JP6137254B2 - Air conditioning indoor unit - Google Patents

Description

  The present invention relates to an air conditioning indoor unit.

  In recent years, for the purpose of further improving the comfort of the air-conditioned space, air conditioners that blow out blown air downward from the wall surface of the indoor unit and adjust the temperature along the wall and floor have become widespread. Yes. For example, in the air conditioner described in Patent Document 1 (Japanese Patent Application Laid-Open No. 2004-218894), two lateral louvers are arranged at the outlet, and when the heating operation is started, the two lateral louvers are directed toward the wall surface by the two lateral louvers. Conditioned air is sent obliquely downward. The conditioned air descends along the wall surface by the Coanda effect, circulates on the floor surface, and circulates in the room.

  However, in the air conditioner described in Patent Document 1, the conditioned air passing between the two lateral louvers diffuses forward from the lower end of the front lateral louver immediately after the air flows downward, so the rear downward airflow is reduced. There is a possibility that it cannot be generated sufficiently.

  The subject of this invention is providing the air-conditioning indoor unit which can suppress the spreading | diffusion of the back downward airflow, and can produce | generate a sufficient amount of back downward airflow.

The air conditioning indoor unit according to the first aspect of the present invention is a wall-mounted air conditioning indoor unit that is installed on the side wall of the air-conditioning target space and changes the direction of the blown air blown from the blowout port by a plurality of flaps, A front flap and a rear flap are provided. The front flap adjusts the wind direction of the blown air. The rear flap adjusts the air direction of the blown air at a position closer to the side wall than the front flap. The front flap has a first airflow surface. The first airflow surface causes the blown air to follow along the air passage space sandwiched between the rear flap and the front flap. The rear flap has a second airflow surface. The second airflow surface keeps the blown air along when the blown air passes through the air passage space. Moreover, when the front flap produces | generates the airflow which goes to the lower part of a side wall, its lower end is located below the lowest end of a blower outlet. Further, the rear flap takes a predetermined posture when generating an air flow toward the lower portion of the side wall. The predetermined posture is a posture in which the lower end of the self is positioned on the side wall side from the upper end and the airflow surface is inclined with respect to the vertical plane. The second airflow surface has a curved surface that swells forward in the predetermined posture. The radius of the curved surface is 200 mm or more.

  In this air conditioning indoor unit, the blown air passing through the air passage space sandwiched between the front flap and the rear flap is in a state where the front flap is prevented from spreading forward until it reaches below the lower end of the blowout port. When the air travels along the air passage space and leaves the air passage space, the air flow along the second air flow surface of the rear flap is generated, so that [insensitive air flow] toward the lower portion of the side wall is sufficiently generated. The

In addition , when generating an air flow toward the lower portion of the side wall, the lower end of the rear flap is already facing the side wall, and the curved surface of the second air current surface is inflated to the front side. It will face further to the side wall side than the inclination direction of the flap.

Therefore, the blown air after leaving the second airflow surface of the rear flap is surely [insensitive airflow] toward the lower portion of the side wall. Furthermore, since the radius of the curved surface is 200 mm or more, [insensitive airflow] toward the lower portion of the side wall is easily generated.

The air conditioning indoor unit according to the second aspect of the present invention is the air conditioning indoor unit according to the first aspect, and the second airflow surface further has a flat surface. Moreover, it arrange | positions in order of the plane and the curved surface in the 2nd airflow surface toward the lower end from the upper end of the rear flap.

  In this air conditioning indoor unit, since the blown air flows along the plane of the second airflow surface and the curved surface in this order, when generating the airflow toward the lower portion of the side wall, the blown air becomes a downward airflow along the plane and then the Coanda. Due to the effect, the airflow is drawn toward the curved surface toward the lower portion of the side wall. Therefore, [insensitive airflow] toward the lower portion of the side wall is easily generated.

An air conditioning indoor unit according to a third aspect of the present invention is the air conditioning indoor unit according to the first aspect, and when the front flap generates an air flow toward the lower part of the side wall, its lower end is placed closer to the side wall than the upper end. The position which makes it position and inclines a 1st airflow surface with respect to a vertical surface is taken.

  In this air-conditioning indoor unit, the front flap is inclined more than 90 ° below the horizontal by positioning the lower end of the front flap on the side wall side with respect to the upper end and inclining with respect to the vertical plane. Deflection can be performed on the side wall, and [insensitive airflow] toward the lower part of the side wall can be easily realized.

The air conditioning indoor unit pertaining to the fourth aspect of the present invention is the air conditioning indoor unit pertaining to the first aspect, wherein the front flap includes a small flap and a large flap. The large flap is larger than the small flap and is located downstream of the small flap in the flow of the blown air.

  In this air conditioning indoor unit, the air guided by the small flaps is along a larger flap than that, so that the blown air is guided in the target direction without peeling off in the middle.

The air conditioning indoor unit pertaining to the fifth aspect of the present invention is the air conditioning indoor unit pertaining to the fourth aspect , wherein the small flap and the large flap form two surfaces forming a predetermined angle.

