Double-air-inlet centrifugal fan

Abstract

The utility model relates to the technical field of fans, in particular to a double-air-inlet centrifugal fan which comprises a base plate, a protection box, a blocking plate, an air outlet hopper and a dustproof device, the dustproof device comprises an installation ring, a dustproof net, an installation assembly and an auxiliary assembly, the installation ring is detachably connected with the protection box, the dustproof net is fixedly connected with the installation ring, the installation assembly is arranged on the protection box, and the auxiliary assembly is arranged on the protection box. In the process of using the centrifugal fan, the mounting ring is detachably mounted at the air inlet groove of the protection box through the mounting assembly, so that the opening of the air inlet groove is shielded by the dustproof net, and external air can enter the protection box through the dustproof net; and the dustproof net plays a role in adsorbing and blocking external dust, so that the dust in the air can be reduced from entering the protection box through the air inlet groove, the aging rate of elements in the protection box is slowed down, and the service life of the centrifugal fan is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of fans, in particular to a double-inlet centrifugal fan. Background Art

[0002] During use, the two impellers of the current double-inlet centrifugal fan work synchronously, which is prone to produce large vibrations, resulting in large noise during use, affecting the user experience.

[0003] Prior art CN219159263U discloses a double-inlet centrifugal fan, including a protection box, two volutes are symmetrically arranged inside the protection box, air inlet slots are opened at both ends of the protection box and at the air inlet of the volute, an impeller is rotatably arranged inside the air inlet slot, a driving mechanism is arranged inside the protection box to drive the impeller to rotate to achieve an air delivery effect, one end of the volute is connected to an air outlet, shock absorbing mechanisms are arranged on both sides of the protection box, connecting strips are arranged inside the shock absorbing mechanism, and every two connecting strips are connected to an arc-shaped support block, and the shock absorbing mechanism includes a slide plate, a slider, a spring, and a damper arranged inside the spring. The device comprises a driving mechanism including a driving motor, a shaft, a driving gear and driven gears respectively located on both sides of the driving gear and meshing with the driving gear. A sound insulation box is arranged between the two volutes. The volute can be supported by an arc-shaped support block. At the same time, the volute has only a small contact area, which is used to reinforce the volute. When the volute vibrates, the vibration can be transmitted to the slider through the connecting strip. The slider and the connecting strip can be cushioned by the spring and the damper, thereby further cushioning the volute, reducing shaking, preventing the volute from colliding with the protection box, and preventing the protection box from shaking and generating noise, thereby improving the user experience.

[0004] However, when the above method is adopted, the air inlet slot is set in an open manner, resulting in dust in the air entering the protection box through the air inlet slot during use. During long-term use, the aging of the internal components of the protection box will be accelerated, and the service life of the centrifugal fan will be reduced. Utility Model Content

[0005] The utility model aims to provide a double-inlet centrifugal fan, which can reduce the dust in the air from entering the interior of the protection box through the air inlet slot during the use of the centrifugal fan, thereby slowing down the aging rate of the internal components of the protection box and increasing the service life of the centrifugal fan.

[0006] To achieve the above-mentioned purpose, the utility model provides a double-inlet centrifugal fan, comprising a chassis, a protection box, a blocking plate and an air outlet hopper, wherein the protection box is rotatably connected to the chassis and is located on one side of the chassis, the blocking plate is slidably connected to the protection box and is located on one side of the protection box, the air outlet hopper is arranged at the top of the protection box, and further comprises a dustproof device;

[0007] The dustproof device includes a mounting ring, a dustproof net, a mounting assembly and an auxiliary assembly. The mounting ring is detachably connected to the protective box and is located on one side of the protective box. The dustproof net is fixedly connected to the mounting ring and is located on one side of the mounting ring. The mounting assembly is arranged on the protective box, and the auxiliary assembly is arranged on the dustproof net.

[0008] Wherein, the installation assembly includes a plug-in rail and a fixing member, the plug-in rail is fixedly connected to the protection box and is located on one side of the protection box; the fixing member is respectively arranged on the protection box and the installation ring.

[0009] Wherein, the fixed component includes a circular track and a moving block, the circular track is fixedly connected to the protection box, and the circular track is interconnected with the plug-in track; the moving block is fixedly connected to the mounting ring and slidably connected to the circular track.

[0010] Wherein, the auxiliary component comprises a rotating block and a matching component, the rotating block is fixedly connected to the dustproof net and is located at one side of the dustproof net; the matching component is arranged on the rotating block.

[0011] Wherein, the matching component includes a force-applying block and a protective pad, the force-applying block is fixedly connected to the rotating block and is located on one side of the rotating block; the protective pad is fixedly connected to the force-applying block and is located on one side of the force-applying block.

