Environment-friendly low-noise ventilation cabinet

Abstract

The utility model discloses an environment-friendly low-noise ventilation cabinet, which comprises a cabinet body, a ventilation box, a pressure exhaust component and filter cotton, and is characterized in that the ventilation box is arranged at the top of the cabinet body, an equipment groove is arranged at the front end in the ventilation box, an air channel is arranged at the rear end in the ventilation box, an air inlet hole is arranged at the bottom of the air channel, and a filter surface is arranged in the air channel; the two pressure exhaust assemblies are symmetrically arranged in the equipment groove and are oppositely arranged, when one pressure exhaust assembly exhausts air from the interior of the air channel, the other pressure exhaust assembly exhausts air, continuous ventilation can be kept, ventilation is conducted through pressure instead of a draught fan, and the ventilation efficiency is improved. Noise generated during ventilation can be effectively reduced, and work of workers is prevented from being affected.

Description

Technical Field

[0001] This utility model relates to the field of fume hood technology, specifically an environmentally friendly, low-noise fume hood. Background Technology

[0002] A laboratory fume hood is a device used for exhaust ventilation in laboratories. Also known as a fume hood, it is one of the most common pieces of equipment in laboratories. Its primary function is exhaust ventilation. In chemical laboratories, various harmful gases, odors, moisture, and flammable, explosive, and corrosive substances are generated during experiments. To protect the safety of users and prevent pollutants from spreading into the laboratory, fume hoods are used near the source of pollution.

[0003] Existing laboratory fume hoods often have the following problems during use: 1. In the laboratory, staff need to work inside the fume hood, and the existing fume hood fans will generate a lot of noise, which can easily affect the work efficiency of the staff; 2. In order to prevent dust from entering the cabinet, existing fume hoods will be equipped with filter cotton inside the cabinet. However, after long-term use, it is inconvenient to replace the filter cotton, and the filter cotton blockage can easily affect the ventilation effect inside the cabinet. Utility Model Content

[0004] The purpose of this section is to outline some aspects of the embodiments of this utility model and to briefly introduce some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be used to limit the scope of this utility model.

[0005] In view of the problems existing in the above and / or existing environmentally friendly low-noise fume hoods, this utility model is proposed.

[0006] Therefore, the purpose of this utility model is to provide an environmentally friendly and low-noise fume hood. By setting a ventilation box on the top of the cabinet, opening an equipment slot at the front end of the ventilation box, opening an air channel at the rear end of the ventilation box, opening an air inlet at the bottom of the air channel, and setting a filter surface inside the air channel, two pressure exhaust components are symmetrically arranged inside the equipment slot. The two pressure exhaust components are arranged opposite each other. When one pressure exhaust component draws air from inside the air channel, the other pressure exhaust component discharges the air, which can maintain continuous ventilation and use pressure for ventilation without using a fan, which can effectively reduce the noise generated during ventilation and prevent it from affecting the work of the staff.

[0007] To solve the above-mentioned technical problems, according to one aspect of the present invention, the present invention provides the following technical solution:

[0008] An environmentally friendly, low-noise fume hood, comprising:

[0009] The cabinet has supporting legs installed at the bottom, an opening in the side wall, a workbench installed in the middle of the interior, and a storage cabinet installed at the bottom of the workbench.

[0010] A ventilation box is installed at the top of the cabinet and directly above the workbench. An equipment slot is opened at the front of the ventilation box, and an air channel is opened at the rear of the ventilation box. Motors are installed on the symmetrical side walls of the cabinet. The output end of the motor extends into the equipment slot and is equipped with a reciprocating threaded rod. An air inlet is opened at the bottom of the air channel.

[0011] Two pressure exhaust components are symmetrically installed inside the equipment slot. When one of the pressure exhaust components draws air from inside the air channel, the other pressure exhaust component exhausts air outward.

[0012] The filter cotton is located inside the air passage.

[0013] As a preferred embodiment of the environmentally friendly, low-noise fume hood described in this utility model, the pressure exhaust assembly includes a housing installed inside the equipment slot and a piston located inside the housing. A fixing rod is installed on the side wall of the piston, and a reciprocating threaded hole is opened at the side end of the fixing rod. The reciprocating threaded rod rotates into the reciprocating threaded hole. A first connecting pipe is installed on the side wall of the housing, and the other end of the first connecting pipe is connected to the interior of the air channel. A first one-way valve is installed on the body of the first connecting pipe. A second connecting pipe is installed on the top of the housing, and the other end of the second connecting pipe extends through the top of the cabinet and out to the outside. A second one-way valve is installed on the body of the second connecting pipe.

