Finger protection net assembly, air conditioner indoor unit and control method of air conditioner indoor unit

Abstract

The invention provides a finger protection net assembly, an air conditioner indoor unit and a control method thereof.The finger protection net assembly comprises a driving mechanism and a finger protection net structure used for providing protection for an air opening, and the air opening is provided with a first side and a second side which are opposite; the finger protection net structure is provided with more than two protection strips; the driving mechanism is used for driving all the protection strips to move, so that all the protection strips are sequentially arranged at intervals from the first side to the second side to form an unfolded state of the finger protection net structure; the driving mechanism is further used for driving the protection strips to move to the side of the air opening from the positions where the protection strips are in the unfolded state, so that the folded state of the finger protection net structure is formed. Compared with the scheme that in the prior art, when the finger protection net structure is in the folded state, the protection strips still block the middle of the air opening, the driving mechanism drives the protection strips to move to the side of the air opening when the finger protection net structure is in the folded state, and therefore blocking of the protection strips to air in the air opening can be reduced, and the air volume of the air opening is increased.

Description

Technical Field

[0001] The present invention belongs to the technical field of air conditioners, and particularly relates to a finger protection net assembly, an air conditioner indoor unit and a control method thereof. Background Art

[0002] When the air conditioner indoor unit is operating, the fan blade rotates at a high speed. At this time, if a finger extends into the air conditioner from the air outlet, it may touch the fan blade and cause injury. The finger protection net is such a part to prevent such injuries. It is installed between the air deflector and the left and right swing blades of the indoor unit. The main body of the protection net is generally made of steel wire material that is not easily deformed. The gap between the steel wires can just prevent the finger from going too deep and touching the fan blade, thus avoiding finger injury.

[0003] Although the hanging position of domestic household air conditioner indoor units is usually relatively high, and the probability of a finger accidentally reaching into the air conditioner is relatively low, and the finger protection net is not a standard part, the situation is different abroad. Considering factors such as the installation position of the air conditioner and the furniture layout, children often climb up, and the risk of a finger accidentally reaching into the air conditioner is relatively high. Especially in standards of regions such as North America and for Samsung customers, etc., there are not only mandatory requirements for the installation of finger protection net parts, but also many strength and rigidity tests on the finger protection net to ensure that the finger protection net does not deform under a certain force, further preventing personal injury.

[0004] From the installation position of the finger protection net, it will inevitably lead to a reduction in the air volume, thereby affecting the performance of the air conditioner and reducing the energy efficiency. The fine grille structure not only greatly reduces the air volume, but even causes problems such as noise and abnormal noise. Patent CN115950083A provides a finger protection net structure, which includes movable protection strips and fixed protection strips. The fixed protection strips are arranged in sequence at the air outlet. The finger protection net structure has a retracted state and an expanded state. In the expanded state, each movable protection strip moves one by one between two adjacent fixed protection strips to cooperate with the fixed protection strips to form a finger protection net to block fingers from entering the interior of the air conditioner air outlet. In the retracted state, each movable protection strip moves one by one to the rear side of the corresponding fixed protection strip, and at this time, a relatively large air volume can pass through. Among them, although in the retracted state, each movable protection strip is hidden behind the corresponding fixed protection strip and a relatively large air volume can pass through, the fixed protection strip and the movable protection strip still block the middle of the air outlet, resulting in a relatively large blockage of the air at the air outlet by the two. Therefore, improvements need to be made in this regard. Summary of the Invention

[0005] Therefore, the present invention provides a finger protection net structure, an air conditioner indoor unit and a control method thereof. The main technical problem to be solved is: how to reduce the blockage of the air in the air outlet by the finger protection net structure in the retracted state and improve the air volume at the air outlet.

[0006] To solve the above problems, the present invention provides a finger guard net assembly, which includes a driving mechanism and a finger guard net structure for protecting the air outlet. The air outlet has opposite first and second sides; the finger guard net structure has more than two protective strips;

[0007] Wherein, the driving mechanism is used to drive each of the protective strips to move, so that each of the protective strips is arranged at intervals in sequence from the first side to the second side to form an unfolded state of the finger guard net structure; and the driving mechanism is further used to drive each of the protective strips to move from the position where the unfolded state is located to the side of the air outlet to form a retracted state of the finger guard net structure.

[0008] In some embodiments, in the retracted state, each of the protective strips is distributed at the first side and / or the second side.

[0009] In some embodiments, each of the protective strips is divided into a first group of protective strips and a second group of protective strips; wherein, in the retracted state, the first group of protective strips is distributed at the first side, and the second group of protective strips is distributed at the second side.

[0010] In some embodiments, in the retracted state, at least a part of each of the protective strips is arranged in sequence along the flow direction of the air in the air outlet.

[0011] In some embodiments, the driving mechanism includes a motor, and the driving mechanism drives each of the protective strips to move through a single motor.

[0012] In some embodiments, the driving mechanism further includes transmission gears, and the number of the transmission gears is equal to the number of the protective strips and is connected to each of them in one-to-one correspondence;

[0013] Wherein, the motor is used to drive each of the transmission gears to rotate, so as to drive each of the protective strips to move by rotation through each of the transmission gears.

[0014] In some embodiments, the driving mechanism further includes a rotating shaft and a set of driving gears sleeved on the rotating shaft, and the set of driving gears meshes with each of the transmission gears; the motor drives the rotating shaft to rotate, so that the set of driving gears drives each of the transmission gears to rotate.

[0015] In some embodiments, among each of the protective strips, there is a first protective strip, and among each of the transmission gears, the transmission gear corresponding to the first protective strip is a first transmission gear, and the set of driving gears has a first driving gear, and the first driving gear meshes with the first transmission gear;

[0016] And / or, each of the protective strips includes a second protective strip and a fourth protective strip. Among the transmission gears, the transmission gear corresponding to the second protective strip is the second transmission gear, and the transmission gear corresponding to the fourth protective strip is the fourth transmission gear. The driving gear set includes a second driving gear, and the second driving gear meshes with the second transmission gear and the fourth transmission gear simultaneously.

