An analog air volume control system suitable for mechanical ventilation conditions

Abstract

The present invention relates to the field of ventilation technology, and discloses an analog air volume control system suitable for mechanical ventilation working conditions, including an electric air valve frame, a raised box fixedly installed on the top of the electric air valve frame, a fixed bracket fixedly installed on the top of the raised box, and an analog actuator host fixedly installed on the top of the fixed bracket; a air valve stem is rotatably connected through the center of the electric air valve frame, and an air valve leaf is arranged on the air valve stem. The disc-shaped aluminum core is driven to rotate by the analog actuator host, driving the air valve stem to rotate, and the turntable is located at the side wall of the inclined groove to squeeze the sliding column, driving the sliding plate to slide between the two clamping plates, and the guide groove 2 is connected to the guide groove 1, and the air can pass through the overlapping part of the guide groove 2 and the guide groove 1 and the flow channel between the two sliding plates; when the guide groove 2 and the guide groove 1 are completely overlapped, the air volume reaches the maximum; thereby achieving the purpose of arbitrarily adjusting the opening size of the electric air valve and high flexibility.

Description

Technical Field

[0001] The invention relates to the technical field of ventilation, and in particular to an analog air volume control system suitable for mechanical ventilation working conditions. Background Art

[0002] Mechanical ventilation plays an important role in modern building design. It can discharge the low-temperature or high-temperature turbid air inside the building to the outside, and then replenish the fresh air into the room after temperature and humidity treatment, so as to ensure the thermal comfort of indoor personnel and make the indoor air environment quality meet the hygiene standards. In addition, mechanical ventilation can also effectively remove harmful gases and microorganisms in the room, reducing the harm of air pollution to human health. Therefore, the use of mechanical ventilation methods is a necessary condition in the construction process of modern buildings.

[0003] As we all know, building energy consumption is one of the main sources of greenhouse gas emissions. In recent years, the scale of my country's construction industry has continued to expand. In 2020, China's building construction and operation energy consumption accounted for 32% of the total social energy consumption, of which building construction accounted for 13% and building operation accounted for 19%. Mechanical ventilation energy consumption accounts for more than 20% of the total building energy consumption, which has great potential for saving.

[0004] Under mechanical ventilation conditions, the switch quantity adjustment method is currently often used to control the electric air valve in the air volume control system. When this method is used, the air valve only has two states: fully open and fully closed, and cannot be stopped in the middle state. When the air valve is fully open, the air volume is maximum, and when the air valve is fully closed, the air volume is zero. Indoor operators cannot adjust the air volume at will according to demand, and thus cannot effectively control the temperature, which is not only not conducive to actual production, but also the physical quality and thermal comfort of indoor personnel are poor. In addition, due to the poor flexibility of this adjustment method, it will greatly increase the energy consumption of the air volume control system during operation. Summary of the invention

[0005] 1. Technical issues to be resolved

[0006] In view of the deficiencies in the prior art, the present invention provides an analog air volume control system suitable for mechanical ventilation conditions, which has the advantages of arbitrarily adjusting the opening size of the electric air valve and high flexibility, thus solving the problem that the air volume cannot be adjusted arbitrarily according to demand.

[0007] (II) Technical solution

[0008] In order to achieve the above-mentioned purpose of arbitrarily adjusting the opening size of the electric air valve with high flexibility, the present invention provides the following technical solutions: an analog air volume control system suitable for mechanical ventilation conditions, comprising an electric air valve frame, an air outlet duct section is fixedly installed on the front end of the electric air valve frame by bolts, an air inlet duct section is fixedly installed on the rear end of the electric air valve frame by bolts, an elevated box is fixedly installed on the top of the elevated box, a fixed bracket is fixedly installed on the top of the fixed bracket, and an analog actuator host is fixedly installed on the top of the fixed bracket; a air valve stem is rotatably connected through the center of the electric air valve frame, an air valve stem is provided with an air valve leaf, and a rotation limiter is fixedly installed on the top of the analog actuator host.

