Panel, box assembly and air handling unit

Abstract

The utility model discloses a panel, box subassembly and air handling unit relates to air conditioning equipment technical field, wherein the panel is provided with a plurality of counter bores for the screw to insert, guide hole and stop part for the thread to pass through and apply sliding resistance to the thread, the inner diameter of the counter bores is matched with the maximum outer diameter of the nut of screw, the guide hole is matched with the guide hole, and the stop part is matched with the guide hole. And the minimum aperture of the guide hole is matched with the outer diameter of a thread of the screw. Therefore, in the process of pushing the screws into the mounting holes of the panel, the counter bores can guide the nuts, the guide holes guide the threads, the situation that screw alignment is affected by thread deflection is avoided, and the assembling efficiency of the panel and the box body is improved. In the process of disassembling the screw, the anti-disengaging part inhibits the screw from disengaging from the mounting hole. The disassembled panel and the screw are limited by the anti-falling part to form a combined structure which is not easy to fall off, and the screw is still positioned in the mounting hole, so that the problem that the screw is easy to lose after being disassembled can be solved; and the panels and the screws can be fed after being assembled, so that the assembly efficiency of a production line is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of air-conditioning equipment, in particular to a panel, a box assembly and an air handling unit. Background Art

[0002] In the related art, the panel and the box of the air handling unit are connected by screws. During assembly on the factory assembly line, workers are required to hold a pneumatic screwdriver in one hand and a screw in the other hand, align the screw with the mounting hole of the panel, and then tighten the screw with the pneumatic screwdriver. The above assembly process is cumbersome, the production efficiency is low, and the screws are easy to fall off. During after-sales installation or maintenance, workers need to disassemble and assemble the screws of the panel, but due to the narrow installation space and complex installation environment of the air handling unit, and the small size of the screws, it is difficult to find them after they fall, and they need to be reassembled, which affects the after-sales efficiency. Utility Model Content

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a panel in which the panel and screws are constructed into a non-detachable assembly structure, which can improve the assembly efficiency of the panel and the box body and solve the problem of screws being easily lost after disassembly.

[0004] The utility model also provides a box assembly and an air handling unit having the panel.

[0005] According to an embodiment of the first aspect of the present invention, a panel is mounted on a housing of an air handling unit, comprising: a plurality of mounting holes for screws to be inserted along a first direction, the mounting holes comprising countersunk holes and guide holes connected along the first direction, the diameter of the countersunk holes being adapted to the maximum outer diameter of the nuts of the screws, and the minimum diameter of the guide holes being adapted to the outer diameter of the threads of the screws;

[0006] The anti-slip portion is configured to allow the screw thread to pass along the first direction and to provide a sliding resistance to the screw thread in a direction opposite to the first direction.

[0007] The panel according to the embodiment of the present invention has at least the following beneficial effects:

[0008] The panel is provided with multiple countersunk holes, guide holes, and anti-slip portions for the screw threads to pass through and apply sliding resistance to the threads. The inner diameter of the countersunk holes matches the maximum outer diameter of the screw nut, and the minimum diameter of the guide holes matches the outer diameter of the screw threads. Therefore, when the screw is pushed into the panel's mounting hole, the countersunk holes guide the nut, preventing it from tilting and affecting the screw's alignment; the guide holes guide the threads, preventing it from tilting and affecting the screw's alignment. This also eliminates the need for workers to manually adjust the screw position, improving the assembly efficiency of the panel and the housing. After the thread passes through the anti-slip portion in a first direction, the anti-slip portion applies sliding resistance to the thread in the opposite direction, for example, by locally interfering around the thread or by interfering around the edge of the thread. This prevents the screw from falling out of the mounting hole during removal. After removal, the panel and screw are restrained by the anti-slip portion to form a combined structure that is not easily disengaged, and the screw remains in the mounting hole, which can solve the problem of screw loss after removal. The panel and screw can also be assembled and processed later, further improving the assembly efficiency of the production line.

[0009] According to some embodiments of the present invention, the anti-slip portion is provided in the mounting hole; or the anti-slip portion is located outside the end surface of the mounting hole at the end along the first direction.

[0010] According to some embodiments of the present invention, the anti-slip portion is configured as a gasket, and the gasket is provided with a through hole, and the minimum inner circumference diameter of the through hole is smaller than the outer diameter of the screw thread.

[0011] According to some embodiments of the present invention, the gasket is installed between the counterbore and the guide hole; or,

[0012] The gasket is installed at the end of the guide hole away from the counterbore; or

[0013] The gasket is installed in the guide hole.

