JP5408319B1 - Air conditioning indoor unit - Google Patents

Abstract

An air-conditioning indoor unit is provided that prevents air from hitting a resident at the initial stage of cooling operation and gives the resident a cool feeling after the room temperature is stabilized.
In an air conditioning indoor unit, when the room temperature Tr is not within the target temperature range (Ts ± a) based on the set temperature Ts, the upward air flow mode is executed in order to reach the corners of the room. The When the room temperature Tr is within the target temperature range, the temperature of the conditioned air is also high, so that the occupant can feel a cool sensation by performing the up / down wind direction mode.
[Selection] Figure 9

Description

  The present invention relates to an air conditioning indoor unit.

  In general, the temperature distribution in the room is non-uniform in the initial stage of the cooling operation. In order to solve this problem, for example, an air conditioner described in Patent Document 1 (Japanese Patent Application Laid-Open No. 2004-108652) blows conditioned air forward and downward with a “strong” air volume, and the air current flows to every corner of the room. Keep it close.

  However, the temperature of the conditioned air at this stage is low, and a forward downward blow that directly hits a person is unpreferable because it causes discomfort to the residents.

  On the other hand, after the room temperature is stabilized, the temperature of the conditioned air is high, and the state in which the conditioned air does not hit the person at all does not meet the resident's desire for a cool feeling.

  An object of the present invention is to provide an air-conditioning indoor unit that prevents the occupant from being blown by air at the initial stage of cooling operation and gives the occupant a cool feeling after the room temperature is stabilized.

  An air-conditioning indoor unit according to a first aspect of the present invention is an air-conditioning indoor unit that can change the direction of conditioned air blown from a blow-out port in a predetermined direction, and includes a wind direction adjusting blade and a control unit. The wind direction adjusting blade changes the blowing angle of the conditioned air with respect to the horizontal plane. The control unit is set to be able to select automatic wind direction control that automatically changes the direction of the conditioned air via the wind direction adjusting blade. The wind direction automatic control includes at least an upward air flow mode and an up / down wind direction mode. The upward air flow mode controls the direction of the conditioned air to be horizontal or upward. In the up / down wind direction mode, the conditioned air is applied to a person while changing the direction of the conditioned air up and down. In addition, when the air direction automatic control is selected in the cooling operation, the control unit executes the upward air flow mode in a situation where the room temperature is not in the stable region, and executes the up / down air direction mode in a situation where the room temperature is in the stable region.

  In this air conditioning indoor unit, when the room temperature is not in the stable range, the upward air flow mode is executed in order to allow the air flow to reach every corner of the room. When the room temperature is in the stable range, the temperature of the conditioned air is also high. Therefore, when the up-and-down wind direction mode is executed, the wind can hit the occupant and give a cool feeling.

  The air conditioning indoor unit according to the second aspect of the present invention is the air conditioning indoor unit according to the first aspect, and in the up / down air direction mode, a fluctuation air flow is generated by mixing a plurality of wind direction change patterns.

  In this air conditioning indoor unit, the conditioned air swings up and down by the wind direction adjusting blades, and the pattern of gradually approaching and gradually moving away from the occupant is different each time, giving a more comfortable cool feeling than when applying fixed wind be able to.

  The air conditioning indoor unit according to the 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 Coanda blade. 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. In the upward airflow mode, the conditioned air becomes an upward Coanda airflow by the Coanda blade.

  In this air conditioning indoor unit, the conditioned air becomes an upward Coanda airflow due to the Coanda effect, and can reach farther. Therefore, even when the height distance from the blower outlet to the ceiling and the face-to-face distance from the blower outlet to the facing wall are both large, the conditioned air can be uniformly distributed to the air-conditioning target space.

  An air conditioning indoor unit according to a fourth aspect of the present invention is the air conditioning indoor unit according to the third aspect, and in the up / down wind direction mode, while generating a fluctuation air flow by mixing a plurality of wind direction change patterns, the Coanda air flow And a time zone in which the Coanda air current is not generated are mixed.

  In this air-conditioning indoor unit, when conditioned air hits the resident, the Coanda airflow is generated and at the same time the resident air does not hit, and the Coanda effect is canceled and the conditioned air hits the resident at the same time. You can feel the wind close to the “natural wind blowing unexpectedly”.

  The air conditioning indoor unit according to the fifth aspect of the present invention is the air conditioning indoor unit according to the first aspect, wherein the stable region is within the target temperature range based on the set temperature.

  In this air conditioning indoor unit, if the room temperature becomes the set temperature, the stable range may not be reached depending on the outside air temperature, etc. It is more reasonable to set the stable range within the target temperature range based on

  An air conditioner indoor unit according to a sixth aspect of the present invention is the air conditioner indoor unit according to the fifth aspect, and further includes a temperature sensor installed in a suction flow path for sucking room air. The control unit determines that the room temperature is in the stable range when the temperature detected by the temperature sensor is within the target temperature range.

  In this air conditioner indoor unit, it is usually possible to determine whether or not the room temperature is in the stable range using the existing temperature sensor in view of the fact that the temperature sensor is installed in the suction channel for detecting the room temperature. Is reasonable.

