Fresh air system and air conditioner

Abstract

The application provides a fresh air system and an air conditioner. The fresh air system comprises a shell, a centrifugal fan blade, a fresh air duct, a dirty air duct and an indoor air duct. The shell has an air guide cavity and a first air duct, a second air duct, a first air guide opening and a second air guide opening which are all in communication with the air guide cavity. The first air guide opening and the second air guide opening are oppositely arranged, and the first air duct and the second air duct are both arranged in an openable or closable manner. The centrifugal fan blade is rotatably arranged in the air guide cavity. The fresh air duct is in communication with the first air guide opening in an on-off manner. The dirty air duct is in communication with the second air duct. The indoor air duct is in communication with the second air guide opening in an on-off manner. According to the scheme, the outdoor fresh air can enter the indoor air and the indoor air can be discharged to the outdoor air by the cooperation of the opening or closing of the different air ducts, and the mixed heat exchange of the outdoor air and the indoor air can be realized. Moreover, the fresh air system can realize the above functions by using one centrifugal fan blade, so that the structure can be simplified and the cost can be reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of air conditioners, in particular to a fresh air system and an air conditioner. BACKGROUND

[0002] Air conditioner refers to the equipment mainly used for adjusting indoor air temperature. Due to the emerging air pollution problems such as haze, people pay more and more attention to indoor air quality and air purification function of indoor air conditioner. At present, the indoor unit of floor type air conditioner on the market is usually provided with a fresh air device, but most of them introduce outdoor fresh air into indoor environment to improve indoor air quality, and there are few products that can introduce indoor polluted air to outdoor environment. The existing fresh air system that can realize the bidirectional flow of indoor and outdoor air needs to use two fan blades to realize it, which has complex structure and high cost. SUMMARY

[0003] The present application provides a fresh air system and an air conditioner to reduce the cost of the existing fresh air system.

[0004] In order to achieve the above purpose, according to one aspect of the present application, a fresh air system is provided, comprising: a shell, the shell has an air induction cavity, and a first air duct, a second air duct, a first air induction port and a second air induction port which are all in communication with the air induction cavity, wherein the first air induction port and the second air induction port are oppositely arranged, and the first air duct and the second air duct are both openably or closably arranged; a centrifugal fan blade rotatably arranged in the air induction cavity; a fresh air duct which is in communication with the first air induction port in an on-off manner; a polluted air duct which is in communication with the second air duct; and an indoor air duct which is in communication with the second air induction port in an on-off manner.

[0005] Further, the fresh air system further comprises: a first air blocking part arranged in the first air duct, at least a part of the first air blocking part is movably arranged to open or close the first air duct; and a second air blocking part arranged in the first air duct, at least a part of the second air blocking part is movably arranged to open or close the second air duct.

[0006] Further, the first air blocking part comprises: a baffle which is rotatably arranged to open or close the first air duct; and a driving part which is drivingly connected with the baffle to drive the baffle to rotate.

[0007] Further, the extension directions of the first air duct and the second air duct are both perpendicular to the axial direction of the centrifugal fan blade, the fresh air duct extends along the axial direction of the centrifugal fan blade; and the polluted air duct comprises a first pipe segment, a second pipe segment and a third pipe segment which are connected in sequence, wherein the first pipe segment is in communication with the second air duct, and the third pipe segment extends along the axial direction of the centrifugal fan blade.

[0008] Further, the fresh air system further comprises a filter screen arranged in the fresh air duct.

[0009] According to another aspect of the present application, there is provided an air conditioner comprising the fresh air system as described above.

[0010] Further, the air conditioner further comprises a housing, and a heat exchange structure, both of which are arranged in a cavity of the housing, and the fresh air system is arranged below the heat exchange structure.

[0011] Further, the housing has a front wall, a rear wall, a first side wall and a second side wall between the front wall and the rear wall, the first side wall has an indoor air inlet, the second side wall has a fresh air outlet, and the rear wall has a fresh air inlet and a dirty air outlet, wherein the fresh air inlet is in communication with the fresh air duct, the fresh air outlet is in communication with the first air duct, the indoor air inlet is in communication with the indoor air duct, and the dirty air outlet is in communication with the dirty air duct.

[0012] Further, the air conditioner further comprises a first air door for opening or closing the indoor air inlet, a second air door for opening or closing the fresh air inlet, and a third air door for opening or closing the dirty air outlet.

[0013] Further, the heat exchange structure comprises a fan having an upper air outlet and a lower air outlet with selectable air outlet, and a heat exchanger arranged above the fan.

