Noise reduction type air conditioner fan structure in theater

Abstract

The invention relates to the technical field of air conditioner fan muting, in particular to a noise reduction type theater inner air conditioner fan structure which comprises a central air conditioner indoor unit, an air inlet cover is arranged on one side of the central air conditioner indoor unit, and a muting mechanism facilitating noise reduction of operation noise of the central air conditioner indoor unit is arranged on the outer side of the central air conditioner indoor unit. A mute fixing mechanism facilitating mute hoisting of the central air conditioner indoor unit is arranged on the outer side of the mute mechanism, and the first micropore sound absorption plates are fixedly bonded to the upper side, the lower side, the left side and the right side of the central air conditioner indoor unit. According to the noise reduction type air conditioner fan structure in the theater, a first micropore sound absorption plate and a second micropore sound absorption plate are arranged on the outer side of a central air conditioner indoor unit in an attached mode, the edge connecting positions are pressed and fixed through an upper fixing frame and a lower fixing frame, and meanwhile the upper fixing frame and the lower fixing frame are connected and fixed through an upper threaded barrel, a lower threaded barrel and a connecting bolt; therefore, resonance and noise generated during operation of the central air conditioner indoor unit can be conveniently subjected to shock absorption and noise reduction treatment.

Description

Technical Field

[0001] This invention relates to the field of air conditioning fan noise reduction technology, specifically to a noise-reducing air conditioning fan structure for theaters. Background Technology

[0002] A theater is a building that provides a venue for the performing arts, including indoor theaters and outdoor plazas. Indoor theaters typically use central air conditioning systems to ensure the comfort of the audience and performers, especially in large or newly built theaters. Existing technologies lack vibration reduction, noise reduction, and anti-warping structures for the indoor unit casing of central air conditioning units, as well as vibration damping and noise reduction structures at the connection between the central air conditioning unit and the hanger. This means that when existing central air conditioning units are in use, the noise generated by the impeller operation and casing resonance during theater operation can easily affect the theater's quiet environment. If noise-reducing cotton panels are directly installed on the outside of the casing, the edges of the panels are prone to warping after prolonged use, affecting the noise reduction effect. Furthermore, most central air conditioning units are installed using connectors and hangers. While the hangers and connectors are often directly connected or connected using gaskets, which provides effective fixation, the vibration generated during the operation of the indoor unit causes the connectors to vibrate, leading to friction between the connectors, hangers, and nuts, producing a rather harsh noise. Based on the shortcomings of existing technologies, this invention designs a noise-reducing theater indoor air conditioning fan structure. Summary of the Invention

[0003] This invention provides a noise-reducing air conditioning fan structure for theaters, which has the advantages of vibration reduction, noise reduction, and anti-warping of the central air conditioning unit casing, as well as vibration damping and noise reduction at the connection between the central air conditioning unit and the hanging rod.

[0004] The present invention provides the following technical solution: a noise reduction type theater air conditioning fan structure, including a central air conditioning unit, an air inlet hood is provided on one side of the central air conditioning unit, a noise reduction mechanism is provided on the outside of the central air conditioning unit to facilitate noise reduction of the operation noise of the central air conditioning unit, and a noise reduction fixing mechanism is provided on the outside of the noise reduction mechanism to facilitate the silent hoisting of the central air conditioning unit. The noise reduction mechanism includes a first microporous sound-absorbing plate, a second microporous sound-absorbing plate, an upper fixed frame, a lower fixed frame, an upper threaded cylinder, a lower threaded cylinder, and a connecting bolt. The first microporous sound-absorbing plate is fixedly bonded to the top, bottom, left, and right sides of the central air conditioning indoor unit. The second microporous sound-absorbing plate is fixedly bonded to the front and rear sides of the central air conditioning indoor unit. The upper fixed frame is fixedly sleeved on the outside of the central air conditioning indoor unit. The lower fixed frame is fixedly set at the bottom of the central air conditioning indoor unit. The upper threaded cylinder is fixedly connected to the four corners at the bottom of the upper fixed frame. The lower threaded cylinder is fixedly connected to the four corners at the lower fixed frame. The connecting bolt is threadedly inserted into the lower threaded cylinder.

