WO2013084751A1

WO2013084751A1 - Indoor air-conditioning unit

Info

Publication number: WO2013084751A1
Application number: PCT/JP2012/080595
Authority: WO
Inventors: 顕木下; 松原　篤志; 隆滋森
Original assignee: ダイキン工業株式会社
Priority date: 2011-12-05
Filing date: 2012-11-27
Publication date: 2013-06-13

Abstract

With respect to an indoor air-conditioning unit equipped with a horizontal flap, the objective of the present invention is to reduce the operating time of the horizontal flap of the indoor air-conditioning unit without switching to a motor having higher output than a conventional motor. The horizontal flap is constructed such that the torque of a link-driving motor capable of driving the horizontal flap (30) in a first orientation-changing state from a time t6 to a time t7 is less than the torque of the link-driving motor capable of driving the horizontal flap (30) in a second orientation-changing state from the time t7 to a time t8. An indoor control unit sets the rotational frequency per unit time of the link-driving motor so as to be greater in a first control mode that controls the first orientation-changing state than in a second control mode that controls the second orientation-changing state.

Description

Air conditioning indoor unit

The present invention relates to an air-conditioning indoor unit that controls the air direction of blown air using a flap.

A wall-mounted air conditioning indoor unit attached to a wall surface in a room generally includes a horizontal flap for controlling the wind direction in the vertical direction. And an air-conditioning indoor unit controls a wind direction of an up-down direction by rotating a horizontal flap with a motor.
Such a horizontal flap is rotated by a motor and a gear that rotate at a constant speed. Therefore, a certain time is required for the operation for moving the horizontal flap to a certain angle. On the other hand, as described in Patent Document 1 (Japanese Patent Application Laid-Open No. 2007-40628), the angle of the upper and lower blades (horizontal flaps) affects the air blowing, so the purpose is to reduce the influence on the air blowing. In addition, the swing speed of the upper and lower blades may be controlled.

However, the technique described in Patent Literature 1 exclusively slows the moving speed of the upper and lower blades and causes the operation of the air conditioning indoor unit to be delayed.
An object of the present invention is to reduce an operation time of a horizontal flap of an air-conditioning indoor unit in an air-conditioning indoor unit including a horizontal flap without changing to a motor having a larger output than before.

The air conditioner indoor unit according to the first aspect of the present invention includes a first posture change state that changes from the first posture to the second posture and a second posture that changes from the third posture to the fourth posture in order to control the vertical wind direction. A horizontal flap capable of taking a posture change state, a motor for driving the horizontal flap, a first control mode for controlling the motor in the first posture change state, and a second control mode for controlling the motor in the second posture change state The horizontal flap is configured such that the torque of the motor that can be driven in the first posture change state is smaller than the torque of the motor that can be driven in the second posture change state. The control unit is set so that the number of revolutions per unit time of the motor is larger in the first control mode than in the second control mode.
In this air conditioner indoor unit, since the torque of the motor that can be driven in the first posture change state is smaller than the torque in the second posture change state, even if the rotational speed in the first posture change state is set to be large, There is no need to change to a motor with a larger output. Without changing the motor, the number of rotations can be increased, and the operation of the horizontal flap from the first position to the second position becomes faster.

An air conditioning indoor unit according to a second aspect of the present invention is the air conditioning indoor unit according to the first aspect, wherein the control unit covers at least a part of a section in which the center of gravity of the horizontal flap moves from top to bottom in the first control mode. And controlling at least a part of a section in which the center of gravity of the horizontal flap moves from bottom to top in the second control mode.
In this air conditioning indoor unit, the vertical movement of the center of gravity of the horizontal flap is easy to understand, and it becomes easy to set the control in the control unit.

An air conditioning indoor unit according to a third aspect of the present invention is the air conditioning indoor unit according to the second aspect, wherein the horizontal flap is configured to be rotatable around a predetermined rotation fulcrum, and the control unit is configured to have a center of gravity of the horizontal flap. Is switched between the first control mode and the second control mode when it is at a predetermined position in the vicinity of a predetermined lower portion of the rotation fulcrum.

In this air conditioner indoor unit, the angle of the horizontal flap where the center of gravity of the horizontal flap is in the vicinity of the vertically lower part is almost constant, so that the switching between the first control mode and the second control mode can be performed in a short section. That is, it is possible to increase the rotation speed of the motor to the vicinity where the center of gravity of the horizontal flap is lowered to the lowest position (to be in the first control mode).

An air conditioning indoor unit according to a fourth aspect of the present invention is the air conditioning indoor unit according to the third aspect, further comprising a casing in which an air outlet is formed and a horizontal flap is attached to the air outlet, One posture is in the vicinity of the air outlet at the start of operation and faces the air outlet, the second posture is a substantially vertical posture before a predetermined position, and the third posture is a substantially vertical posture past the predetermined position. The posture is a posture in which the fourth posture passes a predetermined position and the center of gravity is raised above the third posture.

In this air conditioning indoor unit, the operation of the horizontal flap can be speeded up from the first posture to the second posture of the horizontal flap that faces the blower outlet at the start of operation (substantially closes the blower outlet). The time required to reach the second posture can be shortened.

An air conditioning indoor unit according to a fifth aspect of the present invention is the air conditioning indoor unit according to any one of the first to fourth aspects, and the motor is a stepping motor.
In this air conditioning indoor unit, by using a stepping motor, the number of rotations and the angle can be easily associated with each other, and the timing for switching the number of rotations can be accurately set.

In the air conditioning indoor unit according to the first aspect of the present invention, the operation time of the horizontal flap can be shortened without changing to a motor having a larger output than conventional.
In the air conditioning indoor unit according to the second aspect of the present invention, it is possible to prevent the setting of control from being difficult and difficult to handle.
In the air conditioning indoor unit according to the third aspect of the present invention, it is possible to take a long section for speeding up the operation of the horizontal flap, and to sufficiently bring out the effect of speeding up the operation of the horizontal flap.
In the air conditioning indoor unit pertaining to the fourth aspect of the present invention, the time from the first posture to the second posture can be shortened, and the waiting time at the start of operation can be shortened.
In the air conditioning indoor unit pertaining to the fifth aspect of the present invention, the posture control of the horizontal flap can be performed with high accuracy, and the operation speed can be increased.

