Fresh air module and air conditioner

Abstract

The application provides a fresh air module and an air conditioner. The fresh air module comprises a volute assembly, a fan and an air inlet cover. The volute assembly is provided with an air inlet portion and a sound absorption portion. The fan is arranged in the inner cavity of the volute assembly. The air inlet cover is connected to the outer wall of the volute assembly. A cavity is formed between the air inlet cover and the outer wall of the volute assembly. The cavity is divided into an air inlet cavity and a sound absorption cavity. The air inlet cavity is communicated with the inner cavity of the volute assembly through the air inlet portion. The sound absorption cavity is communicated with the inner cavity of the volute assembly through the sound absorption portion. Compared with the prior art, the sound absorption cavity is formed between the air inlet cover and the outer wall of the volute assembly. The sound absorption cavity is communicated with the inner cavity of the volute assembly, so that the noise reduction effect is achieved without the need of arranging a noise reduction structure at the air outlet of the volute. The noise reduction effect is good without increasing the volume of the fresh air module.

Description

TECHNICAL FIELD

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

[0002] At present, with the attention of people to the healthy air environment, more and more air conditioners begin to increase the health air function, and the fresh air is one of the important ones. However, due to the limitation of the installation condition of the air conditioner, the fresh air pipe diameter of the fresh air conditioner is generally small, and under the condition of large fresh air volume, the wind speed in the fresh air pipe will be very fast, and the friction between the air and the pipe wall will produce a harsh noise, which will affect the user's experience when the fresh air duct is transmitted into the indoor.

[0003] The existing air conditioner often adopts a separate noise reduction structure when reducing noise, such as setting the noise reduction structure at the air outlet of the fresh air duct or the outer wall surface of the fan volute. However, this way needs to increase additional parts, resulting in a large volume of the fresh air module, and also needs the corresponding installation process, increasing the production cost of the product. SUMMARY

[0004] The present application provides a fresh air module to solve the technical problem that the fresh air module in the prior art has a large volume due to the addition of a noise reduction structure.

[0005] To achieve the above-mentioned purpose, the fresh air module provided by the present application comprises a volute assembly, a fan and an air inlet cover, the volute assembly is provided with an air inlet portion and a sound absorption portion; the fan is arranged in the inner cavity of the volute assembly; the air inlet cover is connected to the outer wall of the volute assembly, and a cavity is formed between the air inlet cover and the outer wall of the volute assembly, the cavity is divided into an air inlet cavity and a sound absorption cavity; wherein the air inlet cavity is communicated with the inner cavity of the volute assembly through the air inlet portion, and the sound absorption cavity is communicated with the inner cavity of the volute assembly through the sound absorption portion.

[0006] Optionally, in an embodiment, the air inlet cavity and the sound absorption cavity are arranged along the radial direction of the rotation of the fan.

[0007] Optionally, in an embodiment, the sound absorption cavity is further divided into a first sound absorption cavity and a second sound absorption cavity, and the first sound absorption cavity and the second sound absorption cavity are arranged along the axial direction of the rotation axis of the fan.

[0008] Optionally, in an embodiment, the volute assembly comprises a volute body and a filter screen frame, the volute body, the filter screen frame and the air inlet cover are arranged in sequence along the rotation axis of the fan; the air inlet cover is provided with a first partition plate and a second partition plate, the air inlet cover, the first partition plate and the second partition plate enclose a cavity, which is the first sound absorption cavity; the filter screen frame comprises a limiting side plate and a mounting panel, the air inlet part and the sound absorption part are arranged on the mounting panel, the sound absorption part, the limiting side plate and the second partition plate enclose the second sound absorption cavity.

[0009] Optionally, in an embodiment, the volute assembly comprises a volute body and a filter screen frame, the volute body, the filter screen frame and the air inlet cover are arranged in sequence along the rotation axis of the fan; the air inlet cover is provided with a first partition plate, the filter screen frame comprises a limiting side plate and a mounting panel, the air inlet part and the sound absorption part are arranged on the mounting panel, the air inlet cover, the first partition plate, the sound absorption part and the limiting side plate enclose a cavity, which is the sound absorption cavity; the filter screen frame is further provided with a second partition plate, the second partition plate, the air inlet cover and the first partition plate enclose a cavity, which is the first sound absorption cavity, and the second partition plate, the limiting side plate and the sound absorption part enclose a cavity, which is the second sound absorption cavity.

[0010] Optionally, in an embodiment, the sound absorption part is provided with a plurality of first circular through holes, the diameter of the first circular through holes is between 1mm and 2.5mm; and / or, the second partition plate is provided with a plurality of second circular through holes, the diameter of the second circular through holes is between 2mm and 3.5mm.

[0011] Optionally, in an embodiment, the second sound absorption cavity is completely or partially open on the side facing the air inlet part; the fresh air module further comprises a filter screen, the filter screen is placed in the cavity enclosed by the limiting side plate and the mounting panel, and the filter screen is inserted into the second sound absorption cavity from the side of the second sound absorption cavity facing the air inlet part.

[0012] Optionally, in an embodiment, the mounting panel is provided with a flow guide ring, the flow guide ring is provided with a convex edge extending towards the side of the air inlet cover; the convex edge abuts against the filter screen, so that the filter screen and the sound absorption part have a certain gap, and the limiting side plate, the sound absorption part, the convex edge and the filter screen enclose a sound insulation cavity.