[0005] As a preferred embodiment of the present invention, the silent fixing mechanism includes a connecting frame, a threaded hanger rod, an expansion bolt, a lower sleeve washer, an upper washer, an upper fixing nut, a lower fixing nut, a bracket, a rubber washer, and a positioning nut. The connecting frame is fixedly connected to both sides of the upper fixing frame. The threaded hanger rod is inserted into the connecting frame. The expansion bolt is located at the top of the threaded hanger rod. The lower sleeve washer is sleeved on the threaded hanger rod. The upper washer is sleeved on the threaded hanger rod. The upper fixing nut is threadedly connected to the threaded hanger rod. The lower fixing nut is threadedly connected to the threaded hanger rod. The bracket is sleeved on the threaded hanger rod. The rubber washer is located on the lower surface of the bracket. The positioning nut is threadedly sleeved on the threaded hanger rod.

[0006] As a preferred embodiment of the present invention, a fixed frame is fixedly connected between the air inlet hood and the indoor unit of the central air conditioner, a shelf is fixedly connected inside the air inlet hood, and sound-absorbing cotton is fixedly connected between the shelf and the inner wall of the air inlet hood.

[0007] As a preferred embodiment of the present invention, the central air conditioning indoor unit is provided with an air outlet on the front side, fins are provided inside the central air conditioning indoor unit near the air outlet, an air inlet is provided on the rear side of the central air conditioning indoor unit, and an impeller is provided inside the central air conditioning indoor unit near the air inlet.

[0008] As a preferred embodiment of the present invention, the latter two sets of the second microporous sound-absorbing plates are respectively sleeved on the outside of the air outlet and the air inlet.

[0009] As a preferred embodiment of the present invention, the inner sides of the first microporous sound-absorbing plate and the second microporous sound-absorbing plate are provided with adhesive backing, the inner sides of the first microporous sound-absorbing plate and the second microporous sound-absorbing plate are provided with chamfers and are spliced ​​together, and the upper fixing frame is sleeved and pressed and fixed at the edge connection of the first microporous sound-absorbing plate and the second microporous sound-absorbing plate.

[0010] In a preferred embodiment of the present invention, the connecting frame is disposed between the upper gasket and the lower sleeve gasket, and the upper gasket is sleeved on the lower sleeve gasket.

[0011] In a preferred embodiment of the present invention, the upper fixing nut is disposed above the upper washer, and the lower fixing nut is disposed below the lower sleeve washer.

[0012] As a preferred embodiment of the present invention, rubber shock-absorbing pads are provided on both sides of the top of the bracket, the rubber washer is sleeved on the threaded rod, and the positioning nut is located on the lower surface of the rubber washer.

[0013] As a preferred embodiment of the present invention, the air inlet is inserted into the inner side of the air inlet cover, and the impeller is disposed at the inner end of the air inlet cover.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. This noise-reducing theater air conditioning fan structure uses its own adhesive to bond the first and second microporous sound-absorbing panels to the six sides (top, bottom, left, right, front, and back) of the central air conditioning unit, ensuring the edges of the six panels are aligned. An upper fixing bracket is then inserted from top to bottom onto the outside of the unit, and a lower fixing bracket is positioned below to secure the connecting edges of the first and second microporous sound-absorbing panels. The upper and lower threaded cylinders are then aligned, and the upper and lower fixing brackets are secured using threaded bolts. This allows the vibrations and noise generated during the operation of the central air conditioning unit to be absorbed and damped by the first and second microporous sound-absorbing panels. Furthermore, after prolonged use, the upper and lower fixing brackets effectively prevent the edges of the first and second microporous sound-absorbing panels from warping. This device effectively prevents vibrations from occurring during the operation of the central air conditioning unit.

[0015] 2. The structure of this noise-reducing theater air conditioning fan involves sequentially attaching the bracket, rubber gasket, and positioning nut to the threaded hanger and moving them to the top. Then, sequentially attaching the upper fixing nut, upper washer, lower sleeve washer, and lower fixing nut to the threaded hanger. At this point, the connecting frame is secured to the threaded hanger between the lower sleeve washer and the upper washer. The cylindrical tip of the lower sleeve washer passes through the groove of the connecting frame, and the upper washer is placed on top of the lower sleeve washer. This clamps and fixes the connecting frame to its upper and lower sides, thus securing the connecting frame. An isolation treatment is performed between the connecting bracket and the threaded hanger. At this time, the installation positions of the connecting bracket and the central air conditioning indoor unit on the threaded hanger are adjusted and the upper and lower fixing nuts are tightened. If the central air conditioning indoor unit vibrates during operation, causing the connecting bracket to vibrate as well, the upper and lower sleeve shims can effectively absorb energy and prevent the connecting bracket from contacting the upper fixing nut and causing noise. At the same time, the lower sleeve shim can also effectively prevent the vibrating connecting bracket from contacting the threaded hanger and causing noise. This device is convenient for preventing the vibration transmission of noise after the central air conditioning indoor unit is installed and operated. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the air conditioner indoor unit structure from below according to the present invention; Figure 3 This is a schematic diagram of the structure of the air conditioner indoor unit and the noise reduction mechanism of the present invention; Figure 4 This is a schematic diagram of the connection structure between the indoor unit of the air conditioner and the air inlet cover of the present invention; Figure 5 This is a schematic diagram of the silent fixing mechanism of the present invention; Figure 6This is a schematic diagram of the exploded structure of the main body of the silent fixing mechanism of the present invention.

