EP2918930B1 - Air-conditioning indoor unit - Google Patents

Air-conditioning indoor unit Download PDF

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Publication number
EP2918930B1
EP2918930B1 EP13837777.5A EP13837777A EP2918930B1 EP 2918930 B1 EP2918930 B1 EP 2918930B1 EP 13837777 A EP13837777 A EP 13837777A EP 2918930 B1 EP2918930 B1 EP 2918930B1
Authority
EP
European Patent Office
Prior art keywords
coanda
blade
airflow
wind direction
direction adjusting
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP13837777.5A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2918930A1 (en
EP2918930A4 (en
Inventor
Takashige Mori
Yuuki Fujioka
Takahiro Nakata
Atsushi Matsubara
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Daikin Industries Ltd
Original Assignee
Daikin Industries Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Daikin Industries Ltd filed Critical Daikin Industries Ltd
Publication of EP2918930A1 publication Critical patent/EP2918930A1/en
Publication of EP2918930A4 publication Critical patent/EP2918930A4/en
Application granted granted Critical
Publication of EP2918930B1 publication Critical patent/EP2918930B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/0007—Indoor units, e.g. fan coil units
    • F24F1/0011—Indoor units, e.g. fan coil units characterised by air outlets
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/0007—Indoor units, e.g. fan coil units
    • F24F1/0043—Indoor units, e.g. fan coil units characterised by mounting arrangements
    • F24F1/0057—Indoor units, e.g. fan coil units characterised by mounting arrangements mounted in or on a wall
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
    • F24F11/79—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling the direction of the supplied air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/08—Air-flow control members, e.g. louvres, grilles, flaps or guide plates
    • F24F13/10—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers
    • F24F13/14—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers built up of tilting members, e.g. louvre
    • F24F13/1413—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers built up of tilting members, e.g. louvre using more than one tilting member, e.g. with several pivoting blades
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2221/00—Details or features not otherwise provided for
    • F24F2221/28—Details or features not otherwise provided for using the Coanda effect

