Ceiling type air conditioner

Abstract

The utility model discloses a kind of ceiling type air conditioners, the bottom of shell is formed with installation port;Heat exchanger is arranged in shell, heat exchanger is formed around return air passage;Fan is arranged in return air passage;Panel is set in the bottom of shell and covers installation port, panel is provided with return air port, return air port is communicated with return air passage, fan starts to form negative pressure relative to ambient pressure in return air passage and return air port;Electric appliance box is set on panel and is located at return air port, wall of electric appliance box is formed with air inlet gap and heat dissipation hole, air flows into the inner cavity of electric appliance box through air inlet gap, then flows out from heat dissipation hole.This scheme can improve the heat dissipation effect of electric appliance box.

Description

Technical Field

[0001] This utility model relates to the field of air conditioner technology, and in particular to a ceiling-mounted air conditioner. Background Technology

[0002] Air conditioners are common household appliances. They are categorized into floor-standing, wall-mounted, and ceiling-mounted types based on their installation method. Ceiling-mounted air conditioners, installed in the ceiling, make full use of ceiling space and are therefore widely used.

[0003] A ceiling-mounted air conditioner in the prior art includes a casing, inside which a heat exchanger and a fan are housed, and a panel is located at the bottom of the casing. The panel has a return air vent that connects to a return air duct inside the casing. The drive module for the motor (e.g., a fan drive motor, a deflector drive motor, etc.) is externally mounted, integrated onto a substrate within the electrical box. This results in a significant increase in heat dissipation from the substrate, necessitating improvements to the heat dissipation method of the electrical box.

[0004] The information disclosed in this background section is only intended to enhance the understanding of the background technology of this application, and therefore may include prior art that is not known to those skilled in the art. Summary of the Invention

[0005] In view of the problems pointed out in the background art, this utility model proposes a ceiling-mounted air conditioner to improve the heat dissipation effect of the electrical box.

[0006] To achieve the above-mentioned objectives, the present invention employs the following technical solution: In some embodiments of this application, a ceiling-mounted air conditioner is provided, wherein an installation opening is formed at the bottom of the outer casing; a heat exchanger is disposed in the outer casing, and a return air channel is formed around the heat exchanger; a fan is disposed in the return air channel; a panel is disposed at the bottom of the outer casing and covers the installation opening, and a return air inlet is provided on the panel, which is connected to the return air channel; the fan is activated to create a negative pressure relative to the ambient pressure in the return air channel and the return air inlet; an electrical box is disposed on the panel and located at the return air inlet, and an air inlet gap and a heat dissipation hole are formed on the wall of the electrical box, through which air flows into the inner cavity of the electrical box and then flows out from the heat dissipation hole.

[0007] The above technical solution has the following advantages or beneficial effects: This application places the electrical box at the return air vent on the panel, and forms an air intake gap and heat dissipation holes on the wall of the electrical box. When the fan starts, a negative pressure is formed at the return air vent due to the fan's suction. Under this negative pressure, outside air can enter the internal cavity of the electrical box through the air intake gap, carry the heat generated by the substrate, and then be discharged through the heat dissipation holes, forming a continuous and efficient air circulation heat dissipation path, significantly reducing the internal temperature of the electrical box, and effectively solving the problem of poor heat dissipation of the electrical box in the prior art.

[0008] This heat dissipation method cleverly utilizes the negative pressure created at the return air vent when the fan is working, eliminating the need for additional cooling fans or other equipment. While achieving efficient heat dissipation, it does not increase the energy consumption of the air conditioner, which aligns with the design concept of energy conservation and consumption reduction, and helps to enhance the product's market competitiveness.

[0009] By placing the electrical box at the return air vent, the space and airflow conditions of the return air vent are fully utilized. This eliminates the need for significant adjustments to the overall structure of the air conditioner, resulting in a more compact structure, a more rational layout, and easier manufacturing, installation, and maintenance.

[0010] In some embodiments of this application, the electrical box is disposed on the side near the mounting port, and the electrical box has heat dissipation holes on the side wall facing the return air vent.

[0011] Another technical solution among the above-mentioned technical solutions has the following advantages or beneficial effects: The electrical box is positioned near the mounting port, a location chosen to facilitate installation, inspection, and maintenance during air conditioner assembly via the mounting port on the bottom of the casing. When components inside the electrical box need inspection or replacement, it is not necessary to disassemble the entire panel or a large portion of the casing; operation can be conveniently performed from the mounting port, reducing maintenance costs and difficulty. Placing the ventilation holes on the side wall of the electrical box facing the return air vent maximizes the use of the negative pressure at the return air vent. When the fan is running, the negative pressure generated at the return air vent acts directly on the side wall where the ventilation holes are located, allowing hot air in the electrical box cavity to be discharged more quickly and smoothly through the ventilation holes. At the same time, cool air from the outside can also enter the cavity more efficiently through the air intake gap under the drive of negative pressure, forming stronger air convection and further enhancing the heat dissipation effect.

[0012] In some embodiments of this application, the side wall of the electrical box is provided with a plurality of spaced openings, the upper edge of the opening is provided with a downwardly extending first flange, and an air outlet gap is formed between the first flange and the side wall of the electrical box. The air outlet gap communicates with the opening and is open downwards.

[0013] Another technical solution among the above-mentioned technical solutions has the following advantages or beneficial effects: This application cleverly utilizes the natural upward tendency of flames. Because the air outlet gap faces downwards and the first flange extends downwards, when an accidental fire occurs inside the electrical box, the upward-spreading flames are blocked by the first flange, making it difficult for them to escape through the air outlet gap and opening. Even if a small number of flames attempt to spread upwards, they cannot break through due to the downward-facing design of the air outlet gap, thus effectively preventing the flames from spreading from the heat dissipation structure and reducing the risk of fire.

