Air supplement type ventilation cabinet

Abstract

The utility model discloses an air supplement type ventilation cabinet which comprises a cabinet body, an operation space is arranged in the cabinet body, an operation table top is arranged at the bottom of the operation space, and an exhaust port is formed in the top of the cabinet body. An air inlet is formed in the front side of the operation table top, the air inlet is formed in an air inlet cavity, side channels communicated with the atmosphere are arranged on the left side and the right side of the operation space respectively, and the lower ends of the side channels are communicated with the air inlet cavity; and a protective net cover is arranged on the air inlet. By the adoption of the technical scheme, the air inlet is formed in the front side of the operation table face and is close to a harmful substance generation area, and when the exhaust port in the top of the cabinet body extracts air upwards, an air channel is formed between the air inlet and the exhaust port, so that the air in the harmful substance area can be directly sucked away, and the ventilation effect is improved. And it is ensured that harmful gas is exhausted faster and more effectively.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of air-supplying fume hood, belong to laboratory equipment technical field. BACKGROUND

[0002] Ventilated cabinet is a kind of equipment used in laboratory, hospital, factory and the like environment, for controlling the diffusion and discharge of harmful gas, dust and chemical substance. Ventilated cabinet provides a safe working environment by forced air flow and filtration, protects operating personnel and environment from harmful substances. One of the main functions of the ventilated cabinet is to discharge harmful gas, which is led out of the room through the exhaust system to prevent harm to operating personnel and indoor environment. The top of the cabinet body usually has an exhaust port, which discharges harmful gas through a pipe, such as the ventilated cabinet disclosed in Chinese patent document CN210876688U, and the air-supplying ventilated cabinet disclosed in Chinese patent document CN210386907U. Since the exhaust port is generally arranged at the top of the cabinet body, the air in the upper region of the cabinet body will be drawn out first when the air is drawn outwards. However, harmful gas is usually generated from the substances on the operating table in the cabinet body, and direct air suction in the area close to the operating table can improve the discharge efficiency of harmful gas. In addition, the existing ventilated cabinet does not have a channel specially arranged to connect the internal space of the cabinet body to the outside atmosphere. When air is drawn, the air pressure in the ventilated cabinet decreases, and the outside atmosphere can only enter the internal space of the cabinet body through the gaps in the cabinet body, which greatly affects the ventilation efficiency. SUMMARY

[0003] Therefore, the purpose of the present utility model is to overcome the defects in the prior art and provide an air-supplying ventilated cabinet.

[0004] To achieve the above purpose, the air-supplying ventilated cabinet of the present utility model comprises a cabinet body, an operating space is arranged in the cabinet body, the bottom of the operating space is an operating table, and an exhaust port is arranged at the top of the cabinet body. An air inlet is arranged on the front side of the operating table, the air inlet is arranged on an air inlet cavity, side channels are arranged on the left and right sides of the operating space, and the lower ends of the side channels are connected to the air inlet cavity. A protective mesh cover is arranged on the air inlet.

[0005] The air inlet cavity is long and narrow, and its left and right ends extend to the left and right sides of the operating space.

[0006] The air inlet is a long and narrow opening extending in the left-right direction.

[0007] The air inlet is arranged on the front side of the upper end of the air inlet cavity.

[0008] A vertical plate part extending upward is arranged on the front side of the air inlet, and the protective mesh cover is connected to the top end of the vertical plate part.

[0009] A plurality of support plates are arranged below the protective screen.

[0010] A top channel is arranged above the operation space, top ends of the two side channels are connected to the top channel, and an atmosphere port communicating with the atmosphere is arranged on the top channel.

[0011] A partition plate is arranged in the top channel and at the position of the atmosphere port, and the partition plate divides the top channel into two parts.

[0012] A filtering device is arranged in the top channel or the side channel.

[0013] By using the above technical scheme, compared with the prior art, the air supplementing type fume hood has the following beneficial effects:

[0014] 1. The air inlet is arranged at the front side of the operation table top and close to the harmful substance generating area, the air exhaust port at the top of the cabinet body draws air upward, and an air duct is formed between the air inlet and the air exhaust port, which is beneficial to directly draw away the air in the harmful substance area and ensure that the harmful gas is discharged more quickly and effectively.

[0015] 2. The side channel is communicated with the atmosphere, and the outside air is introduced into the cabinet body through the air inlet cavity, and the ventilation efficiency is improved.

[0016] 3. The long strip-shaped air inlet cavity and air inlet ensure that the air flow into the operation space is more uniform, and prevent the problem of poor air flow in some areas.

[0017] 4. The protective screen and the support plate arranged in front of the air inlet can prevent foreign matters from entering and ensure smooth air flow, and provide more safety protection for the operator.

[0018] 5. The design of the vertical plate part and the protective screen makes the air inlet direction inclined to the upper rear side, avoiding the harmful gas from diffusing to the outside of the operation space.

[0019] 6. The partition plate in the top channel divides the air flow path, and in combination with the filtering device, effectively filters the air entering the fume hood, ensures clean air flow and maintains a good working environment. DETAILED DESCRIPTION

[0020] Figure 1 It is a structural schematic view of the utility model.

