Volute tongue and volute molded line structure of indoor unit of air conditioner and air conditioner

Abstract

The invention discloses a volute tongue and volute molded line structure of an air conditioner indoor unit. The volute tongue and volute molded line structure comprises a shell. A volute tongue and a volute are arranged in the shell, and a gap is reserved between the volute tongue and the volute to define an air outlet. A plurality of first flow guide ribs are distributed on the volute tongue in the length direction of the volute tongue according to the sine and cosine law and used for integrating airflow flowing through the air outlet. A plurality of second flow guide ribs are distributed on the volute in the length direction of the volute according to the sine and cosine law and used for integrating airflow flowing through the air outlet. The first flow guide ribs with the length and the height distributed according to the sine and cosine rule are arranged on the first windward side and the first air guide face of the volute tongue respectively, the second flow guide ribs with the height and the extension length distributed according to the sine and cosine rule are arranged on the second air guide face of the volute, and therefore the flow guide ribs are distributed in a non-uniform and ordered mode. The non-uniformity periodicity of wake airflow of the cross-flow fan can be broken through, the impact force of the airflow on the volute tongue and the volute can be dispersed, and generation of sharp noise is inhibited from the source.

Description

Technical Field

[0001] This invention relates to the field of air conditioner indoor unit structural design technology, specifically to an air conditioner indoor unit volute tongue and volute shell profile structure and an air conditioner. Background Technology

[0002] Noise, as a key indicator affecting user experience during air conditioner operation, has become one of the core concerns in industry competition.

[0003] Research has shown that during air conditioner operation, the pressurized airflow inside the cross-flow fan flows towards the air outlet under the guidance of the volute and volute tongue profiles. Therefore, the profile design of the volute and volute tongue directly affects the airflow state, thus significantly impacting noise. Existing air conditioner volute tongue structures typically include a volute tongue body. The side of the volute tongue body facing the center of the volute is the first air guide surface. Multiple guide ribs are spaced along the length of the volute tongue, and these ribs are parallel to the cross-section of the volute tongue. The guide grooves between the guide ribs are also parallel to the cross-section of the volute tongue. The corresponding volute structure includes a volute shell body, with the air inlet end and the inner surface facing the volute tongue forming a smooth first air guide surface.

[0004] The noise reduction effect of this traditional structure is limited: when the cross-flow fan rotates at high speeds, the fan blades create a wake region, resulting in significant non-uniformity in airflow speed and pressure. This non-uniform airflow periodically acts on the surface of the volute tongue and volute shell, generating strong pulsating forces in the surrounding area, which in turn causes sharp noise and severely reduces the user experience. Summary of the Invention

[0005] To address the shortcomings of existing technologies, the present invention aims to provide an air conditioner indoor unit volute tongue and volute shell profile structure and air conditioner, thereby solving the problem that the parallel guide ribs of the volute tongue and the smooth first guide surface of the volute shell cannot break the periodicity of the uneven airflow in the wake of the cross-flow fan, resulting in airflow pulsation impact and sharp noise.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a volute tongue and volute shell profile structure for an air conditioner indoor unit, comprising a housing; a volute tongue and a volute shell are provided inside the housing, with a gap reserved between the volute tongue and the volute shell to enclose and form an air outlet;

[0007] The volute tongue has multiple first guide ribs distributed along its length in a sine and cosine pattern. These first guide ribs are used to integrate the airflow passing through the air outlet.

[0008] The volute has multiple second guide ribs distributed along its length in a sine and cosine pattern. These second guide ribs are used to integrate the airflow passing through the air outlet.

[0009] Preferably, the volute tongue includes a first windward surface and a first air guide surface that is smoothly bent and connected to the first windward surface; multiple first air guide ribs are evenly distributed on the first windward surface at intervals, and the ends of the multiple first air guide ribs extend to the first air guide surface.

[0010] Preferably, multiple first guide ribs are arranged at intervals along their length on the first windward surface, and the length dimensions of one end of the multiple first guide ribs on the first windward surface are distributed in a sine and cosine pattern, wherein a guide groove for airflow is formed between any two adjacent groups of first guide ribs.

[0011] Preferably, the height of the multiple first guide ribs located on the first guide surface is distributed in a sine and cosine pattern along the length of the first guide surface.

