A return air device and return air system

Abstract

This application relates to the field of ventilation and discloses a return air device and system. The return air device includes a return air duct and a valve. The return air duct has a cavity, and the valve is located along the path of the return air duct. The valve controls the size of the cross-section of the cavity. A return air chamber is located at the end of the cavity opposite to the valve. The return air chamber is horizontally positioned, and a return air inlet is located at the end of the return air chamber opposite to the valve. A base plate is located at the bottom of the return air chamber, and the return air inlet is horizontally positioned. The distance between the base plate of the return air inlet and the ground is predetermined. This application maintains a predetermined height between the base plate of the return air chamber and the ground, forming a physical isolation between the return air inlet and the ground. This effectively prevents dust, particulate matter, and moisture condensation pollutants from the ground from accumulating at the bottom of the return air inlet, avoiding contamination of the return air inlet by pollutants, thus preventing the return air efficiency from being affected and preventing mold growth that pollutes the circulating air.

Description

Technical Field

[0001] This application relates to the field of ventilation, and more particularly to a return air device and return air system. Background Technology

[0002] In ventilation systems of cleanrooms and similar environments, the design of the return air structure directly affects the air quality and maintenance efficiency. Traditional return air systems often use floor-mounted return air vents, which are directly in contact with or adjacent to the ground. This design makes it easy for dust, particulate matter, and moisture condensation to accumulate at the bottom of the vents. Over long-term operation, these contaminants not only clog the vents, affecting return air efficiency, but can also breed mold, pollute the circulating air, and compromise the hygiene standards of the clean environment. Furthermore, due to the lack of effective isolation between the return air vents and the ground, cleaning personnel find it difficult to thoroughly clean the hidden areas beneath the vents, creating unsanitary corners that further exacerbate air quality deterioration and increase system maintenance difficulty. Utility Model Content

[0003] In view of this, the purpose of this application is to overcome the shortcomings of the prior art and provide a return air device and return air system.

[0004] To achieve the above objectives, the technical solution adopted in this application is as follows:

[0005] This application provides:

[0006] A return air device, comprising:

[0007] Return air duct, wherein the return air duct has a cavity;

[0008] A valve is provided on the path of the return air duct. The valve is used to control the size of the cross-section of the duct cavity. The end of the duct cavity away from the valve has a return air cavity. The return air cavity is horizontally arranged. The end of the return air cavity away from the valve has a return air inlet. The bottom of the return air cavity has a base plate. The return air inlet is horizontally arranged. The distance between the base plate and the ground is a preset height.

[0009] Furthermore, the return air duct includes an exhaust section and a transition section, the exhaust section is connected to the transition section, the end of the transition section away from the exhaust section is provided with a return air section, the return air section has the return air cavity, and the valve is provided on the exhaust section or the transition section.

[0010] Furthermore, the corners between the exhaust section and the transition section, as well as the corners between the transition section and the return air section, are all curved transitions.

[0011] Furthermore, a guide vane is provided at the corner between the exhaust section and the transition section and / or at the corner between the transition section and the return air section.

[0012] Furthermore, the exhaust section has an air inlet cavity, the transition section has a transition cavity, and the air inlet cavity and the transition cavity are connected to form the duct.

[0013] Furthermore, a protective layer is provided on the outer circumference of the return air duct.

[0014] Furthermore, a filter element is provided at the return air vent. The filter element is detachably installed in the return air section. The filter element includes a mounting plate and a filter screen, and the filter screen is disposed on the side of the mounting plate facing the return air section.

[0015] Furthermore, the mounting plate is provided with air distribution holes that penetrate through it.

[0016] This application also provides a return air system, including:

[0017] The return air device described in any one of the above statements;

[0018] A blower, the blower having an air inlet end and an air outlet end, the air outlet end being connected to an air outlet duct;

[0019] At least one cleanroom and at least one dusty room, both of which are connected to the air supply duct, and the cleanroom is connected to the air inlet of the blower through the return air device.

[0020] Furthermore, the dust chamber is connected to an exhaust duct.

[0021] This application maintains a preset height between the bottom plate of the return air chamber and the ground, forming a physical isolation between the return air vent and the ground. This effectively prevents dust, particulate matter, and moisture condensation pollutants from the ground from accumulating at the bottom of the return air vent, avoiding pollutants clogging the return air vent, affecting return air efficiency, and preventing mold growth that contaminates the circulating air. At the same time, this height setting causes pollutants to accumulate on the surface of the bottom plate rather than in hidden areas on the ground, making it easier to clean the bottom plate directly, thoroughly eliminating sanitary dead corners, thereby ensuring air cleanliness and reducing the difficulty of system maintenance.

