Air guide structure and ceiling machine

Abstract

The invention provides an air guide structure and a ceiling machine, the air guide structure comprises a first air guide assembly and a second air guide assembly which are adjacently arranged, the first air guide assembly comprises a first air guide door and a first motor, the second air guide assembly comprises a second air guide door, a transmission rod is arranged between the first motor and the second air guide door, and the transmission rod is connected with the first air guide door and the second air guide door. The first motor can drive the first air guide door and the second air guide door to rotate at the same time so as to close or open the air outlet. According to the air guide structure and the ceiling machine, the air direction and the air volume of the air outlet can be adjusted by arranging the first air guide door and the second air guide door which are linked, variability of the air blowing angle is achieved, the air loss is small, a wide air area can be formed easily, and meanwhile the user practicability is improved; automatic lifting of the air return grille can be realized through the lifting mechanism, so that the filter screen is more convenient to clean, high-altitude operation is avoided, and the safety is high.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning, and in particular to an air guide structure and a ceiling unit. Background Art

[0002] The ceiling air conditioner is an air conditioner that controls different rooms through air ducts or hot and cold water pipes and connects multiple terminals to achieve indoor air conditioning. It has the advantages of good heating / control effect and wide radiation area. It is currently favored by users in large spaces such as shopping malls, large venues, and office buildings.

[0003] Ceiling fans usually include air outlet panel, air guide door, corner cover, return air grille, filter screen and other structures. One end of the air guide door is fixed with motor, and the other end is fixed with enclosure. The motor drives the air guide door to rotate to control the air outlet direction and air supply angle. Figure 1-2 As shown; during the rotation, there are vertical air outlets that cannot be closed or guided, which will cause large wind loss due to air diversion, and the air cannot be centrally supplied. The air supply distance is short and the wind range is small, and rapid indoor temperature rise and fall cannot be achieved. In addition, there are air outlets in the vertical direction, and the wind is diverted directly downward, resulting in a poor user experience.

[0004] In addition, the filter is usually installed on the return air grille and the two ends are connected to the air outlet panel by hooks and snap-on structures. If you need to clean the filter, it is difficult to easily disassemble and clean it due to its high installation position. In addition, the return air grille is fixed on the air outlet panel. When working, the indoor air will be affected by the filter, resulting in a small return air volume and slow cooling and heating speed. If you want to quickly increase or decrease the temperature in a specific dust-free environment, you cannot achieve this by generally adjusting the return air volume.

[0005] In view of this, the present invention is proposed. Summary of the invention

[0006] The problem solved by the present invention is that the wind guide structure design of the existing ceiling machine is unreasonable, resulting in large wind loss, inability to centrally supply air, and small wind range. Another technical problem solved by the present invention is that the grille assembly structure of the existing ceiling machine is unreasonable, resulting in difficulty in cleaning operation and inability to meet the return air demand for rapid temperature rise and fall.

[0007] To solve the above problems, the present invention provides an air guide structure, comprising a first air guide component and a second air guide component that are adjacent to each other, the first air guide component comprising a first air guide door and a first motor, the second air guide component comprising a second air guide door, a transmission rod is arranged between the first motor and the second air guide door, and the first motor can simultaneously drive the first air guide door and the second air guide door to rotate to close or open the air outlet.

[0008] This setting can increase the air supply distance to quickly adjust the indoor temperature, and at the same time has a converging effect on the air volume. The wind direction adjustment range is wide and the application scenarios are more diversified. The movements of the first air guide component and the second air guide component can cooperate with each other, so that the air volume and air outlet direction of the air outlet are adjusted by the air guide structure, and the air volume can be controlled from 60%→95%, and the air supply effect is better.

[0009] Preferably, the first air guide assembly includes a first connecting rod, one end of which is connected to the first motor, the first motor is arranged at the air outlet, and the other end of the first connecting rod is connected to the first air guide door. This arrangement has a simple structure and a stable and reliable transmission, and the first air guide door and the second air guide door can be driven to rotate at the same time by the first motor.

[0010] Preferably, the first air guide assembly also includes a second connecting rod, one end of the second connecting rod is connected to the first connecting rod or the first motor, the other end of the second connecting rod is connected to the first air guide door, the first connecting rod is located on a side of the first air guide door close to the second air guide door, and the second connecting rod is located on a side of the first air guide door away from the second air guide door.

