JP2004150731A - Air conditioner - Google Patents

Air conditioner Download PDF

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Publication number
JP2004150731A
JP2004150731A JP2002317697A JP2002317697A JP2004150731A JP 2004150731 A JP2004150731 A JP 2004150731A JP 2002317697 A JP2002317697 A JP 2002317697A JP 2002317697 A JP2002317697 A JP 2002317697A JP 2004150731 A JP2004150731 A JP 2004150731A
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JP
Japan
Prior art keywords
indoor unit
air
person
indoor
blowing
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.)
Pending
Application number
JP2002317697A
Other languages
Japanese (ja)
Inventor
Masakazu Hirai
Toru Iwata
透 岩田
政和 平居
Original Assignee
Daikin Ind Ltd
ダイキン工業株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Daikin Ind Ltd, ダイキン工業株式会社 filed Critical Daikin Ind Ltd
Priority to JP2002317697A priority Critical patent/JP2004150731A/en
Publication of JP2004150731A publication Critical patent/JP2004150731A/en
Pending legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/0007Indoor units, e.g. fan coil units
    • F24F1/0011Indoor units, e.g. fan coil units characterised by air outlets
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/0007Indoor units, e.g. fan coil units
    • F24F1/0043Indoor units, e.g. fan coil units characterised by mounting arrangements
    • F24F1/0047Indoor units, e.g. fan coil units characterised by mounting arrangements mounted in the ceiling or at the ceiling
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00Control or safety arrangements
    • F24F11/30Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2120/00Control inputs relating to users or occupants
    • F24F2120/10Occupancy
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2120/00Control inputs relating to users or occupants
    • F24F2120/10Occupancy
    • F24F2120/12Position of occupants

Abstract

An air conditioner equipped with an indoor unit (1) that is installed on a ceiling in a room and has a variable air blowing direction controlled by a controller to reduce drafts and achieve uniform temperature distribution in the room. To reduce the cost.
An infrared sensor (43) for detecting whether or not a person (M) exists in a person detection area (C) including a position below an indoor unit (1) is provided in the indoor unit (1). Further, the indoor unit (1) is controlled to blow horizontally, and when the infrared sensor (43) detects the absence of the person (M) during the heating operation of the indoor unit (1), the indoor unit (1) is controlled to blow downward. A wind direction control unit is provided in the controller.
[Selection] Fig. 6

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an air conditioner, and particularly to a measure for reducing a draft feeling of a user.
[0002]
[Prior art]
2. Description of the Related Art In general, an air conditioner that is installed on a ceiling in a room and blows out conditioned air from an outlet to a room is known. A decorative panel is attached to the bottom of the casing of the air conditioner. A square-shaped inlet is formed in the center of the decorative panel, and, for example, four outlets are formed around the inlet. The air outlet is formed in an elongated rectangular shape extending along each side of the air inlet, and is provided with a flap (oscillating blade) for adjusting an air blowing direction. The flap is swingable up and down around the longitudinal axis of the outlet. Then, the flap is swung to appropriately change the air blowing direction at the air outlet, and the conditioned air is sent to the entire room to make the temperature distribution in the room uniform.
[0003]
However, if the flap is simply swung up and down to blow air over the entire room, there is a problem in that the wind directly hits the indoor users, giving an unpleasant draft feeling.
[0004]
Therefore, conventionally, it is known to control the air blowing direction so as to blow out the conditioned air at a predetermined area in a room where the user is not present. For example, the entire room is scanned by an infrared sensor, and the indoor region is divided into a floor region where a user or a desk does not exist and a user region where a user or a desk exists. When the amount of infrared rays detected in the floor area is equal to or less than the set value, it is determined that the user is not in the floor area. In addition, when the area of the floor area is equal to or larger than the predetermined value, it is determined that air can be blown to the floor area without affecting the user in the user area adjacent to the floor area. Based on the above determination, the air blowing direction is adjusted, and air is blown to the center of the floor area (for example, see Patent Document 1). By doing so, it is possible to achieve both a reduction in draft feeling and a uniform temperature distribution in the room.
[0005]
[Patent Document 1]
JP-A-6-82084
[0006]
[Problems to be solved by the invention]
However, in the above-described conventional air conditioner, a motor must be connected to the infrared sensor and the driving of the motor must be controlled with high accuracy in order to accurately scan the entire room with the infrared sensor. Further, an arithmetic unit for determining a floor area in which air can be blown out based on a detection result of the infrared sensor obtained by driving the motor is required. As a result, the configuration for controlling the air blowing direction at the air outlet becomes complicated, and it is inevitable that the cost increases.
[0007]
The present invention has been made in view of the above points, and an object of the present invention is to simplify a configuration for achieving both a reduction in draft and a uniform temperature distribution in a room, thereby reducing costs. It is to plan.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, in the present invention, the indoor unit is controlled to blow horizontally, and the indoor unit is controlled to blow downward when the human detection unit detects the absence of a person during the heating operation.
[0009]
Specifically, the invention according to claim 1 includes an indoor unit (1) that is installed on a ceiling in a room and blows conditioned air into the room, and the air blowing direction of the indoor unit (1) is at least horizontal blowing and downward blowing. The present invention is directed to an air conditioner variably configured as described above. And a person detecting means (43) for detecting whether or not a person exists in a predetermined area (C) of the indoor space including a position below the indoor unit (1), and blowing the indoor unit (1) horizontally. And a wind direction control means (51) for controlling the indoor unit (1) to blow downward when the human detection means (43) detects the absence of a person during the heating operation of the indoor unit (1). I have.
