Indoor unit of air conditioner

Abstract

The invention discloses an air conditioner indoor unit which comprises a shell, an indoor heat exchanger, a fan assembly, a filter screen and at least one self-cleaning mechanism, the self-cleaning mechanism comprises a reel and a tensioning device, the reel is connected with one end of the filter screen, and the reel drives the filter screen to move between an unfolding position and a winding position. Therefore, through cooperation of the reel and the tensioning device, the filter screen can move between the unfolding position and the winding position, the tensioning device is arranged so that the filter screen can be kept in a tensioning state when the filter screen is located at the unfolding position and the winding position, the filter screen can be conveniently cleaned by the self-cleaning mechanism, the cleaning effect can be improved, and the cleaning efficiency can be improved. And the reel and the tensioning device are simple in structure, so that the structure of the self-cleaning mechanism can be more compact, the occupied space of the self-cleaning mechanism is reduced, the length of a filter screen required in the indoor unit of the air conditioner can be reduced, and the production cost can be reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioners, and more particularly to an indoor unit of an air conditioner. Background Art

[0002] In the prior art, there are three solutions for the self-cleaning mechanism in the indoor unit of an air conditioner: The first solution is that the self-cleaning mechanism is a double-roller structure. This solution has a complex structure, requires a relatively long filter screen, has a high production cost, and occupies a large volume in the indoor unit of the air conditioner. The second solution is that the filter screen in the self-cleaning mechanism is a sheet-shaped filter screen with a toothed frame. This solution requires a cavity for accommodating the curling of the filter screen, occupies a relatively large space, and results in a relatively large volume of the indoor unit of the air conditioner. The third solution is to use a fixed traditional filter screen and clean the debris on the filter screen by moving a brush. This solution has a low dust removal efficiency and a long cleaning time. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, an object of the present invention is to provide an indoor unit of an air conditioner to simplify the structure of the self-cleaning mechanism and improve the cleaning effect.

[0004] An indoor unit of an air conditioner according to an embodiment of the present invention includes: a housing, an indoor heat exchanger, and a fan assembly. An air inlet and an air outlet are formed on the housing. The indoor heat exchanger is disposed in the housing and is used for exchanging heat with indoor air entering from the air inlet. The fan assembly is disposed on a side of the indoor heat exchanger away from the air inlet and is used for causing indoor air to flow in from the air inlet, exchange heat with the indoor heat exchanger, and then be sent out from the air outlet. The indoor unit of the air conditioner further includes: a filter screen and at least one self-cleaning mechanism. The filter screen is disposed between the air inlet and the indoor heat exchanger. The filter screen has an unfolded position and a wound position and is used for filtering debris in indoor air. The self-cleaning mechanism is detachably connected to the housing. Wherein, the self-cleaning mechanism includes: a reel and a tensioning device. The reel is connected to one end of the filter screen. The reel drives the filter screen to be movable between the unfolded position and the wound position. When the filter screen is in the unfolded position, the filter screen is unfolded between the air inlet and the indoor heat exchanger. When the filter screen is in the wound position, the filter screen is adapted to be wound around the reel. The tensioning device is connected to the other end of the filter screen and is used for keeping the filter screen in a tensioned state when the filter screen moves between the unfolded position and the wound position.

[0005] The indoor unit of an air conditioner according to an embodiment of the present invention can make the filter move between the deployed position and the wound position through the cooperation of the reel and the tensioning device. The setting of the tensioning device can keep the filter in a tensioned state when it is in the deployed position and the wound position, which is convenient for the self-cleaning mechanism to clean the filter, is beneficial to improving the cleaning effect, and the structures of the reel and the tensioning device are simple, which can make the structure of the self-cleaning mechanism more compact, reduce the occupied space of the self-cleaning mechanism, and can also reduce the required length of the filter in the indoor unit of the air conditioner, which is beneficial to reducing the production cost.

[0006] In some embodiments, the self-cleaning mechanism further includes: a wire frame, the wire frame is arranged in the housing, one end of the reel is arranged adjacent to the wire frame, the tensioning device is arranged on the wire frame, and the filter can move along the wire frame between the deployed position and the wound position.

[0007] In some embodiments, the tensioning device is arranged adjacent to the reel. The tensioning device includes a tensioning device body and a connecting line. The tensioning device body is arranged on the wire frame. One end of the connecting line is connected to the tensioning device body in a telescopic manner, and the other end of the connecting line is connected to the other end of the filter. A plurality of guide shafts are arranged on the wire frame, and the plurality of guide shafts include a first guide shaft and a second guide shaft. The first guide shaft is arranged at one end of the wire frame far from the reel, and the second guide shaft is located between the first guide shaft and the reel. When the filter is in the wound position, the other end of the connecting line bypasses the first guide shaft and the second guide shaft and is connected to the other end of the filter.

[0008] In some embodiments, the cross-sectional shapes of both the first guide shaft and the second guide shaft are circular; and / or the cross-sectional area of the first guide shaft is smaller than the cross-sectional area of the second guide shaft.

[0009] In some embodiments, the tensioning device body includes: a telescopic bracket and a telescopic connector. The telescopic bracket is arranged on the wire frame, the telescopic connector is arranged in the telescopic bracket, one end of the connecting line is adapted to be wound on the telescopic connector, and the telescopic connector is configured to apply a pulling force on the filter in a direction opposite to the pulling force applied by the reel on the filter.

[0010] In some embodiments, a receiving groove is formed on the wire frame, and one side of the receiving groove facing the filter along the thickness direction of the wire frame is open, and the tensioning device is arranged in the receiving groove.

[0011] In some embodiments, it further includes: a clamping member, the clamping member is arranged at the other end of the filter, and the tensioning device is connected to the clamping member.