[0012] Preferably, the top width of the first guide rib is c, and the bottom width is d; the top gap between two adjacent first guide ribs is a, and the bottom gap is b; the value range of each parameter satisfies:

[0013] 2mm≤a≤5mm;

[0014] 1mm≤b≤4mm;

[0015] 0mm≤c≤2mm;

[0016] 1mm≤d≤3mm.

[0017] Preferably, the side of the volute facing the volute tongue is the second air guide surface, and multiple second air guide ribs are evenly distributed on the second air guide surface at intervals. An arc-shaped groove for airflow is formed between any two adjacent sets of second air guide ribs.

[0018] Preferably, the height of the multiple second guide ribs located on the second guide surface is distributed in a sine and cosine pattern along the length of the second guide surface.

[0019] Preferably, each end of the plurality of second guide ribs extends toward both sides of the second air guide surface, and the extension length of each second guide rib is distributed in a sine and cosine pattern along the length direction of the second air guide surface.

[0020] Preferably, the bottom gap of the arc-shaped groove is b', the top gap of the arc-shaped groove is c', and the gap between two adjacent arc-shaped grooves is a'. The values ​​of each parameter satisfy the following range:

[0021] 2mm≤a'≤5mm;

[0022] 1mm≤b'≤3mm;

[0023] 1mm≤c'≤2mm.

[0024] On the other hand, according to embodiments of the present invention, the present invention also provides an air conditioner including an air conditioning indoor unit volute tongue and volute profile structure.

[0025] Compared with the prior art, the present invention has the following beneficial effects: By setting first guide ribs with length and height distributed in a sine and cosine law on the first windward surface and the first air guiding surface of the volute tongue, and setting second guide ribs with height and extension length distributed in a sine and cosine law on the second air guiding surface of the volute, the guide ribs form a non-uniform but orderly distribution pattern, which can break the non-uniformity and periodicity of the airflow in the wake of the cross-flow fan, disperse the impact force of the airflow on the volute tongue and volute, weaken the intensity of the pulsating force, and suppress the generation of sharp noise from the root; the guide ribs on the first windward surface initially sort out the airflow, the guide ribs on the first air guiding surface further optimize the airflow direction, and the guide ribs on the volute are integrated to effectively improve the uniformity of airflow speed and pressure, improve the stability of the airflow, and at the same time reduce the friction noise between the airflow and the structure.

[0026] By limiting the range of parameters such as the gap and width of the guide ribs, the structural strength of the guide ribs is ensured while taking into account the airflow efficiency, thus avoiding the problem of increased airflow resistance caused by the design of the guide ribs. Furthermore, the phase difference design between the guide ribs further avoids the superposition of airflow pulsations, resulting in a more significant noise reduction effect. Attached Figure Description

[0027] Figure 1 This is a three-dimensional structural diagram of an embodiment of the present invention.

[0028] Figure 2 This is a three-dimensional structural diagram of the cochlear tongue in an embodiment of the present invention.

[0029] Figure 3 This is a front view of the cochlear tongue in an embodiment of the present invention.

[0030] Figure 4 for Figure 3 A magnified view of region A in the middle.

[0031] Figure 5 This is a cross-sectional view of an embodiment of the present invention.

[0032] Figure 6 for Figure 5 A magnified view of region B in the middle.

[0033] Figure 7 This is a three-dimensional structural diagram of the volute in an embodiment of the present invention.

[0034] Figure 8 This is a front view of the volute in an embodiment of the present invention.

[0035] Figure 9 for Figure 8 A magnified view of region C in the middle.

[0036] Figure 10 This is a three-dimensional structural diagram of the button in an embodiment of the present invention.

[0037] The reference numerals in the accompanying drawings include:

[0038] 10. Shell;

[0039] 20. Volute tongue; 21. First windward surface; 22. First guide rib; 23. Guide groove; 24. First air guide surface;

[0040] 30. Volute; 31. Second air guide surface; 32. Second air guide rib; 33. Arc-shaped groove;

[0041] 40. Air vent. Detailed Implementation

[0042] The technical solutions of the present invention will be further described below with reference to the accompanying drawings and embodiments.

