A return air grille, panel assembly, ducted air conditioner and air conditioner

Abstract

A return air grille, panel assembly, ducted air conditioner and air conditioner. The return air grille comprises: a main body comprising an integrally extruded decorative plate portion, a first frame wall portion and a second frame wall portion, the first frame wall portion and the second frame wall portion being located at the back side of the decorative plate portion and oppositely arranged in the second direction, the decorative plate portion being provided with a return air opening, the return air opening being located between the first frame wall portion and the second frame wall portion in the second direction; and a third frame wall and a fourth frame wall, located at the back side of the decorative plate portion and oppositely arranged in the first direction, the return air opening being located between the third frame wall and the fourth frame wall in the first direction; wherein the first frame wall portion, the third frame wall, the second frame wall portion and the fourth frame wall are sequentially connected. The decorative plate portion, the first frame wall portion and the second frame wall portion are an integrally extruded structure, so that the production efficiency and assembly efficiency of the return air grille are higher, and the return air grille can be cut to any length along the first direction according to requirements.

Description

Technical Field

[0001] This application relates to, but is not limited to, the field of air conditioning equipment technology, specifically to a return air grille, panel assembly, duct unit, and air conditioner. Background Technology

[0002] Currently, there are two types of return air grille structures for ducted air conditioners:

[0003] The first structure is injection molding of the return air grille as a whole. This solution has the advantages of high production efficiency, low cost and neat appearance. However, the mold cost is high and it cannot meet the market's demand for size differentiation, so its market share is low.

[0004] The second structure: The four frame walls of the return air grille are all made by extrusion. Then, the four frame walls are cut and assembled according to the installation requirements. This solution has the advantages of low mold investment and customization of various sizes according to user needs. However, this solution has low production and assembly efficiency and at least four splicing gaps on the front (the four splicing gaps are located at the splicing position of the four frame walls), which is less aesthetically pleasing. Summary of the Invention

[0005] This application provides a return air grille, comprising: a main body, the main body including a decorative panel portion, a first frame wall portion, and a second frame wall portion, the decorative panel portion, the first frame wall portion, and the second frame wall portion being integrally extruded; the first frame wall portion and the second frame wall portion being located on the back side of the decorative panel portion and arranged opposite to each other in a second direction, the decorative panel portion having a return air inlet located between the first frame wall portion and the second frame wall portion in the second direction; and a third frame wall and a fourth frame wall, located on the back side of the decorative panel portion and arranged opposite to each other in a first direction, the return air inlet located between the third frame wall and the fourth frame wall in the first direction, the first direction and the second direction intersecting; wherein, the two ends of the third frame wall in the second direction are fixedly connected to the first ends of the first frame wall portion and the first ends of the second frame wall portion in the first direction, respectively, and the two ends of the fourth frame wall in the second direction are fixedly connected to the second ends of the first frame wall portion and the second ends of the second frame wall portion in the first direction, respectively.

[0006] In some exemplary embodiments, the return air grille further includes: a grille support spanning the return air inlet along the second direction on the back side of the decorative panel portion and fixedly connected to the first frame wall portion and the second frame wall portion; and a grille strip located between the return air inlet and the grille support, disposed along the first direction, and the grille strip being fixedly connected to the grille support.

[0007] In some exemplary embodiments, the grid strips are manufactured using an extrusion process, and the grid support, the third frame wall, and the fourth frame wall are manufactured using an injection molding process.

[0008] In some exemplary embodiments, the opposite sides of the third frame wall and the fourth frame wall are provided with limiting grooves, and the two ends of the grid strip in the first direction are positioned in the limiting grooves one by one.

[0009] In some exemplary embodiments, the first frame wall portion has a first extrusion groove extending through the first direction, the opening of the first extrusion groove facing away from the decorative panel portion, the inner side of the first extrusion groove having a second extrusion groove extending through the first direction, the outer side of the first extrusion groove facing away from the second frame wall portion having an extrusion protrusion arranged along the first direction, the extrusion protrusion being configured to engage with the panel, and the first frame wall portion also having an installation notch extending through the second direction.