[0014] The technical scheme of the present application provides a fresh air system, which comprises a housing, a centrifugal fan blade, a fresh air duct, a dirty air duct and an indoor air duct, the housing has an air guide cavity and a first air duct, a second air duct, a first air inlet and a second air inlet in communication with the air guide cavity, wherein the first air inlet and the second air inlet are arranged oppositely, and the first air duct and the second air duct are arranged in an openable or closable manner; the centrifugal fan blade is rotatably arranged in the air guide cavity; the fresh air duct is in communication with the first air inlet in an openable or closable manner; the dirty air duct is in communication with the second air duct; and the indoor air duct is in communication with the second air inlet in an openable or closable manner. With the scheme, the outdoor fresh air can enter the indoor air and the indoor air can be discharged to the outdoor air by the cooperation of the opening or closing of the different air ducts, and the mixing and heat exchange of the outdoor air and the indoor air can be realized. Moreover, the fresh air system can realize the above functions by using one centrifugal fan blade, so that the structure can be simplified and the cost can be reduced. BRIEF DESCRIPTION OF DRAWINGS

[0015] The accompanying drawings, which form a part of this specification, are included to provide a further understanding of the application, and are incorporated in and constitute a part of this specification. The embodiments of the application, together with their

[0016] Figure 1 A structural schematic view of the fresh air system provided by the embodiment of the application is shown;

[0017] Figure 2 A sectional view of the fresh air system in Figure 1 is shown;

[0018] Figure 3 A schematic view of the fresh air system in Figure 1 is shown in the fresh air mode;

[0019] Figure 4 A sectional view of the fresh air system in Figure 3 is shown;

[0020] Figure 5 A schematic view of the fresh air system in Figure 1 is shown in the exhaust air mode;

[0021] Figure 6 A sectional view of the fresh air system in Figure 5 is shown;

[0022] Figure 7 A schematic view of the fresh air system in Figure 1 is shown in the fresh air heat exchange mode;

[0023] Figure 8 A sectional view of the fresh air system in Figure 7 is shown;

[0024] Figure 9 A structural schematic view of the air conditioner provided by the embodiment of the application is shown;

[0025] Figure 10 A front view of the air conditioner in Figure 9 is shown;

[0026] Figure 11 A side view of the air conditioner in Figure 9 is shown;

[0027] Figure 12 A rear view of the air conditioner in Figure 9 is shown;

[0028] Figure 13 Another side view of the air conditioner in Figure 9 is shown.

[0029] In the above drawings, the following reference signs are used:

[0030] 10, housing; 11, first air duct; 12, second air duct; 20, centrifugal fan blade; 30, fresh air duct; 40, dirty air duct; 50, first air baffle; 60, second air baffle; 70, filter screen; 80, outer shell; 81, indoor air inlet; 82, fresh air outlet; 83, fresh air inlet; 84, dirty air outlet; 90, heat exchange structure; 91, fan; 92, heat exchanger. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way limiting on the application or its applications or uses. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of the present application.

[0032] As shown in Figures 1 to 13 The embodiment of the present application provides a fresh air system, which comprises a housing 10, the housing 10 has an air inlet cavity and a first air duct 11, a second air duct 12, a first air inlet and a second air inlet which are all in communication with the air inlet cavity, wherein the first air inlet and the second air inlet are oppositely arranged, and the first air duct 11 and the second air duct 12 are both openably and closably arranged; a centrifugal fan blade 20 which is rotatably arranged in the air inlet cavity; a fresh air duct 30 which is in communication with the first air inlet in an on-off manner; a dirty air duct 40 which is in communication with the second air duct 12; and an indoor air duct which is in communication with the second air inlet in an on-off manner. The centrifugal fan blade 20 is a double centrifugal fan blade.

[0033] By the cooperation of the opening and closing of different air ducts, the outdoor fresh air can enter the indoor air and the indoor air can be discharged to the outdoor air, and the mixed heat exchange of the outdoor air and the indoor air can be realized. Moreover, the fresh air system can realize the above functions by using one centrifugal fan blade 20, so that the structure can be simplified and the cost can be reduced.

[0034] Specifically, the fresh air system has a fresh air inlet mode, a dirty air discharge mode and a fresh air inlet heat exchange mode. In the fresh air inlet mode, the fresh air duct 30 is opened, the first air duct 11 is opened, the second air duct 12 is closed, and the indoor air duct is closed; in the dirty air discharge mode, the indoor air duct is opened, the second air duct 12 is opened, the dirty air duct 40 is opened, the first air duct 11 is closed, and the fresh air duct 30 is closed; in the fresh air inlet heat exchange mode, the fresh air duct 30 is opened, the first air duct 11 is opened, the second air duct 12 is closed, and the indoor air duct is opened.