[0043] like Figures 1 to 5 As shown in the figure, the present invention proposes a volute tongue and volute shell profile structure for an air conditioner indoor unit, which includes a housing 10; a volute tongue 20 and a volute shell 30 are provided inside the housing 10, and a gap is reserved between the volute tongue 20 and the volute shell 30 to enclose and form an air outlet 40.

[0044] The volute tongue 20 has multiple first guide ribs 22 distributed along its length in a sine and cosine pattern. The multiple first guide ribs 22 are used to integrate the airflow passing through the air outlet 40.

[0045] The volute 30 has multiple second guide ribs 32 distributed along its length in a sine and cosine pattern. These second guide ribs 32 are used to integrate the airflow passing through the air outlet 40.

[0046] By setting the first guide rib 22 and the second guide rib 32 with a sine and cosine regular distribution on the volute tongue 20 and the volute 30 respectively, the defects of the non-uniform velocity / pressure of the airflow in the wake of the cross-flow fan and the periodic pulsation impact can be corrected. The sine and cosine distributed guide ribs form a non-uniform but orderly airflow path, which can break the fixed period of airflow pulsation and avoid structural vibration noise caused by the superposition of pulsation forces.

[0047] The guide ribs of the volute tongue 20 and the volute shell 30 form a "synergistic air guiding" structure, which classifies and sorts the airflow passing through the air outlet 40, guiding the airflow out smoothly and avoiding the generation of local eddies, thus ensuring the air outlet efficiency of the air conditioner for cooling / heating. The guide ribs with sine and cosine distribution can disperse the impact force of the airflow on the surface of the volute tongue 20 and the volute shell 30, weaken the intensity of periodic pulsation force, suppress the generation of sharp peak noise from the source, and reduce the friction noise between the airflow and the structure.

[0048] like Figure 2As shown, the volute tongue 20 includes a first windward surface 21 and a first air guide surface 24 that is smoothly connected to the first windward surface 21 by bending; multiple first air guide ribs 22 are evenly distributed on the first windward surface 21 at intervals, and the ends of the multiple first air guide ribs 22 extend to the first air guide surface 24.

[0049] Multiple first guide ribs 22 are evenly distributed at intervals on the first windward surface 21, and their ends extend to the first air guide surface 24, forming a graded airflow path that is initially sorted on the windward surface and precisely guided by the first air guide surface 24. This cross-surface extension design can control the airflow throughout the entire process, avoid airflow turbulence in the transition area between the two surfaces, and improve the uniformity of airflow. The evenly distributed design of the guide ribs not only retains the function of diverting airflow and weakening the pulsating force of the fan wake, but also further optimizes the airflow direction through the structure extending to the first air guide surface 24, forming a synergistic effect with the second guide ribs 32 of the subsequent volute 30.

[0050] like Figure 2 As shown, multiple first guide ribs 22 are arranged at intervals along their length on the first windward surface 21, and the length dimensions of one end of the multiple first guide ribs 22 on the first windward surface 21 are distributed in a sine and cosine pattern. A guide groove 23 for airflow is formed between any two adjacent groups of first guide ribs 22.

[0051] Multiple first guide ribs 22 are arranged at intervals on the first windward surface 21, and their end length dimensions follow the... The length is distributed according to a sine and cosine law, rather than the traditional uniform length design. This periodic fluctuation in length can break the uniform impact rhythm of the cross-flow fan's wake airflow, disperse the pulsating force of the airflow on the surface of the volute tongue 20, and avoid the generation of fixed-frequency vibration noise. The range of values ​​for each parameter in the formula (10≤ ≤15, π / 50≤ω1≤π / 10, 0≤φ1≤2π, 10≤ ≤15) It balances structural strength and airflow guidance:

[0052] A1 (amplitude) and B1 (reference length) are limited to the range of 10 to 15 to ensure that the guide ribs have sufficient length to guide the airflow, while avoiding excessive length that would increase the air outlet resistance;

[0053] The value of ω1 (angular frequency) determines the period of length fluctuation. The range of π / 50 to π / 10 can be adapted to the volute length of different air conditioner specifications, so as to achieve the matching of fluctuation period and volute size.

[0054] The adjustability of φ1 (initial phase) allows for adjustment of the initial fluctuation state of the guide rib length according to actual noise reduction requirements, thereby improving the adaptability of the solution.

