Automatic opening and closing tuyere suitable for small space environment

Abstract

The invention relates to the technical field of air valves, and provides an automatic opening and closing air port suitable for a small space environment, which comprises an air box mounted at the opening part of an air pipe, a first air hole is formed in the outer end of the air box, a second air hole is formed in the inner end of the air box, a sealing plate is arranged in the air box, and the sealing plate is connected with a driving assembly used for enabling the sealing plate to be close to or far away from the first air hole; the first air hole is closed or opened; a rotating shaft is arranged in the sealing plate in a penetrating mode, a gear is fixedly connected to the rotating shaft, sliding grooves are formed in the positions, on the two opposite sides of the gear, of the sealing plate respectively, racks meshed with the gear are arranged in the sliding grooves, one end of the rotating shaft stretches into the first air hole so that the racks can stretch out of the sealing plate by rotating the rotating shaft, and clamping grooves capable of being matched with the ends of the racks are formed in the side wall of the air box. And after the sealing plate is manually extruded to open the first air hole, the position of the sealing plate is limited. Opening and closing of the air duct can be achieved through manual operation after power failure, and the use hidden danger caused by the fact that an existing automatic opening and closing air port cannot work due to power failure is eliminated.

Description

Technical Field

[0001] The invention relates to the technical field of air valves, and in particular to an automatic opening and closing air vent suitable for a small space environment. Background Art

[0002] Electric dampers are used to keep the air duct closed and open it when necessary to supply or exhaust air. In small-space building environments such as underground laboratories, due to construction space limitations, air ducts can only be installed in corridors (to ensure maximum utilization of the space area), and the return air corridor space is also extremely small. Conventional electric dampers cannot be installed and used normally due to their large size. In order to achieve miniaturization, louvers are usually installed at the mouth of the air duct, and the opening or closing of the louvers is controlled by a motor and a connecting rod mechanism, thereby replacing conventional electric dampers. However, most automatic opening and closing vents cannot work properly after a power outage, which poses a hidden danger to use. Summary of the invention

[0003] The purpose of the present invention is to provide an automatic opening and closing air vent suitable for a small space environment, so as to solve the above-mentioned defects of the prior art.

[0004] The present invention is achieved through the following technical solutions:

[0005] An automatic opening and closing air vent suitable for a small space environment comprises an air box installed at the mouth of an air duct, a first air hole is arranged at the outer end of the air box, a second air hole is arranged at the inner end, a sealing plate is arranged inside the air box, and a driving component is connected to the sealing plate to make the sealing plate close to or away from the first air hole to close or open the first air hole;

[0006] A rotating shaft is passed through the inside of the sealing plate, and a gear is fixedly connected to the rotating shaft. The sealing plate is provided with a slide groove on each opposite side of the gear, and a rack meshing with the gear is provided in the slide groove. One end of the rotating shaft extends into the first air hole so that the rack can be extended out of the sealing plate by rotating the rotating shaft. A slot that can cooperate with the end of the rack is provided on the side wall of the air box to limit the position of the sealing plate after the sealing plate is manually squeezed to open the first air hole.

[0007] Optionally, the driving assembly includes an installation box, an electromagnet, a permanent magnet, a driving rod and a reset element. The installation box is fixedly arranged inside the wind box, the electromagnet is fixedly arranged at one end of the installation box close to the first wind hole, the driving rod can be slidably penetrated into the installation box and one end is fixedly connected to the sealing plate, the permanent magnet is slidably arranged in the installation box and fixedly connected to the driving rod, the magnetic force generated by the electromagnet when energized and the magnetic force of the permanent magnet repel each other, so as to drive the sealing plate away from the first wind hole through the permanent magnet, and the reset element is fixedly connected between the permanent magnet and the installation box, so as to reset the permanent magnet after the electromagnet is powered off, and drive the sealing plate to reset and close the first wind hole.