Definitions

  • the present invention relates to an air conditioner indoor unit, and more specifically an air conditioner indoor unit that uses the Coanda effect.
  • Document JP 2007 051 866 A is directed to an air conditioner capable of uniform temperature distribution or ion density distribution in an entire room.
  • the air conditioner comprises a wind direction adjusting blade for changing the blowout angle of the conditioned air in relation to horizontal plane, wherein the blowout angle is changed depending on a temperature difference between a target temperature and a room temperature.
  • a purpose of the present invention is to provide an air conditioner indoor unit that, through varying the flow of wind, realizes conditioned air more closely resembling natural wind.
  • An air conditioner indoor unit according to a first aspect of the present invention comprises the features of claim 1..
  • the Coanda blade by the Coanda effect, changes the flow of conditioned air instantaneously to a Coanda airflow toward a predetermined direction. That is, if the Coanda effect is stopped, the Coanda airflow instantaneously switches to the original flow. In the case such as that in which conditioned air is flowing to an occupant, simultaneous with Coanda airflow occurring, the conditioned air ceases flowing to the occupant, while simultaneous with Coanda airflow being stopped, the conditioned air flows to the occupant.
  • This air conditioner indoor unit during fluctuating airflow control, varies the flow of wind by instantaneously generating Coanda airflow, and is thus capable of providing to the occupant conditioned air closer to natural wind.
  • This air conditioning indoor unit is capable of realizing three kinds of fluctuating airflow, including fluctuating airflow through the wind direction adjusting blade only, fluctuating airflow through the Coanda blade only, and fluctuating airflow through the wind direction adjusting blade and the Coanda blade, providing to the occupant fluctuating airflow replete with variation.
  • An air conditioner indoor unit causes the wind direction of conditioned air expelled from an outlet port to change upward and downward, generating fluctuating airflow, and is provided with Coanda blade and a control portion.
  • the Coanda blade provided in the vicinity of an outlet port, forms the conditioned air into a Coanda airflow caused to follow the lower face of the blade itself, guided in a predetermined direction.
  • the control portion controls the fluctuating airflow by changing the wind change patterns. Further, the control portion is set in advance to be capable of implementing modes, being at least a first mode and a second mode.
  • the first mode is a mode that, during fluctuating airflow control, controls the operation of the Coanda blade including a Coanda airflow generating condition that generates Coanda airflow and a Coanda airflow not generated condition that does not generate Coanda airflow.
  • the second mode is a mode that, during fluctuating airflow control, continually does not generate Coanda airflow.
  • the control portion during fluctuating airflow control, mixes the time periods for implementing the first mode and the time periods for implementing the second mode.
  • the Coanda blade by the Coanda effect, changes the flow of conditioned air instantaneously to Coanda airflow toward a predetermined direction. That is, if the Coanda effect is stopped, the Coanda airflow instantaneously switches to the original flow. In the case such as that in which conditioned air flows onto an occupant, simultaneous with Coanda airflow occurring the conditioned air ceases flowing to the occupant, while simultaneous with Coanda airflow being stopped, the conditioned air flows to the occupant.
  • This air conditioner indoor unit during fluctuating airflow control, by mixing the time periods for implementing the first mode and the time periods for implementing the second mode, varies the flow of wind, and is thus capable of providing to the occupant conditioned air closer to natural wind.
  • An air conditioner indoor unit is the air conditioner indoor unit according to the first aspect, in which the fluctuating airflow control includes an A mode and a B mode.
  • the A mode causes the wind direction adjusting blade and the Coanda blade to swing, generating fluctuating airflow.
  • the B mode causes only the wind direction adjusting blade to swing, generating fluctuating airflow.
  • the fluctuating airflow gradually flowing toward and gradually receding from the occupant repeats between a condition in which, due to the swing of the Coanda blade, the airflow instantaneously adheres to the lower face of the Coanda blade becoming Coanda airflow, not directed toward the occupant, and a condition in which the Coanda effect stops, the fluctuating airflow being directed again toward the occupant.
  • the conditioned air is swung up and down by the wind direction adjusting blade, creating fluctuating airflow gradually flowing toward and gradually receding from the occupant. That is, mixing the A mode and the B mode enables realization of fluctuating airflow with "unexpected breeze” and fluctuating airflow without "unexpected breeze".
  • An air conditioner indoor unit is the air conditioner indoor unit according to the third aspect, in which the fluctuating airflow control further includes a C mode for causing only the Coanda blade to swing, generating fluctuating airflow.
  • An air conditioner indoor unit is the air conditioner indoor unit according to either of the first aspect or the second aspect, in which the control portion, during fluctuating airflow control, causes change in the air quantity of the conditioned air.
  • this air conditioner indoor unit by changing the air quantity in addition to wind direction, more comfortable air-conditioned space can be provided to the occupant as the conditioned air becomes airflow still closer to natural wind.
  • An air conditioner indoor unit is the air conditioner indoor unit according to the fifth aspect, in which the control portion changes the air quantity of conditioned air in at least the time periods of the Coanda airflow, to a predetermined air quantity.
  • the air quantity of the conditioned air is changed to the predetermined air quantity, while conditioned air of the moments Coanda effect is stopped is maintained at the predetermined quantity, enabling "unexpected breeze" to be realized.
