Fresh air device and air conditioner having the same

Abstract

The present invention provides a fresh air device and an air conditioner having the same. The fresh air device includes a centrifugal fan and a fresh air duct connected to the outside of the room. The fresh air device also includes a volute assembly having a first air inlet channel, a second air inlet channel, and a fan mounting cavity for mounting the centrifugal fan, wherein the first air inlet channel and the second air inlet channel are both configured to communicate with the fresh air duct. The fan mounting cavity has a first air inlet area corresponding to the first air inlet of the centrifugal fan and a second air inlet area corresponding to the second air inlet of the centrifugal fan. The first air inlet channel communicates with the first air inlet area, and the second air inlet channel communicates with the second air inlet area. The present invention solves the problem of small fresh air output in prior art air conditioners with fresh air functions.

Description

Technical Field

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

[0002] Air conditioners, as a household appliance, are increasingly used in modern homes. Generally speaking, doors and windows need to be closed when the air conditioner is turned on. Over time, this can lead to poor indoor air quality and reduced oxygen levels, which can affect user health.

[0003] Therefore, a fresh air system is set up to introduce outdoor air into the room, so that indoor and outdoor air circulation can be achieved through the fresh air system without opening windows, thereby alleviating the feeling of stuffiness.

[0004] However, when the fresh air function of traditional air conditioners is turned on, the fresh air volume is often insufficient and user satisfaction is low. In this case, it is necessary to increase the fresh air volume to improve the user experience. Summary of the Invention

[0005] The main purpose of the present invention is to provide a fresh air device and an air conditioner having the same, so as to solve the problem of small fresh air output volume of air conditioners with fresh air function in the prior art.

[0006] In order to achieve the above-mentioned purpose, according to one aspect of the present invention, a fresh air device is provided, including a centrifugal fan and a fresh air duct connected to the outdoors, the fresh air device also includes: a volute assembly, the volute assembly has a first air inlet channel, a second air inlet channel and a fan installation cavity for installing the centrifugal fan, the first air inlet channel and the second air inlet channel are both used to communicate with the fresh air duct; wherein, the fan installation cavity has a first air inlet area corresponding to the first air inlet of the centrifugal fan and a second air inlet area corresponding to the second air inlet of the centrifugal fan; the first air inlet channel is connected to the first air inlet area, and the second air inlet channel is connected to the second air inlet area.

[0007] Furthermore, the volute assembly also includes a diversion chamber, and the fresh air duct is connected to the diversion chamber; the diversion chamber has a main diversion hole and an auxiliary diversion hole, the main diversion hole is connected to the first air inlet channel, and the auxiliary diversion hole is connected to the second air inlet channel.

[0008] Furthermore, there are multiple second air inlet channels and multiple auxiliary diversion holes, and the multiple second air inlet channels are connected to the multiple auxiliary diversion holes in a one-to-one correspondence.

[0009] Furthermore, the diverter cavity is rectangular, and there are two auxiliary diverter holes, which are distributed on both sides of the main diverter hole along the diagonal direction of the diverter cavity.

[0010] Furthermore, the volute assembly includes: a first volute component and a second volute component, the first volute component and the second volute component are connected to enclose at least a portion of the fan installation cavity, and the diversion cavity is arranged on one side of the first volute component; wherein the first air inlet channel is arranged on the first volute component; and a partial channel section of the second air inlet channel is arranged on the first volute component and the second volute component.

[0011] Furthermore, the fresh air device also includes: a fresh air cover, the fresh air cover and the first volute component enclose a diversion chamber, the fresh air duct is installed on the fresh air cover and connected to the diversion chamber through the fresh air hole of the fresh air cover; wherein the main diversion hole and the auxiliary diversion hole are both arranged on the first volute component.

