Fresh air system and indoor unit of air conditioner with the same

Abstract

The present invention provides a fresh air system and an indoor unit of an air conditioner having the same. The fresh air system includes: a duct assembly, the duct assembly includes a volute, the volute has a fan installation cavity, a first air duct outlet communicating with the fan installation cavity, and a duct air inlet communicating with the fan installation cavity, the first air duct outlet is used for discharging fresh air into the room, and the first air duct outlet is used for communicating with the room; a housing assembly, the housing assembly includes a first cavity portion, the first cavity portion communicates with the duct air inlet, and a first housing air inlet for communicating with the room is formed on the first cavity portion; a filtering component, the filtering component is arranged in the first cavity portion to filter the air flow entering the duct air inlet from the first cavity portion, so as to solve the problem that the quality of the fresh air introduced into the room in the prior art cannot be guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of refrigeration, and in particular, to a fresh air system and an indoor unit of an air conditioner having the same. Background Art

[0002] To ensure the refrigeration / heating effect, generally, the indoor unit of the air conditioner is placed in a sealed indoor environment. However, the long-term sealing of the indoor environment will cause the indoor environment to be relatively dirty, and users will feel uncomfortable when staying in such an environment for a long time. Therefore, current air conditioners generally add the functions of introducing fresh air and exhausting air.

[0003] However, the air quality of the outdoor air is easily affected by the external environment, and the quality of the fresh air introduced into the room cannot be guaranteed. Summary of the Invention

[0004] The main object of the present invention is to provide a fresh air system and an indoor unit of an air conditioner having the same, so as to solve the problem that the quality of the fresh air introduced into the room in the prior art cannot be guaranteed.

[0005] To achieve the above object, according to one aspect of the present invention, a fresh air system is provided, including: a duct assembly, the duct assembly includes a volute, the volute has a fan installation cavity, a first air duct outlet communicating with the fan installation cavity, and a duct air inlet communicating with the fan installation cavity, the first air duct outlet is used for discharging fresh air into the room, and the first air duct outlet is used for communicating with the room; a housing assembly, the housing assembly includes a first cavity portion, the first cavity portion is communicated with the duct air inlet, and a first housing air inlet for communicating with the room is opened on the first cavity portion; a filtering component, the filtering component is arranged in the first cavity portion to filter the air flow entering the duct air inlet from the first cavity portion.

[0006] Further, a second air duct outlet is opened on the duct assembly, and the housing assembly includes: a second cavity portion, the second cavity portion is communicated with the second air duct outlet, and an outdoor communication port is opened on the second cavity portion, and the outdoor communication port is communicated with the outdoor environment.

[0007] Further, the duct assembly includes: a volute tongue, an air guiding channel is provided between the fan installation cavity and the first air duct outlet, and an exhaust channel is provided between the fan installation cavity and the second air duct outlet; the volute tongue is movably arranged in the volute to block the air guiding channel or the exhaust channel.

[0008] Further, the volute includes a volute main body and a volute cover, the volute cover covers the opening of the volute main body, and a duct air inlet is opened on the volute cover; the fresh air system further includes a driving device, and the driving device is drivingly connected to the volute tongue to drive the volute tongue to rotate around the axis of the fan installation cavity.

[0009] Further, the volute tongue includes a volute tongue body, and a transmission tooth is provided on the volute tongue body. The transmission tooth is arranged on the side of the volute tongue body away from the blower installation cavity and on the side close to the volute housing body; the driving device includes a first motor and a gear. The gear is arranged on the output shaft of the first motor, and the gear meshes with the transmission tooth to drive the volute tongue to rotate around the axis of the blower installation cavity.

[0010] Further, the volute housing includes a volute housing body and a volute housing cover. The opening of the volute housing body faces the volute housing cover, and an air duct air inlet is provided on the volute housing cover. A guide rail portion is provided on the volute housing body; a protrusion portion is provided on the side of the volute tongue close to the volute housing body, and the protrusion portion extends along the extending direction of the volute tongue body of the volute tongue; a first limiting portion and a second limiting portion are provided on the protrusion portion; a guide rail groove is provided on the guide rail portion, the first limiting portion contacts the bottom wall of the guide rail groove, and the second limiting portion contacts the side wall of the guide rail groove.

[0011] Further, the outer shell assembly further includes: a partition board, which is arranged inside the outer shell assembly to separate the first cavity portion and the second cavity portion; a second outer shell air inlet, which is provided on the partition board to communicate the first cavity portion and the second cavity portion.