  • the air conditioner indoor unit during fluctuating airflow control, by instantaneously generating Coanda airflow the flow of wind is varied, thus enabling conditioned air closer to natural wind to be provided to the occupant.
  • three kinds of fluctuating airflow can be realized, including fluctuating airflow from the wind direction adjusting blade only, fluctuating airflow from the Coanda blade only, and fluctuating airflow from the wind direction adjusting blade and the Coanda blade, thus enabling fluctuating airflow replete with variation to be provided to the occupant.
  • the air conditioner indoor unit during fluctuating airflow control, by mixing up the time periods for implementing the first mode and the time periods for implementing the second mode, the flow of wind is varied, thereby enabling conditioned air closer to natural wind to be provided to the occupant.
  • mixing the A mode and the B mode enables airflow with "unexpected breeze” and airflow without “unexpected breeze” to be provided.
  • the air conditioner indoor unit in the C mode, when the direction of the conditioned air is constant, there is repetition between a condition in which, due to the swing of the Coanda blade, the airflow instantaneously adheres to the lower face of the Coanda blade becoming Coanda airflow, not directed toward the occupant, and a condition in which the Coanda effect stops, the fluctuating airflow being directed again toward the occupant. That is, "unexpected breeze" can be regularly generated.
  • the air conditioner indoor unit by changing the air quantity in addition to wind direction, the conditioned air becomes airflow closer to natural wind, enabling more comfortable air-conditioned space to be provided to the occupant.
  • the air quantity of the conditioned air is changed to the predetermined air quantity, and conditioned air of the moments Coanda effect is stopped is maintained at the predetermined air quantity, enabling "unexpected breeze" to be realized.
  • FIG. 1 is a cross-sectional view of an air conditioner indoor unit 10 according to the first embodiment of the present invention during operation shutdown.
  • FIG. 2 is a cross-sectional view of the air conditioner indoor unit 10 during operation.
  • the air conditioner indoor unit 10 is a wall-mounted type, provided with a body casing 11, an indoor heat exchanger 13, an indoor fan 14, a bottom frame 16, and a control portion 40.
  • the body casing 11 has a top surface portion 11a, a front panel 11b, a back plate 11c and a lower horizontal plate 11d, while housed inside are the indoor heat exchanger 13, the indoor fan 14, the bottom frame 16 and the control portion 40.
  • the top surface portion 11a is located to the top of the body casing 11, a suction inlet (not shown in the drawing) being provided in the front portion thereof.
  • the front panel 11b constitutes the front surface portion of the indoor unit, having a flat form with no suction inlet. Further, the upper end of the front panel 11b is rotatably supported to the top surface portion lla, and the front panel 11b is able to operate as a hinge.
  • the indoor heat exchanger 13 and the indoor fan 14 are attached to the bottom frame 16.
  • the indoor heat exchanger 13 performs heat exchange by exchange with through-passing air. Further, the indoor heat exchanger 13, in the side view, forms an inverted V-shape with both ends bent downward, the indoor fan 14 being located below.
  • the indoor fan 14 is a cross flow fan, applying air taken in from inside the room to the indoor heat exchanger 13 and causing this to pass through the indoor heat exchanger 13 before being blown out inside the room.
  • An outlet 15 is provided in the lower portion of the body casing 11.
  • a wind direction adjusting blade 31 that changes the direction of conditioned air blown out from the outlet 15 is installed to the outlet 15 so as to be able to rotate freely.
  • the wind direction adjusting blade 31 can take multiple postures of differing angles of inclination.
  • a Coanda blade 32 is provided in the vicinity of the outlet 15.
  • the Coanda blade 32 driven by a motor (not shown in the drawing), is able to take postures inclined along the forward-rearward direction, and during operation shutdown is housed in a housing portion 130 provided to the front panel 11b.
  • the Coanda blade 32 can take multiple postures of differing angles of inclination.
  • the outlet 15 is linked to the inside of the body casing 11 by an outlet passage 18.
  • the outlet passage 18 is formed following a scroll 17 of the bottom frame 16 from the outlet 15.
  • the control portion 40 is located to the right side of the indoor heat exchanger 13 and the indoor fan 14, viewing the body casing 11 from the front panel 11b, and controls the rotation speed of the indoor fan 14 and the operations of the wind direction adjusting blade 31 and the Coanda blade 32.
  • the front panel 11b extends towards the front edge of the lower horizontal plate 11d while drawing a gently arcing curved surface from the front at the top of the body casing 11.
  • a recessed region is toward the inner side of the body casing 11, at the lower portion of the front panel 11b.
  • the depth of the recession is set so as to match the dimensions of the thickness of the Coanda blade 32, forming the housing portion 130 accommodating the Coanda blade 32.
  • the surface of the housing portion 130 also is a gently arcing curved surface.
  • the outlet 15 is formed in the lower portion of the body casing 11, and is a rectangular opening, the length to the lateral direction (the direction orthogonal to the page of FIG. 1 ).
  • the lower end of the outlet 15 is in contact with the front edge of the lower horizontal plate 11d, a virtual surface connecting the lower end and the upper end of the outlet 15 inclining forward and upward.
  • the scroll 17 is a partition wall curved so as to oppose the indoor fan 14, and is a part of the bottom frame 16.
  • the termination F of the scroll 17 reaches the vicinity of the periphery of the outlet 15. Air passing through the outlet passage 18 advances following the scroll 17, and is delivered in the tangential direction of the termination F of the scroll 17. Accordingly, if the wind direction adjusting blade 31 is not over the outlet 15, the wind direction of conditioned air blown out from the outlet 15 is substantially the direction along the tangential line L0 of the termination F of the scroll 17.