[0013] Optionally, in an embodiment, a flow guide ring is arranged on the mounting panel, and a convex edge extending towards one side of the air inlet hood is arranged at the periphery of the flow guide ring, and the convex edge abuts against the second partition plate, so that the second sound absorption cavity is closed towards one side of the air inlet portion.

[0014] Optionally, in an embodiment, the volute assembly comprises a volute body and a filter screen frame, and the volute body, the filter screen frame and the air inlet hood are sequentially arranged along the rotation axis of the fan; the filter screen frame comprises a limiting side plate and a mounting panel, and the air inlet portion and the sound absorption portion are arranged on the mounting panel; a first partition plate is arranged on the air inlet hood and / or the filter screen frame, and the first partition plate, the air inlet hood, the limiting side plate and the sound absorption portion enclose a cavity, which is the sound absorption cavity.

[0015] Optionally, in an embodiment, a flow guide ring is arranged on the mounting panel, and a convex edge extending towards one side of the air inlet hood is arranged at the periphery of the flow guide ring; the fresh air module further comprises a filter screen, and the filter screen is arranged in a filter screen mounting cavity enclosed by the limiting side plate, the mounting panel and the convex edge; an opening for the filter screen to pass through is arranged on the first partition plate, and the filter screen is inserted into the sound absorption cavity from the filter screen mounting cavity.

[0016] Optionally, in an embodiment, the sound absorption cavity is filled with sound absorption material.

[0017] Optionally, in an embodiment, the fresh air module further comprises an air inlet pipe, and the air inlet pipe is installed on the air inlet hood and communicates with the air inlet cavity; the first partition plate is arranged in a concave arc shape, and one end of the partition plate is located at the connection between the air inlet pipe and the air inlet cavity.

[0018] The application further provides an air conditioner comprising the fresh air module.

[0019] The fresh air module provided by the application forms an air inlet cavity and a sound absorption cavity by arranging an air inlet portion and a sound absorption portion on a volute assembly and enclosing a cavity formed between an air inlet hood and the volute assembly, the air inlet cavity communicates with the inner cavity of the volute through the air inlet portion, and the sound absorption cavity communicates with the inner cavity of the volute through the sound absorption portion. Compared with the prior art in which a noise reduction structure is added at the air outlet of the volute, in the application, only a sound insulation cavity needs to be formed between the air inlet hood and the outer wall of the volute assembly, and the noise reduction effect can be achieved by connecting the sound insulation cavity with the inner cavity of the volute, without the need to additionally arrange a noise reduction structure at the air outlet of the volute. The fresh air module can achieve a good noise reduction effect without increasing the volume of the fresh air module, and has a simple structure, is easy to produce, and is conducive to reducing the production cost of the product. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or prior art description will be briefly introduced. Obviously, the drawings in the following description only represent some of the embodiments of the present application, and all other drawings obtained by those skilled in the art without creative effort based on these drawings also belong to the protection scope of the present application.

[0021] Figure 1 The exploded view of the fresh air module provided by the present application is shown in the figure.

[0022] Figure 2 The cross-sectional view of the fresh air module provided by the present application is shown in the figure.

[0023] Figure 3 The cross-sectional view of the fresh air module provided by the present application is shown in the figure.

[0024] Figure 4 The structural view of the filter screen frame provided by the present application is shown in the figure.

[0025] Figure 5 The assembly view of the filter screen frame and the filter screen provided by the present application is shown in the figure.

[0026] Figure 6 The structural view of the second partition plate provided by the present application is shown in the figure.

[0027] Figure 7 The cross-sectional view of the fresh air module provided by the present application is shown in the figure.

[0028] Figure 8 The cross-sectional view of another embodiment of the fresh air module provided by the present application is shown in the figure.

[0029] Explanation of the reference signs:

[0030] Reference Name Reference Name Reference Name 10 Volute assembly 124 Convex edge 341 Second circular through hole 11 Volute body 20 Fan 35 First guide vane 12 Filter screen frame 30 Air inlet cover 351 Flat section 121 Limiting side plate 31 Air inlet cavity 352 Arc section 122 Mounting panel 32 Sound absorption cavity 36 Second guide vane 1221 Air inlet part 321 First sound absorption cavity 361 First guide part 1222 Sound absorption part 322 Second sound absorption cavity 362 Second guide part 1223 First circular through hole 33 First partition plate 40 Filter screen 123 Flow guide ring 34 Second partition plate 50 Air inlet pipe

[0031] The implementation, functional features and advantages of the present application will be further described with reference to the embodiments and the drawings. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments only represent some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative effort also belong to the protection scope of the present application.

[0033] The embodiment of the present application provides a fresh air module to solve the technical problem that the volume of the fresh air module is large due to the increase of the noise reduction structure in the prior art. The following will be described with reference to the drawings.

[0034] In the embodiment of the present application, as shown in the figure, Figures 1-4 The fresh air module comprises a volute assembly 10, a fan 20 and an air inlet cover 30. The volute assembly 10 is provided with an air inlet part 1221 and a sound absorption part 1222. The fan 20 is arranged in the inner cavity of the volute assembly 10. The air inlet cover 30 is connected to the outer wall of the volute assembly 10. A cavity is formed between the air inlet cover 30 and the outer wall of the volute assembly 10. The cavity is divided into an air inlet cavity 31 and a sound absorption cavity 32. The air inlet cavity 31 communicates with the inner cavity of the volute assembly 10 through the air inlet part 1221. The sound absorption cavity 32 communicates with the inner cavity of the volute assembly 10 through the sound absorption part 1222.

