Stabilizer and air management device having same

Abstract

The present invention relates to a stabilizer and an air management device having same. In the present invention, a first flow guide surface (21), a second flow guide surface (21'), and an inflection surface (21") are formed on the surface of a stabilizer (20). The inflection surface (21") connects the first flow guide surface (21) with the second flow guide surface (21'). The first flow guide surface (21) may have a first protrusion (210) and a first valley (212). The second flow guide surface (21') may have a second valley (212'). The inflection surface (21") may have no valley or protrusion or have an inflection surface protrusion (210"). Flow separation does not occur in the stabilizer (20) due to the protrusions (210, 210"), the valleys (212, 212'), and the arrangement of the protrusions (210, 210") and the valleys (212, 212'), thereby greatly reducing power consumption and noise.

Description

Stabilizer and air management device equipped therewith

[0001] The present invention relates to a stabilizer that guides the flow of air and an air management device having the stabilizer.

[0002] An air management system (AMS) is designed to maintain the air within a given space in an optimal condition, depending on its intended purpose. For example, in the summer, it can discharge indoor heat to the outside, lowering the indoor air temperature. In the winter, it can also increase the temperature of the exhausted air, ensuring that the indoor air remains relatively warmer than the outdoor air. Alternatively, it can purify the air within a given space and re-circulate it.

[0003] Among these air management devices, wall-mounted air conditioners use a cross-flow fan to generate airflow. As the air from the cross-flow fan is guided to the curved surface of the flow guide, the flow develops, and is guided by a stabilizer just before the discharge port and discharged to the outside.

[0004] Prior art document 1, Korean Patent Publication No. 10-1998-0085213, discloses that airflow generated by a cross-flow fan in a wall-mounted air conditioner is guided by a stabilizer just before exiting the exhaust port. Disclosed herein are stabilizers with flat or curved surfaces. However, curved stabilizers suffer from a problem in that flow separation occurs at locations past the inflection point.

[0005] In addition, prior art document 2, Korean Patent Publication No. 10-1998-0066528, also discloses that the surface of the stabilizer is flat.

[0006] First, as can be seen in Fig. 1, similar to the prior art of prior art document 1 and that disclosed in prior art document 2, the flow guide surface (7) of the stabilizer (5) is disclosed to be flat. That is, the air that has exchanged heat while passing through the heat exchanger (1) is pressurized by the cross-flow fan (3) and discharged, and just before being guided by the flow guide and discharged to the discharge port, it is guided along the flow guide surface (7) of the stabilizer (5) and discharged to the discharge port.

[0007] As can be seen in Fig. 1, when the flow guide surface (7) of the stabilizer (5) is entirely flat, the flow is not separated along the flow guide surface (7) and a stable discharge is formed. However, in the case of a cross-flow fan, which is a driving fan mainly used in wall-mounted air conditioners, although it is small in size and can produce a high air volume, it has the disadvantage of low static pressure characteristics created by the fan rotating. Therefore, when designing the shape of the product's discharge port, it is important to compensate for the low static pressure characteristics by changing some of the dynamic pressure of the flow discharged from the driving fan into static pressure. Generally, the cross-sectional area of ​​the passage portion connecting the fan to the discharge port is designed by gradually increasing the cross-sectional area so that the flow, which passes through the passage and decreases in speed, recovers the static pressure. In this design, if the cross-sectional area of ​​the passage is increased excessively, the flow cannot develop properly along the passage surface and separates due to the inertial force of the flow and the frictional force of the wall, resulting in a flow separation phenomenon. The unnecessary turbulence developed by this separation phenomenon causes energy loss and noise.

[0008] Meanwhile, in the design of air management devices, design variables may be restricted by the emotional aspects of consumers. This also applies to the shape and size of the outlet. When designing a product with the outer dimensions of the outlet fixed, the surface of the stabilizer may not be a single plane but may have two planes with an inflection surface (7"), that is, a first flow guide surface (7) and a second flow guide surface (7'). This structure is illustrated in Fig. 2. In this case, the flow path is designed to be more expanded based on the inflection surface (7"), but the flow develops upstream of the inflection surface (7") and has an inertial force. Therefore, the flow is likely to peel off when it passes the inflection surface (7") and cannot overcome the inertial force. Fig. 2 discloses that peeling occurs at a location past the inflection surface (7").