[0012] The utility model discloses a double-inlet centrifugal fan, comprising a chassis, a protection box, a sealing plate, an air outlet hopper and a dustproof device, wherein the dustproof device comprises a mounting ring, a dustproof net, a mounting assembly and an auxiliary assembly. During use of the centrifugal fan, the mounting ring is detachably mounted on the air inlet slot of the protection box through the mounting assembly, so that the dustproof net blocks the opening of the air inlet slot, and outside air can enter the inside of the protection box through the dustproof net. The dustproof net can absorb and block the outside dust, so that the dust in the air can be reduced from entering the inside of the protection box through the air inlet slot, thereby slowing down the aging rate of the internal components of the protection box and increasing the service life of the centrifugal fan. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below.

[0014] Figure 1 It is a schematic diagram of the overall structure of the double-inlet centrifugal fan of the first embodiment of the utility model.

[0015] Figure 2 It is a schematic structural diagram of the dustproof device of the first embodiment of the utility model.

[0016] Figure 3 It is a structural schematic diagram of the fixing component of the first embodiment of the utility model.

[0017] Figure 4 It is a structural schematic diagram of the matching component of the second embodiment of the utility model.

[0018] In the figure: 101-chassis, 102-protection box, 103-blocking plate, 104-air outlet, 105-mounting ring, 106-dust screen, 107-plug-in track, 108-circular track, 109-moving block, 110-rotating block, 201-force block, 202-protective pad. DETAILED DESCRIPTION

[0019] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0020] The first embodiment of the present application is:

[0021] See also Figures 1 to 3 ,in Figure 1 It is a schematic diagram of the overall structure of a double-inlet centrifugal fan. Figure 2 It is a schematic diagram of the structure of the dustproof device. Figure 3 The utility model provides a double-inlet centrifugal fan: comprising a chassis 101, a protection box 102, a protection box 102, an air outlet 104 and a dustproof device, the dustproof device comprises a mounting ring 105, a dustproof net 106, a mounting assembly and an auxiliary assembly, the mounting assembly comprises a plug-in rail 107 and a fixing member, the fixing member comprises a circular rail 108 and a moving block 109, and the auxiliary assembly comprises a rotating block 110 and a matching member. The aforementioned scheme solves the problem that the air inlet slot is set as an open type, resulting in dust in the air entering the interior of the protection box 102 through the air inlet slot during use, which will accelerate the aging of the internal components of the protection box 102 during long-term use and reduce the service life of the centrifugal fan. It can be understood that the aforementioned scheme can be used to reduce the dust in the air from entering the interior of the protection box 102 through the air inlet slot during use of the centrifugal fan, thereby slowing down the aging rate of the internal components of the protection box 102 and increasing the service life of the centrifugal fan. It can also be used to facilitate the installation and disassembly of the dustproof net 106, which is easy to operate.

[0022] According to the present specific embodiment, the protection box 102 is rotatably connected to the chassis 101 and is located on one side of the chassis 101, the protection box 102 is slidably connected to the protection box 102 and is located on one side of the protection box 102, the air outlet scoop 104 is arranged at the top of the protection box 102, and two volutes are symmetrically arranged inside the protection box 102, and air inlet slots are opened at both ends of the protection box 102 and at the air inlet of the volute, and impellers are rotatably arranged inside the two air inlet slots, and air inlet slots are opened at both ends of the protection box 102 and at the air inlet of the volute, and impellers are rotatably arranged inside the air inlet slot, and a driving mechanism is arranged inside the protection box 102 for driving the impeller to rotate to achieve the air delivery effect, one end of the volute is connected to the air outlet scoop 104, and shock absorbing mechanisms are arranged on both sides of the protection box 102, and connecting strips are arranged inside the shock absorbing mechanism, and every two connecting strips are connected to an arc-shaped support block together, and the shock absorbing mechanism includes a slide plate, A slider, a spring and a damper arranged inside the spring, a driving mechanism includes a driving motor, a shaft, a driving gear and a driven gear respectively located on both sides of the driving gear and meshing with the driving gear, a sound insulation box is arranged between the two volutes, the bottom of the protection box 102 is rotatably connected to the chassis 101 through a rotating column, so that the air outlet of the protection box 102 can be adjusted, an inspection port is opened on the top of the protection box 102, and the protection box 102 is slidably connected to both sides of the inner wall of the inspection port, the volute can be supported by an arc-shaped support block, and at the same time, the volute has only a small area of ​​contact, which is used to reinforce the volute. When the volute vibrates, the vibration can be transmitted to the slider through the connecting strip, and the slider and the connecting strip can be cushioned by the spring and the damper, thereby further cushioning the volute, reducing shaking, preventing the volute from colliding with the protection box 102, and preventing the protection box 102 from shaking and generating noise, thereby improving the user experience, all of the above are prior art.

