US20200208850A1 - Indoor unit of air conditioner - Google Patents

Indoor unit of air conditioner Download PDF

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Publication number
US20200208850A1
US20200208850A1 US16/327,031 US201816327031A US2020208850A1 US 20200208850 A1 US20200208850 A1 US 20200208850A1 US 201816327031 A US201816327031 A US 201816327031A US 2020208850 A1 US2020208850 A1 US 2020208850A1
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United States
Prior art keywords
angle
louver
indoor unit
louvers
blow
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
US16/327,031
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English (en)
Inventor
Hiroshi TSUNO
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
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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, TSUNO, HIROSHI
Publication of US20200208850A1 publication Critical patent/US20200208850A1/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
    • 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
    • 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
    • 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
    • F24F13/20—Casings or covers
    • F24F2013/207—Casings or covers with control knobs; Mounting controlling members or control units therein

Definitions

  • the present invention relates to an indoor unit of an air conditioner having multiple blow ports and including louvers configured to control the wind direction of each blow port, and is specifically suitable as a four-direction ceiling cassette type indoor unit.
  • a ceiling cassette type indoor unit having multiple blow ports (e.g., four) and including louvers configured to control the wind direction of each blow port has been known as an indoor unit of a typical air conditioner.
  • the louver in the indoor unit of the air conditioner is set to a wind direction set by a user by means of a remote controller, but there is an indoor unit configured such that a louver is forcibly controlled by the indoor unit itself to change a wind direction under a specific operation condition.
  • the operation condition includes a condition when the heating operation start-up control of promptly heating the inside of a room at the start of heating, and a condition when the control of improving temperature unevenness between upper and lower portions inside a room in normal heating operation.
  • the typical technique of performing the heating operation start-up control as described above includes one described in JP-A-8-320145.
  • an indoor unit an room unit of an air conditioner described in Patent Document 1
  • warm air is, at the start of heating operation (upon start-up of the heating operation), directly blown into a living space in a room with a louver angle facing downward, and accordingly, convection heating is performed.
  • the inside of the room is heated.
  • a louver is swung up and down.
  • the wind direction of blown air is controlled to a direction (horizontal blowing) substantially parallel to a ceiling surface such that operation transitions to radiant heating.
  • the typical technique of performing the control of improving temperature unevenness between the upper and lower portions in the room in the normal heating operation includes one described in JP-A-2011-196666 (Patent Document 2).
  • Patent Document 2 in a case where a temperature uneven state is determined, a temperature unevenness elimination controller starts louver swing action. The swing action is stopped in a case where a predetermined condition is satisfied, and thereafter, a louver is controlled to a downward posture.
  • the louver angle is set to a downward direction at the start of heating, and convection heating is performed to heat the inside of the room.
  • the louver is swung up and down so that both of the vicinity of the ceiling and the vicinity of a floor surface on which a person is present can be heated.
  • the louvers of some blow ports are set to a fully-closed position (a position upon stop of operation) such that a wind velocity at the remaining blow ports is increased.
  • a fully-closed position a position upon stop of operation
  • indoor environment with a small difference between upper and lower temperatures (small temperature unevenness) is created.
  • the louvers are bent due to action of the wind pressure of high-temperature air 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 short circuit can be reduced and bending of a louver can be also prevented.
  • the present invention relates to an indoor unit of an air conditioner including a suction port, multiple blow ports provided to surround the periphery of the suction port, 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 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 action of each louver upon operation of the indoor unit is provided.
  • louver angles of some of the multiple blow ports are, in heating operation, 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 automatic swing or downward blowing.
  • the indoor unit of the air conditioner configured so that the short circuit can be reduced and bending of the louver can be also prevented 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 table for describing louver action in start-up operation and subsequent agitation operation in an indoor unit of a typical air conditioner.
  • FIG. 8 is a view for describing a short circuit phenomenon in a case where all louvers are set to downward blowing in the start-up operation and the subsequent agitation operation in FIG. 7 .
