Air conditioners

Abstract

To provide an air conditioner including a cross flow fan, a rear guider, a stabilizer, a front-surface heat exchanger, a rear-surface heat exchanger and a rear guider collar portion, in which increase in wind speed of air flow flowing through a collar reverse air duct composed of the rear surface side heat exchanger and the rear guider collar portion, and / or disturbance of the air flow can be suppressed.SOLUTION: In a collar reverse air duct 109 composed of a rear guider collar portion facing surface 110 and a rear-surface heat exchanger 104b, the distance between closest portions of the rear guider collar portion facing surface 110 and the rear-surface heat exchanger 104b is equal to or shorter than the distance between the rear guider collar portion facing surface 110 and the rear-surface heat exchanger 104b at a part upper than the closest part of the collar reverse air duct 109.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to an air conditioner having a main body with an air inlet and an outlet, a heat exchanger, a crossflow fan, a rear guider, and a stabilizer arranged opposite the rear guider, and relates to an air conditioner having a rear heat exchanger. [Background technology]

[0002] Generally, there is known an air conditioner having an indoor unit that forms an air supply circuit for circulating air inside a main casing having an intake port and an exhaust port, includes a crossflow fan in the air supply circuit, and has a heat exchanger disposed upstream of the crossflow fan, and the air sucked in from the intake port by the rotation of the crossflow fan is passed through the heat exchanger for heat exchange and then blown out from the exhaust port. A rear guider and a stabilizer are provided to form the air flow generated by the rotation of the crossflow fan.

[0003] Here, as an example of a conventional indoor unit, an air conditioner 1 disclosed in Patent Document 1 will be described with reference to FIG. 10. The air conditioner 1 has an air inlet 2 on the top surface of the main body and an air outlet 3 on the front surface of the main body. A cross-flow fan 4 is disposed in the center of the main body. A rear guider 5 is disposed behind the cross-flow fan 4, a stabilizer 6 is disposed opposite the rear guider 5, and a heat exchanger 7 is disposed to sandwich the rear guider 5, the stabilizer 6, and the cross-flow fan 4 from the front and rear. The heat exchanger 7 is composed of a front heat exchanger 7a and a rear heat exchanger 7b. The rear guider 5 has a rear guider flange 9 of uniform thickness above the water tray 8 for rectifying the air flowing into the cross-flow fan 4.

[0004] In the air conditioner 1 with the above configuration, when the cross-flow fan 4 is rotated, air flowing in from the intake port 2 on the top surface of the main body passes through the front heat exchanger 7a and the rear heat exchanger 7b. The heat-exchanged air passes through the cross-flow fan 4 and is blown out from the air outlet 3. At this time, the air that has passed through the lower part of the rear heat exchanger 7b, which is below the rear guider tip 9a, flows along the rear guider flange opposing surface 9b that faces the rear heat exchanger, and at the rear guider flange tip 9a, it merges with the air that has passed through the upper part of the rear heat exchanger 7b, which is above the rear guider tip 9a, and flows into the cross-flow fan 4. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Patent Publication No. 2015-55419 Summary of the Invention [Problem to be solved by the invention]

[0006] However, the shape of the rear guide flange is specified for the purpose of straightening the airflow on the crossflow fan side, and the airflow on the rear guide flange facing surface that faces the rear heat exchanger of the rear guide flange is not taken into consideration, and when the air that has passed through the rear heat exchanger passes through the brim back air passage formed between the rear heat exchanger and the rear guide flange facing surface, there is a risk of an increase in wind speed and turbulence, which may lead to a deterioration in airflow performance. For example, if there is a contraction part in which the air passage width is locally narrowed in the brim back air passage, there is a risk of an increase in wind speed in the contraction part, collision of airflow with the surface of the contraction part, and merging of airflows of different directions, which increases the ventilation resistance and deteriorates the airflow performance.

