Silencing and smoke removing cabinet

Abstract

The utility model discloses a noise reduction smoke removal cabinet which comprises a cabinet body, a filter cavity is formed in the upper end of the interior of the cabinet body, an air inlet communicated with the filter cavity is formed in the top of the cabinet body, an air inlet net cover is installed on the air inlet, a plurality of filter screens are installed in the filter cavity from top to bottom, and a noise reduction cavity is formed below the filter cavity. A fan assembly is installed between the filtering cavity and the silencing cavity, an air outlet communicated with the silencing cavity is formed in the lower end of the front side of the cabinet body, an air outlet net cover is installed on the air outlet, a first guide plate and a second guide plate are arranged in the silencing cavity, the first guide plate is located above the second guide plate, and a through groove is formed in the front side, corresponding to the cabinet body, of the first guide plate; the second guide plate is provided with a through groove corresponding to the rear side of the cabinet body. Through the arrangement of the first guide plate and the second guide plate, outlet air is in an S shape, and therefore noise reduction of the outlet air is achieved.

Description

Technical Field

[0001] This utility model belongs to the field of smoke removal cabinet technology, specifically relating to a noise-reducing smoke removal cabinet. Background Technology

[0002] Smoke cabinets are common products on the market. Their main function is to use a fan to draw in polluted indoor air, pass it through various filters (for dust removal, odor removal, sterilization, etc.), and then discharge it from a specific vent.

[0003] Wind noise mainly occurs when the fan is running at high speed. Different filters have different internal gaps. When the wind passes through the gaps in the filter or other narrow holes at high speed, the airflow will be obstructed, forming eddies and vibrating on the surface of the obstacle, thus creating a whistling sound.

[0004] Products on the market focus on removing smoke and odors, but neglect the impact of wind noise on the user experience.

[0005] Therefore, there is an urgent need for a noise-reducing and smoke-removing cabinet. Utility Model Content

[0006] The purpose of this utility model is to provide a noise-reducing and smoke-eliminating cabinet to solve the problems mentioned in the background art. The noise-reducing and smoke-eliminating cabinet provided by this utility model has the characteristics of noise reduction.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a silencer and smoke-removing cabinet, comprising a cabinet body, a filter chamber at the upper end of the cabinet body, an air inlet communicating with the filter chamber at the top of the cabinet body, an air inlet mesh cover installed on the air inlet, a plurality of filters installed from top to bottom inside the filter chamber, a silencer chamber below the filter chamber, a fan assembly installed between the filter chamber and the silencer chamber, an air outlet communicating with the silencer chamber at the lower end of the front side of the cabinet body, an air outlet mesh cover installed on the air outlet, a first guide plate and a second guide plate inside the silencer chamber, wherein the first guide plate is located above the second guide plate, the first guide plate has a through groove corresponding to the front side of the cabinet body, and the second guide plate has a through groove corresponding to the rear side of the cabinet body.

[0008] To further reduce the noise generated by the fan operation and the noise generated by the air blowing against the inner wall of the cabinet, sound-absorbing cotton corresponding to the fan assembly is installed on the four inner walls of the sound-absorbing cavity.

[0009] To accommodate the installation of filters of different specifications and functions, filter mounting seats are further installed on the inner walls of both sides of the filter chamber, and the filter mounting seats are provided with several mounting slots of different heights.

[0010] In order to receive signals from the micro switch and the detection module and control the operation of the fan, an electrical cavity is further provided on the rear side of the cabinet corresponding to the filter cavity, and a control board is installed inside the electrical cavity.

[0011] In order to control the fan to increase the air volume when the PM2.5 content of the incoming air exceeds the set threshold, a detection module is further installed above the partition of the electrical cavity.

[0012] To facilitate cleaning or replacement of the filter, the front of the cabinet is further hinged with a door corresponding to the filter chamber.

[0013] In order to be linked with the door and to cut off the power when the door is opened, a micro switch corresponding to the edge of the door is further installed on the cabinet.

