An adjustable floor return air device

Abstract

The utility model discloses an adjustable ground return air device, include: return air frame unit for forming return air passage and support internal component, height adjusting unit sets up return air frame unit bottom for dynamic adjustment return air frame unit's height, make return air surface with terrace keep flush, pipeline connection unit with return air frame unit's lower extreme intercommunication for the butt joint external return air pipeline system, airflow processing unit is detachably located in return air frame unit, is used for filtering return air airflow.

Description

Technical Field

[0001] This utility model relates to the field of return air device technology, specifically to an adjustable ground return air device. Background Technology

[0002] In conventional vertical laminar flow areas, the return air is provided by a raised floor. The collection of return air from the raised floor is a major challenge, requiring civil engineering cooperation in the early construction design. It is obviously not appropriate for some pharmaceutical plants to complete the civil engineering construction before bidding for the cleanroom. Summary of the Invention

[0003] The purpose of this invention is to provide an adjustable ground return air device in order to solve the technical problems existing in the background art.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] An adjustable ground return air device includes:

[0006] Return air frame unit, used to form return air duct and support internal components;

[0007] A height adjustment unit is located at the bottom of the return air frame unit to dynamically adjust the height of the return air frame unit so that the return air surface is flush with the ground.

[0008] The duct connection unit connects to the lower end of the return air frame unit and is used to connect to the external return air duct system;

[0009] An airflow handling unit, detachably housed within the return air frame unit, is used to filter the return airflow.

[0010] In some embodiments, the return air frame unit includes a return air device frame, the lower end of which is provided with a vertically extending connecting pipe;

[0011] The pipe connection unit includes a flange, the connecting pipe is inserted into the flange and fixed by welding, and the flange is sealed to the external return air pipe.

[0012] In some embodiments, the height adjustment unit includes multiple adjustment devices symmetrically distributed at the bottom of the return air device frame.

[0013] In some embodiments, each regulating device includes:

[0014] An adjusting component with external threads penetrates the bottom wall of the return air device frame;

[0015] The locking element, which engages with the adjusting element via a thread, is used to fix the height position.

[0016] In some embodiments, the adjusting element is a bolt or stud, and the lifting height of the return air device frame is controlled by the depth of screwing in.

[0017] In some embodiments, the airflow handling unit includes a medium-efficiency filter and a return air mesh plate arranged from bottom to top, wherein:

[0018] The medium-efficiency filter is snapped into the mounting groove on the inner wall of the return air unit frame;

[0019] The return air mesh panel covers the top opening of the return air unit frame.

[0020] In some embodiments, the device is embedded in a floor slab through a slot, the size of which matches the outer contour of the return air frame unit.

[0021] The beneficial effects that an adjustable ground return air device disclosed in this application may bring include, but are not limited to:

[0022] Easy to install: It can be directly embedded in the floor slab without the need for pre-embedded structures;

[0023] Height self-adaptive: compensates for ±10mm civil engineering elevation error through adjustment device;

[0024] Airflow optimization: The combination of a medium-efficiency filter and a mesh plate ensures laminar flow uniformity;

[0025] Low maintenance costs: The modular design allows for quick disassembly and replacement of filter media. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of this utility model.

[0027] Figure 2 for Figure 1 AA section view;

[0028] Figure 3 for Figure 2 Enlarged view of part I in the image;

[0029] Figure 4 for Figure 1 Top view. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0031] Conversely, this application covers any substitutions, modifications, equivalent methods, and schemes made within the spirit and scope of this application as defined in the claims. Furthermore, to provide the public with a better understanding of this application, certain specific details are described in detail below. However, this application can be fully understood by those skilled in the art even without these detailed descriptions.

[0032] like Figure 1-4 As shown, an adjustable ground return air device is installed by embedding it in a groove in the floor slab. The groove size matches the outer contour of the return air frame unit. It is mainly designed for construction of small laminar flow areas. The device is installed by digging a groove in the floor slab and connecting the return air duct under the floor slab to return air.

[0033] The return air system has a built-in adjustment function to compensate for the inconsistency between the return air system and the floor caused by deviations in the dimensions of the civil engineering construction.

[0034] The device has the following structure, including:

[0035] A return air frame unit is used to form a return air channel and support internal components; the return air frame unit includes a return air device frame, the lower end of which is provided with a vertically extending connecting pipe.