The perspective view for demonstrating the general view of the air-conditioning indoor unit which concerns on one Embodiment of this invention. Sectional drawing at the time of operation stop of the air-conditioning indoor unit of FIG. The block diagram which shows the structure of the air-conditioning control apparatus of the air conditioning apparatus containing an air-conditioning indoor unit. The fragmentary perspective view for demonstrating the structure of the lower part of the air-conditioning indoor unit in the state where the horizontal flap opened the blower outlet. The partial expansion perspective view for demonstrating the structure of the lower part of the air-conditioning indoor unit in the state where the horizontal flap opened the blower outlet. (A) The schematic diagram of the vertical flap for demonstrating the stored state, (b) The schematic diagram of the vertical flap for demonstrating the state which has induced | guided | derived blowing air ahead. The timing chart for demonstrating operation | movement of the vertical flap in the position on a rack, a horizontal flap, and an auxiliary | assistant flap. (A) Schematic diagram of the cross section of the air conditioning indoor unit showing a state where the air outlet is closed by the horizontal flap, (b) Schematic diagram of the cross section of the air conditioning indoor unit showing the state where the horizontal flap has moved to the flap rubbing prevention position, (C) Schematic diagram of the cross section of the air conditioning indoor unit showing the fully open position of the rack member, (d) Schematic diagram of the cross section of the air conditioning indoor unit showing the attitude of the horizontal flap by the fully open position of the rack member, (e) Full opening of the link member The schematic diagram of the cross section of the air conditioning indoor unit which shows the attitude | position of the horizontal flap by a position, (f) The schematic diagram of the cross section of the air conditioning indoor unit which shows an example of the auxiliary | assistant flap wind direction angle position of an auxiliary | assistant flap. The flowchart for demonstrating operation | movement of the vertical flap in the position on a rack, a horizontal flap, and an auxiliary | assistant flap. The schematic diagram of the partial cross section of the air-conditioning indoor unit which shows the state by which the blower outlet is closed by the horizontal flap. The schematic diagram of the partial cross section of the air-conditioning indoor unit which shows the state which the horizontal flap moved to the flap rubbing prevention position. The schematic diagram of the partial cross section of the air-conditioning indoor unit which shows the state which the horizontal flap is rotating toward the lowermost part vicinity from the flap rubbing prevention position. The schematic diagram of the partial cross section of the air-conditioning indoor unit which shows the state which the horizontal flap is rotating in the lowermost vicinity. The schematic diagram of the partial cross section of the air-conditioning indoor unit which shows the full open state of a horizontal flap. The schematic diagram of the partial cross section of the air-conditioning indoor unit which shows the state which the horizontal flap moved to the setting position. The timing chart for demonstrating operation | movement of the vertical flap, horizontal flap, and auxiliary | assistant flap at the time of a driving | operation stop. (A) Schematic diagram of the partial cross section of the air conditioning indoor unit showing the state of the horizontal flap before operation stop, (b) Schematic diagram of the partial cross section of the air conditioning indoor unit showing the state where the rack member 57 has moved to the rack threshold angle position (C) Schematic diagram of a partial cross section of the air conditioning indoor unit showing a state in which the link member moves toward the low speed angle position and the horizontal flap is rotating at high speed, (d) the horizontal flap is near the lowermost part. Schematic diagram of the partial cross section of the air conditioning indoor unit showing the rotating state, (e) Schematic diagram of the partial cross section of the air conditioning indoor unit showing the fully opened state of the horizontal flap, (f) The operation was finished with the horizontal flap closed The schematic diagram of the partial cross section of the air-conditioning indoor unit which shows a state. The flowchart for demonstrating operation | movement of the vertical flap at the time of a driving | operation stop, a horizontal flap, and an auxiliary | assistant flap.

Hereinafter, an air-conditioning indoor unit according to an embodiment of the present invention will be described with reference to the drawings.
(1) Outline of Configuration of Air Conditioning Indoor Unit FIG. 1 is a perspective view showing an external appearance of an air conditioning indoor unit during operation. Moreover, FIG. 2 is sectional drawing which shows the state at the time of operation stop of the air-conditioning indoor unit which concerns on FIG. The air conditioning indoor unit 10 is a wall-hanging type, and includes an indoor heat exchanger 11, an indoor fan 12, a main body casing 13, a bottom frame 17, a filter 25, and an indoor control unit 41.
The main casing 13 has a three-dimensional shape including a front grill 13a, a front panel 13b, and a back plate 13c, and the indoor heat exchanger 11, the indoor fan 12, the bottom frame 17, the filter 25, and the indoor control unit 41 are included in the three-dimensional shape. Is settled. The front panel 13b covers the front surface of the front grill 13a and is rotatably supported by the front grill 13a by a hinge provided at the upper end thereof. The back plate 13c of the main casing 13 is attached to the wall via a mounting plate (not shown). A bottom frame 17 is attached in front of the back plate 13c, and the indoor heat exchanger 11 and the indoor fan 12 are attached to the bottom frame 17.

A suction port 22 is provided in the front upper portion of the front grill 13a. An air outlet 15 is provided on the lower surface of the main casing 13. The air outlet 15 is connected to the inside of the main body casing 13 by the air outlet passage 18, and the air outlet passage 18 is formed along the bottom frame 17 from the air outlet 15. The indoor air in the vicinity of the suction port 22 is sucked into the indoor fan 12 through the suction port 22, the filter 25 and the indoor heat exchanger 11 by the operation of the indoor fan 12, and from the blower outlet 18 through the blowout flow path 18 from the indoor fan 12. Blown out.
The indoor heat exchanger 11 has an inverted V shape in which both ends are bent downward in a side view, and the indoor fan 12 is positioned below the indoor heat exchanger 11. The indoor fan 12 is a cross-flow fan, blows air taken in from the room against the indoor heat exchanger 11, and then blows out the air from the air outlet 15 into the room. The indoor heat exchanger 11 exchanges heat with the passing air. A filter 25 is disposed between the front grill 13 a of the main casing 13 and the indoor heat exchanger 11. The filter 25 removes dust contained in the air that flows in toward the indoor heat exchanger 11.

As shown in FIG. 2, a vertical flap 20 is disposed in the blowout flow path 18. The vertical flap 20 is attached so that the angle can be changed with respect to the vertical plane. The vertical flap 20 is driven by a motor to be described later, and can take an arbitrary angle within a predetermined angle range toward the left and right side surfaces with respect to the front surface. Thereby, the vertical flap 20 can direct the blowing direction of the blown air from the front of the main body casing 13 in any direction within a predetermined angular range on the left and right.
Moreover, the horizontal flap 30 which guides the air which blows off from the blower outlet 15 is attached to the blower outlet 15 so that an angle can be changed with respect to a horizontal surface. The horizontal flap 30 is driven by a motor, which will be described later, and can open and close the air outlet 15 as well as change the air blowing direction in the vertical direction.