  • FIG. 9 is a table for describing louver action in start-up operation and subsequent agitation operation in the first embodiment of the indoor unit of the air conditioner.
  • FIG. 10 is a view for describing the louver action in the agitation operation illustrated in FIG. 9 , a blown air flow, and a sucked air flow.
  • FIG. 11 is a table for describing louver action in start-up operation and subsequent agitation operation in a second embodiment of the indoor unit of the air conditioner.
  • FIG. 12 is a table for describing louver action in start-up operation and subsequent agitation operation in a third embodiment of the indoor unit of the air conditioner.
  • FIGS. 1 to 6 A first embodiment of an indoor unit of an air conditioner of the present invention will be described with reference to FIGS. 1 to 6 .
  • 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 blowing 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 (horizontal blowing).
  • a remote controller not shown
  • the louver 7 performs automatic swing action 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 substantially in a lateral direction (the horizontal direction).
  • the louver 7 performs the automatic swing action 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 in a fully-closed angle state of the louver.
  • 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 action 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 as necessary within a range of about 27 to 30 degrees, for example.
  • the maximum angle (the second angle) may be set as necessary 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 levels in increments of several degrees between the minimum angle and the maximum angle. For example, when the minimum angle is taken as a first level and the maximum angle is taken as a seventh level, five levels (second to sixth levels) 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 levels, and more or less levels may be provided. Alternatively, the louver angle may be steplessly settable to an optional angle.
  • the louver 7 repeats reciprocation action for increasing the angle from the angle at the start of automatic swing setting such as the first level as the minimum angle to the seventh level as the maximum angle in the order of the second level, the third level, . . . and subsequently decreasing the angle to the first level as the minimum angle in the opposite direction in the order of the sixth level, the fifth level, . . . .
  • automatic swing is not limited to the reciprocation action between the first and seventh levels, and for example, may be reciprocation action between the third to seventh levels. Moreover, it may be configured such that upon automatic swing, the louver angle smoothly and steplessly changes.
  • louvers of some 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.
  • 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 (not shown) 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 as necessary within a range of 5 to 25 degrees and preferably a range of 10 to 18 degrees.
  • the third angle corresponds to an angle of a 0.5 level.
  • the angle of the 0.5 level 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 level) as described above.
  • the louvers 7 of some blow ports 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 some blow ports 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 action 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 some blow ports 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 decreased.
  • 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, sufficient blown air can reach a far position 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, an 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 some 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 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 angles of the louvers 7 of some 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 automatic swing, and the louvers 7 of the other blow ports are set to the second angle or automatic swing.
  • FIG. 7 is a table for describing the louver action in start-up operation and subsequent agitation operation in the indoor unit of the typical air conditioner
  • FIG. 8 is a view for describing a short circuit phenomenon in a case where all louvers are brought into downward blowing in the start-up operation and the subsequent agitation operation in FIG. 7
  • FIG. 9 is a table for describing the louver action in start-up operation and the subsequent agitation operation in the indoor unit of the air conditioner of the first embodiment
  • FIG. 10 is a view for describing the louver action in the agitation operation illustrated in FIG. 9 , a blown air flow, and a sucked air flow.
  • louvers 7 A to 7 D of four blow ports 5 illustrated in FIG. 1 are, as illustrated in FIG. 7 , controlled to the second angle (downward blowing), i.e., the maximum angle, in the start-up operation for the heating operation. Thereafter, all of the louvers 7 A to 7 D perform the automatic swing action after a lapse of predetermined time, and the agitation operation is performed. Note that the agitation operation is performed for predetermined time, and normal operation is brought subsequently.
  • 24 indicates the flow of cool indoor air sucked into the suction port 4 of the indoor unit 1 from the vicinity of the floor surface F forming the indoor space R.
  • FIGS. 9 and 10 The indoor unit of the air conditioner of the first embodiment in which the above-described problems of the indoor unit of the typical air conditioner have been solved will be described with reference to FIGS. 9 and 10 .