[0012] In some embodiments, the wire frame includes: a wire frame body, a first mounting plate, and a second mounting plate. The wire frame body is disposed between the air inlet and the indoor heat exchanger. An opening is formed in the wire frame body. When the filter screen is in the unfolded position, the filter screen faces the wire frame body. The first mounting plate and the second mounting plate are respectively connected to two sides of the wire frame body along the length direction of the housing. Guide grooves are formed on the surfaces of the first mounting plate and the second mounting plate facing each other. Two ends of the clamping member are respectively fitted in the guide grooves of the first mounting plate and the second mounting plate. When the filter screen moves between the unfolded position and the wound position, the clamping member is movable in the guide grooves.

[0013] In some embodiments, a plurality of partition rods are disposed in the opening. The plurality of partition rods are arranged at intervals along the movement direction of the filter screen. Each partition rod extends along the length direction of the housing. The plurality of partition rods divide the opening into a plurality of sub-openings. When the filter screen is in the unfolded position, the clamping member moves to one end of the wire frame away from the reel, and the filter screen completely covers all the sub-openings. When the filter screen is in the wound position, the filter screen is wound around the reel, and the filter screen and the clamping member avoid all the sub-openings.

[0014] In some embodiments, the wire frame body includes: a first wire frame section and a second wire frame section. The first wire frame section extends horizontally. The rear end of the second wire frame section is connected to the front end of the first wire frame section. The front end of the second wire frame section extends obliquely downward. The first mounting plate and the second mounting plate are adapted to the shapes of the first wire frame section and the second wire frame section. The plurality of partition rods include a first partition rod, a second partition rod, and a third partition rod arranged in sequence along the direction towards the reel. The first partition rod is disposed on the first wire frame section. The second partition rod is located at the connection between the first wire frame section and the second wire frame section. The third partition rod is disposed on the second wire frame section. The cross-sectional area of the second partition rod is larger than the cross-sectional area of the third partition rod. The cross-sectional area of the third partition rod is larger than the cross-sectional area of the first partition rod.

[0015] Additional aspects and advantages of the present invention will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present invention. Description of the Drawings

[0016] The above and / or additional aspects and advantages of the present invention will become apparent and be readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0017] Figure 1 is a schematic diagram of an indoor unit of an air conditioner according to an embodiment of the present invention.

[0018] Figure 2 It is a schematic cross-sectional view of an indoor unit of an air conditioner according to an embodiment of the present invention.

[0019] Figure 3 It is a schematic view of a self-cleaning mechanism according to an embodiment of the present invention.

[0020] Figure 4 It is a schematic view of a filter screen in an unfolded position according to an embodiment of the present invention.

[0021] Figure 5 It is a schematic view of a filter screen in a wound position according to an embodiment of the present invention.

[0022] Figure 6 It is Figure 3 An enlarged schematic view of region P in

[0023] Figure 7 It is Figure 4 An enlarged schematic view of region Q in

[0024] Reference numerals:

[0025] 100, indoor unit of an air conditioner;

[0026] 10, housing; 11, air inlet;

[0027] 20, indoor heat exchanger;

[0028] 30, fan assembly;

[0029] 40, filter screen; 41, clamping member;

[0030] 50, self-cleaning assembly; 51, base; 52, reel; 53, cleaning brush assembly; 54, dust collection box; 55, cleaning chamber; 551, first opening; 552, second opening;

[0031] 56, grid; 561, guide shaft; 5611, first guide shaft; 5612, second guide shaft; 562, receiving groove; 563, grid body; 5631, opening; 5632, sub-opening; 564, first mounting plate; 565, second mounting plate; 566, guide groove; 567, first grid segment; 568, second grid segment; 569, partition rod; 5691, first partition rod; 5692, second partition rod; 5693, third partition rod;

[0032] 57, tensioning device; 571, tensioning device body; 5711, telescopic bracket; 5712, telescopic connector; 572, connecting line;

[0033] A, thickness direction; B, length direction. Detailed implementation manners

[0034] With the wide use of air conditioners, users' requirements for air conditioners are also constantly increasing. An air conditioner performs a refrigeration cycle or a heating cycle through an indoor unit 100 of the air conditioner, an outdoor unit of the air conditioner, a compressor, a condenser, an expansion valve, and an evaporator.

[0035] The refrigeration cycle and the heating cycle include a compression process, a condensation process, an expansion process, and an evaporation process. In each process of the refrigeration cycle and the heating cycle, cold or heat is provided to the indoor space by the heat absorption or heat release of the refrigerant, thereby adjusting the temperature of the indoor space.

[0036] The compressor compresses the refrigerant gas into a high-temperature and high-pressure state and discharges it from the compressor. The refrigerant gas compressed by the compressor flows into the condenser. The condenser condenses the compressed high-temperature and high-pressure gaseous refrigerant into a liquid refrigerant, and the heat of the refrigerant is released to the surrounding environment through the condensation process.

[0037] The liquid refrigerant flowing out of the condenser enters the expansion valve, and the expansion valve expands the high-temperature and high-pressure liquid refrigerant condensed in the condenser into a low-pressure liquid refrigerant. The low-pressure liquid refrigerant flowing out of the expansion valve enters the evaporator, and the liquid refrigerant absorbs heat and evaporates into a low-temperature and low-pressure refrigerant gas when flowing through the evaporator. The refrigerant gas in the low-temperature and low-pressure state returns to the compressor.

[0038] The evaporator can achieve a refrigeration effect by using the latent heat of evaporation of the refrigerant to exchange heat with the material to be cooled. During the cyclic flow of the refrigerant, the indoor unit 100 of the air conditioner can send out hot air or cold air to adjust the temperature of the indoor space.

[0039] The indoor unit 100 of the air conditioner has an air inlet 11 and an air outlet. A filter screen 40 is provided at the air inlet 11 to filter the air entering the indoor unit 100 of the air conditioner and prevent dust and other sundries in the air from entering the indoor unit 100 of the air conditioner. After the indoor unit 100 of the air conditioner operates for a certain period of time, more sundries will adhere to the filter screen 40, causing part of the filter screen 40 to be blocked, resulting in a reduction in the air intake volume, thereby reducing the refrigeration or heating efficiency of the air conditioner.

