Air conditioner

Abstract

The utility model provides an air conditioner which comprises a machine shell which is constructed into a shell of the air conditioner. The indoor heat exchanger is arranged in the machine shell and used for exchanging heat with indoor air. The indoor fan assembly is arranged in the machine shell and is adjacent to the indoor heat exchanger. The indoor fan assembly comprises an air duct shell arranged in the machine shell, an air outlet is formed in the air duct shell, an inserting groove is formed in one side of the air outlet, and an abutting groove is formed in the other side of the air outlet. The protective net covers the air outlet, one side of the protective net is provided with an inserting part which is arranged opposite to the inserting groove, and the other side of the protective net is provided with an abutting part which is arranged opposite to the abutting groove; wherein the inserting part is inserted into the inserting groove in an aligned mode, and the abutting part abuts against the interior of the abutting groove in an aligned mode, so that the two opposite sides of the protective net are fixed to the two opposite sides of the air outlet respectively.

Description

Technical Field

[0001] This utility model relates to the field of air conditioning technology, and mainly to an air conditioner. Background Technology

[0002] An air conditioner is a device used to regulate indoor air temperature, humidity, airflow speed, and air cleanliness. It is widely used in homes, offices, commercial spaces, and industrial environments. Its basic principle is to transfer heat through the circulation of refrigerant, utilizing the physical processes of evaporation (absorbing heat) and condensation (releasing heat), thereby achieving a cooling or heating effect. With technological advancements, air conditioners not only possess cooling and heating functions but also integrate dehumidification, air purification, and other functions, becoming an indispensable appliance in modern life.

[0003] An air conditioner typically consists of major components such as a compressor, condenser, evaporator, expansion valve, cross-flow fan, and air outlet duct. The compressor drives the refrigerant circulation, the condenser and evaporator release and absorb heat respectively, the expansion valve regulates the refrigerant flow, and the cross-flow fan in the air outlet duct accelerates airflow to enhance heat exchange efficiency.

[0004] To prevent users from putting their hands inside the indoor unit of the air conditioner and causing safety accidents, protective nets are usually installed at the air outlet of the air duct. Currently, most protective nets are fixed with screws, but they are prone to rusting over time, affecting their appearance. Alternatively, some are installed using a detachable snap-fit ​​structure, but the structure of the protective net is not stable enough and it is easy to loosen and fall off. Utility Model Content

[0005] The purpose of this invention is to provide an air conditioner that improves the impact resistance of the protective net.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] According to one aspect of the present invention, an air conditioner is provided, comprising a housing configured as the outer shell of the air conditioner; an indoor heat exchanger disposed within the housing for exchanging heat with indoor air; and an indoor fan assembly disposed within the housing and arranged adjacent to the indoor heat exchanger. The indoor fan assembly includes: a duct housing disposed within the housing, the duct housing having an air outlet, a slot on one side of the air outlet, and an abutment groove on the other side of the air outlet; and a protective net covering the air outlet, one side of the protective net having an insertion portion arranged opposite to the slot, and the other side of the protective net having an abutment portion arranged opposite to the abutment groove. The insertion portion is inserted into the slot, and the abutment portion abuts against the abutment groove, such that opposite sides of the protective net are respectively fixed to opposite sides of the air outlet.

[0008] The above technical solution has the following advantages or beneficial effects: A slot is provided on the side of the duct housing near the air outlet, and a plug-in part is provided on the corresponding side of the protective net, opposite to the slot. An abutment groove is provided on the other side of the duct housing near the air outlet, and an abutment part is provided on the corresponding side of the protective net, opposite to the abutment groove. One side of the protective net can be inserted into the duct housing, and the other side can abut against the duct housing. Through the cooperation of abutment and snap-fit, the impact force on the protective net can be effectively dispersed onto the duct housing, thereby reducing the risk of damage to the protective net and improving its stability and impact resistance. Moreover, compared with existing technologies, it not only solves the problem of easy rusting of screw structures affecting user experience and appearance, but also provides excellent impact resistance.

[0009] In some embodiments of this application, an air conditioner is provided, wherein an indoor air duct is provided inside the air duct housing, and the indoor air duct is connected to the air outlet; the air conditioner further includes a support frame, which is disposed at the air outlet and on the side of the protective net away from the indoor air duct, and a hook is provided on the side of the support frame near the protective net; the hook can extend into the protective net and engage with the protective net to apply a force to the protective net in the direction away from the indoor air duct, so as to deform the protective net in the direction away from the indoor air duct.

[0010] Another technical solution described above has the following advantages or beneficial effects: the support frame is located at the air outlet and on the side of the protective net furthest from the indoor air duct, providing a front support point for the protective net. On one hand, the snap-fit ​​structure between the support frame and the protective net provides additional support and fixation for the net, enhancing its vibration resistance and reducing vibration or loosening caused by wind pressure or other external factors. On the other hand, by deforming the protective net towards the side furthest from the indoor air duct, it can slightly deform outwards, increasing the interaction force between the net and the duct shell. Combined with the snap-fit ​​structure between the support frame and the front of the net, the insertion structure between one side of the net and the duct shell, and the abutment structure between the other side of the net and the duct shell, the net can be more securely positioned at the air outlet of the duct shell, facilitating installation and disassembly while preventing loosening.

[0011] In some embodiments of this application, an air conditioner is provided, wherein multiple hooks are provided, and the multiple hooks are located on the same arc or the same arc surface, the arc or the arc surface protrudes in an arc shape toward the side away from the indoor air duct; the multiple hooks are respectively engaged with the protective net so that the protective net is arranged to bend along the arc or the arc surface.

[0012] Another technical solution mentioned above has the following advantages or beneficial effects: By setting multiple hooks to engage with the protective net, multiple hooks can provide multiple fixed support points for the protective net, making the force on the protective net more even and preventing some areas of the protective net from loosening or deforming due to stress concentration. Moreover, multiple hooks are located on the same arc or the same arc surface, so that the protective net deforms more evenly along the same arc or arc surface, thereby allowing the entire protective net to deform outward evenly. During installation, it can naturally adapt to curved or irregularly shaped air outlets, thereby improving the overall aesthetics of the air conditioner.

