Air conditioner air outlet assembly and air conditioner

Abstract

The invention provides an air conditioner air outlet assembly and an air conditioner, and relates to the technical field of air conditioners, the air conditioner air outlet assembly comprises a cross-flow fan blade, a volute back plate and a volute tongue, and the cross-flow fan blade comprises a plurality of fan blade bodies which are sequentially spliced in the axis direction; an air outlet channel extending to the cross-flow fan blade is formed between the volute tongue and the volute back plate; wherein the volute tongue extends in the axis direction, the end of each fan blade body is used for being connected with the adjacent fan blade body, and the width of a gap between the middle of each fan blade body and the volute tongue is larger than that of a gap between the end of each fan blade body and the volute tongue. Compared with the prior art, the air conditioner air outlet assembly provided by the invention has the advantages that the gap between the fan blade body and the volute tongue can be reduced near the end part of the fan blade body, so that the backflow phenomenon at the gap is inhibited, the air flow entering the cross-flow fan blade is more stable, the unstable condition of the circulating vortex is inhibited, the air flow fluctuation is avoided, and the air supply noise is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning, and in particular to an air conditioning air outlet component and an air conditioner. Background Art

[0002] In recent years, in order to improve the energy efficiency of wall-mounted air conditioner indoor units, the outer diameter of the impeller and the air duct of the heat exchanger and crossflow fan have been continuously expanded. In addition, for the consideration of air purification and internal cleaning, it has gradually become a trend to equip the indoor unit with high-performance filters and cleaning mechanisms. However, these structures installed in the indoor unit of the wall-mounted air conditioner will increase the load resistance of the crossflow fan. Even if the outer diameter of the crossflow fan is enlarged and the fan speed is reduced, the fan air supply noise is still more and more significant.

[0003] In a conventional wall-mounted air conditioner indoor unit, a heat exchanger is installed in the upstream air inlet duct of the indoor unit, and a crossflow fan blade is installed in the downstream air duct. The back of the crossflow fan blade is equipped with a volute, the front is equipped with a volute tongue, and the downstream air outlet side is equipped with a horizontal air guide plate and left and right air guide plates for controlling the wind direction. When the back plate and the volute tongue are installed, a certain gap must be maintained with the outer diameter of the crossflow fan blade in the axial direction of the crossflow fan blade, that is, the minimum gap S.

[0004] The inventors have found that crossflow fans usually adopt a split-jointed structure, which is composed of multiple blades. As the outer diameter of the crossflow blade increases, even if the blade speed is reduced, near the joint of the blade body, due to structural changes and the weakening of the blade's guiding effect, it is easier for the airflow to flow back from the wind outlet side of the blade to the wind inlet side through the gap between the volute tongue and the crossflow blade, causing the circulating vortex generated in the crossflow blade to be locally unstable, which in turn causes the airflow through the crossflow blade to be unstable, resulting in airflow fluctuations and air supply noise. Summary of the invention

[0005] The problem solved by the present invention is how to reduce the air supply noise and stabilize the airflow.

[0006] To solve the above problems, the present invention adopts the following technical solutions.

[0007] In one aspect, the present invention provides an air outlet assembly for an air conditioner, comprising:

[0008] A crossflow fan blade, the crossflow fan blade comprising a plurality of fan blade bodies sequentially spliced ​​along an axial direction;

[0009] A volute back plate, the volute back plate is arranged at intervals on the back side of the crossflow fan blade;

[0010] A volute tongue, the volute tongue being arranged at intervals on the front side of the crossflow fan blade, and an air outlet passage extending to the crossflow fan blade is formed between the volute tongue and the volute back plate;

[0011] In which, the volute tongue extends along the axial direction and cooperates with the gaps of multiple blade bodies, the end of each blade body is used to connect with the adjacent blade body, and the gap width between the middle part of each blade body along the axial direction and the volute tongue is greater than the gap width between the end of the blade body along the axial direction and the volute tongue.

[0012] The air outlet assembly of the air conditioner provided by the embodiment of the present invention extends the volute tongue along the axial direction and cooperates with the gap of the cross-flow blade formed by splicing a plurality of blade bodies. The end of each blade body is used to connect with the adjacent blade body, and the gap width between the middle part of each blade body along the axial direction and the volute tongue is greater than the gap width between the end of the blade body along the axial direction and the volute tongue, so that the gap between the end connection of the blade body and the volute tongue is relatively smaller, so the flow resistance in the gap near the end of the blade body increases, so that the air flow passing through the gap can be reduced, the backflow phenomenon is slowed down, and the air flow tends to flow out from the air outlet channel, avoiding the local instability of the circulating flow generated in the cross-flow blade, making the gas passing through the cross-flow blade more stable, avoiding air flow fluctuations, and reducing air supply noise. Moreover, the gap between the middle position of the blade body and the volute tongue is wider, and the air flow is mainly guided by the blade body at this time, which can ensure that the air flow flows into the air outlet channel and ensure the normal air outlet effect. Compared with the prior art, the air-conditioning air outlet assembly provided by the present invention can reduce the gap between the end of the fan blade body and the volute tongue while ensuring the air outlet effect, thereby suppressing the backflow phenomenon at the gap, and further making the airflow entering the cross-flow fan blade more stable, and the instability of the circulating vortex is suppressed, thereby avoiding airflow fluctuations and reducing air supply noise.

