Air conditioner air outlet assembly and air conditioner

Abstract

The application 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.The cross-flow fan blade comprises a plurality of fan blade bodies which are sequentially spliced along an axial direction.The volute tongue and the volute back plate form an air outlet channel which extends to the cross-flow fan blade.The volute tongue extends along the axial direction.The end of each fan blade body is used for connecting with an adjacent fan blade body, and the gap width between the middle of each fan blade body and the volute tongue is greater than the gap width between the end of the fan blade body and the volute tongue.Compared with the prior art, the air conditioner air outlet assembly provided by the application can reduce the gap between the end of the fan blade body and the volute tongue, thereby inhibiting the backflow phenomenon at the gap, and making the airflow entering the cross-flow fan blade more stable, inhibiting the unstable condition of the circulating vortex, avoiding airflow fluctuation and reducing the air supply noise.

Description

Technical Field

[0001] This invention relates to the field of air conditioning technology, and more specifically, to an air conditioning outlet assembly and an air conditioner. Background Technology

[0002] In recent years, to improve the energy efficiency of wall-mounted air conditioner indoor units, the outer diameter of heat exchangers and cross-flow fan impellers, as well as air ducts, have been continuously increased. Furthermore, for air purification and internal cleaning purposes, equipping indoor units with high-performance filters and cleaning mechanisms has gradually become a trend. However, these structures installed in wall-mounted air conditioner indoor units increase the load resistance of the cross-flow fan impellers. Even with increased outer diameters of the cross-flow fan impellers and reduced fan speeds, the fan's airflow noise remains increasingly significant.

[0003] In a conventional wall-mounted air conditioner indoor unit, a heat exchanger is installed in the upstream air inlet duct, and a cross-flow fan is installed in the downstream air duct. A volute is mounted on the back of the cross-flow fan, and a volute tongue is mounted on the front. A horizontal air guide plate and left and right air guide plates are installed on the downstream air outlet side to control the airflow direction. Furthermore, when installing the back plate and volute tongue, a certain gap must be maintained between the cross-flow fan and its outer diameter in the axial direction, i.e., a minimum gap S.

[0004] The inventors' research revealed that cross-flow fans typically employ a modular construction, consisting of multiple spliced ​​blades. However, with the increase in the outer diameter of the cross-flow fan blades, even at reduced blade speeds, near the splicing points, due to structural changes and weakened blade guiding effect, airflow is more likely to flow back from the outlet side of the blades through the gap between the volute and the cross-flow fan blades to the inlet side. This causes localized instability in the circulating vortex generated within the cross-flow fan blades, further leading to airflow instability, resulting in airflow fluctuations and delivery noise. Summary of the Invention

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

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

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

[0008] A cross-flow fan blade, wherein the cross-flow fan blade comprises multiple fan blade bodies sequentially spliced ​​along an axial direction;

[0009] The volute back plate is spaced apart on the back of the cross-flow fan blade;

[0010] The volute tongue is spaced apart on the front of the cross-flow fan blade, and an air outlet channel extending to the cross-flow fan blade is formed between the volute tongue and the back plate of the volute casing.

[0011] The volute tongue extends along the axial direction and is in clearance fit with a plurality of the fan blades. The end of each fan blade is used to connect with an adjacent fan blade, and the gap width between the middle part of each fan blade along the axial direction and the volute tongue is greater than the gap width between the end of the fan blade along the axial direction and the volute tongue.

[0012] The air conditioning outlet assembly provided in this invention extends the volute along the axial direction and is fitted with a cross-flow fan blade formed by splicing multiple fan blades. The end of each fan blade is used to connect with an adjacent fan blade. The gap width between the middle of each fan blade along the axial direction and the volute is greater than the gap width between the end of the fan blade and the volute along the axial direction. This results in a relatively smaller gap between the end connection of the fan blade and the volute, increasing the flow resistance in the gap near the end of the fan blade. This reduces the amount of airflow passing through this gap, mitigating backflow and encouraging airflow to flow out through the outlet channel. It avoids local instability caused by the circulating flow in the cross-flow fan blade, making the gas passing through the cross-flow fan blade more stable, preventing airflow fluctuations, and reducing air supply noise. Furthermore, the wider gap between the middle of the fan blade and the volute ensures that the airflow is mainly guided by the fan blade, guaranteeing that the airflow flows into the outlet channel and ensuring normal airflow performance. Compared with the prior art, the air conditioning air outlet component provided by the present invention can reduce the gap between the air outlet and the volute tongue near the end of the fan blade body while ensuring the air outlet effect, thereby suppressing the backflow phenomenon at the gap, making the airflow entering the cross-flow fan blade more stable, suppressing the instability of the circulating vortex, avoiding airflow fluctuations, and reducing air supply noise.

