Air return assembly, air conditioner indoor unit and air conditioner

Abstract

The present disclosure relates to a return air assembly, an air conditioner indoor unit and an air conditioner. The return air assembly comprises a return air frame, a first clamping member movably connected with the return air frame, a grid frame provided with a second clamping member, the first clamping member being capable of forming a connected state and a disengaged state through movement, and a filter member arranged between the grid frame and the return air frame. In the connected state, the first clamping member connects the second clamping member, so that the return air frame and the grid frame are connected. In the disengaged state, the first clamping member is disengaged from the second clamping member, so that the return air frame and the grid frame are disengaged. One of the return air frame and the grid frame is provided with a positioning column, and the other of the return air frame and the grid frame is provided with a positioning hole. The positioning column passes through the positioning hole to position the return air frame and the grid frame. The return air assembly provided by the present disclosure has a simple structure and is convenient and fast to disassemble and assemble.

Description

Technical Field

[0001] This disclosure relates to the field of air conditioning technology, and more particularly to a return air assembly, an indoor air conditioning unit, and an air conditioner. Background Technology

[0002] In related technologies, return air components are used to draw in airflow and exchange heat with it to achieve cooling or heating. However, over time, these components accumulate dust, lint, or oil, necessitating regular disassembly, cleaning, and replacement to maintain their return air efficiency. Therefore, improving the disassembly and assembly efficiency of return air components is a problem that needs to be addressed. Summary of the Invention

[0003] To overcome the problems existing in the related technologies, this disclosure provides a return air assembly, an indoor air conditioning unit, and an air conditioner.

[0004] According to a first aspect of this disclosure, a return air assembly is provided, the return air assembly comprising: Return air frame; The first fastener is movably connected to the return air frame; A grid frame, wherein the grid frame is provided with a second snap-fit ​​member; the first snap-fit ​​member can be moved to form a connected state and a disconnected state. A filter element is disposed between the grille frame and the return air frame; In the connected state, the first snap-fit ​​connector connects to the second snap-fit ​​connector, thereby connecting the return air frame and the grille frame. In the disengaged state, the first snap-fit ​​component is disconnected from the second snap-fit ​​component, causing the return air frame and the grille frame to become disconnected. One of the return air frame and the grille frame is provided with a positioning post, and the other of the return air frame and the grille frame is provided with a positioning hole. The positioning post passes through the positioning hole to position the return air frame and the grille frame.

[0005] In this embodiment, the return air assembly can achieve pre-positioning of the grille frame and return air frame through the insertion and engagement of the positioning pin and positioning hole, thereby improving the assembly accuracy of the grille frame and return air frame and making the assembly faster. The movable engagement of the first snap-fit ​​and the second snap-fit ​​simplifies the connection structure between the return air frame and the grille frame, and the disassembly and assembly operations of the return air frame and the grille frame can be realized without the need for disassembly and assembly tools, thereby improving the disassembly and assembly efficiency of the return air assembly and making disassembly and assembly more convenient.

[0006] In some embodiments of this disclosure, one of the first and second snap-fit ​​members is provided with a first protrusion; the other of the first and second snap-fit ​​members is provided with a second protrusion or a slot. In the connected state, the first protrusion engages with the second protrusion or the slot to connect the first and second snap-fit ​​members. This design, through the snap-fit ​​cooperation of the first protrusion and the second protrusion or the slot, can further improve the connection stability between the first and second snap-fit ​​members, thereby ensuring the connection reliability between the return air frame and the grille frame, and avoiding noise and reduced return air efficiency due to loose connections.

[0007] In some embodiments of this disclosure, the first snap-fit ​​member includes a first snap-fit ​​portion, the first snap-fit ​​portion being provided with a first protrusion, and the second snap-fit ​​member includes a second snap-fit ​​portion, the second snap-fit ​​portion being provided with a second protrusion on the side near the first snap-fit ​​portion. In the connected state, the first protrusion is located on the side of the second protrusion near the grille frame to restrict the grille frame from moving away from the return air frame by the second protrusion, and is connected to the grille frame. In the disengaged state, the first snap-fit ​​component moves toward the return air frame, causing the first protrusion to be on the side of the second protrusion away from the grille frame, thus disengaging from the grille frame.

[0008] In this embodiment, the first snap-fit ​​component is moved to change the relative position of the first protrusion and the second protrusion of the first snap-fit ​​component, thereby enabling the first snap-fit ​​component to switch between the connected state and the disconnected state. The structure is simple, reduces the difficulty of disassembling and assembling the return air component, and makes it easier to assemble, clean and maintain the return air component.

[0009] In some embodiments of this disclosure, the return air frame is provided with a receiving hole, the receiving hole is provided on the side of the return air frame close to the grille frame, and the first snap-fit ​​member further includes a pressing part, the pressing part is connected to the end of the first snap-fit ​​member away from the return air frame and is slidably disposed in the receiving hole; The pressing part is provided with a blocking member, which can abut against the edge of the receiving hole to prevent the first snap-fit ​​member from disengaging from the grille frame in a direction away from the return air frame.

