Laboratory fume hood air guide structure

Abstract

The utility model relates to the technical field of laboratory ventilation, and discloses a laboratory ventilation cabinet air guide structure which comprises a cabinet body, an air inlet pipe is fixedly installed on the top of the cabinet body, and the inner side and the outer side of the cabinet body are fixedly connected with flow limiting cleaning assemblies. According to the air guide structure of the laboratory fume hood, the screw rod and the internal thread ring are arranged, and the height of the supporting plate in the hood body is controlled through threaded connection, so that the distance between the sealing plug and the ventilation hole is controlled by a user, and the user can conveniently conduct ventilation according to the requirement for the internal temperature of a laboratory. The size of a hole between the inner wall of the ventilation hole and the outer surface of the conical block is adjusted, then the flow speed of airflow entering a laboratory is increased, the use convenience of the laboratory ventilation cabinet is improved, meanwhile, the heights of the supporting plate and the sealing plug are limited through threaded connection of the threaded rod and the inner threaded ring, composition structures are reduced, and the use cost is reduced. Therefore, the use of a user is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of laboratory ventilation, in particular to an air guide structure of a laboratory fume hood. Background Art

[0002] Laboratory fume hoods are typical cabinet exhaust hood structures. The working opening of the fume hood has a great influence on the airflow distribution inside the hood, and the airflow distribution directly affects the working effect of the cabinet exhaust hood. A well-designed local air guide structure can achieve the best control effect with a smaller air volume. The air outlet of a general fume hood is connected to the laboratory ventilation system or to the outdoors.

[0003] For example, the air guide structure of a laboratory fume hood with Chinese patent number CN218191619U, in which the dynamic ventilation holes on the dynamic air guide plate are cleared and cleaned by a clearing rod to avoid the influence of dust. However, in the utility model, the air flow speed inside the fume hood cannot be adjusted according to the laboratory needs when guiding the air, resulting in certain limitations in use. At the same time, the movable limiting structure in the utility model is relatively bulky and complicated, which greatly increases the use cost of the fume hood. In addition, the clearing rod has a fixed direction, and dust is easily mixed between the fixed air guide plate and the dynamic air guide plate during cleaning, affecting the cleaning effect. The fixed ventilation holes on the fixed air guide plate cannot be cleaned, further reducing the cleaning effect, which is not conducive to the user's use. Therefore, a laboratory fume hood air guide structure is proposed to solve the above problems. Utility Model Content

[0004] 1. Technical issues to be solved

[0005] In view of the shortcomings of the prior art, the utility model provides an air guide structure for a laboratory fume hood, which has the advantages of easy cleaning and flow rate adjustment, and solves the problems in the comparative documents that the air flow rate inside the fume hood cannot be adjusted according to laboratory needs, and the structure is bloated and complicated, difficult to clean, and has high cost of use.

[0006] (II) Technical solution

[0007] To achieve the above object, the utility model provides the following technical solutions: a laboratory fume hood air guide structure, comprising a cabinet body, an air inlet pipe is fixedly installed on the top of the cabinet body, and a limited flow cleaning component is fixedly connected to the inner and outer sides of the cabinet body;

[0008] The current limiting cleaning assembly includes a rectangular hole, a waterproof breathable membrane, an ash guide plate, a collection box, a square bucket, an air guide plate, a ventilation hole, an internal threaded ring, a screw, a support plate and a sealing plug. A rectangular hole is provided on the right side of the cabinet, a waterproof breathable membrane is fixedly installed inside the rectangular hole, an ash guide plate is fixedly installed on the inner right wall of the cabinet, a collection box is fixedly installed on the left side of the ash guide plate, a square bucket is fixedly installed inside the cabinet, an air guide plate is fixedly installed inside the square bucket, no less than five ventilation holes are provided on the air guide plate, an internal threaded ring is movably connected to the top of the cabinet, the internal thread of the internal threaded ring is connected to a screw, the bottom of the screw is rotatably connected to a support plate, and no less than five sealing plugs are fixedly installed on the bottom of the support plate.

[0009] Furthermore, the number of the sealing plugs is the same as the number of the ventilation holes, and the sealing plugs are located directly above the ventilation holes, and the size of the sealing plugs is matched with the size of the ventilation holes.

[0010] Furthermore, a conical block is installed at the bottom of the sealing plug, a sealing door is hinged on the left side of the cabinet, and the square bucket is located above the ash guide plate.

[0011] Furthermore, an annular slide block is installed at the bottom of the internal thread ring, an annular slide groove is opened at the top of the cabinet, and the annular slide block is slidably connected to the annular slide groove.

[0012] Furthermore, a circular hole is opened on the inner top wall of the cabinet, the screw rod passes through the circular hole and extends to the inside of the cabinet, and the support plate is located directly above the air guide plate.

[0013] Furthermore, a sliding rod is installed on the top of the support plate, a sliding hole is opened on the inner top wall of the cabinet, the sliding rod passes through the sliding hole and extends to the outside of the cabinet, and is slidably connected with the sliding hole.

