Air conditioner

Abstract

To provide an air conditioner which effectively inhibits short circuits and can stabilize air blown out from an air outlet.SOLUTION: An air conditioner includes: an indoor unit housing including an air inlet, an air outlet, and an air passage connecting the air inlet with the air outlet and having a lateral direction set to a longitudinal direction; a fan; and a vertical wind direction plate which is disposed in the air outlet and changes a direction of air blown from the air outlet to a vertical direction. The air passage located between the fan and the air outlet includes an upper wall located at the upper side in the vertical direction. The upper wall has: a first wall which extends so as to lower vertically in a direction from the back in a front-back direction toward the front; a second wall which is located at the front relative to the first wall and extends so as to rise vertically in a direction from the back in the front-back direction toward the front; and a protruding part located between the first wall and the second wall. The protruding part protrudes downward in the vertical direction relative to a front end of the first wall and a rear end of the second wall.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The following disclosure relates to an air conditioner. [Background technology]

[0002] Air conditioners generally have an air intake at the top front of the indoor unit housing and an air outlet at the bottom front, but a phenomenon called short circuiting can occur, in which the air blown out from the air outlet is immediately sucked back into the air intake.When short circuiting occurs, the air blown out for air conditioning returns, so various methods have been developed to suppress short circuiting (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2014-055684 Summary of the Invention [Problem to be solved by the invention]

[0004] The air passage of an air conditioner has the role of stabilizing the air blown out from the air outlet. However, in the air conditioner of Patent Document 1, the air passage in front of (downstream of) the protruding part cannot be effectively utilized. Therefore, there is room for improvement in stabilizing the air blown out from the air outlet while effectively suppressing short circuiting.

[0005] An object of the present disclosure is to provide an air conditioner that can effectively suppress short circuits and stabilize the air blown out from the air outlet. [Means for solving the problem]

[0006] The air conditioner of the present disclosure comprises an indoor unit casing having an intake port, an exhaust port, and an air passage connecting the intake port and the exhaust port, the longitudinal direction of the indoor unit casing being in the left-right direction; a fan arranged in the air passage and circulating air drawn in through the intake port toward the exhaust port; and upper and lower air deflectors arranged at the exhaust port and changing the direction of air blown out from the exhaust port in an up-down direction, the air passage between the fan and the exhaust port including an upper wall located on the upper side in the up-down direction, the upper wall having a first wall extending from the rear side to the front side in the front-to-back direction so as to be located on the lower side in the up-down direction, a second wall located further forward than the first wall and extending from the rear side to the front side in the front-to-back direction so as to be located on the upper side in the up-to-down direction, and a convex portion located between the first wall and the second wall, the convex portion protruding downward in the up-to-down direction further than the front end of the first wall and the rear end of the second wall. [Effects of the Invention]

[0007] According to the present disclosure, it is possible to provide an air conditioner that can effectively suppress short circuits and stabilize the air blown out from the air outlet. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a perspective view showing a simplified appearance of an air conditioner 1. FIG. [Figure 2] FIG. 1 is a front view showing a simplified appearance of an air conditioner 1. [Figure 3] FIG. 2 is a bottom view showing a simplified external view of the air conditioner 1. [Figure 4A] 1 is a cross-sectional view (cross-sectional view taken along line EE') that schematically illustrates the internal structure of the air conditioner 1. FIG. [Figure 4B] 1 is a cross-sectional view (cross-sectional view taken along line FF') that schematically illustrates the internal structure of the air conditioner 1. FIG. [Figure 4C] 1 is a cross-sectional view (cross-sectional view taken along line GG') that schematically illustrates the internal structure of the air conditioner 1. FIG. [Figure 5A]FIG. 4B is an enlarged schematic view of the encircled area in FIG. 4A, conceptually illustrating the air flow in the downward blowing position. [Figure 5B] FIG. 4B is an enlarged schematic diagram of the encircled area in FIG. 4A, conceptually illustrating the air flow in the upward blowing position. [Figure 6] FIG. 4B is an enlarged schematic diagram of the area around the circle in FIG. 4A. [Figure 7] FIG. 4B is an enlarged schematic diagram of the area around the circle in FIG. 4A. [Figure 8] FIG. 4B is a schematic enlarged view of a part near the circled part in FIG. 4A. [Figure 9A] FIG. 10 is a schematic perspective view showing an enlarged view of an air outlet 5 in an air conditioner 1 of a third embodiment with an upper and lower air direction vane 7 removed. [Figure 9B] FIG. 9B is a schematic cross-sectional view of the circled portion B in FIG. 9A. [Figure 9C] FIG. 9B is a cross-sectional view of the circled portion C2 in FIG. 9A. [Figure 10] 10 is a cross-sectional view schematically illustrating the internal structure near an upper wall 60 of an air conditioner 1 according to a fourth embodiment. FIG. [Figure 11] 1 is a perspective view showing a simplified appearance of an air conditioner 1. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0009] Hereinafter, an embodiment of an air conditioner according to the present disclosure will be described with reference to the drawings. The present disclosure is not limited to the contents described in the following embodiments, and appropriate design changes can be made within the scope of the configuration of the present disclosure. In the drawings, identical or equivalent elements are given the same reference numerals, and redundant explanations will be omitted. Only the main parts are shown in the drawings. The following description will focus on the main parts and parts related to the present disclosure.