[0010] In this embodiment, the pressing part is slidably disposed in the receiving hole, so that the receiving hole plays a limiting role on the pressing part, thereby guiding the movement trajectory of the first snap-fit ​​member, preventing the first snap-fit ​​member from deviating during movement, ensuring that the first protrusion and the second protrusion are stably snapped together, and the blocking member, by abutting against the edge of the receiving hole, can effectively limit the first snap-fit ​​member from moving excessively away from the return air frame, preventing the first snap-fit ​​member from detaching from the receiving hole and the return air frame, and ensuring the reliability of the return air assembly.

[0011] In some embodiments of this disclosure, the second snap-fit ​​member includes at least two second snap-fit ​​portions located on both sides of the receiving hole. The first snap-fit ​​member includes at least two first snap-fit ​​portions located inside the at least two second snap-fit ​​portions and corresponding to each of the second snap-fit ​​portions. In the connected state, each first snap-fit ​​portion snaps into each of the second snap-fit ​​portions. This design facilitates a clamping effect after the at least two second snap-fit ​​portions snap into the first snap-fit ​​portions, thereby improving the stability of the first snap-fit ​​member after snap-fitting with the second snap-fit ​​member.

[0012] In some embodiments of this disclosure, the first snap-fit ​​portion includes a support member and a limiting member disposed opposite to each other. One end of the support member and the limiting member is connected to the pressing portion, and the other end of the support member and the limiting member are connected to each other. A cavity for deformation of the support member is formed between the support member and the limiting member, and the first protrusion is disposed on the limiting member.

[0013] In this embodiment, a cavity is formed between the support member and the limiting member to allow the support member to deform, so that the support member can undergo elastic deformation. This helps to reduce the force between the limiting member and the second protrusion when they are pressed against each other, and prevents the limiting member from being subjected to excessive force and breaking. This makes the movement of the first snap-fit ​​member smoother.

[0014] In some embodiments of this disclosure, the return air frame further includes a limiting portion. In the disengaged state, the limiting portion is at least partially located on the side of the first latching member away from the second latching member, to prevent the first latching member from moving away from the grille frame. This design ensures that the limiting portion can prevent the first latching member from moving excessively away from the grille frame in the disengaged state, avoiding the first latching member from disengaging from the receiving hole due to excessive pressure from the user, thus ensuring the reliability of the return air assembly.

[0015] In some embodiments of this disclosure, the return air frame further includes a limiting groove disposed on the side of the return air frame away from the grille frame. The first snap-fit ​​member includes a first end and a second end disposed opposite to each other along a first direction. The first end of the first snap-fit ​​member is inserted into the limiting groove, and the limiting groove is used to limit the movement of the first snap-fit ​​member along the first direction, which is the direction in which the first snap-fit ​​member switches movement between the connected state and the disconnected state. The grille frame is provided with a limiting hole, and in the connected state, the second end of the first snap-fit ​​member is inserted into the limiting hole. This design allows the limiting groove to guide and constrain the first end of the first snap-fit ​​member, thereby limiting the first snap-fit ​​member to move linearly back and forth along the first direction, preventing the first snap-fit ​​member from shaking during movement, making the switching of the first snap-fit ​​member between the connected state and the disconnected state more precise, and improving the smoothness of the assembly and disassembly of the return air assembly.

[0016] In some embodiments of this disclosure, an elastic portion is connected to the end of the first snap-fit ​​member away from the grille frame. The two ends of the elastic portion abut against the return air frame and the first snap-fit ​​member, respectively. The elastic portion applies an elastic force towards the grille frame to the first snap-fit ​​member, thereby engaging the first snap-fit ​​member with the second snap-fit ​​member. This design, by providing an elastic portion at the end of the first snap-fit ​​member, utilizes the elastic force generated by the compression deformation of the elastic portion to act on the first snap-fit ​​member, achieving a stable engagement between the first and second snap-fit ​​members without requiring manual locking by the user, making the assembly and disassembly of the return air assembly simpler and less strenuous.

[0017] In some embodiments of this disclosure, the grid frame is further provided with a reinforcing portion, which is spaced apart from the second snap-fit ​​member. The end of the reinforcing portion away from the grid frame is connected to the end of the second snap-fit ​​member away from the grid frame, so as to improve the structural strength of the second snap-fit ​​member by connecting the reinforcing portion to the second snap-fit ​​member, avoid the second snap-fit ​​member from being squeezed by the first snap-fit ​​member during the movement of the first snap-fit ​​member, and improve the service life of the first snap-fit ​​member.