[0017] In the diagram: 1. Central air conditioning indoor unit; 101. Air outlet; 102. Fins; 103. Air inlet; 104. Impeller; 2. Air inlet cover; 201. Fixing frame; 202. Shelf; 203. Sound-absorbing lining; 3. Sound-absorbing fixing mechanism; 301. Connecting frame; 302. Threaded hanger; 303. Expansion bolt; 304. Lower sleeve gasket; 305. Upper gasket; 306. Upper fixing nut; 307. Lower fixing nut; 308. Bracket; 309. Rubber washer; 310. Positioning nut; 4. Sound-absorbing mechanism; 401. First microporous sound-absorbing plate; 402. Second microporous sound-absorbing plate; 403. Upper fixing frame; 404. Lower fixing frame; 405. Upper threaded cylinder; 406. Lower threaded cylinder; 407. Connecting bolt. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Please see Figure 1 - Figure 6 The noise-reducing theater air conditioning fan structure includes a central air conditioning unit 1, an air inlet hood 2 on one side of the central air conditioning unit 1, a noise reduction mechanism 4 on the outside of the central air conditioning unit 1 to reduce the operating noise of the central air conditioning unit 1, a noise reduction fixing mechanism 3 on the outside of the noise reduction mechanism 4 to facilitate the silent installation of the central air conditioning unit 1, an air outlet 101 on the front side of the central air conditioning unit 1, fins 102 on the inside of the central air conditioning unit 1 near the air outlet 101, an air inlet 103 on the rear side of the central air conditioning unit 1, an impeller 104 on the inside of the central air conditioning unit 1 near the air inlet 103, the air inlet 103 is inserted into the inside of the air inlet hood 2, and the impeller 104 is located at the inner end of the air inlet hood 2.

[0020] Please see Figure 4 A fixed frame 201 is fixedly connected between the air inlet hood 2 and the indoor unit 1 of the central air conditioner. A shelf 202 is fixedly connected inside the air inlet hood 2. A sound-absorbing lining 203 is fixedly connected between the shelf 202 and the inner wall of the air inlet hood 2.

[0021] By setting up an air inlet hood 2 and a fixing frame 201, the air inlet hood 2 is fixed at the air inlet 103 to extend the air inlet length of the air inlet 103. By setting up a shelf 202 and a sound-absorbing lining 203, the noise reflection length inside the air inlet hood 2 is shortened, and the noise is quickly silenced.

[0022] Please see Figure 3 and Figure 5 The noise reduction mechanism 4 includes a first microporous sound-absorbing plate 401, a second microporous sound-absorbing plate 402, an upper fixing frame 403, a lower fixing frame 404, an upper threaded cylinder 405, a lower threaded cylinder 406, and a connecting bolt 407. The first microporous sound-absorbing plate 401 is fixedly bonded to the top, bottom, left, and right sides of the central air conditioning indoor unit 1. The second microporous sound-absorbing plate 402 is fixedly bonded to the front and rear sides of the central air conditioning indoor unit 1. The upper fixing frame 403 is fixedly sleeved on the outside of the central air conditioning indoor unit 1. The lower fixing frame 404 is fixedly installed at the bottom of the central air conditioning indoor unit 1. The upper threaded cylinder 405 is fixedly connected to the upper... At the four corners of the bottom of the fixing frame 403, the lower threaded cylinder 406 is fixedly connected to the four corners of the lower fixing frame 404. The connecting bolt 407 is threaded into the lower threaded cylinder 406. The two sets of second microporous sound-absorbing plates 402 are respectively sleeved on the outside of the air outlet 101 and the air inlet 103. The inner sides of the first microporous sound-absorbing plate 401 and the second microporous sound-absorbing plate 402 are provided with adhesive. The inner sides of the first microporous sound-absorbing plate 401 and the second microporous sound-absorbing plate 402 are chamfered and spliced ​​together. The upper fixing frame 403 is sleeved and pressed at the edge connection of the first microporous sound-absorbing plate 401 and the second microporous sound-absorbing plate 402.