[0010] In some exemplary embodiments, the second frame wall portion has an extrusion hole extending in the first direction and an extrusion rib arranged along the first direction, the extrusion hole being located between the extrusion rib and the decorative panel portion, the side of the extrusion rib facing the first frame wall portion having a third extrusion groove extending in the first direction, and the second frame wall portion also having a threaded hole extending in the second direction, the mounting notch and the threaded hole being opposite each other in the second direction.

[0011] In some exemplary embodiments, the return air grille further includes: a mounting bracket located on the side of the first frame wall portion facing away from the second frame wall portion and fixed to one end of the grille bracket in the second direction at the mounting notch by a first screw, and the other end of the grille bracket in the second direction being fixed to the screw hole by a second screw.

[0012] In some exemplary embodiments, the third frame wall and the fourth frame wall are provided with a first insert, a second insert, and a third insert on opposite sides, and a third retaining rib is provided on opposite sides of the third frame wall and the fourth frame wall. The first insert is inserted into the through end of the second extrusion groove, the second insert is inserted into the extrusion hole, the third insert is inserted into the through end of the third extrusion groove, and the third retaining rib is configured to engage with the panel.

[0013] In some exemplary embodiments, one end of the grid bracket in the second direction has a fourth insert and a first retaining rib. The fourth insert is inserted into the mounting notch, and the first retaining rib is engaged with the second extrusion groove. The first screw passes through the hook and is screwed onto the fourth insert. The other end of the grid bracket in the second direction has an abutment surface and a second retaining rib. The abutment surface abuts against the outer end face of the screw hole facing the first frame wall portion. The second retaining rib is engaged with the third extrusion groove, and the second screw passes through the screw hole and is screwed onto the abutment surface.

[0014] In some exemplary embodiments, the first frame wall portion and the second frame wall portion are both cut off at both ends of the back side of the decorative panel portion in the first direction. The third frame wall and the fourth frame wall are located at both ends of the back side of the decorative panel portion in the first direction. The ends of the third frame wall and the ends of the fourth frame wall in the second direction are located at the avoidance sections.

[0015] In some exemplary embodiments, the decorative panel portion has extruded insertion portions at both ends on the back side in the first direction, the insertion portions are arranged along the first direction, the third frame wall and the fourth frame wall are provided with insertion mating portions, and the insertion portions are inserted into the insertion mating portions along the first direction.

[0016] This application embodiment also provides a panel assembly, including a panel and the return air grille described in any of the above embodiments. The front side of the panel has a return air area and an air outlet area. The return air area has an air inlet. The decorative panel partially covers the portion of the return air area outside the air inlet. The return air inlet is opposite to the air inlet.

[0017] In some exemplary embodiments, the inlet wall of the air inlet is provided with a first elastic fastener, a second elastic fastener, a third elastic fastener, and a hook-fitting part. The first elastic fastener and the hook-fitting part are located on opposite inlet walls of the return air inlet. The extruded protrusion of the first frame wall portion engages with the first elastic fastener. The third retaining rib of the third frame wall engages with the second elastic fastener. The third retaining rib of the fourth frame wall engages with the third elastic fastener. The hook-fitting part is movably connected to the hook-fitting part.

[0018] This application also provides a duct air conditioner, including the panel assembly described in any of the above embodiments.

[0019] This application also provides an air conditioner, including the ducted air conditioner described in any of the above embodiments.

[0020] The technical solution provided in this application embodiment mainly includes an integrally extruded decorative panel portion, a first frame wall portion, and a second frame wall portion. The first frame wall portion and the second frame wall portion are located on the back side of the decorative panel portion and are arranged opposite to each other in a second direction. A third frame wall and a fourth frame wall are located on the back side of the decorative panel portion and are arranged opposite to each other in a first direction. The two ends of the third frame wall in the second direction are fixedly connected to the first ends of the first frame wall portion and the second frame wall portion in the first direction, respectively. The two ends of the fourth frame wall in the second direction are fixedly connected to the second ends of the first frame wall portion and the third frame wall portion in the first direction, respectively. The second ends of the two frame wall sections in the first direction are fixedly connected one-to-one; in this scheme, the decorative panel section, the first frame wall section, and the second frame wall section are integrally extruded structures, so the production efficiency and assembly efficiency of the return air grille are higher, and it can meet the market's demand for different sizes (that is, the main body can be cut to any length along the first direction as needed); moreover, the first frame wall section, the second frame wall section, the third frame wall section, and the fourth frame wall section are all located on the back side of the decorative panel section, and the front side of the decorative panel section serves as the exposed surface of the return air grille. This exposed surface is a whole plane without splicing gaps, so the return air grille has better aesthetics.