[0018] According to a second aspect of this disclosure, an air conditioning indoor unit is provided, the air conditioning indoor unit including the return air assembly as described above.

[0019] The return air assembly of the indoor air conditioning unit in this embodiment is easy to disassemble and assemble, which helps to save cleaning and maintenance time of the indoor air conditioning unit and improve maintenance and repair efficiency.

[0020] According to a third aspect of this disclosure, an air conditioner is provided, the air conditioner comprising an outdoor unit and an indoor unit as described above.

[0021] The air conditioner in this embodiment has a return air assembly, which makes it easier to disassemble and assemble the return air assembly, and helps to improve the maintenance and repair efficiency of the air conditioner.

[0022] The technical solutions provided by the embodiments of this disclosure may include the following beneficial effects: The return air assembly disclosed herein includes a return air frame, a first snap-fit ​​component movably connected to the return air frame, a filter element, and a grille frame equipped with a second snap-fit ​​component. One of the return air frame and the grille frame is provided with a positioning post, and the other is provided with a positioning hole. Through the insertion and engagement of the positioning post and the positioning hole, pre-positioning of the grille frame and the return air frame during assembly can be achieved, improving the assembly accuracy of the grille frame and the return air frame, making assembly faster, and avoiding misalignment problems. The first snap-fit ​​component has a connected state and a disengaged state, facilitating the connection and separation of the return air frame and the grille frame, simplifying the connection structure of the return air frame and the grille frame, and enabling disassembly and assembly operations of the return air frame and the grille frame without the need for disassembly and assembly tools, thus improving the efficiency of disassembly and assembly of the return air assembly and making disassembly and assembly more convenient.

[0023] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0024] The accompanying drawings, which are incorporated in and form a part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure.

[0025] Figure 1 This is a schematic diagram of the structure of a return air assembly according to an exemplary embodiment; Figure 2 This is a split schematic diagram of a return air assembly according to an exemplary embodiment; Figure 3 This is a schematic diagram of the mounting position of the first snap-fit ​​component according to an exemplary embodiment. Figure 1 ; Figure 4 This is a schematic diagram of the structure of a grid frame according to an exemplary embodiment; Figure 5 This is a schematic diagram of the mounting position of the first snap-fit ​​component according to an exemplary embodiment. Figure 2 ; Figure 6 yes Figure 5 Enlarged view of section A; Figure 7 This is a cross-sectional view of the first snap-fit ​​member according to an exemplary embodiment; Figure 8 This is a schematic diagram illustrating the connection state of the first connector according to an exemplary embodiment; Figure 9 This is a schematic diagram illustrating the disengaged state of the first snap-fit ​​member according to an exemplary embodiment; Figure 10This is an assembly schematic diagram of a return air assembly according to an exemplary embodiment; Figure 11 yes Figure 10 Enlarged view of section B.

[0026] In the diagram: 1. Return air frame; 11. Receiving hole; 12. Limiting part; 13. Limiting groove; 14. Positioning hole; 2. First snap-fit ​​part; 21. First snap-fit ​​part; 211. First protrusion; 212. Limiting part; 213. Supporting part; 22. Pressing part; 23. Blocking part; 3. Grille frame; 31. Limiting hole; 32. Positioning post; 4. Second snap-fit ​​part; 41. Second snap-fit ​​part; 411. Second protrusion; 5. Elastic part; 6. Filter part; 7. Reinforcing part. Detailed Implementation

[0027] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this disclosure. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this disclosure as detailed in the appended claims.

[0028] An exemplary embodiment of this disclosure provides a return air assembly, such as Figures 1-3 As shown, the return air assembly is used to draw in airflow and exchange heat with the airflow through a heat exchange device. Exemplarily, the return air assembly can be applied to air conditioning equipment. The return air assembly includes a return air frame 1, a first snap-fit ​​member 2, a filter 6, and a grille frame 3. Both the return air frame 1 and the grille frame 3 are provided with spaced-apart grilles, and grille holes are formed between adjacent grilles. The return airflow flows into the interior of the return air assembly through the grille holes on the grille frame 3 and the return air frame 1. The grille frame 3 is located on the windward side of the return airflow relative to the return air frame 1, meaning the return airflow passes through the grille frame 3 and the return air frame 1 successively to flow into the interior of the return air assembly.

[0029] The first snap-fit ​​connector 2 is movably connected to the return air frame 1. Exemplarily, the first snap-fit ​​connector 2 can slide relative to the return air frame 1, or it can rotate relative to the return air frame 1. The grille frame 3 is provided with a second snap-fit ​​connector 4, which is connected to the grille frame 3. The first snap-fit ​​connector 2 can connect to the second snap-fit ​​connector 4, thereby connecting the grille frame 3 to the return air frame 1. Exemplarily, the connection between the first snap-fit ​​connector 2 and the second snap-fit ​​connector 4 is a snap-fit ​​connection. The first snap-fit ​​connector 2 moves under external force. This external force can be a force directly applied to the first snap-fit ​​connector 2 by the user, or a force applied to the grille frame 3 by the user, causing the grille frame 3 to push and squeeze the first snap-fit ​​connector 2 against the return air frame 1, and the reaction force exerted by the return air frame 1 on the grille frame 3.