[0007] The present invention has been made in consideration of the above-mentioned conventional problems, and aims to provide an air conditioner that can suppress the increase in wind speed and airflow turbulence caused by the surface facing the rear guide flange when air that has passed through the rear heat exchanger flows through the rear-brim air duct. [Means for solving the problem]

[0008] The air conditioner of the present invention comprises a main body having an air intake and an exhaust, a front heat exchanger arranged on the front side inside the main body, a rear heat exchanger arranged on the rear side inside the main body, a crossflow fan, stabilizers and rear guiders arranged on the front and rear sides of the outer periphery of the crossflow fan to form an air passage, and a rear guide flange portion facing the rear heat exchanger on the rear guider, and is characterized in that in any cross section perpendicular to the longitudinal direction of the air conditioner of the brim back air passage formed by the rear guide flange portion facing surface, which is the surface facing the rear heat exchanger, and the rear heat exchanger, the distance between the closest point between the rear guide flange portion facing surface and the rear heat exchanger is equal to or shorter than the distance between the rear guide flange portion facing surface above the closest point of the brim back air passage and the rear heat exchanger.

[0009] This eliminates the contraction portion in the brim-back air passage, reducing turbulence of the airflow. Furthermore, the gradual expansion of the brim-back air passage prevents an increase in the wind speed of the airflow flowing through the brim-back air passage. Effect of the Invention

[0010] The airflow in the rear brim air passage flowing toward the tip of the rear guider brim is rectified, improving the airflow performance. Furthermore, the airflow resistance can be reduced by suppressing the increase in the wind speed of the airflow in the rear brim air passage, improving the airflow performance. [Brief description of the drawings]

[0011] [Figure 1] FIG. 1 is a cross-sectional view showing an example of the configuration of an air conditioner according to a first embodiment of the present invention. [Diagram 2] FIG. 1 is an enlarged cross-sectional view of a rear guide flange portion 106a and its periphery as an example of the configuration of an air conditioner according to embodiment 1 of the present invention. [Diagram 3] FIG. 11 is a perspective view showing an example of the configuration of a rear guide flange portion facing surface 110 according to a second embodiment of the present invention; [Figure 4]FIG. 11 is an enlarged cross-sectional view of a portion of a rear guide flange portion facing surface 110 according to a second embodiment of the present invention. [Diagram 5] FIG. 11 is a perspective view showing an example of a configuration of a rear guide flange portion facing surface 110 according to a third embodiment of the present invention. [Figure 6] FIG. 11 is an enlarged cross-sectional view of a portion of a rear guide flange portion facing surface 110 according to a third embodiment of the present invention. [Figure 7] FIG. 11 is a perspective view showing an example of the configuration of a rear guide flange portion facing surface 110 according to a fourth embodiment of the present invention. [Figure 8] FIG. 13 is a perspective view showing an example of the configuration of a rear guide flange portion facing surface 110 according to a fifth embodiment of the present invention. [Figure 9] FIG. 13 is a perspective view showing an example of the configuration of a rear guide flange portion facing surface 110 according to a sixth embodiment of the present invention. [Figure 10] Cross-sectional view of the air conditioner according to Patent Document 1 DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] The first invention is an air conditioner comprising a main body having an air intake and an exhaust, a front heat exchanger arranged on the front side inside the main body, a rear heat exchanger arranged on the rear side inside the main body, a crossflow fan, stabilizers and rear guiders arranged on the front and rear sides of the outer periphery of the crossflow fan to form an air passage, and a rear guide flange portion facing the rear heat exchanger on the rear guider, wherein in any cross section perpendicular to the longitudinal direction of the air conditioner of the brim back air passage formed by the rear guide flange portion facing surface, which is the surface facing the rear heat exchanger, and the rear heat exchanger, the distance between the closest point between the rear guide flange portion facing surface and the rear heat exchanger is equal to or shorter than the distance between the rear guide flange portion facing surface and the rear heat exchanger above the closest point of the brim back air passage.

[0013] This eliminates the contraction portion where the air passage width is locally narrowed in the brim rear air passage, reduces the turbulence of the air flow, and improves the airflow performance by rectifying the airflow flowing toward the tip of the rear guide brim. Furthermore, the gradual expansion of the brim rear air passage suppresses the increase in the wind speed of the airflow flowing through the brim rear air passage, reducing the ventilation resistance in the brim rear air passage and improving the airflow performance.

[0014] The second invention is particularly characterized in that in the air conditioner of the first invention, the brim back air duct is such that LC≧LB≧LA is satisfied when the distance between the rear heat exchanger and point A on the rear guide brim facing surface that is closest to the tip where the distance between the rear guide brim and the crossflow fan is shortest is LA, the distance between the rear heat exchanger and any point B above point A on the rear guide brim facing surface and below the tip of the rear guide brim is LB, and the distance between the rear heat exchanger and any point C above point B on the rear guide brim facing surface and below the tip of the rear guide brim is LC.