[0021] Other features and advantages of the invention will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures particularly pointed out in the description and the drawings. Attached Figure Description

[0022] The accompanying drawings are provided to further understand the technical solutions of the present invention and constitute a part of the specification. They are used together with the embodiments of this application to explain the technical solutions of the present invention and do not constitute a limitation on the technical solutions of the present invention.

[0023] Figure 1 A perspective view of the front side of the return air grille provided in some embodiments of this application;

[0024] Figure 2 for Figure 1 A three-dimensional structural diagram of the back side of the return air grille shown.

[0025] Figure 3 for Figure 1 The exploded structural diagram of the return air grille shown;

[0026] Figure 4 for Figure 2 A partial exploded structural diagram of the main body, third frame wall, and grille support of the return air grille shown.

[0027] Figure 5 for Figure 4 A schematic diagram of a partial structure after the phase assembly shown;

[0028] Figure 6 for Figure 4 A partial structural diagram of the first screw in the middle section;

[0029] Figure 7 for Figure 4 A partial structural diagram of the second screw in the middle section;

[0030] Figure 8 for Figure 2 An exploded structural diagram of the main body and support frame of the return air grille shown.

[0031] Figure 9 for Figure 8 A schematic diagram of the assembled structure shown in the figure;

[0032] Figure 10 for Figure 5 A partial structural diagram of the first screw in the middle section;

[0033] Figure 11 for Figure 2 A partially exploded structural diagram of the main body, hanging parts, and grille support of the return air grille shown.

[0034] Figure 12 for Figure 2 A three-dimensional structural diagram of the third frame wall;

[0035] Figure 13 and Figure 14 for Figure 2 A partial exploded structural diagram of the third frame wall and the main body of the return air grille shown.

[0036] Figure 15 for Figure 2 A schematic diagram of the left-side structure of the return air grille after the grille support and grille bars are assembled;

[0037] Figure 16 A partial perspective view of the back side structure of a panel assembly provided in some embodiments of this application;

[0038] Figure 17 for Figure 16 A three-dimensional structural diagram of the front side of the panel assembly shown;

[0039] Figure 18 for Figure 16 A three-dimensional structural diagram of the panel assembly with the return air grille in the open state;

[0040] Figure 19 for Figure 16 A schematic cross-sectional view of the left side of the panel assembly shown.

[0041] Figure 20 for Figure 19 A magnified structural diagram of part A in the diagram;

[0042] Figure 21 for Figure 19 A magnified structural diagram of part B in the diagram.

[0043] The attached diagram lists the components represented by each number as follows:

[0044] 100 Main body, 110 Decorative panel section, 111 Return air vent, 112 Insertion part, 120 First frame wall section, 121 First extrusion groove, 122 Second extrusion groove, 123 Extrusion protrusion, 124 Installation notch, 130 Second frame wall section, 131 Extrusion hole, 132 Extrusion rib, 133 Third extrusion groove, 134 Screw hole, 140 Clearance section, 210 Third frame wall, 220 Fourth frame wall, 230 Limiting groove, 240 First insert rib, 250 Second insert rib, 260 Third insert rib 270 Third retaining rib, 280 Insertion mating part, 300 Hanging piece, 400 Grille bracket, 410 Fourth inserting rib, 420 First retaining rib, 430 Second retaining rib, 440 Abutting surface, 450 C-shaped bayonet, 460 Positioning socket, 500 Grille strip, 510 Convex curved surface, 520 Positioning protrusion, 600 Panel, 610 Return air area, 620 Air outlet area, 630 First elastic buckle, 640 Third elastic buckle, 650 Hanging mating part, 810 First screw, 820 Second screw. Detailed Implementation

[0045] To make the objectives, technical solutions, and advantages of the present invention clearer, the embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features described in this application can be arbitrarily combined with each other.