[0013] Furthermore, each of the wind turbine blades includes an annular end plate and multiple blades. The multiple blades are installed on one side of the annular end plate and are arranged in a ring to form an annular blade group. The other side of the annular end plate is used to connect adjacent annular blade groups. The gap width between the middle 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.

[0014] The air conditioning outlet assembly provided in this invention uses an annular end plate to fix multiple blades, resulting in good fixation and facilitating assembly to form a cross-flow fan. Since the annular end plate is a major factor in backflow, the gap between the middle of the annular blade assembly and the volute tongue is wider than the gap between the end of the annular blade assembly and the volute tongue. This further reduces the gap width near the annular end plate, thereby minimizing the impact of the annular end plate on airflow circulation and suppressing instability in the circulating vortex.

[0015] Furthermore, the volute tongue has multiple spaced-apart front end protrusions on the side near the cross-flow fan blade. The multiple front end protrusions are correspondingly arranged with the ends of the multiple annular blade groups, and two adjacent front end protrusions divide the side of the volute tongue near the cross-flow fan blade into multiple front end mating parts. The multiple front end mating parts are correspondingly arranged with the middle of the multiple annular blade groups. The gap width S1 between the front end mating part and the middle of the annular blade group is greater than the gap width S2 between the front end protrusion and the end of the annular blade group.

[0016] The air conditioning outlet assembly provided in this invention, by setting multiple alternating front protrusions and multiple front mating parts, enables the volute tongue to have an uneven structure and increases the gap width between the front mating parts and the cross-flow fan blades. This reduces pressure fluctuations in the blades caused by close proximity, thereby suppressing rotational noise caused by pressure variations. Furthermore, the smaller gap width between the front protrusions and the cross-flow fan blades, and the fact that the front protrusions correspond to the ends of multiple annular blade groups, further suppresses backflow caused by the annular end plates at this gap. This results in a more stable airflow entering the cross-flow fan blades, suppressing the instability of circulating vortices, avoiding airflow fluctuations, and reducing air supply noise.

[0017] Furthermore, the front protrusion has transition arc surfaces at both ends along the axial direction, and the transition arc surfaces extend to the surface of the front mating part, so that the front mating part and the front protrusion smoothly transition.

[0018] The air conditioning outlet assembly provided in this embodiment of the invention features transition arc surfaces at both ends of the front protrusion. This allows for a smooth transition between the front mating part and the front protrusion, avoiding sudden changes in pressure and air resistance caused by abrupt structural changes, thereby preventing localized vortex phenomena in the airflow. Furthermore, the transition arc surfaces facilitate demolding during the molding of the front protrusion, simplifying the manufacturing process.

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

[0020] The air conditioning outlet assembly provided in this embodiment of the invention, by reasonably limiting the gap width S1 and the gap width S2, allows the middle and end parts of the annular blade assembly to be configured within a reasonable gap range, thereby reducing the rotational noise caused by pressure fluctuations while reducing the air supply noise.

[0021] Furthermore, the width La of the front end mating portion along the axial direction and the width Lb of the annular blade assembly along the axial direction satisfy the following relationship:

[0022] La≥0.7×Lb.

[0023] The air conditioning outlet assembly provided in this embodiment of the invention can, by reasonably limiting the distribution range of the front-end mating part, minimize the pressure fluctuation (pressure rise) of the blades caused by the volute tongue being too close to the blades of the fan blade body, thereby suppressing the rotational noise caused by the pressure fluctuation.

[0024] Furthermore, the distance Lc between the front end mating portion and the adjacent annular end plate in the axial direction and the width Lb of the annular blade assembly in the axial direction satisfy the following relationship:

[0025] Lc≤0.15×Lb.

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

[0027] Furthermore, the cross-flow fan 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. The width Ld of the front end mating 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 other front end mating parts along the axial direction.

[0028] Furthermore, the distance Le between the front end fitting portion corresponding to the middle portion of the annular blade assembly 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 fitting portions and the adjacent annular end plates in the axial direction.

[0029] The air conditioning air outlet assembly provided in this embodiment of the invention, by defining the volute structure at the edge position, can stabilize the airflow into the air blades at both ends of the cross-flow fan body even under low wind and quiet conditions when the edge of the fan body is close to the disc-shaped end plate, thereby suppressing the fluctuation of the circulating vortex, reducing the air supply noise of the fan blades at both ends, and thus reducing the overall noise.