[0014] In some embodiments of this application, the electrical box includes a box body, an installation space is formed inside the box body, the bottom side of the installation space is open, and the heat dissipation holes are provided on the wall of the box body; The electrical box includes a cover configured to close the opening, and an air inlet gap is formed between the cover and the circumferential sidewall of the box.

[0015] Another technical solution among the above-mentioned technical solutions has the following advantages or beneficial effects: The electrical box structure of this application works efficiently with the negative pressure environment at the return air vent. When the fan is running, the negative pressure at the return air vent forces outside air into the electrical box through the air intake gap between the cover and the circumferential side wall of the box. The air intake gap is designed with reasonable dimensions to avoid excessive impurities entering due to excessive gap size, while ensuring sufficient airflow to ensure a continuous supply of cool air inside the electrical box. After the air entering the box fully exchanges heat with the heat-generating components, the heat-carrying air is discharged from the heat dissipation holes on the circumferential side wall of the box, forming a complete and efficient airflow circulation path, significantly improving heat dissipation efficiency and keeping components such as the motor drive module within a suitable operating temperature range. Furthermore, the circumferentially distributed air intake gaps allow air to enter evenly from all sides of the electrical box, avoiding uneven heat dissipation caused by insufficient local air intake. This creates a more balanced airflow within the box, ensuring full contact with heat-generating components in different locations and effectively removing heat from all areas, further improving the uniformity of heat dissipation.

[0016] In some embodiments of this application, the box body includes a top wall, and the top wall is provided with downwardly extending box body side walls around its perimeter; the cover body includes a bottom wall, and the bottom wall is provided with an upwardly extending second flange in the circumferential direction, and the air inlet gap is formed between the second flange and the box body side wall.

[0017] Another technical solution among the above-mentioned technical solutions has the following advantages or beneficial effects: The upward extension of the second flange allows it to form a relatively regular gap with the side wall of the enclosure, facilitating precise control of the air intake gap's dimensional accuracy and ensuring it remains consistently within the designed 0.5-0.6mm range. This precise gap control ensures sufficient outside air enters the electrical enclosure to meet the required airflow for heat dissipation, while effectively preventing larger dust particles and impurities from entering, reducing contamination of internal electronic components. Simultaneously, this structure ensures the air intake gap is evenly distributed along the circumference of the electrical enclosure, guaranteeing uniform airflow from all sides and preventing localized over- or under-airflow, further improving the uniformity of heat dissipation.

[0018] In some embodiments of this application, the side walls of the box body located at both ends in the length direction of the box body are a first side wall and a second side wall. The first side wall is inserted into the bottom wall, and the second side wall is fixedly connected to the bottom wall through a connector. The side walls of the box body located at both ends in the width direction of the box body are a third side wall and a fourth side wall. The air inlet gap is formed between the third side wall, the fourth side wall and the second flange.

[0019] Another technical solution among the above-mentioned technical solutions has the following advantages or beneficial effects: The first side wall and the bottom wall are connected by an interlocking mechanism, which enables quick positioning of the box and the cover, facilitating rapid alignment during assembly and improving installation efficiency. The second side wall is fixedly connected to the bottom wall by connectors (such as screws), which further strengthens the connection between the two based on the interlocking positioning, preventing the box and cover from separating or loosening due to vibration or other factors during air conditioner operation, and ensuring the stability of the overall structure.

[0020] The third and fourth side walls form an air intake gap with the second flange, making the air intake area more focused on both sides of the box width. This design can guide outside air into the area that is more conducive to heat dissipation, based on the heat distribution and airflow characteristics inside the electrical box.

[0021] In some embodiments of this application, a base is provided in the inner cavity of the electrical box, and a partition is provided on the base. The partition divides the internal space of the electrical box into a first space and a second space. A substrate is provided on the base located in the first space. A first wiring hole is provided on the partition, and the first wiring hole connects the first space and the second space. A second wiring hole is provided on the side wall of the electrical box, and the second wiring hole communicates with the second space.

[0022] Another technical solution among the above-mentioned technical solutions has the following advantages or beneficial effects: The partition divides the interior of the electrical box into a first space and a second space, clearly defining the functions. The first space is dedicated to placing the circuit board, providing an independent installation area for core heat-generating components such as the motor drive module, facilitating centralized heat dissipation and management. The second space serves as a wiring channel, specifically for the arrangement and fixing of electrical circuits, avoiding direct contact between the circuits and the electrical components on the circuit board. This reduces the risk of the circuits being damaged by high temperatures or malfunctions caused by poor contact, while also making the internal structure more organized and facilitating later maintenance. When the substrate in the first space accidentally catches fire, the partition effectively prevents the flames from spreading to the second space. Since the second space is connected to the outside through the second wiring hole, if flames enter the second space, they can easily spread to the outside of the electrical box through the second wiring hole, causing a larger fire. The partition's blocking function confines the flames within the first space, preventing them from spreading to the second space and the outside through the first wiring hole, significantly reducing the risk of fire spread and greatly improving the safety of the air conditioner. In some embodiments of this application, the base is made of a flame-retardant material.