[0046] The return air grille provided in the embodiments of this application, such as Figures 1 to 15As shown, it includes: a main body 100, which includes a decorative panel portion 110, a first frame wall portion 120, and a second frame wall portion 130. The decorative panel portion 110, the first frame wall portion 120, and the second frame wall portion 130 are integrally extruded. The first frame wall portion 120 and the second frame wall portion 130 are located on the back side of the decorative panel portion 110 and are arranged opposite to each other in a second direction. The decorative panel portion 110 has a return air vent 111, which is located between the first frame wall portion 120 and the second frame wall portion 130 in the second direction; and a third frame wall 210 and a fourth frame wall 220 (both the third frame wall 210 and the fourth frame wall 220 are the same as the main body 100). The body 100 is a split structure, located on the back side of the decorative panel part 110 and arranged opposite to each other in the first direction. The return air vent 111 is located between the third frame wall 210 and the fourth frame wall 220 in the first direction, and the first direction and the second direction intersect. The two ends of the third frame wall 210 in the second direction are fixedly connected to the first end of the first frame wall part 120 in the first direction and the first end of the second frame wall part 130 in the first direction, respectively. The two ends of the fourth frame wall 220 in the second direction are fixedly connected to the second end of the first frame wall part 120 in the first direction and the second end of the second frame wall part 130 in the first direction, respectively.

[0047] The return air grille, with its decorative panel 110, first frame wall 120, and second frame wall 130 being integrally extruded, has higher production and assembly efficiency and can meet the market's demand for different sizes (i.e., the main body 100 can be cut to any length along the first direction as needed). Moreover, the first frame wall 120, second frame wall 130, third frame wall 210, and fourth frame wall 220 are all located on the back side of the decorative panel 110, while the front side of the decorative panel 110 serves as the exposed surface of the return air grille. This exposed surface is a flat surface without any splicing gaps, thus improving the aesthetics of the return air grille.

[0048] In some examples, such as Figures 2 to 11 As shown, the return air grille also includes: a grille support 400, which spans the return air inlet 111 along a second direction on the back side of the decorative panel portion 110 and is fixedly connected to the first frame wall portion 120 and the second frame wall portion 130; and a grille strip 500, which is located between the return air inlet 111 and the grille support 400 and is arranged along a first direction. The grille strip 500 is fixedly connected to the grille support 400, the third frame wall 210, and the fourth frame wall 220, thus increasing the structural strength of the grille strip 500. The first direction can be left-right, and the second direction can be front-back.

[0049] Among them, such as Figure 8 , Figure 9 and Figure 15As shown, the lower part of the grid support 400 is provided with a C-shaped bayonet 450, and the interior of the C-shaped bayonet 450 is provided with a positioning socket 460. The upper part of the grid strip 500 is a convex curved surface 510, and the convex curved surface 510 is provided with a positioning protrusion 520. The convex curved surface 510 is inserted into the C-shaped bayonet 450 to realize the snap connection between the grid strip 500 and the grid support 400. The positioning protrusion 520 is inserted into the positioning socket 460 to ensure that the relative position between the grid strip 500 and the grid support 400 is unique.

[0050] In some embodiments, the grid strip 500 is made by extrusion, which results in low mold cost and meets the market demand for size differentiation (i.e., the grid strip 500 can be cut to any length along the first direction as needed). The grid support 400, the third frame wall 210 and the fourth frame wall 220 are made by injection molding, which results in small size, low mold cost and high production efficiency.

[0051] In some examples, such as Figure 2 , Figure 3 and Figure 12 As shown, the opposite sides of the third frame wall 210 and the fourth frame wall 220 are provided with limiting grooves 230. The two ends of the grid strip 500 in the first direction are positioned in the limiting grooves 230 respectively. This scheme uses the limiting grooves 230 to position the two ends of the grid strip 500 in the first direction, which can improve the structural strength of the two ends of the grid strip 500 in the first direction.