[0010]
According to the above invention, the conditioned air is basically blown out horizontally from the indoor unit (1) installed on the ceiling in the room and sent to the upper space in the room. Thereby, indoor air conditioning is performed. By the way, during the heating operation of the indoor unit (1), when the absence of a person is detected in the predetermined area (C) of the indoor space including the position below the indoor unit (1) by the human detection means (43), The unit (1) is controlled to blow downward by the wind direction control means (51), and warm conditioned air is sent to the lower space of the room. As a result, the draft is reduced because the conditioned air is blown out to a space where no one is present. Furthermore, the air in the lower space of the room is warmed by appropriately blowing the warm conditioned air downward during the heating operation, so that the temperature in the room is made uniform.
[0011]
That is, the human detection means (43) whose detection target is only the predetermined area (C) below the indoor unit (1), and the indoor unit (1) is blown horizontally based on the detection result of the human detection means (43). Alternatively, with a simple configuration of the wind direction control means (51) for controlling downward blowing, it is possible to achieve both a reduction in draft and a uniform temperature in the room.
[0012]
In the invention according to claim 2, in the invention according to claim 1, when the indoor unit (1) detects the absence of a person by the human detection means (43) during the blowing operation in which the cooling operation is suspended, the indoor unit (1). An airflow direction changing means (52) for changing the control of the airflow direction control means (51) so as to control the unit (1) to blow downward is provided.
[0013]
According to the above-described invention, when the indoor temperature becomes lower than the predetermined lower limit temperature during the cooling operation, the cooling operation is stopped, and the air blowing operation for blowing air without cooling is performed. At this time, when the absence of a person is detected in the predetermined area (C) below the indoor unit (1) by the person detecting means (43), the blowing direction changing means (52) controls the wind direction controlling means (51). To change. That is, the indoor unit (1) is controlled to blow downward, and relatively warm air is sent to the lower space of the room. Therefore, the air that is too cold in the lower space of the room is appropriately heated.
[0014]
The invention according to claim 3 is the invention according to claim 1 or 2, wherein the human detecting means (43) detects the presence of a person when the indoor unit (1) is in a blowing operation in which the heating operation or the cooling operation is suspended. Then, there is provided a blowing air volume control means (53) for reducing the blowing air volume of the indoor unit (1).
[0015]
According to the above invention, in the air blowing operation in which the heating operation and the cooling operation are stopped, when the human detection means (43) detects that a person is present in the predetermined area (C), the air volume control means for air blowing (53). Reduces the amount of air blown from the indoor unit (1). That is, the air blown from the indoor unit (1) is controlled by the blowing air flow control means (53) to reduce the air flow, and is blown out in the horizontal direction by the air direction control means (51). As a result, when a blowing operation is performed and a person is present in the predetermined area (C), the blowing amount is reduced, so that the energy for driving the blowing fan is reduced and the driving of the blowing fan is accompanied. Noise is reduced.
[0016]
The invention according to claim 4 is the invention according to claim 1, wherein when the difference between the indoor temperature and the indoor set temperature is greater than or equal to a predetermined value, the indoor unit (1) is controlled to blow horizontally during the cooling operation, A uniform wind direction changing means (54) for changing the control of the wind direction control means (51) so as to control the indoor unit (1) to blow downward during the heating operation is provided.
[0017]
According to the above invention, during the cooling operation, when the difference between the indoor temperature and the indoor set temperature is greater than or equal to a predetermined value and the indoor temperature is relatively high, the uniform wind direction changing means (54) is provided by the wind direction control means. The control of (51) is changed to control the indoor unit (1) to blow horizontally.
[0018]
Further, during the heating operation, when the difference between the indoor temperature and the indoor set temperature is greater than or equal to a predetermined value and the indoor temperature is relatively low, the uniform wind direction changing means (54) is controlled by the wind direction control means (51). Change control to blow down. That is, the indoor unit (1) is controlled to blow downward regardless of the detection result of the human detection means (43), and even if the presence of a human is detected in the predetermined area (C) by the human detection means (43). Then, warm conditioned air is blown downward from the indoor unit (1). Therefore, the room temperature rises quickly.
[0019]
According to a fifth aspect of the present invention, in the first aspect of the present invention, the indoor unit (1) is controlled to blow horizontally when the cooling operation is started, and the indoor unit (1) is controlled to blow downward when the heating operation is started. The operation-starting wind direction changing means (55) for changing the control of the wind direction control means (51) is provided.
[0020]
According to the above invention, at the start of the cooling operation and at the start of the heating operation, the operation start wind direction changing means (55) changes the control of the wind direction control means (51). That is, the indoor unit (1) is controlled to blow horizontally at the start of the cooling operation, and is controlled to blow downward at the start of the heating operation, regardless of the detection result of the human detection means (43). Therefore, at the start of the heating operation, even if the presence of a person is detected in the predetermined area (C) by the person detection means (43), warm conditioned air is blown downward from the indoor unit (1). The air rises quickly.
[0021]
According to a sixth aspect of the present invention, in the first aspect of the invention, a plurality of the indoor units (1) are installed in one room, and the presence of a person is detected by the person detecting means (43). ) To control and reduce the blown air flow, and to control and increase the blown air flow of the indoor unit (1) in which the absence of a person has been detected by the human detecting means (43). Have.