[0011] This arrangement can make the first air guide assembly form a stable triangular structure, and the movement is stable and reliable. Preferably, the second connecting rod is connected to the first motor. This arrangement can generate a rotational driving force for the first air guide door through the first connecting rod and the second connecting rod, and the force is more uniform and reliable.

[0012] Preferably, one end of the transmission rod is located on a side of the second air guide door close to the first air guide door, and the other end of the transmission rod is drivingly connected to the first motor. This arrangement enables the first motor to directly drive the first air guide door to rotate, and at the same time, the first motor forms a four-link structure through the rotating rod, the second air guide door, the third connecting rod and the air outlet panel, and can drive the second air guide door to rotate at the same time.

[0013] Preferably, the second air guide assembly includes a third connecting rod, one end of which is movably connected to the air outlet, and the other end of which is movably connected to the second air guide door. This arrangement allows the second air guide assembly to be driven to rotate by a transmission rod, and cooperate with the second air guide door to close or open the air outlet; the first air guide assembly and the second air guide assembly utilize the structural principle of a four-link, and only the first motor drives the first air guide door and the second air guide door to rotate simultaneously, thereby achieving diversification of air supply methods. Preferably, one end of the third connecting rod is rotatably connected to the air outlet panel, and the other end of the third connecting rod is rotatably connected to the second air guide door. This arrangement can make the movement of the first air guide assembly more flexible, avoid interference with the first air guide assembly during movement, and have a better effect on guiding the airflow or blocking the air outlet.

[0014] Preferably, the rotation angles of the first air guide door and the second air guide door are 30-50° and 20-60° respectively. This setting allows the first air guide door and the second air guide door to move simultaneously to close or open the air outlet, and can achieve the optimal air outlet effect in different operating modes.

[0015] The present invention further provides a ceiling machine, comprising an air outlet panel, wherein a return air port is arranged on the air outlet panel, an air outlet is arranged around the return air port, and the air guide structure as described above is arranged at the air outlet.

[0016] Preferably, the first motor is located at one side of the first air guide door and fixedly mounted on the air outlet panel, and the third connecting rod is located at the side end of the second air guide door and movably connected to the air outlet panel. This arrangement has a simple structure, stable and reliable transmission, and the first air guide component does not interfere with the movement of the second air guide component. Preferably, there are two third connecting rods, which are respectively located at the left and right ends of the second air guide door.

[0017] Preferably, the return air outlet is provided with a grille assembly, the grille assembly includes a return air grille and a lifting mechanism, the return air grille is provided with a filter, and the lifting mechanism is fixed to the air outlet panel to drive the return air grille to move up and down. This arrangement can provide high convenience and safety in installing, repairing, and cleaning the filter; the return air volume can be changed by adjusting the vertical height of the return air grille or the distance between the return air grille and the air outlet panel to achieve the purpose of quickly adjusting the indoor temperature.

[0018] Preferably, the lifting mechanism includes a roller, one end of the roller is connected to the second motor drive, and the other end of the roller is connected to the support frame. The second motor and the support frame are both arranged on the air outlet panel. The roller is provided with a wire fixing groove, and a lifting rope is provided between the wire fixing groove and the return air grille.

[0019] After receiving the signal, the second motor rotates in response and drives the roller to move to release or retract the lifting rope, and the lifting rope pulls the return air grille to move downward or upward; this arrangement has a simple structure and stable and reliable transmission. Preferably, there are two fixed wire grooves and they are arranged on the left and right sides of the roller. This arrangement can pull the return air grille from the left and right sides to prevent it from shaking and facilitate reset.

[0020] Preferably, the lifting mechanism further includes a locking assembly, which includes a gear and a locking wheel piece, wherein the gear is coaxially arranged with the roller, the locking wheel piece is obliquely arranged on the air outlet panel, and the locking wheel piece abuts against the gear.

[0021] When the second motor stops moving, the roller drives the gear to move in the opposite direction under the action of the return air grille's own gravity. The gear is subjected to counterclockwise rotation force. At this time, the lock wheel piece is reversely stuck in the convex tooth gap on the outer peripheral side of the gear to achieve a fixing effect. When the second motor stops running, the gear also stops immediately. At the same time, the free end of the locking piece is located between the teeth of the gear to achieve a fixed shape; and when the gear is driven by the second motor to rotate clockwise, the gear moves along the inclined direction of the lock wheel piece, and the movement is unobstructed.

