Fresh air device and electric appliance

Abstract

The invention discloses a fresh air device and an electric appliance, and relates to the technical field of air exchange. The fresh air device comprises a fresh air shell, a centrifugal fan, an air inlet valve and a valve assembly, the fresh air shell comprises at least two air outlet channels, and the at least two air outlet channels are downwards distributed at intervals from the upper area of the fresh air shell. The centrifugal fan is installed in the fresh air shell so that the interior of the fresh air shell can be divided into a first air inlet cavity and a second air inlet cavity in the radial direction of the centrifugal fan, and an air outlet of the centrifugal fan communicates with air channels of the air outlet channels correspondingly. The air inlet valve is arranged in the second air inlet cavity so as to control airflow of the second air inlet cavity to enter the centrifugal fan. The valve assembly is close to the air outlet of the centrifugal fan so as to control opening and closing of the at least two air outlet channels. Air enters from the two axial sides of the centrifugal fan, and the air outlet channels are distributed in different positions of the fresh air shell, so that the air outlet amount and the air outlet direction are adjusted. Therefore, the air outlet modes of the fresh air device are enriched, and the use requirements of users are met.

Description

Technical Field

[0001] The present invention relates to the technical field of ventilation, and in particular to a fresh air device and an electrical appliance. Background Art

[0002] To meet users' ever-higher demands for indoor air quality, fresh air devices have become a crucial component of some electrical appliances. For example, fresh air devices in appliances like air conditioners often utilize a rectangular air outlet design, directly connecting the outlet of the centrifugal fan volute to the outlet. This simple structure minimizes air flow resistance, resulting in high airflow with minimal air loss.

[0003] However, the method of directly connecting the centrifugal fan volute to the air outlet results in a relatively single air outlet pattern, which is difficult to meet the diverse usage needs of users. Summary of the Invention

[0004] In view of the problem that the existing air outlet mode is single and difficult to meet the diverse usage needs of users, the present invention is proposed to provide a fresh air device that overcomes the above problem or at least partially solves the above problem.

[0005] According to a first aspect of the present invention, a fresh air device is provided, comprising:

[0006] A fresh air housing, the fresh air housing comprising at least two air outlet channels, wherein the at least two air outlet channels are spaced apart and distributed downward from an upper region of the fresh air housing;

[0007] a centrifugal fan installed inside the fresh air housing to divide the interior of the fresh air housing into a first air inlet chamber and a second air inlet chamber along the radial direction of the centrifugal fan, wherein the air outlet of the centrifugal fan is respectively connected to the air path of each of the air outlet channels;

[0008] an air inlet valve, the air inlet valve being arranged in the second air inlet cavity to control the airflow of the second air inlet cavity to enter the centrifugal fan;

[0009] A valve assembly is located near the air outlet of the centrifugal fan to control the opening and closing of at least two air outlet channels.

[0010] An optional invention content, the fresh air device also includes a connecting pipe, an air supply pipe and a rotating drive assembly, the connecting pipe is connected to one of the air outlet channels and is fixedly connected to the fresh air shell; at least two air outlet holes are provided on the air supply pipe, and a rotating connection is formed with the connecting pipe; the rotating drive assembly is transmission-connected to the air supply pipe, and the rotating drive assembly drives the air supply pipe to rotate when working, so as to be used for windless air outlet.

[0011] An optional invention content is that a first air inlet channel connected to the first air inlet chamber air path is also provided in the fresh air shell, wherein the width of the first air inlet channel gradually narrows from the direction away from the centrifugal fan to the direction close to the centrifugal fan.

[0012] An optional invention content is that a second air inlet channel connected to the air path of the second air inlet cavity is further provided in the fresh air shell, and a first filter is also installed in the first air inlet channel; and / or a second filter is also installed in the second air inlet channel.

[0013] An optional invention content, the fresh air device also includes a first air inlet duct and a second air inlet duct, the first air inlet duct is connected to the first air inlet channel air path, and the end of the first air inlet duct away from the first air inlet channel is connected to the outdoor outside; one end of the second air inlet duct is connected to the second air inlet channel air path, and the other end is connected to the side of the first air inlet duct, wherein the diameter of the second air inlet duct is smaller than the diameter of the first air inlet duct.

[0014] An optional invention content, the rotary drive assembly includes a rotary motion output device and a transmission gear set, the rotary motion output device is fixedly connected to the fresh air housing; the power input gear of the transmission gear set is coaxially fixed with the output shaft of the rotary motion output device to drive the transmission gear set to rotate when the rotary motion output device rotates, wherein the air supply pipe is coaxially fixed with the power output gear of the transmission gear set to drive the air supply pipe to rotate when the transmission gear set rotates.

[0015] An optional invention content is that the upper area of the fresh air shell is distributed downward in sequence: a first air outlet channel, a second air outlet channel and a third air outlet channel, the air supply pipe is connected to the first air outlet channel air path; the second air outlet channel is distributed along the radial direction of the centrifugal fan.

[0016] An optional invention content, the valve assembly includes a first air outlet valve, a second air outlet valve and a third air outlet valve, the first air outlet valve is arranged in the first air outlet channel to control the opening and closing of the first air outlet channel; the second air outlet valve is arranged in the second air outlet channel to control the opening and closing of the second air outlet channel; the third air outlet valve is arranged in the third air outlet channel to control the opening and closing of the third air outlet channel.

[0017] Based on the second aspect of the present invention, an electrical appliance is further provided, which includes the fresh air device as described in any one of the above inventions, and the electrical appliance includes one of the following: an air conditioner, a fresh air ventilator, and an air environment machine.

[0018] An optional invention content, when the electrical appliance includes a heat exchange system, the electrical appliance also includes a heat exchange shell for installing the heat exchange system, the heat exchange shell is fixedly connected to the fresh air shell, and the fresh air device also includes a temperature regulating plate, the temperature regulating plate is located in the first air inlet cavity and / or the second air inlet cavity of the fresh air device, and extends into the heat exchange shell to transfer the cold or heat generated by the operation of the heat exchange system to the first air inlet cavity and / or the second air inlet cavity.

[0019] An optional invention is that, when the first air inlet cavity is installed with the temperature regulating plate, a first drainage channel is provided on the bottom wall of the first air inlet cavity, and the first drainage channel is connected to the water receiving part of the electrical appliance; and / or,

[0020] When the temperature regulating plate is installed in the second air inlet cavity, a second drainage channel is provided on the bottom wall of the second air inlet cavity, and the second drainage channel is connected to the water receiving part of the electrical appliance.

[0021] An optional invention content is that the bottom wall of the second air inlet cavity gradually slopes downward from a direction away from the heat exchange system to a direction close to the heat exchange system.