[0014] According to some embodiments of the present invention, the panel includes:

[0015] plate body;

[0016] a frame fixedly connected to at least one side of the panel, the mounting hole being formed in the frame, the countersunk hole and the guide hole being spaced apart along the thickness direction of the panel so that the frame forms an insertion slot between the countersunk hole and the guide hole;

[0017] Wherein, the plate body includes a hanging ear protruding toward one side of the frame, the hanging ear includes the gasket, and the gasket is inserted into the insertion groove.

[0018] According to some embodiments of the present invention, the plate body and the hanging ears are metal parts, and the frame is a plastic part.

[0019] According to some embodiments of the present invention, the anti-slip portion is configured as a cylindrical body, and the minimum diameter of the inner hole of the cylindrical body is smaller than the outer diameter of the screw thread;

[0020] Alternatively, the inner hole of the cylindrical body has a plurality of protrusions arranged at intervals along the circumference of the cylindrical body, and the maximum inscribed circle diameter of the structure enclosed by the plurality of protrusions is smaller than the outer diameter of the screw thread.

[0021] According to some embodiments of the present invention, the cylindrical body is formed throughout the guide hole;

[0022] The cylindrical body is formed at one end of the guide hole facing the outer side of the panel; or,

[0023] The cylindrical body is formed at one end of the guide hole facing the inner side of the panel; or,

[0024] The guide hole includes a first hole segment and a second hole segment arranged along the thickness direction of the panel, and the cylindrical body is formed between the first hole segment and the second hole segment.

[0025] According to some embodiments of the present invention, the diameter of the guide hole gradually increases in a direction away from the counterbore.

[0026] According to the second embodiment of the present invention, the box assembly includes a box body, a peripheral wall, and at least one side of the peripheral wall is provided with a mounting opening;

[0027] The panel described in the above embodiment is fixedly connected to the peripheral wall by screws and covers the installation opening.

[0028] The box assembly according to the embodiment of the utility model has at least the following beneficial effects:

[0029] The panel using the embodiment of the first aspect is provided with a plurality of countersunk holes for screw insertion, guide holes, and anti-slip parts for the screw threads to pass through and apply sliding resistance to the screw threads. The inner diameter of the countersunk hole is adapted to the maximum outer diameter of the screw nut, and the minimum diameter of the guide hole is adapted to the outer diameter of the screw thread. Therefore, in the process of pushing the screw into the mounting hole of the panel, the countersunk hole can guide the nut to prevent the nut from being skewed and affecting the screw alignment; the guide hole guides the screw thread to prevent the screw from being skewed and affecting the screw alignment, and there is no need for workers to manually adjust the position of the screw, thereby improving the assembly efficiency of the panel and the box. After the screw thread passes through the anti-slip part along the first direction, the anti-slip part can apply sliding resistance to the screw thread in the opposite direction to the first direction, for example, by adopting a local interference around the screw thread or a peripheral interference around the screw thread, thereby preventing the screw from falling off the mounting hole during the removal of the screw. After disassembly, the panel and screws are constructed into a combined structure that is not easy to separate under the restriction of the anti-slip part, and the screws are still located in the mounting hole, which can solve the problem of the screws being easily lost after disassembly; the panel and screws can also be assembled and processed later, further improving the assembly efficiency of the production line.

[0030] The air handling unit according to the third embodiment of the present invention includes the box assembly described in the above embodiment.

[0031] The air handling unit according to the embodiment of the present invention has at least the following beneficial effects:

[0032] The box assembly of the second embodiment is adopted. The panel of the box assembly is provided with a plurality of countersunk holes for screw insertion, guide holes and anti-slip parts for the screw threads to pass through and apply sliding resistance to the screw threads. The inner diameter of the countersunk hole is adapted to the maximum outer diameter of the screw nut, and the minimum hole diameter of the guide hole is adapted to the outer diameter of the screw thread. Therefore, in the process of pushing the screw into the mounting hole of the panel, the countersunk hole can guide the nut to prevent the nut from being skewed and affecting the screw alignment; the guide hole guides the screw thread to prevent the screw from being skewed and affecting the screw alignment, and there is no need for workers to manually adjust the position of the screw, thereby improving the assembly efficiency of the panel and the box. After the screw thread passes through the anti-slip part in a first direction, the anti-slip part can apply sliding resistance to the screw thread in the opposite direction to the first direction, for example, by adopting a local interference around the screw thread or a peripheral interference around the screw thread, thereby preventing the screw from falling off the mounting hole during the removal of the screw. After disassembly, the panel and screws are constructed into a combined structure that is not easy to separate under the restriction of the anti-slip part, and the screws are still located in the mounting hole, which can solve the problem of the screws being easily lost after disassembly; the panel and screws can also be assembled and processed later, further improving the assembly efficiency of the production line.

