Air inlet device of biological safety cabinet

Abstract

The utility model relates to the technical field of biosafety cabinets, in particular to an air inlet device of a biosafety cabinet. Comprising an operation cabinet, a mounting cabinet and an airflow treatment assembly, the operation cabinet is used for providing an operation space of the biosafety cabinet, and an airflow inlet is formed in the operation cabinet; the installation cabinet is located above the operation cabinet, air outlet holes are formed in the installation cabinet, and three independent airflow channels are formed in the installation cabinet and communicated with the operation cabinet. The airflow processing assembly is installed at the air outlet hole and the three airflow channels and used for enabling airflow in the operation cabinet to circularly flow and be discharged between the installation cabinet and the operation cabinet according to the proportion of 7: 3. The air inlet device of the biological safety cabinet not only can solve the problems that airflow in the cabinet body flows unevenly and is exhausted unstably, but also is simple in structure and easy to disassemble, assemble and maintain.

Description

Technical Field

[0001] The utility model relates to the technical field of biological safety cabinets, in particular to an air inlet device for a biological safety cabinet. Background Art

[0002] A biological safety cabinet is a box-shaped, air-purifying, negative-pressure safety device that prevents the release of aerosols containing hazardous or unknown biological particles during laboratory operations. It is widely used in research, teaching, clinical testing, and production in fields such as microbiology, biomedicine, genetic engineering, and biological products. It is the most fundamental safety device within the primary barrier of laboratory biosafety.

[0003] Currently, biosafety cabinets rely on two fans at the top of the cabinet and a separate air duct for airflow filtration and internal circulation. The fans are typically installed on either side of the cabinet's top. However, due to the different functions of the two fans, the airflow inside the cabinet becomes asymmetrical during exhaust and internal circulation, resulting in uneven circulation and unstable exhaust. Furthermore, the separate air duct occupies cabinet space, making it difficult to install the fans and components, making routine maintenance and inspection difficult. Therefore, a solution is urgently needed.

[0004] The above content is only used to assist in understanding the technical solution of the present invention and does not mean that the above content is the closest prior art. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide an air inlet device for a biological safety cabinet, which can not only solve the problems of uneven air flow inside the cabinet and unstable air discharge, but also has a simple structure and is easy to disassemble and maintain.

[0006] To achieve the above-mentioned purpose, the technical solution of the present invention is implemented as follows: a biosafety cabinet air inlet device includes: an operating cabinet, an installation cabinet and an air flow processing component; the operating cabinet is used to provide an operating space for the biosafety cabinet, and the operating cabinet is provided with an air flow inlet; the installation cabinet is located above the operating cabinet, and the installation cabinet is provided with an air outlet, and the installation cabinet is provided with three independent air flow channels connected to the operating cabinet; the air flow processing component is installed at the air outlet and the three air flow channels, and is used to circulate and discharge the air flow in the operating cabinet between the installation cabinet and the operating cabinet in a ratio of 7:3.

[0007] Preferably, a partition is provided between the operation cabinet and the installation cabinet; the three independent air flow channels include an air inlet, a first air supply hole and a second air supply hole; the air inlet, the first air supply hole and the second air supply hole are all arranged on the partition, and the air inlet is located in the middle of the partition, and the first air supply hole and the second air supply hole are respectively located on both sides of the air inlet; the air outlet is located at the top of the installation cabinet and is located on the same vertical line as the air inlet.

[0008] Preferably, the airflow processing component includes an exhaust filter unit, a first air supply unit and a second air supply unit; the exhaust filter unit is installed at the bottom of the air outlet, and is used to introduce the airflow in the operating cabinet into the installation cabinet along the air inlet, and discharge the airflow along the air outlet after filtering; the first air supply unit is installed at the top of the first air supply hole; the second air supply unit is installed at the top of the second air supply hole, and the first air supply unit and the second air supply unit are used to discharge the airflow of the installation cabinet into the installation cabinet along the first air supply hole and the second air supply hole.

[0009] Preferably, the exhaust filter unit includes an induced draft fan, an air filter adsorption sponge and a mounting cover; the mounting cover is detachably connected to the top plate of the mounting cabinet; the air filter adsorption sponge and the induced draft fan are both installed in the mounting cover, and the induced draft fan is connected to the air outlet; the air filter adsorption sponge is located between the induced draft fan and the air outlet, and is detachably connected to the mounting cover.