[0023] The mounting ring 105 is detachably connected to the protection box 102 and is located on one side of the protection box 102. The dustproof net 106 is fixedly connected to the mounting ring 105 and is located on one side of the mounting ring 105. The mounting assembly is arranged on the protection box 102. The auxiliary assembly is arranged on the dustproof net 106. The mounting ring 105 is in the shape of a circular ring. The diameter of the mounting ring 105 matches the diameter of the air inlet slot, so that the mounting ring 105 can be detachably installed in the air inlet slots on both sides of the protection box 102. The dustproof net 106 is fixed on the mounting ring. The inner surface of the dustproof net 105 is made of a low-carbon steel plate, and the surface of the dustproof net 106 is subjected to electrostatic powder spraying technology, so that the dustproof net 106 has the characteristics of dustproof, rust-proof and corrosion-resistant. The surface array of the dustproof net 106 is provided with through holes, and the through holes penetrate the dustproof net 106, so that after the dustproof net 106 is installed through the mounting ring 105, the dustproof net 106 makes the air inlet slot of the protection box 102 connected with the outside world, and under the blocking effect of the dustproof net 106, it can reduce the dust in the outside air from entering the air inlet slot, thereby delaying the The aging time limit of the internal components of the protection box 102 is slowed down, and the service life is increased. The installation component is arranged at the air inlet slot of the protection box 102. The arrangement of the installation component makes it easy to install and remove the dust net 106 on the protection box 102 through the installation ring 105, and makes it possible to keep the dust net 106 in a stable state after installation, so as to facilitate the replacement of the dust net 106. The auxiliary component is arranged on the dust net 106, and the auxiliary component is used in conjunction with the installation component, so as to facilitate the replacement of the dust net 106. Installation and disassembly. During the use of this centrifugal fan, the mounting ring 105 is detachably installed at the air inlet slot of the protective box 102 through the mounting assembly, so that the dustproof net 106 blocks the opening of the air inlet slot, allowing the outside air to enter the inside of the protective box 102 through the dustproof net 106, and the dustproof net 106 has the effect of absorbing and blocking the outside dust, so that the dust in the air can be reduced from entering the inside of the protective box 102 through the air inlet slot, thereby slowing down the aging rate of the internal components of the protective box 102 and increasing the service life of the centrifugal fan.

[0024] Secondly, the plug-in rail 107 is fixedly connected to the protection box 102 and is located on one side of the protection box 102; the circular rail 108 is fixedly connected to the protection box 102, and the circular rail 108 and the plug-in rail 107 are interconnected; the moving block 109 is fixedly connected to the mounting ring 105 and is slidably connected to the circular rail 108. The number of the plug-in rails 107 is two, and the two plug-in rails 107 are opened on the left and right sides of the air inlet slot of the protection box 102. The circular rail 108 is circular, and the diameter of the circular rail 108 is larger than the diameter of the air inlet slot of the protection box 102. The circular rail 108 is opened between the outer wall and the inner wall of the protection box 102, and the two sides of the circular rail 108 are respectively interconnected with the two plug-in rails 107. The number of the moving blocks 109 is two, and the two moving blocks 109 are symmetrically fixedly arranged on the mounting ring 105. On the left and right sides of the mounting ring 105, the cross-sectional dimensions of the moving block 109 are adapted to the cross-sectional dimensions of the plug-in rail 107, so that the moving block 109 can be plugged into the plug-in rail 107, and the cross-sectional dimensions of the moving block 109 are adapted to the cross-sectional dimensions of the circular rail 108, so that after the moving block 109 is placed in the plug-in rail 107, it can be moved to the circular rail 108 by rotation and fixing, so that the two moving blocks 109 are respectively abutted against the two sides of the circular rail 108, so that a large resistance is generated between the moving block 109 and the circular rail 108, thereby fixing the mounting ring 105. After the moving block 109 is moved from the circular rail 108 to the plug-in rail 107, the moving block 109 can be easily taken out, thereby disassembling the mounting ring 105, and then facilitating the cleaning and replacement of the dustproof net 106.

[0025] At the same time, the rotating block 110 is fixedly connected to the dustproof net 106 and is located on one side of the dustproof net 106; the mating component is arranged on the rotating block 110, and the rotating block 110 is fixed at the center of the dustproof net 106. The setting of the rotating block 110 provides a force point for the operator, so that the operator can easily insert the moving blocks 109 on both sides of the mounting ring 105 on the periphery of the dustproof net 106 into the plug-in track 107 through the rotating block 110, and then rotate the dustproof net 106 through the rotating block 110, so that the moving block 109 moves into the circular track 108, thereby fixing the dustproof net 106.