[0012] Furthermore, the volute assembly also includes: a third volute component, which is arranged on a side of the second volute component away from the first volute component and is spliced ​​with the second volute component; wherein the first volute component, the second volute component and the third volute component together form a fan installation cavity, the second air inlet channel extends from the first volute component to the third volute component, and the second air inlet channel is connected to the cavity portion of the third volute component for forming the fan installation cavity.

[0013] Furthermore, along the axial direction of the centrifugal fan, the centrifugal fan is divided into a first fan section and a second fan section; the fan installation cavity has a first cavity section for installing the first fan section and a second cavity section for installing the second fan section; wherein, the first volute component and the second volute component form the first cavity section, and the second volute component and the third volute component form the second cavity section; the first air inlet area is arranged on a side of the first cavity section away from the second cavity section, and the second air inlet area is arranged on a side of the second air inlet area away from the second cavity section.

[0014] Furthermore, an air inlet protrusion is provided on the second volute component, and the air inlet protrusion has an air inlet through hole for forming a second air inlet channel. The air inlet protrusion abuts against the first volute component, and the air inlet through hole is communicated with the auxiliary diversion hole.

[0015] Furthermore, the third volute component has a concave cavity portion for forming a fan mounting cavity, and a first air duct section and a second air duct section for forming a second air inlet channel, the first air duct section is connected to the air inlet through-hole, one end of the second air duct section is connected to the first air duct section, and the other end of the second air duct section is connected to the concave cavity portion, at least part of the first air duct section extends along the axial direction of the centrifugal fan, and at least part of the second air duct section extends along the radial direction of the centrifugal fan.

[0016] Furthermore, the main diversion hole is circular, and the auxiliary diversion hole includes a first hole segment and a second hole segment spliced ​​together, and the second hole segment is arranged on the side of the first hole segment away from the main diversion hole, wherein the second hole segment is arc-shaped and the first hole segment is rectangular or trapezoidal.

[0017] Furthermore, the centrifugal fan is divided into a first fan part and a second fan part, and the volute assembly also includes a first fresh air outlet and a second fresh air outlet distributed at intervals, the first fresh air outlet is connected to the outer peripheral surface of the first fan part, and the second fresh air outlet is connected to the outer peripheral surface of the second fan part.

[0018] According to another aspect of the present invention, an air conditioner is provided, comprising a fresh air device.

[0019] Applying the technical solution of the present invention, the fresh air device of the present invention includes a centrifugal fan, a fresh air duct connected to the outside and a volute assembly, the volute assembly has a first air inlet channel, a second air inlet channel and a fan installation cavity for installing the centrifugal fan, the first air inlet channel and the second air inlet channel are both used to communicate with the fresh air duct; wherein, the fan installation cavity has a first air inlet area corresponding to the first air inlet of the centrifugal fan and a second air inlet area corresponding to the second air inlet of the centrifugal fan; the first air inlet channel is connected to the first air inlet area, and the second air inlet channel is connected to the second air inlet area, so that the airflow blown out of the fresh air duct flows through the first air inlet channel and then , enters the first air inlet of the centrifugal fan through the first air inlet area, and the air flow blown out of the fresh air duct flows through the second air inlet channel, and then enters the second air inlet of the centrifugal fan through the second air inlet area. In this way, the fresh air device has different air inlet channels. When the centrifugal fan blows out the fresh air airflows in different air inlet channels together, the air output will be increased, which solves the problem of small fresh air output volume in the prior art. In addition, the fresh air device of the present application does not need to expand the reserved holes in the walls of the home, which solves the problem in the prior art of increasing the pipe diameter of the fresh air components, which makes the fresh air system inconvenient to install, and improves the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings, which constitute part of this application, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an undue limitation of the present invention. In the accompanying drawings:

[0021] Figure 1 A cross-sectional view showing an embodiment of a fresh air device according to the present invention is shown;

[0022] Figure 2 An exploded view showing a first perspective of an embodiment of a fresh air device according to the present invention;

[0023] Figure 3 An exploded view showing a second perspective of an embodiment of a fresh air device according to the present invention;

[0024] Figure 4 It shows an overall assembly diagram of an embodiment of a fresh air device according to the present invention;

[0025] Figure 5A schematic diagram showing the positions of the main diverter hole and the auxiliary diverter hole on the first volute component of an embodiment of a fresh air device according to the present invention is shown;

[0026] Figure 6 A schematic structural diagram of a volute assembly from a first perspective of an embodiment of a fresh air device according to the present invention is shown;

[0027] Figure 7 A schematic structural diagram of a volute assembly from a second perspective of an embodiment of a fresh air device according to the present invention is shown.