[0010] In this specification, when two lines or planes are "parallel," it means that the angle (absolute value) they form is within the range of 0°±3°. When two lines or planes are "orthogonal" (and "perpendicular"), it means that the angle (absolute value) they form is within the range of 90°±3°.

[0011] The terms "upstream side" and "downstream side" refer to the upstream side and downstream side, respectively, in the direction of air flow. For example, in an air passage connecting an air inlet and an air outlet, the air inlet side is the "upstream side" and the air outlet side is the "downstream side."

[0012] In the following embodiment, a so-called split-type (also called separate-type) air conditioner having an indoor unit and an outdoor unit will be described as an example, and the indoor unit will be called the air conditioner.

[0013] (Embodiment 1) The air conditioner 1 includes an indoor unit housing 2 (see FIG. 1). The surface of the indoor unit housing 2 that serves as the installation surface when the indoor unit housing 2 is installed on a wall, ceiling, or the like is referred to as the back surface 3. Of the two directions that make up the back surface 3, the height direction of the indoor unit housing 2 is referred to as the Z direction (up-down direction; Z1-Z2), and the width direction of the indoor unit housing 2 is referred to as the X direction (left-right direction; X1-X2). The direction perpendicular to the back surface 3 is referred to as the Y direction (front-back direction; Y1-Y2). For example, if the indoor unit housing 2 that is elongated in the horizontal direction is installed on a vertical wall, the vertical direction corresponds to the Z direction, the longitudinal direction of the indoor unit housing 2 corresponds to the X direction, and the direction perpendicular to the Z direction and the X direction corresponds to the Y direction.

[0014] 1 to 3 are schematic diagrams showing the appearance of air conditioner 1 of this embodiment, with FIG. 1 being a perspective view, FIG. 2 being a front view, and FIG. 3 being a bottom view. FIGS. 4A to 4C are schematic cross-sectional views showing the internal structure of air conditioner 1 of this embodiment, with FIG. 4A being a cross-sectional view taken along line E-E' in FIG. 2 (E-E' cross-sectional view), FIG. 4B being a cross-sectional view taken along line F-F' in FIG. 2 (F-F' cross-sectional view), and FIG. 4C being a cross-sectional view taken along line G-G' in FIG. 2 (G-G' cross-sectional view). FIGS. 4A to 4C are cross-sectional views as viewed from the right side (X1 side) of FIG. 2. Line F-F' in Figure 2 represents the portion of the indoor unit housing 2 located at the left-right center a of the protrusion 10 extending in the left-right direction X, and line E-E' and line G-G' represent portions that are a certain distance away from that portion to the right (X1 side) or left (X2 side), respectively.

[0015] The indoor unit casing 2 is shaped, for example, like a rectangular parallelepiped, with its longitudinal axis extending in the left-right direction X. The indoor unit casing 2 has an air inlet 4 for drawing in air, an air outlet 5 for blowing out air, an air passage 6 connecting the air inlet 4 and the air outlet 5, and a rear surface 3 that serves as the installation surface. For example, the air inlet 4 is provided on the top surface or the like of the indoor unit casing 2, the air outlet 5 is provided on the front surface (preferably the lower front surface) of the indoor unit casing 2, and the air passage 6 is provided inside the indoor unit casing 2.

[0016] A front cover 21 is detachably attached to the front surface of the indoor unit housing 2. The shape of the front cover 21 is, for example, a flat plate, and the width of the front cover 21 in the left-right direction X is approximately equal to the width of the indoor unit housing 2 in the left-right direction X. The shape of the indoor unit housing 2 below the front cover 21 (Z2 side) is preferably a shape that recedes in an arc shape in side view and reaches the bottom wall portion (see FIGS. 4A to 4C). The air outlet 5 is preferably provided below the front cover 21.