[0022] In an optional invention, the fresh air device further includes an anti-absorption baffle, which is arranged between the temperature regulating plate provided in the first air inlet chamber and the centrifugal fan to prevent condensation generated by the temperature regulating plate from being adsorbed by the centrifugal fan; and / or,

[0023] The anti-absorption baffle is arranged between the temperature regulating plate arranged in the second air inlet cavity and the centrifugal fan, so as to prevent condensation generated by the temperature regulating plate from being absorbed by the centrifugal fan.

[0024] Compared with the prior art, the present invention includes a fresh air housing, a centrifugal fan, an air inlet valve, and a valve assembly. The fresh air housing includes at least two air outlet channels, wherein at least two of the air outlet channels are spaced apart and distributed downward from the upper area of the fresh air housing. The centrifugal fan is installed inside the fresh air housing to divide the interior of the fresh air housing into a first air inlet chamber and a second air inlet chamber along the radial direction of the centrifugal fan, wherein the air outlet of the centrifugal fan is respectively connected to the air path of each of the air outlet channels. The air inlet valve is arranged in the second air inlet chamber to control the air flow of the second air inlet chamber into the centrifugal fan. The valve assembly is located near the air outlet of the centrifugal fan to control the opening and closing of the at least two air outlet channels. In this way, air can be taken in separately from both axial sides of the centrifugal fan, and the air volume and direction can be adjusted by distributing the at least two air outlet channels at different positions on the fresh air housing. This enriches the air outlet modes of the fresh air device and meets the needs of users.

[0025] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are specifically listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be construed as limiting the present invention. The same reference numerals are used throughout the accompanying drawings to denote the same components.

[0027] In the attached figure:

[0028] Figure 1 This is a schematic cross-sectional structural diagram of a fresh air device provided by an embodiment of the present invention;

[0029] Figure 2 This is a schematic diagram of the three-dimensional structure of a fresh air device provided by an embodiment of the present invention;

[0030] Figure 3 This is a schematic diagram of the assembly structure of a fresh air device and a heat exchange shell provided by an embodiment of the present invention;

[0031] Figure 4 This is a schematic cross-sectional view of a fresh air device provided by an embodiment of the present invention;

[0032] Figure 5 yes Figure 3 A schematic diagram of the structure at point A in the middle;

[0033] Figure 6 This is a structural schematic diagram of a temperature regulating plate extending into a heat exchange shell provided by an embodiment of the present invention;

[0034] Figure 7 This is a schematic structural diagram of the first part of a fresh air device provided by an embodiment of the present invention;

[0035] Figure 8 This is a schematic diagram of the second part of the structure of a fresh air device provided by an embodiment of the present invention;

[0036] Figure 9 This is a first schematic diagram of the position of a second drainage channel provided by an embodiment of the present invention;

[0037] Figure 10 This is a second schematic diagram of the position of a second drainage channel provided by an embodiment of the present invention;

[0038] Figure 11 This is a schematic diagram of the installation position structure of an anti-absorption baffle provided by an embodiment of the present invention;

[0039] Reference numerals:

[0040] 1. Fresh air housing; 101. First air inlet cavity; 102. Second air inlet cavity; 103. First air inlet channel; 104. Second air inlet channel; 105. First air outlet channel; 106. Second air outlet channel; 107. Third air outlet channel; 108. First drainage channel; 109. Second drainage channel; 1001. Air guide plate; 2. Centrifugal fan; 3. Air inlet valve; 4. Valve assembly; 41. First air outlet valve; 42. Second air outlet valve. 43. Third air outlet valve; 5. Connecting pipe; 6. Air supply pipe; 601. Air outlet; 7. Rotary drive assembly; 71. Rotary motion output device; 72. Transmission gear set; 721. Power input gear; 722. Power output gear; 8. First filter; 9. Second filter; 10. First air inlet pipe; 11. Second air inlet pipe; 12. Temperature regulating plate; 13. Anti-suction baffle; 14. Heat exchange shell; 15. Evaporator; 16. Water receiving part. DETAILED DESCRIPTION

[0041] Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0042] To meet users' ever-higher demands for indoor air quality, fresh air devices have become a crucial component of some electrical appliances. For example, fresh air devices in appliances like air conditioners often utilize a rectangular air outlet design, directly connecting the outlet of the centrifugal fan volute to the outlet. This simple structure minimizes air flow resistance, resulting in high airflow with minimal air loss.

[0043] However, the method of directly connecting the centrifugal fan volute to the air outlet results in a relatively single air outlet pattern, which is difficult to meet the diverse usage needs of users.

[0044] Based on the above technical problems, an embodiment of the present invention is proposed. The embodiment of the present invention discloses a fresh air device, which includes a fresh air housing 1, a centrifugal fan 2, an air inlet valve 3 and a valve assembly 4. The fresh air housing 1 includes at least two air outlet channels, wherein at least two of the air outlet channels are spaced apart downward from the upper area of the fresh air housing 1. The centrifugal fan 2 is installed inside the fresh air housing 1 to separate the interior of the fresh air housing 1 into a first air inlet chamber 101 and a second air inlet chamber 102 along the radial direction of the centrifugal fan 2, wherein the air outlet of the centrifugal fan 2 is respectively connected to the air path of each of the air outlet channels. The air inlet valve 3 is arranged in the second air inlet chamber 102 to control the air flow of the second air inlet chamber 102 to enter the centrifugal fan 2. The valve assembly 4 is close to the air outlet of the centrifugal fan 2 to control the opening and closing of at least two of the air outlet channels. Thus, air can be taken in from both axial sides of the centrifugal fan 2, and the air volume and direction can be adjusted through at least two air outlet channels distributed at different positions on the fresh air housing 1. This enriches the air outlet modes of the fresh air device and meets user needs.

[0045] Reference Figure 1-11 An embodiment of the present invention provides a fresh air device, which may include a fresh air housing 1, a centrifugal fan 2, an air inlet valve 3 and a valve assembly 4. The fresh air housing 1 includes at least two air outlet channels, wherein at least two of the air outlet channels are spaced apart downward from the upper area of the fresh air housing 1. The centrifugal fan 2 is installed inside the fresh air housing 1 to separate the interior of the fresh air housing 1 into a first air inlet chamber 101 and a second air inlet chamber 102 along the radial direction of the centrifugal fan 2, wherein the air outlet of the centrifugal fan 2 is respectively connected to the air path of each of the air outlet channels. The air inlet valve 3 is arranged in the second air inlet chamber 102 to control the air flow of the second air inlet chamber 102 to enter the centrifugal fan 2. The valve assembly 4 is close to the air outlet of the centrifugal fan 2 to control the opening and closing of at least two of the air outlet channels.