[0028] The above drawings include the following reference numerals:

[0029] 100, centrifugal fan; 1001, first fan unit; 1002, second fan unit; 1003, drive motor; 300, motor mounting assembly; 200, fresh air duct; 10, volute assembly; 101, first air inlet channel; 102, second air inlet channel; 1021, first air duct section; 1022, second air duct section; 110, fan mounting cavity; 111, first air inlet area; 112, second air inlet area Area; 120, diversion chamber; 121, main diversion hole; 122, auxiliary diversion hole; 1221, first hole section; 1222, second hole section; 11, first volute component; 12, second volute component; 20, fresh air cover; 21, fresh air hole; 13, third volute component; 123, raised portion; 124, air inlet hole; 130, concave cavity; 201, first fresh air outlet; 202, second fresh air outlet. DETAILED DESCRIPTION

[0030] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0031] At present, the traditional method of increasing the fresh air volume is to increase the diameter of the fresh air component pipe, which requires expanding the reserved holes in the walls of the user's home, causing great damage to the walls, resulting in a poor user experience. Therefore, this method of increasing the diameter of the fresh air component pipe makes the fresh air system inconvenient to install.

[0032] Please refer to Figures 1 to 7The present invention provides a fresh air device, including a centrifugal fan 100 and a fresh air duct 200 connected to the outdoors, the fresh air device also includes: a volute assembly 10, the volute assembly 10 has a first air inlet channel 101, a second air inlet channel 102 and a fan installation cavity 110 for installing the centrifugal fan 100, the first air inlet channel 101 and the second air inlet channel 102 are both used to communicate with the fresh air duct 200; wherein, the fan installation cavity 110 has a first air inlet area 111 corresponding to the first air inlet of the centrifugal fan 100 and a second air inlet area 112 corresponding to the second air inlet of the centrifugal fan 100; the first air inlet channel 101 is connected to the first air inlet area 111, and the second air inlet channel 102 is connected to the second air inlet area 112.

[0033] The fresh air device of the present invention includes a centrifugal fan 100, a fresh air duct 200 connected to the outside and a volute assembly 10, the volute assembly 10 has a first air inlet channel 101, a second air inlet channel 102 and a fan installation cavity 110 for installing the centrifugal fan 100, the first air inlet channel 101 and the second air inlet channel 102 are both used to communicate with the fresh air duct 200; wherein the fan installation cavity 110 has a first air inlet area 111 corresponding to the first air inlet of the centrifugal fan 100 and a second air inlet area 112 corresponding to the second air inlet of the centrifugal fan 100; the first air inlet channel 101 is connected to the first air inlet area 111, and the second air inlet channel 102 is connected to the second air inlet area 112, so that the fresh air duct 200 blows After the outgoing air flow flows through the first air inlet channel 101, it enters the first air inlet of the centrifugal fan 100 through the first air inlet area 111. After the air flow blown out by the fresh air duct 200 flows through the second air inlet channel 102, it enters the second air inlet of the centrifugal fan 100 through the second air inlet area 112. In this way, the fresh air device has different air inlet channels. When the centrifugal fan 100 blows out the fresh air airflows in different air inlet channels together, the air output will be increased, which solves the problem of small fresh air output in the prior art. In addition, the fresh air device of the present application does not need to expand the reserved holes in the walls of the home, which solves the problem in the prior art of increasing the pipe diameter of the fresh air components, which makes the fresh air system inconvenient to install, and improves the user's experience.