[0013] Furthermore, each of the wind blade bodies includes an annular end plate and a plurality of blades, wherein the plurality of blades are mounted on one side of the annular end plate and are distributed in an annular manner to form an annular blade group, and the other side of the annular end plate is used to connect adjacent annular blade groups, and the gap width between the middle part of the annular blade group and the volute tongue is greater than the gap width between the end part of the annular blade group and the volute tongue.

[0014] The air outlet assembly of the air conditioner provided by the embodiment of the present invention fixes multiple blades through an annular end plate, has a good fixing effect, and can be easily assembled and spliced ​​to form a crossflow blade. Since the setting of the annular end plate is the main factor of the backflow phenomenon, the gap width between the middle part of the annular blade group and the volute tongue is greater than the gap width between the end of the annular blade group and the volute tongue, which can further reduce the gap width near the annular end plate, thereby reducing the influence of the setting of the annular end plate on the airflow circulation and suppressing the instability of the circulation vortex.

[0015] Furthermore, the side of the volute tongue close to the crossflow fan blade has a plurality of spaced-apart front end protrusions, the plurality of front end protrusions are arranged corresponding to the ends of the plurality of annular blade groups, and two adjacent front end protrusions separate the side of the volute tongue close to the crossflow fan blade into a plurality of front end fitting portions, the plurality of front end fitting portions are arranged corresponding to the middle portions of the plurality of annular blade groups, and the gap width S1 between the front end fitting portion and the middle portion of the annular blade group is greater than the gap width S2 between the front end protrusion and the end portion of the annular blade group.

[0016] The air outlet assembly of the air conditioner provided by the embodiment of the present invention can make the volute tongue present an uneven structure as a whole by setting a plurality of front end protrusions and a plurality of front end matching parts that are alternately distributed in sequence, and make the gap width between the front end matching part and the crossflow fan blade larger, thereby improving the blade pressure change caused by being too close to the blade, thereby suppressing the rotation noise caused by the pressure change. The gap width between the front end protrusion and the crossflow fan blade is smaller, and the front end protrusion corresponds to the end of the plurality of annular blade groups, which can further suppress the backflow phenomenon caused by the annular end plate at the gap, thereby making the airflow entering the crossflow fan blade more stable, suppressing the instability of the circulating vortex, avoiding airflow fluctuations, and reducing air supply noise.

[0017] Furthermore, the front end raised portion has transition arc surfaces at both ends along the axial direction, and the transition arc surfaces extend to the surface of the front end matching portion, so that the front end matching portion and the front end raised portion have a smooth transition.

[0018] The air outlet assembly of the air conditioner provided by the embodiment of the present invention has transition arc surfaces at both ends of the front end raised portion, which can make a smooth transition between the front end matching portion and the front end raised portion, avoid the sudden change of pressure and wind resistance caused by the sudden change of the local structure, and thus avoid the local vortex phenomenon of the air flow. At the same time, by setting the transition arc surface, it is more convenient to demould when forming the front end raised portion, which is convenient for preparation.

[0019] Furthermore, a gap width S1 between the front end fitting portion and the middle portion of the annular blade group is 0.033-0.6 times the outer diameter D of the annular blade group; a gap width S2 between the front end protrusion and the end portion of the annular blade group is 0.02-0.033 times the outer diameter D of the annular blade group.

[0020] The air-conditioning air outlet assembly provided in the embodiment of the present invention reasonably limits the gap width S1 and the gap width S2 so that the middle and end parts of the annular blade group can be configured within a reasonable gap range, thereby reducing the rotational noise caused by pressure changes while reducing the air supply noise.

[0021] Further, the width La of the front end matching portion along the axial direction and the width Lb of the annular blade group along the axial direction satisfy the following relationship:

[0022] La≥0.7×Lb.

[0023] The air-conditioning air outlet assembly provided in the embodiment of the present invention can improve the pressure change (pressure rise) of the blades caused by the volute tongue being too close to the blade body as much as possible by reasonably limiting the distribution range of the front end matching part, thereby suppressing the rotational noise caused by the pressure change.

[0024] Further, the distance Lc between the front end matching portion and the adjacent annular end plate in the axial direction and the width Lb of the annular blade group along the axial direction satisfy the following relationship:

[0025] Lc≤0.15×Lb.

[0026] The air-conditioning air outlet assembly provided by the embodiment of the present invention can suppress the rotational noise caused by pressure changes while ensuring the suppression of the backflow phenomenon in the gap near the annular end, by reasonably limiting the distribution range of the front end protrusion and reasonably matching it with the distribution range of the front end matching part, thereby ensuring that the airflow entering the cross-flow fan blade is more stable, the instability of the circulating vortex is suppressed, the airflow fluctuation is avoided, and the air supply noise is reduced.

[0027] Furthermore, the crossflow blade is provided with disc-shaped end plates at both ends along the axial direction, and the end plates are connected to the annular blade groups located at both ends, and the width Ld of the front end matching part corresponding to the middle part of at least one annular blade group connected to the disc-shaped end plate along the axial direction is smaller than the width La of the remaining front end matching parts along the axial direction.

[0028] Furthermore, the distance Le between the front end matching portion corresponding to the middle part of at least one annular blade group connected to the disc-shaped end plate and the adjacent annular end plate in the axial direction is greater than the distance Lc between the remaining front end matching portions and the adjacent annular end plates in the axial direction.