[0023] Another technical solution among the above-mentioned technical solutions has the following advantages or beneficial effects: As a crucial structural component within the electrical box, the base, made of flame-retardant material, is not easily ignited by flames and can resist burning for a certain period. When the substrate in the first space accidentally catches fire, the base will not become an accelerant for the spread of flames, effectively preventing the fire from spreading from the bottom to other areas. In particular, the partition on the base already serves to separate the first and second spaces, and the flame-retardant material significantly enhances its fire-blocking ability. Even if flames come into contact with the partition, they can slow its burning rate, buying more time to control the fire and further reducing the risk of flames breaking through the partition and spreading to the second space. In some embodiments of this application, the electrical box is provided with a substrate, and the substrate is provided with a motor drive module and heat dissipation fins, the heat dissipation fins being arranged corresponding to the heat dissipation holes.

[0024] Another technical solution among the above-mentioned technical solutions has the following advantages or beneficial effects: The electrical box of this application contains a substrate, on which not only is a motor drive module integrated, but heat dissipation fins are also arranged corresponding to the heat dissipation holes. During the operation of the motor (such as a fan drive motor, a baffle drive motor, etc.), the motor drive module continuously generates heat. This heat is first transferred to the substrate, and the heat dissipation fins on the substrate can quickly absorb the heat transferred from the substrate, increasing the contact area with the air inside the electrical box. Because the heat dissipation fins are arranged corresponding to the heat dissipation holes, when air flows through the electrical box cavity under negative pressure, it will come into full contact with the heat dissipation fins. The heat on the heat dissipation fins is quickly carried away by the flowing air, and then the air carrying the heat is discharged from the electrical box through the heat dissipation holes. In this way, the heat generated by the motor drive module can be dissipated from the electrical box more efficiently, avoiding heat accumulation near the motor drive module, further reducing the operating temperature of the motor drive module, and ensuring that it always operates stably within a suitable temperature range. Other features and advantages of this utility model will become clearer after reading the detailed embodiments of this utility model in conjunction with the accompanying drawings. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a structural diagram of a ceiling-mounted air conditioner according to some embodiments; Figure 2 This is yet another structural diagram of a ceiling-mounted air conditioner according to some embodiments; Figure 3 This is a structural diagram of an electrical box according to some embodiments; Figure 4 This is yet another structural diagram of an electrical box according to some embodiments; Figure 5 for Figure 4 Enlarged view of section A in the middle; Figure 6 This is yet another structural diagram of an electrical box according to some embodiments; Figure 7 This is a top view of an electrical box according to some embodiments; Figure 8 for Figure 7 Sectional view along the BB direction; Figure 9 for Figure 8 Enlarged view of section C; Figure 10 This is a structural diagram of an electrical box according to some embodiments, omitting the cover. Figure 11 This is a structural diagram of a cover according to some embodiments; Figure 12 This is a structural diagram of a box according to some embodiments; Figure 13 This is a structural diagram of a base according to some embodiments.

[0027] Figure label: 10. Casing; 20. Fan; 30. Panel; 31. Return air vent; 32. Air outlet; 40. Return air duct; 50. Grille; 60. Electrical box; 70. Air guide plate; 100. Box body; 110. Top wall; 120. Box body side wall; 121. First side wall; 122. Second side wall; 123. Third side wall; 124. Fourth side wall; 125. Insertion extension flange; 130. Second wiring hole; 200. Cover; 210. Bottom wall; 211. Socket; 220. Second flange; 300, substrate; 310, heat sink fins; 400. Base; 410. Divider; 411. First wiring hole; 420. Wiring structure; 500. Ventilation vents; 510. First flange; 520. Exhaust gap; 600. Air inlet gap; 710. First Space; 720. Second Space; 800. Connectors. Detailed Implementation

[0028] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0029] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application 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 application.

[0030] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0031] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" 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 or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0032] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0033] The following disclosure provides many different embodiments or examples for implementing various structures of this invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of the invention. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, examples of various specific processes and materials are provided in this invention, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0034] In some embodiments of this application, a ceiling-mounted air conditioner is provided, as shown in the reference... Figure 1 and Figure 2 The device includes a housing 10, the bottom of which has a mounting opening. The bottom of the housing 10 is an open structure to form the mounting opening, through which the heat exchanger, fan 20 and water tray (not shown) are assembled into the housing 10.

[0035] The ceiling-mounted air conditioner also includes a heat exchanger (not shown), which is disposed within the housing 10 and configured to exchange heat with the flowing air. The heat exchanger surrounds and forms a return air duct 40. An air supply duct is formed between the heat exchanger and the inner wall of the housing 10.

[0036] The ceiling-mounted air conditioner also includes a fan 20, which is disposed within the return air duct 40. The heat exchanger has an annular structure to surround the fan 20.

[0037] Ceiling-mounted air conditioners also include a drip tray located at the bottom of the heat exchanger to collect condensate from the heat exchanger.

[0038] The ceiling-mounted air conditioner also includes a panel 30, which is located at the bottom of the outer casing 10 and covers the mounting opening. A return air vent 31 is provided on the panel 30, communicating with the return air duct 40. An air outlet 32 ​​is provided on the panel 30, communicating with the supply air duct. The fan 20 is activated to create a negative pressure relative to ambient pressure in the return air duct 40 and the return air vent 31. Figure 2 Panel 30 is omitted.

[0039] A grille 50 and a filter screen are installed at the return air vent 31 to filter the return air. An air guide plate 70 is installed at the air outlet 32 ​​to adjust the direction of the air outlet.

[0040] During the operation of the ceiling-mounted air conditioner, after the fan 20 is running, the outside air enters the return air duct 40 through the return air inlet 31. After the air exchanges heat with the heat exchanger, the heat-exchanged air is transported from the air supply duct to the air outlet 32. Finally, the heat-exchanged air is output to the indoor space from the air outlet 32.

