Fresh air assembly and air conditioner

Abstract

The fresh air assembly comprises an air duct shell, a wind wheel and a filtering module, the air duct shell is provided with an air passing cavity, a fresh air opening, an air outlet and a first air return opening, and the first air return opening and the air outlet are communicated with indoor space; the wind wheel is arranged in the air passing cavity and can drive air in the air passing cavity to flow to the air outlet or the fresh air opening. The filtering module is arranged in the air passing cavity; the fresh air assembly has a fresh air mode and an exhaust mode, and in the fresh air mode, the first air return opening is closed, so that outdoor air flows into the air passing cavity from the fresh air opening and flows out of the air outlet after flowing through the filtering module; in the air exhaust mode, the first air return opening is opened, so that indoor air flows into the air passing cavity from the first air return opening and flows out of the fresh air opening without passing through the filtering module. According to the technical scheme, indoor vitiated air can be prevented from flowing through the filter module in an exhaust mode, and the service life of the filter module is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of air conditioning, in particular to a fresh air component and an air conditioner. Background Art

[0002] With the promotion and popularization of fresh air air conditioning systems, people have put forward higher requirements for indoor air quality and user experience. When users close doors and windows and stay indoors for a long time, the indoor air quality will become worse and worse. By using switching valves in the fresh air components to switch between different working modes such as fresh air, exhaust, and internal circulation, the effect of purifying indoor air can be achieved without opening doors and windows, directly solving the pain points of user experience.

[0003] In existing fresh air air conditioners, the filter module usually uses consumables such as HEPA. When the return air port is opened to achieve the exhaust mode, the indoor polluted air flows into the fresh air inlet chamber through the return air port, and then flows through the filter module before being discharged to the outside through the fresh air duct. This causes the indoor polluted air to increase the filtering burden of the filter module, shorten the service life of the filter module, increase the frequency of replacement of filter consumables, and cause direct economic losses to users. Utility Model Content

[0004] The main purpose of the utility model is to provide a fresh air component, which aims to prevent indoor dirty air from flowing through the filter module in the exhaust mode, thereby prolonging the service life of the filter module.

[0005] To achieve the above purpose, the fresh air assembly proposed by the utility model includes:

[0006] The air duct shell is provided with an air passage cavity, and a fresh air inlet, an air outlet and a first return air inlet connected to the air passage cavity, the fresh air inlet is connected to the outdoor space, and the first return air inlet and the air outlet are connected to the indoor space;

[0007] a wind wheel, disposed in the air passage cavity and capable of driving the air in the air passage cavity to flow toward the air outlet or the fresh air outlet; and

[0008] A filter module is arranged in the air passage cavity;

[0009] The fresh air component has a fresh air mode and an exhaust mode. In the fresh air mode, the first return air outlet is closed to allow outdoor air to flow into the air cavity from the fresh air outlet and flow out of the air outlet after passing through the filter module; in the exhaust mode, the first return air outlet is opened to allow indoor air to flow into the air cavity from the first return air outlet and flow out of the fresh air outlet without passing through the filter module.

[0010] Optionally, the air duct shell is also provided with a second return air outlet, and the fresh air component also has an internal circulation mode. In the internal circulation mode, the first return air outlet is closed and the second return air outlet is opened, so that indoor air flows into the air passage cavity from the second return air outlet and flows out of the air outlet after passing through the filter module.

[0011] Optionally, the fresh air component further includes a first switching valve disposed on the air duct shell, and the first switching valve can selectively open one of the first return air outlet and the second return air outlet, and close the other one.

[0012] Optionally, the first switching valve includes a first driving member provided on the air duct shell and a first valve drivingly connected to the first driving member, and the first valve can rotate relative to the air duct shell and cover the first return air outlet or the second return air outlet.

[0013] Optionally, the rotation axis of the first valve is arranged at the side and intersects with the normal line of the first return air outlet, and the first return air outlet and the second return air outlet are arranged on opposite sides of the rotation axis of the first valve.

[0014] Optionally, the rotation axis of the first valve is arranged in parallel with the normal line of the first return air outlet, and the first return air outlet and the second return air outlet are arranged on the same side of the rotation axis of the first valve.

[0015] Optionally, the rotation axis of the first valve is arranged in the middle, and the first valve is provided with an avoidance through hole, and the avoidance through hole can selectively conduct to the first return air outlet or the second return air outlet.

