Filter system and air conditioner

Abstract

The present application discloses a filtering system and an air conditioner, and relates to the technical field of air conditioning devices. In the technical solution provided in the present application, the filter can be switched between a working position and a purging position. When the filter is in the working position, the filter can normally filter the airflow in the filter air duct. When the filter is switched from the working position to the purging position, the filter moves to the second channel section and is located between the two ends of the second channel section. Since the inner cross-sectional area of ​​the first channel section is larger than the inner cross-sectional area of ​​the second channel section, in the filter air duct, the flow rate of the airflow in the second channel section will be greater than the flow rate of the airflow in the first channel section and form a purging airflow, thereby purging and cleaning the filter. The technical solution provided in the present application mainly divides the filter air duct into a first channel section and a second channel section with different cross-sectional areas to form an effective purging airflow, realize the purging and cleaning of the filter, and the structure of the filtering system is simpler.

Description

Technical Field

[0001] The present application relates to the technical field of air conditioning devices, and more specifically, to a filtering system and an air conditioner. Background Art

[0002] Air conditioners are generally equipped with filters to filter turbid indoor air or outdoor fresh air. In related technical solutions, some filter systems are disclosed that clean the filter by blowing through the filter. However, in these technical solutions, in addition to the air conditioner's own fan, an additional fan is required to provide a purge airflow. This results in a complex structure of the filter system. Summary of the invention

[0003] In view of this, the present application aims to provide a filtering system and an air conditioner, which have a simpler structure.

[0004] In a first aspect, the present application provides a filtering system, comprising:

[0005] The filter air duct is formed with a first channel section and a second channel section which are connected in sequence, and the inner cross-sectional area of ​​the first channel section is larger than the inner cross-sectional area of ​​the second channel section;

[0006] A filter screen is arranged in the filtering air duct and can be switched between a working position and a purge position;

[0007] When the filter screen is in the working position, the filter screen is located between the two ends of the first channel section; when the filter screen is in the purge position, the filter screen is located between the two ends of the second channel section.

[0008] Optionally, in some embodiments of the present application, the filtration system includes:

[0009] an outdoor air outlet, connected to an end of the first channel section away from the second channel section;

[0010] a first indoor air outlet, connected to an end of the second channel section away from the first channel section;

[0011] The filtering system has an air intake state in which the airflow flows from the outdoor air outlet to the filtering air duct, and an air discharge state in which the airflow flows from the filtering air duct to the outdoor air outlet.

[0012] Optionally, in some embodiments of the present application, the filter air duct includes:

[0013] a third channel section, one end of which is connected to an end of the first channel section away from the outdoor air outlet;

[0014] The filtration system comprises:

[0015] a second indoor air outlet, connected to the other end of the third channel section;

[0016] The valve assembly is used to control the opening and closing of the first indoor air outlet and the opening and closing of the second indoor air outlet.

[0017] Optionally, in some embodiments of the present application, the filtration system includes:

[0018] a third indoor air outlet, connected to an end of the first channel section away from the second channel section;

[0019] Wherein, the valve assembly is also used to control the opening and closing of the third indoor air outlet, and to control the opening and closing of the outdoor air outlet.

[0020] Optionally, in some embodiments of the present application, the filter air duct includes:

[0021] The fan housing has a first port and a second port, the first port is connected to an end of the first channel section away from the outdoor air outlet, and the second port is respectively connected to an end of the second channel section away from the first indoor air outlet and an end of the third channel section away from the second indoor air outlet;

[0022] An impeller is rotatably disposed in the fan housing, and the impeller is configured to: when rotating along a first rotation direction, the airflow flows from the first port to the second port; when rotating along a second rotation direction, the airflow flows from the second port to the first port, and the first rotation direction and the second rotation direction are opposite.

[0023] Optionally, in some embodiments of the present application, the filter in the purge position can be switched between an unfolded state and a folded state;

[0024] In the expanded state, the two ends of the second channel section are separated by the filter;

[0025] In the folded state, a gap is formed between the filter screen and the inner wall of the second channel section, which is connected to both ends of the second channel section respectively.