  • the louvers 7 A to 7 D of four blow ports 5 illustrated in FIG. 1 are controlled as illustrated in FIG. 9 in the first embodiment.
  • control is the same as that illustrated in FIG. 7 on a point that the wind directions of the louvers 7 A to 7 D of all of four blow ports 5 are simultaneously controlled to the second angle (downward blowing) in the heating start-up operation.
  • a difference of the indoor unit 1 of the first embodiment from that of the typical case illustrated in FIGS. 7 and 8 is control of the louvers 7 A to 7 D in the agitation operation performed after a lapse of the predetermined time in the heating start-up operation.
  • the louvers 7 B to 7 D of three blow ports 5 among the louvers 7 of four blow ports 5 perform the automatic swing action to perform the agitation operation, but the louver 7 A of the blow port 5 as one of the louvers 7 of four blow ports 5 is, as illustrated in FIG. 9 , controlled to the third angle (blowing beyond the horizontal direction) described with reference to FIG. 5 .
  • the third angle is the angle (the angle of the 0.5 level) 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 (the angle of the first level) as the minimum opening degree of the louver 7 settable from the remote controller, and is an angle such as 14 degrees.
  • the position 7 c of the louver 7 at the third angle is not the angle settable by the user from the remote controller, but the angle position of the louver 7 automatically set from the control device included at, e.g., the indoor unit 1 of the air conditioner under the preset predetermined operation condition.
  • louvers 7 A to 7 D perform the automatic swing action in the agitation operation.
  • all of four louvers 7 A to 7 D face downward during the automatic swing action.
  • the louver 7 A of the single blow port 5 is set to the third angle (blowing beyond the horizontal direction), and therefore, the following advantageous effects are provided.
  • the louver 7 A is set to the position at the third angle, and therefore, the small clearance 21 can be formed between the wall surface of the blow port 5 and the end portion of the louver 7 as indicated by the hatched circle in FIG. 6 .
  • the air flow can be blown from the clearance 21 , and therefore, bending of the louver 7 A due to the wind pressure can be reduced.
  • the effect of reducing plastic deformation of the louver even in a case where high-temperature air is blown into the room can be provided.
  • the effect of providing the indoor unit of the air conditioner configured so that the short circuit can be reduced and bending of the louver can be also reduced is provided. Moreover, high-speed blowing from the blow ports 5 having the louvers other than the louvers set to the third angle is allowed.
  • action in the heating start-up operation illustrated in FIG. 9 is for a case where the user sets, e.g., a high-load heating mode.
  • the air conditioner automatically performs action of the heating start-up operation illustrated in FIG. 9 .
  • the start-up operation is performed for the predetermined time such as 30 minutes, and subsequently transitions to the agitation operation.
  • the agitation operation is performed for about 10 minutes, and subsequently transitions to the normal operation freely settable by the user from the remote controller.
  • a second embodiment of an indoor unit of an air conditioner of the present invention will be described with reference to FIG. 11 .
  • a basic configuration of the indoor unit 1 is similar to that of the first embodiment described with reference to FIGS. 1 to 6 and 10 , and therefore, description of similar elements will be omitted. Differences of the second embodiment from the first embodiment will be mainly described.
  • FIG. 11 is a table for describing louver action in start-up operation and subsequent agitation operation in the second embodiment of the indoor unit of the air conditioner.
  • control is the same as that illustrated in FIG. 7 on a point that the wind directions of louvers 7 A to 7 D of all of four blow ports 5 are simultaneously controlled to a second angle (downward blowing) in heating start-up operation.
  • a difference of the indoor unit 1 of the second embodiment from that of the first embodiment is control of the louvers 7 A to 7 D in the agitation operation performed after a lapse of predetermined time in the heating start-up operation as illustrated in FIG. 11 .
  • the louvers 7 B to 7 D of three blow ports 5 among the louvers 7 of four blow ports 5 first perform automatic swing action to perform the agitation operation.