[0009] The purpose of the present invention is to solve the conventional problems as described above, and to prevent flow loss from occurring after the inflection surface when the surface guiding air flow in the stabilizer is divided based on the inflection surface.

[0010] The present invention is to ensure that the flow guided by the surface of the stabilizer is stably achieved in accordance with the design of the discharge port of the air management device.

[0011] The present invention is to reduce flow loss by forming protrusions and grooves in a stabilizer used in an air management device.

[0012] The present invention is to form a row of protrusions and a row of valleys in the axial direction of a driving fan in a stabilizer used in an air management device to control the occurrence of flow separation based on a curved surface.

[0013] In the present invention, protrusions and grooves are formed in the direction of air flow formed by the stabilizer to ensure smooth flow on the flow guide surface of the stabilizer.

[0014] According to a feature of the present invention for achieving the above-mentioned purpose, in the present invention, the surface of the stabilizer includes a first flow guide surface, a second flow guide surface, and a curved surface between the first flow guide surface and the second flow guide surface, and a protrusion and a groove may be formed on the first flow guide surface, and a groove may be formed on the second flow guide surface.

[0015] The present invention relates to a stabilizer for guiding the flow of air on a flow path, comprising a first flow guide surface and a second flow guide surface at a position passing through a cut-off portion, and a curved surface between the first flow guide surface and the second flow guide surface, wherein a first protrusion is provided on the first flow guide surface, and a first groove is formed extending in the air flow direction following the first protrusion in the air flow direction, and a second groove is formed extending in the air flow direction at a position corresponding to the first groove on the second flow guide surface.

[0016] The air management device of the present invention may include a housing having an air inlet and an air outlet, a driving fan that creates air flow through the air inlet and the air outlet, a heat exchanger that exchanges heat between air and a working fluid as the air flow by the driving fan passes through it, and a stabilizer that forms one side of a flow path through which air that has been heat-exchanged in the heat exchanger and is discharged to an indoor space flows, wherein the stabilizer has a first flow guide surface and a second flow guide surface at a position where it passes through a cut-off portion, and may have an inflection surface between the first flow guide surface and the second flow guide surface, and a first protrusion may be formed on the first flow guide surface and a first groove may be formed extending in the air flow direction following the first protrusion in the air flow direction, and a second groove may be formed on the second flow guide surface at a position corresponding to the first groove and extending in the air flow direction.

[0017] On both sides where the first projection and the first groove formed on the first flow guide surface are connected and arranged, the first groove can be arranged to extend in the air flow direction.

[0018] A curved surface protrusion can be formed by protruding from the curved surface corresponding to the first and second curves.

[0019] The above first protrusion and the curved surface protrusion have a predetermined length extending in the direction of air flow, have a predetermined thickness up to a predetermined height based on the direction of air flow, and may become narrower toward the tip above a certain height.

[0020] In the first protrusion and the first groove, the protrusion spacing / bone spacing is ≥ 2, and the bone spacing is ≤ 0.11*blade length, where the blade length means the length in one section where the blades are arranged cylindrically in the driving fan.

[0021] The relationship is that the depth of the groove = protrusion height (H) * 0.66, and the fan diameter * 0.01 ≤ protrusion height = protrusion diameter ≤ fan diameter * 0.02.

[0022] The draft angle of the above protrusion may be in the range of 15 to 20° and the radius of the protrusion tip may be in the range of 0.3 to 0.5 mm.

[0023] The stabilizer according to the present invention and the air management device having the same may have at least one of the following effects.

[0024] The present invention prevents flow separation from occurring at a location past a curved surface between a first flow guide surface and a second flow guide surface of a stabilizer. That is, protrusions and grooves are provided on the first flow guide surface and the second flow guide surface to ensure that flow along the flow guide surface occurs without separation. Therefore, the present invention has the effect of preventing flow loss from occurring after the curved surface.

[0025] In the present invention, when the front outlet on the front surface of the housing and the bottom outlet on the bottom surface of the housing are formed adjacent to each other, the airflow guided by the stabilizer can flow more stably to the adjacent front outlet and bottom outlet.

[0026] In the present invention, projections and valleys are formed on the first flow guide surface, the second flow guide surface, and the inflection surface of the stabilizer. The projections and valleys or valleys may be provided in the airflow direction on the first flow guide surface. At the same time, the projections and valleys may be arranged in a row in the axial direction of the driving fan. Therefore, the flow generated in the entire area of ​​the driving fan can be stably formed.

