Overhead air conditioner

Abstract

The utility model discloses an overhead air conditioner which comprises a shell, and the shell comprises a side plate air inlet and a top plate air outlet. The air guide device is arranged in the shell; the air guide device comprises a flow guide ring, upper fan blades of the axial flow fan are arranged in the flow guide ring, and lower fan blades of the axial flow fan are arranged outside the flow guide ring; a bearing part of the mounting structure is provided with a sunken space matched with the axial flow fan, and the mounting structure is connected with the flow guide ring and the axial flow fan; and air enters from the side plate air inlet, sequentially passes through the space and the flow guide ring and is exhausted from the top plate air outlet. According to the embodiment of the utility model, the fan efficiency can be improved while the height of the air conditioning unit is reduced.

Description

TECHNICAL FIELD

[0001] The embodiment of the utility model relates to air conditioning technical field, specifically, relate to a top-mounted air conditioner. BACKGROUND

[0002] In order to reduce the floor area, the internal structure of the immersed liquid cooling energy storage system is designed to be compact. Therefore, the height of the equipment is relatively high, and the immersed liquid cooling chiller generally adopts a top-mounted layout. In order to reduce the height of the unit, reduce the instability or safety hazards caused by the high center of gravity, measures need to be taken to reduce the height of the unit.

[0003] However, the immersed liquid cooling chiller generally adopts an axial flow fan designed in a convex form, which limits the height reduction of the chiller. UTILITY MODEL CONTENT

[0004] Therefore, the embodiment of the utility model provides a top-mounted air conditioner, which aims to reduce the height of the air conditioning unit while improving the efficiency of the fan.

[0005] The embodiment of the utility model provides a top-mounted air conditioner, which comprises: a shell, the shell comprises a side plate air inlet and a top plate air outlet; an air guide device is arranged in the shell; wherein the air guide device comprises: a flow guide ring; an axial flow fan, the upper fan blade of the axial flow fan is arranged in the flow guide ring, and the lower fan blade of the axial flow fan is arranged outside the flow guide ring; a mounting structure, the receiving part of the mounting structure is provided with a space matched with the sinking arrangement of the axial flow fan, and the mounting structure is connected with the flow guide ring and the axial flow fan; wherein air enters from the side plate air inlet, passes through the space and the flow guide ring in turn, and is discharged from the top plate air outlet.

[0006] In some embodiments, further comprising: a heat exchanger, the heat exchanger comprises a wind passing heat exchange structure, and the heat exchanger is vertically arranged between the side plate air inlet and the air guide device and arranged along the length direction of the side plate air inlet; wherein the top of the axial flow fan is lower than the upper end surface of the heat exchanger, and / or the bottom of the axial flow fan is higher than the lower end surface of the heat exchanger.

[0007] In some embodiments, the heat exchanger is a micro-channel condenser, and the wind passing heat exchange structure is the gap between the condensing channels.

[0008] In some embodiments, the inner edge surface of the heat exchanger is close to the outer edge surface of the flow guide ring, or the inner edge surface of the heat exchanger is in close contact with the outer edge surface of the flow guide ring; the outer edge surface is in the shape of a cylindrical curved surface.

[0009] In some embodiments, the heat exchanger is two pieces, and the two pieces of heat exchanger surround the air guide device in an L shape; or the heat exchanger is two pieces, and the two pieces of heat exchanger surround the air guide device in an L shape and are connected through a curved heat exchange part.

[0010] In some embodiments, the flow guide ring comprises a connecting portion, the connecting portion comprises a closed inner edge and a closed outer edge; the inner edge forms an air inlet and surrounds a first height of the protrusion in the air outlet direction; the inner edge surrounds a top edge of the protrusion to form an inner air outlet; the outer edge surrounds a second height of the protrusion in the air outlet direction; the outer edge surrounds a top edge of the protrusion to form an outer air outlet; the second height is greater than the first height; the inner edge surrounds the top edge of the protrusion higher than the highest point of the impeller blade of the axial flow fan, and / or the inner edge is circular, the outer edge of the impeller blade of the axial flow fan is matched with the inner wall of the protrusion around the inner edge, and the gap formed by the outer edge of the impeller blade and the inner wall is less than a preset interval value.

