JP5408318B1 - Air conditioning indoor unit - Google Patents

Abstract

An air-conditioning indoor unit capable of realizing conditioned air that is closer to natural wind by diversifying the flow of wind.
In an air conditioning indoor unit 10, a control unit 40 controls the operation of a Coanda blade during fluctuation airflow control to generate a Coanda generation state in which the Coanda airflow is generated and a Coanda non-generation state in which the Coanda airflow is not generated. Since the mode including is executed, the flow of the wind is diversified by suddenly generating the Coanda air flow during the fluctuation air flow control, and the conditioned air closer to the natural wind can be provided to the occupant.
[Selection] Figure 8

Description

  The present invention relates to an air conditioning indoor unit, and more particularly, to an air conditioning indoor unit that uses the Coanda effect.

  In recent years, in order to improve the comfort of living space, efforts have been made to bring the conditioned air blown from the air-conditioning indoor unit closer to a natural airflow. For example, in an air conditioner described in Patent Document 1 (Japanese Patent Application Laid-Open No. 2001-41538), the wind direction of conditioned air is adjusted with three blades that swing up and down. By trying to make the phase different, an airflow close to natural wind is to be realized.

  However, in the configuration as described above, it is not possible to realize a variety of wind flows only by making the airflow gradually approach and move away from the person.

  The subject of this invention is providing the air-conditioning indoor unit which can implement | achieve the conditioned air nearer natural wind by diversification of the flow of a wind.

  An air conditioner indoor unit according to a first aspect of the present invention is an air conditioner indoor unit that generates a fluctuating air flow by changing the wind direction of conditioned air blown out from a blower outlet, and includes a Coanda blade and a control unit. ing. The Coanda blade is provided in the vicinity of the air outlet, and guides the conditioned air into a predetermined direction as a Coanda airflow along its lower surface by the Coanda effect. The control unit controls the fluctuation airflow of the conditioned air. In addition, the control unit controls the operation of the Coanda blade during fluctuation airflow control, and executes a first mode including a Coanda generation state in which the Coanda airflow is generated and a Coanda non-generation state in which the Coanda airflow is not generated.

  The Coanda blades change the flow of conditioned air instantaneously into a Coanda airflow directed in a predetermined direction by the Coanda effect. In other words, when the Coanda effect is eliminated, the Coanda airflow instantaneously switches to the original flow. When the conditioned air hits the resident, the conditioned air does not hit the resident at the same time as the Coanda airflow is generated, and the conditioned air hits the resident at the same time as the Coanda effect is eliminated. In this air conditioning indoor unit, when the fluctuation airflow control is performed, the flow of wind is diversified by suddenly generating a Coanda airflow, so that conditioned air closer to natural wind can be provided to the occupant.

  An air conditioner indoor unit according to a second aspect of the present invention is an air conditioner indoor unit that generates a fluctuating air flow by changing the wind direction of conditioned air blown out from a blower outlet, and includes a Coanda blade and a control unit. ing. The Coanda blade is provided in the vicinity of the air outlet, and guides the conditioned air into a predetermined direction as a Coanda airflow along its lower surface by the Coanda effect. The control unit controls the fluctuation airflow by changing the wind direction change pattern of the conditioned air. Further, at least the first mode and the second mode are preset in the control unit as modes that can be executed. The first mode is a mode including a Coanda generation state in which the operation of the Coanda blade is controlled to generate a Coanda airflow and a Coanda non-generation state in which the Coanda airflow is not generated during fluctuation airflow control. The second mode is a mode in which a Coanda airflow is not always generated during fluctuation airflow control. Furthermore, a control part mixes the time slot | zone which performs 1st mode, and the time slot | zone which performs 2nd mode at the time of fluctuation airflow control.

  The Coanda blades change the flow of conditioned air instantaneously into a Coanda airflow directed in a predetermined direction by the Coanda effect. In other words, when the Coanda effect is eliminated, the Coanda airflow instantaneously switches to the original flow. When the conditioned air hits the resident, the conditioned air does not hit the resident at the same time as the Coanda airflow is generated, and the conditioned air hits the resident at the same time as the Coanda effect is eliminated. In this air conditioning indoor unit, during fluctuation airflow control, the flow of wind is diversified by mixing the time zone in which the first mode is executed and the time zone in which the second mode is executed. Can be provided to residents.

  An air conditioning indoor unit according to a third aspect of the present invention is the air conditioning indoor unit according to the first aspect or the second aspect, and further includes a wind direction adjusting blade that changes a blowing angle of the conditioned air with respect to a horizontal plane. The control unit controls the fluctuation airflow using one or both of the wind direction adjusting blade and the Coanda blade.

  This air conditioner indoor unit can realize three types of fluctuation airflow, including fluctuation airflow caused only by wind direction adjustment blades, fluctuation airflow caused only by Coanda blades, and fluctuation airflow caused by wind direction adjustment blades and Coanda blades. On the other hand, it is possible to provide a fluctuating airflow that is varied.

  The air conditioning indoor unit according to the fourth aspect of the present invention is the air conditioning indoor unit according to the third aspect, wherein the fluctuation airflow control includes an A mode and a B mode. In the A mode, the airflow is generated by swinging the wind direction adjusting blade and the Coanda blade. In the B mode, only the wind direction adjusting blade is swung to generate a fluctuating air current.

  In this air conditioning indoor unit, in the A mode, the fluctuation airflow that gradually approaches and gradually moves away from the occupant is instantaneously adsorbed on the lower surface of the Coanda blade by the swing of the Coanda blade and becomes a Coanda airflow and is not suitable for the resident. The state where the Coanda effect is eliminated and the state toward the resident is repeated. In the B mode, the conditioned air is swung up and down by the wind direction adjusting blades, and becomes a fluctuating air flow that gradually approaches and gradually moves away from the occupant. That is, by mixing the A mode and the B mode, it is possible to realize a fluctuation air flow accompanied by “unexpected wind” and a fluctuation air flow accompanied by “unexpected wind”.