  • the perpendicular wind direction adjusting blade 20 as shown in FIG. 1 and FIG. 2 , has a plurality of blade pieces 201 and a connecting rod 203 connecting the plurality of blade pieces 201. Further, the perpendicular wind direction adjusting blade 20 is arranged, in the outlet passage 18, closer to the indoor fan 14 than is the wind direction adjusting blade 31.
  • the plurality of blade pieces 201 due to the horizontal reciprocal movement of the connecting rod 203 following the longitudinal direction of the outlet 15, swing left-right centered on a vertical condition in relation to that longitudinal direction. Note that the connecting rod 203 is driven in the horizontal reciprocal movement by a motor (not shown in the drawing).
  • the wind direction adjusting blade 31 has an area of an extent that enables blocking of the outlet 15.
  • the outside surface 31a finishes as a convex, gently arcing curved surface on the outside, as if extending along the curved surface of the front panel 11b.
  • the inner surface 31b of the wind direction adjusting blade 31 (refer FIG. 2 ) also forms an arcing curved surface substantially parallel to the outside.
  • the wind direction adjusting blade 31 has a rotating shaft 311 to the lower end portion thereof.
  • the rotating shaft 311 links to the rotating shaft of a stepping motor (not shown in the drawing) secured to the body casing 11 in the vicinity of the lower end of the outlet 15.
  • the upper end of the wind direction adjusting blade 31 recedes from the upper end side of the outlet 15, opening the outlet 15, while by turning of the rotating shaft 311 in the clockwise direction in the front view of FIG. 1 , the upper end of the wind direction adjusting blade 31 moves closer to the upper end side of the outlet 15, closing the outlet 15.
  • conditioned air blown out from the outlet 15 flows substantially along the inner surface 31b of the wind direction adjusting blade 31. That is, the wind direction of the conditioned air blown out substantially following the tangential direction of the termination F of the scroll 17, is changed to be somewhat upwardly directed by the wind direction adjusting blade 31.
  • the Coanda blade 32 is housed in the housing portion 130 during air conditioning operations shut down or during operation of normal blowout mode described subsequently.
  • the Coanda blade 32 moves away from the housing portion 130 by turning.
  • a rotating shaft 321 of the Coanda blade 32 is provided in the vicinity of the lower end of the housing portion 130, positioned to the inner side of the body casing 11 (a position above the upper wall of the outlet passage 18), the lower end portion of the Coanda blade 32 and the rotating shaft 321 being connected maintaining a predetermined distance.
  • the height position of the lower end of the Coanda blade 32 turns so as to lower.
  • the inclination when the Coanda blade 32 turns and opens is more gradual than the inclination of the indoor unit front surface portion.
  • the housing portion 130 is provided outside of the wind blast passage, and when housed, the entirety of the Coanda blade 32 is accommodated to the outside of the wind blast passage.
  • it is also suitable for only part of the Coanda blade 32 to be housed outside the wind blast passage, and for the remainder to be accommodated within the wind blast passage (for example the upper wall portion of the wind blast route).
  • the rotating shaft 321 turns in the anti-clockwise direction in the front view of FIG. 1 , the upper end and the lower end of the Coanda blade 32 move away from the housing portion 130, drawing an arc, at which time, the minimum distance between the upper end and the housing portion 130 of the indoor unit front surface portion, above the outlet 15 is greater than the minimum distance between the lower end and the housing portion 130. That is, the Coanda blade 32 is controlled to a posture moving away from the indoor unit front surface portion in accordance with forward movement. As the rotating shaft 321 turns in the clockwise direction in the front view of FIG. 1 , the Coanda blade 32 approaches the housing portion 130 and finally is accommodated therein.
  • the postures for the conditions of operation of the Coanda blade 32 are the state of the Coanda blade 32 being accommodated in the housing portion 130, rotated, inclining the posture forward and upward, further rotated, the posture becoming largely horizontal, and further rotated, inclining the posture forward and downward.
  • the outside surface 32a of the Coanda blade 32 finishes as a convex, gently arcing curved surface on the outside, as if extending the gently arcing curved surface of the front panel 11b. Further, the inner surface 32b of the Coanda blade 32 finishes as an arc curved surface following the surface of the housing portion 130.
  • the dimensions in the longitudinal direction of the Coanda blade 32 are set so as to be greater than the dimensions in the longitudinal direction of the wind direction adjusting blade 31. The reason is that all conditioned air having the wind direction adjusted by the wind direction adjusting blade 31 is received at the Coanda blade 32, the purpose being to prevent conditioned air short-circuiting from the side direction of the Coanda blade 32.
  • the air conditioner indoor unit has, as a means for controlling the directionality of conditioned air, a normal blowout mode that causes rotation of only the wind direction adjusting blade 31, adjusting the direction of conditioned air, and Coanda airflow effect using mode, that causes rotation of the wind direction adjusting blade 31 and the Coanda blade 32, with conditioned air, due to the Coanda effect, becoming Coanda airflow following the outside surface 32a of the Coanda blade 32.
  • the wind direction adjusting blade 31 and the Coanda blade 32 change posture for each blowout direction of air in each of the above modes, and these postures will be described with reference to the drawings. Note that selection of the blowout direction is performed by a user via for example, a remote control. Further, it is possible to control the mode change or blowout direction so as to change automatically.
