WO2017104335A1 - 空気調和装置 - Google Patents
空気調和装置 Download PDFInfo
- Publication number
- WO2017104335A1 WO2017104335A1 PCT/JP2016/083858 JP2016083858W WO2017104335A1 WO 2017104335 A1 WO2017104335 A1 WO 2017104335A1 JP 2016083858 W JP2016083858 W JP 2016083858W WO 2017104335 A1 WO2017104335 A1 WO 2017104335A1
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- WO
- WIPO (PCT)
- Prior art keywords
- air
- indoor
- mode
- airflow
- temperature
- Prior art date
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Classifications
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- 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
- F24F11/76—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 by means responsive to temperature, e.g. bimetal springs
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- 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
- F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
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- 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
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/65—Electronic processing for selecting an operating mode
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- 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
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- 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
- F24F11/89—Arrangement or mounting of control or safety devices
-
- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2140/00—Control inputs relating to system states
- F24F2140/50—Load
-
- 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
- F24F2221/54—Heating and cooling, simultaneously or alternatively
Definitions
- the present invention relates to an air conditioner including an indoor unit that blows air into an indoor space.
- Patent Document 1 Conventionally, for example, an air conditioner as disclosed in Patent Document 1 is known.
- the air conditioning apparatus of Patent Document 1 includes an indoor unit installed near the ceiling, and the indoor unit includes an indoor heat exchanger (heat exchanger).
- the air blowing direction is set to the horizontal direction so that the air that has not yet been heated does not directly hit the occupant. Preventing cold drafts.
- the air blowing direction is set downward so that warm air (that is, warm air) reaches the feet of the occupants. .
- the heating operation is performed when the outside air temperature is relatively low, for example, in winter, cold air easily enters the indoor space from the vicinity of the wall during the heating operation.
- Patent Document 1 when the temperature of the indoor heat exchanger is lower than a predetermined value, the air that has not yet been warmed is blown out horizontally, so that the vicinity of the wall where cold air easily enters is cooled further.
- the temperature of the indoor heat exchanger when the temperature of the indoor heat exchanger is higher than a predetermined value, warm air is blown downward and the area just below the indoor unit is warmed, but cold air still enters the indoor space from near the wall. . Then, for example, the temperature difference between the central portion of the indoor space and the vicinity of the wall remains large.
- the present invention has been made in view of such a point, and an object thereof is to prevent the ingress of cold air from the vicinity of the wall of the indoor space.
- a first aspect of the present disclosure is an air conditioner including an indoor unit (10) that blows air into an indoor space (500), the indoor casing (20) having blowout openings (24a to 24d) formed therein, A wind direction adjusting blade (51) provided in the blow-off openings (24a to 24d) for changing the wind direction of the air blown from the blow-off openings (24a to 24d) in the vertical direction, and the indoor casing (20)
- the temperature of the indoor heat exchanger (32) that is provided inside and heats the air before being blown from the blow-off openings (24a to 24d) by the refrigerant during the heating operation, and the indoor heat exchanger (32)
- the detection result of the first temperature detector (61) for detecting the temperature of the air blown from the outlet openings (24a to 24d) and the first temperature detector (61) during the heating operation is a first predetermined value.
- This air conditioner operates during the heating operation when the temperature of the indoor heat exchanger (32) or the temperature of the air blowing is higher than the first predetermined value.
- warmed air that is, warm air
- warm air is blown out at least in the horizontal direction from the blowout openings (24a to 24d).
- warm air can reach the vicinity of the wall of the indoor space (500), and the flow of cool air from the vicinity of the wall into the indoor space (500) is blocked by the warm air. Accordingly, the ingress of cold air from the vicinity of the wall into the indoor space (500) is prevented, and the temperature difference between the central portion and the peripheral portion (near the wall) of the indoor space (500) is reduced. Furthermore, since warm air flows along the walls of the indoor space (500), the entire indoor space (500) is wrapped with warm air.
- control unit (72) is configured to determine the amount of air blown from the blowout openings (24a to 24d) in the airflow mode during the heating operation.
- the air conditioner is characterized in that the detection result of the first temperature detector (61) is increased as compared with a case where the detection result is lower than the first predetermined value.
- the “increase in air volume” in the airflow mode described above means that if there are a plurality of blowout openings (24a to 24d), pay attention to any one blowout opening (24a to 24d) and blow out from the opening. This means that the air volume of the air to be increased is larger than when the detection result of the first temperature detection unit (61) is lower than the first predetermined value.
- a load index calculation unit (71) that calculates an index representing a load of the indoor space (500) is further provided, and the control unit ( 72, 86) is an air conditioner that performs mode end control to end the air flow mode when the index during the air flow mode in the heating operation is lower than a second predetermined value.
- the interior space (500) has a low load. Become. Therefore, here, when the load in the indoor space (500) becomes low due to the execution of the airflow mode in the heating operation, the airflow mode is terminated because it is unnecessary to execute the airflow mode any more. That is, the airflow mode is executed only when necessary.
- a suction opening (23) is further formed in the indoor casing (20), and the interior of the indoor casing (20) is formed from the suction opening (23).
- a second temperature detection unit (62) for detecting the suction temperature of the air sucked into the heating operation, wherein the index during the airflow mode in the heating operation is lower than the second predetermined value is the heating operation.
- the air conditioner is characterized in that the difference between the set temperature in the airflow mode and the suction temperature is smaller than a predetermined difference.
- the index representing the load on the indoor space (500) is determined by a simple method as described above.
- the compressor (81) further compresses the refrigerant, and the control unit (72, 86)
- the operating frequency of the compressor (81) is lowered so that the detection result of the first temperature detection unit (61) is not more than a third predetermined value, and the detection result of the first temperature detection unit (61) is 3.
- the air conditioner characterized in that the air flow mode is terminated when the value becomes equal to or less than a predetermined value.
- the mode end control for ending the airflow mode is executed with the trigger indicating that the index representing the load on the indoor space (500) during the airflow mode in the heating operation is lower than the second predetermined value.
- the capacity of the compressor (81) is lowered by lowering the operating frequency of the compressor (81) from the previous state.
- the control unit (72) ends the airflow mode when the detection result of the first temperature detection unit (61) becomes equal to or less than the third predetermined value.
- a sixth aspect of the present disclosure is the air conditioner according to the fifth aspect, wherein the third predetermined value is equal to or less than the first predetermined value.
- the third predetermined value that is a threshold value when the airflow mode ends is equal to or less than the first predetermined value that is a threshold value when the airflow mode transitions.
- the third predetermined value that is a threshold value at the end of the airflow mode is set lower than the first predetermined value. It is preferable. Thereby, a control part (72,86) can complete
- control unit (72, 86) is configured such that when the operation integration time in the airflow mode in the heating operation reaches a predetermined time, An air conditioner that performs mode end control to end the airflow mode.
- the fact that the accumulated operation time in the airflow mode in the heating operation has reached a predetermined time means that the airflow mode has been executed for a sufficient time. If the airflow mode is executed for a sufficient time, the ingress of cold air from the vicinity of the wall of the indoor space (500) is sufficiently suppressed, and the indoor space (500) is warmed to some extent. Therefore, when the accumulated operation time in the airflow mode reaches a predetermined time, the control unit (72, 86) performs mode end control. As a result, the airflow mode is not unnecessarily executed.
- the flow of the cold air from the vicinity of the wall into the indoor space (500) is blocked by the warm air, so that the cold air can be prevented from entering the indoor space (500) from the vicinity of the wall. Therefore, the temperature difference between the central part and the peripheral part (near the wall) of the indoor space (500) is reduced. Furthermore, since warm air flows along the walls of the indoor space (500), the entire indoor space (500) is wrapped with warm air.
- the airflow mode is executed only when necessary.
- the index representing the load on the indoor space (500) is determined by a simple method.
- an air conditioning apparatus (100) makes the detection result of a 1st temperature detection part (61) low by making the operating frequency of a compressor (81) low, and airflow mode. Can be terminated.
- a control part (72,86) can complete
- the airflow mode is not unnecessarily executed.