[0035] In the embodiment, the fresh air system further comprises a first wind blocking part 50 arranged in the first air duct 11, at least a part of the first wind blocking part 50 being movably arranged to open or close the first air duct 11; and a second wind blocking part 60 arranged in the first air duct 11, at least a part of the second wind blocking part 60 being movably arranged to open or close the second air duct 12. In this way, the opening and closing of the first air duct 11 and the second air duct 12 can be respectively realized by the first wind blocking part 50 and the second wind blocking part 60, so as to control the flow direction of the gas.

[0036] In the embodiment, the first wind blocking part 50 comprises a baffle rotatably arranged to open or close the second air duct 12; and a driving part drivingly connected with the baffle to drive the baffle to rotate. That is, the driving part drives the baffle to rotate, and the rotation of the baffle opens or closes the first air duct 11. The shape of the baffle matches the shape of the first air duct 11. The driving part is an electric motor.

[0037] Specifically, the extension directions of the first air duct 11 and the second air duct 12 are both perpendicular to the axial direction of the centrifugal fan blade 20, and the fresh air duct 30 extends along the axial direction of the centrifugal fan blade 20; and the dirty air duct 40 comprises a first pipe segment, a second pipe segment and a third pipe segment connected in sequence, wherein the first pipe segment is in communication with the second air duct 12, and the third pipe segment extends along the axial direction of the centrifugal fan blade 20. Through the above arrangement, the air duct arrangement and the guidance of the flow direction of the gas can be facilitated.

[0038] In the embodiment, the fresh air system further comprises a filter screen 70 arranged in the fresh air duct 30. The filter screen 70 can filter the air entering from the outdoor to avoid impurities entering the indoor.

[0039] Another embodiment of the present application provides an air conditioner comprising the above fresh air system. Through the cooperation of the opening and closing of different air ducts, the outdoor fresh air entering the indoor and the indoor air discharging to the outdoor can be realized, and the mixing and heat exchange of the outdoor air and the indoor air can be realized. Moreover, the above functions can be realized by using one centrifugal fan blade 20, so the structure can be simplified and the cost can be reduced. In this way, the air conditioner has the functions of replacing fresh air and discharging dirty air in addition to the functions of refrigeration and heating.

[0040] In the embodiment, the air conditioner further comprises a shell 80 and a heat exchange structure 90, wherein the heat exchange structure 90 and the fresh air system are both arranged in a cavity of the shell 80, and the fresh air system is located below the heat exchange structure 90. The heat exchange structure 90 is used for refrigeration or heating. Arranging the fresh air system below the heat exchange structure 90 can facilitate the arrangement of the structure. Moreover, in the embodiment, the air ducts of the heat exchange structure 90 and the fresh air system are independently arranged, and the two will not affect each other.

[0041] Specifically, the shell 80 has a front wall, a rear wall, and a first side wall and a second side wall between the front wall and the rear wall, the first side wall has the indoor air inlet 81, the second side wall has the fresh air outlet 82, and the rear wall has the fresh air inlet 83 and the exhaust air outlet 84, wherein the fresh air inlet 83 is communicated with the fresh air duct 30, the fresh air outlet 82 is communicated with the first air duct 11, the indoor air inlet 81 is communicated with the indoor air duct, and the exhaust air outlet 84 is communicated with the exhaust air duct 40. The area between the indoor air inlet 81 and the second air inlet forms the indoor air duct.

[0042] Further, the air conditioner further comprises a first air door for opening or closing the indoor air inlet 81, a second air door for opening or closing the fresh air inlet 83, and a third air door for opening or closing the exhaust air outlet 84. In this way, the air doors can be used to control the opening or closing of the corresponding air inlets and outlets, so as to realize the entry of outdoor fresh air into the room and the discharge of indoor air outside, and the mixing and heat exchange of outdoor air and indoor air.

[0043] In the embodiment, the heat exchange structure 90 comprises a fan 91 having upper and lower air outlets with selectable air outlet, and a heat exchanger 92 arranged above the fan 91.

[0044] The shell 80 has upper and lower air inlets, and the fan 91 is arranged in the cavity of the shell. The fan comprises a volute having an air inlet cavity and air inlets, upper and lower air outlets communicated with the air inlet cavity, the upper air outlet being communicated with the upper air inlet, and the lower air outlet being communicated with the lower air inlet.

