JP3137042B2 - Airflow control method and airflow control device for indoor unit of air conditioner - Google Patents

Abstract

There is provided an airflow control method and airflow controller for an air conditioner indoor unit capable of executing air conditioning so that indoor temperature distribution becomes uniform without any sense of airflow during heating operation. There are provided a turbofan 3 that has an axis extending in an anteroposterior direction and blows air taken in from a front surface side radially outwardly with respect to an axis inside a casing and a heat exchanger 5 disposed on the front surface side of the turbofan 3 inside the casing. The casing is provided with outlet ports for blowing air from the turbofan 3 in the vertical direction and the horizontal direction. During the heating operation, a control signal is outputted by a flap control section 10a to an upper flap stepping motor 41 and a left-hand flap stepping motor 44 so as to narrow the openings of the upper, right-hand and left-hand flaps and make the opening of the lower flap wider than the openings of the upper, right-hand and left-hand flaps. <IMAGE>

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air flow control method and an air flow control device for an indoor unit of an air conditioner for performing air conditioning in a room.

[0002]

2. Description of the Related Art Conventionally, as an indoor unit of an air conditioner, a cross fin heat exchanger and a cross flow fan are arranged in a substantially rectangular casing mounted on a wall surface, and are provided on the lower side of the casing. There are air outlets that blow out conditioned air from the outlet.

[0003]

However, in the indoor unit of the air conditioner, as shown in FIG. 8 (A), the direction of the blowout of the conditioned air from the indoor unit 80 mounted on the wall surface is substantially in one direction. Because it is limited, during the heating operation, particularly when the heating operation is started, a person easily feels a draft feeling in the living space S1, and a uniform temperature distribution is obtained unless the flap for controlling the wind direction of the blowout swings. I can't get it and I have a problem with comfort.

Therefore, an object of the present invention is to provide a heating operation
An object of the present invention is to provide an airflow control method and an airflow control device for an indoor unit of an air conditioner that can air-condition so that the indoor temperature distribution is uniform without a flap swing function and without a sense of draft.

[0005]

In order to achieve the above object, an air flow control method for an indoor unit of an air conditioner according to claim 1 is provided.
A casing, a turbo fan in which a shaft is disposed in the casing in the front-rear direction, and blows air sucked in from the front side in a radially outward direction with respect to the shaft, and a heat disposed in the casing on the front side of the turbo fan. An exchanger is provided, and an outlet is provided in the casing to blow air blown from the turbo fan in a vertical direction and a horizontal direction,
An airflow control method for an indoor unit of an air conditioner having a flap for controlling a wind direction of air blown from each of the outlets, wherein during heating operation, the opening degrees of the upper, right, and left flaps are reduced, and The opening of the flap below the opening of the right and left flaps is opened.

According to the airflow control method for the indoor unit of the air conditioner of the first aspect, the blown air flows and circulates along the wall surface, the ceiling surface and the floor surface so as to enclose the living space in the room by the four-way blowing. I do. During the heating operation, the upper flap, the right flap, and the left flap are throttled, and the upper flap, the right flap, and the left flap are opened by opening the flaps lower than the flaps. , The amount of air blown from the outlet decreases, and as a result, the amount of air blown from the lower outlet increases. By doing so, it becomes easier for warm air to reach the feet while circulating indoor air. Therefore, during the heating operation, air-conditioning can be performed such that the indoor temperature distribution is uniform without a sense of draft. In addition, when starting the heating operation in which the temperature of the living space is low, the total amount of air blown from the upper, lower, left, and right outlets does not change much, so that the heating capacity can be reduced and the room can be quickly heated.

According to a second aspect of the present invention, there is provided an airflow control device for an indoor unit of an air conditioner, wherein a shaft is disposed in the casing in a front-rear direction, and air sucked from a front side is radially outward with respect to the shaft. A turbo fan, and a heat exchanger disposed in the casing on the front side of the turbo fan.The casing has an outlet for blowing air from the turbo fan in the vertical and horizontal directions. An airflow control device for an indoor unit of an air conditioner including a flap for controlling a wind direction of air blown from each of the air outlets, and a driving unit for driving each of the flaps, and a heating operation, upper side, right side and A control signal is output to the drive unit so as to reduce the opening of the left flap and open the flaps below the upper, right and left flaps. It is characterized in that a wrap controller.