[0017] An up-and-down air deflector 7 is arranged at the air outlet 5. The up-and-down air deflector 7 is also called an up-and-down air direction louver, and changes the direction of air blown out from the air outlet 5 in the up-and-down direction Z, and is provided so as to be pivotable open and closed relative to the air outlet 5. For example, the up-and-down air deflector 7 is attached to the air outlet 5 via a shaft 73 so as to be pivotable open and closed. The air outlet 5 may further be provided with a left-right air deflector that can swing open and close and change the direction of the air in the left-right direction X. The position of the air conditioner 1 when the air outlet 5 is fully closed by the up-and-down air deflector 7 (i.e., when operation is stopped) is referred to as the closed position, and the position of the air conditioner 1 after operation has started is referred to as the open position.

[0018] The vertical air direction vane 7 has a front surface 72 and a back surface 71 opposite the front surface 72, and when the air conditioner 1 is not operating, the front surface 72 is exposed to the outside to close at least a part of the air outlet 5. The shape of the vertical air direction vane 7 is preferably flat, but its front and back surfaces may correspond to the front surface 72 and back surface 71, respectively. The width of the vertical air direction vane 7 in the left-right direction X is smaller than the width of the indoor unit housing 2 in the left-right direction X (see FIG. 2). Furthermore, the width of the vertical air direction vane 7 in the up-down direction Z is smaller than the width of the indoor unit housing 2 in the up-down direction Z (see FIG. 2).

[0019] During fan operation after the air conditioner 1 starts operating, the vertical air deflectors 7 collide with the air blown out from the air outlet 5, controlling the direction of the air blown out. Specifically, the vertical air deflectors 7 can be rotated from a closed position to an upward blowing position where air is blown upward (toward the Z1 side) and then to a forward blowing position where air is blown out forward (toward the Y1 side) by rotating the upper end 74 of the vertical air deflectors 7 forward (toward the Y1 side) around the shaft 73. When the upper end 74 of the vertical air deflectors 7 is further rotated downward (toward the Z2 side) from the forward blowing position, the vertical air deflectors 7 assume a downward blowing position where air is blown diagonally downward using the rear surface 71 of the vertical air deflectors 7. In this way, the vertical air deflectors 7 can be rotated open and closed between the closed position and the downward blowing position. The upward blowing position, the forward blowing position, and the downward blowing position are all included in the open position.

[0020] The upper end 74 of the vertical air direction flare 7 is the upper end (Z1 side) of the surface 72 of the vertical air direction flare 7 in the closed position, and corresponds to the downstream tip of the vertical air direction flare 7. The lower end 75 of the vertical air direction flare 7 is the lower end (Z2 side) of the surface 72 of the vertical air direction flare 7 in the closed position, and corresponds to the upstream tip of the vertical air direction flare 7. In the upward blowing position, the back surface 71 of the vertical air direction flare 7 mainly functions as an airflow guide wall through which air flows from the air outlet 5 to the outside. In the forward blowing position, both the front surface 72 and the back surface 71 of the vertical air direction flare 7 mainly function as airflow guide walls through which air flows from the air outlet 5 to the outside. In the downward blowing position, the front surface 72 of the vertical air direction flare 7 mainly functions as an airflow guide wall through which air flows from the air outlet 5 to the outside. On the other hand, when the air conditioner 1 is stopped, the upper and lower air direction flare 7 exposes the surface 72 to the outside and closes at least a portion of the air outlet 5.

[0021] The air passage 6 is a passage through which air flows from the air inlet 4 to the air outlet 5, and in the air passage 6, a filter 61, an indoor heat exchanger 62, a fan 63, and the like are arranged in this order from the upstream side. The indoor heat exchanger 62 functions as a condenser during heating operation and as an evaporator during cooling operation. The fan 63 has the function of circulating the air drawn in from the air inlet 4 toward the air outlet 5, and is preferably a cross-flow fan, for example. The indoor unit housing 2 also has a drive motor (not shown) that drives the fan 63, and the portion including the fan 63 and the drive motor is also referred to as the air blower.