[0033] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0035] Figure 1 This is an exploded schematic diagram of a box assembly according to an embodiment of the present invention;

[0036] Figure 2 This is a schematic structural diagram of a panel according to an embodiment of the present invention;

[0037] Figure 3 A cross-sectional view of a panel according to an embodiment of the present invention;

[0038] Figure 4 for Figure 3 Enlarged view of point A in the middle;

[0039] Figure 5 This is a simplified structural diagram of the mounting ear of the first embodiment of the present utility model;

[0040] Figure 6 This is a simplified structural diagram of a mounting ear according to a second embodiment of the present invention;

[0041] Figure 7 This is a simplified structural diagram of a mounting ear according to a third embodiment of the present invention;

[0042] Figure 8 This is a simplified structural diagram of a mounting ear according to a fourth embodiment of the present invention;

[0043] Figure 9 This is an exploded schematic diagram of a panel according to an embodiment of the present invention;

[0044] Figure 10 for Figure 9 Enlarged view of point B in the middle;

[0045] Figure 11 This is a cross-sectional view of the installation position of a mounting ear according to an embodiment of the present invention;

[0046] Figure 12 This is a cross-sectional view of the installation position of a mounting ear according to another embodiment of the present invention;

[0047] Figure 13 This is a partial structural diagram of a frame according to an embodiment of the present invention;

[0048] Figure 14 for Figure 13 Enlarged view of point C in the middle;

[0049] Figure 15 This is a partial structural diagram of a frame of another embodiment of the present utility model;

[0050] Figure 16 for Figure 15 Enlarged view of point D in the middle;

[0051] Figure 17 This is a cross-sectional view of the frame and screws in another embodiment of the present invention.

[0052] Figure Number:

[0053] Box assembly 1000;

[0054] Panel 100; mounting hole 110; countersunk hole 111; guide hole 112; first hole section 113; second hole section 114; retaining portion 120; through hole 121; cylindrical body 122; protrusion 123; mounting lug 130; plate body 140; first connecting hole 141; frame 150; insertion slot 151; mounting slot 152; groove 153; second connecting hole 152; screw 160; nut 161; washer 170;

[0055] Box body 200; peripheral wall 210; installation opening 220. DETAILED DESCRIPTION

[0056] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0057] In the description of the present invention, it should be understood that descriptions involving orientation, such as the orientation or positional relationship indicated by up, down, etc., are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0058] In the description of this utility model, "a plurality" means more than two. The use of "first" or "second" is solely for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of technical features indicated, or implicitly indicating the order of the technical features indicated.

[0059] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0060] Reference Figure 1As shown, a box assembly 1000 of an embodiment of the present invention includes a panel 100 and a box 200, and the panel 100 and the box 200 are connected by screws 160. The box assembly 1000 is used in an air handling unit, and a heat exchanger, a fan, an electronic control component and other structures are installed in the box assembly 1000, so the box assembly 1000 can play a protective role. In order to improve the assembly efficiency of the panel 100 and the box 200, and solve the problem that the screws 160 are easily lost after disassembly, refer to Figure 2 、 Figure 3 and Figure 4 As shown, a panel 100 according to an embodiment of the present invention has a plurality of mounting holes 110 and retaining members 120. The mounting holes 110 allow screws 160 to be inserted along a first direction. For example, four mounting holes 110 are provided, with two mounting holes 110 each at the top and bottom of the panel 100. Of course, other numbers of mounting holes 110 are possible, such as one, two, or three, depending on the specific situation.

[0061] Reference Figure 4 As shown, the mounting hole 110 includes a countersunk hole 111 and a guide hole 112, the countersunk hole 111 and the guide hole 112 are connected, and the countersunk hole 111 and the guide hole 112 are arranged along a first direction. For example, the first direction is Figure 4 In the direction from front to back, the countersunk hole 111 is located on the front side of the panel 100, and the guide hole 112 is located on the rear side of the panel 100. The aperture of the countersunk hole 111 is adapted to the maximum outer diameter of the nut 161 of the screw 160, and the minimum aperture of the guide hole 112 is adapted to the outer diameter of the thread of the screw 160. The anti-slip portion 120 is configured to allow the thread to pass through in a first direction and provide sliding resistance to the thread in a second direction, which is opposite to the first direction. It should be noted that the adaptation should be understood as follows: the aperture of the countersunk hole 111 is slightly larger than the maximum outer diameter of the nut 161, and the minimum aperture of the guide hole 112 is slightly larger than the outer diameter of the thread. The way of applying sliding resistance to the thread is to limit the screw 160 from disengaging from the anti-slip portion 120 in the second direction by means of local interference around the thread or interference around the circumference of the thread.

