CN110887146A - Air duct assembly and air conditioner fan - Google Patents

Abstract

The invention relates to an air duct assembly and an air-conditioning fan. The air duct assembly comprises: a casing, on which an air inlet and an air outlet communicate with each other; The volute tongue is arranged on the inner wall of the casing corresponding to the air outlet, and has a gap with the wind wheel; and the grid is arranged between the wind wheel and the air inlet; wherein, the grid has an air passage part and a blocking part, and the air passage part It is connected with the air inlet to filter the air flow to the wind wheel; the blocking part is arranged on the inner wall of the casing relative to the volute tongue to block the air flow from the air inlet directly to the volute tongue, reduce the air flow to the bottom of the volute tongue, and prevent excessive airflow from accumulating to the volute tongue. Noise is generated due to the inability to discharge in time near the snail tongue. In addition, after reducing the air flow to the bottom of the volute tongue, the return air flow near the volute tongue can more smoothly meet with the main intake air flow, thereby reducing the noise of the collision and impact of the two airflows, and further reducing the noise of the air duct assembly during operation.

Description

Air Duct Components and Air Conditioning Fans

technical field

The invention relates to the technical field of household appliances, in particular to an air duct assembly and an air-conditioning fan.

Background technique

Air conditioning fan, also known as cooling fan, is a new type of refrigeration equipment, which has the advantages of good refrigeration effect, energy saving and environmental protection, natural humidification, small size, etc., and has won the favor of consumers.

The working principle of the air-conditioning fan is to provide suction power through the wind wheel, suck the outside air through the wet curtain, and then send it to the outside world to achieve the effect of ventilation and cooling. At present, there are three types of wind turbines: cross-flow wind wheel, centrifugal wind wheel and axial flow wind wheel. Among them, the cross-flow wind wheel and its components are widely used in cooling fans because of their simple structure, compactness and convenience. However, when the general cross-flow air-conditioning fan is working, the space near the volute tongue is small, and it is difficult to discharge the airflow at one time, which is easy to form backflow and eddy current, and generate noise.

SUMMARY OF THE INVENTION

Based on this, it is necessary to provide an air duct assembly and an air-conditioning fan to reduce the noise of the air-conditioning fan during operation.

An air duct assembly comprising:

a casing, which is provided with an air inlet and an air outlet that communicate with each other;

a wind wheel, which is arranged in the casing and is located between the air inlet and the air outlet;

a volute tongue, which is arranged on the inner wall of the casing corresponding to the air outlet, and has a gap with the wind wheel; and

a grid, arranged between the wind wheel and the air inlet;

Wherein, the grid has an air passage part and a blocking part, the air passage part is communicated with the air inlet, and the blocking part is arranged on the inner wall of the casing opposite to the volute tongue.

In the above-mentioned air duct assembly, the blocking part of the grid is arranged on the inner wall of the casing relative to the volute to prevent the airflow from directly flowing to the volute from the air inlet, reducing the airflow to the bottom of the volute and preventing excessive airflow from gathering near the volute. The noise can not be discharged in time. In addition, after reducing the air flow to the bottom of the volute tongue, the return air flow near the volute tongue can meet the main air intake air more smoothly, thereby reducing the noise of the collision and impact of the two airflows, and further reducing the noise of the air duct assembly during operation.

In one of the embodiments, the orthographic projection of the blocking portion towards the volute completely covers the volute.

In one of the embodiments, the connecting line between the connection between the blocking part and the wind passing part and the center of the fan wheel is a first connecting line, and the end of the volute tongue facing the blocking part is connected with the wind wheel. The line connecting the center of the wheel is the second connecting line;

The included angle between the first connection line and the second connection line is 30°-45°.

In one of the embodiments, the air passage portion is provided with a plurality of air passage holes, and the air passage holes include an inlet section and an outlet section sequentially distributed in the air passage direction;

The inner wall of the inlet section is arranged to expand outwardly in an arc shape; and/or

The inner wall of the outlet section is arranged in an arc-shaped outward expansion.

