Return air filtering structure and air conditioner

Abstract

The invention provides a return air filtering structure and an air conditioner, and relates to the technical field of air conditioners. The return air filtering structure comprises a base plate and a filter screen assembly, the base plate comprises a mounting area and an air return area, the air return area comprises a first air return opening and a first enclosure frame arranged on the first air return opening in an enclosing mode, first supporting ribs are connected between opposite frame strips of the first enclosure frame, and first supporting protrusions are arranged on the outer wall faces of the first enclosure frame and the first supporting ribs; the filter screen assembly comprises a filter screen, a first reel and a second reel, the first reel and the second reel are rotationally connected to the mounting area, the two ends of the filter screen are wound around the first reel and the second reel in a one-to-one correspondence mode, and the screen section, located between the first reel and the second reel, of the filter screen completely shields the first air return opening and at least shields part of the first supporting protrusion. The air conditioner adopts the return air filtering structure, and the top plate of the middle frame of the air conditioner serves as a base plate of the return air filtering structure. The return air filter structure can improve the conveying cleanliness, the effective service life and the conveying smoothness of the filter screen.

Description

Technical Field

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

[0002] Air conditioners are widely used for temperature regulation in indoor environments. In order to reduce the blockage and pollution of air duct components caused by dust and the like when the air flows through the air duct of the air conditioner, existing air conditioners generally install filters at the return air outlet of the air conditioner; further, in order to reduce the frequency of replacing the filters, some air conditioners use filter rolls that can be used to transport the replacement mesh segments at the return air outlet. However, during the process of transporting the replacement mesh segments, the filter rolls are not tensioned or are tensioned but the distance from the return air outlet is small, so the filter is easily rubbed against the support ribs and the surrounding frame of the return air outlet, which results in dust and serious wear during the transmission of the filter, and the transmission friction resistance is large and the transmission smoothness is poor. Summary of the invention

[0003] The purpose of the present invention includes providing a return air filtering structure and an air conditioner to solve the technical problems of dust raising and serious wear of the filter screen during transmission in the existing air conditioner, large transmission friction resistance and poor transmission smoothness.

[0004] In order to solve the above problems, the present invention provides a return air filter structure, which is applied to an air conditioner, wherein the return air filter structure comprises a substrate and a filter assembly, wherein the substrate comprises an installation area and a return air area, wherein the return air area comprises a first return air port and a first enclosure frame arranged around the first return air port, wherein first supporting ribs are connected between opposite frame bars of the first enclosure frame, and first supporting protrusions are arranged on the outer wall surface of the first enclosure frame and / or the first supporting ribs;

[0005] The filter assembly includes a filter and a first reel and a second reel rotatably connected to the installation area, two ends of the filter are wound around the first reel and the second reel one by one, and the filter segment between the first reel and the second reel completely blocks the first return air outlet and at least partially blocks the first supporting protrusion.

[0006] When the return air filter structure provided by the present invention is applied to an air conditioner, the first reel and the second reel tension the mesh segment therebetween, and the mesh segment is blocked at the outside of the first return air outlet. The airflow flowing through the first return air outlet needs to be filtered by the mesh segment, thereby improving the cleanliness of the airflow flowing into the air duct, reducing the blockage and pollution of various components in the air duct caused by impurities and dust entrained in the airflow, and correspondingly ensuring the normal operation of the air conditioner. After a period of use, when the mesh segment is covered and blocked by dust, the first reel and the second reel can be rotated to release the clean filter on one of them, and at the same time, the used filter is wound around the other, and the released filter is transmitted to the outside of the first return air outlet to become a new mesh segment, so as to effectively filter the airflow flowing through the first return air outlet and ensure the ventilation volume of the first return air outlet, thereby reducing the frequency of filter replacement and cleaning on the basis of ensuring effective filtration of the filter, and improving the practicality of the air conditioner; wherein, when the mesh segment is bent downward toward the middle frame due to not being tensioned during transmission, or when the distance between its two ends and the top plate is small in the tensioned state, the first support The convex protrudes outward relative to the top plate and is in the shielding area of ​​the network segment, so the first supporting convexity can support the network segment during the transmission process. Accordingly, the network segment only generates sliding friction with the first supporting convexity during transmission. Compared with the sliding friction with the entire outer wall surface of the first surrounding frame and the first supporting rib during transmission of the network segment, the contact area between the first supporting convexity and the network segment is much smaller than the first surrounding frame and the first supporting rib. The relative operation between the two generates less dust, wear and friction on the network segment, thereby effectively reducing the dust, wear and friction resistance generated during the transmission of the filter screen, and correspondingly improving the transmission cleanliness, effective service life and transmission smoothness of the filter screen.

[0007] Optionally, the first scroll and the second scroll are respectively located on both sides of the length direction of the first return air outlet, the frame bars of the first enclosure located on both sides of the width direction of the first return air outlet are first frame bars, and the first supporting ribs are connected between the two first frame bars; there are multiple first supporting protrusions located on the outer frame surfaces of the two first frame bars, and the multiple first supporting protrusions located on the same first frame bar are arranged at intervals along its length direction.