[0017] In some embodiments, the driving mechanism further includes connecting rods. The number of the connecting rods is equal to the number of the protective strips and they are connected in a one-to-one correspondence; each of the protective strips is connected to each of the transmission gears through the corresponding connecting rod in a one-to-one correspondence;

[0018] Wherein, any one of the transmission gears is taken as the A transmission gear, the driving gear in the driving gear set that meshes with the A transmission gear is taken as the A driving gear, and the connecting rod in each of the connecting rods that is connected to the A transmission gear is taken as the A connecting rod. The tooth number ratio of the A driving gear to the A transmission gear is i; when the finger protection net structure switches from one state of the retracted state and the deployed state to the other state, the rotation angle of the A driving gear is a, and the rotation angle of the A connecting rod is b, and i = a / b.

[0019] In some embodiments, the finger protection net assembly further includes a guiding and limiting structure, and the guiding and limiting structure is used for guiding and limiting the movement of each of the protective strips;

[0020] Wherein, the guiding and limiting structure includes a track box. One end of each of the protective strips is connected to the driving mechanism, and the other end of each of the protective strips is movably clamped on the track box; a track structure is provided on the track box, and the track box guides and limits the movement of each of the protective strips through the track structure.

[0021] In some embodiments, the finger protection net assembly further includes a first support member and a second support member. A first guiding and limiting groove structure is provided on the first support member, and the first guiding and limiting groove structure is used for providing support to one end of each of the protective strips and guiding and limiting the movement of one end of each of the protective strips; a second guiding and limiting groove structure is provided on the second support member, and the second guiding and limiting groove structure is used for providing support to the other end of each of the protective strips and guiding and limiting the movement of the other end of each of the protective strips.

[0022] In some embodiments, the finger protection net assembly further includes a detection mechanism, and the detection mechanism is used for detecting the distance between a living object and the air outlet.

[0023] The present invention further provides an air conditioner indoor unit, which includes the finger protection net assembly described in any one of the above.

[0024] The present invention also provides a control method for the above-mentioned central air-conditioning indoor unit, which includes the following steps:

[0025] Judge whether the air-conditioning indoor unit is in the startup state. If so, detect whether there is a living thing within a range less than or equal to a preset distance a from the air outlet;

[0026] If so, control the finger guard net structure to switch to the unfolded state;

[0027] If not, control the finger guard net structure to switch to the folded state.

[0028] A finger guard net assembly, an air-conditioning indoor unit and a control method thereof provided by the present invention have the following beneficial effects:

[0029] 1. Compared with the prior art in which the protection strips still block the middle of the air outlet when the finger guard net structure is in the folded state, in the folded state of the finger guard net structure of the present invention, the driving mechanism drives each protection strip to move to the side of the air outlet, so as to reduce the blockage of the air in the air outlet by the protection strips and improve the air volume of the air outlet.

[0030] 2. After the air-conditioning indoor unit is turned on daily, the infrared recognition system is synchronously turned on. When no finger is detected approaching the air outlet of the air conditioner, each protection strip of the finger guard net assembly is folded and hidden on the side of the air outlet of the air conditioner, which is basically the same as the air outlet direction, reducing the impact on the air volume output and ensuring the air-conditioning performance; when a finger is detected approaching, each protection strip of the finger guard net assembly unfolds and turns out to the air outlet of the air conditioner to block the finger from reaching deep into the air outlet and accidentally touching the fan blade to ensure safety. In this way, the contradiction between the safety and the air volume of the air-conditioning indoor unit is solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. The drawings in the following description are only exemplary, and for those of ordinary skill in the art, other implementation drawings can be obtained by extension based on the provided drawings without creative work.

[0032] Figure 1 is a schematic structural diagram of the air-conditioning indoor unit of the present invention;

[0033] Figure 2 is a schematic diagram showing the finger guard net structure of the present invention in the unfolded state;

[0034] Figure 3 is a schematic diagram showing the finger guard net structure of the present invention in the folded state;

[0035] Figure 4 is a partial exploded schematic diagram of the air-conditioning indoor unit of the present invention;

[0036] Figure 5 It is a schematic structural diagram of the driving gear set of the present invention;

[0037] Figure 6 It is a schematic diagram of the driving gear set of the present invention being drivingly connected to the first protective strip through the first driving gear;

[0038] Figure 7 It is a schematic diagram of the driving gear set of the present invention being drivingly connected to the second protective strip and the fourth protective strip through the second driving gear;

[0039] Figure 8 It is a schematic diagram of the driving gear set of the present invention being drivingly connected to the third protective strip and the fifth protective strip through the third driving gear;

[0040] Figure 9 It is a schematic diagram reflecting the rotation angles and rotation directions of the respective connecting rods;

[0041] Figure 10 It is a schematic diagram reflecting the retracted state of the respective protective strips;

[0042] Figure 11 It is a schematic diagram reflecting the deployed state of the respective protective strips;

[0043] Figure 12 It is a schematic diagram reflecting the sequential arrangement of the respective protective strips along the flow direction of the air in the air outlet in the retracted state;

[0044] Figure 13 It is a logic diagram of the control method of the air conditioner indoor unit of the present invention.

