A detachable noise reduction device and charging pile

Abstract

The utility model relates to charging pile noise reduction technical field, concretely relates to a detachable noise reduction device and charging pile. The noise reduction device includes the casing, is used for the hanger of detachable connection with charging pile, and multiple sound absorption components that set up sound absorption material. The casing includes the bottom plate, two first side plates connected with the two opposite side edges of bottom plate respectively, and two second side plates connected with the other two opposite side edges of bottom plate respectively, is equipped with multiple first air holes on the bottom plate, and the first side plate and second side plate are connected with each other. The hanger is detachably installed at the end of the first side plate away from the bottom plate, and the two ends of the sound absorption component are detachably connected with two opposite second side plates respectively, and the sound absorption component is inclined to the plane where the bottom plate is located. Through the assembly cooperation of casing, hanger and sound absorption component, the detachable cooperation of noise reduction device and charging pile is realized, and the technical problems of poor applicability and inconvenient maintenance and modification of the existing charging pile noise reduction scheme are solved.

Description

Technical Field

[0001] This utility model relates to the field of noise reduction technology for charging piles, specifically to a detachable noise reduction device and a charging pile. Background Technology

[0002] With the continuous improvement and development of my country's new energy policies, new energy vehicles have become widespread in people's daily lives, serving as a low-cost mode of transportation. Charging stations, as a crucial supporting infrastructure for electric vehicles, have significant social and economic benefits. As market demand for charging stations continues to grow, large-scale construction of charging stations has begun in shopping malls, towns, and residential communities.

[0003] Although charging stations are designed with noise control in mind according to national standards during the design phase, in actual application scenarios, due to limitations in site construction planning, charging stations are often placed too close to residential buildings. In such cases, the noise generated by the operation of the internal modules and the cooling fans of the charging station can significantly disturb the lives of nearby residents.

[0004] Traditional noise reduction solutions for charging stations primarily rely on fixed noise reduction structures installed inside the cabinet. This built-in approach has significant limitations: firstly, its noise reduction effectiveness is constrained by the cabinet's internal space, making it difficult to adjust flexibly to meet specific needs; secondly, this fixed structure cannot adapt to different installation environments, especially when additional noise reduction measures are required, as it is neither easy to install nor maintain without damaging the existing structure. Furthermore, current technology lacks specific noise reduction solutions for the charging cabinet's air inlet and outlet, failing to effectively control the propagation of airflow noise. Therefore, improvements to existing technologies are urgently needed to address these issues. Utility Model Content

[0005] The purpose of this utility model is to overcome the shortcomings of the prior art and provide a detachable noise reduction device and charging pile, which solves the technical problems of poor applicability and inconvenience of maintenance and modification of existing charging pile noise reduction solutions.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: This utility model provides a detachable noise reduction device, including a housing, a bracket for detachable connection to a charging pile, and multiple sound-absorbing components with sound-absorbing material. The housing includes a base plate, two first side plates connected to two opposite sides of the base plate, and two second side plates connected to the other two opposite sides of the base plate. The base plate has multiple first ventilation holes, and the first and second side plates are interconnected. The bracket is detachably mounted on the end of the first side plate away from the base plate. Both ends of each sound-absorbing component are detachably connected to the two opposite second side plates, and the sound-absorbing components are inclined relative to the plane of the base plate.

[0007] In one possible implementation, the sound-absorbing assembly includes a fixed plate, a mounting plate detachably connected to the second side plate, and a sound-absorbing material. The mounting plate surrounds a mounting cavity, the sound-absorbing material is installed in the mounting cavity, the sound-absorbing material is correspondingly disposed with respect to the first vent hole, the fixed plate covers the sound-absorbing material, and one end of the fixed plate is detachably connected to the mounting plate.

[0008] In one possible implementation, the mounting plate has baffles on its edge, and at least three baffles are flanged. A first connecting portion extends from one side of the mounting plate, and the mounting plate is detachably connected to the fixing plate through the first connecting portion.

[0009] In one possible implementation, one end of the fixing plate is provided with a bent portion, and the side portion of the fixing plate is provided with a flange structure.