  In this air conditioning indoor unit, since the blown air is guided in a predetermined wind direction on the two surfaces of the small flap and the large flap, airflow control is easy.

  In the air conditioning indoor unit pertaining to the first aspect of the present invention, the blown air passing through the air passage space sandwiched between the front flap and the rear flap is not allowed to diffuse forward until it reaches below the lower end of the blow outlet. Proceeding along the air passage space in the state of being blocked by the flap, and when leaving the air passage space, the air flow is along the second air flow surface of the rear flap. Airflow] is sufficiently generated.

In addition, when generating the airflow toward the lower part of the side wall, the lower end of the rear flap is already facing the side wall side, and the curved surface of the airflow surface is inflated to the front side. It will face further to the side wall side than the inclination direction. Therefore, the blown air after leaving the second airflow surface of the rear flap is surely [insensitive airflow] toward the lower portion of the side wall. Furthermore, since the radius of the curved surface is 200 mm or more, [insensitive airflow] toward the lower portion of the side wall is easily generated.

In the air conditioning indoor unit pertaining to a second aspect of the present invention, the blowout air plane of the second air flow surface, so flows along the order of the curved surface, when generating an air flow towards the lower portion of the side wall, the outlet air is taken along a plane After becoming a downward airflow, it is attracted to the curved surface by the Coanda effect and becomes an airflow toward the lower portion of the side wall. Therefore, [insensitive airflow] toward the lower portion of the side wall is easily generated.

In the air conditioning indoor unit pertaining to the third aspect of the present invention, the front flap is inclined more than 90 ° below the horizontal by tilting the front flap with its lower end positioned on the side wall side of the upper end and tilting with respect to the vertical plane. Thus, the blown air can be deflected toward the side wall, and [insensitive air flow] toward the lower part of the side wall can be easily realized.

In the air conditioning indoor unit according to the fourth aspect of the present invention, since the air guided by the small flaps is along the larger flap, the blown air is guided in the aimed direction without being peeled off in the middle.

In the air conditioning indoor unit pertaining to the fifth aspect of the present invention, since the blown air is guided in a predetermined wind direction on the two surfaces of the small flap and the large flap, airflow control is easy.

The perspective view of the air-conditioning indoor unit at the time of the operation | movement which concerns on one Embodiment of this invention. Sectional drawing of the air-conditioning indoor unit in FIG. The expanded sectional view of the front flap and rear flap in FIG. Sectional drawing of the air-conditioning indoor unit at the time of operation stop. Sectional drawing of the air-conditioning indoor unit at the time of the front downward airflow mode using a sub front flap. FIG. 6 is an enlarged cross-sectional view of a front flap, a sub-front flap, and a rear flap in FIG. 5. The fragmentary sectional view of the air-conditioning indoor unit at the time of the front downward airflow mode which does not use a sub front flap. The fragmentary sectional view of the air-conditioning indoor unit at the time of circulation airflow mode. The fragmentary sectional view of the air-conditioning indoor unit at the time of intermediate airflow mode. The expanded sectional view of the front flap of the air-conditioning indoor unit concerning a 1st modification, a sub front flap, and a rear flap. The expanded sectional view of the front flap of the air-conditioning indoor unit concerning a 2nd modification, a sub front flap, and a rear flap. The expanded sectional view of the front flap of the air-conditioning indoor unit concerning a 3rd modification, a sub front flap, and a rear flap. Sectional drawing of the said back flap vicinity which shows the positional relationship of a back flap and a blower outlet.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. The following embodiments are specific examples of the present invention and do not limit the technical scope of the present invention.

(1) Configuration of Air Conditioning Indoor Unit 10 FIG. 1 is a perspective view of the air conditioning indoor unit 10 during operation according to one embodiment of the present invention. FIG. 2 is a cross-sectional view of the air conditioning indoor unit 10 in FIG. 1 and 2, the air conditioning indoor unit 10 is a wall-hanging type. 1 and 2, the airflow direction mode is set to the rearward downward airflow mode in which the blown air is directed to the lower part of the side wall where the air conditioning indoor unit 10 is installed.

  The air conditioning indoor unit 10 includes a main body casing 11, an indoor heat exchanger 13, an indoor fan 14, a frame 17, and a control unit 50.

  The main body casing 11 includes a top surface portion 11a, a front panel 11b, a back plate 11c, an inclined lower surface portion 11d, and a horizontal lower surface portion 11e, and includes an indoor heat exchanger 13, an indoor fan 14, a frame 17, and a control unit 50 inside. Stored.

  The top surface part 11a is located in the upper part of the main body casing 11, and is provided with a suction port (not shown) from the front part to the rear part of the top surface part 11a.

  The front panel 11b constitutes the front part of the indoor unit, and has a flat shape without a suction port or a curved shape with a large curvature. Further, the upper end of the front panel 11b is rotatably supported by the top surface portion 11a, and can operate in a hinged manner.