[0008] Optionally, a pair of air doors are slidably provided at the inner end of the second air hole for closing or opening the second air hole, and elastic elements are provided on the outer sides of the air doors so that the air doors maintain a tendency to open the second air hole;

[0009] A first wedge block is provided on the outer side of the damper, and a C-shaped connecting rod is fixedly connected to the end of the driving rod away from the sealing plate. A second wedge block is provided on the top of the C-shaped connecting rod. When the first air hole is closed, the second wedge block cooperates with the first wedge block to make the damper close the second air outlet and pull the elastic element. In the process of opening the first air hole, the second wedge block gradually separates from the first wedge block, and the damper opens the second air hole under the action of the elastic element.

[0010] Optionally, two guide rods passing through the damper are fixedly arranged in the wind box, the elastic element is sleeved on the guide rods, and one end of the elastic element is fixedly connected to the wind box, and the other end is fixedly connected to the damper.

[0011] Optionally, a guide rail cooperating with the air door is provided at the second air hole.

[0012] Optionally, both the reset element and the elastic element are springs.

[0013] Optionally, a decorative plate is detachably connected to the outer end of the first air hole, and a plurality of air holes are provided on the decorative plate.

[0014] Optionally, the sealing plate is provided with a recessed groove cooperating with the decorative plate, two opposite sides of the decorative plate are each provided with an elastic ball, and the side wall of the recessed groove is provided with a groove cooperating with the elastic ball.

[0015] Optionally, the wind box includes a box body and a cover plate, the cover plate is connected to the box body via a fastener, and the first air hole is arranged on the cover plate.

[0016] The technical solution of the present invention has at least the following advantages and beneficial effects: in the present invention, the louvers in the traditional automatic opening and closing air vents are eliminated, and the closing or opening of the air duct is achieved by moving the sealing plate, thereby simplifying the structure; in addition, a gear is provided inside the sealing plate, and a rack is provided on each opposite side of the gear, which can be pressed by pressing the sealing plate and rotating the gear to extend the rack and snap into the slot on the side wall of the wind box, thereby limiting the position of the sealing plate, that is, keeping the air duct open, and allowing the air duct to be opened and closed by manual operation even after a power outage, thereby eliminating the hidden danger of the existing automatic opening and closing air vents failing to work due to power outages. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A cross-sectional view of an automatic opening and closing air vent suitable for a small space environment provided by the present invention (air duct closed state);

[0018] Figure 2 for Figure 1 AA partial section view in;

[0019] Figure 3 A cross-sectional view of an automatic opening and closing air vent suitable for a small space environment provided by the present invention (air duct open state);

[0020] Figure 4 for Figure 1 Partial cross-sectional view of BB in;

[0021] Figure 5 for Figure 1 Partial cross-sectional view of CC in;

[0022] Figure markings: 1-wind box, 101-box body, 1011-second air hole, 1012-slot, 102-cover plate, 1021-first air hole, 2-sealing plate, 3-gear, 4-rack, 5-rotating shaft, 501-knob, 6-driving rod, 7-electromagnet, 8-permanent magnet, 9-resetting element, 10-installing box, 11-support rod, 12-C-type connecting rod, 13-second wedge block, 14-air door, 15-first wedge block, 16-elastic element, 17-guide rod, 18-guide rail, 19-decorative plate, 20-elastic ball. DETAILED DESCRIPTION

[0023] refer to Figure 1 and Figure 3 , an automatic opening and closing air vent suitable for a small space environment, comprising an air box 1. In actual application, the air box 1 is installed at the mouth of an air duct (not shown in the figure). The outer end of the air box 1 (i.e., the end close to the mouth of the air duct) is provided with a first air hole 1021, and the inner end is provided with a second air hole 1011. As an option, the first air hole 1021 and the second air hole 1011 are both designed to be rectangular. The air box 1 comprises a box body 101 and a cover plate 102. The cover plate 102 is connected to the box body 101 by fasteners (such as screws). The first air hole 1021 is provided on the cover plate 102. It is worth noting that the detachable cover plate 102 facilitates the disassembly and assembly of the internal parts of the air box 1.