In one embodiment, the air passage portion includes a plurality of transverse bars and a plurality of longitudinal bars, and the plurality of transverse bars and the plurality of longitudinal bars are interdigitated to form a grid-like structure having a plurality of the air passage holes;

At least part of the transverse ribs are arranged in arcs at both ends along the wind passing direction; and/or

At least part of the connecting ends of the longitudinal ribs along the wind passing direction are arranged in an arc shape.

In one of the embodiments, the longitudinal section of at least part of the transverse rib is waist-shaped; and/or

The longitudinal section of at least part of the longitudinal ribs is waist-shaped.

In one of the embodiments, a heating element is further included, and the heating element can extend into the air outlet.

In one embodiment, the heating element reciprocates between a first position extending into the air outlet and a second position exiting the air outlet.

In one embodiment, the heating element is rotatably disposed on the housing and rotates between the first position and the second position.

In one of the embodiments, a wet curtain is further included, and the wet curtain is arranged between the air inlet and the grid.

In one of the embodiments, it further comprises a wind deflector provided in the casing, one end of the wind deflector is connected to the inner wall of the casing, and the other end of the wind deflector extends toward the grid;

The air guide plate and the grid are arranged around the outside of the wind wheel, and enclose to form an air guide space communicated with the air outlet.

An air-conditioning fan includes the above-mentioned air duct assembly.

Description of drawings

1 is a schematic structural diagram of an air duct assembly in a heating state according to an embodiment of the present invention;

Fig. 2 is the schematic diagram of the airflow direction of the air duct assembly shown in Fig. 1;

Fig. 3 is the cross-sectional schematic diagram of the grid in the air duct assembly shown in Fig. 1;

FIG. 4 is a schematic structural diagram of the air duct assembly shown in FIG. 1 in a cooling state.

Detailed ways

In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the related drawings. Preferred embodiments of the invention are shown in the accompanying drawings. However, the present invention may be embodied in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that a thorough and complete understanding of the present disclosure is provided.

It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terms used herein in the description of the present invention are for the purpose of describing specific embodiments only, and are not intended to limit the present invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to FIG. 1 , in an embodiment of the present invention, an air duct assembly 100 is provided. The air duct assembly 100 includes a casing 10 , a wind wheel 30 , a volute 50 and a grid 70 .

The outer casing 10 is provided with an air inlet 12 and an air outlet 14 that communicate with each other. The wind wheel 30 is arranged in the outer casing 10 and is located between the air inlet 12 and the air outlet 14. The air outlet 14 flows out; the volute tongue 50 is arranged on the inner wall of the casing 10 corresponding to the air outlet 14, and there is a gap between the volute tongue 50 and the wind wheel 30, so as to guide the air flow smoothly from the air outlet 14 through the volute tongue 50; Between the wheel 30 and the air inlet 12, there is an air passage portion 72 and a blocking portion 74. The air passage portion 72 communicates with the air inlet 12, and the air flows from the air inlet 12 to the air passage portion 72 of the grille 70 after being filtered, and then flows out through the air passage. The wind section 72 filters and guides the air flow to the wind rotor 30 . In addition, the blocking portion 74 of the grid 70 is arranged on the inner wall of the casing 10 relative to the volute 50, so as to block the airflow from the air inlet 12 directly to the volute 50, reduce the airflow to the bottom of the volute 50, and prevent excessive airflow from gathering to the volute 50. Noise is generated due to the inability to discharge in time near the volute tongue 50 . In addition, after reducing the air flow to the bottom of the volute tongue 50, the return air flow near the volute tongue 50 can more smoothly meet the main airflow of the intake air, thereby reducing the noise of the collision of the two airflows, and further reducing the working time of the air duct assembly 100. noise.

Optionally, the grid 70 is arranged around the outer circumference of the wind wheel 30 and is an L-shaped plate with one end connected to the inner wall of the casing 10 and the other end suspended. In addition, the corners of the L-shaped plate are rounded to prevent the airflow from being over-concentrated at the corners, so as to guide the airflow to the wind wheel 30 evenly.