[0015] This eliminates the contraction section in the brim rear air passage, reduces turbulence of the airflow, and straightens the airflow flowing toward the tip of the rear guider brim, improving the airflow performance. Furthermore, the gradual expansion of the brim rear air passage suppresses an increase in the wind speed of the airflow flowing through the brim rear air passage, reducing the ventilation resistance in the brim rear air passage and improving the airflow performance.

[0016] The third invention is particularly characterized in that, in the air conditioner of the first or second invention, the behind-the-brim air duct satisfies LA≧LE≧LD, where LD is the distance between the intersection D of the rear guide brim portion and the water tray and the rear heat exchanger, and LE is the distance between an arbitrary point E on the opposing surface of the rear guide brim portion that is above the point D and below LA and the rear heat exchanger.

[0017] According to this, there is no contraction section in the brim rear air passage, the turbulence of the air flow is reduced, and the air flow flowing toward the tip of the rear guide brim is rectified, improving the airflow performance. Furthermore, the gradual expansion of the brim rear air passage suppresses the increase in the wind speed of the air flow flowing through the brim rear air passage, reducing the ventilation resistance in the brim rear air passage and improving the airflow performance. In addition, the increase in wind speed and the turbulence of the air flow are suppressed at the point where the brim rear air passage formed by the rear guide brim facing surface and the rear heat exchanger becomes narrower, further improving the airflow performance.

[0018] A fourth aspect of the present invention is particularly characterized in that in the air conditioner of any one of the first to third aspects of the present invention, the surface facing the rear guide flange portion has a substantially flat shape.

[0019] This eliminates the contraction section in the rear-of-the-brim air passage, reduces airflow turbulence, and straightens the airflow flowing toward the tip of the rear guide brim, thereby improving air blowing performance.

[0020] A fifth aspect of the present invention is particularly characterized in that, in the air conditioner of any one of the first to fourth aspects of the present invention, the surface facing the rear guide flange has one or a plurality of convex portions.

[0021] According to this, a turbulent region is generated around the convex portion, which reduces frictional resistance around the convex portion, thereby reducing ventilation resistance in the air passage behind the brim and improving ventilation performance.

[0022] A sixth aspect of the present invention is particularly characterized in that, in the air conditioner of any one of the first to fourth aspects of the present invention, the surface facing the rear guide flange has one or a plurality of recesses.

[0023] According to this, a turbulent region is generated around the recess, which reduces frictional resistance around the recess, thereby reducing ventilation resistance in the air passage behind the brim and improving ventilation performance.

[0024] Hereinafter, each embodiment of the present invention will be described in detail with reference to the drawings. Note that each embodiment described below is merely an example, and the present invention is not limited to each embodiment.

[0025] (Embodiment 1) FIG. 1 is a cross-sectional view showing an example of the configuration of an air conditioner 100 according to this embodiment, and FIG. 2 is an enlarged cross-sectional view of the periphery of a rear guide flange 106a of the air conditioner 100. As shown in FIG.

[0026] As shown in FIG. 1, the air conditioner 100 has a main body having an air inlet 101 arranged on the top surface of the main body and an outlet 102 arranged on the front of the main body, a heat exchanger 104 that exchanges heat with the air taken in through the inlet 101, a crossflow fan 103 that exchanges heat in the heat exchanger 104 and generates an airflow to be blown out from the outlet 102, a rear guider 106 arranged downstream of the crossflow fan 103 and guides the air flow to the outlet 102, and a stabilizer 105 arranged opposite the rear guider 106, with the heat exchanger 104 arranged to sandwich the stabilizer 105, the rear guider 106, and the crossflow fan 103 from the front and rear, and the heat exchanger 104 is composed of a front heat exchanger 104a and a rear heat exchanger 104b. A rear guider flange portion 106 a is formed at the upper end portion of the rear guider 106 to straighten the air flowing into the cross flow fan 103 above the water receiving tray 107 .

[0027] 2, rear guide flange 106a is disposed so as to be sandwiched between rear heat exchanger 104b and crossflow fan 103, and has tip 108 at which the distance between rear guide flange 106a and crossflow fan 103 is shortest, and the lower end of rear heat exchanger 104b is disposed below tip 108. The surface of rear guide flange 106a facing rear heat exchanger 104b is rear guide flange facing surface 110, and in this embodiment, rear guide flange facing surface 110 has a substantially flat shape, but may also have a spherical concave shape, a spherical convex shape, a shape with a step so that brim back air passage 109 widens toward rear guide flange tip 106b, or the like.

