Biological safety cabinet

Abstract

The utility model discloses a biological safety cabinet which comprises a cabinet body, and an operation box, an air supply box used for supplying air into the operation box and an air exhaust box used for exhausting air out of the cabinet body are arranged in the cabinet body. An operation opening is formed in one side of the operation box, window moving glass is movably arranged on the operation opening, a driving device for driving the window moving glass to move is connected to the operation opening, and a pedal for controlling the driving device to operate is arranged at the bottom of the cabinet body. The utility model has the beneficial effects that: 1, the electric window moving glass is arranged and is controlled by the pedal to move up and down, so that experiment pollution caused by frequently moving hands out of the operation box during operation is prevented; 2, a standby socket is arranged in the operation box, so that an external cable is not needed;

Description

Technical Field

[0001] The utility model belongs to the technical field of biological safety cabinets, and in particular relates to a biological safety cabinet. Background Art

[0002] The biological safety cabinet is a safety equipment widely used in teaching, higher education, clinical experiments and manufacturing in industries such as microbiology, biomedicine, animal testing, and biological products. It is also the first barrier and a basic safety defense device for studying biosafety. It has a front window operation port, through which the operator can operate in the safety cabinet to protect personnel, products and the environment during the operation. The biological safety cabinet effectively reduces the chance of laboratory-acquired infection and the chance of cross-contamination between people and samples or between samples. It is used to protect operators, laboratory environment, and biological safety of experimental materials. However, when adjusting the height of the sliding window in a traditional biological safety cabinet, the operator needs to extend his hand out of the operating box and manually adjust the height of the sliding window, which increases the chance of cross-infection between people and samples and has an adverse effect on the experiment. To solve the above problems, we propose a biological safety cabinet. Utility Model Content

[0003] The utility model aims to provide a biological safety cabinet.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] A biological safety cabinet comprises a cabinet body, characterized in that: an operation box, an air supply box for supplying air into the operation box, and an exhaust box for exhausting air outside the cabinet body are arranged in the cabinet body; an operation port is arranged on one side of the operation box, a sliding window glass is movably arranged on the operation port, and a driving device for driving the sliding window glass to move is connected, and a pedal for controlling the operation of the driving device is arranged at the bottom of the cabinet body; a ventilation port is arranged on the bottom side wall of the operation box, a first return air channel is formed between the operation box and the cabinet body, and is connected to the ventilation port; a second return air channel is formed between the air supply box and the exhaust box, and is connected to the first return air channel; a control panel is also arranged in the cabinet body, and is electrically connected to the driving device and the pedal.

[0006] Preferably, a slide rail is respectively arranged on both sides of the cabinet, the sliding window glass is suspended on the slide rail through a slider, the driving device includes a motor, and a screw connected to the output end of the motor through a gear, the screw includes a smooth rod portion at both ends and a threaded portion in the middle, the screw is arranged in the slide rail, the screw is threadedly connected to the slider through the threaded portion, and the smooth rod portions at both ends of the screw are rotatably connected to the two ends of the slide rail through bearings.

[0007] Preferably, the pedal includes a first pedal for driving the sliding window glass to move upward and a second pedal for driving the sliding window glass to move downward, the first pedal and the second pedal respectively include a base, a pressing plate hinged to one end of the base, and a spring arranged between the base and the pressing plate, the bottom surface of the pressing plate is provided with contacts corresponding to the surface of the base, and is electrically connected to the control panel.

[0008] Preferably, the air supply box includes an air supply fan and an air supply filter, and the air supply filter is installed at the air outlet of the air supply box; the exhaust box includes an exhaust fan and an exhaust filter, and the exhaust filter is installed at the air outlet of the exhaust box.

[0009] Preferably, a wind speed sensor is also provided in the operation box, and the control panel is electrically connected to the wind speed sensor, the air supply fan, and the exhaust fan respectively.

[0010] Preferably, an illumination lamp is provided on the inner side of the cabinet near the operation port, and a bracket is provided on the bottom of the cabinet.

[0011] Preferably, an ultraviolet lamp and a socket are arranged on one side of the inner wall of the operation box, and a sewage outlet is also opened at the bottom of the operation box, and a sewage valve is installed on the sewage outlet.

