Air conditioner

Abstract

This utility model provides an air conditioner, including a housing and an electrical control box assembly, the electrical control box assembly being disposed within the housing. The electrical control box assembly includes a mounting base, an electrical control board, a fire-resistant outer shell, and a fire-resistant box cover. The mounting base has a mounting opening on at least one side; the fire-resistant outer shell covers the outer side wall of the mounting base excluding the mounting opening, and the fire-resistant box cover is disposed at the mounting opening; wherein, the fire-resistant outer shell and the fire-resistant box cover form a box structure, the mounting base has a connecting portion extending outward from the outer periphery of the mounting opening at the edge of the mounting opening, the connecting portion extending along the side edge of the mounting opening; the fire-resistant outer shell has a flange extending outward from the outer periphery of the mounting opening at the edge near the connecting portion, and the flange is disposed outside the connecting portion; the fire-resistant box cover includes a cover plate, which is disposed at the mounting opening of the mounting base; the flange extends outward from the periphery of the cover plate towards one side of the fire-resistant outer shell; the connecting portion is encapsulated between the periphery of the cover plate and the flange.

Description

Technical Field

[0001] This utility model relates to the field of refrigeration electrical 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] Currently, air conditioners are equipped with a controller to control the operating status of the air conditioner. The control box generally includes a first mounting shell and a second mounting shell arranged opposite each other. The first and second mounting shells are connected to form a mounting cavity for mounting the electronic control board. The first and second mounting shells protect the electronic control board.

[0004] In some extreme cases, the control board may catch fire. The first and second mounting shells are prone to catching fire due to their materials. Other controllers use fire-resistant materials, but the combustion of the control board increases the air pressure in the mounting cavity, which can damage the connection between the first and second mounting shells. The control board may then detach from the mounting cavity, causing other components of the air conditioner to catch fire and creating a safety hazard. Summary of the Invention

[0005] Based on the prior art, this application provides an air conditioner in which the electronic control board in the controller assembly can be stably and reliably disposed within the box-shaped structure formed by the fire-resistant box cover and the fire-resistant outer shell, thereby improving its fire resistance performance.

[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, including a housing configured as the outer shell of the air conditioner; an electrical control box assembly disposed within the housing, the electrical control box assembly including a mounting base, the mounting base having a mounting cavity, and at least one side of the mounting base having a mounting opening communicating with the mounting cavity; an electrical control board disposed within the mounting cavity; a fire-resistant outer shell made of fire-resistant material, the fire-resistant outer shell covering the outer side wall of the mounting base except for the mounting opening; and a fire-resistant box cover made of fire-resistant material, the fire-resistant box cover covering the mounting opening; wherein the fire-resistant outer shell and the fire-resistant box cover form a box structure, the... The mounting base is located inside the box structure; the mounting base has a connecting portion extending outward from the mounting opening at the edge of the mounting opening, and the connecting portion extends along the side edge of the mounting opening; the fire-resistant outer shell has a flange extending outward from the mounting opening at the side edge near the connecting portion, and the flange is located outside the connecting portion; the fire-resistant box cover includes a cover plate covering the mounting opening of the mounting base; a flange extending outward from the circumferential side edge of the cover plate towards one side of the fire-resistant outer shell; the connecting portion is encapsulated between the circumferential side edge of the cover plate and the flange.

[0008] The above technical solution has the following advantages or beneficial effects: By setting up a refractory shell made of refractory material and a refractory box cover made of refractory material to form a box structure, the mounting base and the internal electrical control board are completely enclosed. This effectively confines the flame and high temperature within the internal space, preventing the fire and heat from spreading to the outside. Furthermore, by providing a connecting part extending towards the outer periphery of the mounting opening at the edge of the mounting base, and providing a flange extending towards the outer periphery of the mounting opening at the edge of the refractory shell near the connecting part, the flange is located on the outside of the connecting part. The flanged portion of the refractory box cover extends from the periphery of the cover plate towards the refractory shell. The connecting portion is encapsulated between the periphery of the cover plate and the flanged portion, allowing the mounting base to be confined between the refractory shell and the cover plate, and the refractory shell to be confined between the refractory box cover and the mounting base. This forms a multi-layered, nested, and mutually cooperating encapsulation structure among the refractory shell, the refractory box cover, and the mounting base. Even when the electrical control board is burning, a reliable connection structure can be formed between the refractory shell and the refractory box cover. This mutually cooperating encapsulation structure greatly enhances the tightness of the connection between the components, with each component supporting and constraining the others to jointly resist external and internal forces. This effectively resists the impact of gas pressure, prevents the refractory box cover from separating from the refractory shell, and also prevents flames and high-temperature gases from leaking from the connection points to the outside of the electrical control box assembly. This ensures that the internal electrical control board remains within the internal space enclosed by the refractory box cover and the refractory shell, providing a solid structural guarantee for fire protection.

[0009] In some embodiments of this application, an air conditioner is provided, wherein the flanged portion covers the outside of the connecting portion and the flanged portion, and a receiving groove is formed between the flanged portion and the peripheral edge of the cover plate, and the connecting portion and the flanged portion are respectively received in the receiving groove.

[0010] Another technical solution described above has the following advantages or beneficial effects: By forming a receiving groove between the flange and the peripheral edge of the cover plate, the connecting part and the flange are respectively received within the receiving groove, with the flange covering the outer side of the connecting part and the flange. When the control board and the plastic mounting base catch fire, the flame and high-temperature gas need to pass through the connection between the fire-resistant box cover and the fire-resistant outer shell during their outward diffusion. Because the flange covers the outer side of the connecting part and the flange, the flame and heat need to travel through a more complex path to spread to the outside, thereby effectively slowing down the spread speed of the flame and heat and effectively improving its fire resistance performance.

[0011] In some embodiments of this application, an air conditioner is provided, wherein the flanged portion is located at the side edge of the top of the cover plate, the flanged portion extends along the side edge of the top of the cover plate, and the receiving groove extends along the side edge of the top of the cover plate.

[0012] Another technical solution mentioned above has the following advantages or beneficial effects: To further improve the fire resistance of the electrical control box assembly, by placing the flanged portion on the top side edge of the cover plate, the flanged portion can cover the connecting portion and the top outer side of the flange, and the flanged portion extends along the top side edge of the cover plate. The receiving groove formed by it also extends along the top side edge of the cover plate, thereby directly blocking the upward path of the flame. When the electrical control board or mounting base catches fire, the flanged portion can prevent the flame from continuing to spread upward as the flame in the mounting cavity spreads upward. At the same time, in conjunction with the multi-layer nested and mutually cooperating encapsulation structure between the fire-resistant shell, the fire-resistant box cover, and the mounting base, it can effectively prevent the flame and high-temperature gas from leaking out from the top of the mounting base, effectively protecting the components of the air conditioner located around the electrical control box assembly from flame damage.

[0013] In some embodiments of this application, an air conditioner is provided, wherein the fire-resistant box cover includes an extension wall that extends from the side of the flange away from the cover plate toward the fire-resistant outer shell. The extension wall is located on the outside of the fire-resistant outer shell, and the length direction of the extension wall extends along the length direction of the edge of the receiving groove.