[0012] Further, the outer shell assembly further includes: a damper, which is rotatably arranged between the first outer shell air inlet and the second outer shell air inlet to shield the first outer shell air inlet or the second outer shell air inlet; a second motor and a damper bracket, the second motor is drivingly connected to the damper bracket, and the damper is installed on the damper bracket to rotate driven by the second motor; wherein, when the damper is in the first position state, the damper closes the first outer shell air inlet and opens the second outer shell air inlet; when the damper is in the second position state, the damper closes the second outer shell air inlet and opens the first outer shell air inlet.

[0013] Further, the fresh air system has a fresh air intake state, an exhaust state, and an internal circulation state; when the fresh air system is in the fresh air intake state, the volute tongue is in a position blocking the exhaust passage, and the damper is in the first position state; when the fresh air system is in the exhaust state, the volute tongue is in a position blocking the fresh air intake passage, and the damper is in the second position state; when the fresh air system is in the internal circulation state, the volute tongue is in a position blocking the exhaust passage, and the damper is in the second position state.

[0014] According to another aspect of the present invention, there is provided an indoor unit of an air conditioner, including a housing and a fresh air system arranged inside the housing, and the fresh air system is the above-mentioned fresh air system.

[0015] Applying the technical solution of the present invention, the air flow in the indoor environment enters the first cavity part through the first housing air inlet on the housing assembly, flows to the air duct air inlet after being filtered by the filtering component, then flows to the fan installation cavity, and discharges fresh air into the room through the first air duct air outlet. The fresh air system of the present invention has an internal circulation state, introducing the air in the indoor environment into the fresh air system, filtering it and then sending it back into the indoor environment, avoiding the problem that when the air quality in the outdoor environment is poor, the quality of the introduced fresh air is also poor, thus affecting the fresh air quality, and solving the problem in the prior art that the quality of the fresh air introduced into the room cannot be guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings forming a part of this application are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0017] Figure 1 shows a structural schematic diagram of an embodiment of the fresh air system according to the present invention;

[0018] Figure 2 shows a structural schematic diagram of an embodiment of the air duct assembly in the fresh air system according to the present invention;

[0019] Figure 3 shows Figure 2 an exploded view of the air duct assembly of the fresh air system in

[0020] Figure 4 shows Figure 3 a structural schematic diagram of the volute tongue in the fresh air system of

[0021] Figure 5 shows a cross-sectional view of the cooperation between the volute tongue and the volute housing body in the fresh air system according to the present invention;

[0022] Figure 6 shows Figure 5 an enlarged view of the local area A of the fresh air system in

[0023] Figure 7 shows Figure 5 an enlarged view of the local area B of the fresh air system in

[0024] Figure 8 shows a structural schematic diagram of an embodiment of the fresh air system according to the present invention in the fresh air intake state;

[0025] Figure 9 shows a structural schematic diagram of an embodiment of the fresh air system according to the present invention in the exhaust state;

[0026] Figure 10 shows Figure 2Front view of the fresh air system in

[0027] Figure 11 Exploded view showing an embodiment of the housing assembly in the fresh air system according to the present invention;

[0028] Figure 12 Showing Figure 11 Assembly drawing of the housing assembly of the fresh air system in

[0029] Figure 13 Showing Figure 11 Internal schematic view of the housing assembly of the fresh air system in from a first perspective;

[0030] Figure 14 Showing Figure 11 Internal schematic view of the housing assembly of the fresh air system in from a second perspective;

[0031] Figure 15 Showing Figure 11 Side view of the housing assembly of the fresh air system when the air damper is in the first position state in ;

[0032] Figure 16 Showing Figure 11 Side view of the housing assembly of the fresh air system when the air damper is in the second position state in ;

[0033] Figure 17 Structural schematic view showing an embodiment of the fresh air system in the fresh air intake state in the indoor unit of an air conditioner according to the present invention;

[0034] Figure 18 Structural schematic view showing an embodiment of the fresh air system in the exhaust state in the indoor unit of an air conditioner according to the present invention; and

[0035] Figure 19 Structural schematic view showing an embodiment of the fresh air system in the internal circulation state in the indoor unit of an air conditioner according to the present invention.