[0008] Optionally, among the multiple first supporting protrusions located on the same first frame strip, two of them serve as first end supporting protrusions, and the remaining first supporting protrusions serve as first middle supporting protrusions, and the two first end supporting protrusions are located one-to-one at the two end positions in the length direction of the first frame strip.

[0009] Optionally, the return air filtering structure also includes a pressure cover, the pressure cover includes a first cover area and a second cover area, the second cover area includes a second return air outlet and a second surrounding frame surrounding the second return air outlet; the pressure cover is detachably connected to the base plate, the first reel and the second reel are both covered in the first cover area, and the second return air outlet corresponds to the first return air outlet.

[0010] Optionally, second supporting ribs are connected between opposite frame bars of the second surrounding frame, and second supporting protrusions are provided on the inner wall surface of the second surrounding frame and / or the second supporting ribs.

[0011] Optionally, the return air filtering structure also includes a pressure cover, the pressure cover includes a first cover area and a second cover area, the second cover area includes a second return air outlet and a second frame surrounding the second return air outlet; the pressure cover is detachably connected to the base plate, the first reel and the second reel are both covered in the first cover area, and the second return air outlet corresponds to the first return air outlet; the frame bars of the second frame located on both sides of the width direction of the second return air outlet are second frame bars, and second supporting ribs are connected between the two second frame bars, and the inner frame surface of the second frame bar is provided with a plurality of second supporting protrusions, and the plurality of second supporting protrusions are arranged at intervals along the length direction of the second frame bar.

[0012] Optionally, among the multiple second supporting protrusions located on the same second frame strip, two of them serve as second end supporting protrusions, and the remaining second supporting protrusions serve as second middle supporting protrusions. The two second end supporting protrusions are located one-to-one at the two end positions in the length direction of the second frame strip, and the second middle supporting protrusion is located between the two second end supporting protrusions.

[0013] Optionally, the sum of the length of the second supporting protrusion and the length of the corresponding first supporting protrusion is not less than the distance between the second frame and the first frame, and multiple first supporting protrusions and multiple second supporting protrusions correspond one-to-one to form a tensioning group. The second supporting protrusion and the first supporting protrusion of the same tensioning group are staggered along the length direction of the first return air outlet, and a tensioning gap is left between the two for the network segment to pass through.

[0014] Optionally, the first supporting protrusion is strip-shaped and its length direction is consistent with the width direction of the first return air outlet, and the contour line formed by the outer convex surface of the first end supporting protrusion in its cross section is an arc segment; and / or, the contour line formed by the outer convex surface of the first middle supporting protrusion in its cross section includes a first convex arc segment, a first straight line segment and a second convex arc segment which are connected in sequence with a smooth transition, and the first straight line segment is parallel to the plane where the outer port of the first return air outlet is located;

[0015] And / or, the second supporting protrusion is strip-shaped and its length direction is consistent with the width direction of the second return air outlet, and the contour line formed by the outer convex surface of the second end supporting protrusion in its cross section is an arc segment; and / or, the contour line formed by the outer convex surface of the second middle supporting protrusion in its cross section includes a third convex arc segment, a second straight line segment and a fourth convex arc segment connected in sequence with smooth transitions, and the second straight line segment is parallel to the plane where the external port of the second return air outlet is located.

[0016] Optionally, an end surface of the first supporting protrusion facing the first air return port is coplanar with an inner ring wall surface of the first surrounding frame;

[0017] And / or, an end surface of the second supporting protrusion facing the second air return outlet is coplanar with the inner ring wall surface of the second surrounding frame.

[0018] Optionally, the first surrounding frame and the first supporting rib form a first supporting frame, and the outer frame surface of the first supporting frame is provided with an ash containing groove consistent with the extension direction of the first supporting rib, and the ash containing groove includes a middle ash containing section located at the first supporting rib and end ash containing sections located at both ends of the middle ash containing section, and along the axial direction of the first reel, the ash containing groove completely covers the area where the mesh segment is located.

[0019] Optionally, a slot is provided at the first side edge of the first return air outlet, and a snap hole is provided at the frame strips corresponding to the first surrounding frame and the second side edge of the first return air outlet; a plug buckle and a snap buckle are respectively provided at the opposite ends of the pressure cover, the plug buckle is plugged into the slot, and the snap buckle is snapped into the snap hole.

[0020] The present invention further provides an air conditioner, which adopts the above-mentioned return air filtering structure, and the top plate of the middle frame of the air conditioner serves as the substrate of the return air filtering structure.

[0021] The air conditioner provided by the present invention adopts the above-mentioned return air filtering structure and has all the beneficial effects of the return air filtering structure, which will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0023] Figure 1 An axonometric diagram of the air conditioner provided by the present invention;

[0024] Figure 2 A longitudinal cross-sectional view of the air conditioner provided by the present invention;

[0025] Figure 3 for Figure 2 A partial enlarged view of middle A;

[0026] Figure 4 An exploded diagram of the air conditioner provided by the present invention;

[0027] Figure 5An axonometric view of the air conditioner provided by the present invention after the gland is removed;

[0028] Figure 6 for Figure 5 A partial enlarged view of B in the middle;

[0029] Figure 7 for Figure 5 Axonometric view of the central air conditioner after the filter is removed;

[0030] Figure 8 for Figure 7 A partial enlarged view of middle C;

[0031] Fig. 9 An axonometric view of the gland in the return air filter structure provided by the present invention;

[0032] Fig.10 for Fig. 9 A partial enlarged view of D in the middle.

