Constant-temperature and constant-humidity biological safety cabinet

Abstract

The utility model relates to the technical field of biological safety cabinets, and discloses a constant-temperature and constant-humidity biological safety cabinet which comprises a cabinet body and a cabinet door, a temperature and humidity control box is fixedly installed at the top in a cavity of the cabinet body, and the temperature and humidity control box can control the temperature and the humidity in the cabinet body; a tray assembly; the circulation structure comprises an adsorption box, an air guide pipe, a fan and spacing bodies, the adsorption box is fixedly connected with the cabinet body, the adsorption box is provided with a cavity, the two spacing bodies are fixedly connected in the cavity of the adsorption box, the fan is fixedly connected with the adsorption box and located between the two spacing bodies, and air is exhausted into the air guide pipe through the fan; air outside the adsorption box is sucked into the two sides of the spacing bodies and then enters the space between the two spacing bodies from the upper portions of the spacing bodies, the air is exhausted by the draught fan, and the air entering the air guide pipe is obliquely and upwards exhausted from the exhaust grooves, so that the air in the cabinet body flows, air convection of the upper layer and the lower layer is promoted, and it is guaranteed that the temperature and humidity of the air in the upper layer and the humidity of the air in the lower layer tend to be consistent.

Description

Technical Field

[0001] The utility model relates to the technical field of biological safety cabinets, in particular to a constant temperature and humidity biological safety cabinet. Background Technique

[0002] Biological safety cabinets can be divided into first-level, second-level, and third-level. When operating liquids or semi-fluids in the laboratory, such as shaking, pouring, stirring, or dropping a liquid onto the surface of a solid or into another liquid, aerosols may be generated. Therefore, it is necessary to carry out the operation in a relatively sealed environment.

[0003] The prior art discloses a biological safety cabinet (Publication No.: CN221016103U), which includes a cabinet body, a glass door, a counterweight, and a suspension mechanism: the cabinet body is provided with an opening, and the glass door is slidably arranged on the opening in the vertical direction; the glass door is provided with a rack extending in the vertical direction; the counterweight is slidably arranged on the cabinet body in the vertical direction; the suspension mechanism is fixed to the cabinet body, and the suspension mechanism includes a gear set, a screw rod, and a sliding sleeve. The rack, the gear set, and the screw rod are sequentially meshed and connected, and the sliding sleeve is threadedly connected to the screw rod; the sliding sleeve is connected to the counterweight, and the sliding sleeve is used to drive the counterweight to move during the movement of the glass door.

[0004] In the prior art, there are deficiencies in the control of the temperature and humidity inside the cabinet body, and the control of variables during the experimental research process is insufficient, which will affect the experimental data and accuracy. Therefore, it is necessary to control the temperature and humidity inside the cabinet body. The prior art also uses temperature and humidity control methods to control the internal environment of the cabinet body. However, there is room for optimization in the air fluidity inside the cabinet body and the collection of water flows formed by the aggregation of water droplets.

[0005] For this reason, we propose a constant temperature and humidity biological safety cabinet. Content of the Utility Model

[0006] The utility model mainly solves the technical problems of poor temperature and humidity control inside the cabinet body and poor air circulation fluidity, and provides a constant temperature and humidity biological safety cabinet.

[0007] In order to achieve the above object, the utility model adopts the following technical scheme. A constant temperature and humidity biological safety cabinet includes:

[0008] A cabinet body and a cabinet door, the cabinet door is hinged to the cabinet body and together form a sealed box structure. A temperature and humidity control box is fixedly installed at the top of the cavity of the cabinet body, and the temperature and humidity control box can control the temperature and humidity inside the cabinet body;

[0009] A tray assembly for holding experimental equipment, the tray assembly includes a tray and a bearing plate, the tray is fixedly connected to the cabinet body, and the bearing plate is inserted into the tray;

[0010] A circulation structure is arranged in the cabinet cavity for the flow of air. The circulation structure includes an adsorption box, a duct, a fan, and a spacer. The adsorption box is fixedly connected to the cabinet body. The adsorption box has a cavity. Two spacers are fixedly connected inside the cavity of the adsorption box. The fan is fixedly connected to the adsorption box and is located between the two spacers. The duct forms a flat tube structure. The duct is fixedly connected to the adsorption box and is connected to the exhaust port of the fan.

[0011] As a preferred embodiment of the present invention, the adsorption box forms a box structure with an open top. A sealing cover is provided on the top of the adsorption box. The sealing cover is locked with the adsorption box by bolts. Two guiding plates are provided on the top of the sealing cover. Rectangular slots are provided on both the sealing plate and the supporting plate for the flow of air. The guiding plates can guide the air into the cavity of the adsorption box.