[0010] In one possible implementation, the mounting bracket is provided with a second connecting part that is detachably connected to the charging pile, and the second connecting part is a flanged structure.

[0011] In one possible implementation, at least one of the first side plates has a plurality of second ventilation holes.

[0012] This utility model also provides a charging pile, including a charging pile body, a first cabinet door and a second cabinet door disposed opposite to each other on the charging pile body, and the aforementioned noise reduction device. The first cabinet door has an air inlet, and the second cabinet door has an air outlet. The noise reduction device is hung on the door edge of the first cabinet door and / or the second cabinet door via a bracket, and the noise reduction device completely covers the air inlet and / or the air outlet.

[0013] The beneficial effects of this utility model are as follows: Compared with the prior art, this utility model achieves a detachable connection between the noise reduction device and the charging pile through the assembly and cooperation of the shell, the hanging parts, and the sound-absorbing components. Among them, the sound-absorbing components optimize the sound wave absorption path through the tilt angle, the buckle structure of the hanging bracket and the snap-fit ​​method of the door edge avoid affecting the waterproof and dustproof performance of the cabinet, and the corresponding layout of the ventilation holes on the bottom plate and the sound-absorbing material takes into account both noise reduction and ventilation needs. The detachable connection of the sound-absorbing components and the hanging parts facilitates subsequent modification and maintenance, so that the noise reduction device can adapt to different charging pile installation environments, has good applicability, and is easy to maintain and modify. It solves the technical problems of poor applicability and inconvenience of maintenance and modification of existing charging pile noise reduction solutions. Attached Figure Description

[0014] Figure 1 This is a structural schematic diagram of a noise reduction device provided by this utility model.

[0015] Figure 2 A schematic diagram of the structure of a shell provided by this utility model.

[0016] Figure 3 A schematic diagram of the structure of an mounting plate provided for utility model.

[0017] Figure 4 This is a structural schematic diagram of a fixing plate provided by the present invention.

[0018] Figure 5 This is a schematic diagram of the structure of a charging pile provided by this utility model.

[0019] Attached image labels: 1. Noise reduction device; 11. Housing; 111. Base plate; 1111. First vent; 112. First side plate; 1121. Second vent; 113. Second side plate; 12. Hanger; 121. Second connecting part; 13. Sound absorption component; 131. Fixing plate; 1311. Bending part; 132. Mounting plate; 1321. Baffle; 1322. First connecting part; 133. Sound absorption material; 2. Charging pile; 21. Charging pile body. Detailed Implementation

[0020] To solve the above-mentioned technical problems, this utility model provides a detachable noise reduction device and a charging pile. The technical solution and embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0021] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "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 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. Therefore, they should not be construed as limitations on this application.

[0022] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation", "connection" and "joining" should be interpreted broadly, for example, they can refer to fixed connection, detachable connection, or integral connection; for those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0023] 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. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0024] In the process of widespread application of new energy charging piles, traditional noise reduction solutions, due to their fixed structural design, cannot be modularly disassembled and maintained. This structural defect necessitates the complete disassembly of the cabinet components during maintenance, significantly increasing downtime and labor costs.

[0025] If the above problems are not addressed, the operation and maintenance costs of charging piles will increase exponentially, and the coupling effect between noise reduction components and heat dissipation systems will cause equipment overheating and shutdown. Over long-term operation, the performance of sound-absorbing materials will degrade and cannot be replaced in a timely manner, resulting in continuously exceeding environmental noise standards, directly affecting the compliance of charging facility deployment planning, and creating the risk of user complaints.

[0026] like Figure 1 and Figure 2As shown, this utility model provides a detachable noise reduction device 1, including a housing 11, a bracket 12 for detachable connection with a charging pile 2, and multiple sound-absorbing components 13 provided with sound-absorbing material 133. The housing 11 includes a base plate 111, two first side plates 112 respectively connected to two opposite sides of the base plate 111, and two second side plates 113 respectively connected to the other two opposite sides of the base plate 111. The base plate 111 has multiple first ventilation holes 1111, and the first side plates 112 and second side plates 113 are connected to each other. The bracket 12 is detachably installed at the end of the first side plate 112 away from the base plate 111. The two ends of the sound-absorbing components 13 are detachably connected to the two opposite second side plates 113, and the sound-absorbing components 13 are inclined relative to the plane of the base plate 111.