[0014] To facilitate ventilation, the fan assembly further includes a mounting bracket, which is installed in the middle position below the partition between the filter chamber and the silencer chamber. The partition has a circular hole corresponding to the fan, and the fan is mounted on the mounting bracket. The mounting bracket has through slots on all four sides.

[0015] To ensure that the airflow blowing towards the bottom is not lost and to guarantee the heat dissipation of the fan, several through holes are provided on the base plate of the mounting bracket.

[0016] To further reduce noise, sound-absorbing mesh panels are installed at the bottom of the second guide plate and above the bottom plate of the cabinet.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] 1. This utility model achieves noise reduction of the air outlet by setting the first guide plate and the second guide plate to make the air outlet oriented in an "S" shape;

[0019] 2. The air inlet of this utility model is equipped with an air inlet mesh cover. The mesh diameter of the air inlet mesh cover is 5mm, which can prevent children's fingers from sticking in and prevent whistling noise caused by the air inlet being too small, thus achieving noise reduction of the air inlet.

[0020] 3. The four inner walls of the silencing cavity of this utility model are provided with silencing cotton corresponding to the fan assembly, so as to silencing the noise generated by the fan operation and the noise generated by the wind blowing on the inner wall of the cabinet.

[0021] 4. The filter chamber of this utility model has filter screen mounting seats installed on both sides of the inner wall. The filter screen mounting seats are provided with several mounting grooves of different heights, which are suitable for the installation of filters of different specifications and functions.

[0022] 5. The cabinet of this utility model is equipped with a micro switch corresponding to the edge of the door. The micro switch is linked to the door to realize the power cut-off when the door is opened.

[0023] 6. The mounting bracket of this utility model has four through holes on its base plate, which ensures that the air blown to the bottom will not be lost and also ensures the heat dissipation of the fan.

[0024] 7. The bottom of the second guide plate and the top of the cabinet bottom plate of this utility model are respectively equipped with sound-absorbing mesh plates, which further reduce noise. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of this utility model;

[0026] Figure 2 This is a cross-sectional view of the filter screen after it has been removed.

[0027] Figure 3 This is a schematic diagram of the structure of the fan assembly of this utility model.

[0028] In the diagram: 1. Cabinet; 2. Air outlet mesh cover; 3. Micro switch; 4. Door; 5. Filter; 6. Air inlet mesh cover; 7. Filter mounting base; 8. Detection module; 9. Inspection door; 10. Electrical cavity; 11. Control board; 12. First guide plate; 13. Silencing cavity; 14. Silencing mesh plate; 15. Second guide plate; 16. Fan assembly; 161. Mounting bracket; 162. Fan; 163. Through hole; 164. Mounting hole; 17. Sound-absorbing cotton; 18. Filter cavity. Detailed Implementation

[0029] 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. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] Example 1

[0031] Please see Figures 1-3This utility model provides the following technical solution: a silencer and smoke-removing cabinet, including a cabinet body 1. The upper part of the cabinet body 1 has a filter chamber 18 for installing filter screens 5. The top of the cabinet body 1 has an air inlet communicating with the filter chamber 18. An air inlet mesh cover 6 is installed on the air inlet. The mesh diameter of the air inlet mesh cover 6 is 5mm, which can prevent children's fingers from sticking in and prevent whistling noise caused by the small air inlet, thus achieving silencer operation. Three filter screens 5 are installed inside the filter chamber 18 from top to bottom. The three filter screens 5, from top to bottom, are a coarse filter, an activated carbon odor-removing filter, and a high-efficiency filter. Below the filter chamber 18 is a silencing chamber 13. A partition is provided between the filter chamber 18 and the silencing chamber 13. A fan assembly 16 is installed below the partition. An air outlet communicating with the silencing chamber 13 is provided at the lower front side of the cabinet 1. An air outlet cover 2 is installed on the air outlet. The mesh diameter of the air outlet cover 2 is also 5mm. Inside the silencing chamber 13 are a first guide plate 12 and a second guide plate 15. The first guide plate 12 is located above the second guide plate 15. The first guide plate 12 has a through groove corresponding to the front side of the cabinet 1, and the second guide plate 15 has a through groove corresponding to the rear side of the cabinet 1.

