Ceiling unit

Abstract

The present invention provides a ceiling air conditioner, which includes a main body frame; an air outlet assembly; a first air deflector, the first air deflector is arranged on the swing mechanism, and the first air deflector is swingably arranged at the air outlet. The ceiling air conditioner provided by the present invention uses the first air deflector to guide the air outlet of the ceiling air conditioner, and makes the first air deflector tilt towards the installation plane of the main body frame by defining the angular relationship between the plane where the first air deflector is located and the installation plane of the main body frame, so as to ensure the air outlet effect of the ceiling air conditioner. At the same time, according to the relationship between the air outlet volume of the ceiling air conditioner and the angle c or the relationship between the height where the air outlet assembly is located and the angle c, the air outlet effect of the ceiling air conditioner can be further ensured according to the actual requirements of the ceiling air conditioner.

Description

Technical Field

[0001] The present invention relates to the technical field of air handling equipment, and particularly to a ceiling-mounted air conditioner. Background Art

[0002] A ceiling-mounted air conditioner is a type of air conditioner. It is installed embedded in the ceiling to reduce the occupied space, and heat exchange is carried out through the air outlet opened on the surface of the ceiling-mounted air conditioner. Due to the limitation of the position of its air outlet, it can only blow air in a set direction and cannot blow horizontally during refrigeration.

[0003] In the prior art, in order to enable the ceiling-mounted air conditioner to blow horizontally in the refrigeration mode so that the air flow adheres to the wall, the technical solution adopted is that the air outlet assembly is a liftable structure, and the main frame is fixedly arranged on the circumferential outer side of the air outlet assembly. When the ceiling-mounted air conditioner is working, the air outlet assembly descends a certain height and forms a height difference with the main frame. The air outlet assembly and the main frame arranged on the outer side of the air outlet assembly form an air outlet. The fan blows air from the inside of the ceiling-mounted air conditioner through the air outlet, and the air flow is guided by the air deflector at the air outlet. Especially when the air conditioner is in the refrigeration mode, it is necessary to make the air outlet as parallel to the horizontal plane as possible to increase the air supply distance, so as to achieve waterfall refrigeration and improve the comfort of users.

[0004] However, in the prior art, the air deflector of the ceiling-mounted air conditioner is designed to adjust the air outlet direction of the ceiling-mounted air conditioner only according to the angle of the air deflector, without considering the influence of the installation plane of the air deflector and the ceiling-mounted air conditioner on the air outlet direction of the ceiling-mounted air conditioner. And when the upward angle of the air deflector is too large, the air outlet air volume will be affected because the air blows directly against the wall. When the downward angle of the air deflector is too large, the air supply distance will be reduced, ultimately resulting in a poor air outlet effect of the ceiling-mounted air conditioner. Summary of the Invention

[0005] In order to solve the technical problem of the poor air outlet effect of the ceiling-mounted air conditioner in the prior art, a ceiling-mounted air conditioner is provided that defines the cooperation relationship between the air deflector and the installation plane of the ceiling-mounted air conditioner to improve the air outlet effect.

[0006] A ceiling-mounted air conditioner includes:

[0007] A main frame;

[0008] An air outlet assembly, the air outlet assembly is arranged on the main frame. When the ceiling-mounted air conditioner is in the refrigeration mode, the air outlet assembly forms a height difference with the main frame, and an air outlet is formed between the air outlet assembly and the main frame;

[0009] A first air deflector, the first air deflector is arranged on a swing mechanism, and the first air deflector is swingably arranged at the air outlet;

[0010] The angle c between the plane of the first air deflector and the installation plane of the main body frame ranges from -10° ≤ c ≤ 10°, and when the angle c is 0°, the plane of the first air deflector is parallel to the installation plane;

[0011] The air outlet assembly has a first descending height h. When the ceiling unit is in the cooling mode, the range of the first descending height h is 20mm ≤ h ≤ 36mm.