[0033] Description of reference numerals:

[0034] 10-middle frame; 100-base plate; 110-installation area; 120-return air area; 121-first return air outlet; 122-first enclosure; 122a-first frame bar; 123-first support rib; 124-first support protrusion; 124a-first end support protrusion; 124b-first middle support protrusion; 1241-first convex arc segment; 1242-first straight line segment; 1243-second convex arc segment; 124c-ash storage slot; 1244-middle ash storage segment; 1245-end ash storage segment; 125-slot; 126-card hole; 200-filter assembly ; 210-filter; 211-net segment; 220-first reel; 230-second reel; 300-pressing cover; 310-first cover area; 320-second cover area; 321-second return air outlet; 322-second enclosure; 322a-second frame bar; 323-second supporting rib; 324-second supporting protrusion; 324a-second end supporting protrusion; 324b-second middle supporting protrusion; 3241-third convex arc segment; 3242-second straight line segment; 3243-fourth convex arc segment; 325-buckle; 326-clip; 400-tensioning gap. DETAILED DESCRIPTION

[0035] In order to make the above-mentioned objects, features and advantages of the present invention more clearly understood, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0036] This embodiment provides a return air filter structure, which is applied to an air conditioner, such as Figure 3-Figure 8As shown, the return air filtering structure includes a substrate 100 and a filter assembly 200, the substrate 100 includes an installation area 110 and a return air area 120, the return air area 120 includes a first return air port 121 and a first enclosure 122 surrounding the first return air port 121, first supporting ribs 123 are connected between the opposite frame bars of the first enclosure 122, and the outer wall surfaces of the first enclosure 122 and the first supporting ribs 123 are provided with first supporting protrusions 124; the filter assembly 200 includes a filter 210 and a first reel 220 and a second reel 230 rotatably connected to the installation area 110, the two ends of the filter 210 are wound around the first reel 220 and the second reel 230 one by one, and the mesh segment 211 of the filter 210 located between the first reel 220 and the second reel 230 completely blocks the first return air port 121 and at least partially blocks the first supporting protrusion 124.

[0037] This embodiment also provides an air conditioner, such as Figure 1 As shown, the above-mentioned return air filtering structure is adopted, and the top plate of the middle frame 10 of the air conditioner is used as the substrate 100 of the return air filtering structure.

[0038] The present embodiment provides a return air filter structure and an air conditioner, wherein in the return air filter structure, the base plate 100 is divided into an installation area 110 for installing the filter assembly 200 and a return air area 120 for enclosing a first return air port 121, and the first return air port 121 is used for gas to flow into the air duct, and the first return air port 121 is provided with a first support rib 123 for supporting it, and the first surrounding frame 122 and the first support rib 123 are provided with a first support protrusion 124 extending toward the mesh segment 211; the first reel 220 and the second reel 230 of the filter assembly 200 are installed on the outside of the installation area 110, and the mesh segment 211 between the first reel 220 and the second reel 230 is shielded from the outside of the first return air port 121, and is used to filter the airflow passing through the first return air port 121. The top plate of the middle frame 10 in the air conditioner serves as the base plate 100 of the return air filter structure, and the return air filter structure is adopted.

[0039] When the air conditioner is in use, the first reel 220 and the second reel 230 tighten the mesh segment 211 therebetween, and the mesh segment 211 blocks the outside of the first return air outlet 121. The airflow passing through the first return air outlet 121 needs to be filtered by the mesh segment 211, thereby improving the cleanliness of the airflow flowing into the air duct, reducing the blockage and pollution of various components in the air duct caused by impurities and dust entrained in the airflow, and ensuring the normal operation of the air conditioner accordingly. After being used for a period of time, when the mesh segment 211 is covered and blocked by dust, the first reel 220 and the second reel 230 can be rotated to release the clean filter 210 on one of them, and at the same time, the used filter 210 is wound around the other, and the released filter 210 is transmitted to the outside of the first return air outlet 121 to become a new mesh segment 211, so as to effectively filter the airflow passing through the first return air outlet 121 and ensure the ventilation volume of the first return air outlet 121, thereby reducing the frequency of replacement and cleaning of the filter 210 on the basis of ensuring effective filtration of the filter 210, and improving the practicality of the air conditioner; wherein, when the mesh segment 211 is not tensioned during transmission and sinks and bends toward the middle frame 10 or when the distance between its two ends and the top plate is small in the tensioned state, the first support protrusion 124 Protruding outward relative to the top plate and being in the shielding area of ​​the network segment 211, the first supporting protrusion 124 can support the network segment 211 during the transmission process. Accordingly, the network segment 211 only generates sliding friction with the first supporting protrusion 124 during the transmission process. Compared with the sliding friction between the network segment 211 and the entire outer wall surface of the first surrounding frame 122 and the first supporting rib 123 during the transmission process, the contact area between the first supporting protrusion 124 and the network segment 211 is much smaller than the first surrounding frame 122 and the first supporting rib 123. The relative operation between the two generates less dust, wear and friction on the network segment 211, thereby effectively reducing the dust, wear and friction resistance generated by the filter screen 210 during the transmission process, and correspondingly improving the transmission cleanliness, effective service life and transmission smoothness of the filter screen 210.

