ES2999347T3 - Ceiling cassette - Google Patents

Abstract

Ceiling cassette (100) comprising a surface housing (10) and a water receiving tray (20). A bottom of the surface housing (10) is open and a peripheral side of the surface housing (10) is connected to a first fixing structure (11). The water receiving tray (20) fits into the bottom of the surface housing (10), and a peripheral side of the water receiving tray (20) is provided with a second fixing structure (231) which is connected to the first fixing structure (11). The first fixing structure (11) is provided with a first installation hole (1121) and a pre-fixing groove (114), and the second fixing structure (231) is provided with a second installation hole (2311) and a pre-fixing hook (2312); When the pre-fixing hook (2312) is locked in the pre-fixing slot (114), the first installation hole (1121) and the second installation hole (2311) are aligned. (Automatic translation with Google Translate, no legal value)

Description

DESCRIPTION

Ceiling cassette

TECHNICAL FIELD

The present invention relates to the technical field of ceiling-mounted air conditioners and, more specifically, to a ceiling-mounted air conditioner.

BACKGROUND OF THE INVENTION

An indoor unit of a ceiling-mounted air conditioner is typically mounted on the top of a wall. The ceiling-mounted air conditioner consists of numerous parts. During assembly, when a drain pan is mounted on an outer casing, several mounting surfaces and mounting holes must be aligned. Aligning the mounting holes is time-consuming, and assembly is difficult, which affects assembly efficiency. Furthermore, a gap easily exists between the drain pan and the outer casing after assembly is completed, which affects the airtightness of the ceiling-mounted air conditioner and easily causes condensation to form at a joint.

Document CN 201 348314 Y generally refers to a ceiling-mounted air conditioner.

SUMMARY

The scope of the invention is set forth in the claims. The objective of the present disclosure is to address, to some extent, at least one of the technical problems existing in the related art.

Therefore, one objective of the present disclosure is to provide a ceiling-mounted air conditioner. The ceiling-mounted air conditioner features quick alignment, high installation efficiency, and good air tightness.

The ceiling-mounted air conditioner according to embodiments of the present disclosure includes an outer casing, a housing cavity provided in the outer casing, an open bottom of the outer casing, an outer circumferential side of the outer casing connected to a first fixing structure; and a drain pan mounted adjacent to the bottom of the outer casing, an outer circumferential side of the drain pan being provided with a second fixing structure connected to the first fixing structure, where a first mounting hole and a prefixing groove are provided on the first fixing structure, a second mounting hole and a prefixing hook are provided on the second fixing structure, and when the prefixing hook is fastened in the prefixing groove, the first mounting hole is aligned with the second mounting hole.

The ceiling-mounted air conditioner according to the embodiments of the present disclosure enables the formation of a stable connection relationship between the drain pan and the outer casing through a mutual connection between the first fixing structure and the second fixing structure. By engaging the prefixing groove and the prefixing hook, the first mounting hole on the first fixing structure and the second mounting hole on the second fixing structure can be quickly aligned, which greatly increases the mounting efficiency.

Optionally, a plurality of first fixing structures are provided, the plurality of first fixing structures are arranged around the outer casing, and a plurality of second fixing structures corresponding respectively to the plurality of first fixing structures are arranged in a one-to-one manner around the drain pan.

The drain pan is provided with a reinforcing rib at a junction with the first fixing structure.

Optionally, the first fixing structure is a plate, and the first fixing structure includes a mounting section connected on an outer circumferential surface of the outer casing; a transverse extension section extending from a bottom of the mounting section in a direction opposite to the outer casing; the first mounting hole is provided on the transverse extension section; and a vertical extension section extending downward from a side of the transverse extension section away from the mounting section, where a horizontal width of the vertical extension section is smaller than that of the transverse extension section, a portion in which the vertical extension section is shorter than the transverse extension section constitutes the prefixing groove, the second fixing structure is mounted adjacent to a bottom of the transverse extension section, the prefixing hook is fastened in the prefixing groove, and the vertical extension section is fastened on a side of the second fixing structure facing away from the outer casing.

Optionally, the pre-fixing hook is provided with a guide surface on one side towards the cross-sectional extension.

Optionally, an upper surface of the cross-sectional extension is provided with a convex edge surrounding the first mounting hole, and the convex edge is formed in one piece on the cross-sectional extension by stamping.

Optionally, an inner side of the outer casing is provided with an insulating casing having the same shape as the outer casing, and the drain pan is connected by a lower part of the insulating casing.