[0052] In some embodiments, such as Figures 4 to 6 , Figures 8 to 10 , Figure 13 As shown, the first frame wall portion 120 has a first extrusion groove 121 extending in a first direction, the opening of the first extrusion groove 121 facing away from the decorative panel portion 110, the inner side of the first extrusion groove 121 has a second extrusion groove 122 extending in the first direction, and the outer side of the first extrusion groove 121 facing away from the second frame wall portion 130 has an extrusion protrusion 123 arranged along the first direction, the extrusion protrusion 123 being configured to engage with the panel 600 of the duct unit (e.g., Figure 20 As shown), the first frame wall portion 120 also has an installation notch 124 extending in the second direction. The first extrusion groove 121, the second extrusion groove 122, and the extrusion protrusion 123 are all manufactured during the extrusion of the main body 100. Compared to secondary manufacturing through machining, this method has higher production efficiency and lower production costs. The installation notch 124 is manufactured through machining and cannot be manufactured during the extrusion of the main body 100.

[0053] In some exemplary embodiments, such as Figure 4 , Figure 5 , Figures 7 to 9 , Figure 11 and Figure 14As shown, the second frame wall portion 130 has an extrusion hole 131 extending in a first direction and an extrusion rib 132 arranged along the first direction. The extrusion hole 131 is located between the extrusion rib 132 and the decorative panel portion 110. The side of the extrusion rib 132 facing the first frame wall portion 120 has a third extrusion groove 133 extending in the first direction. The second frame wall portion 130 also has a threaded hole 134 extending in the second direction. The mounting notch 124 and the threaded hole 134 are opposite each other in the second direction. The extrusion rib 132, the third extrusion groove 133, and the extrusion hole 131 are all manufactured during the extrusion of the main body 100. Compared with secondary manufacturing through machining, this solution has higher production efficiency and lower production cost. The threaded hole 134 is manufactured through machining and cannot be manufactured during the extrusion of the main body 100.

[0054] In some embodiments, the return air grille further includes: a mounting bracket 300, which is located on the side of the first frame wall portion 120 facing away from the second frame wall portion 130 and is fixed to the mounting notch 124 by a first screw 810 at one end of the grille bracket 400 in the second direction, and the other end of the grille bracket 400 in the second direction is fixed to the screw hole 134 by a second screw 820.

[0055] The grid bracket 400 has a fourth insert rib 410 and a first retaining rib 420 at one end in the second direction. A second extrusion groove 122 is located on the inner side of the side wall of the first extrusion groove 121 away from the second frame wall 130. The fourth insert rib 410 is inserted into the mounting notch 124, and the first retaining rib 420 is engaged with the second extrusion groove 122. A first screw 810 passes through the hanger 300 and is screwed onto the fourth insert rib 410, thus securing the first retaining rib 420 to the second extrusion groove 122. This ensures that the hanger 300 and the grid bracket 400 at one end in the second direction are firmly fixed to the mounting notch 124 by the first screw 810. The grid bracket 400 has an abutment surface 440 and a second retaining rib 430 at its other end in the second direction. A third extrusion groove 133 is located on the side of the extrusion rib 132 facing the first frame wall portion 120. The abutment surface 440 abuts against the outer end face of the screw hole 134 facing the first frame wall portion 120. The second retaining rib 430 is engaged with the third extrusion groove 133. A second screw 820 passes through the screw hole 134 and is screwed onto the abutment surface 440, thus securely engaging the second retaining rib 430 with the third extrusion groove 133. This ensures that the other end of the grid bracket 400 in the second direction is firmly fixed to the screw hole 134 by the second screw 820. Alternatively, the screw hole 134 can be designed as a notch structure, which makes manufacturing easier.

[0056] In some embodiments, such as Figure 4 , Figure 5 , Figure 13 and Figure 14As shown, the third frame wall 210 and the fourth frame wall 220 are provided with a first insert rib 240, a second insert rib 250 and a third insert rib 260 on opposite sides, and a third retaining rib 270 is provided on opposite sides of the third frame wall 210 and the fourth frame wall 220. The first insert rib 240 is inserted into the through end of the second extrusion groove 122 for pre-positioning, the second insert rib 250 is inserted into the extrusion hole 131 for pre-positioning, and the third insert rib 260 is inserted into the through end of the third extrusion groove 133 for pre-positioning. Then, the third frame wall 210 and the first frame wall portion 120, the third frame wall 210 and the second frame wall portion 130, the fourth frame wall 220 and the first frame wall portion 120, and the fourth frame wall 220 and the second frame wall portion 130 are respectively fixedly connected by screws. The third retaining rib 270 is configured to snap into the panel 600 of the duct machine (e.g., Figure 16 (As shown).