In some embodiments, the orthographic projection of the blocking portion 74 toward the volute 50 completely covers the volute 50, so that the airflow is blocked by the blocking portion 74, and no airflow directly impacts the bottom of the volute 50, which further reduces noise.

Preferably, the connection line between the blocking portion 74 and the wind passage portion 72 at the center of the rotor 30 is the first connecting line, and the connecting line between the end of the volute tongue 50 facing the blocking portion 74 and the center of the rotor 30 is the second connecting line, The included angle α between the first connecting line and the second connecting line is 30°-45°, which indirectly makes the width of the blocking portion 74 more reasonable, which can optimize the airflow pattern to reduce noise without affecting the normal wind flow of the grid 70 function.

Referring to FIG. 2 , in some embodiments, the air passage portion 72 is provided with a plurality of air passage holes 71 , and the air passage holes 71 include an inlet section (not shown in the figure) and an outlet section (not shown in the figure) that are sequentially distributed in the air passage direction. (shown), that is, the direction of the airflow passing through the air hole 71 is the direction from the inlet section to the outlet section. The inner wall of the inlet section is arranged in an arc-shaped outward expansion, so as to guide the air flow into the air passage hole 71 more smoothly and smoothly through the outwardly expanded arc-shaped surface, increase the air flow rate, and reduce the noise when the air flow passes through the grid 70 .

It can be understood that in other embodiments, the inner wall of the outlet section is arranged in an arc-shaped outward expansion, so as to guide the air flow to flow out of the air hole 71 more smoothly and smoothly through the outwardly expanded arc surface, increase the air flow rate, and reduce the air flow through the air flow hole 71. Noise at grid 70. It can also be understood that, in other embodiments, the inner wall of the inlet section is arranged to expand outward in an arc shape, and the inner wall of the outlet section is also arranged to expand outward in an arc shape, so that the airflow flows into and out of the air hole 71 more smoothly and smoothly, improving the flow rate. Air flow and reduce the noise when the air flows through the grille 70.

In some embodiments, the air passage portion 72 includes a plurality of transverse bars and a plurality of longitudinal bars, and the plurality of transverse bars and the plurality of longitudinal bars are interlaced to form a grid-like structure having a plurality of air passage holes 71 . For example, a plurality of transverse bars are distributed at intervals in one direction, and a plurality of longitudinal bars are distributed at intervals in a different direction, so that the plurality of transverse bars and the plurality of longitudinal bars are staggered, and the adjacent two transverse bars and the adjacent two longitudinal bars are staggered. The ribs are enclosed to form a quadrangular air passage hole 71 . It can be understood that, in other embodiments, the air passage hole 71 may also have other shapes such as a circle, an ellipse, and the like, which are not limited herein.

Specifically, in one embodiment, at least part of the transverse ribs are arranged in arcs at both ends along the air passing direction. After the airflow flowing to the grid 70 contacts the arc-shaped ends of the transverse ribs, it can enter the air passing holes 71 more smoothly, reducing the size of the air flow. Windward resistance, speed up the flow rate, increase the air flow, and reduce the noise when the air flows through the transverse bars.

Specifically, in another embodiment, at least part of the longitudinal ribs are arranged in arcs at both ends along the air passing direction, and the airflow flowing to the grid 70 can smoothly enter the air passing holes 71 after contacting the arc-shaped ends of the longitudinal ribs. , reduce the wind resistance, speed up the flow rate, increase the airflow, and reduce the noise when the airflow flows through the transverse bars.

Specifically, in another embodiment, at least some of the transverse ribs are arranged in arcs at both ends along the wind passing direction, and at least some longitudinal ribs are also arranged in arcs at both ends along the wind passing direction, and the airflow flowing to the grid 70 contacts the longitudinal ribs. After the arc-shaped end and the arc-shaped end of the transverse rib can enter the air passage 71 relatively smoothly, the windward resistance is reduced, the flow velocity is accelerated, the air flow is increased, and the noise when the air flows through the transverse rib is reduced.