[0014] As a preferred embodiment of the environmentally friendly and low-noise fume hood described in this utility model, the rear side wall of the air channel has an opening, the opening has a door panel, the door panel closes the opening, a fixing frame is installed on the side wall of the door panel, the fixing frame is located inside the air channel, and the filter cotton is located inside the fixing frame.

[0015] As a preferred embodiment of the environmentally friendly and low-noise fume hood described in this utility model, a fixing plate is installed on the inner wall of the air channel, a guide groove is opened on the side wall of the fixing plate, and guide plates are installed on the symmetrical side walls of the fixing frame, with the guide plates located inside the guide groove.

[0016] As a preferred embodiment of the environmentally friendly and low-noise fume hood described in this utility model, a horizontal plate is installed on the side wall of the fume hood, and a limiting hole is opened at the top of the horizontal plate.

[0017] As a preferred embodiment of the environmentally friendly and low-noise fume hood described in this utility model, it further includes a limiting component, which includes a fixed frame installed on the side wall of the door panel, a sliding plate slidably connected inside the fixed frame, a spring installed at the bottom of the sliding plate, and a limiting rod installed at the top of the sliding plate. The limiting rod extends through the top of the fixed frame and passes through the limiting hole.

[0018] Compared with existing technologies: By setting a ventilation box at the top of the cabinet, with an equipment slot at the front of the ventilation box and an air channel at the rear, and an air inlet at the bottom of the air channel, and a filter inside the air channel, and symmetrically arranging two pressure exhaust components inside the equipment slot, the two pressure exhaust components are positioned opposite each other. When one pressure exhaust component draws air from inside the air channel, the other pressure exhaust component discharges the air, which can maintain continuous ventilation and utilize pressure ventilation without the use of a fan, effectively reducing the noise generated during ventilation and preventing interference with the work of staff. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this utility model, the present utility model will be described in detail below with reference to the accompanying drawings and detailed embodiments. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:

[0020] Figure 1 This is a structural diagram of an environmentally friendly, low-noise fume hood according to the present invention.

[0021] Figure 2 This is a partial structural diagram of an environmentally friendly, low-noise fume hood according to the present invention;

[0022] Figure 3 This is a structural diagram of an environmentally friendly, low-noise fume hood ventilation box according to the present invention;

[0023] Figure 4 This is a structural diagram of an environmentally friendly, low-noise fume hood pressure exhaust assembly according to this utility model;

[0024] Figure 5 This is a structural diagram of an environmentally friendly, low-noise fume hood filter cotton according to the present invention;

[0025] Figure 6 This is a structural diagram of the limiting assembly of an environmentally friendly, low-noise fume hood according to this utility model. Detailed Implementation

[0026] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0027] Secondly, this utility model is described in detail with reference to the schematic diagrams. When describing the embodiments of this utility model, for ease of explanation, the cross-sectional views showing the device structure may be partially enlarged, not according to the usual proportions. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of this utility model. In addition, actual manufacturing should include the three-dimensional spatial dimensions of length, width, and depth.

[0028] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0029] This utility model provides an environmentally friendly, low-noise fume hood. A ventilation box is installed at the top of the hood, with an equipment slot at the front end and an air channel at the rear. An air inlet is located at the bottom of the air channel, which contains a filter. Two pressure exhaust components are symmetrically arranged inside the equipment slot, facing each other. When one pressure exhaust component draws air from the air channel, the other exhausts the air, maintaining continuous ventilation. Ventilation is achieved through pressure without the use of a fan, effectively reducing noise during ventilation and preventing disruption to workers' work.

[0030] Example 1

[0031] Regarding the problem 1 that needs to be solved: In the laboratory, staff need to work inside the fume hood, and the existing fume hood fans will generate a lot of noise, which can easily affect the work efficiency of the staff.

[0032] The solution is as follows: An environmentally friendly, low-noise fume hood in this embodiment includes a cabinet 100, a ventilation box 200, a pressure exhaust assembly 300, and a filter cotton 400.