[0057] In some examples, such as Figures 3 to 5 , Figure 13 and Figure 14 As shown, the first frame wall portion 120 and the second frame wall portion 130 both have clearance sections 140 cut off at both ends of the back side of the decorative panel portion 110 in the first direction. The third frame wall 210 and the fourth frame wall 220 are located at both ends of the back side of the decorative panel portion 110 in the first direction. The two ends of the third frame wall 210 in the second direction and the two ends of the fourth frame wall 220 in the second direction are located one-to-one at the four clearance sections 140. Two screws pass through along the first direction. The third frame wall 210 is screwed onto the first frame wall portion 120 and the second frame wall portion 130 respectively. Two screws pass through the fourth frame wall 220 along the first direction and are screwed onto the first frame wall portion 120 and the second frame wall portion 130 respectively. The side walls of the first frame wall portion 120 and the second frame wall portion 13 do not need to be provided with threaded holes extending along the second direction. In this way, the wall thickness of the first frame wall portion 120 and the second frame wall portion 130 in the second direction can be designed to be smaller, which can effectively reduce the manufacturing cost of the main body 100.

[0058] In some examples, such as Figures 3 to 5 , Figure 11 , Figure 13 and Figure 14 As shown, the decorative panel portion 110 has extruded insertion portions 112 at both ends on the back side in the first direction. The insertion portions 112 are arranged along the first direction. The third frame wall 210 and the fourth frame wall 220 are provided with insertion mating portions 280. The insertion portions 112 and the insertion mating portions 280 are inserted into each other along the first direction, so that the third frame wall 210 and the fourth frame wall 220 are fixedly connected to the decorative panel portion 110. This can better improve the flatness of the exposed surface of the decorative panel portion 110 and avoid local downward bulging of the exposed surface.

[0059] It can be, such as Figures 3 to 5 , Figure 11 , Figure 13 and Figure 14 As shown, the insertion part 112 is a protruding L-shaped insertion rib, and the insertion mating part 280 is an L-shaped slot; or the insertion part 112 can be a protruding T-shaped insertion rib, and the insertion mating part 280 can be a T-shaped slot, etc.; all of the above can achieve the purpose of this application, and their purpose has not departed from the design concept of this invention, and will not be elaborated here, and should all fall within the protection scope of this application.

[0060] The panel components provided in the embodiments of this application, such as Figures 16 to 21 As shown, the system includes a panel 600 and the return air grille described in any of the above embodiments. The front side of the panel 600 has a return air area 610 and an air outlet area 620. The return air area 610 has an air inlet. A decorative panel portion 110 covers the portion of the return air area 610 outside the air inlet, and the return air outlet 111 is opposite to the air inlet. This ducted air conditioner has fewer seams on its exposed surface, making it more aesthetically pleasing.

[0061] In some embodiments, such as Figure 16 , Figures 18 to 21 As shown, the inlet wall of the air inlet is provided with a first elastic fastener 630, a second elastic fastener, a third elastic fastener 640, and a hook-fitting part 650. The first elastic fastener 630 and the hook-fitting part 650 are located on opposite inlet walls of the return air inlet 111 in the second direction. The second elastic fastener and the third elastic fastener 640 are located on opposite inlet walls of the return air inlet 111 in the first direction. The extruded protrusion 123 of the first frame wall is engaged with the first elastic fastener 630. The third retaining rib of the third frame wall 210 is engaged with the second elastic fastener. The third retaining rib 270 of the fourth frame wall 220 is engaged with the third elastic fastener 640. The hook-fitting part 300 is movably connected to the hook-fitting part 650 (such as a hinged connection or a hook-fitting connection). By unscrewing the extruded protrusion 123 and the first elastic buckle 630, the third retaining rib and the second elastic buckle of the third frame wall 210, and the third retaining rib 270 and the third elastic buckle 640 of the fourth frame wall 220, the return air grille can be opened by swinging it downward on the panel 600. At this time, the end of the return air grille in the second direction is hooked onto the hooking mating part 650 through the hook connector 300. This solution makes the disassembly and assembly of the return air grille simpler.