[0014] Another technical solution described above has the following advantages or beneficial effects: To further reduce the risk of flames escaping from the inside of the mounting base to the outside of the refractory box cover and refractory shell during combustion, an extension wall is provided on the side of the flange away from the cover plate, extending towards the refractory shell. This extension wall is located on the outside of the refractory shell, thus increasing the path length of the flame propagation from inside the electrical control box assembly to its outside. Furthermore, by providing an extension wall on the outside of the flange, the connection reliability of the mating structure between the refractory shell and the refractory box cover is further improved, making the connection between the refractory box cover and the refractory shell more secure, less prone to loosening or detachment, and preventing detachment from the box structure formed by the refractory box cover and the refractory shell during combustion.

[0015] In some embodiments of this application, an air conditioner is provided, wherein the flanged portion includes a first covering wall extending from the peripheral edge of the cover plate toward the mounting base, the first covering wall being located above the connecting portion and the flanged portion; a second covering wall extending downward from the side of the first covering wall away from the cover plate, the first covering wall being located on the side of the connecting portion and the flanged portion away from the cover plate; a receiving groove formed between the peripheral edge of the cover plate, the first covering wall, and the second covering wall; and an extending wall extending from the lower end of the second covering wall toward the side away from the cover plate.

[0016] Another technical solution in the above-mentioned technical solution has the following advantages or beneficial effects: by setting a flanged part including a first cover wall and a second cover wall, the first cover wall, the second cover wall and the peripheral edge of the cover plate form a receiving groove. Since the first cover wall, the second cover wall and the peripheral edge of the cover plate are located in different directions, the flame formed inside the mounting base can be blocked at multiple angles. The bottom wall of the receiving groove formed can reliably cover the top of the connecting part and the insertion part, thereby preventing the internal flame from rushing out through the top of the mounting port.

[0017] In some embodiments of this application, an air conditioner is provided, wherein the connecting portion is provided with an abutment rib on the side away from the cover plate, and the abutment rib is snapped onto the top wall of the fire-resistant shell.

[0018] Another technical solution mentioned above has the following advantages or beneficial effects: By providing a retaining rib on the side of the connection away from the cover plate, when the mounting base is assembled with the refractory shell, the retaining rib is engaged with the top wall of the refractory shell. The retaining rib can form a vertical abutting structure with the top wall of the refractory shell, thereby limiting the refractory box cover in the vertical direction and preventing it from detaching upward from the refractory shell. Moreover, when the electrical control board burns, the high temperature deformation and the change in air pressure inside the mounting base will generate impact forces in various directions on the refractory box cover and the refractory shell. The engagement between the retaining rib and the top wall of the refractory shell can effectively resist these external forces. Furthermore, the retaining rib is located in the receiving groove and can also form a mutual abutting structure with the inner side wall of the receiving groove, thereby preventing relative movement or loosening between the refractory box cover and the refractory shell, ensuring that the two always maintain a tight connection, and ensuring that the electrical control board and other components inside the electrical control box assembly can still be reliably confined inside the refractory box cover and the refractory shell even when burning.

[0019] In some embodiments of this application, an air conditioner is provided, wherein the connecting portion is provided with an anti-detachment rib on the side away from the cover plate, the anti-detachment rib is disposed above the flange, and the anti-detachment rib and the flange are arranged vertically opposite to each other; an anti-detachment groove is formed between the anti-detachment rib and the top wall of the mounting base, and the flange is disposed in the anti-detachment groove.

[0020] Another technical solution in the above-mentioned technical solution has the following advantages or beneficial effects: by providing an anti-detachment rib on the side of the connection part away from the cover plate, an anti-detachment groove is formed between the anti-detachment rib and the top wall of the mounting base, the flange is limited in the anti-detachment groove, and the anti-detachment rib can form an upper and lower abutment structure with the top of the flange, thereby limiting the flange in the vertical direction and preventing it from detaching from the mounting base upward. Furthermore, when the control board burns, the high-temperature deformation and the pressure changes inside the mounting bracket cause various directional impacts on the fire-resistant box cover and the fire-resistant outer shell. The anti-detachment ribs not only abut against the flange vertically to limit its movement, but also abut against the inner wall of the second covering wall to limit its movement horizontally. Even when the mounting bracket, made of plastic, melts along with the control board, the molten plastic fills the space between the flange and the inner wall of the receiving groove, forming a tight and reliable connection structure. This ensures that the fire-resistant outer shell and the fire-resistant box cover remain connected at the top, effectively keeping the internal control board within the fire-resistant protection space and greatly improving the fire resistance of the air conditioner.

[0021] In some embodiments of this application, an air conditioner is provided, wherein the top wall of the mounting base is provided with a snap-fit ​​rib; the inner side wall of the fire-resistant shell is provided with a snap-fit ​​groove, the snap-fit ​​rib is snapped into the snap-fit ​​groove, and the snap-fit ​​groove covers the outer periphery of the snap-fit ​​rib.

[0022] Another technical solution described above has the following advantages or beneficial effects: By protruding the snap-fit ​​ribs on the top wall of the mounting base and recessing the snap-fit ​​grooves into the inner side wall of the fire-resistant shell, after the snap-fit ​​ribs are engaged, in the vertical direction, the upper and lower walls of the snap-fit ​​grooves restrict the vertical movement of the snap-fit ​​ribs, preventing the mounting base from separating from the fire-resistant shell in the vertical direction. In the horizontal direction, the side walls of the snap-fit ​​grooves block the horizontal displacement of the snap-fit ​​ribs, preventing the mounting base from swaying left and right or back and forth relative to the fire-resistant shell. In this way, the mating structure between the snap-fit ​​ribs can form a multi-directional limiting effect, making the connection between the mounting base and the fire-resistant shell more stable.

[0023] In some embodiments of this application, an air conditioner is provided, wherein the top wall of the mounting base is provided with heat dissipation holes; the top wall of the fire-resistant shell is provided with a buffer wall, the buffer wall covers the top of the heat dissipation holes, and a buffer cavity is formed between the bottom surface of the buffer wall and the top wall of the mounting base, the heat dissipation holes connect the buffer cavity and the mounting cavity; a vent hole is provided between one side of the buffer wall and the top wall of the fire-resistant shell, the vent hole connects the buffer cavity and the outside of the fire-resistant shell.

[0024] Another technical solution in the above-mentioned technical solution has the following advantages or beneficial effects: Since the control board easily generates heat during operation, by setting heat dissipation holes on the top wall of the mounting base, the heat inside the mounting cavity can be dissipated to the outside of the control box assembly in a timely manner. Specifically, the heat or hot air inside the mounting cavity can flow to the outside of the control box assembly sequentially through the heat dissipation holes, buffer cavity, and vent holes, effectively preventing a large accumulation of heat inside the mounting cavity and causing localized temperature processes, thus improving the safety and effectiveness of the control board's operation. Furthermore, in terms of fire resistance, by covering the top of the heat dissipation holes with a buffer wall, and with the vent holes formed between one side of the buffer wall and the top wall of the fire-resistant shell, the vent holes and heat dissipation holes can be staggered, avoiding direct alignment. When the control board is in an abnormal fire state, the buffer wall can prevent flames and high-temperature hot air from directly entering the housing through the heat dissipation holes, thereby reducing the escape of heat to the outside of the control box assembly through the heat dissipation holes.