Optionally, the drain pan includes a center pan disposed beneath an evaporator of the ceiling-mounted air conditioner; a plurality of circumferentially connected portions spaced circumferentially apart on an outer side of the center pan, the plurality of circumferentially connected portions being connected beneath the insulating casing and connected on an inner circumferential surface of the outer casing; and a plurality of connecting portions each connected between the center pan and the circumferentially connected portions, wherein each of the circumferentially connected portions is provided with the second fixing structure.

Optionally, a plurality of joints are provided on a circumferential wall of the insulating casing, each of the joints is open downward, and at least part of the upper surfaces of the joints are arcuate surfaces, the circumferentially connected portions are fitted into the joints, and the upper surfaces of the circumferentially connected portions are closely fitted to the upper surfaces of the joints.

Optionally, the upper surfaces of the circumferentially connected portions form an arcuate surface curved downward at each of two circumferential ends.

Additional aspects and advantages of the present disclosure will be set forth in part in the following descriptions, will be apparent in part from the following descriptions, or will be learned from practicing embodiments of the present disclosure.

BRIEF DESCRIPTION OF THE DRAWINGS

Figure 1 is a schematic diagram of a three-dimensional structure of a ceiling-mounted air conditioner according to an embodiment of the present disclosure;

Figure 2 is a schematic diagram of a drain pan, an outer casing, and an insulating casing of a ceiling-mounted air conditioner according to an embodiment of the present disclosure. Figure 3 is a schematic structural diagram of the arrangement of a drain pan and an insulating casing of a ceiling-mounted air conditioner according to an embodiment of the present disclosure.

Figure 4 is a schematic diagram of an upper structure of a drain pan according to an embodiment of the present disclosure.

Figure 5 is a partial schematic diagram of a second fixing structure at a corner of a drain pan according to an embodiment of the present disclosure.

Figure 6 is a partial cross-sectional view of a section A-A of Figure 5.

Figure 7 is a schematic diagram of a general structure of a first fixing structure according to an embodiment of the present disclosure.

Reference numerals: ceiling-mounted air conditioner 100; outer casing 10; housing cavity 101; air outlet 102; first fixing structure 11; mounting section 111; transverse extension section 112; first mounting hole 1121; convex edge 1122; vertical extension section 113; prefixing groove 114; carrier plate 115; drain pan 20; center pan 21; air inlet 211; connecting portion 22; circumferential connecting portion 23; second fixing structure 231; second mounting hole 2311; prefixing hook 2312; reinforcing rib 2313; guide surface 2314; curved arcuate surface 232; insulating casing 30; gasket 31.

DETAILED DESCRIPTION

Detailed reference will be made to embodiments of the present disclosure, and examples of embodiments are illustrated in the drawings, where the same or similar elements and elements having the same or similar functions are indicated by similar reference numerals throughout the descriptions. The embodiments described herein with reference to the drawings are illustrative and are used solely to explain the present disclosure.

A ceiling-mounted air conditioner 100 according to an embodiment of the present disclosure is described below in detail with reference to the accompanying drawings.

The ceiling-mounted air conditioner 100 according to an embodiment of the present disclosure, as shown in Fig. 1 and Fig. 3, includes an outer casing 10 and a drain pan 20.

As shown in Figure 1 and Figure 3, the outer casing 10 is provided with a housing cavity 101, and the bottom of the outer casing 10 is open. An evaporator, a fan assembly, an auxiliary heating element, and other parts may be mounted in the housing cavity 101. The bottom is open to communicate with the housing cavity 101, for convenient mounting of the internal components.

As shown in Figure 3, an outer circumferential side of the outer casing 10 is connected to a first fixing structure 11.

As shown in Figures 1 to 3, the drain pan 20 is mounted adjacent to the bottom of the outer casing 10, and an outer circumferential side of the drain pan 20 is provided with a second fixing structure 231 connected to the first fixing structure 11. The drain pan 20 is mounted adjacent to an open side of the outer casing 10, so that parts present in the housing cavity 101 can be shielded and a sense of integrity of the ceiling-mounted air conditioner 100 is improved. The drain pan 20 can collect condensed water that condenses on the components of the ceiling-mounted air conditioner 100 in a cooling mode, to prevent the condensed water from directly falling onto the indoor floor and resulting in a bad user experience.

Specifically, as shown in Figure 2, Figure 3 and Figure 7, the first fixing structure 11 is provided with a first mounting hole 1121 and a pre-fixing groove 114.