[0016] Optionally, the first switching valve can also cover the first return air outlet and the second return air outlet at the same time.

[0017] Optionally, the first return air inlet is arranged on the air outlet side of the wind wheel, and the second return air inlet and the filter module are arranged on the air inlet side of the wind wheel.

[0018] Optionally, the wind wheel is configured as a centrifugal wind wheel, the air passage cavity includes a volute cavity, the volute cavity is connected to the air outlet, the first return air outlet and the second return air outlet, and the centrifugal wind wheel is arranged in the volute cavity.

[0019] Optionally, the air outlet is arranged at the first end of the volute cavity, the centrifugal wind wheel is arranged at the second end of the volute cavity, the air passage cavity also includes a first cavity and a second cavity arranged side by side on the same side of the volute cavity, the first cavity connects the first end of the volute cavity and the fresh air outlet, the second cavity connects the second end of the volute cavity and the first cavity, the fresh air component also includes a second switching valve arranged on the air duct shell, the second switching valve is arranged at the connecting point of the first cavity and the second cavity, and can connect or disconnect the first cavity and the second cavity.

[0020] Optionally, the fresh air component also includes a third switching valve arranged on the air duct shell, and the third switching valve can open or close the air outlet; the air passage cavity also includes an exhaust channel, and the exhaust channel is connected between the first end of the volute cavity and the first cavity.

[0021] Optionally, the second switching valve can also open or close the exhaust passage.

[0022] Optionally, a diverter plate is provided on the inner wall surface of the air duct shell, and the diverter plate divides the first cavity into a first diverter channel and a second diverter channel. The first diverter channel and the second diverter channel are both connected to the fresh air outlet and the second cavity, and the airflow stroke of the second diverter channel is smaller than the airflow stroke of the first diverter channel.

[0023] Optionally, the fresh air component also includes a fourth switching valve, the second switching valve can synchronously open or close the first branch channel and the second branch channel, and can open or close the second return air outlet; the fourth switching valve can open or close the first branch channel, and can open or close the exhaust channel.

[0024] Optionally, the filter module comprises a filter screen, and the filter screen covers the inlet of the volute cavity.

[0025] The utility model also provides an air conditioner, comprising the above-mentioned fresh air component.

[0026] In the technical solution of the utility model, since the indoor dirty air flows into the air cavity from the first return air outlet and then flows directly to the fresh air outlet, and does not flow through the filter module, it can avoid the indoor dirty air flowing through the filter module in the exhaust mode, thereby increasing the service life of the filter module. Secondly, the exhaust mode and the fresh air mode share the air cavity, which is conducive to simplifying the structure of the air duct shell, reducing the size and volume of the fresh air component, and reducing the manufacturing cost of the fresh air component. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0028] Figure 1 This is a structural schematic diagram of an embodiment of a fresh air component of the utility model;

[0029] Figure 2 for Figure 1 A schematic diagram of the internal structure of the embodiment shown in the fresh air mode;

[0030] Figure 3 for Figure 1 A schematic diagram of the internal structure of the embodiment shown in the exhaust mode;

[0031] Figure 4 for Figure 1 The internal structure schematic diagram of the embodiment shown is in the internal circulation mode;

[0032] Figure 5 for Figure 1 An exploded view of some parts of the illustrated embodiment;

[0033] Figure 6 This is a structural schematic diagram of another embodiment of the fresh air component of the utility model;

[0034] Figure 7 for Figure 6 A schematic diagram of the internal structure of the embodiment shown in the fresh air mode;

[0035] Figure 8 for Figure 6 A schematic diagram of the internal structure of the embodiment shown in the exhaust mode;

[0036] Fig. 9 for Figure 6 The internal structure diagram of the embodiment shown is in the internal circulation mode.

[0037] Description of Figure Numbers:

[0038] Label name Label name 10 Air duct shell 20 Filter module 11 Air cavity 30 First switching valve 111 First cavity 31 First drive member 112 Second cavity 32 First Valve 113 Volute cavity 321 Avoid through holes 12 New outlet 331 Driving gear 13 Air outlet 332 Driven gear 14 First return vent 34 Protective cover 15 Second return vent 341 Air opening 16 Exhaust duct 41 Second switching valve 17 Manifold 42 The third switching valve 171 The first branch channel 43 Fourth switching valve 172 Second branch channel

[0039] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0041] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0042] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" 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 a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0043] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0044] With the promotion and popularization of fresh air air conditioning systems, people have put forward higher requirements for indoor air quality and user experience. When users close doors and windows and stay indoors for a long time, the indoor air quality will become worse and worse. By using switching valves in the fresh air components to switch between different working modes such as fresh air, exhaust, and internal circulation, the effect of purifying indoor air can be achieved without opening doors and windows, directly solving the pain points of user experience.

