EP4636252A1

EP4636252A1 - Volute assembly, fan assembly, and air treatment device

Info

Publication number: EP4636252A1
Application number: EP23902046.4A
Authority: EP
Inventors: Xingliang DENG; Yang Yao; Xiaohua Zhou
Original assignee: GD Midea Air Conditioning Equipment Co Ltd
Current assignee: GD Midea Air Conditioning Equipment Co Ltd
Priority date: 2022-12-16
Filing date: 2023-06-13
Publication date: 2025-10-22
Also published as: WO2024124834A1; EP4636252A4

Abstract

Provided are a volute assembly (100), a fan assembly (200), and an air treatment device (1000). The volute assembly (100) includes two side plates (110) arranged opposite to each other, an enclosing plate (120), and a protruding rib (130). At least one of the two side plates (110) has an air inlet through hole (111). The enclosing plate (120) is connected to each of the two side plates (110). The two side plates (110) cooperate with the enclosing plate (120) to define a mounting cavity (101). The enclosing plate (120) has an air outlet (121). The enclosing plate (120) includes a volute tongue (122) disposed adjacent to the air outlet (121) and an air duct plate (123) arranged opposite to the volute tongue (122). The protruding rib (130) is disposed at each of the two side plates (110) and located in the mounting cavity (101).

Description

CROSS-REFERENCES TO RELATED APPLICATIONS

This application claims priorities to Chinese Patent Applications No. 202211627558.3 and Chinese Patent Applications No. 202223426653.5, filed by GD MIDEA AIR-CONDITIONING EQUIPMENT CO., LTD. on December 16, 2022 and titled "VOLUTE ASSEMBLY, FAN ASSEMBLY, AND AIR TREATMENT DEVICE".

FIELD

The present disclosure relates to the technical field of air treatment devices, and in particular, to a volute assembly, a fan assembly, and an air treatment device.

BACKGROUND

In an air treatment device, noise is an important index affecting a using experience. Noise of the air treatment device partly comes from a volute assembly. A highspeed airflow causes air vibration that spreads inside the volute assembly, and the airflow impacts a volute tongue, resulting in high noise generated by the volute assembly and affecting the user's using experience.

SUMMARY

The present disclosure aims to at least solve one of the technical problems in the related art to some extent.
To this end, the present disclosure provides a volute assembly having an effect of reducing noise, improving a user's using experience.
The present disclosure further provides a fan assembly.
The present disclosure further provides an air treatment device.
The volute assembly according to the present disclosure comprises two side plates arranged opposite to each other, an enclosing plate, and a protruding rib. At least one of the two side plates has an air inlet through hole. The enclosing plate is connected to each of the two side plates. The two side plates cooperate with the enclosing plate to define a mounting cavity for installation of a fan. The enclosing plate has an air outlet. Each of the air outlet and the air inlet through hole is in communication with the mounting cavity. The enclosing plate comprises a volute tongue disposed adjacent to the air outlet and an air duct plate arranged opposite to the volute tongue. The protruding rib is disposed at the side plate and located in the mounting cavity. The protruding rib has an end connected to the air duct plate and an other end extending towards the volute tongue.
Therefore, according to the volute assembly of the present disclosure, the protruding rib is disposed in the mounting cavity. Moreover, the protruding rib is connected to the air duct plate. When the airflow flows from the air inlet through hole to the air outlet, the airflow will flow through the protruding rib. The protruding rib can obstruct circulation of the airflow, reduce a speed at which the airflow flows towards the air outlet, and change a flow direction of part of the airflow. In this way, a risk of airflow backflow is reduced, and problems such as noise or abnormal sound generated by impact of the airflow backflow on the volute tongue are reduced, to reduce the noise of the volute assembly.
Additional aspects and advantages of the present disclosure will be provided in part in the following description, or will become apparent in part from the following description, or can be learned from practicing of the present disclosure.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic structural view of an air treatment device according to an embodiment of the present disclosure.
FIG. 2 is an enlarged view at part A in FIG. 1.
FIG. 3 is an enlarged view at part B in FIG. 1.
FIG. 4 is a first schematic structural view of a volute assembly according to an embodiment of the present disclosure.
FIG. 5 is a first cross-sectional view of FIG. 1.
FIG. 6 is a second cross-sectional view of FIG. 1.
FIG. 7 is a second schematic structural view of a volute assembly according to an embodiment of the present disclosure.
FIG. 8 is a first cross-sectional view of FIG. 7.
FIG. 9 is a second cross-sectional view of FIG. 7.
FIG. 10 is a data comparison diagram of a volute assembly according to an embodiment of the present disclosure and a volute assembly in the related art.

