Fresh air device and air conditioner indoor unit

Abstract

The present invention discloses a fresh air device and an air conditioner indoor unit. The fresh air device includes a fresh air housing and a filter assembly. The fresh air housing is provided with a fresh air duct and an installation opening communicating with the fresh air duct; the filter assembly is arranged in the fresh air duct, and the filter assembly includes a plurality of filter units. In the present invention, a plurality of filter units are sequentially inserted into the fresh air duct through the installation opening of the fresh air housing, so that the plurality of filter units are sequentially arranged along the extension direction of the installation opening to form a filter assembly, thereby filtering the air flow in the fresh air duct. Therefore, the size of the installation opening only needs to meet the requirements for the individual insertion of each filter unit. Compared with an integral filter, the size of the installation opening can be effectively reduced, and the structural strength of the fresh air housing can be improved; moreover, when the size of the installation opening is the same, the filtering area of the filter assembly is increased, the air inlet resistance of the fresh air duct is reduced, and the air inlet volume of the fresh air duct is increased.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning equipment, and particularly relates to a fresh air device and an indoor air conditioner. Background Art

[0002] In the related art, the fresh air device of an air conditioner usually adopts an integral filter screen. In order to facilitate the disassembly and replacement of the filter screen, an installation opening larger than the filter screen needs to be opened in the fresh air device, and an opening larger than the installation opening needs to be opened in the front frame of the air conditioner. If a filter screen with a larger size is used, the sizes of the installation opening and the opening need to be increased accordingly, thus affecting the strength of the fresh air device and the front frame; if a filter screen with a smaller size is used, the air inlet resistance of the fresh air device will increase, thus affecting the fresh air volume of the air conditioner. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. For this purpose, the present invention provides a fresh air device, which can reduce the size of the filter screen installation opening and improve the structural strength of the front frame on the premise of ensuring the filter screen size.

[0004] The present invention also provides an indoor air conditioner with the above fresh air device.

[0005] The fresh air device according to the first aspect embodiment of the present invention includes: a fresh air housing, provided with a fresh air inlet, a fresh air outlet and a fresh air duct, the fresh air duct communicating the fresh air inlet and the fresh air outlet, and the fresh air housing is further provided with an installation opening communicating with the fresh air duct; a filter screen assembly, arranged in the fresh air duct, the filter screen assembly including a plurality of filter screen units, the plurality of filter screen units being inserted into the fresh air duct through the installation opening, and the plurality of filter screen units being arranged in sequence along the extension direction of the installation opening. Along the extension direction of the installation opening, the size of the filter screen assembly is larger than the size of the installation opening, and the sizes of the plurality of filter screen units are all smaller than or equal to the size of the installation opening.

[0006] The fresh air device according to the embodiment of the present invention has at least the following beneficial effects:

[0007] By providing a filter screen assembly including a plurality of filter screen units, the plurality of filter screen units are sequentially inserted into the fresh air duct through the installation opening of the fresh air housing, so that the plurality of filter screen units are arranged in sequence along the extension direction of the installation opening to form a filter screen assembly, thereby filtering the air flow in the fresh air duct. Therefore, the size of the installation opening only needs to meet the requirement of separately inserting each filter screen unit, and can effectively reduce the size of the installation opening compared with the integral filter screen, improving the structural strength of the fresh air housing; and when the size of the installation opening is the same, the filtering area of the filter screen assembly is increased, the air inlet resistance of the fresh air duct is reduced, and the air inlet volume of the fresh air duct is increased.

[0008] According to some embodiments of the present invention, there are two filter units, and the two filter units are in the shape of right trapezoids. The inclined surfaces where the hypotenuses of the two filter units are located are arranged in contact with each other.

[0009] According to some embodiments of the present invention, the included angle between the hypotenuse and the right angle side of the filter unit is θ, satisfying: 45° ≤ θ < 90°.

[0010] According to some embodiments of the present invention, the filter assembly includes a first filter unit and a second filter unit, both of which are in the shape of right trapezoids. The first filter unit is located above the second filter unit. The cross-sectional area of the first filter unit gradually increases along the direction of inserting into the installation opening, and the cross-sectional area of the second filter unit gradually decreases along the direction of inserting into the installation opening.

[0011] According to some embodiments of the present invention, the installation opening is provided at a position on the outer wall of the fresh air housing close to the second filter unit.