[0040] Generally, a self-cleaning component 50 is provided in the indoor unit 100 of the air conditioner to clean the sundries adhering to the filter screen 40, so that the indoor unit 100 of the air conditioner can operate efficiently.

[0041] The embodiments of the present invention will be described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. The following reference Figures 1-7 Describe the indoor unit 100 of the air conditioner according to an embodiment of the present invention. The indoor unit 100 of the air conditioner includes a housing 10, an indoor heat exchanger 20, a fan assembly 30, a filter screen 40, and a self-cleaning mechanism.

[0042] Specifically, as Figure 1 and Figure 2 shown, an air inlet 11 and an air outlet are formed on the housing 10. The indoor heat exchanger 20 is disposed inside the housing 10 and is used for exchanging heat with the indoor air entering from the air inlet 11. The fan assembly 30 is disposed on the side of the indoor heat exchanger 20 away from the air inlet 11 and is used for causing the indoor air to flow in from the air inlet 11, exchange heat with the indoor heat exchanger 20, and then be sent out from the air outlet.

[0043] For example, when the fan assembly 30 operates, the fan rotates, sucks the indoor air from the air inlet 11, exchanges heat between the indoor air and the indoor heat exchanger 20, and then pumps the indoor air that has exchanged heat with the indoor heat exchanger 20 out from the air outlet.

[0044] It can be understood that the indoor air enters the housing 10 from the air inlet 11 under the action of the fan assembly 30 and enters the indoor heat exchanger 20 after being filtered by the filter screen 40. For example, when the indoor unit 100 of the air conditioner performs refrigeration, the indoor air forms cold air after exchanging heat with the indoor heat exchanger 20 and blows into the room from the air outlet.

[0045] It should be noted that the fan assembly 30 can lead the indoor air from the air inlet 11 to the indoor heat exchanger 20, increase the air intake volume entering the indoor heat exchanger 20 from the air inlet 11, and the fan assembly 30 can adjust the air intake volume entering the indoor heat exchanger 20.

[0046] The filter screen 40 is arranged between the air inlet 11 and the indoor heat exchanger 20 and covers the air inlet 11. The filter screen 40 is configured to filter the air entering the indoor unit 100 of the air conditioner from the air inlet 11 to prevent sundries in the air from entering the indoor unit 100 of the air conditioner.

[0047] For example, when the indoor unit 100 of the air conditioner operates, the indoor air entering the housing 10 from the air inlet 11 first passes through the filter screen 40, enters the indoor heat exchanger 20 after being filtered by the filter screen 40, so as to prevent sundries in the indoor air from entering the indoor heat exchanger 20, avoid the accumulation of sundries on the indoor heat exchanger 20 to form blockage, and reduce the heat exchange efficiency of the indoor heat exchanger 20. The indoor air that has exchanged heat with the indoor heat exchanger 20 is blown out from the air outlet under the action of the fan assembly 30.

[0048] The filter screen 40 is arranged between the air inlet 11 and the indoor heat exchanger 20. The filter screen 40 has a deployed position and a wound position, and is used to filter debris in the indoor air. The self-cleaning mechanism is detachably connected to the housing 10. Among them, the self-cleaning mechanism includes: a reel 52 and a tensioning device 57. The reel 52 is connected to one end of the filter screen 40, and the reel 52 drives the filter screen 40 to be movable between the deployed position and the wound position. When the filter screen 40 is in the deployed position, the filter screen 40 is deployed between the air inlet 11 and the indoor heat exchanger 20. When the filter screen 40 is in the wound position, the filter screen 40 is adapted to be wound around the reel 52. The tensioning device 57 is connected to the other end of the filter screen 40, and is used to keep the filter screen 40 in a tensioned state when the filter screen 40 moves between the deployed position and the wound position.

[0049] Combined Figures 1-3 , when the filter screen 40 is in the deployed position, the filter screen 40 covers the air inlet 11. When the filter screen 40 is in the wound position, the coverage of the air inlet 11 by the filter screen 40 is released. The filter screen 40 is movable between the deployed position and the wound position. The self-cleaning mechanism is arranged at one end of the filter screen 40 along the movement direction, and is configured to remove debris on the filter screen 40 when the filter screen 40 is wound or deployed.

[0050] The reel 52 is connected to one end of the filter screen 40 along the movement direction. The filter screen 40 can be wound around the reel 52. The reel 52 can rotate, and when the reel 52 rotates, it can drive the filter screen 40 to move between the deployed position and the wound position. The tensioning device 57 is connected to the other end of the filter screen 40 away from the self-cleaning mechanism along the movement direction. When the filter screen 40 moves between the deployed position and the wound position, the tensioning device 57 keeps the filter screen 40 in tension, which is beneficial to the movement of the filter screen 40.

[0051] When the filter screen 40 is in the deployed position, the tensioning device 57 applies a pulling force to the other end of the filter screen 40 away from the self-cleaning mechanism along the movement direction to ensure that the filter screen 40 remains in a tensioned state when it is in the deployed position. When the filter screen 40 is in the wound position, the tensioning device 57 applies a pulling force to the other end of the filter screen 40 away from the self-cleaning mechanism along the movement direction to ensure that the filter screen 40 still remains in a tensioned state when it is in the wound position.

[0052] The self-cleaning mechanism is arranged at one end of the housing 10 along the movement direction of the filter screen 40. The self-cleaning mechanism further includes: a base 51, a dust collection box 54 and a cleaning brush assembly 53. The reel 52 and the cleaning brush assembly 53 are rotatably connected to the base 51, and the reel 52 and the cleaning brush assembly 53 respectively extend along the length direction B of the housing 10. The filter screen 40 is wound around the outer periphery of the reel 52, and the filter screen 40 is tensioned on the reel 52. The cleaning brush assembly 53 is arranged at one end of the reel 52 along the movement direction of the filter screen 40, and is configured to clean the debris on the filter screen 40 during the process of the reel 52 winding up or unwinding the filter screen 40, that is, when the filter screen 40 moves between the deployed position and the wound position.