[0012] As a preferred embodiment of the present invention, the spacer forms a rectangular plate structure. The spacer is fixedly connected to the inner bottom surface of the adsorption box. The length of the spacer is equal to the width inside the cavity of the adsorption box. The height of the spacer is lower than the height inside the cavity of the adsorption box.

[0013] As a preferred embodiment of the present invention, a gap is left between the air inlet of the fan and the inner bottom surface of the adsorption box. The upper end of the fan extends above the adsorption box. A round hole is provided at the bottom of the fan. The upper end of the fan extends into the round hole.

[0014] As a preferred embodiment of the present invention, the duct forms a flat tube with an L-shaped cross-section. A plurality of exhaust slots for exhausting air are provided on the front wall surface of the duct. The exhaust slots are inclined upward.

[0015] As a preferred embodiment of the present invention, the guiding plates extend to the bottom of the supporting plate. The two guiding plates are distributed in an inward V shape. The guiding plates are fixedly connected to the top of the sealing cover. The rectangular slots are located on one side of the spacer.

[0016] As a preferred embodiment of the present invention, an integrally formed rib is provided on the top of the supporting plate. A slot adapted to the rib is provided at the bottom of the bearing plate. The bearing plate is inserted into the rib.

[0017] The present invention provides a biosafety cabinet with constant temperature and humidity. It has the following beneficial effects:

[0018] 1. For this biosafety cabinet with constant temperature and humidity, the fan discharges air into the duct. Then, the air outside the adsorption box is inhaled from both sides of the spacer and enters between the two spacers from above the spacer. The air is discharged by the fan. The air entering the duct is discharged obliquely upward from each exhaust slot, making the air in the cabinet flow, promoting the convection of upper and lower layer air, and ensuring that the temperature and humidity of the upper and lower layer air tend to be consistent.

[0019] 2. The constant temperature and humidity biological safety cabinet, by setting a sealing cover and a guiding plate, allows air to enter from the rectangular groove under the pallet. The air is guided through the funnel structure formed by the two guiding plates, so that the air is sucked into the adsorption box from the rectangular groove at the top of the sealing cover, realizing air intake. During the air intake process, the water droplets dripping on the top of the pallet can be collected into the adsorption box. Along with the air flow, the humidity of the air entering the adsorption box can be increased, reducing the overflow phenomenon caused by the water mist gathering and dripping on the inner bottom surface of the cabinet body, and reducing the probability of water accumulation at the bottom of the cabinet body due to the water droplet collection.

[0020] 3. The constant temperature and humidity biological safety cabinet, by setting a detachable bearing plate, can fix multiple sets of experimental equipment on the bearing plate. Using the apparatus containing the experimental sample pieces, and then aligning the slots of the bearing plate with the convex ribs, the connection between the bearing plate and the pallet is realized, facilitating the centralized picking and placing of the equipment and improving the convenience of sample placement. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is the overall three-dimensional view of the present utility model;

[0022] Figure 2 is the schematic diagram of the cabinet door opening of the present utility model;

[0023] Figure 3 is the schematic diagram of the internal structure of the cabinet body of the present utility model;

[0024] Figure 4 is the three-dimensional view of the tray assembly and the circulation structure of the present utility model;

[0025] Figure 5 is the three-dimensional view of the circulation structure of the present utility model.

[0026] Legend: 10, cabinet body; 11, cabinet door; 12, temperature and humidity control box; 13, pallet; 14, bearing plate; 20, adsorption box; 21, air duct; 22, fan; 23, spacer; 24, exhaust slot; 25, guiding plate. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] A constant temperature and humidity biological safety cabinet, as Figure 1 and Figure 2 shown, includes:

[0028] Cabinet body 10 and cabinet door 11, the cabinet door 11 is hinged to the cabinet body 10 and together form a sealed box structure. A temperature and humidity control box 12 is fixedly installed at the top inside the cabinet body 10. The temperature and humidity control box 12 can control the temperature and humidity inside the cabinet body 10. In this solution, the temperature and humidity control box 12 includes a housing. Inside the housing, a fan, a semiconductor refrigeration sheet, a thermocouple and a steam generator are installed. A controller is installed on the front wall of the cabinet door 11. The controller needs to be powered on. The fan, the refrigeration sheet, the thermocouple and the steam generator are all electrically connected to the controller. Of course, a temperature and humidity sensor is also installed inside the cabinet body 10. The temperature and humidity sensor is electrically connected to the control. By selectively starting the refrigeration sheet or the thermocouple through the controller, cold air or hot air is sent into the cavity of the cabinet body 10 by the fan. At the same time, the water mist generated by the steam generator falls with the flowing air to ensure that the temperature and humidity inside the cabinet body 10 are in a stable state. This is the existing well-known technology and will not be elaborated here;