[0045] In existing fresh air air conditioners, the filter module usually uses consumables such as HEPA. When the return air port is opened to achieve the exhaust mode, the indoor polluted air flows into the fresh air inlet chamber through the return air port, and then flows through the filter module before being discharged to the outside through the fresh air duct. This causes the indoor polluted air to increase the filtering burden of the filter module, shorten the service life of the filter module, increase the frequency of replacement of filter consumables, and cause direct economic losses to users.

[0046] In view of this, the utility model provides a fresh air component and an air conditioner using the fresh air component.

[0047] Please refer to Figures 1 to 5 In one embodiment of the utility model, the fresh air component includes:

[0048] The air duct shell 10 is provided with an air passage cavity 11, and a fresh air inlet 12, an air outlet 13 and a first return air inlet 14 connected to the air passage cavity 11. The fresh air inlet 12 is connected to the outdoor space, and the first return air inlet 14 and the air outlet 13 are connected to the indoor space.

[0049] A wind wheel (not shown in the drawings) is disposed in the air passage cavity 11 and is capable of driving the air in the air passage cavity 11 to flow toward the air outlet 13 or the fresh air outlet 12; and

[0050] The filter module 20 is disposed in the air passage cavity 11;

[0051] The fresh air component has a fresh air mode and an exhaust mode. In the fresh air mode, the first return air vent 14 is closed to allow outdoor air to flow into the air cavity 11 from the fresh air vent 12 and flow out of the air outlet 13 after passing through the filter module 20; in the exhaust mode, the first return air vent 14 is opened to allow indoor air to flow into the air cavity 11 from the first return air vent 14 and flow out of the fresh air vent 12 without passing through the filter module 20.

[0052] Specifically, the filter module 20 is located upstream of the connection between the first return air outlet 14 and the air cavity 11. Since the filter module 20 is located upstream of the connection between the first return air outlet 14 and the air cavity 11 in the exhaust mode, the indoor dirty air flows into the air cavity 11 from the first return air outlet 14 and directly flows to the fresh air outlet 12 without flowing through the filter module 20.

[0053] In the technical solution of the utility model, since the indoor dirty air flows into the air cavity 11 from the first return air port 14, it will directly flow to the fresh air port 12, and will not flow through the filter module 20, so that the indoor dirty air can be prevented from flowing through the filter module 20 in the exhaust mode, thereby increasing the service life of the filter module 20. Secondly, the exhaust mode and the fresh air mode share the air cavity 11, which is conducive to simplifying the structure of the air duct housing 10, reducing the size and volume of the fresh air component, and reducing the manufacturing cost of the fresh air component.

[0054] It should be noted that the outflow direction refers to the direction from the internal space of the fresh air component to its external space, and the inflow direction refers to the direction from the external space of the fresh air component to its internal space; and upstream refers to the position closer to the source of the airflow in the actual flow direction, so it is a relative concept and will change accordingly after the actual flow direction changes. For example, in the fresh air mode, the fresh air outlet 12 is located upstream of the first return air outlet 14, and in the exhaust mode, the first return air outlet 14 is located upstream of the fresh air outlet 12.

[0055] Please refer to Figure 4 and Fig. 9 In some embodiments, the air duct housing 10 is optionally provided with a second return air port 15, and the fresh air assembly also has an internal circulation mode. In the internal circulation mode, the first return air port 14 is closed and the second return air port 15 is opened, so that the indoor air flows into the air cavity 11 from the second return air port 15, and flows out of the air outlet 13 after passing through the filter module 20. Specifically, the filter module 20 is located downstream of the connection point of the second return air port 15 in the air cavity 11. In this way, the air conditioner equipped with the fresh air assembly also has an internal circulation purification function. After the indoor dirty air flows in from the second return air port 15, it can first flow through the filter module 20 and then flow through the air outlet 13 to provide air with improved air quality to the indoor space, thereby enriching the use function of the air conditioner and improving the use experience. Secondly, the internal circulation mode, the exhaust mode and the fresh air mode share the air cavity 11, which is conducive to simplifying the structure of the air duct housing 10, further reducing the size and volume of the fresh air assembly, and further reducing the manufacturing cost of the fresh air assembly. Of course, in other embodiments, the second air return port 15 and the internal circulation mode may not be provided.