- FIG. 1 is a block diagram schematically illustrating an indoor control unit and devices connected to the indoor control unit according to the embodiment.
- FIG. 2 is a perspective view of the indoor unit as viewed obliquely from below.
- FIG. 3 is a schematic plan view of the indoor unit in which the top plate of the casing body is omitted.
- 4 is a schematic cross-sectional view of the indoor unit showing a cross section taken along line III-O-III in FIG.
- FIG. 5 is a schematic bottom view of the indoor unit.
- FIG. 6 is a cross-sectional view of the main part of the decorative panel showing the wind direction adjusting blades in the horizontal blowing position.
- FIG. 7 is a cross-sectional view of the main part of the decorative panel showing the airflow direction adjusting blade in the lower blowing position.
- FIG. 8 is a cross-sectional view of the main part of the decorative panel showing the wind direction adjusting blades at the airflow block position.
- FIG. 9 is a diagram for explaining conditions for switching between the normal mode and the airflow mode during the heating operation.
- FIG. 10 is an explanatory diagram showing one cycle of the airflow rotation performed by the indoor unit, and schematically shows the lower surface of the indoor unit in each operation.
- FIG. 11 is a plan view of the indoor space showing the temperature distribution in the room when the indoor unit performs airflow rotation during heating operation.
- FIG. 12 is a block diagram schematically illustrating an indoor control unit and devices connected to the indoor control unit according to the first modification of the embodiment.
- the air conditioning apparatus (100) of this embodiment includes an indoor unit (10), an outdoor unit (80), and a remote controller (90).
- the indoor unit (10) and the outdoor unit (80) are connected by a communication pipe, thereby forming a refrigerant circuit in which the refrigerant circulates and performs a refrigeration cycle. Furthermore, the indoor unit (10) and the outdoor unit (80) are also connected to each other by electrical wiring, and are included in the indoor control unit (70) and the outdoor unit (80) included in the indoor unit (10).
- the outdoor control units (85) can communicate with each other.
- the remote controller (90) is communicably connected to the indoor control unit (70) by wire or wireless.
- the indoor unit (10) has a ceiling-embedded type as shown in FIG. 2, and blows air into the indoor space (500).
- the configuration of the indoor unit (10) will be described later.
- the outdoor unit (80) is installed outside the indoor space (500) such as outdoors.
- the outdoor unit (80) includes a compressor (81) that compresses refrigerant, a compressor motor (81a) that drives the compressor (81), and an outdoor control unit (85).
- the outdoor control unit (85) includes a microcomputer including a CPU and a ROM, and functions as a compressor control unit (86) that controls the operating frequency of the compressor (81).
- the remote controller (90) is attached to the wall (502) of the indoor space (500) and receives the operation of the resident. That is, the resident can perform various settings and operation instructions regarding the air conditioner (100) via the remote controller (90). When the remote controller (90) receives various settings and operation instructions, the remote controller (90) transmits them to the indoor control unit (70).
- the remote controller (90) is configured to be able to accept a setting that permits a transition to an airflow mode, which will be described later, and a setting that is not permitted.
- the indoor unit (10) includes a casing (20) (corresponding to an indoor casing), an indoor fan (31), an indoor heat exchanger (32), a drain pan (33), A bell mouth (36), a wind direction adjusting blade (51), a heat exchange temperature sensor (61) (corresponding to a first temperature detection unit), and a suction temperature sensor (62) (corresponding to a second temperature detection unit) And an indoor control unit (70).
- the casing (20) is installed on the ceiling (501) of the indoor space (500).
- the casing (20) includes a casing body (21) and a decorative panel (22).
- the casing (20) accommodates an indoor fan (31), an indoor heat exchanger (32), a drain pan (33), and a bell mouth (36).
- the casing body (21) is inserted and arranged in an opening formed in the ceiling (501) of the indoor space (500).
- the casing body (21) is formed in a substantially rectangular parallelepiped box shape whose bottom surface is open.
- the casing body (21) includes a substantially flat top plate (21a) and a side plate (21b) extending downward from the peripheral edge of the top plate (21a).
- the indoor fan (31) is a centrifugal blower that blows out air sucked from below toward the outside in the radial direction.
- the indoor fan (31) is disposed at the center inside the casing body (21).
- the indoor fan (31) is driven by the indoor fan motor (31a).
- the indoor fan motor (31a) is fixed to the center of the top plate (21a).
- the bell mouth (36) is disposed below the indoor fan (31).
- the bell mouth (36) is a member for guiding the air flowing into the casing (20) to the indoor fan (31).
- the bell mouth (36), together with the drain pan (33), positions the internal space of the casing (20) on the primary space (21c) located on the suction side of the indoor fan (31) and on the blowout side of the indoor fan (31) It is divided into secondary space (21d).
- the indoor heat exchanger (32) is a so-called cross fin type fin-and-tube heat exchanger. As shown in FIG. 3, the indoor heat exchanger (32) is formed in a square shape in a plan view, and is disposed so as to surround the periphery of the indoor fan (31). That is, the indoor heat exchanger (32) is arranged in the secondary space (21d). The indoor heat exchanger (32) causes the air passing from the inside to the outside to exchange heat with the refrigerant in the refrigerant circuit.
- the drain pan (33) is a so-called styrene foam member. As shown in FIG. 4, the drain pan (33) is disposed so as to close the lower end of the casing body (21). On the upper surface of the drain pan (33), a water receiving groove (33b) is formed along the lower end of the indoor heat exchanger (32). The lower end portion of the indoor heat exchanger (32) enters the water receiving groove (33b). The water receiving groove (33b) receives the drain water generated in the indoor heat exchanger (32).
- the drain pan (33) is formed with four main outlet passages (34a to 34d) and four auxiliary outlet passages (35a to 35d).
- the main outlet passages (34a to 34d) and the auxiliary outlet passages (35a to 35d) are passages through which air that has passed through the indoor heat exchanger (32) flows, and penetrate the drain pan (33) in the vertical direction.
- the main outlet passages (34a to 34d) are rectangular through-holes having an elongated cross section.
- One main outlet passage (34a to 34d) is arranged along each of the four sides of the casing body (21).
- the sub blow-out passages (35a to 35d) are rectangular through holes having a slightly curved cross section.
- One sub-blowing passageway (35a to 35d) is disposed at each of the four corners of the casing body (21). That is, in the drain pan (33), the main blowing passages (34a to 34d) and the sub blowing passages (35a to 35d) are alternately arranged along the periphery thereof.
- the decorative panel (22) is a resin member formed in a square thick plate shape.
- the lower part of the decorative panel (22) is formed in a square shape that is slightly larger than the top plate (21a) of the casing body (21).
- the decorative panel (22) is arranged so as to cover the lower surface of the casing body (21).
- the lower surface of the decorative panel (22) constitutes the lower surface of the casing (20) and is exposed to the indoor space (500).
- a single suction port (23) (corresponding to the suction opening) is formed in the center of the decorative panel (22).
- the suction port (23) penetrates the decorative panel (22) up and down and communicates with the primary space (21c) inside the casing (20).
- the air sucked into the casing (20) flows into the primary space (21c) through the suction port (23).
- a lattice-shaped suction grille (41) is provided at the suction port (23).
- a suction filter (42) is disposed above the suction grille (41).
- the decorative panel (22) is formed with a generally rectangular ring-shaped outlet (26) so as to surround the inlet (23). As shown in FIG. 5, the air outlet (26) is divided into four main air outlets (24a to 24d) (corresponding to air outlets) and four sub air outlets (25a to 25d).
- the main outlet openings (24a to 24d) are elongated openings corresponding to the cross-sectional shape of the main outlet passages (34a to 34d).
- One main outlet (24a to 24d) is arranged along each of the four sides of the decorative panel (22).
- the main blowout openings (24a to 24d) of the decorative panel (22) have a one-to-one correspondence with the main blowout passages (34a to 34d) of the drain pan (33).
- Each main outlet opening (24a to 24d) communicates with a corresponding main outlet passage (34a to 34d). That is, the first main outlet opening (24a) is the first main outlet passage (34a), the second main outlet opening (24b) is the second main outlet passage (34b), and the third main outlet opening (24c) is the second main outlet opening (24c).