  The indoor heat exchanger 13 and the indoor fan 14 are attached to the frame 17. The indoor heat exchanger 13 exchanges heat with the passing air. In addition, the indoor heat exchanger 13 has an inverted V-shape in which both ends are bent downward in a side view, and the indoor fan 14 is located below the indoor heat exchanger 13. The indoor fan 14 is a cross-flow fan, blows air taken in from the room against the indoor heat exchanger 13 and then blows it into the room.

  An air outlet 15 is provided at the lower part of the main body casing 11. A rear flap 40 for changing the direction of the blown air blown from the blower outlet 15 is rotatably attached to the blower outlet 15. The rear flap 40 is driven by a motor (not shown) and can change the direction of the blown air, and can also open and close the blowout port 15. The rear flap 40 can take a plurality of postures having different inclination angles.

  A front flap 31 is provided in the vicinity of the air outlet 15. The front flap 31 can take a posture inclined in the front-rear direction by a motor (not shown), and is provided on the inclined lower surface portion 11d between the lower end of the front panel 11b and the outlet 15 when the operation is stopped. It is accommodated in the accommodating part 130. The front flap 31 can take a plurality of postures having different inclination angles.

  A sub-front flap 32 is rotatably arranged upstream of the front flap 31 in the flow of blown air. In the present embodiment, the front flap 31, the sub front flap 32, and the rear flap 40 generate a backward downward airflow. The front flap 31 and the sub-front flap 32 are collectively referred to as a front flap group 30.

  Further, the air outlet 15 is connected to the inside of the main body casing 11 by the air outlet channel 18. The blowout flow path 18 is an air path sandwiched between the upper scroll 171 and the lower scroll 172 of the frame 17.

  The indoor air is sucked into the indoor fan 14 through the suction port and the indoor heat exchanger 13 by the operation of the indoor fan 14, and blown out from the blower outlet 15 through the blowout passage 18 from the indoor fan 14.

  The control unit 50 is disposed in a space provided between the front drain pan 61 and the upper partition wall 161 of the blower outlet forming wall 16. The control unit 50 controls the rotational speed of the indoor fan 14 and controls the operation of the rear flap 40 and the front flap group 30.

  The front drain pan 61 is positioned below the front lower portion of the indoor heat exchanger 13 and receives condensed water generated at the front portion of the indoor heat exchanger 13.

(2) Detailed configuration In the following description, the expression “front end, rear end” of each member is defined as “lower end, upper end” for convenience when the member is in a vertical posture or a posture approaching a vertical posture. Express in other words.

(2-1) Main body casing 11
As shown in FIG. 1, the main body casing 11 has a top surface portion 11 a that gently slopes downward from the rear toward the front. The top surface portion 11a is provided with a suction port (not shown).

  The front portion of the main casing 11 is constituted by a front panel 11b. The front panel 11b extends from the upper front part of the main casing 11 to the lower front part while drawing a gentle arc curved surface.

  The lower front side of the main body casing 11 is configured by an inclined lower surface portion 11d that connects the lower end of the front panel 11b and the upper end of the air outlet 15. The inclined lower surface portion 11 d is formed with a region that is recessed toward the inside of the main body casing 11. The depth of the recess in this region is set so as to match the thickness dimension of the front flap 31, and constitutes an accommodating portion 130 in which the front flap 31 is accommodated. The surface of the accommodating part 130 is also a gentle circular curved surface.

  The lower rear side of the main body casing 11 is configured by a horizontal lower surface portion 11e that extends from the rear end side of the air outlet 15 to the lower back surface.

(2-2) Air outlet 15
As shown in FIG. 2, the blower outlet 15 is formed in the lower part of the main body casing 11, and is a rectangular opening which makes a horizontal direction (direction orthogonal to the paper surface of FIG. 2) a long side. The air outlet 15 is contoured by an air outlet forming wall 16.

  The air outlet forming wall 16 includes an upper partition wall 161 that forms the upper surface of the air outlet port 15 and a lower partition wall 162 that forms the lower surface of the air outlet port 15. The upper partition wall 161 is provided with a front rib 15 a that protrudes vertically downward from the front end position of the air outlet 15.

  A housing partition wall 131 is arranged on the opposite side of the upper partition wall 161 (in front of the front rib 15a) across the front rib 15a. The accommodating part partition wall 131 is a wall that forms the upper surface of the accommodating part 130. The upper partition 161, the front rib 15a, and the housing partition wall 131 are integrally formed.

  Further, the lower partition wall 162 is provided with a rear rib 15b that protrudes vertically downward from the rear end position of the air outlet 15. The lower partition 162 and the rear rib 15b are integrally formed.

(2-3) Frame 17
The frame 17 is a partition wall curved so as to face the indoor fan 14. The frame 17 includes an up scroll 171 and a down scroll 172. An upper partition 161 of the blower outlet forming wall 16 is adjacent to the tangential direction of the end of the upper scroll 171. Further, the lower partition wall 162 of the blower outlet forming wall 16 is adjacent to the tangential direction of the terminal end of the lower scroll 172.

  The air passing through the blowout flow path 18 travels along the upper scroll 171 and the lower scroll 172, is sent in the tangential direction of the terminal ends thereof, and travels along the upper partition wall 161 and the lower partition wall 162 of the blower outlet forming wall 16. The air is blown out from the air outlet 15.