[0036] Among them, the above-mentioned drawings include the following reference numerals:

[0037] 10, fresh air system; 20, indoor unit of the air conditioner;

[0038] 100, air duct assembly; 110, air duct air inlet; 120, first air duct air outlet; 130, second air duct air outlet;

[0039] 141, fan installation cavity; 142, volute main body; 143, volute cover;

[0040] 150, volute tongue; 151, air guiding channel; 152, exhaust air channel; 153, volute tongue body; 154, driving gear; 155, convex part; 156, first limiting part; 157, second limiting part; 158, guide rail part; 1581, guide rail groove;

[0041] 160, air duct motor; 170, centrifugal air impeller;

[0042] 200, housing assembly;

[0043] 210, first cavity part; 211, first housing air inlet;

[0044] 220, second cavity part; 221, outdoor connection port;

[0045] 230, partition board; 231, second housing air inlet;

[0046] 240, air damper; 250, air damper bracket;

[0047] 260, second motor; 261, second output shaft; 262, first limiting shaft; 263, second limiting shaft;

[0048] 300, driving device; 310, first motor; 320, gear;

[0049] 400, filtering component; 410, first opening; 420, filtering chute;

[0050] 500, air duct assembly. Detailed implementation manners

[0051] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the drawings and in combination with the embodiments.

[0052] Please refer to Figures 1 to 19 , the fresh air system 10 includes an air duct assembly 100, a housing assembly 200, and a filtering component 400.

[0053] Figure 1 Shows a structural schematic diagram of an embodiment of the fresh air system 10 according to the present invention. Figure 2 Shows a structural schematic diagram of an embodiment of the air duct assembly 100 in the fresh air system 10 according to the present invention. Figure 3 Shows Figure 2 The exploded view of the air duct assembly of the fresh air system in. The air duct assembly 100 includes a volute. Refer to Figure 1 , Figure 2 and Figure 3 , the volute has a fan installation cavity 141, a first air duct air outlet 120, and an air duct air inlet 110.

[0054] The volute can include a duct motor 160 and a centrifugal impeller 170. The centrifugal impeller 170 is arranged around the duct motor 160 and fixedly installed in the fan installation cavity 141. When the duct motor 160 starts to work, it can drive the centrifugal impeller 170 to rotate around the axis of the centrifugal impeller 170 to introduce air flow into the fan installation cavity 141.

[0055] The first air duct outlet 120 is communicated with the fan installation cavity 141. The first air duct outlet 120 is used for discharging fresh air into the room and for communicating with the room. When the duct motor 160 starts to work, it can blow the air flow from inside the front of the fan installation towards the first air duct outlet 120, and then send the air flow into the indoor environment.

[0056] The air duct inlet 110 is communicated with the fan installation cavity 141.

[0057] Figure 10 shows Figure 2 the front view of the fresh air system in Figure 13 shows Figure 11 the internal schematic diagram of the first perspective of the housing assembly of the fresh air system in Figure 10 and Figure 13 , the housing assembly 200 includes a first cavity portion 210. The first cavity portion 210 is communicated with the air duct inlet 110, and a first housing air inlet 211 for communicating with the room is provided on the first cavity portion 210.

[0058] When the duct motor 160 starts to work, it can blow the air flow from inside the front of the fan installation towards the first air duct outlet 120, and then send the air flow into the indoor environment.

[0059] Figure 11 shows the exploded view of an embodiment of the housing assembly 200 in the fresh air system 10 according to the present invention. See Figure 11 , the filtering component 400 is arranged in the first cavity portion 210 to filter the air flow entering the air duct inlet 110 from the first cavity portion 210.

[0060] In this embodiment, the air flow in the indoor environment enters the first cavity portion 210 through the first housing air inlet 211 on the housing assembly 200, flows towards the air duct inlet 110 after being filtered by the filtering component 400, then flows towards the fan installation cavity 141, and discharges fresh air into the room through the first air duct outlet 120. The fresh air system 10 of the present invention has an internal circulation state, introducing the air in the indoor environment into the fresh air system 10, filtering it and then sending it back into the indoor environment, avoiding the problem that when the air quality in the outdoor environment is poor, the quality of the introduced fresh air is also poor, which affects the fresh air quality, and solving the problem that the quality of the fresh air introduced into the room in the prior art cannot be guaranteed.