[0028] The rear guide flange facing surface 110 and the rear heat exchanger 104b form the flange back air passage 109, and the part where the distance between the rear guide flange facing surface 110 and the rear heat exchanger 104b is the shortest is the closest part between the rear guide flange facing surface and the rear heat exchanger. The distance between the rear guide flange facing surface 110 and the rear heat exchanger 104b at the closest part is arranged to be equal to or shorter than the distance between the rear guide flange facing surface 110 and the rear heat exchanger 104b above the closest part of the flange back air passage 109.

[0029] Specifically, the brim back air passage 109 is arranged so that LC≧LB≧LA≧LE≧LD is satisfied when the distance between point A on the rear guide flange facing surface 110 closest to the tip 108 and the rear heat exchanger 104b is LA, the distance between an arbitrary point B above point A on the rear guide flange facing surface 110 and below the rear guide flange tip 106b and the rear heat exchanger 104b is LB, the distance between an arbitrary point C above point B on the rear guide flange facing surface 110 and below the rear guide flange tip 106b and the rear heat exchanger 104b is LC, the distance between the intersection D of the rear guide flange 106a and the water tray 107 and the rear heat exchanger 104b is LD, and the distance between an arbitrary point E above point D on the rear guide flange facing surface 110 and below point A and the rear heat exchanger 104b is LE.

[0030] This eliminates the narrowing of the air passage width locally in brim behind air passage 109, thereby reducing turbulence of the airflow. Furthermore, by gradually expanding brim behind air passage 109, an increase in the wind speed of the airflow flowing through brim behind air passage 109 is suppressed.

[0031] The airflow performance is improved by rectifying the airflow flowing toward the rear guide flange tip 106b in the flange back air passage 109. Furthermore, the ventilation resistance can be reduced by suppressing the increase in the wind speed of the airflow flowing in the flange back air passage 109, thereby improving the airflow performance.

[0032] (Embodiment 2) Fig. 3 is a perspective view showing an example of the configuration of rear guide flange portion facing surface 110 according to this embodiment. Fig. 4 is an enlarged cross-sectional view of a part of rear guide flange portion facing surface 110 shown in Fig. 3. In Figs. 3 and 4, elements common to the first embodiment are denoted by the same reference numerals.

[0033] As shown in Fig. 3, the rear guide flange-facing surface 110 has a plurality of protrusions 111 on its surface. As shown in Fig. 4, small turbulent eddies are generated behind the protrusions 111, which suppress the separation of the airflow flowing through the flange-back air passage 109 from the surface of the rear guide flange-facing surface 110, reducing the frictional resistance on the surface of the rear guide flange-facing surface 110, reducing the ventilation resistance in the flange-back air passage 109, and improving the air blowing performance. In this embodiment, the shape of the protrusions 111 is a circular hill, but it may be a cone, a triangular pyramid, a rectangle, or the like. In this embodiment, the protrusions 111 are arranged in a parallel arrangement, but they may be arranged in a staggered arrangement, a random arrangement, or the like.

[0034] (Embodiment 3) Fig. 5 is a perspective view showing an example of the configuration of rear guide flange portion facing surface 110 according to this embodiment. Fig. 6 is an enlarged cross-sectional view of a part of rear guide flange portion facing surface 110 shown in Fig. 5. In Figs. 5 and 6, common reference numerals are used for elements common to the first embodiment.

[0035] As shown in Fig. 5, the rear guide flange-facing surface 110 has a plurality of recesses 112 on its surface. As shown in Fig. 6, small turbulent eddies are generated behind the recesses 112, which suppresses the separation of the airflow flowing through the flange-back air passage 109 from the surface of the rear guide flange-facing surface 110, reduces the frictional resistance on the surface of the rear guide flange-facing surface 110, reduces the ventilation resistance in the flange-back air passage 109, and improves the air blowing performance. In this embodiment, the shape of the recesses 112 is approximately spherical, but may be conical, triangular pyramidal, rectangular, or the like. In this embodiment, the recesses 112 are arranged in parallel, but may be arranged in a staggered pattern, random pattern, or the like.

[0036] (Embodiment 4) Fig. 7 is a perspective view showing an example of the configuration of the rear guide flange portion opposing surface 110 according to this embodiment. In Fig. 7, elements common to the first embodiment are denoted by the same reference numerals.