[0040] Optionally, in this embodiment, if Figure 5-Figure 8As shown, the first scroll 220 and the second scroll 230 are respectively located on both sides of the length direction of the first return air outlet 121, and the frame bars of the first surrounding frame 122 located on both sides of the width direction of the first return air outlet 121 are first frame bars 122a, and the first supporting ribs 123 are connected between the two first frame bars 122a; there are multiple first supporting protrusions 124 located on the outer frame surfaces of the two first frame bars 122a, and the multiple first supporting protrusions 124 located on the same first frame bar 122a are arranged at intervals along its length direction. On the one hand, the first supporting rib 123 is supported between the two first frame bars 122a in the width direction of the first return air outlet 121, and can effectively improve the strength of the first enclosure 122 with a shorter length, thereby ensuring the shape and orientation of the first return air outlet 121, and correspondingly ensuring the effective blocking and filtering of the first return air outlet 121 by the network segment 211; on the other hand, during the transmission of the network segment 211, the first supporting protrusions 124 on the top surfaces of the two first frame bars 122a can stably support the network segment 211 on both sides in the width direction, and the multiple first supporting protrusions 124 arranged at intervals along the length direction of each first frame bar 122a can fully support the entire length direction of the network segment 211, thereby achieving comprehensive and stable support for the network segment 211 with a smaller number of first supporting protrusions 124 and a smaller supporting area, thereby correspondingly ensuring the effective blocking of the first return air outlet 121 by the filter 210, and reducing the dust and wear generated during the transmission process of the network segment 211.

[0041] Of course, in other embodiments, the first supporting protrusion 124 may be provided on the outer wall surface of the first supporting rib 123 facing the filter 210 , or the first supporting protrusion 124 may be provided on the outer frame surface of the frame strips of the first surrounding frame 122 on both sides of the length direction of the first return air outlet 121 .

[0042] Specifically, in this embodiment, Figure 4As shown, among the multiple first supporting protrusions 124 located on the same first frame strip 122a, two of them serve as first end supporting protrusions 124a, and the remaining first supporting protrusions 124 serve as first middle supporting protrusions 124b. The two first end supporting protrusions 124a are located one by one at the two end positions in the length direction of the first frame strip 122a, and the first middle supporting protrusion 124b is located between the two first end supporting protrusions 124a. Two first end support protrusions 124a are arranged at the two end positions of the first frame strip 122a in the length direction. Correspondingly, the four first end support protrusions 124a of the two first frame strips 122a are located on the outside of the four corners of the first return air outlet 121. During the transmission of the network segment 211, the four first end support protrusions 124a can effectively and comprehensively support the network segment 211 on all sides, so that the network segment 211 transmitted to the corresponding first return air outlet 121 can stably maintain a certain distance from the first return air outlet 121, thereby ensuring the corresponding blocking and filtering of the first return air outlet 121 by the network segment 211, and effectively reducing the dust and wear generated during the transmission of the network segment 211; at the same time, the first middle support protrusion 124b located between the two first end support protrusions 124a can support the middle area of ​​the network segment 211, so as to reduce the occurrence of the situation where the network segment 211 is loose and still in contact and wear with the first surrounding frame 122 or the first supporting rib 123.

[0043] In this embodiment, Figure 1-Figure 4 As shown, the return air filtering structure can also include a pressure cover 300, the pressure cover 300 includes a first cover area 310 and a second cover area 320, the second cover area 320 includes a second return air outlet 321 and a second surrounding frame 322 surrounding the second return air outlet 321; the pressure cover 300 is detachably connected to the base plate 100, the first scroll 220 and the second scroll 230 are both covered in the first cover area 310, and the second return air outlet 321 corresponds to the first return air outlet 121. The second return air outlet 321 of the pressure cover 300 corresponds to the first return air outlet 121, and the external air flow can flow through the first return air outlet 121, the network segment 211 and the first return air outlet 121 in sequence and then enter the air duct, which can ensure the normal air intake of the air conditioner and the normal shielding and filtering of the first return air outlet 121 by the network segment 211; at the same time, the first cover area 310 covers the first reel 220 and the second reel 230 therein, which can reduce the dust in the external environment from settling on the filter 210 wound on the first reel 220 and the second reel 230, thereby reducing the ineffective consumption of the clean filter 210 on the reel, and correspondingly ensuring the effective filtering of the first return air outlet 121 by the clean filter 210 on the reel; in addition, it can also improve the appearance neatness of the return air filtration structure.

[0044] Optionally, in this embodiment, if Figure 4 , Fig. 9 and Fig.10As shown, second supporting ribs 323 are connected between the opposite frame bars of the second enclosure 322, and the inner frame surface of the second enclosure 322 and / or the second supporting ribs 323 is provided with second supporting protrusions 324, and the second supporting protrusions 324 are used to support the network segment 211. Firstly, the provision of the second supporting ribs 323 can play a supporting and reinforcing role for the second return air outlet 321, so as to improve the shape and orientation stability of the second return air outlet 321; secondly, the second supporting protrusions 324 are provided on the bottom surface of at least one of the second enclosure 322 and the second supporting ribs 323, and during the transmission process of the network segment 211, the second supporting protrusions 324 can support a certain gap between the network segment 211 and the second enclosure 322 and the second supporting ribs 323 with a smaller contact area, thereby effectively reducing the occurrence of large dust and wear caused by the relative friction between the network segment 211 and the entire second enclosure 322 and the second supporting ribs 323 during the transmission process.