[0012] According to some embodiments of the present invention, the fresh air housing includes a wind guiding panel, an air inlet panel, and a wind guiding ring connected between the wind guiding panel and the air inlet panel. An air inlet cavity is formed between the air inlet panel and the wind guiding ring. The filter assembly is arranged in the air inlet cavity. One end of the wind guiding ring facing the air inlet cavity has a guiding groove, and the second filter unit is inserted into the guiding groove.

[0013] According to some embodiments of the present invention, a guiding structure is provided on the inner wall of the fresh air housing. The guiding structure extends along the sliding direction of the filter unit, and the filter unit is in sliding fit with the guiding structure.

[0014] According to some embodiments of the present invention, the guiding structure is a sliding groove, and the filter unit is inserted into the sliding groove.

[0015] According to some embodiments of the present invention, the guiding structure is a rib, and the filter unit is provided with a sliding groove that is in sliding fit with the rib.

[0016] According to some embodiments of the present invention, a limiting structure is provided on the inner wall of the fresh air housing. The limiting structure is located on the inner wall at the end of the sliding direction of the filter unit to limit the movement of the filter unit along the air flow direction of the fresh air duct.

[0017] According to some embodiments of the present invention, the limiting structure is a positioning groove, and the width of the positioning groove matches the thickness of the filter unit.

[0018] According to some embodiments of the present invention, a stop member is provided on the inner wall of the fresh air housing. The stop member cooperates with the filter unit to limit the relative movement between the filter unit and the fresh air housing.

[0019] According to some embodiments of the present invention, the filter screen unit is provided with a connecting belt for pulling the filter screen unit to move relative to the fresh air housing.

[0020] The air conditioner indoor unit according to the embodiment of the second aspect of the present invention includes the fresh air device described in the above embodiment.

[0021] The air conditioner indoor unit according to the embodiment of the present invention has at least the following beneficial effects:

[0022] By adopting the fresh air device of the embodiment of the first aspect, the fresh air device is provided with a filter screen assembly including a plurality of filter screen units. The plurality of filter screen units are sequentially inserted into the fresh air duct through the installation openings of the fresh air housing, so that the plurality of filter screen units are sequentially arranged along the extending direction of the installation openings to form a filter screen assembly, thereby filtering the air flow in the fresh air duct. Therefore, the size of the installation opening only needs to meet the requirement of separately inserting a single filter screen unit, which can effectively reduce the size of the installation opening compared with the integral filter screen, and improve the structural strength of the fresh air housing; moreover, when the size of the installation opening is the same, the filtering area of the filter screen assembly is increased, the air inlet resistance of the fresh air duct is reduced, the air inlet volume of the fresh air duct is increased, and the fresh air output volume of the air conditioner indoor unit is improved.

[0023] According to some embodiments of the present invention, the air conditioner indoor unit further includes a front panel disposed on the front side of the fresh air device. The front panel is provided with an opening, and the installation opening is exposed in the opening.

[0024] The additional aspects and advantages of the present invention will be partially given in the following description, partially become obvious from the following description, or be understood through the practice of the present invention. Description of the Drawings

[0025] The following further describes the present invention in conjunction with the drawings and embodiments, where:

[0026] Figure 1 is a schematic structural diagram of an air conditioner indoor unit according to an embodiment of the present invention;

[0027] Figure 2 is a cross-sectional view of a fresh air device according to an embodiment of the present invention;

[0028] Figure 3 is a schematic structural diagram of a fresh air device according to an embodiment of the present invention;

[0029] Figure 4 is Figure 3 a cross-sectional view of the middle section A-A;

[0030] Figure 5 is Figure 4 an enlarged view of part B;

[0031] Figure 6 Schematic installation diagram of the filter assembly of a fresh air device according to an embodiment of the present invention;

[0032] Figure 7 Explosion diagram of a fresh air device according to an embodiment of the present invention from one angle;

[0033] Figure 8 Explosion diagram of a fresh air device according to an embodiment of the present invention from another angle;

[0034] Figure 9 Variation diagram of the air intake volume of a fresh air device according to an embodiment of the present invention and the original fresh air device at different fan speeds.

[0035] Reference numerals in the drawings:

[0036] Fresh air device 1000;

[0037] Fresh air housing 100; Fresh air inlet 110; Fresh air outlet 120; Fresh air duct 130; Air inlet chamber 131; Air outlet chamber 132; Installation opening 140; Air guide panel 150; Air inlet panel 160; Air guide ring 170; Air guide hole 171; Guide groove 172; Guide structure 180; Stopper 181; Limiting structure 190;

[0038] Fan 200;

[0039] Filter assembly 300; Filter unit 310; First filter unit 311; First hypotenuse 3111; Second filter unit 312; Second hypotenuse 3121; Hypotenuse 313; Right-angled side 314;

[0040] Air conditioner indoor unit 2000; Housing 2100; Front frame 2200; Opening 2300. Detailed implementation manners

[0041] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions from beginning to end. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation to the present invention.