  • the louver 7 A of the blow port 5 as one of the louvers 7 of four blow ports 5 is controlled to a third angle (blowing beyond the horizontal direction) as in FIG. 9 .
  • the louver 7 A is controlled to the third angle for preset certain time. Thereafter, the louvers 7 A, 7 C, 7 D of three blow ports 5 among the louvers 7 of four blow ports 5 perform the automatic swing action to perform the agitation operation, and the louver 7 B of the blow port 5 as one of the louvers 7 of four blow ports 5 is controlled and fixed to the third angle (blowing beyond the horizontal direction).
  • the louvers 7 A, 7 B, 7 D of three blow ports 5 next perform the automatic swing action to perform the agitation operation, and the louver 7 C is controlled and fixed to the third angle (blowing beyond the horizontal direction).
  • the louvers 7 A to 7 C of three blow ports 5 next perform the automatic swing action to perform the agitation operation, and the louver 7 D is controlled and fixed to the third angle (blowing beyond the horizontal direction).
  • similar action is repeated in every certain time to perform the agitation operation. Note that after completion, the agitation operation transitions to normal operation.
  • the louver set to the third angle is sequentially controlled and switched in every certain time in the agitation operation as illustrated in FIG. 11 , and therefore, the following advantageous effects are provided.
  • the configuration of the second embodiment provides the effect of reducing unevenness in an indoor temperature.
  • FIG. 12 is a table for describing louver action in start-up operation and subsequent agitation operation in the third embodiment of the indoor unit of the air conditioner. Note that a basic configuration of the indoor unit 1 is similar to that of the first embodiment described with reference to FIGS. 1 to 6 and 10 , and therefore, description of similar elements will be omitted. Differences of the third embodiment from the first embodiment will be mainly described.
  • the wind directions of some louvers 7 A, 7 C (in the present embodiment, two louvers) among louvers 7 of four blow ports 5 are simultaneously controlled to a second angle (downward blowing) in heating start-up operation, and the other louvers 7 B, 7 D are controlled to a third angle (blowing beyond the horizontal direction).
  • control of the louvers 7 A to 7 D in the agitation operation performed after a lapse of predetermined time in the heating start-up operation is similar to that of the first embodiment described with reference to FIG. 9 . That is, in the third embodiment, when the agitation operation begins, the louvers 7 B to 7 D of three blow ports 5 among the louvers 7 of four blow ports 5 perform automatic swing action to perform the agitation operation, and the louver 7 A of the blow port 5 as one of the louvers 7 of four blow ports 5 is controlled to the third angle (blowing beyond the horizontal direction) as illustrated in FIG. 12 .
  • louvers 7 B, 7 D are controlled to the third angle.
  • the effect of allowing such high-speed blowing that the velocity of wind blown downward from the other louvers 7 A, 7 C is further increased and promptly increasing the surrounding temperature of a person in an indoor space is provided.
  • the louvers 7 B, 7 D are controlled to the third angle, and therefore, a sucked air passage 25 (see FIG. 10 ) is formed below the blow ports 5 including the louvers 7 B, 7 D, and cool air at a lower portion in the indoor space R is easily sucked into a suction port 4 of the indoor unit 1 .
  • a short circuit phenomenon described with reference to FIG. 8 can be also reduced.
  • control of the louvers 7 A to 7 D in the agitation operation performed after a lapse of the predetermined time in the heating start-up operation can reduce the short circuit and uniformly heat air across the entirety of the indoor space as in the first embodiment illustrated in FIG. 9 .
  • louvers are controlled to the third angle.
  • bending of the louver due to a wind pressure can be reduced, and plastic deformation of the louver can be reduced even in a case where high-temperature air is blown into a room.
  • louvers 7 B, 7 D are controlled to the third angle in the heating start-up operation.
  • the louvers controlled to the third angle may be 7 A, 7 C, or only any one of four louvers may be controlled to the third angle.
  • the example where the louver 7 A is controlled to the third angle in the agitation operation has been described.