[0046] In an embodiment of the present invention, the fresh air device is a device or system for improving indoor air quality, which is widely used in residential, commercial buildings and industrial environments. It realizes the circulation and purification of indoor air by introducing outdoor fresh air (also called fresh air) and exhausting the air in the indoor environment. The fresh air shell 1, as the main structure of the fresh air device, is mainly used to accommodate and support other components, and provide a channel for air flow. In some embodiments, the fresh air shell 1 includes at least two air outlet channels, which start from the upper area of the fresh air shell 1 and are arranged downward in sequence to ensure that the airflow inside the fresh air shell 1 can flow out of the fresh air device into the indoor environment through the air outlet channels in different directions. Among them, the upper area of the fresh air shell 1 can be one of the following areas: the top area of the fresh air shell 1 and the middle upward area of the side of the fresh air shell 1.

[0047] The centrifugal fan 2 is based on the action of centrifugal force. When the impeller of the centrifugal fan 2 rotates, the gas is sucked in from the center of the impeller (which can also be understood as along the axial direction of the centrifugal fan 2) and moves outward in the radial direction of the centrifugal fan 2 under the push of the impeller blades, and is finally discharged through the air outlet provided on the volute structure (also referred to as the air outlet of the centrifugal fan 2). The centrifugal fan 2 is installed inside the fresh air housing 1, and the internal space of the fresh air housing 1 is divided into a first air inlet chamber 101 and a second air inlet chamber 102 along the radial direction of the centrifugal fan 2. When the centrifugal fan 2 is working, air suction can be generated on both sides of the axial direction of the centrifugal fan 2, so that the external air can enter the first air inlet chamber 101 and the second air inlet chamber 102 respectively. And through the rotation of the centrifugal fan 2, the air is discharged from the air outlet of the centrifugal fan 2 into the air outlet channel. The air outlet of the centrifugal fan 2 is connected to the air paths of the air outlet channels, which means that the airflow can be guided into the air outlet channels after passing through the centrifugal fan 2, thereby achieving the guidance of the airflow in different directions.

[0048] The air inlet valve 3 is used to control whether the airflow in the second air inlet chamber 102 enters the centrifugal fan 2. The air inlet valve 3 is disposed within the second air inlet chamber 102 and can be opened or closed according to user needs, thereby controlling the amount of air entering. This improves energy efficiency while meeting user needs. In one or more embodiments, the air inlet valve 3 can be mounted on one axial side of the centrifugal fan 2.

[0049] The valve assembly 4 is used to control the opening and closing status of at least two air outlet channels. Installed near the air outlet of the centrifugal fan 2, the valve assembly 4 can open or close the air outlet channels as needed, thereby achieving precise control of different air outlet directions. This ensures that the fresh air device can adjust the air flow direction according to the user's actual needs.

[0050] In summary, air can be drawn in from both axial sides of the centrifugal fan 2. This dual-sided intake mode provides a more uniform airflow, resolving localized airflow unevenness within the centrifugal fan 2 and reducing operating noise within the fresh air device. Furthermore, by distributing at least two air outlet channels at different locations on the fresh air housing 1, the air volume and direction can be adjusted. This enriches the air outlet modes of the fresh air device and meets user needs.

[0051] An optional embodiment of the invention, referring to Figure 1 、 Figure 2 、 Figure 3 as well as Figure 5 As shown, the fresh air device can also include a connecting pipe 5, an air supply pipe 6 and a rotating drive component 7. The connecting pipe 5 is connected to one of the air outlet channels and is fixedly connected to the fresh air shell 1; at least two air outlet holes 601 are provided on the air supply pipe 6, and are rotatably connected to the connecting pipe 5; the rotating drive component 7 is transmission-connected to the air supply pipe 6, and drives the air supply pipe 6 to rotate when the rotating drive component 7 is working, so as to be used for windless air outlet.

[0052] In an embodiment of the present invention, the connecting pipe 5 may be a curved pipe, which may be provided in one of the air outlet channels, and the connecting pipe 5 may be fixed to the fresh air housing 1. For example, the connecting pipe 5 may be fixed to the fresh air housing 1 by means of snap connection, threaded connection or welding. At least two air outlet holes 601 are provided on the air supply pipe 6. For example, at least two air outlet holes 601 may be distributed at intervals along the axial direction of the air supply pipe 6. The air supply pipe 6 is in air communication with one of the air outlet channels, so that the air in the air outlet channels may be introduced into the indoor environment through the air outlet holes 601. The connecting pipe 5 and the air supply pipe 6 may be connected by a rotary joint, so that the air supply pipe 6 and the connecting pipe 5 can be rotatably connected. This enables the air supply pipe 6 to rotate under the action of a driving force.

[0053] The rotary drive assembly 7 is used to output rotary motion, which serves as a power source for driving the air supply pipe 6 to rotate. The rotary drive assembly 7 is in transmission connection with the air supply pipe 6. When the rotary drive assembly 7 is working, it drives the air supply pipe 6 to rotate. The rotary motion of the air supply pipe 6 can change the direction of the air outlet 601 on the air supply pipe 6, and then change the air supply direction of the fresh air device, and can disperse the airflow through the multiple air outlets 601 to achieve the effect of windless air outlet, which greatly improves the user's experience. Windless air outlet can be understood as an air outlet state in which the user does not feel the wind.

[0054] In one or more embodiments, the diameter of the air supply pipe 6 can be set between 10 mm and 15 mm. For example, the diameter of the air supply pipe 6 can be selected from values such as 10 mm, 12 mm, 13 mm, and 15 mm. Within this diameter range, the centrifugal fan 2 can maintain high operating efficiency. For example, if the diameter of the air supply pipe 6 is less than 10 mm, the air pressure in the first air inlet cavity 101 and the second air inlet cavity 102 will be high, thereby reducing the operating efficiency of the centrifugal fan 2.

[0055] In summary, based on the above-mentioned structural arrangement, the fresh air device may include one of the following air intake modes: a single-sided air intake mode and a double-sided air intake mode. The fresh air device also includes one of the following air outlet modes: a normal air outlet mode and a windless air outlet mode. Correspondingly, the normal air outlet mode may be an air outlet mode that selects air in different directions. The windless air outlet mode may also select a windless air outlet mode in different rotation directions. For example, in the double-sided air intake mode, the air volume in the air supply pipe 6 is large, and the user may experience the feeling of wind when facing the user. Thus, the angle of the air outlet 601 of the air supply pipe 6 can be rotated so that the air outlet 601 does not face the user, thereby increasing the ventilation volume per unit time of the fresh air device while preventing the user from feeling the wind, thereby further improving the user experience.

[0056] An optional embodiment of the invention, referring to Figure 1 As shown, the fresh air housing 1 is further provided with a first air inlet channel 103 connected to the first air inlet chamber 101, wherein the width of the first air inlet channel 103 gradually narrows from the direction away from the centrifugal fan 2 to the direction close to the centrifugal fan 2.