[0041] In a current disclosed ceiling-mounted air conditioner, the drive module for the motor (e.g., fan-driven motor, air guide plate-driven motor, etc.) is externally mounted and integrated on a substrate inside the electrical box 60. This results in a sharp increase in the heat dissipated by the substrate, thus requiring an improvement in the heat dissipation method of the electrical box 60.

[0042] In some embodiments of this application, the ceiling-mounted air conditioner also includes an electrical box 60, see reference. Figures 2 to 4 , Figure 3 This is a structural diagram of the electrical box 60 viewed from the top side. Figure 4 This is a structural diagram of the electrical box 60 as viewed from the bottom side. The electrical box 60 is mounted on the panel 30 and located at the return air vent 31.

[0043] An air inlet gap 600 and a heat dissipation hole 500 are formed on the wall of the electrical box 60. Air flows into the inner cavity of the electrical box 60 through the air inlet gap and then flows out through the heat dissipation hole 500.

[0044] In other words, after the fan 20 is started, the negative pressure chamber formed by the fan 20 draws air in, and the negative pressure at the return air vent 31 causes the air in the inner cavity of the electrical box 60 to be discharged through the heat dissipation hole 500.

[0045] In existing technologies, the motor drive module is integrated onto the substrate within the electrical box 60, leading to a sharp increase in heat dissipation from the substrate and a significant heat dissipation problem. This technical solution places the electrical box 60 at the return air vent 31 of the panel 30, and forms an air inlet gap 600 and heat dissipation holes 500 on the wall of the electrical box 60. When the fan 20 starts, a negative pressure is created at the return air vent 31 due to the fan 20's suction. Under this negative pressure, outside air can enter the interior of the electrical box 60 through the air inlet gap 600, carrying the heat generated by the substrate and then being discharged through the heat dissipation holes 500, forming a continuous and efficient air circulation heat dissipation path. This significantly reduces the internal temperature of the electrical box 60 and effectively solves the problem of poor heat dissipation in the electrical box 60 in existing technologies.

[0046] This heat dissipation method cleverly utilizes the negative pressure formed at the return air vent 31 when the fan 20 is working, eliminating the need for additional cooling fan 20 and other equipment. While achieving efficient heat dissipation, it does not increase the energy consumption of the air conditioner, which is in line with the design concept of energy saving and consumption reduction and helps to enhance the product's market competitiveness.

[0047] By placing the electrical box 60 at the return air vent 31, the space and airflow conditions of the return air vent 31 are fully utilized, eliminating the need for significant adjustments to the overall structure of the air conditioner. This results in a more compact structure, a more rational layout, and easier manufacturing, installation, and maintenance.

[0048] The electronic components (especially the drive module) inside the electrical box 60 are highly sensitive to operating temperature. Excessive temperature can easily lead to performance degradation, unstable operation, or even malfunction. This technical solution optimizes the heat dissipation structure to ensure that the temperature inside the electrical box 60 is maintained within a reasonable range, reducing the risk of electronic component failure due to high temperatures, thereby improving the overall stability and reliability of the ceiling-mounted air conditioner.

[0049] Sustained high temperatures accelerate the aging process of electronic components and shorten the lifespan of equipment. This technical solution, through efficient heat dissipation design, reduces the operating temperature of electronic components inside the electrical box 60, slows down component aging, and thus extends the lifespan of the entire ceiling-mounted air conditioner, reducing users' maintenance and replacement costs.

[0050] In some embodiments of this application, reference is made to Figure 10The electrical box 60 is provided with a base plate 300, on which a motor drive module and heat dissipation fins 310 are provided, and the heat dissipation fins 310 are provided corresponding to the heat dissipation holes 500.

[0051] The electrical box 60 of this application contains a substrate 300, which integrates not only a motor drive module but also heat dissipation fins 310 corresponding to the heat dissipation holes 500. When the ceiling-mounted air conditioner is started, the fan 20 starts working, creating a negative pressure relative to the ambient pressure at the return air vent 31. At this time, under the action of negative pressure, outside air flows into the inner cavity of the electrical box 60 through the air inlet gap 600 on the wall of the electrical box 60.

[0052] During the operation of the motor drive module (such as the fan 20 drive motor, the air guide plate 70 drive motor, etc.), heat is continuously generated. This heat is first transferred to the substrate 300, and the heat dissipation fins 310 on the substrate 300 can quickly absorb the heat transferred from the substrate 300, increasing the contact area with the air in the inner cavity of the electrical box 60.

[0053] Because the heat dissipation fins 310 are positioned corresponding to the heat dissipation holes 500, when air flows through the inner cavity of the electrical box 60 under negative pressure, it will come into full contact with the heat dissipation fins 310. The heat on the heat dissipation fins 310 is quickly carried away by the flowing air, and then the air carrying the heat is discharged from the electrical box 60 through the heat dissipation holes 500.

[0054] In this way, the heat generated by the motor drive module can be dissipated more efficiently from the electrical box 60, avoiding heat accumulation near the motor drive module, further reducing the operating temperature of the motor drive module, and ensuring that it always operates stably within a suitable temperature range.

[0055] Meanwhile, this structural design makes the heat dissipation process more targeted, with a shorter heat transfer path and higher efficiency. Compared with the method of relying solely on the air inlet gap 600 and heat dissipation holes 500 on the wall of the electrical box 60 for heat dissipation, it can more effectively deal with the large amount of heat generated by the motor drive module, thereby further improving the heat dissipation performance of the electrical box 60, ensuring the overall stability and reliability of the ceiling-mounted air conditioner, and extending the service life of the equipment.

[0056] In some embodiments of this application, reference is made to Figure 2 The electrical box 60 is fixed to the panel 30 by means of snap-fit, screws, etc. The electrical box 60 is generally rectangular in shape. The electrical box 60 is located on the side near the mounting port, and the electrical box 60 has heat dissipation holes 500 on the side wall facing the return air vent 31.