[0053] As Figure 3 and Figure 4 shown, the base 51 defines a cleaning chamber 55 with a first opening 551 at the top and a second opening 552 at the bottom. The top of the cleaning chamber 55 is open to form the first opening 551, and the bottom of the cleaning chamber 55 is open to form the second opening 552. The reel 52 is disposed at the first opening 551. The reel 52 is pivotally connected to the base 51. One end of the filter screen 40 is connected to the reel 52, and the other end of the filter screen 40 is connected to the connection line 572, which is used to filter debris in the indoor air. The dust collection box 54 is disposed at the second opening 552 and is used to collect the debris that falls into the cleaning chamber 55. The cleaning brush assembly 53 is disposed in the cleaning chamber 55. The cleaning brush assembly 53 is located in the cleaning chamber 55. The dust collection box 54 is disposed below the second opening 552. The dust collection box 54 is disposed opposite to the cleaning brush assembly 53 and is configured to accommodate the debris swept from the filter screen 40 by the cleaning brush assembly.

[0054] When the reel 52 rotates, the other end of the filter screen 40 that moves away from the reel 52 in the moving direction moves away from or close to the reel 52, that is, the filter screen 40 moves between the deployed position and the wound position. During the self-cleaning process of the self-cleaning assembly 50, at least a part of the cleaning brush assembly 53 contacts the filter screen 40, and as the filter screen 40 is wound and unwound on the reel 52, a relative movement is generated between the cleaning brush assembly 53 and the filter screen 40. The cleaning brush assembly 53 can be disposed opposite to different regions of the filter screen 40 and clean different regions of the filter screen 40. The debris on the filter screen 40 is swept into the dust collection box 54 by the cleaning brush assembly 53.

[0055] For the indoor unit 100 of the air conditioner according to the embodiment of the present invention, through the cooperation of the reel 52 and the tensioning device 57, the filter screen 40 can be moved between the deployed position and the wound position. The setting of the tensioning device 57 can keep the filter screen 40 in a tensioned state when it is in the deployed position and the wound position, which is convenient for the self-cleaning mechanism to clean the filter screen 40, is beneficial to improving the cleaning effect, and the structures of the reel 52 and the tensioning device 57 are simple, which can make the structure of the self-cleaning mechanism more compact, reduce the occupied space of the self-cleaning mechanism, and can also reduce the length of the filter screen 40 required in the indoor unit 100 of the air conditioner, which is beneficial to reducing the production cost.

[0056] According to some embodiments of the present invention, as Figure 3 shown, the self-cleaning mechanism further includes: a grid frame 56. The grid frame 56 is disposed in the housing 10. One end of the reel 52 is disposed adjacent to the grid frame 56. The tensioning device 57 is disposed on the grid frame 56. The filter screen 40 is movable along the grid frame 56 between the deployed position and the wound position. The grid frame 56 has a thickness direction A and a length direction B.

[0057] The reel 52 is arranged at one end of the grid frame 56 along the moving direction of the filter screen 40, the tensioning device 57 is arranged on the grid frame 56, the filter screen 40 is arranged on one side of the grid frame 56 adjacent to the housing 10 along the thickness direction A, and the base 51 is arranged at one end of the grid frame 56 adjacent to the reel 52 along the moving direction of the filter screen 40. The filter screen 40 is arranged opposite to the grid frame 56 along the thickness direction A of the grid frame 56, and can move relative to the grid frame 56 along a predetermined track on the grid frame 56.

[0058] When the filter screen 40 is in the deployed position, one end of the filter screen 40 away from the reel 52 along the moving direction abuts against one end of the grid frame 56 away from the reel 52 along the moving direction of the filter screen 40, and the filter screen 40 is completely laid on the grid frame 56. When the filter screen 40 moves from the deployed position to the winding position under the action of the reel 52 and the tensioning device 57, the other end of the filter screen 40 away from the reel 52 along the moving direction moves on the grid frame 56 relative to the grid frame 56 in the direction towards the reel 52 along the moving direction until the filter screen 40 moves to the winding position.

[0059] Thus, the grid frame 56 is used to install the tensioning device 57 and the filter screen 40. The grid frame 56 can provide a limiting effect and a certain supporting effect for the filter screen 40, support the movement of the filter screen 40, and ensure the movement stability of the filter screen 40.

[0060] According to some embodiments of the present invention, as Figure 4 and Figure 5 shown, the tensioning device 57 is arranged adjacent to the reel 52. The tensioning device 57 includes a tensioning device body 571 and a connecting line 572. The tensioning device body 571 is arranged on the grid frame 56, one end of the connecting line 572 is telescopically connected to the tensioning device body 571, and the other end of the connecting line 572 is connected to the other end of the filter screen 40.

[0061] A plurality of guide shafts 561 are arranged on the grid frame 56. The plurality of guide shafts 561 include a first guide shaft 5611 and a second guide shaft 5612. The first guide shaft 5611 is arranged at one end of the grid frame 56 away from the reel 52, and the second guide shaft 5612 is located between the first guide shaft 5611 and the reel 52. When the filter screen 40 is in the winding position, the other end of the connecting line 572 bypasses the first guide shaft 5611 and the second guide shaft 5612 and is connected to the other end of the filter screen 40.

[0062] The tensioning device 57 is arranged adjacent to the reel 52 along the moving direction of the filter screen 40. The tensioning device body 571 is arranged on at least one side of the grid frame 56 along the length direction B. One end of the connecting line 572 is connected to the tensioning device body 571, and the other end of the connecting line 572 is connected to the other end of the filter screen 40 that is far from the reel 52 along the moving direction. The first guiding shaft 5611 is arranged at the end of the grid frame 56 that is far from the reel 52 along the moving direction of the filter screen 40. The first guiding shaft 5611 protrudes from the side of the grid frame 56 along the length direction B of the grid frame 56. The second guiding shaft 5612 is arranged between the first guiding shaft 5611 and the reel 52 of the grid frame 56 along the moving direction of the filter screen 40. The second guiding shaft 5612 protrudes from the side of the grid frame 56 along the length direction B of the grid frame 56. The first guiding shaft 5611, the second guiding shaft 5612 and the tensioning device 57 are all arranged on the same side of the grid frame 56.

