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US20200224889A1 - Indoor unit of air conditioner - Google Patents

Indoor unit of air conditioner Download PDF

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Publication number
US20200224889A1
US20200224889A1 US16/321,599 US201716321599A US2020224889A1 US 20200224889 A1 US20200224889 A1 US 20200224889A1 US 201716321599 A US201716321599 A US 201716321599A US 2020224889 A1 US2020224889 A1 US 2020224889A1
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US
United States
Prior art keywords
angle
louver
indoor unit
blow
air conditioner
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.)
Abandoned
Application number
US16/321,599
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English (en)
Inventor
Toshiki MOCHIZUKI
Naoyuki FUSHIMI
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.)
Hitachi Johnson Controls Air Conditioning Inc
Original Assignee
Hitachi Johnson Controls Air Conditioning Inc
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 Hitachi Johnson Controls Air Conditioning Inc filed Critical Hitachi Johnson Controls Air Conditioning Inc
Assigned to HITACHI-JOHNSON CONTROLS AIR CONDITIONING, INC. reassignment HITACHI-JOHNSON CONTROLS AIR CONDITIONING, INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: FUSHIMI, NAOYUKI, Mochizuki, Toshiki
Publication of US20200224889A1 publication Critical patent/US20200224889A1/en
Abandoned legal-status Critical Current

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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
    • 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
    • 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
    • F24F1/0014—Indoor units, e.g. fan coil units characterised by air outlets having two or more outlet openings
    • 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
    • F24F1/0047—Indoor units, e.g. fan coil units characterised by mounting arrangements mounted in the ceiling or at the ceiling
    • 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
    • F24F11/50—Control or safety arrangements characterised by user interfaces or communication
    • F24F11/56—Remote control
    • 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
    • F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
    • 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
    • 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