(2-4) Vertical wind direction adjusting plate 20
The vertical air direction adjusting plate 20 has a plurality of blade pieces 201 arranged along the longitudinal direction of the air outlet 15 (direction perpendicular to the paper surface of FIG. 2). The vertical air direction adjusting plate 20 is disposed at a position closer to the indoor fan 14 than the rear flap 40 in the blowout flow path 18. The plurality of blade pieces 201 swings left and right around a state perpendicular to the longitudinal direction by horizontally reciprocating along the longitudinal direction of the air outlet 15.

(2-5) Front flap 31
3 is an enlarged cross-sectional view of the front flap 31 and the rear flap 40 in FIG. FIG. 4 is a cross-sectional view of the air conditioning indoor unit when operation is stopped. 3 and 4, the front flap 31 is accommodated in the accommodating portion 130 while the air conditioning operation is stopped.

  The front flap 31 is separated from the accommodating portion 130 by rotating. The rotation axis of the front flap 31 is set below the front rib 15a of the upper partition wall 161 of the blower outlet forming wall 16, and the rear end of the front flap 31 and the rotation shaft are connected at a predetermined interval. ing. Therefore, the height position of the rear end of the front flap 31 is rotated so that the front flap 31 is rotated away from the accommodating portion 130.

  The front flap 31 is moved counterclockwise when viewed from the front of FIG. Further, the front flap 31 is rotated clockwise in FIG. 2 when viewed from the front of FIG. 2, so that the front flap 31 approaches the housing portion 130 and is finally housed in the housing portion 130.

  The operating state of the front flap 31 includes the attitude accommodated in the accommodating portion 130 (see FIG. 4), the attitude rotated and tilted forward and upward, further rotated and substantially horizontal, and further rotated and downwardly forward. There are postures that are inclined to the rear, and postures that are further rotated and inclined backward and downward (see FIGS. 2 and 3).

  The front flap 31 has a first surface 31a that forms an outer surface and a second surface 31b that forms an inner surface when the front flap 31 is in the posture of being accommodated in the accommodating portion 130. The first surface 31a and the second surface 31b form a rear surface and a front surface, respectively, when the front flap 31 is inclined downward and rearward in FIG.

  As shown in FIG. 3, the first surface 31 a is provided with a recess 311 whose size is reduced in the thickness direction of the front flap 31. The recess 311 is located closer to the rotation axis when viewed from the center of the front flap 31.

  Further, the dimension of the front flap 31 in the longitudinal direction (direction perpendicular to the paper surface of FIG. 2) is set to be equal to or larger than the dimension of the rear flap 40 in the longitudinal direction. The reason is that, for example, when the wind direction is upward, all of the blown air whose wind direction is adjusted by the rear flap 40 is received by the front flap 31, and the action / effect is short of the blown air from the side of the front flap 31. It is to prevent the circuit.

(2-6) Sub-front flap 32
The sub-front flap 32 is a plate-like member that is located upstream of the front flap 31 in the flow of blown air. The sub-front flap 32 is smaller than the front flap 31, but the sub-front flap 32 is set to a size sufficient to guide the air that has passed through the blowout flow path 18 to the first surface 31 a of the front flap 31.

  The sub-front flap 32 is accommodated in an accommodating portion 16a provided in the upper partition wall 161 of the outlet forming wall 16 when not in use. The sub-front flap 32 has a first surface 32a that forms a lower surface and a second surface 32b that forms an upper surface when in the posture of being accommodated in the accommodating portion 16a. The first surface 32a and the second surface 32b form a rear surface and a front surface, respectively, when the sub-front flap 32 takes the posture shown in FIG.

  The accommodating part 16a is formed by denting the upper partition 161 of the blower outlet forming wall 16 in the thickness direction. The depth of the accommodating portion 16a is set so that the first surface 32a of the sub-front flap 32 does not protrude toward the flow path side from the surface of the upper partition wall 161 when the sub-front flap 32 is accommodated.

  When the sub-front flap 32 is used, the sub-front flap 32 moves from the housing portion 16 a by rotation and protrudes toward the flow path side from the surface of the upper partition wall 161. The rotation axis of the sub-front flap 32 is set below the upstream end of the accommodating portion 16a.

  For example, when the front flap 31 is inclined rearward and downward as shown in FIG. 3, the sub front flap 32 rotates so that its front end enters the recessed portion 311 of the front flap 31. At this time, since the blown air bypasses the gap between the upper partition wall 161 and the sub front flap 32 when the entire sub front flap 32 is separated from the housing portion 16a, the rear end of the sub front flap 32 is placed in the housing portion in order to prevent this. 16a remains and the expansion of the gap between the upper partition wall 161 and the sub-front flap 32 is suppressed.

  Thereafter, the first surface 32a of the sub-front flap 32 and the first surface 31a of the front flap 31 form an air flow guide surface 30a, and generate an air flow toward the lower portion of the side wall together with the rear flap 40.