[0035] It should be noted that due to the limitation of the installation conditions of the air conditioner, the diameter of the fresh air pipe of the fresh air conditioner is generally small. Under the condition of large fresh air volume, the wind speed in the fresh air pipe will be very fast. The friction between the air and the pipe wall will produce a harsh noise, which will affect the user's experience when the fresh air duct is transmitted into the room. The existing air conditioner often adds a separate noise reduction structure when reducing noise, such as setting the noise reduction structure at the air outlet of the fresh air duct or the outer wall of the fan volute. However, this method requires additional components, resulting in a large volume of the fresh air module, and also requires a corresponding installation process, increasing the production cost of the product.

[0036] Therefore, the fresh air module provided by the present application divides the cavity formed between the air inlet cover 30 and the volute assembly 10 into an air inlet cavity 31 and a sound absorption cavity 32 by arranging the air inlet part 1221 and the sound absorption part 1222 on the volute assembly 10. The air inlet cavity 31 communicates with the inner cavity of the volute through the air inlet part 1221. The sound absorption cavity 32 communicates with the inner cavity of the volute through the sound absorption part 1222. Compared with the prior art of adding a noise reduction structure at the air outlet of the volute, only a sound insulation cavity needs to be formed between the air inlet cover 30 and the outer wall of the volute assembly 10 in the present application. The noise reduction effect can be achieved by connecting the sound insulation cavity with the inner cavity of the volute. No additional noise reduction structure needs to be arranged at the air outlet of the volute. The fresh air module can achieve good noise reduction effect without increasing the volume, and the structure is simple and easy to produce, which is helpful to reduce the production cost of the product.

[0037] It can be understood that the fresh air module is installed on the indoor unit of the air conditioner to provide fresh air to the indoor to improve the indoor air quality. Of course, the fresh air module can also be used on the fresh air machine 20 alone. The fresh air module further comprises an air inlet pipe 50. One end of the air inlet pipe 50 communicates with the outdoor. The other end of the air inlet pipe 50 is connected with the air inlet cover 30, and the air inlet pipe 50 is in communication with the air inlet cavity 31, so as to introduce the fresh outdoor air into the inside of the fresh air module through the air inlet pipe 50.

[0038] The fan 20 can be a centrifugal fan 20 including a centrifugal impeller and a motor fixed on the inner wall of the volute, and the centrifugal impeller is connected with the output shaft of the motor. When the fresh air module is started, the motor drives the centrifugal impeller to rotate and generate suction, so that outdoor air enters the air inlet cavity 31 through the air inlet pipe 50. The centrifugal impeller sucks the air in the air inlet cavity 31 from the air inlet of the volute and discharges it from the air outlet of the volute, thereby introducing fresh air into the room, reducing the carbon dioxide concentration in the room, and improving the indoor air quality.

[0039] Specifically, please refer to Figure 1 The air inlet cover 30 is open at one end and covers the volute assembly 10, so that the air inlet cover 30 and the volute assembly 10 form a cavity therebetween. In this embodiment, a partition can be added in the cavity to separate the cavity into an air inlet cavity 31 and a sound absorption cavity 32. The air inlet cover 30 and the volute can be connected by buckles, screws or a combination of buckles and screws. In an alternative embodiment, a plurality of buckles are arranged at the open edge of the air inlet cover 30, and a plurality of lugs are arranged at the corresponding position of the volute assembly 10, and the lugs are provided with a clamping groove, so that the volute assembly 10 and the air inlet cover 30 are connected and fixed by the cooperation of the buckles and the clamping grooves.

[0040] In this embodiment, a plurality of micro-holes can be arranged on the sound absorption part 1222. The plurality of micro-holes are arranged on the sound absorption part 1222. The sound absorption cavity 32 and the inner cavity of the volute assembly 10 are connected through the plurality of micro-holes. Through the cooperation of the plurality of micro-holes and the sound absorption cavity 32, a Helmholtz resonance cavity can be formed in the fresh air module. According to the Helmholtz sound absorption principle, the noise generated by the rotation of the fan 20 and the noise generated by the impact of the air inlet flow on the inner wall of the air inlet cover 30 can enter the sound absorption cavity 32 through the plurality of micro-holes. When the sound wave passes through the plurality of micro-holes, it will be scattered by the structure of the hole surface, so that the sound wave is reflected and scattered in different directions, thereby dispersing a large amount of sound wave energy. Therefore, in this embodiment, only the sound absorption cavity 32 is arranged between the air inlet cover 30 and the volute assembly 10. By connecting the sound absorption cavity 32 with the inner cavity of the volute assembly 10, most of the noise can be absorbed, the noise in the fresh air module is effectively reduced, the operation quality of the fresh air module is improved, and the user experience is improved.

[0041] Since the sound absorption part 1222 is arranged on the volute assembly 10, that is, the sound absorption part 1222 is arranged towards the fan 20, it can be known that the plurality of micro-holes on the sound absorption part 1222 are also arranged towards the fan 20, so as to be beneficial to absorbing the noise generated in the rotating process of the fan 20, so that the sound wave can directly enter the sound absorption cavity 32 through the plurality of micro-holes, and the sound wave will be reflected and scattered when passing through the plurality of micro-holes, thereby dissipating a large amount of sound wave energy, and achieving a good noise reduction effect.

