Ventilation cabinet for laboratory temperature and humidity

Abstract

The utility model relates to the technical field of fume cupboards, and discloses a fume cupboard for laboratory humiture, which comprises a cupboard body and a filter screen, the upper chamber of the cupboard body is provided with a connecting groove, and the inner side wall and the inner top wall of the upper chamber of the cupboard body are provided with air suction holes communicated with the connecting groove. A gas collecting hood communicated with the connecting groove is fixedly installed on the inner top wall of the lower cavity of the cabinet body, a draught fan is fixedly installed on the front side wall of the lower cavity of the cabinet body, and the air inlet end of the draught fan is communicated with an air inlet pipe. According to the ventilation cabinet for laboratory temperature and humidity, the replacement assembly is arranged, after the replacement assembly is used, a movable door is pulled, the movable door, a fixing frame and a placement plate are made to rotate along the axis of a movable shaft, and the placement plate between a gas collecting hood and an air inlet pipe is made to be rotated out; the filter screen can be ejected out from bottom to top to be replaced, impurities gathered on the filter screen can be discharged by the way, and operation is easy and convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of fume hoods, in particular to a fume hood used for controlling temperature and humidity in laboratories. Background Art

[0002] Laboratory fume hoods are used to conduct experiments that produce chemical waste gas. A fan is embedded in the upper part of the cabinet to transport the waste gas generated by the experiment to the outside or to a filtering mechanism.

[0003] After retrieval, Chinese patent CN220461689U was found and announced a laboratory fume hood, in which a hose is connected to the bottom of the fan through a fixed pipe, the bottom end of the hose is connected to a wind bucket through a hard pipe, the hard pipe is connected to an electric push rod through a cross plate, the electric push rod is controlled by a screw, and the left and right, up and down, front and back positions of the wind bucket can be adjusted and changed through the screw, the electric push rod and the cross plate, respectively, so as to facilitate the targeted adsorption of exhaust gas at the experimental position in the cabinet to prevent the exhaust gas from being emitted to the indoor polluting environment. It can be seen that the patent realizes the adsorption of the experimental position. In addition, an activated carbon filter, a filter nylon mesh cloth and a glass fiber filter plate are arranged in the fixed pipe. After long-term use, the filtering structures such as the activated carbon filter, the filter nylon mesh cloth and the glass fiber filter plate will be blocked as impurities accumulate, affecting the filtering effect. For this reason, the filtering structure needs to be replaced to ensure a good filtering effect. Therefore, a fume hood for laboratory temperature and humidity is proposed. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a fume hood for laboratory temperature and humidity, which has the advantage of being easy to replace the filter structure.

[0005] In order to achieve the above-mentioned purpose of facilitating the replacement of the filter structure, the utility model provides the following technical solutions: a fume hood for laboratory temperature and humidity, comprising a cabinet and a filter screen, the upper chamber of the cabinet is provided with a connecting groove, the inner side wall and the inner top wall of the upper chamber of the cabinet are provided with air suction holes connected to the connecting groove, the inner top wall of the lower chamber of the cabinet is fixedly installed with an air collecting hood connected to the connecting groove, the front side wall of the lower chamber of the cabinet is fixedly installed with a fan, the air inlet end of the fan is connected with an air inlet pipe, and the cabinet is provided with a replacement component that is convenient for replacing the filter screen and discharging impurities on the filter screen;

[0006] The replacement assembly includes a movable shaft, a movable door, a fixed frame, a placement plate and a stepped hole. The movable shaft is rotatably connected in the lower chamber of the cabinet, the movable door is fixedly installed on the outer surface of the movable shaft, the fixed frame is fixedly installed on the outer surface of the movable door, the placement plate is fixedly installed on a side of the fixed frame away from the movable door, and the stepped hole is opened in the placement plate.

[0007] Furthermore, the filter screen assembly is located within the inner wall of the stepped hole. The filter screen is in the shape of a quadrangular prism, the connecting groove is in the shape of a U, and a handle is fixedly installed on the outer surface of the movable door.

[0008] Furthermore, a fixed block is fixedly installed on the front wall of the cabinet body. A bolt that blocks the movable door is inserted into the fixed block. The bolt is in the shape of a quadrangular prism, and a baffle is slidably connected to the side wall of the cabinet body.

[0009] Furthermore, a water tank is inserted and placed in the upper chamber of the cabinet body, and a water pipe is installed outside the water tank in the upper chamber of the cabinet body.

[0010] Furthermore, a UV photolysis purifier is fixedly installed on the inner bottom wall of the lower chamber of the cabinet body. The air outlet end of the fan is communicated with an air outlet pipe that is communicated with the UV photolysis purifier. The air outlet end of the UV photolysis purifier is communicated with an air outlet pipe fixed to the cabinet body, and a switching valve is installed on the outer surface of the air outlet pipe.

[0011] Furthermore, a reflux assembly for improving the degree of gas photolysis is provided on the air outlet pipe and the air outlet pipe. The reflux assembly includes a reflux pipe and an electric control valve. The reflux pipe is communicated between the air outlet pipe and the air outlet pipe, and the electric control valve is installed on the reflux pipe.