[0034] Specifically, the centrifugal fan 100 is a double-suction centrifugal fan, which adopts the double-inlet and double-outlet characteristics of the double-suction centrifugal fan to avoid the phenomenon of fresh air backflow at the volute tongue caused by directly increasing the air intake volume of the fan, thereby further increasing the fresh air volume.

[0035] Specifically, the volute assembly 10 also includes a diversion chamber 120, and the fresh air duct 200 is connected to the diversion chamber 120; the diversion chamber 120 has a main diversion hole 121 and an auxiliary diversion hole 122, the main diversion hole 121 is connected to the first air inlet channel 101, and the auxiliary diversion hole 122 is connected to the second air inlet channel 102.

[0036] Optionally, there are multiple second air inlet channels 102 and multiple auxiliary diversion holes 122 , and the multiple second air inlet channels 102 are connected to the multiple auxiliary diversion holes 122 in a one-to-one correspondence.

[0037] In an embodiment of the present invention, Figure 5 and Figure 6 As shown, the diverter cavity 120 is rectangular, and there are two auxiliary diverter holes 122 . The two auxiliary diverter holes 122 are distributed on both sides of the main diverter hole 121 along the diagonal direction of the diverter cavity 120 .

[0038] like Figure 2 and Figure 3 As shown, the volute assembly 10 includes: a first volute component 11 and a second volute component 12, the first volute component 11 and the second volute component 12 are connected to enclose at least a portion of the fan installation cavity 110, and the diversion cavity 120 is arranged on one side of the first volute component 11; wherein, the first air inlet channel 101 is arranged on the first volute component 11; and a partial channel section of the second air inlet channel 102 is arranged on the first volute component 11 and the second volute component 12.

[0039] Specifically, the first air inlet channel 101 is a portion between the main diversion hole 121 and the first air inlet of the centrifugal fan 100 .

[0040] like Figure 2 、 Figure 3 and Figure 4 As shown, the fresh air device also includes: a fresh air cover 20, the fresh air cover 20 and the first volute component 11 enclose a diversion chamber 120, the fresh air duct 200 is installed on the fresh air cover 20 and is connected to the diversion chamber 120 through the fresh air hole 21 of the fresh air cover 20; wherein, the main diversion hole 121 and the auxiliary diversion hole 122 are both arranged on the first volute component 11.

[0041] Specifically, the volute assembly 10 also includes: a third volute component 13, which is arranged on a side of the second volute component 12 away from the first volute component 11 and is spliced ​​with the second volute component 12; wherein, the first volute component 11, the second volute component 12 and the third volute component 13 together form a fan installation cavity 110, and the second air inlet channel 102 extends from the first volute component 11 to the third volute component 13, and the second air inlet channel 102 is connected to the cavity portion of the third volute component 13 for forming the fan installation cavity 110.

[0042] like Figure 1As shown, along the axial direction of the centrifugal fan 100, the centrifugal fan 100 is divided into a first fan section 1001 and a second fan section 1002; the fan installation cavity 110 has a first cavity section for installing the first fan section 1001 and a second cavity section for installing the second fan section 1002; wherein, the first volute component 11 and the second volute component 12 form the first cavity section, and the second volute component 12 and the third volute component 13 form the second cavity section; the first air inlet area 111 is arranged on the side of the first cavity section away from the second cavity section, and the second air inlet area 112 is arranged on the side of the second air inlet area 112 away from the second cavity section. In this way, air inlet areas are provided on both sides of the distribution direction of the first fan section 1001 and the second fan section 1002 by the first volute component 11, the second volute component 12 and the third volute component 13, thereby improving the utilization rate of fresh air.

[0043] In an embodiment of the present invention, the fresh air device also includes a drive motor 1003 and a motor mounting component 300 for mounting the drive motor 1003. The motor mounting component 300 is mounted on the side wall of the third volute component 13 away from the second volute component 12. The drive motor 1003 is mounted on the inner side of the motor mounting component 300. The drive motor 1003 is connected to the centrifugal fan 100 to drive the centrifugal fan 100 to rotate.