[0022] Preferably, there are two lifting mechanisms, which are respectively located on both sides of the return air grille. This arrangement allows the return air grille to always be in a horizontal state during the up and down movement, making it convenient to reset after cleaning.

[0023] Compared with the prior art, the air guide structure and ceiling machine described in the present invention have the following beneficial effects: 1) By setting the linked first air guide door and the second air guide door, the wind direction and air volume of the air outlet can be adjusted to achieve the variability of the blowing angle, and the small wind loss is small, which is conducive to forming a wide wind range, and at the same time improves the practicality of users; 2) By setting a lifting mechanism, the return air grille can be automatically lifted and lowered, making the filter cleaning more convenient and avoiding high-altitude operations, with high safety; 3) At the same time, the return air area is adjustable to facilitate the cooperation of the blade structure to achieve rapid temperature adjustment of the indoor environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is an overall schematic diagram of a ceiling panel in the prior art;

[0025] Figure 2 It is a structural schematic diagram of a ceiling panel in the prior art in an air outlet state;

[0026] Figure 3 It is a schematic diagram of assembling the air guide structure according to an embodiment of the present invention;

[0027] Figure 4 Another perspective view of the air guide structure according to the embodiment of the present invention;

[0028] Figure 5 This is a schematic diagram of the air guiding structure in the cooling mode according to an embodiment of the present invention;

[0029] Figure 6 This is a schematic diagram of the air guiding structure in the heating mode according to an embodiment of the present invention;

[0030] Figure 7 This is a structural schematic diagram of the grille assembly and the air outlet panel in a separated state according to an embodiment of the present invention;

[0031] Figure 8 This is a schematic diagram of air outlet in which the grille assembly and the air outlet panel according to an embodiment of the present invention are in a separated state;

[0032] Fig. 9 It is a structural schematic diagram of the lifting mechanism according to an embodiment of the present invention;

[0033] Fig.10 It is a structural schematic diagram of the locking mechanism described in an embodiment of the present invention.

[0034] Description of reference numerals:

[0035] 1-air guide structure; 11-first air guide component; 111-first air guide door; 112-first motor; 113-first connecting rod; 114-second connecting rod; 115-transmission rod; 12-second air guide component; 121-second air guide door; 122-third connecting rod; 2-air outlet panel; 21-air outlet; 22-return air outlet; 3-grid component; 31-lifting mechanism; 311-roller; 312-second motor; 313-wire fixing groove; 314-support frame; 315-lifting rope; 316-locking component; 3161-gear; 3162-locking wheel; 32-return air grille; 33-filter. DETAILED DESCRIPTION

[0036] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and understandable, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. It should be noted that the technical features in each embodiment of the present invention can be combined with each other.

[0037] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0038] Unless otherwise clearly stipulated and limited, the first feature being "above" or "below" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. The first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is lower in level than the second feature. The up, down, left, right and other directional definitions in the present invention are the directions recognized when facing the front panel of the air conditioner after the air conditioner is normally installed.

[0039] The ceiling unit is a component of the embedded air conditioner, which is mainly embedded in the ceiling. Therefore, it occupies a small space, has a beautiful appearance, and is widely used. The air outlet direction and angle are adjusted by the air guide door. Since the single air guide door cannot be closed or guided in the vertical direction when rotating, there are problems such as large wind loss due to air outlet diversion and difficulty in centralized air supply, resulting in poor user experience. Therefore, the applicant proposes the following technical solution:

[0040] like Figure 3-4 As shown, an air guide structure 1 is provided on an air conditioner, and the air conditioner is provided with an air outlet 21. The air guide structure 1 includes a first air guide component 11 and a second air guide component 12 arranged adjacent to each other. The first air guide component 11 includes a first air guide door 111 and a first motor 112 that are drive-connected. The second air guide component 12 includes a second air guide door 121. A transmission rod 115 is provided between the first motor 112 and the second air guide door 121, which is used to drive the second air guide door 121 and the first air guide door 111 to rotate simultaneously to close or open the air outlet 21.

[0041] This setting can increase the air supply distance to quickly adjust the indoor temperature, and at the same time has a converging effect on the air volume, with a wide range of wind direction adjustment and more diversified application scenarios; the movements of the first air guide component 11 and the second air guide component 12 can cooperate with each other, so that the air volume and air direction of the air outlet 21 are adjusted by the air guide structure 1, and the air volume can be controlled from 60%→95%, and the air supply effect is better.

