Vortex tongue structure of air conditioner and air conditioner

Abstract

The utility model provides a vortex tongue structure of an air conditioner. The vortex tongue structure comprises a vortex tongue plate, an air blocking part and a backflow part, wherein the vortex tongue plate is arranged near an air outlet of the air conditioner, and a backflow channel is formed between the vortex tongue plate and a fan of the air conditioner; the air blocking part is used for partially blocking backflow air at an inlet of the backflow channel; the air blocking part and the backflow part are sequentially arranged on the face, facing an air conditioner fan, of the vortex tongue plate in the direction from an air outlet of the air conditioner to the backflow channel. The volute tongue structure of the air conditioner is favorable for improving surge, keeping the air pressure of an air duct stable and ensuring the air outlet volume and the heat exchange effect of the air conditioner.

Description

Technical Field

[0001] The utility model belongs to the technical field of air conditioners, and in particular relates to an air conditioner vortex tongue structure and an air conditioner. Background Art

[0002] The fan structure of the air conditioner includes a crossflow fan and a volute. The crossflow fan is installed in the volute, and the volute is provided with an air outlet channel. A vortex tongue is provided on the side of the air outlet channel close to the crossflow fan to prevent the gas from circulating in the volute. When the crossflow fan rotates, most of the airflow flows out of the fan structure along the air outlet channel, and a small part of the airflow flows back along the gap between the vortex tongue and the crossflow fan. After rotating in the volute, it returns to the vortex tongue for a new round of diversion. The shape design of the vortex tongue and the spacing design between the vortex tongue and the crossflow fan will directly affect the pressure distribution in the air outlet channel, thereby changing the wind speed at the air outlet. However, when the airflow flows through the gap between the vortex tongue and the crossflow fan, the airflow impacts the vortex tongue to generate noise, and even whistling. At the same time, when the filter in the air conditioner is dirty and blocked, it is easy to cause local vortex, and a lateral pressure flow difference appears in the air outlet channel. The pressure difference in two directions makes the flow direction of the wind chaotic, resulting in surge. In order to eliminate the surge in the air outlet duct, a common practice is to set a triangular boss at the air outlet. On the one hand, it can reduce the air volume and keep the air pressure in the air outlet duct stable. On the other hand, when negative pressure appears in the air outlet duct, it can reduce the air vortex formed by the backflow to a certain extent and alleviate the surge. However, this solution cannot completely improve the surge. Local surge may still occur in the air outlet duct, and the circulating air volume is reduced, affecting the heat exchange effect on the indoor side. Utility Model Content

[0003] The utility model aims to overcome the shortcomings and deficiencies in the prior art and to provide an air conditioner vortex tongue structure, which is conducive to improving surge, maintaining stable air duct pressure, and ensuring the air volume and heat exchange effect of the air conditioner.

[0004] The utility model is realized by the following technical solutions:

[0005] An air conditioner vortex structure includes a vortex plate arranged near an air conditioner outlet to form a return flow channel with the air conditioner fan; a wind shielding portion used to partially shield the return flow wind at the entrance of the return flow channel; and a return flow portion used to guide the return flow wind; the wind shielding portion and the return flow portion are arranged in sequence on a side of the vortex plate facing the air conditioner fan along the direction from the air outlet to the return flow channel.

[0006] In the air conditioner vortex tongue structure provided by the utility model, at the return channel near the air outlet of the air conditioner, the wind shielding part is raised relative to the return part in the direction toward the air conditioner fan, which is conducive to reducing the return air volume, balancing the wind pressure, and avoiding the formation of vortex. When negative pressure occurs, the air flow vortex caused by the return flow can be reduced by blocking the wind shielding part, improving surge, and at the same time, it is conducive to increasing the air volume and maintaining the air pressure of the air duct stable. The air conditioner vortex tongue structure provided by the utility model is conducive to improving surge and ensuring the air volume of the air conditioner.

[0007] Furthermore, a side of the wind shield portion close to the air outlet of the air conditioner is an arc-shaped wind shield surface. The arc-shaped wind shield surface plays a role of wind shielding and makes the return air smooth, thereby avoiding excessive changes in wind pressure caused by a sudden increase in the return air volume.