[0042] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by terms such as up and down, 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.

[0043] In the description of the present invention, "a plurality of" means more than two. If the first and second are described, it is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features or implicitly specifying the sequence relationship of the indicated technical features.

[0044] In the description of the present invention, unless otherwise clearly defined, terms such as "arrangement", "installation", and "connection" should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific content of the technical solution.

[0045] Referring to Figure 1 As shown, an air conditioner according to an embodiment of the present invention includes an indoor unit 2000 of the air conditioner and an outdoor unit of the air conditioner (not shown in the figure). The indoor unit 2000 of the air conditioner and the outdoor unit are connected by a refrigerant pipe. The indoor unit 2000 of the air conditioner according to the embodiment of the present invention is equipped with a fresh air device 1000. The fresh air device 1000 can be communicated with the outdoor environment through a fresh air pipe (not shown in the figure), so as to introduce outdoor air into the indoor environment, thereby ensuring the freshness of the indoor air, reducing the carbon dioxide concentration in the indoor environment, improving the comfort of the indoor environment, and enhancing the user experience.

[0046] Referring to Figure 2 As shown, a fresh air device 1000 according to an embodiment of the present invention includes a fresh air housing 100 and a fan 200. The fresh air housing 100 is provided with a fresh air inlet 110, a fresh air outlet 120, and a fresh air duct 130 connecting the fresh air inlet 110 and the fresh air outlet 120. The fresh air inlet 110 is usually connected to one end of the fresh air pipe, and the other end of the fresh air pipe is connected to the outside through a wall hole. An air inlet chamber 131 and an air outlet chamber 132 are formed in the fresh air duct 130. The air inlet chamber 131 is communicated with the fresh air inlet 110, and a filter (not shown in the figure) for filtering the air flow in the fresh air duct 130 is usually provided in the air inlet chamber 131. A fan 200 is installed in the air outlet chamber 132. The rotation of the fan 200 forms a negative pressure, thereby driving the outdoor air to sequentially pass through the fresh air pipe, the fresh air inlet 110, the air inlet chamber 131, and the air outlet chamber 132, and finally discharged into the indoor environment through the fresh air outlet 120.

[0047] Referring to Figure 3 As shown, a fresh air device 1000 according to an embodiment of the present invention further includes a filter assembly 300. It can be understood that, for the convenience of replacing the filter assembly 300, the fresh air housing 100 is further provided with an installation opening 140. The installation opening 140 is communicated with the fresh air duct 130, which is convenient for the filter assembly 300 to be disassembled and installed through the installation opening 140. The filter assembly 300 according to the embodiment of the present invention is installed in the air inlet chamber 131. Therefore, the installation opening 140 can be provided on a part of the fresh air housing 100 communicated with the air inlet chamber 131.

[0048] It can be understood that the filter screen assembly 300 is used to filter the outdoor air entering the indoor environment through the fresh air duct 130. It can be understood that there are certain impurities such as dust, dust mites, and particulate matter in the outdoor air. The filter in the filter screen assembly 300 can filter the outdoor air, and the filtered air is blown out from the fresh air outlet 120 through the blower 200, which can further improve the quality of the fresh air flow in the fresh air duct 130 and enhance the user experience. The filter can filter, remove dust, or disinfect the fresh outdoor air, thereby improving the cleanliness of the air entering the indoor environment. It can be understood that the filter can be a static purification net, a high-efficiency air filter (also known as a HEPA net, High efficiency particulate air Filter), an activated carbon filter, etc., and will not be specifically limited here. In the related art, the filter usually adopts a high-efficiency air filter, and the high-efficiency air filter adopts a mesh structure meeting the HEPA standard, with an effective removal rate of 99.7% for 0.1 micron and 0.3 micron particles. The characteristic of the HEPA net is that air can pass through, but fine particles cannot. The effective removal rate of the HEPA net for particles with a diameter of more than 0.3 microns can reach more than 99.97%, making it the most effective filtering medium for pollutants such as smoke, dust, and bacteria. The filter screen assembly 300 and the fresh air housing 100 are of a detachable structure. The filter screen assembly 300 is used as a consumable and can be replaced according to the usage environment of the air conditioner and the user's usage frequency, etc., to ensure the filtering effect on the outdoor air.