[0009] Preferably, the top array of the fixing bracket is provided with mounting holes, and the analog actuator host is fixedly mounted at the mounting holes of the fixing bracket by means of bolts.

[0010] Preferably, a disc-shaped aluminum core is provided on the right side of the analog actuator host, the air valve stem is fixedly installed at the center of the disc-shaped aluminum core, an external cable is connected to the left side of the analog actuator host, and a manual button is provided on the top of the analog actuator host.

[0011] Preferably, the air valve blade includes two turntables fixedly mounted on the air valve stem, the two turntables are respectively attached to the top wall and the bottom wall of the electric air valve frame, the top wall and the bottom wall of the electric air valve frame are both fixedly mounted with two pads, the two pads are respectively attached to the left and right sides of the turntable, and two inclined grooves are arranged in an array on the opposite sides of the two turntables; two clamping plates are fixedly mounted on the left and right side walls of the electric air valve frame, a guide groove 1 is arranged through the surface array of the clamping plate, a sliding plate is clamped between the two clamping plates, a guide groove 2 is arranged through the surface array of the sliding plate, sliding columns are fixedly mounted on the top and the bottom of the sliding plate, and the sliding columns are slidably connected in the inclined groove.

[0012] Preferably, the width of the guide groove one is equal to the array spacing thereof, the width of the guide groove two is equal to the array spacing thereof, and the width and length of the guide groove one and the guide groove two are equal.

[0013] Preferably, the two sliding plates have opposite sides that are arc-shaped and fit on the surface of the air valve stem, and the clamping plate is fixedly installed between the upper and lower pads.

[0014] Preferably, the rotation limiter includes a support plate fixedly mounted on the top right end of the analog actuator host, the support plate has an inverted L-shaped cross-section, two guide rods are fixedly mounted on the top of the support plate, and a support plate is fixedly mounted on the top of the two guide rods. An avoidance groove is provided through the top of the support plate, and the avoidance groove is located between the two guide rods; a cylinder is fixedly mounted on the top of the support plate, and the output end of the cylinder passes through the support plate, and a slide seat is fixedly mounted on the output end of the cylinder, and the slide seat is slidably connected to the guide rod, and a plurality of sleeves are fixedly mounted on the bottom of the slide seat, and a sliding rod is slidably connected to the bottom of the sleeve, a spring is fixedly mounted between the top of the sliding rod and the inner wall of the sleeve, and a friction plate is fixedly mounted on the bottom of the sliding rod, and the friction plate is attached to the top of the disc-shaped aluminum core.

[0015] Preferably, the external cable includes a negative electrode terminal, a positive electrode terminal, a voltage control signal terminal and a current control signal terminal.

[0016] (III) Beneficial effects

[0017] Compared with the prior art, the present invention provides an analog air volume control system suitable for mechanical ventilation conditions, which has the following beneficial effects:

[0018] 1. The analog air volume control system suitable for mechanical ventilation conditions drives the disc-shaped aluminum core to rotate through the analog actuator host, drives the air valve stem to rotate, and the turntable rotates synchronously with the air valve stem. The turntable is located at the side wall of the inclined groove to squeeze the sliding column, driving the sliding plate to slide between the two clamping plates. The guide groove 2 is connected with the guide groove 1, and the air can pass through the overlapping part of the guide groove 2 and the guide groove 1 and the flow channel between the two sliding plates; and as the distance of the sliding plate moves, the overlapping part of the guide groove 2 and the guide groove 1 increases, and the distance between the two sliding plates increases. When the guide groove 2 and the guide groove 1 completely overlap, the air volume reaches the maximum; thereby achieving the purpose of arbitrarily adjusting the opening size of the electric air valve with high flexibility.

[0019] 2. This analog air volume control system is suitable for mechanical ventilation conditions. It is also suitable for DC0-10V voltage signals and DC4-20mA current signals. It can be used with a variety of signal generating devices and has a wide range of applications.