[0012] When the range of the angle c is -10° ≤ c < 0°, the plane of the first air deflector is inclined upward relative to the installation plane, and the range of the first descending height h is 20mm ≤ h ≤ 28mm; or, when the range of the angle c is 0° ≤ c < 10°, the range of the first descending height h is 20mm ≤ h ≤ 36mm.

[0013] The air outlet assembly is liftably arranged on the main body frame, and the air outlet assembly has a working position where it descends to a set height to form the height difference.

[0014] The installation plane of the main body frame is parallel to the horizontal plane.

[0015] An extension plate is arranged on the first air deflector. When the air outlet assembly is in the working position, the extension plate extends out of the first air deflector.

[0016] The ceiling unit further includes a wind guiding structure. The wind guiding structure is arranged on the main body frame, and when the ceiling unit is in the cooling mode, the wind guiding structure can guide the air flowing out of the air outlet.

[0017] The main body frame includes a frame. At least part of the air flowing out of the air outlet passes through the frame. The wind guiding structure includes a second air deflector, and the second air deflector is swingably arranged on the frame; or, the main body frame includes a frame. At least part of the air flowing out of the air outlet passes through the frame, and a diversion channel is formed on the frame, and the diversion channel constitutes the wind guiding structure.

[0018] On the other hand, the present invention provides a ceiling unit, including:

[0019] A main body frame;

[0020] An air outlet assembly, the air outlet assembly is arranged on the main body frame. When the ceiling unit is in the cooling mode, the air outlet assembly forms a height difference with the main body frame, and an air outlet is formed between the air outlet assembly and the main body frame;

[0021] A first air deflector, the first air deflector is arranged on a swinging mechanism, and the first air deflector is swingably arranged at the air outlet;

[0022] The plane where the first air deflector is located is inclined upward relative to the installation plane of the main body frame, and the range of the angle c between the plane where the first air deflector is located and the installation plane is -10° ≤ c ≤ 0°.

[0023] The air outlet assembly is disposed on the main body frame in a liftable manner, and the air outlet assembly has a working position where it descends to a set height to form the height difference.

[0024] The air outlet assembly has a first descending height h. When the ceiling machine is in the cooling mode, the range of the first descending height h is 20 mm ≤ h ≤ 28 mm.

[0025] The ceiling machine provided by the present invention uses the first air deflector to guide the air outlet of the ceiling machine, and by defining the angular relationship between the plane where the first air deflector is located and the installation plane of the main body frame, the first air deflector is inclined toward the installation plane of the main body frame, and the air outlet of the ceiling machine is directed toward the installation plane of the main body frame as much as possible, so as to ensure the air outlet effect of the ceiling machine. At the same time, according to the relationship between the air outlet air volume of the ceiling machine and the angle c or the relationship between the height where the air outlet assembly is located and the angle c, the air outlet effect of the ceiling machine can be further ensured according to the actual requirements of the ceiling machine. Description of the Drawings

[0026] Figure 1 It is a cross-sectional view of the ceiling machine according to the embodiment provided by the present invention;

[0027] Figure 2 It is a wind field simulation diagram when the angle c is -10° according to the embodiment provided by the present invention;

[0028] Figure 3 It is a wind field simulation diagram when the angle c is 0° according to the embodiment provided by the present invention;

[0029] Figure 4 It is a wind field simulation diagram when the angle c is 10° according to the embodiment provided by the present invention;

[0030] Figure 5 It is a wind field simulation diagram when the angle c is 15° according to the embodiment provided by the present invention;

[0031] Figure 6 It is a wind field simulation diagram when the angle c is -15° according to the embodiment provided by the present invention;

[0032] In the figure:

[0033] 1. Main body frame; 3. Air outlet assembly; 10. Air outlet; 4. First air deflector; 11. Frame; 6. Second air deflector; 7. Diversion channel; 5. Rotating arm. Detailed Embodiment