[0045] The reference numerals are as follows:

[0046] 1. Protective strip; 1a. First group of protective strips; 1b. Second group of protective strips; 2. Driving mechanism; 3. Bottom shell; 4. Cross-flow air impeller; 5. Sweeping air blades; 6. Track box; 7. Driving gear set; 10a. Panel; 10b. Air deflector; 10c. Panel body; 11. First protective strip; 12. Second protective strip; 13. Third protective strip; 14. Fourth protective strip; 15. Fifth protective strip; 16. Fixed protective strip; 21. Motor; 22. Driving box cover; 23. Limiting structure; 24. Worm; 31. First support; 32. Second support; 70. Rotating shaft; 71. First driving gear; 72. Second driving gear; 73. Third driving gear; 81. First transmission gear; 82. Second transmission gear; 83. Third transmission gear; 84. Fourth transmission gear; 85. Fifth transmission gear; 91. First connecting rod; 92. Second connecting rod; 93. Third connecting rod; 94. Fourth connecting rod; 95. Fifth connecting rod; 101. Air outlet; 101a. First side; 101b. Second side; 301. First guiding and limiting groove structure; 302. Second guiding and limiting groove structure. Detailed implementation mode

[0047] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and in no way constitutes a limitation to the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0048] In the description of the present invention, it should be understood that the orientation words such as "front, back, up, down, left, right", "horizontal, vertical, perpendicular, horizontal" and "top, bottom" and other orientation or positional relationships indicated usually refer to the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present invention and simplifying the description. Without contrary explanation, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the protection scope of the present invention; the orientation words "inside, outside" refer to the inside and outside relative to the contour of each component itself.

[0049] For ease of description, spatial relative terms such as "above", "over", "on the upper surface", "upper" etc. can be used here to describe the spatial positional relationship between a device or feature shown in a figure and other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations during use or operation in addition to the orientation described in the figure for the device. For example, if the device in the attached figure is inverted, the device described as "above or over other devices or structures" will then be positioned "below or under other devices or structures". Thus, the exemplary term "above" can include both the orientations of "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and corresponding interpretations should be made for the spatial relative descriptions used here.

[0050] In addition, it should be noted that the use of terms such as "first", "second" etc. to define components is only for the convenience of differentiating the corresponding components. Without additional statements, the above terms have no special meanings, and thus should not be construed as limiting the protection scope of the present invention.

[0051] Referring in combination to Figure 1-12 As shown, according to an embodiment of the present invention, a finger guard net assembly is provided, which includes a driving mechanism 2 and a finger guard net structure for providing protection to the air outlet 101. The air outlet 101 can be an air inlet or an air outlet. The air outlet 101 has opposite first side 101a and second side 101b. Both the first side 101a and the second side 101b can be the two sides in the length direction of the air outlet 101, or can be the two sides in the width direction of the air outlet 101.

[0052] Among them, the finger guard net structure has more than two protection bars 1. The driving mechanism 2 is used to drive each protection bar 1 to move, so that each protection bar 1 is arranged at intervals in turn from the first side 101a of the air outlet 101 to the second side 101b, to form an unfolded state of the finger guard net structure (as Figure 2 shown), at this time the finger guard net structure can provide protection to the air outlet 101. And the driving mechanism 2 is also used to drive each protection bar 1 to move from the position where the unfolded state is located to the side of the air outlet 101, to form a retracted state of the finger guard net structure (as Figure 3 shown), at this time the finger guard net structure no longer provides protection to the air outlet 101.

[0053] Compared with the prior art solution where the protection bar 1 still blocks in the middle of the air outlet 101 when the finger guard net structure is in the retracted state, in the present invention, when the finger guard net structure is in the retracted state, the driving mechanism 2 drives each protection bar 1 to move to the side of the air outlet 101, thereby reducing the blockage of the protection bar 1 to the air in the air outlet 101 and improving the air volume of the air outlet 101.

[0054] In some embodiments, the foregoing protective strips 1 may be made of steel wires, rigid rubber bands or other materials with satisfactory rigidity.

[0055] In some embodiments, in the retracted state, the protective strips 1 are distributed at the first side 101a and / or the second side 101b, which is conducive to the movement of the protective strips 1 to the positions where they are arranged at intervals in sequence from the first side 101a to the second side 101b of the air outlet 101 in the deployed state.

[0056] In some embodiments, as Figure 3 shown, the foregoing protective strips 1 are divided into a first group of protective strips 1a and a second group of protective strips 1b. Among them, in the retracted state, the first group of protective strips 1a are distributed at the first side 101a, and the second group of protective strips 1b are distributed at the second side 101b.

[0057] Compared with the solution of arranging all the protective strips 1 on one side of the air outlet 101 in the retracted state, in the present invention, the protective strips 1 are divided into two groups, and the two groups of protective strips 1 are respectively distributed at the first side 101a and the second side 101b, so that the moving distance of the protective strips 1 towards the middle of the air outlet 101 in the deployed state can be reduced, which is conducive to controlling the movement of the protective strips 1.

[0058] In some embodiments, as Figure 12 shown, in the retracted state, at least a part of the protective strips 1 are arranged in sequence along the flow direction of the air in the air outlet 101, so that the protective strips 1 on the downstream side can be hidden behind the protective strips 1 on the upstream side, thereby reducing the blockage of the air in the air outlet 101 by the protective strips 1 on the downstream side and being conducive to improving the air volume of the air outlet 101. When the air outlet 101 is an air outlet, the influence on the air volume output can be reduced, and the air-conditioning performance can be ensured.

[0059] In a specific application example, as Figure 12 shown, when the foregoing protective strips 1 are divided into a first group of protective strips 1a and a second group of protective strips 1b; and in the retracted state, the first group of protective strips 1a are located at the first side 101a and the second group of protective strips 1b are located at the second side 101b, in the retracted state, the protective strips 1 in the first group of protective strips 1a are arranged in sequence along the flow direction of the air in the air outlet 101, and the protective strips 1 in the second group of protective strips 1b are also arranged in sequence along the flow direction of the air in the air outlet 101, so that the blockage of the air in the air outlet 101 by the protective strips 1 on the downstream side in both the first group of protective strips 1a and the second group of protective strips 1b can be reduced, which is conducive to improving the air volume of the air outlet 101.