[0063] When the filter screen 40 is in the deployed position, the other end of the connecting line 572 bypasses the first guiding shaft 5611 and is connected to the other end of the filter screen 40, and applies a pulling force to the other end of the filter screen 40, so that the filter screen 40 remains in a tensioned state in the deployed position. When the filter screen 40 is in the winding position, the other end of the filter screen 40 moves to one end of the grid frame 56 that is adjacent to the reel 52 along the moving direction of the filter screen 40. The pulling force applied by the reel 52 on the filter screen 40 is greater than the pulling force applied by the connecting line 572 on the filter screen 40. The other end of the connecting line 572 bypasses the first guiding shaft 5611 and the second guiding shaft 5612 and is connected to the other end of the filter screen 40. The connecting line 572 gradually elongates as the filter screen 40 moves, so that the filter screen 40 remains in a tensioned state in the winding position, and wrinkles are avoided during the winding process of the filter screen 40, which affects the service life of the filter screen 40.

[0064] Therefore, the arrangement of the tensioning device body 571 and the connecting line 572 facilitates the tensioning device 57 to continuously provide a pulling force for the other end of the filter screen 40 that is far from the reel 52, so that the filter screen 40 remains in a tensioned state. The arrangement of the first guiding shaft 5611 and the second guiding shaft 5612 can guide the moving direction of the connecting line 572 when the connecting line 572 moves along with the filter screen 40, facilitate the connecting line 572 to change the direction, and facilitate the improvement of the movement stability of the connecting line 572, and prevent the connecting line 572 from being wound during the movement process.

[0065] According to some embodiments of the present invention, as Figure 4 and Figure 5 shown, the cross-sectional shapes of the first guiding shaft 5611 and the second guiding shaft 5612 are both circular.

[0066] The first guide shaft 5611 and the second guide shaft 5612 are circular, which is more convenient for guiding the connecting line 572 to change the direction of movement. During the movement, the connecting line 572 undergoes relative friction with the first guide shaft 5611 and the second guide shaft 5612. The arc-shaped arrangement of the first guide shaft 5611 and the second guide shaft 5612 can reduce the frictional force between the first guide shaft 5611 and the second guide shaft 5612 and the connecting line 572, reduce the wear during the movement of the connecting line 572, make the movement process of the filter screen 40 smoother, and at the same time can extend the service life of the connecting line 572.

[0067] In some alternative embodiments, the cross-sectional area of the first guide shaft 5611 is smaller than the cross-sectional area of the second guide shaft 5612.

[0068] The first guide shaft 5611 is located at the end of the other end of the grid frame 56 away from the reel 52 along the movement direction of the filter screen 40. The connecting line 572 bypasses the first guide shaft 5611 and the angle changes by 180°. The smaller cross-sectional area of the first guide shaft 5611 is beneficial for the connecting line 572 to make a larger angle turn. The second guide shaft 5612 is located between the first guide shaft 5611 and the reel 52. The angle change of the connecting line 572 bypassing the second guide shaft 5612 is less than 90°. The larger cross-sectional area of the second guide shaft 5612 is beneficial for the connecting line 572 to make a smaller angle turn. The cross-sectional area of the first guide shaft 5611 being smaller than the cross-sectional area of the second guide shaft 5612 can make the movement of the connecting line 572 more stable and smooth.

[0069] According to some embodiments of the present invention, as Figure 4 、 Figure 5 and Figure 7 shown, the tensioning device body 571 includes: a telescopic bracket 5711 and a telescopic connector 5712. The telescopic bracket 5711 is provided on the grid frame 56, and the telescopic connector 5712 is provided in the telescopic bracket 5711. One end of the connecting line 572 is adapted to be wound around the telescopic connector 5712, and the telescopic connector 5712 is configured to apply a pulling force on the filter screen 40 in a direction opposite to the pulling force applied by the reel 52 on the filter screen 40.

[0070] An accommodation cavity is defined inside the telescopic support 5711 for installing the telescopic connector 5712. A through hole is formed on the side wall of the telescopic support 5711 away from the reel 52 along the movement direction of the filter screen 40. The through hole penetrates through the side wall of the telescopic support 5711 to facilitate the connection line 572 to pass through the through hole and connect with the filter screen 40. The telescopic connector 5712 includes an elastic member. The telescopic connector 5712 has a contracted state and an extended state. The telescopic connector 5712 is connected to the filter screen 40 through the connection line 572. One end of the connection line 572 is wound around the telescopic connector 5712, and the other end of the connection line 572 is connected to the filter screen 40. The telescopic connector 5712 always applies a pulling force to the filter screen 40 in the direction opposite to the pulling force applied by the reel 52 on the filter screen 40 through the connection line 572.

[0071] When the filter screen 40 is in the unfolded position, the telescopic connector 5712 is in the contracted state. A part of the connection line 572 is wound around the telescopic connector 5712 inside the telescopic support 5711, and the part of the connection line 572 outside the telescopic support 5711 bypasses the first guide shaft 5611 and is connected to the filter screen 40. When the filter screen 40 is in the wound position, the telescopic connector 5712 is in the extended state. A part of the connection line 572 wound around the telescopic connector 5712 is released under the pulling force of the reel 52, and the side length of the part of the connection line 572 outside the telescopic support 5711 increases. The part of the connection line 572 outside the telescopic support 5711 bypasses the first guide shaft 5611 and the second guide shaft 5612 and is connected to the filter screen 40.

[0072] Thus, the telescopic support 5711 is used to install the telescopic connector 5712 and the connection line 572. The telescopic support 5711 can provide a certain protection for the telescopic connector 5712, and can ensure the stable operation of the telescopic connector 5712 and the connection line 572. The telescopic connector 5712 can adjust the length of the connection line 572 outside the telescopic support 5711, and continuously apply a pulling force to the filter screen 40 to ensure that the filter screen 40 remains in a tensioned state.