Definitions

  • the present invention relates to an indoor unit of an air conditioner, and specifically relates to an indoor unit having multiple blow ports and including louvers each configured to control a wind direction for the blow ports.
  • An indoor unit of an air conditioner including multiple blow ports has been known as a typical air conditioner.
  • the blowing direction of heated air blown from the multiple blow ports is, in heating operation, differentiated for improving unevenness in the inner temperature of a room targeted for heating, and in this manner, air stirring movement is performed.
  • an indoor unit configured such that the louver angles of a part of multiple blow ports are set to an angle not used in normal operation to narrow an opening area and a wind volume is concentrated on the remaining blow ports to increase a wind velocity.
  • Patent Document 1 The typical technique of this type includes a technique described in Japanese Patent No. 6135734 (Patent Document 1).
  • Patent Document 1 in a case where an indoor load is high in heating operation, louvers are controlled to an air flow block position at which the louvers are rotated to an angle more greater than that at the maximum downward blowing position such that the opening areas of a part of blow ports of an indoor unit are decreased. Louvers of the remaining blow ports are controlled to a horizontal blowing position.
  • the air flow block position is a position at which the louver is further opened from the normally-used maximum angle (downward blowing) and a blade of the louver enters deeper into the blow port. With this configuration, an air flow path is closed by the blade of the louver. The volume of blown wind is significantly decreased at the blow ports at which the louvers are at the air flow block position, and therefore, a wind velocity at the remaining blow ports is increased. Thus, blown air can reach a farther spot than that of a normal case.
  • louvers of a part of blow ports may be set to a fully-closed position (a position upon stop of operation) to increase the wind velocity at the remaining blow ports.
  • a fully-closed position a position upon stop of operation
  • the louvers bend due to a wind pressure when the louvers are at the fully-closed position.
  • An object of the present invention is to provide an indoor unit of an air conditioner configured so that high-speed blowing from a part of multiple blow ports is allowed and bending of a louver provided at each blow port can be reduced.
  • the present invention is an indoor unit of an air conditioner including multiple blow ports and multiple louvers each provided at the blow ports and configured to adjust a blowing direction.
  • Each louver is, upon stop of the indoor unit, rotated in the direction of closing the blow port, the angle of the each louver rotated in the direction of closing the blow port upon stop of the indoor unit being a fully-closed angle.
  • a remote controller configured to set operation of each louver upon operation of the indoor unit is provided.
  • the louver angles of a part of the multiple blow ports are, under a preset predetermined operation condition, set to a third angle greater than the fully-closed angle as the louver angle upon stop of the indoor unit and smaller than the first angle, and the louvers of the other blow ports perform louver operation settable from the remote controller.
  • Another feature of the present invention is an indoor unit of an air conditioner including multiple blow ports and multiple louvers each provided at the blow ports and configured to adjust a blowing direction.
  • Each louver is, upon stop of the indoor unit, rotated in the direction of closing the blow port, the angle of the each louver rotated in the direction of closing the blow port upon stop of the indoor unit being a fully-closed angle.
  • the function of automatically swinging each louver upon operation of the indoor unit is provided.
  • the louver angles of a part of the multiple blow ports are, under a preset predetermined operation condition, set to a third angle greater than the fully-closed angle as the louver angle upon stop of the indoor unit and smaller than the first angle, and the louvers of the other blow ports are set to auto swing or an optional angle.
  • the indoor unit of the air conditioner configured so that high-speed blowing from a part of the multiple blow ports is allowed and bending of the louver provided at each blow port can be reduced can be provided.
  • FIG. 1 is a perspective view of a first embodiment of an indoor unit of an air conditioner of the present invention.
  • FIG. 2 is a longitudinal sectional view of the indoor unit illustrated in FIG. 1 .
  • FIG. 3 is a sectional view of a main portion of one blow port illustrated in FIGS. 1 and 2 in a fully-closed state of a louver.
  • FIG. 4 is a sectional view of a main portion of one blow port illustrated in FIGS. 1 and 2 , FIG. 4 being a view of the minimum angle (a first angle) and the maximum angle (a second angle) of the louver during operation of the indoor unit.
  • FIG. 5 is a sectional view of a main portion of one blow port illustrated in FIGS. 1 and 2 , FIG. 5 being a view for describing a third louver angle in the first embodiment.