Further, an auxiliary flap 130 for assisting the horizontal flap 30 is attached to the rear edge of the air outlet 15 so that the angle with respect to the horizontal plane can be changed. The auxiliary flap 130 has a rotation shaft 130a that serves as a center of rotation on the rear edge side of the air outlet 15.
FIG. 3 is a block diagram showing the configuration of the air conditioning control device 40. The air conditioning control device 40 includes an indoor control unit 41 for controlling each device of the air conditioning indoor unit 10 and an outdoor control unit 42 for controlling each device of the air conditioning outdoor unit. The outdoor control unit 42 is connected by a signal line 43. The indoor control unit 41 is housed in an electrical component box in the front part of the main casing 13 and includes a CPU (Central Processing Unit) 41a, a storage unit 41b, and the like. Control of the motor that drives the flap 20, the horizontal flap 30, and the auxiliary flap 130 is performed.

The outdoor control unit 42 is connected to a compressor 74, an outdoor electric expansion valve 75, a four-way switching valve 76, an outdoor fan 77, a plurality of pressure sensors 78, a plurality of temperature sensors 79, and the like. The compressor 74, the outdoor electric expansion valve 75, and the four-way switching valve 76 are annularly connected to an indoor heat exchanger (not shown), the above-described indoor heat exchanger 11, and the like to constitute a refrigeration circuit. The air conditioner outdoor unit pressure sensor 78, temperature sensor 79, air conditioner indoor unit 10 temperature sensor 60, and the like appropriately perform air conditioning by the air conditioner outdoor unit and air conditioner indoor unit 10, so that the state of the refrigeration circuit, the state of air conditioning, and the environment It is a sensor for detecting a state.
The indoor control unit 41 is connected to a transmission / reception unit 44, a horizontal flap drive mechanism 51, a vertical flap drive mechanism 52, a cross flow fan motor 12a, a temperature sensor 60, a display unit 61, and the like. The indoor control unit 41 transmits and receives data between the user's remote controller and the transmission / reception unit 44 for control. The indoor control unit 41 controls the horizontal flap drive mechanism 51, the vertical flap drive mechanism 52, and the crossflow fan motor 12a according to the indoor state and user settings, etc., and the horizontal flap 30, the auxiliary flap 130, and the vertical flap 20 are controlled. By adjusting the angle and the state of swinging, and the rotation speed of the motor 12a for the cross flow fan, it is possible to change the blowing direction and the strength of blowing the conditioned air. The indoor control unit 41 uses state information such as the temperature of each part detected by a plurality of temperature sensors 60 or the like installed in the refrigerant circuit or each device for judgment for control. In addition, the indoor control unit 41 notifies the user or the like of the setting state or environment of the air conditioning indoor unit 10 via the display unit 61.

(2) Detailed Configuration (2-1) Horizontal Flap A detailed configuration of the horizontal flap 30 will be described with reference to FIGS. 1, 2, and 4. FIG. FIG. 4 is a partial perspective view for explaining the configuration of the lower part of the air-conditioning indoor unit in a state in which the horizontal flap opens the air outlet 15. The horizontal flap 30 is a substantially rectangular plate-like member, and is in a position that covers the opening of the air outlet 15 (hereinafter referred to as a fully closed position) when the air conditioning indoor unit 10 stops operating. The first surface 30 a that can be visually recognized from the outside in the fully closed position of the horizontal flap 30 constitutes a part of the lower surface of the main casing 13.
A first front connecting portion 311, a second front connecting portion 312 and a third front connecting portion 313 are provided on the second surface 30 b which is the back surface of the first surface 30 a of the horizontal flap 30. The 1st front connection part 311, the 2nd front connection part 312 and the 3rd front connection part 313 are the front end side of the 2nd surface 30b in the closed position of the horizontal flap 30, and are along the longitudinal direction of the 2nd surface 30b. They are arranged at almost equal intervals. The horizontal flap 30 rotates around a rotation shaft 310 connecting the first front connection part 311, the second front connection part 312 and the third front connection part 313. In addition, a first rear connection part 321 and a second rear connection part 322 are provided on the second surface 30 b of the horizontal flap 30. The first rear connecting portion 321 and the second rear connecting portion 322 are arranged at the center in the longitudinal direction of the second surface 30 b on the rear end side of the second surface 30 b in the closed position of the horizontal flap 30.

One end of three rod-shaped rack members 57 that bend and extend in an arc shape are connected to the first front connecting portion 311, the second front connecting portion 312 and the third front connecting portion 313, respectively. The rack member 57 is formed with a rack 57a of a rack and pinion mechanism on a convexly curved side surface, and takes a posture in which the rack 57a is directed obliquely upward in order to mesh with a pinion gear 55 described later.
As shown in FIG. 1, one end of a foldable link member 58 is connected to each of the first rear connecting part 321 and the second rear connecting part 322. The link member 58 has a configuration in which ends of two rod-shaped members are joined to each other so as to be foldable in order to be foldable. Of the two rod-like members of the link member 58, the upper side of the node 58c is called the upper link 58a, and the lower side is called the lower link 58b.

As shown in FIG. 4, a rack drive motor 51a is mounted inside the main casing 13, and a pinion gear 55 is attached to the rotation shaft of the rack drive motor 51a. The rack driving motor 51a is a stepping motor. The pinion gear 55 meshes with the rack 57a, and the rack driving motor 51a rotates the pinion gear 55 counterclockwise CCW when viewed from the left side, so that the rack member 57 moves toward the front of the air outlet 15. Thus, the operation in which the front portion of the horizontal flap 30 projects toward the front of the air outlet 15 is referred to as a first operation of the rack driving motor 51a. Conversely, the rack driving motor 51a rotates the pinion gear 55 clockwise, so that the rack member 57 moves backward toward the inner side of the main casing 13. This is called the second operation of the rack driving motor 51a.

Furthermore, a link drive motor 51b is mounted inside the main body casing 13, and a drive gear 56 is attached to the rotation shaft of the link drive motor 51b. The link driving motor 51b is a stepping motor. Further, a driven gear (not shown) is provided at the end of the upper link 58 a of the link member 58, and the link driving motor 51 b rotates the driven gear in the first direction via the driving gear 56. As a result, the central angle formed by the upper link 58a and the lower link 58b is expanded around the node 58c, and the rear portion of the horizontal flap 30 moves forward toward the front of the blowout port 15. This is called the first operation of the link driving motor 51b. Conversely, when the drive gear 56 rotates the driven gear in the second direction opposite to the first direction, the central angle formed by the upper link 58a and the lower link 58b is reduced around the node 58c, and the horizontal flap is reduced. The rear part of 30 retreats toward the outlet 15. This is called the second operation of the link driving motor 51b.

