CN116241506A

CN116241506A - Volute structure, air duct assembly and air conditioner

Info

Publication number: CN116241506A
Application number: CN202111494167.4A
Authority: CN
Inventors: 代思全; 张勇; 张幼财; 杨林; 迟莽
Original assignee: TCL Air Conditioner Zhongshan Co Ltd
Current assignee: TCL Air Conditioner Zhongshan Co Ltd
Priority date: 2021-12-08
Filing date: 2021-12-08
Publication date: 2023-06-09
Also published as: WO2023103123A1

Abstract

The application provides a spiral case structure, wind channel subassembly and air conditioner, include: the volute body is provided with a volute tongue and an air outlet; and one end of the flow blocking piece is arranged on the volute tongue, the other end of the flow blocking piece extends towards the direction deviating from the air outlet, and the flow blocking piece is used for reducing the impact of air flow at the air outlet on the volute tongue. Through setting up the choke piece in volute tongue department, the choke piece can block and separate the backward flow wind that forms in the air outlet and be close to volute tongue department to will block backward flow wind after separating and guide the both sides of choke piece respectively, reduced the impact of backward flow wind to the volute tongue, and then reduced pneumatic noise.

Description

Volute structure, air duct assembly and air conditioner

Technical Field

The application relates to the technical field of air conditioning, in particular to a volute structure, an air duct assembly and an air conditioner.

Background

Fresh air outside the fresh air inlet room of new trend to the air circulation clarification plant outside the indoor dirty air discharge room. In order to realize the driving of air flow, the existing fresh air fan commonly uses a forward centrifugal fan as a power device.

In operation, the centrifugal fan flows out of the air outlet along the air outlet direction; however, the air is easy to form backflow air at the position of the air outlet close to the volute tongue, the backflow air can impact the volute tongue, larger pneumatic noise is easy to generate, and the user experience is poor.

Disclosure of Invention

The application provides a spiral case structure, wind channel subassembly and air conditioner to solve the technical problem that the backward flow wind in volute tongue department causes pneumatic noise among the prior art.

In one aspect, the present application provides a volute structure comprising:

the volute body is provided with a volute tongue and an air outlet;

the fixed end of the flow blocking piece is connected to the volute tongue, and the free end of the flow blocking piece extends towards the direction away from the air outlet so as to block air flow impacting the volute tongue.

In one possible implementation manner of the present application, the volute structure has a mounting cavity for mounting a centrifugal fan blade, and the extending direction of the free end is tangential to the upper edge of the centrifugal fan blade, which is close to the air outlet.

In one possible implementation of the present application, a tangent to the free end and the upper edge is parallel to the air outlet direction.

In one possible implementation of the present application, the flow blocking member is provided with micro-holes.

In one possible implementation of the present application, the fixed end is rotatably connected to the volute tongue.

In one possible implementation manner of the present application, a baffle is disposed in the volute body, the baffle is mounted on one side, away from the air outlet, of the volute body, and an extension direction of the baffle is parallel to the air outlet direction.

In one possible implementation manner of the present application, the deflector includes a first portion and a second portion, the first portion is located at an end of the second portion away from the air outlet, and extension directions of the first portion and the second portion are different.

In one possible implementation manner of the present application, the volute structure includes a guide ring, the guide ring is installed in the volute body, the guide ring includes an arc segment and a straight line segment, the arc segment is connected with the straight line segment, and the straight line segment is disposed opposite to the volute tongue.

In another aspect, the present application also provides an air duct assembly comprising a volute structure as described above and the centrifugal fan blade mounted within the volute body.

In another aspect, the present application also provides an air conditioner including the air duct assembly as described above.

Drawings

Technical solutions and other advantageous effects of the present application will be made apparent from the following detailed description of specific embodiments of the present application with reference to the accompanying drawings.