As shown in Figure 2, Figure 3, Figure 4, Figure 5 and Figure 6, the second fixing structure 231 is provided with a second mounting hole 2311 and a pre-fixing hook 2312. When the pre-fixing hook 2312 is fastened in the pre-fixing groove 114, the first mounting hole 1121 is aligned with the second mounting hole 2311.

Here, since a prefixation is formed between the prefixing hook 2312 and the prefixing groove 114, a boundary is formed between the first fixing structure 11 and the second fixing structure 231, and the first mounting hole 1121 and the second mounting hole 2311 of the two are quickly aligned to facilitate fixing the bolt.

It can be understood that, compared with mounting a drain pan 20 of a conventional ceiling-mounted air conditioner 100 without a pre-fixing structure, the present disclosure improves the connection strength between the first fixing structure 11 and the second fixing structure 2312, thereby forming a stable connection relationship between the drain pan 20 and the outer casing 10. Also, the rapid alignment of the first mounting hole 1121 and the second mounting hole 2311 improves the mounting efficiency between the first fixing structure 11 and the second fixing structure 2312, thereby greatly improving the mounting efficiency between the drain pan 20 and the outer casing 10.

In some embodiments of the present disclosure, as shown in Figure 2, a plurality of first fixing structures 11 are provided, the plurality of first fixing structures 11 are arranged around the outer casing 10, and a plurality of second fixing structures 231 respectively corresponding to the plurality of first fixing structures are arranged one-to-one around the drain pan 20. The plurality of first fixing structures 11 are arranged on the outer casing 10 respectively, which can increase the connection points between the drain pan 20 and the outer casing 10, so that relatively stable connections are formed in all directions of the drain pan 20 and the outer casing 10, and a difference in mounting surface between the drain pan 20 and the outer casing 10 can be reduced, thereby preventing excessively skewed mounting of the drain pan 20.

Optionally, as shown in Figure 2, four first fixing structures 11 are provided. The first fixing structures 11 are evenly spaced at four corners of the outer casing 10 respectively. The drain pan 20 is also provided with four second fixing structures 231 corresponding to the first fixing structures 11. The number of the first fixing structures 11 and the number of the second fixing structures 231 can be selectively set in accordance with an actual need, as long as the stability and balance of the assembly and the aesthetics of the ceiling-mounted air conditioner 100 after assembly are ensured in case of no waste of costs and quick and convenient assembly.

As shown in Figure 3 and Figure 6, the drain pan 20 is provided with a reinforcing rib 2313 at a junction with the first fixing structure 11. The placement of the reinforcing rib 2313 increases the local strength of the second fixing structure 231, prevents cracking of the second fixing structure 231 and the first fixing structure 11 due to assembly, and increases the service life of the second fixing structure 231.

Advantageously, there are reinforcing ribs added around the second mounting hole 2311 to increase the strength adjacent to the second mounting hole 2311.

In some embodiments of the present disclosure, as shown in Figure 7, the first fixing structure 11 is a plate, and the first fixing structure 11 includes a mounting section 111, a transverse extension section 112 and a vertical extension section 113.

As shown in FIG. 2, the mounting section 111 is connected to an outer circumferential surface of the outer casing 10. The mounting section 111 causes the first fixing structure 11 to be stably mounted on a side surface of the outer casing 10, which is not easy to fall off. The mounting section 111 further increases a mounting area between the first fixing structure 11 and the outer casing 10. The mounting section 111 and the outer casing may be fixed by screw connection or by welding.

As shown in Figure 2, Figure 3 and Figure 7, the cross extension section 112 extends from the bottom of the mounting section 111 in a direction opposite to the outer casing 10, and the first mounting hole 1121 is provided above the cross extension section 112. The cross extension section 112 provides the first mounting hole 1121 with a surface protruding from the outer casing 10, so that the first fixing structure 11 and the second fixing structure 231 are more convenient to assemble and fit together, which facilitates manual operations and is easy to follow. Also, during fixing, the first fixing structure 11 and the second fixing structure 231 do not affect the strength of the outer casing 10 or damage the outer casing 10.

As shown in Fig. 2 and Fig. 7, the vertical extension section 113 extends downward from one side of the transverse extension section 112 away from the mounting section 111. A horizontal width of the vertical extension section 113 is smaller than that of the transverse extension section 112, and a portion where the vertical extension section 113 is shorter than the transverse extension section 112 constitutes the prefixing groove 114. A mounting groove is also formed between the downwardly extending vertical extension section 113 and the transverse extension section 112, which is suitable for cooperating with a mounting surface of the second fixing structure 231, so that the second fixing structure 231 is embedded in the mounting groove during prefixing, to accelerate the cooperation of the two.