[0012] The beneficial effects of the utility model are: 1. It is equipped with an electric window glass, and the up and down movement is controlled by a pedal, so that the hands do not need to be frequently moved out of the operation box during operation, causing experimental contamination; 2. A spare socket is provided in the operation box, and no external cables are required. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of a biological safety cabinet of the utility model;

[0014] Figure 2 It is a side cross-sectional schematic diagram of a biological safety cabinet of the utility model;

[0015] Figure 3 It is a partial structural schematic diagram of a biological safety cabinet of the utility model;

[0016] Figure 4 This utility model Figure 3 Schematic diagram of the structure at A in FIG.

[0017] Figure 5 This is an electrical schematic diagram of a biological safety cabinet of the utility model;

[0018] Among them: cabinet 10, operation box 12, air supply box 14, exhaust box 16, operation port 18, sliding window glass 20, pedal 22, vent 24, first return air duct 26, second return air duct 28, slide rail 30, slider 32, motor 34, screw 36, first pedal 38, second pedal 40, base 42, pressing plate 44, spring 46, contact 48, air supply fan 50, air supply filter 52, exhaust fan 54, exhaust filter 56, wind speed sensor 58, bracket 60, ultraviolet lamp 62, socket 64, drain valve 66. DETAILED DESCRIPTION

[0019] The technical solution of this patent is further described in detail below in conjunction with specific implementation methods.

[0020] like Figures 1 to 4 As shown, a biological safety cabinet of the utility model comprises a cabinet body 10, in which an operation box 12, an air supply box 14 for supplying air into the operation box 12, and an exhaust box 16 for exhausting air to the outside of the cabinet body 10 are arranged; the air supply box 14 and the exhaust box 16 respectively have an air inlet and an air outlet, the air outlet of the air supply box 14 is connected with the operation box 12, and the air outlet of the exhaust box 16 is connected with the outside; an operation port 18 is provided on one side of the operation box 12, and a sliding window glass 20 is movably arranged on the operation port 18. When the sliding window glass 20 is moved up to open the operation port 18, the operation port 18 also serves as an air inlet, and is connected to a driving device for moving the sliding window glass 20. The cabinet 10 is provided with a driving device for driving, and a pedal 22 for controlling the operation of the driving device is provided at the bottom of the cabinet 10; a vent 24 is provided on the bottom side wall of the operation box 12, and a first return air channel 26 is formed between the operation box 12 and the cabinet 10, and is connected to the vent 24; a second return air channel 28 is formed between the air supply box 14 and the exhaust box 16, and the second return air channel 28 is connected to the air inlet of the air supply box 14 and the exhaust box 16, and is connected to the first return air channel 26; a control panel is also provided in the cabinet 10, and is electrically connected to the driving device and the pedal 22. When the pedal 22 is pressed, the control panel receives an electrical signal and outputs it to the driving device, driving the sliding window glass 20 to move. When working, 70% of the air volume of the system flows vertically to the working area through the air supply filter 52, and 30% of the air volume is discharged from the cabinet 10 through the exhaust filter 56. The air volume lost by the system is sucked in through the return air channel of the operation port 18, thereby creating an air barrier to provide protection for the operator, the experimental sample and the operating environment.

[0021] Furthermore, a slide rail 30 is provided on both sides of the cabinet 10, and the sliding window glass 20 is suspended on the slide rail 30 through a slider 32. The driving device includes a motor 34, a screw rod 36 connected to the output end of the motor 34 through a gear, and the screw rod 36 includes a smooth rod portion at both ends and a threaded portion in the middle. The screw rod 36 is arranged in the slide rail 30, and the screw rod 36 is threadedly connected to the slider 32 through the threaded portion. The smooth rod portions at both ends of the screw rod 36 are rotatably connected to both ends of the slide rail 30 through bearings. When working, the motor 34 drives the screw rod 36 to rotate, and drives the slider 32 on the screw rod 36 to move up and down.

