An air scoop

Abstract

The utility model discloses a kind of air volume covers, including cover and pedestal, the upper surface of cover is connected with adsorption disc, the right side surface of adsorption disc is connected with suction pipe, the right side surface of pedestal is connected with wind box, the right side surface of wind box is connected with negative pressure fan, the right side surface of negative pressure fan is connected with motor, the upper surface of negative pressure fan is connected with connecting pipe, the front of wind box is connected with air release valve;The utility model passes through setting motor drives negative pressure fan to utilize suction pipe to extract the air inside adsorption disc, so that inside is in vacuum state, so that it is adsorbed at air port, and then make staff can free hands to detect, avoid when air port too high or need long time detection, need staff to hold in one hand and detect, simultaneously avoid the fatigue of long time hand-held air volume cover, so that staff can be more focused on detection operation, also avoid the problem that the edge leaks air due to shaking, leading to inaccurate detection.

Description

Technical Field

[0001] This utility model relates to the technical field of air volume detection equipment, specifically an air volume hood. Background Technology

[0002] An airflow hood is a device used to measure airflow in air conditioning, ventilation, or exhaust systems. It is usually made of a soft material and can be easily wrapped around the air vent or the outlet of a ventilation duct. The use of an airflow hood usually requires the use of an anemometer. By measuring the wind speed at a point inside the hood and calculating the cross-sectional area of ​​the area covered by the airflow hood, the airflow can be calculated. When using it, it is important to ensure that the airflow hood completely seals the air vent to obtain accurate measurement results.

[0003] A search revealed that invention patent CN111323093A discloses an airflow hood, comprising: a frame extending linearly into a closed loop, with multiple electromagnets disposed on the upper surface of the frame, and sealing elements disposed between the electromagnets; the electromagnets having energized and de-energized states; and a surrounding fabric forming a closed loop, with an air duct formed within the fabric extending vertically and opening at the upper and lower edges of the fabric. When the electromagnets are energized, the frame can be attached to the corrugated steel sheet of the roof; when the electromagnets are de-energized, the frame can be easily separated from the corrugated steel sheet. The sealing elements, disposed between the electromagnets, provide a sealing effect to ensure measurement accuracy. Compared to existing technologies where the sealing elements are positioned above the magnets, the sealing elements of this invention are less prone to damage.

[0004] However, the above design still has shortcomings. While the design solves the problem of the seals not being easily damaged, when the air vent is too high or when long-term testing is required, the operator needs to hold the vent with one hand to perform the test. This not only causes the operator's arm to ache, but also causes air leakage at the edges due to unstable holding, resulting in inaccurate testing. Therefore, we propose an airflow hood to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide an airflow cover to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an air volume hood, comprising a hood body and a base, wherein an adsorption plate is connected to the upper surface of the hood body, an air extraction pipe is connected to the right side of the adsorption plate, an air box is connected to the right side of the base, a negative pressure fan is connected to the right side of the air box, a motor is connected to the right side of the negative pressure fan, a connecting pipe is connected to the upper surface of the negative pressure fan, the end of the connecting pipe away from the negative pressure fan is connected to the end of the air extraction pipe, and an air release valve is connected to the front of the air box.

[0007] The inner wall of the cover is connected to a support plate, the upper surface of the support plate is fitted with an adjustment plate, and the upper surface of the support plate is connected to a set of clamping blocks.

[0008] The base has a control panel connected to its front side and a power reserve installed inside.

[0009] The inner wall of the cover is connected to a wind pressure sensor, and the bottom surface of the wind pressure sensor is connected to a transmission line.

[0010] The base has a telescopic rod threadedly connected to its bottom surface, a sleeve slidably connected to the outer surface of the telescopic rod, and a handle connected to the bottom surface of the sleeve.

[0011] Compared with the prior art, the beneficial effects of this utility model are: This invention uses a motor-driven negative pressure fan to extract air from the adsorption plate through an air extraction pipe, creating a vacuum inside. This allows the adsorption plate to adhere to the air outlet, freeing up the operator's hands for testing. This avoids the need for operators to hold the air hood with one hand when the air outlet is too high or when testing is required for a long time, thus preventing fatigue from holding the air hood for extended periods. This allows operators to focus more on the testing operation, improving work efficiency and preventing air leakage at the edges of the hood due to shaking, which could lead to inaccurate testing. Attached Figure Description

[0012] Figure 1 This is a three-dimensional structural diagram of an airflow hood from a frontal view according to the present invention; Figure 2 This is a three-dimensional structural diagram of an airflow hood from a top-down perspective according to the present invention; Figure 3 This is a three-dimensional cross-sectional view of the airflow hood according to the present invention. Figure 4 This utility model relates to an airflow hood. Figure 1 Schematic diagram of the three-dimensional structure of part A in the middle.