- the three main outlet passages (34c) and the fourth main outlet passage (24d) communicate with the fourth main outlet passage (34d), respectively.
- the auxiliary blowout openings (25a to 25d) are 1/4 arc-shaped openings.
- One sub-blowing opening (25a to 25d) is arranged at each of the four corners of the decorative panel (22).
- the auxiliary blowing openings (25a to 25d) of the decorative panel (22) correspond one-to-one with the auxiliary blowing passages (35a to 35d) of the drain pan (33).
- Each sub blow opening (25a to 25d) communicates with a corresponding sub blow passage (35a to 35d). That is, the first sub-blowing opening (25a) is the first sub-blowing passage (35a), the second sub-blowing opening (25b) is the second sub-blowing passage (35b), and the third sub-blowing opening (25c) is the first.
- the third sub blowout passage (35c) and the fourth sub blowout opening (25d) communicate with the fourth sub blowout passage (35d), respectively.
- a wind direction adjusting blade (51) is provided in each main outlet opening (24a to 24d).
- the wind direction adjusting blade (51) is a member for adjusting the direction of the blown airflow (that is, the wind direction of the air blown from the main blowout openings (24a to 24d)).
- the wind direction adjusting blade (51) changes the direction of the air flow to the up and down direction. That is, the wind direction adjusting blade (51) changes the direction of the blown airflow so that the angle formed between the direction of the blown airflow and the horizontal direction changes.
- the wind direction adjusting blade (51) is formed in a long and narrow plate shape extending from one end to the other end in the longitudinal direction of the main outlet openings (24a to 24d) of the decorative panel (22). As shown in FIG. 4, the wind direction adjusting blade (51) is supported by the support member (52) so as to be rotatable around a central axis (53) extending in the longitudinal direction.
- the wind direction adjusting blade (51) is curved so that the shape of its transverse cross section (cross section orthogonal to the longitudinal direction) is convex in the direction away from the central axis (53) of the oscillating motion.
- a drive motor (54) is connected to each wind direction adjusting blade (51).
- the wind direction adjusting blade (51) is driven by the drive motor (54), and rotates around the central axis (53) within a predetermined angle range.
- the airflow direction adjusting blade (51) can be displaced to an airflow block position that prevents the flow of air passing through the main blowout openings (24a to 24d), and the main blowout openings (24a to 24d) ) Also serves as an airflow obstruction mechanism (50) that obstructs the blowing airflow.
- the heat exchange temperature sensor (61) is provided near the surface of the indoor heat exchanger (32).
- the heat exchange temperature sensor (61) senses the temperature of the indoor heat exchanger (32).
- the suction temperature sensor (62) is provided in the vicinity of the suction port (23).
- the suction temperature sensor (62) senses the suction temperature of air sucked into the casing body (21) from the suction port (23).
- the indoor control unit (70) includes a memory and a CPU, and controls the operation of the indoor unit (10). As shown in FIG. 1, the indoor control unit (70) includes a heat exchange temperature sensor (61), a suction temperature sensor (62), a drive motor (54) for each airflow direction adjusting blade (51), an indoor fan ( 31) indoor fan motor (31a). Furthermore, the indoor control unit (70) is also communicably connected to the remote controller (90) and the outdoor control unit (85) of the outdoor unit (80).
- the indoor control unit (70) functions as a load index calculation unit (71) and a motor control unit (72) (corresponding to the control unit) when the CPU reads and executes various programs stored in the memory.
- the motor control unit (72) includes a wind direction control unit (73) that controls each drive motor (54) to control the wind direction of the air blown out from each main blowing opening (24a to 24d), and an indoor fan motor ( And a rotational speed controller (74) for controlling 31a).
- the load index calculation unit (71) calculates an index representing the load of the indoor space (500) using the air suction temperature, which is the detection result of the suction temperature sensor (62).
- the index calculation operation by the load index calculation unit (71) is performed when an airflow mode, which will be described later, is executed in the heating operation.
- the load index calculation unit (71) calculates the indoor space according to the difference between the set temperature of the indoor space (500) during execution of the airflow mode in the heating operation and the detection result (suction temperature) of the suction temperature sensor (62). An index representing a load of (500) is calculated.
- the index calculated by the load index calculation unit (71) corresponds to being higher than the second predetermined value.
- the index calculated by the load index calculation unit (71) corresponds to being in a state lower than the second predetermined value. Whether or not the calculation result of the load index calculation unit (71) is higher than the second predetermined value is used for controlling whether or not to end the airflow mode.
- the second predetermined value is desirably set in advance to an appropriate value according to the size of the indoor space.
- the indoor fan (31) In the heating operation according to the present embodiment, in addition to the case where the air heated by the operation of the compressor (81) and the indoor fan (31) is supplied to the indoor space (500), the indoor fan (31) Includes the case where the compressor (81) is temporarily stopped (that is, circulation operation) although the operation is continued. However, the airflow mode described later is performed when the compressor (81) is operating without stopping.
- the wind direction control unit (73) individually controls the position of each wind direction adjusting blade (51) by operating each drive motor (54). Details of the control of the wind direction control unit (73) will be described in “-Control operation of the wind direction control unit”.
- Rotational speed control unit (74) controls the rotational speed of indoor fan (31) by controlling indoor fan motor (31a).
- the indoor fan (31) rotates.
- the indoor air in the indoor space (500) flows into the primary space (21c) in the casing (20) through the suction port (23).
- the air flowing into the primary space (21c) is sucked into the indoor fan (31) and blown out to the secondary space (21d).
- the air flowing into the secondary space (21d) is cooled or heated while passing through the indoor heat exchanger (32), and thereafter, the four main outlet passages (34a to 34d) and the four auxiliary outlet passages (35a). To 35d).
- the air flowing into the main outlet passages (34a to 34d) is blown out to the indoor space (500) through the main outlet openings (24a to 24d).
- the air that has flowed into the auxiliary blowing passages (35a to 35d) is blown into the indoor space (500) through the auxiliary blowing openings (25a to 25d).
- the indoor heat exchanger (32) functions as an evaporator, and the air before being blown into the indoor space (500) passes through the indoor heat exchanger (32). It is cooled by the refrigerant.
- the indoor heat exchanger (32) functions as a condenser, and the air before being blown into the indoor space (500) passes through the indoor heat exchanger (32). It is heated by the refrigerant.
- the wind direction adjusting blade (51) changes the direction of the blown airflow by rotating around the central axis (53).
- the wind direction adjusting blade (51) is movable between a horizontal blowing position shown in FIG. 6 and a lower blowing position shown in FIG. Further, the wind direction adjusting blade (51) can be moved to the airflow block position shown in FIG. 8 by further rotating from the lower blowing position shown in FIG.
- the direction of the air flow flowing downward through the main blowing passages (34a to 34d) is changed to the horizontal direction.
- the blown airflow from the blowout openings (24a to 24d) becomes a horizontal blown state.
- the direction of the blown airflow at the main blowing openings (24a to 24d) (that is, the direction of the air blown from the main blowing openings (24a to 24d)) is set to, for example, about 25 ° with respect to the horizontal direction. .
- the direction of the blown airflow is slightly lower than the horizontal direction, but it can be said that the direction of the airflow is substantially horizontal. In this way, the blown airflow is in a horizontal blowing state, so that the air blown from the main blower openings (24a to 24d) can reach the wall (502) of the indoor space (500).
- the horizontal blowing state is not limited to about 25 ° downward with respect to the horizontal direction, and includes a state of about 25 ° upward with respect to the horizontal direction, that is, slightly upward from the horizontal direction. Also good.
- the direction of the air flow flowing downward through the main blowing passages (34a to 34d) is generally maintained as it is, and the main blowing is performed.
- the blown airflow from the openings (24a to 24d) is in the bottom blowing state.
- the direction of the blown airflow is an obliquely downward direction slightly inclined in a direction away from the suction port (23) rather than just below.