The first operation of the rack driving motor 51a and the first operation of the link driving motor 51b described above are performed simultaneously or successively, so that both the front end side and the rear end side of the horizontal flap 30 are blown. It approaches toward the front of the exit 15. Further, the second operation of the rack driving motor 51a and the second operation of the link driving motor 51b are executed simultaneously or successively, so that both the front end side and the rear end side of the horizontal flap 30 are blown. Retreat toward exit 15. The horizontal flap 30 can take various postures by a combination of the first operation and the second operation of the rack driving motor 51a and the first operation and the second operation of the link driving motor 51b.
(2-2) Auxiliary flaps As shown in FIG. 1, two auxiliary flaps 130 are provided along the longitudinal direction of the air outlet 15 at the rear portion of the air outlet 15. These two auxiliary flaps 130 have a rotating shaft 130 a shown in FIG. 2, and the rotating shaft 130 a is arranged in parallel with the longitudinal direction of the blowout port 15. These rotating shafts 130a are driven by an auxiliary flap driving motor 51c shown in FIGS. The auxiliary flap drive motor 51c is a stepping motor. As can be seen from FIG. 2, the auxiliary flap 130 has a width that covers almost half of the air outlet 15 from the rear edge of the air outlet 15 in a state in which the front end of the auxiliary flap 130 is most forward.

Two central support portions 131 that support one end of the rotating shaft 130a of the auxiliary flap 130 are provided at positions facing the central portion of the air outlet 15 in the main casing 13 (see FIG. 1). Further, a side support portion 132 that supports the other end of the rotating shaft 130 a of the auxiliary flap 130 is provided at the rear corner of the air outlet 15 in the main body casing 13.
As shown in FIG. 2, when the horizontal flap 30 is in the closed position, the auxiliary flap 130 is stored above the horizontal flap 30 in a posture substantially parallel to the horizontal flap 30, and from the outside. can not see. In the following description, this position where the auxiliary flap 130 is stored is referred to as an auxiliary flap storage position. When the auxiliary flap 130 is in the auxiliary flap storage position, the auxiliary flap 130 is close to the second surface 30b of the horizontal flap 30, and the space that the auxiliary flap 130 occupies the outlet flow path 18 is small. In the periphery and the blow-out flow path 18, interference with the vertical flap 20 that is fully open on the left and right is prevented. In the following description, a state in which the vertical flap 20 is fully opened on the left and right is referred to as a wide position. This wide position is also a storage position where the vertical flap 20 is stored.

(2-3) Vertical flap The vertical flap 20 has a plurality of blade pieces 201 and a connecting rod 203 for connecting the plurality of blade pieces 201 as shown in FIGS. Yes. In addition, as shown in FIG. 2, the vertical flap 20 is disposed above the second surface 30 b and the auxiliary flap 130 of the horizontal flap 30 in the closed position, that is, on the side close to the indoor fan 12 in the outlet flow path 18. Yes.
As shown in FIG. 5, the blade piece 201 is formed with a slit hole 201 a into which the connecting rod 203 is inserted on the air outlet 15 side, and is supported inside the main body casing 13 on the end on the indoor fan 12 side. A support portion 201b is formed. In addition, the blade piece 201 is formed with two slits 201c extending from the central portion toward the support portion 201b.

FIG. 6A shows a state in which the blade piece 201 is in a wide position during operation stop or operation, and FIG. 6B shows a state of the blade piece 201 in which air is blown out toward the front during operation. Is shown. The plurality of blade pieces 201 swing left and right around a state perpendicular to the longitudinal direction of the main casing 13 as the connecting rod 203 horizontally reciprocates along the longitudinal direction of the air outlet 15. The connecting rod 203 is reciprocated horizontally by the left flap drive motor 52a and the right flap drive motor 52b of the vertical flap drive mechanism 52. The left flap driving motor 52a and the right flap driving motor 52b are stepping motors. The left flap drive motor 52a and the right flap drive motor 52b are each attached to one end of a foldable arm 204. The other end of the arm 204 is connected to the central portion of the swing bar 205. The swinging rod 205 has one end connected to the fulcrum and the other end connected to the connecting rod 203. Therefore, as the left flap driving motor 52a and the right flap driving motor 52b rotate, the other end of the arm 204 swings the swinging rod 205 left and right, and the swinging rod 205 moves the connecting rod 203 around the fulcrum. Move back and forth horizontally.

The blade piece 201 not only swings but can stop at any angle by stopping the motor after swinging. Therefore, the blade piece 201 is a front blown state (see FIG. 6B) in which the air blowing state from the blowout port 15 is blown to the front side of the main body casing 13 or an oblique blown blown to the side surface side of the main body casing 13. The blown air can be guided to the left and right within a predetermined angle range such as the state (see FIG. 6A).
Further, as the blade piece 201 of the vertical flap 20 has a longer dimension in the blowing direction, the air at the side blowing can be directed in the target direction. Since the vertical flap 20 and the auxiliary flap 130 are greatly designed to improve the performance of the wind direction control, the blade piece 201 facing the direction closer to the front than the wide state is the auxiliary flap 130 at the auxiliary flap storage position. Interfere with.

(3) Flap operation In the following explanation of the flap operation, the explanation will be given with emphasis on speed control at the start and stop of the operation of the link drive motor 51b for moving the horizontal flap 30.
(3-1) Operation Start Operation at Position on Rack The operation start operation at the position on the rack by the vertical flap 20, the horizontal flap 30, and the auxiliary flap 130 will be described with reference to FIGS. The control described with reference to FIGS. 7 to 15 is an operation start operation when the blown air is blown out downward of the air conditioning indoor unit 10 mainly during heating. In order to direct the blown-out air downward, the indoor control unit 41 controls the attitude of the horizontal flap 30 with the rack member 57 raised (position on the rack). FIG. 7 is a timing chart showing operations of the vertical flap 20, the horizontal flap 30 and the auxiliary flap 130 at the start of operation on the rack position, and FIG. 9 is a flowchart for explaining the control of the indoor control unit 41. In FIG. 7, the position of the rack member 57 that supports the horizontal flap 30 is displayed as the rack position, the position of the link member 58 that supports the horizontal flap 30 is displayed as the link position, and the attitude of the auxiliary flap 130 is displayed as the auxiliary flap position. ing. Further, the posture of the vertical flap 20 is displayed in FIG. 7 as a left flap position and a right flap position divided into a left flap 20a and a right flap 20b shown in FIG.