[0062] It is understood that, with the above solution, when the screw 160 is pushed into the mounting hole 110 of the panel 100 along the first direction, the countersunk hole 111 can guide the nut 161 to prevent the nut 161 from tilting and affecting the alignment of the screw 160, and the guide hole 112 guides the thread to prevent the thread from tilting and affecting the alignment of the screw 160. In addition, there is no need for workers to manually adjust the position of the screw 160, thereby improving the assembly efficiency of the panel 100 and the housing 200. After the thread passes through the anti-slip portion 120, the anti-slip portion 120 can apply sliding resistance to the thread, for example, by using a local interference fit around the thread or an interference fit around the edge of the thread, thereby preventing the screw 160 from falling off the mounting hole 110 during the removal process of the screw 160. After disassembly, the panel 100 and the screw 160 are constrained by the anti-slip portion 120 to form a combined structure that is not easy to separate. The screw 160 is still located in the mounting hole 110, which can solve the problem that the screw 160 is easily lost after disassembly. The panel 100 and the screw 160 can also be assembled and then processed, further improving the assembly efficiency of the production line. For example, the screw 160 is pre-installed on the panel 100, and the anti-slip portion 120 ensures that the screw 160 is not easily separated from the panel 100. When the panel 100 enters the assembly line and is assembled with the box 200, the steps of finding the screw 160, aligning the screw 160, etc. can be eliminated. The panel 100 can be directly fastened to the box 200, and then the screw 160 can be tightened. Therefore, the assembly steps of the panel 100 and the box 200 are reduced, and the assembly efficiency is higher.

[0063] Reference Figure 4 As shown, in the embodiment of the present invention, the aperture of the guide hole 112 gradually increases in the direction away from the counterbore 111. It is understandable that due to manufacturing precision issues, it is difficult to ensure that the guide hole 112 and the hole position on the box body 200 are exactly aligned. Therefore, by setting the aperture of the guide hole 112 to gradually increase in the forward and backward direction, the screw 160 has a certain space to swing in the guide hole 112, and the position of the screw 160 can be adjusted to align with the hole position on the box body 200, thereby ensuring the stability and reliability of the installation of the panel 100 and the box body 200, and improving the yield rate of the box body assembly 1000. Among them, the guide hole 112 is designed in the form of a tapered hole, which has a certain draft angle, which is convenient for demolding during injection molding.

[0064] Reference Figure 4 and Figure 5 As shown, in the embodiment of the present invention, the anti-slip portion 120 is provided in the mounting hole 110, which can more effectively limit the separation of the screw 160 and the mounting hole 110. It should be noted that the mounting hole 110 of this embodiment is a structure that passes through the front and rear ends of the panel 100, for example Figure 4 The counterbore 111 and the guide hole 112, and Figure 12The groove 153 in the mounting hole 110 is also part of the mounting hole 110. The anti-slip portion 120 is arranged in the mounting hole 110, which can be understood as follows: the anti-slip portion 120 is configured as a gasket 170 and is inserted into the mounting hole 110; or the anti-slip portion 120 is configured as other limiting structures and is fixedly connected to the mounting hole 110, and the fixed connection method can be one-piece molding, bonding, etc. In another embodiment, the anti-slip portion 120 can also be located outside the end surface of the mounting hole 110 at the end along the first direction. For example, the anti-slip portion 120 is configured as a gasket 170, and a receiving groove for receiving the gasket 170 is provided on the side of the box body 200 facing the panel 100, so that one side of the panel 100 and one side of the box body 200 are fitted together.

[0065] Reference Figure 5 As shown, in an embodiment of the present invention, the anti-slip portion 120 is configured as a washer 170, which is provided with a through hole 121, and the minimum inner diameter of the through hole 121 is smaller than the outer diameter of the screw thread. It should be noted that the screw 160 includes a polished rod section and a screw rod section, one end of the polished rod section is connected to the nut 161, and the other end is connected to the screw rod section. The polished rod section is a rod section with a smooth arc surface on the outer wall, and the outer wall of the screw rod section is provided with screw threads. Therefore, after the screw rod section of the screw 160 is inserted into the through hole 121 by spiral rotation, the polished rod section of the screw 160 and the hole wall of the through hole 121 are matched. Because the minimum inner diameter of the through hole 121 is smaller than the outer diameter of the screw thread, when the screw 160 is only pulled along the axial direction of the through hole 121, the screw thread is blocked, making it difficult for the screw 160 to separate from the anti-slip portion 120, so that the screw 160 is always located in the mounting hole 110, thereby reducing the problem of the screw 160 being easily lost after disassembly.