  • FIG. 6 is a view for describing action when the louver illustrated in FIG. 5 is in a third angle state.
  • FIG. 7 is a sectional view of a main portion for describing a typical indoor unit configured such that a louver has been rotated to an air flow block position.
  • FIGS. 1 to 7 A first embodiment of an indoor unit of an air conditioner of the present invention will be described with reference to FIGS. 1 to 7 .
  • FIG. 1 is a perspective view of the indoor unit of the air conditioner of the first embodiment.
  • the indoor unit 1 of the air conditioner is configured such that the indoor unit 1 and a not-shown outdoor unit are connected to each other via a refrigerant pipe to form a refrigerant circuit and refrigerant circulates to form a refrigeration cycle.
  • the indoor unit 1 is a so-called ceiling cassette type, and includes, for example, a housing 2 embedded in, e.g., a ceiling of a room and a decorative panel 3 provided to close a lower opening of the housing 2 .
  • the decorative panel 3 includes a suction port 4 provided at the center to suck indoor air, and air blow ports 5 provided at four spots to surround the suction port 4 .
  • a suction grille 6 is provided at the suction port 4 , and a louver 7 configured to adjust the blow direction of air blown from each blow port 5 is rotatably provided at the blow port 5 .
  • the louvers 7 illustrated in FIG. 1 indicate a state in which the indoor unit 1 is stopped and the louvers 7 are fully closed, i.e., a state in which a louver angle is a fully-closed angle (0 degree).
  • a fully-closed state includes not only a state in which the blow port 5 is fully closed, but also a state in which the louver is substantially horizontal to substantially close the blow port and an opening area is minimum.
  • FIG. 2 is a longitudinal sectional view of the indoor unit 1 illustrated in FIG. 1 .
  • a motor 8 and a centrifugal fan 9 connected to a rotary shaft of the motor 8 are placed at a center portion in the housing 2 .
  • the motor 8 is fixed to the center of a top plate of the housing 2 .
  • a heat exchanger 10 in a hollow square shape as viewed in plane is placed at the periphery of the centrifugal fan 9 to surround the centrifugal fan 9 .
  • the heat exchanger 10 is a cross fin type fin-and-tube heat exchanger.
  • a drain pan 11 configured to receive dew condensation water generated at the heat exchanger 10 is placed below the heat exchanger 10 .
  • a heat insulating material made of foamed styrol is used as the drain pan 11 .
  • a water receiving groove is formed along a lower end of the heat exchanger 10 , and a lower end portion of the heat exchanger 10 enters the water receiving groove.
  • the blow port 5 is formed integrally with the heat insulating material forming the drain pan 11 , or is formed from a separate heat insulating material.
  • the decorative panel 3 is formed in a square shape slightly larger than the housing 2 . Moreover, the decorative panel 3 is arranged along the ceiling 20 to cover a lower surface of the housing 2 , and is exposed to an indoor space.
  • the louver 7 provided at the blow port 5 of the decorative panel 3 is at a fully-closed position (the louver angle is 0 degree) in FIG. 2 , and indicates a state in which operation of the indoor unit 1 is stopped.
  • the louver 7 is rotated to open the blow port 5 , and then, is fixed at a predetermined angle set from a remote controller (not shown) by a user, such as downward blowing or lateral blowing.
  • a remote controller not shown
  • the louver 7 performs automatic swing operation within a range from the minimum angle to the maximum angle.
  • the indoor air is sucked into a suction portion 12 of the centrifugal fan 9 through the suction port 4 and the suction grille 6 , and then, is discharged in an outer peripheral direction from a discharge portion 13 of the centrifugal fan 9 .
  • the air discharged from the centrifugal fan 9 is cooled or heated through the heat exchanger 10 .
  • the resultant conditioned air is blown into the room through the blow ports 5 formed at the decorative panel 3 by way of a wind path 14 formed by an outer peripheral surface of the heat exchanger 10 and an inner peripheral surface of the housing 2 .
  • the louver 7 when the louver 7 is set to an angle for downward blowing, the conditioned air is blown downward.
  • the louver 7 is set to an angle for lateral blowing, the conditioned air is blown in a lateral direction (the horizontal direction).
  • the louver 7 performs the automatic swing operation within the range from the minimum angle to the maximum angle.
  • the conditioned air is blown within a range from a direction close to the horizontal direction to a direction close to the vertical direction according to motion of the louver 7 .
  • 15 is a bell mouth arranged below the centrifugal fan 9 and having, at a center portion, an opening whose diameter gradually decreases while standing toward the suction portion 12 of the centrifugal fan 9 .
  • the bell mouth 15 is configured to guide air sucked through the suction port 4 to the centrifugal fan 9 .
