JP2014122738A - Air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve problems on generation of wind noise and need of usage of a motor of large driving torque to drive an auxiliary vertical wind direction plate when the auxiliary vertical wind direction plate is disposed on a face extended from a first upper wall portion.SOLUTION: An air conditioner includes a blower fan 3, a vertical wind direction plate 6, and an auxiliary vertical wind direction plate 7 turnably supported at an upper part of the vertical wind direction plate 6, and an upper wall portion 15 of an air flow channel has a first upper wall portion 16 inclined downward to a front part, and a second upper wall portion 17 disposed to expand the air flow channel at a front part of the first upper wall portion 16. The auxiliary vertical wind direction plate 7 is turnable within a vertical range including a face S extended from the first upper wall portion 16, and a turning speed at a time when the auxiliary vertical wind direction plate 7 is positioned on the face S (range β), is slower than that at a time when the auxiliary vertical wind direction plate 7 is positioned above the face S (range α).

Description

  The present invention relates to an air conditioner in which an up-and-down wind direction plate and an auxiliary up-and-down wind direction plate are arranged in the vicinity of an air outlet.

  The conventional air conditioner includes a blower fan arranged in an air flow path from the suction port to the blowout port, a vertical wind direction plate arranged near the blowout port, and an auxiliary vertical plate arranged above the vertical wind direction plate. Some are equipped with wind direction plates. The vertical wind direction plate and the auxiliary vertical wind direction plate are rotatably supported and extend along the longitudinal direction of the air outlet. Further, in this air conditioner, the upper wall portion of the air flow path leading to the air outlet has a first upper wall portion that is inclined downward toward the front, and the air flow channel expands in front of the first upper wall portion. The auxiliary upper and lower wind direction plates are arranged on the second upper wall side from the surface extending from the first upper wall.

JP 2009-79846 A

  By the way, in the above air conditioner, the auxiliary up-and-down wind direction plate may perform a swing operation over an upper range and a lower range of a surface extending from the first upper wall portion. However, since the lower range of the surface extending the first upper wall portion has a larger air volume than the upper range, a wind noise is generated when the auxiliary vertical wind direction plate is on the surface extending the first upper wall portion. There's a problem. Further, when the auxiliary up-and-down wind direction plate is on the surface extending from the first upper wall portion, since the resistance of the air volume is large, it is necessary to use a motor having a large driving torque.

  Therefore, an object of the present invention is to provide an air conditioner that can suppress the generation of wind noise and can use a motor with a small driving torque when the auxiliary up-down wind direction plate is on a surface extending the first upper wall portion. Is to provide.

  An air conditioner according to a first aspect of the present invention includes a blower fan disposed in an air flow path from a suction port to a blowout port, a vertical wind direction plate supported rotatably in the vicinity of the blowout port, and the vertical wind direction. An auxiliary vertical wind direction plate rotatably supported above the plate, wherein the upper wall portion of the air flow path is inclined downward toward the front, and the first upper wall portion And the second upper wall portion arranged so that the air flow path is widened, and the auxiliary up-and-down wind direction plate is rotatable in a vertical range including a surface extending from the first upper wall portion. The rotation speed when the auxiliary vertical wind direction plate is on the surface is slower than the rotation speed when the auxiliary vertical wind direction plate is above the surface.

  In this air conditioner, the auxiliary up-and-down wind direction plate is rotatable in a vertical range including the surface extending from the first upper wall portion, and the auxiliary up-and-down air direction plate is on the surface extending from the first upper wall portion. Since the rotation speed at a certain time is slower than the rotation speed when the auxiliary vertical wind direction plate is above the surface extending the first upper wall portion, the auxiliary vertical wind direction plate is on the surface extending the first upper wall portion. In this case, the generation of wind noise can be suppressed, and a motor having a small driving torque can be used as a motor for driving the auxiliary vertical wind direction plate.

  In the air conditioner pertaining to the second invention, in the air conditioner pertaining to the first invention, the rotational speed when the auxiliary up-down wind direction plate is below the surface is such that the auxiliary up-down wind direction plate is greater than the surface. It is characterized by being slower than the rotational speed when it is above.