[0024] A sealing plate 2 is provided inside the air box 1, and the sealing plate 2 is connected to a driving assembly for moving the sealing plate 2 close to or away from the first air hole 1021 to close or open the first air hole 1021, that is, when the sealing plate 2 abuts against the end of the first air hole 1021, the air duct is closed, and when the sealing plate 2 is away from the first air hole 1021, the air duct is opened. It can be seen that the present invention eliminates the shutters in the traditional automatic opening and closing air vents, and closes or opens the air duct by moving the sealing plate 2, thereby simplifying the structure.

[0025] refer to Figure 1 and Figure 2, a rotating shaft 5 is provided inside the sealing plate 2, a gear 3 is fixedly connected to the rotating shaft 5, a sliding groove is provided on each of the two opposite sides of the gear 3 of the sealing plate 2, a rack 4 meshing with the gear 3 is provided in the sliding groove, and a slot 1012 that can cooperate with the end of the rack 4 is provided on the side wall of the wind box 1. Through the above arrangement, the opening and closing of the air duct can be realized by manual operation even after a power outage, eliminating the hidden danger of the existing automatic opening and closing air outlet not working due to power outage. One end of the rotating shaft 5 extends into the first air hole 1021. In actual application, a knob 501 is provided on the rotating shaft 5 to facilitate the rotation of the rotating shaft 5. When manually operated, the sealing plate 2 is pressed to keep it away from the first air hole 1021, and then the knob 501 is rotated to make the rack 4 extend out of the sealing plate 2, so that it is stuck in the slot 1012 of the side wall of the wind box 1, and the position of the sealing plate 2 is limited, so that the first air hole 1021 remains in an open state. When manual operation is not required, the knob 501 is rotated to retract the rack 4 into the sealing plate 2.

[0026] Furthermore, one end of the slide slot is closed, so that the rack 4 can only extend in one direction and retract in the opposite direction, and a limiting structure can be set at the closed end of the slide slot, such as a magnet, to prevent the rack 4 from accidentally extending out of the sealing plate 2. In addition, for easy installation, the sealing plate 2 can be composed of two parts connected by fasteners.

[0027] refer to Figure 1 In this embodiment, the outer end of the first air hole 1021 is detachably connected to a decorative plate 19, and the decorative plate 19 is provided with a plurality of ventilation holes. Further, in order to facilitate manual operation to open the air duct, a sink groove matching the decorative plate 19 is provided on the sealing plate 2, and an elastic ball 20 is provided on each of the two opposite sides of the decorative plate 19, and a groove matching the elastic ball 20 is provided on the side wall of the sink groove. In actual application, a handle is provided in the middle of the decorative plate 19, and the decorative plate 19 can be removed by directly pulling it. It is easy to understand that the elastic ball 20 is a combination of a ball and a spring, the spring is installed inside the decorative plate 19, and the ball is fixedly connected to the outer end of the spring, and the ball can be completely retracted into the decorative plate 19 when squeezed.

[0028] Reference again Figure 1 and Figure 3As an option, the driving assembly in this embodiment includes a mounting box 10, an electromagnet 7, a permanent magnet 8, a driving rod 6 and a reset element 9. The mounting box 10 is fixedly arranged inside the wind box 1. Specifically, the mounting box 10 is supported by a support rod 11, one end of the support rod 11 is fixedly connected to the mounting box 10, and the other end is fixedly connected to the wind box 1; the electromagnet 7 is fixedly arranged at one end of the mounting box 10 near the first air hole 1021, the driving rod 6 is slidably arranged in the mounting box 10 and one end is fixedly connected to the sealing plate 2, the permanent magnet 8 is slidably arranged in the mounting box 10 and is fixedly connected to the driving rod 6, that is, the permanent magnet 8, the sealing plate 2 and the driving rod 6 form a whole and move synchronously. It should be understood that the electromagnet 7 and the mounting box 10, as well as the permanent magnet 8 and the mounting box 10, should be separated by an isolation pad to avoid mutual influence of magnetic fields; the mounting box 10 can also be made of non-magnetic materials to avoid mutual influence of magnetic fields.