[0029] The air outlet assembly of the air conditioner provided in the embodiment of the present invention limits the volute tongue structure at the edge position. When the edge of the fan blade body is close to the disc-shaped end plate, the airflow flowing into the fan blade body at both ends of the cross-flow fan blade can be stabilized even under low-wind and silent conditions with less air volume, thereby suppressing the fluctuation of the circulation vortex, reducing the air supply noise of the fan blade bodies at both ends, and thereby reducing the overall noise.

[0030] On the other hand, the present invention provides an air conditioner, comprising a heat exchanger, a shell and an air conditioning air outlet assembly as described above, wherein the shell has a fan cavity, the crossflow blades are installed in the fan cavity, the air outlet channel extends to the air outlet side of the fan cavity, and the heat exchanger is arranged in the shell and is located on the air inlet side of the fan cavity. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of an air outlet structure in the prior art;

[0032] Figure 2 for Figure 1 Schematic diagram of airflow status at UU in the middle;

[0033] Figure 3 for Figure 1 Schematic diagram of airflow status at VV in the middle;

[0034] Figure 4 A schematic structural diagram of an air-conditioning outlet assembly provided by a first embodiment of the present invention at a first viewing angle;

[0035] Figure 5 for Figure 4 Schematic diagram of the assembly structure of the central crossflow fan blade and the volute tongue;

[0036] Figure 6 for Figure 5 Schematic diagram of the cross section at AA in the middle;

[0037] Figure 7 for Figure 5 Schematic diagram of the cross section at BB;

[0038] Figure 8 for Figure 6 Schematic diagram of the middle airflow state;

[0039] Fig. 9 for Figure 7 Schematic diagram of the middle airflow state;

[0040] Fig.10 A schematic diagram of the partial structure of an air-conditioning outlet assembly provided in a second embodiment of the present invention;

[0041] Fig.11 A schematic structural diagram of an air-conditioning air outlet assembly provided in a third embodiment of the present invention;

[0042] Fig.12 A schematic diagram of the partial structure of an air-conditioning outlet assembly provided in a third embodiment of the present invention;

[0043] Fig.13 It is a structural schematic diagram of an air-conditioning outlet assembly in another preferred embodiment of the present invention;

[0044] Fig.14 A schematic structural diagram of an air conditioner provided in accordance with a fourth embodiment of the present invention.

[0045] Description of reference numerals:

[0046] 100-air conditioner outlet assembly; 110-crossflow fan blade; 111-disc-shaped end plate; 130-volute back plate; 150-volute tongue; 151-front end protrusion; 153-front end mating portion; 155-transition arc surface; 170-fan blade body; 171-annular end plate; 173-blade; 175-annular blade group; 190-air outlet channel; 200-air conditioner; 210-heat exchanger; 230-housing. DETAILED DESCRIPTION

[0047] As disclosed in the background technology, in the wall-mounted air conditioner indoor unit of the prior art, a heat exchanger is installed in the upstream air inlet duct inside the indoor unit, and a crossflow fan blade is installed in its downstream air duct, a volute is installed on the back of the crossflow fan blade, a volute tongue is installed on the front, and a horizontal air guide plate and left and right air guide plates for controlling the wind direction are installed on the downstream air outlet side. And when the back plate and the volute tongue are installed, a certain gap, that is, the minimum gap S, must be maintained with the outer diameter of the crossflow fan blade in the axial direction of the crossflow fan blade.

[0048] The following further explains the air supply noise and air flow fluctuation caused by the indoor unit of the wall-mounted air conditioner in the conventional technology:

[0049] Crossflow blades are usually made of multiple blade bodies, and the blade bodies are first injection molded and then ultrasonically welded together to form crossflow blades. However, in previous wall-mounted air conditioner indoor units, if the load resistance (wind resistance) of the crossflow blade increases, the fan operating point will shift to the low air volume side as the crossflow blade expands as a whole, and the air outlet speed in the radial direction corresponding to the outlet air volume of the blade body will decrease.

[0050] The inventor has found through research that the conventional design of the air outlet structure, such as Figure 1 As shown, due to the special structure of the volute tongue, in order to avoid the rotation noise caused by the increase of the air supply pressure, the minimum gap between the volute tongue and the crossflow fan blade in the conventional technology is kept within a certain range, and the gap width is the same at all places. This situation will cause the backflow phenomenon to occur easily at the minimum gap, and cause the circulation vortex to be turbulent, and then cause the defects of unstable airflow and large air supply noise. The following is a specific explanation. Figure 1 The UU section in the figure shows the state of the fluid near the tongue. Figure 2As shown, in the fan body, the airflow F1 flows out along the blade near the middle of the blade axial length, so the velocity vector C1 of the outflowing fluid is the synthesis of the circumferential component C1u generated with the rotation of the impeller and the radial component C1r generated with the air volume. The outlet airflow F1 and the circulation vortex A1 are formed on the outlet air duct formed by the volute tongue and the back plate.

[0051] But in Figure 1 In the VV section, the corresponding state of the fluid near the volute tongue is as follows Figure 3 As shown, near the end joint of the fan blade body, due to structural changes, for example, the plate-like joint structure itself will affect the flow of the fluid, and the friction resistance generated by the side of the plate-like structure will further cause a part of the air volume passing through the blades to decrease. The velocity vector C2 of the corresponding outlet airflow is synthesized by the circumferential component (velocity) C2u generated by the rotation of the impeller and the radial component C2r generated by the decreased air volume. At this time, the outlet airflow is sharply biased toward one side of the volute tongue at the outlet. Therefore, a part of the airflow F2 passes through the gap between the volute tongue and the fan blade body, and flows back to the air inlet side between the heat exchanger and the fan blade body 170. And at this time, when the fluid passes through the minimum gap of the volute tongue, a jet is formed, which collides with the fluid passing through the heat exchanger and flows into the fan blade body, causing the circulation vortex A2 to become unstable.