[0027] The housing 11 refers to the outer frame used to accommodate the sound-absorbing component 13 and form an airflow channel. It can be made of metal or plastic materials. The base plate 111, the first side plate 112 and the second side plate 113 are fixedly connected by welding or bolts to ensure structural stability.

[0028] The first vent 1111 refers to the through hole opened on the base plate 111. Specifically, it can be arranged in a circular, triangular or polygonal pattern to balance the sound insulation effect of the noise reduction device 1 and the heat dissipation requirements of the charging pile 2.

[0029] The bracket 12 refers to the support component that connects to the door edge of the charging pile 2. Specifically, it can be a metal plate with a flange structure, which is fixed to the edge of the door frame of the charging pile 2 by snap-fit ​​or suspension, so as to achieve a non-destructive connection between the noise reduction device 1 and the charging pile 2.

[0030] The inclined setting of the sound-absorbing component 13 refers to the installation of the sound-absorbing material 133 at a non-perpendicular angle to the plane of the base plate 111. Any inclined angle within the range of less than 90° can be used, and the specific angle can be determined based on the actual noise reduction effect. The inclined setting of the sound-absorbing component 13 enhances the sound absorption effect by extending the sound wave reflection path, while avoiding obstruction of airflow through the ventilation holes.

[0031] The detachable connection of the two ends of the sound-absorbing component 13 means that it is fixed to the second side plate 113 by bolts or slots. Specifically, a guide rail or slot can be set on the inner side of the second side plate 113 so that the sound-absorbing component 13 can be slidably installed or removed in a specific direction, which facilitates the replacement of the sound-absorbing material 133.

[0032] The housing 11 structure forms a stable frame through the connection of the base plate 111 and the side plates, providing support for the sound-absorbing component 13. The first vent 1111 ensures unobstructed airflow and also provides a propagation path for sound waves. The detachable design of the bracket 12 allows the entire device to be easily installed on the charging pile 2 without damaging the original structure of the charging pile 2.

[0033] The tilted arrangement of the sound-absorbing component 13 optimizes the sound wave absorption path, increases the contact area and time between the sound waves and the sound-absorbing material 133, thereby improving the noise reduction effect. At the same time, the tilted arrangement can also form a gradual airflow channel, reducing airflow resistance and ensuring heat dissipation.

[0034] The arrangement of multiple sound-absorbing components 13 increases the overall sound-absorbing area, enabling more effective absorption of noise at different frequencies. The detachable connection design between the sound-absorbing components 13 and the second side plate 113 facilitates maintenance and replacement of the sound-absorbing material 133, improving the service life and maintenance efficiency of the device.

[0035] The core innovation of this application lies in the combination design of the modular shell 11 and the detachable bracket 12, along with the inclined sound-absorbing component 13, which achieves non-destructive installation while ensuring the heat dissipation requirements of the charging pile 2. The sound-absorbing component 13 optimizes the sound wave absorption path through its inclined angle, and the snap-fit ​​structure of the bracket 12 with the door edge avoids affecting the waterproof and dustproof performance of the cabinet. The corresponding layout of the first vent 1111 and the sound-absorbing material 133 takes into account both noise reduction and ventilation requirements, thereby overcoming the size limitations and maintenance difficulties of traditional fixed noise reduction devices 1.

[0036] The entire device operates as follows: the noise generated by the charging pile 2 enters the housing 11 through the first vent 1111, and the sound waves are reflected and absorbed on the surface of the inclined sound-absorbing component 13, thus gradually attenuating the energy. At the same time, the heat dissipation airflow can also circulate through the space between the first vent 1111 and the sound-absorbing component 13, ensuring the heat dissipation requirements of the charging pile 2.

