Pipe-free ventilation cabinet capable of manually adjusting air speed

Abstract

The utility model discloses a pipe-free ventilation cabinet capable of manually adjusting wind speed, which comprises a cabinet body and a filtering mechanism, a port on one side of the cabinet body is provided with protective glass, the filtering mechanism comprises a mounting box body and a filtering box body, one side of the mounting box body is provided with a power socket, and the other side of the mounting box body is provided with a power socket. A functional panel, an adjusting knob, an alarm and a starting switch are arranged on the other side of the filter box body, a mounting groove is formed in the bottom of the filter box body, a first filter is fixedly nested in the mounting groove, a fan, a gas sensor and a supporting plate are arranged in the filter box body, and a second filter is arranged at the top of the supporting plate. The pipe-free ventilation cabinet capable of manually adjusting the air speed is advanced in design, compact in structure and convenient to use, the rotating speed of the draught fan can be manually adjusted at any time, then it can be ensured that when impurities in the filter are increased and resistance is increased, the surface air speed of air entering the cabinet body can still meet the requirement, harmful gas is effectively prevented from escaping, and the safety of experimenters is protected.

Description

Technical Field

[0001] The utility model belongs to the technical field of fume hoods, and in particular relates to a ductless fume hood with manually adjustable wind speed. Background Art

[0002] In order to prevent laboratory workers from inhaling or swallowing some toxic, pathogenic or unknown toxic chemicals and organisms, the laboratory should have good ventilation. Fume hoods are an indispensable part of laboratory ventilation design. Fume hoods are fully functional and tightly protected. They not only provide comprehensive protection for operators, but also withstand the corrosion of various chemical acids, alkalis and organic reagents, and do not contaminate the internal experimental samples. It ensures the smooth discharge of toxic, harmful and odorous gases, so that the experimental environment can achieve the safety effect specified by national standards. Traditional fume hoods use forced exhaust and ducts to discharge toxic gases outdoors, but the installation of ducts is large and will limit the location of the fume hood. In addition, the direct discharge of toxic and harmful gases without treatment will also pollute the environment. Therefore, ductless fume hoods that can treat exhaust gas and return the treated clean air to the room are widely used.

[0003] There are still some areas that need to be improved in the current ductless fume hoods. For example, the speed of the fan in the ductless fume hood remains constant to achieve a constant wind speed on the fume hood surface. However, as the filtering time increases, the impurities in the filter increase, and the resistance of air passing through the filter increases. At this time, due to the constant fan speed, the wind speed on the surface may not meet the requirements, which may cause the escape of harmful gases. Therefore, it is urgent to design a ductless fume hood with manually adjustable wind speed to solve the above problems. Utility Model Content

[0004] The utility model aims to provide a ductless fume hood with manually adjustable wind speed, so as to solve the problems existing in the above-mentioned background technology.

[0005] To achieve the above purpose, the utility model provides the following technical solution: a ductless fume hood with manually adjustable wind speed, comprising:

[0006] A cabinet body, wherein a through opening on one side of the cabinet body is provided with protective glass, wherein three pieces of the protective glass are provided from top to bottom, and two adjacent pieces of the protective glass are connected by hinges;

[0007] The filtering mechanism comprises an installation box body fixed on the top of the cabinet and a filter box body fixedly nested in the top opening of the installation box body, one side of the installation box body is provided with a power socket, and the other side is respectively provided with a function panel, an adjustment knob, an alarm and a start switch, the bottom of the filter box body is provided with a mounting groove, a first filter is fixedly nested in the mounting groove, the interior of the filter box body is respectively provided with a fan, a gas sensor and a support plate, and the top of the support plate is provided with a second filter.

[0008] Furthermore, the protective glass includes top protective glass, middle protective glass and bottom protective glass, the top protective glass is fixedly connected to the cabinet, the top protective glass is provided with a surface wind speed sensor, and the bottom protective glass is respectively provided with an operating port and a bayonet.

[0009] Furthermore, a hook matching the bayonet is fixed on one side of the installation box body.

[0010] Furthermore, a fan installation opening is provided at the center of the bottom plate of the filter box body, the fan is fixedly nested in the fan installation opening, and the support plate is a U-shaped structure, and the support plate is fixed directly above the fan installation opening.

[0011] Furthermore, a filter plate is fixedly connected to the top of the filter box body by bolts.

[0012] Furthermore, a wiring cavity is formed between the cabinet, the installation box and the filter box, and a power supply electrically connected to the power socket, a controller electrically connected to the adjustment knob, and cables for connecting various electrical appliances are arranged in the wiring cavity.