According to the airflow control device for an indoor unit of an air conditioner according to the second aspect, the blown air flows along the wall surface, the ceiling surface, and the floor surface so as to wrap the living space in the room along the wall surface, the ceiling surface, and the floor surface. I do. During the heating operation, the flap control unit outputs a control signal to the drive unit to reduce the openings of the upper flap, the right flap, and the left flap, and to lower the flaps below the flaps. By opening the opening degree, the amount of air blown from the upper, right and left outlets decreases, and as a result, the amount of air from the lower outlet increases. By doing so, it becomes easier for warm air to reach the feet while circulating indoor air. Therefore, during the heating operation, air-conditioning can be performed such that the indoor temperature distribution is uniform without a sense of draft.
In addition, especially when the heating operation in which the temperature of the living space is low is started, the total amount of air blown from the upper, lower, left, and right outlets hardly changes, so that the heating capacity is not reduced and the room can be quickly heated.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an airflow control method and an airflow control device for an indoor unit of an air conditioner according to the present invention will be described in detail with reference to the illustrated embodiments.

FIG. 1 is an exploded perspective view of a main part of an indoor unit using an airflow control method for an indoor unit of an air conditioner according to an embodiment of the present invention. A square bottom frame 2, a motor fixed via a motor fixing plate 12 to a mounting portion 11 provided substantially at the center of the bottom frame 1, and a shaft 3 disposed on the bottom frame 1 in the front-rear direction, The shaft is driven by the motor 2,
A turbo fan that blows air sucked in from the front side in a radially outward direction with respect to an axis, 4 is a bell mouth mounted on the bottom frame 1 on the front side of the turbo fan 3, and 5 is mounted on a front side of the bell mouth 4. Heat exchanger, 6
Is attached to the bottom frame 1 on the front side of the heat exchanger 5 and has a front panel having a substantially square suction port 6a. Reference numeral 7 is attached to the suction port 6a of the front panel 6, and an air filter 8 is attached to the rear side. It is a suction grill attached.
A circular hole 14 is provided substantially at the center of the bell mouth 4, and
A drain pan 13 is arranged below the bellmouth 4. The bottom frame 1 and the front panel 6 constitute a casing.

FIG. 2 is a front view of the indoor unit of the air conditioner when the suction grille 7 and the front panel 6 are removed. As shown in FIG. 2, the outlet 21 is located above the bottom frame 1, the outlet 22 is located below the bottom frame 1, and the outlet 2 is located on the right side.
3. An outlet 24 is provided on the left side. An upper flap 31, a lower flap 32, a right flap 33, and a left flap 34 are attached to the outlets 21 to 24, respectively. The above upper flap 31, lower flap 32, right flap 3
3 and the left flap 34 are driven by an upper flap stepping motor 41, a lower flap stepping motor 42, a right flap stepping motor 43, and a left flap stepping motor 44, respectively.
To control the direction of the airflow from the air blowers.

FIG. 3 is a sectional view taken along the line III-III of FIG. 2. In FIG. 3, the turbo fan 3 and the heat exchanger 5 are thinned, and the motor 2 mounted on the bottom frame 1 is mounted. The turbo fan 3 is housed in a concave portion forming a curved surface 3a. The air sucked from the front by the turbo fan 3 is passed through the suction grille 7, the air filter 8 and the heat exchanger 5, and as shown by arrows R1 and R2, the air outlets 21 and 22 (two in FIG. 3). Only shows out). In the upper outlet 21, when the upper flap 31 is at a predetermined opening degree, air from the turbo fan 3 is blown obliquely upward and forward, and its wind direction is substantially equal to a plane perpendicular to the axis of the turbo fan 3. The angle is set to 60 degrees. On the other hand, at the lower outlet 22, when the lower flap 32 is at a predetermined opening, the air from the turbofan 3 is blown obliquely downward and forward, and the wind direction is on a plane perpendicular to the axis of the turbofan 3. The angle is set to about 30 degrees. The right outlet 23 and the left outlet 24 (shown in FIG. 2) have the same structure as the lower outlet 22, and have a right flap 33 and a left flap 34.
When the opening degree is a predetermined degree (shown in FIG. 2), the air from the turbo fan 3 is blown obliquely forward and laterally, and its wind direction is at an angle of about 30 degrees with respect to a vertical plane including the axis of the turbo fan 3. I am trying to be.