[0042] Preferably, the air conditioner includes an air outlet panel 2, an air outlet 21 is arranged on the periphery of the air outlet panel 2, the air guide structure 1 is arranged on the air outlet panel 2, the first air guide assembly 11 includes a first connecting rod 113, one end of the first connecting rod 113 is connected to the first motor 112, the first motor 112 is fixed to the air outlet 21, and the other end of the first connecting rod 113 is connected to the first air guide door 111. The structure of the arrangement is simple, and the first connecting rod 113 is used to drive the first air guide door 111 to rotate around the first motor 112.

[0043] Preferably, the first air guide assembly 11 includes a second connecting rod 114, one end of the second connecting rod 114 is connected to the first connecting rod 113 or the first motor 112, and the other end of the second connecting rod 114 is connected to the first air guide door 111, and the first connecting rod 113 and the second connecting rod 114 are respectively located on both sides of the first air guide door 111. This arrangement can form a stable triangular structure of the first air guide assembly 11, and the movement is stable and reliable. Preferably, the second connecting rod 114 is drivingly connected to the first motor 112. This arrangement can generate a rotational driving force for the first air guide door 111 through the first connecting rod 113 and the second connecting rod 114, and the force is more uniform and reliable.

[0044] Preferably, the second air guide assembly 12 includes a third connecting rod 122, one end of the third connecting rod 122 is connected to the air outlet panel 2, and the other end of the third connecting rod 122 is connected to the second air guide door 121. This arrangement allows the second air guide assembly 12 to be driven to rotate by the transmission rod 115, and cooperate with the second air guide door 121 to close or open the air outlet 21; the first air guide assembly 11 and the second air guide assembly 12 use the structural principle of a four-link, and only the first motor 112 drives the first air guide door 111 and the second air guide door 121 to rotate simultaneously, thereby realizing a variety of air supply modes.

[0045] Preferably, one end of the transmission rod 115 is located on the side of the second air guide door 121 close to the first air guide door 111, and the other end of the transmission rod 115 is connected to the first motor 112. This arrangement enables the first motor 112 to directly drive the first air guide door 111 to rotate, and at the same time, the first motor 112 forms a four-link structure through the transmission rod 115, the second air guide door 121, the third connecting rod 122 and the air outlet panel 2, which can drive the second air guide door 121 to rotate at the same time. Preferably, the rotation angles of the first air guide door 111 and the second air guide door 121 are 30-50° and 20-60° respectively. This arrangement enables the first air guide door 111 and the second air guide door 121 to move simultaneously to close or open the air outlet 21, and at the same time, the optimal air outlet effect can be achieved in different operating modes.

[0046] Specifically, in the cooling mode, driven by the first motor 112, the rotation angles a and b of the first air guide door 111 and the second air guide door 121 are 30° and 20° respectively. One side of the air outlet 21 guides the air from top to bottom along the first air guide door 111, and guides the air from left to right along the second air guide door 121. At this time, the loss of the guided air volume is small. At this time, the height h between the second air guide door 121 and the air outlet 21 is 50mm; according to the air volume Q=A*v, where v represents the flow velocity, m / s, and A represents the effective air outlet area, which is positively correlated with the air outlet height h. Under the same conditions, the conventional single air guide door cannot complete the horizontal air guidance, and the controllable horizontal distance h between the air outlet 21 and the air outlet panel 2 is only 35mm; the height h of the air guide structure 1 described in the present application is larger than that of the conventional structure, and the large effective air outlet area will increase the air volume, see Figure 5 .

[0047] Since the air can be supplied horizontally at this time, the cold air supplied to the room is generally located at the upper part of the indoor space. According to the principle that cold air descends and hot air rises, the cold air slowly sinks at this time, and the indoor hot air enters the ceiling unit through the return air outlet 22, which is conducive to quickly cooling the room. At the same time, it can avoid the cold air from blowing directly to the user. By smoothly discharging the air horizontally to the upper part of the room, the user feels less wind and has a better experience.

[0048] In the heating mode, the first motor 112 drives the first air guide door 111 and the second air guide door 121 to rotate at angles a and b of 50° and 60° respectively; the air outlet 21 is along the first air guide door 111 and the second air guide door 121 respectively, and the air outlet width w of the first air guide door 111 and the second air guide door 121 in the vertical direction is 45 mm; while the conventional air guide door structure cannot guide the air vertically, and the controllable air outlet width in the vertical direction is 30 mm; obviously, the air volume of the air guide structure 1 described in the present application is larger, see Figure 6 .