[0057] The electrical box 60 of this application is generally rectangular. This regular shape design is conducive to making full use of the space on the panel 30. Especially in the limited installation area at the return air vent 31, the rectangular structure can more rationally arrange the internal components such as the substrate 300 and heat dissipation fins 310, making the spacing between the components more uniform, facilitating the smooth flow of air in the inner cavity of the electrical box 60, reducing airflow resistance, and improving heat dissipation efficiency.

[0058] The electrical box 60 is positioned near the mounting port, a location chosen to facilitate installation, inspection, and maintenance of the electrical box 60 via the mounting port at the bottom of the outer casing 10 during air conditioner assembly. When it is necessary to inspect or replace components inside the electrical box 60, it is not necessary to disassemble the entire panel 30 or a large portion of the outer casing 10; the operation can be conveniently performed from the mounting port, reducing maintenance costs and difficulty.

[0059] By placing the heat dissipation vent 500 on the side wall of the electrical box 60 facing the return air vent 31, the negative pressure at the return air vent 31 can be utilized to the maximum extent. When the fan 20 is running, the negative pressure formed at the return air vent 31 will directly act on the side wall where the heat dissipation vent 500 is located, so that the hot air in the inner cavity of the electrical box 60 can be discharged from the heat dissipation vent 500 more quickly and smoothly. At the same time, the cold air from the outside can also enter the inner cavity more efficiently through the air inlet gap 600 under the drive of negative pressure, forming stronger air convection, further enhancing the heat dissipation effect, ensuring that components such as the motor drive module are always at a suitable operating temperature, and ensuring the stable operation and service life of the air conditioner.

[0060] In some embodiments of this application, reference is made to Figure 3 and Figure 8 The electrical box 60 has multiple spaced openings (not shown) arranged sequentially along the height of the electrical box 60. Each opening has a downward-extending first flange 510 at its upper edge. An air outlet gap 520 is formed between the first flange 510 and the side wall of the electrical box 60, communicating with the opening and opening downwards.

[0061] Because flames naturally rise during combustion, the heat dissipation vent 500 is designed as an open, downward-facing louver structure to prevent flames from escaping through it. This electrical box 60, while improving heat dissipation, also incorporates fire prevention measures to enhance safety.

[0062] The electrical box 60 of this application has multiple openings arranged sequentially along its height, providing ample channels for airflow within the electrical box 60. When the fan 20 operates, creating negative pressure at the return air vent 31, hot air from the electrical box 60 can enter the air outlet gap 520 through the openings and exit from the downward-facing air outlet gap 520. This multi-opening, height-distributed design adapts to the heat distribution at different heights within the electrical box 60, ensuring efficient exhaust of hot air from each area and further improving the uniformity and efficiency of heat dissipation. Simultaneously, the first flange 510 does not obstruct downward airflow, allowing hot air to smoothly exit through the air outlet gap 520 under negative pressure, maintaining good heat dissipation performance.

[0063] This structure cleverly utilizes the natural upward tendency of flames. Because the air outlet gap 520 is open downwards and the first flange 510 extends downwards, when an accidental fire occurs inside the electrical box 60, the upward-spreading flames will be blocked by the first flange 510, making it difficult for them to escape through the air outlet gap 520 and the opening. Even if a small number of flames attempt to spread upwards, they will be unable to break through due to the downward-facing design of the air outlet gap 520, thus effectively preventing the flames from spreading from the heat dissipation structure and reducing the risk of fire.

[0064] Furthermore, this structural design achieves fire resistance without excessively obstructing the heat dissipation channels, ensuring a synergistic effect between heat dissipation and fire prevention. During daily operation, the air conditioner efficiently dissipates heat from the electrical box 60 through its well-designed openings and air outlet gaps (520mm), ensuring stable operation of components such as the motor drive module. It also provides effective fire protection in the event of a sudden fire, significantly improving the safety of the ceiling-mounted air conditioner and providing users with more reliable protection.

[0065] In some embodiments of this application, the electrical box 60 includes a box body 100. Figure 12 This is a structural diagram of a housing 100. An installation space is formed within the housing 100, and the bottom side of the installation space is open. The heat dissipation holes 500 are provided on the walls of the housing 100. For example, the heat dissipation holes 500 are provided on the circumferential side walls of the housing 100.

[0066] The electrical box 60 also includes a cover 200. Figure 11 This is a structural diagram of a cover 200. The cover 200 is disposed on the bottom side of the box body 100, and the cover 200 is configured to close the opening.

[0067] Reference Figures 7 to 9 An air inlet gap 600 is formed between the cover 200 and the circumferential sidewall of the box 100. For example, the air inlet gap 600 is 0.5-0.6 mm. By setting the circumferential air inlet gap 600, sufficient airflow is ensured inside the electrical box 60.

[0068] The mounting space of the housing 100 provides a stable area for components such as the substrate 300, motor drive module, and heat sink fins 310. The open design on the bottom side facilitates the quick assembly and subsequent maintenance of these internal components. After the components are installed, the cover 200 closes the opening, effectively preventing external dust, moisture, and other impurities from entering the mounting space. This avoids impurities adhering to the surface of electronic components, affecting their performance, or even causing short circuits and other malfunctions, thus providing reliable protection for the internal components and extending their service life.