[0026] Optionally, in some embodiments of the present application, the filter includes a first part and a second part that are rotatably connected, and when the filter is switched from the unfolded state to the folded state, the second part rotates relative to the first part to separate from the inner wall of the second channel section, thereby forming the gap.

[0027] Optionally, in some embodiments of the present application, the filter air duct is formed with a slide groove, and the filter screen is slidably matched with the slide groove, so that the filter screen can be switched between the working position and the purge position.

[0028] Optionally, in some embodiments of the present application, when the filter is in the working position, the filter is inside the inner wall of the first channel segment, and when the filter is in the purge position, the filter portion extends beyond the inner wall of the second channel segment.

[0029] In a second aspect, the present application provides an air conditioner, comprising:

[0030] main body;

[0031] As described in the first aspect, the filtration system is arranged on the main body.

[0032] In the technical solution provided in the present application, the filter can be switched between the working position and the purge position. When the filter is in the working position, the filter can normally filter the airflow in the filter duct. When the filter is switched from the working position to the purge position, the filter moves to the second channel section and is located between the two ends of the second channel section. Since the inner cross-sectional area of ​​the first channel section is larger than the inner cross-sectional area of ​​the second channel section, in the filter duct, the flow rate of the airflow in the second channel section will be greater than the flow rate of the airflow in the first channel section and form a purge airflow, thereby purging and cleaning the filter. The technical solution provided in the present application mainly divides the filter duct into a first channel section and a second channel section with different cross-sectional areas to form an effective purge airflow, thereby achieving the purging and cleaning of the filter, and the structure of the filtration system is simpler. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. The drawings described below are only regional embodiments of the present application. For ordinary technicians in this field, other drawings can also be obtained based on these drawings without creative work.

[0034] Figure 1 This is a structural schematic diagram of a filtration system in one embodiment of the present application;

[0035] Figure 2 In one embodiment of the present application, the filtering system is Figure 1 The cross-sectional diagram at AA in the middle shows that the filtration system is in external circulation mode;

[0036] Figure 3 In one embodiment of the present application, the filtering system is Figure 1 A schematic cross-sectional view at AA in the middle shows the filtration system in purge mode;

[0037] Figure 4 In one embodiment of the present application, the filtering system is Figure 1The cross-sectional diagram at AA in the middle shows that the filtration system is in the first exhaust mode;

[0038] Figure 5 In one embodiment of the present application, the filtering system is Figure 1 The cross-sectional diagram at AA in the middle shows that the filtration system is in the internal circulation mode;

[0039] Figure 6 In one embodiment of the present application, the filtering system is Figure 1 The cross-sectional diagram at AA in the middle shows that the filtration system is in an internal and external dual circulation mode;

[0040] Figure 7 and Figure 8 In one embodiment of the present application, the filtering system is Figure 1 Schematic cross-sectional view at AA in the figure, in which the filter system is in the second exhaust mode.

[0041] Explanation of the reference numerals: 1000 - filtration system, 1110 - first channel section, 1120 - second channel section, 1121 - gap, 1130 - third channel section, 1140 - fan housing, 1141 - first port, 1142 - second port, 1150 - impeller, 1200 - filter, 1210 - first part, 1220 - second part, 1300 - outdoor air outlet, 1400 - first indoor air outlet, 1500 - second indoor air outlet, 1600 - third indoor air outlet, 1710 - first valve component, 1720 - second valve component, 1730 - third valve component, 1740 - fourth valve component. DETAILED DESCRIPTION

[0042] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0043] In the description of the present application, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0044] In the description of this application, "several" means more than one, "more" means more than two, "greater than", "less than", "exceed", etc. are understood to exclude the number itself, and "above", "below", "within", etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0045] In the description of this application, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in this application based on the specific content of the technical solution.

[0046] In the description of the present application, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0047] An embodiment of the present application provides an air conditioner, including a main body and a fresh air module connected to the main body, wherein the fresh air module includes a filtering system 1000 for filtering indoor air or outdoor fresh air.