In the indoor control unit 41, first, before the time t1 in FIG. 7, it is determined whether or not there is an instruction to start driving from a user or the like, or whether or not it is time to automatically start driving ( Step S1). Here, when it is determined that the operation is started, it is determined whether or not the wind direction control by the horizontal flap 30 is performed at the position on the rack (step S2). If it is determined in step S2 that the wind direction control at the position on the rack is performed, the operation after time t1 in FIG. 7 is started. If it is determined in step S2 that the wind direction control at the rack upper position is not performed, that is, the wind direction control at the rack lower position, but here, the explanation of the wind direction control at the rack lower position is as follows. Omitted.
When the time t1 has elapsed, the rack member 57 moves from the fully closed position Pr1 to the flap rubbing prevention rack position Pr2 (see FIG. 8B). When the time t1 has elapsed, the link member 58 moves from the fully closed position Pl1 to the flap rubbing prevention link position Pl2 simultaneously with the rack member 57. The fully closed position Pr1 of the rack member 57 and the fully closed position Pl1 of the link member 58 are positions of the rack member 57 and the link member 58 when the horizontal flap 30 closes the outlet 15 (FIG. 8A). (See FIG. 10). The position of the vertical flap 20 indicated by the dotted line in FIG. 10 is a position that can be taken during operation, and the vertical flap 20 at the dotted line position and the auxiliary flap 130 at the auxiliary flap storage position can be seen from FIG. Interfere with each other. The rotational speed of the link drive motor 51b when the link member 58 moves from the fully closed position Pl1 to the flap rubbing prevention link position Pl2 is the rotational speed γrpm (γ is a preset constant) in the second control mode. .

The purpose of moving the horizontal flap 30 from the fully closed state to the flap rubbing prevention position is to prevent the horizontal flap 30 from rubbing against the main body casing 13 by the opening operation of the rack member 57 and the link member 58. Further, the flap rubbing prevention rack position Pr2 of the rack member 57 and the flap rubbing prevention link position Pl2 of the link member 58 are the flap rubbing prevention position where the horizontal flap 30 does not hit the auxiliary flap 130 even when the auxiliary flap 130 is in the non-interference position. This is the position of the rack member 57 and the link member 58 when the horizontal flap 30 is at the center.
Further, when the time t1 has elapsed, the auxiliary flap 130 also moves toward the fully closed position Pa4, and the origin is determined. In FIG. 7, the portion indicated by the dotted line between time t1 and time t2 is the state in which the auxiliary flap 130 reaches the fully closed position Pa4 and cannot move further in the closing direction, and is not moved by the auxiliary flap driving motor 51c. A state where torque is applied is shown. As a result, the state in which the auxiliary flap 130 is surely positioned at the fully closed position Pa4, that is, the origin search is performed.

At time t2, the horizontal flap 30 reaches the flap rubbing prevention position as shown in FIG. 11, and the auxiliary flap 130 is in a state where the origin is finished (step S3). Next, the auxiliary flap 130 moves to the non-interference position Pa3 (step S4). The non-interference position Pa3 is a position where the auxiliary flap 130 and the vertical flap 20 do not contact each other regardless of the direction of the vertical flap 20 (see FIGS. 8C, 8D, and 8F). ). At time t2, the vertical flap 20 has the left flap 20a in the left fully open position (left flap wide position) Pn3 and the right flap 20b in the right fully open position (right flap wide position) Pm1. The right fully open position Pm1 is a state in which the right flap 20b is closest to the right side surface of the main casing 13, and is a position for guiding the blown air toward the right side (see FIG. 6A). The left fully open position Pn3 is a state in which the left flap 20a is closest to the left side surface of the main casing 13, and is a position for guiding the blown air toward the left side (see FIG. 6A).

At time t3, since the auxiliary flap 130 has reached the non-interference position Pa3, even if the vertical flap 20 moves, it does not interfere with the auxiliary flap 130. Therefore, the memory angular positions of the right flap 20b and the left flap 20a of the vertical flap 20 The movement to Pm2 and Pn2 is started (step S5). The memory angular positions Pm2 and Pn2 are positions between the right fully opened positions Pm1 and Pn1 and the left fully opened positions Pm3 and Pn3 and can be changed by the setting of the user, for example, when facing the front (see FIG. 6B). )and so on.
At time t3, the rack member 57 starts to move from the flap rubbing prevention rack position Pr2 toward the fully open position Pr5. This is because the origin of the rack member 57 is performed at the fully open position Pr5 (step S5). The fully open position Pr5 of the rack member 57 is a position where the rack member 57 extends most when the horizontal flap 30 is opened (see FIG. 8C). The origin of the rack member 57 is set before and after the time t4, and the operation indicated by the dotted line near the time t4 is performed in the direction in which the rack member 57 is further extended with respect to the rack member 57 at the fully open position Pr5. This is an operation for driving the drive motor 51a. As a result, the state in which the rack member 57 is reliably located at the fully open position Pr5, that is, the origin search is performed.

When the origin of the rack member 57 is finished after the time t4 has elapsed, the rack member 57 moves to the rack upper position Pr3 (step S6). At time t5, the movement of the rack member 57 to the rack upper position Pr3 is completed. The on-rack position Pr3 is a position of the rack member 57 that is mainly used when the air direction control for blowing the blown air downward is performed (see FIGS. 8D, 8E, and 8F). .
At time t6, the movement of the link member 58 toward the fully open position Pl5 is started in order to find the origin of the link member 58. At this time, since the center of gravity 30g of the horizontal flap 30 starts to move from the top to the bottom, the

rear connection parts

321 and 322 are pulled by gravity with the

front connection parts

311, 312 and 313 as fulcrums. Since the torque required for the link driving motor 51b is reduced by the action of gravity, the link driving motor 51b is controlled in the first control mode by the indoor control unit 41, and the rotational speed γrpm in the second control mode. It rotates at a larger rotation speed βrpm (β is a preset constant) (step S7). Therefore, the horizontal flap 30 rotates around the rotation shaft 310 passing through the front connecting

portions

311, 312, and 313 at a higher speed than when moving at time t1. FIG. 12 shows a state in which the link driving motor 51b rotates at the rotation speed βrpm and the horizontal flap 30 moves at a high speed in the first control mode.