[0010] Preferably, the first air supply part includes a first mounting seat, a first air supply fan and a first filter cover; the first mounting seat is mounted on the top of the first air supply part and is detachably connected to the partition; the first air supply fan is mounted in the first mounting seat and is connected to the first air supply part; the first filter cover is provided with a first air filter, and the first filter cover is covered on the first air supply fan and is detachably connected to the first mounting seat.

[0011] Preferably, the second air supply part includes a second mounting seat, a second air supply fan and a second filter cover; the second mounting seat is mounted on the top of the second air supply part and is detachably connected to the partition; the second air supply fan is mounted in the second mounting seat and is connected to the second air supply part; an air filter is provided on the second filter cover, and the second filter cover is covered on the second air supply fan and is detachably connected to the second mounting seat.

[0012] Preferably, the power of the induced draft fan is greater than the power of the first supply fan and the second supply fan, and the power of the induced draft fan, the first supply fan and the second supply fan are all adjustable.

[0013] Preferably, the air flow inlet on the operating cabinet includes a first air intake mesh cover and a second air intake mesh cover; an operating base plate is provided at the bottom end of the operating cabinet; the first air intake mesh cover and the second air intake mesh cover are both installed on the operating base plate, and the first air intake mesh cover is located at the end of the operating base plate facing the operator, and the top outer side of the first air intake mesh cover is snap-fitted with the cabinet door of the operating cabinet; the second air intake mesh cover is arranged at the connection between the operating base plate and the back plate of the operating cabinet, and a vent is provided on the back plate of the operating cabinet to communicate with the second air intake mesh cover.

[0014] The beneficial effects of the present invention are as follows:

[0015] (1) The biosafety cabinet provided by the present invention has symmetrically distributed airflow channels and separate exhaust and supply air sections, which not only realizes uniform circulation of air between the operating cabinet and the installation cabinet, but also the airflow ratio of exhaust and supply air can be adjusted and controlled, thereby improving the use effect. In addition, the internal structure of the installation cabinet is reasonably divided, and maintenance space is reserved, which is convenient for daily maintenance and use.

[0016] (2) The two air inlets provided on the operating cabinet of the present invention are both located on the front and rear sides of the operating base plate. They are not only at the same height, but also symmetrically distributed in the air inlet direction, thereby ensuring that the airflow entering the installation cabinet is more balanced and improving the stability of the operation of the airflow processing components inside the biosafety cabinet. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural diagram of the utility model;

[0018] Figure 2 This is a top view of the partition of the utility model;

[0019] Figure 3 It is a left view of the present utility model.

[0020] Description of reference numerals:

[0021] 10. Operation cabinet; 20. Installation cabinet; 21. Exhaust filter unit; 22. First air supply unit;

[0022] 23. Second air supply unit; 24. Air outlet; 30. Partition; 31. Air inlet;

[0023] 32. First air supply hole; 33. Second air supply hole; 40. Operation base plate; 41. First air inlet grille;

[0024] 42. Second air intake grille. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. In the absence of conflict, the embodiments in this application and the features in the embodiments can be combined with each other. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0026] Example

[0027] See also Figure 1-3 As shown:

[0028] The utility model provides an air inlet device for a biosafety cabinet, comprising an operating cabinet 10, an installation cabinet 20 and an airflow processing component.

[0029] The operation cabinet 10 is used to provide an operating space for the biosafety cabinet, and the operation cabinet 10 is provided with an air flow inlet. The air flow inlet on the operation cabinet 10 mainly includes a first air inlet mesh cover 41 and a second air inlet mesh cover 42. The bottom end of the operation cabinet 10 is provided with an operation base plate 40, and the first air inlet mesh cover 41 and the second air inlet mesh cover 42 are both installed on the operation base plate 40, and the first air inlet mesh cover 41 is located at the end of the operation base plate 40 facing the operator, and the top outer side of the first air inlet mesh cover 41 is connected to the lower edge of the cabinet door of the operation cabinet 10, so that when the reactants inside the operation cabinet 10 are at rest, the air flow can still enter along the first air inlet mesh cover 41. The second air inlet mesh cover 42 is arranged at the connection between the operation base plate 40 and the back plate of the operation cabinet 10, and a vent is provided on the back plate of the operation cabinet 10 to communicate with the second air inlet mesh cover 42.

[0030] In specific applications, the first air intake grille 41 and the second air intake grille 42 are opposite to each other, not only at the same height, but also symmetrically distributed in the air intake direction, and the air intake sizes are also the same, thereby ensuring that the airflow entering the installation cabinet 20 is more balanced.