[0022] The air passage 6 is configured to include an upper wall 60 located on the upper side (Z1 side) in the vertical direction. More specifically, as shown in FIGS. 4A to 4C , the downstream side of the fan 63 in the air passage 6 is configured with a rear guider 64 facing the rear of and below the fan 63, the upper wall 60 located above the air passage 6 and extending forward from a stabilizer 65 arranged in front of the fan 63, and both end walls (not shown) of the indoor unit housing 2. In the downstream side of the fan 63 in the air passage 6, the air blown from the fan 63 is guided to the air outlet 5 along the upper wall 60, the rear guider 64, and both end walls (not shown) of the indoor unit housing 2. The rear guider 64 functions as an airflow guide wall from the rear side (Y2 side) of the fan 63 to the lower wall of the air outlet 5, and the upper wall 60 (stabilizer, etc.) can function as an airflow guide wall from the front side (Y1 side) of the fan 63 to the air outlet 5.

[0023] The upper wall 60 includes a first wall 11 extending from the rear side (Y2 side) in the front-rear direction to the front side (Y1 side) so as to be positioned on the lower side (Z2) in the up-down direction, a second wall 12 extending from the rear side (Y2 side) in the front-rear direction to the front side (Y1 side) so as to be positioned on the upper side (Z1) in the up-down direction, and a protrusion 10 positioned between the first wall 11 and the second wall 12 (see FIG. 1 ). The first wall 11 is positioned upstream of the second wall 12. That is, the upper wall 60 has the first wall 11, the protrusion 10, and the second wall 12, in this order from the upstream side. The air passage 6 may include a basic air passage wall surface 13 upstream of the first wall 11 and downstream of the fan 63, the basic air passage wall surface 13 having an inclination angle different from that of the first wall 11. The basic air-passage wall surface 13 also slopes downward (Z2) in the up-down direction from the rear side (Y2 side) in the front-rear direction to the front side (Y1 side).

[0024] The acute angle θ that the second wall 12 makes with the front-rear direction Y 12 From the viewpoint of increasing the air blowing efficiency, the angle is preferably, for example, 0.1 to 15 degrees. The horizontal direction corresponds to the front-rear direction (the Y direction in FIGS. 4A to 4C).

[0025] The protrusion 10 is located between the first wall 11 and the second wall 12, and protrudes downward (toward the Z2 side) in the up-down direction further than a front end 101 of the first wall 11 and a rear end 102 of the second wall 12. Here, in a side view (for example, from the X2 side), a surface of the protrusion 10 extending downward (toward the Z2 side) from the front end 101 of the first wall 11 toward the apex (the most protruding part) of the protrusion 10 is referred to as a first surface 110, and a surface extending downward (toward the Z2 side) from the rear end 102 of the second wall toward the apex of the protrusion 10 is referred to as a second surface 120 (for example, see FIG. 6 described later). Therefore, the protrusion 10 has a first surface 110 extending downward from the front end 101 of the first wall 11 toward the apex of the protrusion 10, and a second surface 120 extending downward from the rear end 102 of the second wall 12 toward the apex of the protrusion 10. It can also be said that the front end 101 of the first wall 11 and the rear end 102 of the second wall 12 are the boundary between the first wall 11 and the protrusion 10, and the boundary between the second wall 12 and the protrusion 10, respectively. Note that the first surface 110 and the second surface 120 are preferably not curved in side view, and are more preferably linear in side view.

[0026] The protrusions 10 are arranged at the air outlet 5 so as to extend in the left-right direction X (see FIG. 1). Preferably, the protrusions 10 are arranged parallel to the longitudinal direction of the vertical airflow direction flap 7 (left-right direction X).

[0027] The upper wall 60 constituting the air passage 6 includes the first wall 11 and the second wall 12, creating a gentle elevation difference (also referred to as a step) in the air passage 6. In this case, the airflow along the first wall 11 from the upstream side is blocked by the convex portion 10, suppressing the upward airflow (i.e., forming a vortex beyond the convex portion 10). On the other hand, when the vertical air direction flap 7 is in the upward blowing position, the airflow along the second wall 12 can be reformed downstream beyond the convex portion 10. This suppresses short-circuiting and stabilizes the air blown out from the air outlet 5 (see FIGS. 5A and 5B). In this way, the air conditioner 1 of this embodiment effectively suppresses short-circuiting, sufficiently suppresses airflow loss, and stabilizes the air blown out from the air outlet 5 without increasing the number of parts. 5A and 5B are enlarged schematic diagrams (side views from the X1 side) of the area circled in FIG. 4A, and FIG. 5A conceptually illustrates the air flow in the downward blowing position, while FIG. 5B conceptually illustrates the air flow in the upward blowing position.