[0033] The cabinet 100 is equipped with support legs at the bottom and has an opening on the side wall. A workbench 110 is installed in the middle of the interior of the cabinet 100, and a storage cabinet 120 is installed at the bottom of the workbench 110. The support legs at the bottom of the cabinet 100 are used to separate the cabinet 100 from the ground to prevent water from the ground from affecting the cabinet 100. Workers work on the top of the workbench 110.

[0034] The ventilation box 200 is installed at the top inside the cabinet 100 and directly above the workbench 110. An equipment slot 210 is opened at the front inside the ventilation box 200, and an air channel 220 is opened at the rear inside the ventilation box 200. A motor 230 is installed on the symmetrical side wall of the cabinet 100. The output end of the motor 230 extends into the equipment slot 210 and is equipped with a reciprocating threaded rod 240. An air inlet 250 is opened at the bottom of the air channel 220. A filter cotton 400 is located inside the air channel 220. Air enters the air channel 220 through the air inlet 250. The air inlet 250 has a dustproof screen inside, which performs primary filtration on the air entering the air channel 220. After the air enters the air channel 220, the filter cotton 400 performs secondary filtration on the air.

[0035] Two pressure exhaust assemblies 300 are symmetrically installed inside the equipment slot 210. When one pressure exhaust assembly 300 draws air from inside the air passage 220, the other pressure exhaust assembly 300 exhausts air outward. Each pressure exhaust assembly 300 includes a housing 310 installed inside the equipment slot 210 and a piston 320 located inside the housing 310. A fixing rod 330 is installed on the side wall of the piston 320, and a reciprocating threaded hole 340 is opened at the side end of the fixing rod 330. The reciprocating threaded rod 340 rotates into the reciprocating threaded hole 340. A first connecting pipe 350 is installed on the side wall of the housing 310. The other end of the first connecting pipe 350 is connected to the inside of the air passage 220. A first one-way valve 360 ​​is installed on the body of the first connecting pipe 350. A second connecting pipe 370 is installed on the top of the housing 310. The other end of the second connecting pipe 370 extends through the top of the cabinet 100 and extends to the outside. The pipe body is equipped with a second one-way valve 380. The starting motor 230 drives the reciprocating threaded rod 240 to rotate. When the reciprocating threaded rod 240 rotates, it uses a screw structure to push the piston 320 to move back and forth inside the housing 310. When the piston 320 moves to the outside of the housing 310, the first one-way valve 360 ​​opens and the second one-way valve 380 closes. Air enters the housing 310 through the first connecting pipe 350. When the piston 320 moves to the inside of the housing 310, the first one-way valve 360 ​​closes and the second one-way valve 380 opens. Air inside the housing 310 is discharged to the outside through the second connecting pipe 370. In this application, the strokes of the two pistons 320 are always opposite. When one piston 320 moves to the inside of the housing 310, the other piston 320 moves to the outside of the housing 310, which can ensure the continuous discharge of air from the air passage 220 and achieve a continuous ventilation effect.

[0036] Example 2

[0037] Regarding the second problem to be solved above: In order to prevent dust from entering the cabinet, existing fume hoods are equipped with filter cotton inside. However, after long-term use, it is inconvenient to replace the filter cotton, and the clogging of the filter cotton can easily affect the ventilation effect inside the cabinet.

[0038] The solution is as follows: An environmentally friendly, low-noise fume hood in this embodiment also includes a limiting component 500.

[0039] The rear side wall of the air duct 220 has an opening, and a door panel 410 is provided at the opening. The door panel 410 closes the opening. A fixing bracket 420 is installed on the side wall of the door panel 410, and the fixing bracket 420 is located inside the air duct 220. The filter cotton 400 is located inside the fixing bracket 420. A fixing plate 260 is installed on the inner wall of the air duct 220. A guide groove 270 is opened on the side wall of the fixing plate 260. A guide plate 430 is installed on the symmetrical side wall of the fixing bracket 420, and the guide plate 430 is located inside the guide groove 270. A horizontal plate 280 is installed on the side wall of the ventilation box 200. A limit hole 290 is opened at the top of the horizontal plate 280. It also includes a limit assembly 500. The limit assembly 500 includes a fixing frame 510 installed on the side wall of the door panel 410, a sliding plate 520 slidably connected inside the fixing frame 510, a spring 530 installed at the bottom of the sliding plate 520, and a limit rod 540 installed at the top of the sliding plate 520. The limit rod 540 extends through and out of the top of the fixing frame 510. The limit rod 540 passes through the limiting hole 290. When the filter cotton 400 needs to be replaced, pull the sliding plate 520 downward and squeeze the spring 530. The limiting rod 540 moves downward with the sliding plate 520 and retracts into the fixed frame 510. At this time, the limiting rod 540 separates from the limiting hole 290. Pull the door panel 410 to drive the fixed frame 420 and the filter cotton 400 out from the tail opening of the ventilation box 200. After replacing the filter cotton 400, push the door panel 410 to drive the fixed frame 420 and the filter cotton 400 into the air channel 220 until the filter cotton 400 seals the opening of the air channel 220. At this time, the horizontal plate 280 is above the fixed frame 510. Release the sliding plate 520, and the spring 530 rebounds to push the sliding plate 520 and the limiting rod 540 upward. The limiting rod 540 passes through the limiting hole 290, which can limit and fix the filter cotton 400 inside the air channel 220, making it convenient to disassemble and replace the filter cotton 400.