  • any one of four louvers may be, as the louver controlled to the third angle, controlled to the third angle, or it may be configured such that optional multiple louvers are controlled to the third angle.
  • the louver angles of some of the multiple blow ports are, in the heating operation, set to the third angle greater than the fully-closed angle and smaller than the first angle as the minimum angle settable from the remote controller, and the louvers of the other blow ports are set to downward blowing or automatic swing.
  • the louvers other than the louvers set to the third angle are simultaneously set to the second angle as the maximum angle settable from the remote controller, the passage for sucking the indoor air (cool air) can be ensured below each louver controlled to the third angle, and therefore, the short circuit can be reduced.
  • the louvers of some of the multiple blow ports are set to the third angle.
  • the velocity of wind blown from the other blow ports can be increased. Consequently, the surrounding temperature of the person in the indoor space can be promptly increased, and the agitation operation can be efficiently performed.
  • action of the wind pressure of high-temperature air on the louvers set to the third angle can be reduced, and therefore, the effect of reducing bending and plastic deformation of the louvers is provided.
  • the present invention is not limited to the above-described embodiments, and includes variations.
  • the example where all louvers are set to the second angle (downward blowing) or some louvers are set to the third angle (blowing beyond the horizontal direction) in the heating start-up operation has been described.
  • it may be configured such that all louvers are set to automatic swing or some louvers are set to the third angle and the other louvers perform automatic swing.

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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)
  • Air Conditioning Control Device (AREA)
US16/327,031 2018-02-06 2018-02-06 Indoor unit of air conditioner Abandoned US20200208850A1 (en)

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JP3548627B2 (ja) 1995-05-25 2004-07-28 東芝キヤリア株式会社 空気調和機
JP2001116324A (ja) 1999-10-12 2001-04-27 Matsushita Refrig Co Ltd 空気調和機
JP2001174043A (ja) 1999-12-20 2001-06-29 Fujitsu General Ltd 天井埋込型空気調和機
JP2007024453A (ja) * 2005-07-21 2007-02-01 Mitsubishi Electric Corp 空気調和機
CN101839522B (zh) * 2009-03-20 2013-09-04 海尔集团公司 空调及其风向控制方法
JP2011196666A (ja) 2010-03-24 2011-10-06 Daikin Industries Ltd 空気調和機
JP5304574B2 (ja) 2009-09-28 2013-10-02 ダイキン工業株式会社 制御装置
JP4495778B1 (ja) * 2009-10-08 2010-07-07 デンショー株式会社 天井埋め込み型空気調和機およびリモートコントローラ
JP5500181B2 (ja) * 2010-01-26 2014-05-21 ダイキン工業株式会社 空気調和装置の天井設置型室内ユニット
JP2011185591A (ja) * 2010-02-15 2011-09-22 Daikin Industries Ltd 空気調和装置の室内ユニット
JP5267628B2 (ja) * 2011-08-31 2013-08-21 ダイキン工業株式会社 空調室内機
JP2013113469A (ja) * 2011-11-28 2013-06-10 Fujitsu General Ltd 空気調和機
JP5692327B1 (ja) * 2013-09-30 2015-04-01 ダイキン工業株式会社 空気調和装置
CN104713164B (zh) * 2013-12-11 2017-07-21 海尔集团公司 一种嵌入式空调室内机
JP6570916B2 (ja) * 2015-08-13 2019-09-04 三菱重工サーマルシステムズ株式会社 室内機及びそれを備えた空気調和装置、室内機の制御方法並びに制御プログラム
JPWO2017208404A1 (ja) 2016-06-01 2018-10-04 三菱電機株式会社 空気調和機

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CN110352321A (zh) 2019-10-18
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JPWO2019155513A1 (ja) 2020-02-27
WO2019155513A1 (ja) 2019-08-15
EP3751212A1 (en) 2020-12-16
CN110352321B (zh) 2021-03-05
KR20190096928A (ko) 2019-08-20
JP6609722B1 (ja) 2019-11-20

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