Air supplement type ventilation cabinet for biochemical laboratory

Abstract

The utility model discloses a biochemical laboratory air supplement type fume hood which comprises a fume hood body, exhaust outlets are formed in the two sides of the upper end face of the fume hood body, exhaust fans are installed on the inner sides of the exhaust outlets, a first shell is installed above the exhaust outlets, UV lamp tubes are installed below the two sides of the inner wall of the first shell, and the UV lamp tubes are connected with the exhaust outlets. A transverse groove is formed in the front end face of the first shell, a frame shaped like a Chinese character'hui 'is movably arranged on the inner side of the transverse groove, two activated carbon adsorption plates are movably arranged on the inner side of the frame shaped like the Chinese character'hui', an exhaust pipe is installed above the rear end face of the first shell, and an air supplementing device is installed on the rear end face of the ventilation cabinet body. According to the utility model, waste gas generated by an experiment can be discharged after being treated, so that the environmental protection property is improved, air can be supplemented after external air is filtered, meanwhile, a worker can conveniently clean dust attached to the filter screen, and the subsequent air supplementing effect is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to a ventilation cabinet technical field, concretely is a biochemical laboratory air supplementing type ventilation cabinet. BACKGROUND

[0002] In biochemical laboratory, some toxic and harmful substances are often used to do experiments. At this time, in order to ensure the safety of personnel and prevent the diffusion of toxic substances, operation is usually carried out in a ventilation cabinet. In order to reduce the energy consumption of indoor air conditioning, a supplementary air fan is usually installed to extract outdoor air for air replenishment. In order to prevent air flow from overflowing, the amount of air replenishment is usually not more than 60% of the amount of air extraction.

[0003] In the prior art, a laboratory air supplementing type ventilation cabinet is disclosed in Chinese utility model patent No. CN209969161U. By setting up an air extractor and a supplementary air fan, the air extractor absorbs the air in the main body into the air extraction pipe, stably discharges the air in the main body, maintains the stable discharge of air in the cabinet cavity, realizes the balance of air replenishment and air discharge, improves the laboratory negative pressure environment, and the supplementary air fan absorbs the external air into the air replenishment pipe, stably introduces the air into the main body, maintains the air circulation in the main body, and the ventilation cabinet realizes the balance of air inflow and outflow by absorbing external air, reduces the occurrence of laboratory negative pressure.

[0004] However, when the gas generated by the experiment is toxic and harmful, the gas is only discharged to the outdoor environment by the air extractor, and the gas cannot be treated, which will pollute the outdoor environment of the laboratory. When external air is sucked into the ventilation cabinet, it is not filtered, which will cause dust and other impurities to enter the ventilation cabinet, affect the clean environment required by the experiment, and increase the workload for subsequent cleaning. Therefore, it does not meet the existing needs, and a biochemical laboratory air supplementing type ventilation cabinet is proposed. UTILITY MODEL CONTENTS

[0005] The utility model aims to provide a biochemical laboratory air supplementing type ventilation cabinet to solve the above-mentioned problems in the above-mentioned background technology, such as when the gas generated by the experiment is toxic and harmful, the gas is only discharged to the outdoor environment by the air extractor, and the gas cannot be treated, which will pollute the outdoor environment of the laboratory. When external air is sucked into the ventilation cabinet, it is not filtered, which will cause dust and other impurities to enter the ventilation cabinet, affect the clean environment required by the experiment, and increase the workload for subsequent cleaning.

[0006] To achieve the above object, the utility model provides the following technical scheme: A biochemical laboratory air supplementing type fume hood, including fume hood body, both sides of fume hood body upper end surface are provided with exhaust port, the inboard of exhaust port is installed with exhaust fan, the top of exhaust port is installed with first casing, the lower side of first casing inner wall both sides is installed with UV fluorescent tube, the front end surface of first casing is provided with horizontal groove, the inboard of horizontal groove is movably provided with back frame, the inboard of back frame is movably provided with two activated carbon adsorption plate, the top of first casing rear end surface is installed with exhaust pipe, the rear end surface of fume hood body is installed with air supplementing device, air supplementing device includes second casing, the rear end surface of second casing is installed with air inlet pipe, the inboard of second casing is installed with filter screen, the inner wall of second casing is installed with air pump, the upper end surface of second casing is installed with beating device, beating device includes vertical board, the both sides of vertical board inside are all gap fit with movable rod, the rear end surface of two movable rods is installed with pull plate, the rear of movable rod outer surface is equipped with spring, the front end surface of two movable rods is installed with horizontal plate, the front end surface of horizontal plate is installed with a plurality of beating hammer.