[0040] Although the present invention has been described above with reference to embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the features in the embodiments disclosed in this invention can be combined with each other in any way. The lack of an exhaustive description of these combinations in this specification is merely for the sake of brevity and resource conservation. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. An environmentally friendly, low-noise fume hood, characterized in that, include: A cabinet (100) is provided with supporting legs at the bottom. The cabinet (100) has an opening on its side wall. A workbench (110) is installed in the middle of the interior of the cabinet (100). A storage cabinet (120) is installed at the bottom of the workbench (110). A ventilation box (200) is installed at the top of the cabinet (100) and directly above the workbench (110). An equipment slot (210) is opened at the front of the ventilation box (200), and an air channel (220) is opened at the rear of the ventilation box (200). A motor (230) is installed on the symmetrical sidewalls of the cabinet (100). The output end of the motor (230) extends into the equipment slot (210) and is equipped with a reciprocating threaded rod (240). An air inlet hole (250) is opened at the bottom of the air channel (220). Two pressure exhaust assemblies (300) are symmetrically installed inside the equipment slot (210). When one of the pressure exhaust assemblies (300) draws air from inside the air passage (220), the other pressure exhaust assembly (300) exhausts air outward. The filter cotton (400) is located inside the air channel (220).

2. The environmentally friendly, low-noise fume hood according to claim 1, characterized in that, The pressure exhaust assembly (300) includes a housing (310) installed inside the equipment slot (210) and a piston (320) located inside the housing (310). A fixing rod (330) is installed on the side wall of the piston (320). A reciprocating threaded hole (340) is opened on the side end of the fixing rod (330). The reciprocating threaded rod (240) rotates into the reciprocating threaded hole (340). A first connecting pipe (350) is installed on the side wall of the housing (310). The other end of the first connecting pipe (350) is connected to the inside of the air channel (220). A first one-way valve (360) is installed on the body of the first connecting pipe (350). A second connecting pipe (370) is installed on the top of the housing (310). The other end of the second connecting pipe (370) extends through the top of the cabinet (100) and extends to the outside. A second one-way valve (380) is installed on the body of the second connecting pipe (370).

3. The environmentally friendly, low-noise fume hood according to claim 2, characterized in that, The air channel (220) has an opening on its rear side wall, and a door panel (410) is provided at the opening. The door panel (410) closes the opening. A fixing bracket (420) is installed on the side wall of the door panel (410). The fixing bracket (420) is located inside the air channel (220), and the filter cotton (400) is located inside the fixing bracket (420).

4. The environmentally friendly, low-noise fume hood according to claim 3, characterized in that, A fixing plate (260) is installed on the inner wall of the air channel (220). A guide groove (270) is opened on the side wall of the fixing plate (260). A guide plate (430) is installed on the symmetrical side wall of the fixing frame (420). The guide plate (430) is located inside the guide groove (270).

5. The environmentally friendly, low-noise fume hood according to claim 4, characterized in that, A horizontal plate (280) is installed on the side wall of the ventilation box (200), and a limit hole (290) is provided on the top of the horizontal plate (280).

6. The environmentally friendly, low-noise fume hood according to claim 5, characterized in that, It also includes a limiting component (500), which includes a fixed frame (510) installed on the side wall of the door panel (410), a sliding plate (520) slidably connected inside the fixed frame (510), a spring (530) installed at the bottom of the sliding plate (520), and a limiting rod (540) installed at the top of the sliding plate (520). The limiting rod (540) extends through the top of the fixed frame (510) and through the limiting hole (290).

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