Fig. 1 is a schematic structural diagram of a volute structure provided in an embodiment of the present application;

FIG. 2 is a cross-sectional view of a prior art volute construction at K in FIG. 1;

FIG. 3 is a cross-sectional view of a volute structure provided in an embodiment of the present application at K in FIG. 1;

fig. 4 is a schematic structural diagram of a guide ring according to an embodiment of the present disclosure;

fig. 5 is a schematic structural diagram of an air duct assembly according to an embodiment of the present disclosure.

Reference numerals:

the volute structure 100, the body 110, the annular flow passage 111, the outlet 120, the air outlet 121, the upper side plate 122, the lower side plate 123, the volute tongue 130, the volute body 150, the flow blocking piece 160, the fixed end 161, the free end 162, the flow guide plate 170, the first portion 171, the second portion 172, the flow guide ring 180, the circular arc segment 181, the straight line segment 182, the air duct assembly 200, the filter housing 210, the air outlet direction F1, the low pressure area A1 and the high pressure area A2.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It will be apparent that the described embodiments are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by those skilled in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.

In the description of the present application, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," etc. indicate or are based on the orientation or positional relationship shown in the drawings, merely for convenience of description and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more of the described features. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically connected, electrically connected or can be communicated with each other; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.

In this application, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, and may also include the first and second features not being in direct contact but being in contact with each other by way of additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

The following disclosure provides many different embodiments or examples for implementing different structures of the present application. In order to simplify the disclosure of the present application, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present application. Furthermore, the present application may repeat reference numerals and/or letters in the various examples, which are for the purpose of brevity and clarity, and which do not in themselves indicate the relationship between the various embodiments and/or arrangements discussed. In addition, the present application provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize the application of other processes and/or the use of other materials.

Referring to fig. 1 to 3, an embodiment of the present application provides a volute structure 100, including: the volute body 150 is provided with a volute tongue 130 and an air outlet 121; the choke 160 has a fixed end 161 connected to the volute tongue 130 and a free end 162 extending away from the air outlet 121 to block airflow impinging on the volute tongue 130.

It should be noted that the volute structure 100 is shaped like a snail shell. In the embodiment of the present application, the volute structure 100 is enclosed by two volute bodies 150 in the shape of snail shells; the scroll casing structure 100 may be configured by surrounding a plurality of side plates, and the like, and is not limited thereto.

The volute body 150 has a body portion 110 and an outlet portion 120 that are connected to each other. The cross-sectional shape of the body 110 is approximately circular, and centrifugal fan blades (not shown) may be disposed inside the body, and the air flow flows through the annular flow channel 111 between the body 110 and the centrifugal fan blades and is discharged from the outlet 120. The outlet 120 may be surrounded by four side plates including an upper side plate 122 and a lower side plate 123. The tangential direction of the centrifugal fan blade at the nearest edge of the upper side plate 122 is generally the air outlet direction F1, which is generally the uppermost end of the centrifugal fan blade installed in the volute body 150. The air outlet 121 is located at an end of the outlet portion 120 away from the body portion 110, and has a rectangular shape. The connection between the body 110 and the outlet 120 is formed with a volute tongue 130, that is, the connection between the lower side plate 123 and the body 110 is formed with the volute tongue 130, so as to avoid shock waves or noise generated by the airflow flowing through a sharp object, the volute tongue 130 is in a circular arc shape with a smooth surface.

When the centrifugal fan blade rotates, air flow firstly enters the centrifugal fan blade from the external space and is accelerated to flow out along the tangential direction at the edge of the centrifugal fan blade under the influence of the centrifugal force; and then enters and flows along the annular flow passage 111, and a portion of the airflow eventually exits along the outlet 120. The other part of the air flow does not enter the outlet portion 120 due to the fact that the air flow just enters the centrifugal fan blade or is influenced by the volute tongue 130 and the body portion 110, and therefore enters the annular flow channel 111. Therefore, two high-speed air flows pass through two sides of the volute tongue 130, and the high-speed air flows drive the air flow near the volute tongue 130 to flow away, so that a low-pressure area A1, namely a backflow area, is formed in the area near the volute tongue 130. Part of the air entering the air outlet part or the annular flow passage 111 flows back to the backflow area under the suction action of the low-pressure area A1, and forms backflow air in the backflow area, wherein most of the backflow air is vortex airflow, and the backflow air continuously impacts the volute tongue 130, and forms pneumatic noise.