[0030] like Figure 2 As shown, the filter element 6 is positioned between the grille frame 3 and the return air frame 1. The grille frame 3 and the return air frame 1 clamp and limit the filter element 6, preventing it from falling off. The filter element 6 is configured as a filter screen or filter cotton. It is used to filter dust, lint, and other impurities from the air flowing through the return air assembly, which helps purify the air entering the return air assembly, improving the cleanliness of the return air assembly and its heat exchange capacity for the return airflow.

[0031] like Figure 8 and Figure 9 As shown, the first connector 2 has a connected state and a disconnected state. In the connected state, the first connector 2 connects to the second connector 4, connecting the return air frame 1 and the grille frame 3. In the disconnected state, the first connector 2 disconnects from the second connector 4, disconnecting the return air frame 1 and the grille frame 3. The first connector 2 can switch from the connected state to the disconnected state by moving relative to the return air frame 1.

[0032] like Figure 2 and Figures 10-11 As shown, one of the return air frame 1 and the grille frame 3 is provided with a positioning post 32, and the other of the return air frame 1 and the grille frame 3 is provided with a positioning hole 14. The positioning post 32 passes through the positioning hole 14 to position the return air frame 1 and the grille frame 3. For example, the return air frame 1 may be provided with a positioning post 32 and the grille frame 3 may be provided with a positioning hole 14; alternatively, the return air frame 1 may be provided with a positioning post 32 and a positioning hole 14, and the grille frame 3 may also be provided with a positioning post 32 and a positioning hole 14. The positioning post 32 on the grille frame 3 is adapted to the positioning hole 14 on the return air frame 1, and the positioning hole 14 on the grille frame 3 is adapted to the positioning post 32 on the return air frame 1. Taking the grille frame 3 being provided with a positioning post 32 and the return air frame 1 being provided with a positioning hole 14 as an example, the number of positioning posts 32 is four. The four positioning posts 32 can be set around the grille frame 3 or on opposite sides of the grille frame 3. There are four positioning holes 14. The four positioning holes 14 are set on the return air frame 1, and their positions correspond to the positions of the four positioning posts 32.

[0033] In this embodiment, the return air assembly includes a return air frame 1, a first snap-fit ​​member 2 movably connected to the return air frame 1, and a grille frame 3 equipped with a second snap-fit ​​member 4. One of the return air frame 1 and the grille frame 3 is provided with a positioning post 32, and the other of the return air frame 1 and the grille frame 3 is provided with a positioning hole 14. Through the insertion and engagement of the positioning post 32 and the positioning hole 14, the pre-positioning of the grille frame 3 and the return air frame 1 can be achieved, improving the assembly accuracy of the grille frame 3 and the return air frame 1, making the assembly faster, and avoiding misalignment problems during assembly. The first snap-fit ​​member 2 can be movably switched from a connected state to a disconnected state, thereby realizing the connection and separation of the return air frame 1 and the grille frame 3. In the connected state, the first snap-fit ​​member 2 connects to the second snap-fit ​​member 4, connecting the return air frame 1 and the grille frame 3. In the disengaged state, the first snap-fit ​​2 disengages from the second snap-fit ​​4, causing the return air frame 1 and the grille frame 3 to disconnect. The return air assembly simplifies the connection structure between the return air frame 1 and the grille frame 3 through the movable snap-fit ​​between the first snap-fit ​​2 and the second snap-fit ​​4. Compared with the fastener connection method, the return air frame 1 and the grille frame 3 can be disassembled and assembled without the need for disassembly and assembly tools, which improves the disassembly and assembly efficiency of the return air assembly and makes disassembly and assembly more convenient.

[0034] In some embodiments, such as Figures 4-6 As shown, one of the first latching member 2 and the second latching member 4 is provided with a first protrusion 211, and the other of the first latching member 2 and the second latching member 4 is provided with a second protrusion 411 or a slot. In the connected state, the first protrusion 211 and the second protrusion 411 or the slot engage to connect the first latching member 2 and the second latching member 4. For example, the first latching member 2 may be provided with the first protrusion 211, and the second latching member 4 may be provided with the second protrusion 411 or the slot; alternatively, the second latching member 4 may be provided with the first protrusion 211, and the first latching member 2 may be provided with the second protrusion 411 or the slot. This configuration, through the engaging action of the first protrusion 211 and the second protrusion 411 or the slot, can further improve the connection stability between the first latching member 2 and the second latching member 4, thereby ensuring the connection reliability between the return air frame 1 and the grille frame 3, and avoiding noise and reduced return air efficiency due to loose connections.