[0032] By adopting the above technical solution, the present invention, through the setting of the first guide plate 12 and the second guide plate 15, makes the air outlet oriented in an "S" shape, so that the wind noise is continuously reflected and refracted, consuming a large amount of energy, thereby achieving noise reduction of the air outlet.

[0033] Specifically, the four inner walls of the silencing cavity 13 are provided with sound-absorbing cotton 17 corresponding to the fan assembly 16.

[0034] By adopting the above technical solution, the noise generated by the operation of the fan 162 and the noise generated by the wind blowing on the inner wall of the cabinet 1 can be reduced.

[0035] Specifically, an electrical cavity 10 is provided inside the filter cavity 18 corresponding to the rear side of the cabinet 1. The electrical cavity 10 is separated from the filter cavity 18 by a partition. A control board 11 is installed inside the electrical cavity 10. The control board 11 is a DJH-7115B type Lichi motor control board.

[0036] The above technical solution is used to receive signals from the micro switch 3 and the detection module 8 and to control the operation of the fan 162.

[0037] Specifically, a maintenance door 9 corresponding to the electrical cavity 10 is installed on the rear side of the cabinet 1.

[0038] By adopting the above technical solution, maintenance can be carried out more easily.

[0039] Specifically, a detection module 8 is installed above the partition of the electrical cavity 10. The detection module 8 is a PM2.5 detection module, and the PM2.5 detection module uses a TZH03 dust sensor.

[0040] By adopting the above technical solution, when the PM2.5 content detected in the incoming air exceeds the set threshold, the fan 162 is controlled to increase the air volume.

[0041] Specifically, the front side of the cabinet 1 is hinged with a door 4 corresponding to the filter chamber 18.

[0042] By adopting the above technical solution, it is easy to clean or replace filter 5.

[0043] Specifically, the fan assembly 16 includes a mounting bracket 161, which is installed in the middle position below the partition between the filter chamber 18 and the silencer chamber 13. The partition has a round hole corresponding to the fan 162. The fan 162 is installed on the mounting bracket 161. The four sides of the mounting bracket 161 are provided with through slots. The fan 162 is a German Böhler BL-B190B-EC-02 model.

[0044] The above-mentioned technical solution is used for ventilation.

[0045] Example 2

[0046] The difference between this embodiment and embodiment 1 is that, specifically, filter mounting seats 7 are installed on the inner walls of both sides of the filter chamber 18, and the filter mounting seats 7 are provided with a number of mounting grooves of different heights.

[0047] By adopting the above technical solution, it is applicable to the installation of filter screens 5 of different specifications and functions.

[0048] Example 3

[0049] The difference between this embodiment and embodiment 1 is that, specifically, a micro switch 3 corresponding to the edge of the door 4 is installed on the cabinet 1. The micro switch 3 is a normally open two-pronged waterproof MAK-B type IBAOIP67 micro switch from Yibao.

[0050] By adopting the above technical solution, the power is cut off when the door is opened by linking the micro switch 3 with the door body 4.

[0051] Example 4

[0052] The difference between this embodiment and embodiment 1 is that, specifically, the base plate of the mounting bracket 161 is provided with four through holes 163.

[0053] By adopting the above technical solution, the air blown to the bottom will not be lost, and the heat dissipation of the fan 162 can also be guaranteed.

[0054] Specifically, mounting holes 164 are provided on the base plate of mounting bracket 161.

[0055] The above technical solution is used to fix the power cord of the fan 162.

[0056] Example 5

[0057] The difference between this embodiment and embodiment 1 is that, specifically, a sound-absorbing mesh plate 14 is installed at the bottom of the second guide plate 15 and above the bottom plate of the cabinet 1. The sound-absorbing mesh plate 14 is formed by bending a perforated metal plate with a thickness of less than 1 mm. The mesh diameter of the perforated plate is 0.5-1 mm and the perforation rate is 0.5%-5%. The cavity inside the sound-absorbing mesh plate 14 forms a Helmholtz resonance structure to achieve the maximum sound absorption effect.

[0058] By adopting the above technical solution, further noise reduction is achieved through the noise reduction mesh plate 14.