[0060] In a specific application example, as Figure 10-12As shown, the number of the foregoing protective strips 1 is five. Three of the five protective strips 1 form the first group of protective strips 1a described above, and the other two form the second group of protective strips 1b. The foregoing finger guard net assembly may further include a fixed protective strip 16. The five protective strips 1 cooperate with the fixed protective strip 16 to form a finger guard net in the unfolded state. In the retracted state, the first group of protective strips 1a moves towards the first side 101a of the air outlet 101, and the second group of protective strips 1b moves towards the second side 101b of the air outlet 101.

[0061] Among them, the number of the protective strips 1 can be increased or decreased according to the distance requirement of the protective strips 1. When the foregoing finger guard net assembly is applied to an air conditioner indoor unit, the grouping or moving mode of the protective strips 1 can be changed according to the internal space of the housing of the air conditioner indoor unit, such as the actual distance between the air deflector 10b and the air blade. For example, in the retracted state, the protective strips 1 move uniformly towards one side of the air outlet 101, such as the first side 101a or the second side 101b, to achieve unilateral storage or hiding.

[0062] In some embodiments, as Figure 4 shown, the foregoing driving mechanism 2 includes a motor 21. The driving mechanism 2 drives each protective strip 1 to move through the single motor 21, so that the number of motors 21 used can be reduced and the cost can be lowered.

[0063] To achieve the function that the foregoing driving mechanism 2 drives each protective strip 1 to move through the single motor 21, in some embodiments, the foregoing driving mechanism 2 may further include transmission gears. The number of the transmission gears is equal to the number of the protective strips 1 and they are connected in one-to-one correspondence. Among them, the motor 21 is used to drive each transmission gear to rotate, so as to drive each protective strip 1 to move in a rotational manner through each transmission gear.

[0064] In the above example, the single motor 21 drives each transmission gear to rotate, and then each transmission gear drives each protective strip 1 to move in a rotational manner, so that the function that the driving mechanism 2 drives each protective strip 1 to move through the single motor 21 can be achieved.

[0065] For the purpose of the foregoing motor 21 driving each transmission gear to rotate, in some embodiments, as Figure 4-8 shown, the foregoing driving mechanism 2 may further include a rotating shaft 70 and a driving gear set 7 sleeved on the rotating shaft 70. The driving gear set 7 meshes with each transmission gear. The motor 21 drives the rotating shaft 70 to rotate, so that the driving gear set 7 drives each transmission gear to rotate.

[0066] In the above example, the motor 21 drives the rotating shaft 70 to rotate, the rotating shaft 70 drives the driving gear set 7 to rotate, and the driving gear set 7 drives each transmission gear to rotate, thereby achieving the purpose of the motor 21 driving each transmission gear to rotate.

[0067] Among them, in one example, the aforementioned motor 21 can drive the rotating shaft 70 to rotate through a worm and worm gear transmission mechanism, and the reverse stroke of the worm and worm gear transmission mechanism has self-locking property. In another example, the aforementioned motor 21 can be a high-torque motor, and the output end of the motor 21 is directly connected to the rotating shaft 70, and the self-locking effect can also be achieved.

[0068] In a specific application example, such as Figure 6 shown, among the aforementioned protective strips 1, there is a first protective strip 11, and the transmission gear corresponding to the first protective strip 11 among the transmission gears is the first transmission gear 81. The driving gear set 7 has a first driving gear 71, and the first driving gear 71 meshes with the first transmission gear 81. In this example, the motor 21 drives the rotating shaft 70 to rotate, the rotating shaft 70 drives the first driving gear 71 to rotate, the first driving gear 71 drives the first transmission gear 81 to rotate, and the first transmission gear 81 drives the first protective strip 11 to rotate, so that the first protective strip 11 cooperates with other protective strips 1 to expand or retract.

[0069] Such as Figure 7 shown, among the aforementioned protective strips 1, there can also be a second protective strip 12 and a fourth protective strip 14. The transmission gear corresponding to the second protective strip 12 among the transmission gears is the second transmission gear 82, and the transmission gear corresponding to the fourth protective strip 14 is the fourth transmission gear 84. The driving gear set 7 has a second driving gear 72, and the second driving gear 72 meshes with the second transmission gear 82 and the fourth transmission gear 84 at the same time. The rotation directions of the second transmission gear 82 and the fourth transmission gear 84 are opposite to each other. In this example, the motor 21 drives the rotating shaft 70 to rotate, the rotating shaft 70 drives the second driving gear 72 to rotate, the second driving gear 72 drives the second transmission gear 82 and the fourth transmission gear 84 to rotate at the same time, the second transmission gear 82 drives the second protective strip 12 to rotate, and the fourth transmission gear 84 drives the fourth protective strip 14 to rotate, so that the second protective strip 12 and the fourth protective strip 14 cooperate with other protective strips 1 to expand or retract. Among them, since the second driving gear 72 can drive the movement of two protective strips 1 at the same time, it has the advantage of simplified structure.

[0070] Such as Figure 8As shown, each of the aforementioned protective strips 1 may further include a third protective strip 13 and a fifth protective strip 15. Among the transmission gears, the transmission gear corresponding to the third protective strip 13 is the third transmission gear 83, and the transmission gear corresponding to the fifth protective strip 15 is the fifth transmission gear 85. The driving gear set 7 has a third driving gear 73, and the third driving gear 73 meshes with both the third transmission gear 83 and the fifth transmission gear 85 simultaneously. The rotation directions of the third transmission gear 83 and the fifth transmission gear 85 are opposite to each other. In this example, the motor 21 drives the rotating shaft 70 to rotate, the rotating shaft 70 drives the third driving gear 73 to rotate, the third driving gear 73 drives the third transmission gear 83 and the fifth transmission gear 85 to rotate simultaneously, the third transmission gear 83 drives the third protective strip 13 to rotate, and the fifth transmission gear 85 drives the fifth protective strip 15 to rotate, so that the third protective strip 13 and the fifth protective strip 15 cooperate with other protective strips 1 to expand or retract. Among them, since the third driving gear 73 can drive two protective strips 1 to move simultaneously, it has the advantage of simplifying the structure.