[0022] The pedal 22 includes a first pedal 38 for driving the window glass 20 to move upward and a second pedal 40 for driving the window glass 20 to move downward. The first pedal 38 and the second pedal 40 respectively include a base 42, a pressing plate 44 hinged to one end of the base 42, and a spring 46 arranged between the base 42 and the pressing plate 44. The bottom surface of the pressing plate 44 is provided with contacts 48 corresponding to the surface of the base 42, and is electrically connected to the control board. During operation, the first pedal 38 is pressed, and the control board receives an upward signal, and controls the motor 34 to rotate forward to drive the window glass 20 upward; the second pedal 40 is pressed, and the control board receives a downward signal, and controls the motor 34 to rotate reversely to drive the window glass 20 downward. The forward and reverse rotation of the motor 34 is achieved by changing the direction of the current, which is a common method for changing the forward and reverse rotation of the motor 34, so it will not be repeated here.

[0023] The air supply box 14 includes an air supply fan 50 and an air supply filter 52 , and the air supply filter 52 is installed at the air outlet of the air supply box 14 ; the exhaust box 16 includes an exhaust fan 54 and an exhaust filter 56 , and the exhaust filter 56 is installed at the air outlet of the exhaust box 16 .

[0024] Furthermore, a wind speed sensor 58 is also provided in the operating box 12, and the control board is electrically connected to the wind speed sensor 58, the blower 50, and the exhaust fan 54. The wind speed data is collected by the wind speed sensor 58 and fed back to the control board, and the control board adjusts the speed of the blower 50 and the exhaust fan 54 according to the air volume.

[0025] An illuminating lamp is disposed on the inner side of the cabinet 10 near the operation port 18 , and a bracket 60 is disposed at the bottom of the cabinet 10 .

[0026] An ultraviolet lamp 62 and a socket 64 are arranged on one side of the inner wall of the operation box 12. A sewage outlet is also provided at the bottom of the operation box 12, and a sewage valve 66 is installed on the sewage outlet.

[0027] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0028] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A biological safety cabinet, comprising a cabinet body, characterized in that: An operation box, an air supply box for supplying air into the operation box, and an exhaust box for exhausting air outside the cabinet are arranged in the cabinet; an operation port is arranged on one side of the operation box, a sliding window glass is arranged on the operation port so as to be movable up and down, and a driving device for driving the sliding window glass to move is connected, and a pedal for controlling the operation of the driving device is arranged at the bottom of the cabinet; a ventilation port is arranged on the bottom side wall of the operation box, a first return air channel is formed between the operation box and the cabinet, and is connected to the ventilation port; a second return air channel is formed between the air supply box and the exhaust box, and is connected to the first return air channel; a control panel is also arranged in the cabinet, and is electrically connected to the driving device and the pedal.

2. A biological safety cabinet according to claim 1, characterized in that: A slide rail is respectively arranged on both sides of the cabinet, and the sliding window glass is suspended on the slide rail through a slider. The driving device includes a motor and a screw connected to the output end of the motor through a gear. The screw includes a smooth rod portion at both ends and a threaded portion in the middle. The screw is arranged in the slide rail, and the screw is threadedly connected to the slider through the threaded portion. The smooth rod portions at both ends of the screw are rotatably connected to the two ends of the slide rail through bearings.

3. A biological safety cabinet according to claim 1, characterized in that: The pedal includes a first pedal for driving the sliding window glass to move upward and a second pedal for driving the sliding window glass to move downward. The first pedal and the second pedal respectively include a base, a pressing plate hinged to one end of the base, and a spring arranged between the base and the pressing plate. The bottom surface of the pressing plate is provided with contacts corresponding to the surface of the base, and is electrically connected to the control panel.

4. A biological safety cabinet according to claim 1, characterized in that: The air supply box includes an air supply fan and an air supply filter, and the air supply filter is installed at the air outlet of the air supply box; the exhaust box includes an exhaust fan and an exhaust filter, and the exhaust filter is installed at the air outlet of the exhaust box.

5. A biological safety cabinet according to claim 4, characterized in that: A wind speed sensor is also arranged in the operation box, and the control panel is electrically connected to the wind speed sensor, the air supply fan and the exhaust fan respectively.

6. A biological safety cabinet according to claim 1, characterized in that: An illuminating lamp is arranged on the inner side of the cabinet near the operation port, and a bracket is arranged on the bottom of the cabinet.

7. A biological safety cabinet according to claim 1, characterized in that: An ultraviolet lamp and a socket are arranged on one side of the inner wall of the operation box, and a sewage outlet is also arranged at the bottom of the operation box, and a sewage valve is installed on the sewage outlet.

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