DETAILED DESCRIPTION

Embodiments of the present disclosure will be described in detail below with reference to examples thereof as illustrated in the accompanying drawings, throughout which same or similar elements, or elements having same or similar functions, are denoted by same or similar reference numerals. The embodiments described below with reference to the drawings are illustrative only, and are intended to explain, rather than limiting, the present disclosure.
In the description of the present disclosure, it should be understood that, orientation or position relationship indicated by terms such as "length", "width", "thickness", "over", and "below" is based on the orientation or position relationship shown in the accompanying drawings, and is merely for the convenience of describing the present disclosure and simplifying the description, rather than indicating or implying that the associated device or element must have a specific orientation, or be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present disclosure. In addition, the features associated with "first" and "second" may explicitly or implicitly comprise at least one of the features. In the description of the present disclosure, unless otherwise defined, "plurality of" means at least two.
In the present disclosure, it should be noted that, unless otherwise clearly specified and limited, terms such as "install", "connect", "couple", and the like should be understood in a broad sense. For example, it may be a fixed connection or a detachable connection or connection as one piece; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate; or internal communication of two components. For those of ordinary skill in the art, the specific meaning of the above terms in the present disclosure should be understood according to specific circumstances.
A volute assembly 100 according to the embodiments of the present disclosure is described in detail below with reference to the accompanying drawings.
The volute assembly 100 according to the embodiments of the present disclosure comprises two side plates 110 arranged opposite to each other, an enclosing plate 120, and a protruding rib 130. At least one of the two side plates 110 has an air inlet through hole 111. The enclosing plate 120 is connected to each of the two side plates 110. The two side plates 110 cooperate with the enclosing plate 120 to define a mounting cavity 101 for installation of a fan 210. The enclosing plate 120 has an air outlet 121. Each of the air outlet 121 and the air inlet through hole 111 is in communication with the mounting cavity 101. The enclosing plate 120 comprises a volute tongue 122 disposed adjacent to the air outlet 121 and an air duct plate 123 arranged opposite to the volute tongue 122. The protruding rib 130 is disposed at the side plate 110 and located in the mounting cavity 101. The protruding rib 130 has an end connected to the air duct plate 123 and another end extending towards the volute tongue 122.
With reference to FIG. 1, FIG. 4, and FIG. 7, the two side plates 110 are spaced apart from each other. The enclosing plate 120 is disposed at an outer peripheral edge of each of the side plates 110, and is connected between the two side plates 110 arranged opposite to each other. The mounting cavity 101 is defined by the enclosing plate 120 and the two side plates 110 arranged opposite to each other. With reference to FIG. 5 and FIG. 6, the fan 210 is disposed inside the mounting cavity 101, and the enclosing plate 120 has an air outlet 121. The fan 210 can drive the airflow to flow from the air inlet through hole 111 into the mounting cavity 101 and out of the air outlet 121 to achieve air circulation. It should be noted that the air outlet 121 may be defined only by forming a hole on the enclosing plate 120. At this time, spacings occur between opposite side walls of the air outlet 121 and the two side plates 110, respectively. Alternatively, the enclosing plate 120 and the two side plates 110 together define a peripheral wall of the air outlet 121.
With reference to FIG. 4 and FIG. 7, the enclosing plate 120 comprises a volute tongue 122 disposed at a side of the air outlet 121. The volute tongue 122 extends from the air outlet 121 towards a side of the mounting cavity 101. The enclosing plate 120 further comprises an air duct plate 123 disposed at another side of the air outlet 121. The volute tongue 122 is arranged opposite to the air duct plate 123. The protruding rib 130 extends from an end of the protruding rib 130 connected to the air duct plate 123 towards the volute tongue 122. The protruding rib 130 is disposed between the air outlet 121 and the air inlet through hole 111. When the airflow flows from the air inlet through hole 111 to the air outlet 121, the airflow will flow through the protruding rib 130, and the protruding rib 130 has a disrupting effect on the airflow, which allows a flow speed of the airflow flowing to the air outlet 121 to be reduced to reduce noise. Moreover, a risk of airflow backflow can be reduced, and problems such as noise or abnormal sound generated by impact of the airflow backflow on the volute tongue 122 can be reduced. In other embodiments of the present disclosure, it can be understood that the enclosing plate 120 further comprises a connection plate 124 connected between the volute tongue 122 and the air duct plate 123.
