Size-adjustable air volume cover

Abstract

The utility model discloses a size-adjustable air volume cover, and belongs to the technical field of air volume detection devices. A size-adjustable air volume cover comprises a base, a pair of long edge strips and a pair of short edge strips are arranged at the upper end of the base, cavity structures are formed in the inner sides of the long edge strips and the inner sides of the short edge strips respectively, and adjusting battens penetrating through and extending to the outer sides of the cavity structures are installed on the inner sides of the cavity structures. A connecting base is installed at the end, located on the outer side of the cavity structure, of the adjusting batten, and a fixing piece for limiting and fixing the adjusting plate is arranged on the side wall of the cavity structure. According to the air volume cover, the adjustable long edge strip, the adjustable short edge strip and the telescopic adjusting batten are designed, so that the size of the cover body can be conveniently adjusted to adapt to air ports of different specifications; by means of the design, the number and types of air volume covers needing to be carried by detection personnel are greatly reduced, the detection cost is reduced, and meanwhile measurement errors caused by the fact that the sizes of the air openings are not matched are avoided.

Description

Technical Field

[0001] This utility model belongs to the technical field of air volume detection devices, and in particular relates to an adjustable air volume cover. Background Technology

[0002] In ventilation and air conditioning systems, the cool or warm air delivered by the air conditioner terminals is the primary basis for human perception of temperature. Taking summer as an example, when the indoor temperature has reached the set temperature and tends to stabilize, insufficient airflow will fail to meet comfort requirements, while excessive airflow will cause a strong feeling of cold draft and contradict energy-saving principles. Therefore, monitoring the airflow at the vents of ventilation and air conditioning systems is extremely important.

[0003] Traditional airflow hoods are typically designed based on fixed-size air outlets. When the size of the hood differs significantly from the outlet size, it can lead to substantial measurement errors. To ensure accuracy, the hood usually needs to completely cover the air outlet during measurement. This requires selecting an airflow hood with an area appropriate to the size and area of ​​the outlet being measured. However, in practice, due to the diverse and frequently changing specifications of HEPA filters, testing personnel must carry numerous airflow hoods and supports of different models to meet testing standards. This not only increases testing costs but also creates inconvenience during transportation and time-consuming and labor-intensive assembly and disassembly processes. Summary of the Invention

[0004] The purpose of this invention is to address the problems existing in the prior art by providing a size-adjustable airflow hood.

[0005] To achieve the above objectives, the utility model employs the following technical solution: an adjustable airflow hood includes a base, the upper end of which is provided with a pair of long side strips and a pair of short side strips. A cavity structure is respectively formed on the inner side of the pair of long side strips and the pair of short side strips. An adjusting plate strip is installed on the inner side of the cavity structure, penetrating and extending to the outer side of the cavity structure. A connecting seat is installed at one end of the adjusting plate strip located on the outer side of the cavity structure. A fixing member is provided on the side wall of the cavity structure to limit and fix the adjusting plate. A shielding cloth cover is respectively installed at the lower ends of the pair of long side strips and the pair of short side strips. The other end of the shielding cloth cover is connected to the base. A connecting cloth cover is installed at the lower end of the connecting seat, and one side of the connecting cloth cover is connected to the shielding cloth cover.

[0006] By adopting the above technical solution, the base serves as the supporting structure for the entire airflow hood. The long and short side strips at its upper end form the basis of an adjustable frame. The cavity structure provides space for the installation and adjustment of the adjustment strips, allowing the size of the airflow hood to be adjusted according to the size of different air outlets. This design improves the adaptability and flexibility of the airflow hood, making it suitable for various sizes of air outlets.

[0007] Optionally, the base is cylindrical, and two pairs of reinforcing rods are installed at the upper end of the base. The two pairs of reinforcing rods are symmetrically distributed, and the other ends of the two pairs of reinforcing rods are respectively installed in the middle position of a pair of long side strips and a pair of short side strips.