[0061] Figure 14 shows Figure 11 an internal schematic view of a second perspective of the housing assembly of the fresh air system in Figure 14 . Referring to

[0062] , a first opening 410 communicating with the first cavity portion 210 is provided on the housing assembly 200, so that the filter member 400 is inserted into the first cavity portion 210 or withdrawn from the first cavity portion 210 through the first opening 410. The included angle between the insertion direction of the filter member 400 and the filtering direction of the filter member 400 is greater than or equal to 45° and less than or equal to 135°.

[0063] Refer to Figure 2 . A second air duct outlet 130 is provided on the air duct assembly 100. Refer to Figure 13 . The housing assembly 200 includes a second cavity portion 220. The second cavity portion 220 communicates with the second air duct outlet 130, and an outdoor communication port 221 is provided on the second cavity portion 220, and the outdoor communication port 221 communicates with the outdoor environment.

[0064] Figure 12 shows Figure 11 an assembly diagram of the housing assembly of the fresh air system in Figure 12 . The outdoor communication port 221 communicates with the outdoor environment through a duct assembly 500. One end of the duct assembly 500 communicates with the outdoor communication port 221, and the other end communicates with the outdoor environment. The fresh air introduction state and the exhaust state of the fresh air system 10 both use the same duct assembly 500.

[0065] Figure 8 shows a structural schematic diagram of an embodiment of the fresh air system 10 according to the present invention in the fresh air introduction state. Refer to Figure 8 . There is a fresh air introduction channel 151 between the fan installation cavity 141 and the first air duct outlet 120.

[0066] Figure 9 shows a structural schematic diagram of an embodiment of the fresh air system 10 according to the present invention in the exhaust state. Refer to Figure 9 . There is an exhaust channel 152 between the fan installation cavity 141 and the second air duct outlet 130.

[0067] Refer to Figure 3 . The air duct assembly 100 includes a volute tongue 150. The volute tongue 150 is movably arranged in the volute to block the fresh air introduction channel 151 or the exhaust channel 152.

[0068] Refer to Figure 3, the volute includes a volute main body 142 and a volute cover 143. The volute cover 143 covers the opening of the volute main body 142, and an air duct air inlet 110 is formed in the volute cover 143.

[0069] Participate Figure 3 , the fresh air system 10 further includes a driving device 300. The driving device 300 is drivingly connected to the volute tongue 150 to drive the volute tongue 150 to rotate around the axis of the fan installation cavity 141.

[0070] Figure 4 Shows Figure 3 A structural schematic diagram of the volute tongue 150 in the fresh air system 10. See Figure 4 , the volute tongue 150 includes a volute tongue main body 153. A transmission gear 154 is provided on the volute tongue main body 153. The transmission gear 154 is provided on the side of the volute tongue main body 153 away from the fan installation cavity 141 and on the side close to the volute main body 142.

[0071] Figure 5 A cross-sectional view showing the cooperation between the volute tongue 150 and the volute main body 142 in the fresh air system 10 according to the present invention is shown. Figure 7 Shows Figure 5 An enlarged view of the local part B of the fresh air system in Figure 5 And Figure 7 , the driving device 300 includes a first motor 310 and a gear 320. The gear 320 is provided on the output shaft of the first motor 310, and the gear 320 meshes with the transmission gear 154 to drive the volute tongue 150 to rotate around the axis of the fan installation cavity 141.

[0072] See Figure 8 , the volute includes a volute main body 142 and a volute cover 143. The opening of the volute main body 142 faces the volute cover 143. An air duct air inlet 110 is formed in the volute cover 143, and a guide rail portion 158 is provided on the volute main body 142.

[0073] In some embodiments, a guide rail portion 158 may also be provided on the volute tongue 150 cover to limit the volute tongue 150.

[0074] In some embodiments, the volute tongue main body 153 may be arc-shaped, and the driving device 300 drives the volute tongue 150 to move along the guide rail portion 158 to block the air guiding channel 151 or the exhaust air channel 152.

[0075] See Figure 4 , a convex portion 155 is provided on the side of the volute tongue 150 close to the volute main body 142. The convex portion 155 extends along the extending direction of the volute tongue main body 153 of the volute tongue 150. A first limiting portion 156 and a second limiting portion 157 are provided on the convex portion 155.

[0076] Figure 6 shows Figure 5 an enlarged view of the fresh air system in local area A in Figure 5 and Figure 6 As shown in and , a guide rail groove 1581 is formed on the guide rail part 158. The first limiting part 156 contacts the bottom wall of the guide rail groove 1581, and the second limiting part 157 contacts the side wall of the guide rail groove 1581.