[0073] According to some embodiments of the present invention, as Figure 4 、 Figure 5 and Figure 7 shown, accommodation grooves 562 are formed on the grid frame 56. One side of the accommodation groove 562 facing the filter screen 40 along the thickness direction A of the grid frame 56 is open, and the tensioning device 57 is arranged in the accommodation groove 562.

[0074] The accommodation groove 562 is used to install the tensioning device 57. The accommodation groove 562 is arranged on one side of the grid frame 56 along the length direction B. The accommodation groove 562 is formed by a part of the grid frame 56 recessing in the direction away from the filter screen 40 along the thickness direction A of the grid frame 56. The accommodation groove 562 is arranged opposite to the filter screen 40 along the thickness direction A of the grid frame 56.

[0075] Thus, the accommodation groove 562 is provided for installing the tensioning device 57. The accommodation groove 562 can provide a certain protection for the tensioning device 57, so as to facilitate the stable operation of the tensioning device 57. The tensioning device 57 is arranged in the accommodation groove 562, which can improve the integration of the grid 56 and make the mechanism of the grid 56 more concise.

[0076] According to some embodiments of the present invention, as Figures 3-6 shown, it further includes: a clamping member 41, the clamping member 41 is arranged at the other end of the filter screen 40, and the tensioning device 57 is connected to the clamping member 41.

[0077] The clamping member 41 extends along the length direction B of the grid 56. The clamping member 41 is connected to one end of the filter screen 40 away from the reel 52 along the moving direction. When the filter screen 40 moves relative to the grid 56, the clamping member 41 moves relative to the grid 56 along with the movement of the filter screen 40. A connecting portion is provided at one end of the clamping member 41 along the length direction B of the grid 56 for connecting with the connecting line 572 of the tensioning device 57.

[0078] Thus, the arrangement of the clamping member 41 facilitates the filter screen 40 to maintain a tensioned state in the length direction B of the grid 56. The connection between the clamping member 41 and the tensioning device 57 facilitates the tensioning device 57 to apply a pulling force to the filter screen 40 through the clamping member 41 to ensure that the filter screen 40 maintains a tensioned state in the moving direction, so as to ensure the filtering effect of the filter screen 40 on the impurities in the air.

[0079] According to some embodiments of the present invention, as Figures 3-6 shown, the grid 56 includes: a grid body 563, a first mounting plate 564 and a second mounting plate 565. The grid body 563 is arranged between the air inlet 11 and the indoor heat exchanger 20. An opening 5631 is formed on the grid body 563. When the filter screen 40 is in the unfolded position, the filter screen 40 faces the grid body 563. The first mounting plate 564 and the second mounting plate 565 are respectively connected to both sides of the grid body 563 along the length direction B of the housing 10. Guide grooves 566 are formed on the opposite surfaces of the first mounting plate 564 and the second mounting plate 565. Both ends of the clamping member 41 are respectively fitted in the guide grooves 566 of the first mounting plate 564 and the second mounting plate 565. When the filter screen 40 moves between the unfolded position and the winding position, the clamping member 41 is movable in the guide grooves 566.

[0080] The opening 5631 penetrates through the grid body 563 along the thickness direction A of the grid 56. When the filter screen 40 is in the deployed position, the filter screen 40 is disposed opposite to the grid body 563 along the thickness direction A of the grid 56. The first mounting plate 564 is provided on one side of the grid body 563 along the length direction B of the grid 56, and the second mounting plate 565 is provided on the other side of the grid body 563 along the length direction B of the grid 56. The first mounting plate 564 and the second mounting plate 565 are disposed opposite to each other along the length direction B of the grid 56.

[0081] The first mounting plate 564 and the second mounting plate 565 extend along the movement direction of the filter screen 40. A guiding groove 566 is formed on the surface of the first mounting plate 564 on the side adjacent to the grid body 563 along the length direction B of the grid 56. The guiding groove 566 is recessed from a part of the surface of the first mounting plate 564 on the side adjacent to the grid body 563 along the length direction B of the grid 56 towards the direction away from the grid body 563, and the guiding groove 566 extends along the movement direction of the filter screen 40. A guiding groove 566 is formed on the surface of the second mounting plate 565 on the side adjacent to the grid body 563 along the length direction B of the grid 56. The guiding groove 566 is recessed from a part of the surface of the second mounting plate 565 on the side adjacent to the grid body 563 along the length direction B of the grid 56 towards the direction away from the grid body 563. The guiding groove 566 of the first mounting plate 564 is opposite to the guiding groove 566 of the second mounting plate 565 along the length direction B of the grid 56.

[0082] One end of the clamping member 41 along the length direction B of the grid 56 is fitted into the guiding groove 566 of the first mounting plate 564, and the other end of the clamping member 41 along the length direction B of the grid 56 is fitted into the guiding groove 566 of the second mounting plate 565. When the filter screen 40 moves between the deployed position and the winding position, the clamping member 41 moves along the movement direction of the filter screen 40 in the guiding groove 566 as the filter screen 40 moves.

[0083] Thus, an opening 5631 is formed on the grid body 563 to facilitate ventilation. The arrangements of the first mounting plate 564 and the second mounting plate 565 facilitate the installation of the filter screen 40 and the clamping member 41. The guiding groove 566 defines the movement trajectory of the clamping member 41, enhances the stability of the cooperation between the clamping member 41 and the grid 56, improves the stability of the filter screen 40 when moving relative to the grid body 563, prevents the filter screen 40 from falling off the grid 56, and the arrangement of the clamping member 41 can keep the filter screen 40 in a tensioned state in the length direction B of the grid 56 during movement, so as to facilitate the filter screen 40 to filter impurities in the air.