[0029] A tray assembly for holding experimental equipment. The tray assembly includes a tray 13 and a bearing plate 14. The tray 13 is fixedly connected to the cabinet body 10. The bearing plate 14 is inserted into the tray 13. The top of the tray 13 is provided with integrally formed convex ribs. The bottom of the bearing plate 14 is provided with slots adapted to the convex ribs. The bearing plate 14 is inserted into the convex ribs. By providing the detachable bearing plate 14, multiple groups of experimental equipment can be fixed on the bearing plate 14. Using the utensils containing experimental samples, and then aligning the slots of the bearing plate 14 with the convex ribs to achieve the insertion of the bearing plate 14 into the tray 13, which is convenient for centralized picking and placing of equipment and improves the convenience of sample placement.

[0030] Such as Figure 2 、 Figure 3 、 Figure 4 And Figure 5As shown in the figure, a circulation structure is provided in the cavity of the cabinet body 10 for the flow of air. The circulation structure includes an adsorption box 20, a duct 21, a fan 22 and a spacer 23. The adsorption box 20 is fixedly connected to the cabinet body 10. The adsorption box 20 has a cavity. Two spacers 23 are fixedly connected in the cavity of the adsorption box 20. The fan 22 is fixedly connected to the adsorption box 20 and is located between the two spacers 23. The duct 21 forms a flat tube structure. The duct 21 is fixedly connected to the adsorption box 20 and the duct 21 is connected to the exhaust port of the fan 22. The spacer 23 forms a rectangular plate structure. The spacer 23 is fixedly connected to the inner bottom surface of the adsorption box 20. The length of the spacer 23 is equal to the width of the cavity of the adsorption box 20. The height of the spacer 23 is lower than the height of the cavity of the adsorption box 20. There is a gap between the air inlet of the fan 22 and the inner bottom surface of the adsorption box 20. The upper end of the fan 22 extends above the adsorption box 20. A round hole is opened at the bottom of the fan 22. The upper end of the fan 22 extends into the round hole. The duct 21 forms a flat tube with an L-shaped cross-section. A plurality of exhaust slots 24 for exhausting air are opened on the front wall surface of the duct 21. The exhaust slots 24 are inclined upward. In this solution, the fan 22 is a duct fan. The air is discharged into the duct 21 through the fan 22. Then, the air outside the adsorption box 20 is sucked into both sides of the spacer 23 and enters between the two spacers 23 from above the spacer 23. The air is discharged by the fan 22. The air entering the duct 21 is discharged obliquely upward from each exhaust slot 24, so that the air in the cabinet body 10 flows, promoting the convection of the upper and lower layer air and ensuring that the temperature and humidity of the upper and lower layer air tend to be consistent.

[0031] As Figure 4 and Figure 5 shown in the figure, the adsorption box 20 forms a box structure with an open top. A sealing cover is provided at the top of the adsorption box 20. The sealing cover is locked to the adsorption box 20 by bolts. Two guiding plates 25 are provided at the top of the sealing cover. Rectangular grooves are opened on both the sealing plate and the supporting plate 13 for the flow of air. The guiding plates 25 can guide the air into the cavity of the adsorption box 20. The guiding plates 25 extend to the bottom of the supporting plate 13. The two guiding plates 25 are distributed in an inner-inclined shape. The guiding plates 25 are fixedly connected to the top of the sealing cover. The rectangular grooves are located on one side of the spacer 23. As a supplement to the above solution, by providing the sealing cover and the guiding plates 25, the air enters below the supporting plate 13 from the rectangular grooves, and the air is guided through the funnel structure formed by the two guiding plates 25, so that the air is sucked into the adsorption box 20 from the rectangular grooves at the top of the sealing cover, realizing air intake. During the air intake process, the water droplets dripping on the top of the supporting plate 13 can be collected into the adsorption box 20. Along with the air flow, the humidity of the air entering the adsorption box 20 can be increased, reducing the overflow phenomenon caused by the water mist gathering and dripping on the inner bottom surface of the cabinet body 10, and reducing the probability of water accumulation at the bottom of the cabinet body 10 due to the water droplet collection.