[0008] Furthermore, the distance between the wind shielding surface and the air conditioner fan is not less than 6 mm. While ensuring the wind shielding effect and reducing the return air volume, the distance between the wind shielding surface and the air conditioner fan is controlled to avoid howling.

[0009] Furthermore, the distance between the wind shielding surface and the air conditioner fan gradually decreases along the direction from the air outlet to the return flow channel.

[0010] Furthermore, the wind shielding surface of the wind shielding portion covers the return flow portion. This structure is beneficial to improving the wind shielding effect and reducing the return air volume.

[0011] Furthermore, the return part includes a plurality of air guide grooves protruding from the spiral tongue plate, and the plurality of air guide grooves are extended along the return channel. The plurality of air guide grooves are arranged in parallel to guide part of the air flow in a specified direction to the air duct for recirculation to keep the wind pressure stable.

[0012] Furthermore, the depth of the air guide groove gradually decreases along the direction from the air outlet of the air conditioner to the return channel.

[0013] Furthermore, the distance between the air guide slot and the air conditioner fan is not less than 6 mm. The distance between the air guide slot and the air conditioner fan is controlled to maintain a certain return air volume and avoid howling caused by a small distance.

[0014] Furthermore, the distance between each part of the air guide groove and the air conditioner fan is the same. The distance between each part of the air guide groove and the air conditioner fan is controlled to keep the wind pressure at each part of the air guide groove stable.

[0015] The utility model also provides an air conditioner, comprising a shell, an air conditioner fan and the above-mentioned air conditioner vortex structure, wherein the air conditioner fan is arranged in the shell and forms an air outlet channel with the inner wall of the shell; the shell is provided with an air conditioning air outlet; the air conditioner vortex structure is arranged in the shell and located near the air conditioning air outlet, and a reflux channel is formed between the vortex plate of the air conditioner vortex structure and the air conditioner fan.

[0016] In order to better understand and implement the present invention, the present invention is described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the installation of the air conditioner vortex structure of Example 1 in the shell.

[0018] Figure 2 It is a schematic diagram of the position of the vortex structure and the fan of the air conditioner in Example 1.

[0019] Figure 3 yes Figure 1 A partial view of the .

[0020] Figure 4 It is a schematic diagram of the air conditioner vortex structure of Example 1.

[0021] Figure 5 It is a schematic diagram of the structure of the vortex tongue plate without the air guide groove of comparative example 1.

[0022] Figure 6 It is a schematic diagram of the spiral tongue plate structure with a boss set in Example 2.

[0023] Figure 7 It is the static pressure-air volume characteristic curve.

[0024] Figure 8 This is the overall pressure distribution diagram of the air duct in comparative example 1.

[0025] Fig. 9 It is a schematic diagram of the vortex tongue plate structure of comparative example 1.

[0026] Fig.10 yes Fig. 9 Wind pressure diagram at A31 on the surface of the middle backflow rib.

[0027] Fig.11 yes Fig. 9 Wind pressure diagram at A32 in the middle diversion trough.

[0028] Fig.12 It is a wind pressure diagram of the air conditioner vortex structure of Example 1.

[0029] Fig.13 This is a wind pressure diagram in the air guide groove of the air conditioner vortex structure of Example 1.

[0030] Fig.14 It is a wind pressure diagram of the air guide plate surface of the air conditioner vortex structure of Example 1. DETAILED DESCRIPTION

[0031] The following is a further detailed description of the embodiments of the utility model in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the embodiments of the utility model, rather than to limit the embodiments of the utility model. It should also be noted that, for ease of description, only parts related to the embodiments of the utility model are shown in the accompanying drawings, rather than all structures.

[0032] In addition, the terms first, second, third, etc. in the specification and claims are only used for the purpose of describing the same technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated, nor necessarily describing the order or time sequence. The terms are interchangeable where appropriate. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features.

[0033] Similarly, the terms "fixed" and "connected" used in the specification and claims should not be construed as limited to direct connection. Therefore, the expression "device A is connected to device B" should not be limited to a device or system in which device A is directly connected to device B, but means that there is a path between device A and device B, which may be a path including other devices or tools.