[0013] In some embodiments of this application, an air conditioner is provided, wherein the air outlet is arranged on the duct shell along the height direction of the air conditioner; the support frame is provided on the duct shell along the width direction of the duct shell; the protective net is provided with a spacer groove, the spacer groove extends along the width direction of the protective net, the spacer groove is arranged in the same direction as the support frame, and the hook is engaged with the side edge of the spacer groove.

[0014] Another technical solution in the above-mentioned technical solution has the following advantages or beneficial effects: by extending the interval groove along the width direction of the protective net, the support frame can limit the position of the protective net along the width direction. Moreover, it is beneficial for the front side of the protective net to be evenly stressed in the lateral direction, and to make the protective net and the air duct shell fit more tightly, thereby improving the overall stability of the indoor fan assembly.

[0015] In some embodiments of this application, an air conditioner is provided, wherein the protective net includes a first connecting rod extending along its width direction, the first connecting rod includes two rods, the two first connecting rods are arranged vertically at intervals to form a gap groove; the hook extends into the gap groove and engages with the side edge of one of the first connecting rods.

[0016] Another technical solution in the above-mentioned technical solution has the following advantages or beneficial effects: by arranging the first connecting rod horizontally on the protective net, and setting the two first connecting rods at vertical intervals, the interval arrangement of the two forms an interval groove. The interval groove not only serves as a connection port for the airflow in the indoor air duct to flow through the protective net, but also provides an embedding space for the hook, so that the hook can be inserted into the interval groove to be engaged with the side edge of one of the first connecting rods, further improving the stability of the connection.

[0017] In some embodiments of this application, an air conditioner is provided, wherein multiple slots are provided, and the multiple slots are distributed vertically at intervals along one side of the air outlet on the air duct housing; multiple plug-in portions are provided, and the multiple plug-in portions are arranged vertically at intervals along one side of the protective net, and the plug-in portions are arranged corresponding to the slots.

[0018] Another technical solution mentioned above has the following advantages or beneficial effects: By distributing multiple slots and multiple plug-in parts at intervals and correspondingly plugging them in, the number of fixing points on one side of the protective net can be increased, thereby dispersing the overall force on the protective net, enhancing its overall rigidity, and reducing the risk of loosening or deformation due to uneven force. Furthermore, it improves the impact resistance of the protective net, ensuring that the protective net installed at the air outlet remains stable even under strong winds from the cross-flow fan.

[0019] In some embodiments of this application, an air conditioner is provided, wherein a plurality of abutting grooves are provided, and the plurality of abutting grooves are distributed vertically and intermittently on the air duct shell along the other side of the air outlet; a plurality of abutting portions are provided, and the plurality of abutting portions are arranged vertically and intermittently along the other side of the protective net, and the abutting portions are arranged corresponding to the abutting portions.

[0020] Another technical solution described above has the following advantages or beneficial effects: by distributing multiple abutment grooves and multiple abutment parts vertically at intervals and correspondingly abutting them, the support points on the other side of the protective net can be increased, thereby dispersing the overall force on the protective net and making the overall force on the protective net more uniform, reducing the risk of the protective net loosening or deforming. Furthermore, it also improves the impact resistance of the protective net, ensuring that the protective net installed at the air outlet remains stable even under strong winds from the cross-flow fan.

[0021] In some embodiments of this application, an air conditioner is provided, wherein the duct housing further includes a volute, which is vertically disposed within the housing and has the air outlet; the volute is provided with the slot; a volute tongue is disposed within the volute and is located on one side of the air outlet along the width direction of the duct housing, and the outer side wall of the volute tongue is provided with the abutment groove; the other side of the protective mesh abuts against the outer side wall of the volute tongue through the abutment portion.

[0022] Another technical solution described above has the following advantages or beneficial effects: by setting the abutment groove on the outer wall of the volute tongue, the protective net can not only be fixed to the air outlet through the slot and the abutment groove, but also abut against the outer wall of the volute tongue on the other side, so as to utilize the volute tongue to provide additional support for the protective net. Moreover, it can form a tight connection and fixing structure between the protective net, the volute shell, and the volute tongue, which not only gives the protective net good impact resistance after installation, but also improves the structural stability between the volute shell and the volute tongue.

[0023] In some embodiments of this application, an air conditioner is provided, wherein an abutting rib is protruding on the outer wall of the volute tongue, and the abutting rib is provided with the abutting groove; the protective net includes a second connecting rod, the second connecting rod being arranged along the width direction of the protective net; one end of the second connecting rod is bent to form the abutting portion; the other end of the connecting rod is bent to form the insertion portion.

[0024] Another technical solution in the above-mentioned technical solution has the following advantages or beneficial effects: by providing abutment ribs on the outer side wall of the volute tongue, the abutment part of the protective net can be more accurately aligned and installed. The protrusion of the abutment ribs can also reduce airflow leakage caused by the gap formed by the abutment groove on the outer side wall due to the depression, thereby improving the air outlet efficiency.

[0025] In some embodiments of this application, an air conditioner is provided, wherein the protective net includes a third connecting rod, the third connecting rod is disposed at the top of the protective net, the third connecting rod extends along the width direction of the protective net, and the opposite sides of the third connecting rod are respectively bent downward to form the abutment portion and the insertion portion.

[0026] Another technical solution described above has the following advantages or beneficial effects: by bending the opposite sides of the third connecting rod at the top of the protective net downwards to form an abutment part and an insertion part, the opposite sides of the top of the protective net can be fixed to the entire air duct shell through the abutment part and the insertion part, respectively. Furthermore, bending the third connecting rod upwards avoids direct contact between the end of the third connecting rod and the slot or abutment groove, preventing stress concentration between the insertion part and the abutment part during connection, thereby improving the overall stability and durability of the protective net.

[0027] In some embodiments of this application, an air conditioner is provided, wherein the protective net includes a fourth connecting rod, the fourth connecting rod is disposed at the bottom end of the protective net, the fourth connecting rod extends along the width direction of the protective net, and the opposite sides of the fourth connecting rod are respectively bent upward to form the abutment portion and the insertion portion.