[0077] In some embodiments, the first limiting part 156 protrudes from the protruding part 155 towards the direction close to the volute main body 142. In some embodiments, the first limiting part 156 is hemispherical. Such a setting can make the contact between the first limiting part 156 and the bottom wall of the guide rail groove 1581 a point contact, which can reduce the movement friction.

[0078] In some embodiments, the second limiting part 157 protrudes into the guide rail groove 1581, and the protruding direction of the second limiting part 157 is perpendicular to the protruding direction of the first limiting part 156. In some embodiments, the length of the second limiting part 157 perpendicular to its protruding direction is greater than or equal to the height of the protruding part 155. Such a setting can make the contact between the second limiting part 157 and the side wall of the guide rail groove 1581 a line contact, which can reduce the movement friction.

[0079] See Figure 13 , the housing assembly 200 further includes a partition plate 230 and a second housing air inlet 231.

[0080] The partition plate 230 is arranged inside the housing assembly 200 to separate the first cavity part 210 and the second cavity part 220.

[0081] The second housing air inlet 231 is formed on the partition plate 230 to communicate the first cavity part 210 and the second cavity part 220.

[0082] See Figure 11 , the housing assembly 200 further includes a damper 240, a second motor 260 and a damper bracket 250. The second motor 260 is drivingly connected to the damper bracket 250.

[0083] See Figure 14 , the damper 240 is rotatably arranged between the first housing air inlet 211 and the second housing air inlet 231 to shield the first housing air inlet 211 or the second housing air inlet 231.

[0084] The damper 240 is mounted on the damper bracket 250 to rotate under the drive of the second motor 260.

[0085] In some embodiments, a first limiting shaft 262 is provided on the air damper 240. The first limiting shaft 262 is connected to the motor shaft of the second motor 260 through a second output shaft 261. When the second motor 260 operates, the motor shaft of the second motor 260 drives the second output shaft 261 to rotate, and then drives the first limiting shaft 262 to rotate, so as to drive the air damper 240 to move.

[0086] In some embodiments, a second limiting shaft 263 is provided on the air damper 240, and a second limiting hole is provided at a corresponding position of the air damper bracket 250. The second limiting shaft 263 is inserted into the second limiting hole to mount the air damper 240 on the air damper bracket 250, so that the air damper 240 has strong stability when rotating.

[0087] Figure 15 Shows Figure 11 A side view of the housing assembly when the air damper in the fresh air system in is in the first position state. Refer to Figure 15 , when the air damper 240 is in the first position state, the air damper 240 closes the first housing air inlet 211 and opens the second housing air inlet 231.

[0088] Figure 16 Shows Figure 11 A side view of the housing assembly when the air damper in the fresh air system in is in the second position state. Refer to Figure 16 , when the air damper 240 is in the second position state, the air damper 240 closes the second housing air inlet 231 and opens the first housing air inlet 211. The arrows in the figure indicate the air flow direction.

[0089] In some embodiments, the fresh air system 10 has a fresh air introduction state, an exhaust state, and an internal circulation state. The fresh air module system has three working modes, and users can provide appropriate and efficient solutions for improving indoor air quality according to the specific conditions of indoor and outdoor air quality.

[0090] Figure 17 Shows a structural schematic diagram of an embodiment when the fresh air system 10 in the indoor unit 20 of the air conditioner according to the present invention is in the fresh air introduction state. Refer to Figure 17 , when the fresh air system 10 is in the fresh air introduction state, the volute tongue 150 is in a position blocking the exhaust passage 152, and the air damper 240 is in the first position state. The arrows in the figure indicate the air flow direction.

[0091] When the fresh air system 10 is in the fresh air introduction state, fresh air in the outdoor environment can enter the indoor environment through the fresh air system 10. The fresh air sequentially passes through the air duct assembly 500, the outdoor communication port 221, the second cavity portion 220, the second housing air inlet 231, the first cavity portion 210, the filtering component 400, the air duct air inlet 110, the air guiding channel 151, and the first air duct air outlet 120.

[0092] Figure 18 The structural schematic diagram of an embodiment in which the fresh air system 10 in the indoor unit 20 of the air conditioner according to the present invention is in the exhaust state is shown. Refer to Figure 18 When the fresh air system 10 is in the exhaust state, the volute tongue 150 is in the position of blocking the air guiding channel 151, and the air damper 240 is in the second position state. The arrows in the figure indicate the air flow direction.