[0030] In another aspect, the present invention provides an air conditioner including a heat exchanger, a housing, and an air conditioning outlet assembly as described above, the housing having a fan cavity, the cross-flow fan blades being installed in the fan cavity, the air outlet channel extending to the air outlet side of the fan cavity, and the heat exchanger being disposed in the housing and located on the air inlet side of the fan cavity. Attached Figure Description

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

[0032] Figure 2 for Figure 1 Schematic diagram of airflow conditions at point UU;

[0033] Figure 3 for Figure 1 Schematic diagram of airflow state at VV;

[0034] Figure 4 This is a schematic diagram of the air conditioning outlet assembly provided in the first embodiment of the present invention from a first perspective.

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

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

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

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

[0039] Figure 9 for Figure 7 Schematic diagram of airflow conditions in the middle;

[0040] Figure 10 This is a partial structural schematic diagram of the air conditioner air outlet assembly provided in the second embodiment of the present invention;

[0041] Figure 11 This is a schematic diagram of the structure of the air conditioner air outlet assembly provided in the third embodiment of the present invention;

[0042] Figure 12 A partial structural schematic diagram of the air conditioner outlet assembly provided in the third embodiment of the present invention;

[0043] Figure 13 This is a schematic diagram of the air conditioner air outlet assembly in another preferred embodiment of the present invention;

[0044] Figure 14 This is a schematic diagram of the structure of an air conditioner provided in the fourth embodiment of the present invention.

[0045] Explanation of reference numerals in the attached figures:

[0046] 100-Air conditioner air outlet assembly; 110-Cross-flow fan blade; 111-Disc-shaped end plate; 130-Vortex back plate; 150-Vortex tongue; 151-Front end protrusion; 153-Front end mating part; 155-Transition arc surface; 170-Fan blade body; 171-Annular end plate; 173-Blade; 175-Annular blade assembly; 190-Air outlet duct; 200-Air conditioner; 210-Heat exchanger; 230-Housing shell. Detailed Implementation

[0047] As disclosed in the background section, in existing wall-mounted air conditioner indoor units, a heat exchanger is installed in the upstream air inlet duct inside the unit, and a cross-flow fan is installed in the downstream air duct. A volute is installed on the back of the cross-flow fan, and a volute tongue is installed on the front. A horizontal air guide plate and left and right air guide plates for controlling the airflow direction are installed on the downstream air outlet side. Furthermore, when the back plate and volute tongue are installed, a certain gap, i.e., a minimum gap S, must be maintained between the cross-flow fan and its outer diameter in the axial direction.

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

[0049] Cross-flow fan blades are typically assembled from multiple blade bodies. In practice, the blade bodies are first injection molded and then ultrasonically welded together to form the cross-flow fan blade. However, in traditional wall-mounted air conditioner indoor units, if the load resistance (wind resistance) of the cross-flow fan blade increases, the overall size of the cross-flow fan blade enlarges, and its operating point shifts to the low airflow side. Consequently, the airflow velocity in the radial direction, corresponding to the outlet airflow of the blade body, decreases.

[0050] The inventor's research revealed that the design of conventional air outlet structures, such as Figure 1 As shown, due to the special structure of the volute tongue, in order to avoid rotational noise caused by increased air supply pressure, the minimum gap between the volute tongue and the cross-flow fan blades in conventional technology is kept within a certain range, and the gap width is the same at all points. This situation can easily lead to backflow at the minimum gap, causing turbulent circulation vortex, and thus resulting in defects such as unstable airflow and high air supply noise. The following is a detailed explanation. Figure 1 In the UU section, the fluid state near the volute tongue is as follows: Figure 2As shown, the airflow F1 flows out along the blade near the midpoint of its axial length within the blade body. Therefore, the velocity vector C1 of this outflowing fluid is a combination of the circumferential component C1u generated by the rotation of the impeller and the radial component C1r generated by the airflow. An outflowing airflow F1 and a circulating vortex A1 are formed in the outlet air duct formed by the volute tongue and back plate.