[0025] In some embodiments of this application, an air conditioner is provided, wherein the fire-resistant outer shell is provided with a communication port opposite to the heat dissipation hole, the communication port connecting the heat dissipation hole and the buffer cavity; the buffer wall includes a first buffer sidewall, one side of the first buffer sidewall being connected to one side edge of the communication port, and the other side of the first buffer sidewall extending upward toward the fire-resistant outer shell; a second buffer sidewall being disposed opposite to the heat dissipation hole above, one side of the second buffer sidewall being connected to the first buffer sidewall; a third buffer sidewall extending downward from the side of the second buffer sidewall away from the first buffer sidewall, the lower end of the third buffer sidewall being connected to the other side edge of the communication port; the buffer cavity is formed between the first buffer sidewall, the second buffer sidewall, and the third buffer sidewall, and the ventilation hole is formed by the first buffer sidewall, the second buffer sidewall, the third buffer sidewall, and one side edge of the communication port.

[0026] Another technical solution described above has the following advantages or beneficial effects: the second buffer sidewall directly covers the heat dissipation holes, thus forming a shielding structure above the heat dissipation holes and providing a shielding effect, while not affecting the heat dissipation inside the electrical control box assembly. When a fire occurs in the electrical control box assembly due to short circuits, overloads, or other reasons, the flames rise. The first, second, and third buffer sidewalls cooperate to restrict the spread of the flames from different directions, preventing the flames from directly escaping upwards through the heat dissipation holes to other structural areas within the casing. Moreover, the arched structure formed by the first, second, and third buffer sidewalls increases the path length of the flames from inside the electrical control box assembly to the outside. The flames need to bypass or pass through the heat dissipation holes to reach the north and south sides of the buffer cavity, and then pass through the various sidewalls of the buffer wall before reaching the outside through the side connection. During this process, the energy of the flames is continuously consumed. The buffer wall design helps to reduce the speed and intensity of flame propagation. Attached Figure Description

[0027] 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.

[0028] Figure 1 This is a schematic diagram of an air conditioner according to an embodiment of this application;

[0029] Figure 2 for Figure 1 A three-dimensional structural diagram of the central electrical control box assembly;

[0030] Figure 3 for Figure 2 A schematic diagram from another perspective;

[0031] Figure 4 for Figure 3An exploded view;

[0032] Figure 5 for Figure 2 A cross-sectional view;

[0033] Figure 6 for Figure 5 Enlarged view of a portion at point A;

[0034] Figure 7 for Figure 4 Schematic diagram of the structure of the refractory shell;

[0035] Figure 8 for Figure 4 Schematic diagram of the structure of the refractory box lid;

[0036] Figure 9 for Figure 4 Schematic diagram of the middle mounting base;

[0037] Figure 10 for Figure 2 Another cross-sectional view;

[0038] The correspondence between the reference numerals and the component names is as follows:

[0039] 1. Housing;

[0040] 2. Electrical control box assembly; 200. Mounting cavity; 201. Mounting port; 202. Receiving groove; 203. Anti-detachment groove; 204. Snap-fit ​​groove; 205. Heat dissipation hole; 206. Buffer cavity; 207. Ventilation hole; 208. Communication port; 209. First slot;

[0041] 21. Mounting base; 211. Connecting part; 212. Abutment rib; 213. Anti-detachment rib; 214. Snap-fit ​​rib; 215. First snap hook; 22. Electrical control board;

[0042] 23. Fire-resistant outer shell; 231. Flanged edge; 232. Buffer wall; 2321. First buffer sidewall; 2322. Second buffer sidewall; 2323. Third buffer sidewall; 233. Boss;

[0043] 24. Fire-resistant box cover; 241. Cover plate; 242. Flanged edge; 2421. First covering wall; 2422. Second covering wall; 243. Extension wall. Detailed Implementation

[0044] 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.

[0045] 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.

[0046] 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.

[0047] Figure 1 This is a schematic diagram of an air conditioner according to an embodiment of this application.

[0048] 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.

[0049] like Figure 1 As shown, in some embodiments, the housing 1 can adopt a hollow cuboid structure. The length of the housing 1 can be arranged along the height direction, allowing the air conditioner to be installed vertically in the usage area, increasing the height of the air conditioner and reducing the space occupied by the air conditioner. It should be noted that in other embodiments, the appearance shape of the housing 1 can be designed as needed, and is not limited here.

[0050] In some embodiments, the air conditioner may include a refrigerant circulation loop. The refrigerant circulation loop may include a compressor (not shown), an outdoor heat exchanger (not shown), and an indoor heat exchanger (not shown), connected end-to-end. The refrigerant circulates within the refrigerant circulation loop comprised of the compressor, the outdoor heat exchanger, and the indoor heat exchanger. During the refrigerant circulation process, the outdoor heat exchanger and the indoor heat exchanger can function as a condenser and an evaporator, respectively, 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.

[0051] Specifically, in the refrigeration cycle, the outdoor heat exchanger can act as a condenser, and the indoor heat exchanger can act as an evaporator. In the heating cycle, the outdoor heat exchanger can act as an evaporator, and the indoor heat exchanger can act as a condenser.

[0052] 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.

[0053] The compressor is used to compress refrigerant gas and discharge the compressed refrigerant gas. The discharged refrigerant gas flows into the condenser.

[0054] The condenser condenses the compressed refrigerant into a liquid phase, and the heat is released into the surrounding environment through the condensation process.

[0055] The evaporator evaporates the expanded refrigerant and returns the refrigerant gas, now at a low temperature and low pressure, to the compressor. The evaporator achieves its cooling effect by utilizing the latent heat of refrigerant evaporation to exchange heat with the surrounding environment.

[0056] 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.

[0057] In some embodiments, the air conditioner may include an outdoor fan assembly (not shown). The outdoor fan assembly may be arranged opposite to an outdoor heat exchanger. The outdoor fan assembly can be used to introduce outdoor air into the casing 1 for heat exchange with the outdoor heat exchanger, forming a heat exchange airflow.

[0058] For example, in a cooling cycle, the outdoor heat exchanger acts as a condenser, and the outdoor fan assembly draws in outside air and blows it onto the outdoor heat exchanger to dissipate heat and lower its temperature. In a heating cycle, the outdoor heat exchanger acts as an evaporator, and the outdoor fan assembly draws in outside air and blows it onto the outdoor heat exchanger to raise its temperature.

[0059] In some embodiments, the air conditioner may include an indoor fan assembly. The indoor fan assembly may be arranged opposite to an indoor heat exchanger. The indoor fan assembly can be used to introduce indoor air into the casing 1 for heat exchange with the indoor heat exchanger, forming a heat exchange airflow.