[0008] By adopting the above technical solution, the two pairs of reinforcing rods installed on the cylindrical base not only enhance the structural strength of the airflow hood, but also provide additional support points, making the long and short side strips more stable during adjustment. This design helps to improve the stability and accuracy of the airflow hood during measurement.

[0009] Optionally, the sidewall of the cavity structure is provided with perforations for the adjustment strip to pass through.

[0010] By adopting the above technical solution, the perforations on the sidewall of the cavity structure provide a channel for the adjustment strip to pass through, allowing the adjustment strip to move smoothly along the cavity structure. This design simplifies the installation and adjustment process of the adjustment strip and improves the convenience of operation.

[0011] Optionally, the connecting seat has a mating groove at one end near the adjusting plate for mounting the adjusting plate, the surface of the adjusting plate has a fixing hole, and a fixing bolt is installed on the mating groove to lock with the fixing hole.

[0012] By adopting the above technical solution, by opening a docking groove on the connecting seat and a fixing hole on the adjusting plate, and then using fixing bolts for docking and locking, the stability of the adjusting plate after adjustment is ensured. This fixing method is not only simple and easy to implement, but also provides reliable connection strength, ensuring the accuracy of the air volume hood during the measurement process.

[0013] Optionally, the fastener includes a threaded hole formed in the side wall of the cavity structure, and a fastening bolt is provided on the inner side of the threaded hole.

[0014] By employing the above technical solution, the adjusting strip can be further fixed and adjusted through the combination of threaded holes and fastening bolts. This design provides additional stability and allows users to make fine adjustments as needed.

[0015] Optionally, the fixing member includes a movable hole formed in the side wall of the cavity structure, a locking post provided inside the movable hole, a return spring provided between the locking post and the long side strip and the short side strip, and a plurality of locking holes that mate with the locking post formed in the side wall of the adjusting plate strip.

[0016] By adopting the above technical solution, another fastener design achieves quick locking and releasing of the adjusting slats through the use of movable holes, locking posts, and return springs. This design not only improves operational convenience but also allows users to quickly adjust the size of the airflow hood when needed.

[0017] Optionally, the connecting fabric cover is corrugated, the upper end of the connecting fabric cover is provided with a slider, and the upper part of the adjusting plate is provided with a groove for the slider to move.

[0018] By adopting the above technical solution, the corrugated connecting cloth cover design not only increases the flexibility and adaptability of the airflow cover, but also makes the airflow cover more flexible in adjusting its size; at the same time, a slider and a groove are set between the connecting cloth cover and the adjusting strip, so that the adjustment of the connecting cloth cover is more flexible.

[0019] Compared with the prior art, the beneficial effects of this utility model are:

[0020] 1. This airflow hood, with its adjustable long and short side strips and retractable adjustment plates, allows for easy adjustment of the hood's size to accommodate air outlets of different specifications. This design significantly reduces the number and types of airflow hoods that testing personnel need to carry, lowers testing costs, and avoids measurement errors caused by mismatched air outlet sizes.

[0021] 2. The adjusting strips achieve quick and stable adjustment and fixation via connecting seats and fasteners, making operation simple and fast. Testing personnel only need to adjust the position of the adjusting strips according to the size of the air outlet to be tested and lock it using the fasteners to complete the adaptation of the airflow hood. This process greatly saves time on disassembly, assembly, and debugging, improving testing efficiency.

[0022] 3. Because the size of the airflow hood is adjustable, testing personnel do not need to carry a large number of different models of airflow hoods and supports. This not only reduces the burden of carrying and transporting, but also saves storage space. At the same time, the corrugated connecting fabric cover design makes the airflow hood more flexible and convenient to adjust and store. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of the airflow cover of this utility model;

[0024] Figure 2 This is a schematic diagram of the connection structure between the cavity structure and the adjusting strip cross section of this utility model;

[0025] Figure 3 This utility model Figure 1 Enlarged structural diagram at point A in the middle.