[0052] In conventional wall-mounted air conditioner indoor units, as the outer diameter of the crossflow fan blades increases, even if the fan blade speed is reduced, the circulating vortex generated in the impeller will still cause local instability, and the airflow through the impeller will be unstable, resulting in fluctuating and harsh air supply noise.

[0053] In order to solve the above problems, the present invention provides a new type of air conditioner outlet assembly, which can reduce air supply noise and stabilize airflow. In order to make the above objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0054] First embodiment

[0055] See also Figures 4 to 7 The present embodiment provides an air-conditioning air outlet component 100, which can ensure the air outlet effect while making the airflow more stable, suppressing the instability of the circulation vortex, avoiding airflow fluctuations, and reducing air supply noise.

[0056] The air-conditioning air outlet assembly 100 provided in this embodiment includes a crossflow blade 110, a volute back plate 130 and a volute tongue 150. The crossflow blade 110 includes a plurality of blade bodies 170 sequentially spliced ​​along the axial direction; the volute back plate 130 is arranged at intervals on the back of the crossflow blade 110; the volute tongue 150 is arranged at intervals on the front of the crossflow blade 110, and an air outlet channel 190 extending to the crossflow blade 110 is formed between the volute tongue 150 and the volute back plate 130; wherein the volute tongue 150 extends along the axial direction and is gap-matched with a plurality of blade bodies 170, an end of each blade body 170 is used to connect with an adjacent blade body 170, and the gap width between the middle part of each blade body 170 along the axial direction and the volute tongue 150 is greater than the gap width between the end of the blade body 170 along the axial direction and the volute tongue 150.

[0057] In this embodiment, the air outlet assembly 100 of the air conditioner is suitable for a wall-mounted air conditioner indoor unit, and the basic structure of the wall-mounted air conditioner indoor unit can refer to the relevant description in the prior art. In this embodiment, the upper side of the crossflow fan blade 110 constitutes the air inlet side, and the lower side constitutes the air outlet side, and the front and back sides of the crossflow fan blade 110 are respectively matched with the volute tongue 150 and the volute back plate 130.

[0058] It is worth noting that in the present embodiment, the volute tongue 150 is extended along the axial direction and is gap-matched with the cross-flow fan blade 110 formed by splicing a plurality of fan blade bodies 170. The end of each fan blade body 170 is used to connect with the adjacent fan blade body 170, and the gap width between the middle part of each fan blade body 170 along the axial direction and the volute tongue 150 is greater than the gap width between the end of the fan blade body 170 along the axial direction and the volute tongue 150, so that the gap between the end connection of the fan blade body 170 and the volute tongue 150 is relatively smaller, so that the flow resistance in the gap near the end of the fan blade body 170 is increased, thereby reducing the outlet airflow passing through the gap, slowing down the backflow phenomenon, and making the airflow tend to flow out from the air outlet channel 190, avoiding local instability of the circulating flow generated in the cross-flow fan blade 110, making the gas passing through the cross-flow fan blade 110 more stable, avoiding airflow fluctuations, and reducing air supply noise. Moreover, the gap between the middle position of the fan blade body 170 and the volute tongue 150 is relatively wide. At this time, the airflow is mainly guided by the fan blade body 170, which can ensure that the airflow flows into the air outlet channel 190 and avoid the rotation noise caused by excessive air supply pressure, thereby ensuring normal air outlet effect.

[0059] Each fan blade body 170 includes an annular end plate 171 and a plurality of blades 173. The plurality of blades 173 are mounted on one side of the annular end plate 171 and are distributed in an annular manner to form an annular blade group 175. The other side of the annular end plate 171 is used to connect adjacent annular blade groups 175. The gap width between the middle of the annular blade group 175 and the volute tongue 150 is greater than the gap width between the end of the annular blade group 175 and the volute tongue 150. Specifically, in order to improve the self-noise of the crossflow fan blade 110, especially the rotation noise caused by the pressure change caused by the rotation of the blades 173, the plurality of blades 173 in the adjacent fan blade bodies 170 are often arranged in an offset manner to form unequal spacing, so that they have a pressure change phase. At the same time, when the fan blade bodies 170 are connected and assembled, the blades 173 will deviate from the center of the fan blade body 170 by a certain angle. Specifically, a plurality of fan blade bodies 170 can be injection molded first, and then ultrasonically welded to each other to form the crossflow fan blade 110. The plurality of blades 173 are fixed by the annular end plate 171, and the fixing effect is good, and it is easy to assemble and splice to form the crossflow fan blade 110. Since the setting of the annular end plate 171 is the main factor of the backflow phenomenon, the gap width between the middle part of the annular blade group 175 and the volute tongue 150 is greater than the gap width between the end of the annular blade group 175 and the volute tongue 150, which can further reduce the gap width near the annular end plate 171, thereby reducing the influence of the setting of the annular end plate 171 on the airflow circulation and suppressing the instability of the circulation vortex.