In the related art, when a fan with large power is used, the fan drives the airflow to flow towards the air outlet at a high flow speed, and a small part of the airflow will impact the volute tongue, resulting in the occurrence of a counterflow problem. In this way, the volute assembly is caused to generate the problems such as noise or abnormal sound. Meanwhile, the airflow flows inside a volute to generate turbulence and generates the noise. Superimposition of these noises results in relatively strong noise generated by the volute assembly.
In the present disclosure, the protruding rib 130 is disposed in the mounting cavity 101, and the protruding rib 130 is connected to the air duct plate 123, to obstruct circulation of the airflow and reduce a speed at which the airflow flows towards the air outlet 121. Moreover, it is possible to reduce the risk of the airflow backflow and reduce the problems such as noise or abnormal sound generated by the impact of the airflow backflow on the volute tongue 122, to reduce the noise of the volute assembly 100.
According to the volute assembly 100 of the present disclosure, the protruding rib 130 is disposed in the mounting cavity 101. Moreover, the protruding rib 130 is connected to the air duct plate 123. When the airflow flows from the air inlet through hole 111 to the air outlet 121, the airflow will flow through the protruding rib 130. The protruding rib 130 can obstruct the circulation of the airflow, reduce the speed at which the airflow flows towards the air outlet 121, and change a flow direction of part of the airflow. In this way, the risk of the airflow backflow is reduced, and the problems such as noise or abnormal sound generated by the impact of the airflow backflow on the volute tongue 122 are reduced, to reduce the noise of the volute assembly 100 and improve a user's using experience.
In some embodiments of the present disclosure, the other end of the protruding rib 130 extends obliquely towards the air outlet 121.
As shown in FIG. 4 and FIG. 7, the end of the protruding rib 130 is connected to the air duct plate 123, and the protruding rib 130 extends from the end of the protruding rib 130 connected to the air duct plate 123 towards the air outlet 121 in the mounting cavity 101, to increase a length of the protruding rib 130 in a limited space. In this way, the airflow flowing to the air outlet 121 flows through the protruding rib 130 as much as possible, to improve an effect of the protruding rib 130 in reducing the flow speed of the airflow, to better disrupt the airflow flowing through the air outlet 121 and change the flow direction of the airflow. Therefore, the risk of the airflow backflow is reduced, and the problems such as noise or abnormal sound generated by the impact of the airflow backflow on the volute tongue 122 are reduced.
The other end of the protruding rib 130 may be extended to be connected to the volute tongue 122, to further increase the length of the protruding rib 130. In this way, the airflow flowing to the air outlet 121 flows through the protruding rib 130 as much as possible, to improve the effect of the protruding rib 130 in reducing the flow speed of the airflow, to better disrupt the airflow flowing through the air outlet 121 and change the flow direction of the airflow. Therefore, the risk of the airflow backflow is reduced, and the problems such as noise or abnormal noise generated by the impact of the backflow airflow on the volute tongue 122 are reduced. Meanwhile, at least part of the backflow airflow needs to flow through the protruding rib 130 again before impacting the volute tongue 122, to balance an airflow flowing in the opposite direction. Moreover, it is possible to reduce a flow speed of the backflow airflow, reducing an impact strength of the airflow on the volute tongue 122, to achieve the purpose of noise reduction. Such an arrangement also allows the protruding rib 130 to be supported between the air duct plate 123 and the volute tongue 122, improving a structural strength of the volute assembly 100.