[0011] In some embodiments, the preset interval value is 0-10mm.

[0012] In some embodiments, the outer edge of the protrusion is provided with a water baffle around the top edge, and the water baffle is arranged in close contact with the edge of the air outlet of the top plate; the inner edge of the water baffle is protruded inwardly in the axial direction of the flow guide ring, and / or the outer edge of the water baffle is protruded outwardly in the radial direction of the flow guide ring.

[0013] In some embodiments, one-third to two-thirds of the impeller blades of the axial flow fan are outside the flow guide ring.

[0014] In some embodiments, the mounting structure comprises: a support, the support comprises a support rod, a bottom frame and a receiving portion; the support rod comprises a bottom end and a top end; the bottom frame is connected with the bottom end; the receiving portion is connected with the top end and is provided with a space matched with the sunken arrangement of the impeller blade, wherein the external air enters the space through at least two support rods; a connecting fixing member, the connecting fixing member is connected with the receiving portion, the flow guide ring and the axial flow fan.

[0015] In some embodiments, the receiving portion comprises two receiving sub-portions; the space matched with the sunken arrangement of the impeller blade is arranged between the two receiving sub-portions arranged oppositely and separated from each other.

[0016] In some embodiments, the shell comprises a condensation heat dissipation negative pressure area and an electrical control component area, the condensation heat dissipation negative pressure area is provided with a wind guide device and a heat exchanger, and the electrical control component area is provided with an electrical control box; the condensation heat dissipation negative pressure area is surrounded by a side plate with an air inlet, a top plate with an air outlet, a bottom plate and an internal partition plate, the internal partition plate is used to separate the condensation heat dissipation negative pressure area and the electrical control component area to form a partitioned arrangement, the internal partition plate is provided with a wind passing structure, and the electrical control box is provided with a heat dissipation fin parallel to the wind direction of the wind passing structure.

[0017] Compared with the prior art, the beneficial effects of the embodiments of the present application are:

[0018] The utility model provides a technical scheme provided by the utility model discloses a top-mounted air conditioner, which comprises a shell, the shell comprises a side plate air inlet and a top plate air outlet, a wind guide device is arranged in the shell, wherein the wind guide device comprises a flow guide ring, an axial flow fan, the upper fan blade of the axial flow fan is arranged in the flow guide ring, the lower fan blade of the axial flow fan is arranged outside the flow guide ring, a mounting structure, the receiving part of the mounting structure is provided with a space matched with the sunken axial flow fan, and the mounting structure is connected with the flow guide ring and the axial flow fan, wherein air enters from the side plate air inlet, sequentially passes through the space and the flow guide ring, and is discharged from the top plate air outlet. BRIEF DESCRIPTION OF DRAWINGS

[0019] The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this application, illustrate embodiments of the utility model and serve to explain the utility model, and do not constitute improper limitations on the utility model. In the drawings:

[0020] Figure 1 It is a three-dimensional schematic view of the wind guide device provided by the utility model embodiment.

[0021] Figure 2 It is a schematic view of the relative position relation of the flow guide ring and the axial flow fan provided by the utility model embodiment.

[0022] Figure 3 It is a schematic view of the relative position relation of the heat exchanger and the wind guide device provided by the utility model embodiment.

[0023] Figure 4 It is a top view schematic view of the wind guide device arranged in the shell provided by the utility model embodiment.

[0024] Figure 5 It is a three-dimensional schematic view of the flow guide ring provided by the utility model embodiment.

[0025] Figure 6 It is a top view schematic view of the flow guide ring provided by the utility model embodiment.