[0042] Optionally, in an embodiment, referring to Figures 1-3 , the air inlet cavity 31 and the sound absorption cavity 32 are arranged along the radial direction of the rotation of the fan 20. It can be understood that, since the air inlet cavity 31 and the sound absorption cavity 32 both need to be in communication with the inner cavity of the volute assembly 10, arranging the air inlet cavity 31 and the sound absorption cavity 32 along the radial direction of the rotation of the fan 20 is beneficial to simplifying the overall structure of the fresh air module, while not affecting the air inlet effect of the air inlet cover 30. In order to further simplify the structure of the fresh air module, the air inlet part 1221 and the sound absorption part 1222 can also be arranged along the radial direction of the rotation of the fan 20, and the air inlet part 1221 and the air inlet cavity 31 can be arranged along the axial direction of the rotation of the fan 20, and the sound absorption cavity 32 and the sound absorption part 1222 are arranged along the axial direction of the rotation of the fan 20.

[0043] Optionally, in an embodiment, referring to Figure 1 and Figure 3 , the sound absorption cavity 32 is further divided into a first sound absorption cavity 321 and a second sound absorption cavity 322, and the first sound absorption cavity 321 and the second sound absorption cavity 322 are arranged along the axial direction of the rotation of the fan 20. In this embodiment, a partition can be arranged in the sound absorption cavity 32, and the partition can be arranged perpendicular to the axis of the fan 20, so as to divide the sound absorption cavity 32 into the first sound absorption cavity 321 and the second sound absorption cavity 322 by using the partition, and by arranging the first sound absorption cavity 321 and the second sound absorption cavity 322 along the axial direction of the rotation of the fan 20, a plurality of Helmholtz resonance cavities can be formed between the air inlet cover 30 and the outer wall of the volute assembly 10, and the plurality of Helmholtz resonance cavities are used to absorb the noise in the volute assembly 10, thereby further reducing the noise inside the fresh air module.

[0044] Optionally, in an embodiment, referring to Figures 1-4 and Figure 6The volute assembly 10 comprises a volute body 11 and a filter screen frame 12, the volute body 11, the filter screen frame 12 and the air inlet cover 30 are arranged in sequence along the rotation axis of the fan 20; the air inlet cover 30 is provided with a first partition plate 33 and a second partition plate 34, the air inlet cover 30, the first partition plate 33 and the second partition plate 34 enclose a cavity which is a first sound absorption cavity 321; the filter screen frame 12 comprises a limiting side plate 121 and a mounting panel 122, an air inlet part 1221 and a sound absorption part 1222 are arranged on the mounting panel 122, the sound absorption part 1222, the limiting side plate 121 and the second partition plate 34 enclose a second sound absorption cavity 322.

[0045] Specifically, the volute body 11 is provided with an open side, and the filter screen frame 12 is arranged at the open side of the volute body 11, so as to use the filter screen frame 12 as a partial sealing structure of the volute body 11, thereby facilitating the reduction of structural components of the fresh air module and the reduction of production cost of the fresh air module. The filter screen frame 12 is arranged between the air inlet covers 30 of the volute body 11, and the filter screen frame 12 can be slidingly arranged on the air inlet covers 30 or the volute body 11, the mounting panel 122 has a flat plate structure, and the limiting side plate 121 is arranged at the periphery of the mounting panel 122. In this embodiment, a protruding rib can be arranged on the limiting side plate 121, and a sliding rail can be arranged on the air inlet cover 30 or the volute body 11, so as to realize the sliding connection between the filter screen frame 12 and the air inlet cover 30 or the volute body 11 by the cooperation of the protruding rib and the sliding rail. When the filter screen frame 12 is installed, the protruding rib is aligned with the sliding rail, and then the filter screen frame 12 is pushed inward to realize the installation of the filter screen frame 12, thereby simplifying the installation mode of the filter screen frame 12.

[0046] Further, the air inlet cover 30 comprises a bottom wall and a side wall connected with the periphery of the bottom wall, the air inlet pipe 50 is connected with the side wall, the bottom wall has a flat plate structure and a reinforcing rib can be arranged on the side of the bottom wall away from the side wall, the reinforcing rib has a ring grid structure to increase the structural strength of the air inlet cover 30. The first partition plate 33 is sealingly connected with the side wall on both sides in the air inlet direction, the side of the first partition plate 33 away from the filter screen frame 12 is sealingly connected with the bottom wall, and the side of the first partition plate 33 away from the bottom wall extends towards the filter screen frame 12, so as to divide the cavity enclosed by the air inlet cover 30 and the filter screen frame 12 into an air inlet cavity 31 and a sound absorption cavity 32 by the first partition plate 33. The second partition plate 34 is arranged in the sound absorption cavity 32, and the second partition plate 34 is connected with the first partition plate 33 and the side wall, so as to divide the sound absorption cavity 32 into the first sound absorption cavity 321 and the second sound absorption cavity 322 arranged along the rotation axis of the fan 20 by the second partition plate 34.

[0047] In some embodiments, the first partition plate 33 is integrally formed with the air inlet hood 30. The integral structure is conducive to increasing the stability of the fresh air module structure and performance, and facilitates molding and simple manufacturing, thereby eliminating the need for additional assembly parts and connection procedures, improving the installation efficiency of the fresh air module, and reducing the production cost of the product.