[0027] In some embodiments of the present invention, protrusions are placed on the inflection surface or the first flow guide surface. The protrusions placed on the inflection surface have a shape similar to the protrusions of a humpback whale. These protrusions generate vortices in the direction of air flow, thereby supplying momentum to the flow flowing along the surface of the stabilizer, thereby having the effect of delaying or suppressing flow separation.

[0028] In one embodiment of the present invention, a groove extending in the direction of air flow is formed on the first flow guide surface and the second flow guide surface. The structure of the groove is similar to that formed on the surface of a scallop shell, for example. A flow-direction vortex is generated at the edge of such a groove or strip, and this vortex supplies momentum to the flow flowing along the surface, thereby having the effect of delaying or suppressing flow separation.

[0029] Figure 1 is a graph showing that flow occurs on a flat flow guide surface in a prior art.

[0030] Figure 2 is a graph showing that in the prior art, there is a first flow guide surface and a second flow guide surface based on a curved surface, and flow separation occurs at the curved surface.

[0031] Figure 3 is a cross-sectional perspective view showing the internal configuration of an air management device of an embodiment of the present invention.

[0032] Figure 4 is a cross-sectional side view showing the internal configuration of an air management device of an embodiment of the present invention.

[0033] Figure 5 is a bottom perspective view showing the configuration of a stabilizer constituting an embodiment of the present invention.

[0034] Figure 6 is an enlarged perspective view showing in detail the surface of a stabilizer constituting an embodiment of the present invention.

[0035] Figure 7 is a bottom perspective view showing a stabilizer and its surroundings in an embodiment of the present invention.

[0036] Figure 8 is an explanatory drawing explaining limitations on the position and height of the protrusion in an embodiment of the present invention.

[0037] Figure 9 is an explanatory drawing explaining limitations on the shape of a protrusion in an embodiment of the present invention.

[0038] Fig. 10 is an explanatory drawing for explaining the spacing between protrusions in an embodiment of the present invention.

[0039] Figure 11 is an explanatory diagram explaining limitations related to a bone in an embodiment of the present invention.

[0040] Figure 12 is a plan view showing various examples of protrusions and grooves arranged on the first flow guide surface and the second flow guide surface in the present invention.

[0041] Figure 13 is an explanatory diagram comparing the configuration and modified examples of an embodiment of the present invention to explain performance.

[0042] Figure 14 is a perspective view showing various examples of how projections and grooves are arranged on the first flow guide surface, the second flow guide surface, and the inflection surface in the present invention.

[0043] Figure 15 is an operational state diagram showing that, in the present invention, air in an indoor space is sucked in by a driving fan, heat exchanged, and guided by a flow guide and stabilizer before being discharged.

[0044] Hereinafter, some embodiments of the present invention will be described in detail with reference to exemplary drawings. When designating components in each drawing, it should be noted that, where possible, identical components will be given the same reference numerals, even if they appear in different drawings. Furthermore, when describing embodiments of the present invention, if a detailed description of a related known structure or function is deemed to hinder understanding of the embodiments of the present invention, such detailed description will be omitted.

[0045] FIG. 3 shows a cross-sectional perspective view of an air management device employing a preferred embodiment of a stabilizer of the present invention, FIG. 4 shows a side cross-sectional view, and FIG. 5 shows a bottom perspective view of a stabilizer of an embodiment of the present invention.

[0046] The stabilizer (20) of the embodiment of the present invention can be used in various types of air management devices. The drawing illustrates the application of the embodiment of the present invention to a wall-mounted, detachable air management device. However, the stabilizer (20) of the embodiment of the present invention can be used in various types of air management devices.

[0047] The exterior of the air management device illustrated may be formed by a housing (10). The housing (10) may form most of the front, top, rear, both sides, and bottom of the air management device. Of course, some parts of the exterior of the air management device may be made of other components, but the housing (10) may constitute most of the exterior of the air management device.

[0048] A chassis (12) may be installed inside the housing (10). The chassis (12) is a portion to which various components may be mounted and may form the frame of the air conditioner. In the present embodiment, referring to FIG. 4, the chassis (12) forms the rear exterior. The shape of the chassis (12) is not limited to that shown in the drawing and may have various shapes.

