Self-cleaning ventilation cabinet for laboratory

Abstract

The utility model relates to a laboratory self-cleaning type ventilation cabinet which comprises a base, a cabinet body is fixedly installed on the top of the base, a gas collecting hood is arranged on the top of the cabinet body, the gas collecting hood penetrates through and extends into the cabinet body, a cleaning mechanism is arranged in the cabinet body, a gas supplementing mechanism is arranged in the base, and the cleaning mechanism is connected with the gas supplementing mechanism. The cleaning mechanism comprises a servo motor, the servo motor is fixedly installed on the right side of the cabinet body, an adjusting screw rod is fixedly installed at the output end of the servo motor, the adjusting screw rod penetrates through and extends into the cabinet body, and cross rods are fixedly installed at the front end of the left side of the inner wall of the cabinet body and the rear end of the left side of the inner wall of the cabinet body; and a linear bearing seat is mounted outside the cross rod in a sliding manner. According to the self-cleaning ventilation cabinet for the laboratory, through the arrangement of the cleaning mechanism and the contact assembly, the inner top wall and the rear side of the inner wall of the cabinet body are rapidly and conveniently cleaned, the trouble of manual cleaning is avoided, and the situation that water drops are condensed and drip to affect an experiment is also avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of laboratory fume hoods, in particular to a self-cleaning fume hood for laboratories. Background Art

[0002] The most important function of laboratory fume hoods is the exhaust function. In chemical laboratories, various harmful gases, odors, moisture, and flammable, explosive and corrosive substances are generated during experimental operations. In order to protect the safety of users and prevent the pollutants in the experiment from spreading to the laboratory, fume hoods should be used near the pollution source.

[0003] In Chinese patent publication number CN215391492U, a self-cleaning fume hood for a pharmaceutical clean laboratory is proposed. By arranging a ventilation pipe connected to an air pump at the top, the air in the operating chamber can be discharged well, thereby avoiding harm to the experimenter; the structure is simple and the ventilation performance is excellent.

[0004] The above invention is combined with the existing technology. In the process of realizing this application, the inventor found that there are at least the following problems in this technology. The existing fume hood is generally provided with an exhaust device on the top. However, during use, it is inevitable that the moisture inside the operating chamber evaporates and adheres to the inside of the operating chamber, making it difficult for the exhaust equipment to completely discharge the moisture. When the temperature drops, it is easy to condense into water droplets and drip, affecting the experimental operation. In particular, the top and the back side of the inner wall of the operating chamber are difficult to clean, so further improvement is needed. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides a self-cleaning fume hood for a laboratory, which has the advantages of convenient automatic cleaning, etc., and solves the problem of poor cleaning efficiency of the existing fume hoods.

[0006] To achieve the above object, the utility model provides the following technical solutions: a self-cleaning fume hood for a laboratory, comprising a base, a cabinet body is fixedly mounted on the top of the base, a gas collecting hood is arranged on the top of the cabinet body, the gas collecting hood penetrates and extends to the interior of the cabinet body, a cleaning mechanism is arranged inside the cabinet body, and an air replenishing mechanism is arranged inside the base;

[0007] The cleaning mechanism includes a servo motor, which is fixedly installed on the right side of the cabinet. An adjusting screw is fixedly installed on the output end of the servo motor, and the adjusting screw passes through and extends to the interior of the cabinet. A cross bar is fixedly installed on the front end of the left side of the inner wall of the cabinet and the rear end of the left side of the inner wall. A linear bearing seat is slidably installed on the outside of the cross bar, and an adjusting screw sleeve is installed on the external thread of the adjusting screw. A bearing frame is fixedly installed between the adjusting screw sleeve and the two linear bearing seats, and a contact assembly is arranged inside the bearing frame. The cross bar on the front side is located in front of the adjusting screw, and the cross bar on the rear side is located below the adjusting screw.

[0008] Furthermore, the contact component includes a movable roller, which is rotatably installed inside the bearing frame, and the movable roller is sleeved with an absorbent cotton cloth on the outside. The outside of the absorbent cotton cloth is fixedly installed with a Velcro hook surface, and the inside of the absorbent cotton cloth is fixedly installed with a Velcro fleece surface.

[0009] Furthermore, the air supply mechanism includes an air purifier, which is fixedly mounted on the inner bottom wall of the base, and the outlet of the air purifier is connected to a three-way pipe, which passes through and extends to the rear side of the base, and both outlets of the three-way pipe are connected to a transport pipe, which is connected to an air supply head having one end passing through and extending to the inside of the cabinet, and a wind shield located outside the air supply head is fixedly mounted on the rear side of the inner wall of the cabinet.