[0022]
According to the above invention, among the plurality of indoor units (1) installed in one room, in the predetermined indoor unit (1) in which the human detection means (43) detects the presence of a person, the air flow control means for balancing is used. (56) reduces the amount of air blown from the indoor unit (1). On the other hand, in the indoor unit (1) in which the human detection means (43) detects the absence of a person, the balancing air flow control means (56) increases the blowout air volume of the indoor unit (1).
[0023]
As a result, the amount of blown air in the indoor unit (1) in which the presence of a person has been detected by the person detecting means (43) is reduced, so that the draft is further reduced and the absence of a person is detected by the person detecting means (43). Since the amount of blown air in the detected indoor unit (1) increases, indoor heating or cooling is sufficiently performed.
[0024]
According to a seventh aspect of the present invention, in the sixth aspect, the balancing air volume control means (56) receives a detection result of the human detection means (43) of each indoor unit (1) by wireless communication. It is configured as follows.
[0025]
According to the invention described above, the detection result of the human detection means (43) of each indoor unit (1) is transmitted by wireless communication and received by the balancing air volume control means (56). Then, based on the received detection result of the individual detection means, the balancing air volume control means (56) compensates for, for example, the blowout air volume reduced by the indoor unit (1) in which the presence of a person is detected. Control is performed so as to increase the amount of air blown from the indoor unit (1) where the absence of a person has been detected.
[0026]
BEST MODE FOR CARRYING OUT THE INVENTION
(Embodiment 1)
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[0027]
1 to 4 show a first embodiment of an air conditioner according to the present invention. The air conditioner includes a refrigerant circuit (not shown) that performs a vapor compression refrigeration cycle, and an outdoor unit (not shown) that is an outdoor unit and an indoor unit that is connected to the outdoor unit via a refrigerant pipe. Machine (1). The outdoor unit has a compressor (not shown) installed outdoors. On the other hand, the indoor unit (1) is installed on a ceiling (70) in the room and configured to blow out conditioned air into the room.
[0028]
As shown in FIGS. 1 and 2, the indoor unit (1) is configured as a ceiling-embedded indoor unit that is embedded and installed in an installation opening (71) that opens into a ceiling plate (ceiling surface) (70). I have. The indoor unit (1) contains a fan (20) and a heat exchanger (30) in a casing (10).
[0029]
As shown in FIG. 2, the casing (10) has a box-shaped main casing (10a) that opens downward and a decorative panel (14) that is a casing bottom that covers the bottom opening of the main casing (10a). ). The main casing (10a) includes a top plate (12) and a side plate (13) extending downward from an outer edge of the top plate (12). As shown in FIG. 1, the decorative panel (14) is formed of a substantially square plate member, and four corners are formed in an arc shape. The decorative panel (14) is attached to the lower end of the side plate (13) of the main body casing (10a), and is attached to the ceiling plate (70) such that the peripheral edge thereof contacts the lower surface of the ceiling plate (70). Attached along.
[0030]
At a substantially central portion of the decorative panel (14), a square suction port (15) is opened. An air filter (17) for removing suspended matters such as dust contained in room air is provided on the entire surface of the suction port (15), and the air filter (17) is a lattice filter. It is fixedly supported by the cover (19).
[0031]
In the filter cover (19), a person exists in a predetermined area of the indoor space including a position below the indoor unit (1) (hereinafter, referred to as a human detection area (C)) substantially at the center of the suction port (15). An infrared sensor (43) is provided as a human detecting means for detecting whether or not to perform. As shown in FIGS. 5 and 6, the human detection area (C) is an area that extends conically downward at a predetermined angle from the infrared sensor (43). The infrared sensor (43) outputs a detection result to a controller (45) described later.
[0032]
As shown in FIG. 2, the fan (20) is a so-called turbo fan in which a blade (23) is held between a shroud (21) and a hub (22). The fan (20) is disposed at a substantially central position inside the casing (10), and is attached to the casing (10) via a fan motor (25).
[0033]
That is, a fan motor (25) is fastened and fixed to the center of the top plate (12) by bolts or the like. The drive shaft (26) of the fan motor (25) extends downward and is connected to the hub (22) of the fan (20). A bell mouth (27) is provided below the fan (20) to guide the air flowing into the casing (10) from the suction port (15) to a lower portion of the fan (20). The fan (20) is driven to rotate by the driving force of the fan motor (25), and the air sucked from the suction port (15) through the bell mouth (27) is radiated to the outside of the fan (20) in the radial direction. To be sent out. Inside the bell mouth (27), a temperature sensor (44) for detecting the temperature of room air sucked into the casing (10) is provided.
[0034]
The heat exchanger (30) is a so-called cross fin composed of a number of plate-like fins (31) provided in parallel with each other and a heat transfer tube (32) provided through the fins (31). It is a heat exchanger. The heat exchanger (30) is formed in a rectangular cylindrical shape in plan view, and is disposed so as to surround the fan (20).
[0035]
The heat exchanger (30) is connected to an outdoor unit (not shown) via a refrigerant pipe (not shown). The heat exchanger (30) operates as an evaporator during cooling operation and as a condenser during heating operation, and generates conditioned air by cooling or heating the air sent from the fan (20). Is configured. A drain pan (33) for receiving drain water is provided below the heat exchanger (30).