[0049] In this embodiment, a flow guide (14) is formed in a part of the chassis (12). The flow guide (14) is a part that guides the managed air to be discharged to the outside of the housing (10). The space formed by the flow guide (14) may be a part of a fan installation space (16). The fan installation space (16) is a part surrounded by the flow guide (14) and a heat exchanger (30) to be described below.

[0050] In the illustrated example, the inner surface of the fan installation space (16), which is the surface of the flow guide (14), is a curved surface (18) having a predetermined radius of curvature. The curved surface (18) faces the outer surface of the driving fan (32) to be described below and forms a flow path between the driving fan (32). The radius of curvature of the curved surface (18) may be formed to be gradually larger downward than in the upstream portion. That is, the radius of curvature at each point in the air flow direction of the curved surface (18) of the flow guide (14) may change.

[0051] The curvature radii of the above-mentioned curved surface (18) can be formed to be larger than the radius of the driving fan (32). Therefore, when the outer surface of the driving fan (32) is positioned adjacent to the nozzle (19), which is the starting area of ​​the above-mentioned curved surface (18), the gap between the outer surface of the driving fan (32) and the above-mentioned curved surface (18) becomes larger as it goes downstream of the above-mentioned curved surface (18). This is well illustrated in Fig. 4. That is, the flow space formed between the curved surface (18) of the above-mentioned flow guide (14) and the driving fan (32) becomes wider as it goes from the upstream portion to the downstream portion. Alternatively, the distance between the curved surface (18) of the above-mentioned flow guide (14) and the outer surface of the driving fan (32) becomes wider as it goes from the upstream portion to the downstream portion.

[0052] There is a stabilizer (20) at a position past the downstream portion of the curved surface (18) of the above-mentioned flow guide (14). The stabilizer (20) is a portion where air flowing along the above-mentioned flow guide (14) is guided just before being discharged through the front outlet (24) and the bottom outlet (26). One surface of the stabilizer (20) forms one side of the flow path through which the air flows, in this case, the ceiling. The portion of the stabilizer (20) closest to the driving fan (32) is a cut-off portion (20') and has a curved surface that changes abruptly.

[0053] As can be seen in FIG. 5, the above stabilizer (20) is formed to extend long from side to side when the housing (10) is viewed from the front. The surfaces of the stabilizer (20) exposed to the airflow path include a first flow guide surface (21), a second flow guide surface (21'), and an inflection surface (21"). In the direction of airflow, the first flow guide surface (21), the inflection surface (21"), and the second flow guide surface (21') are arranged in that order after passing the cut-off portion (20'). The first flow guide surface (21) and the second flow guide surface (21') are not continuous planes, but are planes whose extension directions are different based on the inflection surface (21"). Various configurations for guiding the flow of air can be arranged on the first flow guide surface (21), the second flow guide surface (21'), and the inflection surface (21').

[0054] First, let's look at the example illustrated in Fig. 6. Here, a first projection (210) and a first groove (212) are formed on the first flow guide surface (21) of the stabilizer (20). The first projection (210) is arranged on the first flow guide surface (21) connected to the cut-off portion (20'). A plurality of the first projections (210) are formed in a row in the left-right direction of the stabilizer (20), that is, in the axial direction of the driving fan (32). The first groove (212) can be formed long, starting from a position a predetermined distance away in the air flow direction (arrow A direction) from the position where the first projection (210) is formed. And, a first groove (212) is formed in the air flow direction (A) between the first protrusion (210) and the first valley (212) connected to the first protrusion (210). The length of the first valley (212) extending between the first protrusions (210) is longer than that of the first valley (212) connected to the first protrusion (210). This is because the starting point of the first valley (212) between the first protrusions (210) is closer to the cut-off portion (20') than that of the first protrusion (210).

[0055] The above inflection surface (210") has an inflection surface protrusion (210"). The inflection surface protrusion (210") is located at a position corresponding to the first valley (212) that is connected to the first protrusion (210). That is, the inflection surface protrusion (210") is located on the inflection surface (21") following the first valley (212) that is connected to the first protrusion (210).

[0056] On the second flow guide surface (21'), second grooves (212') are formed at positions corresponding to the first grooves (212) of the first flow guide surface (21). The second grooves (212') are also formed in a row in the axial direction of the driving fan (32) at a predetermined interval. The length of the second grooves (212') is formed to be constant, and extends to a portion a predetermined distance away from the position where the second flow guide surface (21') ends.