[0012] Compared with the prior art, the present utility model provides a fume hood for laboratory temperature and humidity, which has the following beneficial effects:

[0013] For the fume hood for laboratory temperature and humidity, by setting a replacement assembly, after the replacement assembly is used, the movable door is pulled, so that the movable door, the fixed frame and the placement plate rotate along the axis of the movable shaft, so that the placement plate between the air collecting hood and the air inlet pipe can be rotated out. Since the filter screen is inserted in the stepped hole, the filter screen can be pushed out from bottom to top for replacement, and impurities are gathered on the filter screen, and the impurities can be discharged by the way. The operation is simple and convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a front-side three-dimensional schematic diagram of the structure of the present utility model;

[0015] Figure 2 is a lower-side three-dimensional schematic diagram of the structure of the present utility model;

[0016] Figure 3 is an upper-side three-dimensional sectional view of the structure of the present utility model.

[0017] In the figure: 1 cabinet body, 2 filter screen, 3 connection groove, 4 air suction hole, 5 air collecting hood, 6 fan, 7 air inlet pipe, 8 replacement component, 81 movable shaft, 82 movable door, 83 fixing bracket, 84 placing plate, 85 stepped hole, 9 fixing block, 10 bolt, 11 baffle plate, 12 water tank, 13 water pipe, 14 UV photolysis purifier, 15 air outlet pipe, 16 air outlet tube, 17 switch valve, 18 reflux component, 181 reflux pipe, 182 electric control valve. Specific embodiments

[0018] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0019] Please refer to Figure 1-3 , a fume hood for the temperature and humidity in a laboratory, including a cabinet body 1 and a filter screen 2, which is used to filter the gas entering the cabinet body 1. The filter screen 2 is in the shape of a quadrangular prism. A connection groove 3 is opened in the upper chamber of the cabinet body 1, and the connection groove 3 is in the shape of a U. Air suction holes 4 communicating with the connection groove 3 are opened on the inner side wall and the inner top wall of the upper chamber of the cabinet body 1, which are used to suck the gas in the laboratory. The inner top wall of the lower chamber of the cabinet body 1 is fixedly installed with an air collecting hood 5 communicating with the connection groove 3, and the gas is concentrated in the air collecting hood 5.

[0020] Among them, the front side wall of the lower chamber of the cabinet body 1 is fixedly installed with a fan 6. The air inlet end of the fan 6 is communicated with an air inlet pipe 7. A fixing block 9 is fixedly installed on the front wall of the cabinet body 1. A baffle plate 11 is slidably connected to the side wall of the cabinet body 1, which reduces the entry of impurities into the fume hood when the fume hood is not working. A water tank 12 is inserted and placed in the upper chamber of the cabinet body 1, and a water pipe 13 is installed outside the water tank 12 in the upper chamber of the cabinet body 1.

[0021] In addition, a UV photolysis purifier 14 is fixedly installed on the inner bottom wall of the lower chamber of the cabinet body 1, which is used to crack the laboratory gas to achieve the purpose of purification. The air outlet end of the fan 6 is communicated with an air outlet pipe 15 communicating with the UV photolysis purifier 14. The gas outlet end of the UV photolysis purifier 14 is communicated with an air outlet tube 16 fixed to the cabinet body 1, and a switch valve 17 is installed on the outer surface of the air outlet tube 16.

[0022] In addition, a reflux component 18 for improving the degree of gas photolysis is provided on the air outlet pipe 15 and the gas outlet pipe 16. The reflux component 18 includes a reflux pipe 181 and an electrically controlled valve 182. The reflux pipe 181 is connected between the air outlet pipe 15 and the gas outlet pipe 16. The cracked gas can return to the air outlet pipe 15 through the reflux pipe 181 to be cracked and purified again, thereby improving the degree of gas purification. The premise is that the electrically controlled valve 182 is to be opened, the switch valve 17 is to be closed, and the electrically controlled valve 182 is installed on the reflux pipe 181.

[0023] See also Figure 1-3 A replacement assembly 8 is provided on the cabinet 1 for facilitating the replacement of the filter 2 and the discharge of impurities on the filter 2. The replacement assembly 8 includes a movable shaft 81, a movable door 82, a fixing frame 83, a placement plate 84 and a stepped hole 85. The movable shaft 81 is rotatably connected in the lower chamber of the cabinet 1, and the movable door 82 is fixedly installed on the outer surface of the movable shaft 81. The movable door 82 can rotate around the axis of the movable shaft 81. A handle is fixedly installed on the outer surface of the movable door 82, which is convenient for pulling the movable door 82 to replace the filter 2.