[0026] Figure 7 It is the A-A direction section view of the top view schematic view of the flow guide ring provided by the utility model embodiment.

[0027] Figure 8It is the partial enlarged view of the A-A direction section view provided by the utility model embodiment.

[0028] Figure 9 It is the cooperation schematic view of the outer edge and the inner edge of the fan blade around the convex inner wall provided by the utility model embodiment.

[0029] Figure 10 It is another cooperation schematic view of the outer edge and the inner edge of the fan blade around the convex inner wall provided by the utility model embodiment.

[0030] Figure 11 It is the assembly schematic view of the water baffle ring and the shell top plate provided by the utility model embodiment.

[0031] Figure 12 It is the three-dimensional schematic view of the mounting structure provided by the utility model embodiment.

[0032] Figure 13 It is the setting schematic view of the air passing structure provided by the utility model embodiment.

[0033] Figure 14 It is the setting schematic view of the heat dissipation fin provided by the utility model embodiment.

[0034] Mark explanation:

[0035] Flow guide ring-10, the outer edge surface of the flow guide ring-11, air inlet-12, inner air outlet-13, outer air outlet-14, connecting part-15, inner edge-151, outer edge-152, fixing bolt hole-16, water inlet-17, water baffle ring-18, the inner edge of the water baffle ring-181, the outer edge of the water baffle ring-182, the inner edge around the convex inner wall-19.

[0036] Axial flow fan-20, fan blade outer edge-21.

[0037] Mounting structure-30, bottom frame-31, support rod-32, receiving part-33, first receiving sub-portion-331, second receiving sub-portion-332.

[0038] Heat exchanger-40, the inner edge surface of the heat exchanger-41, curved heat exchange part-42.

[0039] The edge of the top plate air outlet-50, filling material-51.

[0040] Air passing structure-60, heat dissipation fin-61, B-side plate air inlet, C-air outlet direction. Specific implementation

[0041] Example implementations will now be described more fully with reference to the accompanying drawings. Example implementations may, however, be implemented in many different forms and should not be construed as limited to the implementations set forth herein; rather, these implementations are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example implementations to those skilled in the art. Like reference numerals refer to like elements throughout the various figures, so that detailed descriptions of the figures are omitted for clarity.

[0042] In order to reduce the floor area, the internal structure of the submerged liquid-cooled energy storage system is designed to be compact. Therefore, the height of the equipment is relatively high, and the submerged liquid-cooled chiller generally adopts a top-mounted layout. In order to reduce the height of the unit and reduce the instability or safety hazards caused by the high center of gravity, measures need to be taken to reduce the height of the unit.

[0043] However, the submerged liquid-cooled chiller generally uses an axial flow fan designed in a convex form, which limits the height reduction of the chiller.

[0044] In view of the above problems, the embodiments of the present application provide the following solutions:

[0045] Figure 1 is a perspective view of a wind guide device provided by the embodiments of the present application. Referring to Figure 1 , and combining Figures 2 to 14 , the top-mounted air conditioner in the present embodiment will be described in detail. The top-mounted air conditioner comprises: a shell, the shell comprising a side plate air inlet B and a top plate air outlet; a wind guide device, the wind guide device being arranged in the shell; wherein the wind guide device comprises: a flow guide ring 10; an axial flow fan 20, the upper fan blades of the axial flow fan 20 being arranged in the flow guide ring 10, and the lower fan blades of the axial flow fan 20 being arranged outside the flow guide ring 10; a mounting structure 30, the receiving part of the mounting structure 30 being provided with a space matched with the sunken arrangement of the axial flow fan 20, and the mounting structure 30 being connected with the flow guide ring 10 and the axial flow fan 20; wherein air enters from the side plate air inlet B, passes through the space and the flow guide ring 10 in turn, and is discharged from the top plate air outlet.