[0026] In the diagram: 1. Base; 101. Rib; 2. Long side strip; 3. Short side strip; 4. Cavity structure; 401. Perforation; 5. Adjusting strip; 501. Fixing hole; 502. Slide groove; 6. Connecting seat; 601. Butt groove; 602. Fixing bolt; 7. Fastening bolt; 8. Covering cloth cover; 9. Connecting cloth cover; 901. Sliding block. Detailed Implementation

[0027] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0028] In the description of this utility model, it should be noted that the terms "middle", "upper", "lower", "left", "right", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0029] like Figure 1 As shown in Figure 3, the specific solution of the embodiment is as follows: An adjustable airflow hood includes a base 1, which is cylindrical and provides a stable support foundation to ensure that the airflow hood will not tip over or deform during use. Two pairs of reinforcing rods 101 are installed at the upper end of the base 1. The two pairs of reinforcing rods 101 are symmetrically distributed. The reinforcing rods 101 are made of flexible material. The reinforcing rods 101 serve as a bridge connecting the long side strip 2 and the short side strip 3, enhancing the overall structural strength of the airflow hood and ensuring that the airflow hood remains balanced and stable when adjusting its size. At the same time, the reinforcing rods 101 have a certain degree of elasticity and flexibility, which can adapt to the adjustment requirements of different sizes and will not be damaged due to excessive bending.

[0030] The upper end of the base 1 is provided with a pair of long side strips 2 and a pair of short side strips 3. The long side strips 2 and short side strips 3 together form the main frame of the airflow hood, providing a foundation for the installation and adjustment of the adjusting strips 5. The other ends of the two pairs of reinforcing rods 101 are respectively installed in the middle position of the pair of long side strips 2 and the pair of short side strips 3. The inner sides of the pair of long side strips 2 and the pair of short side strips 3 are respectively provided with cavity structures 4. The design of the cavity structure 4 provides installation space for the adjusting strips 5 within the cavity structure 4 and allows the adjusting strips 5 to move freely within the cavity to adjust the size of the airflow hood.

[0031] The cavity structure 4 has a through hole 401 on its side wall for the adjustment strip 5 to pass through. An adjustment strip 5 is installed on the inner side of the cavity structure 4, extending through and to the outer side of the cavity structure 4. The design of the through hole 401 allows the adjustment strip 5 to move freely within the cavity, thereby adjusting the size of the airflow hood to adapt to the size of different air outlets. A connecting seat 6 is installed at one end of the adjustment strip 5 on the outer side of the cavity structure 4. A docking groove 601 is provided at the end of the connecting seat 6 near the adjustment strip 5 for the adjustment strip 5 to be installed. A fixing hole 501 is provided on the surface of the adjustment strip 5. A fixing bolt 602 is installed on the docking groove 601 to lock with the fixing hole 501. The connecting seat 6 is tightly connected to the adjustment strip 5 through the docking groove 601 and locked by the fixing bolt 602 to ensure the stability of the adjustment strip 5 after adjustment.

[0032] The side wall of the cavity structure 4 is provided with a fixing member for limiting and fixing the adjusting plate. The fixing member includes a threaded hole opened in the side wall of the cavity structure 4, and a fastening bolt 7 is provided on the inner side of the threaded hole, which provides a simple and effective fixing method. The adjusting plate strip 5 can be fixed in the required position by tightening the fastening bolt 7.

[0033] In some embodiments, the fastener includes a movable hole formed in the side wall of the cavity structure 4, a locking post provided inside the movable hole, a return spring provided between the locking post and the long side strip 2 and the short side strip 3, and a plurality of locking holes that mate with the locking post formed in the side wall of the adjusting plate 5. In another fixing method, the locking post mates with the locking holes on the adjusting plate 5 and remains locked under the action of the return spring, thereby achieving fast and stable fixing.