[0024] In addition, a latch 10 is inserted and pulled out of the fixed block 9 to block the movable door 82, thereby limiting the rotation of the movable door 82 and preventing the movable door 82 from rotating between the gas collecting hood 5 and the air inlet pipe 7, thereby effectively filtering the gas. The latch 10 is in the shape of a quadrangular prism, and the fixing frame 83 is fixedly mounted on the outer surface of the movable door 82. The placement plate 84 is fixedly mounted on the side of the fixing frame 83 away from the movable door 82. The stepped hole 85 is provided in the placement plate 84, and the filter screen 2 is combined in the inner wall of the stepped hole 85. The filter screen 2 is combined in the stepped hole 85 in a plug-in manner, which is convenient for removing and replacing the filter screen 2 and discharging filtered impurities.

[0025] When the present embodiment is in use, the latch 10 is pulled out and the movable door 82 is no longer blocked. Then, the handle is pulled and the movable door 82 rotates and is opened, driving the corresponding fixing frame 83 and the placement plate 84 to move. The filter screen 2 is pulled out and pushed out from the bottom to the top to discharge the impurities on the filter screen 2. Then, a new filter screen 2 is placed in the stepped hole 85, the movable door 82 is closed, and the filter screen 2 moves to between the air collecting hood 5 and the air inlet pipe 7. The latch 10 is inserted to limit the movement of the movable door 82, thereby completing the discharge of impurities and the replacement of the filter screen 2.

[0026] The beneficial effects of the above embodiments are:

[0027] The fume hood for laboratory temperature and humidity is provided with a replacement component 8. After the replacement component 8 is used, the movable door 82 is pulled to rotate the movable door 82, the fixing frame 83 and the placement plate 84 along the axis of the movable shaft 81, so that the placement plate 84 between the air collecting hood 5 and the air inlet pipe 7 can be rotated out. Since the filter screen 2 is inserted in the stepped hole 85, the filter screen 2 can be pushed out from bottom to top for replacement, and the impurities gathered on the filter screen 2 can be discharged by the way, which is simple and convenient to operate.

[0028] The electrical components appearing in the article are all electrically connected to the main controller and the power supply. The main controller can be a conventional known device for control such as a computer, and the existing public power connection technology is not described in detail in the article.

[0029] 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.

[0030] 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 for laboratory temperature and humidity, comprising a cabinet (1) and a filter (2), the upper chamber of the cabinet (1) being provided with a connecting groove (3), the inner side wall and the inner top wall of the upper chamber of the cabinet (1) being provided with air suction holes (4) connected to the connecting groove (3), the inner top wall of the lower chamber of the cabinet (1) being fixedly installed with an air collecting hood (5) connected to the connecting groove (3), the front side wall of the lower chamber of the cabinet (1) being fixedly installed with a fan (6), the air inlet end of the fan (6) being connected to an air inlet pipe (7), characterized in that: A replacement component (8) is provided on the cabinet body (1) to facilitate the replacement of the filter screen (2) and the discharge of impurities on the filter screen (2); The replacement component (8) includes a movable shaft (81), a movable door (82), a fixing frame (83), a placing plate (84) and a stepped hole (85). The movable shaft (81) is rotatably connected in the lower chamber of the cabinet body (1). The movable door (82) is fixedly installed on the outer surface of the movable shaft (81). The fixing frame (83) is fixedly installed on the outer surface of the movable door (82). The placing plate (84) is fixedly installed on the side of the fixing frame (83) away from the movable door (82). The stepped hole (85) is formed in the placing plate (84).

2. A fume hood for laboratory temperature and humidity according to claim 1, characterized in that: The filter screen (2) is combined in the inner wall of the stepped hole (85). The shape of the filter screen (2) is a quadrangular prism. The shape of the connecting groove (3) is a U-shaped. A handle is fixedly installed on the outer surface of the movable door (82).

3. A fume hood for laboratory temperature and humidity according to claim 1, characterized in that: A fixing block (9) is fixedly installed on the front wall of the cabinet body (1). A plug pin (10) that blocks the movable door (82) is inserted into the fixing block (9). The shape of the plug pin (10) is a quadrangular prism. A baffle (11) is slidably connected to the side wall of the cabinet body (1).

4. A fume hood for laboratory temperature and humidity according to claim 1, characterized in that: A water tank (12) is inserted and placed in the upper chamber of the cabinet body (1). A water pipe (13) is installed outside the water tank (12) in the upper chamber of the cabinet body (1).

5. A fume hood for laboratory temperature and humidity according to claim 1, characterized in that: A UV photolysis purifier (14) is fixedly installed on the inner bottom wall of the lower chamber of the cabinet body (1). The air outlet end of the fan (6) is communicated with an air outlet pipe (15) that is communicated with the UV photolysis purifier (14). The air outlet end of the UV photolysis purifier (14) is communicated with an air outlet pipe (16) fixed to the cabinet body (1). A switching valve (17) is installed on the outer surface of the air outlet pipe (16).

6. A fume hood for laboratory temperature and humidity according to claim 5, characterized in that: A reflux component (18) for improving the degree of gas photolysis is provided on the air outlet pipe (15) and the air outlet pipe (16). The reflux component (18) includes a reflux pipe (181) and an electric control valve (182). The reflux pipe (181) is communicated between the air outlet pipe (15) and the air outlet pipe (16). The electric control valve (182) is installed on the reflux pipe (181).

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