[0066] The shape of the through hole 121 can be a circular hole, for example Figure 5 The shape of the through hole 121 can also be a square hole, for example Figure 6 The shape of the through hole 121 can also be a plum blossom hole, for example Figure 7 As shown; the shape of the through hole 121 can also be an elliptical hole, for example Figure 8 Of course, the shape of the through hole 121 can also be a cross hole, a star hole, etc., and the appropriate shape of the through hole 121 can be selected according to actual conditions.

[0067] Reference Figure 4As shown, in an embodiment of the present invention, a gasket 170 is installed between the countersunk hole 111 and the guide hole 112. It will be appreciated that by placing the gasket 170 between the countersunk hole 111 and the guide hole 112, the structure of the gasket 170 can be simplified. When removing the screw 160, the gasket 170 can prevent the screw 160 from separating from the panel 100, and the screw 160 remains within the mounting hole 110. Simultaneously, the gasket 170 can act as a washer, and the nut abuts against the gasket 170, thereby improving the stability and reliability of the connection between the panel 100 and the housing 200. It should be noted that the screw 160 can be pre-installed on the gasket 170. When assembling the panel 100 and the housing 200, the steps of finding and aligning the screw 160 can be eliminated. The panel 100 can be directly snapped onto the housing 200, and the screw 160 can then be tightened using a pneumatic screwdriver. The assembly steps of the panel 100 and the box body 200 are reduced, thereby improving assembly efficiency.

[0068] Reference Figure 11 As shown, in another embodiment of the present invention, the structures of the mounting hole 110 and the gasket 170 of the panel 100 are substantially the same as those of the above-described embodiment, with the difference being that the gasket 170 of this embodiment is installed in the guide hole 112. For example, a mounting groove 152 communicating with the guide hole 112 is provided on the frame 150, the mounting groove 152 being located in the middle of the guide hole 112, and the gasket 170 being inserted into the mounting groove 152. By disposing the gasket 170 in the guide hole 112, it is possible to ensure that the screw 160 passes through the through hole 121 of the gasket 170 during installation. This can also improve the stability and reliability of the gasket 170 and reduce adverse effects such as deformation and bending of the gasket 170 caused by removing the screw 160.

[0069] Reference Figure 12 As shown, in another embodiment of the present invention, the structure of the mounting hole 110 and the gasket 170 of the panel 100 is basically the same as that of the above-mentioned embodiment, the difference being that the gasket 170 of this embodiment is installed at the end of the guide hole 112 away from the counterbore 111, that is, the gasket 170 is located at the rear end of the guide hole 112, and the through hole 121 is connected to the guide hole 112. Among them, the rear end of the guide hole 112 is provided with a groove 153 for accommodating the gasket 170, which can effectively prevent the gasket 170 from protruding from the frame 150 of the panel 100, and is beneficial to the installation of the panel 100 and the box body 200. It should be noted that the groove 153 is part of the mounting hole 110, so the gasket 170 is arranged in the mounting hole 110. Therefore, the screw 160 is sequentially passed through the counterbore 111, the guide hole 112 and the through hole 121 during installation. The limitation of the gasket 170 can prevent the screw 160 from being directly separated from the panel 100 during disassembly, thereby reducing the risk of the screw 160 being lost after disassembly. Figure 2 and Figure 4As shown, in the embodiment of the present invention, the panel 100 includes a plate body 140 and a frame 150. The frame 150 is fixedly connected to at least one side of the plate body 140. For example, two frames 150 are provided and are respectively connected to the upper and lower ends of the panel 100. The mounting hole 110 is formed in the frame 150, and the countersunk hole 111 and the guide hole 112 are spaced apart along the thickness direction of the panel 100 so that the frame 150 forms an insertion groove 151 between the countersunk hole 111 and the guide hole 112. Figure 9 and Figure 10 As shown, the plate body 140 includes a lug 130 protruding toward one side of the frame 150. The lug 130 includes a gasket 170 and a connector. The connector is connected between the frame and the gasket 170, and the gasket 170 is inserted into the insertion slot 151. The lug 130 and the plate body 140 are integrally formed. For example, the plate body 140 is a sheet metal part, and the lug 130 is manufactured through a stamping process. By providing the insertion slot 151, the installation and alignment of the lug 130 can be facilitated, thereby ensuring that the screw 160 can be smoothly inserted into the through hole 121, thereby improving the assembly efficiency of the screw 160.

