Ventilation cabinet filter convenient to replace

Abstract

The ventilation cabinet filter convenient to replace comprises a normally-used ventilation cabinet main body, an air inlet pipe is fixedly installed at the upper end of the ventilation cabinet main body in a penetrating mode, an air outlet pipe is fixedly installed on the right side of the ventilation cabinet main body in a penetrating mode, and a transversely-arranged installation plate is fixedly installed at the lower end of the right side of the ventilation cabinet main body. A bearing plate of a circular structure is arranged above the mounting plate, and a filter shell of a cylindrical structure is arranged above the bearing plate. According to the fume hood filter convenient to replace, the novel structural design is adopted, the four filter shells are arranged above the bearing plate, when replacement is needed, only the bearing plate needs to be pressed downwards and rotated, then the bearing plate is reset upwards under the elastic pushing effect of the first spring, the next filter shell is in butt joint with an air outlet pipe, and replacement is convenient. Therefore, quick butt joint is achieved, time in the process is very short, and work of the ventilation cabinet can not be stopped.

Description

Technical Field

[0001] The utility model relates to the technical field of fume hood filters, in particular to a fume hood filter which is easy to replace. Background Art

[0002] Fume hoods are generally divided into two types: suction fume hoods and push fume hoods. Suction fume hoods create a negative pressure environment inside the hood to draw in harmful gases and expel them to the outside environment. Push fume hoods create a positive pressure environment inside the hood to expel harmful substances out of the hood. Fume hoods are usually equipped with various filters and fans to ensure safe operation of experiments. Using fume hoods can effectively reduce the risk of experimental operators being exposed to harmful substances.

[0003] In the prior art, a Chinese patent with the authorization announcement number CN105311911B discloses a filter device for an experimental fume hood, wherein an air inlet is provided at one end of the filter box, an exhaust port is provided at the other end of the filter box, and an acid absorption device, an alkali absorption device, an activated carbon adsorption device, an ultraviolet sterilization device, a spray device, a gas drying device and a gas detection device are sequentially provided between the air inlet and the exhaust port. The present invention can control the exhaust gas well within a safe range by providing multiple gas filtering devices, and can filter the gas uniformly and thoroughly one by one by providing multiple sealing plates. At the same time, a detection device is provided, and the concentration of the acid and alkali absorption solution can be automatically feedback-adjusted according to the data of the detection device, so that the gas meets the requirements of safety and environmental protection. At the same time, a spray device is provided, and the gas can be further processed effectively.

[0004] The filter box of the above-mentioned device filters and purifies the gas inside the fume hood, but in actual use, the filter components inside the filter box (such as filter screen and activated carbon, etc.) need to be replaced regularly. The filter box in the above-mentioned device is located above the cabinet, which is inconvenient to replace, and the cabinet needs to stop working during replacement. Utility Model Content

[0005] The utility model aims to provide a fume hood filter which is easy to replace, so as to solve the problem of inconvenience in replacing the filter device proposed in the above background technology.

[0006] To achieve the above purpose, the utility model provides the following technical solutions: a fume hood filter that is easy to replace, comprising a fume hood body in normal use, an air inlet pipe is fixedly installed through the upper end of the fume hood body, and an air outlet pipe is fixedly installed through the right side of the fume hood body, and also includes:

[0007] A transversely arranged mounting plate is fixedly installed at the lower right end of the fume hood body, and a bearing plate with a circular structure is arranged above the mounting plate, and a filter housing with a cylindrical structure is arranged above the bearing plate, and a hole structure for docking with the air outlet pipe is opened on the upper surface of the filter housing, and a rotating replacement mechanism for easy replacement is arranged between the bearing plate and the mounting plate;

[0008] A filter screen and an adsorption filler arranged up and down are fixedly installed inside the filter housing, and the adsorption filler is set to be an activated carbon material. A heating mechanism for heating to desorb the activated carbon is fixedly installed on the upper surface of the carrier plate.

[0009] Preferably, the rotation replacement mechanism includes a connecting column coaxially fixedly mounted on the lower surface of the bearing plate, and a through-type sliding structure is formed between the connecting column and the mounting plate.

[0010] Preferably, a first spring for pushing the bearing plate to return upward is arranged outside the connecting column, and four first springs are arranged symmetrically about the center of the bearing plate on the filter housing.

[0011] Preferably, a sealing plate for sealing the upper hole is rotatably mounted on the inner upper end of the filter housing, and a second spring is fixedly mounted between the sealing plate and the inner wall of the filter housing.

[0012] Preferably, the heating mechanism comprises a positioner fixedly mounted above the carrier plate and an electric heating device fixedly mounted at the bottom end of the positioner.

[0013] Preferably, the positioner is configured as a columnar groove structure that forms a snap-fit ​​disassembly and installation structure with the filter housing, and the electric heating device enters the interior of the filter housing through a through groove opened at the bottom of the filter housing.