Advantageously, an obtuse angle is formed between the vertical extension section 113 and the transverse extension section 112, and a left side of the vertical extension section 113 corresponds to a right side of the pre-fixing hook 2312. Such a design facilitates rapid pre-positioning.

As shown in Fig. 2 and Fig. 3, the second fixing structure 231 is mounted adjacent to the lower part of the transverse extension section 112, the prefixing hook 2312 is fastened in the prefixing groove 114, and the vertical extension section 113 is fastened on a side of the second fixing structure 231 facing away from the outer casing 10. The prefixing groove 114 facilitates forming a boundary structure corresponding to a fastening hook with the prefixing hook 2312.

Optionally, as shown in Figure 3, an upper surface of the cross-section extension 112 is provided with a convex edge 1122 surrounding the first mounting hole 1121, and the convex edge 1122 is integrally formed on the cross-section extension 112 by stamping. The convex edge 1122, on the one hand, can enhance the strength of the first mounting hole 1121, and on the other hand, also has a certain guiding effect, which facilitates guiding during mounting of bolts or screws.

Optionally, as shown in Figure 3 and Figure 7, the vertical extension section 113 extends in a direction away from the outer casing 10 to form another transverse extension section 112. This facilitates prefixing and limitation.

Optionally, as shown in Figure 3 and Figure 7, the mounting section 111 on one side of the vertical extension section 113 shorter than the transverse extension section 112 is provided with a carrier plate 115. An upper surface of the carrier plate 115 is in contact with the second fixing structure 231, which can increase a support degree of a lower surface of the second fixing structure 231 and prevent an upper mounting hole from falling off after the mounting fails. In addition, the carrier plate 115 fits with the vertical extension section 113 in a stepped manner. The carrier plate 115 can provide a certain guiding effect for the mounting of the second fixing structure 231.

Optionally, as shown in Figure 3, Figure 5 and Figure 6, the pre-fixing hook 2312 is provided with a guide surface 2314 on one side towards the cross-sectional extension 112. The arrangement of the guide surface 2314 facilitates the clamping of the pre-fixing hook 2312 on the pre-fixing groove 114.

In some embodiments of the present disclosure, as shown in Figures 1 to 4, the drain pan 20 includes a central pan 21, a plurality of circumferentially connected portions 23 and a plurality of connecting portions 22.

The center tray 21 is arranged below an evaporator of the ceiling-mounted air conditioner 100, and is configured to receive water.

Optionally, an air inlet 211 is formed in the center of the center tray 21, and annular ridges are formed around the air inlet 211.

As shown in Fig. 1, Fig. 2 and Fig. 4, the plurality of circumferentially connected portions 23 are circumferentially spaced apart on an outer side of the center tray 21, the plurality of circumferentially connected portions 23 are connected below the insulating casing 30 and connected on an inner circumferential surface of the outer cover 10, and each of the circumferentially connected portions 23 is provided with the second fixing structure 231. The circumferentially connected portions 23 provide connection points for the second fixing structure 231, so that the second fixing structure 231 can correspond to the cross-sectional extension 112.

Each connecting portion 22 is connected between the center tray 21 and the circumferentially connected portions 23. The connecting portions 22 cause the circumferentially connected portions 23 to extend in an appropriate direction, and the center tray 21 does not have to be provided with the connecting portions 22 throughout.

As shown in Fig. 1, an air outlet 102 communicating with the accommodation cavity 101 is formed between adjacent connecting portions 22, a side edge of the center tray 21 and the outer casing 10. The air outlet 22 can feed back a flow of air after heat exchange inside.

In some embodiments of the present disclosure, as shown in Figure 2 and Figure 3, an inner side of the outer casing 10 is provided with an insulating casing 30 having the same shape as the outer casing 10, and the drain pan 20 is connected by the bottom of the insulating casing 30.

As shown in Fig. 3, a circumferential wall of the insulating casing 30 is provided with a plurality of joints 31, each of the joints 31 is open downward, and at least part of the upper surfaces of the joints 31 are arcuate surfaces, the circumferentially connected portions 23 are fitted into the joints 31, and the upper surfaces of the circumferentially connected portions 23 closely fit the upper surfaces of the joints 31.