At time t7, as shown in FIG. 13, the center of gravity 30g of the horizontal flap 30 reaches the vicinity of the rotating shaft 310 in the vertically lower part. In order to further move the rear edge side of the horizontal flap 30 forward from the state of FIG. 13, the center of gravity 30g of the horizontal flap 30 moves upward, so that a large torque is required for the link driving motor 51b. Therefore, in the state of FIG. 13, the indoor control unit 41 switches from the first control mode to the second control mode, and changes the rotation speed of the link drive motor 51b to γ rpm. The indoor control unit 41 determines whether or not the state shown in FIG. 13 has been reached, that is, whether or not the low speed angular position Pl3 has been reached, depending on how many times the link driving motor 51b has been rotated from the fully closed position Pl1. (Step S8). The number of rotations of the link driving motor 51b from the fully closed position Pl1 is detected from the number of pulses given by the indoor control unit 41 to the link driving motor 51b.

The link driving motor 51b is moved at the rotational speed γ rpm from the low speed angular position P13 to the fully open position Pl5 and moved (step S9). FIG. 14 shows a state in which the link member 58 has reached the fully open position Pl5. The fully open position Pl5 is a position where the link member 58 extends most when the horizontal flap 30 is opened (see FIG. 8E). At time t8, the link member 58 reaches the fully open position Pl5, and the origin of the link member 58 is determined after time t8 (step S10). The origin of the link member 58 is determined after the time t8, and the operation indicated by the dotted line after the time t8 further moves the link member 58 to the upper link 58a with respect to the link member 58 at the fully open position Pl5. This is an operation of driving the link driving motor 51b in a direction to widen the angle formed by the lower link 58b.
At time t9, in order to make the horizontal flap 30 and the auxiliary flap 130 follow the setting of the user or the like, as shown in FIG. 15, the link member 58 is moved to the link memory while the rack member 57 is held at the rack upper position Pr3. While moving to the angular position Pl4, the auxiliary flap 130 is moved to the auxiliary flap wind direction angular position Pa2 (step S11). The link memory angle position Pl4 is a position of the link member 58 for realizing the posture of the horizontal flap 30 stored before the operation stop. The auxiliary flap wind direction angle position Pa <b> 2 is an example of a position where the auxiliary flap 130 performs the wind direction control, and is a position that can be changed by setting of a user or the like (see FIG. 8F). Therefore, the link memory angle position Pl4 and the auxiliary flap wind direction angle position Pa2 can be changed according to an instruction from a user or the like. As can be seen by comparing FIG. 14 and FIG. 15, the direction in which the horizontal flap 30 moves from the state of FIG. 14 to the state of FIG. 15 is the direction in which the center of gravity 30g moves downward. In this case, the link driving motor 51b is rotated at the rotational speed γ rpm in the second control mode, with an emphasis on stopping at the link memory angular position Pl4 with accuracy rather than moving at high speed.

(3-2) Operation Stop Operation Next, the operation stop operation at the position below the rack by the vertical flap 20, the horizontal flap 30, and the auxiliary flap 130 will be described with reference to FIGS. FIG. 16 is a timing chart showing the operation when the vertical flap 20, the horizontal flap 30 and the auxiliary flap 130 are stopped, and FIG. 18 is a flowchart for explaining the control of the indoor control unit 41 when the operation is stopped.
First, in the indoor control unit 41, as shown in FIG. 18, before the time t11 in FIG. 16, it is determined whether or not the user has instructed to stop the operation, or at the time when the operation is automatically stopped. A determination is made as to whether or not (step S11). When there is a stop instruction from a user or the like, the indoor control unit 41 temporarily stops the operations of the vertical flap 20 and the horizontal flap 30 (step S12), and starts the operation after time t11 in FIG. From time t11 to time t19, as shown in FIG. 18, the operation of the horizontal flap 30 and the operations of the vertical flap 20 and the auxiliary flap 130 proceed independently in parallel (steps S13 to S19). ).

After the time t11 has elapsed (see FIG. 17A), the rack member 57 moves to the rack threshold angle position Pr6 (FIG. 17B). The rack threshold angle position Pr6 is a position provided between the rack upper position Pr3 and the flap rubbing prevention rack position Pr2. In addition, when the time t11 has elapsed, in parallel with the movement of the rack member 57, the vertical flap 20 also starts moving toward the wide position (step S18). The vertical flap 20 is moved to the wide position by moving the right flap 20b to the right fully open position Pm1 and moving the left flap 20a to the left fully open position Pn3. The position of the vertical flap 20 indicated by the solid line in FIG. 17B is the wide position.
At time t12, in the horizontal flap 30, the rack member 57 reaches the rack threshold angle position Pr6 (step S13), and the link member 58 starts to move from the link memory angle position Pl6 toward the fully open position Pl5. Here, the link memory angular position Pl6 is a position in which the link member 58 is relatively close to the flap rubbing prevention link position Pl2, and the link member 58 is closed more than the low speed angular position Pl3. FIG. 17C shows a state in which the horizontal flap 30 is rotating at a high speed, and the center of gravity 30g of the horizontal flap 30 is moving downward, so that the link driving motor 51b is in the first control mode. The rotation speed is β rpm.

At time t13, as shown in FIG. 17D, the link member 58 reaches the low speed angular position Pl3, and the center of gravity 30g of the horizontal flap 30 reaches the vicinity of the rotating shaft 310 in the vertically lower part. Therefore, in the state of FIG. 17D, the indoor control unit 41 switches from the first control mode to the second control mode, and changes the rotation speed of the link drive motor 51b to γ rpm (step S15). Then, between time t13 and time t14, the horizontal flap 30 moves toward the fully open position Pl5 at a normal speed (step S16).
At time t14, the link member 58 has reached the fully open position Pl5, and origin search is performed (step S17). At time t14, the origin of the vertical flap 20 is determined. At time t15, when the vertical flap 20 has already finished moving to the wide position, the auxiliary flap 130 moves toward the fully closed position Pa4.

At time t16, the link member 58 that has finished the origin start to move toward the flap rubbing prevention link position Pl2. The movement of the horizontal flap 30 at this time is performed at a normal speed while remaining in the first control mode.
At time t18, the movement of the link member 58 to the flap rubbing prevention link position P12 is completed, the movement of the auxiliary flap 130 to the fully closed position Pa4 is also completed (step S19), and the auxiliary flap 130 is in the fully closed position. Origin search is performed at Pa4.
At time t19, the rack member 57 starts to move from the threshold angle position Pr6 to the flap rubbing prevention rack position Pr2.
At time t20, the movement of the rack member 57 to the flap rubbing prevention rack position Pr2 is completed, and the movement of the horizontal flap 30 to the flap rubbing prevention position is completed. At this time, the indoor control unit 41 detects that the movement of the horizontal flap 30 to the flap rubbing prevention position and the movement of the auxiliary flap 130 to the fully closed position Pa4 are completed, and determines to proceed to the next step. (Step S20).