[0093] When the fresh air system 10 is in the exhaust state, the turbid air in the indoor environment can be discharged into the outdoor environment through the fresh air system 10. The turbid air sequentially passes through the first housing air inlet 211, the first cavity part 210, the filtering component 400, the air duct air inlet 110, the exhaust passage 152, the second air duct air outlet 130, the second cavity part 220, the outdoor communication port 221 and the air duct assembly 500.

[0094] Figure 19 The structural schematic diagram of an embodiment in which the fresh air system 10 in the indoor unit 20 of the air conditioner according to the present invention is in the internal circulation state is shown. Refer to Figure 19 When the fresh air system 10 is in the internal circulation state, the volute tongue 150 is in the position of blocking the exhaust passage 152, and the air damper 240 is in the second position state.

[0095] When the fresh air system 10 is in the internal circulation state, the turbid air in the indoor environment can enter the indoor environment again through the fresh air system 10. The turbid air sequentially passes through the first housing air inlet 211, the first cavity part 210, the filtering component 400, the air duct air inlet 110, the air guiding channel 151 and the first air duct air outlet 120.

[0096] The indoor unit 20 of the air conditioner includes a housing and a fresh air system 10.

[0097] The fresh air system 10 is arranged inside the housing, and the fresh air system 10 is the fresh air system 10 of the above embodiment.

[0098] The indoor unit 20 of the air conditioner can select different modes of operation according to the actual situation of the indoor and outdoor air quality, and provide a suitable and efficient solution for indoor air optimization. For example, when the air quality in the indoor environment is poor, the fresh air system 10 can be turned on to the exhaust mode. At this time, the fresh air system 10 is in the exhaust state, and the relatively turbid air in the indoor environment can be discharged outdoors; when the air quality in the outdoor environment is excellent, the fresh air intake mode can be turned on. At this time, the fresh air system 10 is in the fresh air intake state, and the fresh air in the outdoor environment can be introduced into the indoor through the fresh air system 10; when the air quality in the outdoor environment is poor, the internal circulation mode can be turned on. At this time, the fresh air system 10 is in the internal circulation state, and the air in the indoor environment can be filtered through the fresh air system 10 and then discharged into the indoor environment.

[0099] As can be seen from the above description, the above embodiments of the present invention achieve the following technical effects:

[0100] In the present invention, the air flow in the indoor environment enters the first cavity portion 210 through the first housing air inlet 211 located on the housing assembly 200, flows to the air duct air inlet 110 after being filtered by the filter member 400, then flows to the fan installation cavity 141, and discharges fresh air into the room through the first air duct outlet 120. The fresh air system 10 of the present invention has an internal circulation state, introducing the air in the indoor environment into the fresh air system 10, filtering it and then sending it back into the indoor environment, avoiding the problem that when the air quality in the outdoor environment is poor, the quality of the introduced fresh air is also poor, which affects the fresh air quality, and solving the problem that the fresh air introduced into the room in the prior art cannot guarantee its quality.

[0101] It should be noted that the terms "first", "second", etc. in the specification, claims and above-mentioned drawings of this application are used to distinguish similar objects, and do not necessarily have to be used to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances, so that the embodiments of the present application described here can be implemented in an order other than those illustrated or described here. In addition, the terms "first", "second", "third", "fourth", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0102] In the description of the embodiments of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the invention is usually placed when in use. It is only for the convenience of describing the present invention and simplifying the description, and does 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 cannot be understood as a limitation to the present invention.

[0103] It also should be noted that unless otherwise clearly specified and defined, the terms "set", "installed", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0104] In the description of this specification, the descriptions with reference to the terms "some embodiments", or "other embodiments", or "in the first embodiment", or "in the second embodiment", or "in the third embodiment", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do 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.