[0034] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0035] The wall effect (also known as the Coanda effect or the Coanda effect) refers to the tendency of a fluid (water flow or air flow) to leave its original flow direction and flow along the surface of a protruding object. When there is surface friction between the fluid and the surface of the object it flows through (it can also be said to be fluid viscosity, as long as the curvature is not large), the fluid will flow along the surface of the object. Moreover, when the ceiling unit is in cooling mode, the air guide plate at the air outlet is generally set horizontally to increase the air outlet distance of the ceiling unit. However, in fact, the air outlet of the ceiling unit will flow along the air guide plate away from the ceiling under the action of the wall effect, which ultimately causes the actual air outlet effect of the ceiling unit to deteriorate. However, in order to ensure the air supply distance of the ceiling unit in the prior art, it is generally simply selected to increase the relevant parameters of the fan (the diameter and speed of the fan) to ensure the air outlet volume, resulting in the need to increase the overall size of the ceiling unit or increase the cost. However, after the applicant studied the air flow of the ceiling machine and analyzed the simulation experimental data, it was found that the technical solution of increasing the relevant parameters of the fan actually has more disadvantages than advantages and is not conducive to the further development of the industry. The parameters of the inclination angle of the air guide plate, which have been neglected and ignored in this field, can effectively increase the air supply distance of the ceiling machine.

[0036] Therefore, the embodiments of the present application provide Figures 1 to 6 The ceiling machine shown includes: a main frame 1; an air outlet assembly 3, the air outlet assembly 3 is arranged on the main frame 1, when the ceiling machine is in cooling mode, the air outlet assembly 3 forms a height difference with the main frame 1, and an air outlet 10 is formed between the air outlet assembly 3 and the main frame 1; a first air guide plate 4, the first air guide plate 4 is arranged on the swing mechanism, and the first air guide plate is swingably arranged at the air outlet; the angle c between the plane where the first air guide plate 4 is located and the installation plane of the main frame 1 is in the range of -10°≤c≤10°, and when the angle c is 0°, the plane where the first air guide plate 4 is located is parallel to the installation plane; the air outlet assembly 3 has a first drop height h, when the ceiling machine is in cooling mode, the first drop height h is in the range of 20mm≤h≤36mm. That is, the first air guide plate 4 is tilted upward at a certain angle to ensure that the air outlet of the ceiling machine is attached to the ceiling as much as possible to flow, thereby ensuring the horizontal air supply distance of the ceiling machine in cooling mode, and achieving the waterfall cooling effect with maximum efficiency. Among them, the descending stroke of the air outlet component 3 is greater than 36 mm.

[0037] Taking the experimental data of a 3-horsepower unit as an example, simulation is carried out by adjusting the value of angle c. Here, when the plane of the first air deflector 4 is tilted upward relative to the installation plane of the main frame 1 (the first air deflector is upturned), it is a negative angle, and when the plane of the first air deflector 4 is tilted downward relative to the installation plane of the main frame 1 (the first air deflector swings downward), it is a positive angle. The simulation results are as follows:

[0038] Angle c <![CDATA[Air volume (m 3 / h)]]> Air supply distance -15°( Figure 6 ) 838 3.1m -10°( Figure 2 ) 995 3.7m 0°( Figure 3 ) 1005 3.5m 10°( Figure 4 ) 1112 2.2m 15°( Figure 5 ) 1112 1.4m

[0039] From the experimental results, when angle c is -10°, although the air volume does not reach the maximum value, the difference from the maximum air volume is not much, and its air supply distance reaches the maximum; when angle c decreases to -15°, both the air volume and the air supply distance start to decrease, and at this time, the air volume decays to the point where it cannot meet the air outlet requirements of the ceiling unit; when angle c increases to 0°, the decay of the air volume starts to decrease, but its air supply distance also starts to decrease; when angle c continues to increase to 10°, the air volume reaches the maximum value, but the air supply distance decays severely and is almost at the limit where it cannot meet the air supply distance requirements of the ceiling unit; when angle c continues to increase to 15°, the air volume reaches the maximum value, but the air supply distance has decayed from 3.7 m to 1.4 m, and at this time, the purpose of the horizontal air outlet of the ceiling unit cannot be achieved. That is, when the ceiling unit needs to supply air with a large air volume, using a larger angle c (for example, when angle c is from 0° to 10°) can ensure that the first air deflector guides all the air supply distances of the ceiling unit, and at the same time, it can ensure that the air supply volume is not affected by the first air deflector 4. When the ceiling unit needs to supply air with a small air volume, using a smaller angle c (for example, when angle c is from -10° to 0°), at this time, the first air deflector 4 is tilted upward as much as possible, so as to direct the air outlet of the ceiling unit to the ceiling to the greatest extent, making the air outlet of the ceiling unit flow as closely as possible along the ceiling, so as to ensure the effect of horizontal air outlet of the ceiling unit for waterfall cooling.