[0069] The structure of the electrical box 60 in this application works efficiently with the negative pressure environment at the return air vent 31. When the fan 20 is running, the negative pressure at the return air vent 31 forces outside air into the electrical box 60 through the air intake gap 600 between the cover 200 and the circumferential side wall of the box 100. The 0.5-0.6mm gap size is rationally designed to avoid excessive impurities entering due to an excessively large gap, while ensuring sufficient air intake to ensure a continuous supply of cool air inside the electrical box 60. After the air entering the box fully exchanges heat with the heat-generating components, the air carrying heat will be discharged from the circumference of the box 100 to the heat dissipation holes 500 on the side wall, forming a complete and efficient airflow circulation path, significantly improving heat dissipation efficiency and keeping components such as the motor drive module within a suitable operating temperature range.

[0070] Furthermore, the circumferentially distributed air intake gaps 600 allow air to enter evenly from all sides of the electrical box 60, avoiding uneven heat dissipation caused by insufficient local air intake. The air forms a more balanced flow state within the box 100, allowing it to fully contact the heat-generating components in different locations, ensuring that heat is effectively carried away from all areas, and further improving the uniformity of heat dissipation.

[0071] In some embodiments of this application, reference is made to Figure 12 The box 100 shown includes a top wall 110, and the top wall 110 is provided with downwardly extending box side walls 120 around its perimeter.

[0072] Reference Figure 11 The cover 200 includes a bottom wall 210, and the bottom wall 210 has an upwardly extending second flange 220 in the circumferential direction. (Refer to...) Figure 9 The second flange 220 and the side wall 120 of the box body form the air inlet gap 600.

[0073] The top wall 110 of the box body 100 provides top support for the electrical box 60. The box body side walls 120 extending downwards around it form a stable frame structure with the top wall 110, enhancing the overall rigidity of the box body 100 and enabling it to better withstand the weight of internal components and vibrations generated during air conditioner operation. The bottom wall 210 of the cover 200 serves as the bottom foundation. The second flange 220 extending upwards circumferentially forms a complete bottom structure with the bottom wall 210. This not only enhances the structural strength of the cover 200 itself but also allows for precise matching with the box body side walls 120, ensuring the stability of the connection between the cover 200 and the box body 100 and preventing changes in the air inlet gap 600 due to assembly errors or vibrations.

[0074] The cooperation between the second flange 220 and the side wall 120 of the box plays a crucial role. The upward extension of the second flange 220 allows it to form a relatively regular gap with the side wall 120, facilitating the control of the dimensional accuracy of the air inlet gap 600 and ensuring that the air inlet gap 600 remains stable within the designed range of 0.5-0.6mm. This precise gap control ensures that sufficient outside air enters the electrical box 60 through the gap to meet the airflow required for heat dissipation, while effectively blocking larger dust and impurities from entering, reducing contamination of internal electronic components. Simultaneously, this structure ensures that the air inlet gap 600 is evenly distributed around the circumference of the electrical box 60, guaranteeing that air enters evenly from all sides, avoiding excessive or insufficient airflow in certain areas, and further improving the uniformity of heat dissipation.

[0075] The combination of the box side wall 120 and the second flange 220 forms a maze-like structure, which can, to a certain extent, prevent moisture, dust, and other contaminants from entering the electrical box 60 through the air inlet gap 600. The box side wall 120 extends downward and the second flange 220 extends upward. The nested layout of the two increases the length and difficulty of the path for impurities to enter, thereby better protecting the internal components such as the substrate 300 and the motor drive module, and reducing the probability of failure due to impurities.

[0076] Furthermore, the side wall 120 and the second flange 220 of the box body guide the incoming air. Under the negative pressure of the return air vent 31, the outside air enters through the air inlet gap 600 between the second flange 220 and the side wall 120 of the box body. Guided by the side wall 120 and the second flange 220, the outside air flows more smoothly into various areas inside the electrical box 60, making full contact with the internal heat-generating components, absorbing heat, and then being discharged from the heat dissipation holes 500 on the side wall 120 of the box body. This further optimizes the circulation path of the heat dissipation airflow and improves the heat dissipation efficiency.

[0077] In some embodiments of this application, reference is made to Figures 4 to 6The side walls 120 located at both ends of the box body 100 along its length are a first side wall 121 and a second side wall 122. The first side wall 121 is inserted into the bottom wall 210, and the second side wall 122 is fixedly connected to the bottom wall 210 through a connector 800.

[0078] The box body sidewalls 120 located at both ends of the box body 100 in the width direction are the third sidewall 123 and the fourth sidewall 124, and the air inlet gap 600 is formed between the third sidewall 123, the fourth sidewall 124 and the second flange 220.

[0079] The first side wall 121 and the bottom wall 210 are connected by a plug-in joint, enabling quick positioning of the box 100 and the cover 200, facilitating rapid alignment during assembly and improving installation efficiency. The second side wall 122 is fixedly connected to the bottom wall 210 via connectors 800 (such as screws), further strengthening the connection based on the plug-in positioning. This prevents the box 100 and cover 200 from separating or loosening due to vibration or other factors during air conditioner operation, ensuring the overall structural stability. This combination of plug-in and fixed connection balances ease of assembly and connection reliability, providing a stable installation environment for the internal components of the electrical box 60.

[0080] An air intake gap 600 is formed between the third sidewall 123, the fourth sidewall 124, and the second flange 220, making the air intake area more focused on both sides of the box 100 in the width direction. This design can guide outside air into the area that is more conducive to heat dissipation, based on the heat distribution and airflow characteristics inside the electrical box 60.

[0081] The air inlet gaps 600 corresponding to the third sidewall 123 and the fourth sidewall 124 can guide air to flow in along the width direction of the box 100, forming a more reasonable airflow path with the heat dissipation holes 500 on the sidewall 120 of the box. When the incoming cold air flows inside, it can more evenly cover the space in the width direction of the electrical box 60, and fully contact the substrate 300, motor drive module, heat dissipation fins 310 and other components. After carrying heat, it is discharged from the heat dissipation holes 500, forming an efficient convection circulation, further improving the heat dissipation effect, and ensuring that the internal components are at a suitable operating temperature.