[0034] The lower ends of the pair of long side strips 2 and the pair of short side strips 3 are respectively equipped with shielding cloth covers 8. The other end of the shielding cloth cover 8 is connected to the base 1. The shielding cloth cover 8 covers the lower ends of the long side strips 2 and the short side strips 3 and is connected to the base 1, which plays a role in sealing and shielding, preventing air leakage during use. The lower end of the connecting seat 6 is equipped with a connecting cloth cover 9. One side of the connecting cloth cover 9 is connected to the shielding cloth cover 8. The connecting cloth cover 9 is corrugated. The upper end of the connecting cloth cover 9 is provided with a slider 901. The upper part of the adjusting plate 5 is provided with a sliding groove 502 for the slider 901 to move. The design of the slider and the sliding groove ensures the stability and sealing of the air volume cover after size adjustment. One side of the connecting cloth cover 9 is connected to the shielding cloth cover 8, forming a complete sealing structure, which further improves the sealing performance of the air volume cover.

[0035] The dimensions of the airflow hood are between 610mm×610mm and 1220mm×1220mm. The three common sizes are 610mm×610mm, 610mm×1220mm, and 1220mm×1220mm. When none of the adjusting plates 5 on the pair of long side strips 2 and the pair of short side strips 3 extend to the outside of the cavity structure 4, the size of the airflow hood is 610mm×610mm. When only the adjusting plates 5 on the pair of short side strips 3 or the pair of long side strips 2 are opened, the size of the airflow hood is 610mm×1220mm. When all the adjusting plates 5 on the pair of long side strips 2 and the pair of short side strips 3 extend to the outside of the cavity structure 4, the size of the airflow hood is 1220mm×1220mm.

[0036] 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. A size-adjustable airflow hood, including a base, characterized in that, The upper end of the base is provided with a pair of long side strips and a pair of short side strips. The inner sides of the pair of long side strips and the pair of short side strips are respectively provided with cavity structures. An adjusting plate strip is installed on the inner side of the cavity structure and extends through to the outer side of the cavity structure. A connecting seat is installed at one end of the adjusting plate strip on the outer side of the cavity structure. The side wall of the cavity structure is provided with a fixing member for limiting and fixing the adjusting plate. A shielding cloth cover is installed at the lower end of the pair of long side strips and the pair of short side strips respectively. The other end of the shielding cloth cover is connected to the base. A connecting cloth cover is installed at the lower end of the connecting seat. One side of the connecting cloth cover is connected to the shielding cloth cover.

2. The adjustable airflow hood according to claim 1, characterized in that: The base is cylindrical, and two pairs of reinforcing rods are installed at the upper end of the base. The two pairs of reinforcing rods are symmetrically distributed, and the other ends of the two pairs of reinforcing rods are respectively installed in the middle position of a pair of long side strips and a pair of short side strips.

3. The adjustable airflow hood according to claim 1, characterized in that: The cavity structure has perforations on its sidewalls for the adjustment strips to pass through.

4. The adjustable airflow hood according to claim 1, characterized in that: The connecting seat has a mating groove at one end near the adjusting plate for mounting the adjusting plate. The surface of the adjusting plate has a fixing hole, and a fixing bolt that mates with and locks into the fixing hole is installed on the mating groove.

5. The adjustable airflow hood according to claim 1, characterized in that: The fastener includes a threaded hole formed in the side wall of the cavity structure, and a fastening bolt is provided on the inner side of the threaded hole.

6. The adjustable airflow hood according to claim 1, characterized in that: The fastener includes a movable hole formed in the side wall of the cavity structure, a locking post provided inside the movable hole, a return spring provided between the locking post and the long side strip and the short side strip, and a plurality of locking holes that mate with the locking post formed in the side wall of the adjusting plate strip.

7. The adjustable airflow hood according to claim 1, characterized in that: The connecting fabric cover is corrugated, and a slider is provided at the upper end of the connecting fabric cover. A groove is provided on the upper part of the adjusting plate for the slider to move.

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