[0014] Preferably, the electric heating device is electrically connected to the powered contacts on the upper surface of the supporting plate through internal wires, and the positions of the powered contacts correspond to the positions of the filter housing, and a power supply device for contacting the powered contacts and supplying power is fixedly installed on the upper left surface of the mounting plate.

[0015] Compared with the prior art, the utility model has the following beneficial effects: the fume hood filter that is easy to replace adopts a new structural design, and its specific contents are as follows:

[0016] 1. The gas in the fume hood enters the filter housing through the air outlet pipe. The filter screen and adsorption filler inside the filter housing are used to filter and adsorb harmful substances in the gas (such as inhalable particulate matter and toxic fumes, etc.), thereby ensuring the safety of gas emissions;

[0017] Furthermore, there are four filter housings arranged above the carrier plate. When replacement is required, it is only necessary to press down and rotate the carrier plate, and then reset the carrier plate upward under the elastic push of the first spring, so that the next filter housing is docked with the air outlet pipe, thereby realizing quick docking. The time of this process is very short, so the operation of the fume hood can be kept unchanged.

[0018] Furthermore, a sealing plate is arranged inside the filter housing, and when docked with the air outlet pipe, the sealing plate is pushed to rotate to automatically open the seal, and when disconnected, the sealing plate is reset under the squeezing action of the second spring to automatically seal the filter housing.

[0019] 2. A heating mechanism is provided. When the corresponding energized contacts are in contact with the power supply device, the power supply device can be used to supply power to the electric heating device, so that the electric heating device heats the inside of the filter housing, so that the adsorbed filler inside reaches a certain temperature and desorbs, thereby extending the service life of the entire filter. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0021] Figure 2 This is a schematic diagram of the structure of the load-bearing plate of the utility model;

[0022] Figure 3 This is a schematic diagram of the connection relationship between the mounting plate and the load-bearing plate of the utility model;

[0023] Figure 4 This is a schematic diagram of the cross-sectional structure of the filter of the utility model;

[0024] Figure 5 For this utility model Figure 4 A in the middle is an enlarged schematic diagram of the structure;

[0025] Figure 6 This is a schematic diagram of the position relationship between the filter and the positioner of the utility model;

[0026] Figure 7 It is a structural schematic diagram of the utility model in a state where the carrying plate is pressed downward.

[0027] In the figure: 1. Fume hood body; 2. Air inlet duct; 3. Air outlet duct; 4. Mounting plate; 5. Load-bearing plate; 6. Filter housing; 7. Filter screen; 8. Adsorption filler; 9. Connecting column; 10. First spring; 11. Sealing plate; 12. Second spring; 13. Positioner; 14. Electric heating device; 15. Power-on contact; 16. Power supply device; 17. Through slot. DETAILED DESCRIPTION

[0028] 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.

[0029] Example 1: Please refer to Figure 1 and Figure 4 In order to achieve the purpose of filtering the exhaust gas in the fume hood, the present embodiment provides the following technical solutions, which specifically disclose: a fume hood body 1 in normal use, an air inlet pipe 2 is fixedly installed through the upper end of the fume hood body 1, and an air outlet pipe 3 is fixedly installed through the right side of the fume hood body 1, a transversely arranged mounting plate 4 is fixedly installed at the lower right end of the fume hood body 1, and a supporting plate 5 with a circular structure is arranged above the mounting plate 4, and a filter housing 6 with a cylindrical structure is arranged above the supporting plate 5, and a hole structure for docking with the air outlet pipe 3 is opened on the upper surface of the filter housing 6, and a filter screen 7 and an adsorption filler 8 arranged up and down are fixedly installed inside the filter housing 6, and the adsorption filler 8 is set to an activated carbon material.

[0030] When using the device, firstly, air is introduced into the interior of the fume hood main body 1 through the air inlet pipe 2, so that a positive pressure is formed inside the fume hood main body 1. Under the action of pressure, the internal air is discharged from the air outlet pipe 3 into the filter housing 6. At this time, the filter mesh 7 and the adsorption filler 8 (activated carbon) in the filter housing 6 are used to filter and adsorb the gas, thereby removing harmful substances.

[0031] Example 2: Please refer to Figure 2-Figure 5 In order to solve the problem that traditional devices are inconvenient to filter the filter device, this embodiment provides the following technical solutions, which utilizes a rotating replacement mechanism to simplify the overall replacement steps, and specifically discloses: a rotating replacement mechanism that is convenient for replacement is arranged between the supporting plate 5 and the mounting plate 4, and the rotating replacement mechanism includes a connecting column 9 coaxially fixedly installed on the lower surface of the supporting plate 5, and a through-type sliding structure is formed between the connecting column 9 and the mounting plate 4, a first spring 10 for pushing the supporting plate 5 to reset upward is arranged on the outside of the connecting column 9, and the filter housing 6 is symmetrically arranged with four of them about the center of the supporting plate 5, a sealing plate 11 for sealing the upper hole is rotatably installed on the upper end of the filter housing 6, and a second spring 12 is fixedly installed between the sealing plate 11 and the inner wall of the filter housing 6.