[0051] But in Figure 1 In the VV section, the corresponding fluid state near the volute tongue is as follows: Figure 3 As shown, near the end joint of the fan blades, structural changes, such as the plate-like joint structure itself, affect fluid flow. Furthermore, the frictional resistance generated by the sides of the plate-like structure further reduces the airflow passing between the blades. The velocity vector C2 of the outflow is synthesized from the circumferential component (velocity) C2u generated by the impeller's rotation and the radial component C2r generated by the decreasing airflow. At this point, the outflow sharply deflects towards the volute tongue at the outlet. Therefore, a portion of the airflow F2 passes through the gap between the volute tongue and the fan blades, flowing back to the inlet side between the heat exchanger and the fan blades 170. At this time, the fluid forms a jet stream when passing through the minimum gap of the volute tongue, colliding with the fluid passing through the heat exchanger and flowing into the fan blades, causing the circulating vortex A2 to become unstable.

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

[0053] To address the aforementioned problems, this invention provides a novel air conditioning outlet assembly that reduces airflow noise and stabilizes airflow. To make the above-mentioned objectives, features, and advantages of this invention more apparent and understandable, specific embodiments of the invention are described in detail below with reference to the accompanying drawings.

[0054] First Embodiment

[0055] See Figures 4 to 7 This embodiment provides an air conditioning air outlet assembly 100, which, while ensuring the air outlet effect, can make the airflow more stable, suppress the instability of the circulating vortex, avoid airflow fluctuations, and reduce air supply noise.

[0056] The air conditioning air outlet assembly 100 provided in this embodiment includes a cross-flow fan blade 110, a volute back plate 130, and a volute tongue 150. The cross-flow fan blade 110 includes a plurality of fan blades 170 sequentially spliced ​​along the axial direction. The volute back plate 130 is spaced apart on the back of the cross-flow fan blade 110. The volute tongue 150 is spaced apart on the front of the cross-flow fan blade 110. An air outlet channel 190 extending to the cross-flow fan blade 110 is formed between the volute tongue 150 and the volute back plate 130. The volute tongue 150 extends along the axial direction and is clearance-fitted with the plurality of fan blades 170. The end of each fan blade 170 is used to connect with the adjacent fan blade 170, and the gap width between the middle part of each fan blade 170 along the axial direction and the volute tongue 150 is greater than the gap width between the end of the fan blade 170 along the axial direction and the volute tongue 150.

[0057] In this embodiment, the air conditioner outlet assembly 100 is suitable for a wall-mounted air conditioner indoor unit, and the basic structure of the wall-mounted air conditioner indoor unit can be referred to the relevant description in the prior art. In this embodiment, the upper side of the cross-flow 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 cross-flow fan blade 110 are respectively clearance-fitted with the volute tongue 150 and the volute back plate 130.

[0058] It is worth noting that in this embodiment, the volute tongue 150 extends along the axial direction and is gap-fitted with the cross-flow fan blade 110 formed by splicing multiple fan blades 170. The end of each fan blade 170 is used to connect with the adjacent fan blade 170, and the gap width between the middle part of each fan blade 170 along the axial direction and the volute tongue 150 is greater than the gap width between the end of the fan blade 170 along the axial direction and the volute tongue 150. This makes the gap between the end connection of the fan blade 170 and the volute tongue 150 relatively smaller. Therefore, the flow resistance in the gap near the end of the fan blade 170 increases, which can reduce the airflow passing through the gap, slow down the backflow phenomenon, and make the airflow tend to flow out through the air outlet channel 190. This avoids the local instability of the circulating flow generated in the cross-flow fan blade 110, makes the gas passing through the cross-flow fan blade 110 more stable, avoids airflow fluctuations, and reduces air supply noise. Moreover, the gap between the middle part of the fan blade 170 and the volute tongue 150 is relatively wide. At this time, the airflow is mainly guided by the fan blade 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, thus ensuring normal air outlet effect.

[0059] Each fan blade 170 includes an annular end plate 171 and multiple blades 173. The multiple blades 173 are mounted on one side of the annular end plate 171 and arranged in a ring to form an annular blade assembly 175. The other side of the annular end plate 171 is used to connect adjacent annular blade assemblies 175. The gap width between the middle of the annular blade assembly 175 and the volute tongue 150 is greater than the gap width between the end of the annular blade assembly 175 and the volute tongue 150. Specifically, in order to improve the noise of the cross-flow fan blade 110, especially the rotational noise caused by pressure changes due to the rotation of the blades 173, the multiple blades 173 in adjacent fan blade bodies 170 are often staggered to form unequal spacing, giving them a pressure change phase. At the same time, when connecting and assembling the fan blade bodies 170, the blades 173 are offset from the center of the fan blade body 170 by a certain angle. Specifically, multiple fan blade bodies 170 can be injection molded first, and then ultrasonically welded together to form the cross-flow fan blade 110. Multiple blades 173 are fixed by the annular end plate 171, which provides good fixation and facilitates assembly and splicing to form the cross-flow fan blade 110. Since the setting of the annular end plate 171 is the main factor in the backflow phenomenon, the gap width between the middle of the annular blade assembly 175 and the volute tongue 150 is larger than the gap width between the end of the annular blade assembly 175 and the volute tongue 150. This further reduces the gap width near the annular end plate 171, thereby reducing the impact of the annular end plate 171 on airflow circulation and suppressing the instability of the circulating vortex.