[0040] It should be noted that the main frame 1 is the main load-bearing structure of the ceiling unit. When the ceiling unit is installed, the main frame 1 is used to be installed on the ceiling, and other structures can be directly or indirectly installed on the main frame 1 and fixed on the ceiling through the main frame 1. The ceiling unit has an indoor unit part installed inside the ceiling. The main frame 1 is connected to the indoor unit, the air outlet assembly 3 is connected to the main frame 1, the indoor unit has an indoor unit air outlet, the first end of the air outlet duct of the main frame 1 is communicated with the indoor unit air outlet, and the air flow path is: return air inlet - evaporator - indoor unit air outlet - the first end of the air outlet duct - the second end of the air outlet duct - air outlet 10 blows out.

[0041] The ceiling unit further includes a blower, and the rotation speed of the blower is adjustable. The air volume of the air outlet of the ceiling unit is determined according to the rotation speed of the blower. When the rotation speed of the blower is high, it indicates that the air volume of the air outlet of the ceiling unit at this time is large; on the contrary, when the rotation speed of the blower is low, it indicates that the air volume of the air outlet of the ceiling unit at this time is small.

[0042] When the range of the angle c is -10° ≤ c < 0°, the plane where the first air deflector 4 is located is inclined upward relative to the installation plane, and the range of the first descending height h is 20 mm ≤ h ≤ 28 mm; or, when the range of the angle c is 0° ≤ c < 10°, the range of the first descending height h is 20 mm ≤ h ≤ 36 mm.

[0043] Taking the experimental data of a 3-horsepower unit as an example, simulation is carried out by adjusting the value of the first descending height h. Among them, taking the plane where the first air deflector 4 is located is inclined upward relative to the installation plane of the main body frame 1 (the first air deflector is upturned) as a negative angle, and taking the plane where the first air deflector 4 is located is inclined downward relative to the installation plane of the main body frame 1 (the first air deflector is swung down) as a positive angle, the simulation results are as follows:

[0044]

[0045] From the experimental results, taking the angle c as -10° as an example, when h reaches 28 mm, although the air volume does not reach the maximum value, the difference from the maximum air volume is not much, and its air supply distance reaches the maximum; when h increases to 36 mm, the air volume basically reaches the maximum value at this time, but the air supply distance decays severely and cannot meet the air outlet requirements of the ceiling unit; when h decreases to 20 mm, both the air volume and the air supply distance begin to decrease, making the ceiling unit unable to reach the optimal efficiency; taking the angle c as 10° as an example, when h reaches 28 mm, both the air volume and the air supply distance reach the maximum value; when h increases to 36 mm, the air volume still remains the maximum value, but the air supply distance decays severely from 3.5 m to 1.4 m and can no longer meet the air outlet requirements of the ceiling unit; when h decreases to 20 mm, although the air supply distance is relatively large, its air volume decays severely, and the air outlet effect of the ceiling unit is still not as good as that when h reaches 28 mm. That is to say, when the air outlet assembly 3 descends to 20 mm to 28 mm, the air outlet effect of the ceiling unit can be guaranteed.

[0046] The air outlet assembly 3 is disposed on the main body frame 1 in a liftable manner, and the air outlet assembly 3 has a working position where it descends to a set height to form the height difference. After the ceiling unit starts to work, the air outlet assembly 3 descends downward relative to the main body frame 1, and when it reaches the set height, an air outlet 10 is formed, so as to ensure that the ceiling unit can carry out normal heat exchange work.