The protruding rib 130 may be connected to an end of the volute tongue 122 close to the air outlet 121. In this way, a balancing effect of balancing the airflow flowing in the opposite direction can be improved, the flow speed of the backflow airflow can be further reduced, reducing the impact strength of the airflow on the volute tongue 122 to achieve the purpose of noise reduction.
The protruding rib 130 may be connected to a position of the air duct plate 123 away from the air outlet 121. Moreover, the protruding rib 130 may extend obliquely from the end of the protruding rib 130 connected to the air duct plate 123 towards the air outlet 121 in the mounting cavity 101 and extend to be connected to the volute tongue 122, to increase the length of the protruding rib 130 in the limited space. In this way, the airflow flowing to the air outlet 121 flows through the protruding rib 130 as much as possible, to improve the effect of the protruding rib 130 in reducing the flow speed of the airflow, to better disrupt the airflow flowing through the air outlet 121 and change the flow direction of the airflow. Therefore, the risk of the airflow backflow is reduced, and the problems such as noise or abnormal noise generated by the impact of the backflow airflow on the volute tongue 122 are reduced. The larger an inclination angle of the protruding rib 130 with respect to the air outlet 121, the longer the length of the protruding rib 130, the more airflow flowing through the protruding rib 130, and the better effect of the protruding rib 130 in reducing the flow speed of the airflow.
In some embodiments of the present disclosure, each of the two side plates 110 is provided with at least one protruding rib 130.
With reference to FIG. 4 to FIG. 9, each side plate 110 is provided with a protruding rib 130 to cause the airflow flowing to the air outlet 121 to flow through the protruding rib 130 as much as possible, to improve the effect of the protruding rib 130 in reducing the flow speed of the airflow to better disrupt the airflow flowing through the air outlet 121.
Each side plate 110 may be provided with a plurality of protruding ribs 130. The plurality of protruding ribs 130 may be arranged at intervals at a position of the side plate 110 close to the air outlet 121. Moreover, protruding heights of the plurality of protruding ribs 130 may be different to improve effects of the plurality of protruding ribs 130 in reducing the flow speed of the airflow, reducing the risk of the airflow backflow.
The protruding ribs 130 on the two side plates 110 may be arranged opposite to each other or arranged in a staggered manner, to further allow the airflow flowing to the air outlet 121 to flow through the protruding ribs 130 as much as possible, improving the effect of the protruding ribs 130 in reducing a gas flow speed, and reducing the risk of the airflow backflow.
In some embodiments of the present disclosure, a protruding height of the protruding rib 130 ranges from 1 mm to 5 mm.
A dimension by which the protruding rib 130 protrudes from the side plate 110 is defined as a height of the protruding rib 130. The height of the protruding rib 130 ranges from 1 mm to 5 mm. The height of the protruding rib 130 may be 1 mm, 2 mm, 3 mm, 4 mm, or 5 mm, and so on. The height of the protruding rib 130 is greater than or equal to 1 mm, which can ensure the effect of the protruding rib 130 in disrupting the airflow at the air outlet 121. The height of the protruding rib 130 is smaller than or equal to 5 mm, which can ensure that there is enough space above the protruding rib 130 for the airflow flowing to the air outlet 121 to pass through, reducing the effect of the protruding rib 130 on the airflow flowing to the air outlet 121.
In some embodiments of the present disclosure, a distance between two ends of the protruding rib 130 is defined as a length of the protruding rib 130, and a width of the protruding rib 130 ranges from 1 mm to 5 mm.
A dimension of the protruding rib 130 from an end of the protruding rib 130 connected to the volute tongue 122 to an end of the protruding rib 130 extending away from the air outlet 121 is defined as the length of the protruding rib 130. A dimension of the protruding rib 130 from a surface of the protruding rib 130 close to the air inlet through hole 111 to a surface of the protruding rib 130 facing away from the air inlet through hole 111 is defined as the width of the protruding rib 130. The width of the protruding rib 130 ranges from 1 mm to 5 mm. The width of the protruding rib 130 may be 1 mm, 2 mm, 3 mm, 4 mm, or 5 mm, and so on. The width of the protruding rib 130 is greater than or equal to 1 mm, which can ensure a structural strength of the protruding rib 130, avoiding fracture of the protruding rib 130. The width of the protruding rib 130 is smaller than or equal to 5 mm, which can save a material used for the protruding rib 130, saving a production cost of the volute assembly 100, and facilitating processing of the protruding rib 130.