[0048] See also Figure 1 , Figure 2 and Figure 3 , a schematic diagram of the structure of the filtration system 1000 provided in this embodiment and a schematic diagram of the cross section of the filtration system 1000. It can be known that in this embodiment, the filtration system 1000 includes:

[0049] The filter air duct is formed with a first channel section 1110 and a second channel section 1120 which are connected in sequence, and the inner cross-sectional area of ​​the first channel section 1110 is larger than the inner cross-sectional area of ​​the second channel section 1120;

[0050] The filter 1200 is arranged in the filter air duct and can be switched between a working position and a purge position;

[0051] When the filter screen 1200 is in the working position, the filter screen 1200 is located between the two ends of the first channel section 1110 . When the filter screen 1200 is in the purge position, the filter screen 1200 is located between the two ends of the second channel section 1120 .

[0052] In the technical solution provided in the embodiment of the present application, the filter air duct is formed with a first channel section 1110 and a second channel section 1120 that are connected, and the air flow can flow between the first channel section 1110 and the second channel section 1120.

[0053] like Figure 2 , Figure 2 The dotted arrow is used to represent the flow path of the airflow. At this time, the filter screen 1200 is in the working position. It can be known that when the filter screen 1200 is in the working position, the filter screen 1200 filters the airflow passing through the first channel section 1110, so that the filter system 1000 realizes its own filtering function.

[0054] like Figure 3 , Figure 3 The dotted arrow is used to represent the flow path of the airflow. At this time, the filter 1200 is in the purge position. When the filter 1200 is switched from the working position to the purge position, the filter 1200 will move to the second channel section 1120. At this time, since the inner cross-sectional area of ​​the first channel section 1110 is larger than the inner cross-sectional area of ​​the second channel section 1120, in the filter air duct, the flow rate of the airflow in the second channel section 1120 will be greater than the flow rate of the airflow in the first channel section 1110 and form a purge airflow, thereby purging and cleaning the filter 1200.

[0055] The technical solution provided in the present application mainly divides the filter air duct into a first channel section 1110 and a second channel section 1120 with different inner cross-sectional areas. The existing fan in the filter system is used to form an effective purge airflow to achieve the purge and cleaning of the filter screen 1200, avoiding the need to set up an additional purge fan to provide the purge airflow, and the structure of the filter system 1000 is simpler.

[0056] It is worth mentioning that the implementer can flexibly adjust the ratio of the inner cross-sectional area of ​​the first channel section 1110 and the second channel section 1120. Ideally, the ratio of the inner cross-sectional area of ​​the first channel section 1110 and the second channel section 1120 is 3:1 to 2:1. For example, 2.5:1. In this way, the flow velocity in the first channel section 1110 and the second channel section 1120 can be greatly different, thereby forming a purge airflow with an ideal strength.

[0057] Among them, the filter 1200 can be an activated carbon filter or a HEPA filter. In this embodiment, the filter 1200 is slidably connected to the sliding notch formed in the filter air duct, so that the filter 1200 can be switched between the working position and the purging position by linear movement. It can be understood that when the filter 1200 is in the working position, the part of the filter 1200 covering the inner cross-section of the first channel section 1110 can be regarded as the working part, and the airflow is filtered by the working part. When the filter 1200 is in the purging position, the part of the filter 1200 covering the inner cross-section of the second channel section 1120 can be regarded as the purging part, and the purging part is purged and cleaned. When the inner cross-sectional area of ​​the first channel section 1110 and the second channel section 1120 is larger than the filter 1200, the contours of the working part and the purging part can be consistent.

[0058] However, for the filter 1200, the dust accumulation rate in some areas is significantly higher than that in other areas. For example, when the air outlet is directly opposite to the center of the filter 1200, the dust accumulation rate in the center of the filter 1200 is higher than that at the edge of the filter 1200. Generally, only a local area of ​​the filter 1200 needs to be cleaned.