FIG. 4 is a schematic diagram of the indoor unit. The indoor unit includes an upper flap stepping motor 41, a lower flap stepping motor 42, a right flap stepping motor 43 and a driving unit. It includes a left flap stepping motor 44 and a control device 10 for controlling the stepping motors 41 to 44, the turbo fan 3, and the like. The control device 10 includes a microcomputer, an input / output circuit, and the like, and outputs control signals to the stepping motors 41 to 44 according to the operation state, and outputs an upper flap 31, a lower flap 32, and a right flap 33.
And a flap control unit 10a for controlling the opening of the left flap 34. Stepping motors 41 to 4
4 and the flap control unit 10a of the control device 10 constitute an airflow control device.

5 and 6 are a cross-sectional view of a main part of an upper air outlet of the indoor unit of the air conditioner and a cross-sectional view of a main part of a lower, right and left air outlet. 5 and 6 are for explaining in detail the air outlet structure of the indoor unit of the air conditioner, and are different from the air outlet structure of the indoor unit shown in FIG.

As shown in FIG. 5, a guide portion 51 having a curved surface 51a that is gradually curved obliquely forward from the turbo fan 3 side is arranged on the rear surface side of the upper air outlet 53 of the casing 50. On the front side of the air outlet 53, a guide portion 52 having a curved surface 52a gradually curved obliquely forward from the turbo fan 3 side is disposed. The guide sections 51 and 52 form an outlet passage for blowing conditioned air obliquely upward and forward. Further, the upper flap 5 rotatably supported by the rotary shaft 55 at the outlet 53.
4 is installed. The upper flap 54 has a front edge gradually curved toward the turbo fan 3 so that the air flows smoothly along the blow passage when the upper flap 54 is opened at a predetermined opening. Also, the upper flap 54
A plurality of vertical plates 56 (only one is shown in FIG. 5) extending substantially vertically at predetermined intervals are provided on the front side of the wing surface. When the upper flap 54 is set at a predetermined opening, the direction of the air blown out of the turbo fan 3 by the guide portions 51 and 52 and the upper flap 54 is obliquely upward and forward with respect to a plane perpendicular to the axis of the turbo fan 3. The angle to make is about 60
The airflow is controlled so that it becomes a degree. Upper flap 54
In order to reduce the opening degree, the upper flap 54 is rotated in the direction of arrow R3.

As shown in FIG. 6, on the lower side of the casing 50, on the rear side of the outlet 63 on the right and left sides,
A guide portion 61 having a curved surface 61a that is gradually curved diagonally forward from the turbofan 3 side is disposed, and a curved surface that is gradually curved diagonally forward from the turbofan 3 side on the front side of the outlet 63. Guide part 62 having 62a
Has been arranged. In the lower outlet 63, the guides 61 and 62 form an outlet passage for blowing conditioned air obliquely downward and forward from the outlet 63. In the left and right outlets 63, the guide portions 61 and 62 form an outlet passage for blowing conditioned air forward and diagonally from the outlet 53. Further, the lower, right and left flaps 64 rotatably supported by the rotary shaft 65 are attached to the outlet 63. On the front side of the wing surface of the upper flap 64, a plurality of vertical plates 66 (only one is shown in FIG. 6) extending substantially vertically at predetermined intervals are provided. The lower outlet 6 above
In 3, when the lower flap 64 is set at a predetermined angle, the direction of the air blown out of the turbo fan 3 is obliquely downward and forwardly reduced by the guide portions 61, 62 and the flap 64 to a plane perpendicular to the axis of the turbo fan 3. The airflow is controlled so that the angle formed by the angle is approximately 30 degrees. In the right and left outlets 63, a right flap 64, a left flap 6
When the angle 4 is set to a predetermined angle, the guide portion 61, 62 and the flap 64 make the direction of the air blown from the turbofan 3 diagonally forward and obliquely to the plane perpendicular to the axis of the turbofan 3. Is controlled to be approximately 30 degrees. To narrow the opening of the flap 64, the flap 64 is rotated in the direction of arrow R4.