[0022] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 A schematic diagram of the overall structure of the return air device of this application is shown;

[0025] Figure 2 A schematic diagram of the filter structure of this application is shown;

[0026] Figure 3 A schematic diagram of the mounting plate structure of this application is shown;

[0027] Figure 4 A schematic diagram of the return air system of this application is shown.

[0028] Explanation of key component symbols:

[0029] 100-Return air duct; 101-Pipe cavity; 1011-Air inlet cavity; 1012-Transition cavity; 102-Return air outlet; 110-Exhaust section; 120-Transition section; 130-Return air section; 131-Base plate; 200-Valve; 300-Protective layer; 400-Filter element; 410-Mounting plate; 411-Air distribution hole; 420-Filter screen; 500-Blower plate; 600-Blower fan; 610-Blower duct; 710-Cleanroom; 720-Dust-containing room; 721-Exhaust duct; a-Floor; b-Wall. Detailed Implementation

[0030] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0031] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application 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, and therefore should not be construed as a limitation of this application.

[0032] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0033] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0034] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0035] This application provides a return air device, which includes a return air duct 100 and a valve 200. Specifically, the return air duct 100 has a cavity 101, and the valve 200 is disposed on the path of the return air duct 100. The valve 200 is used to control the size of the connecting cross section of the cavity 101. The end of the cavity 101 away from the valve 200 has a return air chamber, which is arranged horizontally. The end of the return air chamber away from the valve 200 has a return air inlet 102. The bottom of the return air chamber has a base plate 131, and the distance between the base plate 131 and the ground is a preset height.

[0036] Please see Figure 1 As shown, the return air inlet 102 of the return air chamber is positioned at a certain height above the ground. A base plate 131 is installed on the inner bottom wall of the return air chamber, and the base plate 131 is at a certain height above the ground. This ensures that the return air inlet 102 is not in direct contact with the ground, thus preventing the generation of dust or mold and ensuring the cleanliness of the air in the workspace. It can be understood that, since it is not in direct contact with the ground, dust on the bottom surface is not easy to enter the return air inlet 102 during return air operation, which ensures the cleanliness of the return air inlet 102 to a certain extent. Furthermore, since the interior of the return air chamber is isolated from the ground by the base plate 131, when dust enters the return air inlet 102, the dust will fall onto the base plate 131 and will not fall onto the ground below the return air chamber. When cleaning the return air inlet 102, only the base plate 131 needs to be swept to complete the cleaning, which is convenient.

[0037] In some embodiments, the height H between the return air vent 102 and the ground a should be between 15 cm and 25 cm. The specific value can be adapted to the workspace. In this embodiment, the height between the return air vent 102 and the ground is 15 cm. It can be understood that since the return air vent 102 is at a certain height from the ground, the bottom surface below the return air vent 102 can be thoroughly cleaned during cleaning.

[0038] Please continue reading. Figure 1 As shown, the size of the air discharged from the return air vent 102 is adjusted by the valve 200, thereby enabling precise control of the air volume required by each workspace and meeting the air volume requirements of different workspaces according to their different working conditions.

[0039] In this embodiment, the return air duct 100 is made of sheet metal, stainless steel, or galvanized sheet, which ensures its internal smoothness, reduces wind resistance, and improves air supply efficiency.

[0040] In this embodiment, the return air duct 100 has a rectangular cross-section. In other embodiments, the return air duct 100 may also have a circular cross-section. The specific shape of the return air duct 100 is not limited here.

[0041] In some embodiments, the return air duct 100 includes an exhaust section 110 and a transition section 120. The exhaust section 110 is connected to the transition section 120. A return air section 130 is provided at the end of the transition section 120 away from the exhaust section 110. A return air inlet 102 is provided in the return air section 130. A valve 200 is provided on the exhaust section 110 or the transition section 120.

[0042] See Figure 1 As shown, the return air duct 100 mainly consists of three sections: an exhaust section 110 connected to the gas source, a transition section 120 for gas transmission, and a return air section 130 for gas exhaust. It is understood that the exhaust section 110, transition section 120, and return air section 130 can be connected by welding to ensure no gaps at the connection points, preventing gas from leaking out. Furthermore, the return air section 130 is a certain distance from the ground, thus meeting the height requirement of the return air inlet 102 from the ground. It is understood that because the return air section 130 is at a certain height from the ground, the bottom surface below the return air section 130 can be completely cleaned during cleaning.

[0043] Furthermore, the transition section 120 is fixedly installed on the wall b of the workspace, the exhaust section 110 is installed on the ceiling of the workspace, that is, the exhaust section 110 is installed horizontally, the transition section 120 is installed vertically, and the return air section 130 is installed horizontally.