[0071] In some embodiments, as Figure 6-9 shown, the aforementioned driving mechanism 2 may further include connecting rods. The number of connecting rods is equal to the number of protective strips 1 and they are connected in a one-to-one correspondence. Each protective strip 1 is connected to each transmission gear in a one-to-one correspondence through a corresponding connecting rod, such as a fixed connection. Among them, any transmission gear is taken as the A transmission gear, the driving gear in the driving gear set 7 that meshes with the A transmission gear is taken as the A driving gear, and the connecting rod connected to the A transmission gear among the connecting rods is taken as the A connecting rod. The tooth ratio of the A driving gear to the A transmission gear is i; when the finger guard structure switches from one of the retracted state and the expanded state to the other state, the rotation angle of the A driving gear is a, and the rotation angle of the A connecting rod is b, and i = a / b.

[0072] In the above example, when the rotation angle of the A connecting rod is designed, using the formula i = a / b is beneficial for quickly designing the number of teeth of the A driving gear and the A transmission gear.

[0073] In a specific application example, as Figure 6 shown, the aforementioned first protective strip 11 is fixedly connected to the first transmission gear 81 through the first connecting rod 91, and the first transmission gear 81 drives the first protective strip 11 to rotate through the first connecting rod 91.

[0074] As Figure 7As shown, the aforementioned second protective bar 12 is fixedly connected to the second transmission gear 82 through the second connecting rod 92, and the second transmission gear 82 drives the second protective bar 12 to rotate through the second connecting rod 92. The aforementioned fourth protective bar 14 is fixedly connected to the fourth transmission gear 84 through the fourth connecting rod 94, and the fourth transmission gear 84 drives the fourth protective bar 14 to rotate through the fourth connecting rod 94. Both the second transmission gear 82 and the fourth transmission gear 84 are driven by the second driving gear 72, and the rotation directions of the second transmission gear 82 and the fourth transmission gear 84 are opposite to each other.

[0075] As Figure 8 shown, the aforementioned third protective bar 13 is fixedly connected to the third transmission gear 83 through the third connecting rod 93, and the third transmission gear 83 drives the third protective bar 13 to rotate through the third connecting rod 93. The aforementioned fifth protective bar 15 is fixedly connected to the fifth transmission gear 85 through the fifth connecting rod 95, and the fifth transmission gear 85 drives the fifth protective bar 15 to rotate through the fifth connecting rod 95. Both the third transmission gear 83 and the fifth transmission gear 85 are driven by the third driving gear 73, and the rotation directions of the third transmission gear 83 and the fifth transmission gear 85 are opposite to each other.

[0076] The number of teeth of the aforementioned first driving gear 71 is Z1, the number of teeth of the second driving gear 72 is Z2, and the number of teeth of the third driving gear 73 is Z3. The number of teeth of the first driven gear is Z11; the number of teeth of the second driven gear is Z22, and the number of teeth of the fourth driven gear is Z24; the number of teeth of the third driven gear is Z33, and the number of teeth of the fifth driven gear is Z35. When the finger guard structure switches from one of the retracted state and the deployed state to the other state, the rotation angle of the first connecting rod 91 is b1, the rotation angle of the second connecting rod 92 is b2, the rotation angle of the third connecting rod 93 is b3, the rotation angle of the fourth connecting rod 94 is b4, and the rotation angle of the fifth connecting rod 95 is b5. The rotation angles of the first driving gear 71, the second driving gear 72, and the third driving gear 73 are the same, and are all a.

[0077] Among them, the tooth ratio of the first driving gear 71 to the first driven gear is i1, i1 = Z1 / Z11 = a / b1. The tooth ratio of the second driving gear 72 to the second driven gear is i2, i2 = Z2 / Z22 = a / b2. The tooth ratio of the third driving gear 73 to the third driven gear is i3, i3 = Z3 / Z33 = a / b3. The tooth ratio of the second driving gear 72 to the fourth driven gear is i4, i4 = Z2 / Z24 = a / b4. The tooth ratio of the third driving gear 73 to the fifth driven gear is i5, i5 = Z3 / Z35 = a / b5.

[0078] The active gears within the aforementioned active gear set 7 are arranged in sequence along the axial direction of the rotating shaft 70, and the active gears are arranged offset laterally from each other. The active gear set 7 drives each transmission gear to rotate through the respective active gears, and each transmission gear drives each protective strip 1 to rotate through the respective connecting rods, without interference with each other.

[0079] In some embodiments, the aforementioned finger guard net assembly may further include a guiding and limiting structure, which is used to guide and limit the movement of each protective strip 1 to improve the movement accuracy of each protective strip 1.

[0080] In order to achieve the functions of the above-mentioned guiding and limiting structure, in some embodiments, as Figure 4 shown, the above-mentioned guiding and limiting structure may include a track box 6. One end of each protective strip 1 is connected to the aforementioned driving mechanism 2, and the other end of each protective strip 1 is movably clamped on the track box 6. For example, the other end of each protective strip 1 can be movably clamped on the track box 6 through a limiting head to prevent the other end of each protective strip 1 from loosening from the track box 6. The track box 6 is provided with a track structure, and the track box 6 guides and limits the movement of each protective strip 1 through the track structure.

