Fan silencing box structure

Abstract

The utility model discloses a fan silencing box structure, which is characterized in that a fan is arranged in an upper shell and a lower shell, the lower part of the lower shell is provided with an air inlet, the bottom of the lower shell is sequentially provided with lower shell silencing sponge and silencing box vibration buffering sponge, and the top of the lower shell is provided with an upper shell channel and a lower shell channel which are communicated up and down; a channel formed by the upper shell and the lower shell is arranged between the joint surfaces of the upper shell and the lower shell; the following airflow flowing channels are formed by the air inlet, the cavity formed by the lower shell noise reduction sponge and the noise reduction box vibration reduction sponge, the upper and lower shell channels, the channel formed by the upper shell and the lower shell, the fan air inlet and the fan air outlet. As a part of the breathing machine, the structure, a humidifier, a display screen assembly, a shell and the like jointly form a main machine part of the breathing machine, and vibration transmission and airflow noise can be effectively reduced.

Description

Technical Field

[0001] This utility model relates to a ventilator, and more particularly to a fan silencer box structure for ventilator noise reduction. Background Technology

[0002] When a ventilator provides mechanical ventilation to a patient, the airflow generated by the rotating fan blades and the vibration of the fan itself during operation all negatively impact the noise reduction of the ventilator.

[0003] There is currently no vibration damping or noise reduction device.

[0004] In view of the above, this utility model is hereby proposed. Summary of the Invention

[0005] The purpose of this invention is to provide a fan silencer box structure to solve the aforementioned technical problems in the prior art.

[0006] The objective of this utility model is achieved through the following technical solution:

[0007] The present invention relates to a fan silencer box structure in which the fan 5 is installed inside the upper shell 1 and the lower shell 9. The lower part of the lower shell 9 is provided with an air inlet 24. The bottom of the lower shell 9 is provided with a lower shell sound-absorbing cotton 10 and a sound-absorbing box vibration damping sponge 11 in sequence. The top of the lower shell 9 is provided with an upper and lower shell channel 32 that connects the upper and lower shells. A channel 33 composed of the upper shell and the lower shell is provided between the joint surfaces of the upper shell 1 and the lower shell 9. The fan is provided with a fan air inlet 34 and a fan air outlet 35.

[0008] The above components form the following airflow channel:

[0009] Air inlet 24 → Cavity 31 formed by the lower shell sound-absorbing cotton 10 and the sound-absorbing box vibration damping sponge 11 → Upper and lower shell channel 32 → Channel 33 formed by the upper shell and the lower shell → Fan air inlet 34 → Fan air outlet 35.

[0010] Compared with the prior art, the fan silencer box structure provided by this utility model, as part of the ventilator, together with the humidifier, display screen assembly, and shell, constitutes the main body of the ventilator, which can effectively reduce the transmission of vibration and reduce airflow noise. Attached Figure Description

[0011] Figure 1a , Figure 1b These are three-dimensional structural diagrams of the fan silencer box structure provided in the embodiments of this utility model from different angles;

[0012] Figure 2 This is an exploded view of an embodiment of the present utility model;

[0013] Figure 3a , Figure 3b , Figure 3c These are, respectively, a three-dimensional view, a two-dimensional view, and an AA-direction view of the airflow direction of an embodiment of this utility model;

[0014] Figure 4a , Figure 4b These are schematic diagrams of the bottom surface of the lower shell and the BB-direction structure of an embodiment of this utility model;

[0015] Figure 5a , Figure 5b These are schematic diagrams of the upper structure and the CC-direction structure of an embodiment of this utility model, respectively.

[0016] Figure 6 This is a cross-sectional view of an embodiment of the present utility model;

[0017] Figure 7 This is a schematic diagram of the internal fan installation structure of an embodiment of the present utility model;

[0018] Figure 8 This is an exploded view of the internal structure of the upper shell in an embodiment of the present invention.

[0019] In the picture:

[0020] 1. Upper housing; 2. Upper and lower housing seals; 3. Circular sponge for upper housing; 4. Square sponge for upper housing; 5. Fan; 6. Vibration damping spring; 7. Circular sponge for lower housing (to support the fan together with vibration damping spring 6, absorbing vibration and noise); 8. Fan wire seal; 9. Lower housing; 10. Sound-absorbing cotton for lower housing (to form the upper and lower surfaces of the air duct together with the vibration damping sponge 11 of the silencer box, reducing noise); 11. Vibration damping sponge of the silencer box; 12. Air inlet retainer tube; 13. Fan inlet silicone tube; 14. Differential pressure sensor connector; 15. Adapter (one for each of the upper and lower housings); 16. Fan outlet silicone tube; 17. Adhesive-backed sponge for upper housing; 18. Compression seal;

[0021] 19. Gauge pressure sensor interface; 20. Connection to humidifier; 21. Fixing structure; 22. Connection to air filter box; 23. Differential pressure sensor interface; 24. Air inlet; 25. Gauge pressure sensor sampling port; 26. The fan part is supported by the circular sponge and damping spring in the lower housing; 27. The film on the damping sponge of the silencer box is sealed to the lower housing; 28. Multi-pipe channel; 29. ​​The silicone tube of the fan outlet is positioned with the lower housing through a slot.