[0045] Optionally, the volute and the shell have upper and lower air ducts, the two ends of the upper air duct are communicated with the upper air inlet and the air inlet respectively, and the two ends of the lower air duct are communicated with the lower air inlet and the air inlet respectively; the fan has upper and lower air outlet states; an upper air blocking mechanism is arranged in the cavity of the shell, at least a part of the upper air blocking mechanism is movably arranged to open or close the upper air duct; and a lower air blocking mechanism is arranged in the cavity of the shell, at least a part of the lower air blocking mechanism is movably arranged to open or close the lower air duct. In this way, the air inlet direction and the air outlet direction can be defined, and the air volume can be improved.

[0046] Optionally, a rotary volute tongue is rotatably arranged in the air inlet cavity to switch the fan to the upper air outlet state or the lower air outlet state. The rotary volute tongue has a first position for blocking the lower air outlet and avoiding the upper air outlet, and a second position for blocking the upper air outlet and avoiding the lower air outlet; wherein when the fan is in the upper air outlet state, the rotary volute tongue is in the first position, the upper air duct is closed, and the lower air duct is opened; and when the fan is in the lower air outlet state, the rotary volute tongue is in the second position, the upper air duct is opened, and the lower air duct is closed.

[0047] Optionally, the inner wall of the air inlet cavity has a guide groove, and the fan further comprises a guide structure arranged on the rotating volute tongue and located in the guide groove to move along the guide groove. In this way, the rotating volute tongue can be guided by the cooperation of the guide structure and the guide groove, so that the rotating volute tongue moves stably, the shaking is reduced, and the reliability is improved.

[0048] Optionally, the guide structure comprises: a first roller rotatably arranged on the rotating volute tongue, an axis of the first roller being parallel to a rotation center line of the rotating volute tongue, and the first roller abutting against a side wall of the guide groove; and a second roller rotatably arranged on the rotating volute tongue, an axis of the second roller being perpendicular to the rotation center line of the rotating volute tongue, and the second roller abutting against a bottom wall of the guide groove. By using the first roller and the second roller with different axes, the rotating volute tongue can be limited and guided in different directions, so that the rotating volute tongue moves stably. By using the first roller and the second roller, the rotating volute tongue is prevented from directly contacting the inner wall of the air inlet cavity, so that the frictional resistance is reduced and the movement is smooth.

[0049] Optionally, the rotating volute tongue comprises: an arc-shaped plate for plugging the upper air outlet or the lower air outlet, and a gap being formed between the arc-shaped plate and the inner wall of the air inlet cavity; and an arc-shaped blocking rib arranged on the arc-shaped plate and partially located in the guide groove. The gap formed between the arc-shaped plate and the inner wall of the air inlet cavity can facilitate the rotation of the rotating volute tongue and prevent the rotating volute tongue from being stuck. By using the arc-shaped blocking rib extending into the guide groove, the gap can be shielded, air leakage at the gap is avoided, and the sealing performance and the air volume of the fan are improved. Optionally, a gap is formed between the arc-shaped blocking rib and the inner wall of the air inlet cavity, so that the arc-shaped blocking rib is prevented from contacting the inner wall of the air inlet cavity to generate friction. Moreover, the arc-shaped blocking rib has an avoiding groove for avoiding the guide structure. By using the avoiding groove, the guide structure and the arc-shaped blocking rib are prevented from interfering with each other, and the arrangement of the guide structure is facilitated.

[0050] The above merely describes preferred embodiments of the present application but should not be used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall fall within the protection scope of the present application.