[0082] In some embodiments of this application, reference is made to Figure 12 An insertion extension flange 125 is provided on the first sidewall 121, and the insertion extension flange 125 extends horizontally outward of the box body 100. (Refer to...) Figure 11 A socket 211 is provided on the bottom wall 210. (See reference...) Figure 5An extension flange 125 is inserted into the socket 211. After the extension flange 125 is inserted into the socket 211, a gap is formed at the socket 211, which serves as an air inlet gap 600. This air inlet gap 600 is located on the bottom side of the electrical box 60.

[0083] The engagement of the extended flange 125 with the socket 211 provides a precise positioning reference for the connection between the box body 100 and the cover 200. During assembly, inserting the extended flange 125 into the socket 211 quickly aligns the first side wall 121 with the bottom wall 210, preventing positional misalignment during assembly and significantly improving the assembly efficiency of the box body 100 and the cover 200. Simultaneously, the insertion structure itself provides a certain degree of pre-fixation, laying a stable foundation for the subsequent fixing of the second side wall 122 via the connector 800, ensuring the accuracy and robustness of the overall assembly.

[0084] The air intake gap 600 formed at the socket 211 is located on the bottom side of the electrical box 60, complementing the air intake gaps 600 at the third side wall 123 and the fourth side wall 124. When the fan 20 operates, creating negative pressure at the return air vent 31, outside air can enter not only through the air intake gaps 600 in the width direction of the third and fourth side walls 124, but also supplementally flow in through the bottom air intake gap 600. The bottom air intake can directly act on components in the lower area inside the electrical box 60, such as the bottom of the substrate 300 or the heating elements near the bottom wall 210, allowing cool air to more comprehensively cover the internal space and avoid heat dissipation dead zones. This multi-directional air intake design further improves the airflow volume and airflow uniformity, enhances the overall heat dissipation effect, and ensures that components such as the motor drive module are at a suitable operating temperature throughout the entire area.

[0085] In addition, the structural design cleverly utilizes the assembly gap to achieve the air intake function, eliminating the need for additional air intake holes, simplifying the processing technology of the box body 100 and the cover body 200, and reducing production and manufacturing costs.

[0086] An air intake gap 600 is also formed between the first sidewall 121 and the second flange 220 on the corresponding side of the cover 200, which further increases the air intake and improves the heat dissipation effect of the electrical box 60.

[0087] In some embodiments of this application, reference is made to Figure 10 A base 400 is provided inside the cavity of the electrical box 60. Figure 13 This is a structural diagram of the base 400. The base 400 is provided with a partition 410, which divides the internal space of the electrical box 60 into a first space 710 and a second space 720. The first space 710 and the second space 720 are arranged sequentially along the length of the electrical box 60.

[0088] A substrate 300 is disposed on the base 400 located in the first space 710. A first wiring hole 411 is disposed on the partition 410, and the first wiring hole 411 connects the first space 710 and the second space 720.

[0089] The electrical box 60 has a second wiring hole 130 on its side wall, which connects the external space and the second space 720.

[0090] External electrical lines enter the second space 720 through the second wiring hole 130, and then enter the first space 710 through the first wiring hole 411 to connect with the corresponding electrical components on the substrate 300.

[0091] A wire fixing structure 420 is provided on the base 400 located in the second space 720 to fix the wires passing through.

[0092] The partition 410 constitutes a fireproof structure. The first space 710 is equipped with a substrate 300, and the second space 720 is used for wiring. The second space 720 serves as a fireproof space. While meeting the requirements for wiring and fixing the wire harness, it prevents the flammable components on the substrate 300 from spreading to the second wiring hole 130 after combustion, thereby preventing the flame from spreading to the outside of the electrical box 60 and causing a fire accident.

[0093] The partition 410 divides the interior of the electrical box 60 into a first space 710 and a second space 720, achieving a clear functional division. The first space 710 is specifically used to place the substrate 300, providing an independent installation area for core heat-generating electrical components such as the motor drive module, facilitating centralized heat dissipation and management. The second space 720 serves as a wiring channel, specifically for the arrangement and fixing of electrical circuits, avoiding direct contact between the circuits and electrical components on the substrate 300, reducing the risk of circuit damage from high temperatures or malfunctions due to poor contact, while also making the internal structure more organized and facilitating later maintenance.

[0094] The partition 410 plays a crucial role as a fire-resistant structure. When the substrate 300 in the first space 710 accidentally catches fire, the partition 410 effectively prevents the flames from spreading to the second space 720. Since the second space 720 is connected to the outside through the second wiring hole 130, if flames enter the second space 720, they can easily spread to the outside of the electrical box 60 through the second wiring hole 130, causing a larger fire. The partition 410's blocking effect confines the flames within the first space 710, preventing them from spreading to the second space 720 and the outside through the first wiring hole 411, significantly reducing the risk of fire spread and greatly improving the safety of the air conditioner.

[0095] External wiring enters the second space 720 through the second wiring hole 130, and then enters the first space 710 through the first wiring hole 411 to connect with the substrate 300, forming an orderly wiring path. The wire fixing structure 420 in the second space 720 can fix the wiring, preventing it from loosening, falling off, or rubbing against each other due to vibration during air conditioner operation, ensuring the stability and reliability of the wiring connection, and reducing electrical faults caused by wiring problems. At the same time, the orderly wiring method also facilitates later inspection and maintenance of the wiring, improving maintenance efficiency.