[0035] In some embodiments, such as Figures 8-9 As shown, the first snap-fit ​​member 2 includes a first snap-fit ​​portion 21, which is provided with a first protrusion 211. The second snap-fit ​​member 4 includes a second snap-fit ​​portion 41, which is provided with a second protrusion 411 on the side of the second snap-fit ​​portion 41 close to the first snap-fit ​​portion 21. The protrusion direction of the first protrusion 211 is opposite to the protrusion direction of the matching second protrusion 411, that is, the first protrusion 211 protrudes toward the second protrusion 411, and the second protrusion 411 protrudes toward the first protrusion 211, which is conducive to the first protrusion 211 and the second protrusion 411 snapping together.

[0036] like Figure 8 As shown, in the connected state, the first protrusion 211 is located on the side of the second protrusion 411 near the grille frame 3 to restrict the movement of the grille frame 3 away from the return air frame 1, thus connecting with the grille frame 3. Specifically, in the connected state, the first protrusion 211 is located on the side of the second protrusion 411 near the grille frame 3, and the first protrusion 211 engages with the second protrusion 411 to restrict the movement of the grille frame 3 away from the return air frame 1, thereby connecting the first protrusion 211 with the grille frame 3. When the grille frame 3 tends to move away from the return air frame 1, the first protrusion 211 abuts against the second protrusion 411 to hinder the movement of the second protrusion 411 and the grille frame 3, ensuring that the grille frame 3 always remains connected to the return air frame 1.

[0037] like Figure 9 As shown, in the disengaged state, the first latching member 2 moves towards the return air frame 1, causing the first protrusion 211 to be on the side of the second protrusion 411 away from the grille frame 3, thus disengaging from the grille frame 3. That is, by moving towards the return air frame 1, the first protrusion 211 is positioned on the side of the second protrusion 411 away from the grille frame 3, so that the first protrusion 211 no longer restricts the second protrusion 411. At this time, the second protrusion 411 is disengaged from the first protrusion 211, the first protrusion 211 is disengaged from the grille frame 3, and the first latching member 2 is in the disengaged state.

[0038] In this embodiment, when installing the grille frame 3, the grille frame 3 drives the second snap-fit ​​member 4 to move towards the return air frame 3 and snaps into the first snap-fit ​​member 2 until the second protrusion 411 of the second snap-fit ​​member 4 moves to the side of the first protrusion 211 away from the grille frame 3, so that the first snap-fit ​​member 2 is in a connected state, so that the first protrusion 211 can limit the second protrusion 411 and prevent the grille frame 3 from moving away from the return air frame 1. When the grille frame 3 needs to be disassembled, the first snap-fit ​​part 2 is pressed to move it away from the grille frame 3 until the first protrusion 211 of the first snap-fit ​​part 2 moves to the side of the second protrusion 411 away from the grille frame 3, so that the first snap-fit ​​part 2 and the second snap-fit ​​part 4 are disengaged. At this time, the first snap-fit ​​part 2 is in the disengaged state. By moving the first snap-fit ​​part 2, the relative position of the first protrusion 211 and the second protrusion 411 of the first snap-fit ​​part 21 is changed, thereby realizing the switching of the first snap-fit ​​part 2 from the connected state to the disengaged state. The structure is simple, reduces the difficulty of disassembling and assembling the return air component, and makes it easier to assemble, clean and maintain the return air component.

[0039] In some embodiments, such as Figures 5-6As shown, the return air frame 1 is provided with a receiving hole 11, which is located on the side of the return air frame 1 near the grille frame 3, that is, the receiving hole 11 is located on the windward side of the return airflow path of the return air frame 1. The first latching member 2 also includes a pressing part 22. The user can apply external force to the pressing part 22 by pressing it, thereby driving the first latching member 2 to move. The pressing part 22 is connected to the end of the first latching member 21 away from the return air frame 1 and is slidably disposed in the receiving hole 11. For example, the shape of the pressing part 22 is adapted to the shape of the receiving hole 11. The setting of the pressing part 22 also helps to increase the contact area when the user applies force to the first latching member 2, making it easier to press the first latching member 2.

[0040] The pressing part 22 is provided with a blocking member 23. In the projection of the first latching member 2 in the moving direction, the blocking member 23 protrudes from the pressing part 22 and extends in a direction away from the pressing part 22. The blocking member 23 can abut against the edge of the receiving hole 11 to prevent the first latching member 2 from disengaging from the grille frame 3 in a direction away from the return air frame 1.