[0056] Please refer to Figures 2 to 5 , Figures 6 to 9In some embodiments, optionally, the fresh air component also includes a first switching valve 30 provided on the air duct shell 10, and the first switching valve 30 can selectively open one of the first return air port 14 and the second return air port 15, and close the other. In this way, the opening and closing of the first return air port 14 and the second return air port 15 are synchronously controlled by the first switching valve 30, and the mode switching between the exhaust mode and the internal circulation mode is realized. The structure is simple and easy to implement, which is not only conducive to reducing the size and volume of the fresh air component, but also can reduce the manufacturing cost of the fresh air component. In other embodiments, two independently operated valve structures can also be used to control the opening and closing of the first return air port 14 and the second return air port 15 respectively. In other embodiments, other structural forms may be used instead of the valve structure, such as airbags and cylinders. Airbags are provided in the first return air port 14 and the second return air port 15. The airbags are inflated by the cylinders and fill the first return air port 14 (or the second return air port 15) to close the first return air port 14 (or the second return air port 15). The gas in the airbags is drawn away by the cylinders and dries up to open the first return air port 14 (or the second return air port 15). Of course, other structural forms may be used to realize the opening and closing control of the first return air port 14 and the second return air port 15, and this application does not make specific limitations on this.

[0057] In some embodiments, further optionally, the first switching valve 30 includes a first driving member 31 provided on the air duct housing 10 and a first valve 32 driven and connected to the first driving member 31, and the first valve 32 can rotate relative to the air duct housing 10 and cover the first return air port 14 or the second return air port 15. That is, the first valve 32 has a first position and a second position, and when the first valve 32 is in the first position, the first return air port 14 is opened and the second return air port 15 is closed, and when the first valve 32 is in the second position, the first return air port 14 is closed and the second return air port 15 is opened. In this way, the first valve 32 covers the first return air port 14 or the second return air port 15 by rotating, and the structure is simple and easy to implement, and it is also beneficial to reduce the space size occupied by the motion trajectory of the first valve 32, so as to facilitate the miniaturization design of the fresh air component. Of course, in other embodiments, the first valve 32 can also be in the form of sliding, that is, the first valve 32 is slidably connected to the air duct housing 10, and can be translated relative to the air duct housing 10 by the drive of the first driving member 31.

[0058] Specifically, the first switching valve 30 has various structural forms, for example, please refer to Figure 5In one embodiment, the rotation axis of the first valve 32 is arranged in parallel with the normal line of the first return air port 14, and the first return air port 14 and the second return air port 15 are arranged on the same side of the rotation axis of the first valve 32. In this embodiment, the first return air port 14 and the second return air port 15 are located approximately in the same plane. For example, when the first valve 32 covers the first return air port 14 (i.e., corresponding to the second position) at 0°, the first valve 32 will cover the second return air port 15 (i.e., corresponding to the first position) after rotating an angle β inside the air duct housing 10, so that one of the first return air port 14 and the second return air port 15 is opened, and the other is closed at the same time. The value range of the rotation angle β is 90° to 150°.

[0059] Please refer to Figure 5 In one embodiment, further optionally, the rotation axis of the first valve 32 is arranged in the middle, and the first valve 32 is provided with an avoidance through hole 321, and the avoidance through hole 321 can selectively conduct the first return air port 14 or the second return air port 15;

[0060] Please refer to Figure 2 and Figure 5 In one embodiment, further optionally, the first switching valve 30 can also cover the first return air port 14 and the second return air port 15 at the same time. In this way, in the fresh air mode, the first switching valve 30 of this embodiment can close the first return air port 14 and the second return air port 15 at the same time, ensuring that the fresh air introduced from the outdoor space flows out from the air outlet 13, but does not flow out from the first return air port 14 and the second return air port 15, thereby ensuring the air volume at the air outlet 13. Of course, in other embodiments, the first return air port 14 and the second return air port 15 may not be closed in the fresh air mode.