[0055] The guide groove 23 formed between adjacent guide ribs, together with the guide ribs with fluctuating length, forms an airflow channel with periodically changing width and depth, which can further disperse the non-uniformity of airflow speed, guide the airflow to flow smoothly towards the first guide surface 24, and reduce eddies and friction noise.

[0056] like Figure 2 As shown, the height dimensions of the multiple first guide ribs 22 located on the first guide surface 24 are distributed in a sine and cosine pattern along the length of the first guide surface 24.

[0057] The first air guide surface 24 is the key path for airflow to the air outlet 40. The height of the first guide rib 22 is along the length of the first air guide surface 24. Regular fluctuations, this highly periodic change, can provide secondary and refined guidance to the airflow that has been initially sorted by the first windward surface 21, breaking the laminar inertia of the airflow on the first windward surface 24, avoiding local airflow accumulation or sudden changes in flow velocity, and allowing the airflow to enter the air outlet 40 in a more stable state.

[0058] The range of values ​​for each parameter in the formula (1≤ ≤5,π / 50≤ω2≤π / 10,0≤φ2≤2π,1≤ ≤5) Functional positioning for adapting to the first air guide surface 24:

[0059] A2 (amplitude) and B2 (reference height) are limited to the range of 1 to 5, which ensures that the guide ribs have sufficient air guiding height to constrain the airflow, while avoiding the increase of air outlet resistance due to excessive height, or the loss of air guiding function due to excessive height.

[0060] The angular frequency ω2 is consistent with the angular frequency range of the length of the first windward surface 21 guide rib, which can achieve coordinated matching between the fluctuation of the windward surface length and the fluctuation of the height of the first windward surface 24, and enhance the continuity of airflow control.

[0061] The adjustability of φ2 (initial phase) can be achieved by adjusting the starting phase of the height fluctuation, avoiding complete synchronization with the fluctuation period of the windward guide rib, further breaking up the periodicity of the airflow pulsation and improving the noise reduction effect.

[0062] The height of the guide ribs on the first air guide surface 24 is distributed in a sine and cosine manner, which together with the length of the guide ribs on the first windward surface 21 forms a two-dimensional fluctuation design of length and height. Combined with the guide grooves 23 between adjacent guide ribs, a non-uniform air guide channel is constructed throughout the entire path, which weakens the pulsating force caused by the wake of the cross-flow fan from the source, while ensuring air output efficiency.

[0063] The distribution of each set of guide ribs satisfies ω1=ω2, and the points corresponding to the maximum values ​​of y1 and y2 are consistent in the extension direction of the volute tongue 20 body.

[0064] The angular frequency ω determines the fluctuation period of the sine and cosine distribution. ω1=ω2 means that the fluctuation period of the length of the guide rib on the first windward surface 21 is exactly the same as the fluctuation period of the height of the guide rib on the first windward surface 24. This design allows the airflow to experience synchronous and periodic changes in the guiding constraints throughout its flow through the volute tongue 20, avoiding turbulence in the transition area between the windward surface and the first windward surface 24 due to misalignment of the fluctuation periods of the two guide structures, thus ensuring the continuity of airflow control.

[0065] In the extension direction of the volute tongue 20, the alignment of points y1 (maximum length) and y2 (maximum height) means that at the same axial position, the guide rib has both the longest extension length and the highest protrusion height. This position can form a strongly constrained guide node, which has the strongest guiding effect on airflow; while the point corresponding to the minimum values ​​of y1 and y2 forms a weakly constrained guide node, with less airflow resistance. This precise correspondence between "strong and weak constrained nodes" can more effectively disperse the airflow inhomogeneity of the cross-flow fan wake, weaken periodic pulsation, and improve noise reduction.

[0066] like Figure 4 As shown, the top width of the first guide rib 22 is c, and the bottom width is d; the top gap between two adjacent first guide ribs 22 is a, and the bottom gap is b; the value range of each parameter satisfies:

[0067] 2mm≤a≤5mm;

[0068] 1mm≤b≤4mm;

[0069] 0mm≤c≤2mm;

[0070] 1mm≤d≤3mm.