[0047] The installation plane of the main body frame 1 is parallel to the horizontal plane. That is to say, the main body frame 1 is installed on a horizontal plane such as a ceiling.

[0048] A lengthened plate is provided on the first air deflector 4. When the air outlet assembly is in the working position, the lengthened plate extends out of the first air deflector 4. In order to further increase the air guiding effect of the first air deflector 4 on the air outlet of the ceiling machine, the lengthened plate is used to increase the effective air guiding size of the first air deflector 4, thereby increasing the air guiding effect of the first air deflector 4.

[0049] The ceiling machine further includes an air guiding structure which is arranged on the main body frame 1 and can guide the air outlet of the air outlet when the ceiling machine is in the refrigeration mode. By using the air guiding structure arranged on the main body frame 1, the air outlet of the ceiling machine can be further made to flow along the ceiling, thereby increasing the air supply distance of the ceiling machine in the refrigeration mode to enhance the effect of waterfall refrigeration.

[0050] As an implementation manner, the main body frame 1 includes a frame 11, at least part of the air outlet air passes through the frame 11, and the air guiding structure includes a second air deflector 6 which is swingably arranged on the frame 11. By swinging the second air deflector 6, the flow direction of the air flow passing through the frame 11 (i.e., the upper part of the air flow) is adjusted, and together with the adjustment of the flow direction of the lower air flow by the first air deflector 4, the adjustment of the air outlet direction of the ceiling machine is realized, effectively improving the air outlet efficiency of the ceiling machine.

[0051] As another implementation manner, the main body frame 1 includes a frame 11, at least part of the air outlet air passes through the frame 11, and a diversion channel 7 is formed on the frame 11. The diversion channel 7 constitutes the air guiding structure. By directly machining the diversion channel 7 on the frame 11, the air flow passing through the frame 11 (i.e., the upper part of the air flow) is guided, the flow direction of this part of the air flow is limited, and it cooperates with the first air deflector 4 to overcome the wall attachment effect of the air flow.

[0052] The air outlet assembly includes an air outlet frame. An air outlet is formed between the air outlet frame and the main body frame, and the air outlet frame is lifted and lowered independently. In other embodiments not shown, the air outlet assembly 3 includes an air outlet frame and a return air panel. An air outlet is formed between the air outlet frame and the main body frame, the return air panel is provided with a return air port, and the air outlet frame is connected to the return air panel and they are lifted and lowered together.

[0053] On the other hand, the present invention provides a ceiling-mounted air conditioner, comprising: a main body frame; an air outlet assembly disposed on the main body frame. When the ceiling-mounted air conditioner is in the cooling mode, a height difference is formed between the air outlet assembly and the main body frame, and an air outlet is formed between the air outlet assembly and the main body frame; a first air deflector disposed on a swing mechanism, the first air deflector being swingably disposed at the air outlet; a plane where the first air deflector is located is inclined upward with respect to an installation plane of the main body frame, and an angle c between the plane where the first air deflector is located and the installation plane ranges from -10° ≤ c ≤ 0°. That is, the first air deflector 4 is inclined upward by a certain angle to ensure as much as possible that the air blown out by the ceiling-mounted air conditioner adheres to the ceiling and flows, thereby ensuring the horizontal air supply distance of the ceiling-mounted air conditioner in the cooling mode and achieving the effect of waterfall cooling with the highest efficiency.

[0054] Taking the experimental data of a 3-horsepower unit as an example, simulation is carried out by adjusting the value of the angle c. Among them, taking the plane where the first air deflector 4 is located as inclined upward (the first air deflector tilts upward) with respect to the installation plane of the main body frame 1 as a negative angle, and the plane where the first air deflector 4 is located as inclined downward (the first air deflector swings downward) with respect to the installation plane of the main body frame 1 as a positive angle, the simulation results are as follows:

[0055] Angle c <![CDATA[Air volume (m 3 / h)]]> Air supply distance -15°( Figure 6 ) 838 3.1m -10°( Figure 2 ) 995 3.7m 0°( Figure 3 ) 1005 3.5m 10°( Figure 4 ) 1112 2.2m 15°( Figure 5 ) 1112 1.4m