[0036]
As shown in FIG. 1, the decorative panel (14) has four outlets (16). The outlet (16) is formed in an elongated rectangular shape outside the suction port (15) so as to extend along four sides of the suction port (15).
[0037]
An air passage (18) for guiding the conditioned air generated by the heat exchanger (30) to the outlet (16) is formed in the decorative panel (14). As shown in an enlarged manner in FIG. 3, the air passage (18) has outer guide surfaces (16a, 16b) as outer peripheral side walls of the decorative panel (14) and inner guide surfaces (16) as inner peripheral side walls. 16c, 16d). The outer guide surfaces (16a, 16b) extend substantially vertically downward from the lower end of the first outer guide surface (16a) to the lower surface of the decorative panel (14) toward the panel outer peripheral side. And a second outer guide surface (16b) inclined obliquely downward. On the other hand, the inner guide surfaces (16c, 16d) have a first inner guide surface (16c) extending substantially vertically downward, and gently diagonally downward from the lower end of the first inner guide surface (16c) toward the outer peripheral side of the panel. And a second inner guide surface (16d) that is inclined.
[0038]
The outlet (16) is provided with a substantially rectangular plate-shaped swinging blade (38) extending along the outlet (16). As shown in FIG. 3, the swinging blade (38) is slightly curved in the width direction, and connection pins (41, 41) projecting outward are formed at both ends in the length direction. Have been. The swing blade (38) is swingably supported by the decorative panel (14) at the connecting pins (41, 41).
[0039]
The connecting pin (41) of each swinging blade (38) is connected via a connecting shaft (not shown), and one connecting shaft is connected to a drive shaft of a motor (not shown). In this way, when the motor is driven, the four swing blades (38) swing vertically up and down via the respective connection shafts and the connection pins (41).
[0040]
Thus, the air conditioner is configured such that the air blowing direction of the indoor unit (1) is variably changed to at least horizontal blowing and downward blowing by swinging the swinging blade (38) up and down.
[0041]
The tip of the oscillating blade (38) is moved to the inside of the decorative panel (14) around the axis of the connecting pin (41) (see the two-dot chain line in FIG. 3), and the tip is connected to the connecting pin (41). ) Can be pivoted between a horizontal position (see a solid line in FIG. 3) that has moved to the outside of the decorative panel (14) around the axis of ()). That is, the indoor unit (1) moves the tip of the oscillating blade (38) to the horizontal position to blow out the conditioned air in a substantially horizontal direction, and moves the tip of the oscillating blade (38) to the lower position. By doing so, either the downward blowing of blowing the conditioned air downward is performed.
[0042]
A controller (45) is provided in the casing (10). As shown in FIG. 4, the controller (45) includes a wind direction control unit (51), a blow direction change unit (52), and a blow amount control unit (53).
[0043]
As shown in FIGS. 5 and 6, the wind direction control unit (51) controls the indoor unit (1) to blow horizontally, and the infrared sensor (43) detects the person (M) during the heating operation of the indoor unit (1). ) Is detected, the indoor unit (1) is controlled to blow downward. Thus, the indoor unit (1) basically blows out the conditioned air from the air outlet (16) in the horizontal direction and sends it to the upper space in the room (hereinafter referred to as the non-living area (A)), while the heating operation is performed. When the person (M) is not present in the person detection area (C), the conditioned air is blown downward and sent to the lower space in the room (hereinafter referred to as the living area (B)). The living area (B) is an area extending from the indoor floor surface to a height of about 1.8 m. On the other hand, the non-living area (A) is an area above the living area (B) in the room.
[0044]
Incidentally, the compressor (not shown) of the refrigerant circuit is controlled to be driven or stopped based on the indoor temperature detected by the temperature sensor (44), and the indoor temperature is set to a predetermined appropriate temperature including the indoor set temperature. It is configured to maintain a range. When the infrared sensor (43) detects the absence of the person (M) during the air blowing operation in which the compressor is stopped and the indoor unit (1) suspends the cooling operation, the air flow direction changing unit (52) for air blowing is described. The control of the wind direction controller (51) is changed so as to control the indoor unit (1) to blow downward. That is, when the person (M) is not present in the person detection area (C), the indoor unit (1) is controlled to be horizontally blown by the wind direction control unit (51) during the cooling operation, and the cooling operation is stopped. During the blowing operation, the air is blown downward by the blowing direction changing unit (52). In this way, air is blown to a space where the person (M) is not located in the living area (B).
[0045]
By the way, the controller (45) is configured to control the blowout air volume of the indoor unit (1) to a predetermined set airflow during the heating operation and the cooling operation. On the other hand, when the infrared sensor (43) detects the presence of the person (M) during the air blowing operation in which the indoor unit (1) suspends the heating operation or the cooling operation, the air volume control unit for air blowing (53) detects the indoor state. The blower air volume of the machine (1) is configured to be smaller than the predetermined set air flow.
[0046]
In this way, the controller (45) controls the air blowing direction and the blowing air volume of the indoor unit (1) based on the detection result of the infrared sensor (43) and the operation state of the indoor unit (1), respectively. Is configured.
[0047]
-Operation of air conditioner-
Next, the operation of the air-conditioning apparatus according to Embodiment 1 will be described with reference to FIGS. In this air conditioner, the air sucked through the suction port (15) and the bell mouth (27) is blown into the room from the air outlet (16) through the heat exchanger (30) by driving the fan motor (25). . The cooling operation is performed by using the heat exchanger (30) as an evaporator, and the heating operation is performed by using the heat exchanger (30) as a condenser.