[0057] There is a suction port (22) on one side of the housing (10). The suction port (22) may be on the upper surface of the housing (10). The suction port (22) serves as an inlet through which air in an indoor space outside the housing (10) flows into the interior of the housing (10). When the housing (10) is viewed from the front, the suction port (22) may be formed to extend longwise from side to side on the upper surface of the housing (10).

[0058] The front lower portion of the housing (10) may have a front outlet (24). The front outlet (24) is a portion through which managed air is discharged. The front outlet (24) may also be formed to extend longwise from side to side on the front of the housing (10) when the housing (10) is viewed from the front.

[0059] The bottom surface of the housing (10) may have a bottom discharge port (26). The bottom discharge port (26) may be located adjacent to the front discharge port (24). That is, the bottom discharge port (26) may be located at the front of the bottom surface of the housing (10). Air may be discharged toward the front and bottom of the housing (10) through the front discharge port (24) and the bottom discharge port (26).

[0060] A vane (28) may be provided to control the opening and closing of the above-mentioned bottom discharge port (26) and the direction of flow of air discharged from the above-mentioned bottom discharge port (26). The specific configuration of the vane (28) is omitted for explanation.

[0061] A heat exchanger (30) may be provided inside the housing (10). The heat exchanger (30) is a portion where the working fluid of the heat exchange cycle and the air sucked in from the indoor space through the intake port (22) exchange heat. The working fluid circulating in the heat exchange cycle flows inside the heat exchanger (30), and the working fluid and the air sucked in from the indoor space exchange heat with each other. The heat exchanger (30) may be arranged to surround approximately half of the outer surface of the driving fan (32). In the illustrated embodiment, the heat exchanger (30) is arranged to surround an angular area that is approximately half of the cross-section of the driving fan (32).

[0062] The driving fan (32) sucks in air from the indoor space through the intake port (22) and creates a flow of air so that it is discharged through the front outlet port (24) or the bottom outlet port (26). The driving fan (32) may be a cross-flow fan. The driving fan (32) is divided into sections by a plurality of blades (33) arranged in a cylindrical shape. The driving fan (32) has an overall cylindrical shape and sucks in air through one outer surface. The air sucked into the driving fan (32) passes through the interior and is discharged through an area facing the curved surface (18) of the flow guide (14) and guided along the curved surface (18).

[0063] The above driving fan (32) is installed so that one outer surface thereof is adjacent to the curved surface (18) of the flow guide (14) with a predetermined gap therebetween. Since the radius of the driving fan (32) is smaller than the radius of curvature of the curved surface (18), the gap between the outer surface of the driving fan (32) and the curved surface (18) of the flow guide (14) increases from the upstream portion to the downstream portion of the flow guide (14).

[0064] There may be a louver (36) on the flow path between the stabilizer (20) and the area adjacent to the downstream portion of the flow guide (14). The louver (36) can control the direction of air flow in the left and right directions when looking at the front outlet (24) or the bottom outlet (26) from the front.

[0065] Meanwhile, the first protrusion (210) and the inflection surface protrusion (210") and the first groove (212) and the second groove (212') are formed in a kind of biomimetic shape. For example, the first protrusion (210) and the inflection surface protrusion (210") are similar to the shape of the protrusions on a humpback whale, and the first groove (212) and the second groove (212') are similar to the shape of the grooves on the outer surface of the scallop shell.

[0066] Fig. 8 is a description of the experimental results for the position, height, and shape of the first protrusion (210). First, Fig. 8 (a) shows the position of the first protrusion (210) on the first flow guide surface (21) of the stabilizer (20). It was found that the improvement effect was greater when the position of the first protrusion (210) was a certain distance or more from the cut-off portion (20'). That is, the longer the distance (L1) from the starting point of the first flow guide surface (21) to the first protrusion (210), the better the performance. In other words, the power consumption is relatively lowered, and noise is also reduced.

[0067] Figure 8 (b) shows the height (H) of the first protrusion (210). When the height (H) of the first protrusion (210) is below a certain level, the performance is better. When there is a difference in the height (H) of the first protrusion (210), there is no difference in power consumption, but there is an effect of reducing noise.

[0068] Next, Fig. 9 illustrates the configuration of a protrusion (210)(210"). First, Fig. 9 (a) illustrates a protrusion according to a conventional technique, and Fig. 9 (b) illustrates a protrusion having a relatively blunt shape compared to a protrusion according to a conventional technique.