[0028] The acute angle θ that the first surface 110 makes with the front-rear direction Y (horizontal direction) 110 is the acute angle θ that the first wall 11 makes with the front-rear direction Y. 11 is larger than (θ 110 >θ 11 ) This increases the effect of the step described above, promoting vortex formation and more effectively suppressing short circuiting. From the same perspective, it is preferable that the height of the front end 101 of the first wall 11 be 5 mm or less. The height of the front end 101 of the first wall 11 means the distance in the vertical direction Z between the bottom of the convex portion 10 and the front end 101 of the first wall 11.

[0029] The acute angle θ that the second surface 120 makes with the front-rear direction Y (horizontal direction) 120 is the acute angle θ that the first surface 110 makes with the front-rear direction Y. 110 It is preferable that it is larger than (θ 120 >θ 110) This increases the effect of the step, promoting vortex formation and more effectively suppressing short circuiting. Thus, the protrusion 10 includes a first surface 110 extending downward from the front end 101 of the first wall 11 toward the apex of the protrusion 10, and a second surface 120 extending downward from the rear end 102 of the second wall 12 toward the apex of the protrusion 10, and the second surface 120 forms an acute angle θ with the front-rear direction Y. 120 However, the acute angle θ that the first surface 110 makes with the front-rear direction Y 110 is one of the preferred embodiments of the air conditioner 1 of the present disclosure. 120 is preferably, for example, 60 degrees to 90 degrees. 120 The acute angle θ that the second wall 12 makes with the front-rear direction Y 12 It is preferable that it is larger than (θ 120 >θ 12 ).

[0030] The rear end 102 of the second wall 12 is preferably located higher (towards Z1) in the vertical direction Z than the front end 101 of the first wall. In other words, when the air conditioner 1 is viewed from the side, the position of the rear end 102 of the second wall 12 in the vertical direction Z is preferably higher than the position of the front end 101 of the first wall in the vertical direction Z. This further enhances the effect of the step described above.

[0031] (Embodiment 2) In the air conditioner 1 of the first embodiment, from the viewpoint of further suppressing short circuits, it is preferable that the shape of the protrusion 10 in a side view is not a V-shape (or U-shape) formed by the first surface 110 and the second surface 120, but a shape (such as a square shape) that includes an additional surface between the first surface 110 and the second surface 120. That is, it is preferable that the protrusion 10 has a first surface 110 that extends downward (toward the Z2 side) from the front end 101 of the first wall 11 toward the apex of the protrusion 10, a second surface 120 that extends downward (toward the Z2 side) from the rear end 102 of the second wall 12 toward the apex of the protrusion 10, and a third surface 130 that connects the first surface 110 and the second surface 120. This embodiment is similar to embodiment 1 except that the protrusion 10 further has a third surface 130 connecting the first surface 110 and the second surface 120, and therefore a description of the matters common to embodiment 1 will be omitted. The third surface 130 is a surface that extends from the rear side (Y2 side) in the front-to-rear direction to the front side (Y1) so as to be positioned lower in the up-down direction (Z2 side).

[0032] As shown in FIG. 6 (and FIG. 7), the protrusion 10 includes a first surface 110, a third surface 130, and a second surface 120, in this order from the upstream side. The protrusion 10 further includes a third surface 130 connecting the first surface 110 and the second surface 120, which facilitates the convergence of the airflow blown along the first wall 11 and the airflow blown along the first surface 110 of the protrusion 10 near the third surface 130. This further enhances the effect of the step described above, and particularly further stabilizes the air blown out from the air outlet 5. FIGS. 6 and 7 are enlarged schematic diagrams (side views from the X1 side) of the area circled in FIG. 4A (the upper wall 60). FIG. 7 illustrates the acute angles formed by each wall and surface with the horizontal direction Y.

[0033] The acute angle θ that the third surface 130 makes with the front-rear direction Y (horizontal direction) 130 is the acute angle θ that the first surface 110 makes with the front-rear direction Y. 110 It is preferable that it is smaller than (θ 110 >θ 130 ). Acute angle θ 110 and acute angle θ 130 The difference between (θ 110 -θ 130) is preferably, for example, 10 to 20 degrees. 110 -θ 130 corresponds to the angle α in Figure 8. This further promotes the reformation of the airflow along the second wall 12 downstream beyond the protrusion 10, thereby further stabilizing the air blown out from the air outlet 5 (see also Figure 5B). 130 The acute angle θ that the second surface 120 makes with the horizontal direction is 120 It is preferable that it is smaller than (θ 120 >θ 130 In particular, the acute angle θ that the third surface 130 makes with the front-rear direction Y (horizontal direction) 130 is the acute angle θ that the first wall 11 makes with the front-rear direction Y. 11 It is preferable that it is equal to (θ 130 =θ 11 ) The two angles being equal means that the difference between them is within ±3 degrees (preferably within ±1 degree). Figure 8 is an enlarged schematic diagram (side view from the X1 side) of a portion near the circled area in Figure 4A.