  An air conditioning indoor unit according to a fifth aspect of the present invention is the air conditioning indoor unit according to the fourth aspect, wherein the fluctuation airflow control further includes a C mode in which only the Coanda blade is oscillated to generate a fluctuation airflow. .

  In this air conditioning indoor unit, in the C mode, when the direction of the conditioned air is constant, the Coanda vane swings and is instantaneously adsorbed on the lower surface of the Coanda vane to become a Coanda airflow and is not suitable for the resident. Is canceled and the state toward the resident is repeated. That is, a certain “unexpected wind” can be generated.

  An air conditioning indoor unit according to a sixth aspect of the present invention is the air conditioning indoor unit according to the first aspect or the second aspect, and the control unit changes the air volume of the conditioned air during fluctuation airflow control.

  In this air conditioning indoor unit, conditioned air becomes an airflow that is closer to natural wind by changing the air volume in addition to the wind direction, so that a comfortable air-conditioned space can be provided to the occupant.

  An air conditioning indoor unit according to a seventh aspect of the present invention is the air conditioning indoor unit according to the sixth aspect, wherein the control unit changes the air volume of the conditioned air to a predetermined air volume at least during a time period in which the Coanda air current is generated.

  In this air conditioner indoor unit, “unexpected wind” has no effect unless it reaches the residents. In other words, if the air volume in the time zone in which the Coanda air current is generated is reduced, the conditioned air at the moment when the Coanda effect is canceled does not reach the resident due to the air volume reduction and does not become an “unexpected wind”.

  In this air-conditioning indoor unit, the conditioned air volume is changed to a predetermined volume at least during the time period in which the Coanda flow is generated, and the conditioned air at the moment when the Coanda effect is eliminated maintains the predetermined volume. Can be realized.

  In the air conditioner indoor unit according to the first aspect of the present invention, the flow of the wind is diversified by suddenly generating the Coanda airflow during the fluctuation airflow control, so that conditioned air closer to natural wind is provided to the occupant. be able to.

  In the air conditioning indoor unit according to the second aspect of the present invention, the flow of wind diversifies by mixing the time zone for executing the first mode and the time zone for executing the second mode at the time of fluctuation airflow control. It is possible to provide residents with conditioned air that is closer to natural wind.

  In the air conditioning indoor unit according to the third aspect of the present invention, three types of fluctuation airflow are realized, including fluctuation airflow caused only by the wind direction adjustment blade, fluctuation airflow caused only by the Coanda blade, and fluctuation airflow caused by the wind direction adjustment blade and the Coanda blade. It is possible to provide a fluctuating air flow that is varied to residents.

  In the air-conditioning indoor unit according to the fourth aspect of the present invention, by mixing the A mode and the B mode, a fluctuation air flow accompanied by “unexpected wind” and a fluctuation air flow accompanied by “unexpected wind” are realized. be able to.

  In the air conditioning indoor unit pertaining to the fifth aspect of the present invention, in the C mode, when the direction of the conditioned air is constant, the Coanda blade swings and is instantaneously adsorbed on the lower surface of the Coanda blade, resulting in a Coanda airflow. The state where it disappears and the state where the Coanda effect is canceled and the occupant is directed again are repeated. That is, a certain “unexpected wind” can be generated.

  In the air-conditioning indoor unit according to the sixth aspect of the present invention, the conditioned air becomes an airflow that is closer to natural wind by changing the air volume in addition to the wind direction, so that a comfortable air-conditioned space can be provided to the occupant.

  In the air conditioning indoor unit pertaining to the seventh aspect of the present invention, at least during the time period in which the Coanda airflow is generated, the conditioned air volume is changed to the predetermined air volume, and the conditioned air at the moment when the Coanda effect is eliminated maintains the predetermined air volume. As a result, the “unexpected wind” can be realized.

Sectional drawing of the air-conditioning indoor unit at the time of the operation stop which concerns on one Embodiment of this invention. A sectional view of an air-conditioning indoor unit at the time of operation. The side view of the wind direction adjustment blade | wing and Coanda blade | wing when conditioned air is normally blown forward. The side view of the wind direction adjustment blade | wing and Coanda blade | wing at the time of conditioned air normally blowing forward lower. The side view of the wind direction adjustment blade | wing at the time of Coanda airflow front blowing, and the Coanda blade | wing. The side view of the wind direction adjustment blade | wing at the time of Coanda airflow ceiling blowing, and a Coanda blade | wing. The conceptual diagram which shows the direction of conditioned air, and the direction of Coanda airflow. The conceptual diagram showing an example of the opening angle of a wind direction adjustment blade | wing and a Coanda blade | wing. The comparison figure of the internal angle which the tangent of the scroll end F at the time of Coanda airflow front blowing and the Coanda blade | wing make, and the internal angle which the tangent of the scroll end F and the wind direction adjustment blade | wing make. The comparison figure of the interior angle which the tangent of the terminal F of a scroll at the time of Coanda airflow ceiling blowing and the Coanda blade | wing consist, and the internal angle which the tangent of the terminal F of a scroll and a wind direction adjustment blade | wing form. The side view of the air-conditioning indoor unit installation space which shows the wind direction of the conditioned air by the vertical swing of a wind direction adjustment blade. The side view of the air-conditioning indoor unit installation space which shows the wind direction of the conditioned air at the time of a wind direction adjustment blade | wing facing down. The side view of the air-conditioning indoor unit installation space which shows the wind direction of Coanda airflow when the attitude | position of a Coanda blade | wing is a ceiling blowing attitude | position. The flowchart which shows operation | movement of the wind direction adjustment blade | wing at the time of fluctuation airflow A control, and a Coanda blade | wing. The flowchart which shows the wind direction adjustment blade | wing at the time of fluctuation airflow B control, the operation | movement of a Coanda blade | wing, and the fan rotation speed of an indoor fan. The flowchart which shows operation | movement of the wind direction adjustment blade | wing at the time of fluctuation airflow control in a 1st modification, and a Coanda blade | wing. The flowchart which shows operation | movement of the wind direction adjustment blade | wing at the time of fluctuation airflow control in a 2nd modification, and a Coanda blade | wing.