[0037] 7, rear guide flange portion opposing surface 110 has a plurality of slits 113 on its surface that are parallel to the rotation axis of cross flow fan 103 as an alternative form of recess 112. This makes it possible to prevent defects in the resin molding, such as sink marks, when rear guide flange portion 106a is produced by resin molding.

[0038] (Embodiment 5) Fig. 8 is a perspective view showing an example of the configuration of the rear guide flange portion opposing surface 110 according to this embodiment. In Fig. 8, elements common to the first embodiment are denoted by the same reference numerals.

[0039] 8, rear guide flange facing surface 110 has a plurality of slits 113 on its surface that are perpendicular to the rotation axis of cross flow fan 103 as an alternative form of recess 112. This makes it possible to prevent defects in the resin molding such as sink marks when producing rear guide flange 106a by resin molding. Also, the length of slits 113 is relatively short, improving workability such as cutting when producing a molding die.

[0040] (Embodiment 6) Fig. 9 is a perspective view showing an example of the configuration of the rear guide flange portion opposing surface 110 according to this embodiment. In Fig. 9, elements common to the first embodiment are denoted by the same reference numerals.

[0041] 9, multiple ribs 114 are provided on the surface of rear guide flange portion opposing surface 110 as an alternative form of protrusion 111. This makes it possible to reinforce rear guide flange portion 106a and prevent rear guide flange portion 106a from vibrating due to the impact of airflow collisions or motor vibrations during operation, thereby enabling stable air blowing performance to be achieved. [Industrial Applicability]

[0042] The air conditioner according to the present invention is suitable for use in domestic and commercial air conditioning because it can improve air blowing performance by regulating the airflow flowing through the brim-rear air duct and reducing the ventilation resistance in the brim-rear air duct. [Explanation of symbols]

[0043] 100 Air conditioner 101 Intake port 102 Air outlet 103 Crossflow fan 104 Heat exchanger 104a Front heat exchanger 104b Rear heat exchanger 105 Stabilizer 106 Rear Guider 106a Rear guide flange 106b Rear guide flange tip 107 Water tray 108 Tip 109 Brim Back Airway 110 Rear guide flange facing surface 111 Convex 112 Recess 113 Slit 114 Ribs

Claims

1. A main body having an air inlet and an air outlet; A front heat exchanger disposed on a front side inside the main body; A rear heat exchanger disposed on a rear side inside the main body; A crossflow fan, a stabilizer and a rear guider disposed on the front and rear sides of an outer periphery of the cross flow fan to form an air passage; a rear guide flange portion facing the rear heat exchanger in the rear guider; Equipped with the rear guide flange portion has a tip end portion that is the shortest distance from the cross flow fan, and a lower end of the rear heat exchanger is disposed below the tip end portion, In any cross section perpendicular to the longitudinal direction of the air conditioner of the brim back air passage formed by the rear guide flange portion facing surface, which is the surface facing the rear heat exchanger, and the rear heat exchanger, the rear guide flange portion facing surface has a closest point where the rear guide flange portion facing surface and the rear heat exchanger are closest, and the distance between the rear guide flange portion facing surface and the rear heat exchanger is configured to be the same or gradually smaller from the tip of the rear guide flange portion to the closest point, The air conditioner is characterized in that the surface facing the rear guide flange is provided with a recess that is approximately spherical, conical, triangular pyramid or rectangular.

2. The air conditioner described in claim 1, characterized in that when the distance between the rear heat exchanger and point A on the opposing surface of the rear guide flange that is closest to the tip where the distance between the rear guide flange and the crossflow fan is shortest is LA, the distance between the rear heat exchanger and an arbitrary point B above point A on the opposing surface of the rear guide flange and below the tip of the rear guide flange is LB, and the distance between the rear heat exchanger and an arbitrary point C above point B on the opposing surface of the rear guide flange and below the tip of the rear guide flange is LC, LC≧LB≧LA.

3. The air conditioner described in claim 1 or 2, characterized in that when the distance between the rear heat exchanger and point A on the opposing surface of the rear guide flange that is closest to the tip where the distance between the rear guide flange and the crossflow fan is shortest is LA, the distance between the intersection D of the rear guide flange and the water tray is LD, and the distance between the rear heat exchanger and any point E above point D and below point A on the opposing surface of the rear guide flange is LE, LA ≧ LE ≧ LD.

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