[0059] Correspondingly, in this embodiment, if Figure 2 When the filter screen 1200 is in the working position, the filter screen 1200 is inside the inner wall of the first channel section 1110; and when the filter screen 1200 is in the cleaning position, Figure 3 , the filter screen 1200 partially extends beyond the inner wall of the second channel section 1120. When in the purge position, only a part of the filter screen 1200 is passed through by the purge airflow. That is, the contour of the purge part of the filter screen 1200 is within the contour of the working part, so that the local area of ​​the filter screen 1200 is targetedly purged by the airflow, improving the cleaning effect of the local area of ​​the filter screen 1200.

[0060] Regarding the flow direction of the first channel section 1110 and the second channel section 1120, the airflow can flow from the first channel section 1110 to the second channel section 1120, or from the second channel section 1120 to the first channel section 1110. Under the premise of not affecting the implementation purpose, the implementers can make specific selections according to their own needs.

[0061] In this embodiment, the filter system 1000 includes an outdoor air outlet 1300, which is connected to one end of the first channel section 1110 away from the second channel section 1120; the filter system 1000 also includes a first indoor air outlet 1400, which is connected to one end of the second channel section 1120 away from the first channel section 1110; at the same time, the filter system 1000 has an air inlet state in which the airflow flows from the outdoor air outlet 1300 to the filter air duct, and the filter system 1000 has an air outlet state in which the airflow flows from the filter air duct to the outdoor air outlet 1300. Here, the outdoor air outlet 1300 refers to an air outlet for direct or indirect communication with the outdoor environment, and correspondingly, the first indoor air outlet 1400 refers to an air outlet for direct or indirect communication with the indoor environment.

[0062] See also Figure 2 When the filter system 1000 works normally, the filter screen 1200 is in the working position and the filter system 1000 is in the air intake state. At this time, the outdoor fresh air flows from the outdoor environment to the indoor environment through the outdoor air outlet 1300, the first channel section 1110, the second channel section 1120 and the first indoor air outlet 1400 in sequence, and in this process, the fresh air flow is normally filtered by the filter screen 1200, and the air quality of the fresh air is improved.

[0063] See also Figure 3 When the filter system 1000 needs to clean the filter 1200, the filter 1200 can be switched to the purge position, and the filter air duct can be switched to the air outlet state. At this time, the filter system 1000 can not only extract the turbid gas in the indoor environment, but also use these gases to purge and disturb the filter 1200 to achieve the purpose of cleaning the filter 1200. It can be understood that at this time, the airflow in the filter system 1000 flows toward the outdoor environment along the direction of the first indoor air outlet 1400, the second channel section 1120, the first channel section 1110 to the outdoor air outlet 1300. Therefore, the dust separated from the filter 1200 by the airflow disturbance can be discharged to the outdoor environment together with the airflow, and will not remain indoors, thereby improving the user experience.

[0064] Among them, the above-mentioned filter air duct can be composed of only the first channel section 1110 and the second channel section 1120. However, for the filter 1200, it does not need to be cleaned all the time. The cleaning frequency of the filter 1200 is not high. In some cases, it is only necessary to extract the turbid gas in the room out of the indoor environment, and there is no need to purge the filter 1200. At the same time, in some cases, the outdoor air flow is relatively clean and does not need to be filtered using the filter 1200. If the filter air duct is composed of only the first channel section 1110 and the second channel section 1120, the filter 1200 will always be on the flow path of the air flow, which will increase the wind resistance in the filter air duct, affect the air volume of the filter air duct, and cause inconvenience to the user.

[0065] Therefore, in this embodiment, if Figure 2 The filter air duct includes a third channel section 1130, one end of which is connected to the end of the first channel section 1110 away from the outdoor air outlet 1300; and the filter system 1000 includes a second indoor air outlet 1500, which is connected to the other end of the third channel section 1130. At the same time, the filter system 1000 also includes a second indoor air outlet 1500, which is connected to the other end of the third channel section 1130; the filter system 1000 also includes a valve assembly for controlling the opening and closing of the first indoor air outlet 1400, and controlling the opening and closing of the second indoor air outlet 1500. Here, the second indoor air outlet 1500 refers to an air outlet that is indirectly or directly connected to the indoor environment.