Please refer to FIG. 3 , optionally, the longitudinal section of at least part of the transverse rib is waist-shaped, and the waist-shaped has a head and a tail in the reverse wind direction, the head and tail are arc-shaped, and the radius of the arc of the head is R ₁ is 0.5 of the distance L between the center of the head circle and the center of the tail, and the arc radius R ₂ of the tail is 0.3 times the distance between the center of the head and the circle L of the tail, and the distance L between the center of the head and the center of the tail can be 6 -8mm.

Optionally, the longitudinal section of at least part of the longitudinal rib is waist-shaped, and the waist-shaped has a head and a tail in the reverse wind direction, the head and tail are arc-shaped, and the arc radius R ₁ of the head is the head. The distance L between the center of the circle and the center of the tail is 0.5, and the arc radius R ₂ of the tail is 0.3 times the distance between the center of the head and the circle L of the tail. The distance L between the center of the head and the center of the tail can be 6-8mm.

Referring to FIG. 1 , in some embodiments, the air duct assembly 100 further includes an air deflector 60 disposed in the housing 10 , one end of the air deflector 60 is connected to the inner wall of the housing 10 , and the other end of the air deflector 60 faces the grille The grid 70 extends, and the air guide plate 60 and the grid 70 are arranged around the outside of the wind wheel 30 and enclose to form an air guide space 61 that communicates with the air outlet 14 . The airflow flows into the air guide space 61 from the air inlet 12 through the grille 70, and then flows out from the air outlet 14 under the guidance of the air guide plate 60, and the air guide plate 60 blocks and collects the air flow sucked by the wind wheel 20 to improve the flow rate from the air outlet. 14 Exhaust airflow.

Referring to FIG. 1 , in some embodiments, the air duct assembly 100 further includes a heating element 80 , and the heating element 80 can extend into the air outlet 14 to heat the airflow flowing through the air outlet 14 , and the warm air is sent out from the air outlet 14 to achieve Heating function.

Please refer to FIG. 1 and FIG. 4 . Specifically, the heating element 80 reciprocates between a first position extending into the air outlet 14 and a second position exiting the air outlet 14 . When the heating element 80 moves to the first position, it extends into the air outlet 14 and can heat the air flowing through the air outlet 14. At this time, the air output from the air outlet 14 is warm air, and the air duct assembly 100 is in the heating mode; When the heating element 80 moves to the second position, it exits the air outlet 14, and the airflow that does not flow through the air outlet 14 is heated. At this time, the air output from the air outlet 14 is cold air, and the air duct assembly 100 is in the cooling mode. In this way, the air duct assembly 100 not only has a cooling mode, but also a heating mode, and the functions are more diversified.

Further, the heating element 80 is rotatably disposed on the casing 10 and rotates between the first position and the second position, and through the rotation of the heating element 80 relative to the casing 10, the air duct assembly 100 is set between the heating mode and the cooling mode. switch between. Moreover, the inner wall of the casing 10 is provided with a groove for accommodating the heating plate rotated to the second position. When the heating plate does not extend into the air outlet 14, it can be accommodated in the groove without protruding from the inner surface of the casing 10, and does not affect airflow.

Please refer to FIG. 1 again. Specifically, the heating element 80 is a PTC (thermistor) board, which has better heating performance. Preferably, the thickness a of the PTC board is 3-5mm, and the length b of the PTC board along the vertical axis of rotation is 30-35mm, so when the PTC board extends into the air outlet 14, it can not only heat the airflow, but also affect the airflow. smaller.

It can be understood that, in other embodiments, the heating element 80 may also be slidably disposed relative to the air outlet 14, which is not limited herein.

In some embodiments, the air duct assembly 100 further includes a wet curtain 90. The wet curtain 90 is arranged between the air inlet 12 and the grille 70, and is used to humidify the airflow flowing to the wind wheel 30, which can increase the humidity of the airflow discharged from the air duct assembly 100. , to improve the wind feeling experienced by the user.