[0060] For example, during the refrigeration cycle, the indoor heat exchanger acts as an evaporator. The indoor fan assembly can draw indoor air from outside the casing 1 and blow it towards the indoor heat exchanger to exchange heat with it, thereby reducing the temperature of the air flowing through the indoor heat exchanger. The cooled air is then blown back into the room to lower the indoor air temperature.

[0061] For example, during the heating cycle, the indoor heat exchanger acts as a condenser, and the outdoor fan assembly can draw indoor air from outside the casing 1 and blow it towards the indoor heat exchanger to exchange heat with it, raising the temperature of the air flowing through the indoor heat exchanger, and then blowing the heated air back into the room to raise the indoor air temperature.

[0062] In some embodiments, the compressor, outdoor heat exchanger, outdoor fan assembly, indoor heat exchanger, and indoor fan assembly can be respectively housed in the accommodating space inside the casing 1. In this way, the casing 1 can provide a protective cover, preventing damage to the structure caused by the erosion of foreign objects or the impact of external forces, thereby improving the structural reliability of the air conditioner and ensuring that the air conditioner can work normally.

[0063] Figure 2 for Figure 1 A three-dimensional structural diagram of the central electrical control box assembly; Figure 3 for Figure 2 A schematic diagram from another perspective.

[0064] like Figure 2 and Figure 3 As shown, in some embodiments, the air conditioner may include an electrical control box assembly 2, which is disposed within the housing 1. The controller controls the operating state of the air conditioner, such as controlling the operation of the indoor heat exchanger and the outdoor heat exchanger.

[0065] Figure 4 for Figure 3 An exploded view; Figure 5 for Figure 2 A cross-sectional view.

[0066] like Figure 4 and Figure 5 As shown, in some embodiments, the electrical control box assembly 2 includes a mounting base 21, which can provide space for the various components of the electrical control box assembly 2. The mounting base 21 may have a mounting cavity 200, and at least one side of the mounting base 21 has a mounting opening 201, which communicates with the mounting cavity 200.

[0067] The electrical control box assembly 2 includes an electrical control board 22, which is disposed within the mounting cavity 200. The electrical control board 22 integrates various electronic components and circuits, and is responsible for receiving user input commands and precisely controlling various functional modules of the air conditioner according to preset programs, such as adjusting cooling and heating modes, setting temperatures, and controlling fan speed. The electrical control board 22 can be inserted and installed within the mounting cavity 200 through the mounting port 201.

[0068] The electrical control box assembly 2 includes a fire-resistant outer shell 23, which is made of fire-resistant material. The fire-resistant outer shell 23 can be installed on the outer wall of the mounting base 21, excluding the mounting opening 201. Because the fire-resistant outer shell 23 is made of fire-resistant material, it provides physical protection to the mounting base 21. Furthermore, in the event of combustion of the electrical control board 22 under extreme conditions, the fire-resistant outer shell 23 can effectively block the spread of flames and high temperatures, preventing the fire from spreading to other parts of the mounting base 21 and other components of the air conditioner, thus avoiding a larger fire and greatly improving the fire safety of the air conditioner.

[0069] The electrical control box assembly 2 includes a fire-resistant box cover 24, which is made of fire-resistant material. The fire-resistant box cover 24 can be placed on the mounting opening 201. The fire-resistant outer shell 23 and the fire-resistant box cover 24 form a box structure. The mounting base 21 and the electrical control board 22 are both located inside the box structure.

[0070] Specifically, the fire-resistant box cover 24 can cooperate with the fire-resistant shell 23 to completely enclose the mounting base 21 in the box structure formed by the fire-resistant material. In this way, the fire-resistant box structure formed by the fire-resistant box cover 24 and the fire-resistant shell 23 can completely wrap the mounting base 21 and the electrical control board 22, providing physical isolation and fire protection when the electrical control board 22 is burning.

[0071] In some embodiments, the fire-resistant cover 24 and the fire-resistant shell 23 can be made of the same refractory material, such as metal, which has good processing properties and facilitates the manufacturing and installation process. Alternatively, the fire-resistant cover 24 and the fire-resistant shell 23 can be made of materials such as inorganic refractory materials, ceramic fiber composite materials, or polymer flame-retardant materials.

[0072] Figure 6 for Figure 5 A magnified view of part A.

[0073] like Figure 5 and Figure 6 As shown, in some embodiments, the mounting base 21 may be provided with a connecting portion 211 extending toward the outer periphery of the mounting opening 201 at the edge of the mounting opening 201, and the connecting portion 211 extends along the side edge of the mounting opening 201.

[0074] The fire-resistant shell 23 may have a flange 231 extending toward the outer periphery of the mounting opening 201 at the edge of the side near the connecting part 211. The flange 231 is located on the outside of the connecting part 211.

[0075] The refractory box cover 24 may include a cover plate 241 and a flange 242. The cover plate 241 is placed over the mounting opening 201 of the mounting base 21 and covers the mounting opening 201. The flange 242 may extend from the peripheral edge of the cover plate 241 toward the refractory shell 23. A connecting part 211 is encapsulated between the peripheral edge of the cover plate 241, the flange 242, and the flange 231.

[0076] Specifically, a flange 231 extending towards the outer periphery of the mounting opening 201 can be provided on the edge of the refractory shell 23 near the connecting portion 211. The flange 231 is located on the outside of the connecting portion 211, forming an overlapping structure between the flange 231 and the connecting portion 211. Furthermore, a flange portion 242 extending towards the refractory shell 23 is provided on the periphery of the cover plate 241. The connecting portion 211 is encapsulated between the periphery of the cover plate 241, the flange portion 242, and the flange 231, allowing the mounting base 21 to be positioned between the refractory shell 23 and the refractory box cover 24. Furthermore, since the flange 231 is located between the connecting part 211 and the flange 242, the fire-resistant shell 23 can be limited between the fire-resistant box cover 24 and the mounting base 21. This forms a multi-layered nested and mutually cooperating encapsulation structure between the fire-resistant shell 23, the fire-resistant box cover 24, and the mounting base 21. At the same time, the synergistic effect between these multi-layered structures ensures a reliable fit between the fire-resistant shell 23 and the fire-resistant box cover 24, even when the electrical control board 22 is burning. This allows the electrical control board 22 to be reliably housed within the box structure made of fire-resistant material, thereby improving the fire resistance of the electrical control box assembly 2.

[0077] In the prior art, under extreme circumstances, the control board 22 may burn. The outer casing of the control board 22 is prone to catching fire due to its material properties. Other controllers use fire-resistant materials, but the burning of the control board 22 increases the air pressure in the mounting cavity 200, which can damage the connection between the outer casings. The control board 22 may detach from the mounting cavity 200, causing other components of the air conditioner to burn, thus creating a safety hazard.

[0078] Furthermore, since the mounting base 21 needs to form a connection with the control board 22, if the mounting base 21 is made of materials such as metal, ceramic, or other organic fire-retardant materials, it is difficult to form a tight and reliable connection between these fire-retardant materials and the control board 22. Generally, plastic is used as the mounting base 21; however, in extreme cases, if the control board 22 burns, the plastic mounting base 21 is likely to burn as well.