By providing the flow blocking piece 160 at the volute tongue 130, the flow blocking piece 160 can block and separate the backflow wind formed at the air outlet 121 near the volute tongue 130, and guide the backflow wind after blocking and separating to two sides of the flow blocking piece 160 respectively, so that the impact of the backflow wind on the volute tongue 130 is reduced, and the aerodynamic noise is further reduced.

Specifically, the flow blocking member 160 is a plate-like member; wherein, both sides of the plate-shaped choke 160 are respectively abutted against the volute body 150, that is, there is no gap between both sides of the choke 160 and the volute body 150.

The plate-shaped flow blocking member 160 has a simple structure; and the fixing end 161 is connected to the volute tongue 130 in cooperation with the above, so that the gap between the flow blocking piece 160 and the volute body 150 is reduced, the pneumatic noise generated after the high-speed airflow impacts the gap can be avoided, and the user experience is improved.

Specifically, the free end 162 is curved.

The free end 162 has a smooth surface and allows for smoother airflow past the flow stop 160, reducing aerodynamic noise, the principles of which are the same or similar to those described above and will not be described in further detail herein.

In some embodiments, the volute structure 100 has a mounting cavity for mounting the centrifugal fan blade, and the free end 162 extends tangentially to the upper edge of the centrifugal fan blade near the air outlet 121.

From the above, after the air enters the centrifugal fan blade, the air is influenced by the centrifugal force and can flow out in an accelerating way along the tangential direction of the edge of the centrifugal fan blade. The centrifugal fan blades are round, so that the centrifugal fan blades can accelerate to throw out air flow in the annular flow channel 111 at 360 degrees; accordingly, a part of airflow is directed to the volute tongue 130 in a tangential direction, that is, a part of airflow directly flows towards the volute tongue 130, so that the air quantity of the return air is increased, and the aerodynamic noise is increased.

By making the free end 162 of the flow blocking member 160 extend tangentially to the upper edge of the centrifugal fan blade near the air outlet 121, i.e. the free end 162 is directed towards the portion of the airflow of the volute tongue 130 directly against the tangential direction. The air flow can be better blocked and separated, so that the air flow entering the backflow area is reduced, the air quantity and the air speed of backflow air are weakened, and the pneumatic noise is further reduced.

It will be appreciated that the free end 162 may better block and separate a portion of the airflow directed tangentially to the volute tongue 130. In the prior art, the shape of the partial centrifugal fan blade is arc, so that the tangential direction of the air flow may be slightly deflected.

Accordingly, the direction of extension of the free end 162 is at an angle to the line between the direction of extension of the free end 162 and the upper edge, i.e., the direction of extension of the free end 162 may slightly float up and down the upper edge, e.g., -10 ° to 10 °, to better align the flow stop 160 with the airflow directed toward the volute tongue 130, without undue restriction.

Preferably, the extension direction of the fixed end 161 is parallel to the extension direction of the lower side plate 123.

By providing the fixed end 161 with the extending direction parallel to the extending direction of the lower side plate 123, that is, the fixed end 161 and the lower side plate 123 are in the same plane and smoothly transition; the blocking of the flow of air from the flow resistor 160 to the lower plate 123 can be reduced, reducing aerodynamic noise.

Further, in other embodiments, the extending direction of the fixed end 161 and the extending direction of the lower side plate 123 may have an included angle, which may range from 15 ° to 45 °, and is not limited herein.