[0062] The duct air conditioner provided in this application embodiment (not shown in the figure) includes a body and a panel assembly as described in any of the above embodiments, with the panel assembly located at the lower part of the body.

[0063] This duct unit possesses all the advantages of the panel assembly provided in any of the above embodiments, which will not be repeated here.

[0064] The air conditioner provided in this application embodiment (not shown in the figure) includes the ducted air conditioner described in any of the above embodiments.

[0065] This air conditioner possesses all the advantages of the ducted air conditioner provided in any of the above embodiments, which will not be repeated here.

[0066] In summary, the technical solution provided by the embodiments of this application mainly includes an integrally extruded decorative panel portion, a first frame wall portion, and a second frame wall portion. The first frame wall portion and the second frame wall portion are located on the back side of the decorative panel portion and are arranged opposite to each other in a second direction. The third frame wall and the fourth frame wall are located on the back side of the decorative panel portion and are arranged opposite to each other in a first direction. The two ends of the third frame wall in the second direction are fixedly connected to the first ends of the first frame wall portion and the first ends of the second frame wall portion in the first direction, respectively. The two ends of the fourth frame wall in the second direction are fixedly connected to the first frame wall portion. The second end of the first frame wall portion and the second end of the second frame wall portion in the first direction are fixedly connected one-to-one; in this scheme, the decorative panel portion, the first frame wall portion and the second frame wall portion are integrally extruded structures, so the production efficiency and assembly efficiency of the return air grille are higher, and it can meet the market's demand for size differentiation; moreover, the first frame wall portion, the second frame wall portion, the third frame wall portion and the fourth frame wall portion are all located on the back side of the decorative panel portion, and the front side of the decorative panel portion serves as the exposed surface of the return air grille. This exposed surface is a whole plane without splicing gaps, so the return air grille has better aesthetics.

[0067] In the description of this invention, it should be noted that the terms "upper", "lower", "one side", "the other side", "one end", "the other end", "side", "opposite", "four corners", "periphery", "square structure", 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 invention and simplifying the description, and do not indicate or imply that the structure referred to has a specific orientation, or is constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0068] In the description of the embodiments of the present invention, unless otherwise expressly specified and limited, the terms "connection," "direct connection," "indirect connection," "fixed connection," "installation," and "assembly" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. The terms "installation," "connection," and "fixed connection" can refer to a direct connection or an indirect connection through an intermediate medium, or they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention based on the specific circumstances.

[0069] While the embodiments disclosed in this invention are as described above, the content is merely for the purpose of facilitating understanding of the invention and is not intended to limit the invention. Any person skilled in the art to which this invention pertains may make any modifications and changes to the form and details of the implementation without departing from the spirit and scope disclosed herein; however, the scope of patent protection of this invention shall still be defined by the appended claims.

Claims

1. A return air grille, characterized in that, include: The main body includes a decorative panel portion, a first frame wall portion, and a second frame wall portion, which are integrally extruded and molded. The first frame wall portion and the second frame wall portion are located on the back side of the decorative panel portion and are arranged opposite to each other in the second direction. The decorative panel portion is provided with a return air vent, which is located between the first frame wall portion and the second frame wall portion in the second direction. and The third and fourth frame walls are located on the back side of the decorative panel portion and are arranged opposite to each other in the first direction. The return air vent is located between the third and fourth frame walls in the first direction, and the first direction and the second direction intersect. Wherein, the two ends of the third frame wall in the second direction are fixedly connected to the first ends of the first frame wall portion in the first direction and the first ends of the second frame wall portion in the first direction, respectively; and the two ends of the fourth frame wall in the second direction are fixedly connected to the second ends of the first frame wall portion in the first direction and the second ends of the second frame wall portion in the first direction, respectively.

2. The return air grille according to claim 1, characterized in that, Also includes: A grille bracket extends across the return air vent along the second direction on the back side of the decorative panel portion and is fixedly connected to the first frame wall portion and the second frame wall portion; A grille strip is located between the return air inlet and the grille support, and is arranged along the first direction, and the grille strip is fixedly connected to the grille support.