  • the normal blowout mode is a mode that causes rotation of the wind direction adjusting blade 31 only, for adjusting the direction of conditioned air, and includes "normal forward blow” and "normal forward-downward blow”.
  • FIG. 3A is a side view of the wind direction adjusting blade 31 and the Coanda blade 32 during normal forward blow of conditioned air.
  • the control portion 40 causes rotation of the wind direction adjusting blade 31 until the inner surface 31b of the wind direction adjusting blade 31 reaches a position roughly horizontal.
  • the wind direction adjusting blade 31 is caused to rotate such that the tangential line for the forward end E1 of the inner surface 31b becomes roughly horizontal. Resultantly, the conditioned air is in the forward blow condition.
  • FIG. 3B is a side view of the wind direction adjusting blade 31 and the Coanda blade 32 during normal forward-downward blow of conditioned air.
  • the user wants the blowout direction facing further downward than "normal forward blow”, the user selects "normal forward-downward blow”.
  • control portion 40 causes rotation of the wind direction adjusting blade 31 until the tangential line for the forward end E1 of the inner surface 31b of the wind direction adjusting blade 31 becomes more forward falling than horizontal. Resultantly, the conditioned air is in the forward-downward blow condition.
  • FIG. 6A is a side view of a space for installation of the air conditioner indoor unit indicating the wind direction of conditioned air from the upward-downward swing of the wind direction adjusting blade 31.
  • Wind direction adjustment as shown in FIG. 6A is what is known as wind direction adjustment through auto louver function, employing means for repeating an operation to apply wind and an operation to not apply wind to a human 400.
  • Coanda (effect) is a phenomena in which if there is a wall near a flow of gas or liquid, even if the direction of the flow and the direction of the wall are different, the flow direction comes to follow the wall surface (" Ho ⁇ soku no Jiten (Legal Dictionary)", Asakura Publishing Co., Ltd. ).
  • the Coanda effect using mode includes "Coanda airflow forward blow” and “Coanda airflow ceiling blow”, using the Coanda effect.
  • FIG. 4A is a conceptual diagram showing the direction of conditioned air and the direction of the Coanda airflow.
  • generating Coanda effect at the outside surface 32a side of the Coanda blade 32 requires that the inclination of the direction (D1) of conditioned air as changed by the wind direction adjusting blade 31 becomes close to the posture (inclination) of the Coanda blade 32, and if both those blades are too removed the Coanda effect does not arise.
  • the Coanda blade 32 be located forward of (downstream side of blowout) and above the wind direction adjusting blade 31.
  • Fig. 4B is a conceptual diagram showing an example of the opening angles of the wind direction adjusting blade 31 and the Coanda blade 32.
  • the wind direction adjusting blade 31 and the Coanda blade 32 take a posture that fulfills the condition in which the interior angle formed by the tangential line of termination F of the scroll 17 and the Coanda blade 32, is greater than the interior angle formed by the tangential line of termination F of the scroll 17 and the wind direction adjusting blade 31.
  • FIG. 5A comparing, during Coanda airflow forward blow, the interior angle R2 formed by the tangential line L0 of the termination F of the scroll 17 and the Coanda blade 32, and the interior angle R1 formed by the tangential line L0 of the termination F of the scroll 17 and the wind direction adjusting blade 31; and FIG. 5B comparing, during Coanda airflow ceiling blow, the interior angle R2 formed by the tangential line L0 of the termination F of the scroll 17 and the Coanda blade 32, and the interior angle R1 formed by the tangential line L0 of the termination F of the scroll 17 and the wind direction adjusting blade 31.
  • FIG. 3C is a side view of the wind direction adjusting blade 31 and the Coanda blade 32 during Coanda airflow forward blow.
  • the control portion 40 rotates the wind direction adjusting blade 31 until the tangential line L1 for the forward end E1 of the inner surface 31b of the wind direction adjusting blade 31 becomes more forward falling than horizontal.
  • the control portion 40 rotates the Coanda blade 32 until the outside surface 32a of the Coanda blade 32 reaches a position roughly horizontal.
  • the Coanda blade 32 is caused to rotate such that the tangential line L2 for the forward end E2 of the outside surface 32a becomes roughly horizontal. That is, as shown in FIG. 5A , the interior angle R2 formed by the tangential line L0 and the tangential line L2 is greater than the interior angle R1 formed between the tangential line L0 and the tangential line L1.
  • the conditioned air adjusted to forward-downward blow at the wind direction adjusting blade 31, becomes, due to the Coanda effect, flow adhering to the outside surface 32a of the Coanda blade 32, changing to a Coanda airflow following the outside surface 32a.
  • the Coanda blade 32 separates from the indoor unit front surface portion, the inclination becoming gradual, and the conditioned air becomes susceptible to Coanda effect further forward of the front panel 11b. Resultantly, though the conditioned air with wind direction adjusted at the wind direction adjusting blade 31 is forward-downward blow, this becomes, due to the Coanda effect, horizontally blown air.
  • pressure loss through ventilation resistance of the wind direction adjusting blade 31 is controlled while changing the wind direction.
  • FIG. 3D is a side view of the wind direction adjusting blade 31 and the Coanda blade 32 during Coanda airflow ceiling blow.
  • the control portion 40 rotates the wind direction adjusting blade 31 until the tangential line L1 for the forward end E1 of the inner surface 31b of the wind direction adjusting blade 31 is horizontal.
  • the control portion 40 rotates the Coanda blade 32 until the tangential line L2 for the forward end E2 of the outside surface 32a is directed forward and upward. That is, as shown in FIG. 5B , the interior angle R2 formed by the tangential line L0 and the tangential line L2 becomes greater than the interior angle R1 formed by the tangential line L0 and the tangential line L1.