[0013] Furthermore, the first filter and the second filter have the same cross-section, and both are activated carbon filters.

[0014] The technical effects and advantages of the utility model are as follows: the ductless fume hood with manually adjustable wind speed has advanced design, compact structure and is easy to use. By setting an adjustment knob, the fan speed can be manually adjusted at any time, thereby ensuring that when the impurities in the filter increase and the resistance increases, the surface wind speed of the air entering the cabinet can still meet the requirements, effectively avoiding the escape of harmful gases and protecting the safety of the experimenters. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the utility model;

[0016] Figure 2 It is a schematic diagram of a part of the structure of the filter mechanism of the utility model when viewed from above;

[0017] Figure 3 It is a schematic diagram of a part of the structure of the filter mechanism of the utility model when viewed from above;

[0018] Figure 4 It is a vertical cross-sectional view of the utility model from the right side.

[0019] In the figure: 100, cabinet; 101, protective glass; 1011, top protective glass; 1012, middle protective glass; 1013, bottom protective glass; 102, hinge; 103, surface wind speed sensor; 104, operation port; 105, bayonet; 200, filter mechanism; 201, installation box; 2011, power socket; 2012, function panel; 2013, adjustment knob; 2014, alarm; 2015, start switch; 2016, hook; 202, filter box; 2021, installation slot; 2022, first filter; 2023, fan installation port; 2024, fan; 2025, gas sensor; 2026, support plate; 2027, second filter; 2028, filter plate; 203, wiring cavity. DETAILED DESCRIPTION

[0020] 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 of 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.

[0021] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0022] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] The utility model provides Figure 1-4A ductless fume hood with manually adjustable wind speed as shown in the figure comprises:

[0024] The cabinet 100 is a right-angled step structure. A protective glass 101 is provided in the opening on one side of the inclined surface of the cabinet 100. There are three pieces of protective glass 101 from top to bottom, and two adjacent pieces of protective glass 101 are connected by hinges 102, so that the protective glass 101 can be folded and flipped upward to open the cabinet door, which is convenient for placing large experimental materials in the cabinet 100. When the cabinet 100 is not in use, the cabinet door is opened to facilitate cleaning of the inner wall of the cabinet 100.

[0025] The filtering mechanism 200 includes an installation box body 201 fixed on the top of the cabinet 100 and a filtering box body 202 fixedly nested in the top opening of the installation box body 201. A power socket 2011 is provided on one side of the installation box body 201, and a function panel 2012, an adjustment knob 2013, an alarm 2014 and a start switch 2015 are provided on the other side. A mounting groove 2021 is provided at the bottom of the filtering box body 202, and a first filter 2022 is fixedly nested in the mounting groove 2021. A fan 2024, a gas sensor 2025 and a support plate 2026 are provided inside the filtering box body 202, and a second filter 2027 is provided on the top of the support plate 2026.

[0026] In addition, the protective glass 101 includes a top protective glass 1011, a middle protective glass 1012 and a bottom protective glass 1013. The top protective glass 1011 is fixedly connected to the cabinet 100. A surface wind speed sensor 103 is provided on the top protective glass 1011 to facilitate real-time monitoring of the surface wind speed when air enters the cabinet 100. An operating port 104 and a bayonet 105 are respectively provided on the bottom protective glass 1013 to facilitate inserting both hands into the cabinet 100 through the operating port 104 to perform experimental operations.

[0027] Specifically, a hook 2016 matching the bayonet 105 is fixed on one side of the mounting box body 201. When the cabinet door needs to be opened, the bottom protective glass 1013 is pulled upwards and the bayonet 105 is put on the hook 2016. The operation is simple and the structure is stable.

[0028] It is worth mentioning that a fan installation port 2023 is provided at the center of the bottom plate of the filter box body 202, and the fan 2024 is fixedly nested in the fan installation port 2023, so that the harmful gas in the cabinet 100 can be conveniently drawn upward through the fan 2024, so that the harmful gas passes through the first filter 2022 and the second filter 2027 in turn, and the support plate 2026 is a U-shaped structure. The support plate 2026 is fixed directly above the fan installation port 2023, and can support the second filter 2027 to prevent the second filter 2027 from fitting with the fan 2024, thereby ensuring that the air can flow smoothly.

[0029] Specifically, the top of the filter box body 202 is fixedly connected with a filter plate 2028 by bolts, which can ensure that the filtered air can be discharged from the filter box body 202 and prevent debris from falling into the filter box body 202.