[0096] Furthermore, this structural design reduces the impact of the wiring on the airflow for heat dissipation within the first space 710. Since the wiring is concentrated in the second space 720, the airflow within the first space 710 is not excessively obstructed by the wiring, ensuring that cool air can smoothly contact the substrate 300 and heat dissipation components, maintaining good heat dissipation performance, and guaranteeing the stable operation of the electrical components on the substrate 300.

[0097] In some embodiments of this application, the base 400 is made of a flame-retardant material.

[0098] As a crucial structural component within the electrical box 60, the base 400, made of flame-retardant material, is not easily ignited by flames and can resist burning for a certain period. When the substrate 300 within the first space 710 accidentally combusts, the base 400 will not become an accelerant for the spread of flames, effectively preventing the fire from spreading from the bottom to other areas. In particular, the partition 410 on the base 400 already serves as a fire barrier separating the first space 710 and the second space 720. The flame-retardant material significantly enhances its fire-blocking ability; even if flames come into contact with the partition 410, it slows down the rate of burning, buying more time to control the fire and further reducing the risk of flames breaking through the partition 410 and spreading to the second space 720.

[0099] The flame-retardant properties of the base 400, the fire-resistant function of the partition 410, and the downward-facing open air outlet gap 520 form multiple fire protection measures. When a fire hazard occurs, the flame-retardant base 400 reduces the possibility of its own combustion, works with the partition 410 to block the spread of flames, and the air outlet gap 520 prevents flames from escaping. These features enhance the fire safety of the electrical box 60 and the entire ceiling-mounted air conditioner from multiple dimensions, providing more reliable protection for the lives and property of users.

[0100] In the description of the above embodiments, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0101] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A ceiling-mounted air conditioner, characterized in that, Including: The outer casing has a mounting opening formed at its bottom; A heat exchanger disposed in the housing, the heat exchanger being configured to exchange heat with a flowing airflow, the heat exchanger surrounding a return air passage. A fan, wherein the fan is disposed within the return air duct; Its characteristic is that it further includes: A panel is provided at the bottom of the housing and covers the mounting port. The panel is provided with a return air vent, which is connected to the return air duct. The fan is activated to create a negative pressure relative to the ambient pressure in the return air duct and the return air vent. An electrical box is disposed on the panel and located at the air return vent. An air inlet gap and a heat dissipation hole are formed on the wall of the electrical box. Air flows into the inner cavity of the electrical box through the air inlet gap and then flows out through the heat dissipation hole.

2. The ceiling-mounted air conditioner according to claim 1, characterized in that, The electrical box is located on the side near the mounting port, and the electrical box has heat dissipation holes on the side wall facing the return air vent.

3. The ceiling-mounted air conditioner according to claim 1, characterized in that, The side wall of the electrical box is provided with a plurality of spaced openings. The upper edge of the opening is provided with a first flange extending downward. An air outlet gap is formed between the first flange and the side wall of the electrical box. The air outlet gap is connected to the opening and is open downward.

4. The ceiling-mounted air conditioner according to claim 1, characterized in that, The electrical box includes: The box body has an installation space formed inside it, the bottom side of the installation space is open, and the heat dissipation holes are provided on the wall of the box body; A cover, configured to close the opening, with the air inlet gap formed between the cover and the circumferential sidewall of the box.

5. The ceiling-mounted air conditioner according to claim 4, characterized in that, The box shown includes a top wall, and the top wall is surrounded by downward-extending box side walls. The cover includes a bottom wall, and the bottom wall has a second flange extending upward in the circumferential direction, and the air inlet gap is formed between the second flange and the side wall of the box.

6. The ceiling-mounted air conditioner according to claim 5, characterized in that, The side walls of the box located at both ends along the length of the box are a first side wall and a second side wall. The first side wall is inserted into the bottom wall, and the second side wall is fixedly connected to the bottom wall through a connector. The side walls of the box located at both ends in the width direction of the box are the third side wall and the fourth side wall, and the air inlet gap is formed between the third side wall, the fourth side wall and the second flange.

7. The ceiling-mounted air conditioner according to any one of claims 1 to 6, characterized in that, A base is provided in the inner cavity of the electrical box, and a partition is provided on the base. The partition divides the internal space of the electrical box into a first space and a second space. A substrate is provided on the base located in the first space, and a first wiring hole is provided on the partition, which connects the first space and the second space. A second wiring hole is provided on the side wall of the electrical box, and the second wiring hole is connected to the second space.

8. The ceiling-mounted air conditioner according to claim 7, characterized in that, The base is made of flame-retardant material.

9. The ceiling-mounted air conditioner according to any one of claims 1 to 6, characterized in that, The electrical box contains a base plate, on which a motor drive module and heat dissipation fins are mounted, with the heat dissipation fins corresponding to the heat dissipation holes.

10. A ceiling-mounted air conditioner, characterized in that, Including: The outer casing has a mounting opening formed at its bottom; A heat exchanger disposed in the housing, the heat exchanger being configured to exchange heat with a flowing airflow, the heat exchanger surrounding a return air passage. A fan, wherein the fan is disposed within the return air duct; Its characteristic is that it further includes: A panel is provided at the bottom of the housing and covers the mounting port. The panel is provided with a return air vent, which is connected to the return air duct. The fan is activated to create a negative pressure relative to the ambient pressure in the return air duct and the return air vent. An electrical box is disposed on the panel and located at the return air vent. An air inlet gap and heat dissipation holes are formed on the wall of the electrical box. The negative pressure at the return air vent allows the air in the inner cavity of the electrical box to be discharged through the heat dissipation holes.

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