[0028] Another technical solution described above has the following advantages or beneficial effects: by bending the opposite sides of the fourth connecting rod located at the bottom of the protective net upwards to form an abutment part and an insertion part, the opposite sides of the top of the protective net can be fixed to the entire air duct shell through the abutment part and the insertion part, respectively. Furthermore, bending the third connecting rod upwards avoids the end of the fourth connecting rod directly abutting against the slot or abutment groove, preventing stress concentration between the insertion part and the abutment part during connection, thereby improving the overall stability and durability of the protective net. Attached Figure Description

[0029] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the specification, serve to explain the principles of this application.

[0030] Figure 1 This is a schematic diagram of an air conditioner according to an embodiment of this application;

[0031] Figure 2 for Figure 1 Internal diagram;

[0032] Figure 3 for Figure 2 A schematic diagram of the indoor fan assembly;

[0033] Figure 4 for Figure 3 A partial schematic diagram;

[0034] Figure 5 for Figure 4 Enlarged view of a portion at point A;

[0035] Figure 6 for Figure 4 A schematic diagram from another perspective;

[0036] Figure 7 for Figure 6 A magnified view of a portion at point C;

[0037] Figure 8 for Figure 6 An exploded view;

[0038] Figure 9 for Figure 4 A magnified view of section B;

[0039] Figure 10 for Figure 3 A schematic diagram of the protective netting.

[0040] Figure 11 for Figure 6 An exploded view from another perspective;

[0041] The correspondence between the reference numerals and the component names is as follows:

[0042] 1. Chassis; 101. Accommodation space; 110. First subspace; 120. Second subspace; 130. Third subspace;

[0043] 21. Compressor; 22. Outdoor heat exchanger; 23. Indoor heat exchanger; 24. Outdoor fan assembly;

[0044] 3. Indoor fan assembly; 300. Air inlet; 301. Air outlet; 3011. Slot; 3012. Abutment groove; 3013. Spacing groove; 3014. Snap-fit ​​groove; 3015. Indoor air duct; 3016. Air outlet; 31. Air duct housing; 314. Volute; 315. Volute tongue; 3151. Abutment rib; 32. Cross-flow fan wheel; 37. Protective net; 371. Insertion part; 372. Abutment part; 373. First connecting rod; 374. Second connecting rod; 375. Third connecting rod; 376. Snap-fit ​​part; 377. Fourth connecting rod; 378. Fifth connecting rod; 38. Air guide plate;

[0045] 4. Support frame; 41. Hook; 42. Support arm. Detailed Implementation

[0046] This utility model provides an air conditioner. To make the purpose, technical solution, and effects of this utility model clearer and more explicit, the following describes this utility model in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit the scope of protection of this utility model.

[0047] In the description of this utility model, it should be understood that the terms "upper", "lower", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0048] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, an electrical connection, or a connection that allows for communication; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0049] Figure 1 This is a schematic diagram of an air conditioner according to an embodiment of this application;

[0050] like Figure 1 As shown in some embodiments of the present invention, the air conditioner may include a housing 1. The housing 1 may be configured as the outer casing of the air conditioner. The interior of the housing 1 may be used to provide installation space.

[0051] In some embodiments, the housing 1 may adopt a hollow cuboid structure. The length of the housing 1 may be arranged along the height direction, so that the air conditioner can be installed vertically in the usage site, thereby increasing the height of the air conditioner and reducing the space occupied by the air conditioner.

[0052] It should be noted that in other embodiments, the external shape of the housing 1 can be designed as needed, and no limitation is made here.

[0053] Figure 2 for Figure 1 An internal diagram; it should be noted that, Figure 2 for Figure 1A schematic diagram of the hidden casing 1.

[0054] like Figure 2 As shown, in some embodiments, the air conditioner may include a refrigerant circulation loop. The refrigerant circulation loop may include a compressor 21, an outdoor heat exchanger 22, and an indoor heat exchanger 23 connected end-to-end. The refrigerant circulates within the refrigerant circulation loop formed by the compressor 21, the outdoor heat exchanger 22, and the indoor heat exchanger 23. During the refrigerant circulation process, the outdoor heat exchanger 22 and the indoor heat exchanger 23 can respectively function as a condenser and an evaporator, allowing the refrigerant to absorb heat through evaporation in the evaporator and release heat through condensation in the condenser, thereby executing either a cooling cycle or a heating cycle for the air conditioner.

[0055] Specifically, in the refrigeration cycle, the outdoor heat exchanger 22 can act as a condenser, and the indoor heat exchanger 23 can act as an evaporator. In the heating cycle, the outdoor heat exchanger 22 can act as an evaporator, and the indoor heat exchanger 23 can act as a condenser.

[0056] It should be noted that both the refrigeration and heating cycles involve a series of processes, including compression, condensation, expansion, and evaporation, and the supply of refrigerant to the conditioned and heat-exchanged air.

[0057] Compressor 21 is used to compress refrigerant gas and discharge the compressed refrigerant gas. The discharged refrigerant gas flows into the condenser.

[0058] The condenser condenses the compressed refrigerant into a liquid phase, and the heat is released to the surrounding environment through the condensation process.

[0059] The evaporator evaporates the expanded refrigerant and returns the refrigerant gas, now at a low temperature and low pressure, to the compressor 21. The evaporator achieves its cooling effect by utilizing the latent heat of refrigerant evaporation to exchange heat with the surrounding environment.

[0060] Throughout the cycle, the air conditioner can regulate the temperature of the indoor space, improve the comfort of the indoor space, and enhance the user experience.

[0061] like Figure 2 As shown, in some embodiments, the air conditioner may include an outdoor fan assembly 24. The outdoor fan assembly 24 may be arranged opposite to the outdoor heat exchanger 22. The outdoor fan assembly 24 can be used to introduce outdoor air into the housing 1 for heat exchange with the outdoor heat exchanger 22, forming a heat exchange airflow.

[0062] For example, during the cooling cycle, the outdoor heat exchanger 22 acts as a condenser, and the outdoor fan assembly 24 can draw in outside air and blow it onto the outdoor heat exchanger 22 to dissipate heat and lower its temperature. During the heating cycle, the outdoor heat exchanger 22 acts as an evaporator, and the outdoor fan assembly 24 can draw in outside air and blow it onto the outdoor heat exchanger 22 to raise its temperature.

[0063] like Figure 2 As shown, in some embodiments, the air conditioner may include an indoor fan assembly 3. The indoor fan assembly 3 may be arranged opposite to the indoor heat exchanger 23. The indoor fan assembly 3 can be used to introduce indoor air into the casing 1 for heat exchange with the indoor heat exchanger 23, forming a heat exchange airflow.