[0069] And, in (c) and (d) of FIG. 9, the protrusions (210, 210") used in the present invention are illustrated. The protrusions (210, 210") have a predetermined thickness up to a certain height and have a shape in which the width becomes narrower toward the tip above a certain height. In (d) of FIG. 9, the side shape of the protrusions (210, 210") is illustrated, and they are designed to have a predetermined length in the airflow direction. For reference, the protrusions (210, 210") are not expressed in the shapes of (c) and (d) of FIG. 9 in other drawings for convenience.

[0070] The shape of the above protrusion (210, 210") is a biomimetic shape, and when compared to that shown in (a) or (b) of Fig. 9, it was found to be effective when the thickness is below a certain level.

[0071] Meanwhile, Fig. 10 shows that the spacing between the protrusions (210, 210"), i.e., the spacing in the axial direction of the driving fan (32), is different. However, the experimental results show that the spacing between the protrusions (210, 210") is not significant in terms of power consumption or noise.

[0072] To summarize the contents of FIGS. 8 to 10, among the position, height, shape, and spacing of the protrusions (210) (210"), the position, height, and thickness are important factors for performance, but the spacing in the axial direction of the driving fan (32) has no effect on performance. In addition, when the protrusion (210) is a certain distance or more from the cut-off portion (20'), the performance improvement effect is large, and the height and thickness of the protrusions (210) (210") are effective for performance when they are below a certain level.

[0073] Next, FIG. 11 shows the experimental results for the performance related to the first groove (212) and the second groove (212') in the stabilizer (20) of the present invention. FIG. 11 (a) shows a case where grooves are continuously formed starting from the first flow guide surface (21) and passing through the inflection surface (21") to the second flow guide surface (21'). FIG. 11 (b) shows a case where grooves are not formed on the first flow guide surface (21), the inflection surface (21"), and the second flow guide surface (21'). That is, this is the case of the prior art.

[0074] In (c) of Fig. 11, grooves are formed in the first flow guide surface (21) and the second flow guide surface (21') in a direction perpendicular to the air flow direction, i.e., in the axial direction of the driving fan (32). In this case, there is a relatively greater power consumption reduction effect compared to (b) of Fig. 11.

[0075] In (d) of Fig. 11, it is shown that grooves (212, 212') are formed in the air flow direction (A) on the first flow guide surface (21) and the second flow guide surface (21'). This is one of the other embodiments of the present invention shown in Fig. 12. In this case, there was a relatively greater reduction in power consumption compared to the other cases of Fig. 11.

[0076] Meanwhile, another embodiment of the present invention is illustrated in Fig. 12. First, the inflection surface protrusion (210") was not formed on the inflection surface (21"), and the lengths of the first grooves (210) of the first flow guide surface (21) were all formed to be the same. This is illustrated in (a) of Fig. 12.

[0077] In (b) of Fig. 12, the length of the first groove (210) is relatively longer at a position where the first protrusion (210) is not present, and the inflection surface protrusion (210") is not formed on the inflection surface (21"). In the embodiment shown in Fig. 12, the reduction in power consumption is approximately 5% more than in the prior art.

[0078] And, Fig. 13(a) depicts the state depicted in Fig. 12(b), and Fig. 13(b) depicts a case in which the second groove (212') has been deleted, compared to Fig. 13(a). In this case, an increase in power consumption occurred. This is proof that the presence of the second groove (212') is effective.

[0079] In (c) of Fig. 13, the first protrusion (210) is moved between the first grooves (212) in Fig. 13 (a), and the lengths of all the first grooves (212) are made the same. However, even in this case, an increase in power consumption occurred. This is proof that the first protrusion (210) and the first groove (212) need to be arranged sequentially in the airflow direction (A).

[0080] Also, Fig. 14 (a) illustrates a case similar to Fig. 13 (a), and based on this, Fig. 14 (b) illustrates a case where the length of the second groove (212') is made longer. In this case, a decrease in power consumption occurred. Therefore, it is recommended that the length of the second groove (212') be made as long as possible.

[0081] In Fig. 14 (c), a surface projection (210") is placed on the surface of inflection (21"), and the length of the second groove (21') is also made longer than in Fig. 14 (a). In this case, the power consumption was reduced by more than 30% compared to the case of Fig. 14 (b). Therefore, it was confirmed that placing a surface projection (210") on the surface of inflection (21") has a great influence on the effect.