[0045] In this embodiment, Fig. 9 and Fig.10As shown, the frame bars of the second surrounding frame 322 located on both sides of the second return air outlet 321 in the width direction are second frame bars 322a, and second supporting ribs 323 are connected between the two second frame bars 322a. The inner frame surfaces of the second frame bars 322a are provided with multiple second supporting protrusions 324, and the multiple second supporting protrusions 324 are arranged at intervals along the length direction of the second frame bars 322a. On the one hand, the second supporting rib 323 is supported between the two second frame bars 322a in the width direction of the second return air outlet 321, and can effectively improve the strength of the second enclosure 322 with a shorter length, thereby ensuring the shape and orientation of the second return air outlet 321, and correspondingly ensuring that the network segment 211 effectively blocks and filters the second return air outlet 321; on the other hand, during the transmission of the network segment 211, the second supporting protrusions 324 on the bottom surfaces of the two second frame bars 322a can stably support the network segment 211 on both sides in the width direction, and the multiple second supporting protrusions 324 arranged at intervals along the length direction of each second frame bar 322a can fully support the entire length direction of the network segment 211, thereby achieving comprehensive and stable support for the network segment 211 with a smaller number of second supporting protrusions 324 and a smaller supporting area, and correspondingly reducing the dust and wear generated by the transmission process of the network segment 211 and the second enclosure 322 and the second supporting ribs 323; on the other hand, the second supporting protrusions 324 are arranged on the second frame bars 3 22a, the length direction of the second frame strip 322a is consistent with the transmission direction of the network segment 211. During use, the second frame strip 322a can always completely block the area below the network segment 211, so the amount of dust deposited on the network segment 211 in this area is relatively small; accordingly, during the transmission of the network segment 211, the second supporting protrusion 324 only has relative friction with the area of ​​the network segment 211, thereby further reducing the dust generated during the transmission of the network segment 211; in addition, the two first frame strips 122a and the two second frame strips 322a correspond to each other one by one, and the first supporting protrusions 124 and the second supporting protrusions 324 arranged in a row along the length direction of the first return air outlet 121 support the network segment 211 upward and downward respectively, thereby tensioning and leveling the network segment 211, and correspondingly further ensuring the corresponding blocking and filtering of the first return air outlet 121 by the network segment 211, and reducing the dust wear caused by the contact between the network segment 211 and the first surrounding frame 122 and the first supporting ribs 123.

[0046] Optionally, in this embodiment, if Fig. 9 and Fig.10As shown, among the multiple second supporting protrusions 324 located on the same second frame strip 322a, two of them serve as second end supporting protrusions 324a, and the remaining second supporting protrusions 324 serve as second middle supporting protrusions 324b. The two second end supporting protrusions 324a are located one by one at the two end positions in the length direction of the second frame strip 322a, and the second middle supporting protrusion 324b is located between the two second end supporting protrusions 324a. Two second end support protrusions 324a are arranged at the two end positions of the second frame strip 322a in the length direction. Correspondingly, the four second end support protrusions 324a of the two second frame strips 322a are located on the outside of the four corners of the second enclosure 322. During the transmission of the network segment 211, the four second end support protrusions 324a can effectively and comprehensively support the network segment 211 on all sides, so that the network segment 211 transmitted to the corresponding second return air outlet 321 can stably maintain a certain distance from the second enclosure 322 and the second support ribs 323, thereby effectively reducing the dust and wear generated during the transmission of the network segment 211; at the same time, the second middle support protrusion 324b located between the two second end support protrusions 324a can support the middle area of ​​the network segment 211, so as to cooperate with the multiple first end support protrusions 124a to tighten and level the middle area of ​​the network segment 211, thereby reducing the occurrence of loosening of the network segment 211 and contact and wear with the first enclosure 122 or the first support ribs 123.

[0047] Specifically, in this embodiment, Figure 2 and Figure 3 As shown, the sum of the length of the second supporting protrusion 324 and the length of the corresponding first supporting protrusion 124 is not less than the spacing between the second enclosure frame 322 and the first enclosure frame 122, and a plurality of first supporting protrusions 124 and a plurality of second supporting protrusions 324 correspond one to one to form a tensioning group, and the second supporting protrusions 324 and the first supporting protrusions 124 of the same tensioning group are staggered along the length direction of the first return air outlet 121, and a tensioning gap 400 is left between the two for the network segment 211 to pass through. The lengths of the second support protrusions 324 are equal, the lengths of the first support protrusions 124 are equal, and the sum of the lengths of the second support protrusions 324 and the corresponding first support protrusions 124 is equal to the spacing between the second enclosure 322 and the first enclosure 122. The network segment 211 needs to bypass the top ends of the first support protrusions 124 and the bottom ends of the second support protrusions 324 of each tensioning group along its length direction, thereby tensioning the network segment 211 and correspondingly reducing the occurrence of loosening of the network segment 211 and contact with the first enclosure 122 and the first support ribs 123, causing dust and wear. At the same time, the area of ​​the network segment 211 that is different from the tensioning group can approximately form a tensioning plane under the tensioning action of the tensioning group, thereby improving the flatness of the network segment 211 and ensuring the corresponding shielding and filtration of the network segment 211 and the first return air outlet 121.