[0064] For example, during the refrigeration cycle, the indoor heat exchanger 23 acts as an evaporator, and the indoor fan assembly 3 can draw indoor air from outside the casing 1 and blow it towards the indoor heat exchanger 23 to exchange heat with it, thereby reducing the temperature of the air flowing through the indoor heat exchanger 23 and blowing the cooled air back into the room to lower the indoor air temperature.

[0065] For example, during the heating cycle, the indoor heat exchanger 23 acts as a condenser, and the outdoor fan assembly 24 can draw indoor air from outside the casing 1 and blow it towards the indoor heat exchanger 23 to exchange heat with it, raising the temperature of the air flowing through the indoor heat exchanger 23, and then blowing the heated air back into the room to raise the indoor air temperature.

[0066] like Figure 2 As shown, in some embodiments, the compressor 21, outdoor heat exchanger 22, outdoor fan assembly 24, indoor heat exchanger 23, and indoor fan assembly 3 can be respectively disposed in the receiving space 101 inside the casing 1. In this way, the casing 1 can cover and protect them, preventing the erosion of foreign objects or the impact of external forces from causing structural damage, thereby improving the structural reliability of the air conditioner and ensuring that the air conditioner can work normally.

[0067] In some embodiments, the internal accommodating space 101 of the casing 1 may include three sub-spaces. These three sub-spaces are, from bottom to top, a first sub-space 110, a second sub-space 120, and a third sub-space 130. The compressor 21 may be disposed in the first sub-space 110. The outdoor heat exchanger 22 and the outdoor fan assembly 24 may be disposed in the second sub-space 120. The indoor heat exchanger 24 and the indoor fan assembly 3 may be disposed in the third sub-space 130. Thus, by using three layers of sub-spaces from bottom to top, the compressor 21, outdoor heat exchanger 22, outdoor fan assembly 24, indoor heat exchanger 23, and indoor fan assembly 3 can be distributed at different heights within the casing 1, which helps to increase the overall height of the air conditioner, reduce its width and thickness, and minimize the space occupied by the air conditioner in the usage area.

[0068] Figure 3 for Figure 2 A schematic diagram of the indoor fan assembly.

[0069] like Figure 3 As shown, in some embodiments, the indoor fan assembly 3 may include a duct housing 31. The duct housing 31 may be disposed within the housing 1. The duct housing 31 may have an air inlet 300 and an air outlet 301. The air inlet 300 may be arranged opposite to the indoor heat exchanger 23. After indoor air enters the air conditioner, it exchanges heat with the indoor heat exchanger 23. The heat-exchanged air then enters the duct housing 31 through the air inlet 300 and is guided by the duct housing 31 to be delivered indoors through the air outlet 301. Figure 3 As shown, in some embodiments, an indoor air duct 3015 may be provided inside the air duct housing 31. The indoor air duct 3015 may communicate with the air outlet 301. The indoor fan assembly 3 may include a cross-flow fan 32. The cross-flow fan 32 is rotatably disposed inside the air duct housing 31. The cross-flow fan 32 can form airflow within the indoor air duct 3015. Specifically, when the cross-flow fan 32 rotates, the air conditioner can draw air from the room, which flows through the indoor heat exchanger 23 for heat exchange, and then is delivered to the outside through the air outlet 301 of the air duct housing 31.

[0070] like Figure 3 As shown, in some embodiments, the indoor fan assembly 3 may include a protective net 37. The protective net 37 may be installed over the air outlet 301. By installing the protective net 37 over the air outlet 301, it is possible to effectively prevent users from accidentally touching or putting their hands into the air duct housing 31 of the air-conditioned room, and thus contacting the cross-flow fan wheel 32, thereby improving user safety.

[0071] Figure 4 for Figure 3 A partial schematic diagram; Figure 5 for Figure 4 A magnified view of a portion at point A. It should be noted that... Figure 4 for Figure 3 A schematic diagram showing the hidden cross-flow fan 32.

[0072] like Figure 4 and Figure 5 As shown, in some embodiments, the side of the duct housing 31 near the air outlet 301 may be provided with a slot 3011. One side of the protective net 37 may be provided with a plug-in portion 371 arranged opposite to the slot 3011. The plug-in portion 371 of the protective net 37 can be inserted into the slot 3011, so that one side of the protective net 37 can be fixed to one side of the air outlet 301.

[0073] The side of the duct housing 31 closest to the air outlet 301 can be the vertical side of the air outlet 301. A slot 3011 is provided on the side wall of the vertical side of the air outlet 301, and a plug-in part 371 is provided on the side of the protective mesh 37 closest to the slot 3011. The plug-in part 371 is inserted into the plug-in slot, allowing the protective mesh 37 and the duct housing 31 to be fixed together through the plug-in structure, thereby limiting one side of the protective mesh 37 to the duct housing 31. It should be noted that the aforementioned vertical direction can refer to the height direction of the air conditioner.

[0074] Figure 6 for Figure 4 A schematic diagram from another perspective; Figure 7 for Figure 6 A magnified view of a portion of point C.

[0075] like Figure 6 and Figure 7 As shown, in some embodiments, the duct housing 31 may have an abutment groove 3012 on the side near the air outlet 301. The other side of the protective net 37 may have an abutment portion 372 arranged opposite to the abutment groove 3012. The abutment portion 372 of the protective net 37 can abut within the abutment groove 3012. Thus, the opposite sides of the protective net 37 can be fixed to the opposite sides of the air outlet 301.

[0076] The side of the duct housing 31 closest to the air outlet 301 can be the opposite side of the vertical direction of the air outlet 301. The slot 3011 and the abutment groove 3012 can be respectively provided on opposite sides of the air outlet 301. The side wall of the vertical side of the air outlet 301 is provided with the abutment groove 3012, and the protective net 37 is provided with an abutment part 372 on the side closest to the abutment groove 3012. The abutment part 372 is inserted into the abutment groove 3012, so that the protective net 37 and the duct housing 31 can be fixed together through the abutment structure, thereby limiting the other side of the protective net 37 to the duct housing 31. It should be noted that the aforementioned vertical direction can refer to the height direction of the air conditioner.

