Outdoor unit and air conditioner

Abstract

A fan cavity is formed in the outdoor unit, the outdoor unit comprises a front panel, an air guide ring, an air outlet mesh enclosure and an axial flow wind wheel, the front panel is provided with an air outlet corresponding to the fan cavity, the air outlet mesh enclosure covers the air outlet, the air guide ring is contained in a compressor cavity, the axial flow wind wheel is arranged in the compressor cavity, and the axial flow wind wheel is arranged in the compressor cavity. The air guide ring is arranged in the air outlet mesh enclosure and inserted into the insertion groove, a gap is formed between the periphery of the air guide ring and the inner circumferential wall of the air outlet mesh enclosure, the axial flow wind wheel comprises a hub and fan blades, and the blade tops of the fan blades are connected to the air guide ring. According to the technical scheme, noise and backflow caused by too large blade top gaps are avoided, and the working performance of the outdoor unit is guaranteed.

Description

Technical Field

[0001] The utility model relates to the field of air-conditioning equipment, in particular to an outdoor unit and an air conditioner. Background Art

[0002] At present, in the outdoor unit of the split air conditioner, an air guide ring is provided on the inner side of the front panel at the air outlet, and the wind wheel is rotatably inserted in the air guide ring to gather the airflow so that the airflow flows out of the outdoor unit through the air outlet. In order to ensure that the rotation of the wind wheel is not interfered by the air guide ring, and considering the processing error and assembly error, a large margin is required for the gap between the wind wheel and the air guide ring (i.e., the blade tip gap). However, if the blade tip gap is too large, a large blade tip leakage vortex will be formed, resulting in increased noise. At the same time, since the inner side of the outdoor unit is negative pressure (lower than the ambient pressure), a large blade tip gap will cause the airflow outside the mesh cover to flow into the outdoor unit from the blade tip gap, hindering the air from being discharged outward, increasing the power consumption of the fan, and thus affecting the heat exchange performance of the outdoor unit. Utility Model Content

[0003] The main purpose of the utility model is to provide an outdoor unit, aiming to avoid noise and backflow caused by excessive blade tip clearance, so as to ensure the working performance of the outdoor unit.

[0004] In order to achieve the above-mentioned object, a fan cavity is formed in the outdoor unit proposed by the utility model, and the outdoor unit comprises:

[0005] A front panel, corresponding to the fan cavity, is provided with an air outlet;

[0006] An air outlet mesh cover, the air outlet mesh cover is arranged on the air outlet;

[0007] An air guide ring is accommodated in the press chamber, and a gap is provided between the outer periphery of the air guide ring and the inner peripheral wall of the air outlet mesh cover; and

[0008] The axial flow wind wheel comprises a hub and wind blades, wherein the blade tops of the wind blades are connected to the wind guide ring.

[0009] Optionally, the front side of the fan blade is accommodated in the air guide ring, and the rear side of the fan blade extends out of the air guide ring.

[0010] Optionally, the length of the portion of the blade tip connected to the air guide ring accounts for 25% to 40%.

[0011] Optionally, the gap forms a return flow channel, and the return flow channel is formed by the first annular protrusion and the second annular protrusion of the air outlet mesh cover and the air guide ring structure, the first annular protrusion is protruding rearward, the second annular protrusion is connected to the front side of the first annular protrusion, and protrudes toward the center of the air outlet, the air guide ring and the first annular protrusion and the second annular protrusion are all spaced apart, and the outer diameter of the air guide ring is larger than the inner diameter of the second annular protrusion.

[0012] Optionally, a wind shielding annular surface is provided on the front side of the second annular bulge, and the wind shielding annular surface is gradually expanded in a forward direction.

[0013] Optionally, an axial distance between the air guide ring and the second annular bulge is 5 mm to 7 mm.

[0014] Optionally, the air guide ring extends into the air outlet mesh cover by a distance of 3 mm to 5 mm.

[0015] Optionally, a gap between the outer periphery of the air guide ring and the peripheral wall of the air outlet mesh cover is 5 mm to 7 mm.

[0016] Optionally, the air guide ring and the axial flow wind wheel are integrally formed by injection molding.

[0017] Optionally, the outdoor unit further includes a drive motor, which is mounted on the air outlet grille and is drivingly connected to the wheel hub.