[0061] In one embodiment, specifically and optionally, the central angle corresponding to the avoidance through hole 321 is set to 120°, and the rotation angle β can be correspondingly set to 120°. For example, when the avoidance through hole 321 is aligned with the first return air outlet 14, it is 0° (at this time, the first valve 32 opens the first return air outlet 14 and the second return air outlet 15 is covered, such as Figure 3 The avoidance through hole 321 will be aligned with the second return air port 15 after rotating 120° inside the air duct housing 10 (at this time, the first valve 32 opens the second return air port 15 and the first return air port 14 is covered, as shown in FIG. Figure 4 After further rotating 120° in the rotation direction, the first return air outlet 14 and the second return air outlet 15 will be covered (as shown in the second position). Figure 2 In this way, the conduction switching between the first return air outlet 14 and the second return air outlet 15 is realized, and the structure is simple and easy to realize.

[0062] Please refer to Figure 5In one embodiment, optionally, the first switching valve 30 further includes a transmission gear set, wherein the first-stage driving gear 331 of the transmission gear set is arranged on the rotating shaft of the first driving member 31, and the final-stage driven gear 332 is arranged on the first valve 32. In this way, the driving force of the first driving member 31 is transmitted to the first valve 32 through the transmission gear set, which has a simple structure and a smooth transmission, and can achieve the effect of reducing speed and increasing torque. Specifically, optionally, in this embodiment, the transmission gear set is configured as a single-stage transmission, that is, it includes a driving gear 331 and a driven gear 332. Of course, in other embodiments, the transmission gear set can also be configured as a multi-stage transmission, that is, it includes multiple driving gears 331 and multiple driven gears 332. In other embodiments, the transmission gear set may not be provided, or other transmission structure forms may be adopted.

[0063] In one embodiment, further optionally, the first valve 32 and the final driven gear 332 are configured as the same structure, and the teeth of the final driven gear 332 are arranged on the outer peripheral surface of the first valve 32, so that the structure of the first switching valve 30 can be simplified and its manufacturing cost can be reduced. Of course, in other embodiments, the final driven gear 332 and the first valve 32 can also be set as two structures, that is, the final driven gear 332 and the first valve 32 are distributed along the axis direction of the final driven gear 332.

[0064] Please refer to Figure 5 In one embodiment, further optionally, the first switching valve 30 also includes a protective cover 34, which covers the transmission gear set and has air openings 341 corresponding to the first return air port 14 and the second return air port 15. The rotating shaft of the first driving member 31 passes through the protective cover 34 and is connected to the driving gear 331, and the driven gear 332 (i.e., the first valve 32) is rotatably connected between the protective cover 34 and the air duct shell 10.

[0065] Of course, please refer to Figures 6 to 9 In another embodiment, the rotation axis of the first valve 32 may be arranged at the side and intersect with the normal of the first return air port 14, and the first return air port 14 and the second return air port 15 are arranged on opposite sides of the rotation axis of the first valve 32. Specifically and optionally in this embodiment, the first return air port 14 and the second return air port 15 are approximately located in the same plane. For example, when the first valve 32 covers the first return air port 14 (i.e., corresponding to the second position) at 0°, the first valve 32 will cover the second return air port 15 (i.e., corresponding to the first position) after rotating 180° on the outside of the air duct shell 10, so that one of the first return air port 14 and the second return air port 15 is opened, and the other is closed at the same time. In this way, the structure is simple and easy to implement.

[0066] Please refer to Figure 5 and Figure 6In some embodiments, optionally, the first return air port 14 is arranged on the air outlet side of the wind wheel, and the second return air port 15 and the filter module 20 are arranged on the air inlet side of the wind wheel. In this way, in the return air mode, it can be ensured that the indoor dirty air flowing in from the first return air port 14 will not flow through the filter module 20, and the arrangement of the first return air port 14 and the second return air port 15 can be made more compact, which is conducive to the miniaturization design of the first switching valve 30. Of course, in other embodiments, the first return air port 14 and the second return air port 15 can be both arranged on the air inlet side of the wind wheel, or both arranged on the air outlet side of the wind wheel.

[0067] In some embodiments, optionally, the wind wheel is configured as a centrifugal wind wheel, the air passage cavity 11 includes a volute cavity 113, the volute cavity 113 is connected to the air outlet 13, the first return air outlet 14 and the second return air outlet 15, and the centrifugal wind wheel is arranged in the volute cavity 113. Further optionally, the first return air outlet 14 and the second return air outlet 15 are arranged on the same side of the volute cavity 113. In this way, the use of a centrifugal wind wheel is conducive to the thin design of the fresh air component. Secondly, it can further make the arrangement of the first return air outlet 14 and the second return air outlet 15 more closely, which is conducive to the miniaturized design of the first switching valve 30. Of course, in other embodiments, other forms of wind wheels, such as axial flow wind wheels or cross-flow wind wheels, etc., can also be used.