[0023] By setting a first microporous sound-absorbing plate 401 and a second microporous sound-absorbing plate 402, and providing adhesive backing on the inner side of the first microporous sound-absorbing plate 401 and the second microporous sound-absorbing plate 402, it is possible to bond the first microporous sound-absorbing plate 401 and the second microporous sound-absorbing plate 402 to the outside of the central air conditioning indoor unit 1, thereby reducing vibration and noise generated during the operation of the central air conditioning indoor unit 1. By setting an upper fixing bracket 403 and a lower fixing bracket 404, it is possible to press and fix the corners of the first microporous sound-absorbing plate 401 and the second microporous sound-absorbing plate 402, preventing the first microporous sound-absorbing plate 401 and the second microporous sound-absorbing plate 402 from warping after long-term use, thus affecting the vibration and noise reduction effect. By setting an upper threaded cylinder 405, a lower threaded cylinder 406 and a connecting bolt 407, it is possible to connect and fix the upper fixing bracket 403 and the lower fixing bracket 404.

[0024] Please see Figure 5 - Figure 6The silent fixing mechanism 3 includes a connecting frame 301, a threaded hanger 302, an expansion bolt 303, a lower sleeve washer 304, an upper washer 305, an upper fixing nut 306, a lower fixing nut 307, a bracket 308, a rubber washer 309, and a positioning nut 310. The connecting frame 301 is fixedly connected to both sides of the upper fixing frame 403. The threaded hanger 302 is inserted into the connecting frame 301. The expansion bolt 303 is located at the top of the threaded hanger 302. The lower sleeve washer 304 is sleeved on the threaded hanger 302. The upper washer 305 is sleeved on the threaded hanger 302. The upper fixing nut 306 is threaded onto the threaded hanger 302. The lower fixing nut 307 is fixed on the lower fixing nut 308. A threaded connection is made to a threaded rod 302. A bracket 308 is fitted onto the threaded rod 302. A rubber washer 309 is fitted onto the lower surface of the bracket 308. A positioning nut 310 is threaded onto the threaded rod 302. A connecting bracket 301 is positioned between an upper washer 305 and a lower sleeve washer 304. The upper washer 305 is fitted onto the lower sleeve washer 304. An upper fixing nut 306 is positioned above the upper washer 305. A lower fixing nut 307 is positioned below the lower sleeve washer 304. Rubber shock-absorbing pads are provided on both sides of the top of the bracket 308. A rubber washer 309 is fitted onto the threaded rod 302. A positioning nut 310 is positioned on the lower surface of the rubber washer 309.

[0025] By setting up a connecting frame 301, threaded hanger 302, expansion bolt 303, upper washer 305, and lower fixing nut 307, the central air conditioning indoor unit 1 can be installed on the indoor ceiling. By setting up an upper washer 305 and a lower sleeve washer 304, with the upper washer 305 sleeved on the lower sleeve washer 304, the connecting frame 301 is isolated from the threaded hanger 302, upper fixing nut 306, and lower fixing nut 307. This prevents the vibration generated by the operation of the central air conditioning indoor unit 1 from causing the connecting frame 301 to vibrate and come into contact with the threaded hanger 302, upper fixing nut 306, and lower fixing nut 307, thus preventing noise. By setting up a bracket 308, rubber washer 309, and positioning nut 310, the vertical state of the threaded hanger 302 can be maintained, further preventing the threaded hanger 302 from vibrating due to large vibration amplitude of the central air conditioning indoor unit 1.