[0014] (III) Beneficial effects

[0015] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0016] 1. The air guide structure of the laboratory fume hood is provided with a screw rod and an internal threaded ring, and the height of the support plate inside the cabinet is controlled by a threaded connection, so that the distance between the sealing plug and the ventilation hole is controlled by the user, so that the user can adjust the pore size between the inner wall of the ventilation hole and the outer surface of the conical block according to the requirements of the internal temperature of the laboratory, thereby increasing the flow rate of the airflow entering the laboratory, and improving the convenience of using the laboratory fume hood. At the same time, the threaded connection between the screw rod and the internal threaded ring is used to limit the height of the support plate and the sealing plug, thereby reducing the component structure, reducing the cost of use, and thus facilitating the use of the user.

[0017] 2. The air guide structure of the laboratory fume hood adopts a waterproof breathable membrane, an ash guide plate and a collection box, so that the dust falling from the self-sealing hole and the dust separated from the waterproof breathable membrane can fall onto the ash guide plate due to gravity and then slide into the inside of the collection box, thereby facilitating the user's cleaning. At the same time, in conjunction with the sealed door opened on the left side of the cabinet, while ensuring the stability of the air guide, it is convenient for the user to open the sealed door to clean the collection box, the ash guide plate and the waterproof breathable membrane, reducing the difficulty of cleaning and further facilitating the user's use. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0019] Figure 2 This is a front cross-sectional view of the utility model;

[0020] Figure 3 For this utility model Figure 2 Enlarged view of point A in the middle.

[0021] In the figure: 1. cabinet; 2. air inlet pipe; 3. current limiting cleaning component; 301. rectangular hole; 302. waterproof breathable membrane; 303. ash guide plate; 304. collection box; 305. square bucket; 306. air guide plate; 307. ventilation hole; 308. internal thread ring; 309. screw; 310. support plate; 311. sealing plug. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] See also Figure 1-3 A laboratory fume hood air guide structure in this embodiment includes a cabinet body 1, an air inlet pipe 2 is fixedly installed on the top of the cabinet body 1, and a limited flow cleaning component 3 is fixedly connected to the inner and outer sides of the cabinet body 1.

[0024] exist Figure 2 and Figure 3In the figure, the flow limiting cleaning component 3 is composed of a rectangular hole 301, a waterproof breathable membrane 302, an ash guide plate 303, a collection box 304, a square bucket 305, an air guide plate 306, a ventilation hole 307, an internal threaded ring 308, a screw 309, a support plate 310 and a sealing plug 311. A rectangular hole 301 is opened on the right side of the cabinet 1 for exhausting the cabinet 1. A waterproof breathable membrane 302 is installed inside the rectangular hole 301 to separate dust and impurities in the gas to ensure the environment in the laboratory. An ash guide plate 303 is installed on the inner right wall of the cabinet 1 to guide the dust to slide into the collection box 304. A collection box 304 is installed on the left side of the ash guide plate 303 to concentrate the dust for easy cleaning. A square bucket 305 is installed inside the cabinet 1 to gather the air flow to pass through the ventilation hole 307 and allow the dust to be blown away by the air flow. An air guide plate 306 is installed inside the square bucket 305 to block the opening at the bottom of the square bucket 305 so that the airflow can only leave through the ventilation hole 307. No less than five ventilation holes 307 are opened on the air guide plate 306 to facilitate the airflow to pass through. An internal threaded ring 308 is connected to the top of the cabinet 1 for driving the support screw 309 to rotate. The internal thread of the internal threaded ring 308 is connected to the screw 309 for driving the support plate 310 to move up and down. The bottom of the screw 309 is rotatably connected to the support plate 310 to prevent its own rotation from affecting the support plate 310, driving the sealing plug 311 to enter the ventilation hole 307 or move away from the ventilation hole 307. No less than five sealing plugs 311 are installed at the bottom of the support plate 310 to block the ventilation hole 307 and push out the dust attached to the inner wall of the ventilation hole 307 to prevent clogging.

[0025] It should be noted that this section is intended to provide a background or context for the implementation methods stated in the claims, and detailed descriptions of known functions and known components are omitted. At the same time, fixed and movable installations are determined according to actual application methods. To ensure the compatibility of the equipment, the operating methods used are consistent with the parameters of marketed equipment. The description here is not admitted to be prior art because it is included in this section.

[0026] When implementing, follow these steps:

[0027] 1) The airflow first enters the interior of the cabinet 1 through the air inlet pipe 2, then passes through the ventilation hole 307 to leave the square bucket 305, and passes through the rectangular hole 301, and then enters the interior of the laboratory after the dust is separated by the waterproof and breathable membrane 302;

[0028] 2) Then, the user can rotate the internal thread ring 308 to move downward inside the circular hole through the threaded connection drive screw 309, driving the support plate 310 to move downward, so that the conical block at the bottom of the sealing plug 311 enters the interior of the ventilation hole 307;

[0029] 3) Finally, when the conical block enters the ventilation hole 307, the distance between the inner diameter of the ventilation hole 307 and the outer surface of the conical block becomes the pore through which the current airflow passes. The higher the airflow velocity, the farther the conical block is from the ventilation hole 307. The more parts of the conical block enter the ventilation hole 307, the smaller the pores, and the lower the airflow velocity, until the sealing plug 311 enters the ventilation hole 307 and completely closes the ventilation hole, preventing the airflow from entering the laboratory.