[0032] When the filter needs to be replaced after using it for a period of time, first press the supporting plate 5 downwards (at this time, the filter housing 6 and the air outlet pipe 3 are disconnected). At this time, the connecting column 9 under the supporting plate 5 slides downward relative to the mounting plate 4, and then the supporting plate 5 is rotated ninety degrees and switched to the next filter housing 6. After releasing the supporting plate 5, it resets upwards under the elastic push of the first spring 10, so that the air outlet pipe 3 and the switched filter housing 6 are docked, and the internal sealing plate 11 of the replaced filter housing 6 automatically seals the top hole under the push of the second spring 12.

[0033] Example 3: Please refer to Figure 6 and Figure 7 In order to solve the problem of frequent replacement of filter materials in filters of traditional devices, this embodiment provides the following technical solutions, which utilize a heating mechanism to heat activated carbon so that the activated carbon is desorbed and the service life is extended. Specifically, the following technical solutions are disclosed: a heating mechanism for heating and desorbing activated carbon is fixedly installed on the upper surface of the carrier plate 5, the heating mechanism includes a positioner 13 fixedly installed above the carrier plate 5 and an electric heating device 14 fixedly installed at the bottom of the positioner 13, the positioner 13 is configured as a columnar groove structure that forms a snap-fitting detachable installation structure with the filter housing 6, and the electric heating device 14 enters the interior of the filter housing 6 through a through groove 17 opened at the bottom of the filter housing 6, the electric heating device 14 is electrically connected to an energized contact 15 located on the upper surface of the carrier plate 5 through an internal wire, and the position of the energized contact 15 corresponds to the position of the filter housing 6, and a power supply device 16 for contacting the energized contact 15 and supplying power is fixedly installed on the upper left surface of the mounting plate 4.

[0034] The filter housing 6 that has just been replaced rotates to the left side, and the corresponding power contact 15 synchronously rotates to a position in contact with the power supply device 16. The power supply device 16 is turned on to supply power to the electric heating device 14 through the power contact 15, so that the electric heating device 14 heats the inside of the filter housing 6. At this time, the internal adsorption filler 8 heats up, causing the activated carbon material to desorb, thereby extending its service life.

[0035] In the description of the present invention, unless otherwise specified, "multiple" means two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does 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 limiting the present invention. In addition, the terms "first", "second", "third" and the like are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0036] 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 fume hood filter that is easy to replace, comprising a fume hood body (1) in normal use, an air inlet pipe (2) fixedly installed through the upper end of the fume hood body (1), and an air outlet pipe (3) fixedly installed through the right side of the fume hood body (1), characterized in that: Also includes: A transversely arranged mounting plate (4) is fixedly mounted on the lower right end of the fume hood body (1), and a bearing plate (5) with a circular structure is arranged above the mounting plate (4), and a filter housing (6) with a cylindrical structure is arranged above the bearing plate (5), and a hole structure for docking with the air outlet pipe (3) is provided on the upper surface of the filter housing (6), and a rotating replacement mechanism for convenient replacement is arranged between the bearing plate (5) and the mounting plate (4); A filter screen (7) and an adsorption filler (8) arranged vertically are fixedly installed inside the filter housing (6), and the adsorption filler (8) is configured to be made of activated carbon. A heating mechanism for heating and desorbing the activated carbon is fixedly installed on the upper surface of the carrier plate (5).

2. The easily replaceable fume hood filter according to claim 1, characterized in that: The rotation replacement mechanism comprises a connecting column (9) coaxially fixedly mounted on the lower surface of the bearing plate (5), and a through-type sliding structure is formed between the connecting column (9) and the mounting plate (4).

3. The easily replaceable fume hood filter according to claim 2, characterized in that: The outside of the connecting column (9) is provided with a first spring (10) for pushing the supporting plate (5) to return upward, and a total of four filter housings (6) are provided symmetrically about the center of the supporting plate (5).

4. The easily replaceable fume hood filter according to claim 3, characterized in that: A sealing plate (11) for sealing the upper hole is rotatably mounted on the inner upper end of the filter housing (6), and a second spring (12) is fixedly mounted between the sealing plate (11) and the inner wall of the filter housing (6).

5. The easily replaceable fume hood filter according to claim 1, characterized in that: The heating mechanism comprises a positioner (13) fixedly mounted above the carrier plate (5) and an electric heating device (14) fixedly mounted at the bottom end of the positioner (13).

6. The easily replaceable fume hood filter according to claim 5, characterized in that: The positioner (13) is configured as a columnar groove structure that forms a snap-fitting disassembly and installation structure with the filter housing (6), and the electric heating device (14) enters the interior of the filter housing (6) through a through groove (17) provided at the bottom of the filter housing (6).

7. The easily replaceable fume hood filter according to claim 6, characterized in that: The electric heating device (14) is electrically connected to an energized contact (15) located on the upper surface of the carrier plate (5) via an internal wire, and the position of the energized contact (15) corresponds to the position of the filter housing (6). A power supply device (16) for contacting the energized contact (15) and supplying power is fixedly mounted on the upper left surface of the mounting plate (4).

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