[0068] Please refer to Figure 2 and Figure 7 In some embodiments, the filter module 20 may optionally include a filter screen, which covers the entrance of the volute cavity 113. In this way, the filter screen provided at the entrance of the volute cavity 113 can filter and purify the air flowing through the centrifugal wind wheel regardless of the fresh air mode or the internal circulation mode, and the structure is simple and easy to implement. Of course, in other embodiments, it may also be a filter device with other structural forms, such as an electrostatic purification device, etc., which is not specifically limited in this application.

[0069] It is worth mentioning that in the embodiment of the present application, the air conditioner casing may be provided with a casing return air outlet, and the first return air outlet 14 and the second return air outlet 15 share the casing return air outlet, or the casing may be provided with two casing return air outlets, and the first return air outlet 14 and the second return air outlet 15 are respectively connected to one of the casing return air outlets.

[0070] Please refer to Figure 2 , Figure 3 , Figure 7 and Figure 8In some embodiments, optionally, the air outlet 13 is arranged at the first end of the volute cavity 113, the centrifugal wind wheel is arranged at the second end of the volute cavity 113, the air passage cavity 11 also includes a first cavity 111 and a second cavity 112 arranged side by side on the same side of the volute cavity 113, the first cavity 111 connects the first end of the volute cavity 113 and the fresh air outlet 12, the second cavity 112 connects the second end of the volute cavity 113 and the first cavity 111, and the fresh air component also includes a second switching valve 41 arranged on the air duct shell 10, the second switching valve 41 is arranged at the connection point between the first cavity 111 and the second cavity 112, and can connect or disconnect the first cavity 111 and the second cavity 112. In this way, the first switching valve 30 and the second switching valve 41 cooperate with each other to realize the reversing flow of air in the air passage cavity 11, and realize the mode switching between the fresh air mode and the exhaust mode, and the structure is simple and easy to realize.

[0071] Specifically, when the fresh air component is in the fresh air mode, the second switching valve 41 conducts the connection between the first cavity 111 and the second cavity 112, so that the air in the outdoor space can flow through the fresh air inlet 12, the first cavity 111, the second cavity 112, the volute cavity 113 and the air outlet 13 in sequence, and the first return air inlet 14 and the second return air inlet 15 are closed. Figure 2 As shown; of course, the first return air vent 14 and the second return air vent 15 may not be closed. When the fresh air component is in the exhaust mode, the second switching valve 41 disconnects the connection between the first cavity 111 and the second cavity 112, the first return air vent 14 is opened and the second return air vent 15 is closed, so that the air in the indoor space can flow through the first return air vent 14, the second cavity 112, the volute cavity 113, the first cavity 111 and the fresh air vent 12 in sequence; preferably, the air outlet 13 is closed at this time, as shown in FIG. Figure 3 Of course, the air outlet 13 may not be closed.

[0072] Please refer to Figure 2 , Figure 3 , Figure 7 and Figure 8 In some embodiments, the fresh air assembly may further include a third switching valve 42 disposed on the air duct housing 10, and the third switching valve 42 may open or close the air outlet 13; the air passage 11 may further include an exhaust passage 16, and the exhaust passage 16 may be connected between the first end of the volute cavity 113 and the first cavity 111. Specifically, the third switching valve 42 has a sixth position and a seventh position. The third switching valve 42 in the sixth position opens the air outlet 13, as shown in FIG. Figure 2 and Figure 7 The third switching valve 42 in the seventh position closes the air outlet 13, as shown Figure 3 and Figure 8 shown.

[0073] Please refer to Figures 2 to 4In one embodiment, optionally, the second switching valve 41 can also open or close the exhaust passage 16. Specifically, the second switching valve 41 has a fourth position and a fifth position. The second switching valve 41 in the fourth position closes the exhaust passage 16 and connects the connection between the first cavity 111 and the second cavity 112. Figure 2 The second switching valve 41 in the fifth position opens the exhaust passage 16 and disconnects the connection between the first cavity 111 and the second cavity 112, as shown Figure 3 and Figure 4 shown.