[0026] Working principle: When the noise-reducing theater air conditioning fan structure is in use, in the initial state, the air outlet 101 and air inlet 103 are respectively set on the front and rear sides of the central air conditioning indoor unit 1. The central air conditioning indoor unit 1 is also equipped with fins 102 and an impeller 104 to facilitate cooling, heating, and air delivery. The air inlet hood 2, sleeved on the outside of the air inlet 103, is connected to the central air conditioning indoor unit 1 via a fixing frame 201. The inner side of the air inlet hood 2 is spaced by a shelf 202, and the inner wall is fitted with sound-absorbing cotton 203 to absorb and reduce the noise generated by the impeller 104 during operation. The first microporous sound-absorbing plate 401 and the second microporous sound-absorbing plate 402, which are attached to the outside of the central air conditioning indoor unit 1, are connected by an upper fixing frame 4. 03 and the lower fixed frame 404 are pressed and fixed at the edge connection. At the same time, the upper fixed frame 403 and the lower fixed frame 404 are connected and fixed by the upper threaded cylinder 405, the lower threaded cylinder 406 and the connecting bolt 407, so as to reduce the resonance and noise generated by the operation of the central air conditioning indoor unit 1. After the lower sleeve gasket 304 and the upper gasket 305 are installed on the upper and lower sides of the connecting frame 301 set on both sides of the first microporous sound-absorbing plate 401, they are connected to the threaded hanger 302. The upper gasket 305 and the lower sleeve gasket 304 are fixed by the upper fixing nut 306 and the lower fixing nut 307, so as to prevent the vibration of the central air conditioning indoor unit 1 during operation from causing the connecting frame 301 to vibrate and contact the threaded hanger 302, generating noise. When it is necessary to prevent vibration of the central air conditioning indoor unit 1 during operation, firstly, use the adhesive backing to bond the first microporous sound-absorbing plate 401 and the second microporous sound-absorbing plate 402 to the top, bottom, left, right, front, and back six sides of the central air conditioning indoor unit 1, respectively, and align the edges of the six first microporous sound-absorbing plates 401 and second microporous sound-absorbing plates 402. Then, insert the upper fixing bracket 403 from top to bottom onto the outside of the central air conditioning indoor unit 1, and place the lower fixing bracket 404 below the central air conditioning indoor unit 1 to ensure proper connection at the joint edges of the first microporous sound-absorbing plates 401 and second microporous sound-absorbing plates 402. The upper threaded cylinder 405 and the lower threaded cylinder 406 are then connected and the upper fixed frame 403 and the lower fixed frame 404 are fixed by threaded insertion of the connecting bolt 407. At this time, the vibration and noise generated during the operation of the central air conditioning indoor unit 1 can be damped and absorbed by the first microporous sound-absorbing plate 401 and the second microporous sound-absorbing plate 402. After long-term use, the upper fixed frame 403 and the lower fixed frame 404 can effectively prevent the warping of the first microporous sound-absorbing plate 401 and the second microporous sound-absorbing plate 402. This device is convenient for preventing the central air conditioning indoor unit 1 from vibrating during operation.

[0027] When it is necessary to prevent noise caused by vibration transmission after the installation and operation of the central air conditioning indoor unit 1, firstly, in sequence, put the bracket 308, rubber washer 309, and positioning nut 310 onto the threaded hanger 302 and move them to the top. Then, in sequence, put the upper fixing nut 306, upper washer 305, lower sleeve washer 304, and lower fixing nut 307 onto the threaded hanger 302 one by one. At this time, the connecting bracket 301 is clamped onto the threaded hanger 302 between the lower sleeve washer 304 and the upper washer 305. The top cylindrical part of the lower sleeve washer 304 is passed through the groove of the connecting bracket 301, and the upper washer 305 is put on the lower sleeve washer 304, so that the lower sleeve washer 304 and the upper washer 305 are aligned with the connecting bracket 301. The upper and lower sides are clamped and fixed, and the connection frame 301 and the threaded hanger 302 are separated. At this time, the installation positions of the connection frame 301 and the central air conditioner indoor unit 1 on the threaded hanger 302 are adjusted and the upper fixing nut 306 and the lower fixing nut 307 are tightened. If the central air conditioner indoor unit 1 vibrates during operation, causing the connection frame 301 to vibrate accordingly, the upper gasket 305 and the lower sleeve gasket 304 can effectively absorb energy and prevent the connection frame 301 from contacting the upper fixing nut 306 and causing noise. At the same time, the lower sleeve gasket 304 can also effectively prevent the vibrating connection frame 301 from contacting the threaded hanger 302 and causing noise. This device is convenient to prevent the vibration of the central air conditioner indoor unit 1 from transmitting noise after installation and operation.