[0057] In an embodiment of the present invention, the first air inlet channel 103 is in air communication with the first air inlet chamber 101, and the first air inlet channel 103 can serve as the air inlet channel when the fresh air device operates in a single-side air inlet mode. A partition can be provided in the corresponding area of the fresh air housing 1 to form the first air inlet channel 103. The width W of the first air inlet channel 103 gradually narrows from the direction away from the centrifugal fan 2 to the direction close to the centrifugal fan 2. This can be understood as the cross-sectional area of the first air inlet channel 103 gradually becoming smaller from the direction away from the centrifugal fan 2 to the direction close to the centrifugal fan 2. Therefore, when the outdoor fresh air enters the first air inlet channel 103, the fresh air is guided to reduce the collision loss of the gas. The gradually decreasing cross-sectional area also helps to increase the flow rate of the fresh air, so that the fresh air can quickly enter the centrifugal fan 2, further improving the ventilation effect of the fresh air device.

[0058] In one or more embodiments, the first air inlet cavity 101 may be located below the centrifugal fan 2 , and the second air inlet cavity 102 may be located above the centrifugal fan 2 .

[0059] An optional embodiment of the invention, referring to Figure 1 、 Figure 4 as well as Figure 8 As shown, the fresh air housing 1 is further provided with a second air inlet channel 104 in air communication with the second air inlet chamber 102 , wherein the first air inlet channel 103 is further provided with a first filter 8 . And / or, the second air inlet channel 104 is further provided with a second filter 9 .

[0060] In an embodiment of the present invention, the first filter 8 is used to filter outdoor fresh air, so that when the fresh air passes through the first filter 8, it can be filtered by the first filter 8 to filter out dust and particulate matter in the fresh air, thereby ensuring the cleanliness of the air in the indoor environment. In addition, the first filter 8 can protect the centrifugal fan 2, preventing dust and particulate matter from entering the centrifugal fan 2 with the air. If dust and particulate matter accumulate on the centrifugal fan 2 for a long time, it will affect the operating stability of the centrifugal fan 2, for example, it will cause the impeller of the centrifugal fan 2 to be unbalanced, or reduce the heat exchange efficiency, etc. Therefore, the first filter 8 can filter the air and extend the service life of the centrifugal fan 2. An optional embodiment of the invention,

[0061] The second air inlet channel 104 is in air communication with the second air inlet cavity 102 and can serve as a second air inlet channel when the fresh air device operates in dual-side air intake mode. For example, a partition can be provided in a corresponding area of the fresh air housing 1 to form the second air inlet channel 104. Thus, by simultaneously supplying air through the first air inlet channel 103 and the second air inlet channel 104, the ventilation efficiency of the centrifugal fan 2 can be improved, meeting the air volume requirements of different users.

[0062] The second filter 9 is used to filter outdoor fresh air. As the fresh air passes through the second filter 9, it is also filtered by the second filter 9, removing dust and particulate matter from the fresh air. This ensures clean air in the indoor environment. Furthermore, the second filter 9 protects the centrifugal fan 2, preventing dust and particulate matter from entering the centrifugal fan 2 along with the air. Long-term accumulation of dust and particulate matter on the centrifugal fan 2 can affect its operational stability, for example, causing the impeller of the centrifugal fan 2 to become unbalanced or reducing heat exchange efficiency. Thus, the second filter 9 not only filters the air but also extends the service life of the centrifugal fan 2.

[0063] An optional embodiment of the invention, referring to Figure 1 、 Figure 3 、 Figure 4 as well as Figure 7 As shown, the fresh air device further includes a first air inlet duct 10 and a second air inlet duct 11. The first air inlet duct 10 is in air communication with the first air inlet channel 103, and an end of the first air inlet duct 10 away from the first air inlet channel 103 is in air communication with the outside of the room. One end of the second air inlet duct 11 is in air communication with the second air inlet channel 104, and the other end is in air communication with a side portion of the first air inlet duct 10. The diameter of the second air inlet duct 11 is smaller than that of the first air inlet duct 10.

[0064] In the embodiment of the present invention, the first air inlet duct 10 is used to introduce outdoor fresh air into the first air inlet channel 103, and the second air inlet duct 11 is used to introduce outdoor fresh air into the second air inlet channel 104. The end of the second air inlet duct 11 away from the second air inlet channel 104 can be connected to the side of the first air inlet duct 10. In other words, the end of the first air inlet duct 10 away from the first air inlet channel 103 can extend to the outside of the room, thereby allowing outdoor fresh air to be introduced into the first air inlet duct 10 when the centrifugal fan 2 is operating.

[0065] In one example, refer to Figure 1As shown, when the fresh air device operates in a single-side air intake mode, the air intake valve 3 is closed, and the fresh air entering the first air intake pipe 10 flows through the first air intake channel 103, then flows to the centrifugal fan 2, and finally flows from the centrifugal fan 2 to the air outlet channel. Figure 4 As shown, in another example, when the fresh air device operates in dual-side air intake mode, the air intake valve 3 is opened, and a portion of the fresh air in the first air intake duct 10 enters the second air intake channel 104 through the second air intake duct 11. Another portion of the fresh air in the first air intake duct 10 enters the first air intake channel 103, thereby flowing toward the centrifugal fan 2 from both axial sides of the centrifugal fan 2 simultaneously, thereby increasing the ventilation efficiency of the centrifugal fan 2. The diameter of the first air intake duct 10 is larger than the diameter of the second air intake duct 11, ensuring that a large amount of air enters the first air intake channel 103 even when the fresh air device operates in single-side air intake mode.

[0066] An optional embodiment of the invention, referring to Figure 1 、 Figure 2 、 Figure 3 、 Figure 5 as well as Figure 8 As shown, the rotary drive assembly 7 includes a rotary motion output device 71 and a transmission gear set 72. The rotary motion output device 71 is fixedly connected to the fresh air housing 1. The power input gear 721 of the transmission gear set 72 is coaxially fixed with the output shaft of the rotary motion output device 71, so that when the rotary motion output device 71 rotates, the transmission gear set 72 is driven to rotate. The air supply pipe 6 is coaxially fixed with the power output gear 722 of the transmission gear set 72, so that when the transmission gear set 72 rotates, the air supply pipe 6 is driven to rotate.

[0067] In an embodiment of the present invention, the rotational motion output device 71 outputs rotational motion through its rotational shaft. For example, the rotational motion output device 71 can be a component such as a motor. The rotational motion output device 71 can be fixed to the fresh air housing 1 in a detachable manner such as a bolt connection to facilitate the disassembly and assembly of the rotational motion output device 71. The transmission gear set 72 refers to a component that realizes the transmission of rotational motion by engaging at least two transmission gears with each other. It may include a power input gear 721 and a power output gear 722, wherein the power input gear 721 can be understood as a transmission gear directly connected to the output shaft of the rotational motion output device 71. The power output gear 722 can be understood as a transmission gear directly connected to the air supply pipe 6.