[0084] According to some embodiments of the present invention, such as Figures 3-5As shown, a plurality of partition rods 569 are provided in the opening 5631. The plurality of partition rods 569 are arranged at intervals along the moving direction of the filter screen 40. Each partition rod 569 extends along the length direction B of the housing 10. The plurality of partition rods 569 divide the opening 5631 into a plurality of sub-openings 5632. When the filter screen 40 is in the unfolded position, the clamping member 41 moves to one end of the wire frame 56 away from the reel 52, and the filter screen 40 completely covers all the sub-openings 5632. When the filter screen 40 is in the wound position, the filter screen 40 is wound around the reel 52, and the filter screen 40 and the clamping member 41 avoid all the sub-openings 5632.

[0085] Each partition rod 569 extends along the length direction B of the wire frame 56. The plurality of partition rods 569 are arranged at intervals along the moving direction of the filter screen 40 on the wire frame body 563 to divide the opening 5631 into a plurality of sub-openings 5632. When the filter screen 40 is in the unfolded position, the filter screen 40 is arranged opposite to the plurality of partition rods 569 and the plurality of sub-openings 5632 along the thickness direction A of the wire frame 56.

[0086] When the filter screen 40 is in the unfolded position, the clamping member 41 moves to one end of the wire frame 56 away from the reel 52 along the moving direction of the filter screen 40. The filter screen 40 completely covers all the sub-openings 5632 so that the filter screen 40 can filter the impurities in the air, and the plurality of partition rods 569 can better support the filter screen 40 to make the force on the wire frame 56 uniform. When the filter screen 40 is in the wound position, the clamping member 41 moves to one end of the wire frame 56 adjacent to the reel 52 along the moving direction of the filter screen 40. The sub-openings 5632 on the wire frame 56 are in an open and unobstructed state, and the air entering the air inlet 11 does not pass through the filter screen 40, which is beneficial to increasing the air flow rate and the air intake volume.

[0087] Therefore, the arrangement of the plurality of partition rods 569 on the wire frame 56 can enhance the structural strength of the wire frame 56, improve the supporting force of the wire frame 56 on the filter screen 40 so that the filter screen 40 fits with the wire frame 56 when the filter screen 40 is in the unfolded position, and also facilitates the filter screen 40 to be supported when moving between the unfolded position and the wound position, and improves the stability of the movement of the filter screen 40.

[0088] According to some embodiments of the present invention, such as Figures 3-5As shown, the grid body 563 includes: a first grid section 567 and a second grid section 568. The first grid section 567 extends horizontally. The rear end of the second grid section 568 is connected to the front end of the first grid section 567. The front end of the second grid section 568 extends obliquely downward. The first mounting plate 564 and the second mounting plate 565 are adapted to the shapes of the first grid section 567 and the second grid section 568. The plurality of partition rods 569 include a first partition rod 5691, a second partition rod 5692, and a third partition rod 5693 arranged in sequence along the direction towards the reel 52. The first partition rod 5691 is provided on the first grid section 567. The second partition rod 5692 is located at the connection between the first grid section 567 and the second grid section 568. The third partition rod 5693 is provided on the second grid section 568. The cross-sectional area of the second partition rod 5692 is larger than that of the third partition rod 5693, and the cross-sectional area of the third partition rod 5693 is larger than that of the first partition rod 5691.

[0089] An included angle is formed between the first grid section 567 and the second grid section 568. The first partition rod 5691 is located at one end of the grid body 563 away from the reel 52 along the movement direction of the filter screen 40, that is, at one end of the first grid section 567 away from the reel 52 along the movement direction of the filter screen 40. The third partition rod 5693 is located at one end of the grid body 563 adjacent to the reel 52 along the direction of the filter screen 40, that is, at one end of the second grid section 568 adjacent to the reel 52 along the movement direction of the filter screen 40. The second partition rod 5692 is located between the first partition rod 5691 and the third partition rod 5693, that is, the second partition rod 5692 is located at one end of the first grid section 567 adjacent to the reel 52 along the movement direction of the filter screen 40 and one end of the second grid section 568 away from the reel 52 along the movement direction of the filter screen 40.

[0090] Thus, an included angle is formed between the first grid section 567 and the second grid section 568, and the first mounting plate 564 and the second mounting plate 565 are adapted to the shapes of the first grid section 567 and the second grid section 568, which is convenient for the installation of the filter screen 40 on the grid 56. The arrangements of the first partition rod 5691, the second partition rod 5692, and the third partition rod 5693 are convenient for enhancing the structural strength of the grid 56. The larger cross-sectional area of the second partition rod 5692 is beneficial to improving the connection strength between the first grid section 567 and the second grid section 568 and enhancing the structural strength at the inclined bending part of the grid body 563.

[0091] In this embodiment, the air conditioner indoor unit 100 includes two self-cleaning mechanisms. The two self-cleaning mechanisms are arranged in the housing 10 at intervals along the length direction B of the housing 10, that is, along the length direction B of the filter screen 40. The self-cleaning mechanism is arranged on the front side of the housing 10, and the connection between the base 51 included in the self-cleaning mechanism and the housing 10 is detachable, and the connection methods include but are not limited to snap connection, plug connection, screw connection, etc.

[0092] The scroll 52 can rotate clockwise or counterclockwise under the drive of the motor. For example, when the scroll 52 rotates clockwise, the filter screen 40 moves from the wound position to the deployed position. During the movement of the filter screen 40, one end of the filter screen 40 away from the scroll 52 is provided with a tensioning device 57 to utilize the elastic contraction ability of the tensioning device body 571 inside the tensioning device 57 to keep the filter screen 40 taut when the filter screen 40 moves from the wound position to the deployed position.

[0093] When the filter screen 40 moves from the deployed position to the wound position, the scroll 52 rotates counterclockwise to drive the filter screen 40 to wind around the scroll 52. At this time, the force exerted by the scroll 52 on the filter screen 40 overcomes the pulling force exerted by the tensioning device body 571 inside the tensioning device 57 on the filter screen 40, keeping the filter screen 40 taut while winding, which is beneficial to the cleaning of the filter screen 40 by the cleaning brush assembly 53. Moreover, the structure of the tensioning device 57 is simple, which is convenient for optimizing the space inside the base 51 and increasing the utilization rate of the space inside the base 51.