  An air conditioning indoor unit according to a seventh aspect of the present invention is the air conditioning indoor unit according to the first aspect, and in the upward airflow mode, a circulating airflow is generated in which conditioned air circulates in the room.

  In this air conditioning indoor unit, the conditioned air circulates along each surface in the order of the ceiling surface, the wall surface, and the floor surface, so that the conditioned air reaches the entire room and the temperature distribution tends to be uniform.

  In the air conditioning indoor unit according to the first aspect of the present invention, when the room temperature is not in the stable range, the upward airflow mode is executed in order to allow the airflow to reach every corner of the room. When the room temperature is in the stable range, the temperature of the conditioned air is also high. Therefore, when the up-and-down wind direction mode is executed, the wind can hit the occupant and give a cool feeling.

  In the air-conditioning indoor unit according to the second aspect of the present invention, the conditioned air is swung up and down by the wind direction adjusting blades, and the pattern of gradually approaching and gradually moving away from the occupant is different every time. It can give a more comfortable cool feeling.

  In the air conditioning indoor unit pertaining to the third aspect of the present invention, the conditioned air becomes an upward Coanda airflow due to the Coanda effect, and can reach further away. Therefore, even when the height distance from the blower outlet to the ceiling and the face-to-face distance from the blower outlet to the facing wall are both large, the conditioned air can be uniformly distributed to the air-conditioning target space.

  In the air conditioning indoor unit according to the fourth aspect of the present invention, when the conditioned air hits the resident, the Coanda air current is generated and at the same time the resident air does not hit the resident, and the Coanda effect is eliminated and the conditioned air is released at the same time. Therefore, residents can feel a wind close to “natural wind blowing unexpectedly”.

  In the air conditioning indoor unit according to the fifth aspect of the present invention, if the state where the room temperature becomes the set temperature is set as the stable range, there is a possibility that the stable range may not be reached depending on the outside temperature or the like. It is more reasonable to make the stable range within the target temperature range based on the set temperature.

  In the air conditioning indoor unit according to the sixth aspect of the present invention, in view of the fact that the temperature sensor is usually installed in the suction flow path for room temperature detection, is the room temperature in the stable range using the existing temperature sensor? Since it can be judged whether or not, it is reasonable.

  In the air conditioning indoor unit pertaining to the seventh aspect of the present invention, the conditioned air circulates along each surface in the order of the ceiling surface, wall surface, and floor surface, so that the conditioned air reaches the entire room and the temperature distribution tends to be uniform.

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 and Coanda blade | wing at the time of fluctuation airflow control. The flowchart of the circulating airflow control by a wind direction adjustment blade | wing. The flowchart of the circulating airflow control by a wind direction adjustment blade | wing 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 strong airflow that passes above the Coanda blades 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 outlet 15, the generation of an airflow that passes above the Coanda blade 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 Fluctuating airflow is airflow generated by irregularly changing the wind direction of conditioned air, and (3-1-3) in that the wind direction is irregularly changed. This is different from the automatic wind direction described in.

  FIG. 7 is a flowchart showing the operation of the wind direction adjusting blade 31 and the Coanda blade 32 during fluctuation airflow 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 approaching the resident and the wind moving away. 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.

  As described above, the fluctuation airflow is generated by mixing a plurality of wind direction change patterns, but is not limited to the method of mixing the first pattern and the second pattern as described above, but only the first pattern. Can also be generated by a method of changing the intermediate position standby time of the wind direction adjusting blade 31.

  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 the intermediate position 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.

(4) Circulating airflow control during cooling operation This control executes an upward airflow mode for controlling the direction of the conditioned air horizontally or upward in order to avoid giving a draft feeling due to the impact of cold air at the start of cooling operation. After the room temperature is stabilized, the control is executed to execute the up / down wind direction mode in which conditioned air is applied in order to give the resident a cool breeze.

(4-1) Circulating Airflow Control by Wind Direction Adjusting Blade 31 FIG. 8 is a flowchart of the circulating airflow control by the wind direction adjusting blade 31. In FIG. 8, the control unit 40 determines whether or not the current operation is the cooling operation in step S1, and proceeds to step S2 if it is the cooling operation, and continues step S1 if it is not the cooling operation. .

In step S2, the control unit 40 determines whether or not the room temperature Tr is stable. If it is not stable, the control unit 40 proceeds to step S3. If it is stable, the control unit 40 proceeds to step S5. The room temperature Tr is detected by a temperature sensor 49 provided on the suction port side of the main body casing 11. Further, the room temperature is said to be stable when the room temperature Tr is within the target temperature range (Ts ± a) based on the set temperature Ts.

  In step S3, the control unit 40 executes the upward air flow mode and generates a circulating air flow that circulates in the room. Note that the upward airflow mode is a mode for allowing the orientation of the airflow direction adjusting blade 31 to remain at the upper limit position shown in FIG. 6A and spreading the conditioned air over the entire room by the upward airflow.

  In step S4, the control unit 40 determines again whether or not the room temperature Tr is stable. If the room temperature Tr is stable, the control unit 40 proceeds to step S5, and if not, continues to step S3.