[0049] It can be understood that the installation port 140 is inclined relative to the up-down direction, so that the filter screen assembly 300 can be inclined relative to the fresh air duct 130. The inclined filter screen assembly 300 can increase its filtering area, improve the air intake efficiency and filtering efficiency of the air intake duct, and thus increase the fresh air volume.

[0050] Refer to Figure 4 and Figure 6As shown, it can be understood that the filter screen assembly 300 includes two filter screen units 310, namely a first filter screen unit 311 and a second filter screen unit 312. Filters can be respectively arranged in the filter screen units 310. The first filter screen unit 311 and the second filter screen unit 312 are independent and separable structures. The structures of the first filter screen unit 311 and the second filter screen unit 312 can be the same or different, and are not specifically limited herein. The first filter screen unit 311 and the second filter screen unit 312 can be inserted into the fresh air housing 100 through the installation opening 140 in sequence. After the first filter screen unit 311 is inserted, the second filter screen unit 312 is inserted and squeezes the first filter screen unit 311 to move away from the installation opening 140, so that the first filter screen unit 311 and the second filter screen unit 312 are in contact with each other along the extension direction of the installation opening 140. The first filter screen unit 311 and the second filter screen unit 312 form the filter screen assembly 300 to filter the air flow in the fresh air duct 130. It can be understood that after the first filter screen unit 311 is inserted, the first filter screen unit 311 can also be moved away from the installation opening 140 by manual pushing.

[0051] It can be understood that the filter screen unit 310 can also be set to three, four or more, and can be specifically designed according to the actual size and parameters of the fresh air device 1000. In addition, the filter screen unit 310 can be in the shape of a right trapezoid, a rectangle, etc. The specification sizes of the filter screen units 310 can be completely different, partially the same, or completely the same. The forms of the filters adopted by the multiple filter screen units 310 can be the same or different, and can be specifically designed according to the structural form of the fresh air duct 130.

[0052] In the fresh air device 1000 of the embodiment of the present invention, by providing the filter screen assembly 300 composed of multiple filter screen units 310, the multiple filter screen units 310 are inserted into the fresh air duct 130 through the installation opening 140 of the fresh air housing 100 in sequence, so that the multiple filter screen units 310 are arranged in sequence along the extension direction of the installation opening 140 to form the filter screen assembly 300, thereby filtering the air flow in the fresh air duct 130. Therefore, the size of the installation opening 140 only needs to meet the requirement of inserting each single filter screen unit 310, rather than the requirement of inserting the filter screen assembly 300 as a whole. Compared with the integral filter screen, the size of the installation opening 140 can be effectively reduced, and the structural strength of the fresh air housing 100 can be improved. Moreover, compared with the integral filter screen, when the size of the installation opening 140 is the same, the filter screen assembly 300 composed of multiple filter screen units 310 can effectively increase the overall filtering area of the filter screen assembly 300, reduce the air inlet resistance of the fresh air duct 130, and increase the air inlet volume of the fresh air duct 130.

[0053] Refer to Figure 9 As shown, Figure 9The figure shows the variation of the air intake of the fresh air device 1000 according to an embodiment of the present invention and the original fresh air device at different rotational speeds of the fan 200. It can be seen from the figure that at different rotational speeds of the fan 200, the air intake of the fresh air device 1000 according to the embodiment of the present invention (i.e., after improvement) is increased to a certain extent compared with that of the original fresh air device (i.e., before improvement). Therefore, the fresh air device 1000 according to the embodiment of the present invention can effectively increase the air intake of the fresh air duct 130.

[0054] Referring to Figure 4 and Figure 6 as shown, it can be understood that the first filter unit 311 has a right trapezoidal structure, and the second filter unit 312 also has a right trapezoidal structure. The structure of the first filter unit 311 can be exactly the same as that of the second filter unit 312, or some parameters can be the same. The inclined surface where the first hypotenuse 3111 of the first filter unit 311 is located is arranged in contact with the inclined surface where the second hypotenuse 3121 of the second filter unit 312 is located, and the inclined surfaces where the first hypotenuse 3111 and the second hypotenuse 3121 are located coincide, so as to increase the contact area between the first filter unit 311 and the second filter unit 312, making the connection between the first filter unit 311 and the second filter unit 312 more stable. In addition, the installation opening 140 is generally a strip-shaped structure. Adopting a right trapezoidal structure makes the sizes of the first filter unit 311 and the second filter unit 312 in the extending direction of the installation opening 140 smaller, further reducing the size of the installation opening 140 and improving the structural strength of the fresh air housing 100.