[0031] The installation cabinet 20 is located above the operating cabinet 10 and is provided with an air outlet 24. The installation cabinet 20 is also provided with three independent air flow channels communicating with the operating cabinet 10. A partition 30 is provided between the operating cabinet 10 and the installation cabinet 20.

[0032] The three independent airflow channels include an air inlet 31, a first air supply 32, and a second air supply 33. These are all located on the partition 30, with the air inlet 31 located in the middle of the partition 30 and the first and second air supply 32 and 33 symmetrically positioned on either side of the air inlet 31. The air outlet 24 is located at the top of the cabinet 20 and is aligned vertically with the air inlet 31.

[0033] The airflow processing assembly mainly includes an exhaust filter unit 21, a first air supply unit 22, and a second air supply unit 23. The exhaust filter unit 21 is installed at the bottom of the air outlet 24 and is used to guide the airflow from the operating cabinet 10 into the installation cabinet 20 through the air inlet 31, and then discharge the filtered air through the air outlet 24.

[0034] The exhaust filter unit 21 includes an induced draft fan, an air filter adsorption sponge, and a mounting cover. The mounting cover is detachably connected to the top plate of the installation cabinet 20. The air filter adsorption sponge and induced draft fan are both installed in the mounting cover, and the induced draft fan is connected to the air outlet 24. The air filter adsorption sponge is located between the induced draft fan and the air outlet 24 and is detachably connected to the mounting cover.

[0035] In specific applications, the induced draft fan transports 30% of the air introduced into the installation cabinet 20 to the air filter adsorption sponge for filtration and then discharges the air through the air outlet 24 .

[0036] The first air supply unit 22 is mounted on top of the first air supply hole 32. The first air supply unit 22 includes a first mounting base, a first blower, and a first filter cover. The first mounting base is mounted on top of the first air supply unit 22 and is removably connected to the partition 30. The first blower is mounted in the first mounting base and communicates with the first air supply unit 22. The first filter cover is equipped with a first air filter, which is mounted on the first blower and removably connected to the first mounting base.

[0037] The second air supply unit 23 is mounted on top of the second air supply hole 33. The second air supply unit 23 includes a second mounting base, a second blower, and a second filter cover. The second mounting base is mounted on top of the second air supply unit 23 and is detachably connected to the partition 30. The second blower is mounted in the second mounting base and communicates with the second air supply unit 23. The second filter cover is also provided with an air filter, which is mounted on the second blower and detachably connected to the second mounting base.

[0038] In specific applications, the first air supply part 22 and the second air supply part 23 are used to discharge the air flow of the installation cabinet 20 into the installation cabinet 20 along the first air supply hole 32 and the second air supply hole 33. Since the first air supply hole 32 and the second air supply hole 33 are symmetrically distributed with the air induced hole 31, a circulating air flow with the air induced hole 31 as the center is formed between the air induced hole 31, the first air supply hole 32 and the second air supply hole 33, and the circulating air flow is symmetrically distributed, which is more balanced in the entire operating cabinet 10.

[0039] In specific applications, the power of the induced draft fan is greater than that of the first and second supply fans, and the power of the induced draft fan, the first and second supply fans are all adjustable. Because the entire airflow processing assembly is installed at the air outlet 24 and the three airflow channels, the ratio of airflow exhaust and circulation throughout the operation cabinet 10 can be controlled according to the operational requirements of the biosafety cabinet. Generally, 70% of the airflow in the operation cabinet 10 is circulated between the installation cabinet 20 and the operation cabinet 10, and 30% of the airflow in the operation cabinet 10 is filtered and discharged.

[0040] The internal structure of the installation cabinet 20 is rationally divided, and maintenance space is reserved. The exhaust filter unit 21, the first air supply unit 22 and the second air supply unit 23 are all detachably connected to the installation cabinet 20, which is convenient for maintenance and replacement of parts, thereby facilitating daily maintenance and use.

[0041] It should be noted that if the embodiments of the present invention involve directional indications such as up, down, left, right, front, back, etc., then such directional indications are only used to explain the relative positional relationship and movement of the various components in a specific posture as shown in the accompanying drawings. If the specific posture changes, the directional indications will also change accordingly. In addition, if the embodiments of the present invention involve descriptions such as "first" and "second", then such descriptions such as "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features specified as "first" and "second" can explicitly or implicitly include at least one of such features. In addition, the meaning of "and / or" appearing throughout the text includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions where both A and B are satisfied. In addition, "multiple" refers to more than two. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist.