- the flow rate (air volume) of the air passing through the main blowout openings (24a to 24d) corresponding to the remaining wind direction adjusting blades (51), which are positions, increases compared to before the change. That is, when a part of all the wind direction adjusting blades (51) is changed from the position shown in FIG. 6 or 7 to the airflow block position (FIG. 8), the entire air conditioner (100) is changed. Although the blown-out air volume decreases, when viewed in units of the main blow-off openings (24a to 24d) in the state of FIG. 6 or FIG. 7 before and after the change, the air volume increases after the change than before the change.
- the motor control unit (72) automatically controls both the direction and the amount of air blown from the main blow-off openings (24a to 24d). To control each wind direction adjusting blade (51) and the indoor fan (31).
- the position of the wind direction adjusting blade (51) is basically the downward position in FIG.
- the indoor fan (31) rotates at a sufficiently lower rotational speed than the maximum rotational speed of the indoor fan (31).
- the detection result of the heat exchange temperature sensor (61) that is, the indoor heat exchanger (
- the air direction control unit (73) of the motor control unit (72) changes the mode in the heating operation to the air blown out from the main outlet openings (24a to 24d).
- At least the airflow mode for horizontally blowing is switched to control the wind direction adjusting blade (51).
- the operation integration time (described later) in the airflow mode also satisfies the condition that it is less than a predetermined time.
- the first predetermined value is preferably set in advance to about 35 degrees, for example.
- heating operation is performed when the outside air temperature is relatively low, such as in winter, and during heating operation, cold air enters the indoor space (500) from the vicinity of the wall of the indoor space (500). May come. If the cool air is allowed to enter the indoor space (500), the effect of the heating operation is diminished.
- the detection result of the heat exchange temperature sensor (61) is higher than the first predetermined value during the normal mode in the heating operation, the heating operation is performed in the airflow mode described above.
- the fact that the detection result of the heat exchange temperature sensor (61) is higher than the first predetermined value during the normal mode in heating operation means that the indoor heat exchanger (32) has warmed the air to a somewhat high temperature. It corresponds to.
- the operation is switched from the normal mode to the air flow mode, and reliably warm air blown from the main blowing openings (24a to 24d) is supplied at least in the horizontal direction.
- This air reaches the wall (502) of the indoor space (500) and flows downward along the wall (502).
- the wall (502) of the indoor space (500) is warmed by warm air, and the temperature of the wall (502) of the indoor space (500) rises.
- the air that has reached the wall (502) blocks the flow of cold air entering the indoor space (500) from the wall (502). Accordingly, the difference in temperature between the central portion and the peripheral portion (near the wall) of the indoor space (500) is reduced, and the indoor space (500) is eventually enveloped by warm air.
- the amount of air (airflow) blown from the main blowout openings (24a to 24d) is converted into heat exchange during heating operation. Control is also performed so that the detection result of the temperature sensor (61) is higher than when the detection result is lower than the first predetermined value (in the normal mode).
- Examples of methods for increasing the air volume include the following (I) to (III).
- a wind direction control part (73) makes arbitrary wind direction adjustment blades (51) among four wind direction adjustment blades (51) into the air current block position shown in FIG.
- the rotation speed control unit (74) performs control to make the rotation speed of the indoor fan (31) higher than that in the normal mode.
- the wind direction control unit (73) causes an arbitrary wind direction adjusting blade (51) to be at the airflow block position of FIG. 8, and the rotation speed control unit (74) normally sets the rotation speed of the indoor fan (31). Control higher than in mode.
- the airflow direction adjusting blade (51) of one main outlet opening (24a) is set as the airflow block position, and the airflow direction adjusting blades (51 of the remaining main outlet openings (24b to 24d)) ) Is set to the horizontal blowing state (horizontal blowing position). That is, in the method (I), it can be said that the total opening area of the main outlet openings (24a to 24d) in the airflow mode is smaller than that in the normal mode. In this case, air is not substantially blown out from the main outlet opening (24a) to the indoor space (500).
- air with an increased air volume compared to that in the normal mode is at least approximately horizontal. Will be blown out in the direction.
- the rotation speed of the indoor fan (31) can be increased. For this reason, it goes without saying that air with an increased air volume is blown out in a substantially horizontal direction from the main blowing openings (24a to 24d) set at the horizontal blowing position.
- the above method (III) represents the case where both the method (I) and the method (II) are employed.
- air having a higher air volume than the above (I) and (II) is sent in the horizontal direction from the main outlet openings (24a to 24d) provided with the wind direction adjusting blades (51) that take the horizontal blowing position. Blown out.
- the wind speed is naturally increased, and relatively warm air reliably reaches the vicinity of the wall of the indoor space (500). Therefore, the wall (502) of the indoor space (500) is heated more reliably than in the normal mode, and the flow of cold air entering the indoor space (500) from the wall (502) is more reliably blocked. Is done.
- the motor control unit (72) of the indoor control unit (70) and the compressor control unit of the outdoor control unit (85) ( 86) performs mode end control to end the airflow mode when any of the following conditions (A) to (C) is satisfied in the airflow mode in the heating operation.
- the motor control unit (72) continues to monitor the temperature of the indoor heat exchanger (32) that is constantly detected by the heat exchange temperature sensor (61).
- the compressor control unit (86) sets the compressor so that the temperature of the indoor heat exchanger (32), which is the detection result of the heat exchange temperature sensor (61), is equal to or lower than a third predetermined value.
- the operating frequency of (81) is lowered than immediately before the start of mode end control.
- the wind direction control unit (73) of the motor control unit (72) automatically switches the wind direction of each wind direction adjusting blade (51) to control the motor.
- the rotation speed control unit (74) of the unit (72) switches the air volume automatically. That is, when the temperature of the indoor heat exchanger (32) becomes equal to or lower than the third predetermined value through the mode end control, the mode in the heating operation is switched to the normal mode.
- the air direction after switching to the normal mode is basically the downward position in FIG. 7, and the air volume after switching to the normal mode is smaller than that in the air flow mode.
- the third predetermined value used in the mode end control is set to be equal to or less than the first predetermined value used for switching from the normal mode to the airflow mode.
- the third predetermined value is preferably set lower than the first predetermined value.
- the first predetermined value can be set at about 36 ° C. and the third predetermined value can be set at about 34 ° C.
- the first predetermined value and the third predetermined value are both threshold values for the temperature of the indoor heat exchanger (32), but the actual temperature of the indoor heat exchanger (32) is maintained at a strictly constant temperature. It does not mean that it fluctuates between predetermined widths.
- the temperature of the indoor heat exchanger (32) may be higher or lower than the first predetermined value and the third predetermined value in a short time.
- the first predetermined value is set higher than the third predetermined value, for example, by about 2 ° C., thereby preventing the hunting of the mode switching operation.
- the motor controller (72) accumulates the execution time of the airflow mode. As shown in the upper part of the arrow extending from “normal mode” to “airflow mode” in FIG. 9, when the accumulated operation time in the airflow mode does not reach a predetermined time in the normal mode, the normal mode is changed to the airflow mode. It becomes possible to switch again. Therefore, if the airflow mode is once ended but then restarted, the motor control unit (72) operates in the airflow mode after the restart in the integrated operation time of the airflow mode until it ends once. The accumulated operation time in the airflow mode is updated by adding the time.
- the motor control unit (72) and the compressor control unit (86) are placed in the indoor space (500). Is sufficiently warmed by the airflow mode, it is determined that there is no need to execute the airflow mode any more, and mode end control is performed.
- the accumulated operation time may be reset when the setting is changed via the remote controller (90), for example.
- the setting in this case corresponds to switching of the operation type from the heating operation to the cooling operation, the setting for forcibly turning off the airflow mode, and the like.
- the above (C) represents a case where the operation type of the air conditioner (100) is switched from the heating operation to an operation other than the heating operation.
- As the operation other than the heating operation for example, a defrost operation and a cooling operation are performed. Can be mentioned. Since the airflow mode according to the present embodiment is a mode in the heating operation, if the operation type of the air conditioner (100) is switched to other than the heating operation, there is no meaning to execute the airflow mode. Therefore, when the above (C) is satisfied, the mode end control is performed.
- conditions for executing the mode end control may exist in addition to the above (A) to (C).