[0081] In some embodiments, as Figure 4 shown, the aforementioned finger guard net assembly may further include a first support member 31 and a second support member 32. The first support member 31 is provided with a first guiding and limiting groove structure 301, which is used to provide support for one end of each protective strip 1 and guide and limit the movement of one end of each protective strip 1. The second support member 32 is provided with a second guiding and limiting groove structure 302, which is used to provide support for the other end of each protective strip 1 and guide and limit the movement of the other end of each protective strip 1.

[0082] In the above example, the cooperation between the first guiding and limiting groove structure 301 on the first support member 31 and the second guiding and limiting groove structure 302 on the second support member 32 can provide support for each protective strip 1 and further guide and limit the movement of each protective strip 1 to further improve the movement accuracy of each protective strip 1.

[0083] In some embodiments, as Figure 4 shown, one end of each of the aforementioned protective strips 1 passes through the first support member 31 and is connected to the driving mechanism 2. The other end of each protective strip 1 passes through the second support member 32 and is connected to the track box 6.

[0084] It should be noted here that the foregoing transmission gears, the rotating shaft 70, and the driving gear set 7 form a gear set. The gear set is a coaxial multi-stage gear transmission, and the gear set can be installed in a box body to form a driving box. The motor 21 is installed on the driving box. Among them, the motor 21 can drive each driving gear in the gear set through a worm and worm gear mechanism, and the reverse stroke of the worm and worm gear mechanism has self-locking property. The output shaft of the motor 21 can be inserted and fixed to the worm 24 of the worm and worm gear mechanism. The rotating shaft 70 in the gear set is fixedly connected to the worm shaft of the worm and worm gear mechanism, so that the rotating shaft 70 rotates together under the drive of the worm shaft.

[0085] In the first example, as Figure 4 shown, the finger guard net assembly includes the foregoing driving mechanism 2 and the track box 6. One end of each protective strip 1 is connected to the driving mechanism 2, and the other end of each protective strip 1 is connected to the track box 6. In this way, a single-sided driving box drives each protective strip 1, and cooperates with a single track box 6 to maintain the smooth movement of each protective strip 1 in a fixed track. In the second example, according to the increase in the length of the air outlet 101, the finger guard net assembly does not include the foregoing track box 6, but the number of the foregoing driving mechanisms 2 is designed to be two. One end of each of the foregoing protective strips 1 is connected to one driving mechanism 2, and the other end of each protective strip 1 is connected to the other driving mechanism 2. The two driving mechanisms 2 cooperate to drive the movement of each protective strip 1 to meet the smooth movement of each protective strip 1. In the third example, the number of the foregoing finger guard net assemblies can be two, and they are arranged in sequence along the length direction of the air outlet 101. Each finger guard net assembly has a driving mechanism 2 and a track box 6. One end of each protective strip 1 in a single finger guard net assembly is connected to the driving mechanism 2, and the other end of each protective strip 1 in a single finger guard net assembly is connected to the track box 6. The track boxes 6 of the two finger guard net assemblies can be both arranged in the middle part of the air outlet 101, and the driving mechanisms 2 of the two finger guard net assemblies are distributed on both sides of the air outlet 101. Among them, the two finger guard net assemblies can be symmetrically arranged.

[0086] In some embodiments, the aforementioned air outlet 101 can be the air outlet of an air conditioner indoor unit. Each of the aforementioned connecting rods and the corresponding protective strip 1 can be integrally formed or fixedly connected. Each of the aforementioned protective strips 1 has opposite first and second ends, and each of the aforementioned protective strips 1 is connected to the corresponding connecting rod through the first end. In a specific application example, the first end of the protective strip 1 is the right end, and the second end of the protective strip 1 is the left end. For the second end of the protective strip 1, when assembling the protective strip 1 onto the bottom case 3 of the air conditioner indoor unit, insert the second end of the protective strip 1 into the starting position corresponding to the retraction in the track box 6 fixed on the left side of the bottom case 3. The second end of the protective strip 1 has a limit head structure to prevent the protective strip 1 from disengaging from the track box 6. Silicone grease can be applied to the first guiding and limiting groove structures 301 and 302 on the left and right sides of the bottom case 3 and the track structure in the track box 6 to limit the movement of the protective strip 1 and maintain stable operation.

[0087] For the first end of the protective strip 1, the connecting rod is provided with a connecting rod mounting hole, and the right side of the bottom case 3 also has a rotating shaft mounting hole for installing the aforementioned rotating shaft 70, which contains a bearing. Each of the aforementioned transmission gears, the rotating shaft 70, and the driving gear set 7 form a gear set, and this gear set can be installed in a box body to form a driving box. Among them, during installation, first align the gear set with the rotating shaft mounting hole and the connecting rod mounting hole. The rotating shaft 70 in the gear set is snapped into the rotating shaft mounting hole, and the transmission gear in the gear set is provided with a connecting portion. The transmission gear is snapped into the connecting rod mounting hole through the connecting portion to be fixedly connected to the corresponding connecting rod. After the gear set is installed, fixedly install the driving box cover 22 onto the first support member 31 from the outside to form a driving box. Then, align and insert the motor 21 outside the driving box cover 22 and fix the motor 21. Among them, the driving box cover 22 has a limiting structure 23 and bearings for limiting each driving gear and transmission gear, which can fix each driving gear and transmission gear in the gear set to rotate at a position and, together with the gear shaft, limit the axial and radial movement of each gear.

[0088] In some embodiments, the aforementioned finger guard net assembly further includes a detection mechanism for detecting the distance between a living object and the air outlet 101. Among them, the detection mechanism can be an infrared recognition system, and the detection mechanism can include an infrared sensor to detect the distance between a living object and the air outlet 101 through the infrared sensor. The infrared sensor can detect information such as temperature and distance and identify whether there is a living object such as a finger pattern approaching the air outlet 101. The finger guard net assembly can also include an alarm to issue an alarm when the detection mechanism detects an abnormality.