[0068] The power input gear 721 is coaxially fixed with the output shaft, which can be understood as the central axis of the power input gear 721 coincides with the central axis of the output shaft and is fixedly connected. When the rotary motion output device 71 is working, it drives the power input gear 721 to rotate, and based on the gear meshing relationship in the transmission gear set 72, drives the power output gear 722 to rotate. The air supply pipe 6 is coaxially fixed with the power output gear 722, which can be understood as the central axis of the air supply pipe 6 coincides with the central axis of the power output gear 722 and is fixedly connected. For example, the air supply pipe 6 and the power output gear 722 can be clearance-fitted or integrally formed. Thus, the air supply pipe 6 is driven to rotate by the rotary motion output device 71, thereby changing the air outlet direction of the air outlet 601.

[0069] For example, the air outlet direction of the air outlet 601 may include downward and upward. Figure 2 As shown, when the fresh air device operates in single-side air intake mode and wind-free air outlet mode, the corresponding air outlet holes 601 on the air supply pipe 6 can be set to discharge air downward. In this case, since the air volume of the single-side air intake is not large, the air is diverted by multiple air outlet holes 601. Even if the air outlet holes 601 blow air toward the user, the user will not feel the wind, thus achieving the requirement of wind-free air outlet.

[0070] Reference Figure 5 As shown, when the fresh air device operates in dual-side air intake mode and wind-free air outlet mode, the corresponding air outlet holes 601 on the air supply pipe 6 can be oriented upward. In this case, due to the large volume of air entering from both sides, the air is diverted through multiple air outlet holes 601. If the air outlet holes 601 blow air toward the user, the user may feel the wind. Targeting the air outlet holes 601 upward ensures that the airflow does not blow toward the user, thereby achieving the desired wind-free air outlet.

[0071] An optional embodiment of the invention, referring to Figure 1 、 Figure 4 as well as Figure 8 As shown, the upper area of the fresh air housing 1 is distributed downward in sequence: a first air outlet channel 105, a second air outlet channel 106 and a third air outlet channel 107, the air supply pipe 6 is connected to the first air outlet channel 105, and the second air outlet channel 106 is distributed along the radial direction of the centrifugal fan 2.

[0072] In an embodiment of the present invention, different air outlet channels can be formed in the fresh air housing 1 through structures such as partitions. For example, three air outlet channels can be sequentially arranged downward from the upper area of the fresh air housing 1, which can be: a first air outlet channel 105, a second air outlet channel 106, and a third air outlet channel 107. The air supply pipe 6 is in airflow communication with the first air outlet channel 105. For example, the air outlet of the first air outlet channel 105 can be arranged toward the top of the fresh air housing 1, the air outlet of the second air outlet channel 106 can be arranged toward the side of the fresh air housing 1, and the air outlet of the third air outlet channel 107 can be arranged toward the bottom of the fresh air housing 1. In other words, when the fresh air device is running in normal air outlet mode, it can be configured with the following two modes: side air outlet mode and bottom air outlet mode. The bottom air outlet mode can adapt to the user's need to experience a large amount of air, thereby greatly enriching the air outlet modes of the fresh air device.

[0073] The second air outlet channel 106 is connected to the air outlet of the centrifugal fan 2 and is distributed along the radial direction of the centrifugal fan 2. The second air outlet channel 106 can be located in the side area of the fresh air housing 1 closest to the air outlet of the centrifugal fan 2. This structural arrangement allows the airflow from the centrifugal fan 2 to flow directly into the room through the second air outlet channel 106 without changing direction. In other words, this prevents the airflow from changing direction from decreasing in velocity and reduces noise caused by air impact, vortexes, etc.

[0074] An optional embodiment of the invention, referring to Figure 1 As shown, the valve assembly 4 includes a first air outlet valve 41, a second air outlet valve 42, and a third air outlet valve 43. The first air outlet valve 41 is disposed in the first air outlet channel 105 to control the opening and closing of the first air outlet channel 105. The second air outlet valve 42 is disposed in the second air outlet channel 106 to control the opening and closing of the second air outlet channel 106. The third air outlet valve 43 is disposed in the third air outlet channel 107 to control the opening and closing of the third air outlet channel 107.

[0075] In an embodiment of the present invention, the valve assembly 4 includes at least two air outlet valves, and the number of the air outlet valves is consistent with the number of air outlet channels. When the air outlet channels include a first air outlet channel 105, a second air outlet channel 106, and a third air outlet channel 107, the valve assembly 4 may include a first air outlet valve 41, a second air outlet valve 42, and a third air outlet valve 43. The area of the second air outlet channel 106 near the air outlet can be in air communication with the first air outlet channel 105, and the area of the second air outlet channel 106 near the air outlet can be in air communication with the third air outlet channel 107. Thus, the second air outlet channel 106 can be used to form an air communication between the first air outlet channel 105 and the air outlet of the centrifugal fan 2, and the third air outlet channel 107 can be in air communication with the air outlet of the centrifugal fan 2.

[0076] The first air outlet valve 41 is disposed in the first air outlet channel 105. For example, the first air outlet valve 41 can be located at the connection between the first air outlet channel 105 and the second air outlet channel 106, for controlling the opening and closing of the first air outlet channel 105. For another example, the second air outlet valve 42 can be located at the end of the second air outlet channel 106 away from the centrifugal fan 2, for controlling the closing of the second air outlet channel 106. For another example, the third air outlet valve 43 can be located at the connection between the third air outlet channel 107 and the second air outlet channel 106, for controlling the closing of the third air outlet channel 107. Thus, a user can open one of the first air outlet valve 41, the second air outlet valve 42, and the third air outlet valve 43 according to their needs to achieve different air outlet modes, thereby enriching the air outlet modes of the fresh air device.

[0077] In summary, an embodiment of the present invention discloses a fresh air device, which may include a fresh air housing 1, a centrifugal fan 2, an air inlet valve 3, and a valve assembly 4. The fresh air housing 1 includes at least two air outlet channels, wherein the at least two air outlet channels are spaced apart downward from the upper region of the fresh air housing 1. The centrifugal fan 2 is mounted within the fresh air housing 1 to divide the interior of the fresh air housing 1 into a first air inlet chamber 101 and a second air inlet chamber 102 along the radial direction of the centrifugal fan 2. The air outlet of the centrifugal fan 2 is connected to the air path of each of the air outlet channels. The air inlet valve 3 is disposed in the second air inlet chamber 102 to control the airflow from the second air inlet chamber 102 into the centrifugal fan 2. The valve assembly 4 is located near the air outlet of the centrifugal fan 2 to control the opening and closing of the at least two air outlet channels. Thus, air can be taken in from both axial sides of the centrifugal fan 2, and the air volume and direction can be adjusted by distributing the at least two air outlet channels at different positions on the fresh air housing 1. This enriches the air outlet mode of the fresh air device and meets the needs of users.

[0078] Reference Figure 3 、 Figure 4 as well as Figure 6 As shown, an embodiment of the present invention further discloses an electrical appliance, which may include the fresh air device as described in any one of the above-mentioned embodiments of the invention, and the electrical appliance includes one of the following: an air conditioner, a fresh air ventilator, and an air environment machine.