[0018] Optionally, the driving motor is provided with a plurality of mounting feet spaced apart along the circumferential direction, the air outlet grille is provided with a mounting platform corresponding to the mounting feet, and the mounting feet are connected to the corresponding mounting platform via fasteners.

[0019] The utility model also provides an air conditioner, comprising the aforementioned outdoor unit.

[0020] In the technical solution of the utility model, the blade top and the air guide ring are connected to avoid forming an excessively large gap between the blade and the air guide ring. At the same time, since the shape of the air guide ring is more regular than that of the blade, the blade top will not have different heights like the blade. This makes the gap between the outer periphery of the air guide ring and the inner peripheral wall of the air guide ring more controllable, that is, there is no need to reserve too much margin, so that the gap between the outer periphery of the air guide ring and the inner peripheral wall of the air guide ring can be controlled within a reasonable range. While ensuring that the air guide ring will not be interfered with during its rotation, it can also effectively suppress the generation of blade top vortices, thereby effectively reducing noise and backflow, so as to ensure the working performance of the outdoor unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0022] Figure 1 A cross-sectional view of an embodiment of an outdoor unit of the utility model;

[0023] Figure 2 for Figure 1 A partial enlarged view of the middle A;

[0024] Figure 3 It is a partial structure explosion diagram of an embodiment of an outdoor unit of the utility model;

[0025] Figure 4 for Figure 3 A partial enlarged view of point B in the middle.

[0026] Description of Figure Numbers:

[0027] Label name Label name 100 Front Panel 410 The first ring 110 Air outlet 420 The second convex ring 200 Air guide ring 421 Wind shield 300 Axial flow fan 430 Mounting table 310 Wheels 440 Avoidance slot 320 Wind blade 450 Vias 400 Air outlet grille 500 Drive motor 401 Return channel 510 Mounting feet

[0028] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0031] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if the meaning of "and / or" appearing in the full text is to include three parallel schemes, taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0033] The utility model provides an outdoor unit.

[0034] In one embodiment of the present invention, Figures 1 to 4 As shown, a fan cavity is formed in the outdoor unit, and the outdoor unit includes:

[0035] The front panel 100 is provided with an air outlet 110 corresponding to the fan cavity;

[0036] An air outlet mesh cover 400, the air outlet mesh cover 400 is disposed on the air outlet 110;

[0037] An air guide ring 200 is accommodated in the press chamber, and a gap is formed between the outer periphery of the air guide ring 200 and the inner peripheral wall of the air outlet mesh cover 400; and

[0038] The axial flow wind wheel 300 includes a hub 310 and a wind blade 320 , and the blade top of the wind blade 320 is connected to the air guide ring 200 .

[0039] In the technical solution of the present utility model, by connecting the blade top of the fan blade 320 and the air guide ring 200, a too large gap between the fan blade 320 and the air guide ring 200 is avoided. At the same time, because the shape of the air guide ring 200 is more regular than that of the fan blade 320, unlike the fan blade 320, the blade top heights will not be different, so that the gap between the outer periphery of the air guide ring 200 and the inner peripheral wall of the air outlet mesh cover 400 is more controllable, that is, there is no need to reserve too much margin, so that the gap between the outer periphery of the air guide ring 200 and the inner peripheral wall of the air outlet mesh cover 400 can be controlled within a reasonable range. While ensuring that the air guide ring 200 will not be interfered with during rotation, it can also effectively suppress the generation of blade top vortex, thereby effectively reducing noise and backflow, so as to ensure the working performance of the outdoor unit.

[0040] Furthermore, in the present embodiment, the front side of the fan blade 320 is accommodated in the air guide ring 200, and the rear side of the fan blade 320 extends outward from the air guide ring 200. It can be understood that the orientation of the outdoor unit and its internal parts are all based on the use state of the outdoor unit, that is, the side where the front panel 100 is located is the front side. In the present embodiment, the front side of the fan blade 320 is accommodated in the air guide ring 200, which can avoid the formation of an excessively large gap between the fan blade 320 and the air outlet mesh cover 400, thereby further suppressing the generation of blade top vortex, effectively reducing noise and backflow, so as to ensure the working performance of the outdoor unit; at the same time, the rear side of the fan blade 320 extends outward, which can enhance the disturbing effect of the fan blade 320 on the airflow in the fan cavity, thereby increasing the air volume of the outdoor unit, so as to ensure the heat exchange performance of the outdoor unit.