(2-7) Rear flap 40
The rear flap 40 has an area that can close the air outlet 15 as shown in FIG. The rear flap 40 has a first surface 40a that forms an outer surface and a second surface 40b that forms an inner surface when the air outlet 15 is closed. The first surface 32a and the second surface 32b form a rear surface and a front surface, respectively, when the rear flap 40 takes a posture in which the rear flap 40 is inclined rearward and downward in FIG.

  The first surface 40a is finished to a gentle circular curved surface that is convex outwardly with emphasis on design. In contrast, the second surface 40b includes a flat surface 40ba and a curved surface 40bb, and is arranged in the order of the flat surface 40ba and the curved surface 40bb from the upper end to the lower end of the rear flap 40 as shown in FIG. Yes. In FIG. 3, the curved surface 40bb is a curved surface that swells to the front side with a radius of 200 mm or more.

  The rotation axis of the rear flap 40 is set at a position adjacent to the rear rib 15 b of the lower partition 162 of the blower outlet forming wall 16. When the rear flap 40 rotates about the rotation axis in the counterclockwise direction of FIG. 4 when viewed from the front, the rear flap 40 operates to move away from the front end of the air outlet 15 to open the air outlet 15. On the contrary, the rear flap 40 rotates in the clockwise direction in FIG. 2 around the rotation axis, so that the rear flap 40 moves closer to the front end of the outlet 15 and closes the outlet 15.

  In a state where the rear flap 40 opens the blower outlet 15, the blown air blown from the blower outlet 15 flows along the second surface 40 b of the rear flap 40 substantially.

(3) Direction control of blown air The air-conditioning indoor unit of this embodiment changes the attitude | position of the front flap 31, the sub front flap 32, and the rear flap 40 for every wind direction mode as a means to control the direction of blown air, and blows off air The direction is adjusted. Hereinafter, each wind direction mode will be described with reference to the drawings. Each wind direction mode can be controlled to be automatically changed, or can be selected by a user via a remote controller or the like.

(3-1) Rear Downward Airflow Mode The rearward downward airflow mode is a mode in which the blown air is directed toward the lower part of the side wall where the air conditioning indoor unit 10 is installed. In the rear downward airflow mode, the blown air flows from the lower part of the side wall to the floor surface and flows toward the opposite side wall along the floor surface. This airflow is also called “insensitive airflow” because it does not directly hit the resident and it is difficult to feel the air flow.

  In the rear downward airflow mode, the front flap 31, the sub front flap 32, and the rear flap 40 take the posture shown in FIGS. In FIG. 3, the sub front flap 32 is inclined at an angle α (0 to 10 °) with respect to the vertical plane with its lower end positioned in front of the upper end.

  Further, the front flap 31 is inclined at an angle β (0 to 20 °) with respect to the vertical plane with its lower end positioned on the side of the side wall from the upper end. Thereby, the convex airflow guide surface 30a in which the first surface 32a of the sub front flap 32 and the first surface 31a of the front flap 31 bulge forward is formed.

  The lower end of the front flap 31 at this time is positioned below the height position of the tip of [the rear rib 15b protruding vertically downward from the rear end position of the blowout port 15]. The front end of the rear rib 15 b is the lowermost end of the air outlet 15.

  On the other hand, the rear flap 40 has its lower end positioned closer to the side wall than the upper end, and the second surface 40b is inclined with respect to the vertical plane. Specifically, as shown in FIG. 3, the rear flap 40 is inclined until the first surface 40 a of the rear flap 40 contacts or approaches the tip of the rear rib 15 b.

  In the present embodiment, since the gap between the rear flap 40 and the rear rib 15b is equal to or less than a predetermined value (5 mm), the ventilation resistance when air flows through the gap is increased, and the blown air passes through the gap. The airflow guide space 30a and the second surface 40b, which is a wider passage, are avoided and flow into the air passage space.

  Accordingly, the blown air passes through the air passage space sandwiched between the airflow guide surface 30a and the second surface 40b. In that case, the blowing air guided to the sub front flap 32 follows the front flap 31 larger than that. Since the front flap 31 is inclined with respect to the vertical plane with the lower end of the front flap 31 positioned on the side of the side of the upper end, the blown air can be guided to the lower side of the side wall downward by 90 ° or more from the horizontal.

  Further, until the blown air passing through the air passage space sandwiched between the airflow guide surface 30a and the second surface 40b reaches below the height position of the tip of the rear rib 15b (the lowermost end of the blowout port 15), The vehicle advances along the air passage space in a state where forward diffusion is prevented by the front flap 31. Since the blown air becomes an air flow along the second surface 40b of the rear flap 40 when leaving the air passage space, the air flow toward the lower portion of the side wall is sufficiently generated.

  Further, the blown air flows in the order of the flat surface 40ba and the curved surface 40bb of the second surface 40b of the rear flap 40. Since the curved surface 40bb is set to have a radius of 200 mm or more so that the Coanda effect can be easily exerted, the blown air is drawn downward to the curved surface 40bb by the Coanda effect after being turned downward along the plane 40ba. The airflow toward

  As described above, when the front flap group 30 and the rear flap 40 by the front flap 31 and the sub front flap 32 interact with each other, a backward downward airflow (insensitive airflow) toward the lower portion of the side wall is easily generated. .