Based on the same inventive concept, the present application also provides an air-conditioning fan, including the above-mentioned air duct assembly 100, which has low noise during operation, large air output, and has dual functions of cooling and heating.

The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity, all possible combinations of the technical features in the above-described embodiments are not described. However, as long as there is no contradiction between the combinations of these technical features, All should be regarded as the scope described in this specification.

The above-mentioned embodiments only represent several embodiments of the present invention, and the descriptions thereof are specific and detailed, but should not be construed as a limitation on the scope of the invention patent. It should be pointed out that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can also be made, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention should be subject to the appended claims.

Claims (12)

1. An air duct assembly, comprising:

the air conditioner comprises a shell (10), wherein an air inlet (12) and an air outlet (14) which are communicated with each other are formed in the shell (10);

the wind wheel (30) is arranged in the shell (10) and is positioned between the air inlet (12) and the air outlet (14);

the volute tongue (50) is arranged on the inner wall of the shell (10) corresponding to the air outlet (14), and a gap is reserved between the volute tongue and the wind wheel (30); and

the grid (70) is arranged between the wind wheel (30) and the air inlet (12);

the grid (70) is provided with an air passing part (72) and a blocking part (74), the air passing part (72) is communicated with the air inlet (12), and the blocking part (74) is arranged on the inner wall of the shell (10) relative to the volute tongue (50).

2. The air duct assembly according to claim 1, characterized in that an orthographic projection of the blocking portion (74) towards the volute tongue (50) completely covers the volute tongue (50).

3. The air duct assembly according to claim 1, wherein a connecting line between a connecting position of the blocking portion (74) and the air passing portion (72) and a circle center of the wind wheel (30) is a first connecting line, and a connecting line between one end of the volute tongue (50) facing the blocking portion (74) and the circle center of the wind wheel (30) is a second connecting line;

the included angle (α) between the first connecting line and the second connecting line is 30-45 degrees.

4. The air duct assembly according to any one of claims 1 to 3, wherein the air passing portion (72) is provided with a plurality of air passing holes (71), and the air passing holes (71) comprise an inlet section and an outlet section which are sequentially distributed in the air passing direction;

the inner wall of the inlet section is arranged in an arc shape and expands outwards; and/or

The inner wall of the outlet section is in an arc shape and is expanded outwards.

5. The air duct assembly according to claim 4, characterized in that the air passing portion (72) comprises a plurality of transverse ribs and a plurality of longitudinal ribs, which are staggered to form a grid-like structure with a plurality of air passing holes (71);

at least part of the transverse ribs are arranged in an arc shape along two ends of the wind passing direction; and/or

At least part of the longitudinal ribs are arranged in an arc shape along the connecting end in the air passing direction.

6. The air duct assembly of claim 5, wherein at least some of the transverse ribs are kidney-shaped in longitudinal cross-section; and/or

At least part of the longitudinal ribs are waist-shaped in longitudinal section.

7. The air duct assembly of claim 1, further comprising a heating element (80), the heating element (80) being extendable into the air outlet (14).

8. The air duct assembly of claim 7, wherein the heating element (80) reciprocates between a first position extending into the air outlet (14) and a second position exiting the air outlet (14).

9. The air duct assembly of claim 8, wherein the heating element (80) is rotatably disposed in the housing (10) and rotates between the first position and the second position.

10. The air duct assembly of claim 1, further comprising a wet curtain disposed between the air intake (12) and the grill (70).

11. The air duct assembly of claim 1, further comprising an air deflector disposed within the housing, one end of the air deflector being connected to an inner wall of the housing, the other end of the air deflector extending toward the grille;

the wind deflector and the grids are wound outside the wind wheel and form a wind guiding space communicated with the air outlet in a surrounding mode.

12. An air conditioning fan, characterized in that it comprises an air duct assembly (100) according to any one of the preceding claims 1 to 10.

Images