[0034] Example 1

[0035] This embodiment provides a scroll tongue structure for an air conditioner. Figure 1 This is a schematic diagram of the installation of the air conditioner vortex structure in the housing. Figure 2 This is a schematic diagram of the air conditioner's vortex structure and the location of the fan. Figure 3 yes Figure 1 A partial view of Figure 4 This is a schematic diagram of the air conditioner vortex structure, please refer to Figure 1-4 The air conditioner vortex tongue structure includes: a vortex tongue plate 1 arranged near the air outlet of the air conditioner and forming a return flow channel 6 with the air conditioner fan 4; a wind shielding portion 2 for partially shielding the return flow wind at the entrance of the return flow channel 6; a return flow portion 3 for guiding the return flow wind;

[0036] The wind shielding portion 2 and the return flow portion 3 are sequentially arranged on a side of the spiral blade plate 1 facing the air conditioner fan 4 along the direction of the return flow channel 6 at the air outlet of the air conditioner.

[0037] In the air conditioner vortex structure provided in this embodiment, a wind shield 2 is provided near the air outlet of the air conditioner on the vortex plate 1, which is conducive to reducing the return air volume, balancing the wind pressure, and avoiding the formation of vortices. When negative pressure occurs, the air flow vortex caused by the return flow can be reduced by blocking the wind shield 2, and the surge can be improved. At the same time, it is conducive to increasing the air volume, and the return air is guided by the return part 3 to keep the air pressure in the air duct stable, thereby maintaining the heat exchange efficiency on the indoor side. The air conditioner vortex structure of this embodiment is conducive to improving surge, ensuring the air volume of the air conditioner, and ensuring the heat exchange effect.

[0038] See also Figure 3-4 In this embodiment, the side of the wind shield 2 close to the air outlet of the air conditioner is an arc-shaped wind shield 21. The arc-shaped wind shield 21 plays a role of wind shielding and makes the return air smooth, avoiding excessive changes in wind pressure caused by a sudden increase in the return air volume.

[0039] See also Figure 3-4 The cross section of the wind shield 2 is fan-shaped. The distance between the arc-shaped wind shield 21 and the air conditioner fan 4 gradually decreases along the direction from the air outlet to the return channel 6. The arc-shaped wind shield 21 partially blocks the return air, and the distance between the arc-shaped wind shield 21 and the air conditioner fan 4 gradually decreases along the direction from the air outlet to the return channel 6, and further introduces the return air with reduced wind speed into the return portion 3.

[0040] In this embodiment, the wind shielding surface of the wind shielding portion 2 covers one end of the return flow portion 3 close to the air outlet of the air conditioner. This structure is conducive to improving the wind shielding effect and reducing the return air volume.

[0041] In this embodiment, the distance between the wind shielding surface 21 and the air conditioner fan 4 is not less than 6 mm. While ensuring the wind shielding effect and reducing the return air volume, the distance between the wind shielding surface 21 and the air conditioner fan 4 is controlled to avoid howling.

[0042] See also Figure 3-4 In this embodiment, the return portion 3 includes a plurality of parallel air guide grooves 31 protruding from the spiral tongue plate 1, and the plurality of air guide grooves 31 are extended along the return channel 6. The plurality of air guide grooves 31 are arranged in parallel to guide part of the air flow to the air duct in a specified direction for recirculation, thereby maintaining a stable wind pressure.

[0043] In one embodiment, after the return portion 3 is processed and formed, one end of the air guide groove 31 near the air outlet is filled to form the wind shield 2. The width of the return channel 6 between the wind shield 2 and the air conditioner fan 4 is the smallest. The airflow first flows through the wind shield 2, and the airflow flow rate is reduced by the wind shield 2. Then, the airflow enters the wind guide groove 31 with a larger width, and the airflow velocity is reduced. The airflow enters the air duct again under the guidance of the wind guide groove 31. By directly filling the wind guide groove 31 to obtain the wind shield 2, the wind shield 2 can be partially filled without changing the original return portion 3, thereby improving surge vibration and facilitating reprocessing on the basis of the existing air conditioner and processing during production.

[0044] See also Figure 3-4 In one embodiment, the return portion 3 includes a plurality of air guide plates 32 arranged in parallel, and the plurality of air guide plates 32 are installed on the spiral tongue plate 1 at a certain angle, and an air guide groove 31 with an opening toward the air conditioner fan 4 is formed between every two air guide plates 32.