[0060] It should be noted that in this embodiment, in the middle region of the annular blade assembly 175, due to the guiding effect of the blades 173 and the absence of other structural influences on the airflow, most of the airflow will flow to the outlet channel 190 under the guiding effect of the blades 173. However, at the end of the annular blades 173, the presence of an annular end plate 171 will affect the guiding effect of the blades 173. The annular end plate 171 serves as a structural support, but near the annular end plate 171, the annular end plate 171 itself will affect the airflow, and the frictional resistance generated on the side of the annular end plate 171 will further reduce the airflow passing between the blades 173, thus reducing the guiding effect of the blades 173 and causing the airflow to tend to pass through the gaps near the annular end. At this time, by reducing the width of the gap near the annular end plate 171, the flow resistance in this gap can be increased, reducing the airflow through the gap near the annular end plate 171, thereby reducing the impact of the setting of the annular end plate 171 on the airflow circulation and suppressing the instability of the circulating vortex. Therefore, at 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, in this embodiment, the middle part of the annular blade assembly 175 refers to the middle region along the axial length of the annular blade assembly 175, that is, the region where the airflow is not affected by the annular end plate 171. In this embodiment, the end of the annular blade assembly 175 refers to the region near and connected to the annular end plate 171, where the airflow is affected by the annular end plate 171. Furthermore, the axial direction in this embodiment refers to the rotation axis direction of the cross-flow fan blade 110, that is, the direction of the centerline of the rotation axis of the cross-flow fan blade 110.

[0062] In this embodiment, the volute tongue 150 has multiple spaced-apart front protrusions 151 on the side near the cross-flow fan blade 110. These protrusions correspond to the ends of multiple annular blade assemblies 175, and adjacent protrusions divide the side of the volute tongue 150 near the cross-flow fan blade 110 into multiple front-end mating portions 153. These mating portions 153 correspond to the middle portions of the annular blade assemblies 175, and the gap width S1 between the mating portion 153 and the middle portion of the annular blade assemblies 175 is greater than the gap width S2 between the protrusions 151 and the ends of the annular blade assemblies 175. Specifically, the side of the volute tongue 150 near the cross-flow fan blade 110 refers to the side of the volute tongue 150 extending towards the cross-flow fan blade 110, which faces the cross-flow fan blade 110 and engages with it with a clearance fit. By setting multiple alternating front protrusions 151 and multiple front mating parts 153, the volute tongue 150 can have an uneven overall structure, and the gap between the front mating part 153 and the cross-flow fan blade 110 can be larger, improving the pressure fluctuation of the blade 173 caused by being too close to it, thereby suppressing the rotational noise caused by pressure fluctuation. Furthermore, the gap between the front protrusion 151 and the cross-flow fan blade 110 is smaller, and the front protrusion 151 corresponds to the ends of multiple annular blade groups 175, which can further suppress the backflow phenomenon caused by the annular end plate 171 at this gap. This makes the airflow entering the cross-flow fan blade 110 more stable, suppresses the instability of the circulating vortex, avoids airflow fluctuations, and reduces air supply noise.

[0063] In this embodiment, at least one end of the front protrusion 151 along the axial direction has a transition arc surface 155, which extends to the surface of the front mating part 153, so that the front mating part 153 and the front protrusion 151 transition smoothly. Specifically, both ends of the front protrusion 151 located in the middle region of the volute tongue 150 have transition arc surfaces 155, so as to smoothly transition with the front mating parts 153 on both sides. One end of the front 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 duct 190. By providing transition arc surfaces 155 at both ends of the front protrusion 151, this embodiment can make the transition between the front mating part 153 and the front protrusion 151 smooth, avoiding sudden changes in pressure and wind resistance caused by local structural changes, thereby avoiding local vortex phenomena in the airflow. At the same time, by providing transition arc surfaces 155, demolding can be made more convenient when molding the front protrusion 151, which is convenient for manufacturing.