[0070] In another embodiment of the present invention, the gasket 170 can be configured as an independent sheet structure and connected to the mounting hole 110 (i.e., in the frame 150) by snapping, bonding or other means, or connected to the end face of the mounting hole 110 along the first direction (i.e., the inner end face of the frame 150), which is no longer specifically limited here.

[0071] In the embodiment of the present invention, the plate 140 and the mounting lugs 130 are metal, and the frame 150 is plastic. For example, the metal components used for the plate 140 and the mounting lugs 130 can be aluminum alloy, stainless steel, or other non-ferrous metals. Aluminum alloy offers excellent strength, corrosion resistance, lightweight, and a relatively affordable price. It also provides good structural support and serves as a safety feature. Stainless steel has excellent corrosion resistance and strength, as well as high durability and scratch resistance. It should be noted that since the refrigerant used in some air handling units is flammable, if a refrigerant leak occurs, accumulation within the air handling unit to a certain concentration can create an explosion risk. Therefore, the plate 140 is made of metal, which offers greater strength than plastic. This provides some protection against refrigerant explosions, effectively preventing the plate 140 from breaking into large fragments during the explosion and causing widespread injury to users. Of course, for air handling units that do not require explosion-proofing, the plate 140 can also be made of plastic. The appropriate solution should be selected based on the actual situation.

[0072] Because frame 150 is attached to the edge of panel 140 and is not the primary impact point of an explosion, it can be made of plastic, reducing production costs. Furthermore, the use of plastic for frame 150 allows for injection molding of complex shapes, thereby forming structures such as countersunk holes 111, guide holes 112, and insertion slots 151. This facilitates the installation of screws 160 and improves the efficiency of assembly between panel 100 and housing 200.

[0073] In addition to the method of setting the through hole 121 in the hanging ear 130 to limit the separation of the screw 160 and the panel 100, Figure 13 and Figure 14 As shown, in another embodiment of the present invention, the anti-slip portion 120 is configured as a cylindrical body 122, and the inner hole of the cylindrical body 122 has a plurality of protrusions 123 arranged at intervals along the circumference of the cylindrical body 122. The maximum inscribed circle diameter of the structure enclosed by the plurality of protrusions 123 is smaller than the outer diameter of the screw thread. For example, there are four protrusions 123 and they are arranged at intervals along the circumference of the cylindrical body 122. Of course, the number of protrusions 123 can also be other numbers, such as two, three, five, etc. The protrusions 123 extend along the axial direction of the cylindrical body 122, and the axial direction of the cylindrical body 122 is Figure 14 The diameter of the largest inscribed circle of the structure formed by the plurality of protrusions 123 refers to: Figure 14 On the projection plane from back to front of the center edge, the inscribed circle that is tangent to the end of the multiple protrusions 123 closest to the central axis of the cylindrical body 122, and this inscribed circle has the largest diameter, is the largest inscribed circle. It should be noted that the largest inscribed circle does not need to be tangent to the end of each protrusion 123, but only needs to be tangent to the ends of at least some of the protrusions 123. Because the minimum inner circumference diameter of the structure formed by the multiple protrusions 123 is smaller than the outer diameter of the screw thread, it can prevent the screw 160 from separating from the cylindrical body 122, thereby reducing the risk of the screw 160 being lost after disassembly.

[0074] Reference Figure 15 and Figure 16 As shown, in another embodiment of the present invention, the structure of the mounting hole 110 of the panel 100 is substantially the same as that of the above-mentioned embodiment, except that the anti-slip portion 120 of this embodiment is configured as a cylindrical body 122, and the minimum diameter of the inner hole of the cylindrical body 122 is smaller than the outer diameter of the screw thread. Therefore, the screw 160 and the cylindrical body 122 are also prevented from separating, thereby reducing the risk of the screw 160 being lost after removal.

[0075] In an embodiment of the present invention, the cylindrical body 122 can be formed on the inner wall of the integral guide hole 112. Alternatively, the cylindrical body 122 is formed at one end of the guide hole 112 facing the outside of the panel 100, for example, the cylindrical body 122 is formed at the front end of the guide hole 112. Alternatively, the cylindrical body 122 is formed at one end of the guide hole 112 facing the outside of the panel 100, for example, the cylindrical body 122 is formed at the rear end of the guide hole 112. Alternatively, refer to Figure 17 As shown, the guide hole 112 includes a first hole segment 113 and a second hole segment 114 arranged along the thickness direction of the panel 100, and the cylindrical body 122 is formed between the first hole segment 113 and the second hole segment 114. The provision of the cylindrical body 122 can effectively prevent the screw 160 from separating from the cylindrical body 122, thereby reducing the risk of the screw 160 being lost after disassembly.