  • the conditioned air adjusted to horizontal blow at the wind direction adjusting blade 31, due to the Coanda effect flows adhering to the outside surface 32a of the Coanda blade 32, changing to this Coanda airflow following the outside surface 32a.
  • the Coanda blade 32 separates from the indoor unit front surface portion, the inclination becoming gradual, and the conditioned air becomes susceptible to Coanda effect further forward of the front panel 11b. Resultantly, though the conditioned air with wind direction adjusted at the wind direction adjusting blade 31 is forward blow, this becomes, due to the Coanda effect, upwardly directed air.
  • the dimensions in the longitudinal direction of the Coanda blade 32 are greater than the dimensions in the longitudinal direction of the wind direction adjusting blade 31.
  • all conditioned air having the wind direction adjusted by the wind direction adjusting blade 31 can be received at the Coanda blade 32, furnishing the effect of preventing conditioned air short-circuiting from the side direction of the Coanda blade 32.
  • FIG. 6B is a side view of the air conditioner indoor unit installation space showing the wind direction of conditioned air when the wind direction adjusting blade 31 is downwardly directed.
  • FIG. 6C is a side view of the air conditioner indoor unit installation space showing the wind direction of the Coanda airflow when the posture of the Coanda blade 32 is the ceiling blow posture.
  • wind directed to the human 400 as in FIG. 6B changes to an upwardly directed Coanda airflow as in FIG. 6C , through usage of the Coanda effect, thereafter, by performing the contrary operation, an unexpected breeze can be created and expelled, as if applied suddenly to the human 400.
  • the wind direction adjusting blade 31 directs conditioned air in the direction in which an occupant is, in the case of having the Coanda blade 32 in an irregular cycle, move so as to span the boundary area between the region in which Coanda effect is generated and the region in which Coanda effect is not generated, Coanda airflow is repeatedly generated and stopped, producing wind that is applied suddenly to the occupant.
  • Fluctuating airflow is airflow generated by irregularly fluctuating the wind direction of conditioned air, and differs to automatic wind direction as described in (3-1-3) on the point that wind direction is irregularly fluctuated.
  • FIG. 7 is a flowchart showing operations of the wind direction adjusting blade 31 and the Coanda blade 32 during fluctuating airflow A control.
  • the wind direction adjusting blade 31 swings between an upper limit position and a lower limit position, interspersed by an operation of waiting in an intermediate position.
  • the control portion 40 irregularly changes the times in which the wind direction adjusting blade 31 waits in the intermediate position (the intermediate position waiting time), so that by irregularly interchanging the combination of wind approaching the occupant and wind receding from the occupant, the occupant is provided with a variety of winds.
  • fluctuating airflow control includes a first pattern in which, while the Coanda blade 32 swings between the upper limit position and the lower limit position, the wind direction adjusting blade 31 swings between the upper limit position and the intermediate position, and a second pattern in which, while the Coanda blade 32 waits in the upper limit position, the wind direction adjusting blade 31 swings between the intermediate position and the lower limit position.
  • the operation of the Coanda blade 32 swinging from the upper limit position toward the lower limit position synchronizes with the timing of the wind direction adjusting blade 31 swinging from the intermediate position toward the upper limit position. Further, the operation of the Coanda blade 32 swinging from the lower limit position toward the upper limit position synchronizes with the timing of the wind direction adjusting blade 31 swinging from the upper limit position toward the intermediate position.
  • the Coanda blade 32 is controlled so as to be in the upper limit position so Coanda airflow is not generated. Accordingly, by changing the intermediate position waiting time of the wind direction adjusting blade 31 irregularly, the times during which Coanda airflow is not generated change irregularly, interspersed irregularly with intervals of wind unexpectedly blowing, enabling the occupant to be provided with a variety of winds.
  • the time of the wind direction adjusting blade 31 being in the intermediate position, and the time of the Coanda blade 32 being in the upper limit position are counted as waiting time.
  • control portion 40 can cause the respective times for the wind direction adjusting blade 31 waiting in the upper limit position and waiting in the lower limit position to change irregularly, and cause the times at which the Coanda blade 32 waits in the lower limit position to change irregularly.
  • 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 fluctuating airflow B control.
  • the operations of the wind direction adjusting blade 31 and the Coanda blade 32 are the same as during fluctuating airflow A control, however the difference in relation to fluctuating airflow A control lies in the point that the rotation speed of the indoor fan 14 is caused to change in conformance with the operations of the wind direction adjusting blade 31 and the Coanda blade 32.
  • the fan rotation speed of the indoor fan 14 rises to a predetermined value.
  • Predetermined value is the fan rotation speed for maintaining minimum air quantity by which wind peeling off from the Coanda blade 32 can reach the occupant.
  • FIG. 8 when the wind direction mode switches from fixed wind direction control to fluctuating airflow B control, once, the wind direction adjusting blade 31 moves to the intermediate position and waits. Simultaneously, the Coanda blade 32 moves to the upper limit position and waits.
  • the control portion 40 calculates the waiting time from the starting point of, the time when the wind direction adjusting blade 31 reaches the intermediate position and the time when the Coanda blade 32 reaches the upper limit position.
  • the Coanda blade 32 in synchronicity, commences transition to the lower limit position.
  • the wind direction adjusting blade 31 having reached the upper limit position also waits there only a certain time, and in synchronicity with the Coanda blade 32 starting the transition to the upper limit position, commences transition toward the intermediate position.