  In this air conditioner, when the auxiliary vertical wind direction plate is below the surface extending the first upper wall portion, the rotational speed when the auxiliary vertical wind direction plate is above the surface extending the first upper wall portion is As a motor for driving the auxiliary up-and-down wind direction plate, it is possible to suppress the generation of wind noise even when the auxiliary up-and-down wind direction plate is below the surface extending from the first upper wall portion. A motor with a small driving torque can be used.

  In the air conditioner according to the third aspect of the invention, in the air conditioner according to the first or second aspect of the invention, the auxiliary up-and-down wind direction plate performs a swing operation in a vertical range including the surface during heating operation. It is characterized by being.

  In this air conditioner, when the auxiliary up-and-down wind direction plate performs a swing operation in the up-and-down direction range including the surface extended from the first upper wall during heating operation, the generation of wind noise is suppressed. it can.

  In the air conditioner pertaining to the fourth invention, in the air conditioner pertaining to the first or second invention, the auxiliary up-and-down wind direction plate is disposed above the surface during cooling operation, and the up-and-down wind direction plate Is fixed below the surface when fixed downward from a predetermined position.

  In this air conditioner, the auxiliary up-and-down wind direction plate is disposed above the surface extending from the first upper wall during cooling operation, and the first up-down wind direction plate is fixed downward from a predetermined position. When the upper wall portion is disposed below the extended surface, the generation of wind noise can be suppressed.

  As described above, according to the present invention, the following effects can be obtained.

  In the first invention, the auxiliary up-down wind direction plate is rotatable in a vertical range including the surface extending the first upper wall portion, and the auxiliary up-down wind direction plate is on the surface extending the first upper wall portion. Since the rotation speed at a certain time is slower than the rotation speed when the auxiliary vertical wind direction plate is above the surface extending the first upper wall portion, the auxiliary vertical wind direction plate is on the surface extending the first upper wall portion. In this case, the generation of wind noise can be suppressed, and a motor having a small driving torque can be used as a motor for driving the auxiliary vertical wind direction plate.

  In the second invention, when the auxiliary vertical wind direction plate is below the surface extending the first upper wall portion, the rotation speed when the auxiliary vertical wind direction plate is below the surface extending the first upper wall portion is As a motor for driving the auxiliary up-and-down wind direction plate, it is possible to suppress the generation of wind noise even when the auxiliary up-and-down wind direction plate is below the surface extending from the first upper wall portion. A motor with a small driving torque can be used.

  In 3rd invention, it suppresses that a wind noise is generated when an auxiliary up-and-down wind direction board performs swing operation in the up-and-down direction range including the field which extended the 1st upper wall part at the time of heating operation. it can.

  In the fourth invention, the auxiliary up-and-down wind direction plate is disposed above the surface extending from the first upper wall during cooling operation, and the first up-down wind direction plate is fixed downward from the predetermined position. When the upper wall portion is disposed below the extended surface, the generation of wind noise can be suppressed.

1 is an external view of an air conditioner according to an embodiment of the present invention. It is sectional drawing of the air conditioner shown in FIG. It is a figure explaining the structure of an auxiliary | assistant vertical wind direction board. It is sectional drawing of the air conditioner shown in FIG. 1, Comprising: It is a figure which shows the rotation range of an auxiliary | assistant vertical wind direction board. It is a schematic diagram which shows the rotation range and rotation speed of an auxiliary | assistant vertical wind direction board. It is sectional drawing of the air conditioner shown in FIG. 1, Comprising: It is a figure which shows the arrangement | positioning position of an auxiliary | assistant vertical wind direction board at the time of air_conditionaing | cooling operation when an up-and-down wind direction board is arrange | positioned below from a predetermined position. It is a functional block diagram of the air conditioner shown in FIG. It is a flowchart which shows the flow of the air conditioner shown in FIG.

  Hereinafter, an air conditioner according to an embodiment of the present invention will be described with reference to the drawings.

[Configuration of air conditioner]
An air conditioner according to an embodiment of the present invention includes an indoor unit 1 shown in FIG. 1 and an outdoor unit (not shown). The indoor unit 1 has an elongated shape in one direction as a whole, and is installed on the wall surface of the room so that its longitudinal direction is horizontal. In the following description, the direction protruding from the wall to which the indoor unit 1 is attached is referred to as “front”, and the opposite direction is referred to as “rear”. Further, the left-right direction shown in FIG. 1 is simply referred to as “left-right direction”.