[0030] In summary, the air guide structure of the laboratory fume hood, by setting a screw 309 and an internal threaded ring 308, uses a threaded connection to control the height of the support plate 310 inside the cabinet 1, so that the distance between the sealing plug 311 and the ventilation hole 307 is controlled by the user, so that the user can adjust the pore size between the inner wall of the ventilation hole 307 and the outer surface of the conical block according to the internal temperature of the laboratory and other requirements, thereby increasing the flow rate of the airflow entering the laboratory, thereby improving the convenience of using the laboratory fume hood. At the same time, the threaded connection between the screw 309 and the internal threaded ring 308 is used to limit the height of the support plate 310 and the sealing plug 311, thereby reducing the component structure, reducing the cost of use, and making it convenient for users to use.

[0031] Moreover, the waterproof breathable membrane 302, the ash guide plate 303 and the collection box 304 are used, so that the dust falling from the self-sealing hole 307 and the dust separated from the waterproof breathable membrane 302 can fall onto the ash guide plate 303 due to the influence of gravity and then slide into the interior of the collection box 304, thereby facilitating cleaning by the user. At the same time, in conjunction with the sealed door opened on the left side of the cabinet 1, under the premise of ensuring the stability of the air guide, it is convenient for the user to clean the collection box 304, the ash guide plate 303 and the waterproof breathable membrane 302 after opening the sealed door, thereby reducing the difficulty of cleaning, further facilitating the use of the user, and solving the problems in the comparative documents that the air flow speed inside the fume hood cannot be adjusted according to laboratory needs, and the structure is bloated and complicated, cleaning is difficult, and the cost of use is high.

[0032] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0033] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A laboratory fume hood air guide structure, comprising a cabinet body (1), characterized in that: An air inlet pipe (2) is fixedly installed on the top of the cabinet (1), and a limited flow cleaning component (3) is fixedly connected to the inner and outer sides of the cabinet (1); The flow limiting cleaning assembly (3) comprises a rectangular hole (301), a waterproof breathable membrane (302), an ash guide plate (303), a collection box (304), a square bucket (305), an air guide plate (306), a ventilation hole (307), an internal threaded ring (308), a screw (309), a support plate (310) and a sealing plug (311); a rectangular hole (301) is opened on the right side of the cabinet (1); a waterproof breathable membrane (302) is fixedly installed inside the rectangular hole (301); an ash guide plate (303) is fixedly installed on the inner right wall of the cabinet (1); and a left side of the ash guide plate (303) is fixedly installed. A collecting box (304) is installed, a square bucket (305) is fixedly installed inside the cabinet (1), an air guide plate (306) is fixedly installed inside the square bucket (305), and the air guide plate (306) is provided with no less than five ventilation holes (307), an internal thread ring (308) is movably connected to the top of the cabinet (1), a screw rod (309) is connected to the internal thread of the internal thread ring (308), a support plate (310) is rotatably connected to the bottom of the screw rod (309), and no less than five sealing plugs (311) are fixedly installed on the bottom of the support plate (310).

2. The air guide structure of a laboratory fume hood according to claim 1, characterized in that: The number of the sealing plugs (311) is the same as the number of the ventilation holes (307), and the sealing plugs (311) are located directly above the ventilation holes (307). The size of the sealing plugs (311) is matched with the size of the ventilation holes (307).

3. The air guide structure of a laboratory fume hood according to claim 1, characterized in that: A conical block is installed at the bottom of the sealing plug (311), a sealing door is hinged on the left side of the cabinet (1), and the square bucket (305) is located above the ash guide plate (303).

4. The air guide structure of a laboratory fume hood according to claim 1, characterized in that: An annular sliding block is installed at the bottom of the internal thread ring (308), an annular sliding groove is opened at the top of the cabinet (1), and the annular sliding block is slidably connected to the annular sliding groove.

5. The air guide structure of a laboratory fume hood according to claim 1, characterized in that: A circular hole is provided on the inner top wall of the cabinet (1), the screw rod (309) passes through the circular hole and extends into the interior of the cabinet (1), and the support plate (310) is located directly above the air guide plate (306).

6. The air guide structure of a laboratory fume hood according to claim 1, characterized in that: A sliding rod is installed on the top of the support plate (310), a sliding hole is opened on the inner top wall of the cabinet (1), and the sliding rod passes through the sliding hole and extends to the outside of the cabinet (1), and is slidably connected to the sliding hole.

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