[0022] 31. Cavity formed by the sound-absorbing cotton of the lower shell and the vibration-damping sponge of the sound-absorbing box; 32. Upper and lower shell channel; 33. Channel formed by the upper shell and the lower shell; 34. Fan air inlet; 35. Fan air outlet. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments, which do not constitute a limitation on the present utility model. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0024] First, the following explanations are provided for the terms that may be used in this article:

[0025] The term "and / or" means that either or both can be achieved simultaneously. For example, X and / or Y means that it includes both "X" or "Y" as well as the three cases of "X and Y".

[0026] The terms "comprising," "including," "containing," "having," or other similar semantic descriptions should be interpreted as non-exclusive inclusion. For example, including a technical feature element (such as raw material, component, ingredient, carrier, dosage form, material, size, part, component, mechanism, device, step, process, method, reaction conditions, processing conditions, parameter, algorithm, signal, data, product or article of manufacture, etc.) should be interpreted as including not only the expressly listed technical feature element, but also other technical feature elements that are not expressly listed and are well-known in the art.

[0027] The term "composed of" excludes any technical features not expressly listed. When used in a claim, it closes the claim to exclude all technical features other than those expressly listed, except for associated conventional impurities. If the term appears only in a clause of a claim, it limits the claim to the elements expressly listed in that clause; elements recited in other clauses are not excluded from the overall claim.

[0028] Unless otherwise explicitly specified or limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this document according to the specific circumstances.

[0029] The terms “center,” “longitudinal,” “lateral,” “length,” “width,” “thickness,” “upper,” “lower,” “front,” “back,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” “outer,” “clockwise,” and “counterclockwise” indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience and simplification of description and do not imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this document.

[0030] The contents not described in detail in the embodiments of this utility model are existing technologies known to those skilled in the art. Where specific conditions are not specified in the embodiments of this utility model, they shall be performed according to conventional conditions in the art or conditions recommended by the manufacturer. Reagents or instruments used in the embodiments of this utility model whose manufacturers are not specified are all conventional products that can be purchased commercially.

[0031] The fan silencer box structure of the present invention includes a fan 5 installed inside an upper shell 1 and a lower shell 9. The lower part of the lower shell 9 is provided with an air inlet 24. The bottom of the lower shell 9 is provided with a lower shell sound-absorbing cotton 10 and a sound-absorbing box vibration damping sponge 11 in sequence. The top of the lower shell 9 is provided with an upper and lower shell channel 32 that connects the upper and lower shells. A channel 33 composed of the upper shell and the lower shell is provided between the joint surfaces of the upper shell 1 and the lower shell 9. The fan is provided with a fan air inlet 34 and a fan air outlet 35.

[0032] The above components form the following airflow channel:

[0033] Air inlet 24 → Cavity 31 formed by the lower shell sound-absorbing cotton 10 and the sound-absorbing box vibration damping sponge 11 → Upper and lower shell channel 32 → Channel 33 formed by the upper shell and the lower shell → Fan air inlet 34 → Fan air outlet 35.

[0034] After the upper shell 1 and the lower shell 9 are assembled, two cavities are formed:

[0035] One is the cavity 31, which is composed of the lower shell 9, the lower shell sound-absorbing cotton 10, and the sound-absorbing box vibration-damping sponge 11. The cavity 31 serves as part of the airflow channel.

[0036] The other is a cavity composed of a lower housing 9 and an upper housing 1, which houses a fan 5, a damping spring 6, and a circular sponge 7 for the lower housing;

[0037] The two cavities are connected by the upper and lower shell channels 32, which are multi-pipe channels.

[0038] The entire fan silencer box is mounted on the silencer box damping sponge 11, and all interfaces with the surrounding structure are connected by silicone parts.

[0039] The air outlet 35 of the fan is assembled with the lower housing 9 through a silicone tube, and the main body of the fan 5 is supported by the circular sponge 7 and the damping spring 6 of the lower housing.

[0040] The upper shell 1 contains an upper shell adhesive sponge 17, an upper shell square sponge 4, and an upper shell round sponge 3, which together form the sound-absorbing structure of the upper shell.