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

(1) Configuration of Air Conditioning Indoor Unit 10 FIG. 1 is a cross-sectional view of the air conditioning indoor unit 10 when operation is stopped according to an embodiment of the present invention. FIG. 2 is a cross-sectional view of the air conditioning indoor unit 10 during operation. 1 and 2, the air conditioning indoor unit 10 is a wall-hanging type, and a main body casing 11, an indoor heat exchanger 13, an indoor fan 14, a bottom frame 16, and a control unit 40 are mounted thereon.

  The main body casing 11 has a top surface portion 11a, a front panel 11b, a back plate 11c, and a lower horizontal plate 11d, and houses an indoor heat exchanger 13, an indoor fan 14, a bottom frame 16, and a control unit 40 therein. .

  The top surface part 11a is located in the upper part of the main body casing 11, and the inlet (not shown) is provided in the front part of the top surface part 11a.

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

  The indoor heat exchanger 13 and the indoor fan 14 are attached to the bottom frame 16. The indoor heat exchanger 13 exchanges heat with the passing air. In addition, the indoor heat exchanger 13 has an inverted V-shape in which both ends are bent downward in a side view, and the indoor fan 14 is located below the indoor heat exchanger 13. The indoor fan 14 is a cross-flow fan, blows air taken in from the room against the indoor heat exchanger 13 and then blows it into the room.

  An air outlet 15 is provided at the lower part of the main body casing 11. A wind direction adjusting blade 31 that changes the direction of conditioned air blown from the blower outlet 15 is rotatably attached to the blower outlet 15. The wind direction adjusting blade 31 is driven by a motor (not shown) and can change the direction of the conditioned air, and can also open and close the air outlet 15. The wind direction adjusting blade 31 can take a plurality of postures having different inclination angles.

  A Coanda blade 32 is provided in the vicinity of the air outlet 15. The Coanda blade 32 can take a posture inclined in the front-rear direction by a motor (not shown), and is accommodated in the accommodating portion 130 provided in the front panel 11b when the operation is stopped. The Coanda blade 32 can take a plurality of postures having different inclination angles.

  Further, the air outlet 15 is connected to the inside of the main body casing 11 by the air outlet channel 18. The blowout channel 18 is formed along the scroll 17 of the bottom frame 16 from the blowout port 15.

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

  The control unit 40 is located on the right side of the indoor heat exchanger 13 and the indoor fan 14 when the main body casing 11 is viewed from the front panel 11b, and controls the rotational speed of the indoor fan 14, the wind direction adjusting blade 31 and the Coanda blade 32. Perform motion control.

(2) Detailed configuration (2-1) Front panel 11b
As shown in FIG. 1, the front panel 11 b extends toward the front edge of the lower horizontal plate 11 d while drawing a gentle arc curved surface from the upper front of the main body casing 11. There is a region recessed toward the inside of the main body casing 11 at the bottom of the front panel 11b. The depth of the depression in this region is set so as to match the thickness dimension of the Coanda blade 32, and constitutes a housing portion 130 in which the Coanda blade 32 is housed. The surface of the accommodating part 130 is also a gentle circular curved surface.

(2-2) Air outlet 15
As shown in FIG. 1, the blower outlet 15 is formed in the lower part of the main body casing 11, and is a rectangular opening which makes a horizontal direction (direction orthogonal to the paper surface of FIG. 1) a long side. The lower end of the blower outlet 15 is in contact with the front edge of the lower horizontal plate 11d, and the virtual plane connecting the lower end and the upper end of the blower outlet 15 is inclined forward and upward.

(2-3) Scroll 17
The scroll 17 is a partition wall curved so as to face the indoor fan 14 and is a part of the bottom frame 16. The end F of the scroll 17 reaches the vicinity of the periphery of the air outlet 15. The air passing through the blowout flow path 18 travels along the scroll 17 and is sent in the tangential direction of the end F of the scroll 17. Therefore, if there is no wind direction adjusting blade 31 at the air outlet 15, the air direction of the conditioned air blown out from the air outlet 15 is a direction substantially along the tangent L 0 of the terminal end F of the scroll 17.

(2-4) Vertical wind direction adjusting plate 20
As shown in FIGS. 1 and 2, the vertical wind direction adjusting plate 20 includes a plurality of blade pieces 201 and a connecting rod 203 that connects the plurality of blade pieces 201. Further, the vertical air direction adjusting plate 20 is disposed nearer the indoor fan 14 than the air direction adjusting blades 31 in the blowout flow path 18.

  The plurality of blade pieces 201 swing left and right around a state perpendicular to the longitudinal direction as the connecting rod 203 horizontally reciprocates along the longitudinal direction of the outlet 15. The connecting rod 203 is horizontally reciprocated by a motor (not shown).

(2-5) Wind direction adjusting blade 31
The wind direction adjusting blade 31 has an area that can block the air outlet 15. In the state where the airflow direction adjusting blade 31 closes the air outlet 15, the outer side surface 31 a is finished to have a gentle circular curved surface that protrudes outwardly as if it is an extension of the curved surface of the front panel 11 b. Further, the inner side surface 31b (see FIG. 2) of the wind direction adjusting blade 31 also forms an arcuate curved surface substantially parallel to the outer surface.

  The wind direction adjusting blade 31 has a rotation shaft 311 at the lower end. The rotating shaft 311 is connected to the rotating shaft of a stepping motor (not shown) fixed to the main body casing 11 in the vicinity of the lower end of the air outlet 15.

  The rotation shaft 311 rotates counterclockwise when viewed from the front in FIG. 1, so that the upper end of the airflow direction adjusting blade 31 moves away from the upper end side of the outlet 15 to open the outlet 15. On the contrary, when the rotation shaft 311 rotates in the clockwise direction in FIG. 1, the upper end of the wind direction adjusting blade 31 operates so as to approach the upper end side of the outlet 15 to close the outlet 15.