- Other conditions include a case where the compressor (81) temporarily stops operation (so-called thermo-off state).
- Airflow rotation which is an application example of the airflow mode described above will be described.
- the airflow rotation is performed as the airflow mode when the detection result of the heat exchange temperature sensor (61) in the normal mode in the heating operation is higher than the first predetermined value and the operation integration time in the airflow mode is less than the predetermined time. Is called.
- the wind direction control unit (73) controls the position of the wind direction adjusting blade (51) so that the indoor unit (10) can execute a normal blowing operation, a first blowing operation, and a second blowing operation described later. To do. Further, the wind direction control unit (73) changes the position of the wind direction adjusting blade (51) provided in each main outlet opening (24a to 24d) so that the indoor unit (10) performs the air rotation shown in FIG. Control.
- the first normal blowing operation, the first blowing operation, the second normal blowing operation, and the second blowing operation are sequentially performed. That is, in one cycle of the airflow rotation, two normal blowing operations, one first blowing operation, and one second blowing operation are performed.
- the rotational speed of the indoor fan (31) is kept substantially constant during the airflow rotation.
- adopted is taken as an example as a method of raising an air volume during airflow rotation.
- the opening (24d) is referred to as “first opening (24X)”, and the remaining first main blowout opening (24a) and third main blowout opening (24c) are referred to as “second opening (24Y)”.
- the wind direction control unit (73) sets the wind direction adjusting blades (51) of all the main blowing openings (24a to 24d) to the lower blowing position. For this reason, in the normal blowing operation during the heating operation, air is blown downward from the four main blowing openings (24a to 24d).
- the wind direction control unit (73) sets the wind direction adjusting blades (51) of the two main blowing openings (24b, 24d) constituting the first opening (24X) to the horizontal blowing position. Then, the wind direction adjusting blades (51) of the two main outlet openings (24a, 24c) constituting the second opening (24Y) are set at the airflow block position. For this reason, air is blown into the indoor space (500) from the second main blow opening (24b) and the fourth main blow opening (24d), and the first main blow opening (24a) and the third main blow opening (24c). Is not substantially blown into the indoor space (500).
- the blown air volume and the wind speed of the second main blower opening (24b) and the fourth main blower opening (24d) are higher than the blown air volume and the wind speed in the normal blowing operation. That is, in the first blow-out operation, the air flows from the second main blow-off opening (24b) and the fourth main blow-off opening (24d) in a substantially horizontal direction with an increased air volume and a higher flow rate than during the normal blow-out operation. Is blown out.
- the wind direction control unit (73) sets the wind direction adjusting blades (51) of the two main blowing openings (24a, 24c) constituting the second opening (24Y) to the horizontal blowing position. Then, the wind direction adjusting blades (51) of the two main outlet openings (24b, 24d) constituting the first opening (24X) are set at the airflow block position. For this reason, air is blown into the indoor space (500) from the first main blow opening (24a) and the third main blow opening (24c), and the second main blow opening (24b) and the fourth main blow opening (24d). Is not substantially blown into the indoor space (500).
- the blown air volume and the wind speed of the first main blower opening (24a) and the third main blower opening (24c) are higher than the blown air volume and the wind speed in the normal blowing operation. That is, in the second blow-out operation, the conditioned air is substantially increased from the two first main blow-off openings (24a) and the third main blow-off opening (24c) with an increased air volume and a higher flow rate than during the normal blow-out operation. Is blown out horizontally.
- the duration of the first normal blowing operation, the duration of the first blowing operation, the duration of the second normal blowing operation, and the second blowing is set to the same time (for example, 120 seconds).
- FIG. 11 shows the simulation result of the temperature distribution of the indoor space (500) during the heating operation of the indoor unit (10).
- FIG. 11 shows the air temperature at a position 60 cm from the floor of the indoor space (500), 20 minutes after the indoor unit (10) starts the heating operation. Moreover, in FIG. 11, the temperature is higher as the hatching density is higher.
- the room to be simulated has a substantially square floor and two parallel desks (511) having a partition (510) in the center.
- the indoor unit (10) is arrange
- the wind direction adjusting blades (51) of all the main blowing openings (24a to 24d) are set to the lower blowing position, for example, as in the normal mode described above. Then, the conventional indoor unit (610) blows out the air heated when passing through the indoor heat exchanger (32) from all the main blowing openings (24a to 24d) substantially toward the floor surface.
- the temperature is very high in the central region located below the indoor unit (610). This is presumably because the warm conditioned air blown downward from the indoor unit (610) stays in the central region of the indoor space (500) sandwiched between the two partitions (510).
- the temperature does not rise sufficiently in the peripheral area away from the indoor unit (610). This is presumably because the warm conditioned air blown downward from the indoor unit (610) cannot reach the region closer to the wall (502) than the partition (510).
- warm conditioned air blown out from the indoor unit (10) is blown out in a substantially horizontal direction with an increased air volume and a higher flow rate than in the normal blowing operation. Therefore, in the first blowing operation and the second blowing operation, warm conditioned air blown from the indoor unit (10) flows above the partition (510) and reaches the wall (502) of the indoor space (500). . For this reason, in the indoor space (500), the temperature rises even in the peripheral region away from the indoor unit (10).
- the warm conditioned air blown from the indoor unit (10) reaches the wall (502) of the indoor space (500) and moves downward along the wall (502). It flows to. For this reason, the wall (502) of the indoor space (500) is warmed by the conditioned air, and as a result, the temperature of the wall (502) of the indoor space (500) rises. Accordingly, in the region around the indoor space (500), the temperature (temperature) can be prevented from decreasing even when the wall (502) is heated by the conditioned air.
- the temperature difference between the central portion and the peripheral portion of the indoor space (500) is greatly reduced as compared with the case where the conventional indoor unit (610) performs the heating operation. .
- the wind direction control unit (73) reciprocates, for example, the wind direction adjusting blades (51) of all the main blowing openings (24a to 24d) between the horizontal blowing position and the lower blowing position.
- the flow of relatively cool air blown from the main blowing openings (24a to 24d) varies according to the operation of each wind direction adjusting blade (51).
- the air conditioner (100) of the present embodiment moves to the air flow mode and operates.
- warmed air warmed air
- the airflow mode warmed air (warm air) is blown out at least in the horizontal direction from the blowout openings (24a to 24d).
- warm air can reach the vicinity of the wall of the indoor space (500), and the flow of cool air from the vicinity of the wall into the indoor space (500) is blocked by the warm air. Accordingly, the ingress of cold air from the vicinity of the wall into the indoor space (500) is prevented, and the temperature difference between the central portion and the peripheral portion (near the wall) of the indoor space (500) is reduced. Furthermore, since warm air flows along the walls of the indoor space (500), the entire indoor space (500) is wrapped with warm air.
- the air volume blown from the blowout openings (24a to 24d) is the same as the temperature of the indoor heat exchanger (32) in the heating operation. It is increased as compared with the case where it is lower (in the normal mode). This makes it easier for warm air to reach the vicinity of the wall of the indoor space (500) in the airflow mode. Accordingly, it is possible to more reliably prevent the cold air from entering the indoor space (500) from the vicinity of the wall.
- the mode end control for ending the airflow mode is performed.
- the air flow mode is executed and the ingress of cold air from the vicinity of the wall of the indoor space (500) into the indoor space (500) is suppressed and the entire indoor space (500) is warmed, the interior space (500) has a low load. Become. Therefore, in the present embodiment, when the load in the indoor space (500) becomes low due to the execution of the airflow mode in the heating operation, the airflow mode is terminated because it is not necessary to execute any more airflow modes. That is, it can be said that the airflow mode is executed only when necessary.
- the index is determined by the difference between the set temperature and the suction temperature in the airflow mode in the heating operation.
- the index representing the load on the indoor space (500) is determined by a simple method.
- the compressor control unit (86) sets the operation frequency of the compressor (81) so that the detection result of the heat exchange temperature sensor (61) is equal to or lower than the third predetermined value. Control to decrease from the immediately preceding state is performed. As the operating frequency of the compressor (81) decreases, the capacity of the compressor (81) decreases, and the temperature of the indoor heat exchanger (32) and the air blowing temperature decrease. When the detection result of the heat exchange temperature sensor (61) is equal to or less than the third predetermined value, the airflow mode is terminated.