With reference to FIG. 4, FIG. 5, FIG. 7, and FIG. 8, the protruding rib 130 may be constructed as a rectangular plate-like structure, making a processing process of the protruding rib 130 simple. In other embodiments of the present disclosure, it can be understood that a shape of the protruding rib 130 is not limited to this. For example, the protruding rib 130 may also be formed as an arc-shaped plate having a bending portion.
In a length direction of the protruding rib 130, the protruding height of the protruding rib 130 may remain unchanged, or the protruding rib 130 may also have different protruding heights. In the length direction of the protruding rib 130, the width of the protruding rib 130 may remain unchanged, or the protruding rib 130 may also have different widths.
In some embodiments of the present disclosure, the enclosing plate 120 comprises a first part 1201 and a second part 1202 that are connected to the two side plates 110, respectively. The first part 1201 and the second part 1202 are fixedly connected to each other.
With reference to FIG. 1 and FIG. 2, the first part 1201 and the second part 1202 are disposed at outer peripheral sides of the two side plates 110, respectively. Moreover, each of the first part 1201 and the second part 1202 extends from its respective connected side plate 110 in a direction away from the side plate 110. Extending directions of the first part 1201 and the second part 1202 are the same as a protruding direction of the protruding rib 130. The first part 1201 and the second part 1202 are arranged in a thickness direction of the volute assembly 100, while the first part 1201 and the second part 1202 may be arranged opposite to each other and fixedly connected to each other. In this way, the two side plates 110 may be buckled and engaged with each other, facilitating the assembly of the volute assembly 100.
In addition, the enclosing plate 120 is constructed into two parts, which can facilitate processing and assembly of the enclosing plate 120, facilitating processing and assembly of the volute assembly 100.
In some embodiments of the present disclosure, the first part 1201 is provided with an insertion portion 12011. The second part 1202 has an insertion groove 12021. The insertion portion 12011 and the insertion groove 12021 are engaged with each other through insertion.
Referring to FIG. 2, the first part 1201 is provided with a further extended insertion portion 12011 at a side of the first part 1201 facing away from the side connected to the side plate 110. The second part 1202 has an insertion groove 12021 at a side of the second part 1202 facing away from the side connected to the side plate 110, and the insertion groove 12021 is recessed towards the side plate 110 connected to the second part 1202. The insertion portion 12011 may be engaged with the insertion groove 12021 through insertion. In this way, the first part 1201 and the second part 1202 can be connected through insertion.
The insertion portion 12011 may be in an interference fit with the insertion groove 12021 to improve connection reliability between the first part 1201 and the second part 1202, improving connection reliability between the two side plates 110.
The insertion portion 12011 may be set as a small-sized protrusion structure. Moreover, a plurality of insertion portions 12011 may be provided. The plurality of insertion portions 12011 are arranged at intervals on the first part 1201. Accordingly, the insertion groove 12021 may be constructed as a plurality of groove structures adapted to the insertion portions 12011, and the first part 1201 and the second part 1202 may be connected through insertion.
The insertion portion 12011 may also be constructed as a rib structure with a same extending direction as the first part 1201. Accordingly, the insertion groove 12021 may be constructed as a groove structure adapted to the insertion portion 12011. In this way, the first part 1201 and the second part 1202 can be connected through insertion, and are easy to process.
In some embodiments of the present disclosure, at least one of the enclosing plate 120 and the two side plates 110 comprises a double-layer plate. The double-layer plate has a cavity 112 in the double-layer plate. The cavity 112 has a plurality of sound-attenuating holes 140 in communication with the mounting cavity 101.
With reference to FIG. 1 and FIG. 3, the sound-attenuating holes 140 penetrate one plate of the double-layer plate, and a part of the airflow may enter the cavity 112 through the sound-attenuating holes 140, which utilizes the principle of sound-attenuating through a small hole, to achieve a sound-attenuating effect.