[0055] It can be understood that after the first filter unit 311 with a right trapezoidal structure is inserted into the fresh air duct 130 from the installation opening 140, the inclined surface where the first hypotenuse 3111 is located is at the end facing the installation opening 140. At this time, when the second filter unit 312 with a right trapezoidal structure is inserted into the fresh air duct 130 from the installation opening 140, the inclined surface where the second hypotenuse 3121 is located cooperates with the inclined surface where the first hypotenuse 3111 is located, so that the second filter unit 312 pushes the first filter unit 311 to move in a direction away from the installation opening 140. Finally, after the second filter unit 312 and the first filter unit 311 are installed in place, they form a stable combined structure, that is, the filter assembly 300. When the filter assembly 300 needs to be disassembled and replaced, only the second filter unit 312 and the first filter unit 311 need to be taken out from the installation opening 140 in sequence, and the operation is more convenient and the operation difficulty is small.

[0056] Referring to Figure 4 and Figure 6As shown, it can be understood that the installation opening 140 is provided at a position on the outer wall of the fresh air housing 100 close to the second filter unit 312. Therefore, when the filter assembly 300 is installed, the first filter unit 311 is first inserted into the installation opening 140, and then the second filter unit 312 is inserted into the installation opening 140 and pushes the first filter unit 311 upward; after the filter assembly 300 is installed, the first filter unit 311 is located above the second filter unit 312. When the filter assembly 300 is disassembled, the second filter unit 312 is first taken out from the installation opening 140, and the first filter unit 311 can move downward under the action of gravity, so as to facilitate the first filter unit 311 to be taken out from the installation opening 140.

[0057] In order to ensure that the first hypotenuse 3111 of the first filter unit 311 and the second hypotenuse 3121 of the second filter unit 312 can be fitted, and the second filter unit 312 can push the first filter unit 311 upward, the insertion directions of the first filter unit 311 and the second filter unit 312 from the installation opening 140 need to meet certain requirements. Specifically, after the first filter unit 311 is installed in the fresh air duct 130, the cross-sectional area of the first filter unit 311 gradually increases along the insertion direction; after the second filter unit 312 is installed in the fresh air duct 130, the cross-sectional area of the second filter unit 312 gradually decreases along the insertion direction.

[0058] It can be understood that when both filter units 310 are right trapezoidal structures, in order to further reduce the size of the installation opening 140, while ensuring that the overall filtration area of the multiple filter units 310 is certain, it is necessary to reduce the maximum cross-sectional area of the cross-section of the filter unit 310 perpendicular to the installation opening 140 (which can also be understood as the insertion direction). Therefore, referring to Figure 4 As shown, it is defined that the included angle between the hypotenuse 313 and the right-angle side 314 of the filter unit 310 is θ. By controlling the included angle θ between the hypotenuse 313 and the right-angle side 314 within the range of greater than or equal to 45° and less than 90°, the maximum cross-sectional area of the filter unit 310 can be reduced, thereby reducing the designed size of the installation opening 140 and further improving the strength of the fresh air housing 100.

[0059] Referring to Figure 7 and Figure 8 As shown, the fresh air housing 100 of the embodiment of the present invention includes a wind guiding panel 150 and an air inlet panel 160, and the wind guiding panel 150 and the air inlet panel 160 are connected by means of buckles, screws, etc. The fresh air housing 100 further includes a wind guiding ring 170, and the wind guiding ring 170 is fixedly connected between the wind guiding panel 150 and the air inlet panel 160 through structures such as a clamping position, and a wind guiding hole 171 is provided through the middle of the wind guiding ring 170. Referring to Figure 2As shown, an air inlet cavity 131 is formed between the air inlet panel 160 and the air guide ring 170, an air outlet cavity 132 is formed between the air guide panel 150 and the air guide ring 170, and an air guide hole 171 connects the air inlet cavity 131 and the air outlet cavity 132. The filter assembly 300 is disposed in the air inlet cavity 131, and the fan 200 is located in the air outlet cavity 132.

[0060] Reference Figure 6 and Figure 7 As shown, it can be understood that the fresh air housing 100 is provided with a guide structure 180, and the guide structure 180 is arranged on the inner wall of the fresh air housing 100. The guide structure 180 is extended along the sliding direction of the filter unit 310, and the filter unit 310 is slidably matched with the guide structure 180. Therefore, after the filter unit 310 is inserted into the fresh air duct 130 from the installation opening 140, it can be stably installed to the corresponding position under the guidance of the guide structure 180, so that the filter unit 310 can be smoothly and stably assembled into the filter assembly 300. Moreover, when the filter assembly 300 is disassembled, it is also convenient for the filter unit 310 to slide to the installation opening 140 through the guide structure 180, thereby realizing disassembly. For example, when the filter assembly 300 is installed, after the first filter unit 311 is inserted from the installation port 140, the first filter unit 311 can move upward to the top wall of the fresh air housing 100 through the guide structure 180; when the filter assembly 300 is disassembled, the first filter unit 311 can move downward to the installation port 140 through the guide structure 180.