[0041] Furthermore, in the present embodiment, the length proportion of the portion where the top of the fan blade 320 is connected to the air guide ring 200 is 25% to 40%. The length proportion mentioned here refers to the length proportion along the extension direction of the top of the fan blade 320. The top of the fan blade 320 is connected to the air guide ring 200 through the above-mentioned ratio, which can not only ensure the stable connection between the fan blade 320 and the air guide ring 200, but also ensure the turbulence effect of the fan blade 320 to ensure the air volume of the outdoor unit. Among them, the length proportion is preferably 30%. Of course, in other embodiments, the length proportion can also be adaptively adjusted to other values, such as 20% to 25% or 40% to 70%.

[0042] Furthermore, in this embodiment, if Figure 2 As shown, the gap forms a return channel 401, and the return channel 401 is formed by the first annular protrusion 410 and the second annular protrusion 420 of the air outlet mesh cover 400 and the air guide ring 200. The first annular protrusion 410 is convexly arranged toward the rear, and the second annular protrusion 420 is connected to the front side of the first annular protrusion 410 and is convexly arranged toward the center of the air outlet 110. The air guide ring 200 and the first annular protrusion 410 and the second annular protrusion 420 are all arranged at intervals, and the outer diameter of the air guide ring 200 is larger than the inner diameter of the second annular protrusion 420. The return channel 401 formed in this way is relatively tortuous, and can effectively suppress the return flow of the airflow in front of the outdoor unit to the fan chamber by extending the path of the airflow return, thereby avoiding increasing the efficiency of the fan and ensuring the heat exchange performance of the outdoor unit. Specifically, the path of the airflow returning from the return channel 401 is as shown in FIG. Figure 2As shown by the dotted arrow, the airflow in front of the outdoor unit flows back into the fan cavity, and needs to pass through the gap between the front end face of the air guide ring 200 and the second annular protrusion 420, and the gap between the outer periphery of the air guide ring 200 and the inner periphery of the second annular protrusion 420, that is, the airflow must undergo at least two 90° deflections, so as to be able to hinder the backflow to a certain extent. In addition, it can be understood that the inner peripheral wall of the second annular protrusion 420 is also the inner peripheral wall of the air outlet mesh cover 400. Of course, in other embodiments, it is also possible that the air outlet mesh cover 400 can be constructed only by the first annular protrusion 410, and the front end of the air guide ring 200 is provided with a wind shielding protrusion protruding outward, and the wind shielding protrusion is located on the front side of the peripheral wall of the air outlet mesh cover 400, which can also suppress the backflow.

[0043] Furthermore, in this embodiment, if Figure 2 As shown, the front side of the second annular protrusion 420 is provided with a wind shield annular surface 421, and the wind shield annular surface 421 is gradually expanded in the forward direction. Among them, the contour shape of the wind shield annular surface 421 after radial sectioning can be an arc or an inclined straight line. In this way, when the airflow on the front side of the front panel 100 enters between the front end surface of the air guide ring 200 and the second annular protrusion 420 along the wind shield surface, it needs to undergo a deflection greater than 90°, thereby further enhancing the blocking effect on the backflow, thereby avoiding increasing the efficiency of the fan to ensure the heat exchange performance of the outdoor unit; at the same time, when the airflow that has done work through the axial flow impeller 300 flows to the position of the wind shield annular surface 421, it can quickly diffuse outward, thereby increasing the air volume of the outdoor unit. Of course, in other embodiments, it is also possible to achieve the functions of guiding wind and inhibiting backflow by installing a trumpet-shaped expansion structure on the front side of the front panel 100.

[0044] Further, in this embodiment, please refer to Figure 2 , the axial distance a between the air guide ring 200 and the second annular protrusion 420 is 5mm to 7mm. In this way, a certain gap can be formed between the air guide ring 200 and the second annular protrusion 420, which can avoid the interference of the second annular protrusion 420 during the rotation of the air guide ring 200. At the same time, the distance here is not too large, which can improve the effect of suppressing backflow to a certain extent. In addition, it is beneficial to reduce the width of the outdoor unit in the front-to-back direction, which is beneficial to improve the miniaturization level of the outdoor unit. Of course, in other embodiments, the above distance can also be other ranges. For example, in the case of high processing accuracy and assembly accuracy, the distance can also be set to 3mm to 5mm, or, in other application scenarios, the distance can also be adjusted to 7mm to 9mm according to different needs.