[0049] Since air can be supplied downward over a larger range at this time, the hot air delivered to the room can directly reach the ground of the indoor space. According to the principle that cold air descends and hot air rises, the hot air rises slowly at this time, and the cold air in the room enters the ceiling unit through the return air port 22, which is beneficial to the rapid warming of the room. In addition, at this time, the first air guide door 111 and the second air guide door 121 are parallel to each other and vertically downward. At this time, the air guiding direction is consistent with the air outlet 21. The farthest air guiding distance is 5m, while the conventional air guide door under the same working conditions is 3.5m, and the air supply effect is good.

[0050] As an example of the present invention, a return air port 22 is provided in the middle of the air outlet panel 2, an air outlet 21 is provided on the periphery of the return air port 22, a grille assembly 3 is provided on the return air port 22, and the grille assembly 3 includes a return air grille 32 and a lifting mechanism 31. The return air grille 32 is provided with a filter 33, and the lifting mechanism 31 is fixed on the air outlet panel 2 to drive the return air grille 32 to move up and down. Figure 7-8 shown.

[0051] This arrangement can provide high convenience and safety in installing, repairing and cleaning the filter 33; the return air volume can be changed by adjusting the vertical height of the return air grille 32 or the distance between the return air grille 32 and the air outlet panel 2 to achieve the purpose of quickly adjusting the indoor temperature.

[0052] like Figure 9-10 As shown, the lifting mechanism 31 includes a roller 311, one end of the roller 311 is drive-connected to the second motor 312, and the other end of the roller 311 is connected to the support frame 314. The second motor 312 and the support frame 314 are located on the air outlet panel 2, and the roller 311 is located at the return air outlet 22. The roller 311 is provided with a wire fixing groove 313, and a lifting rope 315 is provided between the wire fixing groove 313 and the return air grille 32.

[0053] After receiving the signal, the second motor 312 rotates in response and drives the roller 311 to move to release or retract the lifting rope 315, and the lifting rope 315 pulls the return air grille 32 to move downward or upward; this setting has a simple structure and stable and reliable transmission. Preferably, there are two fixed wire grooves 313 and they are arranged on the left and right sides of the roller 311. This setting can pull from the left and right sides of the return air grille 32 to prevent it from shaking and facilitate resetting. Preferably, there are two lifting mechanisms 31, which are respectively located on the front and back sides of the return air grille 32. This setting can keep the return air grille 32 in a horizontal state during the up and down movement, which is convenient for resetting after cleaning. Preferably, the lifting rope 315 is wound in the fixed wire groove 313.

[0054] Preferably, the lifting mechanism 31 also includes a locking assembly 316, and the locking assembly 316 includes a gear 3161 and a locking wheel piece 3162. The gear 3161 is coaxially arranged with the roller 311, and the locking wheel piece 3162 is obliquely arranged on the air outlet panel 2, and the locking wheel piece 3162 abuts against the gear 3161.

[0055] When the second motor 312 stops moving, the roller 311 drives the gear 3161 to move in the opposite direction under the action of the gravity of the return air grille 32. The gear 3161 is subjected to counterclockwise rotation force. At this time, the lock wheel piece 3162 is reversely stuck in the convex tooth gap on the outer peripheral side of the gear 3161 to achieve a fixing effect. When the second motor 312 stops running, the gear 3161 also stops immediately. At the same time, the free end of the lock wheel piece 3162 is located between the teeth of the gear 3161 to achieve a fixed state; and when the gear 3161 is driven by the second motor 312 to rotate clockwise, the gear 3161 moves along the inclined direction of the lock wheel piece 3162, and the movement is unobstructed.

[0056] Of course, for the reciprocating rotation of the second motor 312, the inclination angle of the lock wheel piece 3162 can be adjusted so that the second motor 312 can overcome the resistance of the lock wheel piece 3162 when rotating in the opposite direction to achieve the recovery of the lifting rope 315. Preferably, the lock wheel piece 3162, the support frame 314 and the air outlet panel 2 are integrally formed. This setting has a simple structure, is easy to produce and process, and has good mechanical strength.