[0021] Figure 2 It is a local partial schematic view of the utility model.

[0022] Figure 3 It is a structural schematic view of the air supplementing channel.

[0023] Figure 4A decomposition schematic view of the air inlet cavity. DETAILED DESCRIPTION

[0024] The utility model will be further explained in detail through the drawings and specific embodiments.

[0025] As Figures 1-4 shown, the utility model relates to a kind of air supplementing type fume hood, including cabinet 1, operating space is set in cabinet 1, the bottom of operating space is operation table top 2, front side is lift door.Cabinet 1 top is provided with exhaust port 3, air-permeable baffle 4 is set below exhaust port 3, air-permeable baffle 4 is provided with several air-permeable holes 5, exhaust port 3 is connected with negative pressure fan, and negative pressure fan is used to extract the air in operating space outward.

[0026] Air inlet 6 is provided in the front side of the operation table top 2, and the air inlet 6 is provided on the front side of the upper end of an air inlet cavity 7, and side passages 8 are provided on the left and right sides of the operating space and are communicated with the atmosphere, and the lower ends of the side passages 8 are communicated with the air inlet cavity 7; a protective mesh cover 9 is provided on the air inlet 6. The air inlet 6 is provided on the front side of the operation table top 2, close to the harmful substance generating area, and when the exhaust port 3 on the top of the cabinet 1 extracts air upward, an air duct is formed between the air inlet 6 and the exhaust port 3, which is beneficial to directly extract the air in the harmful substance area and ensure that the harmful gas is discharged faster and more effectively.

[0027] In the embodiment, the air inlet cavity 7 is long strip-shaped, and the left and right ends thereof extend to the left and right sides of the operating space. At the same time, the air inlet 6 is also provided as a long strip-shaped opening extending in the left-right direction. A vertical plate portion 10 extending upward is provided on the front side of the air inlet 6, and the protective mesh cover 9 is connected to the top end of the vertical plate portion 10, and a plurality of support plates 11 are provided below the protective mesh cover 9. The long strip-shaped air inlet cavity 7 and air inlet 6 ensure that the air flowing into the operating space is more uniform, and prevent the problem of poor air flow in some areas. The design of the vertical plate portion 10 and the protective mesh cover 9 makes the air inlet direction inclined towards the upper rear side, avoiding the diffusion of harmful gas to the outside of the operating space.

[0028] A top passage 12 is provided above the operating space, and the top ends of the two side passages 8 are connected to the top passage 12, and an atmosphere port 13 communicated with the atmosphere is provided on the top passage 12. A partition plate 14 is provided in the top passage 12 and located at the position of the atmosphere port 13, and the partition plate 14 divides the top passage 12 into two parts.

[0029] A filter device is provided in the top passage 12 or the side passage 8, so that the air entering the operating space can be filtered and purified, avoiding impurities and dust in the air from entering the cabinet 1 and affecting the experimental effect.

[0030] Obviously, the above embodiments are only examples for clearly illustrating the present application and are not intended to limit the present application. Based on the above description, other different forms of changes or variations can be made by those skilled in the art. Here, all the embodiments are not required to be exhausted, and the obvious changes or variations derived therefrom are still within the protection scope of the present application.

Claims

1. A fume hood of the make-up air type characterized in that: The cabinet includes a cabinet body, an operation space is arranged in the cabinet body, a bottom of the operation space is an operation table, an exhaust port is arranged on a top of the cabinet body; an air inlet is arranged on a front side of the operation table, the air inlet is arranged on an air inlet cavity, side passages are arranged on left and right sides of the operation space respectively, and the side passages are communicated with the atmosphere, lower ends of the side passages are communicated with the air inlet cavity; a protective mesh cover is arranged on the air inlet.

2. The enlrged fume hood according to claim 1, wherein: The air inlet cavity is long strip-shaped, and left and right ends of the air inlet cavity extend to the left and right sides of the operation space.

3. The enlrged fume hood according to claim 2, wherein: The air inlet is a long strip-shaped opening extending in a left-right direction.

4. The enlrged fume hood according to claim 3, wherein: The air inlet is arranged on a front side upper end of the air inlet cavity.

5. The enlrged fume hood according to claim 4, wherein: A vertical plate part extending upward is arranged on a front side of the air inlet, and the protective mesh cover is connected to a top end of the vertical plate part.

6. The enlrged fume hood according to claim 5, wherein: A plurality of support plates are arranged below the protective mesh cover.

7. A make-up air ventilation hood according to any one of claims 1-6, characterized in that: A top passage is arranged above the operation space, top ends of the two side passages are connected to the top passage, and an atmosphere port communicated with the atmosphere is arranged on the top passage.

8. The enlrged fume hood according to claim 7, wherein: A partition plate is arranged in the top passage and at a position of the atmosphere port, and the partition plate divides the top passage into two parts.

9. The enlrged fume hood of claim 7, wherein: A filter device is arranged in the top passage or the side passage.

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