[0064] Furthermore, the gap width S1 between the front end mating part 153 and the middle part of the annular blade assembly 175 is 0.033-0.6 times the outer diameter D of the annular blade assembly 175; the gap width S2 between the front end protrusion 151 and the end of the annular blade assembly 175 is 0.02-0.033 times the outer diameter D of the annular blade assembly 175. Preferably, the gap width S1 between the front end mating part 153 and the middle part of the annular blade assembly 175 is 0.035 times the outer diameter D of the annular blade assembly 175, and the gap width S2 between the front end protrusion 151 and the end of the annular blade assembly 175 is 0.03 times the outer diameter D of the annular blade assembly 175. By reasonably limiting the gap widths S1 and S2, the middle and end parts of the annular blade assembly 175 can be configured within a reasonable gap range, thereby reducing rotational noise caused by pressure fluctuations and reducing air supply noise.

[0065] In this embodiment, in conjunction with the reference Figure 8 Even near the annular end plate 171 of the fan blade body 170, the airflow exiting the fan blade body 170 is sharply deflected towards the volute tongue 150 at the outlet position. Because the minimum gap between the volute tongue 150 and the annular blade assembly 175 is small, the flow resistance within this gap is significant. A portion of the outlet fluid cannot pass through the gap S2 between the front protrusion 151 and the end of the annular blade assembly 175, and instead flows into the outlet passage 190. Therefore, near the annular end plate 171 of the fan blade body 170, the fluid flowing into the fan blade body 170 is stabilized, and local instability of the circulating vortex is suppressed. Furthermore, see also... Figure 9Near the midpoint of the axial length of the annular blade assembly 175 of the fan blade body 170, the airflow exiting the fan blade body 170 flows along the blade 173. Therefore, even at the minimum clearance S1 position, the fluid flows out through the outlet flow channel. Consequently, the circulating vortex generated in the cross-flow fan blade 110 with its enlarged outer diameter does not produce local instability, thus stabilizing the airflow through the cross-flow fan blade 110 and improving the air supply noise.

[0066] In summary, the air conditioning outlet assembly 100 provided in this embodiment extends the volute 150 along the axial direction and is fitted with a cross-flow fan blade 110 formed by splicing multiple fan blades 170. The end of each fan blade 170 is used to connect with the adjacent fan blade 170, and the gap width between the middle part of each fan blade 170 along the axial direction and the volute 150 is greater than the gap width between the end of the fan blade 170 along the axial direction and the volute 150. This makes the gap between the end connection of the fan blade 170 and the volute 150 relatively smaller. Therefore, the flow resistance in the gap near the end of the fan blade 170 increases, which can reduce the airflow passing through the gap, slow down the backflow phenomenon, and make the airflow tend to flow out through the air outlet channel 190. This avoids the local instability of the circulating flow generated in the cross-flow fan blade 110, makes the gas passing through the cross-flow fan blade 110 more stable, avoids airflow fluctuations, and reduces air supply noise. Furthermore, the gap between the middle part of the fan blade 170 and the volute tongue 150 is relatively wide. At this time, the airflow is mainly guided by the fan blade 170, which can ensure that the airflow flows into the air outlet channel 190 and ensure normal air outlet effect. Compared with the prior art, the air conditioning air outlet assembly 100 provided in this embodiment can reduce the gap between the fan blade 170 and the volute tongue 150 near the end of the fan blade 170 while ensuring the air outlet effect. This suppresses the backflow phenomenon at the gap, thereby making the airflow entering the cross-flow 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 Figure 10 This embodiment provides an air conditioning outlet component 100, whose basic structure, principle and technical effects are the same as those of the first embodiment. For the sake of brevity, any parts not mentioned in this embodiment can be referred to the corresponding content in the first embodiment.

[0069] In this embodiment, the width La of the front end mating 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 Lb. By reasonably limiting the distribution range of the front end mating part 153, the pressure variation (pressure rise) of the blade 173 caused by the volute tongue 150 being too close to the blade 173 of the wind turbine body 170 can be reduced as much as possible, thereby suppressing the rotational noise caused by the pressure variation.

[0072] Furthermore, the distance Lc between the front end mating part 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 Lb, and the sum of Lc and Lb constitutes the air conditioner outlet assembly 100 provided in this embodiment of the invention. By reasonably limiting the distribution range of the front protrusion 151 and reasonably matching it with the distribution range of the front mating part 153, it is possible to suppress the rotational noise caused by pressure changes while ensuring the suppression of backflow phenomenon at 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, airflow fluctuations are avoided, and the air supply noise is reduced.