[0044] Specifically, the driving motor 1003 is drivingly connected to both the first fan unit 1001 and the second fan unit 1002 to drive the first fan unit 1001 and the second fan unit 1002 to rotate.

[0045] Specifically, an air inlet protrusion 123 is provided on the second volute component 12 , and the air inlet protrusion 123 has an air inlet hole 124 for forming the second air inlet channel 102 . The air inlet protrusion 123 abuts against the first volute component 11 , and the air inlet hole 124 is connected to the auxiliary diversion hole 122 .

[0046] Specifically, the air inlet protrusion 123 is provided corresponding to the auxiliary diversion hole 122 , the air inlet protrusion 123 is inserted into the auxiliary diversion hole 122 , and the outer side wall of the air inlet protrusion 123 is in contact with the inner side wall of the auxiliary diversion hole 122 .

[0047] Specifically, the third volute component 13 has a concave cavity portion 130 for forming a fan mounting cavity 110, and a first air duct section 1021 and a second air duct section 1022 for forming a second air inlet channel 102. The first air duct section 1021 is connected to the air inlet through hole 124, one end of the second air duct section 1022 is connected to the first air duct section 1021, and the other end of the second air duct section 1022 is connected to the concave cavity portion 130. At least a portion of the first air duct section 1021 extends along the axial direction of the centrifugal fan 100, and at least a portion of the second air duct section 1022 extends along the radial direction of the centrifugal fan 100.

[0048] In an embodiment of the present invention, the main diversion hole 121 is circular, and the auxiliary diversion hole 122 includes a first hole segment 1221 and a second hole segment 1222 spliced ​​together, and the second hole segment 1222 is arranged on the side of the first hole segment 1221 away from the main diversion hole 121, wherein the second hole segment 1222 is arc-shaped and the first hole segment 1221 is rectangular or trapezoidal.

[0049] In the embodiment of the present invention, the inner sidewall of the first hole section 1221 away from the second hole section 1222 is a curved surface.

[0050] Specifically, the volute assembly 10 includes a fresh air outlet. After the fresh air flows through the first air inlet channel 101 and the second air inlet channel 102 and flows to the centrifugal fan 100, the centrifugal fan 100 drives the fresh air to be blown out from the fresh air outlet.

[0051] Optionally, the centrifugal fan 100 is divided into a first fan section 1001 and a second fan section 1002, and the volute assembly 10 also includes a first fresh air outlet 201 and a second fresh air outlet 202 distributed at intervals. The first fresh air outlet 201 is connected to the outer peripheral surface of the first fan section 1001, and the second fresh air outlet 202 is connected to the outer peripheral surface of the second fan section 1002, so that the fresh air flow in the first air inlet channel 101 and the second air inlet channel 102 is blown out through different fresh air outlets, and the fresh air generated by the double-suction centrifugal fan blades is thrown out from two non-communicating fresh air outlets and converges together, thereby greatly increasing the fresh air volume.

[0052] Specifically, the first fresh air outlet 201 is formed between the first volute component 11 and the second volute component 12, and the second fresh air outlet 202 is formed between the second volute component 12 and the third volute component 13; wherein, the first fan unit 1001 is arranged corresponding to the first fresh air outlet 201, and the second fan unit 1002 is arranged corresponding to the second fresh air outlet 202.