[0056] From the experimental results, when the angle c is -10°, although the air volume does not reach the maximum value, the difference from the maximum air volume is not much, and its air supply distance reaches the maximum; when the angle c is reduced to -15°, both the air volume and the air supply distance start to decrease, and at this time the air volume decays to the point where it cannot meet the air outlet requirements of the ceiling-mounted air conditioner; when the angle c increases to 0°, the decay of the air volume starts to decrease, but its air supply distance also starts to decrease; when the angle c continues to increase to 10°, the air volume reaches the maximum value, but the air supply distance decays severely and is almost at the limit where it cannot meet the air supply distance requirements of the ceiling-mounted air conditioner; when the angle c continues to increase to 15°, the air volume reaches the maximum value, but the air supply distance has decayed from 3.7 m to 1.4 m, and at this time the purpose of horizontal air outlet of the ceiling-mounted air conditioner cannot be achieved. That is, when the air volume required for the air outlet of the ceiling-mounted air conditioner is small, a smaller angle c (for example, when the angle c is from -10° to 0°) is used. At this time, the first air deflector 4 is inclined upward as much as possible, so as to direct the air blown out by the ceiling-mounted air conditioner to the ceiling to the greatest extent, so that the air blown out by the ceiling-mounted air conditioner adheres to the ceiling and flows as much as possible, thereby ensuring the effect of horizontal air outlet of the ceiling-mounted air conditioner for waterfall cooling.

[0057] It should be noted that the main body frame 1 is the main load-bearing structure of the ceiling-mounted air conditioner. When the ceiling-mounted air conditioner is installed, the main body frame 1 is used to be installed on the ceiling, and other structures can be directly or indirectly installed on the main body frame 1 and fixed on the ceiling through the main body frame 1.

[0058] The air outlet assembly 3 is disposed on the main body frame 1 in a liftable manner, and the air outlet assembly 3 has a working position where it descends to a set height to form the height difference. After the ceiling unit starts to work, the air outlet assembly 3 descends downward relative to the main body frame 1, and when it reaches the set height, an air outlet 10 is formed, thereby ensuring that the ceiling unit can perform normal heat exchange work.

[0059] The air outlet assembly 3 has a first descending height h. When the ceiling unit is in the cooling mode, the range of the first descending height h is 20 mm ≤ h ≤ 28 mm. Among them, the descending stroke of the air outlet assembly 3 is greater than 28 mm. Preferably, the descending stroke of the air outlet assembly 3 is greater than 36 mm.

[0060] Taking the experimental data of a 3-horsepower unit as an example, the numerical value of the first descending height h is adjusted for simulation. Among them, taking the plane of the first air deflector 4 being inclined upward (the first air deflector tilts upward) relative to the installation plane of the main body frame 1 as a negative angle, and the plane of the first air deflector 4 being inclined downward (the first air deflector swings downward) relative to the installation plane of the main body frame 1 as a positive angle, the simulation results are as follows:

[0061]

[0062] Judging from the experimental results, taking the angle c as -10° as an example, when h reaches 28 mm, although the air volume does not reach the maximum value, the difference from the maximum air volume is not much, and its air supply distance reaches the maximum; when h increases to 36 mm, at this time the air volume basically reaches the maximum value, but the air supply distance decays severely and cannot meet the air outlet requirements of the ceiling unit; when h decreases to 20 mm, both the air volume and the air supply distance start to decrease, making the ceiling unit unable to reach the optimal efficiency; taking the angle c as 0° as an example, when h reaches 28 mm, the air volume and the air supply distance do not differ much from the maximum value; when h increases to 36 mm, the air volume reaches the maximum value, but the air supply distance decays severely from 3.5 m to 2 m and can no longer meet the air outlet requirements of the ceiling unit; when h decreases to 20 mm, although the air supply distance basically remains unchanged, its air volume decays severely, and the air outlet effect of the ceiling unit is still inferior to that when h reaches 28 mm. That is to say, when the angle c is in the range of -10° to 0°, when the air outlet assembly 3 descends to 20 mm to 28 mm, the air outlet effect of the ceiling unit can be guaranteed.