(3-2) Front Downward Airflow Mode In the forward downward airflow mode, either the mode using the sub-front flap 32 or the mode not using is selected automatically or by the user.

(3-2-1) Mode Using Sub-Front Flap 32 FIG. 5 is a cross-sectional view of the air conditioning indoor unit 10 in the forward downward airflow mode using the sub-front flap 32. 6 is an enlarged cross-sectional view of the front flap 31, the sub-front flap 32, and the rear flap 40 in FIG.

  5 and 6, first, the front flap 31 is rotated so that the first surface 31a of the front flap 31 is inclined downward by a predetermined angle x1 from the horizontal. If the first surface 31a is an arc surface and it is difficult to determine the angle, a line connecting both ends of the first surface 31a may be used as the angle reference, as shown in FIG.

  Further, the sub-front flap 32 also rotates, and the first surface 32a of the sub-front flap 32 is inclined downward by a predetermined angle y1 from the horizontal. At this time, since the blown air bypasses the gap between the upper partition wall 161 and the sub front flap 32 when the entire sub front flap 32 is separated from the housing portion 16a, the rear end of the sub front flap 32 is placed in the housing portion in order to prevent this. 16a remains and the expansion of the gap between the upper partition wall 161 and the sub-front flap 32 is suppressed.

  Further, the rear flap 40 is also rotated so that the flat surface 40ba of the second surface 40b of the rear flap 40 is inclined downward by a predetermined angle z1 from the horizontal.

  As shown in FIG. 6, when the front flap 31 and the sub front flap 32 are viewed from the front in the horizontal direction, the front end portion of the sub front flap 32 is upstream of the front flap 31 and the front flap 31. It overlaps the rear end of the front flap 31 by a dimension L vertically below the rear end surface.

  The positional relationship between the front flap 31, the sub front flap 32, and the gap between them is a relationship in which the sub front flap 32, the gap, and the front flap 31 are arranged in this order, as viewed from the upstream side of the flow of the blown air. Since it is hidden by the upstream sub-front flap 32, the air guided to the first surface 32 a of the sub-front flap 32 through the blow-out flow path 18 is vigorous and does not rotate around the gap, but the first surface of the front flap 31. It flows to 31a. As a result, even if there is the gap, the conditioned air is prevented from bypassing the gap.

  As described above, in the forward downward airflow mode using the sub-front flap 32, the sub-front flap 32 takes a posture of blocking the airflow passing through the gap between the upper partition wall 161 and the front flap 31, and the upper end of the front flap 31 is the boundary. Since blowing air is prevented from flowing along both surfaces of the front flap 31, the upper end of the front flap 31 does not become ventilation resistance. As a result, an increase in power consumption of the indoor fan 14 and a decrease in energy saving performance are prevented.

  Further, the forward downward airflow mode using the sub-front flap 32 is particularly useful when generating forward downward blowing air in the cooling operation. This is because the cooled air does not flow to the second surface 31b side of the front flap 31 and thus has an effect of preventing condensation.

  In the present embodiment, the sub-front flap 32 is used in the cooling operation except when an upward airflow is generated.

(3-2-2) Mode in which Sub-front Flap 32 is not Used FIG. 7 is a cross-sectional view of the air conditioning indoor unit 10 in the forward downward airflow mode in which the sub-front flap 32 is not used. In FIG. 7, the sub-front flap 32 is accommodated in the accommodating portion 16 a, and the first surface 32 a of the sub-front flap 32 is along the extended surface of the adjacent upper partition 161, and the air along the upper partition 161 Does not obstruct the flow.

  In the forward downward airflow mode in which the sub-front flap 32 is not used, the sub-front flap 32 itself does not have ventilation resistance. However, since the sub-front flap 32 cannot prevent the airflow passing through the gap between the upper partition wall 161 and the front flap 31, it cannot be denied that the upper end of the front flap 31 becomes a ventilation resistance.

(3-3) Forward airflow mode In the forward airflow mode, a circulation airflow mode that sends out the blown air forward vigorously and an intermediate airflow mode that sends out the blown air thickly forward are selected automatically or by the user.

(3-3-1) Circulation Airflow Mode FIG. 8 is a partial cross-sectional view of the air conditioning indoor unit 10 in the circulation airflow mode. In FIG. 8, the front flap 31 takes a horizontal posture or a posture in which the front end is directed horizontally forward. The sub-front flap 32 is accommodated in the accommodating portion 16a. The rear flap 40 has an inclined posture in which the flat surface 40ba of the second surface 40b is along the extension of the tangent at the end of the lower partition 162 of the blower outlet forming wall 16. Since the lower partition 162 is also inclined along the extension of the tangent at the terminal end of the lower scroll 172, the lower scroll 172, the lower partition 162, and the plane 40ba are arranged so as to form one scroll wall. Is guided to the second surface 40b of the rear flap 40 without being interrupted.