[0076] A box assembly 1000 according to an embodiment of the present invention comprises the panel 100 and the box 200 of the above embodiment. The box 200 comprises a peripheral wall 210, at least one side of which is provided with a mounting opening 220, and the panel 100 is fixedly connected to the peripheral wall 210 by means of screws 160 and covers the mounting opening 220. The box assembly 1000 according to an embodiment of the present invention adopts the panel 100 of the above embodiment, and by providing the panel 100 with a plurality of countersunk holes 111 for inserting the screws 160, guide holes 112 and anti-slip portions 120 for the screw threads to pass through and apply sliding resistance to the screw threads, the inner diameter of the countersunk holes 111 is adapted to the maximum outer diameter of the nut 161 of the screw 160, and the minimum hole diameter of the guide holes 112 is adapted to the outer diameter of the screw threads of the screw 160. Therefore, when screw 160 is pushed into mounting hole 110 of panel 100, countersunk hole 111 guides nut 161, preventing nut 161 from tilting and affecting the alignment of screw 160. Guide hole 112 guides the thread, preventing thread tilting and affecting the alignment of screw 160. Furthermore, workers do not need to manually adjust the position of screw 160, thereby improving the assembly efficiency of panel 100 and housing 200. After the thread passes through retaining portion 120, retaining portion 120 can apply sliding resistance to the thread, for example, by using a local interference fit around the thread or a circumferential interference fit around the thread, thereby preventing screw 160 from dislodging from mounting hole 110 during removal. After disassembly, panel 100 and screw 160 are constrained by retaining portion 120 to form a combined structure that is not easily disengaged. Screw 160 remains in mounting hole 110, which can solve the problem of screw 160 being easily lost after disassembly. Panel 100 and screw 160 can also be assembled and then processed, further improving the assembly efficiency of the production line. For example, screws 160 are pre-installed on panel 100, and the locking member 120 prevents the screws 160 from separating from the panel 100. When panel 100 enters the assembly line for assembly with housing 200, the steps of finding and aligning screws 160 are eliminated. Panel 100 can simply be fastened to housing 200 and screws 160 tightened. This reduces the number of assembly steps required for panel 100 and housing 200, improving assembly efficiency.

[0077] Since the box assembly 1000 adopts all the technical solutions of the panel 100 of the above embodiment, it has at least all the beneficial effects brought by the technical solutions of the above embodiment, which will not be repeated here.

[0078] Since the box assembly 1000 of the embodiment of the present invention adopts all the technical solutions of the panel 100 of the above embodiment, it has at least all the beneficial effects brought by the technical solutions of the above embodiment, which will not be repeated here.

[0079] An air handling unit according to one embodiment of the present invention includes the box assembly 1000 of the above embodiment. Air handling units, also known as American duct units, are generally installed in attics or basements. Due to the complex installation environment and narrow installation space, a structure in which multiple module boxes 200 are assembled is usually adopted. For example, the box 200 includes a heat exchange box and a fan box. A heat exchange assembly is installed in the heat exchange box, and a fan assembly is installed in the fan box. The heat exchange box and the fan box are constructed as two independent module boxes 200. The heat exchange box and the fan box are detachably connected. The heat exchange box and the fan box can be disassembled and carried separately, and then quickly assembled during installation, thereby facilitating installation by the installer in a narrow installation space, reducing the difficulty of installation and improving the efficiency of installation. It is understandable that due to the narrow installation space, when the air handling unit needs to be repaired or cleaned, the use of a detachable structure of the heat exchange box and the fan box can improve the convenience of maintenance. It should be noted that the air handling unit can also adopt an integrated design, that is, the heat exchange component and the fan component are installed in the same box 200. The appropriate solution is selected according to the actual situation.