[0046] In the present embodiment, the flow guide ring 10 is a structure for guiding the direction of air flow. The flow guide ring 10 can be cylindrical or inverted ladder-shaped, which is not limited here. The axial flow fan 20 can represent the fan body, or the fan body and the fan mesh cover, which is not limited here. The fan body can include a shell, an impeller, a motor, etc. The mounting structure 30 can be a support mounting structure with a certain height, or a combination of a support mounting structure and a hoisting mounting structure, which is not limited here.

[0047] It can be understood that the mounting structure 30 is fixedly connected with the shell.

[0048] Exemplarily, the mounting structure 30 can be a bracket, the bracket is fixedly connected with the flow guide ring 10, the flow guide ring 10 is fixedly connected with the fan cover, and the fan cover is fixedly connected with the fan body, so that the fan body is suspended and the lower fan blade is arranged outside the flow guide ring 10. Possibly, the suspended arrangement can be replaced by a hoisting mounting structure.

[0049] Exemplarily, the mounting structure 30 can be a bracket, the bracket is fixedly connected with the flow guide ring 10, the flow guide ring 10 is fixedly connected with the fan cover, and the fan cover is fixedly connected with the fan body, so that the fan body is suspended and the lower fan blade is arranged outside the flow guide ring 10. Possibly, the suspended arrangement can be replaced by a hoisting mounting structure.

[0050] It is worth noting that the external air enters through the side plate air inlet, passes through the support space, the axial flow fan and the flow guide ring in turn, and is finally discharged from the top plate air outlet. Compared with the arrangement that the fan is completely placed in the flow guide ring and part of the fan blade is exposed outside the flow guide ring, the fan can be in more sufficient contact with the air, so that the efficiency of the fan is improved, and the gravity center of the fan is lowered, so that the structure of the top-mounted air conditioner is more compact.

[0051] In some embodiments, the top-mounted air conditioner further comprises: a heat exchanger 40, the heat exchanger 40 comprising a wind-passing heat exchange structure, the heat exchanger 40 being vertically arranged between the side plate air inlet B and the air guide device and arranged along the length direction of the side plate air inlet B; wherein the top of the axial flow fan 20 is lower than the upper end surface of the heat exchanger 40, and / or the bottom of the axial flow fan 20 is higher than the lower end surface of the heat exchanger 40.

[0052] In this embodiment, according to the shape and structure of the heat exchange surface of the heat exchanger, the heat exchanger can be a tubular heat exchanger or a plate heat exchanger, which is not limited here. According to the purpose of the heat exchanger, the heat exchanger can be a cooler or a condenser, which is not limited here. It should be noted that the cooler is used to cool the fluid to the required temperature, and the condenser is used to condense saturated steam to release latent heat and condense into liquid.

[0053] Exemplarily, the heat exchanger 40 can be composed of a plurality of tubular flow channels arranged in a certain pattern, and the fluid exchanges heat through these flow channels and the flow channel wind-passing heat exchange gaps.

[0054] It is worth noting that the vertical arrangement of the heat exchanger along the length direction of the side plate air inlet can make the structure of the top-mounted air conditioner more compact.

[0055] In some embodiments, the heat exchanger 40 is a micro-channel condenser, and the wind-passing heat exchange structure is a gap between the condensing channels.

[0056] In this embodiment, the micro-channel condenser can include a plurality of condensing flow channels, and the condensing flow channels arranged in parallel and adjacent to each other form condensing gaps, and the condensing gaps are the wind-passing heat exchange structures.

[0057] In some embodiments, the inner edge surface 41 of the heat exchanger is close to the outer edge surface 11 of the flow guide ring, or the inner edge surface 41 of the heat exchanger is in close contact with the outer edge surface 11 of the flow guide ring; the outer edge surface 11 is in the shape of a cylindrical surface.

[0058] It is worth noting that the above design can reduce the shielding area of the flow guide ring on the heat exchanger.