[0060] It should be noted that in the middle area of ​​the annular blade group 175 in this embodiment, due to the guiding effect of the blade 173 and the airflow is not affected by other structures, most of the airflow will flow to the air outlet channel 190 under the guiding effect of the blade 173. At the end of the annular blade 173, the annular end plate 171 is provided, which will affect the guiding effect of the blade 173. The annular end plate 171 can play a role of structural support, and near the annular end plate 171, the annular end plate 171 itself will affect the flow of airflow, and the friction resistance generated by the side of the annular end plate 171 will further cause the air volume passing through the blades 173 to decrease, the guiding effect of the blade 173 is reduced, and the airflow has a tendency to pass through the gap near the annular end. At this time, by reducing the width of the gap near the annular end plate 171, the flow resistance in the gap can be increased, and the airflow passing through the gap near the annular end plate 171 can be reduced, thereby reducing the impact of the setting of the annular end plate 171 on the air circulation and suppressing the instability of the circulation vortex. Therefore, in the gap near the annular end plate 171, the airflow also flows out along the air outlet channel 190.

[0061] It should also be noted that the middle of the annular blade group 175 in this embodiment refers to the middle area of ​​the annular blade group 175 along the axial length direction, that is, the area where the airflow is not affected by the annular end plate 171. The end of the annular blade group 175 in this embodiment refers to the area near the annular end plate 171 and connected to the annular end plate 171, and the airflow in this area is affected by the annular end plate 171. The axial direction in this embodiment refers to the rotation axis direction of the crossflow fan blade 110, that is, the center line direction of the rotation axis of the crossflow fan blade 110.

[0062] In this embodiment, the side of the volute tongue 150 close to the crossflow fan blade 110 has a plurality of front end protrusions 151 distributed at intervals, the plurality of front end protrusions 151 are arranged corresponding to the ends of the plurality of annular blade groups 175, and two adjacent plurality of front end protrusions 151 divide the side of the volute tongue 150 close to the crossflow fan blade 110 into a plurality of front end matching parts 153, the plurality of front end matching parts 153 are arranged corresponding to the middle parts of the plurality of annular blade groups 175, and the gap width S1 between the front end matching part 153 and the middle part of the annular blade group 175 is greater than the gap width S2 between the front end protrusion 151 and the end part of the annular blade group 175. Specifically, the side of the volute tongue 150 close to the crossflow fan blade 110 refers to the side of the part of the volute tongue 150 extending toward the crossflow fan blade 110, which is directly opposite to the crossflow fan blade 110 and has a gap matching with the crossflow fan blade 110. By providing a plurality of front end protrusions 151 and a plurality of front end matching portions 153 that are alternately distributed in sequence, the volute tongue 150 can be made to present an uneven structure as a whole, and the gap width between the front end matching portion 153 and the crossflow fan blade 110 can be made larger, thereby improving the pressure change of the blade 173 caused by being too close to the blade 173, thereby suppressing the rotation noise caused by the pressure change. The gap width between the front end protrusion 151 and the crossflow fan blade 110 is smaller, and the front end protrusion 151 corresponds to the end of the plurality of annular blade groups 175, which can further suppress the backflow phenomenon caused by the annular end plate 171 in the gap, thereby making the airflow entering the crossflow fan blade 110 more stable, suppressing the instability of the circulation vortex, avoiding airflow fluctuations, and reducing air supply noise.

[0063] In this embodiment, at least one end of the front end protrusion 151 along the axial direction has a transition arc surface 155, and the transition arc surface 155 extends to the surface of the front end matching portion 153, so that the front end matching portion 153 and the front end protrusion 151 can smoothly transition. Specifically, both ends of the front end protrusion 151 located in the middle area of ​​the volute tongue 150 have transition arc surfaces 155, so as to smoothly transition with the front end matching portions 153 on both sides, and one end of the front end protrusion 151 located at the edge of the volute tongue 150 has a transition arc surface 155, and the other end can be engaged with the mounting plate on the side of the air outlet channel 190. In this embodiment, by setting the transition arc surface 155 at both ends of the front end protrusion 151, a smooth transition between the front end matching portion 153 and the front end protrusion 151 can be achieved, avoiding the sudden change of pressure and wind resistance caused by the sudden change of the local structure, thereby avoiding the local vortex phenomenon of the airflow. At the same time, by setting the transition arc surface 155, it is more convenient to demould when forming the front end protrusion 151, which is convenient for preparation.

[0064] Further, the gap width S1 between the front end fitting portion 153 and the middle portion of the annular blade set 175 is 0.033-0.6 times the outer diameter D of the annular blade set 175; the gap width S2 between the front end protrusion 151 and the end portion of the annular blade set 175 is 0.02-0.033 times the outer diameter D of the annular blade set 175. Preferably, the gap width S1 between the front end fitting portion 153 and the middle portion of the annular blade set 175 is 0.035 times the outer diameter D of the annular blade set 175, and the gap width S2 between the front end protrusion 151 and the end portion of the annular blade set 175 is 0.03 times the outer diameter D of the annular blade set 175, so that by reasonably limiting the gap width S1 and the gap width S2, the middle portion and the end portion of the annular blade set 175 can be configured within a reasonable gap range, so that the air supply noise can be reduced while reducing the rotation noise caused by pressure changes.