As shown in FIG. 3, in the indoor unit of the air conditioner configured as described above, when the motor 2 is driven, the turbo fan 3 rotates, and the air flows through the heat exchanger 5 from the axial front of the turbo fan 3. And air flows along the curved surface of the curved portion 3a of the turbo fan 3, and the conditioned air heat exchanged by the heat exchanger 5 is directed radially outwardly to the upper, lower, left and right outlets 21 to 24.
Blow out from. At this time, the stepping motors 41 to 41 are controlled by the flap control unit 10a of the control device 10 shown in FIG.
By controlling the upper flap 3 shown in FIG.
1, lower flap 32 right flap 33 and left flap 3
By controlling the opening degree of No. 4, the wind direction of the air blown out from the air outlets 21 to 24 is respectively controlled. For example, as shown in FIG. 7, when the indoor unit 70 is mounted on a wall surface in a room and blows out in four directions, up, down, left and right, as shown in FIG. It flows and circulates around the indoor living space S2 along the surface and floor,
In this case, the user does not feel the draft feeling, and the comfort during the cooling / heating operation is improved.

When the heating operation is started, the flap controller 10a of the control device 10 controls the upper flap stepping motor 41, the lower flap stepping motor 42, the right flap stepping motor 43, and the left flap stepping motor 44. By outputting a control signal, the opening of the upper flap 31, the right flap 33 and the left flap 34 is reduced, and the opening of the lower flap 32 is opened more than the opening of the upper flap 31, the right flap 33 and the left flap 34. , Upper, right and left outlets 2
The air volume from 1,23,24 decreases, and conversely, the lower outlet 2
The amount of air from 2 increases, and warm air easily reaches below the feet.

Therefore, during the heating operation, the air conditioning can be performed so that the indoor temperature distribution becomes uniform without a sense of draft. In addition, when starting the heating operation in which the temperature of the living space is particularly low, the total amount of air blown from one turbo fan 3 through the four outlets 21 to 24 hardly changes, so that the heating capacity may decrease. Without heating the room.

In the above embodiment, the openings of the upper flap 31, the right flap 33 and the left flap 34 are narrowed, and the openings of the lower flap 32 are opened more than the openings of the upper flap 31, the right flap 33 and the left flap 34. The airflow control is performed at the time of starting the heating operation, but may be performed during the normal heating operation.

[0021]

As is apparent from the above description, in the air flow control method for an indoor unit of an air conditioner according to the first aspect of the present invention, the casing and the shaft are arranged in the casing in the front-rear direction, and the air is sucked from the front side. A turbo fan that blows air outward in the radial direction with respect to the axis, and a heat exchanger disposed in the front side of the turbo fan in the casing, and blows out air from the turbo fan in the casing in the vertical and horizontal directions. An airflow control method for an indoor unit of an air conditioner, comprising: a flap for controlling a wind direction of air blown from each of the above-described air outlets. The opening of the flaps below the upper, right and left flaps is opened.

Therefore, according to the airflow control method for an indoor unit of an air conditioner of the present invention, the opening degrees of the upper flap, the right flap and the left flap are reduced during the heating operation, and the opening of these flaps is reduced. By opening the opening of the flap below the air outlet, the air flow from the upper, right and left outlets is reduced and the air flow from the lower outlet is increased. While circulating the air effectively, warm air can easily reach below the feet. Therefore, during the heating operation, air conditioning can be performed without a flap swing function and without a sense of draft so that the temperature distribution in the room becomes uniform. In addition, especially when starting the heating operation in which the temperature of the living space is low, the total amount of air blown from the upper, lower, left, and right outlets does not change much, so that the heating capacity is prevented from lowering and the room is quickly heated. be able to.

According to a second aspect of the present invention, there is provided an air conditioner for an indoor unit of an air conditioner, wherein a shaft is disposed in the casing in the front-rear direction, and the air sucked from the front side has a radius relative to the shaft. A turbo fan that blows outward in the direction
A heat exchanger disposed on the front side of the turbo fan in the casing, and an outlet for blowing air blown out of the turbo fan in the up-down direction and the left-right direction is provided in the casing, and blow-out from each of the blow-out ports is provided. An airflow control device for an indoor unit of an air conditioner including flaps that respectively control the wind directions, and a driving unit that drives each of the flaps,
During the heating operation, the flap control unit outputs a control signal to the drive unit to reduce the opening degrees of the upper, right, and left flaps, and to lower the flaps below the opening degrees of the upper, right, and left flaps. The degree of opening is increased.