[0034] (Embodiment 3) In the air conditioner 1 of the first or second embodiment, the protrusion 10 is disposed at the air outlet 5 so as to extend in the left-right direction X, but for example, the first surface 110 of the protrusion 10 may have a portion where the acute angle A formed with the vertical direction Z by the first surface 110 at the left-right central portion a of the protrusion 10 is different. a is the acute angle A that the first surface 110 of at least one of the left and right side portions b of the protrusion 10 makes with the vertical direction Z. b is smaller than (A b >A a ) Except for this point, this embodiment is similar to embodiment 1 or 2, and therefore a description of the matters common to embodiment 1 or 2 will be omitted.

[0035] It is preferable that the height of the protrusion 10 is approximately equal along the left-right direction X. The height of the protrusion 10 means the distance in the up-down direction Z between the bottom of the protrusion and the uppermost part of the front end 101 of the first wall and the rear end 102 of the second wall.

[0036] The above acute angle Aa and the above acute angle A b As mentioned above, b >A a " relationship. When the heights of the convex portions 10 are the same, the air flow using the fan 63 such as a cross-flow fan differs in the left-right direction X of the air outlet 5, so it is thought that short circuiting is more likely to occur near the center part a in the left-right direction than near the side parts b in the left-right direction. In the air conditioner 1 of this embodiment, the acute angle A in the area where short circuiting is relatively likely to occur is a However, the above acute angle A b (See the portions indicated by the arrows in Figs. 9B and 9C described later.) This allows the air conditioner 1 of this embodiment to more efficiently suppress short circuiting and airflow loss. a and the above acute angle A b Even if a difference is made between them, it does not affect the external appearance of the air conditioner 1, and therefore does not impair the aesthetic appearance (see FIG. 9A described below).

[0037] At least one of the left and right side portions of the protrusion 10 refers to at least one of the right side portion b1 and the left side portion b2 in the left and right direction X of the protrusion 10. The right side portion b1 in the left and right direction X of the protrusion 10 refers to any portion located between a portion P1 that is a predetermined distance Q1 to the right (X1 side) from the left and right central portion a, and a portion further away in the right direction (X1 side) (for example, it may be the right end portion of the protrusion 10 in the left and right direction X). The left side portion b2 in the left and right direction X of the protrusion 10 refers to any portion located between a portion P2 that is a predetermined distance Q2 to the left (X2 side) from the left and right central portion a, and a portion further away in the left direction (X2 side) (for example, it may be the left end portion of the protrusion 10 in the left and right direction X). The predetermined distances Q1 and Q2 may be the same or different, and for example, if the distance along the left-right direction X from the left-right center a of the protrusion 10 to one left-right end is taken as 100%, then it is preferable that the distance be 5% or more and 50% or less, and more preferably 10% or more and 40% or less.

[0038] In this embodiment, the acute angle A ais the acute angle A that the first surface 110 at the right side of the protrusion 10 in the left-right direction X makes with the up-down direction Z. b1 and the acute angle A that the first surface 110 at the left side of the protrusion 10 in the left-right direction X makes with the up-down direction Z b2 (See FIGS. 9A to 9C.) The protrusion 10 is preferably formed at an acute angle A b1 and an acute angle A a and an acute angle A b2 and a portion (3) having an acute angle A along the left-right direction X. b1 and an acute angle A a and an acute angle A b2 It is more preferable that the moiety is composed of a moiety (3) having the following structure (provided that A b1 >A a And A b2 >A a ) Acute angle A b1 and acute angle A b2 may be the same as or different from each other.

[0039] Fig. 9A is an enlarged perspective view of the air outlet 5 of the air conditioner 1 of this embodiment with the upper and lower air direction vanes 7 removed. Fig. 9B is a cross-sectional view (cross-sectional view from the X1 side) of the circled portion B in Fig. 9A. Fig. 9C is a cross-sectional view (cross-sectional view from the X1 side) of the circled portion C2 in Fig. 9A. In Fig. 9A, the portion of the convex portion 10 indicated by the circled portion B corresponds to the above-mentioned portion (2), the portion of the convex portion 10 indicated by the circled portion C1 corresponds to the above-mentioned portion (1), and the portion of the convex portion 10 indicated by the circled portion C2 corresponds to the above-mentioned portion (3).