[0074] When the fresh air component is in the fresh air mode, the second switching valve 41 is in the fourth position, the third switching valve 42 is in the sixth position, and the first switching valve 30 is in the third position so that the first return air port 14 and the second return air port 15 are both closed, so that the air in the outdoor space flows out only through the air outlet 13. Figure 2 shown.

[0075] When the fresh air component is in the exhaust mode, the second switching valve 41 is in the fifth position, the third switching valve 42 is in the seventh position, and the first switching valve 30 is in the first position, so that the air in the indoor space only flows out through the fresh air outlet 12. Figure 3 shown.

[0076] When the fresh air component is in the internal circulation mode, the second switching valve 41 is in the fifth position, the third switching valve 42 is in the seventh position, and the first switching valve 30 is in the second position, so that the air in the indoor space flows out only through the air outlet 13. Figure 4 shown.

[0077] Therefore, in one embodiment, the corresponding relationship between various working modes and tangential valves is shown in Table 1 below.

[0078] Table 1

[0079]

[0080] Please refer to Figure 7In another embodiment, optionally, a flow divider 17 is provided on the inner wall of the air duct housing 10, and the flow divider 17 divides the first cavity 111 into a first flow divider 171 and a second flow divider 172. The first flow divider 171 connects the fresh air outlet 12 and the second cavity 112, and the second flow divider 172 also connects the fresh air outlet 12 and the second cavity 112. The air flow stroke of the second flow divider 172 is smaller than the air flow stroke of the first flow divider 171. In this way, when fresh air is introduced in the fresh air mode, part of the fresh air can be separated from other fresh air and flow alone in the second flow divider 172 with a shorter stroke, without having to flow forward for a distance with other fresh air and then turn to the second cavity 112, so that it can be blown out of the first cavity 111 faster and blown to the centrifugal fan. That is, the second branch channel 172 with a shorter stroke accelerates part of the fresh air, so that part of the fresh air is blown out of the fresh air component and blown into the room faster, and then the fresh air in the first branch channel 171 gradually follows up, thereby shortening the time for the fresh air to flow into the room as a whole, increasing the fresh air output per unit time, and thus improving the fresh air intake efficiency.

[0081] Please refer to Figures 7 to 9 In another embodiment, optionally, the fresh air component also includes a fourth switching valve 43, the second switching valve 41 can synchronously open or close the first branch channel 171 and the second branch channel 172 (i.e., the connection point between the first cavity 111 and the second cavity 112), and the second switching valve 41 can also open or close the second return air port 15; the fourth switching valve 43 can open or close the first branch channel 171, and the fourth switching valve 43 can also open or close the exhaust channel 16.

[0082] Specifically, in another embodiment, the second switching valve 41 has an eighth position and a ninth position. The second switching valve 41 in the eighth position closes the second return air port 15 and opens the first branch channel 171 and the second branch channel 172. Figure 7 The second switching valve 41 in the ninth position opens the second return air port 15 and closes the first branch channel 171 and the second branch channel 172, as shown in FIG. Figure 8 and Fig. 9 shown.

[0083] The fourth switching valve 43 has a tenth position and an eleventh position. The fourth switching valve 43 in the tenth position opens the exhaust passage 16 and closes the flow passage opening of the first branch flow passage 171. Figure 8 The fourth switching valve 43 in the eleventh position closes the exhaust passage 16 and opens the flow passage opening of the first branch flow passage 171, as shown Figure 7 and Fig. 9 shown.

[0084] Therefore, in another embodiment, the corresponding relationship between various working modes and tangential valves is shown in Table 2 below.

[0085] Table 2

[0086]

[0087] The utility model also proposes an air conditioner, which includes the above-mentioned fresh air component. The specific structure of the fresh air component refers to the above-mentioned embodiment. Since the air conditioner adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be described one by one here.

[0088] The above description is only an optional embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A fresh air component, characterized in that: include: The air duct shell is provided with an air passage cavity, and a fresh air inlet, an air outlet and a first return air inlet connected to the air passage cavity, the fresh air inlet is connected to the outdoor space, and the first return air inlet and the air outlet are connected to the indoor space; A wind wheel, disposed in the air passage cavity, and capable of driving the air in the air passage cavity to flow toward the air outlet or the fresh air outlet; as well as A filter module is arranged in the air passage cavity; The fresh air component has a fresh air mode and an exhaust mode. In the fresh air mode, the first return air outlet is closed to allow outdoor air to flow into the air cavity from the fresh air outlet and flow out of the air outlet after passing through the filter module; in the exhaust mode, the first return air outlet is opened to allow indoor air to flow into the air cavity from the first return air outlet and flow out of the fresh air outlet without passing through the filter module.