[0042] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A biosafety cabinet air inlet device, characterized in that: The invention comprises: an operation cabinet (10), an installation cabinet (20) and an air flow processing component; the operation cabinet (10) is used to provide an operation space of a biosafety cabinet, and an air flow inlet is provided on the operation cabinet (10); the installation cabinet (20) is located above the operation cabinet (10), and an air outlet (24) is provided on the installation cabinet (20), and three independent air flow channels are provided on the installation cabinet (20) and communicated with the operation cabinet (10); the air flow processing component is installed at the air outlet (24) and the three air flow channels, and is used to circulate and discharge the air flow in the operation cabinet (10) between the installation cabinet (20) and the operation cabinet (10) in a ratio of 7:

3.

2. The air inlet device of a biological safety cabinet according to claim 1, characterized in that: A partition (30) is provided between the operating cabinet (10) and the installation cabinet (20); the three independent air flow channels include an air inlet (31), a first air supply hole (32) and a second air supply hole (33); the air inlet (31), the first air supply hole (32) and the second air supply hole (33) are all provided on the partition (30), and the air inlet (31) is located in the middle of the partition (30), and the first air supply hole (32) and the second air supply hole (33) are respectively located on both sides of the air inlet (31); the air outlet (24) is located at the top of the installation cabinet (20) and is located on the same vertical line as the air inlet (31).

3. The air inlet device of a biological safety cabinet according to claim 2, characterized in that: The airflow processing component comprises an exhaust filter unit (21), a first air supply unit (22) and a second air supply unit (23); the exhaust filter unit (21) is installed at the bottom of the air outlet (24) and is used to introduce the airflow in the operation cabinet (10) into the installation cabinet (20) along the air induction hole (31), and to discharge the airflow along the air outlet (24) after filtering; the first air supply unit (22) is installed at the top of the first air supply hole (32); the second air supply unit (23) is installed at the top of the second air supply hole (33), and the first air supply unit (22) and the second air supply unit (23) are used to discharge the airflow of the installation cabinet (20) into the installation cabinet (20) along the first air supply hole (32) and the second air supply hole (33).

4. The air inlet device of a biological safety cabinet according to claim 3, characterized in that: The exhaust filter unit (21) includes an induced draft fan, an air filter adsorption sponge, and a mounting cover; the mounting cover is detachably connected to the top plate of the mounting cabinet (20); the air filter adsorption sponge and the induced draft fan are both installed in the mounting cover, and the induced draft fan is connected to the air outlet (24); the air filter adsorption sponge is located between the induced draft fan and the air outlet (24), and is detachably connected to the mounting cover.

5. The air inlet device of a biological safety cabinet according to claim 4, characterized in that: The first air supply portion (22) includes a first mounting seat, a first air supply fan and a first filter cover; the first mounting seat is mounted on the top of the first air supply portion (22) and is detachably connected to the partition (30); the first air supply fan is mounted in the first mounting seat and is connected to the first air supply portion (22); a first air filter is provided on the first filter cover, and the first filter cover is covered on the first air supply fan and is detachably connected to the first mounting seat.

6. The air inlet device of a biological safety cabinet according to claim 5, characterized in that: The second air supply portion (23) includes a second mounting seat, a second air supply fan and a second filter cover; the second mounting seat is mounted on the top of the second air supply portion (23) and is detachably connected to the partition (30); the second air supply fan is mounted in the second mounting seat and is in communication with the second air supply portion (23); an air filter is provided on the second filter cover, and the second filter cover is covered on the second air supply fan and is detachably connected to the second mounting seat.

7. The air inlet device of a biological safety cabinet according to claim 6, characterized in that: The power of the induced draft fan is greater than the power of the first blower and the second blower, and the power of the induced draft fan, the first blower and the second blower are all adjustable.

8. The air inlet device of a biological safety cabinet according to claim 7, characterized in that: The air inlet on the operating cabinet (10) comprises a first air inlet mesh cover (41) and a second air inlet mesh cover (42); an operating base plate (40) is provided at the bottom end of the operating cabinet (10); the first air inlet mesh cover (41) and the second air inlet mesh cover (42) are both mounted on the operating base plate (40), and the first air inlet mesh cover (41) is located at the end of the operating base plate (40) facing the operator, and the top outer side of the first air inlet mesh cover (41) is snap-connected with the cabinet door of the operating cabinet (10); the second air inlet mesh cover (42) is arranged at the connection between the operating base plate (40) and the back plate of the operating cabinet (10), and a vent is provided on the back plate of the operating cabinet (10) to communicate with the second air inlet mesh cover (42).

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