[0065] In this embodiment, in combination with Figure 8 , even near the annular end plate 171 of the impeller body 170, the airflow flowing out of the impeller body 170 deviates sharply toward the side of the volute tongue 150 at the outlet position. Since the minimum gap between the volute tongue 150 and the annular blade group 175 is small, the flow resistance between the gaps is large, and a part of the outlet fluid cannot pass through the gap S2 between the front end protrusion 151 and the end of the annular blade group 175, and instead flows to the outlet channel 190. Therefore, near the annular end plate 171 of the impeller body 170, the fluid flowing into the impeller body 170 is stabilized, and the local instability of the circulating vortex is suppressed. In addition, in conjunction with reference to Fig. 9, near the middle position of the axial length of the annular blade group 175 of the blade body 170, the air flow of the blade body 170 flows out along the blade 173, so even at the minimum gap S1 position, the fluid flows out from the air outlet channel. Therefore, the circulating vortex generated in the crossflow blade 110 after the outer diameter is enlarged will not cause local instability, so that the air flow through the crossflow blade 110 becomes stable, and the air supply noise is improved.

[0066] In summary, the air-conditioning air outlet assembly 100 provided in the present embodiment extends the volute tongue 150 along the axial direction, and cooperates with the gap of the cross-flow fan blade 110 formed by splicing multiple fan blade bodies 170, and the end of each fan blade body 170 is used to connect with the adjacent fan blade body 170, and the gap width between the middle part of each fan blade body 170 along the axial direction and the volute tongue 150 is greater than the gap width between the end of the fan blade body 170 along the axial direction and the volute tongue 150, so that the gap between the end connection of the fan blade body 170 and the volute tongue 150 is relatively smaller, so the flow resistance in the gap near the end of the fan blade body 170 is increased, so that the outlet airflow can be reduced through the gap, the backflow phenomenon is slowed down, and the airflow tends to flow out from the air outlet channel 190, avoiding the local instability of the circulating flow generated in the cross-flow fan blade 110, making the gas passing through the cross-flow fan blade 110 more stable, avoiding airflow fluctuations, and reducing air supply noise. Moreover, the gap between the middle position of the fan blade body 170 and the volute tongue 150 is relatively wide, and at this time, the airflow is mainly guided by the fan blade body 170, which can ensure that the airflow flows into the air outlet channel 190 and ensure the normal air outlet effect. Compared with the prior art, the air conditioner air outlet assembly 100 provided in this embodiment can reduce the gap with the volute tongue 150 near the end of the fan blade body 170 while ensuring the air outlet effect, thereby suppressing the backflow phenomenon at the gap, thereby making the airflow entering the crossflow fan blade 110 more stable, suppressing the instability of the circulating vortex, avoiding airflow fluctuations, and reducing air supply noise.

[0067] Second embodiment

[0068] See also Fig.10 This embodiment provides an air-conditioning air outlet assembly 100, whose basic structure, principle and technical effects are the same as those of the first embodiment. For the sake of brief description, for parts not mentioned in this embodiment, reference may be made to the corresponding contents in the first embodiment.

[0069] In this embodiment, the width La of the front end matching portion 153 along the axial direction and the width Lb of the annular blade assembly 175 along the axial direction satisfy the following relationship:

[0070] La≥0.7×Lb.

[0071] Preferably, La can be 0.8 times of Lb. By reasonably limiting the distribution range of the front end matching portion 153, the pressure change (pressure rise) of the blade 173 caused by the volute tongue 150 being too close to the blade body 170 can be improved as much as possible, thereby suppressing the rotational noise caused by the pressure change.

[0072] Furthermore, the distance Lc between the front end matching portion 153 and the adjacent annular end plate 171 in the axial direction and the width Lb of the annular blade assembly 175 in the axial direction satisfy the following relationship:

[0073] Lc≤0.15×Lb.

[0074] Preferably, Lc can be 0.1 times of Lb, and the sum of Lc and Lb constitutes the air-conditioning outlet assembly 100 provided in the embodiment of the present invention. By reasonably limiting the distribution range of the front end protrusion 151 and reasonably matching it with the distribution range of the front end matching portion 153, it is possible to suppress the rotational noise caused by pressure changes while ensuring the suppression of the backflow phenomenon in the gap near the annular end, thereby ensuring that the airflow entering the cross-flow fan blade 110 is more stable, the instability of the circulating vortex is suppressed, the airflow fluctuation is avoided, and the air supply noise is reduced.

[0075] Third embodiment

[0076] The present embodiment provides an air-conditioning air outlet assembly 100, the basic structure and principle of which and the technical effects produced are the same as those of the first embodiment or the second embodiment. For the sake of brief description, parts not mentioned in this embodiment may refer to the corresponding contents of the first embodiment or the second embodiment.

[0077] See also Fig.11 and Fig.12 In this embodiment, the two ends of the crossflow fan blade 110 along the axial direction are provided with disc-shaped end plates 111, which are connected to the annular blade groups 175 located at the two ends, and the width Ld of the front end matching portion 153 corresponding to the middle part of at least one annular blade group 175 connected to the disc-shaped end plate 111 along the axial direction is smaller than the width La of the other front end matching portions 153 along the axial direction. Specifically, the width Ld of the front end matching portion 153 corresponding to the middle part of the two annular blade groups 175 connected to the disc-shaped end plates 111 along the axial direction is smaller than the width La of the other front end matching portions 153 along the axial direction, that is, the width of the front end matching portion 153 corresponding to the annular blade groups 175 located at the head and tail ends is smaller, Ld<La.