[0077] Currently, most protective netting 37 is fixed with screws, but over time it is prone to rust, affecting its appearance, and it is also inconvenient for users to disassemble, clean, and install. Alternatively, some netting 37 uses a detachable snap-fit ​​structure for installation, but this often results in the protective netting 37 being structurally unstable and prone to loosening and falling off.

[0078] In the technical solution of this application, a slot 3011 is provided on the side of the air duct housing 31 near the air outlet 301, and a plug-in part 371 is provided on the corresponding side of the protective net 37, which is arranged opposite to the slot 3011. An abutment groove 3012 is provided on the other side of the air duct housing 31 near the air outlet 301, and an abutment part 372 is provided on the corresponding side of the protective net 37, which is arranged opposite to the abutment groove 3012. One side of the protective net 37 can be inserted into the air duct housing 31, and the other side of the protective net 37 can abut against the air duct housing 31. In this way, during the installation of the protective net 37, the user can first align the plug-in part 371 with the slot 3011 and insert the plug-in part 371 into the slot 3011, and then align the abutment part 372 on the other side of the protective net 37 with the abutment groove 3012 and push the abutment part 372 into the abutment groove 3012, simplifying the installation and disassembly process. Moreover, the side of the protective net 37 that abuts against the air duct shell 31 can provide a certain support for the protective net 37, so that the protective net 37 can better resist deformation and damage when subjected to impact.

[0079] Thus, the protective net 37 is connected to the duct shell 31 on both sides through a double fixing method of abutment and snap-fit, which can effectively disperse the stress of the protective net 37 when subjected to external forces. When the air conditioner is running, the airflow in the duct may exert a certain impact force on the protective net 37. The protective net 37 may also be subjected to a certain impact force when moving the air conditioner or in other usage scenarios. Through the cooperation of abutment and snap-fit, this impact force can be effectively dispersed onto the duct shell 31, thereby reducing the risk of damage to the protective net 37 and improving the stability and impact resistance of the protective net 37. Moreover, compared with the existing technology, it not only solves the problem that the screw structure is prone to rust, affecting the user's use and appearance, but also has good impact resistance.

[0080] Figure 8 for Figure 6 An exploded image.

[0081] It should be noted that, as Figure 8 As shown, the air outlet 301 is provided at the air supply end of the duct housing 31. A protective net 37 is provided at the air outlet 301. Furthermore, the duct housing 31 is also provided with an air supply port 3016. The air supply port 3016 is located on the side of the air outlet 301 away from the indoor air duct 3015. That is, the air supply port 3016 is located outside the air outlet 301, and the air guide plate 38 is provided on the side of the protective net 37 away from the indoor air duct 3015.

[0082] like Figure 1 and Figure 2 As shown, in some embodiments, the air conditioner may include an air guide vane 38. The air guide vane 38 may be disposed at the air outlet 3016. The air guide vane 38 is rotatably disposed on the air duct housing 31. The air guide vane 38 guides airflow to blow into the room at different angles by rotating.

[0083] Figure 9 for Figure 4 A magnified view of section B.

[0084] like Figure 4 and Figure 9 As shown, in some embodiments, the air conditioner may include a support frame 4. An air guide plate 38 is rotatably mounted on the support frame 4. The upper and lower ends of the air guide plate 38 are rotatably connected to the air duct housing 31, respectively. The support frame 4 provides a pivot point for the installation of the air guide plate 38. The support frame 4 further improves the stability of the air guide plate 38 during rotation, allowing the air conditioner to blow air smoothly.

[0085] In some embodiments, the support frame 4 may be located at the air outlet 301. The support frame 4 may be located on the side of the protective net 37 away from the indoor air duct 3015. The side of the support frame 4 near the protective net 37 may be provided with a hook 41. The hook 41 can extend into the protective net 37 and engage with the protective net 37 to apply a force to the protective net 37 in the direction away from the indoor air duct 3015, causing the protective net 37 to deform in the direction away from the indoor air duct 3015.

[0086] Specifically, the support frame 4 is located at the air outlet 301 and on the side of the protective net 37 away from the indoor air duct 3015, providing a front support point for the protective net 37. The support frame 4 has a hook 41 on the side near the protective net 37, which can extend into and engage with the protective net 37, thereby applying a force to the protective net 37 in a direction away from the indoor air duct 3015. This design allows the support frame 4 to apply a force to the protective net 37 in a direction away from the indoor air duct 3015. On the one hand, the engaging structure between the support frame 4 and the protective net 37 provides additional support and fixation for the protective net 37, enhancing its vibration resistance and reducing vibration or loosening of the protective net 37 due to wind pressure or other external factors. On the other hand, by deforming the protective net 37 toward the side away from the indoor air duct 3015, the protective net 37 can be slightly deformed outward, thereby increasing the interaction force between the protective net 37 and the side of the air duct shell 31 that abuts against it. Combined with the snap-fit ​​structure between the support frame 4 and the front of the protective net 37, the plug-in structure between one side of the protective net 37 and the air duct shell 31, and the abutting structure between the other side of the protective net 37 and the air duct shell 31, the protective net 37 can be more firmly fixed at the air outlet 301 of the air duct shell 31. This facilitates installation and disassembly, and the protective net 37 is not easy to loosen, thus improving the impact resistance of the protective net 37.

[0087] like Figure 6 and Figure 8 As shown, in some embodiments, multiple hooks 41 may be provided. Multiple hooks 41 may be located on the same arc or the same arc surface. The arc or arc surface may protrude in an arc shape toward the side away from the indoor air duct 3015. Multiple hooks 41 are respectively engaged with the protective net 37, so that the protective net 37 bends and deforms along the arc or arc surface toward the side away from the indoor air duct.

[0088] It should be noted that the surface of the hook 41 that engages with the protective netting 37 is curved. Multiple hooks 41 engaging with the protective netting 37 can be located on the same curved line or on the same curved surface. Specifically, when multiple hooks 41 are vertically misaligned, they can be located on the same curved surface.