- the third predetermined value that is a threshold value when the airflow mode ends is equal to or less than the first predetermined value that is a threshold value when the airflow mode is shifted.
- the third predetermined value that is a threshold value at the end of the airflow mode is set lower than the first predetermined value. It is preferable. Thereby, a motor control part (72) and a compressor control part (86) can complete
- the mode end control is performed when the accumulated operation time in the airflow mode in the heating operation reaches a predetermined time.
- the fact that the accumulated operation time in the airflow mode in the heating operation has reached a predetermined time means that the airflow mode has been executed for a sufficient time. If the airflow mode is executed for a sufficient time, the ingress of cold air from the vicinity of the wall of the indoor space (500) is sufficiently suppressed, and the indoor space (500) is warmed to some extent. Therefore, when the accumulated operation time in the airflow mode reaches a predetermined time, the motor control unit (72) and the compressor control unit (86) perform mode end control. As a result, the airflow mode is not unnecessarily executed.
- an outlet temperature sensor (161) may be provided as the first temperature detector as shown in FIG.
- the blowout temperature sensor (161) is provided near the blowout openings (24a to 24d) and detects the temperature of air blown from the blowout openings (24a to 24d).
- the motor control unit (72) when the temperature of the blown air, which is the detection result of the blowout temperature sensor (161), is higher than the first predetermined value, the wind direction adjusting blade (51 ) To control.
- the blowout temperature is monitored instead of the temperature of the indoor heat exchanger (32), and the operation frequency of the compressor (81) is lowered so that the blowout temperature becomes the third predetermined value or less. Is done. Then, when the blowing temperature becomes equal to or lower than the third predetermined value, the airflow mode ends.
- the indoor unit (10) is not limited to the ceiling embedded type.
- the indoor unit (10) may be a ceiling hanging type or a wall hanging type. Regardless of the type of indoor unit (10), if the temperature of the indoor heat exchanger (32) or the blowing temperature is higher than the first predetermined value during the heating operation, the indoor unit (10) is blown from the blowing openings (24a to 24d). It is only necessary to execute an air flow mode in which at least horizontal air is blown.
- air may be blown out slightly upward from the horizontal in the ceiling-embedded type using the Coanda effect in the airflow mode.
- the angle of the wind direction adjusting blade (51), which is the horizontal blowing position, with respect to the horizontal direction is such that the air blown from the main blowing openings (24a to 24d) can reach the vicinity of the wall of the indoor space (500) (10 )
- To the wall surface of the indoor space (500) may be finely adjusted as appropriate.
- the distance from the position of the indoor unit (10) to the wall surface of the indoor space (500) is measured by the installation operator when the indoor unit (10) is installed in the indoor space (500) and is input to the indoor control unit (70).
- a sensor for measuring the distance may be attached to the indoor unit (10) in advance.
- a condition may be imposed in which the difference between the floor temperature of the indoor space (500) and the suction temperature is a certain difference or more. In this case, it is preferable to detect the floor temperature of the indoor space (500) using a floor temperature sensor (not shown).
- the floor temperature sensor is easier to detect than the actual floor temperature due to the influence of the blown air. Therefore, in this case, the detection result of the floor temperature sensor is corrected, and the difference between the detection result of the corrected floor temperature sensor and the detection result of the suction temperature sensor (62) that has not been corrected is a certain difference or more. More preferably, conditions are imposed.
- the above-mentioned certain difference may be appropriately set and changed via the remote controller (90) to a value according to the environment of the indoor space (500).
- the accumulated operation time in the airflow mode does not necessarily have to be calculated.
- the condition relating to the accumulated operation time is omitted from the mode transition conditions.
- the load index calculation unit (71) does not use the detection result of the suction temperature sensor (62) but calculates the detection result of the suction temperature sensor (62) when calculating the index representing the load of the indoor space (500). You may use the value which correct
- the air blown from the main blowout opening (24a to 24d) or the sub blowout opening (25a to 25d) is immediately sucked into the casing (20) from the suction opening (23) without circulating through the indoor space (500) It is effective for.
- the method for calculating the index representing the load on the indoor space (500) during the airflow mode in the heating operation may not be limited to the method using the set temperature and the detection result of the suction temperature sensor (62).
- the index may be calculated using an average value of the detection result of the suction temperature sensor (61) and the floor temperature of the indoor space (500). In this case, not the detection result itself of the suction temperature sensor (62) but the detection result of the corrected suction temperature sensor (62) may be used.
- the index may be determined from the wall load or floor load of the indoor space (500).
- the timing at which the index is calculated may be every predetermined time interval, or may be when the user of the indoor space (500) is operated via the remote controller.
- the detection result of the indoor temperature detection sensor installed in the indoor space (500) may be used.
- the types of indoor temperature sensors that are individually installed may be those that perform wireless communication as well as those that perform wired communication.
- the number of main blowout openings (24a to 24d) is not limited to four, and may be one or two, for example.
- the indoor unit (10) may include a shutter for closing the main blow-off openings (24a to 24d) as an airflow inhibiting mechanism, separately from the wind direction adjusting blade (51).
- the airflow inhibition mechanism is preferably provided corresponding to the main blow-off openings (24a to 24d), and can be constituted by, for example, an open / close shutter.
- the application example of the airflow mode (airflow rotation) described above is not limited to FIG. 10, and may be, for example, an operation in which a normal blowing operation, a first blowing operation, and a second blowing operation are sequentially repeated.
- the first blowout operation and the second blowout operation supply air to the indoor space (500) from the two adjacent main blowout openings (24a to 24d), and the remaining next The operation may be such that the airflow direction adjusting blades (51) of the two main blowout openings (24a to 24d) that match are set to the airflow block position.
- Control to increase the air volume is not essential.
- methods other than the above (I) to (III) may be employed.
- the method (II) or (III) may be employed instead of the method (I), or a method other than (I) to (III) may be employed. May be.
- the duration of each operation in the airflow rotation is not the same time (for example, 120 seconds) but may be different.
- the airflow direction adjusting blade (51) has a corresponding main outlet opening (24a to 24d). May be completely closed.
- the conditions (A) to (C) have been described as conditions for ending the airflow mode.
- the end condition of the airflow mode is not necessarily limited to the above (A) to (C), and the airflow mode may be ended when a condition other than the above (A) to (C) is satisfied.
- the mode end control in the airflow mode may be other than the operation of lowering the operating frequency of the compressor (81) to lower the temperature of the indoor heat exchanger (32). Further, the third predetermined value used in the mode end control does not necessarily have to be equal to or less than the first predetermined value.
- the present invention is useful for an air conditioner including an indoor unit that blows air into an indoor space.