[0094] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention.

[0095] In the description of the present invention, the "first feature" and "second feature" may include one or more of such features. In the description of the present invention, the meaning of "a plurality" is two or more. In the description of the present invention, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through additional features therebetween. In the description of the present invention, the first feature being "above", "over" and "on" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the horizontal height of the first feature is higher than that of the second feature.

[0096] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples", etc., mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example.

[0097] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the claims and their equivalents.

Claims

1. An indoor unit of an air conditioner, comprising: A housing, on which an air inlet and an air outlet are formed; An indoor heat exchanger, which is arranged in the housing and is used for exchanging heat with indoor air entering from the air inlet; A fan assembly, which is arranged on a side of the indoor heat exchanger away from the air inlet and is used for making indoor air flow in from the air inlet, exchanging heat with the indoor heat exchanger, and then being sent out from the air outlet; It is characterized in that the indoor unit of the air conditioner further comprises: A filter screen, which is arranged between the air inlet and the indoor heat exchanger. The filter screen has an unfolded position and a wound position and is used for filtering sundries in indoor air; At least one self-cleaning mechanism, which is detachably connected to the housing, Wherein, the self-cleaning mechanism comprises: A reel, which is connected to one end of the filter screen. The reel drives the filter screen to be movable between the unfolded position and the wound position. When the filter screen is in the unfolded position, the filter screen is unfolded between the air inlet and the indoor heat exchanger. When the filter screen is in the wound position, the filter screen is adapted to be wound on the reel; A tensioning device, which is connected to the other end of the filter screen and is used for keeping the filter screen in a tensioned state when the filter screen moves between the unfolded position and the wound position.

2. The indoor unit of the air conditioner according to claim 1, characterized in that, The self-cleaning mechanism further comprises: A wire frame, which is arranged in the housing. One end of the reel is arranged adjacent to the wire frame. The tensioning device is arranged on the wire frame. The filter screen is movable along the wire frame between the unfolded position and the wound position.

3. The indoor unit of the air conditioner according to claim 2, characterized in that, The tensioning device is arranged adjacent to the reel. The tensioning device comprises a tensioning device body and a connecting line. The tensioning device body is arranged on the wire frame. One end of the connecting line is telescopically connected to the tensioning device body. The other end of the connecting line is connected to the other end of the filter screen; A plurality of guide shafts are arranged on the wire frame. The plurality of guide shafts include a first guide shaft and a second guide shaft. The first guide shaft is arranged at one end of the wire frame away from the reel. The second guide shaft is located between the first guide shaft and the reel. When the filter screen is in the wound position, the other end of the connecting line bypasses the first guide shaft and the second guide shaft and is connected to the other end of the filter screen.

4. The indoor unit of an air conditioner according to claim 3, characterized in that, The cross-sectional shapes of the first guide shaft and the second guide shaft are both circular; and / or The cross-sectional area of the first guide shaft is smaller than the cross-sectional area of the second guide shaft.

5. The indoor unit of the air conditioner according to claim 3, characterized in that, The tensioning device body comprises: A telescopic bracket, which is arranged on the wire frame; A telescopic connector, which is arranged in the telescopic bracket. One end of the connecting line is adapted to be wound on the telescopic connector. The telescopic connector is configured to apply a pulling force on the filter screen in a direction opposite to the pulling force applied by the reel on the filter screen.

6. The indoor unit of an air conditioner according to claim 2, characterized in that, A receiving groove is formed on the wire frame. One side of the receiving groove facing the filter screen along the thickness direction of the wire frame is open. The tensioning device is arranged in the receiving groove.

7. The indoor unit of an air conditioner according to any one of claims 2-6, characterized in that, It further comprises: A clamping member, the clamping member is provided at the other end of the filter screen, and the tensioning device is connected to the clamping member.

8. The indoor unit of the air conditioner according to claim 7, characterized in that, The grid frame includes: A grid frame body, the grid frame body is arranged between the air inlet and the indoor heat exchanger, an opening is formed on the grid frame body, and when the filter screen is in the unfolded position, the filter screen faces the grid frame body; A first mounting plate and a second mounting plate, the first mounting plate and the second mounting plate are respectively connected to both sides of the grid frame body along the length direction of the housing, guide grooves are formed on the surfaces of the first mounting plate and the second mounting plate facing each other, and both ends of the clamping member are respectively fitted in the guide grooves of the first mounting plate and the second mounting plate, and the clamping member is movable in the guide grooves when the filter screen moves between the unfolded position and the winding position.

9. The indoor unit of the air conditioner according to claim 8, characterized in that, A plurality of partition rods are arranged in the opening, the plurality of partition rods are arranged at intervals along the movement direction of the filter screen, each partition rod extends along the length direction of the housing, and the plurality of partition rods divide the opening into a plurality of sub-openings; When the filter screen is in the unfolded position, the clamping member moves to one end of the grid frame away from the reel, and the filter screen completely covers all the sub-openings; When the filter screen is in the winding position, the filter screen is wound on the reel, and the filter screen and the clamping member avoid all the sub-openings.

10. The indoor unit of an air conditioner according to claim 9, characterized in that, The grid frame body includes: A first grid frame section, the first grid frame section extends horizontally; A second grid frame section, the rear end of the second grid frame section is connected to the front end of the first grid frame section, the front end of the second grid frame section extends obliquely downward, and the first mounting plate and the second mounting plate are adapted to the shapes of the first grid frame section and the second grid frame section. The plurality of partition rods include a first partition rod, a second partition rod and a third partition rod arranged in sequence along the direction towards the reel, the first partition rod is arranged on the first grid frame section, the second partition rod is located at the connection between the first grid frame section and the second grid frame section, the third partition rod is arranged on the second grid frame section, the cross-sectional area of the second partition rod is larger than the cross-sectional area of the third partition rod, and the cross-sectional area of the third partition rod is larger than the cross-sectional area of the first partition rod.

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