[Indoor unit 1]
As shown in FIG. 2, the indoor unit 1 includes a casing 2, a blower fan 3 housed in the casing 2, a heat exchanger 4, a left / right wind direction plate 5, an up / down wind direction plate 6, an auxiliary up / down wind direction plate 7, and the like. ing.

  The casing 2 includes a substantially rectangular parallelepiped grill 11 and a front panel 12 that covers the front surface of the grill 11. A suction port 13 that is a grid-like opening that is long in the left-right direction is formed on the upper surface of the grill 11, and an air outlet 14 that is a rectangular opening that is long in the left-right direction is formed on the lower surface of the grill 11. Yes. During the air conditioning operation, the air sucked from the suction port 13 is driven or cooled in the heat exchanger 4 by driving the blower fan 3 disposed in the air flow path from the suction port 13 to the blower outlet 14. After that, the air is blown into the room from the air outlet 14.

<Air channel>
As shown in FIG. 2, the upper wall portion 15 of the air flow path extending from the left and right wind direction plates 5 to the blower outlet 14 among the air flow paths extending from the suction inlet 13 to the blowout outlet 14 is inclined first downward. The first upper wall portion 16 and the second upper wall portion 17 arranged so that the air flow path is widened in front of the first upper wall portion 16 are formed. Specifically, the second upper wall portion 17 extends substantially horizontally toward the front, and is disposed so as to expand upward by about 30 ° with respect to the surface S extending the first upper wall portion 16. ing. Moreover, the lower wall part 18 of the air flow path from the left-right wind direction board 5 to the blower outlet 14 is formed by the grill 11, and inclines downward toward the front. The lower wall portion 18 side (downward and downward range) from the surface S extending the first upper wall portion 16 is the second upper wall portion 17 side (upward and upward) from the surface S extending the first upper wall portion 16. The air volume of the air blown from the blower fan 3 is larger than the range (range).

<Up-down wind direction plate 6>
As shown in FIG. 2, the vertical wind direction plate 6 is disposed in the vicinity of the air outlet 14, and is supported by the support member 19 so as to be rotatable around the rotation shaft 19 a. This up-and-down air direction board 6 is extended along the longitudinal direction (left-right direction) of the blower outlet 14, changes the air direction of the air which blows off from the blower outlet 14 about the up-and-down direction, and opens and closes the blower outlet 14. In the following description, the lower side of the two surfaces of the vertical wind direction plate 6 is referred to as the front surface 6a, and the upper side is referred to as the back surface 6b.

  The up-and-down airflow direction plate 6 can rotate in a range from the upper structure contact (fully closed state) to the lower structure contact (fully open state) around the rotation shaft 19a by driving a drive motor (not shown). It has become. The up / down wind direction plate 6 can be controlled by an operation of a remote controller (not shown), and can perform a “swing operation” in which the up / down wind direction plate 6 is reciprocally movable within a predetermined range (range from the upper limit position to the lower limit position). . Moreover, the up-and-down wind direction board 6 can be fixed to a desired position in the range from the upper limit position to the lower limit position by operating the remote controller.

<Auxiliary vertical wind direction plate 7>
As shown in FIG. 2, the auxiliary up-and-down air direction plate 7 is disposed in the vicinity of the second upper wall portion 17 above the up-and-down air direction plate 6 and is supported by the support member 20 so as to be rotatable around the rotation shaft 20 a. Yes. The auxiliary up-and-down air direction plate 7 extends along the longitudinal direction (left-right direction) of the air outlet 14 and changes the air direction of the air blown out from the air outlet 14 in the vertical direction together with the up-and-down air direction plate 6. In the following description, the lower side of the two surfaces of the auxiliary vertical wind direction plate 7 is referred to as the front surface 7a, and the upper side is referred to as the back surface 7b.