Optionally, the choke 160 further includes a guiding section, which is located between the fixed end 161 and the free end 162, and extends in a direction parallel to the upper side plate 122.

By arranging the guide section to connect the fixed end 161 and the free end 162, the air flow flowing through the flow blocking piece 160 can flow smoothly, and local air flow disorder caused by overlarge included angle between the extending directions of the fixed end 161 and the free end 162 is avoided; thereby improving the aerodynamic efficiency of the volute structure 100 and reducing aerodynamic noise.

Further, in other embodiments, the connection between the fixed end 161, the guiding section and the free end 162 may be rounded, which may further improve the smoothness of the airflow through the flow blocking member 160, which is not limited herein.

Further, in other embodiments, the extending direction of the guiding section may be other directions, for example, parallel to the air outlet direction F1, or an angle of 10 ° with the extending direction of the upper side plate 122, or an angle of 15 ° with the extending direction of the upper side plate 122, etc., which is not limited herein.

In some embodiments, a tangent to the free end 162 and the upper edge is parallel to the air outlet direction F1.

As can be seen from the above, the air outlet direction F1 may be parallel to the tangential direction of the highest point of the centrifugal fan blade, and the tangential line of the free end 162 and the upper edge is parallel to the air outlet direction F1, i.e. the free end 162 and the upper edge are located at the same height.

By setting the free end 162 and the upper edge to be at the same height, the air flow entering the outlet 120 and the air flow entering the annular flow passage 111 can be better separated, thereby reducing the air quantity entering the low-pressure area A1 and reducing the aerodynamic noise.

In some embodiments, the flow blocking member 160 is provided with micro-holes (not shown).

It should be noted that, although the flow blocking member 160 blocks and separates part of the return air, the impact of the return air on the volute tongue 130 is reduced. There is still a portion of the backflow wind that is not completely removed that continues to impinge on the spoilers 160 and create aerodynamic noise.

When the airflow passes through the micropores, fine air columns are formed in the micropores and the vicinity of the micropores, and the air columns can further extend in the vicinity of the micropores to form a small-scale protection layer. When the air flows such as the backflow air impact the air column or the protective layer, the air flows and the air column or the protective layer are offset, so that the kinetic energy of the backflow air is reduced, the wind speed of the backflow air is reduced, and the pneumatic noise is further reduced.

By providing micro-holes in the spoilers 160, aerodynamic noise created when the backflow wind impinges the spoilers 160 can be reduced, improving user experience.

Preferably, the microwells are circular.

The round micropores have smooth surfaces, so that aerodynamic noise can be further reduced.

Further, in other embodiments, the micropores may be rectangular, elliptical, etc., without being excessively limited thereto.

In some embodiments, the flow resistor 160 comprises a plurality of micro-holes, and the aperture ratio of the flow resistor 160 is B, wherein B satisfies: b is more than or equal to 10% and less than or equal to 50%.

By providing a plurality of micro-holes, the range of the air column or the protective layer covering the flow blocking piece 160 can be increased as much as possible, and the aerodynamic noise generated when the backflow air impacts the flow blocking piece 160 can be further reduced.

Specifically, a plurality of microwell arrays are arranged.

The regularly arranged plurality of micropores can enable the air column or the protective layer to be uniformly and regularly arranged on the surface of the flow blocking piece 160, so that the noise reduction effect of the flow blocking piece 160 is improved.

Further, in other embodiments, the plurality of micro-holes may also be randomly arranged, without being excessively limited herein.

Further, in other embodiments, B may also satisfy: b is more than or equal to 5% and less than 10%, or B is more than or equal to 50% and less than or equal to 60%, etc., and the excessive limitation is not made here.

In some embodiments, the fixed end 161 is rotatably coupled to the volute tongue 130.

It should be noted that, the rotational speeds of the centrifugal fan blades are different, and the fluid speeds in the volute body 150 are different; at different flow rates, the region where the return air is formed near the volute tongue 130 may vary slightly, depending on the configuration of the volute structure 100 itself, etc. For example, the return air is formed in a region of the volute tongue 130 near the outlet 120, or in a region of the volute tongue 130 near the annular flow channel 111.