  In a state where the airflow direction adjusting blade 31 opens the air outlet 15, the conditioned air blown out from the air outlet 15 flows substantially along the inner side surface 31 b of the airflow direction adjusting blade 31. In other words, the conditioned air blown out substantially along the tangential direction of the terminal end F of the scroll 17 has its wind direction changed slightly upward by the wind direction adjusting blade 31.

(2-6) Coanda blade 32
The Coanda blade 32 is stored in the storage unit 130 while the air-conditioning operation is stopped or in an operation in the normal blowing mode described later. The Coanda blade 32 moves away from the accommodating portion 130 by rotating. The rotation shaft 321 of the Coanda blade 32 is provided in the vicinity of the lower end of the housing portion 130 and inside the main body casing 11 (a position above the upper wall of the blowout flow path 18). The rotating shaft 321 is connected with a predetermined interval. Therefore, as the rotation shaft 321 rotates and the Coanda blade 32 moves away from the housing portion 130 of the front surface of the indoor unit, the height position of the lower end of the Coanda blade 32 rotates so as to become lower. Further, the inclination when the Coanda blade 32 rotates and opens is gentler than the inclination of the front surface of the indoor unit.

  In the present embodiment, the accommodating portion 130 is provided outside the air passage, and the entire Coanda blade 32 is accommodated outside the air passage when being accommodated. Instead of this structure, only a part of the Coanda blade 32 may be accommodated outside the air passage, and the rest may be accommodated in the air passage (for example, the upper wall portion of the air passage).

  Further, when the rotating shaft 321 rotates counterclockwise in the front view of FIG. 1, the upper and lower ends of the Coanda blades 32 are separated from the housing portion 130 while drawing an arc. The shortest distance between the accommodation unit 130 on the front surface of the indoor unit is larger than the shortest distance between the lower end and the accommodation unit 130. That is, the Coanda blade 32 is controlled so as to move away from the front surface of the indoor unit as it goes forward. Then, when the rotation shaft 321 rotates in the clockwise direction in the front view of FIG. 1, the Coanda blade 32 approaches the storage unit 130 and is finally stored in the storage unit 130. The operating state of the Coanda blade 32 includes a state where the Coanda blade 32 is housed in the storage unit 130, a posture rotated and tilted forward and upward, a posture rotated and substantially horizontal, and a posture rotated and tilted forward and downward. is there.

  In a state where the Coanda blade 32 is housed in the housing portion 130, the outer surface 32a of the Coanda blade 32 is finished to a gentle circular curved surface that protrudes outwardly as if it is an extension of the gentle circular curved surface of the front panel 11b. . Further, the inner side surface 32 b of the Coanda blade 32 is finished to have an arcuate curved surface that follows the surface of the housing portion 130.

  Further, the dimension in the longitudinal direction of the Coanda blade 32 is set to be equal to or larger than the dimension in the longitudinal direction of the wind direction adjusting blade 31. This is because all the conditioned air whose direction is adjusted by the wind direction adjusting blade 31 is received by the Coanda blade 32, and its purpose is to prevent the conditioned air from the side of the Coanda blade 32 from short-circuiting.

(3) Controlling the direction of conditioned air The air conditioning indoor unit of the present embodiment, as means for controlling the direction of conditioned air, is a normal blowing mode in which only the wind direction adjusting blade 31 is rotated to adjust the direction of conditioned air, and the wind direction. The adjustment vane 31 and the Coanda vane 32 are rotated, and the Coanda effect utilization mode in which the conditioned air is made into a Coanda airflow along the outer surface 32a of the Coanda vane 32 by the Coanda effect is provided.

  Since the postures of the wind direction adjusting blade 31 and the Coanda blade 32 change for each air blowing direction in each mode, each posture will be described with reference to the drawings. It should be noted that the blowing direction can be selected by the user via a remote controller or the like. It is also possible to control the mode change and the blowing direction to be automatically changed.

(3-1) Normal blowing mode The normal blowing mode is a mode in which only the wind direction adjusting blade 31 is rotated to adjust the direction of the conditioned air, and includes “normal forward blowing” and “normal forward lower blowing”.

(3-1-1) Normal Front Blow FIG. 3A is a side view of the wind direction adjusting blade 31 and the Coanda blade 32 when the conditioned air is normally forward blown. In FIG. 3A, when the user selects “normal blow”, the control unit 40 rotates the wind direction adjusting blade 31 to a position where the inner side surface 31b of the wind direction adjusting blade 31 becomes substantially horizontal. In addition, when the inner side surface 31b of the wind direction adjustment blade | wing 31 has comprised the circular arc curved surface like this embodiment, the wind direction adjustment blade | wing 31 is rotated until the tangent in the front end E1 of the inner side surface 31b becomes substantially horizontal. As a result, the conditioned air is in a front blowing state.

(3-1-2) Normal Front Down Blow FIG. 3B is a side view of the wind direction adjusting blade 31 and the Coanda blade 32 when the conditioned air is normally forward down blown. In FIG. 3B, when the user wants to direct the blowing direction downward from “normal forward blowing”, the user may select “normal forward lower blowing”.

  At this time, the control unit 40 rotates the wind direction adjusting blade 31 until the tangent at the front end E1 of the inner side surface 31b of the wind direction adjusting blade 31 becomes lower than the horizontal. As a result, the conditioned air is in a front lower blowing state.

(3-1-3) Wind Direction Automatic FIG. 6A is a side view of the air conditioning indoor unit installation space showing the wind direction of the conditioned air by the vertical swing of the wind direction adjusting blade 31. The wind direction adjustment as shown in FIG. 6A is a wind direction adjustment by a so-called auto louver function, which is also implemented in a conventional product, and is used as a means for repeating the operation of applying or not applying the wind to the human body 400.

(3-2) Coanda effect utilization mode Coanda (effect) means that if there is a wall near the flow of gas or liquid, it flows in the direction along the wall even if the direction of flow and the direction of the wall are different It is a phenomenon to try (Asakura Shoten "Dictionary of Law"). The Coanda utilization mode includes “Coanda airflow front blowing” and “Coanda airflow ceiling blowing” using this Coanda effect.