[0066] As described above, when the outdoor airflow is relatively clean and does not need to be filtered by the filter 1200, the filter system 1000 can switch the air intake state and open the second indoor air outlet 1500 and close the first indoor air outlet 1400 through the valve assembly. The filter 1200 is in the purge position to avoid airflow. At this time, the outdoor airflow will not pass through the filter 1200. The outdoor airflow will pass through the outdoor air outlet 1300, the first channel section 1110, and the second channel section 1120 in sequence and be discharged at the second indoor air outlet 1500.

[0067] At the same time, when it is only necessary to extract the turbid gas in the room, and it is not necessary to purge the filter 1200. Figure 4 , the filtration system can be switched to the air outlet state, and the second indoor air outlet 1500 is opened and the first indoor air outlet 1400 is closed through the valve assembly. The filter 1200 is in the purge position to avoid airflow. At this time, the turbid gas in the room will be directly discharged from the outdoor air outlet 1300 and will not pass through the filter 1200, avoiding useless filtering by the filter 1200 and reducing the wind resistance in the filter air duct.

[0068] More specifically, in order to realize the switching of the filtration system between the air inlet state and the air outlet state, in this embodiment, the filtration air duct includes:

[0069] The fan housing 1140 has a first port 1141 and a second port 1142. The first port 1141 is connected to an end of the first channel section 1110 away from the outdoor air outlet 1300, and the second port 1142 is respectively connected to an end of the second channel section 1120 away from the first indoor air outlet 1400 and an end of the third channel section 1130 away from the second indoor air outlet 1500;

[0070] The impeller 1150 is rotatably disposed in the fan housing 1140. The impeller 1150 is configured to: when rotating along a first rotation direction, the airflow flows from the first port 1141 to the second port 1142; when rotating along a second rotation direction, the airflow flows from the second port 1142 to the first port 1141. The first rotation direction and the second rotation direction are opposite.

[0071] The impeller 1150 can adjust the direction of the airflow by rotating forward and reversely, so that the airflow flows forward from the first port 1141 to the second port 1142, thereby putting the filter system in an air intake state, or flows reversely from the second port 1142 to the first port 1141, thereby putting the filter system in an air outlet state. It is understandable that the impeller 1150 should be an impeller structure that can drive the airflow to flow in opposite directions by rotating forward and reversely, such as an axial flow impeller.

[0072] It is worth mentioning that, in the present embodiment, the filtration system 1000 also includes a third indoor air outlet 1600, which is connected to one end of the first channel section 1110 away from the second channel section 1120. At the same time, the valve assembly in the filtration system 1000 is also used to control the opening and closing of the third indoor air outlet 1600, as well as the opening and closing of the outdoor air outlet 1300, in the hope that the filtration system 1000 can switch between more mode states.

[0073] Further, in the present embodiment, the valve assembly specifically includes a first valve component 1710, which is disposed at the first indoor air outlet 1400 and is used to control the opening and closing of the first indoor air outlet 1400. The valve assembly also includes a second valve component 1720, which is disposed at the second indoor air outlet 1500 and is used to control the opening and closing of the second indoor air outlet 1500. The valve assembly also includes a third valve component 1730, which is disposed at the outdoor air outlet 1300 and is used to control the opening and closing of the outdoor air outlet 1300. The valve assembly also includes a fourth valve component 1740, which is disposed at the third indoor air outlet 1600 and is used to control the opening and closing of the third indoor air outlet 1600. In the prior art, some air valve structures have been disclosed for realizing the opening and closing of air outlets, so the present embodiment will not describe the specific structures of the valve components.

[0074] Based on the above structure, the filtration system 1000 provided in this embodiment can switch between multiple modes. Each mode of the filtration system 1000 will be described in detail below.