Therefore, according to the airflow control device for an indoor unit of an air conditioner of the present invention, during the heating operation, the flap control section controls the drive section to control the upper flap, the right flap and the right flap. By reducing the opening of the left flap and opening the flaps below the opening of the flaps, the amount of air blown out from the upper, right and left outlets is reduced, and the lower outlet is reduced. Since the air volume from the air is increased, the indoor air is effectively circulated by the four-way blowing, and the warm air easily reaches the feet. Therefore, during the heating operation, air conditioning can be performed without a flap swing function and without a sense of draft so that the temperature distribution in the room becomes uniform. In addition, especially when starting the heating operation in which the temperature of the living space is low, the total amount of air blown out from the upper, lower, left, and right outlets does not change much.
The heating capacity can be prevented from lowering, and the room can be quickly heated.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a main part of an indoor unit using an airflow control method for an indoor unit of an air conditioner according to an embodiment of the present invention.

FIG. 2 is a front view of the indoor unit.

FIG. 3 is a sectional view taken along line III-III in FIG. 2;

FIG. 4 is a schematic configuration diagram of the indoor unit.

FIG. 5 is a sectional view of a main part showing an upper outlet structure of the indoor unit.

FIG. 6 is a sectional view showing a main part of the lower, left and right outlet ports of the indoor unit.

FIG. 7 is a diagram showing a state in which the indoor unit is mounted on a wall surface in a room.

FIG. 8A is a diagram showing a state of airflow of an indoor unit of a conventional air conditioner, and FIG. 8B is a diagram showing a state of airflow of an indoor unit of an air conditioner according to an embodiment of the present invention. FIG.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Bottom frame, 2 ... Fan motor, 3 ... Turbo fan, 4 ... Bell mouth, 5 ... Heat exchanger, 6 ... Front panel,
7: suction grille, 8: air filter, 10: control device,
10a: flap control unit, 21 to 24 ... outlet, 31 ...
Upper flap, 32 ... Lower flap, 33 ... Right flap, 3
4 left flap, 41 stepper motor for upper flap, 42 stepper motor for lower flap, 43 stepper motor for right flap, 44 stepper motor for left flap.

Continuation of front page (56) References JP-A-56-59150 (JP, A) JP-A-61-228242 (JP, A) JP-A-3-59342 (JP, A) JP-A-10-141741 (JP) , A) (58) Field surveyed (Int. Cl. ⁷ , DB name) F24F 11/02 102 F24F 11/02 104

Claims (2)

(57) [Claims] A casing (1, 6) and said casing
A turbo fan (3) having a shaft arranged in the front-rear direction within (1, 6) and blowing air taken in from the front side in a radially outward direction with respect to the shaft; and a turbo fan (3) provided in the casing (1, 6). A heat exchanger (5) arranged on the front side of (3), and an outlet (21) for blowing air from the turbofan (3) to the casing (1, 6) in the vertical and horizontal directions. To 24), and flaps (31 to 3) for controlling the wind direction of the blowout from each of the outlets (21 to 24).
4) A method of controlling an airflow of an indoor unit of an air conditioner provided with 4), wherein during heating operation, upper, right and left flaps (31,
33, 34), and the flaps below the upper, right and left flaps (31, 33, 34).
(32) An airflow control method for an indoor unit of an air conditioner, wherein the degree of opening is increased. 2. A casing (1, 6), said casing
A turbo fan (3) having a shaft arranged in the front-rear direction within (1, 6) and blowing air taken in from the front side in a radially outward direction with respect to the shaft; and a turbo fan (3) provided in the casing (1, 6). A heat exchanger (5) arranged on the front side of (3), and an outlet (21) for blowing air from the turbofan (3) to the casing (1, 6) in the vertical and horizontal directions. To 24), and flaps (31 to 3) for controlling the wind direction of the blowout from each of the outlets (21 to 24).
4) An airflow control device for an indoor unit of an air conditioner, comprising: a driving unit (4) for driving each of the flaps (31 to 34);
During heating operation, the upper, right and left flaps (31, 3)
3, 34), and the lower flap than the upper, right and left flaps (31, 33, 34).
An air flow control device for an indoor unit of an air conditioner, comprising: a flap control section (10a) for outputting a control signal to the drive sections (41 to 44) so as to open the opening of (32). .