[0041] In this embodiment, the pressing part 22 is slidably disposed in the receiving hole 11, so that the receiving hole 11 plays a limiting role on the pressing part 22, thereby guiding the movement trajectory of the first snap-fit ​​part 2, preventing the first snap-fit ​​part 2 from deviating during movement, ensuring that the first protrusion 211 and the second protrusion 411 are stably snapped together, and the blocking part 23, by abutting against the edge of the receiving hole 11, can effectively limit the first snap-fit ​​part 2 from moving excessively away from the return air frame 1, preventing the first snap-fit ​​part 2 from detaching from the receiving hole 11 and the return air frame 1, thus ensuring the reliability of the return air assembly.

[0042] In some embodiments, such as Figures 2-6 As shown, the second latching member 4 includes at least two second latching portions 41, located on both sides of the receiving hole 11. The second protrusions 411 of the at least two second latching portions 41 have opposite protrusion directions. For example, the second protrusions 411 of the at least two second latching portions 41 can be arranged facing each other or facing away from each other. The first latching member 2 includes at least two first latching portions 21, both of which are connected to the pressing portion 22. The at least two first latching portions 21 are located inside the at least two second latching portions 41 and correspond to each of the second latching portions 41. In the connected state, each first latching portion 21 latches with each second latching portion 41. This design is beneficial because it allows the at least two second latching portions 41 to form a clamping effect after latching with the first latching portions 21, thus improving the stability of the first latching member 2 and the second latching member 4 after latching.

[0043] In some embodiments, such as Figures 6-9As shown, the first latching portion 21 includes a support member 213 and a limiting member 212 disposed opposite to each other. One end of the support member 213 and the limiting member 212 is connected to the pressing portion 22, and the other ends of the support member 213 and the limiting member 212 are connected to each other. The support member 213 is connected to the limiting member 212, which can enhance the structural strength of the limiting member 212 and improve its deformation capability. A cavity is formed between the support member 213 and the limiting member 212 to allow the support member 213 to deform, so that the support member 213 can generate elastic deformation, thereby driving the limiting member 212 to move between the side of the second protrusion 411 near the grid frame 3 and the side of the second protrusion 411 away from the grid frame 3. The first protrusion 211 is disposed on the limiting member 212. At least part of the extension direction of the support member 213 is set at an angle relative to the moving direction of the first latching member 2 to improve the deformation capability of the support member 213. For example, the first protrusion 211 constitutes at least part of the limiting member 212. When the limiting member 212 moves from the side of the second protrusion 411 close to the grid frame 3 to the side of the second protrusion 411 away from the grid frame 3, the first latching member 2 is initially in a connected state, used to press the first latching member 2 to push the first latching member 2 to move away from the grid frame 3 and abut against the second protrusion 411. At this time, the support member 213 generates elastic deformation to reduce the mutual squeezing force between the first latching member 2 and the second protrusion 411. The first protrusion 211 of the first latching member 2 remains in contact with the second protrusion 411 and gradually moves to the side of the second protrusion 411 away from the grid frame 3 until the first latching member 2 reaches the disengaged state.

[0044] In this embodiment, a cavity is formed between the support member 213 and the limiting member 212 to allow the support member 213 to deform, so that the support member 213 can undergo elastic deformation. This helps to reduce the force between the limiting member 212 and the second protrusion 411 when they are pressed against each other, and prevents the limiting member 212 from being subjected to excessive force and breaking. This makes the movement of the first snap-fit ​​member 2 smoother.

[0045] In some embodiments, such as Figures 6-9 As shown, the return air frame 1 also includes a limiting part 12. In the disengaged state, the limiting part 12 is at least partially located on the side of the first latching member 2 away from the second latching member 4, to prevent the first latching member 2 from moving away from the grille frame 3. Exemplarily, a gap is provided between the limiting part 12 and the first latching member 2, and the limiting part 12 at least partially overlaps with the first protrusion 211 in the projection of the first latching member 2's movement direction. In the disengaged state, the limiting part 12 can be configured to extend from the side of the first latching member 2 away from the grille frame 3 towards the side closer to the grille frame 3. This design allows the limiting part 12 to prevent the first latching member 2 from moving excessively away from the grille frame 3 in the disengaged state, avoiding the first latching member 2 from disengaging from the receiving hole 11 due to excessive pressure from the user, thus ensuring the reliability of the return air assembly.

[0046] In some embodiments, such as Figure 6 and Figure 7 As shown, the return air frame 1 also includes a limiting groove 13. The limiting groove 13 is disposed on the side of the return air frame 1 away from the grille frame 3. The limiting groove 13 and the receiving hole 11 are disposed opposite each other on both sides of the return air frame 1, and the opening of the limiting groove 13 faces the receiving hole 11. The first snap-fit ​​member 2 includes a first end and a second end disposed opposite each other along a first direction. The first end of the first snap-fit ​​member 2 is inserted into the limiting groove 13. The limiting groove 13 is used to limit the movement of the first snap-fit ​​member 2 along the first direction. The first direction is the direction in which the first snap-fit ​​member 2 switches between the connected state and the disconnected state. It should be noted that moving along the first direction refers to reciprocating movement along a straight line parallel to the first direction, such as... Figure 7 As shown, the first direction is parallel to the X-axis.