[0075] Third Embodiment

[0076] This embodiment provides an air conditioning outlet assembly 100, whose basic structure, principle, and technical effects are the same as those of the first or second embodiment. For the sake of brevity, any parts not mentioned in this embodiment can be referred to the corresponding content in the first or second embodiment.

[0077] See Figure 11 and Figure 12 In this embodiment, the cross-flow fan blade 110 has disc-shaped end plates 111 at both ends along the axial direction. The end plates are connected to the annular blade groups 175 located at both ends. The width Ld of the front end fitting 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 fitting portions 153 along the axial direction. Specifically, the width Ld of the front end fitting portions 153 corresponding to the middle part of the two annular blade groups 175 connected to the disc-shaped end plate 111 along the axial direction is smaller than the width La of the other front end fitting portions 153 along the axial direction. That is, the width of the front end fitting portions 153 corresponding to the annular blade groups 175 located at the beginning and end ends is smaller, Ld < La.

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

[0079] It should be noted that in this embodiment, the volute tongue 150 structures corresponding to the regions of the annular blade groups 175 at both ends are identical. That is, in the regions corresponding to the annular blade groups 175 at both ends, the width of the front end mating portion 153 is Ld, and Ld is smaller than the width La of the front end mating portion 153 in the regions corresponding to the remaining annular blade groups 175. Simultaneously, in the regions corresponding to the annular blade groups 175 at both ends, the distance in the axial direction between the front end mating portion 153 and the adjacent annular end plate 171 is Le, and Le is greater than the distance in the axial direction between the front end mating 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 disc-shaped end plate 111 and the adjacent front end mating part 153 in this embodiment is also Le, that is, the distance between the disc-shaped end plate 111 and the adjacent front end mating part 153 is equal to the distance between the front end mating part 153 and the adjacent annular end plate 171.

[0081] In other preferred embodiments of the present invention, such as Figure 13 As shown, the width Ld of the front-end mating 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 mating portions 153 along the axial direction. That is, the width of the front-end mating portion 153 corresponding to the annular blade group 175 located at the beginning or end is smaller. At the same time, the distance Lc between the front-end mating 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 mating portions 153 and the adjacent annular end plate 171 in the axial direction. That is, the distance between the front-end mating portion 153 corresponding to the annular blade group 175 located at the beginning or end and the adjacent annular end plate 171 is larger.

[0082] By defining the above structure, in addition to achieving the technical effects of the first or second embodiment, under low-wind quiet conditions with a small airflow through the cross-flow fan blade 110, even under the influence of the side of the air outlet channel 190, the airflow at both ends of the cross-flow fan blade 110 decreases significantly. The airflow at the outlet position deflects sharply from near the annular end plate 171 toward the axial center of the fan blade 170 toward the volute tongue 150, and the deflection range is larger than that of other fan blades 170 except for the two ends. Since the minimum gap between the volute tongue 150 and the end of the fan blade 170 is very small, the resistance of the fluid passing through this gap is large. A portion of the airflow cannot pass through the gap S2 between the front protrusion 151 and the end of the annular blade assembly 175, and instead flows toward the air outlet channel 190. Therefore, even under low-wind quiet conditions with a small airflow, the airflow flowing into the fan blades 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 defines the volute tongue 150 structure at the edge position. When the edge of the fan blade 170 is close to the disc-shaped end plate 111, even under low wind and quiet conditions with low air volume, the airflow into the fan blades 170 at both ends of the cross-flow fan blade 110 can be stabilized, thereby suppressing the fluctuation of the circulating vortex, reducing the air supply noise of the fan blades 170 at both ends, and thus reducing the overall noise.