[0079] The technical solution of this application uses a fire-resistant outer shell 23 and a fire-resistant cover 24, both made of fire-resistant material, to form a box structure, thereby completely enclosing the mounting base 21 and the internal electrical control board 22. This effectively confines the flames and high temperatures within the internal space, preventing the fire and heat from spreading to the outside and providing the electrical control board 22 with a relatively independent fireproof zone. Specifically, when the electrical control board 22 catches fire, the flames and high-temperature gases are first confined within this box structure and will not rapidly spread to other components of the air conditioner, thus reducing the risk of further fire spread.

[0080] Furthermore, by providing a connecting portion 211 extending toward the outer periphery of the mounting opening 201 at the edge of the mounting base 21, a flange 231 extending toward the outer periphery of the mounting opening 201 is provided on the side edge of the fireproof shell 23 near the connecting portion 211, and the flange 231 is provided on the outside of the connecting portion 211. The flange 242 of the fireproof box cover 24 extends from the periphery of the cover plate 241 toward the fireproof shell 23. The connecting part 211 is encapsulated between the periphery of the cover plate 241, the flange 242 and the flange 231, so that the mounting base 21 can be limited between the fireproof shell 23 and the cover plate 241, and the fireproof shell 23 can be limited between the fireproof box cover 24 and the mounting base 21. This forms a multi-layer nested and mutually cooperating encapsulation structure between the fireproof shell 23, the fireproof box cover 24 and the mounting base 21. Even when the electrical control board 22 is burning, a reliable cooperating connection structure can be formed between the fireproof shell 23 and the fireproof box cover 24. This mutually cooperating encapsulation structure greatly enhances the tightness of the connection between the components. The components support and constrain each other and jointly resist external and internal forces. This effectively resists the impact of air pressure, prevents the fireproof box cover 24 from separating from the fireproof shell 23, and also prevents flames and high-temperature gases from leaking out from the connection part 211. This ensures that the internal electrical control board 22 is always within the internal space enclosed by the fireproof box cover 24 and the fireproof shell 23, providing a solid structural guarantee for fire protection.

[0081] On the other hand, even if the mounting base 21 is made of plastic, the high temperature generated by the electrical control board 22 during combustion can easily cause the plastic material to melt or catch fire. The melted plastic of the mounting base 21 can fill the space between the flange 231, the cover plate 241 and the flange 242, and further work with the fire-resistant box cover 24 and the fire-resistant outer shell 23 to form a tight and reliable structure. This more effectively keeps the internal electrical control board 22 within the fire-resistant protection space, greatly improving the fire resistance of the air conditioner.

[0082] Figure 7 for Figure 4 A schematic diagram of the structure of the medium-sized refractory shell.

[0083] like Figure 7 As shown, in some embodiments, multiple flanges 231 may be provided, and the multiple flanges 231 may be provided at intervals on the peripheral edge of the outer side of the fireproof side. It should be noted that in other embodiments, the flanges 231 may be arranged to extend along the length direction of the connecting portion 211.

[0084] like Figure 2 As shown, in some embodiments, the mounting base 21 and the refractory box cover 24 are also connected by a snap-fit ​​structure. Specifically, one of the mounting base 21 and the refractory box cover 24 is provided with a first hook 215, and the other is provided with a first slot 209. The first hook 215 engages with the first slot 209, thus connecting the refractory outer shell 23 mounting base 21 and the refractory box cover 24 together. In this way, the connection structure between the connecting part 211 and the flange 231 further improves the reliability of the box structure formed between the mounting base 21 and the refractory box cover 24.

[0085] In some embodiments, the refractory shell 23 and the refractory box cover 24 are further connected by a snap-fit ​​structure. Specifically, one of the refractory shell 23 and the refractory box cover 24 is provided with a second hook (not shown in the figure), and the other of the refractory shell 23 and the refractory box cover 24 is provided with a first slot 209 (not shown in the figure). The first hook 215 engages with the first slot 209, thereby connecting the refractory shell 23 and the refractory box cover 24 together. Thus, the connection structure between the connecting part 211 and the flange 231 further improves the reliability of the box structure formed between the refractory shell 23 and the refractory box cover 24.

[0086] like Figure 6 As shown, in some embodiments, the flange 242 may cover the outside of the connecting portion 211 and the flange 231, and form a receiving groove 202 between the flange and the peripheral edge of the cover plate 241, with the connecting portion 211 and the flange 231 respectively receiving in the receiving groove 202.

[0087] Specifically, by forming a receiving groove 202 between the flange 242 and the peripheral edge of the cover plate 241, the connecting part 211 and the flange 231 are respectively housed within the receiving groove 202, with the flange 242 covering the outer sides of the connecting part 211 and the flange 231. When the control board 22 and the plastic mounting base 21 catch fire, the flame and high-temperature gas need to pass through the connection between the fireproof box cover 24 and the fireproof outer shell 23 during their outward diffusion. Since the flange 242 covers the outer sides of the connecting part 211 and the flange 231, the flame and heat need to travel through a more complex path to reach the outside, thereby effectively slowing down the propagation speed of the flame and heat and effectively improving its fire resistance performance.

[0088] like Figure 5 As shown, in some embodiments, the flange 242 is located at the side edge of the top of the cover plate 241, and the flange 242 extends along the side edge of the top of the cover plate 241, and the receiving groove 202 extends along the side edge of the top of the cover plate 241. The flange 231 may be correspondingly provided on the top wall of the fire-resistant shell 23, and the connecting portion 211 may be correspondingly provided on the top wall of the mounting base 21.

[0089] When the control board 22 or the mounting base 21 catches fire, the internal flames will rise upwards. To further improve the fire resistance of the control box assembly 2, a flange 242 is provided on the top side edge of the cover plate 241. Correspondingly, the flange 242 can cover the top outer side of the connecting part 211 and the flange 231, and the flange 242 extends along the top side edge of the cover plate 241. The receiving groove 202 formed by it also extends along the top side edge of the cover plate 241, thereby directly blocking the path of the flames upwards. During the upward spread of the flames, the flange 242 can prevent the flames from continuing to spread upwards. At the same time, in conjunction with the multi-layer nested and mutually cooperating encapsulation structure between the fire-resistant shell 23, the fire-resistant box cover 24, and the mounting base 21, it can effectively prevent the flames and high-temperature gases from leaking out from the top of the mounting base 21, effectively protecting the components of the air conditioner located around the control box assembly 2 from flame damage.

[0090] In some embodiments, the flange 242 may be provided on other side edges of the top of the cover plate 241, and the flange 242 may be provided on multiple side edges of the cover plate 241 accordingly.

[0091] Figure 8 for Figure 4 Schematic diagram of the structure of the refractory box lid;

[0092] like Figure 5 , Figure 6 and Figure 8 As shown, in some embodiments, the refractory box cover 24 may include an extension wall 243. The extension wall 243 extends from the side of the flange 242 away from the cover plate 241 toward the refractory shell 23. The extension wall 243 may be located at one edge of the opening of the receiving groove 202. The extension wall 243 is located on the outside of the refractory shell 23, and the length direction of the extension wall 243 extends along the length direction of the edge of the receiving groove 202. The length of the extension wall 243 may correspond to the length of the connecting portion 211.