[0078] In this embodiment, the distance Le between the front end matching portion 153 corresponding to the middle portion of at least one annular blade group 175 connected to the disc-shaped end plate 111 and the adjacent annular end plate 171 in the axial direction is greater than the distance Lc between the remaining front end matching portions 153 and the adjacent annular end plates 171 in the axial direction. Specifically, the distance Le between the front end matching portions 153 corresponding to the middle portions of the two annular blade groups 175 connected to the disc-shaped end plates 111 and the adjacent annular end plates 171 in the axial direction is greater than the distance Lc between the remaining front end matching portions 153 and the adjacent annular end plates 171 in the axial direction, that is, the distance between the front end matching portions 153 corresponding to the annular blade groups 175 located at the head and tail ends and the adjacent annular end plates 171 is larger, Le>Lc.

[0079] It should be noted that, in this embodiment, the structures of the volute tongue 150 in the areas corresponding to the annular blade groups 175 at the head and tail ends are consistent, that is, in the areas corresponding to the annular blade groups 175 at the two ends, the width of the front end matching portion 153 is Ld, and Ld is smaller than the width La of the front end matching portion 153 in the areas corresponding to the remaining annular blade groups 175. At the same time, in the areas corresponding to the annular blade groups 175 at the two ends, the distance between the front end matching portion 153 and the adjacent annular end plate 171 in the axial direction is Le, and Le is larger than the distance Lc between the remaining front end matching portion 153 and the adjacent annular end plate 171 in the axial direction.

[0080] It is worth noting that in the axial direction, the distance between the disk-shaped end plate 111 and the adjacent front end fitting portion 153 in this embodiment is also Le, that is, the distance between the disk-shaped end plate 111 and the adjacent front end fitting portion 153 is equal to the distance between the front end fitting portion 153 and the adjacent annular end plate 171.

[0081] In other preferred embodiments of the present invention, Fig.13 As shown, the width Ld of the front end matching portion 153 corresponding to the middle part of one of the annular blade groups 175 connected to the disc-shaped end plate 111 along the axial direction may be smaller than the width La of the other front end matching portions 153 along the axial direction, that is, the width of the front end matching portion 153 corresponding to the annular blade group 175 located at the head end or the tail end is smaller. At the same time, the distance Lc between the front end matching portion 153 corresponding to the middle part of one of the annular blade groups 175 connected to the disc-shaped end plate 111 and the adjacent annular end plate 171 in the axial direction is greater than the distance Lc between the other front end matching portions 153 and the adjacent annular end plate 171 in the axial direction, that is, the distance between the front end matching portion 153 corresponding to the annular blade group 175 located at the head end or the tail end and the adjacent annular end plate 171 is larger.

[0082] By limiting the above structure, in addition to the technical effects brought by the first embodiment or the second embodiment, under low-wind and silent conditions with a small amount of air passing through the cross-flow fan blade 110, even under the influence of the side of the air outlet channel 190, the air volume at the fan blade bodies 170 at both ends of the cross-flow fan blade 110 is significantly reduced, and the outlet airflow at the outlet position is sharply deflected toward the side of the volute tongue 150 from the axial center position of the fan blade body 170 near the annular end plate 171, and the deflection range is larger than that of other fan blade bodies 170 except the two ends. Since the minimum gap between the volute tongue 150 and the end of the fan blade body 170 is very small, the resistance of the fluid passing through the gap is very large. A part of the outlet airflow cannot pass through the gap S2 between the front end protrusion 151 and the end of the annular blade group 175, and instead flows to the air outlet channel 190. Therefore, even under low-wind and silent conditions with a small amount of air, the airflow flowing into the fan blade body 170 at both ends of the cross-flow fan blade 110 can be stabilized, thereby suppressing the fluctuation of the circulating vortex.

[0083] The air-conditioning air outlet assembly 100 provided in this embodiment limits the structure of the volute tongue 150 at the edge position. When the edge of the fan blade body 170 is close to the disc-shaped end plate 111, the airflow flowing into the fan blade body 170 at both ends of the cross-flow fan blade 110 can be stabilized even under low-wind and silent conditions with less air volume, thereby suppressing the fluctuation of the circulation vortex, reducing the air supply noise of the fan blade bodies 170 at both ends, and thus reducing the overall noise.

[0084] Fourth embodiment

[0085] See also Fig.14 This embodiment provides an air conditioner 200, including a heat exchanger 210, a shell 230 and an air-conditioning outlet assembly 100, wherein the basic structure and principle of the air-conditioning outlet assembly 100 and the technical effects produced are the same as those of the first embodiment, the second embodiment or the third embodiment. For the sake of brief description, for parts not mentioned in this embodiment, reference may be made to the corresponding contents in the first embodiment, the second embodiment or the third embodiment.

[0086] The air conditioner 200 provided in this embodiment includes a heat exchanger 210, a shell 230 and an air-conditioning outlet assembly 100. The air-conditioning outlet assembly 100 includes a cross-flow blade 110, a volute back plate 130 and a volute tongue 150. The cross-flow blade 110 includes a plurality of blade bodies 170 sequentially spliced ​​along the axial direction; the volute back plate 130 is arranged at intervals on the back of the cross-flow blade 110; the volute tongue 150 is arranged at intervals on the front of the cross-flow blade 110, and an air outlet channel 190 extending to the cross-flow blade 110 is formed between the volute tongue 150 and the volute back plate 130; wherein the volute tongue 150 extends along the axial direction and is gap-matched with a plurality of blade bodies 170, the end of each blade body 170 is used to connect with an adjacent blade body 170, and the gap width between the middle part of each blade body 170 along the axial direction and the volute tongue 150 is greater than the gap width between the end of the blade body 170 along the axial direction and the volute tongue 150. The housing 230 has a fan cavity, the crossflow blades 110 are installed in the fan cavity, the air outlet channel 190 extends to the air outlet side of the fan cavity, and the heat exchanger 210 is arranged in the housing 230 and located at the air inlet side of the fan cavity.