[0007] Preferably, the lower end surface of the first casing is provided with an opening, the opening is connected with the exhaust port, the front end surface of the back frame is provided with a handle, the rear end surface of the inner wall of the first casing is provided with a clamping groove, and the back frame can be clamped into the inner side of the clamping groove.

[0008] Preferably, the upper end surface of the back frame inner wall is provided with a vertical groove, the outer surface of the activated carbon adsorption plate is provided with a connecting plate, the opposite side of the outer surface of each two connecting plates is provided with a slot, the inner side of the slot is inserted with an insertion block, and the opposite side of the outer surface of each two insertion blocks is fixedly connected with a supporting plate.

[0009] Preferably, the air pump is connected with the inside of the fume hood body through a connecting pipe, the lower end surface of the second casing is provided with a dust collecting box, and the dust collecting box is installed on the rear side of the filter screen through a through groove.

[0010] Preferably, the rear of the outer surface of the movable rod is sleeved with a limiting ring, the front end surface of the spring is fixedly connected with the rear end surface of the limiting ring, the rear end surface of the spring is fixedly connected with the front end surface of the pull plate, and the rear end surface of the pull plate is provided with a pull ring.

[0011] Preferably, the lower end surface of the vertical plate is fixedly connected with the upper end surface of the second casing, and the front end of the plurality of beating hammers is attached to the upper side of the rear end surface of the filter screen.

[0012] Compared with the prior art, the utility model has the beneficial effects that:

[0013] 1. The utility model discloses a vent, exhaust fan, back frame body, activated carbon adsorption board, exhaust pipe can be opened through the switch of exhaust fan, and the gas generated in the fume chamber body can be sucked into the first casing through the work of exhaust fan, through being provided with UV lamp tube and activated carbon adsorption board, after the waste gas is cracked into low molecular non-toxic harmless substance through UV lamp tube, then passes the activated carbon adsorption board, filters the waste gas, and the gas after being purified is discharged through the exhaust pipe, the utility model discloses can treat the waste gas generated in the experiment, then discharges the gas, improves the environmental protection,

[0014] 2. The utility model discloses a make -up air device can be filtered after the outside air passes through the filter screen, and is transported into the fume chamber body, and makes up air can prevent dust from entering the fume chamber body, and through being provided with the beating device, can pull the pull -out board back, loosen pull -out board, and spring moves the movable rod forward, and makes movable rod hit filter screen, and makes the dust of filter screen adhesion fall into the inside of dust collecting box, conveniently staff clean the dust of adhesion on the filter screen top, guarantee make -up air effect, the utility model discloses can filter after the outside air, then makes up air, and conveniently staff clean the dust of adhesion on the filter screen, guarantee subsequent make -up air effect. DRAWINGS

[0015] Figure 1 It is the main sectional view of the utility model whole;

[0016] Figure 2 It is the main sectional view of the first casing of the utility model;

[0017] Figure 3 It is the local structure schematic view of the vertical groove of the utility model;

[0018] Figure 4 It is the side sectional view of the make -up air device of the utility model;

[0019] Figure 5 It is the side sectional view of the second casing of the utility model;

[0020] Figure 6 It is the side sectional view of the make -up air device of the utility model.

[0021] In the drawing: 1, fume chamber body; 2, exhaust vent; 3, exhaust fan; 4, first casing; 5, exhaust pipe; 6, UV lamp tube; 7, horizontal groove; 8, back frame body; 9, activated carbon adsorption board; 10, vertical groove; 11, support plate; 12, plug; 13, slot; 14, connecting plate; 15, make -up air device; 1501, air inlet pipe; 1502, filter screen; 1503, air pump; 1504, dust collecting box; 1505, second casing; 16, beating device; 1601, pull -out board; 1602, spring; 1603, vertical plate; 1604, horizontal plate; 1605, beating hammer; 1606, movable rod. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments.

[0023] The air extractor 3 (model number: DPT20-55H) and the air pump 1503 (model number: 2XZ-0.25) mentioned in the utility model can be obtained by market purchase or private customization.