At time t <b> 21, the rack member 57 is moved to the fully closed position Pr <b> 1 and the link member 58 is moved to the fully closed position Pl <b> 1, so that the horizontal flap 30 is fully closed, that is, the air outlet 15 is covered with the horizontal flap 30. (Step S21). At time t22, the rack member 57 and the link member 58 are tightened. This retightening gives an instruction that the rack driving motor 51a and the link driving motor 51b further rotate the horizontal flap 30 in the closing direction even when the horizontal flap 30 hits the main body casing 13 and does not close any further. Thus, the horizontal flap 30 is pressed against the main casing 13 by the torque of the rack driving motor 51a and the link driving motor 51b. By this retightening, the horizontal flap 30 closes the air outlet 15 without loosening.
When the tightening is finished, the operations of the vertical flap 20, the horizontal flap 30, and the auxiliary flap 130 when the operation is stopped are finished. FIG. 17 (f) shows a state in which the retightening at time t22 has been completed.

(4) Features (4-1)
As described above, the horizontal flap 30 of the air conditioning indoor unit 10 according to this embodiment controls, for example, the posture at the time t6 at the start of operation shown in FIG. The posture change state (first posture change state) of the horizontal flap 30 from time t6 to time t7 in FIG. 7 that changes from the one posture) to the posture (second posture) close to the posture shown in FIG. . Here, the posture (first posture) at time t6 is a state in which the rack member 57 is at the rack upper position Pr3 and the link member 58 is substantially at the flap rubbing prevention link position Pl2. The posture immediately before time t7 (second posture) is a state in which the rack member 57 is at the rack upper position Pr3 and the link member 58 is immediately before the low-speed angular position Pl3.

Further, the horizontal flap 30 changes from the posture (third posture) immediately after time t7 in FIG. 7 to the posture at time t8 (fourth posture), and the posture change of the horizontal flap 30 from time t7 to time t8 in FIG. The state (second posture change state) can be taken. Here, the posture immediately after time t7 (third posture) is a state in which the rack member 57 is at the rack upper position Pr3 and the link member 58 is immediately after the low speed angular position Pl3. The posture at time t8 (fourth posture) is a state in which the rack member 57 is at the rack upper position Pr3 and the link member 58 is at the fully open position Pl5.
The indoor control unit 41 (the control unit according to claim 1) performs the link drive motor 51b in the posture change state (first posture change state) of the horizontal flap 30 from time t6 to time t7 in FIG. And a second control mode for controlling the link driving motor 51b in the posture change state (second posture change state) of the horizontal flap 30 from time t7 to time t8 in FIG. have.

The horizontal flap 30 is horizontal from time t6 to time t7 in FIG. 7 rather than the torque of the motor (torque required for driving) that can drive the posture change state of the horizontal flap 30 from time t7 to time t8 in FIG. In this configuration, the torque of the motor (torque required for driving) that can drive the flap 30 in the posture change state is smaller. The rotation speed βrpm in the first control mode is set so that the rotation speed per unit time of the motor is larger than the rotation speed γrpm of the link drive motor 51b in the second control mode.
In this air conditioner indoor unit 10, the torque of the motor capable of driving the posture change state of the horizontal flap 30 from time t6 to time t7 in FIG. 7 is the posture change state of the horizontal flap 30 from time t7 to time t8 in FIG. Therefore, even if the rotational speed in the first posture change state is set to be large, it is not necessary to change to a motor having a larger output than in the conventional case. This is because the link driving motor 51b used here is a stepping motor, and in the driving region of the horizontal flap 30, the torque that can be generated by the link driving motor 51b is reduced when the rotational speed is increased. Thus, the rotation speed can be increased without changing to a motor with a large output, and the posture of the horizontal flap 30 at time t6 (first posture) is changed to the posture immediately before time t7 (second posture). Will be faster.

The same thing is done when the operation is stopped as shown in FIG. The rack member 57 at time t12 is linked at the rack threshold angular position Pr6 and the link member 58 is linked from the attitude of the horizontal flap 30 at the link memory angular position Pl6 (first attitude) to the rack member 57 at time t13 at the rack threshold angular position Pr6. The posture change state in which the member 58 changes to the posture (second posture) of the horizontal flap 30 immediately before the low speed angular position Pl3 is the first posture change state. Further, the rack member 57 at time t14 is at the rack threshold angle from the posture (third posture) of the horizontal flap 30 immediately after the rack member 57 at time t13 is at the rack threshold angle position Pr6 and the link member 58 is at the low speed angular position Pl3. The posture change state in which the link member 58 changes to the posture (fourth posture) of the horizontal flap 30 at the fully open position Pl5 at the position Pr6 is the second posture change state. In this first posture change state, the indoor control unit 41 rotates the link driving motor 51b in the first control mode at the rotation speed β rpm, and in this second posture change state, the indoor control unit 41 causes the link driving motor 51b to rotate. In the second control mode, the rotation speed is γ rpm.

(4-2)
The indoor control unit 41 is a section from time t6 to time t7 in FIG. 7 or from time t12 to time t13 in FIG. 16 which is at least a part of the section in which the center of gravity 30g of the horizontal flap 30 moves from top to bottom in the first control mode. This section is controlled. Further, the second control mode controls at least part of the section in which the center of gravity 30g of the horizontal flap 30 moves from bottom to top, and the section from time t7 to time t8 in FIG. 7 and the section from time t13 to time t14 in FIG. To do. These sections in which the vertical movement of the center of gravity 30g of the horizontal flap 30 continues are easy to understand, and the control in the indoor control unit 41 can be easily set. For example, the movement in these sections can be set by the number of pulses of the link driving motor 51b, which is a stepping motor, and the control can be easily set.
(4-3)
The horizontal flap 30 is configured to be rotatable about a rotation shaft 310 (predetermined rotation fulcrum). For example, as shown in FIG. 13, the indoor control unit 41 performs the first control mode and the second control mode when the center of gravity 30 g of the horizontal flap 30 is at a predetermined position near the vertical lower side of the rotation shaft 310. Switch. The predetermined position in this case is the position of the horizontal flap 30 in which the rack member 57 is at the rack upper position pr3 and the link member 58 is at the low speed angular position Pl3 at the start of operation shown in FIG.