2. The fresh air assembly according to claim 1, characterized in that: The air duct shell is also provided with a second return air outlet, and the fresh air component also has an internal circulation mode. In the internal circulation mode, the first return air outlet is closed and the second return air outlet is opened, so that indoor air flows into the air passage cavity from the second return air outlet and flows out of the air outlet after passing through the filter module.

3. The fresh air assembly according to claim 2, characterized in that: The fresh air component also includes a first switching valve disposed on the air duct shell, and the first switching valve can selectively open one of the first return air port and the second return air port, and close the other.

4. The fresh air assembly according to claim 3, characterized in that: The first switching valve includes a first driving member disposed on the air duct housing and a first valve drivingly connected to the first driving member. The first valve can rotate relative to the air duct housing and cover the first return air port or the second return air port.

5. The fresh air assembly according to claim 4, characterized in that: The rotation axis of the first valve is arranged at the side and intersects with the normal line of the first return air outlet. The first return air outlet and the second return air outlet are arranged on opposite sides of the rotation axis of the first valve.

6. The fresh air assembly according to claim 4, characterized in that: The rotation axis of the first valve is arranged in parallel with the normal line of the first return air port, and the first return air port and the second return air port are arranged on the same side of the rotation axis of the first valve.

7. The fresh air assembly according to claim 6, characterized in that: The rotation axis of the first valve is arranged in the middle, and the first valve is provided with an avoidance through hole, and the avoidance through hole can selectively conduct to the first return air outlet or the second return air outlet; And / or, the first switching valve can also cover the first return air outlet and the second return air outlet at the same time.

8. The fresh air assembly according to claim 2, characterized in that: The first return air inlet is arranged on the air outlet side of the wind wheel, and the second return air inlet and the filter module are arranged on the air inlet side of the wind wheel.

9. The fresh air assembly according to claim 8, characterized in that: The wind wheel is configured as a centrifugal wind wheel, the air passage cavity includes a volute cavity, the volute cavity is connected to the air outlet, the first return air outlet and the second return air outlet, and the centrifugal wind wheel is arranged in the volute cavity.

10. The fresh air assembly according to claim 9, characterized in that: The air outlet is arranged at the first end of the volute cavity, the centrifugal wind wheel is arranged at the second end of the volute cavity, the air passage cavity also includes a first cavity and a second cavity arranged side by side on the same side of the volute cavity, the first cavity is connected to the first end of the volute cavity and the fresh air outlet, the second cavity is connected to the second end of the volute cavity and the first cavity, the fresh air component also includes a second switching valve arranged on the air duct shell, the second switching valve is arranged at the connection between the first cavity and the second cavity, and can connect or disconnect the first cavity and the second cavity.

11. The fresh air assembly according to claim 10, characterized in that: The fresh air component also includes a third switching valve arranged on the air duct shell, and the third switching valve can open or close the air outlet; the air passage cavity also includes an exhaust channel, and the exhaust channel is connected between the first end of the volute cavity and the first cavity.

12. The fresh air assembly according to claim 11, characterized in that: The second switching valve can also open or close the exhaust passage.

13. The fresh air assembly according to claim 11, characterized in that: The inner wall surface of the air duct shell is provided with a diverter plate, and the diverter plate divides the first cavity into a first diverter channel and a second diverter channel. The first diverter channel and the second diverter channel are both connected to the fresh air outlet and the second cavity, and the airflow stroke of the second diverter channel is smaller than the airflow stroke of the first diverter channel.

14. The fresh air assembly according to claim 13, characterized in that: The fresh air component also includes a fourth switching valve, the second switching valve can synchronously open or close the first branch channel and the second branch channel, and can open or close the second return air outlet; the fourth switching valve can open or close the first branch channel, and can open or close the exhaust channel.

15. The fresh air assembly according to claim 9, characterized in that: The filter module includes a filter screen, and the filter screen covers the inlet of the volute cavity.

16. An air conditioner, characterized in that: Comprising the fresh air component as described in any one of claims 1 to 15.

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