[0037] See Figure 1 , Figure 3 and Figure 4 Furthermore, the sound-absorbing assembly 13 includes a fixing plate 131, a mounting plate 132 detachably connected to the second side plate 113, and a sound-absorbing material 133. The mounting plate 132 surrounds a mounting cavity, the sound-absorbing material 133 is installed in the mounting cavity, the sound-absorbing material 133 is correspondingly arranged with the first vent hole 1111, the fixing plate 131 covers the sound-absorbing material 133, and one end of the fixing plate 131 is detachably connected to the mounting plate 132.

[0038] It should be noted that the fixing plate 131 only covers a portion of the sound-absorbing material 133. Specifically, the fixing plate 131 completely covers the sound-absorbing material 133 in the long side direction and partially covers the sound-absorbing material 133 in the short side direction. This allows the fixing plate 131 to fix and constrain the sound-absorbing material 133 while reducing the negative impact of the noise reduction performance caused by the sound-absorbing material 133 being blocked.

[0039] Mounting plate 132 may be made of metal, such as aluminum alloy or stainless steel, to provide sufficient strength and durability. The mounting cavity may be designed as rectangular or other suitable shapes to accommodate sound-absorbing material 133. Sound-absorbing material 133 may be a high-efficiency sound-absorbing material such as polyurethane foam, glass wool, or rock wool. The detachable connection between fixing plate 131 and mounting plate 132 can be achieved through snap-fit, bolt, or magnetic connections, facilitating quick assembly, disassembly, and maintenance.

[0040] Specifically, the sound-absorbing material 133 is pre-cut to a size matching the mounting cavity and then placed inside the mounting cavity. The side wall baffle 1321 of the mounting cavity restricts the horizontal displacement of the material. The fixing plate 131 is detachably connected to the mounting plate 132 at one end to achieve quick opening and closing. When the fixing plate 131 is closed, its plate body is pressed against the surface of the sound-absorbing material 133, preventing the material from loosening in the vertical direction through physical constraint. The detachable connection between the mounting plate 132 and the second side plate 113 allows the entire sound-absorbing assembly 13 to be disassembled and reassembled as an independent module. During maintenance, only the connection between the mounting plate 132 and the second side plate 113 needs to be disconnected to remove the assembly without disassembling other structures of the housing 11. When airflow enters the housing 11 through the first vent 1111 of the bottom plate 111, the sound-absorbing material 133, due to its corresponding arrangement with the vent, can fully contact the sound wave energy in the airflow and convert the sound energy into heat energy through its porous structure. The combined structure of mounting plate 132 and fixing plate 131 fully constrains the sound-absorbing material 133 in three-dimensional space, ensuring its positional stability even under vibration conditions, thereby ensuring the durability of the noise reduction effect.

[0041] In one alternative embodiment, the fixing plate 131 completely covers the sound-absorbing material 133, and the fixing plate 131 has multiple holes so that sound waves can pass through the fixing plate 131 and be absorbed by the sound-absorbing material 133.

[0042] Specifically, the surface of the fixing plate 131 can be designed as a mesh or porous structure to allow sound waves to pass through and be absorbed by the sound-absorbing material 133.

[0043] like Figure 3 As shown, in one optional embodiment, the edge of the mounting plate 132 is provided with a baffle 1321, and at least three baffles 1321 are flanged structures. A first connecting part 1322 extends from one side of the mounting plate 132, and the mounting plate 132 is detachably connected to the fixing plate 131 through the first connecting part 1322.

[0044] The flanged structure can be formed by bending the edge of the mounting plate 132 inward or outward. For example, each of the four edges of the mounting plate 132 is provided with a flanged baffle 1321, of which three baffles 1321 are bent inward and one baffle 1321 is bent outward. The inwardly bent baffle 1321 can form a groove for accommodating the sound-absorbing material 133, and the outwardly bent baffle 1321 can be used to connect with the fixing plate 131. A first connecting portion 1322 extends from one side of the mounting plate 132. The first connecting portion 1322 can be a protruding tongue structure extending from the edge of the mounting plate 132, or a connecting ear extending from the surface of the mounting plate 132. The mounting plate 132 is detachably connected to the fixing plate 131 through the first connecting portion 1322. The detachable connection method can be a snap-fit ​​structure, bolt connection, or magnetic connection, etc.