[0053] In summary, the fresh air device of the present application can take in air through the first air inlet channel 101 and the second air inlet channel 102 respectively, and guide the fresh air flow to different air inlets of the centrifugal fan through the first air inlet channel 101 and the second air inlet channel 102 and then discharge the air. At this time, the fresh air outlet can be 1 or 2. When there is 1 fresh air outlet, the area of ​​the fresh air outlet becomes larger accordingly to adapt to the structure of the air inlet channel of the volute assembly of the present application, thereby expanding the fresh air outlet volume; when there are two fresh air outlets, the first fresh air outlet The air outlet 201 is connected to the first air inlet channel 101, and the second fresh air outlet 202 is connected to the second air inlet channel 102. The air discharged from different fresh air outlets converges together, thereby increasing the fresh air output. In addition, the fresh air device of the present application can drive the two fan parts of the centrifugal fan 100 to rotate through a drive motor 1003, and the fresh air volume can be increased without increasing the speed of the drive motor 1003, which solves the problem of high noise of the fresh air device in the prior art and further improves the user experience.

[0054] The present invention also provides an air conditioner, comprising the above-mentioned fresh air device.

[0055] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0056] The fresh air device of the present invention includes a centrifugal fan 100, a fresh air duct 200 connected to the outside and a volute assembly 10, the volute assembly 10 has a first air inlet channel 101, a second air inlet channel 102 and a fan installation cavity 110 for installing the centrifugal fan 100, the first air inlet channel 101 and the second air inlet channel 102 are both used to communicate with the fresh air duct 200; wherein the fan installation cavity 110 has a first air inlet area 111 corresponding to the first air inlet of the centrifugal fan 100 and a second air inlet area 112 corresponding to the second air inlet of the centrifugal fan 100; the first air inlet channel 101 is connected to the first air inlet area 111, and the second air inlet channel 102 is connected to the second air inlet area 112, so that the fresh air duct 200 blows After the outgoing air flow flows through the first air inlet channel 101, it enters the first air inlet of the centrifugal fan 100 through the first air inlet area 111. After the air flow blown out by the fresh air duct 200 flows through the second air inlet channel 102, it enters the second air inlet of the centrifugal fan 100 through the second air inlet area 112. In this way, the fresh air device has different air inlet channels. When the centrifugal fan 100 blows out the fresh air airflows in different air inlet channels together, the air output will be increased, which solves the problem of small fresh air output in the prior art. In addition, the fresh air device of the present application does not need to expand the reserved holes in the walls of the home, which solves the problem in the prior art of increasing the pipe diameter of the fresh air components, which makes the fresh air system inconvenient to install, and improves the user's experience.

[0057] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A fresh air device, comprising a centrifugal fan (100) and a fresh air duct (200) connected to the outside, characterized in that: The fresh air device also includes: A volute assembly (10), the volute assembly (10) having a first air inlet channel (101), a second air inlet channel (102), and a fan installation cavity (110) for installing the centrifugal fan (100), the first air inlet channel (101) and the second air inlet channel (102) both being used to communicate with the fresh air duct (200); The fan installation cavity (110) has a first air inlet area (111) corresponding to the first air inlet of the centrifugal fan (100) and a second air inlet area (112) corresponding to the second air inlet of the centrifugal fan (100); the first air inlet channel (101) is in communication with the first air inlet area (111), and the second air inlet channel (102) is in communication with the second air inlet area (112); The volute assembly (10) further comprises a diversion chamber (120), the fresh air pipe (200) being in communication with the diversion chamber (120); the diversion chamber (120) having a main diversion hole (121) and an auxiliary diversion hole (122), the main diversion hole (121) being in communication with the first air inlet channel (101), and the auxiliary diversion hole (122) being in communication with the second air inlet channel (102); There are multiple second air inlet channels (102) and multiple auxiliary diversion holes (122), and the multiple second air inlet channels (102) are connected to the multiple auxiliary diversion holes (122) in a one-to-one correspondence; The diversion cavity (120) is rectangular, and there are two auxiliary diversion holes (122). The two auxiliary diversion holes (122) are distributed on both sides of the main diversion hole (121) along the diagonal direction of the diversion cavity (120).