[0059] In some embodiments, the heat exchanger 40 is two pieces, and the two pieces of heat exchanger 40 surround the air guide device in an L shape; or the heat exchanger 40 is two pieces, and the two pieces of heat exchanger 40 surround the air guide device in an L shape and are connected by the curved heat exchange part 42.

[0060] In this embodiment, the shell includes two adjacent and perpendicular side plates, and corresponding air inlets are formed on the two side plates, respectively. The two air inlets are adjacent to each other, and the heat exchanger 40 is arranged along the two air inlets, forming an L-shaped structure.

[0061] In some embodiments, the flow guide ring 10 includes a connecting part 15, and the connecting part 15 includes a closed inner edge 151 and a closed outer edge 152; the inner edge 151 forms the air inlet 12 and surrounds a first height in the protruding direction C; the inner edge surrounds the protruding top edge to form the inner air outlet 13; the outer edge 152 surrounds a second height in the protruding direction C; the outer edge surrounds the protruding top edge to form the outer air outlet 14; the second height is greater than the first height; the inner edge surrounding the protruding top edge is higher than the highest point of the blade of the axial flow fan 20, and / or the inner edge 151 is circular, the outer edge 21 of the blade of the axial flow fan 20 is matched with the inner wall 19 surrounding the protruding inner edge, and the gap formed by the outer edge 21 of the blade and the inner wall 19 is less than a preset interval value.

[0062] It should be noted that the outer edge 21 of the blade is matched with the inner wall 19, which means that the outer edge 21 of the blade has an arc that matches the inner wall 19. Due to the different blade processes, the outer edge 21 of the blade can be arranged only on the main part of the outer edge of the blade, or can be arranged around the entire outer edge of the blade, which is not limited here.

[0063] It is worth noting that the blade is sleeved on the inner edge surrounding the protrusion and rotates around the fan axis. The airflow generated by the axial flow blade enters the flow guide cover through the air inlet, and after the cover guides the airflow, the airflow flows out of the flow guide cover through the inner air outlet and the outer air outlet in turn. The guided diffusion air duct can reduce the wind resistance and reduce the wind noise, so that the fan can dissipate heat more efficiently.

[0064] The fan will be adjusted in frequency according to the operating conditions during operation. Vibration will be generated during the frequency conversion process. Usually, the fan is arranged on a support structure, and the support structure is connected with the fairing, so the vibration will be transmitted to the fairing. In other cases, the fan is directly connected with the fairing, causing the vibration to be directly transmitted to the fairing. Alternatively, the vibration of the fan is first transmitted to the unit shell, and then transmitted to the fairing. The above examples are only used to explain different cases that may cause the fairing to vibrate. The present embodiment disperses the load acting on the structure to the inner wall and the outer wall, reduces local stress concentration, and avoids vibration displacement deformation of the fairing.

[0065] The inner wall forms a small gap with the fan blade, and the height of the inner wall is higher than the highest point of the fan blade. When the fan is running, negative pressure is easily formed.

[0066] In some embodiments, the preset interval value is 0-10 mm.

[0067] Preferably, the preset interval value is 4-6 mm.

[0068] In some embodiments, a water retaining ring 18 is arranged around the convex top edge, and the water retaining ring 18 is arranged in close contact with the edge 50 of the top plate air outlet; the inner edge 181 of the water retaining ring is convex inwardly in the axial direction around the fairing 10, and / or the outer edge 182 of the water retaining ring is convex outwardly in the radial direction around the fairing 10.

[0069] In the present embodiment, the upper plane of the water retaining ring 18 is in close contact with the air outlet outer edge of the unit top cover plate, and a filling material 51 such as a sponge is clamped therebetween.

[0070] It is worth noting that when the fan is running in the rain, part of the rainwater will be blown to the outer edge around the convex after falling, and will flow upward against the flow. In this case, the rainwater may flow into the electrical control area inside the unit along the gap between the outer edge around the convex and the top cover. The water retaining ring effectively avoids the possibility of rainwater entering the unit interior along these gaps when flowing upward against the flow.