[0059] It should be noted that the fan used in this utility model blows air horizontally in all directions. It can also be replaced with a fan that blows air directly downwards, so that sound-absorbing cotton is not required, but the sound absorption effect will be worse.

[0060] In summary, this utility model, through the arrangement of the first guide plate 12 and the second guide plate 15, makes the air outlet oriented in an "S" shape, thereby achieving noise reduction of the air outlet; the air inlet of this utility model is equipped with an air inlet mesh cover 6, the mesh diameter of which is 5mm, which can prevent children's fingers from sticking in and also prevent whistling sound caused by the air inlet being too small, thus achieving noise reduction of the air inlet; the four inner walls of the noise reduction cavity 13 of this utility model are provided with noise reduction cotton 17 corresponding to the fan assembly 16, thereby reducing the noise generated by the operation of the fan 162 and the noise generated by the wind blowing on the inner wall of the cabinet 1; the two filters of the filter cavity 18 of this utility model... A filter mounting base 7 is installed on the inner side wall. The filter mounting base 7 has several mounting slots of different heights, which are suitable for the installation of filters 5 of different specifications and functions. A micro switch 3 corresponding to the edge of the door 4 is installed on the cabinet body 1. The micro switch 3 is linked to the door 4 to realize the power cut-off when the door is opened. The bottom plate of the mounting bracket 161 of this utility model has four through holes 163, so that the air blown to the bottom will not be lost, and the heat dissipation of the fan 162 can also be guaranteed. The bottom of the second guide plate 15 and the top of the bottom plate of the cabinet body 1 are respectively installed with sound-absorbing mesh plates 14, which further reduce noise.

[0061] Although embodiments of the present 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 present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A sound attenuating fume extraction cabinet comprising a cabinet body, characterised in that: The upper part of the cabinet is equipped with a filter chamber, and the top of the cabinet is equipped with an air inlet that communicates with the filter chamber. An air inlet screen is installed on the air inlet. Several filters are installed inside the filter chamber from top to bottom. A silencer chamber is located below the filter chamber. A fan assembly is installed between the filter chamber and the silencer chamber. An air outlet that communicates with the silencer chamber is located at the lower front of the cabinet. An air outlet screen is installed on the air outlet. The silencer chamber is equipped with a first guide plate and a second guide plate. The first guide plate is located above the second guide plate. The first guide plate has a through groove on the front side of the cabinet, and the second guide plate has a through groove on the rear side of the cabinet.

2. A sound attenuating fume exhaust hood according to claim 1 wherein: The four inner walls of the silencing cavity are each provided with sound-absorbing cotton corresponding to the fan assembly.

3. A sound attenuating fume exhaust hood according to claim 1 wherein: Filter mounting seats are installed on the inner walls of both sides of the filter chamber, and the filter mounting seats are provided with several mounting slots of different heights.

4. A sound attenuating fume exhaust hood according to claim 1 wherein: An electrical cavity is located on the rear side of the cabinet within the filter chamber, and a control board is installed inside the electrical cavity.

5. A sound attenuating fume exhaust hood according to claim 4 wherein: A detection module is installed above the partition of the electrical cavity.

6. A sound attenuating fume exhaust hood according to claim 1 wherein: The cabinet has a door hinged to the front side, corresponding to the filter chamber.

7. A sound attenuating fume exhaust hood according to claim 6 wherein: The cabinet is equipped with microswitches corresponding to the edges of the doors.

8. A sound attenuating fume exhaust hood according to claim 1 wherein: The fan assembly includes a mounting bracket, which is installed in the middle position below the partition between the filter chamber and the sound-absorbing chamber. The partition has a circular hole corresponding to the fan. The fan is installed on the mounting bracket, and through slots are provided on all four sides of the mounting bracket.

9. A sound attenuating fume exhaust hood according to claim 8 wherein: The mounting bracket has several through holes on its base plate.

10. A noise-reducing and smoke-removing cabinet according to claim 1, characterized in that: Sound-absorbing mesh panels are installed at the bottom of the second guide plate and at the top of the cabinet bottom plate.

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