2. The fresh air device according to claim 1, characterized in that: The volute assembly (10) comprises: a first volute component (11) and a second volute component (12), wherein the first volute component (11) and the second volute component (12) are butted together to enclose at least a portion of the fan installation cavity (110), and the diversion cavity (120) is provided on one side of the first volute component (11); The first air inlet channel (101) is provided on the first volute component (11); and a partial channel section of the second air inlet channel (102) is provided on the first volute component (11) and the second volute component (12).

3. The fresh air device according to claim 2, characterized in that: The fresh air device also includes: A fresh air cover (20), the fresh air cover (20) and the first volute component (11) enclose the diversion chamber (120), the fresh air pipe (200) is installed on the fresh air cover (20) and communicates with the diversion chamber (120) through the fresh air hole (21) of the fresh air cover (20); Wherein, the main diverter hole (121) and the auxiliary diverter hole (122) are both provided on the first volute component (11).

4. The fresh air device according to claim 2, characterized in that: The volute assembly (10) further includes: a third volute component (13), the third volute component (13) being arranged on a side of the second volute component (12) away from the first volute component (11) and being spliced ​​with the second volute component (12); wherein the first volute component (11), the second volute component (12) and the third volute component (13) together enclose the fan installation cavity (110), the second air inlet channel (102) extends from the first volute component (11) to the third volute component (13), and the second air inlet channel (102) is communicated with the cavity portion of the third volute component (13) for forming the fan installation cavity (110).

5. The fresh air device according to claim 4, characterized in that: Along the axial direction of the centrifugal fan (100), the centrifugal fan (100) is divided into a first fan section (1001) and a second fan section (1002); the fan installation cavity (110) has a first cavity section for installing the first fan section (1001) and a second cavity section for installing the second fan section (1002); The first volute component (11) and the second volute component (12) enclose the first cavity portion, and the second volute component (12) and the third volute component (13) enclose the second cavity portion; the first air inlet area (111) is arranged on a side of the first cavity portion away from the second cavity portion, and the second air inlet area (112) is arranged on a side of the second air inlet area (112) away from the second cavity portion.

6. The fresh air device according to claim 4, characterized in that: An air inlet protrusion (123) is provided on the second volute component (12), and the air inlet protrusion (123) has an air inlet through hole (124) for forming the second air inlet channel (102). The air inlet protrusion (123) abuts against the first volute component (11), and the air inlet through hole (124) is communicated with the auxiliary diversion hole (122).

7. The fresh air device according to claim 6, characterized in that: The third volute component (13) has a concave cavity portion (130) for forming the fan installation cavity (110), and is used to form a first air duct section (1021) and a second air duct section (1022) of the second air inlet channel (102), wherein the first air duct section (1021) is communicated with the air inlet through hole (124), one end of the second air duct section (1022) is communicated with the first air duct section (1021), and the other end of the second air duct section (1022) is communicated with the concave cavity portion (130), at least a portion of the first air duct section (1021) extends along the axial direction of the centrifugal fan (100), and at least a portion of the second air duct section (1022) extends along the radial direction of the centrifugal fan (100).

8. The fresh air device according to claim 1, characterized in that: The main diverter hole (121) is circular, and the auxiliary diverter hole (122) comprises a first hole segment (1221) and a second hole segment (1222) which are spliced ​​together, and the second hole segment (1222) is arranged on a side of the first hole segment (1221) away from the main diverter hole (121), wherein the second hole segment (1222) is arc-shaped, and the first hole segment (1221) is rectangular or trapezoidal.

9. The fresh air device according to claim 1, characterized in that: The centrifugal fan (100) is divided into a first fan section (1001) and a second fan section (1002), and the volute assembly (10) further comprises a first fresh air outlet (201) and a second fresh air outlet (202) that are spaced apart, the first fresh air outlet (201) being in communication with the outer peripheral surface of the first fan section (1001), and the second fresh air outlet (202) being in communication with the outer peripheral surface of the second fan section (1002).

10. An air conditioner, characterized in that: The invention comprises the fresh air device according to any one of claims 1 to 9.

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