[0082] The operation of a stabilizer according to the present invention having the configuration described above and an air management device equipped therewith is described below.

[0083] The air management device of the embodiment of the present invention is a split-type air conditioner, and the drawing shows an indoor unit. The indoor unit is also of a type that can be hung on a wall. In this type of air management device, heat exchange occurs as the working fluid from the outdoor unit passes through the heat exchanger (30), and the air for air conditioning, which is drawn in through the intake port (22) by the driving fan (32), passes through the heat exchanger (30).

[0084] Meanwhile, in the present invention, the following formulas can be experimentally obtained between the first protrusion (210), the first groove (212), and the blade (33) of the driving fan (32).

[0085] First, there is a relationship of inter-protrusion spacing / inter-bone spacing ≥ 2.

[0086] The protrusions (210) are shaped to protrude into the product's discharge path, and thus can act as flow resistance. Therefore, if the protrusions (210) are positioned too closely together in the path, the discharge port area will decrease, airflow will decrease, and each protrusion may act as a point sound source due to flow collision, resulting in increased noise. The present invention aims to minimize these aspects and maximize the blowing performance of a vortex generator.

[0087] The protrusions (210) should be arranged in a row with the valleys (212) so that the respective flow separation reduction effects can be combined and the effect can be maximized. However, if there are too many protrusions, performance degradation may occur. Therefore, under the condition that the protrusions (210) and valleys (212) are arranged in a row, it was experimentally confirmed that the optimal number is one protrusion (210) per two valleys (212) during experimental verification. However, if the valley spacing is sufficiently small, the protrusion spacing should be at least three times the valley spacing to avoid excessive protrusions, so an inequality was used in the relational expression. In addition, since the protrusions (210) and valleys (212) are arranged in a row, the spacing between protrusions / valley spacing becomes an integer value.

[0088] Next, there is a relationship of groove spacing ≤ 0.11*blade length. This suggests that there should be at least 10 grooves (212) interacting in one section where the blades (33) form a cylinder in the driving fan (32). When the groove widths are the same, if the groove spacing is too large, the area affected by the groove shape becomes smaller compared to the entire flow path, so a certain number should be present.

[0089] Next, there is a relationship of valley depth = protrusion height (H) * 0.66. The valley depth must also increase in proportion to the protrusion height to generate a vortex of an appropriate size or larger to achieve the desired effect through the invention.

[0090] Next, there is a relationship of fan diameter* 0.01 ≤ protrusion height = protrusion diameter ≤ fan diameter* 0.02, and the draft angle of the protrusion is in the range of 15 to 20° and the radius of the protrusion tip is in the range of 0.3 to 0.5 mm.

[0091] This formula restricts the height and diameter of the protrusions to be within 1 to 2% of the fan diameter. The larger the fan diameter, the greater the flow rate generated when rotating at the same rotational speed. Furthermore, the faster the flow rate, the smaller the size of the local vortex generated by the protrusion shape. Therefore, the protrusion shape and size must be proportional to the fan diameter to ensure sufficient vortex generation, which suppresses flow separation. Thus, setting the height and diameter of the protrusions to 1 to 2% of the fan diameter can improve performance in various operating modes.

[0092] The draft angle of the protrusions is designed to maximize their performance as vortex generators, rather than their disadvantages as simple blocking resistors. The shape is minimized while the protrusions are present to maintain the effect of reducing flow separation caused by vortex generation. The protrusion tip radius was also chosen based on experimental evidence showing a tendency for effectiveness to diminish at radiuses exceeding 0.5 mm, as well as the processing limitations of mass production (0.3 mm or more).

[0093] In the present invention having such a configuration, air that has been heat-exchanged in the heat exchanger (30) and has, for example, a relatively low temperature enters the driving fan (32) and is discharged toward the curved surface (18) of the driving fan (32) facing the flow guide (14). The air discharged from the driving fan (32) moves along the curved surface (18) of the flow guide (14), and is guided along the first flow guide surface (21), the second flow guide surface (21'), and the inflection surface (21") of the stabilizer (20) at a position adjacent to the front discharge port (24) or the bottom discharge port (26), thereby suppressing the separation of the flow and achieving the effect of noise reduction by the first protrusion (210), the first valley (212), the inflection surface protrusion (210"), and the second valley (212').