[0071] The bottom width d is limited to 1mm≤d≤3mm, which is greater than the top width c (0mm≤c≤2mm), so that the first guide rib 22 forms a trapezoidal cross-section that is narrower at the top and wider at the bottom. This structure can enhance the connection strength between the guide rib and the windward surface of the volute tongue 20 and the first air guiding surface 24, and prevent the guide rib from deforming or falling off due to long-term airflow impact. The top width c can be as low as 0mm (i.e., pointed top design) and not more than 2mm. This can reduce the frontal resistance of the guide rib to the airflow, and can also accurately divert the airflow through the pointed top, weakening the intensity of airflow pulsation.

[0072] The top gap 'a' is 2mm ≤ a ≤ 5mm, which is larger than the bottom gap 'b' (1mm ≤ b ≤ 4mm), forming a guide channel 23 that is wider at the top and narrower at the bottom when combined with the trapezoidal cross-section. This design guides the airflow smoothly within the guide channel 23, preventing the formation of eddies and ensuring sufficient airflow area to prevent increased airflow resistance due to excessively small gaps. The range of gap parameters covers the size requirements of the volute 20 for different air conditioner specifications and can be flexibly adjusted according to the actual product's airflow and noise reduction goals, improving the adaptability of the solution.

[0073] like Figure 5 As shown, the side of the volute 30 facing the volute tongue 20 is the second air guide surface 31, and multiple second air guide ribs 32 are evenly distributed on the second air guide surface 31 at intervals. An arc-shaped groove 33 for airflow is formed between any two adjacent sets of second air guide ribs 32.

[0074] The second air guide surface 31 is the core airflow contact surface of the volute 30 facing the volute tongue 20 and the air outlet 40. Multiple second air guide ribs 32 are evenly distributed on this surface, forming a bilateral symmetrical constraint with the air guide rib layout of the first windward surface 21 of the volute tongue 20. This allows the airflow to be guided bidirectionally in the gap channel between the volute tongue 20 and the volute 30, avoiding airflow deviation or turbulence caused by unilateral airflow and ensuring the uniformity of the air outlet.

[0075] like Figure 2 As shown, the height dimensions of the multiple second guide ribs 32 located on the second guide surface 31 are distributed in a sine and cosine pattern along the length of the second guide surface 31.

[0076] The height of the second guide rib 32 is along the length of the second air guide surface 31. Regular fluctuations, where 0≤A3≤3, π / 50≤ω3≤π / 10, 0≤φ3≤2π, 0≤ ≤3; Unlike the rigid constraint of traditional guide ribs with equal height. This periodic change in height can complement the fluctuation of the length and height of the guide ribs on the side of the volute tongue 20, break the pulsation cycle of the airflow in the gap channel between the volute tongue 20 and the volute shell 30, avoid the resonance noise caused by the superposition of airflow pulsations, and guide the airflow to form a more uniform velocity distribution.

[0077] Amplitude A3 and reference height B3: The value range is 0≤A3≤3 and 0≤B3≤3. The overall height is controlled in a low range to ensure that the guide rib has sufficient air guiding capacity and to avoid the increase of air outlet resistance due to excessive height, which is suitable for the low pressure loss design requirements of the 40 air outlet of the air conditioner.

[0078] The angular frequency ω3: π / 50≤ω3≤π / 10 is consistent with the angular frequency range of the guide ribs on the side of the volute tongue 20, which can achieve the matching of the fluctuation period of the guide ribs on both sides of the volute tongue 20 and the volute shell 30, ensuring that the airflow is continuously controlled in the entire channel and avoiding airflow turbulence caused by period misalignment.

[0079] The initial phase φ3 has an adjustable range of 0≤φ3≤2π, which supports adjusting the initial state of height fluctuation according to actual noise reduction needs. The airflow dispersion effect can be further optimized by setting the phase difference with the guide rib on the side of the volute tongue 20.

[0080] like Figure 1 As shown, each end of the multiple second guide ribs 32 extends toward both sides of the second air guide surface 31, and the extension length of each second guide rib 32 is distributed in a sine and cosine pattern along the length direction of the second air guide surface 31.