[0048]
[Table 1]
[0049]
<Cooling operation>
When the indoor temperature detected by the temperature sensor (44) is outside the predetermined temperature range including the indoor set temperature, the compressor is driven to cool the air with the heat exchanger (30). Is performed. As shown in Table 1, during the cooling operation, the indoor unit is used both when the person (M) exists in the person detection area (C) and when the person (M) does not exist in the person detection area (C). (1) is controlled by the wind direction control unit (51) so that horizontal blowing is performed.
[0050]
That is, the wind direction controller (51) drives and controls the motor to swing the swinging blade (38) to the horizontal position as shown by the solid line in FIG. As a result, the conditioned air cooled by the heat exchanger (30) is blown out from the outlet (16) to a substantially horizontal non-living area (A) as shown in FIG. Be done.
[0051]
When the room temperature is within the above-mentioned predetermined temperature range, the compressor is stopped and the air blowing operation is performed. When the person (M) is present in the person detection area (C) during the air blowing operation, the indoor unit (1) is controlled by the air direction control unit (51) to be horizontally blown, and the air volume control unit for air blowing ( 53), control is performed so that the amount of blown air is reduced. The blowing air volume control unit (53) controls the rotation speed of the fan (20) to reduce the blowing air volume from the set air volume.
[0052]
On the other hand, when the person (M) does not exist in the person detection area (C) during the blowing operation, the control of the wind direction control unit (51) is changed by the blowing direction control unit (52). That is, as shown by the two-dot chain line in FIG. 3, the swing blade (38) swings to the lower position, and the indoor unit (1) is controlled to blow downward. As a result, as shown in FIG. 6, the air is blown out from the outlet (16) to the lower living area (B), and the relatively low-temperature air stored in the living area (B) is stirred.
[0053]
<Heating operation>
When the indoor temperature is outside the predetermined temperature range including the indoor set temperature, the compressor is driven to perform the heating operation of heating the air with the heat exchanger (30). As shown in Table 1, when the person (M) exists in the person detection area (C) during the heating operation, the indoor unit (1) is controlled to be horizontally blown by the wind direction control unit (51). As a result, as shown in FIG. 5, the conditioned air heated by the heat exchanger (30) is blown out from the outlet (16) in a substantially horizontal direction, thereby heating the room.
[0054]
However, when the person (M) does not exist in the person detection area (C) during the heating operation, the indoor unit (1) is controlled to blow downward by the wind direction control unit (51). As a result, as shown in FIG. 6, the air heated by the heat exchanger (30) is blown downward from the outlet (16), and the relatively low-temperature air in the living area (B) is preferentially warmed. Can be
[0055]
When the room temperature is within the above-mentioned predetermined temperature range, the compressor is stopped and the air blowing operation is performed. When the person (M) is present in the person detection area (C) during the blowing operation, the indoor unit (1) is controlled to be horizontally blown by the wind direction control unit (51) as in the cooling operation. At the same time, the blower air volume control unit (53) controls the blower air volume to be reduced.
[0056]
On the other hand, when the person (M) does not exist in the person detection area (C) during the blowing operation, the indoor unit (1) is set to the same state as when the person (M) exists in the person detection area (C). , And is controlled to blow downward by the wind direction control unit (51). In this way, the blowing direction and the blowing air amount of the indoor unit (1) are controlled by the controller (45), and the cooling operation, the heating operation, and the respective blowing operations are performed.
[0057]
-Effects of Embodiment 1-
As described above, according to the first embodiment, the indoor unit (1) is basically controlled to be horizontally blown by the wind direction control unit (51), and the human unit is located in the human detection area (C) during the heating operation. When (M) does not exist, the air is blown downward, so that the conditioned air is blown out to a space where no person (M) is present, so that the draft can be reduced. In addition, during the heating operation in which the temperature distribution in the room is likely to be uneven, when the person (M) is not in the person detection area (C), warm conditioned air is blown downward. The temperature in the room can be made uniform.
[0058]
That is, the infrared sensor (43) has a simple configuration in which the detection target is only the human detection area (C) below the indoor unit (1), and the wind direction control unit (51) includes the infrared sensor (43). It is possible to adopt a simple configuration that controls the indoor unit (1) to blow horizontally or blow downward based on the detection result. As a result, it is possible to reduce the cost by adopting a simple configuration of the infrared sensor (43) and the wind direction control unit (51) as a configuration for achieving both the reduction of the draft and the uniformization of the temperature distribution in the room.
[0059]
Furthermore, when the person (M) does not exist in the person detection area (C) during the blowing operation in which the cooling operation is stopped, the control of the wind direction control unit (51) is changed by the blowing direction changing unit (52). Since relatively warm air is sent to the living area (B) by the downward blowing of the indoor unit (1), the temperature of the air that is too cold in the living area (B) can be appropriately raised.
[0060]
Furthermore, when the person (M) is present in the person detection area (C) during the air-blowing operation in which the heating operation and the cooling operation are stopped, the air-blowing air volume control unit (53) adjusts the blowing air volume of the indoor unit (1). Since the energy is reduced, the energy required to drive the fan (20) can be reduced, and the noise associated with driving the fan (20) can be reduced.