[0089] In some embodiments, the present invention further provides an air conditioner indoor unit, which may include the finger protection net assembly of any one of the above. Among them, due to the adoption of the above finger protection net assembly in the air conditioner indoor unit, compared with the prior art solution where the protection strip 1 still blocks the middle of the air outlet 101 in the retracted state of the finger protection net structure, in the present invention, when the finger protection net structure is in the retracted state, the driving mechanism 2 drives each protection strip 1 to move to the side of the air outlet 101, thereby reducing the blockage of the air in the air outlet 101 by the protection strip 1 and improving the air volume of the air outlet 101.

[0090] Among them, when the above finger protection net assembly is applied to the air conditioner indoor unit, the above air outlet 101 can be the air outlet of the air conditioner indoor unit, and the aforementioned infrared sensor and alarm can both be installed at the air outlet 101. After the air conditioner indoor unit is turned on daily, the above infrared recognition system formed by the detection mechanism is synchronously turned on.

[0091] The main body of the finger protection net assembly is each of the above protection strips 1 such as steel wires, etc. Each protection strip 1 passes through the opening structures on both sides of the bottom case 3, namely the aforementioned first guiding and limiting groove structure 301 and the second guiding and limiting groove structure 302, and is placed between the swing blade 5 and the air deflector 10b. The expansion and retraction movements of each protection strip 1 do not affect the normal rotation of the air deflector 10b and do not interfere with the movement of the swing blade 5. The aforementioned driving box is installed on one side of the air conditioner indoor unit, and the track box 6 is installed on the other side of the air conditioner indoor unit. In a specific application example, the driving box is installed on the right side of the air conditioner indoor unit, close to the main board and the positions of other driving motors 21 for convenient wiring. Correspondingly, the track box 6 is fixedly installed on the left side of the bottom case 3. Among them, the driving box includes a driving box cover 22, a worm and gear mechanism, a gear set, etc.

[0092] In some embodiments, the aforementioned air conditioner indoor unit further includes a housing, a swing blade 5, an evaporator component, a cross-flow fan 4, etc. Among them, the housing has an air deflector 10b, a front panel 10a, a panel body 10c, a bottom case 3, etc.

[0093] In some embodiments, the present invention further provides a control method for the above air conditioner indoor unit, which includes the following steps:

[0094] Judge whether the air conditioner indoor unit is in the on state. If so, detect whether there is a living thing within a range less than or equal to a preset distance a from the air outlet 101;

[0095] If so, control the finger protection net structure to switch to the expanded state;

[0096] If not, control the finger protection net structure to switch to the retracted state.

[0097] In the above example, a detection mechanism such as an infrared distance detection mechanism can be adopted. When it is detected that a finger approaches the air outlet 101, each protective strip 1 switches to the deployed state and is evenly distributed at the air outlet 101. The gaps between them effectively prevent the finger from reaching deep into the fan blades, avoiding scratching the fingers by the high-speed rotating fan blades. When it is not detected that a finger approaches the air outlet 101, each protective strip 1 switches to the retracted state, gathers and hides on the side of the air outlet 101, in the same direction as the air flow, reducing the blockage of the air and ensuring the air-conditioning performance. In this way, the contradiction between the safety and the air volume of the air-conditioning indoor unit is solved.

[0098] It should be noted here that after the air-conditioning indoor unit is turned on, each protective strip 1 is in the retracted state at this time. In addition, if it is detected that there is a living object within a range less than or equal to a preset distance a from the air outlet 101, the alarm is also controlled to sound an alarm. If it is detected that there is no living object within a range less than or equal to the preset distance a from the air outlet 101, the alarm is turned off.

[0099] The specific working process of the above air-conditioning indoor unit control method is as follows: The aforementioned air outlet 101 is the air outlet of the air conditioner. The infrared sensor can detect information such as temperature and distance, and identify whether there is a living object such as a finger approaching the air outlet of the air conditioner. A distance threshold a is set. When the distance x between the finger and the air outlet is less than or equal to this threshold a, the feedback control starts the motor 21. The motor 21 drives the worm and gear transmission mechanism, and the worm and gear transmission mechanism drives the aforementioned rotating shaft 70 to rotate. Since the aforementioned 3 driving gears (the first driving gear 71, the second driving gear 72, and the third driving gear 73) are all sleeved on the rotating shaft 70 to form a coaxial multi-stage gear transmission, the 3 driving gears rotate simultaneously. The first driving gear 71 drives the first driven gear 81 to rotate, so that the first connecting rod 91 and the first protective strip 11 rotate accordingly; the second driving gear 72 drives the second driven gear 82 and the fourth driven gear 84 to rotate, driving the second connecting rod 92 and the second protective strip 12, and the fourth connecting rod 94 and the fourth protective strip 14 to rotate to the target position; the third driving gear 73 drives the third driven gear 83 and the fifth driven gear 85 to rotate, respectively driving the third connecting rod 93 and the third protective strip 13, and the fifth connecting rod 95 and the fifth protective strip 15 to rotate to the target position. At this point, the 5 protective strips 1 are simultaneously deployed and rotated to the target position. Since the worm and gear transmission mechanism has self-locking in the reverse stroke, applying a certain force to the finger guard net assembly will not cause the worm 24 to reverse, effectively preventing the finger from continuing to penetrate, so as to avoid danger of touching the fan blades. At the same time, the alarm sounds to remind of the danger and to stay away from here.

[0100] When the infrared sensor detects that the finger is far away and the distance x from the air outlet of the air conditioner is greater than the threshold value a, control the motor 21 to reverse, and the above transmission structure runs reversely. The 5 protective strips 1 are simultaneously retracted to the starting positions on both sides of the air outlet of the air conditioner, changing to the retracted state, and the alarm is closed at the same time. Compared with the deployed state, at this time, the positions of the respective protective strips 1 are basically the same as the air outlet direction, and the blockage of the wind is significantly reduced.