[0079] In the embodiments of the present invention, an air conditioner refers to a device used to regulate indoor air parameters such as temperature, humidity, cleanliness, and airflow velocity to create a comfortable indoor environment. Depending on the installation method of the indoor unit, it can include wall-mounted air conditioners and ducted air conditioners. An air conditioner equipped with the aforementioned fresh air device can enrich the air intake and outlet modes of the air conditioner, meet user needs, and enhance the user experience.

[0080] A fresh air ventilator is a device that draws fresh outdoor air into a room and exhausts indoor air, performing heat exchange and filtering on the incoming and outgoing air. A fresh air ventilator equipped with such a fresh air device can enrich the air intake and outlet modes of the fresh air ventilator, meet user needs, and enhance the user experience.

[0081] An air conditioner is a device that integrates multiple functions, designed to comprehensively improve indoor air quality. It typically incorporates functions such as air purification, temperature regulation, humidity control, and fresh air ventilation. An air conditioner equipped with such a fresh air device can enrich its air intake and outlet modes, meet user needs, and enhance the user experience.

[0082] An optional invention content, referring to Figure 3 and Figure 6 As shown, when the appliance includes a heat exchange system, the appliance also includes a heat exchange housing 14 for mounting the heat exchange system, and the heat exchange housing 14 is fixedly connected to the fresh air housing 1. The fresh air device also includes a temperature regulating plate 12, which is located in the first air inlet cavity 101 and / or the second air inlet cavity 102 of the fresh air device and extends into the heat exchange housing 14 to transfer the cooling or heating generated by the heat exchange system to the first air inlet cavity 101 and / or the second air inlet cavity 102.

[0083] In this embodiment of the present invention, the heat exchange system is used to achieve heat exchange and primarily includes components such as an evaporator 15, a condenser, a compressor, and a throttling device. The evaporator 15 is typically installed in the indoor unit, while the condenser and compressor are typically installed in the outdoor unit. In other words, the heat exchange housing 14 can be used to house the evaporator 15. The heat exchange housing 14 can be fixedly connected to the fresh air housing 1.

[0084] When the low-temperature, low-pressure refrigerant gas enters the evaporator 15, it evaporates in the evaporator 15 pipe, absorbs heat from the surrounding air in the indoor environment, and reduces the air temperature, thereby achieving a cooling effect. At the same time, the water vapor in the air will condense on the surface of the evaporator 15 when it is cooled, forming condensed water that is discharged, thereby achieving the purpose of dehumidification. The condenser is a component where the refrigerant condenses and releases heat. After being discharged from the compressor, the high-temperature and high-pressure refrigerant gas enters the condenser. In the condenser, the refrigerant exchanges heat with the outside air through the pipe, transferring the heat to the outdoor air. The refrigerant in the condenser cools and condenses into liquid. In this way, the heat absorbed by the refrigerant in the evaporator 15 is transferred to the outdoor air.

[0085] The compressor compresses the low-temperature, low-pressure refrigerant gas into a high-temperature, high-pressure gas, increasing the refrigerant's pressure and temperature so that it can dissipate heat and condense smoothly in the condenser. The throttling device throttles and reduces the pressure of the high-pressure liquid refrigerant flowing out of the condenser, converting it into a low-temperature, low-pressure liquid so that it can enter the evaporator 15 for evaporation and heat absorption.

[0086] In cooling mode, the heat exchange system absorbs indoor heat through the evaporator 15 and transfers the heat to the refrigerant. The compressor then transports the high-temperature, high-pressure refrigerant gas to the condenser, where it releases the heat to the outside. In heating mode, by changing the refrigerant flow direction, the evaporator 15 and condenser interchange their functions, absorbing heat from the outside and releasing it to the inside.

[0087] Therefore, in the case where the electrical appliance includes a heat exchange system, the fresh air device may further include a thermostat 12, and the thermostat 12 may be arranged in the first air inlet cavity 101, or the thermostat 12 may be arranged in the second air inlet cavity 102. Alternatively, at least one thermostat 12 is arranged in the first air inlet cavity 101, and at least one thermostat 12 is arranged in the second air inlet cavity 102. The thermostat 12 may be made of a metal material with good thermal conductivity, for example, the metal material may include at least the following types: aluminum, copper, and aluminum alloy. The thermostat 12 extends into the heat exchange housing 14. For example, for an air conditioner, the thermostat 12 may extend to the area where the evaporator 15 is installed in the indoor unit of the air conditioner.

[0088] During cooling, the cold air from the outer surface of the evaporator 15 is transferred through the temperature regulating plate 12 to the first air inlet chamber 101 and / or the second air inlet chamber 102. During heating, the heat from the outer surface of the evaporator 15 is transferred through the temperature regulating plate 12 to the first air inlet chamber 101 and / or the second air inlet chamber 102. This allows the fresh air to be cooled or heated. This allows the outlet air temperature of the fresh air device to be optimized.

[0089] When the outdoor temperature is low and the temperature of the fresh air inhaled by the centrifugal fan 2 is low, the power consumption will increase. The heat exchange of the temperature regulating plate 12 can keep the temperature of the fresh air entering the centrifugal fan 2 moderate, thereby improving the ventilation efficiency of the centrifugal fan 2.

[0090] In some optional embodiments of the invention, reference is made to Figure 7 As shown, the extension length L of each of the temperature regulating plates 12 in the area where the heat exchange system (such as the evaporator 15) is installed can be set between 6 mm and 10 mm. For example, the area extension length can be 6 mm, 8 mm, and 10 mm, etc. If the area extension length is too long, it will affect the air outlet of the heat exchange system. On the basis that 6 mm to 10 mm does not affect the air outlet of the heat exchange system, the heat exchange efficiency of the temperature regulating plate 12 can also be improved. That is to say, the heat exchange efficiency is improved by increasing the contact area with the area of the evaporator 15. For example, the temperature regulating plate 12 can be extended outward from the side of the fresh air device.

[0091] In an optional embodiment of the invention, referring to Figure 8 、 Figure 9 as well as Figure 10As shown, when the first air inlet cavity 101 is installed with the temperature regulating plate 12, a first drainage channel 108 is provided on the bottom wall of the first air inlet cavity 101, and the first drainage channel 108 is connected to the water receiving member 16 of the appliance. And / or, when the second air inlet cavity 102 is installed with the temperature regulating plate 12, a second drainage channel 109 is provided on the bottom wall of the second air inlet cavity 102, and the second drainage channel 109 is connected to the water receiving member 16 of the appliance.

[0092] In this embodiment of the present invention, if the thermostat 12 is installed in the first air inlet chamber 101, a first drainage channel 108 is provided on the bottom wall of the first air inlet chamber 101. Because the thermostat 12 is directly installed in the first air inlet chamber 101, there is a temperature difference between the thermostat 12 and the temperature in the first air inlet chamber 101 during operation of the heat exchange system, potentially generating condensation. Consequently, condensation generated on the thermostat 12 can drip onto the bottom wall of the first air inlet chamber 101 and then flow along the bottom wall of the first air inlet chamber 101 to be collected in the water receiving member 16 of the appliance.