[0032] Working principle of the present utility model: The temperature and humidity control box 12 includes a housing. A fan, a thermoelectric cooler, a thermocouple and a steam generator are installed in the cavity of the housing. A controller is installed on the front wall of the cabinet door 11. The controller needs to be powered on. The fan, the cooler, the thermocouple and the steam generator are all electrically connected to the controller. Of course, a temperature and humidity sensor is also installed in the cavity of the cabinet body 10, and the temperature and humidity sensor is electrically connected to the controller. The cooler or the thermocouple is selectively started by the controller, and cold air or hot air is sent into the cavity of the cabinet body 10 through the fan. At the same time, the water mist generated by the steam generator falls with the flowing air, ensuring that the temperature and humidity in the cabinet body 10 are in a stable state;

[0033] The fan 22 discharges air into the air duct 21. Then, the air outside the adsorption box 20 is adsorbed and inhaled from both sides of the spacer 23 and then enters between the two spacers 23 from above the spacer 23. The air is discharged by the fan 22. The air entering the air duct 21 is discharged obliquely upward from each exhaust slot 24, so that the air in the cabinet body 10 flows. The air enters from the rectangular slot under the tray 13 and is guided by the funnel structure formed by the two guide plates 25, so that the air is inhaled into the adsorption box 20 from the rectangular slot at the top of the sealing cover, realizing air intake. During the air intake process, the water droplets dripping on the top of the tray 13 can be collected into the adsorption box 20, realizing the circular flow of air and the collection of water droplets.

[0034] The above shows and describes the basic principles, main features and advantages of the present utility model. Those skilled in the art should understand that the present utility model is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principle of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the present utility model claimed. The scope of protection claimed by the present utility model is defined by the appended claims and their equivalents.

Claims

1. A constant temperature and humidity biological safety cabinet, characterized in that: include: A cabinet body (10) and a cabinet door (11), wherein the cabinet door (11) and the cabinet body (10) are hingedly connected and together form a sealed cabinet structure, and a temperature and humidity control box (12) is fixedly installed on the top of the cabinet body (10), and the temperature and humidity control box (12) can control the temperature and humidity in the cabinet body (10); A tray assembly is used for lifting experimental equipment, the tray assembly comprising a support plate (13) and a bearing plate (14), the support plate (13) is fixedly connected to the cabinet (10), and the bearing plate (14) is plugged into the support plate (13); A circulation structure is arranged in a cabinet (10) cavity for air flow, the circulation structure comprising an adsorption box (20), an air duct (21), a fan (22) and a spacer (23); the adsorption box (20) is fixedly connected to the cabinet (10); the adsorption box (20) has a cavity; two spacers (23) are fixedly connected in the cavity of the adsorption box (20); the fan (22) is fixedly connected to the adsorption box (20) and is located between the two spacers (23); the air duct (21) forms a flat tube structure; the air duct (21) is fixedly connected to the adsorption box (20) and the air duct (21) is connected to the exhaust port of the fan (22).

2. The constant temperature and humidity biological safety cabinet according to claim 1, characterized in that: The adsorption box (20) forms a box structure with an open top, a sealing cover is provided on the top of the adsorption box (20), and the sealing cover is locked with the adsorption box (20) by bolts, and two guide plates (25) are provided on the top of the sealing cover, and the sealing plates and the support plate (13) are both provided with rectangular grooves for air flow, and the guide plates (25) can guide air into the cavity of the adsorption box (20).

3. The constant temperature and humidity biological safety cabinet according to claim 1, characterized in that: The spacer (23) forms a rectangular plate structure, the spacer (23) is fixedly connected to the inner bottom surface of the adsorption box (20), the length of the spacer (23) is equal to the width of the adsorption box (20) cavity, and the height of the spacer (23) is lower than the height of the adsorption box (20) cavity.

4. The constant temperature and humidity biological safety cabinet according to claim 1, characterized in that: A gap is left between the air inlet of the fan (22) and the inner bottom surface of the adsorption box (20), the upper end of the fan (22) extends to above the adsorption box (20), a circular hole is opened at the bottom of the fan (22), and the upper end of the fan (22) extends to the inside of the circular hole.

5. The constant temperature and humidity biological safety cabinet according to claim 1, characterized in that: The air guide pipe (21) is formed into a flat pipe with an L-shaped cross section. The front wall surface of the air guide pipe (21) is provided with a plurality of exhaust slots (24) for exhausting air. The exhaust slots (24) are inclined upward.

6. The constant temperature and humidity biological safety cabinet according to claim 2, characterized in that: The guide plate (25) extends to the bottom of the support plate (13), the two guide plates (25) are arranged in an inward-facing "X" shape, the guide plates (25) are fixedly connected to the top of the sealing cover, and the rectangular groove is located on one side of the spacer (23).

7. The constant temperature and humidity biological safety cabinet according to claim 1, characterized in that: The top of the support plate (13) is provided with an integrally formed convex rib, the bottom of the bearing plate (14) is provided with a slot adapted to the convex rib, and the bearing plate (14) is plugged into the convex rib.

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