[0040] (Embodiment 4) In the air conditioner 1 of embodiment 1, 2 or 3, the upper and lower air deflectors 7 are provided at the air outlet 5 so as to be able to rotate open and closed, but it is preferable that the upper end 74 (downstream tip) of the upper and lower air deflectors 7 does not exceed the downstream tip 121 of the second wall 12, that is, the upper end 74 of the upper and lower air deflectors 7 is located upstream of the downstream tip 121 of the second wall 12. In this embodiment, the upper and lower air deflectors 7 are similar to embodiment 1, 2 or 3 except that they rotate so that their upper end 74 is located upstream of the downstream tip 121 of the second wall 12, and therefore a description of matters common to embodiment 1, 2 or 3 will be omitted.

[0041] FIG. 10 is a cross-sectional schematic diagram (side view from the X1 side) illustrating the internal structure of the air conditioner 1 of this embodiment near the upper wall 60. In FIG. 10, the curved dotted line represents the rotational path of the upper end 74 of the vertical air direction flap 7. In the upward blowing position, the second wall 12 assists in rectifying the airflow, enabling effective upward blowing. Furthermore, because the downstream end 121 of the second wall 12 is located downstream of the rotational path of the upper end 74 of the vertical air direction flap 7, the air conditioner 1 can more stably suppress short-circuiting. In the downward blowing position, the air flow blown upward along the second wall 12 is blocked, and a certain amount of space is secured by the second wall. Therefore, in this case as well, the air conditioner 1 can further suppress short-circuiting.

[0042] (Embodiment 5) In the air conditioner 1 of embodiment 1, 2, 3 or 4, the vertical airflow direction flare 7 may be provided with a sub-loover 8 extending in the left-right direction X. This embodiment is the same as embodiment 1, 2, 3 or 4 except that the vertical airflow direction flare 7 is provided with a sub-loover 8 extending in the left-right direction X, and therefore a description of matters common to embodiment 1, 2, 3 or 4 will be omitted.

[0043] The vertical airflow direction flare 7 includes sub-loubers 8 extending in the left-right direction X. That is, the sub-loubers 8 are arranged on the vertical airflow direction flare 7, extending in the left-right direction X. The sub-loubers 8 are preferably arranged parallel to the longitudinal direction of the vertical airflow direction flare 7 and the convex portions 10 (that is, the left-right direction X). In this case, it is preferable that the total length of the sub-loubers 8 along the left-right direction X is shorter than the total length of the convex portions 10 along the left-right direction X. That is, the vertical airflow direction flare 7 preferably has, along the left-right direction X, an area E1 where the sub-loubers 8 are provided, and an area E2 where the sub-loubers 8 are not provided.

[0044] The first surface 110 of the protrusion 10 in the region e1 corresponding to the region E1 where the sub-louver 8 is provided (i.e., the region located in the front-rear direction Y of the region E1) forms an acute angle A with the vertical direction Z. e1 is the acute angle A formed by the first surface 110 of the region e2 (i.e., the region located in the front-rear direction Y of the region E2) corresponding to the region E2 where the sub-louver 8 is not provided, with the vertical direction Z. e2 It is preferable that it is larger than (A e1 >A e2 In this way, the vertical airflow direction flap 7 is provided with the sub-louvers 8 extending in the left-right direction X, and the first surface 110 of the region e1 of the protrusion 10 corresponding to the region E1 where the sub-louvers 8 are provided forms an acute angle A with the vertical direction Z. e1 However, the first surface 110 of the area e2 corresponding to the area E2 where the sublouver 8 is not provided forms an acute angle A with the vertical direction Z. e2 is one of the preferred embodiments of the air conditioner 1 of the present disclosure.

[0045] As an example of the above-mentioned preferred aspect, in the air conditioner 1 of embodiment 3, the sub-louvers 8 are not provided in the region (region E2) of the convex portion 10 corresponding to the region (region e2) including the center portion a in the left-right direction, but the sub-louvers 8 are provided in a position (region E1) parallel to the region (region e1) including at least one of the left-right side portions b of the convex portion 10 (see FIG. 11). It is considered that short circuiting is more likely to occur near the center portion in the left-right direction than near the left-right side portions of the vertical airflow direction flap 7, but in this aspect, the acute angle A in the portion (region e2) where short circuiting is relatively likely to occur is small. e2 However, the above acute angle Ae1 This makes it possible to more efficiently suppress short circuiting and airflow loss. Fig. 11 is a perspective view showing a simplified external view of an air conditioner 1 according to an example of this embodiment.