  The direction of the conditioned air and the direction of the Coanda airflow differ depending on how the reference position is determined, but an example is shown below. FIG. 4A is a conceptual diagram showing the direction of conditioned air and the direction of Coanda airflow. In FIG. 4A, in order to produce the Coanda effect on the outer surface 32a side of the Coanda blade 32, the inclination of the conditioned air direction (D1) changed by the wind direction adjusting blade 31 is close to the posture (inclination) of the Coanda blade 32. There is a need. If they are too far apart, the Coanda effect will not occur. Therefore, in this Coanda effect utilization mode, the Coanda blade 32 and the wind direction adjusting blade 31 need to be equal to or less than a predetermined opening angle, and the above relationship is established so that both blades (31, 32) are within the range. Is established. Thereby, as shown in FIG. 4A, after the wind direction of the conditioned air is changed to D1 by the wind direction adjusting blade 31, it is further changed to D2 by the Coanda effect.

  Moreover, in the Coanda effect utilization mode of this embodiment, it is preferable that the Coanda blade | wing 32 exists in the front (downstream side of blowing) and the upper position of the wind direction adjustment blade | wing 31. FIG.

  The opening angle between the wind direction adjusting blade 31 and the Coanda blade 32 is defined differently depending on how to set the reference position, but an example is shown below. FIG. 4B is a conceptual diagram illustrating an example of an opening angle between the wind direction adjusting blade 31 and the Coanda blade 32. 4B, the angle between the straight line connecting the front and rear ends of the inner surface 31b of the wind direction adjusting blade 31 and the horizontal line is the inclination angle θ1 of the wind direction adjusting blade 31, and the straight line connecting the front and rear ends of the outer surface 32a of the Coanda blade 32 and the horizontal line Is the inclination angle θ2 of the Coanda blade 32, the opening angle between the wind direction adjusting blade 31 and the Coanda blade 32 is θ = θ2−θ1. Note that θ1 and θ2 are not absolute values, and are negative values when they are below the horizontal line in the front view of FIG. 4B.

  In both “Coanda airflow forward blowing” and “Coanda airflow ceiling blowing”, the wind direction adjusting blade 31 and the Coanda blade 32 have an inner angle formed by the tangent of the end F of the scroll 17 and the Coanda blade 32 and the tangent of the end F of the scroll 17. It is preferable to take a posture that satisfies the condition that it is larger than the inner angle formed by the wind direction adjusting blade 31.

  5A (the inner angle R2 formed by the tangent line L0 of the terminal end F of the scroll 17 and the Coanda blade 32 when the Coanda airflow is blown forward and the tangent line L0 of the terminal end F of the scroll 17 and the airflow direction adjusting blade 31 are formed. Comparison diagram with inner angle R1) and FIG. 5B (inner angle R2 formed between tangent L0 of end F of scroll 17 and Coanda blade 32 when Coanda airflow ceiling is blown, tangent L0 of end F of scroll 17 and wind direction adjusting blade 31) (Refer to the comparison figure with the internal angle R1).

  Further, as shown in FIGS. 5A and 5B, in the Coanda blade 32 in the Coanda effect utilization mode, the tip of the Coanda blade 32 is located forward and upward from the horizontal, and is located outward and upward from the air outlet 15. As a result, the Coanda airflow reaches further, and the generation of a strong airflow that passes above the Coanda blade 32 is suppressed, and the upward induction of the Coanda airflow is less likely to be inhibited.

  In addition, since the height position of the rear end portion of the Coanda blade 32 is lower than when the operation is stopped, a Coanda airflow is easily generated due to the Coanda effect on the upstream side.

(3-2-1) Coanda Airflow Forward Blow FIG. 3C is a side view of the wind direction adjusting blade 31 and the Coanda blade 32 during the Coanda airflow forward blow. In FIG. 3C, when “Coanda airflow forward blowing” is selected, the control unit 40 moves the airflow direction adjustment blade 31 until the tangent L1 at the front end E1 of the inner side surface 31b of the airflow direction adjustment blade 31 becomes lower than the horizontal. Rotate.

  Next, the control unit 40 rotates the Coanda blade 32 until the outer surface 32a of the Coanda blade 32 becomes substantially horizontal. When the outer side surface 32a of the Coanda blade 32 has an arcuate curved surface as in the present embodiment, the Coanda blade 32 is rotated until the tangent L2 at the front end E2 of the outer surface 32a becomes substantially horizontal. That is, as shown in FIG. 5A, the inner angle R2 formed by the tangent line L0 and the tangent line L2 is larger than the inner angle R1 formed by the tangent line L0 and the tangent line L1.

  The conditioned air adjusted by the wind direction adjusting blade 31 to the front lower blowing becomes a flow attached to the outer surface 32a of the Coanda blade 32 by the Coanda effect, and changes to a Coanda airflow along the outer surface 32a.

  Therefore, even if the tangent L1 direction at the front end E1 of the airflow direction adjusting blade 31 is the front lower blowing, the tangential L2 direction at the front end E2 of the Coanda blade 32 is horizontal, so that the conditioned air is generated by the Coanda effect by the Coanda effect. It blows off in the tangent L2 direction at the front end E2 of the outer side surface 32a, that is, in the horizontal direction.

  In this way, the Coanda blades 32 are separated from the front surface of the indoor unit and the inclination becomes gentle, and the conditioned air becomes more susceptible to the Coanda effect in front of the front panel 11b. As a result, even if the conditioned air whose wind direction has been adjusted by the wind direction adjusting blade 31 is the front lower blowing, it becomes horizontal blowing air due to the Coanda effect. The air direction is changed while the pressure loss due to the airflow resistance of the air direction adjusting blade 31 is suppressed as compared with the method in which the air immediately after passing through the air outlet is brought close to the front panel and is directed upward by the Coanda effect of the front panel.

(3-2-2) Coanda Airflow Ceiling Blow FIG. 3D is a side view of the wind direction adjusting blade 31 and the Coanda blade 32 when the Coanda airflow ceiling is blown. In FIG. 3D, when “Coanda airflow ceiling blowing” is selected, the control unit 40 rotates the airflow direction adjusting blade 31 until the tangent L1 at the front end E1 of the inner side surface 31b of the airflow direction adjusting blade 31 becomes horizontal.