[0044] In order to control the flow rate of gas flowing through the cavity 101, a valve 200 is provided on the exhaust section 110 or the transition section 120, or a valve 200 is provided on both the exhaust section 110 and the transition section 120. In this embodiment, the valve 200 is provided on the exhaust section 110 to control the opening and closing of the entire cavity 101.

[0045] For example, valve 200 can be a manual mechanical valve or an electric valve. The specific type of valve 200 is not limited here. As long as the valve or component can control the opening and closing of the cavity 101, it is within the protection scope of this application.

[0046] In some embodiments, the exhaust section 110 has an air inlet cavity 1011, the transition section 120 has a transition cavity 1012, and the air inlet cavity 1011 and the transition cavity 1012 are connected to form a cavity 101.

[0047] The air inlet chamber 1011 inside the exhaust section 110 is connected to the transition chamber 1012 inside the transition section 120 to form a pipe 101. The return air section 130 also has a corresponding channel, which is connected to the transition chamber 1012 and the air inlet chamber 1011 in sequence to form a pipe 101, thereby realizing the transportation of gas.

[0048] In some embodiments, the corners between the exhaust section 110 and the transition section 120, as well as the corners between the transition section 120 and the return air section 130, are all curved transitions.

[0049] like Figure 1 As shown, an arc transition is made at the connection between the exhaust section 110 and the transition section 120, and an arc transition is also made at the connection between the transition section 120 and the return air section 130. In this embodiment, an arc transition is used at all bends. The arc transition reduces the resistance of the gas at the bend, making the entire channel streamlined, thereby reducing the resistance of the gas during the transportation process, improving the transportation efficiency and reducing energy consumption.

[0050] In some embodiments, a baffle plate 500 is provided at the corner of the exhaust section 110 and the transition section 120 and / or at the corner of the transition section 120 and the return air section 130.

[0051] Please continue reading. Figure 1 As shown, the airflow will rush towards the outer wall of the pipe due to inertia at the bend, thus forming a low-pressure area and vortex on the inner wall, which will generate greater resistance. To address this, multiple spaced guide plates 500 can be installed at the bend to divide the airflow into several parts, thereby reducing the resistance and noise during the airflow transportation process and better protecting the pipeline.

[0052] In this embodiment, multiple guide vanes 500 can be installed at the corners of the exhaust section 110 and the transition section 120, as well as at the corners connecting the transition section 120 and the return air section 130, in order to reduce airflow resistance and vortex phenomena and improve gas delivery efficiency.

[0053] In some embodiments, a protective layer 300 is provided on the outer periphery of the return air duct 100.

[0054] To ensure that the entire return air duct 100 is not easily damaged during installation, a protective layer 300 is installed on its outer surface for protection. Furthermore, the protective layer 300 can also block the noise generated during airflow transportation, thereby reducing noise. Moreover, if the transported airflow is cold or hot, the protective layer 300 can provide insulation to a certain extent during transportation, preventing the airflow temperature from exchanging heat with the outside air, which can reduce energy consumption.

[0055] For example, the protective layer 300 can be made of materials such as sponge or thermal insulation cotton.

[0056] In some embodiments, a filter element 400 is provided at the return air vent 102. The filter element 400 is detachably installed in the return air section 130. The filter element 400 includes a mounting plate 410 and a filter screen 420. The filter screen 420 is disposed on the side of the mounting plate 410 facing the return air section 130.

[0057] See Figure 2 As shown, by setting the filter 420 on the mounting plate 410, the gas delivered from the return air duct 100 to the work space is filtered to prevent dust and other particles from entering the work space. The filter 420 also reduces dust accumulation at the return air inlet 102 to a certain extent. When cleaning is required, the filter element 400 can be removed from the return air inlet 102 for cleaning.

[0058] For example, the filter 420 can be installed to the mounting plate 410 in a snap-fit ​​shape, and the mounting plate 410 can be installed on the return air section 130 by screw connection, thereby achieving a detachable connection.

[0059] The specific type of filter 420 is not limited here; it can be selected according to the actual working conditions. It can be understood that by filtering the air through filter 420, the cleanliness of the air is ensured to a certain extent, preventing external dust from entering the return air vent 102 and falling onto the base plate 131. If dust falls onto the base plate 131, it can be cleaned by opening the return air vent 102, or the dust can be transported back to the blower 600 with the airflow, ensuring the cleanliness of the reused air. If dust is transported to the blower 600 with the airflow, the air will be re-filtered by the filter system of the blower 600, thereby ensuring the cleanliness of the air.

[0060] In some embodiments, the mounting plate 410 is provided with a through-hole 411.

[0061] Please see Figure 3 As shown, in order to ensure that the airflow is evenly delivered from the working space to the return air duct 100, multiple air distribution holes 411 are evenly spaced on the mounting plate 410. The air is evenly delivered to the return air duct 100 through the air distribution holes 411 to achieve the effect of uniform flow.