[0045] Through the above technical solutions, this application improves the fixing stability of the sound-absorbing material 133, enhances the edge sealing of the mounting plate 132, and prevents the sound-absorbing material 133 from shifting or falling off due to external environmental influences. Simultaneously, the detachable connection between the mounting plate 132 and the fixing plate 131 improves the convenience and efficiency of disassembly and maintenance. The flanged baffle 1321 enhances the overall strength of the mounting plate 132, reduces sharp angles, and lowers the risk of scratching components during assembly. The extended design of the first connecting part 1322 ensures the rationality of the connection point position between the mounting plate 132 and the fixing plate 131, avoiding connection failure due to uneven stress.

[0046] See Figure 4 Specifically, one end of the fixing plate 131 is provided with a bent part 1311, and the side of the fixing plate 131 is provided with a flange structure.

[0047] Specifically, when the fixing plate 131 is connected to the mounting plate 132 via the bending portion 1311, the bending angle of the bending portion 1311 causes the end of the fixing plate 131 to press downward against the surface of the baffle 1321 of the mounting plate 132, forming a surface contact rather than a line contact. This pressing action tightly compresses the sound-absorbing material 133 within the mounting cavity, preventing airflow from penetrating through the connection gap. Under vibration conditions, the flange structure increases the moment of inertia of the cross section, dispersing local stress to the entire side area and preventing deformation caused by stress concentration. Furthermore, the combination of the bending portion 1311 and the flange structure forms a self-supporting frame structure for the fixing plate 131. During disassembly, the flange structure can be used as a force application point to avoid deformation caused by directly pulling the fixing plate 131 body.

[0048] like Figure 1 As shown, specifically, the bracket 12 is provided with a second connecting part 121 that can be detachably connected to the charging pile 2. The second connecting part 121 is a flanged structure.

[0049] The flanged structure can be integrally formed with the bracket 12 through stamping, or fixed by welding or riveting. The edge shape of the flanged structure can be designed as a continuous arc transition or a segmented stepped structure. The flanged structure facilitates the snap-fit ​​positioning with the door edge of the charging pile 2. The material of the flanged structure can be the same cold-rolled steel plate as the bracket 12, with an electro-galvanized surface treatment.

[0050] Specifically, when the mounting bracket 12 is connected to the charging pile 2, the flanged structure forms a surface contact with the edge of the charging pile 2, resulting in a larger contact area and more even stress distribution. In the vertical direction, the longitudinal height of the flanged structure matches the thickness of the charging pile 2's edge, creating an interference fit to prevent displacement of the mounting bracket 12 under vibration. During disassembly, the smooth edge of the flanged structure slides against the surface of the charging pile 2, avoiding scratches. Furthermore, reinforcing ribs can be installed at the connection between the flanged structure and the mounting bracket 12 body to increase tensile strength and ensure that the structure does not deform after repeated disassembly and reassembly.

[0051] See Figure 2 In one alternative embodiment, at least one first side plate 112 is provided with a plurality of second ventilation holes 1121.

[0052] This application adds a second vent 1121 to the first side plate 112, forming an additional airflow channel. This channel works in conjunction with the first vent 1111 on the base plate 111 to enhance air convection efficiency. This design avoids the airflow obstruction problem caused by relying solely on a unidirectional vent, effectively dissipating internally accumulated heat. As a result, the overall heat dissipation path of the noise reduction device 1 is optimized, maintaining the performance stability of the sound-absorbing material 133 and extending the equipment's service life. Simultaneously, the placement of the second vent 1121 does not affect the noise reduction effect of the sound-absorbing component 13, ensuring a balance between noise reduction and heat dissipation. Furthermore, by providing a vent at least one on the first side plate 112, the varying heat dissipation requirements under different installation environments are met, avoiding structural strength reduction or external noise infiltration caused by excessive perforation.

[0053] like Figure 5 As shown, this utility model also provides a charging pile 2, including a charging pile body 21, a first cabinet door (not shown) and a second cabinet door (not shown) disposed opposite to each other on the charging pile body 21, and the aforementioned noise reduction device 1. The first cabinet door has an air inlet (not shown), and the second cabinet door has an air outlet (not shown). The noise reduction device 1 is hung on the door edge of the first cabinet door and / or the second cabinet door via a bracket 12, and the noise reduction device 1 completely covers the air inlet and / or the air outlet.