[0041] The impeller inlet of the wind turbine is designed with a conical rectifier structure.

[0042] The upper surface of the sound-absorbing foam 11 is covered with a polypropylene film, which is pressed tightly against the lower shell to form a sealed structure;

[0043] The upper housing 1 and the lower housing 9 are sealed with a rubber coating.

[0044] The lower housing 9 is sealed to the fan wire using an encapsulation process, and the motor wire passes through the fan wire seal.

[0045] The air inlet 24 is sealed to the air filter box through the silicone tube of the fan air inlet.

[0046] The differential pressure sensor is connected to the upper housing 1 and the lower housing 9 via the differential pressure sensor connector 14;

[0047] A gauge pressure sensor sampling port 25 is reserved at the air outlet 35 of the fan, and the gauge pressure sensor is connected through a flexible hose.

[0048] An air inlet seat tube 12 is provided at the air inlet 24. This tube is not detachable after being assembled with the lower housing 9. The upper housing 1 and the lower housing 9 are respectively provided with conversion connectors 15.

[0049] In summary, the fan silencer box structure of this invention mainly comprises an upper shell, a lower shell, a fan and sound-absorbing sponge, a seal, and interfaces with other structures. This structure, as part of a ventilator, together with the humidifier, display screen assembly, and outer shell, constitutes the main unit of the ventilator.

[0050] The fan silencer box structure of the present invention has an air inlet connected to an air filter box and an air outlet connected to a humidifier. It has a differential pressure sensor interface to monitor flow rate and a gauge pressure sensor interface to monitor output pressure, which can effectively reduce vibration transmission and reduce airflow noise.

[0051] To more clearly demonstrate the technical solution and its effects provided by the present invention, the embodiments of the present invention will be described in detail below with reference to specific examples. Example

[0052] like Figures 1a to 8 As shown:

[0053] 1) Main structure as follows Figures 1a to 2 As shown.

[0054] 2) Airflow direction as Figure 3a , Figure 3b , Figure 3c As shown:

[0055] Air inlet → Cavity 31 formed by the lower housing sound-absorbing cotton and the sound-absorbing box vibration damping sponge → Upper and lower housing channel 32 → Channel 33 formed by the upper and lower housings → Fan air inlet 34 → Fan air outlet 35

[0056] The lower shell sound-absorbing cotton and the sound-absorbing box vibration-damping sponge structure are as shown in 4a. Figures 4b to 6 As shown:

[0057] After the lower shell is assembled, two cavities are formed, one consisting of damping foam and the other of sound-absorbing foam from the lower shell. Their main function is to form air passages and reduce noise.

[0058] The other part is the cavity formed by the upper shell, which is used to install the fan and sound-absorbing foam.

[0059] like Figure 7 As shown, the two cavities are connected by a multi-pipeline channel.

[0060] 3) Vibration damping structure:

[0061] The entire fan silencer box is mounted on the damping foam of the silencer box, and the interfaces with the surrounding structure are all connected by silicone parts to minimize the transmission of fan vibration.

[0062] The air outlet of the fan is assembled with the lower housing through the silicone tube of the air outlet. The main body of the fan is supported by the circular sponge in the lower housing and the damping spring. The three together complete the functions of fan support, positioning and vibration damping.

[0063] 4) Noise reduction and sound absorption structure:

[0064] The sound-absorbing cotton in the lower shell and the vibration-damping sponge in the sound-absorbing box together with the lower shell form the air passage;

[0065] The upper and lower shell channels are multi-channel, which plays a role in rectification and noise reduction;

[0066] The upper shell's adhesive-backed sponge, square sponge, and round sponge constitute the sound-absorbing structure of the upper shell;

[0067] The impeller inlet of the fan is designed with a conical flow-rectifying structure to reduce airflow disturbance; Figure 3a , Figure 3b , Figure 3c Arrow 4).

[0068] 5) Sealed structure;

[0069] The upper surface of the sound-absorbing foam in the soundproof box is covered with a polypropylene film, which is pressed tightly against the lower shell to prevent air leakage;

[0070] The upper housing and the upper and lower housings are sealed using a rubber-coating process to ensure a good seal between the upper and lower housings;

[0071] The upper shell and the extrusion seal are made with a rubber coating process to ensure the sealing effect between the air outlet of the silencer and the humidifier;

[0072] The lower housing and the fan wire are sealed with a rubber-coating process, and the motor wire passes through the fan wire seal to ensure the motor wire is sealed.

[0073] The air inlet of the fan silencer box is sealed to the air filter box through a silicone tube at the fan inlet.