[0071] As an optional implementation, the connecting part 15 is a plate-shaped ring, and the surface of the ring is provided with a water falling hole 17 for water discharge.

[0072] In some embodiments, one-third to two-thirds of the axial flow fan 20 blades are outside the fairing 10.

[0073] Preferably, one-half of the axial flow fan 20 blades are outside the fairing 10.

[0074] In some embodiments, the mounting structure comprises: a bracket comprising a support rod 32, a bottom frame 31 and a receiving portion 33; the support rod 32 comprises a bottom end and a top end; the bottom frame 31 is connected to the bottom end; the receiving portion 33 is connected to the top end and is provided with a space matching the sunken setting of the fan blade, wherein the external air enters the space through at least two support rods 32; a connecting fixing member connected to the receiving portion 33, the flow guide ring 10 and the axial flow fan 20.

[0075] In this embodiment, the receiving portion 33 is a thin plate structure made by an integrated forging forming process. The connecting fixing member is a bolt and a nut, and the specific connection and installation method is as described in the above embodiment, which will not be repeated here.

[0076] It should be noted that the design of the sunken fan blade means that the lowest point of the fan blade can be lower than the lowest edge of the receiving hole.

[0077] Optionally, half of the axial flow fan 20 blades are outside the receiving hole.

[0078] In some embodiments, the receiving portion 33 comprises two receiving sub-portions (a first receiving sub-portion 331 and a second receiving sub-portion 332); the space matching the sunken setting of the fan blade is provided between the two oppositely arranged and mutually separated receiving sub-portions.

[0079] In this embodiment, the plate structure is partitioned to form two receiving sub-portions. The two partitioned ends are arranged close to the side plate air inlet B.

[0080] In some embodiments, the shell comprises a condensation heat dissipation negative pressure area and an electrical control component area, the condensation heat dissipation negative pressure area is provided with a wind guide device and a heat exchanger 40, and the electrical control component area is provided with an electrical control box; the condensation heat dissipation negative pressure area is surrounded by a side plate with an air inlet, a top plate with an air outlet, a bottom plate and an internal partition plate, the internal partition plate is used to separate the condensation heat dissipation negative pressure area and the electrical control component area to form a partitioned arrangement, the internal partition plate is provided with a wind passing structure 60, and the electrical control box is provided with a heat dissipation fin 61 parallel to the wind direction.

[0081] In this embodiment, the wind passing structure 60 is arranged at the middle and lower part of the internal partition plate.

[0082] In the embodiments of the present application, the terms "first", "second", "third" are only used for the purpose of description, and cannot be understood as indicating or implying relative importance; the term "a plurality of" refers to two or more than two, unless otherwise explicitly limited. The terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense, for example, "connecting" can be fixedly connected, or can be detachably connected, or integrally connected; "connecting" can be directly connected, or indirectly connected through an intermediate medium. For ordinary skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0083] In the description of the embodiments of the present application, it should be understood that the terms "upper", "lower", "left", "right", "front", "back" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or units referred to must have a particular direction, be constructed and operated in a particular orientation, therefore, cannot be understood as limiting the embodiments of the present application.

[0084] In the description of the present application, the terms "one embodiment", "some embodiments", "specific embodiments" and the like mean that the specific features, structures, materials or characteristics described in conjunction with the embodiments or examples are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0085] The above is only the preferred embodiment of the present application, and is not used to limit the embodiments of the present application. For those skilled in the art, the embodiments of the present application can have various modifications and changes. Any modification, equivalent replacement, improvement and the like made within the spirit and principles of the embodiments of the present application shall be included in the protection scope of the embodiments of the present application.

Claims

1. An overhead air conditioner characterized by comprising: The shell comprises a side plate air inlet and a top plate air outlet. The air guide device is arranged in the shell. The air guide device comprises a flow guide ring, an axial flow fan, and a mounting structure. The upper fan blade of the axial flow fan is arranged in the flow guide ring, and the lower fan blade of the axial flow fan is arranged outside the flow guide ring. The mounting structure is connected with the flow guide ring and the axial flow fan.