  Next, the control part 40 rotates the Coanda blade | wing 32 until the tangent L2 in the front end E2 of the outer side surface 32a becomes front upward. That is, as shown in FIG. 5B, the inner angle R2 formed by the tangent line L0 and the tangent line L2 is larger than the inner angle R1 formed by the tangent line L0 and the tangent line L1. The conditioned air adjusted to be blown horizontally by the airflow direction adjusting blade 31 becomes a flow adhered to the outer surface 32a of the Coanda blade 32 by the Coanda effect, and changes to a Coanda airflow along the outer surface 32a.

  Therefore, even if the tangent L1 direction at the front end E1 of the wind direction adjusting blade 31 is forward blowing, the tangential L2 direction at the front end E2 of the Coanda blade 32 is forward upward blowing, so that the conditioned air is generated by the Coanda effect by the Coanda effect. It blows out in the tangent L2 direction at the front end E2 of the outer side surface 32a, that is, the ceiling direction. Since the front end portion of the Coanda blade 32 protrudes outward from the air outlet 15, the Coanda airflow reaches further away. Furthermore, since the tip of the Coanda blade 32 is located above the air outlet 15, the generation of an airflow that passes above the Coanda blade 32 is suppressed, and the upward induction of the Coanda airflow is hardly inhibited. .

  In this way, the Coanda blades 32 are separated from the front surface of the indoor unit and the inclination becomes gentle, and the conditioned air becomes more susceptible to the Coanda effect in front of the front panel 11b. As a result, even if the conditioned air whose wind direction is adjusted by the wind direction adjusting blade 31 is blown forward, it becomes upward air due to the Coanda effect.

  The size in the longitudinal direction of the Coanda blade 32 is not less than the size in the longitudinal direction of the wind direction adjusting blade 31. Therefore, all of the conditioned air whose wind direction is adjusted by the wind direction adjusting blade 31 can be received by the Coanda blade 32, and the effect of preventing the conditioned air from being short-circuited from the side of the Coanda blade 32 is also achieved.

(3-2-3) Unexpected Wind FIG. 6B is a side view of the air-conditioning indoor unit installation space showing the wind direction of the conditioned air when the wind direction adjusting blade 31 faces downward. FIG. 6C is a side view of the air conditioning indoor unit installation space showing the wind direction of the Coanda airflow when the Coanda blade 32 is in the ceiling blowing posture.

  6B and 6C, the wind directed toward the human body 400 as shown in FIG. 6B is changed to the upward Coanda airflow as shown in FIG. 6C using the Coanda effect, and then the reverse operation is performed. An unexpected wind that suddenly hits the human body 400 can be created.

  For example, when the wind direction adjusting blade 31 directs conditioned air in the direction in which the resident is present, the boundary between the region in which the Coanda blade 32 generates the Coanda effect and the region in which the Coanda effect does not occur with an irregular cycle. When moving across the area, the generation and disappearance of the Coanda airflow is repeated, creating a wind that suddenly hits the resident.

(3-2-4) Fluctuating airflow A
The fluctuation airflow is an airflow generated by irregularly changing the wind direction of the conditioned air, and is different from the automatic wind direction described in (3-1-3) in that the wind direction is irregularly changed. is there.

  FIG. 7 is a flowchart showing the operation of the wind direction adjusting blade 31 and the Coanda blade 32 during the fluctuation airflow A control. In FIG. 7, the wind direction adjusting blade 31 swings between an upper limit position and a lower limit position with an operation of waiting at an intermediate position interposed therebetween. The control unit 40 irregularly changes the time during which the wind direction adjusting blade 31 waits at the intermediate position (hereinafter referred to as the intermediate position standby time), and thereby the wind moving away from the wind approaching the resident. Since the combination of the two is irregularly changed, it is possible to provide residents with various winds.

  Further, the Coanda blade 32 swings between the upper limit position and the lower limit position. As shown in FIG. 7, in the fluctuation airflow control, while the Coanda blade 32 swings between the upper limit position and the lower limit position, the airflow direction adjustment blade 31 swings between the upper limit position and the intermediate position. One pattern and a second pattern in which the wind direction adjusting blade 31 swings between the intermediate position and the lower limit position while the Coanda blade 32 stands by at the upper limit position are included.

  In the first pattern, the operation in which the Coanda blade 32 moves from the upper limit position to the lower limit position is synchronized with the timing at which the wind direction adjustment blade 31 moves from the intermediate position to the upper limit position. The operation of the Coanda blade 32 moving from the lower limit position to the upper limit position is synchronized with the timing when the wind direction adjusting blade 31 is moved from the upper limit position to the intermediate position.

  When the wind direction adjusting blade 31 is in the intermediate position, the Coanda blade 32 is controlled so as to be in the upper limit position, so that no Coanda airflow is generated. Therefore, when the intermediate position standby time of the wind direction adjusting blade 31 is irregularly changed, the time during which the Coanda airflow is not generated is irregularly changed, and the intervals at which the wind is unexpectedly changed are irregularly changed by the residents. A variety of winds can be provided.

  In the intermediate position standby time of the wind direction adjusting blade 31, since it is desired to blow conditioned air stably in one direction, in this embodiment, the wind direction adjusting blade 31 is in the intermediate position and the Coanda blade 32 is in the upper limit position. Time is measured as standby time.

  Moreover, the control part 40 can also change each of the time which the wind direction adjustment blade | wing 31 waits in an upper limit position, and the time which waits in a lower limit position irregularly. Furthermore, the control unit 40 can irregularly change the time that the Coanda blade 32 waits at the lower limit position.

  As described above, the wind direction adjusting blade 31 and the Coanda blade 32 swing irregularly, so that conditioned air close to natural wind can be provided to the occupant.