  As shown in FIG. 3A, the auxiliary up-and-down wind direction plate 7 is a rectangular plate-shaped member, and three support members 20 are arranged on the back surface 7b. The support member 20 has an attachment hole 21 and is rotatably attached to a support shaft (not shown) disposed in the second upper wall portion 17. Therefore, the auxiliary up-and-down wind direction plate 7 can rotate around the rotation shaft 20a that is the central axis of the support shaft. In the present embodiment, the auxiliary up / down wind direction plate 7 refers to a rectangular plate-like member, and the support member 20 and a support shaft (not shown) are not included in the auxiliary up / down wind direction plate 7.

  The auxiliary up-and-down airflow direction plate 7 can rotate in a range from the upper structure contact (fully closed state) to the lower structure contact (fully open state) around the rotation shaft 20a by driving a drive motor (not shown). It has become. In the state where the auxiliary up-and-down wind direction plate 7 is disposed per upper structure, the auxiliary up-and-down air direction plate 7 is disposed above the surface S extending the first upper wall portion 16 as shown in FIG. On the other hand, in a state where the auxiliary up / down wind direction plate 7 is disposed per lower structure, the auxiliary up / down wind direction plate 7 is disposed below the surface S. Therefore, the auxiliary up / down wind direction plate 7 is rotatable in the up / down direction range including the surface S. In the state where the auxiliary vertical wind direction plate 7 is disposed per upper structure, the tip 7c of the back surface 7b of the auxiliary vertical wind direction plate 7 is in contact with the second upper wall portion 17.

  As shown in FIGS. 4 and 5, the rotation range of the auxiliary vertical wind direction plate 7 is set to the upper limit position per upper structure, and the range α in which the auxiliary vertical wind direction plate 7 is disposed above the surface S, and the auxiliary vertical direction plate It is divided into a range β in which a part of the wind direction plate 7 is on the surface S and a range γ in which the lower structure is located at the lower limit position and the auxiliary vertical wind direction plate 7 is disposed below the surface S. When the auxiliary up / down wind direction plate 7 rotates downward from the upper structure, the rear end portion 7d of the auxiliary up / down wind direction plate 7 and the surface S first intersect at the upper limit T1 of the range β. In addition, at the lower limit T2 of the range β, the tip 7c of the auxiliary up-and-down airflow direction plate 7 and the surface S intersect lastly. Therefore, in the present embodiment, “the auxiliary up-and-down wind direction plate 7 is on the surface S extending the first upper wall portion 16” means that the auxiliary up-and-down wind direction plate 7 extends from the upper limit T1 to the lower limit T2, that is, in the range β. It points to something. In the present embodiment, the upper limit T1 is located approximately 15 ° below the upper structure (ie, the second upper wall portion 17), and the lower limit T2 is approximately 37 ° below the upper structure. To position.

  Further, “the auxiliary vertical wind direction plate 7 is above the surface S extending the first upper wall portion 16” means that the entire area of the auxiliary vertical wind direction plate 7 is above the surface S, specifically Specifically, it means that the entire area of the auxiliary up-and-down wind direction plate 7 is in the range α.

  Further, “the auxiliary vertical wind direction plate 7 is below the surface S extending the first upper wall portion 16” means that the entire area of the auxiliary vertical wind direction plate 7 is below the surface S. Specifically, it means that the entire area of the auxiliary up-and-down wind direction plate 7 is in the range γ.

  Further, the auxiliary up-and-down wind direction plate 7 is not controllable by an operation of the remote controller, and the position of the auxiliary up-and-down wind direction plate 7 is automatically determined depending on the operating condition of the air conditioner.

  In this air conditioner, during the cooling operation, the auxiliary up-and-down wind direction plate 7 is normally disposed on the second upper wall portion 17 side from the surface S obtained by extending the first upper wall portion 16. Therefore, as shown in FIG. 2, the auxiliary up-and-down wind direction plate 7 is disposed above the surface S (range α), and the rotation shaft 20 a is located behind the auxiliary up-and-down air direction plate 7. Further, as shown in FIG. 3B, as the rear end portion 7 d of the auxiliary vertical wind direction plate 7 approaches the rear end of the auxiliary vertical wind direction plate 7 in a cross section perpendicular to the rotation axis 20 a of the auxiliary vertical wind direction plate 7. It inclines in the direction away from the rotating shaft 20a (in FIG.3 (b), the rear-end part 7d of the auxiliary up-down wind direction board 7 inclines below as it approaches back).