[0020] 3. This analog air volume control system is suitable for mechanical ventilation conditions. It is easy to operate and has high control accuracy. For DC0-10V voltage signal, the voltage range of 0-10V corresponds to the opening range of 0-100% and is proportional to it. For DC4-20mA current signal, the current range of 4-20mA corresponds to the opening range of 0-100% and is proportional to it.

[0021] 4. This analog air volume control system is suitable for mechanical ventilation conditions. By adjusting the opening angle of the electric air valve, the air volume passing through the air valve can be controlled at will, reducing unnecessary energy consumption of the control system during actual operation. The wind speed at the air outlet can be accurately controlled, the indoor temperature and humidity can be adjusted, and the physical quality and thermal comfort of indoor staff can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic diagram of the three-dimensional structure of an analog air volume control system suitable for mechanical ventilation conditions proposed by the present invention;

[0023] Figure 2 This is a schematic diagram of the three-dimensional structure of an analog air volume control system suitable for mechanical ventilation conditions proposed by the present invention after removing the air outlet duct section and the air inlet duct section;

[0024] Figure 3 A schematic diagram of the three-dimensional structure above the electric air valve frame of an analog air volume control system suitable for mechanical ventilation conditions proposed by the present invention;

[0025] Figure 4 A schematic diagram of the three-dimensional structure of a damper blade of an analog air volume control system suitable for mechanical ventilation working conditions proposed by the present invention;

[0026] Figure 5 A schematic diagram of a three-dimensional exploded structure of a damper blade of an analog air volume control system suitable for mechanical ventilation conditions proposed by the present invention;

[0027] Figure 6 A schematic diagram of the three-dimensional structure of a rotation limiter of an analog air volume control system suitable for mechanical ventilation working conditions proposed by the present invention;

[0028] Figure 7 This is a schematic diagram of the external cable structure of an analog air volume control system suitable for mechanical ventilation conditions proposed by the present invention.

[0029] In the figure: 100, electric damper frame; 200, outlet air duct section; 300, inlet air duct section; 400, height box; 500, fixed bracket; 600, analog actuator host; 700, damper stem; 800, damper leaf; 900, rotation limiter; 601, disc-shaped aluminum core; 602, external cable; 603, manual button; 801, turntable; 802, pad; 803, inclined slot; 804, clamping plate; 805, guide slot one; 806, sliding plate; 807, guide groove two; 808, sliding column; 901, supporting plate; 902, guide rod; 903, supporting plate; 904, avoidance groove; 905, cylinder; 906, sliding seat; 907, sleeve; 908, sliding rod; 909, spring; 910, friction plate; 6021, negative terminal; 6022, positive terminal; 6023, voltage control signal terminal; 6024, current control signal terminal. DETAILED DESCRIPTION

[0030] In the description of the present application, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] See also Figure 1-Figure 2, an analog air volume control system suitable for mechanical ventilation working conditions, including an electric air valve frame 100, an outlet air duct section 200 is fixedly installed at the front end of the electric air valve frame 100 by bolts, an inlet air duct section 300 is fixedly installed at the rear end of the electric air valve frame 100 by bolts, and both ends of the electric air valve frame 100 are respectively connected to the outlet air duct section 200 and the inlet air duct section 300 by common plate flanges and fixed by bolts. An elevated box 400 is fixedly installed on the top of the electric air valve frame 100, a fixed bracket 500 is fixedly installed on the top of the elevated box 400, and an analog actuator host 600 is fixedly installed on the top of the fixed bracket 500, which can reduce the influence of high temperature or low temperature gas inside the electric air valve frame 100 on the analog actuator host 600 under certain special working conditions. In addition, for some circular air valves and air valves with smaller sizes, the elevated box 400 can also provide an installation plane for the analog actuator host 600. The top of the fixed bracket 500 is provided with mounting holes in an array, and the analog actuator host 600 is fixedly installed at the mounting holes of the fixed bracket 500 by bolts. The operator can select a suitable hole position to fix the analog actuator host 600. The center of the electric damper frame 100 is rotatably connected with a damper stem 700, on which a damper leaf 800 is provided, and a rotation limiter 900 is fixedly installed on the top of the analog actuator host 600.