Referring to FIG. 1, an extending direction of the cavity 112 is the same as an extending direction of the double-layer plate. The cavity 112 may achieve a heat insulation effect, preventing condensation from being generated on the volute assembly 100 due to a temperature difference. Meanwhile, the cavity 112 may achieve a sound insulation effect, further reducing the noise of the volute assembly 100, and improving the user's using experience.
In some embodiments of the present disclosure, a sound-attenuating member is disposed in the cavity 112. Further, the sound-attenuating member is sponge, foamed rubber, foam, knitted fabric, or non-woven fabric. These materials have a predetermined degree of elasticity. When noise is incident, vibration is excited to propagate within an interlayer and is absorbed by the elasticity of the materials themselves, achieving a better sound-attenuating effect. Moreover, the entire cavity 112 may be filled with the sound-attenuating member with elasticity, which can partially seal the sound-attenuating hole 140 on the side plate 110, preventing a negative pressure of the volute assembly 100 from reducing due to the sound-attenuating hole 140 and resulting in a decrease in an air volume.
The sound-attenuating member may be pasted inside the cavity 112. In this way, the sound-attenuating member is located in the cavity 112, which better dissipates sound waves entering the cavity 112 from the sound-attenuating hole 140, and has a relatively simple connection method.
In some embodiments of the present disclosure, the side plate 110 comprises the double-layer plate, and the plurality of sound-attenuating holes 140 are formed at each of two sides of the protruding rib 130 in a width direction of the protruding rib 130.
With reference to FIG. 4 and FIG. 7, the plurality of sound-attenuating holes 140 may be distributed away from the air outlet 121 from the air outlet 121. A circulation rate of the airflow is relatively high at the air outlet 121, and the airflow is more concentrated, resulting in relatively high noise at the air outlet 121. Meanwhile, the volute tongue 122 is disposed at the air outlet 121, and a wind direction will be diverted at the volute tongue 122, resulting in relatively large noise generated at the volute tongue 122, further increasing the noise at the air outlet 121. Such an arrangement of the sound-attenuating hole 140 can ensure the sound-attenuating effect of the sound-attenuating hole 140 and reduce the noise of the volute assembly 100.
The sound-attenuating hole 140 may be constructed to have various diameters. In this way, the sound-attenuating hole 140 can attenuate noise across multiple frequency bands. Moreover, the plurality of sound-attenuating holes 140 may be evenly formed at the side plate 110, to achieve a uniform sound-attenuating effect in a region of the volute assembly 100 having the sound-attenuating hole 140.
It should be noted that the double-layer plate structure may be formed in any way. For example, the cavity 112 may be formed within a one-piece member to define the double-layer plate structure, or a double-layer plate structure having the cavity 112 may be defined by two plates engaged with and fixed to each other.
The fan assembly 200 according to the present disclosure comprises the volute assembly 100 as described above and a fan 210. The fan 210 is disposed within the mounting cavity 101, and the protruding rib 130 is spaced apart from the fan 210.
With reference to FIG. 1 and FIG. 4 to FIG. 9, a size of the mounting cavity 101 is greater than a size of the fan 210, and the fan 210 is spaced apart from the protruding rib 130, to prevent the protruding rib 130 from affecting operation of the fan 210, enabling the fan 210 to operate normally. The fan assembly 200 further comprises a drive motor. The drive motor is mounted on the side plate 110 through a connection member. The fan 210 is mounted on an output shaft of the drive motor. The drive motor may drive the fan 210 to operate. In this way, the fan 210 can drive the airflow to flow from the air inlet through hole 111 into the mounting cavity 101 and out of the air outlet 121, to achieve air circulation.
Since the fan assembly 200 is provided with the above-described volute assembly 100, by providing the protruding rib 130 in the mounting cavity 101 of the volute assembly 100 and disposing the protruding rib 130 between the air outlet 121 and the air inlet through hole 111, when the airflow flows from the air inlet through hole 111 to the air outlet 121, the airflow will flow through the protruding rib 130. The protruding rib 130 can obstruct the circulation of the airflow, reduce the speed at which the airflow flows towards the air outlet 121, and change the flow direction of part of the airflow. In this way, the risk of the airflow backflow is reduced, and the problems such as noise or abnormal sound generated by the impact of the