[0061] It is understandable that the guide structure 180 can be set on the inner wall of the fresh air housing 100 on the side opposite to the installation opening 140, or on the inner wall of the fresh air housing 100 on the side of the installation opening 140, or on both inner walls at the same time.

[0062] Reference Figure 6 As shown, in the fresh air device 1000 of the embodiment of the present invention, the guide structure 180 is a slide groove. The width of the slide groove matches the thickness of the filter unit 310, so that the filter unit 310 is inserted into the slide groove and slides with the slide groove. In addition, the two wall surfaces of the slide groove can limit the two frame walls of the filter unit 310, thereby limiting the displacement of the filter unit 310 along the airflow direction of the fresh air duct 130, reducing the shaking of the filter assembly 300, improving the sealing effect between the filter assembly 300 and the inner wall of the fresh air housing 100, and improving the filtering effect of the airflow.

[0063] It can be understood that, as another implementation manner, the guiding structure 180 is a rib, and the rib extends along the sliding direction of the filter element 310. Correspondingly, the filter element 310 is provided with a chute, and the chute is in sliding fit with the rib, so as to realize the stable guiding of the filter element 310, and the rib can limit the filter element 310 through the cooperation with the chute, reduce the shaking of the filter assembly 300, improve the sealing effect between the filter assembly 300 and the inner wall of the fresh air housing 100, and improve the filtering effect of the air flow.

[0064] Referring to Figure 6 as shown, it can be understood that a limiting structure 190 is provided on the inner wall of the fresh air housing 100. The limiting structure 190 is located on the top wall of the fresh air housing 100, that is, at the end of the sliding direction of the filter element 310. The limiting structure 190 can be connected to the end of the guiding structure 180 or can be arranged at an interval from the guiding structure 180. The limiting structure 190 can limit the displacement of the filter element 310 along the air flow direction of the fresh air duct 130, further reduce the shaking of the filter assembly 300, improve the sealing effect between the filter assembly 300 and the inner wall of the fresh air housing 100, and improve the filtering effect of the air flow.

[0065] Referring to Figure 6 as shown, it can be understood that the limiting structure 190 is a positioning groove, and the width of the positioning groove matches the thickness of the filter element 310, which is convenient for limiting the filter element 310, and the structure of the positioning groove is simple and the limiting effect is good. The positioning groove can be a continuous strip-shaped card slot structure or a multi-segment card slot structure, which is not specifically limited here. It can be understood that the limiting structure 190 can also be other structures that can limit the movement of the filter element 310 along the air flow direction of the fresh air duct 130.

[0066] Referring to FIG. Figure 4 and Figure 5 as shown, it can be understood that the fresh air housing 100 further includes a stopper 181, and the stopper 181 is formed on the inner wall of the fresh air housing 100. The stopper 181 can be a boss protruding outward from the inner wall of the fresh air housing 100. The stopper 181 is arranged in cooperation with the filter element 310, so that an interference fit or a snap fit is formed between the filter element 310 and the inner wall of the fresh air housing 100. Therefore, the displacement of the filter element 310 relative to the fresh air housing 100 can be limited, the filter element 310 can be prevented from shaking in the fresh air housing 100, and the installation stability of the filter element 310 is improved.

[0067] Referring to Figure 5As shown, it can be understood that the stopper 181 is arranged in the chute, with a simple structure and can effectively limit the displacement of the filter screen unit 310. It can be understood that when the filter screen assembly 300 includes a first filter screen unit 311 and a second filter screen unit 312, the stopper 181 also restricts the tendency of the second filter screen unit 312 to slide downward due to gravity. Therefore, a connecting belt (not shown in the figure) is provided on the second filter screen unit 312, and the connecting belt is made of materials such as soft silk ribbons. The connecting belt can be arranged at one end of the filter screen unit 310 close to the installation opening 140, so that it is convenient for the user to pull the second filter screen unit 312 to the installation opening 140 and take it out through the connecting belt. It can be understood that a connecting belt can also be arranged on the first filter screen unit 311, so that it is convenient for the user to drive the first filter screen unit 311 to move relative to the fresh air housing 100 through the connecting belt, and the first filter screen unit 311 can be taken out from the installation opening 140, improving the convenience of disassembly and avoiding damage to the filter during disassembly.