3. The return air grille according to claim 2, characterized in that, The grid strips are made by extrusion molding, and the grid support, the third frame wall and the fourth frame wall are made by injection molding.

4. The return air grille according to claim 2, characterized in that, The third frame wall and the fourth frame wall are provided with limiting grooves on their opposite sides, and the two ends of the grid strip in the first direction are positioned in the limiting grooves one by one.

5. The return air grille according to any one of claims 2 to 4, characterized in that: The first frame wall portion has a first extrusion groove that extends through the first direction, the opening of the first extrusion groove facing away from the decorative panel portion, the inner side of the first extrusion groove has a second extrusion groove that extends through the first direction, the outer side of the first extrusion groove facing away from the second frame wall portion has an extrusion protrusion arranged along the first direction, the extrusion protrusion is configured to snap into the panel, and the first frame wall portion also has an installation notch that extends through the second direction. The second frame wall portion has an extrusion hole extending in the first direction and an extrusion rib arranged along the first direction. The extrusion hole is located between the extrusion rib and the decorative panel portion. The side of the extrusion rib facing the first frame wall portion has a third extrusion groove extending in the first direction. The second frame wall portion also has a threaded hole extending in the second direction. The mounting notch and the threaded hole are opposite to each other in the second direction.

6. The return air grille according to claim 5, characterized in that, Also includes: The mounting bracket is located on the side of the first frame wall portion facing away from the second frame wall portion and is fixed to the mounting notch at one end of the grid bracket in the second direction by a first screw, and the other end of the grid bracket in the second direction is fixed to the screw hole by a second screw.

7. The return air grille according to claim 6, characterized in that: The third frame wall and the fourth frame wall are provided with a first insert, a second insert, and a third insert on opposite sides, and a third retaining rib on opposite sides. The first insert is inserted into the through end of the second extrusion groove, the second insert is inserted into the extrusion hole, and the third insert is inserted into the through end of the third extrusion groove. The third retaining rib is configured to be engaged with the same panel. The grid bracket has a fourth insert and a first retaining rib at one end in the second direction. The fourth insert is inserted into the mounting notch, and the first retaining rib is engaged in the second extrusion groove. The first screw passes through the hook and is screwed onto the fourth insert. The other end of the grid bracket in the second direction has an abutment surface and a second retaining rib. The abutment surface abuts against the outer end face of the bolt hole facing the first frame wall. The second retaining rib is engaged in the third extrusion groove, and the second screw passes through the bolt hole and is screwed onto the abutment surface.

8. The return air grille according to any one of claims 1 to 4, characterized in that, The first frame wall portion and the second frame wall portion are both cut off at both ends of the back side of the decorative panel portion in the first direction. The third frame wall and the fourth frame wall are located at both ends of the back side of the decorative panel portion in the first direction. The ends of the third frame wall and the ends of the fourth frame wall in the second direction are located at the avoidance sections.

9. The return air grille according to claim 8, characterized in that, The decorative panel portion has extruded insertion parts at both ends on the back side in the first direction. The insertion parts are arranged along the first direction. The third frame wall and the fourth frame wall have insertion mating parts. The insertion parts and the insertion mating parts are inserted into each other along the first direction.

10. A panel assembly, characterized in that, The panel includes a return air grille as described in any one of claims 1 to 9, the front side of the panel having a return air area and an air outlet area, the return air area having an air inlet, the decorative panel partially covering the portion of the return air area outside the air inlet, the return air inlet being opposite to the air inlet.

11. The panel assembly according to claim 10, characterized in that, The air inlet wall is provided with a first elastic fastener, a second elastic fastener, a third elastic fastener, and a hook-fitting part. The first elastic fastener and the hook-fitting part are located on the opposite inlet wall of the return air inlet. The extruded protrusion of the first frame wall portion is engaged with the first elastic fastener. The third retaining rib of the third frame wall is engaged with the second elastic fastener. The third retaining rib of the fourth frame wall is engaged with the third elastic fastener. The hook-fitting part is movably connected to the hook-fitting part.

12. A ducted air conditioner, characterized in that, Includes the panel assembly as described in claim 10 or 11.

13. An air conditioner, characterized in that, Including the duct unit as described in claim 12.

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