  However, as shown in FIG. 6, when the vertical airflow direction plate 6 is fixed downward from a predetermined position during the cooling operation, the auxiliary vertical airflow direction plate 7 moves from the upper side (range α) to the lower side of the surface S. It rotates and is arranged below the surface S (range γ). As a result, as shown in FIG. 6, a part of the cool air from the blower fan 3 hits the auxiliary vertical wind direction plate 7, and the cold air flowing near the auxiliary vertical wind direction plate 7 flows toward the back surface 6 b of the vertical wind direction plate 6. Therefore, it is possible to prevent water droplets from being attached to the back surface 6b of the vertical wind direction plate 6. In addition, when the vertical wind direction plate 6 is fixed upward from the predetermined position after the vertical wind direction plate 6 is fixed downward from the predetermined position, the auxiliary vertical wind direction plate 7 is below the surface S (range γ ) From above, and is disposed above the surface S (range α). The “predetermined position” is appropriately determined in consideration of the amount of water droplets attached to the back surface 6b of the up / down airflow direction plate 6 and the reduction in the airflow due to the auxiliary up / down airflow direction plate 7 being disposed below the surface S. It is done.

[Remote controller]
A remote controller (not shown) is capable of infrared communication with the indoor unit 1 shown in FIG. 1 and an outdoor unit (not shown), and transmits various commands related to the control of the indoor unit 1 and the outdoor unit according to user operations. With this remote controller, the user can select a fixed position of the up-and-down wind direction plate 6, “swing operation”, each operation mode such as cooling operation, heating operation, dehumidifying operation, set temperature, and the like.

  Here, “swing operation” means that the vertical wind direction plate 6 is swung in the vertical direction within a predetermined range (range from the upper limit position to the lower limit position) and the auxiliary vertical wind direction plate 7 is An operation in which the direction in which the warm air from the air outlet 14 is blown out is changed to the up and down direction by swinging in the up and down direction within a range (up and down direction range including the surface S). Therefore, the auxiliary up-and-down wind direction plate 7 reciprocates between the upper side (range α) and the lower side (range γ) of the surface S during the “swing operation” during the heating operation.

[Control unit 8]
The control unit 8 (control means) includes a plurality of hardware such as a CPU (Central Processing Unit), a ROM (Read Only Memory), and a RAM (Random Access Memory). The ROM stores a control program for controlling the operation of the control unit 8. And this control part 8 is electrically connected with the ventilation fan 3, the left-right wind direction board 5, the up-and-down wind direction board 6, and the auxiliary | assistant up-and-down wind direction board 7, as shown in FIG.

  This control unit 8 receives the operation of the remote controller and the like, and when the fixed position of the up / down air direction plate 6, “swing operation”, each operation mode such as cooling operation, heating operation, dehumidifying operation, etc. are set, the up / down air direction The plate 6 and the auxiliary up / down wind direction plate 7 are respectively arranged at predetermined positions, or the up / down wind direction plate 6 and the auxiliary up / down wind direction plate 7 are swung in the up / down direction.

  By the way, when this control part 8 rotates the auxiliary up-and-down wind direction board 7 during the drive of the ventilation fan 3, as shown in FIG. 5, when the auxiliary up-and-down air direction board 7 exists on the surface S (range (beta)). The rotation speed V2 and the rotation speed V3 when the auxiliary vertical wind direction plate 7 is below the surface S (range γ), and the rotation when the auxiliary vertical wind direction plate 7 is above the surface S (range α). It is slower than the speed V1 (normal rotation speed). Therefore, when the auxiliary up-and-down air direction plate 7 is arranged at a position (range β and range γ) where the amount of air blown from the blower fan 3 is large, the rotation speed of the auxiliary up-and-down air direction plate 7 is slow. The rotation speed V2 and the rotation speed V3 are the same.

  On the other hand, when the blower fan 3 is not driven, the control unit 8 rotates the auxiliary up-and-down wind direction plate 7 at the normal rotation speed V1 regardless of the position of the auxiliary up-and-down air direction plate 7. Move.