[0062] See Figure 4 As shown, this embodiment also provides a return air system, which includes a return air device of any of the above, a blower 600, and at least one cleanroom 710 and at least one dusty room 720. The blower 600 has an air inlet end and an air outlet end, and the air outlet end is connected to the air outlet duct 610. Both the cleanroom 710 and the dusty room 720 are connected to the air outlet duct 610. The cleanroom 710 is connected to the air inlet end of the blower 600 through the return air device.

[0063] It should be noted that the cleanroom 710 mentioned here does not generate dust itself, while the dusty room 720 generates dust during the production process of this application. Therefore, the air in the cleanroom 710 can be reused, that is, the air in the cleanroom 710 is returned to the air inlet of the blower 600 through the return air device. The blower 600 itself uses its suction force to transport the air in the cleanroom 710 along the duct of the return air device, realizing the air recycling of the cleanroom 710. However, the air in the dusty room 720 cannot be reused because it is full of dust, and the air in the dusty room 720 needs to be discharged to the outside.

[0064] For this purpose, the dust chamber 720 is connected to an exhaust duct 721.

[0065] Air is exhausted from the dusty room 720 through the exhaust duct 721. To improve the air exhaust efficiency of the dusty room 720, a corresponding fan can be installed on the exhaust duct 721 to improve the exhaust efficiency. Fresh air is supplied to the clean room 710 and the dusty room 720 through the air supply duct 610.

[0066] For example, the blower 600 can be an air conditioning fan or other device or equipment used for airflow transportation. In order to ensure the cleanliness of the air entering the clean room 710 and the dusty room 720, the blower 600 should have a corresponding filtration system to achieve the effect of air filtration. The filtration system can be any component that can filter dust particles in the air, and the specific type is not limited here.

[0067] To prevent dust in the dusty room 720 from flowing back into the cleanroom 710, the gas flow rate in the exhaust duct 721 should be greater than the gas flow rate entering it. Furthermore, the opening size of the valve 200 can be controlled to regulate the gas flow rate from the supply duct 610 to the cleanroom 710, maintaining a positive pressure in the cleanroom 710 and a negative pressure in the dusty room 720. This prevents dust-laden air from the dusty room 720 from entering the cleanroom 710.

[0068] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0069] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A return air device, characterized in that, include: Return air duct (100), the return air duct (100) having a cavity (101); A valve (200) is provided on the path of the return air duct (100). The valve (200) is used to control the size of the cross section of the duct cavity (101). The end of the duct cavity (101) away from the valve (200) has a return air cavity. The return air cavity is arranged horizontally. The end of the return air cavity away from the valve (200) has a return air inlet (102). The bottom of the return air cavity has a base plate (131). The distance between the base plate (131) and the ground is a preset height.

2. The return air device of claim 1, wherein, The return air duct (100) includes an exhaust section (110) and a transition section (120). The exhaust section (110) is connected to the transition section (120). The end of the transition section (120) away from the exhaust section (110) is provided with a return air section (130). The return air section (130) has the return air cavity. The valve (200) is provided on the exhaust section (110) or the transition section (120).

3. The return air device of claim 2, wherein, The corners between the exhaust section (110) and the transition section (120) and between the transition section (120) and the return air section (130) are all curved.

4. The return air device of claim 2, wherein, A deflector plate (500) is provided at the corner of the exhaust section (110) and the transition section (120) and / or at the corner of the transition section (120) and the return air section (130).

5. The return air device of claim 2, wherein, The exhaust section (110) has an air inlet cavity (1011), and the transition section (120) has a transition cavity (1012). The air inlet cavity (1011) and the transition cavity (1012) are connected to form the cavity (101).

6. The return air device of claim 1, wherein, The outer circumference of the return air duct (100) is provided with a protective layer (300).

7. The return air device of claim 2, wherein, A filter element (400) is provided at the return air inlet (102). The filter element (400) is detachably installed on the return air section (130). The filter element (400) includes a mounting plate (410) and a filter screen (420). The filter screen (420) is located on the side of the mounting plate (410) facing the return air section (130).

8. The return air device of claim 7, wherein, The mounting plate (410) is provided with a through-hole (411).

9. A return air system characterized by, include: The return air device according to any one of claims 1 to 8; A blower (600) has an air inlet and an air outlet, the air outlet being connected to an air outlet duct (610). At least one cleanroom (710) and at least one dusty room (720), both of which are connected to the air supply duct (610), and the cleanroom (710) is connected to the air inlet of the blower (600) through the return air device.

10. The return air system of claim 9, wherein, The dust chamber (720) is connected to an exhaust duct (721).

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