[0033] See also Figure 3 and Figure 7, a disc-shaped aluminum core 601 is arranged on the right side of the analog actuator host 600, the air valve stem 700 is fixedly installed at the center of the disc-shaped aluminum core 601, an external cable 602 is connected to the left side of the analog actuator host 600, and a manual button 603 is arranged on the top of the analog actuator host 600. Press the manual button 603 on the analog actuator host 600, the internal gear of the analog actuator host 600 is unlocked, and manual operation can be performed. Before power-on operation, this function can be used for manual debugging to prevent installation errors. In addition, in actual operation, if a power outage occurs and maintenance is required, this function can also be used to achieve manual operation. The external cable 602 includes a negative terminal 6021, a positive terminal 6022, a voltage control signal terminal 6023, and a current control signal terminal 6024. When the analog actuator is actually running, the negative terminal 6021 and the positive terminal 6022 need to be connected as power supply. The analog actuator host 600 can identify DC0-10V signal or DC4-20mA signal at the same time. The value of the signal will determine the opening size of the valve. If the DC0-10V signal is selected, the DC0-10V voltage control signal terminal 6023 needs to be connected. 0V and 10V correspond to the closed state and open state of the valve respectively, and the voltage range of 0-10V corresponds to the opening range of 0-100% of the air valve and is proportional. If the DC4-20mA signal is selected, the DC4-20mA current control signal terminal 6024 needs to be connected. 4mA and 20mA correspond to the closed state and open state of the valve respectively, and the current range of 4-20mA corresponds to the opening range of 0-100% of the air valve and is proportional.

[0034] See also Figure 4 and Figure 5 The air valve blade 800 includes two turntables 801 fixedly mounted on the air valve stem 700. The two turntables 801 are respectively attached to the top wall and the bottom wall of the electric air valve frame 100. The top wall and the bottom wall of the electric air valve frame 100 are both fixedly mounted with two pads 802. The two pads 802 are respectively attached to the left and right sides of the turntable 801. Two inclined grooves 803 are arranged in an array on the opposite sides of the two turntables 801.

[0035] Two clamping plates 804 are fixedly installed on the left and right side walls of the electric damper frame 100. The clamping plates 804 are fixedly installed between the upper and lower pads 802. A sliding plate 806 is clamped between the two clamping plates 804. The two sliding plates 806 have arc-shaped surfaces on opposite sides and fit on the surface of the damper stem 700. Thus, the electric damper frame 100 is spaced by the cooperation of the rotating disk 801, the pad 802, the clamping plates 804 and the sliding plates 806 to prevent airflow from passing through the electric damper frame 100. Sliding columns 808 are fixedly installed on the top and bottom of the sliding plates 806, and the sliding columns 808 are slidably connected in the inclined grooves 803. When the damper stem 700 rotates, the pad 802 rotates, and the pad 802 is located at the side wall of the inclined groove 803 to squeeze the sliding column 808, thereby driving the sliding plate 806 to slide between the two clamping plates 804, and a flow channel is formed between the two clamping plates 804, so that the airflow can pass through the two sliding plates 806. By adjusting the distance between the two sliding plates 806, the width of the flow channel through which the airflow can pass is adjusted.

[0036] The surface array of the clamping plate 804 is penetrated by a guide groove 1 805, and the surface array of the sliding plate 806 is penetrated by a guide groove 2 807. The width of the guide groove 1 805 is equal to the array spacing, the width of the guide groove 2 807 is equal to the array spacing, and the width and length of the guide groove 1 805 and the guide groove 2 807 are equal. Therefore, at the beginning, the guide groove 1 805 and the guide groove 2 807 are staggered, the guide groove 1 805 is sealed by the sliding plate 806, and the guide groove 2 807 is sealed by the clamping plate 804, thereby preventing air from passing through the electric damper frame 100;

[0037] When the sliding plate 806 slides relative to the clamping plate 804, the guide groove 1 805 and the guide groove 2 807 overlap a portion, and air can pass through the overlapping portion of the guide groove 1 805 and the guide groove 2 807. Until the guide groove 1 805 and the guide groove 2 807 completely overlap, the air volume is maximum at this time.