[0081] The detailed working process of this embodiment is as follows: the end of the second guide rib 32 extends toward both sides of the second air guide surface 31, and the extension length is as follows: Regular periodic changes, where 0≤ ≤100, π / 50≤ ≤π / 10, 0≤ ≤2π, 0≤ ≤100, unlike the uniform length extension design of traditional guide ribs. This length fluctuation allows the guide ribs to form an uneven but orderly airflow guiding area on the second airflow guiding surface 31, which can break the boundary layer pulsation pattern of airflow on both sides of the windward side and avoid the formation of fixed frequency vortex noise in the edge area; at the same time, the change in extension length can adapt to the airflow velocity difference at different positions, and achieve precise guidance of edge airflow.

[0082] Amplitude A4 and reference length B4: The range of values ​​is widened to 0≤A4≤100 and 0≤B4≤100, which can be adapted to the length of different specifications of air conditioner volute 30 (from small wall-mounted air conditioners to large cabinet air conditioners). It can achieve local fine air guidance through small parameters, and can also meet the full range airflow control of long volute 30 through large parameters.

[0083] The angular frequency ω4: π / 50≤ω4≤π / 10 is consistent with the angular frequency range of the guide ribs on the volute tongue 20 side and the volute shell 30 side, ensuring the oscillation period coordination of the guide ribs of the whole structure and avoiding the turbulent superposition of airflow in the gap between volute tongue 20 and volute shell 30 due to period misalignment.

[0084] The adjustable initial phase φ4: 0≤φ4≤2π allows for further enhancement of the airflow dispersion effect by setting the phase difference with the height fluctuation of the guide rib. For example, the maximum height can correspond to the minimum extension length, forming a complementary airflow node with strong constraint and weak coverage.

[0085] Each set of guide channels 23 is distributed to satisfy ω3=ω4, and in the extension direction of the volute 30 body, the points corresponding to the maximum values ​​of y3 and y4 are consistent. The points of y3 (maximum height) and y4 (maximum extension length) are aligned, so that the guide ribs at the same axial position have the highest protrusion height and the largest coverage area at the same time, forming a strong constraint airflow guiding node.

[0086] like Figure 2 As shown, the bottom gap of the arc-shaped groove 33 is b', the top gap of the arc-shaped groove 33 is c', and the gap between two adjacent arc-shaped grooves 33 is a'. The value range of each parameter satisfies:

[0087] 2mm≤a'≤5mm;

[0088] 1mm≤b'≤3mm;

[0089] 1mm≤c'≤2mm.

[0090] The gap a' between adjacent arc-shaped grooves 33 (2mm≤a'≤5mm): This parameter directly determines the arrangement density of the second guide ribs 32. The range of values ​​covers the size requirements of different specifications of air conditioner volutes 30, which avoids the gap being too small, resulting in too dense guide ribs and increased air outlet resistance, and also prevents the gap being too large, which would weaken the constraint effect of the guide ribs on the airflow and fail to effectively disperse airflow pulsations.

[0091] Bottom gap b' of the arc groove 33 (1mm≤b'≤3mm): The bottom gap is a key channel dimension for airflow through the arc groove 33. A smaller value range can ensure the stability of the airflow velocity at the bottom of the groove and avoid the formation of vortices due to excessive bottom space. At the same time, in conjunction with the curved surface structure of the arc groove 33, it guides the airflow to flow smoothly along the groove wall and reduces friction noise.

[0092] The top gap c' of the arc-shaped groove 33 (1mm≤c'≤2mm): The top gap size is smaller than the gap a' of the adjacent arc-shaped groove 33, forming a channel shape that is narrow inside the groove and wide between the grooves. This can not only precisely constrain the airflow inside the groove, but also reserve enough flow space for the airflow between the grooves.

[0093] like Figures 1 to 7 As shown, an air conditioner including an indoor unit volute tongue and volute profile structure is also provided.

[0094] The implementation principle of this application embodiment is as follows: In the embodiment, ω1=ω2=ω3=ω4 and a=a' are required, that is, the position of the guide rib of the volute tongue 20 body needs to correspond to the position of the guide groove 23 of the volute 30 body.

[0095] The uniformity of angular frequency across the entire domain ensures that the fluctuations in the length and height of the guide ribs on the volute tongue 20 are completely consistent with the fluctuations in the height and extension length of the guide ribs on the volute shell 30. This results in a highly synchronized rhythm of the changes in airflow constraints throughout the entire process of airflow passing through the gap between the volute tongue 20 and the volute shell 30, avoiding the superposition of airflow turbulence caused by local periodic misalignment, maximizing the core function of "dispersing the periodic pulsation of airflow," and eliminating resonance noise at its source.