  • the bell mouth 15 is configured to divide, together with the drain pan 11 , an internal space of the housing 2 into a suction side and a discharge side of the centrifugal fan 9 .
  • 16 is an electric component box configured to house, e.g., a control board for controlling operation of the indoor unit 1 , and the electric component box 16 is placed on a lower surface of the bell mouth 15 .
  • 17 is a suction filter placed above the suction grille 6 .
  • FIG. 3 is a sectional view of a main portion of one blow port illustrated in FIGS. 1 and 2 when the louver is in a fully-closed angle state.
  • the louver 7 is brought into the fully-closed angle state illustrated in FIG. 3 to prevent a foreign substance from entering the indoor unit during stop of the indoor unit 1 and improve designability upon stop of the indoor unit.
  • the fully-closed angle (0 degree) of the louver 7 is not generally a state in which the blow port 5 is fully closed, but a state in which a slight clearance is formed between each of right and left ends of the louver 7 and a wall surface of the decorative panel 3 forming the blow ports 5 . It is configured such that the louver 7 and a wall surface of the blow port 5 do not contact each other.
  • 3 a is a heat insulating material forming the blow port 5 , such as foamed styrol.
  • the louver 7 is formed in an elongated plate shape or a blade shape extending from one end to the other end of the blow port 5 in a longitudinal direction thereof, and is fixed to a center shaft 18 extending in a longitudinal direction of the louver 7 via an attachment member 19 .
  • the center shaft 18 is rotatably supported by support members (not shown) arranged on both end sides of the center shaft 18 , and rotation of the center shaft 18 is controlled by, e.g., a stepping motor.
  • FIG. 4 is a sectional view of a main portion of one blow port illustrated in FIGS. 1 and 2 , FIG. 4 being a view of the minimum and maximum angles of the louver during operation of the indoor unit. That is, FIG. 4 illustrates an operation range of the louver 7 in a state in which the indoor unit 1 is in operation.
  • a louver 7 a indicated by a solid line indicates the minimum angle (a first angle) of the louver 7 settable by the user by means of the remote controller (not shown), and a louver 7 b indicated by a chain line indicates the maximum angle (a second angle) of the louver 7 settable by the user by means of the remote controller.
  • louver 7 When the louver 7 is set to a position 7 a at the minimum angle (the first angle), lateral blowing operation for blowing the conditioned air substantially in the horizontal direction from the blow port 5 is performed. On the other hand, when the louver 7 is set to a position 7 b at the maximum angle (the second angle), downward blowing operation for blowing the conditioned air substantially in the vertical direction from the blow port 5 is performed.
  • the minimum angle (the first angle) is 28 degrees
  • the maximum angle (the second angle) is 64 degrees, for example.
  • the minimum angle (the first angle) may be set to any value within a range of about 27 to 30 degrees, for example.
  • the maximum angle (the second angle) may be set to any value within a range of about 60 to 70 degrees, for example.
  • the angle of the louver 7 during operation of the indoor unit 1 is not only settable within the range between the minimum angle and the maximum angle from the remote controller, but also is settable from the remote controller at multiple steps in increments of several degrees between the minimum angle and the maximum angle. For example, when the minimum angle is taken as a first step and the maximum angle is taken as a seventh step, five steps (second to sixth steps) of the angle are settable between the first and seventh levels. Note that the angle of the louver 7 is not limited to the seven steps, and more or less steps may be provided. Alternatively, the louver angle may be steplessly settable to an optional angle.
  • the louver 7 repeats reciprocation operation for increasing the angle from the angle at the start of automatic swing setting such as the first step as the minimum angle to the seventh step as the maximum angle in the order of the second step, the third step, . . . and subsequently decreasing the angle to the first step as the minimum angle in the opposite direction in the order of the sixth step, the fifth step, . . . .
  • automatic swing is not limited to the reciprocation operation between the first to seventh steps, and for example, may be reciprocation operation between the third to seventh steps. Moreover, it may be configured such that upon automatic swing, the louver angle smoothly and steplessly changes.
  • FIG. 7 is a sectional view of a main portion for describing a typical indoor unit configured such that a louver 7 has been rotated to the air flow block position.
  • the air flow block position is a position at which the louvers 7 of a part of the blow ports 5 of the indoor unit 1 are, as shown in FIG. 7 , rotated to an angle more greater than that at the maximum downward blowing position (the position at the maximum angle indicated by the chain line in FIG. 4 ) such that the opening areas of the blow ports are decreased.