2. The ceiling air conditioner according to claim 1, characterized by Air enters the side plate air inlet, passes through the space and the flow guide ring in sequence, and is discharged from the top plate air outlet. The heat exchanger comprises a wind-passing heat exchange structure, and is vertically arranged between the side plate air inlet and the air guide device and arranged along the length direction of the side plate air inlet. The top of the axial flow fan is lower than the upper end surface of the heat exchanger, and / or the bottom of the axial flow fan is higher than the lower end surface of the heat exchanger.

3. The ceiling air conditioner according to claim 2, characterized by The heat exchanger is a micro-channel condenser, and the wind-passing heat exchange structure is the gap between the condensing channels.

4. The overhead air conditioner of claim 2, wherein The inner edge surface of the heat exchanger is close to the outer edge surface of the flow guide ring, or the inner edge surface of the heat exchanger is in close contact with the outer edge surface of the flow guide ring. The outer edge surface is in the shape of a cylindrical curved surface.

5. The overhead air conditioner of claim 2, wherein The heat exchanger comprises two blocks, and the two blocks surround the air guide device in an L shape.

6. The overhead air conditioner of claim 1, wherein The heat exchanger comprises two blocks, and the two blocks surround the air guide device in an L shape and are connected through a curved heat exchange part. The flow guide ring comprises a connecting part, and the connecting part comprises a closed inner edge and a closed outer edge. The inner edge forms an air inlet and surrounds a first height in the air outlet direction.

7. The overhead air conditioner of claim 6, wherein The outer edge surrounds a second height in the air outlet direction.

8. The overhead air conditioner of claim 6, wherein, The inner edge surrounds the top edge of the protrusion and is higher than the highest point of the fan blade of the axial flow fan. The inner edge is circular, the outer edge of the fan blade of the axial flow fan is matched with the inner wall of the protrusion surrounded by the inner edge, and the gap formed by the outer edge of the fan blade and the inner wall is less than a preset interval value.

9. The overhead air conditioner of claim 1, wherein The preset interval value is 0-10 mm.

10. The overhead air conditioner of claim 1, wherein The outer edge of the protrusion top edge is provided with a water baffle, and the water baffle is arranged in close contact with the edge of the top plate air outlet. The inner edge of the water baffle is inwardly protruded in the axial direction of the flow guide ring, and / or the outer edge of the water baffle is outwardly protruded in the radial direction of the flow guide ring. One-third to two-thirds of the fan blades of the axial flow fan are outside the flow guide ring.

11. The overhead air conditioner of claim 10, wherein, The mounting structure comprises a support, a bottom frame, and a receiving part.

12. The overhead air conditioner of claim 1, wherein, The support comprises a bottom end and a top end. The bottom frame is connected with the bottom end. The receiving part is connected with the top end and is provided with a space matched with the sunken fan blades. The connecting fixing part is connected with the receiving part, the flow guide ring, and the axial flow fan. The receiving part comprises two receiving sub-parts. The space matched with the sunken fan blades is arranged between the two receiving sub-parts arranged opposite to each other and separated from each other. The shell comprises a condensation heat dissipation negative pressure area and an electrical control component area. The condensation heat dissipation negative pressure area is provided with the air guide device and the heat exchanger. The electrical control component area is provided with an electrical control box. The condensation heat dissipation negative pressure area is surrounded by a side plate with an air inlet, a top plate with an air outlet, a bottom plate and an internal partition plate, the internal partition plate is used to separate the condensation heat dissipation negative pressure area and the electric control component area to form a partitioned arrangement, the internal partition plate is provided with a wind passing structure, and the electric control box is provided with heat dissipation fins parallel to the wind direction of the wind passing structure.

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