[0101] It is easy for those skilled in the art to understand that, on the premise of no conflict, the advantageous technical features of the above various methods can be freely combined and superimposed.

[0102] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention. The above is only the preferred implementation manner of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A finger guard net assembly, characterized in that: It includes a driving mechanism (2) and a finger guard net structure for providing protection to the air outlet (101). The air outlet (101) has opposite first side (101a) and second side (101b); the finger guard net structure has more than two protection bars (1). Wherein, the driving mechanism (2) is used to drive each of the protection bars (1) to move, so that each of the protection bars (1) is arranged at intervals in turn from the first side (101a) to the second side (101b) to form an unfolded state of the finger guard net structure; and the driving mechanism (2) is also used to drive each of the protection bars (1) to move from the position where the unfolded state is located to the side of the air outlet (101) to form a folded state of the finger guard net structure.

2. The finger guard net assembly according to claim 1, characterized in that: In the folded state, each of the protection bars (1) is distributed at the first side (101a) and / or the second side (101b).

3. The finger guard net assembly according to claim 2, characterized in that: Each of the protection bars (1) is divided into a first group of protection bars (1a) and a second group of protection bars (1b); wherein, in the folded state, the first group of protection bars (1a) is distributed at the first side (101a), and the second group of protection bars (1b) is distributed at the second side (101b).

4. The finger guard net assembly according to any one of claims 1-3, characterized in that: In the folded state, at least a part of each of the protection bars (1) is arranged in turn along the flow direction of the air in the air outlet (101).

5. The finger guard net assembly according to any one of claims 1-3, characterized in that: The driving mechanism (2) includes a motor (21), and the driving mechanism (2) drives each of the protection bars (1) to move through a single motor (21).

6. The finger guard net assembly according to claim 5, characterized in that: The driving mechanism (2) further includes transmission gears, and the number of the transmission gears is equal to the number of the protection bars (1) and is connected in one-to-one correspondence; Wherein, the motor (21) is used to drive each of the transmission gears to rotate, so as to drive each of the protection bars (1) to move in a rotational manner through each of the transmission gears.

7. The finger guard net assembly according to claim 6, wherein: The driving mechanism (2) further includes a rotating shaft (70) and a driving gear set (7) sleeved on the rotating shaft (70), and the driving gear set (7) meshes with each of the transmission gears; the motor (21) drives the rotating shaft (70) to rotate, so that the driving gear set (7) drives each of the transmission gears to rotate.

8. The finger guard net assembly according to claim 7, characterized in that: Each of the protection bars (1) has a first protection bar (11), the transmission gear corresponding to the first protection bar (11) among each of the transmission gears is a first transmission gear (81), the driving gear set (7) has a first driving gear (71), and the first driving gear (71) meshes with the first transmission gear (81). And / or, each of the protective strips (1) has a second protective strip (12) and a fourth protective strip (14). Among the transmission gears, the transmission gear corresponding to the second protective strip (12) is a second transmission gear (82), and the transmission gear corresponding to the fourth protective strip (14) is a fourth transmission gear (84). The driving gear set (7) has a second driving gear (72), and the second driving gear (72) meshes with both the second transmission gear (82) and the fourth transmission gear (84) simultaneously.

9. The finger guard net assembly according to claim 7 or 8, characterized in that: The driving mechanism (2) further includes connecting rods. The number of the connecting rods is equal to the number of the protective strips (1) and they are connected in one-to-one correspondence; each of the protective strips (1) is connected to each of the transmission gears in one-to-one correspondence through the corresponding connecting rod; Wherein, any one of the transmission gears is taken as an A transmission gear, the driving gear in the driving gear set (7) that meshes with the A transmission gear is taken as an A driving gear, and the connecting rod among the connecting rods that is connected to the A transmission gear is taken as an A connecting rod. The tooth number ratio of the A driving gear to the A transmission gear is i; when the finger guard structure switches from one state of the retracted state and the deployed state to the other state, the rotation angle of the A driving gear is a, and the rotation angle of the A connecting rod is b, and i = a / b.

10. The finger guard net assembly according to any one of claims 1-3, 6-8, characterized in that: It further includes a guiding and limiting structure, and the guiding and limiting structure is used for guiding and limiting the movement of each of the protective strips (1); Wherein, the guiding and limiting structure includes a track box (6). One end of each of the protective strips (1) is connected to the driving mechanism (2), and the other end of each of the protective strips (1) is movably clamped on the track box (6); a track structure is provided on the track box (6), and the track box (6) guides and limits the movement of each of the protective strips (1) through the track structure.

11. The finger guard net assembly according to claim 10, wherein: It further includes a first support member (31) and a second support member (32). A first guiding and limiting groove structure (301) is provided on the first support member (31), and the first guiding and limiting groove structure (301) is used for providing support to one end of each of the protective strips (1) and guiding and limiting the movement of one end of each of the protective strips (1); a second guiding and limiting groove structure (302) is provided on the second support member (32), and the second guiding and limiting groove structure (302) is used for providing support to the other end of each of the protective strips (1) and guiding and limiting the movement of the other end of each of the protective strips (1).

12. The finger guard net assembly according to any one of claims 1-3, 6-8, and 11, characterized in that: It further includes a detection mechanism, and the detection mechanism is used for detecting the distance between a living object and the air outlet (101).

13. An indoor air conditioner, characterized in that: It includes the finger guard assembly according to any one of claims 1-12.

14. A control method for an air conditioner indoor unit according to claim 13, characterized in that, It includes the following steps: Judge whether the air conditioner indoor unit is in the on state. If so, detect whether there is a living object within a range where the distance from the air outlet (101) is less than or equal to a preset distance a; If so, control the finger guard structure to switch to the deployed state; If not, control the finger guard structure to switch to the retracted state.

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