[0048] Of course, in other embodiments, the sum of the length of the second support protrusion 324 and the length of the first support protrusion 124 may also be less than the spacing between the second enclosure 322 and the first enclosure 122, and a limiting gap is left between the second support protrusion 324 and the first support protrusion 124 for the network segment 211 to pass through. During the use and transmission of the network segment 211, the first support protrusion 124 and the second support protrusion 324 can support the network segment 211 below and above the network segment 211, respectively, to ensure the spacing between the network segment 211 and the first enclosure 122 and the second enclosure 322, thereby reducing the contact dust and wear between the network segment 211 and the first enclosure 122, the second enclosure 322, the first support rib 123 and the second support rib 323 during the transmission process.

[0049] Specifically, in this embodiment, Figure 3 As shown, the first support protrusion 124 is strip-shaped and its length direction is consistent with the width direction of the first return air outlet 121, and the contour line formed by the outer convex surface of the first end support protrusion 124a in its cross section is a circular arc segment. When the height of the filter 210 winding out of the first reel 220 or the second reel 230 is lower than the first support protrusion 124, the first support protrusion 124 supports the filter 210 upward and is in tangential line contact or surface contact with the filter 210, then the outer convex surface of the first end support protrusion 124a is set to be a circular arc surface, which can ensure the smoothness of the contact surface when the filter 210 and the first support protrusion 124 are in surface contact and are in a tangential state when they are in line contact, and the filter 210 is wound out of the first reel 220 or the second reel 230. There is no requirement for the relative height between the reel 230 and the first supporting protrusion 124. Therefore, during the use of the filter 210, although the height of the filter 210 wound around the first reel 220 and the second reel 230 is constantly changing, it can be in tangential line contact or smooth arc surface contact with the first supporting protrusion 124, which correspondingly reduces the occurrence of the situation where the edges of the first supporting protrusion 124 have a large degree of wear on the filter 210 or even the possibility of scratching the filter 210 when the edges and corners of the first supporting protrusion 124 move relative to the filter 210.

[0050] Similarly, the second support protrusion 324 is strip-shaped and its length direction is consistent with the width direction of the second return air outlet 321. The contour line formed by the outer convex surface of the second end support protrusion 324a in its cross section is an arc segment. The outer convex surface of the second end support protrusion 324a is an arc surface, and its effect is similar to that of the outer convex surface of the first end support protrusion 124a being an arc surface, which will not be repeated here.

[0051] In this embodiment, Figure 3As shown, the contour line formed by the outer convex surface of the first middle supporting convexity 124b in its cross section includes a first convex arc segment 1241, a first straight line segment 1242 and a second convex arc segment 1243 which are connected in sequence with smooth transitions, and the first straight line segment 1242 is parallel to the plane where the outer port of the first return air outlet 121 is located. The top end surface of the first middle supporting protrusion 124b is a plane forming the first straight line segment 1242, and the side surfaces on both sides of the plane are two arc surfaces forming the first convex arc segment 1241 and the second convex arc segment 1243, wherein, when the first middle supporting protrusion 124b is located between the two tensioning groups, the plane at its top end can provide surface support for the corresponding area of ​​the network segment 211 with a slightly larger area, so as to improve the flatness of the area between the two tensioning groups of the network segment 211; when the first middle supporting protrusion 124b is one of the tensioning groups, the network segment 211 needs to bypass the first middle supporting protrusion 124b upwards under the action of the downward support of the second middle supporting protrusion 324b, so as to be in smooth surface contact with the first convex arc segment 1241 or the second convex arc segment 1243, thereby reducing the cutting damage to the network segment 211 caused by the convex edges of the first middle supporting protrusion 124b.

[0052] Similarly, the contour line formed by the outer convex surface of the second middle supporting protrusion 324b in its cross section includes a third convex arc segment 3241, a second straight line segment 3242 and a fourth convex arc segment 3243 which are connected in a smooth transition sequence, and the second straight line segment 3242 is parallel to the plane where the outer port of the second return air outlet 321 is located. The third convex arc segment 3241, the second straight line segment 3242 and the fourth convex arc segment 3243 of the second middle supporting protrusion 324b have similar effects to the first convex arc segment 1241, the first straight line segment 1242 and the second convex arc segment 1243 of the first middle supporting protrusion 124b, and will not be described in detail here.

[0053] In this embodiment, Figure 8 As shown, the end face of one end of the first support protrusion 124 facing the first return air outlet 121 is coplanar with the inner ring wall surface of the first enclosure 122. On the one hand, the edge of the network segment 211 extends out of the first return air outlet 121 to ensure complete shielding and filtering of the first return air outlet 121, and the end face of the first support protrusion 124 facing the first return air outlet 121 is coplanar with the inner ring wall surface of the first enclosure 122. Correspondingly, the edge of the network segment 211 extends beyond the end face of the first support protrusion 124 facing the first return air outlet 121, and each first support protrusion 124 can effectively support the edge area of ​​the network segment 211, thereby ensuring the support effectiveness of the first support protrusion 124; on the other hand, the end face of one end of the first support protrusion 124 is coplanar with the inner ring wall surface of the first enclosure 122, which can also improve the overall neatness of the two.