[flow]
Next, the operation (flow) of the air conditioner according to the present embodiment will be described with reference to FIG.

  First, it is determined whether or not the auxiliary up-and-down wind direction plate 7 is rotating (S1). When the auxiliary up-and-down wind direction plate 7 is not rotating (S1: No), Step S1 is repeated. On the other hand, when the auxiliary up-and-down wind direction plate 7 is rotating (S1: Yes), it is determined whether or not the blower fan 3 is being driven (S2). When the blower fan 3 is not driven (S2: No), the control unit 8 rotates the auxiliary vertical wind direction plate 7 at the rotation speed V1 that is a normal rotation speed (S3). On the other hand, when the blower fan 3 is being driven (S2: Yes), it is determined whether or not the auxiliary vertical wind direction plate 7 is on the surface S (range β) or below the surface S (range γ) (S4). ). When the auxiliary up-and-down air direction plate 7 is on the surface S (range β) or below the surface S (range γ) (S4: Yes), the control unit 8 moves the auxiliary up-and-down air direction plate 7 to the normal rotation speed. It is rotated at a rotation speed V2 (V3) that is a slower rotation speed (S5). On the other hand, when the auxiliary vertical wind direction plate 7 is not on the surface S (range β) or below the surface S (range γ) (S3: No), that is, the auxiliary vertical wind direction plate 7 is above the surface S (range α). ), The control unit 8 rotates the auxiliary up-and-down wind direction plate 7 at a rotation speed V1 which is a normal rotation speed.

[Features of the air conditioner of this embodiment]
The air conditioner of this embodiment has the following characteristics.

  In this air conditioner, the auxiliary up-and-down wind direction plate 7 is rotatable in a vertical range including the surface S obtained by extending the first upper wall portion 16, and the auxiliary up-and-down wind direction plate 7 is on the surface S. Since the rotation speed V2 is slower than the rotation speed V1 when the auxiliary up-and-down wind direction plate 7 is above the surface S, the generation of wind noise is suppressed when the auxiliary up-and-down wind direction plate 7 is on the surface S. it can. Further, when the auxiliary up / down wind direction plate 7 is on the surface S, the resistance of the air volume is large, but the rotation speed of the auxiliary up / down wind direction plate 7 is slow. Can be used.

  Moreover, in this air conditioner, when the auxiliary up-and-down wind direction plate 7 is below the surface S extending the first upper wall portion 16, the rotation speed V3 is when the auxiliary up-and-down air direction plate 7 is above the surface S. Therefore, when the auxiliary up-and-down wind direction plate 7 is below the surface S, the generation of wind noise can be suppressed. Further, when the auxiliary up / down wind direction plate 7 is below the surface S, the resistance of the air volume is large, but the rotation speed of the auxiliary up / down wind direction plate 7 is slow, so that the driving torque is small as a motor for driving the auxiliary up / down wind direction plate 7. A motor can be used.

  Further, in this air conditioner, the auxiliary up-and-down wind direction plate 7 is turned off during the “swing operation” operation in which the swing operation is performed in the vertical range including the surface S extending the first upper wall portion 16 during the heating operation. Generation of sound can be suppressed.

  Further, in this air conditioner, the auxiliary up-and-down wind direction plate 7 is disposed above the surface S extending the first upper wall portion 16 during the cooling operation, and the up-and-down air direction plate 6 is fixed downward from a predetermined position. When it is done, when it is arranged below the surface S, generation of wind noise can be suppressed.

  Further, in this air conditioner, when the blower fan 3 is not driven, the rotation speed of the auxiliary vertical wind direction plate 7 is constant at the rotation speed V1, which is the normal rotation speed. When no sound is generated, the auxiliary up-and-down wind direction plate 7 can be prevented from rotating at a rotation speed slower than the normal rotation speed.

  As mentioned above, although embodiment of this invention was described, it should be thought that the specific structure of this invention is not limited to the said embodiment. The scope of the present invention is shown not only by the description of the above-described embodiment but also by the scope of claims for patent, and further includes meanings equivalent to the scope of claims for patent and all modifications within the scope.