- Indoor unit 20 Casing (indoor casing) 24a-24d Main outlet opening (outlet opening) 51 Wind direction adjusting blade 61 Heat exchange temperature sensor (first temperature detector) 62 Suction temperature sensor (second temperature detector) 71 Load index calculator 72 Motor control unit (control unit) 81 Compressor 86 Compressor controller 100 air conditioner 500 indoor space
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Abstract
Description
-空気調和装置の構成-
図1に示すように、本実施形態の空気調和装置(100)は、室内ユニット(10)と、室外ユニット(80)と、リモートコントローラ(90)とを備える。
図1~図5に示すように、室内ユニット(10)は、ケーシング(20)(室内ケーシングに相当)と、室内ファン(31)と、室内熱交換器(32)と、ドレンパン(33)と、ベルマウス(36)と、風向調節羽根(51)と、熱交換温度センサ(61)(第1温度検知部に相当)と、吸込温度センサ(62)(第2温度検知部に相当)と、室内制御部(70)とを備えている。
ケーシング(20)は、室内空間(500)の天井(501)に設置されている。ケーシング(20)は、ケーシング本体(21)と化粧パネル(22)とによって構成されている。このケーシング(20)には、室内ファン(31)と、室内熱交換器(32)と、ドレンパン(33)と、ベルマウス(36)とが収容されている。
図4に示すように、室内ファン(31)は、下方から吸い込んだ空気を径方向の外側に向けて吹き出す遠心送風機である。室内ファン(31)は、ケーシング本体(21)の内部中央に配置されている。室内ファン(31)は、室内ファンモータ(31a)によって駆動される。室内ファンモータ(31a)は、天板(21a)の中央部に固定されている。
ベルマウス(36)は、室内ファン(31)の下方に配置されている。このベルマウス(36)は、ケーシング(20)へ流入した空気を室内ファン(31)へ案内するための部材である。ベルマウス(36)は、ドレンパン(33)と共に、ケーシング(20)の内部空間を、室内ファン(31)の吸い込み側に位置する一次空間(21c)と、室内ファン(31)の吹き出し側に位置する二次空間(21d)とに仕切っている。
室内熱交換器(32)は、いわゆるクロスフィン型のフィン・アンド・チューブ熱交換器である。図3に示すように、室内熱交換器(32)は、平面視でロ字状に形成され、室内ファン(31)の周囲を囲むように配置されている。つまり、室内熱交換器(32)は、二次空間(21d)に配置されている。室内熱交換器(32)は、その内側から外側へ向かって通過する空気を、冷媒回路の冷媒と熱交換させる。
ドレンパン(33)は、いわゆる発泡スチロール製の部材である。図4に示すように、ドレンパン(33)は、ケーシング本体(21)の下端を塞ぐように配置されている。ドレンパン(33)の上面には、室内熱交換器(32)の下端に沿った水受溝(33b)が形成されている。水受溝(33b)には、室内熱交換器(32)の下端部が入り込んでいる。水受溝(33b)は、室内熱交換器(32)において生成したドレン水を受け止める。
化粧パネル(22)は、四角い厚板状に形成された樹脂製の部材である。化粧パネル(22)の下部は、ケーシング本体(21)の天板(21a)よりも一回り大きな正方形状に形成されている。この化粧パネル(22)は、ケーシング本体(21)の下面を覆うように配置されている。また、化粧パネル(22)の下面は、ケーシング(20)の下面を構成し、室内空間(500)に露出している。
図5に示すように各主吹出し開口(24a~24d)には、風向調節羽根(51)が設けられている。風向調節羽根(51)は、吹出し気流の方向(即ち、主吹出し開口(24a~24d)から吹き出される空気の風向)を調節するための部材である。
図4に示すように、熱交換温度センサ(61)は、室内熱交換器(32)の表面付近に設けられている。熱交換温度センサ(61)は、室内熱交換器(32)の温度をセンシングする。
図4に示すように、吸込温度センサ(62)は、吸込口(23)付近に設けられている。吸込温度センサ(62)は、吸込口(23)からケーシング本体(21)内に吸い込まれる空気の吸込温度をセンシングする。
室内制御部(70)は、メモリ及びCPUによって構成されており、室内ユニット(10)の動作を制御する。図1に示すように、室内制御部(70)は、熱交換温度センサ(61)と、吸込温度センサ(62)と、各風向調節羽根(51)の駆動モータ(54)と、室内ファン(31)の室内ファンモータ(31a)と接続されている。更に、室内制御部(70)は、リモートコントローラ(90)及び室外ユニット(80)の室外制御部(85)とも、通信可能に接続されている。
室内ユニット(10)の運転中には、室内ファン(31)が回転する。室内ファン(31)が回転すると、室内空間(500)の室内空気が、吸込口(23)を通ってケーシング(20)内の一次空間(21c)へ流入する。一次空間(21c)へ流入した空気は、室内ファン(31)に吸い込まれ、二次空間(21d)へ吹き出される。
上述したように、風向調節羽根(51)は、中心軸(53)まわりに回転移動することによって、吹出し気流の方向を変更する。風向調節羽根(51)は、図6に示す水平吹き位置と、図7に示す下吹き位置との間を移動可能となっている。また、風向調節羽根(51)は、図7に示す下吹き位置から更に回転移動することによって、図8に示す気流ブロック位置にも移動可能となっている。
〈暖房運転時の基本的な気流について〉
先ず、本実施形態に係るモータ制御部(72)の制御動作の本質について、図9を参照しつつ説明する。
本実施形態に係る暖房運転においては、図9に示すように、通常モードと気流モードとの2つのモードが存在する。特にことわりのない限り、暖房運転は、通常モードにて実行される。
(I)風向制御部(73)は、4つの風向調節羽根(51)のうち任意の風向調節羽根(51)を、図8で示した気流ブロック位置にする。
(II)回転速度制御部(74)は、室内ファン(31)の回転速度を通常モード時よりも高くする制御を行う。
(III)風向制御部(73)は、任意の風向調節羽根(51)を図8の気流ブロック位置にさせ、且つ、回転速度制御部(74)は、室内ファン(31)の回転速度を通常モード時よりも高くする制御を行う。
次に、上述した気流モードの終了条件について、同じく図9を参照しつつ説明する。
(A)暖房運転における気流モード時の負荷指標算出部(71)の算出結果(室内空間(500)の負荷を表す指標)が、第2所定値よりも低くなった場合
(B)暖房運転における気流モード時での運転積算時間が、所定時間に達した場合
(C)運転種類が、暖房運転から暖房運転以外の運転に切り換えられた場合
上記(A)では、暖房運転における気流モードの実行によって室内空間(500)がある程度暖まってくると、吸込温度、つまりは室内空間(500)内の温度が設定温度に近付いていく。吸込温度と設定温度との差が所定差よりも小さくなることで、室内空間(500)の負荷を表す指標は、第2所定値よりも低くなる。この場合、モータ制御部(72)及び圧縮機制御部(86)は、室内空間(500)が十分に暖まっておりこれ以上気流モードを実行する必要はないと判断し、モード終了制御を行う。
次に、上述した気流モードの応用例である気流ローテーションについて述べる。気流ローテーションは、暖房運転における通常モード時の熱交換温度センサ(61)の検知結果が第1所定値よりも高く且つ気流モードでの運転積算時間が所定時間未満である場合に、気流モードとして行われる。
暖房運転時の室内空間(500)の温度分布について、図11を参照しながら説明する。
冷房運転では、風向制御部(73)は、例えば全ての主吹出し開口(24a~24d)の風向調節羽根(51)を、水平吹き位置と下吹き位置との間で往復移動させる。これにより、主吹出し開口(24a~24d)から吹き出される比較的冷たい空気の気流は、各風向調節羽根(51)の動作に応じて変動する。
本実施形態の空気調和装置(100)は、暖房運転時、室内熱交換器(32)の温度が第1所定値よりも高い場合、気流モードに移行して運転を行う。気流モードでは、吹出し開口(24a~24d)からは、暖められた空気(暖気)が、少なくとも水平方向に吹き出される。これにより、暖気は、室内空間(500)の壁付近に到達することができ、壁付近から室内空間(500)内への冷気の流れは、暖気により遮断される。従って、壁付近から室内空間(500)への冷気の進入は防がれ、室内空間(500)の中央部と周辺部(壁付近)における気温の差は縮小される。更に、暖気は、室内空間(500)の壁を伝って流れるため、室内空間(500)全体が暖気で包まれる。
熱交換温度センサ(61)の代わりに、図12に示すように、吹出し温度センサ(161)が第1温度検知部として設けられてもよい。