[0089] To improve the aesthetics of current air conditioners and optimize airflow distribution at the vent 301, the vent 301 is often designed in an arc or irregular shape. Traditional methods of fixing the protective net 37 are difficult to adapt to these shapes and offer poor stability. In this embodiment, multiple hooks 41 are used to engage with the protective net 37. These hooks provide multiple support points for the net 37, resulting in more even stress distribution and preventing stress concentration that could cause it to loosen or deform in certain areas. Furthermore, the multiple hooks 41 are located on the same arc or surface, allowing the net 37 to deform more evenly along the same arc or surface. This allows the net 37 to deform outwards uniformly, naturally adapting to the arc or irregular shape of the vent 301 during installation, thus improving the overall aesthetics of the air conditioner.

[0090] like Figure 8 As shown, in some embodiments, the hooks 41 may include two. The two hooks 41 may be symmetrically distributed along the center of the protective net 37.

[0091] like Figure 8 As shown, in some embodiments, the air outlet 301 can be arranged on the duct housing 31 along the height direction of the air conditioner. The support frame 4 can be provided on the duct housing 31 along the width direction of the duct housing 31. The protective net 37 can be provided with a spacer groove 3013. The spacer groove 3013 can extend along the width direction of the protective net 37. The spacer groove 3013 can be arranged in the same direction as the support frame 4. The hook 41 can be engaged with the side edge of the spacer groove 3013.

[0092] Specifically, the support frame 4 is arranged along the width direction of the air duct shell, and the protective net 37 can be respectively limited on the air duct shell 31 on both sides along the height direction of the air conditioner. By extending the spacer slot 3013 along the width direction of the protective net 37, the support frame 4 can limit it along the width direction of the protective net 37. In this way, the limiting direction of the support frame 4 on the protective net 37 intersects with the limiting direction of the air duct shell 31 on the protective net 37, which can further improve the stability and impact resistance of the protective net 37.

[0093] Since the protective net 37 is located at the air outlet 301, the airflow at the air outlet 301 will exert a certain pressure on the protective net 37. If the fixation is uneven, the protective net 37 may locally warp or loosen, affecting the air supply effect. In this embodiment, by arranging the support frame 4 along the width direction of the protective net 37 and cooperating with the spacer groove 3013 extending along the width direction of the protective net 37, it is beneficial for the front side of the protective net 37 to be evenly stressed laterally, and to make the protective net 37 fit more tightly with the air duct shell 31, thereby improving the overall stability of the indoor fan assembly 3.

[0094] Figure 10 for Figure 3 A schematic diagram of the protective netting.

[0095] like Figure 10 As shown, in some embodiments, the protective net 37 may include first connecting rods 373 extending along its width. Two first connecting rods 373 may be included. The two first connecting rods 373 may be arranged vertically at intervals to form a spacing groove 3013. Hooks 41 may extend into the spacing groove 3013 and engage with the side edge of one of the first connecting rods 373.

[0096] Specifically, the first connecting rod 373 is arranged on the protective net 37 along the width direction of the protective net 37. Two first connecting rods 373 are arranged at vertical intervals, and the interval between them forms an interval groove 3013. The interval groove 3013 not only serves as a connection port for the airflow in the indoor air duct 3015 to flow through the protective net 37, but also provides an embedding space for the hook 41, so that the hook 41 can extend into the interval groove 3013 to engage with the side edge of one of the first connecting rods 373, further improving the stability of the connection.

[0097] like Figure 8 and Figure 9 As shown, in some embodiments, the support frame 4 may include a support arm 42. A hook 41 may be provided on the support arm 42. The support arm 42 may extend into the spacer groove 3013, and the hook 41 may engage with the side edge of the first connecting rod 373.

[0098] like Figure 8 As shown, in some embodiments, the hook 41 can be positioned upwards. The hook 41 can engage with the side edge of the upper first connecting rod 373. It should be noted that in other embodiments, the hook 41 can be positioned downwards. The hook 41 can engage with the side edge of the lower first connecting rod 373.

[0099] Figure 11 for Figure 6 An exploded view from another perspective.

[0100] like Figure 4 and Figure 11 As shown, in some embodiments, multiple slots 3011 may be provided. Multiple slots 3011 may be distributed vertically and alternately on one side of the air outlet 301 on the air duct housing 31. Multiple plug-in portions 371 may be provided, and multiple plug-in portions 371 may be arranged vertically and alternately on one side of the protective net 37, and the plug-in portions 371 may be arranged corresponding to the slots 3011.

[0101] Multiple slots 3011 are arranged at intervals along the vertical direction of the air outlet 301, that is, at intervals along the height direction of the air duct housing 31. Correspondingly, insertion parts 371 are arranged at intervals vertically along the side of the protective net 37 facing the slots 3011 to correspond to the arrangement of the slots 3011. By distributing and correspondingly inserting multiple slots 3011 and multiple insertion parts 371 at intervals vertically, the number of fixing points of the protective net 37 can be increased, thereby dispersing the overall force on the protective net 37, enhancing the overall rigidity of the protective net 37, and reducing the risk of the protective net 37 loosening or deforming due to uneven force. Moreover, it also improves the impact resistance of the protective net 37, so that the protective net 37 installed at the air outlet 301 can remain stable even under strong wind conditions of the cross-flow fan.

[0102] In some embodiments, the slot 3011 may be formed by a sidewall recess of the air duct housing 31.

[0103] like Figure 4 and Figure 11 As shown, in some embodiments, multiple abutment grooves 3012 may be provided. Multiple abutment grooves 3012 may be distributed vertically and intermittently on the air duct housing 31 along the other side of the air outlet 301. Multiple abutment portions 372 may be provided, and multiple abutment portions 372 may be arranged vertically and intermittently along the other side of the protective net 37, and the abutment portions 372 may be arranged corresponding to the abutment.

[0104] Among them, multiple abutment grooves 3012 are arranged at intervals along the vertical direction of the air outlet 301, that is, multiple abutment grooves 3012 are arranged at intervals along the height direction of the air duct shell 31. Correspondingly, the abutment part 372 is arranged at intervals along the side of the protective net 37 facing the abutment groove 3012 to correspond to the setting of the slot 3011.

[0105] During long-term use, the protective net 37, secured only by a single abutting part 372 and a single abutting groove 3012, may loosen, shift, or deform due to wind impact, vibration, or temperature changes. By distributing multiple abutting grooves 3012 and multiple abutting parts 372 vertically at intervals and correspondingly abutting them, the support points on the other side of the protective net 37 can be increased, thereby dispersing the overall force on the protective net 37, making the overall force on the protective net 37 more uniform, and reducing the risk of the protective net 37 loosening or deforming. Moreover, it also improves the impact resistance of the protective net 37, allowing the protective net 37 installed at the air outlet 301 to remain stable even under strong winds from the cross-flow fan.