[0061]
(Embodiment 2)
FIG. 7 shows a second embodiment of the present invention. In the following embodiments, the same parts as those in FIGS. 1 to 6 are denoted by the same reference numerals, and detailed description thereof will be omitted. In the second embodiment, the controller (45) includes a wind direction control unit (51) and a uniform wind direction changing unit (54).
[0062]
The uniform wind direction changing unit (54) controls the indoor unit (1) to blow horizontally during the cooling operation when the difference between the indoor temperature and the indoor set temperature is greater than a predetermined value and the indoor air conditioning load is relatively large. Then, the control of the wind direction control unit (51) is changed so as to control the indoor unit (1) to blow downward during the heating operation.
[0063]
That is, during the cooling operation and the heating operation, when the temperature difference between the indoor temperature and the indoor set temperature is smaller than the predetermined value and the indoor air conditioning load is relatively small, the indoor unit (1 ) Is controlled by the wind direction controller (51). In other words, the conditioned air is basically blown out in a substantially horizontal direction from the air outlet (16), and when no person (M) is present in the human detection area (C) during the heating operation, the air conditioning air flows downward from the air outlet (16). Is blown out.
[0064]
On the other hand, during the cooling operation, when the difference between the indoor temperature and the indoor set temperature is larger than a predetermined value and the indoor temperature is relatively high, the control of the wind direction control unit (51) is performed by the uniform wind direction changing unit (54). Therefore, the cold conditioned air is blown out from the outlet (16) in the horizontal direction. In the heating operation, when the difference between the indoor temperature and the indoor set temperature is larger than a predetermined value and the indoor temperature is relatively low, the control of the wind direction control unit (51) is performed by the uniform wind direction changing unit (54). , The warm conditioned air is blown downward from the outlet (16).
[0065]
-Effect of Embodiment 2-
Therefore, according to the second embodiment, when the indoor temperature is relatively low and the indoor air-conditioning load is relatively large during the heating operation, the indoor unit (1) is connected to the infrared sensor by the uniform wind direction changing unit (54). It is possible to control downward blowing regardless of the detection result of (43). As a result, even if the presence of the person (M) is detected in the person detection area (C) by the infrared sensor (43), the warm air-conditioned air is blown out to the lower living area (B) in the room. By prioritizing the heating of the air in the area (B) over reducing the draft, the temperature of the entire room can be quickly raised.
[0066]
(Embodiment 3)
FIG. 8 shows a third embodiment of the present invention. In this embodiment, the controller (45) includes a wind direction control unit (45) and an operation start wind direction change unit (55).
[0067]
The operation start wind direction changing unit (55) controls the indoor unit (1) to blow horizontally at the start of the cooling operation, and controls the indoor unit (1) to blow downward at the start of the heating operation. 51) is configured to be changed.
[0068]
That is, during the cooling operation and the heating operation, when the operation is started until a predetermined time elapses from the start of the operation, the control of the wind direction control unit (51) is changed by the operation start wind direction change unit (55). As a result, at the start of the cooling operation, the cold conditioned air is blown out from the outlet in the horizontal direction, while at the start of the heating operation, the warm conditioned air is blown downward from the outlet (16).
[0069]
During the cooling operation and the heating operation, during a normal operation after a predetermined time has elapsed from the start of the operation, the indoor unit (1) is controlled by the wind direction control unit (51), as in the first embodiment.
[0070]
-Effect of Embodiment 3-
Therefore, according to the third embodiment, at the start of the heating operation, the indoor unit (1) is affected by the detection result of the infrared sensor (43) at the start of the heating operation by the operation start wind direction changing unit (55). It is possible to control downward blowing. As a result, at the start of the heating operation, by prioritizing the heating of the air in the lower living area (B) in the room over reducing the draft, the temperature of the entire room can be quickly increased.
[0071]
(Embodiment 4)
9 and 10 show a fourth embodiment of the present invention. In this embodiment, a plurality of indoor units (1) are installed in one room, and the controller (45) of each indoor unit (1) includes a wind direction control unit (51) and a balancing air flow rate as shown in FIG. And a control unit (56). Then, as in the above embodiments, the indoor unit (1) is basically controlled to be horizontally blown by the wind direction control unit (51), while the person (M) is in the person detection area (C) during the heating operation. Is controlled to blow downward when there is no.
[0072]
The balancing air volume control unit (56) controls and reduces the blowing air volume of the indoor unit (1) in which the presence of the person (M) is detected by the infrared sensor (43), and also controls the person (M) by the infrared sensor (43). The configuration is such that the amount of air blown from the indoor unit (1) in which the absence of M) is detected is controlled to increase.
[0073]
The infrared sensor (43) is configured to transmit a detection result by wireless communication. On the other hand, the balancing air volume control unit (56) is configured to receive the detection result of the infrared sensor (43) of each indoor unit (1) by wireless communication. Then, the balancing air volume control unit (56) controls the air volume of the indoor unit (1) based on the received detection result of each infrared sensor (43), and detects the presence of a person in the indoor unit (1). In order to compensate for the reduced amount of blown air, the amount of blown air of the indoor unit (1) where the absence of a person has been detected is increased.