[0038] See also Figure 6The rotation limiter 900 includes a support plate 901 fixedly mounted on the top of the right end of the analog actuator host 600. The cross section of the support plate 901 is inverted L-shaped. The air valve stem 700 is connected to the horizontal part of the support plate 901 through rotation. Two guide rods 902 are fixedly mounted on the top of the support plate 901, and a support plate 903 is fixedly mounted on the top of the two guide rods 902. A avoidance groove 904 is opened through the top of the support plate 901, and the avoidance groove 904 is located between the two guide rods 902. A cylinder 905 is fixedly mounted on the top of the support plate 903. The output end of the cylinder 905 passes through the support plate 903. A slide 906 is fixedly mounted on the output end of the cylinder 905. The slide 906 is slidably connected to the guide rod 902, and the slide 906 is guided by the guide rod 902. A plurality of sleeves 907 are fixedly mounted on the bottom of the slide 906, and the sleeves 907 pass through the avoidance groove 904.

[0039] The bottom of the sleeve 907 is slidably connected with a sliding rod 908, a spring 909 is fixedly installed between the top of the sliding rod 908 and the inner wall of the sleeve 907, and a friction plate 910 is fixedly installed at the bottom of the sliding rod 908, and the friction plate 910 is attached to the top of the disc-shaped aluminum core 601. Due to the elasticity of the spring 909, the sliding rod 908 and the friction plate 910 have a tendency to move downward relative to the sleeve 907. And through the extension of the output end of the cylinder 905, the friction plate 910 is attached to the upper surface of the disc-shaped aluminum core 601. As the output end of the cylinder 905 continues to extend, the spring 909 is compressed to increase the distance, and the extrusion force between the friction plate 910 and the disc-shaped aluminum core 601 is gradually increased, so that the friction between the friction plate 910 and the disc-shaped aluminum core 601 inhibits the rotation of the disc-shaped aluminum core 601 and the air valve stem 700.

[0040] When in use, the output end of the cylinder 905 contracts, driving the slide 906 to move upward, so that the friction plate 910 is separated from the disc-shaped aluminum core 601, so that the disc-shaped aluminum core 601 and the air valve stem 700 can rotate freely;

[0041] Then, the analog actuator host 600 drives the disc-shaped aluminum core 601 to rotate, driving the air valve stem 700 to rotate, and the turntable 801 rotates synchronously with the air valve stem 700. The turntable 801 is located at the side wall of the inclined groove 803 to squeeze the sliding column 808, driving the sliding plate 806 to slide between the two clamping plates 804, and the guide groove 807 is connected to the guide groove 1 805. The air can pass through the overlapping part of the guide groove 807 and the guide groove 1 805 and the flow channel between the two sliding plates 806;

[0042] As the moving distance of the sliding plate 806 increases, the overlapping portion of the guide groove 2 807 and the guide groove 1 805 increases, and the distance between the two sliding plates 806 increases. When the guide groove 2 807 and the guide groove 1 805 completely overlap, the air volume reaches a maximum.

[0043] Finally, the output end of the cylinder 905 is extended, the spring 909 is compressed to increase the distance, and the extrusion force between the friction plate 910 and the disc-shaped aluminum core 601 is gradually increased, thereby suppressing the rotation of the disc-shaped aluminum core 601 and the air valve stem 700 through the friction force between the friction plate 910 and the disc-shaped aluminum core 601.

[0044] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An analog air volume control system suitable for mechanical ventilation conditions, comprising an electric air valve frame (100), characterized in that: An air outlet duct section (200) is fixedly installed at the front end of the electric damper frame (100) by means of bolts, an air inlet duct section (300) is fixedly installed at the rear end of the electric damper frame (100) by means of bolts, a raised box (400) is fixedly installed at the top of the electric damper frame (100), a fixed bracket (500) is fixedly installed at the top of the raised box (400), and an analog actuator host (600) is fixedly installed at the top of the fixed bracket (500); A damper stem (700) is rotatably connected to the center of the electric damper frame (100), a damper leaf (800) is arranged on the damper stem (700), and a rotation limiter (900) is fixedly mounted on the top of the analog actuator host (600).