[0106] like Figure 3 As shown, in some embodiments, the abutment groove 3012 and the slot 3011 can be arranged correspondingly on both sides of the air outlet 301. Alternatively, the abutment groove 3012 and the slot 3011 can be arranged in a staggered manner on both sides of the air outlet 301.

[0107] like Figure 8 As shown, in some embodiments, the duct housing 31 may include a volute 314. The volute 314 may be disposed within the housing 1 along the height direction of the air conditioner. The volute 314 may be provided with an air outlet 301. The volute 314 forms the main outer housing of the duct housing 31, and the cross-flow fan 32 is installed inside the volute 314.

[0108] like Figure 8 As shown, in some embodiments, the duct housing 31 may include a volute tongue 315. The volute tongue 315 may be disposed within the volute housing 314. The volute tongue 315 may be located on one side along the width direction of the duct housing 31. The volute tongue 315 and the volute housing 314 together define the indoor air duct 3015. The volute tongue 315 can be used to guide the airflow within the indoor air duct 3015 to flow smoothly out, thereby reducing wind resistance and improving wind speed and air outlet efficiency.

[0109] like Figure 8 As shown, in some embodiments, the outer wall of the volute tongue 315 may be provided with an abutment groove 3012. The other side of the protective net 37 can abut against the outer wall of the volute tongue 315 through the abutment part 372. By providing the abutment groove 3012 on the outer wall of the volute tongue 315, the protective net 37 can not only be fixed to the air outlet 301 through the slot 3011 and the plug-in part, but also abut against the outer wall of the volute tongue 315 on the other side, so as to utilize the volute tongue 315 to provide additional support for the protective net 37. In this way, one side of the protective net 37 is inserted into the volute 314, thus forming a fixed limiting structure with the volute 314. The other side of the protective net 37 abuts against the volute tongue 315, thus forming a fixed limiting structure with the volute tongue 315. This allows a tight connection and fixing structure to be formed between the protective net 37, the volute 314, and the volute tongue 315. This not only gives the protective net 37 good impact resistance after installation, but also improves the structural stability between the volute 314 and the volute tongue 315.

[0110] like Figure 8 As shown, in some embodiments, an abutment rib 3151 may be protruding on the outer wall of the volute tongue 315. The abutment rib 3151 may have an abutment groove 3012. By providing the abutment rib 3151 protruding on the outer wall of the volute tongue 315, the abutment portion 372 of the protective net 37 can be more accurately aligned and installed. The protrusion of the abutment rib 3151 can also reduce airflow leakage caused by the gap formed by the abutment groove 3012 on the outer wall of the wall due to the recess, thereby improving the air outlet efficiency.

[0111] like Figure 10As shown, in some embodiments, the protective net 37 may include a second connecting rod 374. The second connecting rod 374 may be arranged along the width direction of the protective net 37. One end of the second connecting rod 374 may be bent to form an abutment portion 372. The other end of the second connecting rod 374 may be bent to form a insertion portion 371.

[0112] Specifically, the abutment portion 372 is formed by bending one end of the second connecting rod 374 along the width direction of the protective net 37, and the insertion portion 371 is formed by bending the other end of the second connecting rod 374 along the width direction of the protective net 37. Thus, the second connecting rod 374 of the protective net 37 adopts a structure with both ends bent, allowing the protective net 37 to form a double-fixed limiting structure between the slot 3011 and the abutment groove 3012, thereby improving the installation stability of the protective net 37 on the air duct housing 31. Furthermore, it facilitates the even distribution of force on the second connecting rod 374 arranged along the width of the protective net 37, making the protective net 37 less prone to deformation during use, thereby reducing air vibration noise.

[0113] like Figure 10 As shown, in some embodiments, the abutment portion 372 can be an L-shaped hook formed by bending one end of the second connecting rod 374 along the width direction of the protective net 37. The insertion portion 371 can be an L-shaped hook formed by bending the other end of the second connecting rod 374 along the width direction of the protective net 37.

[0114] like Figure 10 As shown, in some embodiments, the protective net 37 may include a plurality of second connecting rods 374. The plurality of second connecting rods 374 may be spaced apart along the length of the protective net 37. Specifically, the plurality of second connecting rods 374 are spaced apart along the length of the protective net 37, which also means they are spaced apart along the height of the air outlet housing. A connecting hole may be formed between the spaced-apart second connecting rods 374, allowing airflow to smoothly flow through the connecting hole to the outside of the air outlet 301.

[0115] like Figure 10 As shown, in some embodiments, the protective net 37 may include a third connecting rod 375, which may be disposed at the top of the protective net 37. The third connecting rod may extend along the width direction of the protective net, and the opposite sides of the third connecting rod may be bent downward to form an abutment portion and an insertion portion, respectively.

[0116] The third connecting rod 375 can be located at the top of the protective net 37. The opposite sides of the third connecting rod 375 can be bent downwards to form an abutment part 372 and an insertion part 371, respectively.

[0117] Specifically, by bending the opposite sides of the third connecting rod 375 at the top of the protective net 37 downwards to form an abutment portion 372 and a plug portion 371, the opposite sides of the top of the protective net 37 can be fixed to the air duct housing 31 through the abutment portion 372 and the plug portion 371, respectively. Furthermore, bending the third connecting rod 375 downwards avoids the end of the third connecting rod 375 directly abutting against the slot 3011 or the abutment groove 3012, preventing stress concentration between the plug portion 371 and the abutment portion 372 during connection, thereby improving the overall stability and durability of the protective net 37.

[0118] like Figure 10 As shown, in some embodiments, the abutment portion 372 and the insertion portion 371 may also be formed by bending the two sides of the first connecting rod 373 respectively.

[0119] In some embodiments, the two sides of the first connecting rod 373 may be bent in the same direction to form an abutment portion 372 and a plug portion 371 with the same opening direction.