(3-2-5) Fluctuating airflow B
FIG. 8 is a flowchart showing the operation of the wind direction adjusting blade 31 and the Coanda blade 32 and the fan rotation speed of the indoor fan 14 during the fluctuation airflow B control. In FIG. 8, the operation of the wind direction adjusting blade 31 and the Coanda blade 32 is the same as that during the fluctuation airflow A control, but the fan rotational speed of the indoor fan 14 is changed according to the operation of the wind direction adjusting blade 31 and the Coanda blade 32. Is different from the fluctuation airflow A control.

  In particular, in the fluctuation airflow B control, when the Coanda blade 32 starts moving from the upper limit position to the lower limit position, the fan rotation speed of the indoor fan 14 is increased to a predetermined value. The predetermined value here refers to the number of rotations of the fan for ensuring the minimum air volume that allows the wind separated from the Coanda blades 32 to reach the occupant.

  Therefore, when the fan rotation speed of the indoor fan 14 rises to a predetermined value at the time when the Coanda blade 32 starts moving from the upper limit position to the lower limit position, the airflow is peeled off from the Coanda blade 32 and directed toward the resident. Unexpected wind is realized because the airflow surely reaches the residents.

(4) Operation Here, the operation of the wind direction adjusting blade 31 and the Coanda blade 32 during the fluctuation airflow B control will be described with reference to FIG. In FIG. 8, when the wind direction mode is switched from the fixed wind direction control to the fluctuation air flow B control, the wind direction adjusting blade 31 temporarily moves to the intermediate position and stands by. At the same time, the Coanda blade 32 moves to the upper limit position and stands by. The control unit 40 measures the standby time starting from the time when the wind direction adjusting blade 31 reaches the intermediate position and the Coanda blade 32 reaches the upper limit position.

  The wind direction adjusting blade 31 starts moving to the lower limit position after the first standby time tf1 has elapsed, and after reaching the lower limit position, it stops at the lower limit position for a predetermined time and starts moving again to the intermediate position. The wind direction adjusting blade 31 that has moved to the intermediate position then waits for the second waiting time tf2 and then starts to move to the upper limit position. At this time, the Coanda blade 32 starts to move to the lower limit position in synchronization. The Coanda blade 32 that has reached the lower limit position waits there for a predetermined time and then starts to rise toward the upper limit position.

  The wind direction adjusting blade 31 that has reached the upper limit position also stands by for a certain period of time, and starts moving toward the intermediate position synchronously when the Coanda blade 32 starts moving to the upper limit position. The wind direction adjusting blade 31 that has reached the intermediate position waits there. During this time, the Coanda blade 32 reaches the upper limit position. The control unit 40 measures the standby time starting from the time when the wind direction adjusting blade 31 reaches the intermediate position and the Coanda blade 32 reaches the upper limit position.

  The wind direction adjusting blade 31 starts moving to the upper limit position after waiting for the second waiting time tf3. At this time, the Coanda blade 32 starts to move to the lower limit position in synchronization. The Coanda blade 32 that has reached the lower limit position waits there for a predetermined time and then starts to rise toward the upper limit position.

  The wind direction adjusting blade 31 that has already reached the upper limit position is also waiting there for a certain period of time, but in synchronization with the Coanda blade 32 starting to move to the upper limit position, it moves toward the intermediate position. Start. Thereafter, it operates according to wind direction patterns with different standby times set in advance.

  In addition, the control part 40 can also change each of the time for which the wind direction adjustment blade | wing 31 waits in an upper limit position, and the time which waits in a lower limit position irregularly. Furthermore, the control unit 40 can irregularly change the time that the Coanda blade 32 waits at the lower limit position.

  The fan rotation speed of the indoor fan 14 repeatedly rises and falls irregularly according to a preset fluctuation amount pattern. However, while the Coanda blade 32 is at the lower limit position, the fan rotation speed is irregularly changed within a predetermined value or more. Then, when the Coanda blade 32 starts to move from the lower limit position to the upper limit position and the Coanda blade 32 reaches the upper limit position, the restriction is released and the fan rotation speed is changed irregularly.

  Thus, by changing the fan rotation speed of the indoor fan 14 in accordance with the operation of the wind direction adjusting blade 31 and the Coanda blade 32, low-frequency fluctuations and swells are realized, and conditioned air that is closer to natural wind is occupant. Can be provided. Furthermore, for the period in which the Coanda blade 32 moves from the upper limit position to the lower limit position, waits, and moves to the upper limit position again, in order to ensure the minimum amount of air that the wind peeled off from the Coanda blade 32 can reach the occupants. In addition, the fan speed is controlled to be a predetermined value or more.

(5) Features (5-1)
In the air conditioning indoor unit 10, the control unit 40 controls the operation of the Coanda blade during fluctuation airflow control, and executes a mode including a Coanda generation state in which the Coanda airflow is generated and a Coanda non-generation state in which the Coanda airflow is not generated. Therefore, when the fluctuation airflow control is performed, the flow of the wind is diversified by suddenly generating the Coanda airflow, and the conditioned air closer to the natural wind can be provided to the occupant.

(5-2)
In addition, since the control unit 40 changes the air volume of the conditioned air during fluctuation air flow control, the conditioned air becomes an air flow that is closer to the natural wind by changing the air volume in addition to the wind direction, providing a comfortable air-conditioned space for the residents. can do.

(5-3)
Furthermore, the control unit 40 changes the air volume of the conditioned air to a predetermined value during the time period in which the Coanda airflow is generated, that is, the period during which the Coanda blade 32 moves from the upper limit position to the lower limit position, waits, and moves to the upper limit position again. To do. Therefore, the conditioned air at the moment when the Coanda effect is eliminated can surely reach the occupant, thus realizing an “unexpected wind”.

(6) Modified Example In the above embodiment, both the fluctuation airflow A control and the fluctuation airflow B control, the Coanda generation state in which the Coanda airflow is generated by irregularly swinging the wind direction adjusting blade 31 and the Coanda blade 32, and the Coanda. Although the mode including the Coanda non-generation state that does not generate the airflow is realized, it is not limited to this. Below, the modification of fluctuation airflow control is demonstrated.