[0054] Similarly, if Fig.10As shown, the end surface of the second support protrusion 324 facing the second return air outlet 321 is coplanar with the inner ring wall surface of the second enclosure 322 to ensure that the second support protrusion 324 effectively supports the edge area of ​​the network segment 211 and improves the overall neatness of the second support protrusion 324 and the second enclosure 322.

[0055] In this embodiment, Figure 8 As shown, the first surrounding frame 122 and the first supporting rib 123 form a first supporting frame, and the outer frame surface of the first supporting frame is provided with an ash containing groove 124c which is consistent with the extension direction of the first supporting rib 123, and the ash containing groove 124c includes a middle ash containing section 1244 located at the first supporting rib 123 and end ash containing sections 1245 located at both ends of the middle ash containing section 1244, and along the axial direction of the first reel 220, the ash containing groove 124c completely covers the area where the mesh segment 211 is located. The length direction of the first supporting rib 123 is approximately perpendicular to the conveying direction of the network segment 211, and an ash receiving groove 124c extending along its length direction is arranged on the top surface of the first supporting rib 123, and the length of the ash receiving groove 124c extends to the first enclosure 122 to completely cover the area where the network segment 211 is located. During the conveying process of the network segment 211, dust falling from the edge of the network segment 211 to the first enclosure 122 and dust scraped off by the first supporting protrusion 124 and the second supporting protrusion 324 can enter the ash receiving groove 124c, thereby reducing the occurrence of dust falling on the first enclosure 122 and the top surface of the first supporting rib 123 being blown into the air duct, and correspondingly further ensuring the normal operation of the air duct components in the air duct.

[0056] Optionally, in this embodiment, as 7 and Figure 8 As shown, a slot 125 is provided at the first side edge of the first return air outlet 121, and a card hole 126 is provided at the frame strip corresponding to the second side edge of the first surrounding frame 122 and the first return air outlet 121; Fig. 9 and Fig.10 As shown, the two opposite ends of the pressure cover 300 are respectively provided with a buckle 325 and a buckle 326, the buckle 325 is inserted into the slot 125, and the buckle 326 is engaged with the clamping hole 126. This is one of the specific connection methods of the pressure cover 300 and the substrate 100. When installing the pressure cover 300, the buckle 325 can be aligned and inserted into the slot 125 of the first frame 122 to realize the position of the pressure cover 300 connected to the substrate 100; then the pressure cover 300 is rotated toward the top plate with the buckle 325 as a fulcrum until the buckle 326 is connected to the clamping hole 126, thereby completing the convenient and detachable connection between the pressure cover 300 and the top plate. When the pressure cover 300 needs to be disassembled to clean or replace the filter 210, the connection between the buckle 326 and the clamping hole 126 can be disassembled, and then the buckle 325 can be pulled out from the slot 125.

[0057] Finally, it should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0058] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A return air filter structure, applied to an air conditioner, characterized in that: The return air filtering structure comprises a substrate (100) and a filter assembly (200); the substrate (100) comprises an installation area (110) and a return air area (120); the return air area (120) comprises a first return air port (121) and a first enclosure (122) arranged around the first return air port (121); first supporting ribs (123) are connected between opposite frame bars of the first enclosure (122); and a first supporting protrusion (124) is provided on an outer wall surface of the first enclosure (122) and / or the first supporting rib (123); The filter assembly (200) comprises a filter (210) and a first reel (220) and a second reel (230) rotatably connected to the installation area (110); two ends of the filter (210) are wound around the first reel (220) and the second reel (230) in a one-to-one correspondence; a mesh section (211) of the filter (210) located between the first reel (220) and the second reel (230) completely blocks the first return air outlet (121) and at least partially blocks the first supporting protrusion (124).

2. The return air filtering structure according to claim 1, characterized in that: The first reel (220) and the second reel (230) are respectively located on both sides of the length direction of the first return air outlet (121); the frame bars of the first enclosure (122) located on both sides of the width direction of the first return air outlet (121) are first frame bars (122a); the first supporting ribs (123) are connected between the two first frame bars (122a); the first supporting protrusions (124) located on the outer frame surfaces of the two first frame bars (122a) are multiple, and the multiple first supporting protrusions (124) located on the same first frame bar (122a) are arranged at intervals along its length direction.

3. The return air filtering structure according to claim 2, characterized in that: Among the multiple first supporting protrusions (124) located on the same first frame strip (122a), two of them serve as first end supporting protrusions (124a), and the remaining first supporting protrusions (124) serve as first middle supporting protrusions (124b), and the two first end supporting protrusions (124a) are located one by one at the two end positions of the first frame strip (122a) in the length direction.

