake volume.

8. The control method of a uniformly distributed smoke exhaust duct system according to claim 7, characterized in that: The controller adjusts the opening and closing angles of the movable plates (123) in each control assembly (12) in sequence according to the order of priority, so as to increase the air intake, until the minimum safe air intake is reached or the movable plates (123) are fully opened; After all the movable plates (123) have been adjusted, if the actual air intake of some of the suction units (20) is still lower than the minimum safe air intake, the controller adjusts the operating state of the exhaust fan (15) to increase its rotation speed, or connects more exhaust fans (15) to the grid, thereby increasing the total air volume and making the actual air intake of each air intake pipe reach or exceed the minimum safe air intake; After all exhaust fans (15) have been adjusted, if the actual air intake volume of some air inlet openings is still lower than the minimum safe air intake volume, the controller sends out an alarm signal to prompt the user to take emergency measures to prevent the risk of smoke backflow.

9. The control method of a uniformly distributed smoke exhaust duct system according to claim 6, characterized in that: In step 3, to ensure the normal and stable operation of the system, the uniformity of the system is calculated based on the difference between the actual air inlet volume and the ideal air inlet volume of each air inlet opening, which is the sum of the squares of the difference between the actual air inlet volume and the ideal air inlet volume of each air inlet opening divided by the number of each air inlet opening, that is, Where n represents the number of air inlet ports, Q i represents the actual air volume of the i-th air inlet, Q i ′ represents the ideal air volume of the i-th air inlet; When the uniformity of the system is less than a preset uniformity target value, the adjustment of the opening and closing angle of the movable sheet (123) and the operating state of the exhaust fan (15) is stopped, and the system enters a stable operating mode.

Images