Claims

1. An air conditioner, characterized in that, The air conditioner includes a fresh air system, a housing (80) and a heat exchange structure (90). The heat exchange structure (90) and the fresh air system are both disposed in the cavity of the housing (80), and the fresh air system is located below the heat exchange structure (90). The outer casing (80) has an upper air vent and a lower air vent; The heat exchange structure (90) includes: a fan (91) disposed in the cavity of the outer shell (80); the fan (91) includes a volute, the volute having an air inlet cavity and an air outlet, an upper air outlet, and a lower air outlet all connected to the air inlet cavity, the upper air outlet being connected to the upper air outlet and the lower air outlet being connected to the lower air outlet; and a heat exchanger (92) disposed above the fan (91). There is an upper air duct and a lower air duct between the volute and the outer shell (80). The two ends of the upper air duct are respectively connected to the upper air outlet and the air inlet. The lower air duct is respectively connected to the lower air outlet and the air inlet. The fan (91) has an upper air outlet air outlet state and a lower air outlet air outlet state. An upper windshield mechanism is disposed within the cavity of the housing (80), and at least a portion of the upper windshield mechanism is movably disposed to open or close the upper air duct; a lower windshield mechanism is disposed within the cavity of the housing (80), and at least a portion of the lower windshield mechanism is movably disposed to open or close the lower air duct. A rotating volute is rotatably disposed within the air inlet cavity to switch the fan (91) to either the upper air outlet state or the lower air outlet state. The rotating volute has a first position that blocks the lower air outlet and avoids the upper air outlet, and a second position that blocks the upper air outlet and avoids the lower air outlet. When the fan (91) is in the upper air outlet state, the rotating volute is in the first position, the upper air duct is closed, and the lower air duct is open. When the fan is in the lower air outlet state, the rotating volute is in the second position, the upper air duct is open, and the lower air duct is closed. The fresh air system includes: a housing (10), the housing (10) having an air intake cavity and a first air duct (11), a second air duct (12), a first air inlet, and a second air inlet, all connected to the air intake cavity, wherein the first air inlet and the second air inlet are arranged opposite to each other, and the first air duct (11) and the second air duct (12) can be opened or closed; a centrifugal fan blade (20), rotatably disposed in the air intake cavity; a fresh air duct (30), the fresh air duct (30) being connected to the first air inlet; a sludge air duct (40), the sludge air duct (40) being connected to the second air duct (12); the sludge air duct (40) including a first pipe section, a second pipe section, and a third pipe section connected in sequence, wherein the first pipe section is connected to the second air duct (12), and the third pipe section extends along the axial direction of the centrifugal fan blade (20); and an indoor air duct, the indoor air duct being connected to the second air inlet. The inner wall of the air inlet cavity has a guide groove, and the fan also includes a guide structure. The guide structure is disposed on the rotating volute and is located within the guide groove to move along the guide groove. The guide structure includes: a first roller rotatably disposed on the rotating volute, the axis of the first roller being parallel to the rotation center line of the rotating volute, and the first roller abutting against the side wall of the guide groove; a second roller rotatably disposed on the rotating volute, the axis of the second roller being perpendicular to the rotation center line of the rotating volute, and the second roller abutting against the bottom wall of the guide groove; the rotating volute includes: an arc-shaped plate and an arc-shaped baffle. The arc-shaped plate is used to block the upper air outlet or the lower air outlet, and there is a gap between the arc-shaped plate and the inner wall of the air inlet cavity; the arc-shaped baffle is disposed on the arc-shaped plate, and a portion of the arc-shaped baffle is located within the guide groove.

2. The air conditioner according to claim 1, characterized in that, The fresh air system also includes: A first windbreak (50) is disposed within the first air duct (11), and at least a portion of the first windbreak (50) is movably disposed to open or close the first air duct (11). A second windbreak (60) is disposed within the second air duct (12), and at least a portion of the second windbreak (60) is movably disposed to open or close the second air duct (12).

3. The air conditioner according to claim 2, characterized in that, The first windbreak (50) includes: A baffle, which is rotatably configured to open or close the first air duct (11). The drive unit is connected to the baffle to drive the baffle to rotate.

4. The air conditioner according to claim 1, characterized in that, The first air duct (11) and the second air duct (12) extend in directions perpendicular to the axial direction of the centrifugal fan (20), and the fresh air duct (30) extends along the axial direction of the centrifugal fan (20).

5. The air conditioner according to claim 1, characterized in that, The fresh air system also includes: A filter screen (70) is disposed inside the fresh air duct (30).

6. The air conditioner according to claim 1, characterized in that, The outer casing (80) has a front wall, a rear wall, and a first side wall and a second side wall located between the front wall and the rear wall. The first side wall has an indoor air inlet (81), the second side wall has a fresh air outlet (82), and the rear wall has a fresh air inlet (83) and a stale air outlet (84). The fresh air inlet (83) is connected to the fresh air duct (30), the fresh air outlet (82) is connected to the first duct (11), the indoor air inlet (81) is connected to the indoor air duct, and the stale air outlet (84) is connected to the stale air duct (40).

7. The air conditioner according to claim 6, characterized in that, The air conditioner also includes: The first air damper is used to open or close the indoor air inlet (81). The second air damper is used to open or close the fresh air inlet (83). The third air damper is used to open or close the sewage air outlet (84).

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