[0087] In this embodiment, the air conditioner 200 can be a wall-mounted air conditioner indoor unit. The basic structure of the wall-mounted air conditioner indoor unit can refer to the relevant description in the prior art. An air inlet is provided on the shell 230, and an air inlet channel is formed on the air inlet side of the cross-flow fan blade 110. A horizontal air guide plate and left and right air guide plates for controlling the wind direction are also provided at the air outlet channel 190.

[0088] Although the present invention is disclosed as above, the present invention is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the scope defined by the claims.

Claims

1. An air outlet assembly for an air conditioner, characterized in that: include: A crossflow fan blade (110), the crossflow fan blade (110) comprising a plurality of fan blade bodies (170) sequentially spliced ​​along an axial direction; A volute back plate (130), wherein the volute back plate (130) is arranged at intervals on the back side of the crossflow fan blade (110); a volute tongue (150), the volute tongue (150) being arranged at intervals on the front side of the crossflow fan blade (110), and an air outlet channel (190) extending to the crossflow fan blade (110) being formed between the volute tongue (150) and the volute back plate (130); The volute tongue (150) extends along the axial direction and is gap-matched with a plurality of the blade bodies (170); the end of each blade body (170) is used to connect with an adjacent blade body (170); and the gap width between the middle of each blade body (170) and the volute tongue (150) is greater than the gap width between the end of the blade body (170) and the volute tongue (150).

2. The air outlet assembly of the air conditioner according to claim 1, characterized in that: Each of the wind blade bodies (170) comprises an annular end plate (171) and a plurality of blades (173); the plurality of blades (173) are mounted on one side of the annular end plate (171) and are distributed in an annular manner to form an annular blade group (175); the other side of the annular end plate (171) is used to connect adjacent annular blade groups (175); the gap width between the middle of the annular blade group (175) and the volute tongue (150) is greater than the gap width between the end of the annular blade group (175) and the volute tongue (150).

3. The air outlet assembly of the air conditioner according to claim 2, characterized in that: The side of the volute tongue (150) close to the cross-flow fan blade (110) has a plurality of spaced front end protrusions (151), the plurality of front end protrusions (151) are arranged corresponding to the ends of the plurality of annular blade groups (175), and the plurality of front end protrusions (151) divide the side of the volute tongue (150) close to the cross-flow fan blade (110) into a plurality of front end matching parts (153), the plurality of front end matching parts (153) are arranged corresponding to the middle parts of the plurality of annular blade groups (175), and the gap width S1 between the front end matching part (153) and the middle part of the annular blade group (175) is greater than the gap width S2 between the front end protrusion (151) and the end of the annular blade group (175).

4. The air outlet assembly of the air conditioner according to claim 3, characterized in that: At least one end of the front end protruding portion (151) along the axial direction has a transition arc surface (155), and the transition arc surface (155) extends to the surface of the front end matching portion (153) to ensure a smooth transition between the front end matching portion (153) and the front end protruding portion (151).

5. The air outlet assembly of the air conditioner according to claim 3, characterized in that: The gap width S1 between the front end matching portion (153) and the middle portion of the annular blade group (175) is 0.033-0.6 times the outer diameter D of the annular blade group (175); and the gap width S2 between the front end protruding portion (151) and the end portion of the annular blade group (175) is 0.02-0.033 times the outer diameter D of the annular blade group (175).

6. The air outlet assembly of the air conditioner according to claim 3, characterized in that: The width La of the front end matching portion (153) along the axial direction and the width Lb of the annular blade group (175) along the axial direction satisfy the following relationship: La≥0.7×Lb.

7. The air outlet assembly of the air conditioner according to claim 6, characterized in that: The distance Lc between the front end matching portion (153) and the adjacent annular end plate (171) in the axial direction and the width Lb of the annular blade group (175) in the axial direction satisfy the following relationship: Lc≤0.15×Lb.

8. The air outlet assembly of the air conditioner according to claim 3, characterized in that: The crossflow blade (110) is provided with disc-shaped end plates (111) at both ends along the axial direction, and the disc-shaped end plates (111) are connected to the annular blade groups (175) located at both ends, and the width Ld of the front end matching portion (153) corresponding to the middle part of at least one of the annular blade groups (175) connected to the disc-shaped end plates (111) along the axial direction is smaller than the width La of the remaining front end matching portions (153) along the axial direction.

9. The air outlet assembly of the air conditioner according to claim 8, characterized in that: The distance Le between the front end matching portion (153) corresponding to the middle part of at least one of the annular blade groups (175) connected to the disc-shaped end plate (111) and the adjacent annular end plate (171) in the axial direction is greater than the distance Lc between the remaining front end matching portions (153) and the adjacent annular end plates (171) in the axial direction.

10. An air conditioner, characterized in that: The invention comprises a heat exchanger (210), a shell (230) and an air-conditioning outlet assembly as described in any one of claims 1 to 9, wherein the shell (230) has a fan cavity, the crossflow blade (110) is installed in the fan cavity, the air outlet channel (190) extends to the air outlet side of the fan cavity, and the heat exchanger (210) is arranged in the shell (230) and is located on the air inlet side of the fan cavity.

Images