  In the circulation airflow mode, since the distance between the first surface 31a of the front flap 31 and the second surface 40b of the rear flap 40 is narrow, the blown air is squeezed to increase the flow velocity, and the air is sent forward. Stir the air in the space. As a result, air stagnation in the air-conditioning target space can be eliminated.

(3-3-2) Intermediate Airflow Mode FIG. 9 is a partial cross-sectional view of the air conditioning indoor unit 10 in the intermediate airflow mode. In FIG. 9, the front flap 31 takes a posture in which the front end is directed above the horizontal. The sub-front flap 32 is accommodated in the accommodating portion 16a. The rear flap 40 has a posture in which the flat surface 40ba of the second surface 40b is inclined forward and downward.

  At first glance, it seems that the blown air flows forward and downward along the plane 40ba of the rear flap 40. However, the blown air that has exited the blowout port 15 is attracted to the first surface 31a of the front flap 31 by the Coanda effect and becomes horizontal and It is sent out as a slightly upward airflow from the horizontal.

  Here, the Coanda effect is a phenomenon in which if there is a wall near the flow of gas or liquid, it will flow in the direction along the wall even if the direction of the flow is different from the direction of the wall (Asakura). Bookstore "Dictionary of the Law").

  In FIG. 9, in order to produce the Coanda effect on the first surface 31a of the front flap 31, the front flap 31 and the rear flap 40 need to be less than a predetermined opening angle. Since the positional relationship between the two is disclosed in a patent document (Japanese Patent Laid-Open No. 2013-76530) filed on September 30, 2011 by the applicant, description thereof is omitted here.

(4) Features (4-1)
In the air conditioning indoor unit 10, the blown air passing through the air passage space sandwiched between the front flap group 30 (the front flap 31 and the sub front flap 32) and the rear flap 40 reaches below the lowermost end of the blowout port 15. Until the front flap 31 prevents the forward diffusion, the air travels along the air passage space. When leaving the air passage space, the air flows along the second surface 40b of the rear flap 40. Therefore, [insensitive airflow] toward the lower part of the side wall is sufficiently generated.

(4-2)
In the air conditioning indoor unit 10, when generating a rearward downward airflow (insensitive airflow), the lower end of the rear flap 40 is already facing the side wall side, and the curved surface 40bb of the second surface 40b is swollen forward. The tangent line at the end of the curved surface 40bb is further directed to the side wall side than the inclination direction of the rear flap 40. Therefore, the blown air after leaving the second surface 40b of the rear flap 40 is surely a rearward downward airflow.

(4-3)
In the air conditioning indoor unit 10, the blown air flows along the plane 40ba of the second surface 40b of the rear flap 40 and the curved surface 40bb in this order. After that, it is drawn to the curved surface 40bb by the Coanda effect and becomes an air flow toward the lower portion of the side wall. Therefore, a backward downward airflow is easily generated.

(4-4)
In the air conditioning indoor unit 10, the front flap 31 has its lower end positioned on the side wall side with respect to the upper end and is inclined with respect to the vertical plane, so that the first surface 31 a faces downward by 90 ° or more from the horizontal. Airflow can be easily realized.

(4-5)
In the air conditioning indoor unit 10, the air guided to the sub-front flap 32 is along the front flap 31 that is larger than that, and airflow control is easy.

(5) Modification (5-1) First Modification In the above embodiment, as shown in FIG. 3, a recess 311 is provided on the first surface 31 a of the front flap 31, and the tip of the sub-front flap 32 is the It was set as the structure which penetrates into the hollow part 311. However, it is not limited to this, You may provide a hollow part in the sub front flap 32 side.

  FIG. 10 is an enlarged cross-sectional view of the front flap 31, the sub-front flap 32, and the rear flap 40 of the air conditioning indoor unit 10 according to the first modification. In FIG. 10, a recess 321 whose size decreases in the thickness direction from the second surface 32 b side of the sub-front flap 32 is formed.

  In the first modified example, when the wind direction mode is the backward downward airflow mode, the front flap 31 and the sub front flap 32 are superposed. At this time, the upper end corner portion of the first surface 31a of the front flap 31 is the sub top portion. Since it fits in the hollow part 321 of the front flap 32, the level | step difference produced between the 1st surface 31a of the front flap 31 and the 1st surface 32a of the sub front flap 32 becomes small, and disturbance of airflow is suppressed.

(5-2) Second Modification Also, in the embodiment shown in FIG. 3 and the first modification shown in FIG. 10, the lower end portion of the sub-front flap 32 overlaps from the first surface 31 a side of the front flap 31. . However, the present invention is not limited to this, and the lower end portion of the sub-front flap 32 may overlap from the second surface 31 b side of the front flap 31.

  FIG. 11 is an enlarged cross-sectional view of the front flap 31, the sub-front flap 32, and the rear flap 40 of the air conditioning indoor unit 10 according to the second modification. In FIG. 11, the position of the sub-front flap 32 has moved forward as compared to that shown in FIGS. Along with this, the position and shape of the accommodating portion 16a are also changed.

  The sub-front flap 32 rotates counterclockwise as viewed from the front in FIG. 11 around the rotation axis set on the rear end side, so that the lower end portion of the sub-front flap 32 is the second surface 31b of the front flap 31. Overlapping from the side.