[0013] In the diagram: 1. Cover; 2. Base; 3. Control panel; 4. Handle; 5. Sleeve; 6. Telescopic rod; 7. Connecting pipe; 8. Suction pipe; 9. Adjusting plate; 10. Adsorption plate; 11. Clamping block; 12. Transmission line; 13. Support plate; 14. Wind pressure sensor; 15. Vent valve; 16. Air box; 17. Negative pressure fan; 18. Motor. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0015] Please see Figure 1-4 This utility model provides a technical solution: an air volume hood, including a hood body 1 and a base 2. An adsorption plate 10 is connected to the upper surface of the hood body 1, and an air extraction pipe 8 is connected to the right side of the adsorption plate 10. An air box 16 is connected to the right side of the base 2, and a negative pressure fan 17 is connected to the right side of the air box 16. A motor 18 is connected to the right side of the negative pressure fan 17, and a connecting pipe 7 is connected to the upper surface of the negative pressure fan 17. The end of the connecting pipe 7 away from the negative pressure fan 17 is connected to the end of the air extraction pipe 8. An air release valve 15 is connected to the front of the air box 16.

[0016] The inner wall of the cover 1 is connected to a support plate 13, and an adjustment plate 9 is snapped onto the upper surface of the support plate 13. The design of the adjustment plate 9 allows users to change it according to the size and shape of the air vent, so that the air volume cover can adapt to air vents of different sizes and shapes. This adjustability improves the versatility and range of use of the air volume cover. A set of clamping blocks 11 are connected to the upper surface of the support plate 13.

[0017] The base 2 is connected to a control panel 3 on its front. The control panel 3 can display measurement data in real time, allowing users to monitor the working status and measurement results of the airflow hood instantly, facilitating timely adjustments and optimizations. The base 2 is equipped with a backup power supply.

[0018] The inner wall of the cover 1 is connected to a wind pressure sensor 14, and the bottom surface of the wind pressure sensor 14 is connected to a transmission line 12. The connection design between the wind pressure sensor 14 and the transmission line 12 makes it easier to operate the wind pressure sensor 14 when it needs to be replaced or maintained, without the need for a complicated disassembly process.

[0019] The base 2 has a threaded connection to a telescopic rod 6 on its bottom surface. The threaded connection of the telescopic rod 6 ensures that it can be freely disassembled for easy storage. The outer surface of the telescopic rod 6 is slidably connected to a sleeve 5, and the bottom surface of the sleeve 5 is connected to a handle 4. The handle 4 allows the user to operate the airflow cover by hand, which is especially convenient when it is necessary to adjust the position of the airflow cover or to perform multi-point measurements.

[0020] Working principle: In use, the operator first fixes the telescopic rod 6 to the bottom of the base 2 via a threaded connection, making disassembly and installation more convenient and facilitating storage after use. The height is adjusted by pulling the telescopic rod 6 inside the sleeve 5. Then, the airflow hood is lifted by holding the handle 4. An adjusting plate 9 of the same size as the air outlet to be tested is selected and secured with the clamping block 11, thereby improving the versatility and application range of the airflow hood. Subsequently, the motor 18 drives the negative pressure fan 17, generating negative pressure, which is then transmitted through the air box 16, connecting pipe 7, and... With the help of the exhaust pipe 8, the air inside the adsorption plate 10 is evacuated, creating a vacuum state inside, which allows the adsorption plate to adhere to the air outlet. This frees up the operator's hands for testing, avoiding the need for one hand to hold the air outlet when it is too high or when testing is required for a long time. This also avoids fatigue from holding the air volume cover for a long time, allowing the operator to focus more on the testing operation, improving work efficiency, and preventing air leakage at the edge of the cover due to shaking, which could lead to inaccurate testing. After the test is completed, the air volume cover can be removed by turning the vent valve 15 to proceed to the next air outlet point for testing.

[0021] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An airflow hood, comprising a hood body (1) and a base (2), characterized in that: The upper surface of the cover (1) is connected to an adsorption plate (10), the right side of the adsorption plate (10) is connected to an exhaust pipe (8), the right side of the base (2) is connected to a bellows (16), the right side of the bellows (16) is connected to a negative pressure fan (17), the right side of the negative pressure fan (17) is connected to a motor (18), the upper surface of the negative pressure fan (17) is connected to a connecting pipe (7), the end of the connecting pipe (7) away from the negative pressure fan (17) is connected to the end of the exhaust pipe (8), and the front of the bellows (16) is connected to an exhaust valve (15).

2. The airflow hood according to claim 1, characterized in that: The inner wall of the cover (1) is connected to a support plate (13), the upper surface of the support plate (13) is fitted with an adjustment plate (9), and the upper surface of the support plate (13) is connected to a set of clamping blocks (11).

3. The airflow hood according to claim 1, characterized in that: The base (2) is connected to a control panel (3) on its front side, and a power reserve is provided inside the base (2).

4. The airflow hood according to claim 1, characterized in that: The inner wall of the cover (1) is connected to a wind pressure sensor (14), and the bottom surface of the wind pressure sensor (14) is connected to a transmission line (12).

5. The airflow hood according to claim 1, characterized in that: The base (2) has a telescopic rod (6) threadedly connected to its bottom surface. The telescopic rod (6) has a sleeve (5) slidably connected to its outer surface. The sleeve (5) has a handle (4) connected to its bottom surface.

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