[0036] A height adjustment unit, located at the bottom of the return air frame unit, is used to dynamically adjust the height of the return air frame unit to keep the return air surface flush with the ground. The height adjustment unit includes multiple adjustment devices symmetrically distributed at the bottom of the return air frame. Each adjustment device includes:

[0037] An adjusting component with external threads penetrates the bottom wall of the return air device frame;

[0038] The locking element, which engages with the adjusting element via a thread, is used to fix the height position.

[0039] The pipe connection unit is connected to the lower end of the return air frame unit and is used to connect to the external return air duct system; the pipe connection unit includes a flange, the connecting pipe is inserted into the flange and fixed by welding, and the flange is sealed to the external return air duct.

[0040] An airflow handling unit, detachably mounted within the return air frame unit, is used to filter the return airflow. The airflow handling unit includes a medium-efficiency filter and a return air mesh plate arranged from bottom to top, wherein:

[0041] The medium-efficiency filter is snapped into the mounting groove on the inner wall of the return air unit frame;

[0042] The return air mesh panel covers the top opening of the return air unit frame.

[0043] In some embodiments, the adjusting element is a bolt or stud, and the lifting height of the return air device frame is controlled by the depth of screwing in.

[0044] Combination Figure 1 Installation process and connection relationships of core components:

[0045] Floor slab pretreatment:

[0046] A rectangular slot is opened on the conventional civil engineering floor slab 1, and the size of the slot matches the outer contour of the return air device frame 2.

[0047] Frame and pipe connection:

[0048] Place the return air device frame 2 into the slot, and insert the lower end round pipe into the pipe flange 6;

[0049] Welding and fixing: The connection between the round pipe and flange 6 is fully welded around the circumference, and the lower end of flange 6 is bolted to the return air main pipe.

[0050] Height adjustment:

[0051] Four rotationally symmetrically distributed adjusting devices 5 (using M12 fine-thread bolts):

[0052] Screw in the bolts → Lift the return air device frame 2 until its top surface is flush with the ground;

[0053] The bolt position is fixed by tightening the lock nut, with an accuracy control of ±1mm.

[0054] Airflow handling unit installation:

[0055] The medium-efficiency filter 4 is installed from bottom to top and snapped into the L-shaped mounting groove on the inner wall of the return air device frame 2.

[0056] Cover the return air mesh panel 3 on the top of the frame and secure it with clips.

[0057] Technical effectiveness verification:

[0058] This invention features convenient installation and use, and low maintenance costs. Tests show that the device achieves a laminar flow area with wind speed uniformity of ±0.1 m / s in a 0.5 m² area, and the cleanliness meets the ISO Class 5 standard.

[0059] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An adjustable ground return air device, characterized in that, include: Return air frame unit, used to form return air duct and support internal components; A height adjustment unit is located at the bottom of the return air frame unit to dynamically adjust the height of the return air frame unit so that the return air surface is flush with the ground. The duct connection unit connects to the lower end of the return air frame unit and is used to connect to the external return air duct system; An airflow handling unit, detachably housed within the return air frame unit, is used to filter the return airflow.

2. The adjustable ground return air device according to claim 1, characterized in that: The return air frame unit includes a return air device frame (2), with a vertically extending connecting pipe at its lower end; The pipe connection unit includes a flange (6), the connecting pipe is inserted into the flange (6) and fixed by welding, and the flange (6) is sealed to the external return air pipe.

3. The adjustable ground return air device according to claim 2, characterized in that: The height adjustment unit includes multiple adjustment devices (5), which are symmetrically distributed at the bottom of the return air device frame (2).

4. The adjustable ground return air device according to claim 3, characterized in that: Each adjustment device (5) includes: An adjusting component with external threads penetrates the bottom wall of the return air device frame (2); The locking element, which engages with the adjusting element via a thread, is used to fix the height position.

5. The adjustable ground return air device according to claim 4, characterized in that: The adjusting component is a bolt or stud, and the lifting height of the return air device frame (2) is controlled by the depth of screwing in.

6. The adjustable ground return air device according to any one of claims 1-4, characterized in that: The airflow handling unit includes a medium-efficiency filter (4) and a return air mesh plate (3) arranged from bottom to top, wherein: The medium-efficiency filter (4) is snapped into the mounting groove on the inner wall of the return air device frame (2); The return air grid plate (3) covers the top opening of the return air device frame (2).

7. The adjustable ground return air device according to claim 1, characterized in that: The device is installed by embedding it in a slot in the floor slab, with the slot size matching the outer contour of the return air frame unit.

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