[0074] 6) Differential pressure sensor:

[0075] The differential pressure sensor is connected to the upper and lower housings of the fan via a differential pressure sensor connector. It measures the pressure difference between the two chambers on both sides of the upper and lower housing channels and finally converts it into flow rate. The multi-channel pipeline has a rectifying function to ensure the accuracy and stability of the pressure difference measurement between the two chambers.

[0076] 7) Gauge pressure sensor

[0077] A pressure sampling port is reserved at the outlet of the fan silencer box. A gauge pressure sensor is connected via a hose to measure the fan output pressure.

[0078] 8) Other

[0079] The conversion connector and air inlet seat tube are designed to reduce the complexity of mold processing by disassembling the upper and lower shell structures. Once assembled, they cannot be disassembled. Therefore, both integral and separate parts should be included in the protection scope.

[0080] The ventilator assembled using this fan silencer box and humidifier, according to official testing according to relevant standards, has a noise level of no more than 25 dB at a water column pressure of 10 cm.

[0081] The above description is merely a preferred embodiment of this utility model, but the scope of protection of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this utility model should be included within the scope of protection of this utility model. Therefore, the scope of protection of this utility model should be determined by the scope of the claims. The information disclosed in the background section is intended only to enhance the understanding of the overall background technology of this utility model and should not be construed as an admission or implication in any way that such information constitutes prior art known to those skilled in the art.

Claims

1. A fan silencer structure, a fan (5) is installed inside an upper housing (1) and a lower housing (9), a lower part of the lower housing (9) is provided with an air inlet (24), characterized in that, The bottom of the lower shell (9) is provided with a lower shell sound-absorbing cotton (10) and a sound-absorbing box shock-absorbing sponge (11) in sequence, the top of the lower shell (9) is provided with an upper-lower shell passage (32) in communication, the joint surface between the upper shell (1) and the lower shell (9) is provided with a passage (33) composed of the upper shell and the lower shell, and the fan is provided with a fan air inlet (34) and a fan air outlet (35). The above components form the following airflow direction passage: Air inlet (24)→cavity (31) composed of lower shell sound-absorbing cotton (10) and sound-absorbing box shock-absorbing sponge (11)→upper-lower shell passage (32)→passage (33) composed of upper shell and lower shell→fan air inlet (34)→fan air outlet (35).

2. The fan silencer box structure according to claim 1, wherein After the upper shell (1) and the lower shell (9) are assembled, two cavities are formed: One is the cavity (31) composed of the lower shell (9), the lower shell sound-absorbing cotton (10) and the sound-absorbing box shock-absorbing sponge (11), which is part of the airflow direction passage; The other is the cavity composed of the lower shell (9) and the upper shell (1), which is provided with the fan (5) and the shock-absorbing spring (6), and the lower shell circular sponge (7); The two cavities are connected through the upper-lower shell passage (32), and the upper-lower shell passage (32) is a multi-pipeline passage.

3. The fan silencer box structure according to claim 2, wherein The fan sound-absorbing box is integrally mounted on the sound-absorbing box shock-absorbing sponge (11), and the interfaces with the surrounding structure are connected through silica gel pieces; The fan air outlet (35) is assembled with the lower shell (9) through a silica gel pipe, and the fan (5) body is supported by the lower shell circular sponge (7) and the shock-absorbing spring (6) together.

4. The fan silencer box structure according to claim 3, wherein The upper shell (1) is provided with an upper shell back adhesive sponge (17), an upper shell square sponge (4) and an upper shell circular sponge (3), which form the sound-absorbing structure of the upper shell.

5. The fan silencer box structure according to claim 4, wherein A conical flow-straightening structure is designed at the impeller inlet of the fan (5).

6. The fan silencer box structure according to claim 5, wherein The upper surface of the sound-absorbing box shock-absorbing sponge (11) is covered with a polypropylene film, which is pressed against the lower shell to form a sealed structure. A glue-sealed structure is adopted between the upper shell (1) and the lower shell (9). The air inlet (24) is sealed with an air filter box through a fan air inlet silica gel pipe.

7. The fan silencer box structure according to claim 6, wherein The differential pressure sensor is communicated with the upper shell (1) and the lower shell (9) through a differential pressure sensor connecting seat (14). A position of the fan air outlet (35) is reserved for a surface pressure sensor sampling port (25) connected with a surface pressure sensor through a hose.

8. The fan silencer box structure according to claim 7, wherein An air inlet clamping seat pipe (12) is arranged at the air inlet (24), the pipe is not detachable after being assembled with the lower shell (9), and the upper shell (1) and the lower shell (9) are respectively provided with a conversion joint (15).

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