[0120] like Figure 8 and Figure 10 As shown, in some embodiments, the protective net 37 may include a fourth connecting rod 377, which may be located at the bottom end of the protective net 37. The fourth connecting rod 377 may extend along the width direction of the protective net 37. The opposite sides of the fourth connecting rod 377 may be bent upwards to form an abutment portion and an insertion portion, respectively.

[0121] Specifically, by bending the opposite sides of the fourth connecting rod 377 upwards to form an abutment portion 372 and a plug portion 371, the opposite sides of the bottom end of the protective net 37 can be fixed to the entire air duct housing 31 through the abutment portion 372 and the plug portion 371, respectively. Furthermore, bending the fourth connecting rod 377 upwards avoids the end of the fourth connecting rod 377 directly abutting against the slot 3011 or the abutment groove 3012, preventing stress concentration between the plug portion 371 and the abutment portion 372 during connection, thereby improving the overall stability and durability of the protective net 37.

[0122] like Figure 10 As shown, in some embodiments, the protective net 37 may include a fifth connecting rod 378. The two ends of the fifth connecting rod 378 may extend along the length of the protective net 37. The fifth connecting rod 378 and the second connecting rod 374 may intersect to form a mesh structure of the protective net 37, and multiple connecting holes are formed between the fifth connecting rod 378 and the second connecting rod 374, allowing airflow to smoothly flow through the connecting holes to the outside of the air outlet 301.

[0123] In some embodiments, multiple fifth connecting rods 378 may be provided. The multiple fifth connecting rods 378 may be arranged at intervals along the width of the protective net. The multiple fifth connecting rods 378 may intersect with multiple second connecting rods 374 to form multiple communicating holes.

[0124] like Figure 10 As shown, in some embodiments, the protective net 37 may include a snap-fit ​​portion 376. Two snap-fit ​​portions 376 may be provided. The two snap-fit ​​portions 376 may be respectively located at the top and bottom ends of the protective net 37. Correspondingly, snap-fit ​​grooves 3014 are provided on the upper and lower opposite sides of the air outlet 301, and the snap-fit ​​portions 376 located at the top and bottom ends can be correspondingly inserted into the snap-fit ​​grooves 3014. In this way, the upper and lower sides and the left and right opposite sides of the protective net 37 can be fixedly positioned with the air duct housing 31.

[0125] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of this application is limited only by the appended claims.

Claims

1. An air conditioner, characterized in that, include: The housing, which is configured to form the outer casing of the air conditioner; An indoor heat exchanger is located inside the casing and is used to exchange heat with indoor air. An indoor fan assembly is disposed within the housing and arranged adjacent to the indoor heat exchanger; the indoor fan assembly includes: A duct housing is disposed inside the housing. The duct housing has an air outlet, a slot is provided on one side of the air outlet, and an abutment groove is provided on the other side of the air outlet. A protective net is provided at the air outlet. One side of the protective net has a plug-in part arranged opposite to the slot, and the other side of the protective net has an abutment part arranged opposite to the abutment groove. The plug-in part is inserted into the slot, and the abutting part is abutted against the abutting groove, so that the opposite sides of the protective net are respectively fixed on the opposite sides of the air outlet. The air duct housing has an indoor air duct inside, and the indoor air duct is connected to the air outlet. The air conditioner also includes a support frame, which is located at the air outlet and on the side of the protective net away from the indoor air duct. The side of the support frame near the protective net is provided with a hook. The hook can extend into the protective net and engage with the protective net to apply a force to the protective net away from the indoor air duct, causing the protective net to deform towards the side away from the indoor air duct.

2. The air conditioner according to claim 1, characterized in that, The hooks are provided in multiple ways, and the multiple hooks are located on the same arc or the same arc surface. The arc or the arc surface protrudes in an arc shape toward the side away from the indoor air duct. Multiple hooks are respectively engaged with the protective net to make the protective net bend along the arc or curved surface.

3. The air conditioner according to claim 1, characterized in that, The air outlet is arranged on the air duct housing along the height direction of the air conditioner; The support frame is disposed on the air duct shell along the width direction of the air duct shell; The protective net is provided with a slot, which extends along the width of the protective net and is arranged in the same direction as the support frame. The hook is engaged with the side edge of the slot.

4. The air conditioner according to claim 3, characterized in that, The protective net includes a first connecting rod extending along its width, and the first connecting rod includes two rods, which are arranged vertically at intervals to form the interval groove. The hook extends into the spacer slot and engages with the side edge of one of the first connecting rods.

5. The air conditioner according to claim 1, characterized in that, The slots are provided in multiple ways, and the multiple slots are distributed vertically and at intervals on one side of the air outlet on the air duct housing; The plug-in portion is provided in multiple ways, and the multiple plug-in portions are arranged vertically at intervals along one side of the protective net, and the plug-in portion is arranged corresponding to the slot.

6. The air conditioner according to claim 1, characterized in that, The abutment groove is provided in multiple ways, and the multiple abutment grooves are distributed vertically and intermittently on the air duct shell along the other side of the air outlet; The abutting part is provided in multiple ways, and the multiple abutting parts are arranged vertically and horizontally at intervals along the other side of the protective net, and the abutting parts are arranged corresponding to the abutting groove.

7. The air conditioner according to claim 1, characterized in that, The air duct housing also includes: A volute is vertically disposed within the housing, and the volute is provided with the air outlet; the volute is provided with the slot; A volute tongue is provided inside the volute shell. The volute tongue is located on one side of the air outlet along the width direction of the air duct shell. The abutment groove is provided on the outer side wall of the volute tongue. The other side of the protective net abuts against the outer wall of the snail tongue via the abutting part.

8. The air conditioner according to claim 7, characterized in that, The outer side wall of the volute tongue is provided with abutting ribs, and the abutting ribs are provided with abutting grooves; The protective net includes a second connecting rod, which is arranged along the width of the protective net; one end of the second connecting rod is bent to form the abutting part; the other end of the second connecting rod is bent to form the insertion part.

9. The air conditioner according to claim 8, characterized in that, The protective net includes a third connecting rod, which is located at the top of the protective net and extends along the width of the protective net. The opposite sides of the third connecting rod are bent downward to form the abutment portion and the insertion portion, respectively. The protective net includes a fourth connecting rod, which is located at the bottom of the protective net and extends along the width of the protective net. The opposite sides of the fourth connecting rod are bent upwards to form the abutment portion and the insertion portion, respectively.

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