[0074]
FIG. 10 shows the blowing direction and the blowing air volume of each indoor unit (1a, 1b) during the cooling operation. As shown in the figure, for example, two indoor units (1a, 1b) are installed in the room. When the infrared sensor (43) of one indoor unit (1a) detects the absence of a person (M) and the infrared sensor (43) of the other indoor unit (1b) detects the presence of a person (M) In the meantime, the blowing air volume of each indoor unit (1a, 1b) is controlled by the balancing air volume control unit (56) as follows.
[0075]
First, the balancing air volume control unit (56) of the controller (45) of the indoor unit (1b) receives the detection results of the infrared sensors (43, 43) of the indoor units (1a, 1b), respectively, and The amount of air blown out of the machine (1b) is reduced by a predetermined amount from the set air amount in normal operation. Next, the balancing air volume control unit (56) of the controller (45) of the indoor unit (1a) receives the detection results of the infrared sensors (43, 43) of the indoor units (1a, 1b), respectively. The amount of air blown from the indoor unit (1a) is increased by the amount of decrease in the amount of air blown by the indoor unit (1b). That is, regardless of the increase or decrease in the amount of air blown from each indoor unit (1a, 1b), the total amount of air blown into the entire room of each indoor unit (1a, 1b) is maintained.
[0076]
Then, when the presence of the person (M) is detected in both the person detection areas (C) by the infrared sensors (43, 43), and when the person (M) is detected in both the person detection areas (C). When the presence is not detected, the blow-out air volume of each indoor unit (1a, 1b) is maintained at a normal set air volume by the balancing air volume control unit (56). In addition, in the arrangement state of the person (M) shown in FIG. 10, during the heating operation, the indoor unit (1a) is controlled to blow downward by the wind direction control unit (51).
[0077]
-Effects of Embodiment 4-
As described above, according to the fourth embodiment, the air flow rate in the indoor unit (1b) in which the presence of the person (M) is detected by the infrared sensor (43) is reduced by the balancing air volume control unit (56). Therefore, the draft is further reduced, and the amount of air blown out in the indoor unit (1) in which the absence of the person (M) is detected by the infrared sensor (43) is increased to compensate for the amount of air blown into the entire room. , The room can be sufficiently heated or cooled.
[0078]
Further, since the balancing air volume control means (56) receives the detection result of the infrared sensor (43) by wireless communication, the balancing air flow rate control means (56) is balanced with the infrared sensor (43, 43) of each indoor unit (1a, 1b). Wiring between the control unit (56) and the air flow control unit (56) can be omitted.
[0079]
In the above embodiment, the indoor unit (1) of the air conditioner is configured as a ceiling-embedded indoor unit. However, another embodiment of the invention according to claim 1 is a ceiling-hanging indoor unit. And so on.
[0080]
【The invention's effect】
As described above, according to the first aspect of the present invention, a person detecting means for detecting whether a person is present in a predetermined area of the indoor space including a position below the indoor unit, and controlling the indoor unit to blow horizontally. And, when the indoor unit is provided with a wind direction control unit that controls the indoor unit to blow downward when the human detection unit detects the absence of a person during the heating operation of the indoor unit, the indoor unit is controlled by the wind direction control unit, and the conditioned air is Since the air is blown out to a space where no one is present, it is possible to reduce the draft. Furthermore, since the warm conditioned air is appropriately blown downward during the heating operation, the temperature in the room can be made uniform. That is, the human detection means has a simple configuration in which the detection target is only a predetermined area below the indoor unit, and the wind direction control means performs horizontal blowing or downward blowing of the indoor unit based on the detection result of the human detection means. It is a simple configuration to control. As a result, the configuration for achieving both the reduction of the draft and the uniformization of the temperature distribution in the room can be reduced in cost by using a simple configuration of the human detection means and the wind direction control means.
[0081]
According to the invention according to claim 2, the control of the wind direction control means is changed so as to control the indoor unit to blow downward when the human detection means detects the absence of a person during the blowing operation in which the indoor unit suspends the cooling operation. When the cooling operation is stopped, the control of the airflow direction control means is changed by the airflow direction change means when no person is present in a predetermined area below the indoor unit during the airflow operation in which the cooling operation is stopped. Since relatively warm air is sent to the lower space of the room by the downward blow of the indoor unit, the temperature of the air that is too cold in the lower space of the room can be appropriately raised.
[0082]
According to the third aspect of the present invention, when the indoor unit is in the air blowing operation in which the heating operation or the cooling operation is suspended, the air flow control unit for air blowing for reducing the air blowing amount of the indoor unit when the human detecting unit detects the presence of a person is provided. Thereby, during the blowing operation in which the heating operation and the cooling operation are stopped, when a person is present in a predetermined area below the indoor unit, the blowing air amount control means reduces the blowing air amount of the indoor unit. Energy for driving can be reduced, and noise accompanying driving of the blower fan can be reduced.
[0083]
According to the invention according to claim 4, when the temperature difference between the indoor temperature and the indoor set temperature is larger than a predetermined value, the indoor unit is controlled to blow horizontally during the cooling operation, and the indoor unit is controlled to blow downward during the heating operation. By providing the uniform wind direction changing means for changing the control of the wind direction control means, during the heating operation, when the room temperature is relatively low, the control of the wind direction control means is changed by the uniform wind direction changing means, Warm conditioned air is blown downward irrespective of the detection result of the human detection means, so that the room temperature can be quickly raised.