[0048] Optionally, in an embodiment, referring to Figures 1-4 and Figure 6 , the volute assembly 10 includes a volute body 11 and a filter screen frame 12, and the volute body 11, the filter screen frame 12 and the air inlet hood 30 are sequentially arranged along the rotation axis of the fan 20. The air inlet hood 30 is provided with a first partition plate 33, the filter screen frame 12 includes a limiting side plate 121 and a mounting panel 122, an air inlet portion 1221 and a sound absorption portion 1222 are arranged on the mounting panel 122, and the air inlet hood 30, the first partition plate 33, the sound absorption portion 1222 and the limiting side plate 121 enclose a cavity as a sound absorption cavity 32. The filter screen frame 12 is further provided with a second partition plate 34, the second partition plate 34 and the air inlet hood 30 and the first partition plate 33 enclose a cavity as a first sound absorption cavity 321, and the second partition plate 34 and the limiting side plate 121 and the sound absorption portion 1222 enclose a cavity as a second sound absorption cavity 322.

[0049] The difference between the present embodiment and the above-mentioned embodiments is that the second partition plate 34 is arranged on the filter screen frame 12, i.e., the second partition plate 34 is connected with the limiting side plate 121. By arranging the second partition plate 34 on the filter screen frame 12, since the filter screen frame 12 is slidably arranged on the volute body 11 or the air inlet hood 30, the assembly of the fresh air module is facilitated, and the installation efficiency is improved.

[0050] In the present embodiment, in order to ensure the sealing performance of the first sound absorption cavity 321 and achieve a better noise reduction effect, the first partition plate 33 extends towards the filter screen frame 12 on the side away from the bottom wall, and the second partition plate 34 is sealingly connected with the limiting side plate 121 and the first partition plate 33, respectively.

[0051] Optionally, in an embodiment, referring to Figures 2-4 , the sound absorption portion 1222 is provided with a plurality of first circular through holes 1223, and the diameter of the first circular through holes 1223 is between 1 mm and 2.5 mm; and / or, the second partition plate 34 is provided with a plurality of second circular through holes 341, and the diameter of the second circular through holes 341 is between 2 mm and 3.5 mm.

[0052] It should be noted that in order to ensure that the fresh air module can play a better noise reduction effect, the diameter and arrangement density of the first circular through hole 1223 and the second circular through hole 341 need to be set according to the frequency of the noise, the hole diameter of the first circular through hole 1223 is preferably 1-2.5mm, the spacing between the adjacent two first circular through holes 1223 is preferably 4-5mm, and the porosity is preferably 30%-60%. In order to facilitate the cooperation between the second circular through hole 341 and the first circular through hole 1223 to achieve better noise reduction effect, the hole diameter of the plurality of second circular through holes 341 is preferably between 2-3.5mm, the spacing between the adjacent two second circular through holes 341 is preferably between 4-5mm, and the porosity is preferably 25%-50%.

[0053] In other embodiments of the present application, a plurality of long strip-shaped through holes can also be provided on the sound absorption part 1222. Compared with the circular through hole, the long strip-shaped through hole can be set to be smaller in width and reduce the processing difficulty, which is beneficial to reducing the production cost of the product while ensuring the noise reduction effect of the product. Of course, a plurality of honeycomb-shaped through holes or other irregular-shaped through holes can also be provided on the sound absorption part 1222, which is not limited in the present application. Similarly, a plurality of long strip-shaped through holes or a plurality of honeycomb-shaped through holes can also be provided on the second partition plate 34, which is not limited in the present application.

[0054] Optionally, in an embodiment, referring to Figures 3-5 , one side of the second sound absorption cavity 322 facing the air inlet part 1221 is provided as completely open or partially open; the fresh air module further comprises a filter screen 40, the filter screen 40 is placed in the cavity enclosed by the limiting side plate 121 and the mounting panel 122, and the filter screen 40 is inserted into the second sound absorption cavity 322 from one side of the second sound absorption cavity 322 facing the air inlet part 1221.

[0055] Specifically, one side of the second sound absorption cavity 322 facing the air inlet part 1221 is provided as open, that is, the second sound absorption cavity 322 is in communication with the air inlet cavity 31. Since the sound absorption part 1222 is provided with a plurality of first circular through holes 1223, after the airflow in the air inlet cavity 31 passes through the filter screen 40, part of the airflow enters the volute assembly 10 from the air inlet part 1221, and the other part of the airflow enters the volute assembly 10 through the first circular through hole 1223. That is, the sound absorption part 1222 can not only play a noise reduction role, but also supply part of the fresh air into the volute assembly 10, which is beneficial to reducing the air volume loss and further improving the amount of fresh air entering the room, thereby improving the user experience.

[0056] It can be understood that due to the high air pressure in the air inlet cavity 31 and the fast flow speed of the airflow, vortex is easily generated in the air inlet cavity 31, and further, noise is generated. When the high-speed airflow in the air inlet cavity 31 enters the volute assembly 10 through the plurality of first circular micro-holes, airflow injection phenomenon is generated, which can convert the small-flow high-speed airflow into large-flow low-speed airflow. When the airflow passes through the plurality of first circular micro-holes, fine turbulence is generated, and further, relatively pure aerodynamic noise is obtained. The plurality of first circular micro-holes can also function as airflow rectification and discharge, which is beneficial to eliminate vortex at the filter screen frame 12, and further reduces noise.