[0096] The values ​​of a (the gap between the top of the adjacent guide ribs of the volute tongue 20) and a' (the gap between the adjacent arc grooves 33 of the volute 30) are equal, ensuring that the flow space of the guide groove 23 on the side of the volute tongue 20 and the arc groove 33 on the side of the volute 30 is matched, so that the flow velocity of the airflow in the double-sided channel is kept balanced, avoiding airflow deviation caused by excessively large / small gaps on one side; through parameter matching, an integrated airflow control unit with complementary functions is formed, allowing the air conditioner to maintain a stable noise reduction effect at different speeds and improving the reliability of the whole machine operation.

[0097] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A volute profile structure for an air conditioner indoor unit, characterized in that, include: Housing (10); The housing (10) is provided with a volute tongue (20) and a volute shell (30), and a gap is reserved between the volute tongue (20) and the volute shell (30) to form an air outlet (40). The volute tongue (20) has multiple first guide ribs (22) distributed along its length in a sine and cosine pattern. The multiple first guide ribs (22) are used to integrate the airflow passing through the air outlet (40). The volute (30) has multiple second guide ribs (32) distributed along its length in a sine and cosine pattern. The multiple second guide ribs (32) are used to integrate the airflow passing through the air outlet (40).

2. The volute profile structure of the air conditioner indoor unit according to claim 1, characterized in that, The volute tongue (20) includes a first windward surface (21) and a first air guide surface (24) that is smoothly connected to the first windward surface (21) by bending; multiple first air guide ribs (22) are evenly distributed on the first windward surface (21) at intervals, and the ends of multiple first air guide ribs (22) extend to the first air guide surface (24).

3. The volute profile structure of the air conditioner indoor unit according to claim 2, characterized in that, Multiple first guide ribs (22) are arranged at intervals along their length on the first windward surface (21), and the length dimensions of multiple first guide ribs (22) on the first windward surface (21) are distributed in a sine and cosine pattern. A guide groove (23) for airflow is formed between any two adjacent groups of first guide ribs (22).

4. The volute profile structure of the air conditioner indoor unit according to claim 2, characterized in that, The height of the multiple first guide ribs (22) located on the first air guide surface (24) is distributed in a sine and cosine pattern along the length of the first air guide surface (24).

5. The volute profile structure of the air conditioner indoor unit according to claim 1, characterized in that, The top width of the first guide rib (22) is c, and the bottom width is d; the top gap between two adjacent first guide ribs (22) is a, and the bottom gap is b; the value range of each parameter satisfies: 2mm≤a≤5mm; 1mm≤b≤4mm; 0mm≤c≤2mm; 1mm≤d≤3mm.

6. The volute profile structure of the air conditioner indoor unit according to claim 1, characterized in that, The side of the volute (30) facing the volute tongue (20) is the second air guide surface (31). Multiple second air guide ribs (32) are evenly distributed on the second air guide surface (31) at intervals. An arc-shaped groove (33) for airflow is formed between any two adjacent sets of second air guide ribs (32).

7. The volute profile structure of the air conditioner indoor unit according to claim 6, characterized in that, The height of the multiple second guide ribs (32) located on the second air guide surface (31) is distributed in a sine and cosine pattern along the length of the second air guide surface (31).

8. The volute profile structure of the air conditioner indoor unit according to claim 7, characterized in that, Each end of the multiple second guide ribs (32) extends toward both sides of the second air guide surface (31), and the extension length of each second guide rib (32) is distributed in a sine and cosine pattern along the length direction of the second air guide surface (31).

9. The volute profile structure of the air conditioner indoor unit according to claim 7, characterized in that, The bottom gap of the arc-shaped groove (33) is b', the top gap of the arc-shaped groove (33) is c', and the gap between two adjacent arc-shaped grooves (33) is a'. The range of values ​​for each parameter satisfies: 2mm≤a'≤5mm; 1mm≤b'≤3mm; 1mm≤c'≤2mm.

10. An air conditioner, characterized in that, It includes the volute profile structure of the indoor unit of the air conditioner as described in any one of claims 1 to 9.

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