[0047] like Figure 2 and Figure 6 As shown, the grille frame 3 is provided with a limiting hole 31, which, exemplarily, corresponds to the receiving hole 11 of the return air frame 1. In the connected state, the second end of the first snap-fit ​​member 2 passes through the receiving hole 11 and is inserted into the limiting hole 31. This design allows the limiting groove 13 to guide and constrain the first end of the first snap-fit ​​member 2, thereby limiting the first snap-fit ​​member 2 to move linearly back and forth along the first direction, preventing the first snap-fit ​​member 2 from shaking during movement, making the switching between the connected and disconnected states of the first snap-fit ​​member 2 more precise, and improving the smoothness of the disassembly and assembly of the return air assembly.

[0048] In some embodiments, such as Figure 6 As shown, the end of the first snap-fit ​​member 2 furthest from the grille frame 3 is connected to an elastic part 5. That is, the elastic part 5 is disposed at the first end of the first snap-fit ​​member 2, and is sleeved around the periphery of the first end of the first snap-fit ​​member 2. The two ends of the elastic part 5 abut against the return air frame 1 and the first snap-fit ​​member 2, respectively. The elastic part 5 applies an elastic force pointing towards the grille frame 3 to the first snap-fit ​​member 2, causing the first snap-fit ​​member 2 to snap into contact with the second snap-fit ​​member 4. For example, the elastic part 5 can be a spring or elastic rubber. When the first snap-fit ​​member 2 is initially in a disengaged state, the user pushes the grille frame 3 towards the return air frame 1, causing the second snap-fit ​​member 4 to press against the first snap-fit ​​member 2. The elastic part 5 is compressed, and it applies an elastic force pointing towards the grille frame 3 to the first snap-fit ​​member 2, causing the first snap-fit ​​member 2 to overcome the friction between itself and the second snap-fit ​​member 4 and move to a connected state, thereby achieving the assembly of the return air assembly. When the first connector 2 is initially in the connected state, the user presses the first connector 2 and moves it towards the return air frame 1, causing the first connector 2 to disengage from the second connector 4 and move to the disengaged state, thereby realizing the disassembly of the return air assembly.

[0049] In this embodiment, by providing an elastic part 5 at the end of the first snap-fit ​​2, the elastic force generated by the compression deformation of the elastic part 5 acts on the first snap-fit ​​2, which can realize the stable engagement of the first snap-fit ​​2 and the second snap-fit ​​4 without the need for manual locking by the user, making the disassembly and assembly of the return air assembly simpler and less strenuous.

[0050] In some embodiments, such as Figure 2 As shown, the return air assembly also includes a filter element 6, which is disposed between the grille frame 3 and the return air frame 1. The grille frame 3 and the return air frame 1 clamp and limit the filter element 6, preventing it from falling off. The filter element 6 is configured as a filter screen or filter cotton, and it is used to filter dust, lint, and other impurities from the air flowing through the return air assembly. This helps purify the air entering the return air assembly, improving its cleanliness and heat exchange capacity.

[0051] In some embodiments, such as Figure 4 As shown, the grid frame 3 is also provided with a reinforcing part 7. One end of the reinforcing part 7 is connected to the grid frame 3, and the reinforcing part 7 is spaced apart from the second snap-fit ​​member 4. The end of the reinforcing part 7 away from the grid frame 3 is connected to the end of the second snap-fit ​​member 4 away from the grid frame 3. The spaced-apart arrangement between the end of the reinforcing part 7 connected to the grid frame 3 and the second snap-fit ​​member 4 facilitates the connection between the reinforcing part 7 and the second snap-fit ​​member 4, thereby improving the structural strength of the second snap-fit ​​member 4 and preventing it from breaking due to compression by the first snap-fit ​​member 2 during the movement of the first snap-fit ​​member 2, thus extending the service life of the first snap-fit ​​member 2.

[0052] An embodiment of this disclosure also provides an air conditioning indoor unit, which includes a return air assembly, which is the return air assembly described above. The return air assembly is used to draw in airflow so that the heat exchange device can exchange heat with the airflow, thereby achieving cooling or heating of the air.

[0053] The return air assembly of the indoor air conditioning unit in this embodiment is easy to disassemble and assemble, which helps to save cleaning and maintenance time of the indoor air conditioning unit and improve maintenance and repair efficiency.

[0054] An embodiment of this disclosure also provides an air conditioner, which includes an outdoor unit and an indoor unit as described above. For example, the air conditioner may be a kitchen air conditioner.

[0055] The air conditioner in this embodiment has a return air assembly, which makes it easier to disassemble and assemble the return air assembly, and helps to improve the maintenance and repair efficiency of the air conditioner.

[0056] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the following claims.