[0028] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0029] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A noise-reducing theater air conditioning fan structure, including a central air conditioning indoor unit (1), characterized in that: An air inlet cover (2) is provided on one side of the central air conditioning indoor unit (1), and a noise reduction mechanism (4) is provided on the outside of the central air conditioning indoor unit (1) to reduce the noise of the central air conditioning indoor unit (1) during operation. A noise reduction fixing mechanism (3) is provided on the outside of the noise reduction mechanism (4) to facilitate the silent installation of the central air conditioning indoor unit (1). The noise reduction mechanism (4) includes a first microporous sound-absorbing plate (401), a second microporous sound-absorbing plate (402), an upper fixed frame (403), a lower fixed frame (404), an upper threaded cylinder (405), a lower threaded cylinder (406), and a connecting bolt (407). The first microporous sound-absorbing plate (401) is fixedly bonded to the top and bottom and left and right sides of the central air conditioning indoor unit (1). The second microporous sound-absorbing plate (402) is fixedly bonded to the front and rear sides of the central air conditioning indoor unit (1). The upper fixed frame (403) is fixedly sleeved on the outside of the central air conditioning indoor unit (1). The lower fixed frame (404) is fixedly set at the bottom of the central air conditioning indoor unit (1). The upper threaded cylinder (405) is fixedly connected to the four corners of the bottom of the upper fixed frame (403). The lower threaded cylinder (406) is fixedly connected to the four corners of the lower fixed frame (404). The connecting bolt (407) is threadedly inserted into the lower threaded cylinder (406).

2. The noise-reducing theater air conditioning fan structure according to claim 1, characterized in that: The silent fixing mechanism (3) includes a connecting frame (301), a threaded rod (302), an expansion bolt (303), a lower washer (304), an upper washer (305), an upper fixing nut (306), a lower fixing nut (307), a bracket (308), a rubber washer (309), and a positioning nut (310). The connecting frame (301) is fixedly connected to both sides of the upper fixing frame (403). The threaded rod (302) is inserted into the connecting frame (301), and the expansion bolt (303) is located on the threaded rod (302). At the top, the lower sleeve washer (304) is sleeved on the threaded rod (302), the upper washer (305) is sleeved on the threaded rod (302), the upper fixing nut (306) is threaded on the threaded rod (302), the lower fixing nut (307) is threaded on the threaded rod (302), the bracket (308) is sleeved on the threaded rod (302), the rubber washer (309) is disposed on the lower surface of the bracket (308), and the positioning nut (310) is threaded on the threaded rod (302).

3. The noise-reducing theater air conditioning fan structure according to claim 1, characterized in that: A fixed frame (201) is fixedly connected between the air inlet hood (2) and the central air conditioning indoor unit (1). A shelf (202) is fixedly connected inside the air inlet hood (2). A sound-absorbing lining (203) is fixedly connected between the shelf (202) and the inner wall of the air inlet hood (2).

4. The noise-reducing theater air conditioning fan structure according to claim 1, characterized in that: The central air conditioning indoor unit (1) has an air outlet (101) on the front side, fins (102) on the inside of the central air conditioning indoor unit (1) near the air outlet (101), an air inlet (103) on the rear side of the central air conditioning indoor unit (1), and an impeller (104) on the inside of the central air conditioning indoor unit (1) near the air inlet (103).

5. The noise-reducing theater air conditioning fan structure according to claim 1, characterized in that: The two sets of the second microporous sound-absorbing panels (402) are respectively sleeved on the outside of the air outlet (101) and the air inlet (103).

6. The noise-reducing theater air conditioning fan structure according to claim 1, characterized in that: The inner sides of the first microporous sound-absorbing plate (401) and the second microporous sound-absorbing plate (402) are provided with adhesive backing. The inner sides of the first microporous sound-absorbing plate (401) and the second microporous sound-absorbing plate (402) are provided with chamfers and spliced ​​together. The upper fixing frame (403) is sleeved and pressed and fixed at the edge connection of the first microporous sound-absorbing plate (401) and the second microporous sound-absorbing plate (402).

7. The noise-reducing theater air conditioning fan structure according to claim 2, characterized in that: The connecting frame (301) is disposed between the upper gasket (305) and the lower sleeve gasket (304), and the upper gasket (305) is sleeved on the lower sleeve gasket (304).

8. The noise-reducing theater air conditioning fan structure according to claim 2, characterized in that: The upper fixing nut (306) is positioned above the upper washer (305), and the lower fixing nut (307) is positioned below the lower sleeve washer (304).

9. The noise-reducing theater air conditioning fan structure according to claim 2, characterized in that: The bracket (308) has rubber shock-absorbing pads on both sides of its top end, the rubber washer (309) is sleeved on the threaded rod (302), and the positioning nut (310) is located on the lower surface of the rubber washer (309).

10. The noise-reducing theater air conditioning fan structure according to claim 4, characterized in that: The air inlet (103) is inserted into the inner side of the air inlet cover (2), and the impeller (104) is located at the inner end of the air inlet cover (2).

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