4. The return air filtering structure according to claim 1, characterized in that: The return air filtering structure further comprises a pressure cover (300), wherein the pressure cover (300) comprises a first cover area (310) and a second cover area (320), wherein the second cover area (320) comprises a second return air outlet (321) and a second surrounding frame (322) surrounding the second return air outlet (321); the pressure cover (300) is detachably connected to the base plate (100), the first reel (220) and the second reel (230) are both covered in the first cover area (310), and the second return air outlet (321) corresponds to the first return air outlet (121).

5. The return air filtering structure according to claim 4, characterized in that: Second supporting ribs (323) are connected between the opposite frame bars of the second surrounding frame (322), and the inner wall surface of the second surrounding frame (322) and / or the second supporting ribs (323) is provided with second supporting protrusions (324).

6. The return air filtering structure according to claim 3, characterized in that: The return air filtering structure further comprises a pressure cover (300), wherein the pressure cover (300) comprises a first cover area (310) and a second cover area (320), wherein the second cover area (320) comprises a second return air port (321) and a second surrounding frame (322) surrounding the second return air port (321); the pressure cover (300) is detachably connected to the base plate (100), the first reel (220) and the second reel (230) are both covered in the first cover area (310), and the The second return air outlet (321) corresponds to the first return air outlet (121); the frame bars of the second surrounding frame (322) located on both sides of the second return air outlet (321) in the width direction are second frame bars (322a), and second supporting ribs (323) are connected between the two second frame bars (322a); the inner frame surface of the second frame bar (322a) is provided with a plurality of second supporting protrusions (324), and the plurality of second supporting protrusions (324) are arranged at intervals along the length direction of the second frame bar (322a).

7. The return air filtering structure according to claim 6, characterized in that: Among the multiple second supporting protrusions (324) located on the same second frame strip (322a), two of them serve as second end supporting protrusions (324a), and the remaining second supporting protrusions (324) serve as second middle supporting protrusions (324b), the two second end supporting protrusions (324a) are located one by one at the two end positions of the second frame strip (322a) in the length direction, and the second middle supporting protrusion (324b) is located between the two second end supporting protrusions (324a).

8. The return air filtering structure according to claim 7, characterized in that: The sum of the length of the second supporting protrusion (324) and the length of the corresponding first supporting protrusion (124) is not less than the distance between the second surrounding frame (322) and the first surrounding frame (122); a plurality of the first supporting protrusions (124) and a plurality of the second supporting protrusions (324) correspond one to one to form a tensioning group; the second supporting protrusion (324) and the first supporting protrusion (124) of the same tensioning group are staggered along the length direction of the first return air outlet (121), and a tensioning gap (400) is left between the two for the network segment (211) to pass through.

9. The return air filtering structure according to claim 7, characterized in that: The first supporting protrusion (124) is strip-shaped and its length direction is consistent with the width direction of the first return air outlet (121); the contour line formed by the outer convex surface of the first end supporting protrusion (124a) in its cross section is a circular arc segment; and / or the contour line formed by the outer convex surface of the first middle supporting protrusion (124b) in its cross section includes a first convex arc segment (1241), a first straight line segment (1242) and a second convex arc segment (1243) which are connected in a smooth transition sequence, and the first straight line segment (1242) is parallel to the plane where the outer end of the first return air outlet (121) is located; And / or, the second supporting protrusion (324) is strip-shaped and its length direction is consistent with the width direction of the second return air outlet (321), and the contour line formed by the outer convex surface of the second end supporting protrusion (324a) in its cross section is a circular arc segment; and / or, the contour line formed by the outer convex surface of the second middle supporting protrusion (324b) in its cross section includes a third convex arc segment (3241), a second straight line segment (3242) and a fourth convex arc segment (3243) which are connected in sequence with smooth transitions, and the second straight line segment (3242) is parallel to the plane where the outer port of the second return air outlet (321) is located.

10. The return air filtering structure according to claim 5, characterized in that: An end surface of the first supporting protrusion (124) facing the first air return port (121) is coplanar with the inner ring wall surface of the first surrounding frame (122); And / or, an end surface of the second supporting protrusion (324) facing the second air return port (321) is coplanar with the inner ring wall surface of the second surrounding frame (322).

11. The return air filtering structure according to claim 2, characterized in that: The first surrounding frame (122) and the first supporting rib (123) form a first supporting frame, and an outer frame surface of the first supporting frame is provided with an ash containing groove (124c) which is consistent with the extension direction of the first supporting rib (123), and the ash containing groove (124c) comprises a middle ash containing section (1244) located at the first supporting rib (123) and end ash containing sections (1245) located at both ends of the middle ash containing section (1244), and along the axial direction of the first reel (220), the ash containing groove (124c) completely covers the area where the network segment (211) is located.

12. The return air filtering structure according to claim 4, characterized in that: A slot (125) is provided at the first side edge of the first return air outlet (121), and a snap hole (126) is provided at the frame strip corresponding to the second side edge of the first surrounding frame (122) and the first return air outlet (121); a plug buckle (325) and a snap buckle (326) are respectively provided at the two opposite ends of the pressure cover (300), the plug buckle (325) is plugged into the slot (125), and the snap buckle (326) is snapped into the snap hole (126).

13. An air conditioner, characterized in that: The return air filter structure according to any one of claims 1 to 12 is adopted, and the top plate of the middle frame (10) of the air conditioner serves as a substrate (100) of the return air filter structure.

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