室内ユニット(10)は、天井埋め込みタイプに限定されない。室内ユニット(10)は、天井吊り下げタイプまたは壁掛けタイプであってもよい。室内ユニット(10)がどのようなタイプであっても、暖房運転時に室内熱交換器(32)の温度または吹出し温度が第1所定値よりも高い場合、吹出し開口(24a~24d)から吹き出される空気を少なくとも水平に吹かせる気流モードが実行されれば良い。
水平吹き位置である風向調節羽根(51)の水平方向に対する角度は、主吹出し開口(24a~24d)から吹き出される空気が室内空間(500)の壁付近に到達できる程度に、室内ユニット(10)の位置から室内空間(500)の壁面までの距離に応じて適宜微調整されていてもよい。室内ユニット(10)の位置から室内空間(500)の壁面までの距離は、室内ユニット(10)を室内空間(500)に据え付ける際に据付作業者によって測定され室内制御部(70)に入力されてもよいし、当該距離を測定するためのセンサが予め室内ユニット(10)に取り付けられていても良い。
一旦気流モードを行った後に再び気流モードを行うかどうかを判断する際、通常モードから気流モードへの移行条件として、既に述べた室内熱交換器(32)の温度または吹出し温度に関する条件及び気流モードでの運転積算時間の条件に加え、室内空間(500)の床温度と吸込温度との差が一定差以上である条件が課されても良い。この場合、室内空間(500)の床温度は、床温度センサ(図示せず)を用いて検知することが好ましい。
負荷指標算出部(71)は、室内空間(500)の負荷を表す指標の算出の際、吸込温度センサ(62)の検知結果そのものを利用するのではなく、吸込温度センサ(62)の検知結果を補正した値を利用してもよい。これにより、室内空間(500)の実際の負荷を精度良く表した指標が得られる。主吹出し開口(24a~24d)や副吹出し開口(25a~25d)から吹き出された空気が、室内空間(500)を循環せずに直ちに吸込口(23)からケーシング(20)内に吸い込まれる場合に有効である。
暖房運転における気流モード時の室内空間(500)の負荷を表す指標を算出する方法は、設定温度と吸込温度センサ(62)の検知結果とを利用した方法に限定されずとも良い。例えば、吸込温度センサ(61)の検知結果と室内空間(500)の床温度との平均値を用いて上記指標が算出されてもよい。この場合、吸込温度センサ(62)の検知結果そのものではなく、補正後の吸込温度センサ(62)の検知結果が利用されても良い。
暖房運転時の室内空間(500)の負荷を表す指標の算出には、吸込温度センサ(62)に代えて、室内空間(500)に個別に設置された室内の温度検知用のセンサの検知結果、またはその補正結果が利用されてもよい。なお、個別に設置される室内の温度検知用のセンサの種類は、有線を用いた通信を行うもののみならず、無線通信を行うものであってもよい。
主吹出し開口(24a~24d)の数は、4つに限定されず、例えば1つまたは2つであってもよい。
室内ユニット(10)は、風向調節羽根(51)とは別途、主吹出し開口(24a~24d)を塞ぐためのシャッタを、気流阻害機構として備えていてもよい。この場合、気流阻害機構は、主吹出し開口(24a~24d)に対応して設けられることが好ましく、例えば開閉式のシャッタで構成されることができる。
上述した気流モードの応用例(気流ローテーション)は、図10に限定されず、例えば通常吹出し動作と、第1吹出し動作と、第2吹出し動作とを順に繰り返し行うような動作であってもよい。
また、気流モードの応用例(気流ローテーション)における第1吹出し動作および第2吹出し動作は、隣り合う二つの主吹出し開口(24a~24d)から空気を室内空間(500)へ供給し、残りの隣り合う二つの主吹出し開口(24a~24d)の風向調節羽根(51)を気流ブロック位置とする動作であってもよい。
風量を高める制御は、必須ではない。また、風量を高める制御が行われる場合は、上記(I)~(III)以外の方法が採用されてもよい。
気流ローテーションにおける各動作の継続時間は、互いに同じ時間(例えば、120秒)ではなく、異なっていても良い。
風量を高める制御として上記(I)または(III)が採用された場合、図8の気流ブロック位置を採ることに代えて、風向調節羽根(51)は、対応する主吹出し開口(24a~24d)を完全に閉じてもよい。
気流モードの終了条件として、上記実施形態では、条件(A)~(C)について説明した。しかし、気流モードの終了条件は、必ずしも上記(A)~(C)に限定されずともよく、上記(A)~(C)以外の条件が成立した場合に気流モードは終了しても良い。
気流モードのモード終了制御は、圧縮機(81)の運転周波数を低下させて室内熱交換器(32)の温度を低下させる動作以外であっても良い。また、モード終了制御にて利用される第3所定値は、必ずしも第1所定値以下でなくてもよい。
20 ケーシング(室内ケーシング)
24a~24d 主吹出し開口(吹出し開口)
51 風向調節羽根
61 熱交換温度センサ(第1温度検知部)
62 吸込温度センサ(第2温度検知部)
71 負荷指標算出部
72 モータ制御部(制御部)
81 圧縮機
86 圧縮機制御部
100 空気調和装置
500 室内空間
Claims (7)
- 室内空間(500)に空気を吹き出す室内ユニット(10)を備えた空気調和装置であって、
吹出し開口(24a~24d)が形成された室内ケーシング(20)と、
上記吹出し開口(24a~24d)に設けられ、該吹出し開口(24a~24d)から吹き出される空気の風向を上下方向に変更するための風向調節羽根(51)と、
上記室内ケーシング(20)内部に設けられており、暖房運転時、上記吹出し開口(24a~24d)から吹き出される前の空気を冷媒によって加熱する室内熱交換器(32)と、
上記室内熱交換器(32)の温度または上記吹出し開口(24a~24d)から吹き出される空気の温度を検知する第1温度検知部(61)と、
上記暖房運転時、上記第1温度検知部(61)の検知結果が第1所定値よりも高い場合、上記吹出し開口(24a~24d)から吹き出される空気を少なくとも水平に吹かせる気流モードにて、上記風向調節羽根(51)を制御する制御部(72)と
を備えることを特徴とする空気調和装置。 - 請求項1において、
上記制御部(72)は、上記気流モードにおいて、上記吹出し開口(24a~24d)から吹き出される空気の風量を、上記暖房運転時における上記第1温度検知部(61)の検知結果が上記第1所定値よりも低い場合に比して増大させる
ことを特徴とする空気調和装置。 - 請求項1または請求項2において、
上記室内空間(500)の負荷を表す指標を算出する負荷指標算出部(71)、
を更に備え、
上記制御部(72,86)は、上記暖房運転における上記気流モード時の上記指標が第2所定値よりも低い場合、該気流モードを終了させるモード終了制御を行う
ことを特徴とする空気調和装置。 - 請求項3において、
上記室内ケーシング(20)には、吸込み開口(23)が更に形成されており、
上記吸込み開口(23)から上記室内ケーシング(20)内に吸い込まれる空気の吸込温度を検知する第2温度検知部(62)、
を更に備え、
上記暖房運転における上記気流モード時の上記指標が上記第2所定値よりも低い場合とは、上記暖房運転における上記気流モード時の設定温度と上記吸込温度との差が所定差よりも小さい場合である
ことを特徴とする空気調和装置。 - 請求項3または請求項4において、
冷媒を圧縮する圧縮機(81)、
を更に備え、
上記制御部(72,86)は、上記モード終了制御では、
上記第1温度検知部(61)の検知結果が第3所定値以下となるように上記圧縮機(81)の運転周波数を低下させ、
上記第1温度検知部(61)の検知結果が上記第3所定値以下となった時、上記気流モードを終了する
ことを特徴とする空気調和装置。 - 請求項5において、
上記第3所定値は、上記第1所定値以下である
ことを特徴とする空気調和装置。 - 請求項1または請求項2において、
上記制御部(72,86)は、上記暖房運転における上記気流モードでの運転積算時間が所定時間に達した場合、上記気流モードを終了させるモード終了制御を行う
ことを特徴とする空気調和装置。
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JP6222211B2 (ja) | 2017-11-01 |
BR112018011599A2 (ja) | 2018-11-27 |
CN108291735B (zh) | 2019-04-30 |
EP3372913A1 (en) | 2018-09-12 |
JP2017110880A (ja) | 2017-06-22 |
BR112018011599A8 (pt) | 2022-11-16 |
US10422546B2 (en) | 2019-09-24 |
CN108291735A (zh) | 2018-07-17 |
EP3372913A4 (en) | 2019-06-19 |
ES2813566T3 (es) | 2021-03-24 |
AU2016370983B2 (en) | 2018-07-26 |
US20180299164A1 (en) | 2018-10-18 |
EP3372913B1 (en) | 2020-06-03 |
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