  Since the first surface 32a excluding the overlapping portion of the sub front flap 32 and the first surface 31a of the front flap 31 form a forward airflow guide surface 30a, the blown air is generated by the first surface 32a of the sub front flap 32. Immediately after being deflected forward and downward, the first surface 31a of the front flap 31 deflects backward and downward.

  As a result, the blown air flows through the air passage space sandwiched between the airflow guide surface 30a and the second surface 40b of the rear flap 40 to become a rearward downward airflow.

(5-3) Third Modified Example In the above embodiment, as shown in FIG. 6, the sub-front flap 32 is accommodated in the concave accommodating portion 16 a provided in the upper partition wall 161 of the blower outlet forming wall 16 and rotated. Thus, the structure protruded into the flow path. However, the present invention is not limited to this, and may be configured to protrude into the flow path by linear movement.

  FIG. 12 is an enlarged cross-sectional view of the front flap 31, the sub-front flap 32, and the rear flap 40 of the air conditioning indoor unit 10 according to the third modification. In FIG. 12, the upper partition wall 161 is formed with a housing portion 16 a that is a space that penetrates the sub-front flap 32 and is housed in the back.

  When the sub-front flap 32 is not used, the sub-front flap 32 enters the accommodating portion 16 a to the extent that its front end is hidden by the upper partition wall 161. When the sub front flap 32 is in the forward downward airflow mode, it projects into the flow path by linear movement.

(6) Others FIG. 13 is a cross-sectional view of the vicinity of the rear flap 40 showing the positional relationship between the rear flap 40 and the outlet 15. In FIG. 13, the upper end of the rear flap 40 forms an arc having a radius D <b> 2, and the arc center and the rotation center of the rear flap 40 substantially coincide with each other.

  The rear flap 40 moves its lower end (front end in the horizontal posture) from the horizontal front to the rear downward by rotation. At the time of rotation, the circular arc surface at the upper end of the rear flap 40 maintains a constant gap D1 with the rear rib 15b protruding vertically downward from the rear end position of the blowout port 15. In the present embodiment, the gap D1 is set to 5 mm or less.

  Even if the blown air passing through the upper end of the rear flap 40 flows through the gap D1, the airflow resistance is too large compared to other ventilation paths, and therefore flows from the upper end to the second surface 40b side without passing through the gap D1.

  As described above, since the gap D1 is set to a certain value or less, the blown air does not flow to the first surface 40a side through the gap D1. Therefore, in the present embodiment, the first surface 40a of the rear flap 40 can be handled as part of the design of the main body casing 11 without being involved in wind direction control.

10 Air-conditioning indoor unit 15 Air outlet 30 Front flap group (front flap)
30a Airflow guide surface (airflow surface)
31 Front flap (large flap)
32 Sub front flap (small flap)
40 Rear flap 40b 2nd surface (air flow surface)
40ba plane 40bb curved surface

JP 2004-218894 A

Claims (5)

A wall-mounted air conditioning indoor unit that is installed on the side wall of the air-conditioning target space and changes the air direction of the blown air blown out from the air outlet (15) by a plurality of flaps,
A front flap (30) for adjusting the wind direction of the blown air;
A rear flap (40) for adjusting the wind direction of the blown air at a position closer to the side wall than the front flap (30);
With
The front flap (30) has a first airflow surface (30a) along which the blown air follows the blown air when passing through an air passage space sandwiched between the rear flap (40) and the front flap (30). )
The rear flap (40) has a second air flow surface (40b) along which the blown air passes along the blown air space when passing through the air passage space,
When the front flap (30) generates an air flow toward the lower part of the side wall, the lower end of the front flap (30) is positioned below the lowermost end of the outlet (15),
When the rear flap (40) generates an air flow toward the lower portion of the side wall, the lower end of the rear flap (40) is positioned on the side of the side wall with respect to the upper end, and the second air flow surface (40b) is inclined with respect to the vertical surface. Ri door a predetermined posture,
The second air flow surface (40b) has a curved surface (40bb) that swells forward in the predetermined posture,
The radius of the curved surface (40bb) is 200 mm or more,
Air conditioning indoor unit (10). The second airflow surface (40b) further has a flat surface (40ba), and is arranged in the order of the flat surface (40ba) and the curved surface (40bb) from the upper end to the lower end of the rear flap (40). Yes,
The air conditioning indoor unit (10) according to claim 1 . When the front flap (30) generates an air flow toward the lower portion of the side wall, the lower end of the front flap (30) is positioned on the side of the side wall with respect to the upper end, and the first air flow surface (30a) is positioned with respect to a vertical surface. Take a tilted posture,
The air conditioning indoor unit according to claim 1. The front flap (30)
A small flap (32),
A large flap (31) that is larger than the small flap (32) and located downstream of the small flap (32) in the flow of the blown air;
including,
The air conditioning indoor unit (10) according to claim 1. The small flap (32) and the large flap (31) form two surfaces forming a predetermined angle.
The air conditioning indoor unit (10) according to claim 4 .

Images