2. The analog air volume control system suitable for mechanical ventilation conditions according to claim 1, characterized in that: The top of the fixing bracket (500) is provided with mounting holes in an array, and the analog actuator host (600) is fixedly mounted on the mounting holes of the fixing bracket (500) by means of bolts.

3. The analog air volume control system suitable for mechanical ventilation conditions according to claim 1, characterized in that: A disc-shaped aluminum core (601) is arranged on the right side of the analog actuator main unit (600), the air valve stem (700) is fixedly installed at the center of the disc-shaped aluminum core (601), an external cable (602) is connected to the left side of the analog actuator main unit (600), and a manual button (603) is arranged on the top of the analog actuator main unit (600).

4. The analog air volume control system suitable for mechanical ventilation conditions according to claim 1, characterized in that: The damper blade (800) comprises two rotating disks (801) fixedly mounted on the damper stem (700); the two rotating disks (801) are respectively attached to the top wall and the bottom wall of the electric damper frame (100); the top wall and the bottom wall of the electric damper frame (100) are both fixedly mounted with two pads (802); the two pads (802) are respectively attached to the left and right sides of the rotating disk (801); and two inclined grooves (803) are arranged in an array on opposite sides of the two rotating disks (801); Two clamping plates (804) are fixedly installed on the left and right side walls of the electric air valve frame (100), and the surfaces of the clamping plates (804) are provided with a first flow guide groove (805) in an array, and a sliding plate (806) is clamped between the two clamping plates (804), and the surfaces of the sliding plates (806) are provided with a second flow guide groove (807) in an array, and sliding columns (808) are fixedly installed on the top and bottom of the sliding plates (806), and the sliding columns (808) are slidably connected in the inclined groove (803).

5. The analog air volume control system suitable for mechanical ventilation conditions according to claim 4, characterized in that: The width of the guide groove one (805) is equal to the array spacing, the width of the guide groove two (807) is equal to the array spacing, and the width and length of the guide groove one (805) and the guide groove two (807) are equal.

6. The analog air volume control system suitable for mechanical ventilation conditions according to claim 4, characterized in that: The opposite sides of the two sliding plates (806) are both arc-shaped surfaces and fit on the surface of the air valve stem (700). The clamping plate (804) is fixedly installed between the upper and lower pads (802).

7. The analog air volume control system suitable for mechanical ventilation conditions according to claim 3 is characterized in that: The rotation limiting member (900) comprises a support plate (901) fixedly mounted on the top of the right end of the analog actuator host (600); the cross section of the support plate (901) is in an inverted L shape; two guide rods (902) are fixedly mounted on the top of the support plate (901); a support plate (903) is fixedly mounted on the top of the two guide rods (902); an avoidance groove (904) is formed through the top of the support plate (901); and the avoidance groove (904) is located between the two guide rods (902); A cylinder (905) is fixedly mounted on the top of the support plate (903), and the output end of the cylinder (905) passes through the support plate (903). A slide seat (906) is fixedly mounted on the output end of the cylinder (905), and the slide seat (906) is slidably connected to the guide rod (902). A plurality of sleeves (907) are fixedly mounted on the bottom of the slide seat (906), and a sliding rod (908) is slidably connected to the bottom of the sleeve (907). A spring (909) is fixedly mounted between the top of the sliding rod (908) and the inner wall of the sleeve (907), and a friction plate (910) is fixedly mounted on the bottom of the sliding rod (908), and the friction plate (910) is attached to the top of the disc-shaped aluminum core (601).

8. The analog air volume control system suitable for mechanical ventilation conditions according to claim 3, characterized in that: The external cable (602) comprises a negative electrode connection terminal (6021), a positive electrode connection terminal (6022), a voltage control signal connection terminal (6023) and a current control signal connection terminal (6024).

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