[0054] In practical applications, noise reduction devices 1 can be installed on the first cabinet door, the second cabinet door, or both cabinet doors, depending on the specific structure and noise conditions of the charging pile 2. For example, when the noise of the charging pile 2 mainly comes from the air inlet, noise reduction devices 1 can be installed only on the first cabinet door; when the noise mainly comes from the air outlet, noise reduction devices 1 can be installed only on the second cabinet door; when comprehensive noise reduction is required, noise reduction devices 1 can be installed on both cabinet doors simultaneously.

[0055] Through the above technical solution, this application solves the noise reduction coverage problem in multi-ventilation scenarios. Therefore, the noise reduction device 1 can flexibly adapt to different installation locations, effectively expanding the noise reduction coverage area. Furthermore, the noise reduction device 1 completely covers the air inlet and outlet, ensuring that all airflow is treated by the sound-absorbing component 13, eliminating the sound wave diffraction phenomenon caused by incomplete shielding of the air vents in traditional solutions. The structural design of the cabinet doors being arranged opposite each other allows the noise reduction device 1 to adapt to different installation directions, avoiding the problem of the noise reduction device 1 being unable to match due to the limited installation location of the charging pile 2. Specifically, this design improves the environmental adaptability and noise reduction reliability of the device, effectively blocking the noise generated by the fan and module operation from propagating to residential areas, thereby improving the acoustic environment around the charging pile 2.

[0056] The above description is merely a preferred embodiment of the present utility model, and the specific embodiments described above are not intended to limit the present utility model. Various modifications and variations can be made within the scope of the technical concept of the present utility model. All refinements, modifications, or equivalent substitutions made by those skilled in the art based on the above description are within the scope of protection of the present utility model.

Claims

1. A detachable noise reduction device, characterized in that, It includes a housing, a mounting bracket for detachable connection to a charging station, and multiple sound-absorbing components with sound-absorbing material. The housing includes a bottom plate, two first side plates connected to two opposite sides of the bottom plate, and two second side plates connected to the other two opposite sides of the bottom plate. The bottom plate has a plurality of first ventilation holes, and the first side plates and the second side plates are connected to each other. The bracket is detachably installed on the end of the first side plate away from the bottom plate. The two ends of the sound-absorbing component are detachably connected to the two opposite second side plates, and the sound-absorbing component is inclined relative to the plane of the bottom plate.

2. The noise reduction device according to claim 1, characterized in that, The sound-absorbing assembly includes a fixed plate, a mounting plate detachably connected to the second side plate, and sound-absorbing material; The mounting plate surrounds a mounting cavity, the sound-absorbing material is installed in the mounting cavity, the sound-absorbing material is arranged corresponding to the first vent hole, the fixing plate is covered on the sound-absorbing material, and one end of the fixing plate is detachably connected to the mounting plate.

3. The noise reduction device according to claim 2, characterized in that, The mounting plate has baffles on its edges, and at least three baffles have a flanged structure. A first connecting part extends from one side of the mounting plate, and the mounting plate is detachably connected to the fixing plate through the first connecting part.

4. The noise reduction device according to claim 2, characterized in that, One end of the fixing plate is provided with a bent part, and the side part of the fixing plate is provided with a flange structure.

5. The noise reduction device according to claim 1, characterized in that, The mounting bracket is provided with a second connecting part that can be detachably connected to the charging pile. The second connecting part is a flanged structure.

6. The noise reduction device according to any one of claims 1 to 5, characterized in that, At least one of the first side plates has multiple second ventilation holes.

7. A charging pile, characterized in that, The device includes a charging pile body, a first cabinet door and a second cabinet door disposed opposite to each other on the charging pile body, and a noise reduction device as described in any one of claims 1 to 6, wherein the first cabinet door is provided with an air inlet and the second cabinet door is provided with an air outlet. The noise reduction device is hung on the door edge of the first cabinet door and / or the second cabinet door via the bracket, and the noise reduction device completely covers the air inlet and / or the air outlet.

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