By rotationally connecting the fixed end 161 with the volute tongue 130, that is, by rotating the fixed end 161 to drive the change of the extending direction of the free end 162, the free end 162 can correspond to the central area of the return air under different flow rates; and further, the backflow air can be well blocked and separated, and the pneumatic noise is reduced.

Specifically, the user may manually adjust the rotation of the spoilers 160.

During manual adjustment, a user can adjust the rotating spoiler 160 in real time according to noise feedback, so that the free end 162 can correspond to the central region of the return air, and aerodynamic noise is reduced.

Further, in other embodiments, a driving mechanism, such as a stepping motor, may be provided to regulate the rotation of the fixed end 161, which is not limited thereto.

In some embodiments, a baffle 170 is disposed in the volute body 150, the baffle 170 is installed on a side of the volute body 150 away from the air outlet 121, and an extending direction of the baffle 170 is parallel to the air outlet direction F1.

It should be noted that, due to the fact that the outlet 120 is generally horn-shaped and the gas partially enters the annular flow channel 111, a high pressure area A2 is formed in the outlet 120 and above the volute tongue 130, and a part of the air flow in the high pressure area A2 flows back to the low pressure area A1 near the volute tongue 130, which aggravates the formation of the backflow air and increases the aerodynamic noise.

It should be noted that the baffle 170 is installed above the centrifugal fan blade.

By providing the baffle 170 at least partially isolating the air flow in the high pressure region A2, the flow field distribution in the area proximate the volute tongue 130 and in the outlet 120 is altered. So that part of the air flow in the high-pressure area A2 is not affected by the low-pressure area A1 and directly flows out of the outlet 120, the air flow entering the low-pressure area A1 can be reduced, the flow of the return air is further reduced, and the aerodynamic noise is reduced.

Specifically, both sides of the baffle 170 abut against the volute body 150.

As above, the gap between the baffle 170 and the housing body may be reduced, thereby reducing aerodynamic noise, the principles of which are the same or similar to those described above and will not be described in further detail herein.

Further, in other embodiments, the extending direction of the baffle 170 may also have an included angle with the air outlet direction F1, for example, 5 °, 10 °, or the like, which is not limited herein.

In some embodiments, the baffle 170 includes a first portion 171 and a second portion 172, the first portion 171 is located at an end of the second portion 172 away from the air outlet 121, and the extending directions of the first portion 171 and the second portion 172 are different.

It should be noted that, the first portion 171 may be disposed in the annular flow channel 111, and the second portion 172 may be disposed in the outlet portion 120; since the annular flow passage 111 is circular, the circular airflow direction in the annular flow passage 111 is different from the linear airflow direction in the outlet portion 120.

By providing the first portion 171 for guiding the air flow dispersed in the annular flow passage 111, and by providing the second portion 172 for guiding the air flow dispersed in the outlet portion 120; the air flow entering the low-pressure area A1 can be further reduced, so that the flow of the return air is weakened, and the pneumatic noise is reduced.

Specifically, the first portion 171 and the second portion 172 are both rectilinear plate bodies, an included angle between the extending directions of the first portion 171 and the second portion 172 ranges from 10 ° to 30 °, and the first portion 171 extends in a direction approaching the centrifugal fan blade.

Further, in other embodiments, the first portion 171 may be an arcuate plate body, which is shaped to fit the annular flow channel 111; the blocking of the air flow in the annular flow passage 111 by the first portion 171 can be reduced, and aerodynamic noise can be reduced, without being excessively restricted.

Further, in other embodiments, the included angle between the extending directions of the first portion 171 and the second portion 172 may be 5 ° to 10 °, 30 ° to 45 °, or the like, which is not limited herein.