[0057] In the embodiment, the filter screen is inserted into the second sound absorption cavity 322, so that the noise entering the second sound absorption cavity 322 is absorbed by the filter screen 40, and the noise inside the fresh air module is further reduced.

[0058] Optionally, in an embodiment, referring to Figure 4 and Figure 5 , the mounting panel 122 is provided with a flow guide ring 123, and the periphery of the flow guide ring 123 is provided with a convex edge 124 extending towards one side of the air inlet cover 30; the convex edge 124 abuts against the filter screen 40, so that the filter screen 40 and the sound absorption part 1222 have a certain gap therebetween, and the sound insulation cavity is formed by the limiting side plate 121, the sound absorption part 1222, the convex edge 124 and the filter screen.

[0059] Specifically, the flow guide ring 123 is used to guide the airflow in the air inlet cavity 31 to enter the volute assembly 10, and further improve the working efficiency of the fan 20. The convex edge 124 is approximately arc-shaped, and the opposite sides of the convex edge 124 are connected with the limiting side plate 121. The convex edge 124 is used to guide the airflow in the air inlet cavity 31 to enter the volute, and on the other hand, the convex edge 124 can ensure that the filter screen 40 has a certain distance from the air inlet part 1221, which is beneficial to ensure the balance of the flow field inside the fresh air module, and avoid the problem that the airflow impacts due to uneven pressure between the air inlet cavity 31 and the volute assembly 10, and further generates noise.

[0060] In the embodiment, the sound insulation cavity is formed by the limiting side plate 121, the sound absorption part 1222, the convex edge 124 and the filter screen, and the sound absorption part 1222 can be communicated with the inner cavity of the volute assembly 10 through the plurality of first circular micro-holes. In this way, the Helmholtz resonance cavity is formed between the filter screen 40 and the filter screen frame 12, and further, the noise inside the fresh air module is reduced.

[0061] Optionally, in an embodiment, referring to Figures 3-5The flow guide ring 123 is provided on the mounting panel 122, and the peripheral edge of the flow guide ring 123 is provided with a convex edge 124 extending towards one side of the air inlet cover 30, the convex edge 124 abuts against the second partition plate 34, so that the second sound absorption cavity 322 is closed towards one side of the air inlet part 1221. The fresh air module further comprises a filter screen 40, which is placed in a filter screen mounting cavity formed by the limiting side plate 121, the mounting panel 122 and the convex edge 124.

[0062] The difference between the embodiment and the above-mentioned embodiments is that the second sound absorption cavity 322 is closed towards one side of the air inlet part 1221, so that the airflow in the air inlet cavity 31 only enters the inside of the volute assembly 10 through the air inlet part 1221, and the filter screen 40 can be installed above the flow guide ring 123 and extend towards the side away from the second sound absorption cavity 322. In this way, the first sound absorption cavity 321 and the second sound absorption cavity 322 can be formed between the air inlet cover 30 and the volute assembly 10 along the rotation axis of the fan 20.

[0063] When noise is generated inside the fresh air module, the sound wave first enters the second sound absorption cavity 322 through the sound absorption part 1222. Since the sound wave is scattered by the surface structure of the sound absorption part 1222 when passing through the sound absorption part 1222, the sound wave is reflected and scattered in all directions. Then, the sound wave in the second sound absorption cavity 322 enters the first sound absorption cavity 321 through the second partition plate 34. The sound wave is further dispersed when passing through the second partition plate 34, thereby achieving a double-layer noise reduction effect and effectively reducing the noise generated inside the fresh air module.

[0064] Optionally, in an embodiment, referring to Figure 1 and Figure 4 The volute assembly 10 comprises a volute body 11 and a filter screen frame 12, and the volute body 11, the filter screen frame 12 and the air inlet cover 30 are arranged along the rotation axis of the fan 20 in sequence. The filter screen frame 12 comprises a limiting side plate 121 and a mounting panel 122, and the air inlet part 1221 and the sound absorption part 1222 are arranged on the mounting panel 122. The air inlet cover 30 and / or the filter screen frame 12 is provided with a first partition plate 33, and the cavity formed by the air inlet cover 30, the limiting side plate 121 and the sound absorption part 1222 is a sound absorption cavity 32.

[0065] In the embodiment, the two sides of the first partition plate 33 along the air inlet direction are respectively sealingly connected with the side wall, and the side of the first partition plate 33 away from the filter screen frame 12 is sealingly connected with the bottom wall. The side of the first partition plate 33 away from the bottom wall extends along one side of the filter screen frame 12, so that the first partition plate 33 can abut against the limiting side plate 121 and the mounting panel 122 at the same time. That is, in the embodiment, only the first partition plate 33 needs to be arranged to form a Helmholtz resonance cavity between the air inlet cover 30 and the outer wall of the volute assembly 10, which is conducive to simplifying the structure of the fresh air module, improving production efficiency and reducing production cost.

[0066] Optionally, in an embodiment, referring to Figure 4 and Figure 5 , the mounting panel 122 is provided with a flow guide ring 123, and the flow guide ring 123 is provided with a convex edge 124 extending towards one side of the air inlet hood 30; the fresh air module further comprises a filter screen 40, and the filter screen 40 is placed in a filter screen mounting cavity formed by the limiting side plate 121, the mounting panel 122 and the convex edge 124; the first partition plate 33 is provided with an opening for the filter screen 40 to pass through, and the filter screen 40 is inserted into the sound absorption cavity 32 from the filter screen mounting cavity.