As described above, since the angle of the horizontal flap 30 in which the center of gravity 30g of the horizontal flap 30 is in the vicinity of the vertically lower part is substantially constant, switching between the first control mode and the second control mode can be performed in a short section. In other words, the rotational speed of the link driving motor 51b is driven at a high rotational speed βrpm until the center of gravity 30g of the horizontal flap 30 is lowered to the lowest position (low speed angular position Pl3) (in the first control mode). Can be).
(4-4)
The horizontal flap 30 is a posture in which the first posture is in the vicinity of the air outlet 15 at the start of operation and faces the air outlet 15, for example, a posture close to FIG. 11. In the horizontal flap 30, the second posture is a substantially vertical posture before a predetermined position (for example, the posture in FIG. 13), and the third posture is a substantially vertical posture after the predetermined position (for example, the posture in FIG. 13). The fourth posture is a posture (for example, the posture of FIG. 14) in which the center of gravity 30g is raised above the third posture after passing the predetermined position. In this air conditioner indoor unit 10, the operation of the horizontal flap 30 from the posture of the horizontal flap 30 facing the blowout port 15 (mostly closing the blowout port 15) to the posture shown in FIG. 13 at the start of operation. For example, the time from the posture of FIG. 11 to the posture of FIG. 13 can be shortened.

(4-5)
The link driving motor 51b (the motor according to claim 5) is a stepping motor. By using the stepping motor in this way, the number of rotations and the angle can be easily matched with the number of pulses, and the timing for switching the number of rotations can be set with high accuracy.
(5) Modification (5-1)
In the air conditioning indoor unit 10 of the above embodiment, the case where the second posture and the third posture are substantially the same has been described. For example, a plurality of low-speed angular positions Pl3 may be provided and the speed may be switched stepwise. . In such a case, the second posture and the third posture may be different from each other. For example, a low speed angular position Pl3-1 and a low speed angular position Pl3-2 are provided, and the rotational speed is β rpm until the low speed angular position Pl3-1, and the rotational speed is γ rpm after the low speed angular position Pl3-2. And between the low speed angular positions Pl3-1 and Pl3-2, the rotational speed is (β + γ) / 2.

(5-2)
In the above embodiment, the rotational speed of the link drive motor 51b is switched when the horizontal flap 30 is opened from the closed state. Conversely, the rotational speed is switched when shifting from the open state to the closed state. May be.
For example, the indoor control unit 41 may be controlled in the first control mode from time t16 to time t17 in FIG. 16, and the link driving motor 51b may be rotated at the rotation speed βrpm. In that case, during the state shown in FIG. 13 from the state shown in FIG. 14, the link member 58 is driven by the link driving motor 51b that rotates at the rotational speed β rpm and moves at a high speed.
(5-3)
In the above embodiment, the rotation speed of the link driving motor 51b is switched. However, the rack driving motor 51a that drives the rack member 57 is also a stepping motor, and the rotation of the rack driving motor 51a is performed like the link driving motor 51b. It can be configured to switch the number.

When switching the number of rotations of the rack driving motor 51a, the first operation in which the front portion of the horizontal flap 30 urges toward the front of the air outlet 15 is performed at high speed, and the rack member 57 is moved to the back side of the main body casing 13. The second operation that moves backward is configured to be performed at a lower speed than the first operation. In this case, the first control mode and the second control mode may be switched depending on the rotation direction. However, the first control mode and the second control mode may be switched by combining the rotation direction and the operation state.
(5-4)
In the above embodiment, the case where the rotation speed of the link driving motor 51b is switched when the operation is started at the position on the rack and the time when the operation is stopped has been described. However, the case where the operation at the position below the rack is started or the wind direction control is performed. The rotational speed of the link driving motor 51b may be switched in other scenes.

(5-5)
In the above embodiment, the case where the driving speed of the link member 58 acting away from the rotating shaft 310 is switched has been described. For example, the rotating shaft 130a is driven by the auxiliary flap driving motor like the rotating shaft 130a of the auxiliary flap 130. The present invention can be applied even when driving directly by 51c. Even in such a configuration, when the center of gravity of the flap is lowered, only a smaller torque is required than when the center of gravity of the flap is lowered. Can be set larger than the number of rotations.
(5-6)
Although the said embodiment demonstrated the case where the vertical flap 20, the horizontal flap 30, and the auxiliary | assistant flap 130 were controlled by the indoor control part 41 (control part of Claim 1) inside the main body casing 13, A part or all of the control may be performed by the outdoor control unit 42 outside the main body casing 13 of the air conditioning indoor unit 10. In such a case, the air conditioning control device 40 and the outdoor control unit 42 correspond to the control unit described in claim 1.

DESCRIPTION OF SYMBOLS 10 Air conditioning indoor unit 13 Main body casing 15 Outlet 20 Left and right blades 30 Horizontal flap 41 Indoor control part 51b Link drive motor 130 Auxiliary flap

JP 2007-40628 A

Claims

A horizontal flap (30) capable of taking a first posture change state changing from the first posture to the second posture and a second posture change state changing from the third posture to the fourth posture in order to control the wind direction in the vertical direction; ,
A motor (51b) for driving the horizontal flap;
A control unit (41) having a first control mode for controlling the motor in the first posture change state and a second control mode for controlling the motor in the second posture change state;
With
The horizontal flap is configured such that the torque of the motor capable of being driven in the first posture change state is smaller than the torque of the motor capable of being driven in the second posture change state,
The air conditioning indoor unit, wherein the control unit is set such that the number of rotations per unit time of the motor is greater in the first control mode than in the second control mode.
The control unit controls at least a part of a section in which the center of gravity of the horizontal flap moves from top to bottom in the first control mode, and the center of gravity of the horizontal flap moves from bottom to top in the second control mode. Control at least part of the leg,
The air conditioning indoor unit according to claim 1.
The horizontal flap is configured to be rotatable around a predetermined rotation fulcrum,
The control unit switches between the first control mode and the second control mode when the center of gravity of the horizontal flap is at a predetermined position in the vicinity of a vertically lower side of the predetermined rotation fulcrum.
The air conditioning indoor unit according to claim 2.
Further comprising a casing (13) in which an air outlet (15) is formed and the horizontal flap is attached to the air outlet;
The horizontal flap is a posture in which the first posture is in the vicinity of the air outlet when starting operation and faces the air outlet, and the second posture is a substantially vertical posture before the predetermined position, The third posture is a substantially vertical posture past the predetermined position, and the fourth posture is a posture where the center of gravity is raised above the third posture after passing the predetermined position.
The air conditioning indoor unit according to claim 3.
The motor is a stepping motor;
The air conditioning indoor unit according to any one of claims 1 to 4.