[0045] Further, in this embodiment, please refer to Figure 2, the distance b that the air guide ring 200 extends into the air outlet mesh cover 400 is 3mm to 5mm. It can be understood that the air outlet mesh cover 400 can gather the airflow on the air outlet side of the air guide ring 200 and the axial flow fan wheel 300 through the peripheral wall to ensure that the airflow can be discharged to the outdoor unit through the air outlet 110. The insertion distance of the air guide ring 200 in the air outlet mesh cover 400 is within the aforementioned range, which can ensure the wall of the air outlet mesh cover 400 to gather the airflow, prevent the airflow on the air outlet side of the air guide ring 200 and the axial flow fan wheel 300 from escaping into the fan cavity, thereby ensuring the working performance of the outdoor unit. Of course, in other embodiments, the above distance can also be other ranges, such as 5mm to 7mm.

[0046] Further, in this embodiment, please refer to Figure 2 , the gap c between the outer periphery of the air guide ring 200 and the peripheral wall of the air outlet mesh cover 400 is 5mm to 7mm. This gap is also the gap between the outer periphery of the air guide ring 200 and the inner periphery of the first annular protrusion 410. In this way, there can be a sufficiently large gap between the peripheral wall of the air guide ring 200 and the air outlet mesh cover 400 to avoid interference during the rotation of the air guide ring 200. At the same time, the gap here is not too large, which can improve the effect of suppressing backflow to a certain extent. Of course, in other embodiments, the above distance can also be other ranges. For example, in the case of high processing accuracy and assembly accuracy, the distance can also be set to 3mm to 5mm, or, in other application scenarios, the distance can also be adjusted to 7mm to 9mm according to different needs.

[0047] Furthermore, in the present embodiment, the air guide ring 200 and the axial flow wind wheel 300 are integrally formed by injection molding. That is, the air guide ring 200 and the axial flow wind wheel 300 are both configured as plastic material, which is beneficial to reducing the cost of the outdoor unit and improving the lightweight level of the outdoor unit. The air guide ring 200 and the axial flow wind wheel 300 are integrally formed, which can improve the processing efficiency of the air guide ring 200 and the axial flow wind wheel 300. At the same time, the assembly process of the air guide ring 200 and the axial flow wind wheel 300 is omitted, which is beneficial to improving the assembly efficiency of the outdoor unit. Of course, in other embodiments, the air guide ring 200 and the axial flow wind wheel 300 can also be assembled into one or welded together after being separately formed, or the air guide ring 200 and the axial flow wind wheel 300 are configured as metal material and integrally formed by casting.

[0048] Furthermore, in this embodiment, if Figure 1 and Figure 3As shown, the outdoor unit further includes a drive motor 500, which is mounted on the air outlet mesh cover 400 and is driven and connected to the hub 310. In this way, it is not necessary to set a motor bracket in the fan cavity, which is conducive to simplifying the structure of the outdoor unit. In addition, the drive motor 500 is installed through the air outlet mesh cover 400, and the hub 310 is coaxially connected to the drive motor 500, which is conducive to ensuring the concentricity of the air guide ring 200 and the first annular protrusion 410, and can make the gap between the outer periphery of the air guide ring 200 and the inner periphery of the first annular protrusion 410 uniform in the circumferential direction, so as to avoid the outer periphery of the air guide ring 200 and the inner periphery of the first annular protrusion 410 from generating a large gap somewhere, which affects the working performance of the outdoor unit. Of course, in other embodiments, it is also possible to set a motor bracket in the fan cavity and install the drive motor 500 on the motor bracket.