  • the wind direction adjusting blade 31 having reached the intermediate position waits there, and during this time, the Coanda blade 32 reaches the upper limit position.
  • the control portion 40 calculates the waiting time from the starting point of, the time when the wind direction adjusting blade 31 reaches the intermediate position and the time when the Coanda blade 32 reaches the upper limit position.
  • the wind direction adjusting blade 31 having already reached the upper limit position, waits there a certain time only, and in synchronicity with the Coanda blade 32 commencing transition to the upper limit position, commences transition toward the intermediate position. Thereafter operations conform with the wind direction patterns having differing waiting times as set in advance.
  • control portion 40 can cause the respective times for the wind direction adjusting blade 31 waiting in the upper limit position and waiting in the lower limit position to change irregularly, and cause the times at which the Coanda blade 32 waits in the lower limit position to change irregularly.
  • the fan rotation speed of the indoor fan 14 repeats irregularly rising or lowering, according to a pattern of varied fluctuations set in advance.
  • a restriction is implemented causing the fan rotation speed to fluctuate irregularly in a range greater than a predetermined value. Then, the Coanda blade 32 commences transition from the lower limit position to the upper limit position, and at the point in time when the Coanda blade 32 reaches the upper limit position, the restriction is stopped and the fan rotation speed is caused to fluctuate irregularly.
  • the control implemented is such that the fan rotation speed is greater than the predetermined value.
  • the control portion 40 controls the operation of the Coanda blade, implementing modes including a Coanda generating condition that generates Coanda airflow and a Coanda airflow not generated condition that does not generate Coanda airflow, thus during fluctuating airflow control, the flow of wind is varied as Coanda airflow is generated suddenly, enabling conditioned air closer to natural wind to be provided to the occupant.
  • control portion 40 causes the air quantity of conditioned air to change during fluctuating airflow control, the change in air quantity in addition to wind direction produces conditioned air still closer to natural wind, enabling a more comfortable air-conditioned space to be provided to the occupant.
  • control portion 40 changes the air quantity of conditioned air to a predetermined value.
  • conditioned air during the moment of the Coanda effect being stopped definitively reaches the occupant, providing an "unexpected breeze".
  • FIG. 9 is a flowchart showing the operations of the wind direction adjusting blade 31 and the Coanda blade 32 during fluctuating airflow control for a first modification.
  • the fluctuating airflow control in the first modification is characterized by mixing up time periods implementing A mode, in which the wind direction adjusting blade 31 and the Coanda blade 32 are caused to swing generating fluctuating airflow, with time periods implementing B mode in which only the wind direction adjusting blade 31 is caused to swing, generating fluctuating airflow.
  • a mode is the same as fluctuating airflow A control for the above described embodiment, in which the wind direction adjusting blade 31 swings between an upper limit position and a lower limit position, interspersed by an operation for waiting in an intermediate position.
  • the control portion 40 irregularly changes the times in which the wind direction adjusting blade 31 waits in the intermediate position, so that by irregularly interchanging the combination of wind approaching the occupant and wind receding from the occupant, the occupant is provided with a variety of winds.
  • the Coanda blade 32 swings between an upper limit position and a lower limit position.
  • the control portion 40 irregularly changes the times in which the Coanda blade 32 waits in the upper limit position, such that the times of not generating Coanda airflow change irregularly, interchanged irregularly with intervals of wind unexpectedly blowing to the occupant, thus enabling the occupant to be provided with a variety of winds.
  • the Coanda blade 32 transitions to a fully closed position, such that, regardless of the wind direction adjusting blade 31 being in the upper or lower limit position, Coanda airflow is continually not generated. Nevertheless, the wind direction adjusting blade 31 swings between the upper limit position and the lower limit position interspersed with the operation for waiting in the intermediate position. During this time, the control portion 40 irregularly changes the periods during which the wind direction adjusting blade 31 waits in the intermediate position, so that by irregularly interchanging the combination of wind approaching the occupant and wind receding from the occupant, the occupant is provided with a variety of winds.
  • mixing A mode and B mode creates mutual repetition between the fluctuating airflow with "unexpected breeze” and fluctuating airflow without “unexpected breeze”, realizing a variety of winds.
  • FIG. 10 is a flowchart showing the operations of the wind direction adjusting blade 31 and the Coanda blade 32 during fluctuating airflow control for a second modification.
  • fluctuating airflow control for the second modification is characterized by mixing in, in addition to the A mode and the B mode of fluctuating airflow control according to the first modification, a C mode that causes swing of the Coanda blade 32 only, generating fluctuating airflow.
  • the present invention is capable of providing conditioned air closer to natural wind to an occupant as described above, and can not be applied only to a wall-mounted type air conditioner indoor unit.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Air Conditioning Control Device (AREA)
  • Air-Flow Control Members (AREA)
EP13837777.5A 2012-09-13 2013-08-29 Air-conditioning indoor unit Active EP2918930B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2012201807A JP5408318B1 (ja) 2012-09-13 2012-09-13 空調室内機
PCT/JP2013/073149 WO2014042012A1 (ja) 2012-09-13 2013-08-29 空調室内機