[0068] Referring to Figure 7 and Figure 8 As shown, it can be understood that the air guide ring 170 is provided with a guide groove 172 extending in a direction perpendicular to the installation opening 140. The guide groove 172 is located at one end of the air guide ring 170 facing the air inlet chamber 131 and extends in a direction perpendicular to the installation opening 140, so as to guide the insertion stroke of the first filter screen unit 311 and the second filter screen unit 312 from the installation opening 140. And the second filter screen unit 312 is inserted into the guide groove 172, which can make the connection between the second filter screen unit 312 and the fresh air housing 100 more stable, reduce the shaking of the second filter screen unit 312, further improve the connection stability between the filter screen assembly 300 and the fresh air housing 100, improve the sealing effect between the filter screen assembly 300 and the inner wall of the fresh air housing 100, and improve the air flow filtering effect.

[0069] Referring to Figure 1 As shown, an indoor air conditioner 2000 according to an embodiment of the present invention is an indoor unit of a wall-mounted air conditioner. The indoor air conditioner 2000 according to the embodiment of the present invention includes a housing 2100 and the fresh air device 1000 of the above embodiment. The fresh air device 1000 is installed in the housing 2100 and is located at one end of the housing 2100 along the length direction, so as to be integrally installed on the wall with the housing 2100. As another implementation manner, the fresh air device 1000 can also be installed outside the housing 2100 and fixedly connected to the housing 2100, so as to be installed on the wall. As another implementation manner, the fresh air device 1000 can also be independently arranged from the housing 2100, so as to be installed separately from the housing 2100.

[0070] The indoor air conditioner 2000 according to an embodiment of the present invention adopts the fresh air device 1000 of the embodiment of the first aspect. The fresh air device 1000 is provided with a filter assembly 300 including a plurality of filter units 310. The plurality of filter units 310 are sequentially inserted into the fresh air duct 130 through the installation opening 140 of the fresh air housing 100, so that the plurality of filter units 310 are sequentially arranged along the extension direction of the installation opening 140 to form the filter assembly 300, thereby filtering the air flow in the fresh air duct 130. Therefore, the size of the installation opening 140 only needs to meet the requirement that each individual filter unit 310 can be inserted respectively. Compared with the integral filter, the size of the installation opening 140 can be effectively reduced, and the structural strength of the fresh air housing 100 can be improved.

[0071] Referring to Figure 1 As shown, for the indoor air conditioner 2000 according to an embodiment of the present invention, the fresh air device 1000 is installed inside the housing 2100, and at the rear side of the front frame 2200 of the housing 2100, that is, the front frame 2200 covers the front side of the fresh air device 1000. The front frame 2200 is provided with an opening 2300. In order to ensure the structural strength of the front frame 2200, when the size of the opening 2300 remains unchanged, the occupied area of the installation opening 140 cannot exceed the occupied area of the opening 2300, that is, the installation opening 140 needs to be entirely located within the opening 2300 and the installation opening 140 is exposed within the opening 2300 to ensure that the filter can be smoothly removed from the installation opening 140 and the opening 2300. Therefore, if the fresh air device 1000 adopts the structure of an integral filter, the total filtration area of the integral filter is relatively small.

[0072] To solve the above problems, the indoor air conditioner 2000 according to an embodiment of the present invention adopts the fresh air device 1000 of the embodiment of the first aspect. The fresh air device 1000 is provided with a filter assembly 300 including a plurality of filter units 310. The plurality of filter units 310 are sequentially inserted into the fresh air duct 130 through the installation opening 140 of the fresh air housing 100, so that the plurality of filter units 310 are sequentially arranged along the extension direction of the installation opening 140 to form the filter assembly 300, filtering the air flow in the fresh air duct 130. Therefore, the size of the installation opening 140 only needs to meet the requirement that each individual filter unit 310 can be inserted respectively, rather than the requirement that the entire filter assembly 300 can be inserted. Thus, when the size of the installation opening 140 remains unchanged, the angle of the installation opening 140 can be adjusted. Through the detachable connection structural design of the plurality of filter units 310, the disassembly and assembly operations are convenient, the total filtration area of the filter assembly 300 is increased, the air inlet resistance of the fresh air duct 130 is reduced, the air inlet volume of the fresh air duct 130 is increased, and the fresh air output volume of the indoor air conditioner 2000 is improved. Moreover, the size of the opening 2300 remains unchanged, ensuring the structural strength of the front frame 2200 and reducing the production cost of the indoor air conditioner 2000.