[0024] Please refer to Figures 1 to 6 The utility model provides an embodiment: a biochemical laboratory air supplementing type fume hood, including fume hood body 1, fume hood body 1 upper end surface both sides are provided with air outlet 2, the inboard of air outlet 2 is installed with air extractor 3, the top of air outlet 2 is installed with first casing 4, the inboard of first casing 4 inner wall both sides is installed with UV fluorescent tube 6, the front end surface of first casing 4 is provided with horizontal groove 7, the inboard of horizontal groove 7 is movably provided with back frame body 8, the inboard of back frame body 8 is movably provided with two activated carbon adsorption plate 9, the top of the rear end surface of first casing 4 is installed with air outlet pipe 5, the rear end surface of fume hood body 1 is installed with air supplementing device 15, air supplementing device 15 includes second casing 1505, the rear end surface of second casing 1505 is installed with air inlet pipe 1501, the inboard of second casing 1505 is installed with filter screen 1502, the inner wall of second casing 1505 is installed with air pump 1503, the upper end surface of second casing 1505 is installed with beating device 16, beating device 16 includes vertical plate 1603, the inboard of vertical plate 1603 both sides are all gap fit with movable rod 1606, the rear end surface of two movable rods 1606 is installed with pull plate 1601, the rear of movable rod 1606 outer surface is equipped with spring 1602, the front end surface of two movable rods 1606 is installed with horizontal plate 1604, the front end surface of horizontal plate 1604 is installed with a plurality of beating hammer 1605.

[0025] The lower end surface of first casing 4 is provided with an opening, the opening is connected with the air outlet 2, the front end surface of back frame body 8 is installed with a handle, the rear end surface of first casing 4 inner wall is provided with a clamping groove, and the back frame body 8 can be clamped into the inboard of the clamping groove, the back frame body 8 can be pulled out through the handle, and the stability of the back frame body 8 in the inboard of first casing 4 is improved.

[0026] The upper part of the two sides of the inner wall of the back-shaped frame 8 is provided with a vertical groove 10, and the outer surface of the activated carbon adsorption plate 9 is provided with a connecting plate 14 on both sides, and the opposite side of the outer surface of every two connecting plates 14 is provided with a plug groove 13, and the inner side of the plug groove 13 is inserted with a plug block 12, and the opposite side of the outer surface of every two plug blocks 12 is fixedly connected with a supporting plate 11, so that the two connecting plates 14 can be detached from the upper and lower parts of the supporting plate 11, so that the two activated carbon adsorption plates 9 can be separated and cleaned respectively.

[0027] The air suction pump 1503 is connected with the inside of the fume chamber body 1 through a connecting pipe, and the lower end surface of the second shell 1505 is provided with a dust collection box 1504, which is installed on the rear side below the filter screen 1502 through a through slot. The air sucked by the air suction pump 1503 can enter the inside of the fume chamber body 1 through the connecting pipe after being filtered, and the dust falling from the outer surface of the filter screen 1502 can be collected in the dust collection box 1504.

[0028] The outer surface of the movable rod 1606 is sleeved with a limiting ring at the rear, the front end surface of the spring 1602 is fixedly connected with the rear end surface of the limiting ring, the rear end surface of the spring 1602 is fixedly connected with the front end surface of the pull plate 1601, and the rear end surface of the pull plate 1601 is provided with a pull ring, so that the pull plate 1601 can be pulled through the pull ring, and the stability of the spring 1602 is improved.

[0029] The lower end surface of the vertical plate 1603 is fixedly connected with the upper end surface of the second shell 1505, and the front ends of the plurality of beating hammers 1605 are in close contact with the upper part of the rear end surface of the filter screen 1502, so as to improve the stability of the connection of the vertical plate 1603. The pull plate 1601 is pulled backward, the pull plate 1601 is loosened, the spring 1602 drives the movable rod 1606 to move forward, and the movable rod 1606 hits the filter screen 1502.