[0093] If the second air inlet chamber 102 is equipped with the thermostat 12, a second drainage channel 109 is provided on the bottom wall of the second air inlet chamber 102. Since the thermostat 12 is directly installed in the second air inlet chamber 102, there is a temperature difference between the thermostat 12 and the temperature in the second air inlet chamber 102 during operation of the heat exchange system, potentially generating condensation. Consequently, condensation generated on the thermostat 12 can drip onto the bottom wall of the second air inlet chamber 102, then flow along the bottom wall of the second air inlet chamber 102 to the water receiving member 16 of the appliance for collection. For example, the water receiving member 16 can be fixed to the outer side of the fresh air housing 1 facing the heat exchange housing 14.

[0094] When the second air inlet cavity 102 and the first air inlet cavity 101 are arranged vertically, to facilitate the installation of the centrifugal fan 2, a corresponding fan bracket can be provided in the first air inlet cavity 101 to support the centrifugal fan 2. In one example, an air guide plate 1001 and a mounting plate can be provided in the fresh air housing 1. The upper surface of the air guide plate 1001 can serve as the bottom wall of the second air inlet cavity 102. The air guide plate 1001 and the mounting plate are spaced apart to form a cavity for accommodating the centrifugal fan 2.

[0095] The second drainage channel 109 can also be connected to the water receiving member 16 through the first drainage channel 108. In other words, condensation can enter the first air inlet chamber 101 from the second drainage channel 109, and then pass through the first drainage channel 108 in the first air inlet chamber 101 to be directed into the water receiving member 16.

[0096] In an optional embodiment of the invention, referring to Figure 9 and Figure 10 As shown, the bottom wall of the second air inlet cavity 102 gradually slopes downward from a direction away from the heat exchange system to a direction close to the heat exchange system.

[0097] In this embodiment of the present invention, an air inlet connected to the centrifugal fan 2 is provided at the center of the bottom wall of the second air inlet chamber 102. To prevent condensation from flowing into the centrifugal fan 2 and to expel the condensation more quickly, the bottom wall of the second air inlet chamber 102 gradually slopes downward from a direction away from the heat exchange system to a direction close to the heat exchange system. Since the temperature regulating plate 12 is only provided on one side close to the heat exchange system, when the condensation drips onto the bottom wall of the second air inlet chamber 102, it will flow along the inclined surface toward the heat exchange system and then toward the water receiving member 16.

[0098] In one or more embodiments, the angle a between the bottom wall of the second air inlet cavity 102 and the horizontal direction may be between 3 degrees and 5 degrees. The angle a between the bottom wall of the second air inlet cavity 102 and the horizontal direction may be 3 degrees, 4 degrees, or 5 degrees, etc. Within this angle range, the inclined surface can have a certain inclination, thereby improving the drainage effect while avoiding affecting the airflow.

[0099] In an optional embodiment of the invention, referring to Figure 11 As shown, the fresh air device further includes an anti-absorption baffle 13, which is disposed between the temperature regulating plate 12 disposed in the first air inlet chamber 101 and the centrifugal fan 2 to prevent condensation generated by the temperature regulating plate 12 from being absorbed by the centrifugal fan 2. And / or, the anti-absorption baffle 13 is disposed between the temperature regulating plate 12 disposed in the second air inlet chamber 102 and the centrifugal fan 2 to prevent condensation generated by the temperature regulating plate 12 from being absorbed by the centrifugal fan 2.

[0100] In an embodiment of the present invention, since the temperature regulating plate 12 is installed in the first air inlet chamber 101 and / or the second air inlet chamber 102, there is a risk that condensation will be sucked into the centrifugal fan 2 when the operating speed of the centrifugal fan 2 is too high. The anti-absorption baffle 13 can be arranged between the temperature regulating plate 12 and the centrifugal fan 2. For example, the anti-absorption baffle 13 can be a plate-like structure made of sponge material or other insulating materials. This can prevent the condensation generated on the temperature regulating plate 12 from being absorbed into the centrifugal fan 2. In one example, if the temperature regulating plate 12 is only installed in the first air inlet chamber 101, the anti-absorption baffle 13 is arranged in the first air inlet chamber 101. If the temperature regulating plate 12 is only installed in the second air inlet chamber 102, the anti-absorption baffle 13 is arranged in the second air inlet chamber 102. If the temperature regulating plate 12 is installed in the first air inlet cavity 101 and the second air inlet cavity 102 respectively, the anti-absorption baffle 13 can be provided in the first air inlet cavity 101 and the second air inlet cavity 102 respectively.

[0101] When multiple thermostatic fins 12 are provided, they can be arranged at equal intervals. A mounting box is provided in the area of the heat exchange system where the thermostatic fins 12 are located, and the mounting box is used to install and secure the thermostatic fins 12. The anti-absorption baffle 13 is made of an insulating material, ensuring that even when the user is not using the fresh air device, the heat exchange system still transfers cooling or heat to the fresh air device during operation. This significantly reduces heat loss from the heat exchange system when there is no airflow and the anti-absorption baffle 13 at least partially surrounds the thermostatic baffle, thereby ensuring the heat exchange efficiency of the heat exchange system.

[0102] In summary, an embodiment of the present invention discloses an electrical appliance, which may include a fresh air housing 1, a centrifugal fan 2, an air inlet valve 3, and a valve assembly 4. The fresh air housing 1 includes at least two air outlet channels, wherein the at least two air outlet channels are spaced apart downward from the upper region of the fresh air housing 1. The centrifugal fan 2 is mounted within the fresh air housing 1 to divide the interior of the fresh air housing 1 into a first air inlet chamber 101 and a second air inlet chamber 102 along the radial direction of the centrifugal fan 2, wherein the air outlet of the centrifugal fan 2 is respectively connected to the air path of each of the air outlet channels. The air inlet valve 3 is disposed in the second air inlet chamber 102 to control the airflow from the second air inlet chamber 102 into the centrifugal fan 2. The valve assembly 4 is located near the air outlet of the centrifugal fan 2 to control the opening and closing of the at least two air outlet channels. Thus, air can be taken in separately from both axial sides of the centrifugal fan 2, and the air volume and direction can be adjusted by distributing the at least two air outlet channels at different positions on the fresh air housing 1. This enriches the air outlet mode of the fresh air device and meets the needs of users.

[0103] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0104] It is easy for those skilled in the art to think that any combination of the above embodiments is feasible, so any combination of the above embodiments is an implementation scheme of the present invention. However, due to space limitations, this specification will not describe them in detail here.

[0105] In the description provided herein, numerous specific details are described. However, it is understood that embodiments of the present invention may be practiced without these specific details. In some instances, well-known methods, structures, and techniques are not shown in detail so as not to obscure the understanding of this description.