[0049] Furthermore, in this embodiment, if Figure 3 and Figure 4 As shown, the drive motor 500 is provided with a plurality of mounting feet 510 spaced apart along the circumferential direction, and the air outlet mesh cover 400 is provided with a mounting platform 430 corresponding to the mounting feet 510, and the mounting feet 510 are connected to the corresponding mounting platform 430 by fasteners. In this way, the stable connection between the drive motor 500 and the air outlet mesh cover 400 can be ensured, so that the air outlet mesh cover 400 provides a stable support for the drive motor 500, the axial flow wind wheel 300 and the air guide ring 200, so as to ensure the smooth rotation of the axial flow wind wheel 300 and the air guide ring 200, thereby ensuring the working performance of the outdoor unit. Of course, in other embodiments, the drive motor 500 can also be installed on the air outlet mesh cover 400 by snap-fitting.

[0050] Furthermore, in this embodiment, if Figure 4 As shown, the air outlet mesh cover 400 forms an avoidance groove 440 corresponding to the drive motor 500, and a portion of the drive motor 500 is inserted into the avoidance groove 440. A plurality of mounting platforms 430 are arranged along the peripheral wall gap of the avoidance groove 440. The air outlet mesh cover 400 is also provided with a through hole 450 for the drive motor 500 to pass through. In this way, a portion of the drive motor 500 can be accommodated through the avoidance groove 440, which is beneficial to reducing the size of the outdoor unit in the front-to-back direction, and at the same time can further improve the installation stability of the drive motor 500.

[0051] The utility model also proposes an air conditioner, which includes an outdoor unit. The specific structure of the outdoor unit refers to the above-mentioned embodiment. Since the air conditioner adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be described one by one here.

[0052] The above description is only an optional embodiment of the present invention, and does not limit the protection scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly used in other related technical fields are included in the protection scope of the present invention.

Claims

1. An outdoor unit, characterized in that: A fan cavity is formed in the outdoor unit, and the outdoor unit comprises: A front panel, corresponding to the fan cavity, is provided with an air outlet; An air outlet mesh cover, the air outlet mesh cover is arranged on the air outlet; An air guide ring is accommodated in the fan cavity, and a gap is provided between the outer periphery of the air guide ring and the inner peripheral wall of the air outlet mesh cover; and The axial flow wind wheel comprises a hub and wind blades, wherein the blade tops of the wind blades are connected to the wind guide ring.

2. The outdoor unit according to claim 1, characterized in that: The front side of the fan blade is accommodated in the air guide ring, and the rear side of the fan blade extends out of the air guide ring.

3. The outdoor unit according to claim 2, characterized in that: The length of the portion of the blade tip connected to the air guide ring accounts for 25% to 40%.

4. The outdoor unit according to claim 1, characterized in that: The gap forms a return flow channel, and the return flow channel is formed by the first annular protrusion and the second annular protrusion of the air outlet mesh cover and the air guide ring structure. The first annular protrusion is protruding rearward, the second annular protrusion is connected to the front side of the first annular protrusion and protrudes toward the center of the air outlet. The air guide ring and the first annular protrusion and the second annular protrusion are all arranged at intervals, and the outer diameter of the air guide ring is larger than the inner diameter of the second annular protrusion.

5. The outdoor unit according to claim 4, characterized in that: The front side of the second annular convexity is provided with a wind shielding annular surface, and the wind shielding annular surface is gradually expanded in the forward direction; And / or, an axial distance between the air guide ring and the second annular bulge is 5 mm to 7 mm.

6. The outdoor unit according to claim 1, characterized in that: The distance that the air guide ring extends into the air outlet mesh cover is 3mm to 5mm; And / or, a gap between the outer periphery of the air guide ring and the peripheral wall of the air outlet mesh cover is 5 mm to 7 mm.

7. The outdoor unit according to claim 1, wherein: The air guide ring and the axial flow wind wheel are integrally formed by injection molding.

8. The outdoor unit according to any one of claims 1 to 7, characterized in that: The outdoor unit also includes a driving motor, which is installed on the air outlet grille and drivingly connected to the wheel hub.

9. The outdoor unit according to claim 8, characterized in that: The driving motor is provided with a plurality of mounting feet spaced apart along the circumferential direction, the air outlet grille is provided with mounting platforms corresponding to the mounting feet, and the mounting feet are connected to the corresponding mounting platforms through fasteners.

10. An air conditioner, characterized in that: The outdoor unit comprises the outdoor unit according to any one of claims 1 to 9.

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