[0030] The biochemical laboratory air supplementing type fume hood, when in use, first connects the power supply, can pass through the opening of the air extractor 3 switch, the air extractor 3 work can be the gas generated in the fume hood body 1 into the first shell 4, through the setting has UV lamp 6 and active carbon adsorption plate 9, waste gas after UV lamp 6 is cracked into low molecular non-toxic harmless material, then through the active carbon adsorption plate 9, waste gas is filtered, the gas after being purified is discharged through the exhaust pipe 5, simultaneously through the setting has the air supplementing device 15, can filter the air of outside through the filter screen 1502, and is transported into the fume hood body 1, carries out air supplementing, can prevent dust from entering the fume hood body 1, and through the setting has the knock device 16, can pull the pull plate 1601 back, loosens the pull plate 1601, the spring 1602 drives the movable rod 1606 to move forward, makes the movable rod 1606 impact filter screen 1502, makes the dust attached to filter screen 1502 fall into the inside of dust collection box 1504, facilitates the staff to clean the dust attached above filter screen 1502, guarantees the air supplementing effect, the utility model can handle the waste gas generated in the experiment, then discharges the gas, improves the environmental protection, can filter the air of outside, then carries out air supplementing, and facilitates the staff to clean the dust attached on filter screen 1502, guarantees the subsequent air supplementing effect.

[0031] It is obvious to those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, and the present application can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be regarded as exemplary and non-limiting, and the scope of the present application is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application. Any reference signs in the claims should not be regarded as limiting the claims involved.

Claims

1. A biochemical laboratory fume hood of the make-up air type, comprising a fume hood body (1), characterized in that: The both sides of the upper end face of the fume hood body (1) are provided with exhaust openings (2), the inner side of the exhaust opening (2) is provided with an exhaust fan (3), the upper side of the exhaust opening (2) is provided with a first shell (4), the lower side of the inner wall of the first shell (4) is provided with a UV lamp tube (6), the front end face of the first shell (4) is provided with a horizontal groove (7), the inner side of the horizontal groove (7) is movably provided with a back frame (8), the inner side of the back frame (8) is movably provided with two active carbon adsorption plates (9), the upper side of the rear end face of the first shell (4) is provided with an exhaust pipe (5), the rear end face of the fume hood body (1) is provided with a make-up air device (15), the make-up air device (15) comprises a second shell (1505), the rear end face of the second shell (1505) is provided with an air inlet pipe (1501), the inner side of the second shell (1505) is provided with a filter screen (1502), the inner wall of the second shell (1505) is provided with an air suction pump (1503), the upper end face of the second shell (1505) is provided with a knocking device (16), the knocking device (16) comprises a vertical plate (1603), the both sides of the inside of the vertical plate (1603) are gap fitted with movable rods (1606), the rear end face of the two movable rods (1606) is provided with a pull plate (1601), the rear of the outer surface of the movable rod (1606) is provided with a spring (1602), the front end face of the two movable rods (1606) is provided with a horizontal plate (1604), the front end face of the horizontal plate (1604) is provided with a plurality of knocking hammers (1605).

2. The biochemical laboratory fume hood of claim 1, wherein: The lower end face of the first shell (4) is provided with an opening, the opening is connected with the exhaust opening (2), the front end face of the back frame (8) is provided with a handle, the rear end face of the inner wall of the first shell (4) is provided with a clamping groove, and the back frame (8) can be clamped into the inner side of the clamping groove.

3. The biochemical laboratory fume hood of claim 1, wherein: The upper side of the both sides of the inner wall of the back frame (8) is provided with a vertical groove (10), the both sides of the outer surface of the active carbon adsorption plate (9) are provided with a connecting plate (14), the opposite side of the outer surface of every two connecting plates (14) is provided with a slot (13), the inner side of the slot (13) is inserted with an insertion block (12), the opposite side of the outer surface of every two insertion blocks (12) is fixedly connected with a supporting plate (11).

4. The biochemical laboratory fume hood of claim 1, wherein: The air suction pump (1503) is connected with the inside of the fume hood body (1) through a connecting pipe, the lower end face of the second shell (1505) is provided with a dust collecting box (1504), the dust collecting box (1504) is installed on the rear side of the filter screen (1502) through a through groove.

5. The biochemical laboratory fume hood of claim 1, wherein: The rear of the outer surface of the movable rod (1606) is provided with a limiting ring, the front end face of the spring (1602) is fixedly connected with the rear end face of the limiting ring, the rear end face of the spring (1602) is fixedly connected with the front end face of the pull plate (1601), the rear end face of the pull plate (1601) is provided with a pull ring.

6. The biochemical laboratory fume hood of claim 1, wherein: The lower end surface of the vertical plate (1603) is fixedly connected with the upper end surface of the second shell (1505), and the front ends of the plurality of beating hammers (1605) are attached to the upper side of the rear end surface of the filter screen (1502).

Images