airflow backflow on the volute tongue 122 are reduced, to reduce the noise of the volute assembly 100. The protruding rib 130 is connected to the volute tongue 122. In this way, at least part of the backflow airflow needs to flow through the protruding rib 130 again before impacting the volute tongue 122, to balance the airflow flowing in the opposite direction. Moreover, it is possible to reduce the flow speed of the backflow airflow, reducing the impact strength of the airflow on the volute tongue 122, to achieve the purpose of noise reduction. The volute assembly 100 further has a cavity 112 and a sound-attenuating hole 140, to further reduce the noise of the volute assembly 100, reducing noise of the fan assembly 200. Moreover, the cavity 112 can achieve the heat insulation effect, preventing the condensation from being generated due to the temperature difference, and improving the user's using experience.
As shown in FIG. 10, noise generated by a sample machine No.1 of the present disclosure is relatively low when rotational speeds of the fan 210 are the same. It should be noted that the sample machine No.1 refers to the volute assembly 100 provided with the protruding rib 130. A prototype machine is a volute assembly without the protruding rib 130.
In some embodiments of the present disclosure, a minimum distance between the protruding rib 130 and the fan 210 ranges from 1 mm to 10 mm.
With reference to FIG. 4 and FIG. 7, the minimum distance between the protruding rib 130 and the fan 210 is greater than or equal to 1 mm, which can prevent the protruding rib 130 from obstructing the operation of the fan 210. In this way, the fan 210 can drive the airflow to flow normally. The minimum distance between the protruding rib 130 and the fan 210 is smaller than or equal to 10 mm, which can allow the airflow flowing to the air outlet 121 to flow through the protruding rib 130 as soon as possible. In this way, the protruding rib 130 can decelerate the airflow flowing to the air outlet 121 at an earlier stage, ensuring a deceleration effect of the protruding rib 130 on the airflow flowing to the air outlet 121.
Referring to FIG. 1, an air treatment device 1000 according to the present disclosure comprises the fan assembly 200 as described above. The fan assembly 200 is disposed within the air treatment device 1000.
By providing the protruding rib 130 in the mounting cavity 101 of the volute assembly 100 and disposing the protruding rib 130 between the air outlet 121 and the air inlet through hole 111, when the airflow flows from the air inlet through hole 111 to the air outlet 121, the airflow will flow through the protruding rib 130. The protruding rib 130 can obstruct the circulation of the airflow, reduce the speed at which the airflow flows towards the air outlet 121, and change the flow direction of part of the airflow. In this way, the risk of the airflow backflow is reduced, and the problems such as noise or abnormal sound generated by the impact of the airflow backflow on the volute tongue 122 are reduced, to reduce the noise of the volute assembly 100. The protruding rib 130 is connected to the volute tongue 122. In this way, at least part of the backflow airflow needs to flow through the protruding rib 130 again before impacting the volute tongue 122, to balance the airflow flowing in the opposite direction. Moreover, it is possible to reduce the flow speed of the backflow airflow, reducing the impact strength of the airflow on the volute tongue 122, to achieve the purpose of noise reduction. The volute assembly 100 further has a cavity 112 and a sound-attenuating hole 140, to further reduce the noise of the volute assembly 100, reducing noise of the air treatment device 1000. Moreover, the cavity 112 can achieve the heat insulation effect, preventing the condensation from being generated due to the temperature difference, and improving the user's using experience.
In the description of this specification, descriptions with reference to the terms "an embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc., mean that specific features, structure, materials or characteristics described in conjunction with the embodiment or example are comprised in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine the different embodiments or examples and the features of the different embodiments or examples described in this specification without contradicting each other.
Although embodiments according to the present disclosure have been shown and described, it would be appreciated by those skilled in the art that the above embodiments are illustrative and cannot be construed to limitation on the present disclosure, and changes, alternatives, modifications, and variations can be made to the embodiments without departing from scope of the present disclosure.