[0030] It should be noted that a wiring cavity 203 is formed between the cabinet 100, the installation box body 201 and the filter box body 202. The wiring cavity 203 is provided with a power supply electrically connected to the power socket 2011, a controller electrically connected to the adjustment knob 2013, and cables for connecting various electrical appliances, so as to provide power support for various electrical appliances and facilitate the wiring of cables.

[0031] Specifically, the first filter 2022 and the second filter 2027 have the same cross-section and both use activated carbon filters to ensure that the harmful gas passing through the first filter 2022 can also pass through the second filter 2027, thereby achieving double filtration of the harmful gas in the cabinet 100 and achieving good filtering effect.

[0032] Working principle: When the ductless fume hood with manual wind speed adjustment is used, first turn on the start switch 2015, at which time the fan 2024 starts to run and draws the air in the cabinet 100 upwards, and then the experimenter's hands are inserted into the cabinet 100 through the operation port 104 to conduct the experiment. The harmful gas generated by the experiment mixes with the air and floats upward together, and enters the first filter 2022 and the second filter 2027 in turn. The gas sensor 2025 detects the air passing through the first filter 2022. When there are harmful gas components in the detection results, the first filter 2022 needs to be replaced in time. When the surface wind speed displayed on the function panel 2012 does not meet the requirements, the speed of the fan 2024 is increased by turning the adjustment knob 2013, so that the power of the air passing through the first filter 2022 and the second filter 2027 is increased, so that the surface wind speed of the external air when entering the cabinet 100 can always be within the safe range of 0.4 to 0.6 m / s. The ductless fume hood with manually adjustable wind speed has advanced design, compact structure and is easy to use. By setting the adjustment knob 2013, the rotation speed of the fan 2024 can be manually adjusted at any time, thereby ensuring that when the impurities in the filter increase and the resistance increases, the surface wind speed of the air entering the cabinet 100 can still meet the requirements, effectively avoiding the escape of harmful gases and protecting the safety of the experimenters.

[0033] Finally, it should be noted that the above is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. A ductless fume hood with manually adjustable wind speed, characterized in that: include: A cabinet (100), wherein a through opening on one side of the cabinet (100) is provided with a protective glass (101), wherein three pieces of the protective glass (101) are provided from top to bottom, and two adjacent pieces of the protective glass (101) are connected by a hinge (102); A filter mechanism (200), the filter mechanism (200) comprising an installation box (201) fixed on the top of a cabinet (100) and a filter box (202) fixedly nested in a top opening of the installation box (201); a power socket (2011) is provided on one side of the installation box (201), and a function panel (2012), an adjustment knob (2013), an alarm (2014) and a start switch (2015) are provided on the other side; a mounting groove (2021) is provided at the bottom of the filter box (202), a first filter (2022) is fixedly nested in the mounting groove (2021), a fan (2024), a gas sensor (2025) and a support plate (2026) are provided inside the filter box (202), and a second filter (2027) is provided on the top of the support plate (2026).

2. The ductless fume hood with manually adjustable wind speed according to claim 1, characterized in that: The protective glass (101) comprises a top protective glass (1011), a middle protective glass (1012) and a bottom protective glass (1013); the top protective glass (1011) is fixedly connected to the cabinet (100); a surface wind speed sensor (103) is provided on the top protective glass (1011); and an operating port (104) and a bayonet (105) are respectively provided on the bottom protective glass (1013).

3. The ductless fume hood with manually adjustable wind speed according to claim 2, characterized in that: A hook (2016) matching the bayonet (105) is fixed on one side of the installation box body (201).

4. The ductless fume hood with manually adjustable wind speed according to claim 1, characterized in that: A fan installation opening (2023) is provided at the center of the bottom plate of the filter box body (202), the fan (2024) is fixedly nested in the fan installation opening (2023), the support plate (2026) is a U-shaped structure, and the support plate (2026) is fixed directly above the fan installation opening (2023).

5. The ductless fume hood with manually adjustable wind speed according to claim 1, characterized in that: The top of the filter box body (202) is fixedly connected to a filter plate (2028) via bolts.

6. The ductless fume hood with manually adjustable wind speed according to claim 1, characterized in that: A wiring cavity (203) is formed between the cabinet (100), the installation box (201) and the filter box (202), and a power source electrically connected to the power socket (2011), a controller electrically connected to the adjustment knob (2013), and cables for connecting various electrical appliances are arranged in the wiring cavity (203).

7. The ductless fume hood with manually adjustable wind speed according to claim 1, characterized in that: The first filter (2022) and the second filter (2027) have the same cross-section and both are activated carbon filters.

Images