[0094] In particular, when the first projection (210) and the first groove (212) are arranged in a row in the air flow direction (A) on the first flow guide surface (21), and the first projection (210) and the first groove (212) are arranged in a row in the axial direction of the driving fan (32), performance improvement is effective.

[0095] In addition, when there is a curved surface projection (210") on the curved surface (21"), there is a relatively greater performance improvement effect, and when the second groove (212') is formed in the air flow direction (A) on the second flow guide surface (21'), there is also a greater performance improvement effect. In particular, it is preferable that the length of the second groove (212') be formed relatively long.

[0096] Although all components constituting embodiments of the present invention have been described as being combined or operating in combination, the present invention is not necessarily limited to such embodiments. That is, within the scope of the present invention, all components may be selectively combined and operated in one or more combinations.

Claims

1. In a stabilizer that guides the flow of air on the euro, At a position where the cut-off section is passed, a first flow guide surface and a second flow guide surface are provided, and a curved surface is provided between the first flow guide surface and the second flow guide surface. A stabilizer having a first projection formed on the first flow-guided surface, a first groove formed by extending in the airflow direction following the first projection in the airflow direction, and a second groove formed by extending in the airflow direction at a position corresponding to the first groove on the second flow-guided surface.

2. A stabilizer in which, in the first paragraph, the first projection and the first groove formed on the first flow-guided surface are arranged in a connected manner on both sides, and the first groove is arranged to extend in the airflow direction.

3. A stabilizer in the second paragraph, wherein a curved surface protrusion is formed by protruding from the curved surface corresponding to the first and second grooves.

4. In the third paragraph, the first protrusion and the inflection surface protrusion have a predetermined length extending in the airflow direction, a predetermined thickness up to a predetermined height based on the airflow direction, and a stabilizer whose width becomes narrower toward the tip above a predetermined height.

5. A stabilizer according to any one of claims 1 to 4, wherein the projection spacing / bone spacing between the first protrusion and the first groove is ≥ 2, and the bone spacing is ≤ 0.11*blade length, wherein the blade length means the length in one section in which the blades are cylindrically arranged in the driving fan.

6. A stabilizer in which, in the fifth paragraph, the groove depth = projection height (H) * 0.66, and the fan diameter * 0.01 ≤ projection height = projection diameter ≤ fan diameter * 0.

02.

7. A stabilizer according to claim 6, wherein the draft angle of the protrusion is in the range of 15 to 20° and the radius of the protrusion tip is in the range of 0.3 to 0.5 mm.

8. Housing having an air inlet and an air outlet; A driving fan that creates air flow through the above air inlet and air outlet, A heat exchanger that exchanges heat between air and working fluid as the air flow by the above driving fan passes through it. It includes a stabilizer that forms one side of a flow path through which air that is heat exchanged in the above heat exchanger and discharged into the indoor space flows, The above stabilizer has a first flow guide surface and a second flow guide surface at a position where the cut-off section is passed, and has a curved surface between the first flow guide surface and the second flow guide surface. An air management device in which a first projection is formed on the first flow-guided surface, a first groove is formed extending in the airflow direction following the first projection in the airflow direction, and a second groove is formed on the second flow-guided surface in a position corresponding to the first groove and extending in the airflow direction.

9. An air management device in which, in clause 8, the first projection and the first groove formed on the first flow guide surface are arranged in a connected manner on both sides, and the first groove is arranged to extend in the air flow direction.

10. An air management device in accordance with claim 9, wherein a curved surface protrusion is formed by protruding from the curved surface corresponding to the first and second grooves.

11. An air management device in accordance with claim 10, wherein the first protrusion and the curved surface protrusion have a predetermined length extending in the airflow direction, have a predetermined thickness up to a predetermined height based on the airflow direction, and have a width that becomes narrower toward the tip above a predetermined height.

12. An air management device according to any one of claims 8 to 11, wherein the protrusion spacing / bone spacing in the first protrusion and the first groove is ≥ 2, and the bone spacing is ≤ 0.11*blade length, wherein the blade length means the length in one section in which the blades are arranged cylindrically in the driving fan.

13. An air management device in accordance with claim 12, wherein the groove depth = projection height (H) * 0.66, and the fan diameter * 0.01 ≤ projection height = projection diameter ≤ fan diameter * 0.

02.

14. An air management device according to claim 13, wherein the draft angle of the protrusion is in the range of 15 to 20° and the radius of the protrusion tip is in the range of 0.3 to 0.5 mm.

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