[0010] Furthermore, the top of the absorbent cotton cloth is in contact with the inner top wall of the cabinet, and the top of the absorbent cotton cloth is in contact with the rear side of the inner wall of the cabinet. The wind shield is a rectangular cover with a hollow interior and a missing bottom.

[0011] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0012] 1. This self-cleaning fume hood for laboratories can realize quick and convenient cleaning of the inner top wall and the back side of the inner wall of the cabinet through the setting of the cleaning mechanism and contact components, avoiding the trouble of manual cleaning and also preventing the condensation and dripping of water droplets from affecting the experiment.

[0013] 2. This self-cleaning fume hood is used in the laboratory. By setting up the air supply mechanism, it can avoid the laboratory being in a negative pressure state. At the same time, it can prevent the supplementary gas from blowing directly on the experimenters, thereby improving the comfort of using the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the utility model;

[0015] Figure 2 This is a schematic diagram of the cleaning mechanism structure of the utility model;

[0016] Figure 3 This is a schematic diagram of the contact assembly structure of the utility model;

[0017] Figure 4 It is a schematic diagram of the structure of the gas replenishing mechanism of the utility model.

[0018] In the figure: 1. base; 2. cabinet; 3. air collecting hood; 4. servo motor; 5. adjusting screw; 6. cross bar; 7. linear bearing seat; 8. load-bearing frame; 9. movable roller; 10. absorbent cotton cloth; 11. Velcro hook surface; 12. Velcro fleece surface; 13. three-way pipe; 14. transport pipe; 15. air supply head; 16. air purifier; 17. wind shield; 18. adjusting screw sleeve. DETAILED DESCRIPTION

[0019] 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.

[0020] See also Figure 1-4 In this embodiment, a self-cleaning fume hood for a laboratory includes a base 1, a cabinet body 2 is fixedly installed on the top of the base 1, a gas collecting hood 3 is arranged on the top of the cabinet body 2, the gas collecting hood 3 passes through and extends to the interior of the cabinet body 2, a cleaning mechanism is arranged inside the cabinet body 2, and an air replenishing mechanism is arranged inside the base 1.

[0021] Among them, the inner top wall of the cabinet 2 is embedded with a purification lamp, which can not only provide lighting but also sterilize and remove dust.

[0022] It should be noted that the gas collecting hood 3 is connected to the external exhaust device, so that harmful gases, odors, moisture, and flammable, explosive and corrosive substances in the cabinet 2 can be extracted and processed.

[0023] In this embodiment, the cleaning mechanism includes a servo motor 4, which is fixedly installed on the right side of the cabinet 2. An adjusting screw 5 is fixedly installed on the output end of the servo motor 4. The adjusting screw 5 passes through and extends into the interior of the cabinet 2. A cross bar 6 is fixedly installed on the front end of the left side of the inner wall of the cabinet 2 and the rear end of the left side of the inner wall. A linear bearing seat 7 is slidably installed on the outside of the cross bar 6. An adjusting screw sleeve 18 is installed on the external thread of the adjusting screw 5. A bearing frame 8 is fixedly installed between the adjusting screw sleeve 18 and the two linear bearing seats 7. A contact assembly is arranged inside the bearing frame 8. The front cross bar 6 is located in front of the adjusting screw 5, and the rear cross bar 6 is located below the adjusting screw 5.

[0024] Specifically, the servo motor 4 is started intermittently to rotate the adjusting screw 5. Since the adjusting screw sleeve 18 is connected to the linear bearing seat 7 via the supporting frame 8, the adjusting screw sleeve 18 can only move on the cross bar 6 via the linear bearing seat 7, so that the adjusting screw sleeve 18 and the supporting frame 8 can be moved to the left or right by the adjusting screw 5, thereby realizing the cleaning of the inner top wall of the cabinet 2 and the rear side of the inner wall of the cabinet 2 by the contact component.

[0025] In this embodiment, the contact component includes a movable roller 9, which is rotatably installed inside the supporting frame 8. An absorbent cotton cloth 10 is sleeved on the outside of the movable roller 9. A Velcro hook surface 11 is fixedly installed on the outside of the absorbent cotton cloth 10, and a Velcro fleece surface 12 is fixedly installed on the inside of the absorbent cotton cloth 10. The top of the upper absorbent cotton cloth 10 contacts the inner top wall of the cabinet 2, and the top of the lower absorbent cotton cloth 10 contacts the rear side of the inner wall of the cabinet 2.

[0026] The Velcro hook surface 11 is matched with the Velcro fleece surface 12 .

[0027] It should be noted that the water-absorbent cotton cloth 10 has a certain thickness and a certain deformation capability.

[0028] Specifically, after the absorbent cotton cloth 10 has been used for a period of time, the absorbent cotton cloth 10 rotates the movable roller 9 to expose the overlapping parts of the two ends of the absorbent cotton cloth 10 to the user, and then the Velcro hook surface 11 and the Velcro fleece surface 12 are separated, and the absorbent cotton cloth 10 is pulled outward to achieve convenient disassembly and replacement.