[0026] When using a double-inlet centrifugal fan of the present embodiment, the movable blocks 109 on both sides of the mounting ring 105 on the periphery of the dustproof net 106 are plugged into the plug-in track 107 through the rotating block 110, and then the dustproof net 106 is rotated by the rotating block 110, so that the movable block 109 moves into the circular track 108, so that the mounting ring 105 can be detachably installed at the air inlet slot of the protection box 102, so that the dustproof net 106 blocks the opening of the air inlet slot, so that outside air can enter the inside of the protection box 102 through the dustproof net 106, and the dustproof net 106 has the effect of absorbing and blocking the outside dust, so that the dust in the air can be reduced from entering the inside of the protection box 102 through the air inlet slot, thereby slowing down the aging rate of the internal components of the protection box 102 and increasing the service life of the centrifugal fan.

[0027] The second embodiment of the present application is:

[0028] Based on the first embodiment, please refer to Figure 4 , Figure 4 2 is a schematic structural diagram of a matching component of the second embodiment. The matching component of this embodiment includes a force applying block 201 and a protective pad 202 .

[0029] According to this specific embodiment, the matching component includes a force block 201 and a protective pad 202. The force block 201 is fixedly connected to the rotating block 110 and is located on one side of the rotating block 110; the protective pad 202 is fixedly connected to the force block 201 and is located on one side of the force block 201. There are four force blocks 201. The four force blocks 201 are fixed to the outer surface of the rotating block 110 at a 90° interval with the center of the rotating block 110 as the starting point. Each of the force blocks 201 has a curved surface on the side away from the rotating block 110. The curved surface conforms to ergonomics and is adapted to the curvature of human fingers, so that the operator can The rotating block 110 can be rotated by the force block 201, so as to increase the resistance between the operator's hand and the rotating block 110 through the force block 201, making it easier to install and remove the dustproof net 106. The protective pad 202 is provided on the arc surface of the force block 201. The protective pad 202 is made of soft rubber material and has the characteristics of anti-slip and wear-resistant. The setting of the protective pad 202 allows the operator to contact the force block 201 through the protective pad 202, making it easier to rotate the rotating block 110 through the force block 201, and facilitating the installation and removal of the dustproof net 106.

[0030] When using a double-inlet centrifugal fan of the present embodiment, an operator rotates the rotating block 110 through the force block 201, thereby increasing the resistance between the operator's hand and the rotating block 110 through the force block 201, making it easier to install and disassemble the dustproof net 106. The provision of the protective pad 202 allows the operator to contact the force block 201 through the protective pad 202, making it more labor-saving when rotating the rotating block 110 through the force block 201.

[0031] What is disclosed above is only one or more preferred embodiments of the present application, and cannot be used to limit the scope of rights of the present application. Ordinary technicians in this field can understand that all or part of the processes of implementing the above embodiments and equivalent changes made according to the claims of the present application are still within the scope covered by the present application.

Claims

1. A double-inlet centrifugal fan, comprising a chassis, a protection box, a blocking plate and an air outlet scoop, wherein the protection box is rotatably connected to the chassis and is located on one side of the chassis, the blocking plate is slidably connected to the protection box and is located on one side of the protection box, and the air outlet scoop is arranged at the top of the protection box, characterized in that: Also includes dust protection; The dustproof device comprises a mounting ring, a dustproof net, a mounting assembly and an auxiliary assembly, wherein the mounting ring is detachably connected to the protection box and is located on one side of the protection box, the dustproof net is fixedly connected to the mounting ring and is located on one side of the mounting ring, the mounting assembly is arranged on the protection box, and the auxiliary assembly is arranged on the dustproof net; The installation assembly includes a plug-in rail and a fixing member, wherein the plug-in rail is fixedly connected to the protection box and is located on one side of the protection box; the fixing member is respectively arranged on the protection box and the installation ring; The fixed component includes a circular track and a moving block. The circular track is fixedly connected to the protection box, and the circular track is communicated with the plug-in track; the moving block is fixedly connected to the mounting ring and is slidably connected to the circular track.

2. The double-inlet centrifugal fan according to claim 1, characterized in that: The auxiliary component comprises a rotating block and a matching component. The rotating block is fixedly connected to the dustproof net and is located at one side of the dustproof net. The matching component is arranged on the rotating block.

3. The double-inlet centrifugal fan according to claim 2, characterized in that: The matching component includes a force-applying block and a protective pad. The force-applying block is fixedly connected to the rotating block and is located at one side of the rotating block; the protective pad is fixedly connected to the force-applying block and is located at one side of the force-applying block.

Images