[0045] See also Figure 3-4 In this embodiment, the depth of the air guide groove 31 gradually decreases along the direction from the air outlet of the air conditioner to the return channel 6. In one embodiment, the air conditioner fan 4 is cylindrical or square, and the distance between each point on the air guide groove 31 and the air conditioner fan 4 remains unchanged or gradually increases, reducing the flow rate of the return air and maintaining a stable wind pressure.

[0046] In this embodiment, the distance between the air guide slot 31 and the air conditioner fan 4 is not less than 6 mm. The distance between the air guide slot 31 and the air conditioner fan 4 is controlled to maintain a certain return air volume and avoid howling caused by too small a distance.

[0047] In this embodiment, the distance between each part of the air guide groove 31 and the air conditioner fan 4 is the same. The distance between each part of the air guide groove 31 and the air conditioner fan 4 is controlled to keep the wind pressure at each part of the air guide groove 31 stable. In one embodiment, the shape of the air guide groove 31 is suitable for the shape of the air conditioner fan 4. For example, the air conditioner fan 4 is cylindrical, and the return part 3 is correspondingly provided with an arc-shaped air guide groove 31; or, the air conditioner fan 4 is rectangular or cube-shaped, and the return part 3 is correspondingly provided with a linear air guide groove 31.

[0048] The performance of the air conditioner vortex structure of this embodiment was tested, and the air duct was tested using the vortex plate structure A1 without the air guide groove 31 as comparative example 1 and the vortex plate structure A2 with the boss 7 at the air outlet as comparative example 2. Figure 5 is a schematic diagram of a vortex blade structure without an air guide groove 31 of comparative example 1, Figure 6 It is a schematic diagram of the spiral tongue plate structure with a boss set in Example 2.

[0049] Figure 7is a static pressure-air volume curve, Table 1 is a real listening volume table, please refer to Figure 6-7 As shown in Table 1, in the characterization of the static pressure-wind pressure curve, when the fitting curve of the static pressure and the equal amount is smoother and there are no peaks and troughs, the better the pressure resistance of the air duct is, and when the return air side is dirty and blocked and forms a negative pressure in the air duct, no surge phenomenon will occur. Under the condition that the air conditioner fan 4 is in the normal air supply state and the number of revolutions is 1100rpm, the low air volume section of the air duct of the vortex plate structure A1 without the air guide groove 31 fluctuates significantly, the actual surging is obvious, and the air volume is the smallest; the air volume of the air duct of the vortex plate structure A2 with a boss 7 at the air outlet is affected by the boss, the air volume is reduced, the noise is increased, the low air volume section still fluctuates, the surge improvement is not thorough, and the overall heat exchange effect is deteriorated; the full air volume section curve in the air duct of this embodiment is smooth, the actual surging is significantly improved, and the air volume is the largest.

[0050] Table 1 Actual listening volume table

[0051]

[0052] From the air duct CFD analysis: the indoor fan speed is 1130rpm, Figure 8 This is the overall pressure distribution diagram of the air duct in Example 1. Fig. 9 is a schematic diagram of the vortex blade structure of Comparative Example 1, Fig.10 yes Fig. 9 Wind pressure diagram at A31, Fig.11 yes Fig. 9 Please refer to the wind pressure diagram at A32 in Figure 8-11 In the vortex plate structure of comparative example 1, a backflow rib A3 is provided, so that the wind pressure of the return air passing through the guide rib surface A31 is greater than the wind pressure of the guide groove A32 as a whole, which has the risk of turbulence. When the overall pressure of the air duct is insufficient due to the dirty filter screen and other conditions, more backflow gas passes through the guide groove, making the air duct system more unstable and prone to surge. From the analysis of the overall wind pressure, the vortex inside the fan is relatively chaotic, and turbulence is prone to occur when the return air volume increases, exacerbating the surge.