[0057] It should be understood that this disclosure is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this disclosure is limited only by the appended claims.

Claims

1. A return air assembly, characterized in that, include: Return air frame; The first fastener is movably connected to the return air frame; A grid frame, wherein the grid frame is provided with a second snap-fit ​​component; The first connector has a connected state and a disconnected state; A filter element is disposed between the grille frame and the return air frame; In the connected state, the first snap-fit ​​connector connects to the second snap-fit ​​connector, thereby connecting the return air frame and the grille frame. In the disengaged state, the first snap-fit ​​component is disconnected from the second snap-fit ​​component, causing the return air frame and the grille frame to become disconnected. One of the return air frame and the grille frame is provided with a positioning post, and the other of the return air frame and the grille frame is provided with a positioning hole. The positioning post passes through the positioning hole to position the return air frame and the grille frame.

2. The return air assembly according to claim 1, characterized in that, One of the first card connector and the second card connector is provided with a first protrusion; The other of the first and second snap-fit ​​components is provided with a second protrusion or a slot. In the connected state, the first protrusion engages with the second protrusion or the slot portion to connect the first connector and the second connector.

3. The return air assembly according to claim 1, characterized in that, The first snap-fit ​​component includes a first snap-fit ​​portion with a first protrusion. The second snap-fit ​​component includes a second snap-fit ​​portion with a second protrusion on the side of the second snap-fit ​​portion near the first snap-fit ​​portion. In the connected state, the first protrusion is located on the side of the second protrusion near the grille frame to restrict the grille frame from moving away from the return air frame, and is connected to the grille frame. In the disengaged state, the first snap-fit ​​component moves toward the return air frame, causing the first protrusion to be on the side of the second protrusion away from the grille frame, thus disengaging from the grille frame.

4. The return air assembly according to claim 3, characterized in that, The return air frame is provided with a receiving hole, which is located on the side of the return air frame close to the grille frame. The first snap-fit ​​component also includes a pressing part, which is connected to the end of the first snap-fit ​​component away from the return air frame and is slidably disposed in the receiving hole. The pressing part is provided with a blocking member, which can abut against the edge of the receiving hole to prevent the first snap-fit ​​member from disengaging from the grille frame in a direction away from the return air frame.

5. The return air assembly according to claim 4, characterized in that, The second snap-fit ​​member includes at least two second snap-fit ​​portions, which are located on both sides of the receiving hole. The first snap-fit ​​member includes at least two first snap-fit ​​portions, which are located inside the at least two second snap-fit ​​portions and correspond to each of the second snap-fit ​​portions respectively. In the connected state, each first snap-fit ​​portion snaps into each of the second snap-fit ​​portions.

6. The return air assembly according to claim 4, characterized in that, The first snap-fit ​​portion includes a support member and a limiting member disposed opposite to each other. One end of the support member and the limiting member is connected to the pressing portion, and the other end of the support member and the limiting member are connected to each other. A cavity for deformation of the support member is formed between the support member and the limiting member, and the first protrusion is disposed on the limiting member.

7. The return air assembly according to any one of claims 1-6, characterized in that, The return air frame also includes a limiting part, which, in the disengaged state, is at least partially located on the side of the first snap-fit ​​member away from the second snap-fit ​​member, to prevent the first snap-fit ​​member from moving away from the grille frame.

8. The return air assembly according to any one of claims 1-6, characterized in that, The return air frame also includes a limiting groove, which is disposed on the side of the return air frame away from the grille frame. The first snap-fit ​​member includes a first end and a second end disposed opposite to each other along a first direction. The first end of the first snap-fit ​​member is inserted into the limiting groove. The limiting groove is used to limit the movement of the first snap-fit ​​member along the first direction. The first direction is the direction in which the first snap-fit ​​member switches movement between the connected state and the disengaged state. The grid frame is provided with a limiting hole, and in the connected state, the second end of the first snap-fit ​​member is inserted into the limiting hole.

9. The return air assembly according to any one of claims 1-6, characterized in that, The first snap-fit ​​member has an elastic part connected to one end away from the grille frame. The two ends of the elastic part abut against the return air frame and the first snap-fit ​​member, respectively. The elastic part is used to apply an elastic force to the first snap-fit ​​member pointing towards the grille frame so that the first snap-fit ​​member snaps into the second snap-fit ​​member.

10. The return air assembly according to any one of claims 1-6, characterized in that, The grid frame is also provided with a reinforcing part, which is spaced apart from the second snap-fit ​​member. The end of the reinforcing part away from the grid frame is connected to the end of the second snap-fit ​​member away from the grid frame.

11. An indoor unit for an air conditioner, characterized in that, Includes the return air assembly as described in any one of claims 1-10.

12. An air conditioner, characterized in that, It includes an outdoor air conditioning unit and an indoor air conditioning unit as described in claim 11.

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