[0073] Referring to Figure 9As shown Figure 9 Figure 9 This is a graph showing the variation of the air intake of the fresh air device 1000 according to an embodiment of the present invention and the original fresh air device at different rotational speeds of the fan 200. As can be seen from the graph, when the size of the installation opening 140 remains unchanged, by comparing the fresh air device 1000 according to the embodiment of the present invention (i.e., after improvement) with the original fresh air device (i.e., before improvement), at different rotational speeds of the fan 200, the air intake after improvement is higher than that before improvement. Therefore, the fresh air device 1000 according to the embodiment of the present invention can effectively increase the air intake of the fresh air duct 130.

[0074] Since the air conditioner indoor unit 2000 adopts all the technical solutions of the fresh air device 1000 of the above embodiment, it has at least all the beneficial effects brought by the technical solutions of the above embodiment, which will not be elaborated here.

[0075] The embodiments of the present invention have been described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge scope of those of ordinary skill in the art.

Claims

1. A fresh air device, characterized in that, Comprising: A fresh air housing, provided with a fresh air inlet, a fresh air outlet and a fresh air duct, the fresh air duct communicating the fresh air inlet and the fresh air outlet, the fresh air housing further provided with an installation opening communicating with the fresh air duct; A filter assembly, disposed in the fresh air duct, the filter assembly including a plurality of filter units, the plurality of filter units being inserted into the fresh air duct through the installation opening, and the plurality of filter units being arranged in sequence along the extending direction of the installation opening. Along the extending direction of the installation opening, the size of the filter assembly is larger than the size of the installation opening, and the sizes of the plurality of filter units are all less than or equal to the size of the installation opening; The inner wall of the fresh air housing is provided with a guiding structure, the guiding structure extending along the sliding direction of the filter unit, and the filter unit being slidably engaged with the guiding structure; The inner wall of the fresh air housing is provided with a limiting structure, the limiting structure being located on the inner wall at the end of the sliding direction of the filter unit to limit the movement of the filter unit along the air flow direction of the fresh air duct; The filter assembly includes a first filter unit and a second filter unit both having a right trapezoidal structure, the first filter unit being located above the second filter unit, the cross-sectional area of the first filter unit gradually increasing along the direction of inserting into the installation opening, the cross-sectional area of the second filter unit gradually decreasing along the direction of inserting into the installation opening, and the inclined surfaces where the hypotenuses of the first filter unit and the second filter unit are located being mutually attached; 2. The fresh air device according to claim 1, characterized in that: The included angle between the hypotenuse and the right angle side of the filter unit is θ, satisfying: 45° ≤ θ < 90°; 3. The fresh air device according to claim 1, characterized in that: The installation opening is disposed at a position on the outer wall of the fresh air housing close to the second filter unit; 4. The fresh air device according to claim 3, characterized in that: The fresh air housing includes a wind guiding panel, an air inlet panel, and a wind guiding ring connected between the wind guiding panel and the air inlet panel. An air inlet cavity is formed between the air inlet panel and the wind guiding ring. The filter assembly is disposed in the air inlet cavity. One end of the wind guiding ring facing the air inlet cavity is provided with a guiding groove, and the second filter unit is inserted into the guiding groove; 5. The fresh air device according to claim 1, characterized in that: The guiding structure is a sliding groove, and the filter unit is inserted into the sliding groove; 6. The fresh air device according to claim 1, characterized in that: The guiding structure is a rib, and the filter unit is provided with a sliding groove slidably engaged with the rib; 7. The fresh air device according to claim 1, characterized in that: The limiting structure is a positioning groove, and the width of the positioning groove is matched with the thickness of the filter unit; 8. The fresh air device according to claim 1, characterized in that: The inner wall of the fresh air housing is provided with a stop member, and the stop member cooperates with the filter unit to limit the relative movement between the filter unit and the fresh air housing; 9. The fresh air device according to claim 8, characterized in that: The filter unit is provided with a connecting band for pulling the filter unit to move relative to the fresh air housing; 10. Air conditioner indoor unit, characterized in that: Including the fresh air device according to any one of claims 1 to 9; 11. The air conditioner indoor unit according to claim 10, characterized in that: The air conditioner indoor unit further includes a front panel, the front panel being disposed on the front side of the fresh air device, the front panel being provided with an opening, and the installation opening being exposed in the opening.

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