[0075] The filtration system 1000 has an external circulation mode. Figure 2 , the fourth valve component 1740 closes the third indoor air outlet 1600, and the third valve component 1730 opens the outdoor air outlet 1300, the first valve component 1710 opens the first indoor air outlet 1400 and / or the second valve component 1720 opens the second indoor air outlet 1500, and the impeller 1150 rotates along the first rotation direction. At this time, the filter 1200 is in the working position. The fresh air in the outdoor environment enters the filter air duct through the outdoor air outlet 1300, and is filtered by the filter 1200 and discharged from the first indoor air outlet 1400 and / or the second indoor air outlet 1500. In this mode, the filter air duct can introduce fresh air, which is suitable for the situation where the carbon dioxide concentration in the indoor environment is too high.

[0076] The filter system 1000 has a purge mode. Figure 3 , the fourth valve component 1740 closes the third indoor air outlet 1600, and the third valve component 1730 opens the outdoor air outlet 1300, the first valve component 1710 opens the first indoor air outlet 1400, the second valve component 1720 closes the second indoor air outlet 1500, and the impeller 1150 rotates along the second rotation direction. At this time, the filter 1200 is in the purge position. The turbid air in the indoor environment enters the filter air duct through the first indoor air outlet 1400, and after the filter 1200 is purged and cleaned, it is discharged to the outdoor environment at the outdoor air outlet 1300. This mode can purge and clean the filter 1200.

[0077] The filter system 1000 has a first exhaust mode. Figure 4 , Figure 4 The dotted arrows are used to represent the flow path of the airflow. At this time, the fourth valve component 1740 closes the third indoor air outlet 1600, and the third valve component 1730 opens the outdoor air outlet 1300, the first valve component 1710 closes the first indoor air outlet 1400, the second valve component 1720 opens the second indoor air outlet 1500, and the impeller 1150 rotates along the second rotation direction. At this time, the filter 1200 is in the purge position. The turbid air in the indoor environment enters the filter air duct through the second indoor air outlet 1500, and is directly discharged from the outdoor air outlet 1300 to the outdoor environment without passing through the filter 1200. This mode can purify the indoor environment.

[0078] The filtration system 1000 has an internal circulation mode. Figure 5 , Figure 5The dotted arrows are used to represent the flow path of the airflow. At this time, the fourth valve component 1740 opens the third indoor air outlet 1600, and the third valve component 1730 closes the outdoor air outlet 1300, the first valve component 1710 opens the first indoor air outlet 1400 and / or the second valve component 1720 opens the second indoor air outlet 1500, and the impeller 1150 rotates along the first rotation direction. At this time, the filter 1200 is in the working position, and the turbid air in the indoor environment enters the filter air duct through the third indoor air outlet 1600, and is filtered by the filter 1200 and discharged from the first indoor air outlet 1400 and / or the second indoor air outlet 1500. This mode can purify the indoor environment.

[0079] The filtration system 1000 has an internal and external dual circulation mode. Figure 6 , Figure 6 The dotted arrows are used to represent the flow path of the airflow. At this time, the fourth valve component 1740 opens the third indoor air outlet 1600, and the third valve component 1730 opens the outdoor air outlet 1300, the first valve component 1710 opens the first indoor air outlet 1400 and / or the second valve component 1720 opens the second indoor air outlet 1500, and the impeller 1150 rotates along the first rotation direction. At this time, the filter 1200 is in the working position, and the outdoor fresh air enters the filter air duct through the outdoor air outlet 1300. At the same time, the turbid air in the indoor environment enters the filter air duct through the third indoor air outlet 1600. The mixed outdoor fresh air and indoor turbid air are filtered by the filter 1200 and discharged at the first indoor air outlet 1400 and / or the second indoor air outlet 1500. This mode can efficiently purify the indoor environment.

[0080] It is worth mentioning that in this embodiment, the filter 1200 has a first filter body and a second filter body arranged side by side. The first filter body is mainly an HPEA filter that can reduce the PM2.5 value in the airflow, and the second filter body is an activated carbon filter that has a deodorizing function. When the filter 1200 is in the working position, the first filter body is facing the outdoor air outlet 1300 to filter the fresh air in a targeted manner and reduce the PM2.5 value in the fresh air. The second filter body is facing the third indoor air outlet 1600 to deodorize the turbid indoor gas in a targeted manner.