[0053] Fig.12 is a wind pressure diagram of the air conditioner scroll structure of Example 1, Fig.13 is a wind pressure diagram in the air guide groove 31 of the air conditioner scroll structure of Example 1, Fig.14 This is a wind pressure diagram of the air guide plate surface of the air conditioner vortex structure of Example 1. Please refer to Figure 12-14After adding the wind shield 2 to the vortex tongue plate 1, the wind pressure passing through the bottom of the wind shield 2 is basically zero, and the wind pressure difference passing through the air guide groove 31 and the surface of the air guide plate 32 is basically zero, so that the lateral wind pressure passing through the vortex tongue plate 1 is basically the same, the system is more stable, and the eccentric vortex is more stable than before the countermeasures by reducing the return air volume and increasing the circulating air volume in the air duct, reducing the risk of surge. When the filter is dirty and blocked, the overall pressure of the air duct is insufficient, and the return air of the system makes the eccentric vortex inside the fan more unstable, the existence of the wind shield 2 avoids excessive external gas backflow to form an unstable air duct and improves the surge phenomenon. Except for the normal eccentric vortex inside the cross-flow fan, there are no other abnormal vortices and turbulence, and the countermeasures are determined to be feasible.

[0054] Example 2

[0055] This embodiment provides an air conditioner. Figure 1 The air conditioner includes a shell 5, an air conditioner fan 4 and the above-mentioned air conditioner vortex structure. The air conditioner fan 4 is arranged in the shell 5 and forms an air outlet channel with the inner wall of the shell 5; the shell 5 is provided with an air conditioning outlet; the air conditioner vortex structure is arranged in the shell and located near the air conditioning outlet, and a reflux channel 6 is formed between the vortex plate 1 of the air conditioner vortex structure and the air conditioner fan 4.

[0056] The present invention is not limited to the above-mentioned embodiments. If various changes or modifications to the present invention do not depart from the spirit and scope of the present invention, and if these changes and modifications fall within the claims of the present invention and the scope of equivalent technologies, the present invention is also intended to include these changes and modifications.

Claims

1. An air conditioner vortex tongue structure, characterized in that: It includes a vortex tongue plate which is arranged near the air outlet of the air conditioner and forms a return flow channel between the vortex tongue plate and the air conditioner fan; A wind shielding portion for partially shielding the return wind at the entrance of the return channel; A return flow portion for guiding the return air; The wind shielding portion and the return flow portion are sequentially arranged on a side of the spiral tongue plate facing the air conditioner fan along a direction from the air outlet of the air conditioner to the return flow channel.

2. The air conditioner scroll tongue structure according to claim 1, characterized in that: A side of the wind shield portion close to the air outlet of the air conditioner is an arc-shaped wind shield surface.

3. The air conditioner scroll tongue structure according to claim 2, characterized in that: The distance between the wind shield surface and the air conditioner fan is not less than 6 mm.

4. The air conditioner scroll tongue structure according to claim 2, characterized in that: The distance between the wind shielding surface and the air conditioner fan gradually decreases along the direction from the air outlet to the return flow channel.

5. The air conditioner scroll structure according to any one of claims 1 to 4, characterized in that: The wind shielding surface of the wind shielding portion covers one end of the return portion close to the air outlet of the air conditioner.

6. The air conditioner scroll tongue structure according to claim 5, characterized in that: The return flow portion includes a plurality of parallel air guide grooves protruding from the spiral tongue plate, and the plurality of air guide grooves are extended along the return flow channel.

7. The air conditioner scroll tongue structure according to claim 6, characterized in that: The depth of the air guide groove gradually decreases along the direction from the air outlet of the air conditioner to the return channel.

8. The air conditioner scroll tongue structure according to claim 7, characterized in that: The distance between the air guide groove and the air conditioner fan is not less than 6 mm.

9. The air conditioner scroll tongue structure according to claim 8, characterized in that: The distances between the air guide groove and the air conditioner fan are the same at all locations.

10. An air conditioner, characterized in that: It comprises a housing, an air conditioner fan and the air conditioner vortex tongue structure according to any one of claims 1 to 9; The air conditioner fan is arranged in the shell and forms an air outlet channel with the inner wall of the shell; the shell is provided with an air conditioning outlet; the air conditioner vortex structure is arranged in the shell and located near the air conditioning outlet, and a reflux channel is formed between the vortex plate of the air conditioner vortex structure and the air conditioner fan.

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