[Modification]
In the air conditioner of the present embodiment, the rotation speed V3 when the auxiliary up-and-down wind direction plate 7 is below the surface S is slower than the rotation speed V1 when it is above the surface S, but the rotation speed V3. May be the same as the rotation speed V1.

  In the air conditioner of the present embodiment, the rotation speed V2 when the auxiliary up-and-down wind direction plate 7 is on the surface S and the rotation speed V3 when it is below the surface S are the same. The moving speed V2 and the rotation speed V3 may be different.

  Further, in the air conditioner of the present embodiment, the rotation speed when the auxiliary up-and-down wind direction plate 7 is on the surface S is constant at the rotation speed V2, but the auxiliary up-and-down air direction plate 7 is on the surface S. The rotational speed at that time may not be constant. For example, the rotational speed V2 may be gradually decreased from the upper limit T1 of the range β toward the lower limit T2.

  In the air conditioner of the present embodiment, the rotation speed when the auxiliary vertical wind direction plate 7 is below the surface S is constant at the rotation speed V3, but the auxiliary vertical wind direction plate 7 is below the surface S. The rotational speed at the time may not be constant.

  Moreover, in the air conditioner of this embodiment, as shown in FIG. 6, when the auxiliary up-and-down wind direction plate 7 rotates in the up-and-down direction range including the surface S, the up-and-down air direction plate 6 is in a predetermined position during the cooling operation. The case where the auxiliary up-and-down wind direction plate 7 is disposed below the surface S and the case of the “swing operation” during the heating operation when fixed downward is described. However, when the auxiliary up-and-down wind direction board 7 rotates in the up-and-down direction range including the surface S, it is not restricted to these. And in all the cases where the auxiliary up-down wind direction board 7 rotates in the up-down direction range containing the surface S, the effect similar to this embodiment can be acquired.

  Further, in the air conditioner of the present embodiment, when the blower fan 3 is not driven, the rotation speed of the auxiliary up-and-down wind direction plate 7 is constant, but it is not always necessary to be constant.

  Moreover, in the air conditioner of this embodiment, although the auxiliary up-and-down wind direction board 7 was made uncontrollable by remote control operation, it may be controllable by remote control operation.

  Moreover, in the air conditioner of this embodiment, although the left-right wind direction board 5 is provided, the left-right wind direction board 5 does not need to be.

  Further, during the dehumidifying operation of the air conditioner, the same operation as that during the cooling operation may be performed. Therefore, “at the time of cooling operation” in the present invention includes “at the time of dehumidifying operation”.

  By using the present invention, an air conditioner that can suppress the generation of wind noise and can use a motor with low driving torque when the auxiliary up-and-down wind direction plate is on the surface extending the first upper wall portion. Can be provided.

DESCRIPTION OF SYMBOLS 1 Indoor unit 3 Blower fan 6 Vertical wind direction board 7 Auxiliary vertical wind direction board 13 Inlet 14 Outlet 15 Upper wall part 16 1st upper wall part 17 2nd upper wall part

Claims (4)

A blower fan arranged in an air flow path from the suction port to the blowout port;
An up-and-down wind direction plate supported rotatably in the vicinity of the air outlet;
An auxiliary up-down wind direction plate supported rotatably above the up-down wind direction plate,
The upper wall portion of the air flow path is inclined to the front and the first upper wall portion is inclined downward, and the second upper wall portion is disposed so that the air flow path is widened in front of the first upper wall portion. And
The auxiliary up-down wind direction plate is rotatable in a vertical range including a surface extending from the first upper wall,
An air conditioner characterized in that a rotation speed when the auxiliary up-and-down air direction plate is on the surface is slower than a rotation speed when the auxiliary up-and-down air direction plate is above the surface.   2. The air according to claim 1, wherein a rotation speed when the auxiliary vertical wind direction plate is below the surface is slower than a rotation speed when the auxiliary vertical wind direction plate is above the surface. Harmony machine.   The air conditioner according to claim 1 or 2, wherein the auxiliary up-and-down wind direction plate performs a swing operation in a vertical range including the surface during heating operation. The auxiliary vertical wind direction plate is disposed above the surface during cooling operation, and is disposed below the surface when the vertical wind direction plate is fixed downward from a predetermined position. Item 3. An air conditioner according to item 1 or 2.

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