Publications (3)

Publication Number Publication Date
EP2918930A1 EP2918930A1 (en) 2015-09-16
EP2918930A4 EP2918930A4 (en) 2016-10-26
EP2918930B1 true EP2918930B1 (en) 2020-06-24

Family

ID=50202631

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13837777.5A Active EP2918930B1 (en) 2012-09-13 2013-08-29 Air-conditioning indoor unit

Country Status (5)

Country Link
EP (1) EP2918930B1 (zh)
JP (1) JP5408318B1 (zh)
CN (1) CN104620058B (zh)
ES (1) ES2807904T3 (zh)
WO (1) WO2014042012A1 (zh)

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JP6065076B1 (ja) * 2015-09-10 2017-01-25 ダイキン工業株式会社 壁掛け式の空調室内機
JP6869109B2 (ja) * 2017-05-31 2021-05-12 ダイキン インダストリーズ （タイランド） リミテッドＤａｉｋｉｎ Ｉｎｄｕｓｔｒｉｅｓ （Ｔｈａｉｌａｎｄ） Ｌｔｄ． 空気調和機
JP6897735B2 (ja) * 2019-09-17 2021-07-07 ダイキン工業株式会社 空調室内機および空気調和機
WO2021054287A1 (ja) * 2019-09-17 2021-03-25 ダイキン工業株式会社 空調室内機
GB2588220B (en) 2019-10-17 2022-08-03 Dyson Technology Ltd A fan assembly
KR102517611B1 (ko) * 2020-11-13 2023-04-03 엘지전자 주식회사 공기조화기
CN114110950B (zh) * 2021-11-29 2023-04-07 海信空调有限公司 空调器及其控制方法和装置和存储介质

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JP3064148B2 (ja) * 1993-03-11 2000-07-12 三菱重工業株式会社 空気調和機における吹出風の制御方法
JP3352428B2 (ja) 1999-08-04 2002-12-03 松下電器産業株式会社 空気調和機の風向制御方法
JP4017483B2 (ja) * 2002-09-25 2007-12-05 シャープ株式会社 空気調和機
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KR20120079119A (ko) * 2009-09-28 2012-07-11 다이킨 고교 가부시키가이샤 제어 장치
JP5403125B2 (ja) * 2011-10-31 2014-01-29 ダイキン工業株式会社 空調室内機

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Also Published As

Publication number Publication date
WO2014042012A1 (ja) 2014-03-20
CN104620058B (zh) 2016-06-15
JP5408318B1 (ja) 2014-02-05
JP2014055746A (ja) 2014-03-27
ES2807904T3 (es) 2021-02-24
EP2918930A1 (en) 2015-09-16
CN104620058A (zh) 2015-05-13
EP2918930A4 (en) 2016-10-26

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