[0105] The foregoing is only the preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various changes and modifications. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A fresh air system, characterized in that, Comprising: An air duct assembly (100), the air duct assembly (100) includes a volute, the volute has a fan installation cavity (141), a first air duct outlet (120) communicating with the fan installation cavity (141), and an air duct inlet (110) communicating with the fan installation cavity (141), the first air duct outlet (120) is used for discharging fresh air into the room, and the first air duct outlet (120) is used for communicating with the room; A housing assembly (200), the housing assembly (200) includes a first cavity portion (210), the first cavity portion (210) communicates with the air duct inlet (110), and a first housing air inlet (211) for communicating with the room is provided on the first cavity portion (210); A filtering component (400), the filtering component (400) is arranged in the first cavity portion (210) to filter the air flow entering the air duct inlet (110) from the first cavity portion (210); A second air duct outlet (130) is provided on the air duct assembly (100), the air duct assembly (100) includes a volute tongue (150), an air guiding channel (151) is provided between the fan installation cavity (141) and the first air duct outlet (120), and an exhaust channel (152) is provided between the fan installation cavity (141) and the second air duct outlet (130); the volute tongue (150) is movably arranged in the volute to block the air guiding channel (151) or the exhaust channel (152); The volute includes a volute main body (142), and a guide rail portion (158) is provided on the volute main body (142); A convex portion (155) is provided on the side of the volute tongue (150) close to the volute main body (142); A first limiting portion (156) and a second limiting portion (157) are provided on the convex portion (155); A guide rail groove (1581) is provided on the guide rail portion (158), the first limiting portion (156) contacts the bottom wall of the guide rail groove (1581), and the second limiting portion (157) contacts the side wall of the guide rail groove (1581).

2. The fresh air system according to claim 1, wherein The housing assembly (200) includes: A second cavity portion (220), the second cavity portion (220) communicates with the second air duct outlet (130), an outdoor communication port (221) is provided on the second cavity portion (220), and the outdoor communication port (221) communicates with the outdoor environment.

3. The fresh air system according to claim 1, wherein The volute includes a volute main body (142) and a volute cover (143), the volute cover (143) covers the opening of the volute main body (142), and the air duct inlet (110) is provided on the volute cover (143); The fresh air system further includes a driving device (300), the driving device (300) is drivingly connected to the volute tongue (150) to drive the volute tongue (150) to rotate around the axis of the fan installation cavity (141).

4. The fresh air system according to claim 3, wherein the volute tongue (150) includes a volute tongue main body (153), a transmission tooth (154) is provided on the volute tongue main body (153), the transmission tooth (154) is arranged on a side of the volute tongue main body (153) away from the fan installation cavity (141), and the transmission tooth (154) is arranged on a side close to the volute main body (142); the driving device (300) includes a first motor (310) and a gear (320), the gear (320) is arranged on the output shaft of the first motor (310), and the gear (320) meshes with the transmission tooth (154) to drive the volute tongue (150) to rotate around the axis of the fan installation cavity (141).

5. The fresh air system according to claim 1, wherein the volute further includes a volute cover (143), an opening of the volute main body (142) faces the volute cover (143), and an air duct air inlet (110) is formed in the volute cover (143); the protrusion (155) extends along the extending direction of the volute tongue main body (153) of the volute tongue (150).

6. The fresh air system according to claim 2, wherein The housing assembly (200) further includes: a partition (230), the partition (230) is arranged in the housing assembly (200) to separate the first cavity part (210) and the second cavity part (220); a second housing air inlet (231), the second housing air inlet (231) is formed in the partition (230) to communicate the first cavity part (210) and the second cavity part (220).

7. The fresh air system according to claim 6, wherein, The housing assembly (200) further includes: a damper (240), the damper (240) is rotatably arranged between the first housing air inlet (211) and the second housing air inlet (231) to shield the first housing air inlet (211) or the second housing air inlet (231); a second motor (260) and a damper bracket (250), the second motor (260) is drivingly connected to the damper bracket (250), and the damper (240) is installed on the damper bracket (250) to rotate under the drive of the second motor (260); wherein, when the damper (240) is in the first position state, the damper (240) closes the first housing air inlet (211) and opens the second housing air inlet (231); when the damper (240) is in the second position state, the damper (240) closes the second housing air inlet (231) and opens the first housing air inlet (211).

8. The fresh air system according to claim 7, wherein the fresh air system has a fresh air introduction state, an exhaust state and an internal circulation state; when the fresh air system is in the fresh air introduction state, the volute tongue (150) is in a position blocking the exhaust passage (152), and the damper (240) is in the first position state; When the fresh air system is in the exhaust state, the volute tongue (150) is in a position to block the air guiding channel (151), and the air damper (240) is in the second position state; When the fresh air system is in the internal circulation state, the volute tongue (150) blocks the exhaust passage (152), and the air damper (240) is in the second position state.

9. An indoor unit of an air conditioner, comprising a casing and a fresh air system (10) disposed within the casing, characterized in that The fresh air system (10) is the fresh air system according to any one of claims 1 to 8.

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