[0057] Because the return air inlet 22 is the heat exchange channel for indoor air to enter the cavity, and the air enters the interior of the ceiling machine after passing through the filter 33 to purify the air; by controlling the rise and fall of the return air grille 32, the cleaning operation of the filter 33 is more convenient and efficient; when the filter 33 needs to be replaced or cleaned, the return air grille 32 can be lowered by remote control for maintenance and cleaning, avoiding high-altitude operations, and greatly improving maintenance efficiency and operational safety; in addition, the return air volume of the ceiling machine can be controlled by moving the return air grille 32 up and down. If rapid temperature adjustment is required, the height difference between the return air grille 32 and the air outlet panel 2 is adjusted according to the environmental parameters, so that the return air direction is changed from a single direction to a five-sided return air, and the total return air area S is S A *4+S B , thus achieving rapid heat exchange.

[0058] Although the present invention is disclosed as above, the present invention is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the scope defined by the claims.

Claims

1. A wind guide structure, characterized in that: The invention comprises a first air guide assembly (11) and a second air guide assembly (12) which are arranged adjacent to each other, wherein the first air guide assembly (11) comprises a first air guide door (111) and a first motor (112), and the second air guide assembly (12) comprises a second air guide door (121), a transmission rod (115) is arranged between the first motor (112) and the second air guide door (121), and the first motor can simultaneously drive the first air guide door (111) and the second air guide door (121) to rotate so as to close or open an air outlet (21).

2. The wind guide structure according to claim 1, characterized in that: The first air guide assembly (11) comprises a first connecting rod (113), one end of the first connecting rod (113) is connected to the first motor (112), the first motor (112) is arranged at the air outlet (21), and the other end of the first connecting rod (113) is connected to the first air guide door (111).

3. The wind guide structure according to claim 2, characterized in that: The first air guide assembly (11) further comprises a second connecting rod (114), one end of the second connecting rod (114) being connected to the first connecting rod (113) or the first motor (112), and the other end of the second connecting rod (114) being connected to the first air guide door (111), the first connecting rod (113) being located on a side of the first air guide door (111) close to the second air guide door (121), and the second connecting rod (114) being located on a side of the first air guide door (111) far from the second air guide door (121).

4. The wind guide structure according to claim 1, characterized in that: One end of the transmission rod (115) is located on a side of the second air guide door (121) close to the first air guide door (111), and the other end of the transmission rod (115) is drivingly connected to the first motor (112).

5. The wind guide structure according to claim 2, characterized in that: The second air guide assembly (12) comprises a third connecting rod (122), one end of the third connecting rod (122) is movably connected to the air outlet (21), and the other end of the third connecting rod (122) is movably connected to the second air guide door (121).

6. The wind guide structure according to claim 1, characterized in that: The rotation angles of the first air guide door (111) and the second air guide door (121) are 30-50° and 20-60° respectively.

7. A ceiling machine, characterized in that: It comprises an air outlet panel (2), the air outlet panel (2) is provided with a return air port (22), the air outlet (21) is provided around the return air port, and the air outlet (21) is provided with an air guide structure according to any one of claims 1 to 6.

8. The ceiling machine according to claim 7, characterized in that: The first motor (112) is located at one side of the first air guide door (111) and is fixedly mounted on the air outlet panel (2); the third connecting rod (122) is located at the side end of the second air guide door (121) and is movably connected to the air outlet panel (2).

9. The ceiling machine according to claim 7, characterized in that: The return air outlet (22) is provided with a grille assembly (3), the grille assembly (3) comprising a return air grille (32) and a lifting mechanism (31), the return air grille (32) is provided with a filter (33), the lifting mechanism (31) is fixed on the air outlet panel (2) and is used to drive the return air grille (32) to move up and down.

10. The ceiling machine according to claim 9, characterized in that: The lifting mechanism (31) comprises a roller (311), one end of the roller (311) is drivingly connected to a second motor (312), and the other end of the roller (311) is connected to a support frame (314), the second motor (312) and the support frame (314) are both arranged on the air outlet panel (2), the roller (311) is provided with a wire fixing groove (313), and a lifting rope (315) is arranged between the wire fixing groove (313) and the return air grille (32).

11. The ceiling machine according to claim 10, characterized in that: The lifting mechanism (31) further includes a locking assembly (316), wherein the locking assembly (316) comprises a gear (3161) and a locking wheel piece (3162), wherein the gear (3161) is coaxially arranged with the roller (311), and the locking wheel piece (3162) is obliquely arranged on the air outlet panel (2), and the locking wheel piece (3162) abuts against the gear (3161).

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