  In step S5, the control unit 40 executes the up / down wind direction mode and applies conditioned air to the resident. The up / down air direction mode is the up / down air direction shown in FIG. 6A.

  As described above, when the room temperature Tr is not stable, the upward air flow mode is executed to reach the air in every corner of the room, and when the room temperature is stable, the up / down air direction mode is executed. By this, the conditioned air can hit the resident and give a cool feeling.

(4-2) Circulating Airflow Control by Wind Direction Adjusting Blade 31 and Coanda Blade 32 FIG. 9 is a flowchart of the circulating airflow control by the wind direction adjusting blade 31 and the Coanda blade 32. In FIG. 9, step S11, step S12, and step S14 are the same as step S1, step S2, and step S4 in FIG. 8, and therefore description thereof is omitted, and only step S13 and step S14 are described.

  In step S13, [Coanda airflow ceiling blowing] is applied to the upward airflow mode in step S3 in FIG. Since the conditioned air circulates along each surface in the order of the ceiling surface, the wall surface, and the floor surface by the Coanda airflow ceiling blowing, the conditioned air reaches the entire room and the temperature distribution tends to be uniform.

  In step S15, [fluctuating airflow] is applied to the up / down wind direction mode in step S5 in FIG. The fluctuation airflow mode is the fluctuation airflow control described with reference to FIG. 7, and the conditioned air close to the natural wind gives a cool feeling to the occupants when the wind direction adjusting blade 31 and the Coanda blade 32 swing irregularly. it can.

(5) Features (5-1)
In the air conditioning indoor unit 10, when the room temperature Tr is not within the target temperature range (Ts ± a) based on the set temperature Ts, the upward air flow mode is executed in order to allow the air flow to reach every corner of the room. When the room temperature Tr is within the target temperature range, the temperature of the conditioned air is also high, so that the occupant can feel a cool sensation by performing the up / down wind direction mode.

(5-2)
By applying [fluctuating airflow] to the vertical wind direction mode, the conditioned air is swung up and down by the wind direction adjusting blades, and the pattern of gradually approaching and gradually moving away from the occupant is different every time, so apply fixed wind It can give a cool feeling more comfortable than usual.

(5-3)
By applying [Coanda Airflow Ceiling Blow] to the upward airflow mode, the conditioned air becomes an upward Coanda airflow due to the Coanda effect, and can reach farther. That is, a circulating airflow circulating in the room is generated. Therefore, even when the height distance from the blower outlet to the ceiling and the face-to-face distance from the blower outlet to the facing wall are both large, the conditioned air can be uniformly distributed to the air-conditioning target space.

(5-4)
Fluctuating airflow includes a time zone in which the Coanda airflow is generated and a time zone in which the Coanda airflow is not generated. Therefore, when the conditioned air strikes the resident, the conditioned air is generated at the same time as the Coanda airflow is generated. As the Coanda effect is eliminated and conditioned air hits the resident, the resident can feel a wind close to “natural wind blowing unexpectedly”.

  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 2004-108652 A

Claims (7)

An air conditioning indoor unit capable of changing the direction of conditioned air blown out from the air outlet (15) in a predetermined direction,
A wind direction adjusting blade (31) for changing a blowing angle of the conditioned air with respect to a horizontal plane;
A control unit (40) in which an automatic wind direction control for automatically changing the direction of the conditioned air via the wind direction adjusting blade (31) is set to be selectable;
With
In the wind direction automatic control, at least,
An upward airflow mode for controlling the direction of the conditioned air to be horizontal or upward;
While changing the direction of the conditioned air up and down, the up and down wind direction mode that applies the conditioned air to a person,
Is included,
The control unit (40), when the wind direction automatic control is selected in the cooling operation,
In the situation where the room temperature is not in the stable range, the upward air flow mode is
In the situation where the room temperature is in the stable range, the up / down wind direction mode is
Run,
Air conditioning indoor unit. In the up-and-down wind direction mode, a fluctuation air flow is generated by mixing a plurality of wind direction change patterns.
The air conditioning indoor unit according to claim 1. A Coanda blade (32) provided in the vicinity of the air outlet (15) for guiding the conditioned air into a Coanda airflow along its lower surface by a Coanda effect, in a predetermined direction;
In the upward airflow mode, the conditioned air becomes an upward Coanda airflow by the Coanda blade (32).
The air conditioning indoor unit according to claim 1 or 2. In the up-and-down wind direction mode, while generating a fluctuation airflow by mixing a plurality of wind direction change patterns, a time zone in which the Coanda airflow is generated and a time zone in which the Coanda airflow is not generated are mixed.
The air conditioning indoor unit according to claim 3. The stable range is within a target temperature range based on a set temperature.
The air conditioning indoor unit according to claim 1. It further comprises a temperature sensor installed in the suction flow path for sucking room air,
The controller (40) determines that the room temperature is in the stable range when the temperature detected by the temperature sensor is within the target temperature range.
The air conditioning indoor unit according to claim 5. In the upward airflow mode, a circulating airflow in which the conditioned air circulates in the room is generated.
The air conditioning indoor unit according to claim 1.

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