[0029] On the basis of the above, the magnetic force generated by the electromagnet 7 when it is powered on and the magnetic force of the permanent magnet 8 repel each other, that is, the electromagnet repels the permanent magnet 8 when it is powered on, and the permanent magnet 8 drives the sealing plate 2 away from the first air hole 1021 to open the air duct. The reset element 9 (a spring is selected in this embodiment) is fixedly connected between the permanent magnet 8 and the mounting box 10 (the reset element 9 and the permanent magnet 8 should also be separated by an isolation pad). After the electromagnet 7 is powered off, the reset element 9 resets the permanent magnet 8 and drives the sealing plate 2 to reset, close the first air hole 1021, and close the air duct. It should be understood that in actual applications, the automatic power on and power off of the electromagnet 7 is controlled by the control system to realize the automatic opening and closing of the air duct.

[0030] As can be seen from the above, the driving component of this embodiment drives the sealing plate 2 to move by means of an electromagnet in cooperation with a permanent magnet 8. In other embodiments, other methods can of course be selected to achieve this, such as driving the sealing plate 2 to move by means of a linear motor, an electric push rod, etc.

[0031] refer to Figure 1 , Figure 3 , Figure 4 and Figure 5 On the basis of the above, a pair of air doors 14 are slidably provided at the inner end of the second air hole 1011, which are used to close or open the second air hole 1011. Specifically, a guide rail 18 cooperating with the air door 14 is provided at the second air hole 1011. Furthermore, the guide rail 18 is "L"-shaped, with the long side fixedly connected to the side wall of the second air hole 1011, and the short side forming a flange to cover the air door 14, thereby limiting the sliding direction of the air door 14 and helping to seal.

[0032] An elastic element 16 (a spring is selected in this embodiment) is provided on the outer side of the damper 14 to keep the damper 14 in the tendency to open the second air hole 1011. Further, two guide rods 17 passing through the damper 14 are fixedly provided in the wind box 1, and the elastic element 16 is sleeved on the guide rods 17, and one end of the elastic element 16 is fixedly connected to the wind box 1, and the other end is fixedly connected to the damper 14.

[0033] A first wedge block 15 is provided on the outer side of the damper 14, and a C-shaped connecting rod 12 is fixedly connected to the end of the driving rod 6 away from the sealing plate 2. A second wedge block 13 is provided on the top of the C-shaped connecting rod 12. When the first air hole 1021 is closed, the second wedge block 13 cooperates with the first wedge block 15, and the two dampers 14 approach each other and press against each other to close the second air outlet. At this time, the elastic element 16 is in a stretched state; in the process of opening the first air hole 1021, the second wedge block 13 gradually separates from the first wedge block 15, and the elastic element 16 gradually recovers its original length, and the two dampers 14 move away from each other to open the second air outlet.

[0034] It is worth noting that, through the above arrangement, the second air hole 1011 can be opened simultaneously during the opening of the first air hole 1021. In practical applications, the degree of opening of the damper 14 can be adjusted by controlling the displacement distance of the driving rod 6 (i.e., controlling the current of the electromagnet 7 to control the magnitude of the magnetic force generated by it). When the present invention is applied to air supply occasions, the air supply volume can be adjusted. It should be understood that in order to adjust the air supply volume by adjusting the opening degree of the second air hole 1011, the cross-sectional area of ​​the first air hole 1021 should be greater than the maximum cross-sectional area of ​​the second air hole 1011 to avoid being restricted by the first air hole 1021. Similarly, on the basis of providing the decorative plate 19, the sum of the cross-sectional areas of all the air holes should also be greater than the maximum cross-sectional area of ​​the second air hole 1011.