[0067] Since the first partition plate 33 extends to the inside of the filter screen frame 12 and abuts against the mounting panel 122, in this embodiment, an opening with a size suitable for the thickness of the filter screen is arranged on the first partition plate 33, so that the filter screen is inserted into the sound absorption cavity 32 through the opening, thereby absorbing the noise in the sound absorption cavity 32 by the filter screen, and further reducing the noise inside the fresh air module.

[0068] Optionally, in an embodiment, the sound absorption cavity 32 is filled with sound absorption material. The sound absorption material can be sponge, cotton cloth, knitted cotton or other flexible materials with sound absorption effect and having certain density and thickness and being compressible. By filling the sound absorption cavity 32 with sound absorption cotton, the noise in the fresh air module can be absorbed, and the noise inside the fresh air module is further reduced.

[0069] Optionally, in an embodiment, the fresh air module further comprises an air inlet pipe 50, and the air inlet pipe 50 is installed on the air inlet hood 30 and communicates with the air inlet cavity 31; the first partition plate 33 is arranged in a concave arc shape, and one end of the partition plate is located at the connection between the air inlet pipe 50 and the air inlet cavity 31.

[0070] It can be understood that since the airflow entering the air inlet cavity 31 from the air inlet pipe 50 is a straight airflow, the straight airflow will expand gradually after being blown out of the outlet of the air inlet pipe 50 and directly impact the side wall of the air inlet cavity 31 opposite to the air inlet pipe 50 along the air inlet direction of the straight airflow, and then is divided into two airflows, one of which is an effective working airflow and the other of which is a vortex airflow, thereby forming a vortex loss, which not only reduces the air volume of the fresh air module, but also increases the noise inside the fresh air module.

[0071] To this end, in the embodiment, the first partition plate 33 is arranged in an arc shape, so that the airflow in the air inlet pipe 50 can directly blow to the inner side of the first partition plate 33, the arc-shaped first partition plate 33 can guide the airflow, which is beneficial to avoid the airflow introduced from the air inlet pipe 50 directly blowing to the side wall of the air inlet cavity 31 opposite to the air inlet pipe 50, thereby reducing the airflow loss caused by the gradual expansion of the airflow or the direct impact of the airflow on the side wall of the air inlet cavity 31, and at the same time, the arc-shaped first partition plate 33 is beneficial to guide the airflow to the center of the guide ring 123 with high air inlet efficiency, thereby improving the working efficiency of the fresh air module, and further ensuring the fresh air volume.

[0072] Optionally, in an embodiment, referring to Figure 2 and Figure 7 , the air inlet cavity 31 is provided with a first guide vane 35, and the first guide vane 35 is arranged in the radial direction of the outlet of the air inlet pipe 50 and is spaced apart from the first partition plate 33.

[0073] Specifically, referring to Figure 7 , the extension direction of the planar section 351 is consistent with the air inlet direction of the airflow, the arc-shaped section 352 is curved in the counterclockwise direction, and the arc-shaped section 352 is curved to the center position of the guide ring 123 and the wind wheel. By arranging the planar section 351, it can be ensured that the airflow entering the air inlet cavity 31 from the air inlet pipe 50 will not immediately expand, which is beneficial to improve the airflow organization state, reduce the vortex intensity, avoid the airflow flow separation and vortex flow caused by the airflow flow separation, and reduce the air volume loss. By arranging the arc-shaped section 352, a large amount of airflow can be guided to the center position of the guide ring 123 with high air inlet efficiency, thereby improving the working efficiency of the fresh air module.

[0074] In the embodiment, the first partition plate 33 and the first guide vane 35 are arranged in the radial direction of the outlet of the air inlet pipe 50 and are spaced apart, and the first partition plate 33 and the first guide vane 35 are used to guide the airflow on both sides, which is beneficial to prevent the airflow flow separation, greatly improves the working efficiency of the fresh air module, and improves the fresh air volume entering the room.

[0075] Optionally, in an embodiment, referring to Figure 8 , the air inlet cavity 31 is provided with a second guide vane 36, the second guide vane 36 extends and branches into a first guide part 361 and a second guide part 362 in the air inlet direction of the air inlet pipe 50, and the first guide part 361 and the second guide part 362 are both in an arc shape.

[0076] Specifically, the connection between the first flow guide part 361 and the second flow guide part 362 is located at the center of the outlet of the air inlet pipe 50, and the first flow guide part 361 and the second flow guide part 362 are both arc-shaped sheet structures arranged according to the profile of a volute. When the airflow of the air inlet pipe 50 enters the air inlet cavity 31, the straight airflow is divided into two rotating airflows through the flow guide of the first flow guide part 361 and the second flow guide part 362, thereby reducing the airflow loss caused by the gradual expansion or impact of the airflow.

[0077] The end of the first flow guide part 361 close to the air inlet pipe 50 is connected to the end of the second flow guide part 362 close to the air inlet pipe 50, and the other end of the first flow guide part 361 and the other end of the second flow guide part 362 are curved in the same direction. It can be understood that the end of the first flow guide part 361 away from the air inlet pipe 50 is curved in the counterclockwise direction, and the end of the second flow guide part 362 away from the air inlet pipe 50 is also curved in the counterclockwise direction. Through the arrangement of the second flow guide sheet 36, it is beneficial to avoid the gradual expansion, thereby improving the air inlet capacity of the air inlet assembly and ensuring the fresh air volume of the fresh air module.