  • louvers of one or two of four blow ports 5 illustrated in FIG. 1 are set to the air flow block position, so that the wind velocity of air blown from the other blow ports 5 can be increased. Thus, the blown air can reach the floor surface.
  • the angle of the louver 7 is further increased as compared to the normally-used maximum angle.
  • the louver 7 enters deeper into the blow port 5 of the decorative panel 3 or the blow port 5 at a drain pan 11 (see FIG. 2 ) portion, and contacts the heat insulating material 3 a forming the blow port or the heat insulating material forming the blow port 5 at the drain pan 11 portion.
  • an internal structure of the blow port in the vicinity of the louver needs to be, for preventing contact of the louver 7 with the wall surface of the blow port 5 made of, e.g., the heat insulating material 3 a , changed such that the louver 7 does not contact the wall surface of the blow port 5 even when the louver 7 is rotated to the air flow block position.
  • louvers of a part of four blow ports 5 are set to the fully-closed position (the position upon stop of operation) as illustrated in FIG. 3 such that the wind velocity at the remaining blow ports is increased.
  • the louver 7 does not contact the wall surface of the blow port 5 made of, e.g., the heat insulating material, and therefore, the internal structure of the blow port 5 in the vicinity of the louver 7 does not need to be changed.
  • FIG. 5 is a sectional view of a main portion of one blow port illustrated in FIGS. 1 and 2 , FIG. 5 being a view for describing a third louver angle in the first embodiment.
  • FIG. 6 is a view for describing action in a state in which the louver illustrated in FIG. 5 is at the third angle.
  • the position 7 a of the louver 7 indicated by a chain line indicates a case where the louver 7 is set to the position at the minimum angle (the first angle)
  • the position 7 b of the louver 7 similarly indicated by a chain line indicates a case where the louver 7 is set to the position at the maximum angle (the second angle).
  • These positions 7 a , 7 b of the louver 7 are the angles of the louver 7 settable from the remote controller (not shown), and are functions generally provided to the typical indoor unit.
  • the function of automatically swinging the louver 7 within the range between the first angle position 7 a and the second angle position is also generally provided, and is settable from the remote controller.
  • the present embodiment is configured such that the angle of the louver 7 of each of four blow ports 5 illustrated in FIG. 1 is, as illustrated in FIG. 5 , settable to a position 7 c at the third angle greater than the fully-closed angle (a louver angle of 0 degree) as the louver angle upon stop of the indoor unit as illustrated in FIG. 3 and smaller than the first angle as the minimum opening degree of the louver 7 settable from the remote controller.
  • the position 7 c at the third angle of the louver 7 is not an angle settable by the user from the remote controller, but the angle position of the louver 7 automatically set from a control device included in, e.g., the indoor unit 1 of the air conditioner in the case of a preset predetermined operation condition such as the start of the heating operation.
  • the third angle is set to an angle, such as 14 degrees, greater than 0 degree as the fully-closed angle upon stop of the indoor unit and smaller than the first angle (28 degrees) as the minimum angle settable by the user from the remote controller.
  • the third angle is not limited to 14 degrees, and may be set to any value within a range of 5 to 25 degrees.
  • the third angle corresponds to an angle of a 0.5 step.
  • the angle of the 0.5 step is not a louver angle settable by the user from the remote controller, but is an angle automatically set from the control device provided at, e.g., the indoor unit 1 in the case of the predetermined operation condition.
  • each louver 7 is settable to the position 7 c at the third angle (the angle of the 0.5 step) as described above.
  • the louvers 7 of a part of blow port 5 among the louvers 7 of the multiple blow ports 5 are set to the position 7 c at the third angle.
  • the louvers 7 of a part of blow port 5 are set to the position at the third angle (the angle greater than the fully-closed angle of the louver and smaller than the first angle), so that a small clearance 21 can be formed between the wall surface of the blow port 5 and an end portion of the louver 7 as indicated by a hatched circle in FIG. 6 .
  • a small clearance 21 can be formed between the wall surface of the blow port 5 and an end portion of the louver 7 as indicated by a hatched circle in FIG. 6 .
  • an air flow can be blown from the clearance 21 , and therefore, bending of the louver due to the wind pressure can be reduced.
  • bending of the louver 7 can be suppressed small, and therefore, plastic deformation of the louver can be reduced even in a case where high-temperature air is blown into the room.
  • louvers 7 set to the third angle may be configured switchable sequentially in every predetermined time. Moreover, for the louvers 7 of the other blow ports 5 , louver operation settable from the remote controller is performed. That is, the other louvers 7 are set to automatic swing, or are set to an optional louver angle.