[0035] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An automatic opening and closing air vent suitable for a small space environment, comprising an air box installed at the mouth of an air duct, characterized in that: The outer end of the wind box is provided with a first wind hole, the inner end is provided with a second wind hole, a sealing plate is provided inside the wind box, and the sealing plate is connected to a driving component for making the sealing plate approach or move away from the first wind hole to achieve the closing or opening of the first wind hole; A rotating shaft is passed through the inside of the sealing plate, and a gear is fixedly connected to the rotating shaft. The sealing plate is provided with a slide groove on each opposite side of the gear, and a rack meshing with the gear is provided in the slide groove. One end of the rotating shaft extends into the first air hole so that the rack can be extended out of the sealing plate by rotating the rotating shaft. A slot that can cooperate with the end of the rack is provided on the side wall of the air box to limit the position of the sealing plate after the sealing plate is manually squeezed to open the first air hole.

2. The automatic opening and closing air vent suitable for a small space environment according to claim 1 is characterized in that: The driving assembly includes an installation box, an electromagnet, a permanent magnet, a driving rod and a reset element. The installation box is fixedly arranged inside the wind box, the electromagnet is fixedly arranged at one end of the installation box close to the first wind hole, the driving rod is slidably arranged in the installation box and one end is fixedly connected to the sealing plate, the permanent magnet is slidably arranged in the installation box and fixedly connected to the driving rod, the magnetic force generated by the electromagnet when energized and the magnetic force of the permanent magnet repel each other, so as to drive the sealing plate away from the first wind hole through the permanent magnet, and the reset element is fixedly connected between the permanent magnet and the installation box, so as to reset the permanent magnet after the electromagnet is powered off, and drive the sealing plate to reset and close the first wind hole.

3. The automatic opening and closing air vent suitable for a small space environment according to claim 2 is characterized in that: A pair of air doors are slidably provided at the inner end of the second air hole, for closing or opening the second air hole, and elastic elements are provided on the outer sides of the air doors to keep the air doors in the tendency to open the second air hole; A first wedge block is provided on the outer side of the damper, and a C-shaped connecting rod is fixedly connected to the end of the driving rod away from the sealing plate. A second wedge block is provided on the top of the C-shaped connecting rod. When the first air hole is closed, the second wedge block cooperates with the first wedge block to make the damper close the second air outlet and pull the elastic element. In the process of opening the first air hole, the second wedge block gradually separates from the first wedge block, and the damper opens the second air hole under the action of the elastic element.

4. The automatic opening and closing air vent suitable for a small space environment according to claim 3 is characterized in that: Two guide rods passing through the air door are fixedly arranged in the air box, the elastic element is sleeved on the guide rods, and one end of the elastic element is fixedly connected to the air box, and the other end is fixedly connected to the air door.

5. The automatic opening and closing air vent suitable for a small space environment according to claim 3 is characterized in that: A guide rail matching with the air door is arranged at the second air hole.

6. The automatic opening and closing air vent suitable for a small space environment according to claim 3, characterized in that: The reset element and the elastic element are both springs.

7. The automatic opening and closing air vent suitable for a small space environment according to any one of claims 1 to 6, characterized in that: The outer end of the first air hole is detachably connected to a decorative plate, and the decorative plate is provided with a plurality of air holes.

8. The automatic opening and closing air vent suitable for a small space environment according to claim 7, characterized in that: The sealing plate is provided with a sink groove matched with the decorative plate, two opposite sides of the decorative plate are respectively provided with an elastic ball, and the side wall of the sink groove is provided with a groove matched with the elastic ball.

9. The automatic opening and closing air vent suitable for a small space environment according to any one of claims 1 to 6, characterized in that: The wind box comprises a box body and a cover plate, the cover plate is connected to the box body via a fastener, and the first wind hole is arranged on the cover plate.

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