[0080] The air handling unit of the embodiment of the present utility model adopts the box assembly 1000 of the above embodiment. The box assembly 1000 is provided with a plurality of countersunk holes 111 for inserting screws 160, guide holes 112 and anti-slip parts 120 for the screw threads to pass through and apply sliding resistance to the screw threads on the panel 100. The inner diameter of the countersunk hole 111 is adapted to the maximum outer diameter of the nut 161 of the screw 160, and the minimum hole diameter of the guide hole 112 is adapted to the outer diameter of the screw thread of the screw 160. Therefore, when the screw 160 is pushed into the mounting hole 110 of the panel 100, the countersunk hole 111 can guide the nut 161 to prevent the nut 161 from being skewed and affecting the alignment of the screw 160. The guide hole 112 guides the screw threads to prevent the skew of the screw threads from affecting the alignment of the screw 160. In addition, there is no need for workers to manually adjust the position of the screw 160, thereby improving the assembly efficiency of the panel 100 and the box 200. After the screw thread passes through the retaining portion 120, the retaining portion 120 can apply sliding resistance to the screw thread, for example, by providing a localized interference fit around the screw thread or a circumferential interference fit around the screw thread. This prevents the screw 160 from dislodging from the mounting hole 110 during removal. After removal, the panel 100 and screw 160 are restrained by the retaining portion 120 to form a combined structure that is difficult to separate. The screw 160 remains in the mounting hole 110, which solves the problem of screw 160 being easily lost after removal. Furthermore, the panel 100 and screw 160 can be assembled and subsequently added, further improving assembly efficiency on the production line. For example, the screw 160 can be pre-installed on the panel 100, and the retaining portion 120 ensures that the screw 160 is not easily separated from the panel 100. When the panel 100 enters the assembly line for assembly with the housing 200, the steps of finding and aligning the screw 160 are eliminated. The panel 100 can simply be snapped onto the housing 200 and the screw 160 can be tightened. Therefore, the number of assembly steps of the panel 100 and the box body 200 is reduced, and the assembly efficiency is higher.

[0081] Since the air handling unit adopts all the technical solutions of the box assembly 1000 of the above embodiment, it has at least all the beneficial effects brought by the technical solutions of the above embodiment, which will not be repeated here.

[0082] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the scope of knowledge possessed by ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. The panel is installed on the box of the air handling unit, characterized in that: include: a plurality of mounting holes for screws to be inserted along a first direction, the mounting holes comprising countersunk holes and guide holes connected along the first direction, the diameter of the countersunk holes being adapted to the maximum outer diameter of the nuts of the screws, and the minimum diameter of the guide holes being adapted to the outer diameter of the threads of the screws; The anti-slip portion is configured to allow the screw thread to pass along the first direction and to provide a sliding resistance to the screw thread in a direction opposite to the first direction.

2. The panel according to claim 1, characterized in that: The anti-slip portion is provided in the mounting hole; or the anti-slip portion is located outside an end surface of the mounting hole at the end along the first direction.

3. The panel according to claim 2, characterized in that: The anti-slip portion is configured as a gasket, and the gasket is provided with a through hole, and the minimum inner circumference diameter of the through hole is smaller than the outer diameter of the screw thread.

4. The panel according to claim 3, characterized in that: The gasket is installed between the counterbore and the guide hole; or, The gasket is installed at the end of the guide hole away from the counterbore; or The gasket is installed in the guide hole.

5. The panel according to claim 3, characterized in that: The panel includes: plate body; a frame fixedly connected to at least one side of the panel, the mounting hole being formed in the frame, the countersunk hole and the guide hole being spaced apart along the thickness direction of the panel so that the frame forms an insertion slot between the countersunk hole and the guide hole; Wherein, the plate body includes a hanging ear protruding toward one side of the frame, the hanging ear includes the gasket, and the gasket is inserted into the insertion groove.

6. The panel according to claim 5, characterized in that: The plate body and the hanging ears are metal parts, and the frame is a plastic part.

7. The panel according to claim 1, characterized in that: The anti-slip portion is configured as a cylindrical body, and the minimum diameter of the inner hole of the cylindrical body is smaller than the outer diameter of the screw thread; Alternatively, the inner hole of the cylindrical body has a plurality of protrusions arranged at intervals along the circumference of the cylindrical body, and the maximum inscribed circle diameter of the structure enclosed by the plurality of protrusions is smaller than the outer diameter of the screw thread.

8. The panel according to claim 7, characterized in that: The cylindrical body is formed throughout the guide hole; The cylindrical body is formed at one end of the guide hole facing the outer side of the panel; or, The cylindrical body is formed at one end of the guide hole facing the inner side of the panel; or, The guide hole includes a first hole segment and a second hole segment arranged along the thickness direction of the panel, and the cylindrical body is formed between the first hole segment and the second hole segment.

9. The panel according to any one of claims 1 to 8, characterized in that: The diameter of the guide hole gradually increases in a direction away from the counterbore.

10. The box assembly is characterized in that: include: The box body comprises a peripheral wall, at least one side of which is provided with a mounting opening; The panel according to any one of claims 1 to 9 is fixedly connected to the peripheral wall by screws and covers the mounting opening.

11. Air handling unit, characterized in that, The invention comprises the box assembly according to claim 10.

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