Accordingly, as shown in Figure 3, the upper surfaces of the circumferentially connected portions 23 form a downwardly curved arcuate surface 232 at each of two circumferential ends. The curved arcuate surface 232 mates with the joints 31, so that the drain pan 20 fits with the outer casing 10, and the joints have good air tightness. This reduces the formation of condensation on the outer casing 10 of the ceiling-mounted air conditioner 100 in the cooling mode. It is not easy for the air in the housing cavity 101 and the air outside the ceiling-mounted air conditioner 100 to form an exchange region beyond the air inlet 211 and the air outlet 102.

In order to better understand the solutions of the embodiments of the present disclosure, the structure of the ceiling-mounted air conditioner 100 in a specific embodiment of the present disclosure is described below with reference to Figures 1 to 7.

As shown in Figure 1 and Figure 3, the ceiling-mounted air conditioner 100 includes an outer casing 10, a drain pan 20, and an insulating casing 30.

As shown in Fig. 1 and Fig. 3, the upper part of the outer casing 10 is mounted on the upper part of a wall, and the lower part of the outer casing 10 is provided with the drain pan 20. The outer casing 10 is provided with an accommodation cavity 101, an air inlet 211 in communication with the accommodation cavity 101 and four air outlets 102 in communication with the accommodation cavity 101 are formed on the drain pan 20. An inner side of the outer casing 10 is provided with the insulating casing 30 having the same shape as the outer casing 10, an outer circumferential side of the outer casing 10 is connected to four first fixing structures 11, and an outer circumferential side of the drain pan 20 is connected to a second fixing structure 231 connected to the first fixing structures 11.

As shown in Fig. 2, Fig. 3 and Fig. 7, the first fixing structure 11 is a plate, and the first fixing structure 11 includes a mounting section 111, a transverse extension section 112 and a vertical extension section 113. The mounting section 111 is connected to an outer circumferential surface of the outer casing 10, the transverse extension section 112 extends from the bottom of the mounting section 111 in a direction opposite to the outer casing 10, and the first mounting hole 1121 is provided on the transverse extension section 112. The vertical extension section 113 extends downward from a side of the transverse extension section 112 away from the mounting section 111. A horizontal width of the vertical extension section 113 is smaller than that of the transverse extension section 112, and a portion where the vertical extension section 113 is shorter than the cross-sectional extension 112 constitutes the prefixing slot 114.

As shown in FIG. 1 , FIG. 2 , FIG. 3 , and FIG. 4 , the drain pan 20 includes a center pan 21, four circumferentially connected portions 23, and eight connecting portions 22. The center pan 21 is disposed beneath an evaporator of the ceiling-mounted air conditioner 100, each connecting portion 22 is connected between the center pan 21 and the circumferentially connected portions 23, the plurality of circumferentially connected portions 23 are circumferentially spaced apart on an outer side of the center pan 21, the plurality of circumferentially connected portions 23 are connected beneath the insulating casing 30 and connected on an inner circumferential surface of the outer casing 10, and each circumferentially connected portion 23 is provided with the second fixing structure 231. The upper surfaces of the circumferentially connected portions 23 form an arcuate surface. curved downwards 232 at each of two circumferential ends, and the curved arcuate surface 232 coincides with the joints 31 on the insulating casing 30.

As shown in Figure 2, Figure 3, Figure 4, Figure 5 and Figure 6, the second fixing structure 231 is provided with a second mounting hole 2311 and a pre-fixing hook 2312. When the pre-fixing hook 2312 is fastened in the pre-fixing groove 114, the first mounting hole 1121 is aligned with the second mounting hole 2311.

A contact area between the drain pan 20 and the insulating housing 30 is small, the arched surface is recessed and the seal is tight.

Thus, the ceiling-mounted air conditioner 100 of the present disclosure can reduce the materials of ground wires, isolate the contact of wire bodies with foam, and have a high degree of fireproofing.

In describing the present disclosure, it is to be understood that terms such as "top," "bottom," "left," "right," "vertical," "horizontal," "upper," "lower," "inner," "outer," and "circumferential" are to be construed as referring to the orientation as described or shown in the disclosed drawings. These relative terms are for convenience of description and do not require that the present disclosure be construed or operated in any particular orientation, and therefore cannot be construed as limiting the present disclosure.

Likewise, the characteristic defined by "first" and "second" may include one or more of this characteristic explicitly or implicitly, which are used to distinguish and describe features without distinction of order or importance.

In the description of this disclosure, “a plurality of” means two or more than two, unless otherwise specified.