[0029] In this embodiment, the air supply mechanism includes an air purifier 16, which is fixedly installed on the inner bottom wall of the base 1. The outlet of the air purifier 16 is connected to a three-way pipe 13, which passes through and extends to the rear side of the base 1. The two outlets of the three-way pipe 13 are both connected to a transport pipe 14. The transport pipe 14 is connected to an air supply head 15 with one end passing through and extending to the interior of the cabinet 2. A wind shield 17 located outside the air supply head 15 is fixedly installed on the rear side of the inner wall of the cabinet 2. The wind shield 17 is a rectangular cover with a hollow interior and a missing bottom.

[0030] It should be noted that the thickness of the wind shield 17 is relatively thin. When in use, the wind directed out from the air supply head 15 can be redirected downward to avoid direct blowing of the supply air.

[0031] Specifically, the external fan is started to send supplementary air into the transport pipe 14 and the air supply head 15 through the air purifier 16, so as to replenish the air inside the laboratory and avoid a negative pressure state.

[0032] The working principle of the above embodiment is:

[0033] During use, the servo motor 4 is started intermittently to rotate the adjusting screw 5. Since the adjusting screw sleeve 18 is connected to the linear bearing seat 7 via the supporting frame 8, the adjusting screw sleeve 18 can only move on the cross bar 6 via the linear bearing seat 7, so that the adjusting screw sleeve 18 and the supporting frame 8 can be moved to the left or right by the adjusting screw sleeve 5, so that the absorbent cotton cloth 10 can adsorb and clean the water vapor on the top wall of the cabinet body 2 and the rear side of the inner wall of the cabinet body 2, thereby improving the overall service life of the fume hood and avoiding the influence of condensed water droplets on the experiment.

[0034] 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.

[0035] 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 self-cleaning fume hood for a laboratory, characterized in that: It comprises a base (1), a cabinet (2) is fixedly mounted on the top of the base (1), a gas collecting hood (3) is arranged on the top of the cabinet (2), the gas collecting hood (3) penetrates and extends into the interior of the cabinet (2), a cleaning mechanism is arranged inside the cabinet (2), and a gas replenishing mechanism is arranged inside the base (1); The cleaning mechanism comprises a servo motor (4), the servo motor (4) being fixedly mounted on the right side of the cabinet (2), an adjusting screw (5) being fixedly mounted on the output end of the servo motor (4), the adjusting screw (5) penetrating and extending into the interior of the cabinet (2), a cross bar (6) being fixedly mounted on the front end of the left side of the inner wall of the cabinet (2) and the rear end of the left side of the inner wall, a linear bearing seat (7) being slidably mounted on the outside of the cross bar (6), an adjusting screw sleeve (18) being threadedly mounted on the outside of the adjusting screw (5), a bearing frame (8) being fixedly mounted between the adjusting screw sleeve (18) and the two linear bearing seats (7), a contact assembly being arranged inside the bearing frame (8), the cross bar (6) being located on the front side of the adjusting screw (5), and the cross bar (6) being located below the adjusting screw (5) on the rear side.

2. A self-cleaning fume hood for a laboratory according to claim 1, characterized in that: The contact assembly comprises a movable roller (9), the movable roller (9) being rotatably mounted inside the bearing frame (8), the movable roller (9) being sleeved with a water-absorbent cotton cloth (10) on the outside, a Velcro hook surface (11) being fixedly mounted on the outside of the water-absorbent cotton cloth (10), and a Velcro fleece surface (12) being fixedly mounted on the inside of the water-absorbent cotton cloth (10).

3. A self-cleaning fume hood for a laboratory according to claim 2, characterized in that: The air supply mechanism comprises an air purifier (16), the air purifier (16) being fixedly mounted on the inner bottom wall of the base (1), the outlet of the air purifier (16) being connected to a three-way pipe (13), the three-way pipe (13) penetrating and extending to the rear side of the base (1), the two outlets of the three-way pipe (13) being connected to a transport pipe (14), the transport pipe (14) being connected to an air supply head (15) having one end penetrating and extending to the interior of the cabinet (2), and a wind shield (17) located outside the air supply head (15) being fixedly mounted on the rear side of the inner wall of the cabinet (2).

4. A self-cleaning fume hood for a laboratory according to claim 3, characterized in that: The top of the absorbent cotton cloth (10) is in contact with the inner top wall of the cabinet (2), and the top of the absorbent cotton cloth (10) is in contact with the rear side of the inner wall of the cabinet (2). The wind shield (17) is a rectangular cover with a hollow interior and a missing bottom.

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