[0093] To further reduce the risk of flames escaping from the interior of the mounting base 21 to the exterior of the refractory box cover 24 and the refractory shell 23 during combustion, an extension wall 243 is provided on the side of the flange 242 away from the cover plate 241, extending towards the refractory shell 23. This extension wall 243 is located on the outer side of the refractory shell 23, thus increasing the path length of the flame propagation from the interior of the electrical control box assembly 2 to its exterior. Furthermore, by providing the extension wall 243 on the outer side of the flange 242, the reliability of the connection between the refractory shell 23 and the refractory box cover 24 is further improved, making the connection between them more secure and less prone to loosening or detachment. This allows the electrical control board 22 to be reliably installed inside the mounting base 21, preventing it from detaching from the box structure formed by the refractory box cover 24 and the refractory shell 23 during combustion.

[0094] like Figure 6 As shown, in some embodiments, the bottom surface of the extension wall 243 can be attached to the top surface of the fire-resistant shell 23, which can further block the flame from escaping through the gap between the extension wall 243 and the fire-resistant shell 23, thereby improving the fire resistance of the electrical control box assembly 2.

[0095] like Figure 5 , Figure 7 and Figure 8 As shown, in some embodiments, the flange 242 may include a first covering wall 2421, which may extend from the peripheral edge of the cover plate 241 toward the mounting base 21. The first covering wall 2421 is located above the connecting portion 211 and the flange 242. In this way, the first covering wall 2421 can cover the top of the connecting portion 211 and the flange 242, and when the internal mounting base 21 or the electrical control board 22 catches fire, the first covering can prevent the flame from directly passing through the top of the mounting opening 201.

[0096] The flange 242 may include a second covering wall 2422, which may extend downward from the side of the first covering wall 2421 away from the cover plate 241. The lower end of the second covering wall 2422 may extend above the top wall of the fireproof shell 23. The first covering wall 2421 is located on the side of the connection 211 and the flange 231 away from the cover plate 241.

[0097] The receiving groove 202 is formed between the peripheral edge of the cover plate 241 and the first covering wall 2421 and the second covering wall 2422. Specifically, the receiving groove 202 may be U-shaped. The extending wall 243 extends from the lower end of the second covering wall 2422 toward the side away from the cover plate 241.

[0098] The flange 242 includes a first cover wall 2421 and a second cover wall 2422. The first cover wall 2421, the second cover wall 2422 and the peripheral edge of the cover plate 241 form a receiving groove 202. Since the first cover wall 2421, the second cover wall 2422 and the peripheral edge of the cover plate 241 are located in different directions, the flame formed inside the mounting base 21 can be blocked from multiple angles. The bottom wall of the receiving groove 202 can reliably cover the top of the connecting part 211 and the insertion part, thereby preventing the flame inside from escaping through the top of the mounting port 201.

[0099] When the refractory box cover 24 is made of metal, the first covering wall 2421 and the second covering wall 2422 can be formed by bending, and its processing structure is simple.

[0100] like Figure 6 As shown, in some other embodiments, the flange 242 includes a first covering wall 2421, the top of which can be connected to the peripheral edge of the cover plate 241. An extension wall 243 extends from the lower end of the second covering wall 2422 toward the side away from the cover plate 241. A receiving groove 202 can be formed between the peripheral edge of the cover plate 241 and the first covering wall 2421. The receiving groove 202 formed between the first covering wall 2421 and the peripheral edge of the cover plate 241 can be V-shaped.

[0101] In some other embodiments, the flange 242 may include a plurality of cover walls connected in sequence, and a receiving groove 202 may be formed between the plurality of cover walls and the peripheral edge of the cover plate 241.

[0102] Figure 9 for Figure 4 Schematic diagram of the middle mounting base; Figure 10 for Figure 2 Another cross-sectional view.

[0103] like Figure 9 and Figure 10 As shown, in some embodiments, the connecting part 211 may be provided with an abutment rib 212 on the side away from the cover plate 241. The abutment rib 212 is provided in the receiving groove 202 and is snapped onto the top wall of the fire-resistant shell 23.

[0104] Among them, by providing an abutment rib 212 on the side of the connecting part 211 away from the cover plate 241, when the mounting base 21 is assembled with the fireproof shell 23, the abutment rib 212 is engaged with the top wall of the fireproof shell 23. The abutment rib 212 can form a structure of abutting each other with the top wall of the fireproof shell 23, thereby limiting the fireproof box cover 24 in the vertical direction and preventing it from detaching from the fireproof shell 23. Furthermore, when the control board 22 burns, the high-temperature deformation and the change in air pressure inside the mounting base 21 will generate impact forces in various directions on the fireproof box cover 24 and the fireproof shell 23. The engagement between the abutment rib 212 and the top wall of the fireproof shell 23 can effectively resist these external forces. Moreover, the abutment rib 212 is located in the receiving groove 202 and can also form a mutual abutment structure with the inner side wall of the receiving groove 202, thereby preventing relative movement or loosening between the fireproof box cover 24 and the fireproof shell 23, ensuring that the two always maintain a tight connection, and ensuring that the components such as the control board 22 inside the control box assembly 2 can still be reliably confined inside the fireproof box cover 24 and the fireproof shell 23 in the state of combustion.

[0105] like Figure 9 As shown, in some embodiments, multiple abutment ribs 212 may be provided, and the multiple abutment ribs 212 may be arranged at intervals on the side of the connecting portion 211 away from the cover plate 241. Among them, any two abutment ribs 212 may be provided on opposite sides of the flange 231.

[0106] like Figure 9 As shown, in some embodiments, the side of the connecting portion 211 away from the cover plate 241 may be provided with an anti-detachment rib 213, which is located within the receiving groove 202. The anti-detachment rib 213 is located above the flange 231, and the anti-detachment rib 213 and the flange 231 are arranged vertically opposite each other. An anti-detachment groove 203 is formed between the anti-detachment rib 213 and the top wall of the mounting base 21, and the flange 231 is located within the anti-detachment groove 203.

[0107] Among them, an anti-detachment rib 213 can be provided on the side of the connecting part 211 away from the cover plate 241. An anti-detachment groove 203 is formed between the anti-detachment rib 213 and the top wall of the mounting base 21. The flange 231 is limited within the anti-detachment groove 203. The anti-detachment rib 213 can form a structure of mutual abutment with the top of the flange 231, thereby limiting the flange 231 in the vertical direction and preventing it from detaching from the mounting base 21 upward. Furthermore, when the control board 22 burns, the high-temperature deformation and the pressure change inside the mounting base 21 cause various directional impacts on the fire-resistant box cover 24 and the fire-resistant outer shell 23. The anti-detachment rib 213 not only abuts against the flange 231 vertically to limit the flange 231, but also abuts against the inner wall of the second cover wall to limit the flange 231 horizontally. Even when the mounting base 21, made of plastic, melts along with the control board 22, the molten plastic can fill between the flange 231 and the inner wall of the receiving groove 202, thus forming a tight and reliable connection structure. This ensures that the fire-resistant outer shell 23 and the fire-resistant box cover 24 can always remain connected at the top, more effectively keeping the internal control board 22 within the fire-resistant protection space and greatly improving the fire resistance of the air conditioner.