[0063] The above-described embodiments merely represent several implementation manners of the present invention. The description thereof is relatively specific and detailed, but it should not be construed as a limitation to the scope of the patent of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all fall within the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the appended claims.

Claims

1. A ceiling-mounted air conditioner, characterized in that: Comprising: Main body frame (1); Air outlet assembly (3), the air outlet assembly (3) is arranged on the main body frame (1). When the ceiling machine is in the cooling mode, the air outlet assembly (3) forms a height difference with the main body frame (1), and an air outlet (10) is formed between the air outlet assembly (3) and the main body frame (1); First air deflector (4), the first air deflector (4) is arranged on a swinging mechanism, and the first air deflector is swingably arranged at the air outlet; The angle c between the plane of the first air deflector (4) and the installation plane of the main body frame (1) ranges from -10° ≤ c < 0°. When the angle c is 0°, the plane of the first air deflector (4) is parallel to the installation plane. When the range of the angle c is -10° ≤ c < 0°, the plane of the first air deflector (4) is inclined upward relative to the installation plane; The air outlet assembly (3) has a first descending height h. When the ceiling machine is in the cooling mode, the range of the first descending height h is 20mm ≤ h ≤ 28mm.

2. The ceiling unit according to claim 1, wherein: The air outlet assembly (3) is liftably arranged on the main body frame (1), and the air outlet assembly (3) has a working position where it descends to a set height to form the height difference.

3. The ceiling unit according to claim 1 or 2, characterized in that: The installation plane of the main body frame (1) is parallel to the horizontal plane.

4. The ceiling unit according to claim 2, wherein: An extension plate is arranged on the first air deflector (4). When the air outlet assembly is in the working position, the extension plate extends out of the first air deflector (4).

5. The ceiling unit according to claim 1, characterized in that: The ceiling machine further includes a wind guiding structure, the wind guiding structure is arranged on the main body frame (1), and when the ceiling machine is in the cooling mode, the wind guiding structure can guide the air flowing out of the air outlet.

6. The ceiling unit according to claim 5, characterized in that: The main body frame (1) includes a frame (11), at least part of the air flowing out of the air outlet passes through the frame (11), the wind guiding structure includes a second air deflector, and the second air deflector is swingably arranged on the frame (11); or, the main body frame (1) includes a frame (11), at least part of the air flowing out of the air outlet passes through the frame (11), and a diversion flow channel is formed on the frame (11), and the diversion flow channel constitutes the wind guiding structure.

7. The ceiling unit according to claim 1, characterized in that: The air outlet assembly (3) includes an air outlet frame, an air outlet is formed between the air outlet frame and the main body frame, and the air outlet frame is lifted and lowered independently.

8. The ceiling unit according to claim 1, characterized in that: The air outlet assembly (3) includes an air outlet frame and a return air panel, an air outlet is formed between the air outlet frame and the main body frame, the return air panel is provided with a return air opening, and the air outlet frame is connected to the return air panel and they are lifted and lowered together.

9. A ceiling-mounted unit, characterized in that: Comprising: Main body frame (1); Air outlet assembly (3), the air outlet assembly (3) is arranged on the main body frame (1). When the ceiling machine is in the cooling mode, the air outlet assembly (3) forms a height difference with the main body frame (1), and an air outlet (10) is formed between the air outlet assembly (3) and the main body frame (1); First air deflector (4), the first air deflector (4) is arranged on a swinging mechanism, and the first air deflector is swingably arranged at the air outlet; The plane where the first air guide plate (4) is located is inclined upward relative to the installation plane of the main body frame (1), and the range of the angle c between the plane where the first air guide plate (4) is located and the installation plane is -10° ≤ c < 0°.

10. The ceiling unit according to claim 9, wherein: The air outlet assembly (3) is arranged on the main body frame (1) in a liftable manner, and the air outlet assembly (3) has a working position where it descends to a set height to form the height difference.

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