Referring to fig. 2 to 4, in some embodiments, the volute structure 100 includes a guide ring 180, the guide ring 180 is installed in the volute body 150, the guide ring 180 includes an arc segment 181 and a straight segment 182, the arc segment 181 is connected to the straight segment 182, and the straight segment 182 is disposed opposite to the volute tongue 130.

It can be understood that the cross-sectional shape of the guide ring 180 is a combination of an arc and a straight line, and the distance between each point on the straight line and the center of the circle is smaller than the radius of the arc; and since the straight segment 182 is disposed opposite the volute tongue 130, and the annular channel 111 is generally regular circular, the distance of the volute tongue 130 from the straight segment 182 is greater than the width of the annular channel 111. Accordingly, the airflow at the annular flow passage 111 near the volute tongue 130 has more room to flow, where it can flow more closely to the straight section 182; further, the air flow entering the low-pressure area A1 is reduced, the return air is weakened, and the pneumatic noise is reduced.

The present application also provides an air duct assembly 200 comprising the volute structure 100 as described above and centrifugal fan blades mounted within the volute body 150. Since the air duct assembly 200 has the above-mentioned volute structure 100, it has all the same advantages, and the present invention is not described herein.

In addition, the type of the air duct assembly 200 may be determined according to actual needs, and may be an indoor air duct assembly, a fresh air duct assembly, or the like, which is not limited in the embodiment of the present application.

In some embodiments, the air duct assembly 200 may also include a filter housing 210. The filter housing 210 is mounted on the volute structure 100, and air enters the volute body 150 through the filter housing 210, and the filter housing 210 can filter the air to improve the air quality.

Referring to fig. 5, the present application further provides an air conditioner (not shown) including the air duct assembly 200 as described above. Since the air conditioner has the above-mentioned air duct assembly 200, the present invention has all the same advantageous effects, and will not be described herein. In addition, the type of the air conditioner may be determined according to actual needs, and a type such as a cabinet air conditioner or a hanging air conditioner may be used, which is not limited in the embodiment of the present application.

In the foregoing embodiments, the descriptions of the embodiments are emphasized, and for parts of one embodiment that are not described in detail, reference may be made to related descriptions of other embodiments.

The above describes in detail a volute structure 100, an air duct assembly 200 and an air conditioner provided in the embodiments of the present application, and specific examples are applied to illustrate the principles and implementations of the present application, where the above description of the embodiments is only used to help understand the technical solution and the core idea of the present application; those of ordinary skill in the art will appreciate that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A volute structure, comprising:

the volute body is provided with a volute tongue and an air outlet;

2. The volute structure of claim 1, wherein the volute structure has a mounting cavity for mounting a centrifugal fan blade, and wherein the free end extends tangentially to an upper edge of the centrifugal fan blade proximate the air outlet.

3. A volute structure according to claim 2, wherein a tangent to the free end and the upper edge is parallel to the direction of the air outlet.

4. The volute structure of claim 1, wherein the flow blocking member is provided with micro-holes.

5. The volute structure of claim 1, wherein the fixed end is rotatably coupled to the volute tongue.

6. The volute structure of claim 1, wherein a baffle is disposed in the volute body, the baffle is mounted on a side of the volute body away from the air outlet, and an extension direction of the baffle is parallel to the air outlet direction.

7. The volute structure of claim 6, wherein the baffle includes a first portion and a second portion, the first portion being located at an end of the second portion remote from the air outlet, the first portion and the second portion extending in different directions.

8. The volute structure of any one of claims 1-7, wherein the volute structure comprises a deflector ring mounted within the volute body, the deflector ring comprising an arc segment and a straight segment, the arc segment connecting the straight segment, the straight segment being disposed opposite the volute tongue.

9. An air duct assembly comprising the volute structure of claim 8 and the centrifugal fan blade, the centrifugal fan blade being mounted within the volute body.

10. An air conditioner comprising the duct assembly of claim 9.