[0106] Similarly, it should be understood that in order to streamline the invention and aid in understanding one or more of the various inventive aspects, in the above description of exemplary embodiments of the invention, various features of the invention are sometimes grouped together into a single embodiment, figure, or description thereof.

[0107] Furthermore, those skilled in the art will appreciate that although some embodiments described herein include certain features included in other embodiments but not other features, combinations of features from different embodiments are intended to be within the scope of the present invention and to form different embodiments. For example, in the claims, any of the claimed embodiments may be used in any combination.

Claims

1. A fresh air device, characterized in that: The fresh air device comprises: A fresh air housing (1), the fresh air housing (1) comprising at least two air outlet channels, wherein the at least two air outlet channels are spaced apart and distributed downward from an upper region of the fresh air housing (1); A centrifugal fan (2), the centrifugal fan (2) being installed inside the fresh air housing (1) so as to separate the interior of the fresh air housing (1) into a first air inlet chamber (101) and a second air inlet chamber (102) along the radial direction of the centrifugal fan (2), wherein the air outlet of the centrifugal fan (2) is respectively connected to the air path of each of the air outlet channels; an air inlet valve (3), the air inlet valve (3) being arranged in the second air inlet cavity (102) to control the airflow of the second air inlet cavity (102) to enter the centrifugal fan (2); A valve assembly (4), the valve assembly (4) is located near the air outlet of the centrifugal fan (2) to control the opening and closing of at least two air outlet channels.

2. The fresh air device according to claim 1, characterized in that: The fresh air device also includes: A connecting pipe (5), the connecting pipe (5) is in air communication with one of the air outlet channels and is fixedly connected to the fresh air housing (1); An air supply pipe (6), the air supply pipe (6) is provided with at least two air outlet holes (601) and is rotatably connected to the connecting pipe (5); A rotary drive assembly (7) is in transmission connection with the air supply pipe (6). When the rotary drive assembly (7) is in operation, it drives the air supply pipe (6) to rotate, so as to discharge air without a sense of wind.

3. The fresh air device according to claim 1, characterized in that: A first air inlet channel (103) in air communication with the first air inlet chamber (101) is further provided in the fresh air housing (1), wherein the width of the first air inlet channel (103) gradually narrows from a direction away from the centrifugal fan (2) to a direction close to the centrifugal fan (2).

4. The fresh air device according to claim 3, characterized in that: A second air inlet channel (104) in air communication with the second air inlet chamber (102) is further provided in the fresh air housing (1), and a first filter (8) is further installed in the first air inlet channel (103); and / or, A second filter (9) is also installed in the second air inlet channel (104).

5. The fresh air device according to claim 4, characterized in that: The fresh air device also includes: a first air inlet pipe (10), wherein the first air inlet pipe (10) is in air communication with the first air inlet channel (103), and an end of the first air inlet pipe (10) away from the first air inlet channel (103) is in communication with the outside of the room; A second air inlet pipe (11), one end of the second air inlet pipe (11) is connected to the air path of the second air inlet channel (104), and the other end is connected to the side of the first air inlet pipe (10), wherein the diameter of the second air inlet pipe (11) is smaller than the diameter of the first air inlet pipe (10).

6. The fresh air device according to claim 2, characterized in that: The rotary drive assembly (7) comprises: A rotational motion output device (71), the rotational motion output device (71) being fixedly connected to the fresh air housing (1); A transmission gear set (72), wherein the power input gear (721) of the transmission gear set (72) is coaxially fixed with the output shaft of the rotary motion output device (71), so as to drive the transmission gear set (72) to rotate when the rotary motion output device (71) rotates, wherein the air supply pipe (6) is coaxially fixed with the power output gear (722) of the transmission gear set (72), so as to drive the air supply pipe (6) to rotate when the transmission gear set (72) rotates.

7. The fresh air device according to claim 2, characterized in that: The upper area of the fresh air housing (1) is provided with: a first air outlet channel (105), a second air outlet channel (106), and a third air outlet channel (107) spaced apart downwardly; the air supply pipe (6) is in air communication with the first air outlet channel (105); The second air outlet channels (106) are distributed along the radial direction of the centrifugal fan (2).

8. The fresh air device according to claim 7, characterized in that: The valve assembly (4) comprises: a first air outlet valve (41), the first air outlet valve (41) being arranged in the first air outlet channel (105) to control the opening and closing of the first air outlet channel (105); a second air outlet valve (42), the second air outlet valve (42) being arranged in the second air outlet channel (106) to control the opening and closing of the second air outlet channel (106); A third air outlet valve (43) is provided in the third air outlet channel (107) to control the opening and closing of the third air outlet channel (107).

9. An electrical appliance, characterized in that: The electrical appliance includes the fresh air device according to any one of claims 1 to 8, and the electrical appliance includes one of the following: an air conditioner, a fresh air ventilator, and an air environment machine.

10. The electrical appliance according to claim 9, characterized in that In the case where the electrical appliance includes a heat exchange system, the electrical appliance further includes a heat exchange housing (14) for installing the heat exchange system, the heat exchange housing (14) is fixedly connected to the fresh air housing (1), and the fresh air device further includes a temperature regulating plate (12), the temperature regulating plate (12) is located in the first air inlet cavity (101) and / or the second air inlet cavity (102) of the fresh air device, and extends into the heat exchange housing (14) to transfer the cold or heat generated by the operation of the heat exchange system to the first air inlet cavity (101) and / or the second air inlet cavity (102).

11. The electrical appliance according to claim 10, characterized in that When the first air inlet cavity (101) is equipped with the temperature regulating plate (12), the bottom wall of the first air inlet cavity (101) is provided with a first drainage channel (108), and the first drainage channel (108) is connected to the water receiving part (16) of the electrical appliance; and / or, When the second air inlet cavity (102) is installed with the temperature regulating plate (12), a second drainage channel (109) is provided on the bottom wall of the second air inlet cavity (102), and the second drainage channel (109) is connected to the water receiving part (16) of the electrical appliance.

12. The electrical appliance according to claim 11, characterized in that The bottom wall of the second air inlet cavity (102) gradually slopes downward from a direction away from the heat exchange system to a direction close to the heat exchange system.

13. The electrical appliance according to claim 11, characterized in that The fresh air device further comprises an anti-absorption baffle (13), the anti-absorption baffle (13) being arranged between the temperature regulating plate (12) arranged in the first air inlet chamber (101) and the centrifugal fan (2), for preventing condensation generated by the temperature regulating plate (12) from being adsorbed by the centrifugal fan (2); and / or, The anti-absorption baffle (13) is arranged between the temperature regulating plate (12) provided in the second air inlet chamber (102) and the centrifugal fan (2) to prevent condensation generated by the temperature regulating plate (12) from being absorbed by the centrifugal fan (2).

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