[0084]
According to the invention according to claim 5, the operation start wind direction that changes the control of the wind direction control means so that the indoor unit is controlled to blow horizontally at the start of the cooling operation and the indoor unit is controlled to blow downward at the start of the heating operation. By providing the change means, at the start of the heating operation, the control of the wind direction control means is changed by the operation start wind direction changing means, and regardless of the detection result of the human detection means, warm conditioned air is blown downward. The room temperature can be quickly raised.
[0085]
According to the invention according to claim 6, a plurality of indoor units are installed in one room, and the amount of air blown out of the indoor unit in which the presence of a person has been detected by the human detecting means is controlled to be reduced, and the person detecting means has a By providing a balancing air volume control unit that controls and increases the amount of air blown out of the indoor unit where the absence is detected, the amount of air blown out in the indoor unit where the presence of a person is detected by the human detection unit is reduced. In addition to being able to further reduce, the amount of blown air in the indoor unit in which the absence of a person is detected by the person detection means increases, so that the entire room can be sufficiently heated or cooled.
[0086]
According to the invention according to claim 7, the air flow control means for equilibrium is configured to receive the detection result of the human detection means of each indoor unit by wireless communication. Wiring between the air volume control means can be omitted.
[Brief description of the drawings]
FIG. 1 is a front view illustrating an appearance of an indoor unit of an air conditioner according to a first embodiment.
FIG. 2 is a sectional view taken along line II-II in FIG.
FIG. 3 is an enlarged cross-sectional view showing a swinging blade and an outlet.
FIG. 4 is a block diagram illustrating a configuration of a controller according to the first embodiment.
FIG. 5 is an explanatory diagram showing a state in which the indoor unit is controlled to blow horizontally.
FIG. 6 is an explanatory diagram showing a state in which the indoor unit is controlled to blow downward.
FIG. 7 is a block diagram illustrating a configuration of a controller according to a second embodiment.
FIG. 8 is a block diagram illustrating a configuration of a controller according to a third embodiment.
FIG. 9 is a block diagram illustrating a configuration of a controller according to a fourth embodiment.
FIG. 10 is an explanatory diagram showing an indoor unit in which the blowing air volume is controlled by a balancing air volume control unit.
[Explanation of symbols]
(C) Human detection area
(M) people
(1) Indoor unit (indoor unit)
(43) Infrared sensor (human detection means)
(51) Wind direction control unit (wind direction control means)
(52) Blowing air direction changing unit (blowing air direction changing means)
(53) Blowing air volume control unit (blowing air volume control means)
(54) Uniform wind direction changing unit (uniform wind direction changing means)
(55) Operation start wind direction change unit (operation start wind direction change unit)
(56) Equilibrium air volume control unit (equilibrium air volume control means)

Claims (7)

  1. An air conditioner comprising an indoor unit (1) installed on a ceiling in a room and blowing air-conditioned air into the room, wherein an air blowing direction of the indoor unit (1) is variably set to at least horizontal blowing and downward blowing. hand,
    A person detecting means (43) for detecting whether or not a person exists in a predetermined area (C) of the indoor space including a position below the indoor unit (1);
    The indoor unit (1) is controlled to blow horizontally, and when the human detection means (43) detects the absence of a person during the heating operation of the indoor unit (1), the indoor unit (1) is controlled to blow downward. An air conditioner comprising: a wind direction control means (51).
  2. In claim 1,
    During the air blowing operation in which the indoor unit (1) suspends the cooling operation, when the person detecting means (43) detects the absence of a person, the wind direction control means (51) controls the indoor unit (1) to blow downward. An air conditioner comprising: an air flow direction changing means (52) for changing the control of (1).
  3. In claim 1 or 2,
    When the indoor detecting unit (43) detects the presence of a person during the air blowing operation in which the indoor unit (1) suspends the heating operation or the cooling operation, the air flow controlling unit (10) for blowing air to reduce the amount of air blown out of the indoor unit (1). 53) An air conditioner comprising:
  4. In claim 1,
    If the temperature difference between the indoor temperature and the indoor set temperature is greater than or equal to a predetermined value, the airflow direction is controlled such that the indoor unit (1) is controlled to blow horizontally during the cooling operation and the indoor unit (1) is controlled to blow downward during the heating operation. An air conditioner comprising a uniform wind direction changing means (54) for changing the control of the control means (51).
  5. In claim 1,
    An operation start wind direction that changes the control of the wind direction control means (51) so that the indoor unit (1) is controlled to blow horizontally at the start of the cooling operation and the indoor unit (1) is controlled to blow downward at the start of the heating operation. An air conditioner comprising a change means (55).
  6. In claim 1,
    A plurality of the indoor units (1) are installed in one room,
    The indoor unit (1) in which the amount of air blown out of the indoor unit (1) in which the presence of a person has been detected by the person detecting means (43) is controlled and reduced, and the absence of a person has been detected by the person detecting means (43). An air conditioner comprising: a balancing air volume control means (56) for controlling and increasing the amount of air blown out of the air conditioner.
  7. In claim 6,
    The air conditioner, wherein the balancing air volume control means (56) is configured to receive a detection result of the human detection means (43) of each indoor unit (1) by wireless communication.
JP2002317697A 2002-10-31 2002-10-31 Air conditioner Pending JP2004150731A (en)

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PCT/JP2003/013962 WO2004044498A1 (en) 2002-10-31 2003-10-30 Air conditioner
AU2003280659A AU2003280659A1 (en) 2002-10-31 2003-10-30 Air conditioner

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