Claims

A volute assembly, comprising:
two side plates arranged opposite to each other, at least one of the two side plates having an air inlet through hole;

an enclosing plate connected to each of the two side plates, the two side plates cooperating with the enclosing plate to define a mounting cavity for installation of a fan, the enclosing plate having an air outlet, each of the air outlet and the air inlet through hole being in communication with the mounting cavity, and the enclosing plate comprising a volute tongue disposed adjacent to the air outlet and an air duct plate arranged opposite to the volute tongue; and

a protruding rib disposed at the side plate and located in the mounting cavity, wherein the protruding rib has an end connected to the air duct plate and an other end extending towards the volute tongue.
The volute assembly according to claim 1, wherein the other end of the protruding rib extends obliquely towards the air outlet.
The volute assembly according to claim 1 or 2, wherein the other end of the protruding rib is connected to the volute tongue.
The volute assembly according to any one of claims 1 to 3, wherein each of the two side plates is provided with at least one protruding rib.
The volute assembly according to any one of claims 1 to 4, wherein a protruding height of the protruding rib ranges from 1 mm to 5 mm.
The volute assembly according to any one of claims 1 to 5, wherein:
a distance between two ends of the protruding rib is defined as a length of the protruding rib; and

a width of the protruding rib ranges from 1 mm to 5 mm.
The volute assembly according to any one of claims 1 to 6, wherein the enclosing plate comprises a first part and a second part that are connected to the two side plates, respectively, the first part and the second part being fixedly connected to each other.
The volute assembly according to claim 7, wherein:
the first part has an insertion portion; and

the second part has an insertion groove, the insertion portion and the insertion groove being engaged with each other through insertion.
The volute assembly according to any one of claims 1 to 8, wherein at least one of the enclosing plate (120) and the two side plates (110)comprises a double-layer plate, wherein the double-layer plate has a cavity formed in the double-layer plate, the cavity having a plurality of sound-attenuating holes in communication with the mounting cavity.
The volute assembly according to claim 9, wherein:
the side plate comprises the double-layer plate; and

the plurality of sound-attenuating holes are formed at each of two sides of the protruding rib in a width direction of the protruding rib.
The volute assembly according to claim 9, wherein a sound-attenuating member is disposed in the cavity.
A fan assembly, comprising:
a volute assembly according to any one of claims 1 to 11; and

a fan disposed in the mounting cavity, a protruding rib being spaced apart from the fan.
The fan assembly according to claim 12, wherein a minimum distance between the protruding rib and the fan ranges from 1 mm to 10 mm.
An air treatment device, comprising a fan assembly according to claim 12 or 13.