[0081] Furthermore, due to the size limitation of the second indoor air outlet 1500, the volume of the indoor turbid gas delivered by the filtration system 1000 is limited when in the first exhaust mode. Therefore, in this embodiment, the filtration system 1000 also has a second exhaust mode for exhausting more air to the outdoor environment. Figure 7, the fourth valve component 1740 closes the third indoor air outlet 1600, the third valve component 1730 opens the outdoor air outlet 1300, the first valve component 1710 opens the first indoor air outlet 1400, the second valve component 1720 opens the second indoor air outlet 1500, and the impeller 1150 rotates along the second rotation direction. At this time, the filter screen 1200 is in the purge position, and the turbid air in the indoor environment enters the filter air duct through the first indoor air outlet 1400 and the second indoor air outlet 1500, and is finally discharged from the outdoor air outlet 1300 to the outdoor environment.

[0082] It is worth mentioning that in order to further increase the airflow volume of the filtration system 1000 in the second exhaust mode through the second channel section 1120, in this embodiment, the filter screen 1200 in the purge position can be switched between an unfolded state and a folded state; Figure 7 , the filter screen 1200 separates the two ends of the second channel section 1120; when in the folded state, as Figure 8 A gap 1121 is formed between the filter screen 1200 and the inner wall of the second channel section 1120 and is connected to both ends of the second channel section 1120 respectively.

[0083] When a gap 1121 is formed between the filter 1200 and the inner wall of the second channel section 1120, the airflow tends to pass through the second channel section 1120 through the gap 1121 rather than the filter 1200. The filter 1200 has a lower impact on the wind resistance of the second channel section 1120, thereby effectively increasing the airflow mass passing through the second channel section 1120 when the filter system 1000 is in the second exhaust mode, thereby improving the airflow mass discharged in the exhaust mode.

[0084] Regarding the specific structure of the filter 1200 that can switch between the folded state and the unfolded state. More specifically, in the present embodiment, the filter 1200 includes a first part 1210 and a second part 1220 that are rotatably connected. When the filter 1200 switches from the unfolded state to the folded state, the second part 1220 rotates relative to the first part 1210 to separate from the inner wall of the second channel section 1120, thereby forming a gap 1121. Of course, the implementer can also set the first part 1210 and the second part 1220 to be able to slide relative to each other, so that the filter 1200 can switch between the folded state and the unfolded state. It is worth mentioning that in the present embodiment, the first part 1210 and the second part 1220 respectively constitute the first filter body and the second filter body described in the foregoing text.

[0085] The basic concepts have been described above. Obviously, for those skilled in the art, the above detailed disclosure is only for example and does not constitute a limitation of the present application. Although not explicitly stated herein, those skilled in the art may make various modifications, improvements and amendments to the present application. Such modifications, improvements and amendments are suggested in the present application, so such modifications, improvements and amendments still belong to the spirit and scope of the exemplary embodiments of the present application.

[0086] At the same time, the present application uses specific words to describe the embodiments of the present application. For example, "one embodiment", "an embodiment", and / or "some embodiments" refer to a certain feature, structure or characteristic related to at least one embodiment of the present application. Therefore, it should be emphasized and noted that "one embodiment" or "an embodiment" or "an alternative embodiment" mentioned twice or more in different positions in this specification does not necessarily refer to the same embodiment. In addition, some features, structures or characteristics in one or more embodiments of the present application can be appropriately combined.

[0087] Similarly, it should be noted that in order to simplify the description of the disclosure of this application and thus help understand one or more embodiments of the invention, in the above description of the embodiments of this application, multiple features are sometimes combined into one embodiment, figure or description thereof. However, this disclosure method does not mean that the features required by the object of this application are more than the features mentioned in the claims. In fact, the features of the embodiments are less than all the features of the single embodiment disclosed above.