[0084] Fourth embodiment

[0085] See Figure 14 This embodiment provides an air conditioner 200, including a heat exchanger 210, a housing 230, and an air conditioning air outlet assembly 100. The basic structure, principle, and technical effects of the air conditioning air outlet assembly 100 are the same as those of the first embodiment, the second embodiment, or the third embodiment. For the sake of brevity, any parts not mentioned in this embodiment can be referred to the corresponding content 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 housing 230, and an air conditioning outlet assembly 100. The air conditioning outlet assembly 100 includes a cross-flow fan blade 110, a volute back plate 130, and a volute tongue 150. The cross-flow fan blade 110 includes a plurality of fan blades 170 sequentially spliced ​​along the axial direction. The volute back plate 130 is spaced apart on the back of the cross-flow fan blade 110. The volute tongue 150 is spaced apart on the front of the cross-flow fan blade 110. An air outlet channel 190 extending to the cross-flow fan blade 110 is formed between the volute tongue 150 and the volute back plate 130. The volute tongue 150 extends along the axial direction and is clearance-fitted with the plurality of fan blades 170. The end of each fan blade 170 is used to connect with the adjacent fan blade 170, and the gap width between the middle part of each fan blade 170 along the axial direction and the volute tongue 150 is greater than the gap width between the end of the fan blade 170 along the axial direction and the volute tongue 150. The housing 230 has a fan cavity, a cross-flow fan blade 110 is installed in the fan cavity, an air outlet duct 190 extends to the air outlet side of the fan cavity, and a heat exchanger 210 is disposed in the housing 230 and located on 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 be referred to the relevant description in the prior art. An air inlet is provided on the housing 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 air direction are also provided at the air outlet channel 190.

[0088] While the present invention has been disclosed above, it is not limited thereto. Any person skilled in the art can make various modifications and alterations without departing from the spirit and scope of the invention; therefore, the scope of protection of the present invention should be determined by the scope defined in the claims.

Claims

1. An air conditioning outlet assembly, characterized in that, include: A cross-flow fan blade (110) comprises multiple fan blade bodies (170) sequentially spliced ​​along the axial direction. A volute back plate (130) is provided at intervals on the back of the cross-flow fan blade (110); The volute tongue (150) is spaced apart on the front of the cross-flow fan blade (110), and an air outlet channel (190) extending to the cross-flow fan blade (110) is formed between the volute tongue (150) and the volute back plate (130). The volute tongue (150) extends along the axial direction and is in clearance fit with a plurality of fan blades (170). The end of each fan blade (170) is used to connect with the adjacent fan blade (170), and the gap width between the middle of each fan blade (170) and the volute tongue (150) is greater than the gap width between the end of the fan blade (170) and the volute tongue (150). Each of the blades (170) includes an annular end plate (171) and a plurality of blades (173), wherein the plurality of blades (173) are mounted on one side of the annular end plate (171) and are arranged in a ring to form an annular blade group (175). The volute tongue (150) has multiple spaced-apart front end protrusions (151) on the side near the cross-flow fan blade (110). The multiple front end protrusions (151) are correspondingly arranged with the ends of the multiple annular blade groups (175), and the multiple front end protrusions (151) divide the side of the volute tongue (150) near the cross-flow fan blade (110) into multiple front end mating parts (153). The multiple front end mating parts (153) correspond to the middle of the multiple annular blade groups (175). The cross-flow fan blade (110) is provided with disc-shaped end plates (111) at both ends along the axial direction. The disc-shaped end plates (111) are connected to the annular blade groups (175) located at both ends. The width Ld of the front end fitting part (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 other front end fitting parts (153) along the axial direction, so as to suppress the fluctuation of the circulating vortex. The front protrusion (151) has a transition arc surface (155) at at least one end along the axial direction, the transition arc surface (155) extending to the surface of the front mating part (153) so that the front mating part (153) and the front protrusion (151) transition smoothly.

2. The air conditioning outlet assembly according to claim 1, characterized in that, The other side of the annular end plate (171) is used to connect the adjacent annular blade group (175), and 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).

3. The air conditioning outlet assembly according to claim 2, characterized in that, The gap width S1 between the front end mating 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 conditioning outlet assembly according to claim 3, characterized in that, The gap width S1 between the front end mating part (153) and the middle part of the annular blade group (175) is 0.033-0.6 times the outer diameter D of the annular blade group (175); the gap width S2 between the front end protrusion (151) and the end of the annular blade group (175) is 0.02-0.033 times the outer diameter D of the annular blade group (175).

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

6. The air conditioning outlet assembly according to claim 5, characterized in that, The distance Lc between the front end mating part (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: Lc≤0.15×Lb.

7. The air conditioning outlet assembly according to claim 1, characterized in that, The distance Le between the front end fitting portion (153) corresponding to the middle portion of the annular blade assembly (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 fitting portions (153) and the adjacent annular end plates (171) in the axial direction.

8. An air conditioner, characterized in that, The device includes a heat exchanger (210), a housing (230), and an air conditioning outlet assembly as described in any one of claims 1-7, wherein the housing (230) has a fan cavity, the cross-flow fan blade (110) is installed in the fan cavity, the outlet duct (190) extends to the outlet side of the fan cavity, and the heat exchanger (210) is disposed in the housing (230) and located on the inlet side of the fan cavity.

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