[0108] In some embodiments, multiple anti-detachment ribs 213 may be provided, and the anti-detachment ribs 213 are respectively provided on the top of each flange 231.

[0109] like Figure 4 , Figure 9 and Figure 10 As shown, in some embodiments, the top wall of the mounting base 21 may be provided with a snap-fit ​​rib 214, and the inner side wall of the fire-resistant shell 23 may be provided with a snap-fit ​​groove 204. The snap-fit ​​rib 214 can be aligned and snapped into the snap-fit ​​groove 204, and the snap-fit ​​groove 204 covers the outer periphery of the snap-fit ​​rib 214.

[0110] Specifically, by having the snap-fit ​​rib 214 protrude from the top wall of the mounting base 21 and the snap-fit ​​groove 204 recessed into the inner side wall of the fire-resistant shell 23, after the snap-fit ​​ribs 214 are engaged, in the vertical direction, the upper and lower walls of the snap-fit ​​groove 204 restrict the vertical movement of the snap-fit ​​rib 214, preventing the mounting base 21 from separating from the fire-resistant shell 23 vertically. In the horizontal direction, the side wall of the snap-fit ​​groove 204 blocks the horizontal displacement of the snap-fit ​​rib 214, preventing the mounting base 21 from swaying left and right or back and forth relative to the fire-resistant shell 23. In this way, the mating structure between the snap-fit ​​ribs 214 can form a multi-directional limiting effect, making the connection between the mounting base 21 and the fire-resistant shell 23 more stable.

[0111] Furthermore, since the snap-fit ​​groove 204 covers the outer periphery of the snap-fit ​​rib 214, compared to the prior art where the fire-resistant shell 23 is provided with a snap-fit ​​hole through the periphery, and the snap-fit ​​rib 214 is snapped together with the snap-fit ​​hole, the flame can escape outward through the snap-fit ​​hole when the electrical control board 22 catches fire in extreme cases. In this embodiment, the snap-fit ​​groove 204 covering the outer periphery of the snap-fit ​​rib 214 can play a fireproof isolation role.

[0112] like Figure 7 As shown, in some embodiments, a boss 233 is formed on the outer side wall of the fire-resistant shell 23 at the position corresponding to the snap-fit ​​groove 204, and the top of the boss 233 can abut against the bottom of the extension wall 243.

[0113] like Figure 7 As shown, in some embodiments, multiple snap-fit ​​ribs 214 can be provided, and multiple snap-fit ​​ribs 214 can be spaced apart along the peripheral sidewall of the mounting base 21. Multiple snap-fit ​​grooves 204 can be provided on the inner sidewall of the fire-resistant shell 23. The snap-fit ​​grooves 204 are correspondingly provided with the snap-fit ​​ribs 214, so that multiple snap-fit ​​connection points can be formed between the fire-resistant shell 23 and the mounting base 21, further improving the reliable connection between the fire-resistant shell 23 and the mounting base 21, which is beneficial for the mounting base 21 to be stably installed inside the fire-resistant shell 23 and the fire-resistant box cover 24.

[0114] like Figure 9 and Figure 10 As shown, in some embodiments, the top wall of the mounting base 21 may be provided with heat dissipation holes 205. Multiple heat dissipation holes 205 may be provided, and the heat dissipation holes 205 may allow the heat inside the mounting base 21 to be dissipated to the outside.

[0115] The top wall of the fire-resistant shell 23 may be provided with a buffer wall 232, which covers the top of the heat dissipation hole 205, and a buffer cavity 206 is formed between the bottom surface of the buffer wall 232 and the top wall of the mounting base 21. The heat dissipation hole 205 connects the buffer cavity 206 and the mounting cavity 200.

[0116] A vent 207 is provided between one side of the buffer wall 232 and the top wall of the fire-resistant shell 23, and the vent 207 connects the buffer cavity 206 and the outside of the fire-resistant shell 23.

[0117] Since the control board 22 easily generates heat during operation, heat dissipation holes 205 are provided on the top wall of the mounting base 21 to allow the heat inside the mounting cavity 200 to be dissipated to the outside of the control box assembly 2 in a timely manner. Specifically, the heat or hot air inside the mounting cavity 200 can flow to the outside of the control box assembly 2 in sequence through the heat dissipation holes 205, the buffer cavity 206, and the vent holes 207, which can effectively prevent the large accumulation of heat inside the mounting cavity 200 and the resulting localized temperature process, thereby improving the safety and effectiveness of the control board 22 in operation.

[0118] Regarding fire resistance, by covering the top of the heat dissipation hole 205 with the buffer wall 232 and forming the vent 207 between one side of the buffer wall 232 and the top wall of the fire-resistant outer shell 23, the vent 207 and the heat dissipation hole 205 are staggered, preventing them from being directly opposite each other. When the electronic control board 22 is in an abnormal fire state, the buffer wall 232 can prevent flames and high-temperature hot air from directly entering the housing 1 through the heat dissipation hole 205, thereby reducing the escape of flames and hot air from the electronic control box assembly 2 to the outside through the heat dissipation hole 205.

[0119] Regarding waterproofing, since the electrical control box assembly 2 is usually installed in the same installation space as the outdoor heat exchanger 22 and the outdoor fan assembly 24, condensate is easily generated in its installation space when the air conditioner starts working. By covering the top of the heat dissipation hole 205 with the buffer wall 232 and preventing the vent 207 from being directly opposite the heat dissipation hole 205, condensate can be effectively prevented from directly entering the interior of the electrical control box assembly 2 through the heat dissipation hole 205.

[0120] like Figure 10 As shown, in some embodiments, the fire-resistant shell 23 may be provided with a communication port 208 opposite to the heat dissipation hole 205, and the communication port 208 connects the heat dissipation hole 205 and the buffer cavity 206.

[0121] In some embodiments, the buffer wall 232 may be arched, and its arched bottom wall may enclose to form a buffer cavity 206.

[0122] like Figure 10 As shown, in some embodiments, the buffer wall 232 may include a first buffer sidewall 2321, a second buffer sidewall 2322, and a third buffer sidewall 2323. One side of the first buffer sidewall 2321 is connected to one edge of the communication port 208, and the other side of the first buffer sidewall 2321 extends upward toward the refractory shell 23.

[0123] The second buffer sidewall 2322 is disposed above the heat dissipation hole 205, and one side of the second buffer sidewall 2322 is connected to the first buffer sidewall 2321.

[0124] The third buffer sidewall 2323 extends downward from the side of the second buffer sidewall 2322 away from the first buffer sidewall 2321, and the lower end of the third buffer sidewall 2323 is connected to the other side edge of the connecting port 208.