  • the preset predetermined operation condition of the air conditioner includes, for example, operation conditions as follows, and it may be configured such that the louvers of a part of blow port among the louvers of the multiple blow ports are automatically set to the third angle from the control device (not shown) provided at, e.g., the indoor unit 1 in a case where the following operation is performed:
  • the user cannot set an optional louver to the third angle from the remote controller, but the third angle is the angle automatically set from the control device of the air conditioner in a case where, e.g., the high-speed blowing setting has been made.
  • the angle of the louver 7 of any of the blow ports 5 is automatically set to the third angle position from the control device.
  • the opening area of the blow port 5 of the louver portion set to the third angle is small.
  • the volume of wind blown from the blow port 5 can be significantly reduced, and the velocity of wind blown from the other blow ports 5 can be sufficiently increased. Consequently, blown air can reach a position far enough such as the floor surface.
  • the small clearance 21 can be formed between the wall surface of the blow port 5 and the end portion of the louver 7 , and therefore, the air flow can be blown from the clearance 21 .
  • bending of the louver 7 due to the wind pressure can be reduced.
  • the rotation speed of the centrifugal fan 9 is increased, and therefore, bending of the louver 7 can be reduced even in a case where a great volume of high-temperature air is blown into the room. Consequently, plastic deformation of the louver 7 can be also reduced.
  • the angles of the louvers 7 of a part of the multiple blow ports 5 are not promptly controlled to the third angle, but may be first held at the fully-closed angle for such a predetermined time that plastic deformation of the louvers 7 does not occur and be subsequently controlled to the third angle after a lapse of the predetermined time.
  • the velocity of wind blown from the other blow ports 5 can be further increased as compared to the case of control to the third angle when the louvers 7 are held at the fully-closed angle, and therefore, a high-speed blowing effect can be further improved.
  • the louvers 7 controlled to the fully-closed angle are controlled to the third angle before plastic deformation of the louvers 7 occurs, and therefore, the effect of preventing plastic deformation of the louvers 7 can be also provided.
  • the minimum angle settable by the remote controller is taken as the first angle
  • the louver angle greater than the fully-closed angle as the louver angle upon stop of the indoor unit and smaller than the first angle is taken as the third angle.
  • the minimum angle of the louver upon automatic swing may be taken as the first angle
  • the louver angle greater than the fully-closed angle as the louver angle upon stop of the indoor unit and smaller than the first angle may be set as the third angle.
  • the louvers of the blow ports 5 other than the louvers set to the third angle are set to automatic swing or an optional angle.
  • the present embodiment is configured such that under the preset predetermined operation condition such as the case where the high-speed blowing setting has been made, the angles of the louvers 7 of a part of the multiple blow ports 5 are set to the third angle greater than the fully-closed angle (0 degree) as the louver angle upon stop of the indoor unit and smaller than the first angle as the minimum angle settable from the remote controller or the minimum angle upon auto swing and the louvers 7 of the other blow ports perform the louver operation settable from the remote controller.
  • an advantageous effect can be provided, which provides the indoor unit of the air conditioner configured so that high-speed blowing from a part of the multiple blow ports 5 is allowed and bending of the louver 7 provided at each blow port 5 can be reduced.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Air Conditioning Control Device (AREA)
  • Air-Flow Control Members (AREA)
  • Air Filters, Heat-Exchange Apparatuses, And Housings Of Air-Conditioning Units (AREA)
US16/321,599 2017-12-05 2017-12-05 Indoor unit of air conditioner Abandoned US20200224889A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2017/043574 WO2019111308A1 (fr) 2017-12-05 2017-12-05 Unité intérieure pour climatiseur

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US20200224889A1 true US20200224889A1 (en) 2020-07-16

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US16/321,599 Abandoned US20200224889A1 (en) 2017-12-05 2017-12-05 Indoor unit of air conditioner

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US (1) US20200224889A1 (fr)
EP (1) EP3722692A4 (fr)
JP (1) JP6668552B2 (fr)
KR (1) KR102135622B1 (fr)
CN (1) CN110121621B (fr)
WO (1) WO2019111308A1 (fr)

Cited By (3)

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CN110121621B (zh) 2021-04-27
CN110121621A (zh) 2019-08-13
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KR102135622B1 (ko) 2020-07-20

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