(6-1) First Modification FIG. 9 is a flowchart showing the operations of the wind direction adjusting blade 31 and the Coanda blade 32 during fluctuation airflow control in the first modification. In FIG. 9, the fluctuation airflow control in the first modification is performed by oscillating only the airflow direction adjusting blade 31 and the time zone in which the A mode in which the airflow direction adjusting blade 31 and the Coanda blade 32 are swung to generate the fluctuating airflow is executed. It is characterized by mixing the time zone in which the B mode for generating the fluctuation airflow is executed.

  About A mode, it is the same as the fluctuation airflow A control of the said embodiment, and the wind direction adjustment blade | wing 31 rock | fluctuates between an upper limit position and a lower limit position on both sides of the operation | movement which waits in an intermediate position. The control unit 40 irregularly changes the time that the wind direction adjusting blade 31 waits at the intermediate position, and thereby, the combination of the wind approaching the resident and the wind moving away is irregularly changed, so that the residence A variety of winds can be provided to the person.

  Further, the Coanda blade 32 swings between the upper limit position and the lower limit position. The controller 40 irregularly changes the time during which the Coanda blade 32 waits at the upper limit position, and accordingly, the time during which the Coanda airflow is not generated irregularly changes, and the wind blows unexpectedly to the resident. Since the intervals are changed irregularly, various winds can be provided by residents.

  In the B mode, since the Coanda blade 32 is moved to the fully closed position, the Coanda airflow is not always generated regardless of the upper and lower limit positions of the wind direction adjusting blade 31. Still, the wind direction adjusting blade 31 swings between the upper limit position and the lower limit position with the operation of waiting at the intermediate position interposed therebetween. At that time, the control unit 40 irregularly changes the time during which the wind direction adjusting blade 31 waits at the intermediate position, and thereby, the combination of the wind approaching the resident and the wind moving away is irregularly switched. So it can provide residents with a variety of winds.

  In other words, by mixing the A mode and the B mode, a variety of winds are realized by alternately repeating the fluctuation air flow with “unexpected wind” and the fluctuation air flow with “unexpected wind”. .

(6-2) Second Modification FIG. 10 is a flowchart showing the operation of the wind direction adjusting blade 31 and the Coanda blade 32 during fluctuation airflow control in the second modification. In FIG. 10, the fluctuation airflow control in the second modification includes a C mode in which only the Coanda blade 32 is swung to generate a fluctuation airflow in addition to the A mode and the B mode of the fluctuation airflow control in the first modification. It is characteristic that it is made to do.

  In the C mode, for example, when the direction of the conditioned air is constant due to the wind direction adjusting blade 31 being stationary at an intermediate position, the Coanda blade 32 is instantaneously adsorbed on the lower surface of the Coanda blade 32 and becomes a Coanda airflow. A state where it is not suitable for the resident and a state where the Coanda effect is canceled and the resident is again directed are repeated. That is, a certain “unexpected wind” can be generated.

  In other words, by mixing A mode, B mode, and C mode, the fluctuation airflow with "unexpected wind", the fluctuation airflow with "unexpected wind", and the fluctuation airflow with one direction "unexpected wind" A variety of winds are realized by alternately repeating and.

  As described above, according to the present invention, conditioned air close to natural wind can be provided to the occupant, so that it is useful not only for wall-mounted air conditioning indoor units but also for air purifiers.

DESCRIPTION OF SYMBOLS 10 Air-conditioning indoor unit 15 Air outlet 31 Wind direction adjustment blade 32 Coanda blade 40 Control part

JP 2001-41538 A

Claims (7)

An air conditioning indoor unit that generates a fluctuating air flow by changing the wind direction of conditioned air blown from the air outlet (15) up and down,
A Coanda blade (32) that is provided in the vicinity of the air outlet (15) and guides the conditioned air into a Coanda airflow along its lower surface by the Coanda effect in a predetermined direction;
A control unit (40) for controlling the fluctuation airflow of the conditioned air;
With
The control unit (40) controls the operation of the Coanda blade (32) during the fluctuation airflow control to generate a Coanda generation state in which the Coanda airflow is generated and a Coanda non-generation state in which the Coanda airflow is not generated. Execute a first mode including:
Air conditioning indoor unit. An air conditioning indoor unit that generates a fluctuating air flow by changing the wind direction of conditioned air blown from the air outlet (15) up and down,
A Coanda blade (32) that is provided in the vicinity of the air outlet (15) and guides the conditioned air into a Coanda airflow along its lower surface by the Coanda effect in a predetermined direction;
A control unit (40) for controlling the fluctuation airflow by changing a wind direction change pattern of the conditioned air;
With
The control unit (40) includes at least
A first mode including a Coanda generation state in which the Coanda blade (32) is controlled to generate the Coanda airflow and a Coanda non-generation state in which the Coanda airflow is not generated during the fluctuation airflow control;
A second mode in which the Coanda airflow is not always generated during the fluctuation airflow control;
Is preset as an executable mode,
The control unit (40) mixes a time zone for executing the first mode and a time zone for executing the second mode during the fluctuation airflow control.
Air conditioning indoor unit. A wind direction adjusting blade (31) for changing the blowing angle of the conditioned air with respect to a horizontal plane;
The controller (40) controls the fluctuating airflow using one or both of the wind direction adjusting blade (31) and the Coanda blade (32).
The air conditioning indoor unit according to claim 1 or 2. The fluctuation air flow control is
A mode in which the wind direction adjusting blade (31) and the Coanda blade (32) are swung to generate a fluctuating air flow;
B mode in which only the wind direction adjusting blade (31) is swung to generate a fluctuating air flow;
including,
The air conditioning indoor unit according to claim 3. The fluctuation air flow control is
Further includes a C mode in which only the Coanda blade (32) is swung to generate a fluctuating airflow;
The air conditioning indoor unit according to claim 4. The control unit (40) changes the air volume of the conditioned air during the fluctuation airflow control.
The air conditioning indoor unit according to claim 1 or 2. The control unit (40) changes the air volume of the conditioned air to a predetermined air volume at least in a time zone in which the Coanda air current is generated.
The air conditioning indoor unit according to claim 6.

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