In describing this disclosure, it should be noted that, unless otherwise specified or limited, the terms "mounted," "connected," "coupled," and the like are used broadly and may include, for example, fixed connections, detachable connections, or integral connections; they may also be mechanical or electrical connections; they may also be direct connections or indirect connections through intermediate structures; they may also be internal communications between two elements. Those skilled in the art will be able to understand the above terms in accordance with specific situations.

Claims (9)

1. Ceiling-mounted air conditioner (100), comprising: an outer casing (10), a receiving cavity (101) provided in the outer casing (10), a bottom portion of the outer casing (10) open, an outer circumferential side of the outer casing (10) connected to a first fixing structure (11); and a drain pan (20) mounted adjacent to the lower part of the outer casing (10), an outer circumferential side of the drain pan (20) being provided with a second fixing structure (231) connected to the first fixing structure (11), where a first mounting hole (1121) and a pre-fixing groove (114) are provided on the first fixing structure (11), a second mounting hole (2311) and a pre-fixing hook (2312) are provided on the second fixing structure (231), and when the pre-fixing hook (2312) is held in the pre-fixing groove (114), the first mounting hole (1121) is aligned with the second mounting hole (2311); characterized in that the drain pan (20) is provided with a reinforcing rib (2313) at a junction with the first fixing structure (11). 2. Ceiling-mounted air conditioner according to claim 1, wherein a plurality of first fixing structures (11) are provided, the plurality of first fixing structures (11) are arranged around the outer casing (10), and a plurality of second fixing structures (231) corresponding respectively to the plurality of first fixing structures (11) in a one-to-one manner are arranged around the drain pan (20). 3. Ceiling-mounted air conditioner according to claim 1 or 2, wherein the first fixing structure (11) is a plate, and the first fixing structure (11) comprises: a mounting section (111) connected on an outer circumferential surface of the outer casing (10); a cross-extension section (112) extending from a bottom of the mounting section (111) in a direction opposite to the outer casing (10), the first mounting hole (1121) being disposed on the cross-extension section (112); and a vertical extension section (113) extending downward from one side of the transverse extension section (112) away from the mounting section (111), wherein a horizontal width of the vertical extension section (113) is smaller than a horizontal width of the transverse extension section (112), and a portion in which the vertical extension section (113) is shorter than the transverse extension section (112) constitutes the prefixing groove (114), where the second fixing structure (231) is mounted next to a lower part of the transverse extension section (112), the pre-fixing hook (2312) is fastened in the pre-fixing groove (114), and the vertical extension section (113) is fastened on a side of the second fixing structure (231) away from the outer casing (10). 4. Ceiling-mounted air conditioner according to claim 3, wherein the pre-fixing hook (2312) is provided with a guide surface (2314) on one side toward the cross-sectional extension (112). 5. Ceiling-mounted air conditioner according to claim 3 or 4, wherein an upper surface of the cross-extension section (112) is provided with a convex edge (1122) surrounding the first mounting hole (1121), and the convex edge (1122) is formed in one piece on the cross-extension section (112) by stamping. 6. Ceiling-mounted air conditioner according to any one of claims 1 to 5, wherein an inner side of the outer casing (10) is provided with an insulating casing (30) having the same shape as the outer casing (10), and the drain pan (20) is connected by a lower part of the insulating casing (30). 7. Ceiling-mounted air conditioner according to claim 6, wherein the drain pan (20) comprises: a central tray (21) arranged below an evaporator of the ceiling-mounted air conditioner (100); a plurality of circumferentially connected portions (23) spaced circumferentially apart on an outer side of the central tray (21), the plurality of circumferentially connected portions (23) being connected below the insulating casing (30) and connected on an inner circumferential surface of the outer casing (10); and a plurality of connecting portions (22) each connected between the central tray (21) and the circumferentially connected portions (23), where each of the circumferentially connected portions (23) is provided with the second fixing structure (231). 8. Ceiling-mounted air conditioner according to claim 7, wherein a plurality of joints (31) are provided on a circumferential wall of the insulating casing (30), each of the joints (31) is open downward, and at least part of the upper surfaces of the joints (31) are arcuate surfaces, circumferentially connected portions (23) are fitted into the joints (31), and upper surfaces of the circumferentially connected portions (23) closely fit the upper surfaces of the joints (31). 9. Ceiling-mounted air conditioner according to claim 7 or 8, wherein the upper surfaces of the circumferentially connected portions (23) form a downwardly curved arcuate surface (232) at each of two circumferential ends.