[0125] A buffer cavity 206 is formed between the first buffer sidewall 2321, the second buffer sidewall 2322 and the third buffer sidewall 2323, and a vent hole 207 is formed on one side edge of the first buffer sidewall 2321, the second buffer sidewall 2322, the third buffer sidewall 2323 and the connecting port 208.

[0126] The second buffer sidewall 2322 is connected between the upper ends of the first buffer sidewall 2321 and the third buffer sidewall 2323, so that the second buffer sidewall 2322 can be spaced apart on the top of the heat dissipation hole 205, and the buffer cavity 206 is located above the heat dissipation hole 205. Specifically, the second buffer sidewall 2322 directly covers the heat dissipation hole 205, thereby forming a shielding structure above the heat dissipation hole 205 and playing a shielding role, while not affecting the heat dissipation inside the electrical control box assembly 2.

[0127] When a fire breaks out in the electrical control box assembly 2 due to a short circuit, overload, or other reasons, the flames rise upwards. The first buffer sidewall 2321, the second buffer sidewall 2322, and the third buffer sidewall 2323 work together to restrict the spread of the flames from different directions, preventing the flames from directly escaping upwards through the heat dissipation holes 205 to other structural areas within the housing 1. Moreover, the arched structure formed by the first buffer sidewall 2321, the second buffer sidewall 2322, and the third buffer sidewall 2323 increases the path length for the flames to spread from the inside of the electrical control box assembly 2 to the outside. The flames need to bypass or pass through the heat dissipation holes 205 to reach the north and south sides of the buffer cavity 206, and then pass through the various sidewalls of the buffer wall 232 before reaching the outside through the side connection port 208. During this process, the energy of the flames is continuously consumed. The buffer wall 232 helps to reduce the speed and intensity of flame propagation.

[0128] In some embodiments, the lower ends of the first buffer sidewall 2321 and the third buffer sidewall 2323 are respectively connected to the opposite side walls of the communication port 208. A communication port 208 is formed between one side of the first buffer sidewall 2321, the second buffer sidewall 2322 and the third buffer sidewall 2323, and another communication port 208 is formed between the other side of the first buffer sidewall 2321, the second buffer sidewall 2322 and the third buffer sidewall 2323. These two communication ports 208 can be arranged opposite to each other, thereby improving the heat dissipation in the electrical control box assembly 2.

[0129] 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 by comprising: include: The housing, which is configured to form the outer casing of the air conditioner; An electrical control box assembly is disposed within the housing, and the electrical control box assembly includes: The mounting base has a mounting cavity inside, and at least one side of the mounting base has a mounting opening, which communicates with the mounting cavity; The electronic control board is located inside the mounting cavity; A fire-resistant outer shell, made of fire-resistant material, is provided on the outer side wall of the mounting base, excluding the mounting opening; A fire-resistant box cover, made of fire-resistant material, is provided on the mounting opening; The fire-resistant outer shell and the fire-resistant box cover form a box structure, and the mounting base is located inside the box structure. The mounting base has a connecting part located at the edge of the mounting opening, extending toward the outer periphery of the mounting opening, and the connecting part extends along the side edge of the mounting opening. The fire-resistant shell has a flange extending outward toward the outer periphery of the mounting opening at one edge near the connecting part, and the flange is located on the outside of the connecting part. The refractory box cover includes: A cover plate is provided on the mounting opening of the mounting base; The flanged portion extends from the peripheral edge of the cover plate toward the fire-resistant outer shell. The connecting part is encapsulated between the peripheral edge of the cover plate and the flange.

2. The air conditioner according to claim 1, characterized in that, The flanged portion covers the outside of the connecting portion and the flange, and forms a receiving groove between the flanged portion and the peripheral edge of the cover plate. The connecting portion and the flange are respectively received in the receiving groove.

3. The air conditioner according to claim 2, characterized in that, The flanged portion is located at the side edge of the top of the cover plate, and the flanged portion extends along the side edge of the top of the cover plate, and the receiving groove extends along the side edge of the top of the cover plate.

4. The air conditioner according to claim 3, characterized in that, The fire-resistant box cover includes an extension wall that extends from the side of the flange away from the cover plate toward the fire-resistant shell. The extension wall is located on the outside of the fire-resistant shell, and its length extends along the length of the edge of the receiving groove.

5. The air conditioner according to claim 4, characterized in that, The flanged portion includes: A first cover wall extends from the peripheral edge of the cover plate toward the mounting base, and the first cover wall is located above the connecting portion and the flange portion; The second covering wall extends downward from the side of the first covering wall away from the cover plate, and the first covering wall is located on the side of the connecting portion and the flange away from the cover plate; The receiving groove is formed between the peripheral edge of the cover plate, the first covering wall, and the second covering wall; The extended wall extends from the lower end of the second covering wall toward the side away from the cover plate.

6. The air conditioner according to claim 5, characterized in that, The connecting part is provided with an abutment rib on the side away from the cover plate, and the abutment rib is snapped onto the top wall of the fire-resistant shell.

7. The air conditioner according to claim 3, characterized in that, The connecting part is provided with an anti-detachment rib on the side away from the cover plate. The anti-detachment rib is located above the flange and is arranged vertically opposite to the flange. An anti-detachment groove is formed between the anti-detachment rib and the top wall of the mounting base, and the flange is located in the anti-detachment groove.

8. The air conditioner according to claim 3, characterized in that, The top wall of the mounting base is provided with a snap-fit ​​rib; The inner wall of the fire-resistant shell is recessed with a snap-fit ​​groove, the snap-fit ​​rib is snapped into the snap-fit ​​groove, and the snap-fit ​​groove covers the outer periphery of the snap-fit ​​rib.

9. The air conditioner according to claim 1, characterized in that, The top wall of the mounting base is provided with heat dissipation holes; The top wall of the fire-resistant shell is provided with a buffer wall, which covers the top of the heat dissipation hole, and a buffer cavity is formed between the bottom surface of the buffer wall and the top wall of the mounting base. The heat dissipation hole connects the buffer cavity and the mounting cavity. A vent is provided between one side of the buffer wall and the top wall of the refractory shell, and the vent connects the buffer cavity to the outside of the refractory shell.

10. The air conditioner according to claim 9, characterized in that, The fire-resistant outer shell is provided with a communication port opposite to the heat dissipation hole, and the communication port connects the heat dissipation hole and the buffer cavity; The buffer wall includes: The first buffer sidewall has one side connected to one side edge of the communication opening, and the other side of the first buffer sidewall extends upward toward the refractory shell. The second buffer sidewall is disposed above the heat dissipation hole, and one side of the second buffer sidewall is connected to the first buffer sidewall. The third buffer sidewall extends downward from the side of the second buffer sidewall away from the first buffer sidewall, and the lower end of the third buffer sidewall is connected to the other side edge of the communication opening. The buffer cavity is formed between the first buffer sidewall, the second buffer sidewall, and the third buffer sidewall, and the vent hole is formed on one side edge of the first buffer sidewall, the second buffer sidewall, the third buffer sidewall, and the communication port.

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