[0078] The embodiment of the present application also provides an air conditioner, which comprises a fresh air module. The specific structure of the fresh air module is referred to the above-mentioned embodiments. Since the air conditioner adopts all the technical solutions of the above-mentioned embodiments, it at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be described one by one here.

[0079] In the above-mentioned embodiments, the description of each embodiment has its own focus, and the parts not described in detail in a certain embodiment can be referred to the related description of other embodiments. In the description of the present application, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first" and "second" can explicitly or implicitly include one or more features.

[0080] The above has introduced in detail the fresh air module provided by the embodiments of the present application. The specific examples are applied to the description of the principles and implementation modes of the present application. The above-mentioned embodiment is only used to help understand the method and core idea of the present application; at the same time, for those skilled in the art, according to the idea of the present application, the specific implementation mode and application range will be changed; in conclusion, the content of the specification should not be understood as the limitation of the present application.

Claims

1. A fresh air module, characterized in that The application relates to a new air module. The new air module comprises a volute assembly, a fan, an air inlet cover and a filter screen frame. The volute assembly is provided with an air inlet part and an acoustic absorption part. The fan is arranged in the inner cavity of the volute assembly. The air inlet cover is connected to the outer wall of the volute assembly. The air inlet cover and the outer wall of the volute assembly form a cavity. The cavity is divided into an air inlet cavity and an acoustic absorption cavity. The air inlet cavity is communicated with the inner cavity of the volute assembly through the air inlet part. The acoustic absorption cavity is communicated with the inner cavity of the volute assembly through the acoustic absorption part.

2. Fresh air module according to claim 1, characterized in that The air inlet cavity and the acoustic absorption cavity are arranged along the rotation direction of the fan.

3. Fresh air module according to claim 2, characterized in that The volute assembly comprises a volute body and a filter screen frame.

4. Fresh air module according to claim 2, characterized in that The volute body, the filter screen frame and the air inlet cover are arranged along the rotation axis of the fan. The filter screen frame comprises a limiting side plate and a mounting panel.

5. Fresh air module according to claim 3 or 4, characterized in that The air inlet part and the acoustic absorption part are arranged on the mounting panel. The air inlet cover and / or the filter screen frame are provided with a first partition plate.

6. Fresh air module according to claim 3 or 4, characterized in that The first partition plate, the air inlet cover, the limiting side plate and the acoustic absorption part form the acoustic absorption cavity. The acoustic absorption cavity is further divided into a first acoustic absorption cavity and a second acoustic absorption cavity.

7. Fresh air module according to claim 6, characterized in that The first acoustic absorption cavity and the second acoustic absorption cavity are arranged along the rotation axis of the fan. The air inlet cover is provided with a first partition plate and a second partition plate.

8. Fresh air module according to claim 3 or 4, characterized in that The air inlet cover, the first partition plate and the second partition plate form the first acoustic absorption cavity. The acoustic absorption part, the limiting side plate and the second partition plate form the second acoustic absorption cavity. The air inlet cover is provided with a first partition plate. The air inlet cover, the first partition plate, the acoustic absorption part and the limiting side plate form the acoustic absorption cavity. The filter screen frame is further provided with a second partition plate. The second partition plate, the air inlet cover and the first partition plate form the first acoustic absorption cavity. The second partition plate, the limiting side plate and the acoustic absorption part form the second acoustic absorption cavity. The acoustic absorption part is provided with a plurality of first circular through holes. The diameter of the first circular through holes is between 1mm and 2.5mm. The second partition plate is provided with a plurality of second circular through holes. The diameter of the second circular through holes is between 2mm and 3.5mm. The second acoustic absorption cavity is completely or partially open towards the air inlet part. The new air module further comprises a filter screen. The filter screen is arranged in the cavity formed by the limiting side plate and the mounting panel. The mounting panel is provided with a flow guide ring. The flow guide ring is provided with a convex edge extending towards the air inlet cover. The convex edge and the filter screen abut each other. The limiting side plate, the acoustic absorption part, the convex edge and the filter screen form a sound insulation cavity. The mounting panel is provided with a flow guide ring. The flow guide ring is provided with a convex edge extending towards the air inlet cover. The convex edge and the second partition plate abut each other. The second acoustic absorption cavity is closed towards the air inlet part. The fresh air module further comprises a filter screen placed in a filter screen installation cavity formed by the limiting side plate, the installation panel and the convex edge.

9. The fresh air module of claim 1, wherein, A flow guide ring is arranged on the installation panel, and a convex edge extending towards one side of the air inlet cover is arranged at the periphery of the flow guide ring. The fresh air module further comprises a filter screen placed in a filter screen installation cavity formed by the limiting side plate, the installation panel and the convex edge. An opening for the filter screen to pass through is arranged on the first partition plate, and the filter screen is inserted into the sound absorption cavity from the filter screen installation cavity.

10. Fresh air module according to any of claims 1-2, characterized in that, The sound absorption cavity is filled with sound absorption material.

11. Fresh air module according to claim 3 or 4, characterized in that The fresh air module further comprises an air inlet pipe installed on the air inlet cover and in communication with the air inlet cavity. The first partition plate is arranged in a concave arc shape, and one end of the first partition plate is located at the connection between the air inlet pipe and the air inlet cavity.

12. An air conditioner characterized by comprising: The fresh air module comprises the fresh air module according to any one of claims 1-11.

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