[0046] Although the embodiments of the present disclosure have been described above, the present disclosure is not limited to the above embodiments and can be implemented in various forms without departing from the spirit of the present disclosure. Furthermore, the components disclosed in the above embodiments can be modified as appropriate. For example, some of the components shown in one embodiment may be added to the components of another embodiment, or some of the components shown in one embodiment may be deleted from the embodiment.

[0047] Furthermore, the drawings mainly show each component in a schematic manner to facilitate understanding of the invention, and the thickness, length, number, spacing, etc. of each component shown in the drawings may differ from the actual ones due to the convenience of creating the drawings. Furthermore, the configurations of each component shown in the above embodiment are merely examples and are not particularly limited, and it goes without saying that various modifications are possible within a scope that does not substantially deviate from the effects of the present disclosure. [Explanation of symbols]

[0048] 1: Air conditioner 2: Indoor unit housing 3: Back 4: Inlet 5:Air outlet 6: Air passage 7: Vertical wind direction plate 8: Subluba 10: Convex part 11: 1st wall 12:Second wall 13: Basic air duct wall surface 21: Front cover 60: Upper wall 61: Filter 62: Indoor heat exchanger 63: Fan 64: Rear Guider 65: Stabilizer 71: Back of the upper and lower air deflectors 72: Surface of the upper and lower wind deflectors 73: Shaft 74: Upper end of the upper and lower wind deflectors 75: Lower end of upper and lower wind deflectors 101: Front end of first wall 102: Rear end of second wall 110: First surface of the convex part 120: Second surface of the convex part 121: Downstream tip of the second wall 130: Third surface of the convex part

Claims

1. an indoor unit housing having an air inlet, an air outlet, and an air passage connecting the air inlet and the air outlet, the indoor unit housing having a longitudinal direction in the left-right direction; a fan disposed in the air passage and configured to circulate the air drawn in through the air inlet toward the air outlet; An upper and lower airflow direction plate is disposed at the air outlet and changes the direction of air blown out from the air outlet in an up and down direction, the air passage between the fan and the air outlet includes an upper wall located on an upper side in the up-down direction, the upper wall has a first wall extending from a rear side toward a front side in the front-to-rear direction so as to be positioned lower in the up-down direction, a second wall located forward of the first wall and extending from the rear side toward the front side in the front-to-rear direction so as to be positioned upper in the up-down direction, and a convex portion located between the first wall and the second wall, the protrusion protrudes downward in the up-down direction further than the front end of the first wall and the rear end of the second wall.

2. the protrusion includes a first surface extending downward from the front end of the first wall toward a top of the protrusion, and a second surface extending downward from the rear end of the second wall toward the top of the protrusion, The air conditioner according to claim 1 , wherein an acute angle formed by the second surface with the front-rear direction is larger than an acute angle formed by the first surface with the front-rear direction.

3. The air conditioner according to claim 1 , wherein the rear end of the second wall is located higher in the up-down direction than the front end of the first wall.

4. the protrusion has a first surface extending downward from the front end of the first wall toward a top of the protrusion, a second surface extending downward from the rear end of the second wall toward the top of the protrusion, and a third surface connecting the first surface and the second surface, The air conditioner according to claim 1 , wherein the third surface is a surface that extends from a rear side to a front side in the front-rear direction so as to be positioned lower in the up-down direction.

5. The air conditioner according to claim 4 , wherein an acute angle formed by the third surface with the front-rear direction is smaller than an acute angle formed by the first surface with the front-rear direction.

6. The air conditioner according to claim 4 , wherein an acute angle formed by the third surface with the front-rear direction is equal to an acute angle formed by the first wall with the front-rear direction.

7. 2. The air conditioner of claim 1, wherein the acute angle formed by the first surface at the left-right center of the convex portion with the vertical direction is smaller than the acute angle formed by the first surface at at least one of the left-right side portions of the convex portion with the vertical direction.

8. The vertical airflow direction vane includes a sub-loover extending in the left-right direction, An air conditioner as described in any one of claims 1 to 7, wherein the acute angle formed by the first surface of the convex portion in the area corresponding to the area where the sub-loover is provided and the vertical direction is larger than the acute angle formed by the first surface of the area corresponding to the area where the sub-loover is not provided and the vertical direction.

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