[0088] In some embodiments, numbers describing the number of components and attributes are used. It should be understood that such numbers used in the description of the embodiments are modified by the modifiers "about", "approximately" or "substantially" in some examples. Unless otherwise specified, "about", "approximately" or "substantially" indicate that the numbers are allowed to vary by ±%. Accordingly, in some embodiments, the numerical parameters used in the specification and claims are approximate values, which may change according to the required features of individual embodiments. In some embodiments, the numerical parameters should take into account the specified significant digits and adopt the general method of retaining the number of digits. Although the numerical domains and parameters used to confirm the breadth of the range in some embodiments of the present application are approximate values, in specific embodiments, the setting of such numerical values ​​is as accurate as possible within the feasible range.

[0089] Each patent, patent application, patent application publication, and other materials, such as articles, books, specifications, publications, documents, etc., cited in this application is hereby incorporated by reference in its entirety, except for application history documents that are inconsistent with or conflicting with the content of this application, and documents that limit the broadest scope of the claims of this application (currently or later attached to this application). It should be noted that if the descriptions, definitions, and / or use of terms in the attached materials of this application are inconsistent or conflicting with the content of this application, the descriptions, definitions, and / or use of terms in this application shall prevail.

Claims

1. A filtration system, characterized in that: include: The filter air duct is formed with a first channel section and a second channel section which are connected in sequence, and the inner cross-sectional area of ​​the first channel section is larger than the inner cross-sectional area of ​​the second channel section; A filter screen is arranged in the filtering air duct and can be switched between a working position and a purge position; When the filter screen is in the working position, the filter screen is located between the two ends of the first channel section; when the filter screen is in the purge position, the filter screen is located between the two ends of the second channel section; When the filter screen is in the working position, the filter screen is inside the inner wall of the first channel section; when the filter screen is in the purge position, the filter screen partially extends outside the inner wall of the second channel section.

2. The filtration system according to claim 1, characterized in that The filtration system comprises: an outdoor air outlet connected to an end of the first channel section away from the second channel section; The first indoor air outlet is connected to an end of the second channel section away from the first channel section; wherein the filtering system has an air inlet state that allows the air flow to flow from the outdoor air outlet to the filtering air duct, and an air outlet state that allows the air flow to flow from the filtering air duct to the outdoor air outlet.

3. The filtration system according to claim 2, characterized in that: The filtering air duct comprises: a third channel section, one end of which is connected to an end of the first channel section away from the outdoor air outlet; the filtering system comprises: a second indoor air outlet, connected to the other end of the third channel section; The valve assembly is used to control the opening and closing of the first indoor air outlet and the opening and closing of the second indoor air outlet.

4. The filtration system according to claim 3, characterized in that: The filtration system includes: a third indoor air outlet connected to an end of the first channel section away from the second channel section; wherein the valve assembly is also used to control the opening and closing of the third indoor air outlet, and control the opening and closing of the outdoor air outlet.

5. The filtration system according to claim 3, characterized in that: The filtering air duct comprises: a fan housing having a first port and a second port, the first port being connected to an end of the first channel section away from the outdoor air outlet, the second port being connected to an end of the second channel section away from the first indoor air outlet, and an end of the third channel section away from the second indoor air outlet; An impeller is rotatably disposed in the fan housing, and the impeller is configured to: when rotating along a first rotation direction, the airflow flows from the first port to the second port; when rotating along a second rotation direction, the airflow flows from the second port to the first port, and the first rotation direction and the second rotation direction are opposite.

6. The filtration system according to any one of claims 1 to 5, characterized in that: The filter in the purge position can be switched between an unfolded state and a folded state; In the expanded state, the two ends of the second channel section are separated by the filter; In the folded state, a gap is formed between the filter screen and the inner wall of the second channel section, which is connected to both ends of the second channel section respectively.

7. The filtration system according to claim 6, characterized in that The filter screen includes a first part and a second part which are rotatably connected. When the filter screen switches from the unfolded state to the folded state, the second part rotates relative to the first part to separate from the inner wall of the second channel section, thereby forming the gap.

8. The filtration system according to claim 1, characterized in that: The filter air duct is formed with a slide groove, and the filter screen is slidably matched with the slide groove, so that the filter screen can be switched between the working position and the purge position.

9. An air conditioner, characterized in that: include: main body; The filtration system according to any one of claims 1 to 8, wherein the filtration system is arranged on the main body.

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